1 //===-- X86ISelLowering.cpp - X86 DAG Lowering Implementation -------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the interfaces that X86 uses to lower LLVM code into a
13 //===----------------------------------------------------------------------===//
15 #define DEBUG_TYPE "x86-isel"
16 #include "X86ISelLowering.h"
17 #include "Utils/X86ShuffleDecode.h"
19 #include "X86InstrBuilder.h"
20 #include "X86TargetMachine.h"
21 #include "X86TargetObjectFile.h"
22 #include "llvm/ADT/SmallSet.h"
23 #include "llvm/ADT/Statistic.h"
24 #include "llvm/ADT/StringExtras.h"
25 #include "llvm/ADT/VariadicFunction.h"
26 #include "llvm/CodeGen/IntrinsicLowering.h"
27 #include "llvm/CodeGen/MachineFrameInfo.h"
28 #include "llvm/CodeGen/MachineFunction.h"
29 #include "llvm/CodeGen/MachineInstrBuilder.h"
30 #include "llvm/CodeGen/MachineJumpTableInfo.h"
31 #include "llvm/CodeGen/MachineModuleInfo.h"
32 #include "llvm/CodeGen/MachineRegisterInfo.h"
33 #include "llvm/IR/CallingConv.h"
34 #include "llvm/IR/Constants.h"
35 #include "llvm/IR/DerivedTypes.h"
36 #include "llvm/IR/Function.h"
37 #include "llvm/IR/GlobalAlias.h"
38 #include "llvm/IR/GlobalVariable.h"
39 #include "llvm/IR/Instructions.h"
40 #include "llvm/IR/Intrinsics.h"
41 #include "llvm/IR/LLVMContext.h"
42 #include "llvm/MC/MCAsmInfo.h"
43 #include "llvm/MC/MCContext.h"
44 #include "llvm/MC/MCExpr.h"
45 #include "llvm/MC/MCSymbol.h"
46 #include "llvm/Support/CallSite.h"
47 #include "llvm/Support/Debug.h"
48 #include "llvm/Support/ErrorHandling.h"
49 #include "llvm/Support/MathExtras.h"
50 #include "llvm/Target/TargetOptions.h"
55 STATISTIC(NumTailCalls, "Number of tail calls");
57 // Forward declarations.
58 static SDValue getMOVL(SelectionDAG &DAG, DebugLoc dl, EVT VT, SDValue V1,
61 /// Generate a DAG to grab 128-bits from a vector > 128 bits. This
62 /// sets things up to match to an AVX VEXTRACTF128 instruction or a
63 /// simple subregister reference. Idx is an index in the 128 bits we
64 /// want. It need not be aligned to a 128-bit bounday. That makes
65 /// lowering EXTRACT_VECTOR_ELT operations easier.
66 static SDValue Extract128BitVector(SDValue Vec, unsigned IdxVal,
67 SelectionDAG &DAG, DebugLoc dl) {
68 EVT VT = Vec.getValueType();
69 assert(VT.is256BitVector() && "Unexpected vector size!");
70 EVT ElVT = VT.getVectorElementType();
71 unsigned Factor = VT.getSizeInBits()/128;
72 EVT ResultVT = EVT::getVectorVT(*DAG.getContext(), ElVT,
73 VT.getVectorNumElements()/Factor);
75 // Extract from UNDEF is UNDEF.
76 if (Vec.getOpcode() == ISD::UNDEF)
77 return DAG.getUNDEF(ResultVT);
79 // Extract the relevant 128 bits. Generate an EXTRACT_SUBVECTOR
80 // we can match to VEXTRACTF128.
81 unsigned ElemsPerChunk = 128 / ElVT.getSizeInBits();
83 // This is the index of the first element of the 128-bit chunk
85 unsigned NormalizedIdxVal = (((IdxVal * ElVT.getSizeInBits()) / 128)
88 // If the input is a buildvector just emit a smaller one.
89 if (Vec.getOpcode() == ISD::BUILD_VECTOR)
90 return DAG.getNode(ISD::BUILD_VECTOR, dl, ResultVT,
91 Vec->op_begin()+NormalizedIdxVal, ElemsPerChunk);
93 SDValue VecIdx = DAG.getIntPtrConstant(NormalizedIdxVal);
94 SDValue Result = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, ResultVT, Vec,
100 /// Generate a DAG to put 128-bits into a vector > 128 bits. This
101 /// sets things up to match to an AVX VINSERTF128 instruction or a
102 /// simple superregister reference. Idx is an index in the 128 bits
103 /// we want. It need not be aligned to a 128-bit bounday. That makes
104 /// lowering INSERT_VECTOR_ELT operations easier.
105 static SDValue Insert128BitVector(SDValue Result, SDValue Vec,
106 unsigned IdxVal, SelectionDAG &DAG,
108 // Inserting UNDEF is Result
109 if (Vec.getOpcode() == ISD::UNDEF)
112 EVT VT = Vec.getValueType();
113 assert(VT.is128BitVector() && "Unexpected vector size!");
115 EVT ElVT = VT.getVectorElementType();
116 EVT ResultVT = Result.getValueType();
118 // Insert the relevant 128 bits.
119 unsigned ElemsPerChunk = 128/ElVT.getSizeInBits();
121 // This is the index of the first element of the 128-bit chunk
123 unsigned NormalizedIdxVal = (((IdxVal * ElVT.getSizeInBits())/128)
126 SDValue VecIdx = DAG.getIntPtrConstant(NormalizedIdxVal);
127 return DAG.getNode(ISD::INSERT_SUBVECTOR, dl, ResultVT, Result, Vec,
131 /// Concat two 128-bit vectors into a 256 bit vector using VINSERTF128
132 /// instructions. This is used because creating CONCAT_VECTOR nodes of
133 /// BUILD_VECTORS returns a larger BUILD_VECTOR while we're trying to lower
134 /// large BUILD_VECTORS.
135 static SDValue Concat128BitVectors(SDValue V1, SDValue V2, EVT VT,
136 unsigned NumElems, SelectionDAG &DAG,
138 SDValue V = Insert128BitVector(DAG.getUNDEF(VT), V1, 0, DAG, dl);
139 return Insert128BitVector(V, V2, NumElems/2, DAG, dl);
142 static TargetLoweringObjectFile *createTLOF(X86TargetMachine &TM) {
143 const X86Subtarget *Subtarget = &TM.getSubtarget<X86Subtarget>();
144 bool is64Bit = Subtarget->is64Bit();
146 if (Subtarget->isTargetEnvMacho()) {
148 return new X86_64MachoTargetObjectFile();
149 return new TargetLoweringObjectFileMachO();
152 if (Subtarget->isTargetLinux())
153 return new X86LinuxTargetObjectFile();
154 if (Subtarget->isTargetELF())
155 return new TargetLoweringObjectFileELF();
156 if (Subtarget->isTargetCOFF() && !Subtarget->isTargetEnvMacho())
157 return new TargetLoweringObjectFileCOFF();
158 llvm_unreachable("unknown subtarget type");
161 X86TargetLowering::X86TargetLowering(X86TargetMachine &TM)
162 : TargetLowering(TM, createTLOF(TM)) {
163 Subtarget = &TM.getSubtarget<X86Subtarget>();
164 X86ScalarSSEf64 = Subtarget->hasSSE2();
165 X86ScalarSSEf32 = Subtarget->hasSSE1();
167 RegInfo = TM.getRegisterInfo();
168 TD = getDataLayout();
170 // Set up the TargetLowering object.
171 static const MVT IntVTs[] = { MVT::i8, MVT::i16, MVT::i32, MVT::i64 };
173 // X86 is weird, it always uses i8 for shift amounts and setcc results.
174 setBooleanContents(ZeroOrOneBooleanContent);
175 // X86-SSE is even stranger. It uses -1 or 0 for vector masks.
176 setBooleanVectorContents(ZeroOrNegativeOneBooleanContent);
178 // For 64-bit since we have so many registers use the ILP scheduler, for
179 // 32-bit code use the register pressure specific scheduling.
180 // For Atom, always use ILP scheduling.
181 if (Subtarget->isAtom())
182 setSchedulingPreference(Sched::ILP);
183 else if (Subtarget->is64Bit())
184 setSchedulingPreference(Sched::ILP);
186 setSchedulingPreference(Sched::RegPressure);
187 setStackPointerRegisterToSaveRestore(RegInfo->getStackRegister());
189 // Bypass expensive divides on Atom when compiling with O2
190 if (Subtarget->hasSlowDivide() && TM.getOptLevel() >= CodeGenOpt::Default) {
191 addBypassSlowDiv(32, 8);
192 if (Subtarget->is64Bit())
193 addBypassSlowDiv(64, 16);
196 if (Subtarget->isTargetWindows() && !Subtarget->isTargetCygMing()) {
197 // Setup Windows compiler runtime calls.
198 setLibcallName(RTLIB::SDIV_I64, "_alldiv");
199 setLibcallName(RTLIB::UDIV_I64, "_aulldiv");
200 setLibcallName(RTLIB::SREM_I64, "_allrem");
201 setLibcallName(RTLIB::UREM_I64, "_aullrem");
202 setLibcallName(RTLIB::MUL_I64, "_allmul");
203 setLibcallCallingConv(RTLIB::SDIV_I64, CallingConv::X86_StdCall);
204 setLibcallCallingConv(RTLIB::UDIV_I64, CallingConv::X86_StdCall);
205 setLibcallCallingConv(RTLIB::SREM_I64, CallingConv::X86_StdCall);
206 setLibcallCallingConv(RTLIB::UREM_I64, CallingConv::X86_StdCall);
207 setLibcallCallingConv(RTLIB::MUL_I64, CallingConv::X86_StdCall);
209 // The _ftol2 runtime function has an unusual calling conv, which
210 // is modeled by a special pseudo-instruction.
211 setLibcallName(RTLIB::FPTOUINT_F64_I64, 0);
212 setLibcallName(RTLIB::FPTOUINT_F32_I64, 0);
213 setLibcallName(RTLIB::FPTOUINT_F64_I32, 0);
214 setLibcallName(RTLIB::FPTOUINT_F32_I32, 0);
217 if (Subtarget->isTargetDarwin()) {
218 // Darwin should use _setjmp/_longjmp instead of setjmp/longjmp.
219 setUseUnderscoreSetJmp(false);
220 setUseUnderscoreLongJmp(false);
221 } else if (Subtarget->isTargetMingw()) {
222 // MS runtime is weird: it exports _setjmp, but longjmp!
223 setUseUnderscoreSetJmp(true);
224 setUseUnderscoreLongJmp(false);
226 setUseUnderscoreSetJmp(true);
227 setUseUnderscoreLongJmp(true);
230 // Set up the register classes.
231 addRegisterClass(MVT::i8, &X86::GR8RegClass);
232 addRegisterClass(MVT::i16, &X86::GR16RegClass);
233 addRegisterClass(MVT::i32, &X86::GR32RegClass);
234 if (Subtarget->is64Bit())
235 addRegisterClass(MVT::i64, &X86::GR64RegClass);
237 setLoadExtAction(ISD::SEXTLOAD, MVT::i1, Promote);
239 // We don't accept any truncstore of integer registers.
240 setTruncStoreAction(MVT::i64, MVT::i32, Expand);
241 setTruncStoreAction(MVT::i64, MVT::i16, Expand);
242 setTruncStoreAction(MVT::i64, MVT::i8 , Expand);
243 setTruncStoreAction(MVT::i32, MVT::i16, Expand);
244 setTruncStoreAction(MVT::i32, MVT::i8 , Expand);
245 setTruncStoreAction(MVT::i16, MVT::i8, Expand);
247 // SETOEQ and SETUNE require checking two conditions.
248 setCondCodeAction(ISD::SETOEQ, MVT::f32, Expand);
249 setCondCodeAction(ISD::SETOEQ, MVT::f64, Expand);
250 setCondCodeAction(ISD::SETOEQ, MVT::f80, Expand);
251 setCondCodeAction(ISD::SETUNE, MVT::f32, Expand);
252 setCondCodeAction(ISD::SETUNE, MVT::f64, Expand);
253 setCondCodeAction(ISD::SETUNE, MVT::f80, Expand);
255 // Promote all UINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have this
257 setOperationAction(ISD::UINT_TO_FP , MVT::i1 , Promote);
258 setOperationAction(ISD::UINT_TO_FP , MVT::i8 , Promote);
259 setOperationAction(ISD::UINT_TO_FP , MVT::i16 , Promote);
261 if (Subtarget->is64Bit()) {
262 setOperationAction(ISD::UINT_TO_FP , MVT::i32 , Promote);
263 setOperationAction(ISD::UINT_TO_FP , MVT::i64 , Custom);
264 } else if (!TM.Options.UseSoftFloat) {
265 // We have an algorithm for SSE2->double, and we turn this into a
266 // 64-bit FILD followed by conditional FADD for other targets.
267 setOperationAction(ISD::UINT_TO_FP , MVT::i64 , Custom);
268 // We have an algorithm for SSE2, and we turn this into a 64-bit
269 // FILD for other targets.
270 setOperationAction(ISD::UINT_TO_FP , MVT::i32 , Custom);
273 // Promote i1/i8 SINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have
275 setOperationAction(ISD::SINT_TO_FP , MVT::i1 , Promote);
276 setOperationAction(ISD::SINT_TO_FP , MVT::i8 , Promote);
278 if (!TM.Options.UseSoftFloat) {
279 // SSE has no i16 to fp conversion, only i32
280 if (X86ScalarSSEf32) {
281 setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Promote);
282 // f32 and f64 cases are Legal, f80 case is not
283 setOperationAction(ISD::SINT_TO_FP , MVT::i32 , Custom);
285 setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Custom);
286 setOperationAction(ISD::SINT_TO_FP , MVT::i32 , Custom);
289 setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Promote);
290 setOperationAction(ISD::SINT_TO_FP , MVT::i32 , Promote);
293 // In 32-bit mode these are custom lowered. In 64-bit mode F32 and F64
294 // are Legal, f80 is custom lowered.
295 setOperationAction(ISD::FP_TO_SINT , MVT::i64 , Custom);
296 setOperationAction(ISD::SINT_TO_FP , MVT::i64 , Custom);
298 // Promote i1/i8 FP_TO_SINT to larger FP_TO_SINTS's, as X86 doesn't have
300 setOperationAction(ISD::FP_TO_SINT , MVT::i1 , Promote);
301 setOperationAction(ISD::FP_TO_SINT , MVT::i8 , Promote);
303 if (X86ScalarSSEf32) {
304 setOperationAction(ISD::FP_TO_SINT , MVT::i16 , Promote);
305 // f32 and f64 cases are Legal, f80 case is not
306 setOperationAction(ISD::FP_TO_SINT , MVT::i32 , Custom);
308 setOperationAction(ISD::FP_TO_SINT , MVT::i16 , Custom);
309 setOperationAction(ISD::FP_TO_SINT , MVT::i32 , Custom);
312 // Handle FP_TO_UINT by promoting the destination to a larger signed
314 setOperationAction(ISD::FP_TO_UINT , MVT::i1 , Promote);
315 setOperationAction(ISD::FP_TO_UINT , MVT::i8 , Promote);
316 setOperationAction(ISD::FP_TO_UINT , MVT::i16 , Promote);
318 if (Subtarget->is64Bit()) {
319 setOperationAction(ISD::FP_TO_UINT , MVT::i64 , Expand);
320 setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Promote);
321 } else if (!TM.Options.UseSoftFloat) {
322 // Since AVX is a superset of SSE3, only check for SSE here.
323 if (Subtarget->hasSSE1() && !Subtarget->hasSSE3())
324 // Expand FP_TO_UINT into a select.
325 // FIXME: We would like to use a Custom expander here eventually to do
326 // the optimal thing for SSE vs. the default expansion in the legalizer.
327 setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Expand);
329 // With SSE3 we can use fisttpll to convert to a signed i64; without
330 // SSE, we're stuck with a fistpll.
331 setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Custom);
334 if (isTargetFTOL()) {
335 // Use the _ftol2 runtime function, which has a pseudo-instruction
336 // to handle its weird calling convention.
337 setOperationAction(ISD::FP_TO_UINT , MVT::i64 , Custom);
340 // TODO: when we have SSE, these could be more efficient, by using movd/movq.
341 if (!X86ScalarSSEf64) {
342 setOperationAction(ISD::BITCAST , MVT::f32 , Expand);
343 setOperationAction(ISD::BITCAST , MVT::i32 , Expand);
344 if (Subtarget->is64Bit()) {
345 setOperationAction(ISD::BITCAST , MVT::f64 , Expand);
346 // Without SSE, i64->f64 goes through memory.
347 setOperationAction(ISD::BITCAST , MVT::i64 , Expand);
351 // Scalar integer divide and remainder are lowered to use operations that
352 // produce two results, to match the available instructions. This exposes
353 // the two-result form to trivial CSE, which is able to combine x/y and x%y
354 // into a single instruction.
356 // Scalar integer multiply-high is also lowered to use two-result
357 // operations, to match the available instructions. However, plain multiply
358 // (low) operations are left as Legal, as there are single-result
359 // instructions for this in x86. Using the two-result multiply instructions
360 // when both high and low results are needed must be arranged by dagcombine.
361 for (unsigned i = 0; i != array_lengthof(IntVTs); ++i) {
363 setOperationAction(ISD::MULHS, VT, Expand);
364 setOperationAction(ISD::MULHU, VT, Expand);
365 setOperationAction(ISD::SDIV, VT, Expand);
366 setOperationAction(ISD::UDIV, VT, Expand);
367 setOperationAction(ISD::SREM, VT, Expand);
368 setOperationAction(ISD::UREM, VT, Expand);
370 // Add/Sub overflow ops with MVT::Glues are lowered to EFLAGS dependences.
371 setOperationAction(ISD::ADDC, VT, Custom);
372 setOperationAction(ISD::ADDE, VT, Custom);
373 setOperationAction(ISD::SUBC, VT, Custom);
374 setOperationAction(ISD::SUBE, VT, Custom);
377 setOperationAction(ISD::BR_JT , MVT::Other, Expand);
378 setOperationAction(ISD::BRCOND , MVT::Other, Custom);
379 setOperationAction(ISD::BR_CC , MVT::f32, Expand);
380 setOperationAction(ISD::BR_CC , MVT::f64, Expand);
381 setOperationAction(ISD::BR_CC , MVT::f80, Expand);
382 setOperationAction(ISD::BR_CC , MVT::i8, Expand);
383 setOperationAction(ISD::BR_CC , MVT::i16, Expand);
384 setOperationAction(ISD::BR_CC , MVT::i32, Expand);
385 setOperationAction(ISD::BR_CC , MVT::i64, Expand);
386 setOperationAction(ISD::SELECT_CC , MVT::Other, Expand);
387 if (Subtarget->is64Bit())
388 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i32, Legal);
389 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16 , Legal);
390 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8 , Legal);
391 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1 , Expand);
392 setOperationAction(ISD::FP_ROUND_INREG , MVT::f32 , Expand);
393 setOperationAction(ISD::FREM , MVT::f32 , Expand);
394 setOperationAction(ISD::FREM , MVT::f64 , Expand);
395 setOperationAction(ISD::FREM , MVT::f80 , Expand);
396 setOperationAction(ISD::FLT_ROUNDS_ , MVT::i32 , Custom);
398 // Promote the i8 variants and force them on up to i32 which has a shorter
400 setOperationAction(ISD::CTTZ , MVT::i8 , Promote);
401 AddPromotedToType (ISD::CTTZ , MVT::i8 , MVT::i32);
402 setOperationAction(ISD::CTTZ_ZERO_UNDEF , MVT::i8 , Promote);
403 AddPromotedToType (ISD::CTTZ_ZERO_UNDEF , MVT::i8 , MVT::i32);
404 if (Subtarget->hasBMI()) {
405 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i16 , Expand);
406 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i32 , Expand);
407 if (Subtarget->is64Bit())
408 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i64, Expand);
410 setOperationAction(ISD::CTTZ , MVT::i16 , Custom);
411 setOperationAction(ISD::CTTZ , MVT::i32 , Custom);
412 if (Subtarget->is64Bit())
413 setOperationAction(ISD::CTTZ , MVT::i64 , Custom);
416 if (Subtarget->hasLZCNT()) {
417 // When promoting the i8 variants, force them to i32 for a shorter
419 setOperationAction(ISD::CTLZ , MVT::i8 , Promote);
420 AddPromotedToType (ISD::CTLZ , MVT::i8 , MVT::i32);
421 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i8 , Promote);
422 AddPromotedToType (ISD::CTLZ_ZERO_UNDEF, MVT::i8 , MVT::i32);
423 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i16 , Expand);
424 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i32 , Expand);
425 if (Subtarget->is64Bit())
426 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i64, Expand);
428 setOperationAction(ISD::CTLZ , MVT::i8 , Custom);
429 setOperationAction(ISD::CTLZ , MVT::i16 , Custom);
430 setOperationAction(ISD::CTLZ , MVT::i32 , Custom);
431 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i8 , Custom);
432 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i16 , Custom);
433 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i32 , Custom);
434 if (Subtarget->is64Bit()) {
435 setOperationAction(ISD::CTLZ , MVT::i64 , Custom);
436 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i64, Custom);
440 if (Subtarget->hasPOPCNT()) {
441 setOperationAction(ISD::CTPOP , MVT::i8 , Promote);
443 setOperationAction(ISD::CTPOP , MVT::i8 , Expand);
444 setOperationAction(ISD::CTPOP , MVT::i16 , Expand);
445 setOperationAction(ISD::CTPOP , MVT::i32 , Expand);
446 if (Subtarget->is64Bit())
447 setOperationAction(ISD::CTPOP , MVT::i64 , Expand);
450 setOperationAction(ISD::READCYCLECOUNTER , MVT::i64 , Custom);
451 setOperationAction(ISD::BSWAP , MVT::i16 , Expand);
453 // These should be promoted to a larger select which is supported.
454 setOperationAction(ISD::SELECT , MVT::i1 , Promote);
455 // X86 wants to expand cmov itself.
456 setOperationAction(ISD::SELECT , MVT::i8 , Custom);
457 setOperationAction(ISD::SELECT , MVT::i16 , Custom);
458 setOperationAction(ISD::SELECT , MVT::i32 , Custom);
459 setOperationAction(ISD::SELECT , MVT::f32 , Custom);
460 setOperationAction(ISD::SELECT , MVT::f64 , Custom);
461 setOperationAction(ISD::SELECT , MVT::f80 , Custom);
462 setOperationAction(ISD::SETCC , MVT::i8 , Custom);
463 setOperationAction(ISD::SETCC , MVT::i16 , Custom);
464 setOperationAction(ISD::SETCC , MVT::i32 , Custom);
465 setOperationAction(ISD::SETCC , MVT::f32 , Custom);
466 setOperationAction(ISD::SETCC , MVT::f64 , Custom);
467 setOperationAction(ISD::SETCC , MVT::f80 , Custom);
468 if (Subtarget->is64Bit()) {
469 setOperationAction(ISD::SELECT , MVT::i64 , Custom);
470 setOperationAction(ISD::SETCC , MVT::i64 , Custom);
472 setOperationAction(ISD::EH_RETURN , MVT::Other, Custom);
473 // NOTE: EH_SJLJ_SETJMP/_LONGJMP supported here is NOT intened to support
474 // SjLj exception handling but a light-weight setjmp/longjmp replacement to
475 // support continuation, user-level threading, and etc.. As a result, no
476 // other SjLj exception interfaces are implemented and please don't build
477 // your own exception handling based on them.
478 // LLVM/Clang supports zero-cost DWARF exception handling.
479 setOperationAction(ISD::EH_SJLJ_SETJMP, MVT::i32, Custom);
480 setOperationAction(ISD::EH_SJLJ_LONGJMP, MVT::Other, Custom);
483 setOperationAction(ISD::ConstantPool , MVT::i32 , Custom);
484 setOperationAction(ISD::JumpTable , MVT::i32 , Custom);
485 setOperationAction(ISD::GlobalAddress , MVT::i32 , Custom);
486 setOperationAction(ISD::GlobalTLSAddress, MVT::i32 , Custom);
487 if (Subtarget->is64Bit())
488 setOperationAction(ISD::GlobalTLSAddress, MVT::i64, Custom);
489 setOperationAction(ISD::ExternalSymbol , MVT::i32 , Custom);
490 setOperationAction(ISD::BlockAddress , MVT::i32 , Custom);
491 if (Subtarget->is64Bit()) {
492 setOperationAction(ISD::ConstantPool , MVT::i64 , Custom);
493 setOperationAction(ISD::JumpTable , MVT::i64 , Custom);
494 setOperationAction(ISD::GlobalAddress , MVT::i64 , Custom);
495 setOperationAction(ISD::ExternalSymbol, MVT::i64 , Custom);
496 setOperationAction(ISD::BlockAddress , MVT::i64 , Custom);
498 // 64-bit addm sub, shl, sra, srl (iff 32-bit x86)
499 setOperationAction(ISD::SHL_PARTS , MVT::i32 , Custom);
500 setOperationAction(ISD::SRA_PARTS , MVT::i32 , Custom);
501 setOperationAction(ISD::SRL_PARTS , MVT::i32 , Custom);
502 if (Subtarget->is64Bit()) {
503 setOperationAction(ISD::SHL_PARTS , MVT::i64 , Custom);
504 setOperationAction(ISD::SRA_PARTS , MVT::i64 , Custom);
505 setOperationAction(ISD::SRL_PARTS , MVT::i64 , Custom);
508 if (Subtarget->hasSSE1())
509 setOperationAction(ISD::PREFETCH , MVT::Other, Legal);
511 setOperationAction(ISD::MEMBARRIER , MVT::Other, Custom);
512 setOperationAction(ISD::ATOMIC_FENCE , MVT::Other, Custom);
514 // On X86 and X86-64, atomic operations are lowered to locked instructions.
515 // Locked instructions, in turn, have implicit fence semantics (all memory
516 // operations are flushed before issuing the locked instruction, and they
517 // are not buffered), so we can fold away the common pattern of
518 // fence-atomic-fence.
519 setShouldFoldAtomicFences(true);
521 // Expand certain atomics
522 for (unsigned i = 0; i != array_lengthof(IntVTs); ++i) {
524 setOperationAction(ISD::ATOMIC_CMP_SWAP, VT, Custom);
525 setOperationAction(ISD::ATOMIC_LOAD_SUB, VT, Custom);
526 setOperationAction(ISD::ATOMIC_STORE, VT, Custom);
529 if (!Subtarget->is64Bit()) {
530 setOperationAction(ISD::ATOMIC_LOAD, MVT::i64, Custom);
531 setOperationAction(ISD::ATOMIC_LOAD_ADD, MVT::i64, Custom);
532 setOperationAction(ISD::ATOMIC_LOAD_SUB, MVT::i64, Custom);
533 setOperationAction(ISD::ATOMIC_LOAD_AND, MVT::i64, Custom);
534 setOperationAction(ISD::ATOMIC_LOAD_OR, MVT::i64, Custom);
535 setOperationAction(ISD::ATOMIC_LOAD_XOR, MVT::i64, Custom);
536 setOperationAction(ISD::ATOMIC_LOAD_NAND, MVT::i64, Custom);
537 setOperationAction(ISD::ATOMIC_SWAP, MVT::i64, Custom);
538 setOperationAction(ISD::ATOMIC_LOAD_MAX, MVT::i64, Custom);
539 setOperationAction(ISD::ATOMIC_LOAD_MIN, MVT::i64, Custom);
540 setOperationAction(ISD::ATOMIC_LOAD_UMAX, MVT::i64, Custom);
541 setOperationAction(ISD::ATOMIC_LOAD_UMIN, MVT::i64, Custom);
544 if (Subtarget->hasCmpxchg16b()) {
545 setOperationAction(ISD::ATOMIC_CMP_SWAP, MVT::i128, Custom);
548 // FIXME - use subtarget debug flags
549 if (!Subtarget->isTargetDarwin() &&
550 !Subtarget->isTargetELF() &&
551 !Subtarget->isTargetCygMing()) {
552 setOperationAction(ISD::EH_LABEL, MVT::Other, Expand);
555 setOperationAction(ISD::EXCEPTIONADDR, MVT::i64, Expand);
556 setOperationAction(ISD::EHSELECTION, MVT::i64, Expand);
557 setOperationAction(ISD::EXCEPTIONADDR, MVT::i32, Expand);
558 setOperationAction(ISD::EHSELECTION, MVT::i32, Expand);
559 if (Subtarget->is64Bit()) {
560 setExceptionPointerRegister(X86::RAX);
561 setExceptionSelectorRegister(X86::RDX);
563 setExceptionPointerRegister(X86::EAX);
564 setExceptionSelectorRegister(X86::EDX);
566 setOperationAction(ISD::FRAME_TO_ARGS_OFFSET, MVT::i32, Custom);
567 setOperationAction(ISD::FRAME_TO_ARGS_OFFSET, MVT::i64, Custom);
569 setOperationAction(ISD::INIT_TRAMPOLINE, MVT::Other, Custom);
570 setOperationAction(ISD::ADJUST_TRAMPOLINE, MVT::Other, Custom);
572 setOperationAction(ISD::TRAP, MVT::Other, Legal);
573 setOperationAction(ISD::DEBUGTRAP, MVT::Other, Legal);
575 // VASTART needs to be custom lowered to use the VarArgsFrameIndex
576 setOperationAction(ISD::VASTART , MVT::Other, Custom);
577 setOperationAction(ISD::VAEND , MVT::Other, Expand);
578 if (Subtarget->is64Bit()) {
579 setOperationAction(ISD::VAARG , MVT::Other, Custom);
580 setOperationAction(ISD::VACOPY , MVT::Other, Custom);
582 setOperationAction(ISD::VAARG , MVT::Other, Expand);
583 setOperationAction(ISD::VACOPY , MVT::Other, Expand);
586 setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
587 setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
589 if (Subtarget->isTargetCOFF() && !Subtarget->isTargetEnvMacho())
590 setOperationAction(ISD::DYNAMIC_STACKALLOC, Subtarget->is64Bit() ?
591 MVT::i64 : MVT::i32, Custom);
592 else if (TM.Options.EnableSegmentedStacks)
593 setOperationAction(ISD::DYNAMIC_STACKALLOC, Subtarget->is64Bit() ?
594 MVT::i64 : MVT::i32, Custom);
596 setOperationAction(ISD::DYNAMIC_STACKALLOC, Subtarget->is64Bit() ?
597 MVT::i64 : MVT::i32, Expand);
599 if (!TM.Options.UseSoftFloat && X86ScalarSSEf64) {
600 // f32 and f64 use SSE.
601 // Set up the FP register classes.
602 addRegisterClass(MVT::f32, &X86::FR32RegClass);
603 addRegisterClass(MVT::f64, &X86::FR64RegClass);
605 // Use ANDPD to simulate FABS.
606 setOperationAction(ISD::FABS , MVT::f64, Custom);
607 setOperationAction(ISD::FABS , MVT::f32, Custom);
609 // Use XORP to simulate FNEG.
610 setOperationAction(ISD::FNEG , MVT::f64, Custom);
611 setOperationAction(ISD::FNEG , MVT::f32, Custom);
613 // Use ANDPD and ORPD to simulate FCOPYSIGN.
614 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Custom);
615 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
617 // Lower this to FGETSIGNx86 plus an AND.
618 setOperationAction(ISD::FGETSIGN, MVT::i64, Custom);
619 setOperationAction(ISD::FGETSIGN, MVT::i32, Custom);
621 // We don't support sin/cos/fmod
622 setOperationAction(ISD::FSIN , MVT::f64, Expand);
623 setOperationAction(ISD::FCOS , MVT::f64, Expand);
624 setOperationAction(ISD::FSINCOS, MVT::f64, Expand);
625 setOperationAction(ISD::FSIN , MVT::f32, Expand);
626 setOperationAction(ISD::FCOS , MVT::f32, Expand);
627 setOperationAction(ISD::FSINCOS, MVT::f32, Expand);
629 // Expand FP immediates into loads from the stack, except for the special
631 addLegalFPImmediate(APFloat(+0.0)); // xorpd
632 addLegalFPImmediate(APFloat(+0.0f)); // xorps
633 } else if (!TM.Options.UseSoftFloat && X86ScalarSSEf32) {
634 // Use SSE for f32, x87 for f64.
635 // Set up the FP register classes.
636 addRegisterClass(MVT::f32, &X86::FR32RegClass);
637 addRegisterClass(MVT::f64, &X86::RFP64RegClass);
639 // Use ANDPS to simulate FABS.
640 setOperationAction(ISD::FABS , MVT::f32, Custom);
642 // Use XORP to simulate FNEG.
643 setOperationAction(ISD::FNEG , MVT::f32, Custom);
645 setOperationAction(ISD::UNDEF, MVT::f64, Expand);
647 // Use ANDPS and ORPS to simulate FCOPYSIGN.
648 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
649 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
651 // We don't support sin/cos/fmod
652 setOperationAction(ISD::FSIN , MVT::f32, Expand);
653 setOperationAction(ISD::FCOS , MVT::f32, Expand);
654 setOperationAction(ISD::FSINCOS, MVT::f32, Expand);
656 // Special cases we handle for FP constants.
657 addLegalFPImmediate(APFloat(+0.0f)); // xorps
658 addLegalFPImmediate(APFloat(+0.0)); // FLD0
659 addLegalFPImmediate(APFloat(+1.0)); // FLD1
660 addLegalFPImmediate(APFloat(-0.0)); // FLD0/FCHS
661 addLegalFPImmediate(APFloat(-1.0)); // FLD1/FCHS
663 if (!TM.Options.UnsafeFPMath) {
664 setOperationAction(ISD::FSIN , MVT::f64, Expand);
665 setOperationAction(ISD::FCOS , MVT::f64, Expand);
666 setOperationAction(ISD::FSINCOS, MVT::f64, Expand);
668 } else if (!TM.Options.UseSoftFloat) {
669 // f32 and f64 in x87.
670 // Set up the FP register classes.
671 addRegisterClass(MVT::f64, &X86::RFP64RegClass);
672 addRegisterClass(MVT::f32, &X86::RFP32RegClass);
674 setOperationAction(ISD::UNDEF, MVT::f64, Expand);
675 setOperationAction(ISD::UNDEF, MVT::f32, Expand);
676 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
677 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand);
679 if (!TM.Options.UnsafeFPMath) {
680 setOperationAction(ISD::FSIN , MVT::f64, Expand);
681 setOperationAction(ISD::FSIN , MVT::f32, Expand);
682 setOperationAction(ISD::FCOS , MVT::f64, Expand);
683 setOperationAction(ISD::FCOS , MVT::f32, Expand);
684 setOperationAction(ISD::FSINCOS, MVT::f64, Expand);
685 setOperationAction(ISD::FSINCOS, MVT::f32, Expand);
687 addLegalFPImmediate(APFloat(+0.0)); // FLD0
688 addLegalFPImmediate(APFloat(+1.0)); // FLD1
689 addLegalFPImmediate(APFloat(-0.0)); // FLD0/FCHS
690 addLegalFPImmediate(APFloat(-1.0)); // FLD1/FCHS
691 addLegalFPImmediate(APFloat(+0.0f)); // FLD0
692 addLegalFPImmediate(APFloat(+1.0f)); // FLD1
693 addLegalFPImmediate(APFloat(-0.0f)); // FLD0/FCHS
694 addLegalFPImmediate(APFloat(-1.0f)); // FLD1/FCHS
697 // We don't support FMA.
698 setOperationAction(ISD::FMA, MVT::f64, Expand);
699 setOperationAction(ISD::FMA, MVT::f32, Expand);
701 // Long double always uses X87.
702 if (!TM.Options.UseSoftFloat) {
703 addRegisterClass(MVT::f80, &X86::RFP80RegClass);
704 setOperationAction(ISD::UNDEF, MVT::f80, Expand);
705 setOperationAction(ISD::FCOPYSIGN, MVT::f80, Expand);
707 APFloat TmpFlt = APFloat::getZero(APFloat::x87DoubleExtended);
708 addLegalFPImmediate(TmpFlt); // FLD0
710 addLegalFPImmediate(TmpFlt); // FLD0/FCHS
713 APFloat TmpFlt2(+1.0);
714 TmpFlt2.convert(APFloat::x87DoubleExtended, APFloat::rmNearestTiesToEven,
716 addLegalFPImmediate(TmpFlt2); // FLD1
717 TmpFlt2.changeSign();
718 addLegalFPImmediate(TmpFlt2); // FLD1/FCHS
721 if (!TM.Options.UnsafeFPMath) {
722 setOperationAction(ISD::FSIN , MVT::f80, Expand);
723 setOperationAction(ISD::FCOS , MVT::f80, Expand);
724 setOperationAction(ISD::FSINCOS, MVT::f80, Expand);
727 setOperationAction(ISD::FFLOOR, MVT::f80, Expand);
728 setOperationAction(ISD::FCEIL, MVT::f80, Expand);
729 setOperationAction(ISD::FTRUNC, MVT::f80, Expand);
730 setOperationAction(ISD::FRINT, MVT::f80, Expand);
731 setOperationAction(ISD::FNEARBYINT, MVT::f80, Expand);
732 setOperationAction(ISD::FMA, MVT::f80, Expand);
735 // Always use a library call for pow.
736 setOperationAction(ISD::FPOW , MVT::f32 , Expand);
737 setOperationAction(ISD::FPOW , MVT::f64 , Expand);
738 setOperationAction(ISD::FPOW , MVT::f80 , Expand);
740 setOperationAction(ISD::FLOG, MVT::f80, Expand);
741 setOperationAction(ISD::FLOG2, MVT::f80, Expand);
742 setOperationAction(ISD::FLOG10, MVT::f80, Expand);
743 setOperationAction(ISD::FEXP, MVT::f80, Expand);
744 setOperationAction(ISD::FEXP2, MVT::f80, Expand);
746 // First set operation action for all vector types to either promote
747 // (for widening) or expand (for scalarization). Then we will selectively
748 // turn on ones that can be effectively codegen'd.
749 for (int i = MVT::FIRST_VECTOR_VALUETYPE;
750 i <= MVT::LAST_VECTOR_VALUETYPE; ++i) {
751 MVT VT = (MVT::SimpleValueType)i;
752 setOperationAction(ISD::ADD , VT, Expand);
753 setOperationAction(ISD::SUB , VT, Expand);
754 setOperationAction(ISD::FADD, VT, Expand);
755 setOperationAction(ISD::FNEG, VT, Expand);
756 setOperationAction(ISD::FSUB, VT, Expand);
757 setOperationAction(ISD::MUL , VT, Expand);
758 setOperationAction(ISD::FMUL, VT, Expand);
759 setOperationAction(ISD::SDIV, VT, Expand);
760 setOperationAction(ISD::UDIV, VT, Expand);
761 setOperationAction(ISD::FDIV, VT, Expand);
762 setOperationAction(ISD::SREM, VT, Expand);
763 setOperationAction(ISD::UREM, VT, Expand);
764 setOperationAction(ISD::LOAD, VT, Expand);
765 setOperationAction(ISD::VECTOR_SHUFFLE, VT, Expand);
766 setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT,Expand);
767 setOperationAction(ISD::INSERT_VECTOR_ELT, VT, Expand);
768 setOperationAction(ISD::EXTRACT_SUBVECTOR, VT,Expand);
769 setOperationAction(ISD::INSERT_SUBVECTOR, VT,Expand);
770 setOperationAction(ISD::FABS, VT, Expand);
771 setOperationAction(ISD::FSIN, VT, Expand);
772 setOperationAction(ISD::FSINCOS, VT, Expand);
773 setOperationAction(ISD::FCOS, VT, Expand);
774 setOperationAction(ISD::FSINCOS, VT, Expand);
775 setOperationAction(ISD::FREM, VT, Expand);
776 setOperationAction(ISD::FMA, VT, Expand);
777 setOperationAction(ISD::FPOWI, VT, Expand);
778 setOperationAction(ISD::FSQRT, VT, Expand);
779 setOperationAction(ISD::FCOPYSIGN, VT, Expand);
780 setOperationAction(ISD::FFLOOR, VT, Expand);
781 setOperationAction(ISD::FCEIL, VT, Expand);
782 setOperationAction(ISD::FTRUNC, VT, Expand);
783 setOperationAction(ISD::FRINT, VT, Expand);
784 setOperationAction(ISD::FNEARBYINT, VT, Expand);
785 setOperationAction(ISD::SMUL_LOHI, VT, Expand);
786 setOperationAction(ISD::UMUL_LOHI, VT, Expand);
787 setOperationAction(ISD::SDIVREM, VT, Expand);
788 setOperationAction(ISD::UDIVREM, VT, Expand);
789 setOperationAction(ISD::FPOW, VT, Expand);
790 setOperationAction(ISD::CTPOP, VT, Expand);
791 setOperationAction(ISD::CTTZ, VT, Expand);
792 setOperationAction(ISD::CTTZ_ZERO_UNDEF, VT, Expand);
793 setOperationAction(ISD::CTLZ, VT, Expand);
794 setOperationAction(ISD::CTLZ_ZERO_UNDEF, VT, Expand);
795 setOperationAction(ISD::SHL, VT, Expand);
796 setOperationAction(ISD::SRA, VT, Expand);
797 setOperationAction(ISD::SRL, VT, Expand);
798 setOperationAction(ISD::ROTL, VT, Expand);
799 setOperationAction(ISD::ROTR, VT, Expand);
800 setOperationAction(ISD::BSWAP, VT, Expand);
801 setOperationAction(ISD::SETCC, VT, Expand);
802 setOperationAction(ISD::FLOG, VT, Expand);
803 setOperationAction(ISD::FLOG2, VT, Expand);
804 setOperationAction(ISD::FLOG10, VT, Expand);
805 setOperationAction(ISD::FEXP, VT, Expand);
806 setOperationAction(ISD::FEXP2, VT, Expand);
807 setOperationAction(ISD::FP_TO_UINT, VT, Expand);
808 setOperationAction(ISD::FP_TO_SINT, VT, Expand);
809 setOperationAction(ISD::UINT_TO_FP, VT, Expand);
810 setOperationAction(ISD::SINT_TO_FP, VT, Expand);
811 setOperationAction(ISD::SIGN_EXTEND_INREG, VT,Expand);
812 setOperationAction(ISD::TRUNCATE, VT, Expand);
813 setOperationAction(ISD::SIGN_EXTEND, VT, Expand);
814 setOperationAction(ISD::ZERO_EXTEND, VT, Expand);
815 setOperationAction(ISD::ANY_EXTEND, VT, Expand);
816 setOperationAction(ISD::VSELECT, VT, Expand);
817 for (int InnerVT = MVT::FIRST_VECTOR_VALUETYPE;
818 InnerVT <= MVT::LAST_VECTOR_VALUETYPE; ++InnerVT)
819 setTruncStoreAction(VT,
820 (MVT::SimpleValueType)InnerVT, Expand);
821 setLoadExtAction(ISD::SEXTLOAD, VT, Expand);
822 setLoadExtAction(ISD::ZEXTLOAD, VT, Expand);
823 setLoadExtAction(ISD::EXTLOAD, VT, Expand);
826 // FIXME: In order to prevent SSE instructions being expanded to MMX ones
827 // with -msoft-float, disable use of MMX as well.
828 if (!TM.Options.UseSoftFloat && Subtarget->hasMMX()) {
829 addRegisterClass(MVT::x86mmx, &X86::VR64RegClass);
830 // No operations on x86mmx supported, everything uses intrinsics.
833 // MMX-sized vectors (other than x86mmx) are expected to be expanded
834 // into smaller operations.
835 setOperationAction(ISD::MULHS, MVT::v8i8, Expand);
836 setOperationAction(ISD::MULHS, MVT::v4i16, Expand);
837 setOperationAction(ISD::MULHS, MVT::v2i32, Expand);
838 setOperationAction(ISD::MULHS, MVT::v1i64, Expand);
839 setOperationAction(ISD::AND, MVT::v8i8, Expand);
840 setOperationAction(ISD::AND, MVT::v4i16, Expand);
841 setOperationAction(ISD::AND, MVT::v2i32, Expand);
842 setOperationAction(ISD::AND, MVT::v1i64, Expand);
843 setOperationAction(ISD::OR, MVT::v8i8, Expand);
844 setOperationAction(ISD::OR, MVT::v4i16, Expand);
845 setOperationAction(ISD::OR, MVT::v2i32, Expand);
846 setOperationAction(ISD::OR, MVT::v1i64, Expand);
847 setOperationAction(ISD::XOR, MVT::v8i8, Expand);
848 setOperationAction(ISD::XOR, MVT::v4i16, Expand);
849 setOperationAction(ISD::XOR, MVT::v2i32, Expand);
850 setOperationAction(ISD::XOR, MVT::v1i64, Expand);
851 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v8i8, Expand);
852 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v4i16, Expand);
853 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v2i32, Expand);
854 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v1i64, Expand);
855 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v1i64, Expand);
856 setOperationAction(ISD::SELECT, MVT::v8i8, Expand);
857 setOperationAction(ISD::SELECT, MVT::v4i16, Expand);
858 setOperationAction(ISD::SELECT, MVT::v2i32, Expand);
859 setOperationAction(ISD::SELECT, MVT::v1i64, Expand);
860 setOperationAction(ISD::BITCAST, MVT::v8i8, Expand);
861 setOperationAction(ISD::BITCAST, MVT::v4i16, Expand);
862 setOperationAction(ISD::BITCAST, MVT::v2i32, Expand);
863 setOperationAction(ISD::BITCAST, MVT::v1i64, Expand);
865 if (!TM.Options.UseSoftFloat && Subtarget->hasSSE1()) {
866 addRegisterClass(MVT::v4f32, &X86::VR128RegClass);
868 setOperationAction(ISD::FADD, MVT::v4f32, Legal);
869 setOperationAction(ISD::FSUB, MVT::v4f32, Legal);
870 setOperationAction(ISD::FMUL, MVT::v4f32, Legal);
871 setOperationAction(ISD::FDIV, MVT::v4f32, Legal);
872 setOperationAction(ISD::FSQRT, MVT::v4f32, Legal);
873 setOperationAction(ISD::FNEG, MVT::v4f32, Custom);
874 setOperationAction(ISD::FABS, MVT::v4f32, Custom);
875 setOperationAction(ISD::LOAD, MVT::v4f32, Legal);
876 setOperationAction(ISD::BUILD_VECTOR, MVT::v4f32, Custom);
877 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v4f32, Custom);
878 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4f32, Custom);
879 setOperationAction(ISD::SELECT, MVT::v4f32, Custom);
882 if (!TM.Options.UseSoftFloat && Subtarget->hasSSE2()) {
883 addRegisterClass(MVT::v2f64, &X86::VR128RegClass);
885 // FIXME: Unfortunately -soft-float and -no-implicit-float means XMM
886 // registers cannot be used even for integer operations.
887 addRegisterClass(MVT::v16i8, &X86::VR128RegClass);
888 addRegisterClass(MVT::v8i16, &X86::VR128RegClass);
889 addRegisterClass(MVT::v4i32, &X86::VR128RegClass);
890 addRegisterClass(MVT::v2i64, &X86::VR128RegClass);
892 setOperationAction(ISD::ADD, MVT::v16i8, Legal);
893 setOperationAction(ISD::ADD, MVT::v8i16, Legal);
894 setOperationAction(ISD::ADD, MVT::v4i32, Legal);
895 setOperationAction(ISD::ADD, MVT::v2i64, Legal);
896 setOperationAction(ISD::MUL, MVT::v4i32, Custom);
897 setOperationAction(ISD::MUL, MVT::v2i64, Custom);
898 setOperationAction(ISD::SUB, MVT::v16i8, Legal);
899 setOperationAction(ISD::SUB, MVT::v8i16, Legal);
900 setOperationAction(ISD::SUB, MVT::v4i32, Legal);
901 setOperationAction(ISD::SUB, MVT::v2i64, Legal);
902 setOperationAction(ISD::MUL, MVT::v8i16, Legal);
903 setOperationAction(ISD::FADD, MVT::v2f64, Legal);
904 setOperationAction(ISD::FSUB, MVT::v2f64, Legal);
905 setOperationAction(ISD::FMUL, MVT::v2f64, Legal);
906 setOperationAction(ISD::FDIV, MVT::v2f64, Legal);
907 setOperationAction(ISD::FSQRT, MVT::v2f64, Legal);
908 setOperationAction(ISD::FNEG, MVT::v2f64, Custom);
909 setOperationAction(ISD::FABS, MVT::v2f64, Custom);
911 setOperationAction(ISD::SETCC, MVT::v2i64, Custom);
912 setOperationAction(ISD::SETCC, MVT::v16i8, Custom);
913 setOperationAction(ISD::SETCC, MVT::v8i16, Custom);
914 setOperationAction(ISD::SETCC, MVT::v4i32, Custom);
916 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v16i8, Custom);
917 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v8i16, Custom);
918 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8i16, Custom);
919 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4i32, Custom);
920 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4f32, Custom);
922 // Custom lower build_vector, vector_shuffle, and extract_vector_elt.
923 for (int i = MVT::v16i8; i != MVT::v2i64; ++i) {
924 MVT VT = (MVT::SimpleValueType)i;
925 // Do not attempt to custom lower non-power-of-2 vectors
926 if (!isPowerOf2_32(VT.getVectorNumElements()))
928 // Do not attempt to custom lower non-128-bit vectors
929 if (!VT.is128BitVector())
931 setOperationAction(ISD::BUILD_VECTOR, VT, Custom);
932 setOperationAction(ISD::VECTOR_SHUFFLE, VT, Custom);
933 setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Custom);
936 setOperationAction(ISD::BUILD_VECTOR, MVT::v2f64, Custom);
937 setOperationAction(ISD::BUILD_VECTOR, MVT::v2i64, Custom);
938 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2f64, Custom);
939 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2i64, Custom);
940 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2f64, Custom);
941 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2f64, Custom);
943 if (Subtarget->is64Bit()) {
944 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2i64, Custom);
945 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2i64, Custom);
948 // Promote v16i8, v8i16, v4i32 load, select, and, or, xor to v2i64.
949 for (int i = MVT::v16i8; i != MVT::v2i64; ++i) {
950 MVT VT = (MVT::SimpleValueType)i;
952 // Do not attempt to promote non-128-bit vectors
953 if (!VT.is128BitVector())
956 setOperationAction(ISD::AND, VT, Promote);
957 AddPromotedToType (ISD::AND, VT, MVT::v2i64);
958 setOperationAction(ISD::OR, VT, Promote);
959 AddPromotedToType (ISD::OR, VT, MVT::v2i64);
960 setOperationAction(ISD::XOR, VT, Promote);
961 AddPromotedToType (ISD::XOR, VT, MVT::v2i64);
962 setOperationAction(ISD::LOAD, VT, Promote);
963 AddPromotedToType (ISD::LOAD, VT, MVT::v2i64);
964 setOperationAction(ISD::SELECT, VT, Promote);
965 AddPromotedToType (ISD::SELECT, VT, MVT::v2i64);
968 setTruncStoreAction(MVT::f64, MVT::f32, Expand);
970 // Custom lower v2i64 and v2f64 selects.
971 setOperationAction(ISD::LOAD, MVT::v2f64, Legal);
972 setOperationAction(ISD::LOAD, MVT::v2i64, Legal);
973 setOperationAction(ISD::SELECT, MVT::v2f64, Custom);
974 setOperationAction(ISD::SELECT, MVT::v2i64, Custom);
976 setOperationAction(ISD::FP_TO_SINT, MVT::v4i32, Legal);
977 setOperationAction(ISD::SINT_TO_FP, MVT::v4i32, Legal);
979 setOperationAction(ISD::UINT_TO_FP, MVT::v4i8, Custom);
980 setOperationAction(ISD::UINT_TO_FP, MVT::v4i16, Custom);
981 // As there is no 64-bit GPR available, we need build a special custom
982 // sequence to convert from v2i32 to v2f32.
983 if (!Subtarget->is64Bit())
984 setOperationAction(ISD::UINT_TO_FP, MVT::v2f32, Custom);
986 setOperationAction(ISD::FP_EXTEND, MVT::v2f32, Custom);
987 setOperationAction(ISD::FP_ROUND, MVT::v2f32, Custom);
989 setLoadExtAction(ISD::EXTLOAD, MVT::v2f32, Legal);
992 if (Subtarget->hasSSE41()) {
993 setOperationAction(ISD::FFLOOR, MVT::f32, Legal);
994 setOperationAction(ISD::FCEIL, MVT::f32, Legal);
995 setOperationAction(ISD::FTRUNC, MVT::f32, Legal);
996 setOperationAction(ISD::FRINT, MVT::f32, Legal);
997 setOperationAction(ISD::FNEARBYINT, MVT::f32, Legal);
998 setOperationAction(ISD::FFLOOR, MVT::f64, Legal);
999 setOperationAction(ISD::FCEIL, MVT::f64, Legal);
1000 setOperationAction(ISD::FTRUNC, MVT::f64, Legal);
1001 setOperationAction(ISD::FRINT, MVT::f64, Legal);
1002 setOperationAction(ISD::FNEARBYINT, MVT::f64, Legal);
1004 setOperationAction(ISD::FFLOOR, MVT::v4f32, Legal);
1005 setOperationAction(ISD::FCEIL, MVT::v4f32, Legal);
1006 setOperationAction(ISD::FTRUNC, MVT::v4f32, Legal);
1007 setOperationAction(ISD::FRINT, MVT::v4f32, Legal);
1008 setOperationAction(ISD::FNEARBYINT, MVT::v4f32, Legal);
1009 setOperationAction(ISD::FFLOOR, MVT::v2f64, Legal);
1010 setOperationAction(ISD::FCEIL, MVT::v2f64, Legal);
1011 setOperationAction(ISD::FTRUNC, MVT::v2f64, Legal);
1012 setOperationAction(ISD::FRINT, MVT::v2f64, Legal);
1013 setOperationAction(ISD::FNEARBYINT, MVT::v2f64, Legal);
1015 // FIXME: Do we need to handle scalar-to-vector here?
1016 setOperationAction(ISD::MUL, MVT::v4i32, Legal);
1018 setOperationAction(ISD::VSELECT, MVT::v2f64, Legal);
1019 setOperationAction(ISD::VSELECT, MVT::v2i64, Legal);
1020 setOperationAction(ISD::VSELECT, MVT::v16i8, Legal);
1021 setOperationAction(ISD::VSELECT, MVT::v4i32, Legal);
1022 setOperationAction(ISD::VSELECT, MVT::v4f32, Legal);
1024 // i8 and i16 vectors are custom , because the source register and source
1025 // source memory operand types are not the same width. f32 vectors are
1026 // custom since the immediate controlling the insert encodes additional
1028 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v16i8, Custom);
1029 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8i16, Custom);
1030 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4i32, Custom);
1031 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4f32, Custom);
1033 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v16i8, Custom);
1034 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v8i16, Custom);
1035 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4i32, Custom);
1036 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4f32, Custom);
1038 // FIXME: these should be Legal but thats only for the case where
1039 // the index is constant. For now custom expand to deal with that.
1040 if (Subtarget->is64Bit()) {
1041 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2i64, Custom);
1042 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2i64, Custom);
1046 if (Subtarget->hasSSE2()) {
1047 setOperationAction(ISD::SRL, MVT::v8i16, Custom);
1048 setOperationAction(ISD::SRL, MVT::v16i8, Custom);
1050 setOperationAction(ISD::SHL, MVT::v8i16, Custom);
1051 setOperationAction(ISD::SHL, MVT::v16i8, Custom);
1053 setOperationAction(ISD::SRA, MVT::v8i16, Custom);
1054 setOperationAction(ISD::SRA, MVT::v16i8, Custom);
1056 if (Subtarget->hasInt256()) {
1057 setOperationAction(ISD::SRL, MVT::v2i64, Legal);
1058 setOperationAction(ISD::SRL, MVT::v4i32, Legal);
1060 setOperationAction(ISD::SHL, MVT::v2i64, Legal);
1061 setOperationAction(ISD::SHL, MVT::v4i32, Legal);
1063 setOperationAction(ISD::SRA, MVT::v4i32, Legal);
1065 setOperationAction(ISD::SRL, MVT::v2i64, Custom);
1066 setOperationAction(ISD::SRL, MVT::v4i32, Custom);
1068 setOperationAction(ISD::SHL, MVT::v2i64, Custom);
1069 setOperationAction(ISD::SHL, MVT::v4i32, Custom);
1071 setOperationAction(ISD::SRA, MVT::v4i32, Custom);
1073 setOperationAction(ISD::SDIV, MVT::v8i16, Custom);
1074 setOperationAction(ISD::SDIV, MVT::v4i32, Custom);
1077 if (!TM.Options.UseSoftFloat && Subtarget->hasFp256()) {
1078 addRegisterClass(MVT::v32i8, &X86::VR256RegClass);
1079 addRegisterClass(MVT::v16i16, &X86::VR256RegClass);
1080 addRegisterClass(MVT::v8i32, &X86::VR256RegClass);
1081 addRegisterClass(MVT::v8f32, &X86::VR256RegClass);
1082 addRegisterClass(MVT::v4i64, &X86::VR256RegClass);
1083 addRegisterClass(MVT::v4f64, &X86::VR256RegClass);
1085 setOperationAction(ISD::LOAD, MVT::v8f32, Legal);
1086 setOperationAction(ISD::LOAD, MVT::v4f64, Legal);
1087 setOperationAction(ISD::LOAD, MVT::v4i64, Legal);
1089 setOperationAction(ISD::FADD, MVT::v8f32, Legal);
1090 setOperationAction(ISD::FSUB, MVT::v8f32, Legal);
1091 setOperationAction(ISD::FMUL, MVT::v8f32, Legal);
1092 setOperationAction(ISD::FDIV, MVT::v8f32, Legal);
1093 setOperationAction(ISD::FSQRT, MVT::v8f32, Legal);
1094 setOperationAction(ISD::FFLOOR, MVT::v8f32, Legal);
1095 setOperationAction(ISD::FCEIL, MVT::v8f32, Legal);
1096 setOperationAction(ISD::FTRUNC, MVT::v8f32, Legal);
1097 setOperationAction(ISD::FRINT, MVT::v8f32, Legal);
1098 setOperationAction(ISD::FNEARBYINT, MVT::v8f32, Legal);
1099 setOperationAction(ISD::FNEG, MVT::v8f32, Custom);
1100 setOperationAction(ISD::FABS, MVT::v8f32, Custom);
1102 setOperationAction(ISD::FADD, MVT::v4f64, Legal);
1103 setOperationAction(ISD::FSUB, MVT::v4f64, Legal);
1104 setOperationAction(ISD::FMUL, MVT::v4f64, Legal);
1105 setOperationAction(ISD::FDIV, MVT::v4f64, Legal);
1106 setOperationAction(ISD::FSQRT, MVT::v4f64, Legal);
1107 setOperationAction(ISD::FFLOOR, MVT::v4f64, Legal);
1108 setOperationAction(ISD::FCEIL, MVT::v4f64, Legal);
1109 setOperationAction(ISD::FTRUNC, MVT::v4f64, Legal);
1110 setOperationAction(ISD::FRINT, MVT::v4f64, Legal);
1111 setOperationAction(ISD::FNEARBYINT, MVT::v4f64, Legal);
1112 setOperationAction(ISD::FNEG, MVT::v4f64, Custom);
1113 setOperationAction(ISD::FABS, MVT::v4f64, Custom);
1115 setOperationAction(ISD::TRUNCATE, MVT::v8i16, Custom);
1116 setOperationAction(ISD::TRUNCATE, MVT::v4i32, Custom);
1118 setOperationAction(ISD::FP_TO_SINT, MVT::v8i16, Custom);
1120 setOperationAction(ISD::FP_TO_SINT, MVT::v8i32, Legal);
1121 setOperationAction(ISD::SINT_TO_FP, MVT::v8i32, Legal);
1122 setOperationAction(ISD::FP_ROUND, MVT::v4f32, Legal);
1124 setOperationAction(ISD::ZERO_EXTEND, MVT::v8i32, Custom);
1125 setOperationAction(ISD::UINT_TO_FP, MVT::v8i8, Custom);
1126 setOperationAction(ISD::UINT_TO_FP, MVT::v8i16, Custom);
1128 setLoadExtAction(ISD::EXTLOAD, MVT::v4f32, Legal);
1130 setOperationAction(ISD::SRL, MVT::v16i16, Custom);
1131 setOperationAction(ISD::SRL, MVT::v32i8, Custom);
1133 setOperationAction(ISD::SHL, MVT::v16i16, Custom);
1134 setOperationAction(ISD::SHL, MVT::v32i8, Custom);
1136 setOperationAction(ISD::SRA, MVT::v16i16, Custom);
1137 setOperationAction(ISD::SRA, MVT::v32i8, Custom);
1139 setOperationAction(ISD::SDIV, MVT::v16i16, Custom);
1141 setOperationAction(ISD::SETCC, MVT::v32i8, Custom);
1142 setOperationAction(ISD::SETCC, MVT::v16i16, Custom);
1143 setOperationAction(ISD::SETCC, MVT::v8i32, Custom);
1144 setOperationAction(ISD::SETCC, MVT::v4i64, Custom);
1146 setOperationAction(ISD::SELECT, MVT::v4f64, Custom);
1147 setOperationAction(ISD::SELECT, MVT::v4i64, Custom);
1148 setOperationAction(ISD::SELECT, MVT::v8f32, Custom);
1150 setOperationAction(ISD::VSELECT, MVT::v4f64, Legal);
1151 setOperationAction(ISD::VSELECT, MVT::v4i64, Legal);
1152 setOperationAction(ISD::VSELECT, MVT::v8i32, Legal);
1153 setOperationAction(ISD::VSELECT, MVT::v8f32, Legal);
1155 setOperationAction(ISD::SIGN_EXTEND, MVT::v4i64, Custom);
1156 setOperationAction(ISD::SIGN_EXTEND, MVT::v8i32, Custom);
1157 setOperationAction(ISD::ZERO_EXTEND, MVT::v4i64, Custom);
1158 setOperationAction(ISD::ZERO_EXTEND, MVT::v8i32, Custom);
1159 setOperationAction(ISD::ANY_EXTEND, MVT::v4i64, Custom);
1160 setOperationAction(ISD::ANY_EXTEND, MVT::v8i32, Custom);
1162 if (Subtarget->hasFMA() || Subtarget->hasFMA4()) {
1163 setOperationAction(ISD::FMA, MVT::v8f32, Legal);
1164 setOperationAction(ISD::FMA, MVT::v4f64, Legal);
1165 setOperationAction(ISD::FMA, MVT::v4f32, Legal);
1166 setOperationAction(ISD::FMA, MVT::v2f64, Legal);
1167 setOperationAction(ISD::FMA, MVT::f32, Legal);
1168 setOperationAction(ISD::FMA, MVT::f64, Legal);
1171 if (Subtarget->hasInt256()) {
1172 setOperationAction(ISD::ADD, MVT::v4i64, Legal);
1173 setOperationAction(ISD::ADD, MVT::v8i32, Legal);
1174 setOperationAction(ISD::ADD, MVT::v16i16, Legal);
1175 setOperationAction(ISD::ADD, MVT::v32i8, Legal);
1177 setOperationAction(ISD::SUB, MVT::v4i64, Legal);
1178 setOperationAction(ISD::SUB, MVT::v8i32, Legal);
1179 setOperationAction(ISD::SUB, MVT::v16i16, Legal);
1180 setOperationAction(ISD::SUB, MVT::v32i8, Legal);
1182 setOperationAction(ISD::MUL, MVT::v4i64, Custom);
1183 setOperationAction(ISD::MUL, MVT::v8i32, Legal);
1184 setOperationAction(ISD::MUL, MVT::v16i16, Legal);
1185 // Don't lower v32i8 because there is no 128-bit byte mul
1187 setOperationAction(ISD::VSELECT, MVT::v32i8, Legal);
1189 setOperationAction(ISD::SRL, MVT::v4i64, Legal);
1190 setOperationAction(ISD::SRL, MVT::v8i32, Legal);
1192 setOperationAction(ISD::SHL, MVT::v4i64, Legal);
1193 setOperationAction(ISD::SHL, MVT::v8i32, Legal);
1195 setOperationAction(ISD::SRA, MVT::v8i32, Legal);
1197 setOperationAction(ISD::SDIV, MVT::v8i32, Custom);
1199 setOperationAction(ISD::ADD, MVT::v4i64, Custom);
1200 setOperationAction(ISD::ADD, MVT::v8i32, Custom);
1201 setOperationAction(ISD::ADD, MVT::v16i16, Custom);
1202 setOperationAction(ISD::ADD, MVT::v32i8, Custom);
1204 setOperationAction(ISD::SUB, MVT::v4i64, Custom);
1205 setOperationAction(ISD::SUB, MVT::v8i32, Custom);
1206 setOperationAction(ISD::SUB, MVT::v16i16, Custom);
1207 setOperationAction(ISD::SUB, MVT::v32i8, Custom);
1209 setOperationAction(ISD::MUL, MVT::v4i64, Custom);
1210 setOperationAction(ISD::MUL, MVT::v8i32, Custom);
1211 setOperationAction(ISD::MUL, MVT::v16i16, Custom);
1212 // Don't lower v32i8 because there is no 128-bit byte mul
1214 setOperationAction(ISD::SRL, MVT::v4i64, Custom);
1215 setOperationAction(ISD::SRL, MVT::v8i32, Custom);
1217 setOperationAction(ISD::SHL, MVT::v4i64, Custom);
1218 setOperationAction(ISD::SHL, MVT::v8i32, Custom);
1220 setOperationAction(ISD::SRA, MVT::v8i32, Custom);
1223 // Custom lower several nodes for 256-bit types.
1224 for (int i = MVT::FIRST_VECTOR_VALUETYPE;
1225 i <= MVT::LAST_VECTOR_VALUETYPE; ++i) {
1226 MVT VT = (MVT::SimpleValueType)i;
1228 // Extract subvector is special because the value type
1229 // (result) is 128-bit but the source is 256-bit wide.
1230 if (VT.is128BitVector())
1231 setOperationAction(ISD::EXTRACT_SUBVECTOR, VT, Custom);
1233 // Do not attempt to custom lower other non-256-bit vectors
1234 if (!VT.is256BitVector())
1237 setOperationAction(ISD::BUILD_VECTOR, VT, Custom);
1238 setOperationAction(ISD::VECTOR_SHUFFLE, VT, Custom);
1239 setOperationAction(ISD::INSERT_VECTOR_ELT, VT, Custom);
1240 setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Custom);
1241 setOperationAction(ISD::SCALAR_TO_VECTOR, VT, Custom);
1242 setOperationAction(ISD::INSERT_SUBVECTOR, VT, Custom);
1243 setOperationAction(ISD::CONCAT_VECTORS, VT, Custom);
1246 // Promote v32i8, v16i16, v8i32 select, and, or, xor to v4i64.
1247 for (int i = MVT::v32i8; i != MVT::v4i64; ++i) {
1248 MVT VT = (MVT::SimpleValueType)i;
1250 // Do not attempt to promote non-256-bit vectors
1251 if (!VT.is256BitVector())
1254 setOperationAction(ISD::AND, VT, Promote);
1255 AddPromotedToType (ISD::AND, VT, MVT::v4i64);
1256 setOperationAction(ISD::OR, VT, Promote);
1257 AddPromotedToType (ISD::OR, VT, MVT::v4i64);
1258 setOperationAction(ISD::XOR, VT, Promote);
1259 AddPromotedToType (ISD::XOR, VT, MVT::v4i64);
1260 setOperationAction(ISD::LOAD, VT, Promote);
1261 AddPromotedToType (ISD::LOAD, VT, MVT::v4i64);
1262 setOperationAction(ISD::SELECT, VT, Promote);
1263 AddPromotedToType (ISD::SELECT, VT, MVT::v4i64);
1267 // SIGN_EXTEND_INREGs are evaluated by the extend type. Handle the expansion
1268 // of this type with custom code.
1269 for (int VT = MVT::FIRST_VECTOR_VALUETYPE;
1270 VT != MVT::LAST_VECTOR_VALUETYPE; VT++) {
1271 setOperationAction(ISD::SIGN_EXTEND_INREG, (MVT::SimpleValueType)VT,
1275 // We want to custom lower some of our intrinsics.
1276 setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
1277 setOperationAction(ISD::INTRINSIC_W_CHAIN, MVT::Other, Custom);
1279 // Only custom-lower 64-bit SADDO and friends on 64-bit because we don't
1280 // handle type legalization for these operations here.
1282 // FIXME: We really should do custom legalization for addition and
1283 // subtraction on x86-32 once PR3203 is fixed. We really can't do much better
1284 // than generic legalization for 64-bit multiplication-with-overflow, though.
1285 for (unsigned i = 0, e = 3+Subtarget->is64Bit(); i != e; ++i) {
1286 // Add/Sub/Mul with overflow operations are custom lowered.
1288 setOperationAction(ISD::SADDO, VT, Custom);
1289 setOperationAction(ISD::UADDO, VT, Custom);
1290 setOperationAction(ISD::SSUBO, VT, Custom);
1291 setOperationAction(ISD::USUBO, VT, Custom);
1292 setOperationAction(ISD::SMULO, VT, Custom);
1293 setOperationAction(ISD::UMULO, VT, Custom);
1296 // There are no 8-bit 3-address imul/mul instructions
1297 setOperationAction(ISD::SMULO, MVT::i8, Expand);
1298 setOperationAction(ISD::UMULO, MVT::i8, Expand);
1300 if (!Subtarget->is64Bit()) {
1301 // These libcalls are not available in 32-bit.
1302 setLibcallName(RTLIB::SHL_I128, 0);
1303 setLibcallName(RTLIB::SRL_I128, 0);
1304 setLibcallName(RTLIB::SRA_I128, 0);
1307 // Combine sin / cos into one node or libcall if possible.
1308 if (Subtarget->hasSinCos()) {
1309 setLibcallName(RTLIB::SINCOS_F32, "sincosf");
1310 setLibcallName(RTLIB::SINCOS_F64, "sincos");
1311 if (Subtarget->isTargetDarwin()) {
1312 // For MacOSX, we don't want to the normal expansion of a libcall to
1313 // sincos. We want to issue a libcall to __sincos_stret to avoid memory
1315 setOperationAction(ISD::FSINCOS, MVT::f64, Custom);
1316 setOperationAction(ISD::FSINCOS, MVT::f32, Custom);
1320 // We have target-specific dag combine patterns for the following nodes:
1321 setTargetDAGCombine(ISD::VECTOR_SHUFFLE);
1322 setTargetDAGCombine(ISD::EXTRACT_VECTOR_ELT);
1323 setTargetDAGCombine(ISD::VSELECT);
1324 setTargetDAGCombine(ISD::SELECT);
1325 setTargetDAGCombine(ISD::SHL);
1326 setTargetDAGCombine(ISD::SRA);
1327 setTargetDAGCombine(ISD::SRL);
1328 setTargetDAGCombine(ISD::OR);
1329 setTargetDAGCombine(ISD::AND);
1330 setTargetDAGCombine(ISD::ADD);
1331 setTargetDAGCombine(ISD::FADD);
1332 setTargetDAGCombine(ISD::FSUB);
1333 setTargetDAGCombine(ISD::FMA);
1334 setTargetDAGCombine(ISD::SUB);
1335 setTargetDAGCombine(ISD::LOAD);
1336 setTargetDAGCombine(ISD::STORE);
1337 setTargetDAGCombine(ISD::ZERO_EXTEND);
1338 setTargetDAGCombine(ISD::ANY_EXTEND);
1339 setTargetDAGCombine(ISD::SIGN_EXTEND);
1340 setTargetDAGCombine(ISD::SIGN_EXTEND_INREG);
1341 setTargetDAGCombine(ISD::TRUNCATE);
1342 setTargetDAGCombine(ISD::SINT_TO_FP);
1343 setTargetDAGCombine(ISD::SETCC);
1344 if (Subtarget->is64Bit())
1345 setTargetDAGCombine(ISD::MUL);
1346 setTargetDAGCombine(ISD::XOR);
1348 computeRegisterProperties();
1350 // On Darwin, -Os means optimize for size without hurting performance,
1351 // do not reduce the limit.
1352 MaxStoresPerMemset = 16; // For @llvm.memset -> sequence of stores
1353 MaxStoresPerMemsetOptSize = Subtarget->isTargetDarwin() ? 16 : 8;
1354 MaxStoresPerMemcpy = 8; // For @llvm.memcpy -> sequence of stores
1355 MaxStoresPerMemcpyOptSize = Subtarget->isTargetDarwin() ? 8 : 4;
1356 MaxStoresPerMemmove = 8; // For @llvm.memmove -> sequence of stores
1357 MaxStoresPerMemmoveOptSize = Subtarget->isTargetDarwin() ? 8 : 4;
1358 setPrefLoopAlignment(4); // 2^4 bytes.
1359 BenefitFromCodePlacementOpt = true;
1361 // Predictable cmov don't hurt on atom because it's in-order.
1362 PredictableSelectIsExpensive = !Subtarget->isAtom();
1364 setPrefFunctionAlignment(4); // 2^4 bytes.
1367 EVT X86TargetLowering::getSetCCResultType(EVT VT) const {
1368 if (!VT.isVector()) return MVT::i8;
1369 return VT.changeVectorElementTypeToInteger();
1372 /// getMaxByValAlign - Helper for getByValTypeAlignment to determine
1373 /// the desired ByVal argument alignment.
1374 static void getMaxByValAlign(Type *Ty, unsigned &MaxAlign) {
1377 if (VectorType *VTy = dyn_cast<VectorType>(Ty)) {
1378 if (VTy->getBitWidth() == 128)
1380 } else if (ArrayType *ATy = dyn_cast<ArrayType>(Ty)) {
1381 unsigned EltAlign = 0;
1382 getMaxByValAlign(ATy->getElementType(), EltAlign);
1383 if (EltAlign > MaxAlign)
1384 MaxAlign = EltAlign;
1385 } else if (StructType *STy = dyn_cast<StructType>(Ty)) {
1386 for (unsigned i = 0, e = STy->getNumElements(); i != e; ++i) {
1387 unsigned EltAlign = 0;
1388 getMaxByValAlign(STy->getElementType(i), EltAlign);
1389 if (EltAlign > MaxAlign)
1390 MaxAlign = EltAlign;
1397 /// getByValTypeAlignment - Return the desired alignment for ByVal aggregate
1398 /// function arguments in the caller parameter area. For X86, aggregates
1399 /// that contain SSE vectors are placed at 16-byte boundaries while the rest
1400 /// are at 4-byte boundaries.
1401 unsigned X86TargetLowering::getByValTypeAlignment(Type *Ty) const {
1402 if (Subtarget->is64Bit()) {
1403 // Max of 8 and alignment of type.
1404 unsigned TyAlign = TD->getABITypeAlignment(Ty);
1411 if (Subtarget->hasSSE1())
1412 getMaxByValAlign(Ty, Align);
1416 /// getOptimalMemOpType - Returns the target specific optimal type for load
1417 /// and store operations as a result of memset, memcpy, and memmove
1418 /// lowering. If DstAlign is zero that means it's safe to destination
1419 /// alignment can satisfy any constraint. Similarly if SrcAlign is zero it
1420 /// means there isn't a need to check it against alignment requirement,
1421 /// probably because the source does not need to be loaded. If 'IsMemset' is
1422 /// true, that means it's expanding a memset. If 'ZeroMemset' is true, that
1423 /// means it's a memset of zero. 'MemcpyStrSrc' indicates whether the memcpy
1424 /// source is constant so it does not need to be loaded.
1425 /// It returns EVT::Other if the type should be determined using generic
1426 /// target-independent logic.
1428 X86TargetLowering::getOptimalMemOpType(uint64_t Size,
1429 unsigned DstAlign, unsigned SrcAlign,
1430 bool IsMemset, bool ZeroMemset,
1432 MachineFunction &MF) const {
1433 const Function *F = MF.getFunction();
1434 if ((!IsMemset || ZeroMemset) &&
1435 !F->getAttributes().hasAttribute(AttributeSet::FunctionIndex,
1436 Attribute::NoImplicitFloat)) {
1438 (Subtarget->isUnalignedMemAccessFast() ||
1439 ((DstAlign == 0 || DstAlign >= 16) &&
1440 (SrcAlign == 0 || SrcAlign >= 16)))) {
1442 if (Subtarget->hasInt256())
1444 if (Subtarget->hasFp256())
1447 if (Subtarget->hasSSE2())
1449 if (Subtarget->hasSSE1())
1451 } else if (!MemcpyStrSrc && Size >= 8 &&
1452 !Subtarget->is64Bit() &&
1453 Subtarget->hasSSE2()) {
1454 // Do not use f64 to lower memcpy if source is string constant. It's
1455 // better to use i32 to avoid the loads.
1459 if (Subtarget->is64Bit() && Size >= 8)
1464 bool X86TargetLowering::isSafeMemOpType(MVT VT) const {
1466 return X86ScalarSSEf32;
1467 else if (VT == MVT::f64)
1468 return X86ScalarSSEf64;
1473 X86TargetLowering::allowsUnalignedMemoryAccesses(EVT VT, bool *Fast) const {
1475 *Fast = Subtarget->isUnalignedMemAccessFast();
1479 /// getJumpTableEncoding - Return the entry encoding for a jump table in the
1480 /// current function. The returned value is a member of the
1481 /// MachineJumpTableInfo::JTEntryKind enum.
1482 unsigned X86TargetLowering::getJumpTableEncoding() const {
1483 // In GOT pic mode, each entry in the jump table is emitted as a @GOTOFF
1485 if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
1486 Subtarget->isPICStyleGOT())
1487 return MachineJumpTableInfo::EK_Custom32;
1489 // Otherwise, use the normal jump table encoding heuristics.
1490 return TargetLowering::getJumpTableEncoding();
1494 X86TargetLowering::LowerCustomJumpTableEntry(const MachineJumpTableInfo *MJTI,
1495 const MachineBasicBlock *MBB,
1496 unsigned uid,MCContext &Ctx) const{
1497 assert(getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
1498 Subtarget->isPICStyleGOT());
1499 // In 32-bit ELF systems, our jump table entries are formed with @GOTOFF
1501 return MCSymbolRefExpr::Create(MBB->getSymbol(),
1502 MCSymbolRefExpr::VK_GOTOFF, Ctx);
1505 /// getPICJumpTableRelocaBase - Returns relocation base for the given PIC
1507 SDValue X86TargetLowering::getPICJumpTableRelocBase(SDValue Table,
1508 SelectionDAG &DAG) const {
1509 if (!Subtarget->is64Bit())
1510 // This doesn't have DebugLoc associated with it, but is not really the
1511 // same as a Register.
1512 return DAG.getNode(X86ISD::GlobalBaseReg, DebugLoc(), getPointerTy());
1516 /// getPICJumpTableRelocBaseExpr - This returns the relocation base for the
1517 /// given PIC jumptable, the same as getPICJumpTableRelocBase, but as an
1519 const MCExpr *X86TargetLowering::
1520 getPICJumpTableRelocBaseExpr(const MachineFunction *MF, unsigned JTI,
1521 MCContext &Ctx) const {
1522 // X86-64 uses RIP relative addressing based on the jump table label.
1523 if (Subtarget->isPICStyleRIPRel())
1524 return TargetLowering::getPICJumpTableRelocBaseExpr(MF, JTI, Ctx);
1526 // Otherwise, the reference is relative to the PIC base.
1527 return MCSymbolRefExpr::Create(MF->getPICBaseSymbol(), Ctx);
1530 // FIXME: Why this routine is here? Move to RegInfo!
1531 std::pair<const TargetRegisterClass*, uint8_t>
1532 X86TargetLowering::findRepresentativeClass(MVT VT) const{
1533 const TargetRegisterClass *RRC = 0;
1535 switch (VT.SimpleTy) {
1537 return TargetLowering::findRepresentativeClass(VT);
1538 case MVT::i8: case MVT::i16: case MVT::i32: case MVT::i64:
1539 RRC = Subtarget->is64Bit() ?
1540 (const TargetRegisterClass*)&X86::GR64RegClass :
1541 (const TargetRegisterClass*)&X86::GR32RegClass;
1544 RRC = &X86::VR64RegClass;
1546 case MVT::f32: case MVT::f64:
1547 case MVT::v16i8: case MVT::v8i16: case MVT::v4i32: case MVT::v2i64:
1548 case MVT::v4f32: case MVT::v2f64:
1549 case MVT::v32i8: case MVT::v8i32: case MVT::v4i64: case MVT::v8f32:
1551 RRC = &X86::VR128RegClass;
1554 return std::make_pair(RRC, Cost);
1557 bool X86TargetLowering::getStackCookieLocation(unsigned &AddressSpace,
1558 unsigned &Offset) const {
1559 if (!Subtarget->isTargetLinux())
1562 if (Subtarget->is64Bit()) {
1563 // %fs:0x28, unless we're using a Kernel code model, in which case it's %gs:
1565 if (getTargetMachine().getCodeModel() == CodeModel::Kernel)
1577 //===----------------------------------------------------------------------===//
1578 // Return Value Calling Convention Implementation
1579 //===----------------------------------------------------------------------===//
1581 #include "X86GenCallingConv.inc"
1584 X86TargetLowering::CanLowerReturn(CallingConv::ID CallConv,
1585 MachineFunction &MF, bool isVarArg,
1586 const SmallVectorImpl<ISD::OutputArg> &Outs,
1587 LLVMContext &Context) const {
1588 SmallVector<CCValAssign, 16> RVLocs;
1589 CCState CCInfo(CallConv, isVarArg, MF, getTargetMachine(),
1591 return CCInfo.CheckReturn(Outs, RetCC_X86);
1595 X86TargetLowering::LowerReturn(SDValue Chain,
1596 CallingConv::ID CallConv, bool isVarArg,
1597 const SmallVectorImpl<ISD::OutputArg> &Outs,
1598 const SmallVectorImpl<SDValue> &OutVals,
1599 DebugLoc dl, SelectionDAG &DAG) const {
1600 MachineFunction &MF = DAG.getMachineFunction();
1601 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
1603 SmallVector<CCValAssign, 16> RVLocs;
1604 CCState CCInfo(CallConv, isVarArg, MF, getTargetMachine(),
1605 RVLocs, *DAG.getContext());
1606 CCInfo.AnalyzeReturn(Outs, RetCC_X86);
1609 SmallVector<SDValue, 6> RetOps;
1610 RetOps.push_back(Chain); // Operand #0 = Chain (updated below)
1611 // Operand #1 = Bytes To Pop
1612 RetOps.push_back(DAG.getTargetConstant(FuncInfo->getBytesToPopOnReturn(),
1615 // Copy the result values into the output registers.
1616 for (unsigned i = 0; i != RVLocs.size(); ++i) {
1617 CCValAssign &VA = RVLocs[i];
1618 assert(VA.isRegLoc() && "Can only return in registers!");
1619 SDValue ValToCopy = OutVals[i];
1620 EVT ValVT = ValToCopy.getValueType();
1622 // Promote values to the appropriate types
1623 if (VA.getLocInfo() == CCValAssign::SExt)
1624 ValToCopy = DAG.getNode(ISD::SIGN_EXTEND, dl, VA.getLocVT(), ValToCopy);
1625 else if (VA.getLocInfo() == CCValAssign::ZExt)
1626 ValToCopy = DAG.getNode(ISD::ZERO_EXTEND, dl, VA.getLocVT(), ValToCopy);
1627 else if (VA.getLocInfo() == CCValAssign::AExt)
1628 ValToCopy = DAG.getNode(ISD::ANY_EXTEND, dl, VA.getLocVT(), ValToCopy);
1629 else if (VA.getLocInfo() == CCValAssign::BCvt)
1630 ValToCopy = DAG.getNode(ISD::BITCAST, dl, VA.getLocVT(), ValToCopy);
1632 // If this is x86-64, and we disabled SSE, we can't return FP values,
1633 // or SSE or MMX vectors.
1634 if ((ValVT == MVT::f32 || ValVT == MVT::f64 ||
1635 VA.getLocReg() == X86::XMM0 || VA.getLocReg() == X86::XMM1) &&
1636 (Subtarget->is64Bit() && !Subtarget->hasSSE1())) {
1637 report_fatal_error("SSE register return with SSE disabled");
1639 // Likewise we can't return F64 values with SSE1 only. gcc does so, but
1640 // llvm-gcc has never done it right and no one has noticed, so this
1641 // should be OK for now.
1642 if (ValVT == MVT::f64 &&
1643 (Subtarget->is64Bit() && !Subtarget->hasSSE2()))
1644 report_fatal_error("SSE2 register return with SSE2 disabled");
1646 // Returns in ST0/ST1 are handled specially: these are pushed as operands to
1647 // the RET instruction and handled by the FP Stackifier.
1648 if (VA.getLocReg() == X86::ST0 ||
1649 VA.getLocReg() == X86::ST1) {
1650 // If this is a copy from an xmm register to ST(0), use an FPExtend to
1651 // change the value to the FP stack register class.
1652 if (isScalarFPTypeInSSEReg(VA.getValVT()))
1653 ValToCopy = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f80, ValToCopy);
1654 RetOps.push_back(ValToCopy);
1655 // Don't emit a copytoreg.
1659 // 64-bit vector (MMX) values are returned in XMM0 / XMM1 except for v1i64
1660 // which is returned in RAX / RDX.
1661 if (Subtarget->is64Bit()) {
1662 if (ValVT == MVT::x86mmx) {
1663 if (VA.getLocReg() == X86::XMM0 || VA.getLocReg() == X86::XMM1) {
1664 ValToCopy = DAG.getNode(ISD::BITCAST, dl, MVT::i64, ValToCopy);
1665 ValToCopy = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2i64,
1667 // If we don't have SSE2 available, convert to v4f32 so the generated
1668 // register is legal.
1669 if (!Subtarget->hasSSE2())
1670 ValToCopy = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32,ValToCopy);
1675 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), ValToCopy, Flag);
1676 Flag = Chain.getValue(1);
1677 RetOps.push_back(DAG.getRegister(VA.getLocReg(), VA.getLocVT()));
1680 // The x86-64 ABIs require that for returning structs by value we copy
1681 // the sret argument into %rax/%eax (depending on ABI) for the return.
1682 // We saved the argument into a virtual register in the entry block,
1683 // so now we copy the value out and into %rax/%eax.
1684 if (Subtarget->is64Bit() &&
1685 DAG.getMachineFunction().getFunction()->hasStructRetAttr()) {
1686 MachineFunction &MF = DAG.getMachineFunction();
1687 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
1688 unsigned Reg = FuncInfo->getSRetReturnReg();
1690 "SRetReturnReg should have been set in LowerFormalArguments().");
1691 SDValue Val = DAG.getCopyFromReg(Chain, dl, Reg, getPointerTy());
1693 unsigned RetValReg = Subtarget->isTarget64BitILP32() ? X86::EAX : X86::RAX;
1694 Chain = DAG.getCopyToReg(Chain, dl, RetValReg, Val, Flag);
1695 Flag = Chain.getValue(1);
1697 // RAX/EAX now acts like a return value.
1698 RetOps.push_back(DAG.getRegister(RetValReg, MVT::i64));
1701 RetOps[0] = Chain; // Update chain.
1703 // Add the flag if we have it.
1705 RetOps.push_back(Flag);
1707 return DAG.getNode(X86ISD::RET_FLAG, dl,
1708 MVT::Other, &RetOps[0], RetOps.size());
1711 bool X86TargetLowering::isUsedByReturnOnly(SDNode *N, SDValue &Chain) const {
1712 if (N->getNumValues() != 1)
1714 if (!N->hasNUsesOfValue(1, 0))
1717 SDValue TCChain = Chain;
1718 SDNode *Copy = *N->use_begin();
1719 if (Copy->getOpcode() == ISD::CopyToReg) {
1720 // If the copy has a glue operand, we conservatively assume it isn't safe to
1721 // perform a tail call.
1722 if (Copy->getOperand(Copy->getNumOperands()-1).getValueType() == MVT::Glue)
1724 TCChain = Copy->getOperand(0);
1725 } else if (Copy->getOpcode() != ISD::FP_EXTEND)
1728 bool HasRet = false;
1729 for (SDNode::use_iterator UI = Copy->use_begin(), UE = Copy->use_end();
1731 if (UI->getOpcode() != X86ISD::RET_FLAG)
1744 X86TargetLowering::getTypeForExtArgOrReturn(MVT VT,
1745 ISD::NodeType ExtendKind) const {
1747 // TODO: Is this also valid on 32-bit?
1748 if (Subtarget->is64Bit() && VT == MVT::i1 && ExtendKind == ISD::ZERO_EXTEND)
1749 ReturnMVT = MVT::i8;
1751 ReturnMVT = MVT::i32;
1753 MVT MinVT = getRegisterType(ReturnMVT);
1754 return VT.bitsLT(MinVT) ? MinVT : VT;
1757 /// LowerCallResult - Lower the result values of a call into the
1758 /// appropriate copies out of appropriate physical registers.
1761 X86TargetLowering::LowerCallResult(SDValue Chain, SDValue InFlag,
1762 CallingConv::ID CallConv, bool isVarArg,
1763 const SmallVectorImpl<ISD::InputArg> &Ins,
1764 DebugLoc dl, SelectionDAG &DAG,
1765 SmallVectorImpl<SDValue> &InVals) const {
1767 // Assign locations to each value returned by this call.
1768 SmallVector<CCValAssign, 16> RVLocs;
1769 bool Is64Bit = Subtarget->is64Bit();
1770 CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
1771 getTargetMachine(), RVLocs, *DAG.getContext());
1772 CCInfo.AnalyzeCallResult(Ins, RetCC_X86);
1774 // Copy all of the result registers out of their specified physreg.
1775 for (unsigned i = 0, e = RVLocs.size(); i != e; ++i) {
1776 CCValAssign &VA = RVLocs[i];
1777 EVT CopyVT = VA.getValVT();
1779 // If this is x86-64, and we disabled SSE, we can't return FP values
1780 if ((CopyVT == MVT::f32 || CopyVT == MVT::f64) &&
1781 ((Is64Bit || Ins[i].Flags.isInReg()) && !Subtarget->hasSSE1())) {
1782 report_fatal_error("SSE register return with SSE disabled");
1787 // If this is a call to a function that returns an fp value on the floating
1788 // point stack, we must guarantee the value is popped from the stack, so
1789 // a CopyFromReg is not good enough - the copy instruction may be eliminated
1790 // if the return value is not used. We use the FpPOP_RETVAL instruction
1792 if (VA.getLocReg() == X86::ST0 || VA.getLocReg() == X86::ST1) {
1793 // If we prefer to use the value in xmm registers, copy it out as f80 and
1794 // use a truncate to move it from fp stack reg to xmm reg.
1795 if (isScalarFPTypeInSSEReg(VA.getValVT())) CopyVT = MVT::f80;
1796 SDValue Ops[] = { Chain, InFlag };
1797 Chain = SDValue(DAG.getMachineNode(X86::FpPOP_RETVAL, dl, CopyVT,
1798 MVT::Other, MVT::Glue, Ops, 2), 1);
1799 Val = Chain.getValue(0);
1801 // Round the f80 to the right size, which also moves it to the appropriate
1803 if (CopyVT != VA.getValVT())
1804 Val = DAG.getNode(ISD::FP_ROUND, dl, VA.getValVT(), Val,
1805 // This truncation won't change the value.
1806 DAG.getIntPtrConstant(1));
1808 Chain = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(),
1809 CopyVT, InFlag).getValue(1);
1810 Val = Chain.getValue(0);
1812 InFlag = Chain.getValue(2);
1813 InVals.push_back(Val);
1819 //===----------------------------------------------------------------------===//
1820 // C & StdCall & Fast Calling Convention implementation
1821 //===----------------------------------------------------------------------===//
1822 // StdCall calling convention seems to be standard for many Windows' API
1823 // routines and around. It differs from C calling convention just a little:
1824 // callee should clean up the stack, not caller. Symbols should be also
1825 // decorated in some fancy way :) It doesn't support any vector arguments.
1826 // For info on fast calling convention see Fast Calling Convention (tail call)
1827 // implementation LowerX86_32FastCCCallTo.
1829 /// CallIsStructReturn - Determines whether a call uses struct return
1831 enum StructReturnType {
1836 static StructReturnType
1837 callIsStructReturn(const SmallVectorImpl<ISD::OutputArg> &Outs) {
1839 return NotStructReturn;
1841 const ISD::ArgFlagsTy &Flags = Outs[0].Flags;
1842 if (!Flags.isSRet())
1843 return NotStructReturn;
1844 if (Flags.isInReg())
1845 return RegStructReturn;
1846 return StackStructReturn;
1849 /// ArgsAreStructReturn - Determines whether a function uses struct
1850 /// return semantics.
1851 static StructReturnType
1852 argsAreStructReturn(const SmallVectorImpl<ISD::InputArg> &Ins) {
1854 return NotStructReturn;
1856 const ISD::ArgFlagsTy &Flags = Ins[0].Flags;
1857 if (!Flags.isSRet())
1858 return NotStructReturn;
1859 if (Flags.isInReg())
1860 return RegStructReturn;
1861 return StackStructReturn;
1864 /// CreateCopyOfByValArgument - Make a copy of an aggregate at address specified
1865 /// by "Src" to address "Dst" with size and alignment information specified by
1866 /// the specific parameter attribute. The copy will be passed as a byval
1867 /// function parameter.
1869 CreateCopyOfByValArgument(SDValue Src, SDValue Dst, SDValue Chain,
1870 ISD::ArgFlagsTy Flags, SelectionDAG &DAG,
1872 SDValue SizeNode = DAG.getConstant(Flags.getByValSize(), MVT::i32);
1874 return DAG.getMemcpy(Chain, dl, Dst, Src, SizeNode, Flags.getByValAlign(),
1875 /*isVolatile*/false, /*AlwaysInline=*/true,
1876 MachinePointerInfo(), MachinePointerInfo());
1879 /// IsTailCallConvention - Return true if the calling convention is one that
1880 /// supports tail call optimization.
1881 static bool IsTailCallConvention(CallingConv::ID CC) {
1882 return (CC == CallingConv::Fast || CC == CallingConv::GHC ||
1883 CC == CallingConv::HiPE);
1886 bool X86TargetLowering::mayBeEmittedAsTailCall(CallInst *CI) const {
1887 if (!CI->isTailCall() || getTargetMachine().Options.DisableTailCalls)
1891 CallingConv::ID CalleeCC = CS.getCallingConv();
1892 if (!IsTailCallConvention(CalleeCC) && CalleeCC != CallingConv::C)
1898 /// FuncIsMadeTailCallSafe - Return true if the function is being made into
1899 /// a tailcall target by changing its ABI.
1900 static bool FuncIsMadeTailCallSafe(CallingConv::ID CC,
1901 bool GuaranteedTailCallOpt) {
1902 return GuaranteedTailCallOpt && IsTailCallConvention(CC);
1906 X86TargetLowering::LowerMemArgument(SDValue Chain,
1907 CallingConv::ID CallConv,
1908 const SmallVectorImpl<ISD::InputArg> &Ins,
1909 DebugLoc dl, SelectionDAG &DAG,
1910 const CCValAssign &VA,
1911 MachineFrameInfo *MFI,
1913 // Create the nodes corresponding to a load from this parameter slot.
1914 ISD::ArgFlagsTy Flags = Ins[i].Flags;
1915 bool AlwaysUseMutable = FuncIsMadeTailCallSafe(CallConv,
1916 getTargetMachine().Options.GuaranteedTailCallOpt);
1917 bool isImmutable = !AlwaysUseMutable && !Flags.isByVal();
1920 // If value is passed by pointer we have address passed instead of the value
1922 if (VA.getLocInfo() == CCValAssign::Indirect)
1923 ValVT = VA.getLocVT();
1925 ValVT = VA.getValVT();
1927 // FIXME: For now, all byval parameter objects are marked mutable. This can be
1928 // changed with more analysis.
1929 // In case of tail call optimization mark all arguments mutable. Since they
1930 // could be overwritten by lowering of arguments in case of a tail call.
1931 if (Flags.isByVal()) {
1932 unsigned Bytes = Flags.getByValSize();
1933 if (Bytes == 0) Bytes = 1; // Don't create zero-sized stack objects.
1934 int FI = MFI->CreateFixedObject(Bytes, VA.getLocMemOffset(), isImmutable);
1935 return DAG.getFrameIndex(FI, getPointerTy());
1937 int FI = MFI->CreateFixedObject(ValVT.getSizeInBits()/8,
1938 VA.getLocMemOffset(), isImmutable);
1939 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
1940 return DAG.getLoad(ValVT, dl, Chain, FIN,
1941 MachinePointerInfo::getFixedStack(FI),
1942 false, false, false, 0);
1947 X86TargetLowering::LowerFormalArguments(SDValue Chain,
1948 CallingConv::ID CallConv,
1950 const SmallVectorImpl<ISD::InputArg> &Ins,
1953 SmallVectorImpl<SDValue> &InVals)
1955 MachineFunction &MF = DAG.getMachineFunction();
1956 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
1958 const Function* Fn = MF.getFunction();
1959 if (Fn->hasExternalLinkage() &&
1960 Subtarget->isTargetCygMing() &&
1961 Fn->getName() == "main")
1962 FuncInfo->setForceFramePointer(true);
1964 MachineFrameInfo *MFI = MF.getFrameInfo();
1965 bool Is64Bit = Subtarget->is64Bit();
1966 bool IsWindows = Subtarget->isTargetWindows();
1967 bool IsWin64 = Subtarget->isTargetWin64();
1969 assert(!(isVarArg && IsTailCallConvention(CallConv)) &&
1970 "Var args not supported with calling convention fastcc, ghc or hipe");
1972 // Assign locations to all of the incoming arguments.
1973 SmallVector<CCValAssign, 16> ArgLocs;
1974 CCState CCInfo(CallConv, isVarArg, MF, getTargetMachine(),
1975 ArgLocs, *DAG.getContext());
1977 // Allocate shadow area for Win64
1979 CCInfo.AllocateStack(32, 8);
1982 CCInfo.AnalyzeFormalArguments(Ins, CC_X86);
1984 unsigned LastVal = ~0U;
1986 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
1987 CCValAssign &VA = ArgLocs[i];
1988 // TODO: If an arg is passed in two places (e.g. reg and stack), skip later
1990 assert(VA.getValNo() != LastVal &&
1991 "Don't support value assigned to multiple locs yet");
1993 LastVal = VA.getValNo();
1995 if (VA.isRegLoc()) {
1996 EVT RegVT = VA.getLocVT();
1997 const TargetRegisterClass *RC;
1998 if (RegVT == MVT::i32)
1999 RC = &X86::GR32RegClass;
2000 else if (Is64Bit && RegVT == MVT::i64)
2001 RC = &X86::GR64RegClass;
2002 else if (RegVT == MVT::f32)
2003 RC = &X86::FR32RegClass;
2004 else if (RegVT == MVT::f64)
2005 RC = &X86::FR64RegClass;
2006 else if (RegVT.is256BitVector())
2007 RC = &X86::VR256RegClass;
2008 else if (RegVT.is128BitVector())
2009 RC = &X86::VR128RegClass;
2010 else if (RegVT == MVT::x86mmx)
2011 RC = &X86::VR64RegClass;
2013 llvm_unreachable("Unknown argument type!");
2015 unsigned Reg = MF.addLiveIn(VA.getLocReg(), RC);
2016 ArgValue = DAG.getCopyFromReg(Chain, dl, Reg, RegVT);
2018 // If this is an 8 or 16-bit value, it is really passed promoted to 32
2019 // bits. Insert an assert[sz]ext to capture this, then truncate to the
2021 if (VA.getLocInfo() == CCValAssign::SExt)
2022 ArgValue = DAG.getNode(ISD::AssertSext, dl, RegVT, ArgValue,
2023 DAG.getValueType(VA.getValVT()));
2024 else if (VA.getLocInfo() == CCValAssign::ZExt)
2025 ArgValue = DAG.getNode(ISD::AssertZext, dl, RegVT, ArgValue,
2026 DAG.getValueType(VA.getValVT()));
2027 else if (VA.getLocInfo() == CCValAssign::BCvt)
2028 ArgValue = DAG.getNode(ISD::BITCAST, dl, VA.getValVT(), ArgValue);
2030 if (VA.isExtInLoc()) {
2031 // Handle MMX values passed in XMM regs.
2032 if (RegVT.isVector())
2033 ArgValue = DAG.getNode(X86ISD::MOVDQ2Q, dl, VA.getValVT(), ArgValue);
2035 ArgValue = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), ArgValue);
2038 assert(VA.isMemLoc());
2039 ArgValue = LowerMemArgument(Chain, CallConv, Ins, dl, DAG, VA, MFI, i);
2042 // If value is passed via pointer - do a load.
2043 if (VA.getLocInfo() == CCValAssign::Indirect)
2044 ArgValue = DAG.getLoad(VA.getValVT(), dl, Chain, ArgValue,
2045 MachinePointerInfo(), false, false, false, 0);
2047 InVals.push_back(ArgValue);
2050 // The x86-64 ABIs require that for returning structs by value we copy
2051 // the sret argument into %rax/%eax (depending on ABI) for the return.
2052 // Save the argument into a virtual register so that we can access it
2053 // from the return points.
2054 if (Is64Bit && MF.getFunction()->hasStructRetAttr()) {
2055 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
2056 unsigned Reg = FuncInfo->getSRetReturnReg();
2058 MVT PtrTy = getPointerTy();
2059 Reg = MF.getRegInfo().createVirtualRegister(getRegClassFor(PtrTy));
2060 FuncInfo->setSRetReturnReg(Reg);
2062 SDValue Copy = DAG.getCopyToReg(DAG.getEntryNode(), dl, Reg, InVals[0]);
2063 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Copy, Chain);
2066 unsigned StackSize = CCInfo.getNextStackOffset();
2067 // Align stack specially for tail calls.
2068 if (FuncIsMadeTailCallSafe(CallConv,
2069 MF.getTarget().Options.GuaranteedTailCallOpt))
2070 StackSize = GetAlignedArgumentStackSize(StackSize, DAG);
2072 // If the function takes variable number of arguments, make a frame index for
2073 // the start of the first vararg value... for expansion of llvm.va_start.
2075 if (Is64Bit || (CallConv != CallingConv::X86_FastCall &&
2076 CallConv != CallingConv::X86_ThisCall)) {
2077 FuncInfo->setVarArgsFrameIndex(MFI->CreateFixedObject(1, StackSize,true));
2080 unsigned TotalNumIntRegs = 0, TotalNumXMMRegs = 0;
2082 // FIXME: We should really autogenerate these arrays
2083 static const uint16_t GPR64ArgRegsWin64[] = {
2084 X86::RCX, X86::RDX, X86::R8, X86::R9
2086 static const uint16_t GPR64ArgRegs64Bit[] = {
2087 X86::RDI, X86::RSI, X86::RDX, X86::RCX, X86::R8, X86::R9
2089 static const uint16_t XMMArgRegs64Bit[] = {
2090 X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3,
2091 X86::XMM4, X86::XMM5, X86::XMM6, X86::XMM7
2093 const uint16_t *GPR64ArgRegs;
2094 unsigned NumXMMRegs = 0;
2097 // The XMM registers which might contain var arg parameters are shadowed
2098 // in their paired GPR. So we only need to save the GPR to their home
2100 TotalNumIntRegs = 4;
2101 GPR64ArgRegs = GPR64ArgRegsWin64;
2103 TotalNumIntRegs = 6; TotalNumXMMRegs = 8;
2104 GPR64ArgRegs = GPR64ArgRegs64Bit;
2106 NumXMMRegs = CCInfo.getFirstUnallocated(XMMArgRegs64Bit,
2109 unsigned NumIntRegs = CCInfo.getFirstUnallocated(GPR64ArgRegs,
2112 bool NoImplicitFloatOps = Fn->getAttributes().
2113 hasAttribute(AttributeSet::FunctionIndex, Attribute::NoImplicitFloat);
2114 assert(!(NumXMMRegs && !Subtarget->hasSSE1()) &&
2115 "SSE register cannot be used when SSE is disabled!");
2116 assert(!(NumXMMRegs && MF.getTarget().Options.UseSoftFloat &&
2117 NoImplicitFloatOps) &&
2118 "SSE register cannot be used when SSE is disabled!");
2119 if (MF.getTarget().Options.UseSoftFloat || NoImplicitFloatOps ||
2120 !Subtarget->hasSSE1())
2121 // Kernel mode asks for SSE to be disabled, so don't push them
2123 TotalNumXMMRegs = 0;
2126 const TargetFrameLowering &TFI = *getTargetMachine().getFrameLowering();
2127 // Get to the caller-allocated home save location. Add 8 to account
2128 // for the return address.
2129 int HomeOffset = TFI.getOffsetOfLocalArea() + 8;
2130 FuncInfo->setRegSaveFrameIndex(
2131 MFI->CreateFixedObject(1, NumIntRegs * 8 + HomeOffset, false));
2132 // Fixup to set vararg frame on shadow area (4 x i64).
2134 FuncInfo->setVarArgsFrameIndex(FuncInfo->getRegSaveFrameIndex());
2136 // For X86-64, if there are vararg parameters that are passed via
2137 // registers, then we must store them to their spots on the stack so
2138 // they may be loaded by deferencing the result of va_next.
2139 FuncInfo->setVarArgsGPOffset(NumIntRegs * 8);
2140 FuncInfo->setVarArgsFPOffset(TotalNumIntRegs * 8 + NumXMMRegs * 16);
2141 FuncInfo->setRegSaveFrameIndex(
2142 MFI->CreateStackObject(TotalNumIntRegs * 8 + TotalNumXMMRegs * 16, 16,
2146 // Store the integer parameter registers.
2147 SmallVector<SDValue, 8> MemOps;
2148 SDValue RSFIN = DAG.getFrameIndex(FuncInfo->getRegSaveFrameIndex(),
2150 unsigned Offset = FuncInfo->getVarArgsGPOffset();
2151 for (; NumIntRegs != TotalNumIntRegs; ++NumIntRegs) {
2152 SDValue FIN = DAG.getNode(ISD::ADD, dl, getPointerTy(), RSFIN,
2153 DAG.getIntPtrConstant(Offset));
2154 unsigned VReg = MF.addLiveIn(GPR64ArgRegs[NumIntRegs],
2155 &X86::GR64RegClass);
2156 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i64);
2158 DAG.getStore(Val.getValue(1), dl, Val, FIN,
2159 MachinePointerInfo::getFixedStack(
2160 FuncInfo->getRegSaveFrameIndex(), Offset),
2162 MemOps.push_back(Store);
2166 if (TotalNumXMMRegs != 0 && NumXMMRegs != TotalNumXMMRegs) {
2167 // Now store the XMM (fp + vector) parameter registers.
2168 SmallVector<SDValue, 11> SaveXMMOps;
2169 SaveXMMOps.push_back(Chain);
2171 unsigned AL = MF.addLiveIn(X86::AL, &X86::GR8RegClass);
2172 SDValue ALVal = DAG.getCopyFromReg(DAG.getEntryNode(), dl, AL, MVT::i8);
2173 SaveXMMOps.push_back(ALVal);
2175 SaveXMMOps.push_back(DAG.getIntPtrConstant(
2176 FuncInfo->getRegSaveFrameIndex()));
2177 SaveXMMOps.push_back(DAG.getIntPtrConstant(
2178 FuncInfo->getVarArgsFPOffset()));
2180 for (; NumXMMRegs != TotalNumXMMRegs; ++NumXMMRegs) {
2181 unsigned VReg = MF.addLiveIn(XMMArgRegs64Bit[NumXMMRegs],
2182 &X86::VR128RegClass);
2183 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, MVT::v4f32);
2184 SaveXMMOps.push_back(Val);
2186 MemOps.push_back(DAG.getNode(X86ISD::VASTART_SAVE_XMM_REGS, dl,
2188 &SaveXMMOps[0], SaveXMMOps.size()));
2191 if (!MemOps.empty())
2192 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
2193 &MemOps[0], MemOps.size());
2197 // Some CCs need callee pop.
2198 if (X86::isCalleePop(CallConv, Is64Bit, isVarArg,
2199 MF.getTarget().Options.GuaranteedTailCallOpt)) {
2200 FuncInfo->setBytesToPopOnReturn(StackSize); // Callee pops everything.
2202 FuncInfo->setBytesToPopOnReturn(0); // Callee pops nothing.
2203 // If this is an sret function, the return should pop the hidden pointer.
2204 if (!Is64Bit && !IsTailCallConvention(CallConv) && !IsWindows &&
2205 argsAreStructReturn(Ins) == StackStructReturn)
2206 FuncInfo->setBytesToPopOnReturn(4);
2210 // RegSaveFrameIndex is X86-64 only.
2211 FuncInfo->setRegSaveFrameIndex(0xAAAAAAA);
2212 if (CallConv == CallingConv::X86_FastCall ||
2213 CallConv == CallingConv::X86_ThisCall)
2214 // fastcc functions can't have varargs.
2215 FuncInfo->setVarArgsFrameIndex(0xAAAAAAA);
2218 FuncInfo->setArgumentStackSize(StackSize);
2224 X86TargetLowering::LowerMemOpCallTo(SDValue Chain,
2225 SDValue StackPtr, SDValue Arg,
2226 DebugLoc dl, SelectionDAG &DAG,
2227 const CCValAssign &VA,
2228 ISD::ArgFlagsTy Flags) const {
2229 unsigned LocMemOffset = VA.getLocMemOffset();
2230 SDValue PtrOff = DAG.getIntPtrConstant(LocMemOffset);
2231 PtrOff = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr, PtrOff);
2232 if (Flags.isByVal())
2233 return CreateCopyOfByValArgument(Arg, PtrOff, Chain, Flags, DAG, dl);
2235 return DAG.getStore(Chain, dl, Arg, PtrOff,
2236 MachinePointerInfo::getStack(LocMemOffset),
2240 /// EmitTailCallLoadRetAddr - Emit a load of return address if tail call
2241 /// optimization is performed and it is required.
2243 X86TargetLowering::EmitTailCallLoadRetAddr(SelectionDAG &DAG,
2244 SDValue &OutRetAddr, SDValue Chain,
2245 bool IsTailCall, bool Is64Bit,
2246 int FPDiff, DebugLoc dl) const {
2247 // Adjust the Return address stack slot.
2248 EVT VT = getPointerTy();
2249 OutRetAddr = getReturnAddressFrameIndex(DAG);
2251 // Load the "old" Return address.
2252 OutRetAddr = DAG.getLoad(VT, dl, Chain, OutRetAddr, MachinePointerInfo(),
2253 false, false, false, 0);
2254 return SDValue(OutRetAddr.getNode(), 1);
2257 /// EmitTailCallStoreRetAddr - Emit a store of the return address if tail call
2258 /// optimization is performed and it is required (FPDiff!=0).
2260 EmitTailCallStoreRetAddr(SelectionDAG & DAG, MachineFunction &MF,
2261 SDValue Chain, SDValue RetAddrFrIdx, EVT PtrVT,
2262 unsigned SlotSize, int FPDiff, DebugLoc dl) {
2263 // Store the return address to the appropriate stack slot.
2264 if (!FPDiff) return Chain;
2265 // Calculate the new stack slot for the return address.
2266 int NewReturnAddrFI =
2267 MF.getFrameInfo()->CreateFixedObject(SlotSize, FPDiff-SlotSize, false);
2268 SDValue NewRetAddrFrIdx = DAG.getFrameIndex(NewReturnAddrFI, PtrVT);
2269 Chain = DAG.getStore(Chain, dl, RetAddrFrIdx, NewRetAddrFrIdx,
2270 MachinePointerInfo::getFixedStack(NewReturnAddrFI),
2276 X86TargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI,
2277 SmallVectorImpl<SDValue> &InVals) const {
2278 SelectionDAG &DAG = CLI.DAG;
2279 DebugLoc &dl = CLI.DL;
2280 SmallVector<ISD::OutputArg, 32> &Outs = CLI.Outs;
2281 SmallVector<SDValue, 32> &OutVals = CLI.OutVals;
2282 SmallVector<ISD::InputArg, 32> &Ins = CLI.Ins;
2283 SDValue Chain = CLI.Chain;
2284 SDValue Callee = CLI.Callee;
2285 CallingConv::ID CallConv = CLI.CallConv;
2286 bool &isTailCall = CLI.IsTailCall;
2287 bool isVarArg = CLI.IsVarArg;
2289 MachineFunction &MF = DAG.getMachineFunction();
2290 bool Is64Bit = Subtarget->is64Bit();
2291 bool IsWin64 = Subtarget->isTargetWin64();
2292 bool IsWindows = Subtarget->isTargetWindows();
2293 StructReturnType SR = callIsStructReturn(Outs);
2294 bool IsSibcall = false;
2296 if (MF.getTarget().Options.DisableTailCalls)
2300 // Check if it's really possible to do a tail call.
2301 isTailCall = IsEligibleForTailCallOptimization(Callee, CallConv,
2302 isVarArg, SR != NotStructReturn,
2303 MF.getFunction()->hasStructRetAttr(), CLI.RetTy,
2304 Outs, OutVals, Ins, DAG);
2306 // Sibcalls are automatically detected tailcalls which do not require
2308 if (!MF.getTarget().Options.GuaranteedTailCallOpt && isTailCall)
2315 assert(!(isVarArg && IsTailCallConvention(CallConv)) &&
2316 "Var args not supported with calling convention fastcc, ghc or hipe");
2318 // Analyze operands of the call, assigning locations to each operand.
2319 SmallVector<CCValAssign, 16> ArgLocs;
2320 CCState CCInfo(CallConv, isVarArg, MF, getTargetMachine(),
2321 ArgLocs, *DAG.getContext());
2323 // Allocate shadow area for Win64
2325 CCInfo.AllocateStack(32, 8);
2328 CCInfo.AnalyzeCallOperands(Outs, CC_X86);
2330 // Get a count of how many bytes are to be pushed on the stack.
2331 unsigned NumBytes = CCInfo.getNextStackOffset();
2333 // This is a sibcall. The memory operands are available in caller's
2334 // own caller's stack.
2336 else if (getTargetMachine().Options.GuaranteedTailCallOpt &&
2337 IsTailCallConvention(CallConv))
2338 NumBytes = GetAlignedArgumentStackSize(NumBytes, DAG);
2341 if (isTailCall && !IsSibcall) {
2342 // Lower arguments at fp - stackoffset + fpdiff.
2343 X86MachineFunctionInfo *X86Info = MF.getInfo<X86MachineFunctionInfo>();
2344 unsigned NumBytesCallerPushed = X86Info->getBytesToPopOnReturn();
2346 FPDiff = NumBytesCallerPushed - NumBytes;
2348 // Set the delta of movement of the returnaddr stackslot.
2349 // But only set if delta is greater than previous delta.
2350 if (FPDiff < X86Info->getTCReturnAddrDelta())
2351 X86Info->setTCReturnAddrDelta(FPDiff);
2355 Chain = DAG.getCALLSEQ_START(Chain, DAG.getIntPtrConstant(NumBytes, true));
2357 SDValue RetAddrFrIdx;
2358 // Load return address for tail calls.
2359 if (isTailCall && FPDiff)
2360 Chain = EmitTailCallLoadRetAddr(DAG, RetAddrFrIdx, Chain, isTailCall,
2361 Is64Bit, FPDiff, dl);
2363 SmallVector<std::pair<unsigned, SDValue>, 8> RegsToPass;
2364 SmallVector<SDValue, 8> MemOpChains;
2367 // Walk the register/memloc assignments, inserting copies/loads. In the case
2368 // of tail call optimization arguments are handle later.
2369 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2370 CCValAssign &VA = ArgLocs[i];
2371 EVT RegVT = VA.getLocVT();
2372 SDValue Arg = OutVals[i];
2373 ISD::ArgFlagsTy Flags = Outs[i].Flags;
2374 bool isByVal = Flags.isByVal();
2376 // Promote the value if needed.
2377 switch (VA.getLocInfo()) {
2378 default: llvm_unreachable("Unknown loc info!");
2379 case CCValAssign::Full: break;
2380 case CCValAssign::SExt:
2381 Arg = DAG.getNode(ISD::SIGN_EXTEND, dl, RegVT, Arg);
2383 case CCValAssign::ZExt:
2384 Arg = DAG.getNode(ISD::ZERO_EXTEND, dl, RegVT, Arg);
2386 case CCValAssign::AExt:
2387 if (RegVT.is128BitVector()) {
2388 // Special case: passing MMX values in XMM registers.
2389 Arg = DAG.getNode(ISD::BITCAST, dl, MVT::i64, Arg);
2390 Arg = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2i64, Arg);
2391 Arg = getMOVL(DAG, dl, MVT::v2i64, DAG.getUNDEF(MVT::v2i64), Arg);
2393 Arg = DAG.getNode(ISD::ANY_EXTEND, dl, RegVT, Arg);
2395 case CCValAssign::BCvt:
2396 Arg = DAG.getNode(ISD::BITCAST, dl, RegVT, Arg);
2398 case CCValAssign::Indirect: {
2399 // Store the argument.
2400 SDValue SpillSlot = DAG.CreateStackTemporary(VA.getValVT());
2401 int FI = cast<FrameIndexSDNode>(SpillSlot)->getIndex();
2402 Chain = DAG.getStore(Chain, dl, Arg, SpillSlot,
2403 MachinePointerInfo::getFixedStack(FI),
2410 if (VA.isRegLoc()) {
2411 RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
2412 if (isVarArg && IsWin64) {
2413 // Win64 ABI requires argument XMM reg to be copied to the corresponding
2414 // shadow reg if callee is a varargs function.
2415 unsigned ShadowReg = 0;
2416 switch (VA.getLocReg()) {
2417 case X86::XMM0: ShadowReg = X86::RCX; break;
2418 case X86::XMM1: ShadowReg = X86::RDX; break;
2419 case X86::XMM2: ShadowReg = X86::R8; break;
2420 case X86::XMM3: ShadowReg = X86::R9; break;
2423 RegsToPass.push_back(std::make_pair(ShadowReg, Arg));
2425 } else if (!IsSibcall && (!isTailCall || isByVal)) {
2426 assert(VA.isMemLoc());
2427 if (StackPtr.getNode() == 0)
2428 StackPtr = DAG.getCopyFromReg(Chain, dl, RegInfo->getStackRegister(),
2430 MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, Arg,
2431 dl, DAG, VA, Flags));
2435 if (!MemOpChains.empty())
2436 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
2437 &MemOpChains[0], MemOpChains.size());
2439 if (Subtarget->isPICStyleGOT()) {
2440 // ELF / PIC requires GOT in the EBX register before function calls via PLT
2443 RegsToPass.push_back(std::make_pair(unsigned(X86::EBX),
2444 DAG.getNode(X86ISD::GlobalBaseReg, DebugLoc(), getPointerTy())));
2446 // If we are tail calling and generating PIC/GOT style code load the
2447 // address of the callee into ECX. The value in ecx is used as target of
2448 // the tail jump. This is done to circumvent the ebx/callee-saved problem
2449 // for tail calls on PIC/GOT architectures. Normally we would just put the
2450 // address of GOT into ebx and then call target@PLT. But for tail calls
2451 // ebx would be restored (since ebx is callee saved) before jumping to the
2454 // Note: The actual moving to ECX is done further down.
2455 GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee);
2456 if (G && !G->getGlobal()->hasHiddenVisibility() &&
2457 !G->getGlobal()->hasProtectedVisibility())
2458 Callee = LowerGlobalAddress(Callee, DAG);
2459 else if (isa<ExternalSymbolSDNode>(Callee))
2460 Callee = LowerExternalSymbol(Callee, DAG);
2464 if (Is64Bit && isVarArg && !IsWin64) {
2465 // From AMD64 ABI document:
2466 // For calls that may call functions that use varargs or stdargs
2467 // (prototype-less calls or calls to functions containing ellipsis (...) in
2468 // the declaration) %al is used as hidden argument to specify the number
2469 // of SSE registers used. The contents of %al do not need to match exactly
2470 // the number of registers, but must be an ubound on the number of SSE
2471 // registers used and is in the range 0 - 8 inclusive.
2473 // Count the number of XMM registers allocated.
2474 static const uint16_t XMMArgRegs[] = {
2475 X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3,
2476 X86::XMM4, X86::XMM5, X86::XMM6, X86::XMM7
2478 unsigned NumXMMRegs = CCInfo.getFirstUnallocated(XMMArgRegs, 8);
2479 assert((Subtarget->hasSSE1() || !NumXMMRegs)
2480 && "SSE registers cannot be used when SSE is disabled");
2482 RegsToPass.push_back(std::make_pair(unsigned(X86::AL),
2483 DAG.getConstant(NumXMMRegs, MVT::i8)));
2486 // For tail calls lower the arguments to the 'real' stack slot.
2488 // Force all the incoming stack arguments to be loaded from the stack
2489 // before any new outgoing arguments are stored to the stack, because the
2490 // outgoing stack slots may alias the incoming argument stack slots, and
2491 // the alias isn't otherwise explicit. This is slightly more conservative
2492 // than necessary, because it means that each store effectively depends
2493 // on every argument instead of just those arguments it would clobber.
2494 SDValue ArgChain = DAG.getStackArgumentTokenFactor(Chain);
2496 SmallVector<SDValue, 8> MemOpChains2;
2499 if (getTargetMachine().Options.GuaranteedTailCallOpt) {
2500 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2501 CCValAssign &VA = ArgLocs[i];
2504 assert(VA.isMemLoc());
2505 SDValue Arg = OutVals[i];
2506 ISD::ArgFlagsTy Flags = Outs[i].Flags;
2507 // Create frame index.
2508 int32_t Offset = VA.getLocMemOffset()+FPDiff;
2509 uint32_t OpSize = (VA.getLocVT().getSizeInBits()+7)/8;
2510 FI = MF.getFrameInfo()->CreateFixedObject(OpSize, Offset, true);
2511 FIN = DAG.getFrameIndex(FI, getPointerTy());
2513 if (Flags.isByVal()) {
2514 // Copy relative to framepointer.
2515 SDValue Source = DAG.getIntPtrConstant(VA.getLocMemOffset());
2516 if (StackPtr.getNode() == 0)
2517 StackPtr = DAG.getCopyFromReg(Chain, dl,
2518 RegInfo->getStackRegister(),
2520 Source = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr, Source);
2522 MemOpChains2.push_back(CreateCopyOfByValArgument(Source, FIN,
2526 // Store relative to framepointer.
2527 MemOpChains2.push_back(
2528 DAG.getStore(ArgChain, dl, Arg, FIN,
2529 MachinePointerInfo::getFixedStack(FI),
2535 if (!MemOpChains2.empty())
2536 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
2537 &MemOpChains2[0], MemOpChains2.size());
2539 // Store the return address to the appropriate stack slot.
2540 Chain = EmitTailCallStoreRetAddr(DAG, MF, Chain, RetAddrFrIdx,
2541 getPointerTy(), RegInfo->getSlotSize(),
2545 // Build a sequence of copy-to-reg nodes chained together with token chain
2546 // and flag operands which copy the outgoing args into registers.
2548 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
2549 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
2550 RegsToPass[i].second, InFlag);
2551 InFlag = Chain.getValue(1);
2554 if (getTargetMachine().getCodeModel() == CodeModel::Large) {
2555 assert(Is64Bit && "Large code model is only legal in 64-bit mode.");
2556 // In the 64-bit large code model, we have to make all calls
2557 // through a register, since the call instruction's 32-bit
2558 // pc-relative offset may not be large enough to hold the whole
2560 } else if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
2561 // If the callee is a GlobalAddress node (quite common, every direct call
2562 // is) turn it into a TargetGlobalAddress node so that legalize doesn't hack
2565 // We should use extra load for direct calls to dllimported functions in
2567 const GlobalValue *GV = G->getGlobal();
2568 if (!GV->hasDLLImportLinkage()) {
2569 unsigned char OpFlags = 0;
2570 bool ExtraLoad = false;
2571 unsigned WrapperKind = ISD::DELETED_NODE;
2573 // On ELF targets, in both X86-64 and X86-32 mode, direct calls to
2574 // external symbols most go through the PLT in PIC mode. If the symbol
2575 // has hidden or protected visibility, or if it is static or local, then
2576 // we don't need to use the PLT - we can directly call it.
2577 if (Subtarget->isTargetELF() &&
2578 getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
2579 GV->hasDefaultVisibility() && !GV->hasLocalLinkage()) {
2580 OpFlags = X86II::MO_PLT;
2581 } else if (Subtarget->isPICStyleStubAny() &&
2582 (GV->isDeclaration() || GV->isWeakForLinker()) &&
2583 (!Subtarget->getTargetTriple().isMacOSX() ||
2584 Subtarget->getTargetTriple().isMacOSXVersionLT(10, 5))) {
2585 // PC-relative references to external symbols should go through $stub,
2586 // unless we're building with the leopard linker or later, which
2587 // automatically synthesizes these stubs.
2588 OpFlags = X86II::MO_DARWIN_STUB;
2589 } else if (Subtarget->isPICStyleRIPRel() &&
2590 isa<Function>(GV) &&
2591 cast<Function>(GV)->getAttributes().
2592 hasAttribute(AttributeSet::FunctionIndex,
2593 Attribute::NonLazyBind)) {
2594 // If the function is marked as non-lazy, generate an indirect call
2595 // which loads from the GOT directly. This avoids runtime overhead
2596 // at the cost of eager binding (and one extra byte of encoding).
2597 OpFlags = X86II::MO_GOTPCREL;
2598 WrapperKind = X86ISD::WrapperRIP;
2602 Callee = DAG.getTargetGlobalAddress(GV, dl, getPointerTy(),
2603 G->getOffset(), OpFlags);
2605 // Add a wrapper if needed.
2606 if (WrapperKind != ISD::DELETED_NODE)
2607 Callee = DAG.getNode(X86ISD::WrapperRIP, dl, getPointerTy(), Callee);
2608 // Add extra indirection if needed.
2610 Callee = DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(), Callee,
2611 MachinePointerInfo::getGOT(),
2612 false, false, false, 0);
2614 } else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) {
2615 unsigned char OpFlags = 0;
2617 // On ELF targets, in either X86-64 or X86-32 mode, direct calls to
2618 // external symbols should go through the PLT.
2619 if (Subtarget->isTargetELF() &&
2620 getTargetMachine().getRelocationModel() == Reloc::PIC_) {
2621 OpFlags = X86II::MO_PLT;
2622 } else if (Subtarget->isPICStyleStubAny() &&
2623 (!Subtarget->getTargetTriple().isMacOSX() ||
2624 Subtarget->getTargetTriple().isMacOSXVersionLT(10, 5))) {
2625 // PC-relative references to external symbols should go through $stub,
2626 // unless we're building with the leopard linker or later, which
2627 // automatically synthesizes these stubs.
2628 OpFlags = X86II::MO_DARWIN_STUB;
2631 Callee = DAG.getTargetExternalSymbol(S->getSymbol(), getPointerTy(),
2635 // Returns a chain & a flag for retval copy to use.
2636 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
2637 SmallVector<SDValue, 8> Ops;
2639 if (!IsSibcall && isTailCall) {
2640 Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(NumBytes, true),
2641 DAG.getIntPtrConstant(0, true), InFlag);
2642 InFlag = Chain.getValue(1);
2645 Ops.push_back(Chain);
2646 Ops.push_back(Callee);
2649 Ops.push_back(DAG.getConstant(FPDiff, MVT::i32));
2651 // Add argument registers to the end of the list so that they are known live
2653 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
2654 Ops.push_back(DAG.getRegister(RegsToPass[i].first,
2655 RegsToPass[i].second.getValueType()));
2657 // Add a register mask operand representing the call-preserved registers.
2658 const TargetRegisterInfo *TRI = getTargetMachine().getRegisterInfo();
2659 const uint32_t *Mask = TRI->getCallPreservedMask(CallConv);
2660 assert(Mask && "Missing call preserved mask for calling convention");
2661 Ops.push_back(DAG.getRegisterMask(Mask));
2663 if (InFlag.getNode())
2664 Ops.push_back(InFlag);
2668 //// If this is the first return lowered for this function, add the regs
2669 //// to the liveout set for the function.
2670 // This isn't right, although it's probably harmless on x86; liveouts
2671 // should be computed from returns not tail calls. Consider a void
2672 // function making a tail call to a function returning int.
2673 return DAG.getNode(X86ISD::TC_RETURN, dl, NodeTys, &Ops[0], Ops.size());
2676 Chain = DAG.getNode(X86ISD::CALL, dl, NodeTys, &Ops[0], Ops.size());
2677 InFlag = Chain.getValue(1);
2679 // Create the CALLSEQ_END node.
2680 unsigned NumBytesForCalleeToPush;
2681 if (X86::isCalleePop(CallConv, Is64Bit, isVarArg,
2682 getTargetMachine().Options.GuaranteedTailCallOpt))
2683 NumBytesForCalleeToPush = NumBytes; // Callee pops everything
2684 else if (!Is64Bit && !IsTailCallConvention(CallConv) && !IsWindows &&
2685 SR == StackStructReturn)
2686 // If this is a call to a struct-return function, the callee
2687 // pops the hidden struct pointer, so we have to push it back.
2688 // This is common for Darwin/X86, Linux & Mingw32 targets.
2689 // For MSVC Win32 targets, the caller pops the hidden struct pointer.
2690 NumBytesForCalleeToPush = 4;
2692 NumBytesForCalleeToPush = 0; // Callee pops nothing.
2694 // Returns a flag for retval copy to use.
2696 Chain = DAG.getCALLSEQ_END(Chain,
2697 DAG.getIntPtrConstant(NumBytes, true),
2698 DAG.getIntPtrConstant(NumBytesForCalleeToPush,
2701 InFlag = Chain.getValue(1);
2704 // Handle result values, copying them out of physregs into vregs that we
2706 return LowerCallResult(Chain, InFlag, CallConv, isVarArg,
2707 Ins, dl, DAG, InVals);
2710 //===----------------------------------------------------------------------===//
2711 // Fast Calling Convention (tail call) implementation
2712 //===----------------------------------------------------------------------===//
2714 // Like std call, callee cleans arguments, convention except that ECX is
2715 // reserved for storing the tail called function address. Only 2 registers are
2716 // free for argument passing (inreg). Tail call optimization is performed
2718 // * tailcallopt is enabled
2719 // * caller/callee are fastcc
2720 // On X86_64 architecture with GOT-style position independent code only local
2721 // (within module) calls are supported at the moment.
2722 // To keep the stack aligned according to platform abi the function
2723 // GetAlignedArgumentStackSize ensures that argument delta is always multiples
2724 // of stack alignment. (Dynamic linkers need this - darwin's dyld for example)
2725 // If a tail called function callee has more arguments than the caller the
2726 // caller needs to make sure that there is room to move the RETADDR to. This is
2727 // achieved by reserving an area the size of the argument delta right after the
2728 // original REtADDR, but before the saved framepointer or the spilled registers
2729 // e.g. caller(arg1, arg2) calls callee(arg1, arg2,arg3,arg4)
2741 /// GetAlignedArgumentStackSize - Make the stack size align e.g 16n + 12 aligned
2742 /// for a 16 byte align requirement.
2744 X86TargetLowering::GetAlignedArgumentStackSize(unsigned StackSize,
2745 SelectionDAG& DAG) const {
2746 MachineFunction &MF = DAG.getMachineFunction();
2747 const TargetMachine &TM = MF.getTarget();
2748 const TargetFrameLowering &TFI = *TM.getFrameLowering();
2749 unsigned StackAlignment = TFI.getStackAlignment();
2750 uint64_t AlignMask = StackAlignment - 1;
2751 int64_t Offset = StackSize;
2752 unsigned SlotSize = RegInfo->getSlotSize();
2753 if ( (Offset & AlignMask) <= (StackAlignment - SlotSize) ) {
2754 // Number smaller than 12 so just add the difference.
2755 Offset += ((StackAlignment - SlotSize) - (Offset & AlignMask));
2757 // Mask out lower bits, add stackalignment once plus the 12 bytes.
2758 Offset = ((~AlignMask) & Offset) + StackAlignment +
2759 (StackAlignment-SlotSize);
2764 /// MatchingStackOffset - Return true if the given stack call argument is
2765 /// already available in the same position (relatively) of the caller's
2766 /// incoming argument stack.
2768 bool MatchingStackOffset(SDValue Arg, unsigned Offset, ISD::ArgFlagsTy Flags,
2769 MachineFrameInfo *MFI, const MachineRegisterInfo *MRI,
2770 const X86InstrInfo *TII) {
2771 unsigned Bytes = Arg.getValueType().getSizeInBits() / 8;
2773 if (Arg.getOpcode() == ISD::CopyFromReg) {
2774 unsigned VR = cast<RegisterSDNode>(Arg.getOperand(1))->getReg();
2775 if (!TargetRegisterInfo::isVirtualRegister(VR))
2777 MachineInstr *Def = MRI->getVRegDef(VR);
2780 if (!Flags.isByVal()) {
2781 if (!TII->isLoadFromStackSlot(Def, FI))
2784 unsigned Opcode = Def->getOpcode();
2785 if ((Opcode == X86::LEA32r || Opcode == X86::LEA64r) &&
2786 Def->getOperand(1).isFI()) {
2787 FI = Def->getOperand(1).getIndex();
2788 Bytes = Flags.getByValSize();
2792 } else if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Arg)) {
2793 if (Flags.isByVal())
2794 // ByVal argument is passed in as a pointer but it's now being
2795 // dereferenced. e.g.
2796 // define @foo(%struct.X* %A) {
2797 // tail call @bar(%struct.X* byval %A)
2800 SDValue Ptr = Ld->getBasePtr();
2801 FrameIndexSDNode *FINode = dyn_cast<FrameIndexSDNode>(Ptr);
2804 FI = FINode->getIndex();
2805 } else if (Arg.getOpcode() == ISD::FrameIndex && Flags.isByVal()) {
2806 FrameIndexSDNode *FINode = cast<FrameIndexSDNode>(Arg);
2807 FI = FINode->getIndex();
2808 Bytes = Flags.getByValSize();
2812 assert(FI != INT_MAX);
2813 if (!MFI->isFixedObjectIndex(FI))
2815 return Offset == MFI->getObjectOffset(FI) && Bytes == MFI->getObjectSize(FI);
2818 /// IsEligibleForTailCallOptimization - Check whether the call is eligible
2819 /// for tail call optimization. Targets which want to do tail call
2820 /// optimization should implement this function.
2822 X86TargetLowering::IsEligibleForTailCallOptimization(SDValue Callee,
2823 CallingConv::ID CalleeCC,
2825 bool isCalleeStructRet,
2826 bool isCallerStructRet,
2828 const SmallVectorImpl<ISD::OutputArg> &Outs,
2829 const SmallVectorImpl<SDValue> &OutVals,
2830 const SmallVectorImpl<ISD::InputArg> &Ins,
2831 SelectionDAG &DAG) const {
2832 if (!IsTailCallConvention(CalleeCC) &&
2833 CalleeCC != CallingConv::C)
2836 // If -tailcallopt is specified, make fastcc functions tail-callable.
2837 const MachineFunction &MF = DAG.getMachineFunction();
2838 const Function *CallerF = DAG.getMachineFunction().getFunction();
2840 // If the function return type is x86_fp80 and the callee return type is not,
2841 // then the FP_EXTEND of the call result is not a nop. It's not safe to
2842 // perform a tailcall optimization here.
2843 if (CallerF->getReturnType()->isX86_FP80Ty() && !RetTy->isX86_FP80Ty())
2846 CallingConv::ID CallerCC = CallerF->getCallingConv();
2847 bool CCMatch = CallerCC == CalleeCC;
2849 if (getTargetMachine().Options.GuaranteedTailCallOpt) {
2850 if (IsTailCallConvention(CalleeCC) && CCMatch)
2855 // Look for obvious safe cases to perform tail call optimization that do not
2856 // require ABI changes. This is what gcc calls sibcall.
2858 // Can't do sibcall if stack needs to be dynamically re-aligned. PEI needs to
2859 // emit a special epilogue.
2860 if (RegInfo->needsStackRealignment(MF))
2863 // Also avoid sibcall optimization if either caller or callee uses struct
2864 // return semantics.
2865 if (isCalleeStructRet || isCallerStructRet)
2868 // An stdcall caller is expected to clean up its arguments; the callee
2869 // isn't going to do that.
2870 if (!CCMatch && CallerCC == CallingConv::X86_StdCall)
2873 // Do not sibcall optimize vararg calls unless all arguments are passed via
2875 if (isVarArg && !Outs.empty()) {
2877 // Optimizing for varargs on Win64 is unlikely to be safe without
2878 // additional testing.
2879 if (Subtarget->isTargetWin64())
2882 SmallVector<CCValAssign, 16> ArgLocs;
2883 CCState CCInfo(CalleeCC, isVarArg, DAG.getMachineFunction(),
2884 getTargetMachine(), ArgLocs, *DAG.getContext());
2886 CCInfo.AnalyzeCallOperands(Outs, CC_X86);
2887 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i)
2888 if (!ArgLocs[i].isRegLoc())
2892 // If the call result is in ST0 / ST1, it needs to be popped off the x87
2893 // stack. Therefore, if it's not used by the call it is not safe to optimize
2894 // this into a sibcall.
2895 bool Unused = false;
2896 for (unsigned i = 0, e = Ins.size(); i != e; ++i) {
2903 SmallVector<CCValAssign, 16> RVLocs;
2904 CCState CCInfo(CalleeCC, false, DAG.getMachineFunction(),
2905 getTargetMachine(), RVLocs, *DAG.getContext());
2906 CCInfo.AnalyzeCallResult(Ins, RetCC_X86);
2907 for (unsigned i = 0, e = RVLocs.size(); i != e; ++i) {
2908 CCValAssign &VA = RVLocs[i];
2909 if (VA.getLocReg() == X86::ST0 || VA.getLocReg() == X86::ST1)
2914 // If the calling conventions do not match, then we'd better make sure the
2915 // results are returned in the same way as what the caller expects.
2917 SmallVector<CCValAssign, 16> RVLocs1;
2918 CCState CCInfo1(CalleeCC, false, DAG.getMachineFunction(),
2919 getTargetMachine(), RVLocs1, *DAG.getContext());
2920 CCInfo1.AnalyzeCallResult(Ins, RetCC_X86);
2922 SmallVector<CCValAssign, 16> RVLocs2;
2923 CCState CCInfo2(CallerCC, false, DAG.getMachineFunction(),
2924 getTargetMachine(), RVLocs2, *DAG.getContext());
2925 CCInfo2.AnalyzeCallResult(Ins, RetCC_X86);
2927 if (RVLocs1.size() != RVLocs2.size())
2929 for (unsigned i = 0, e = RVLocs1.size(); i != e; ++i) {
2930 if (RVLocs1[i].isRegLoc() != RVLocs2[i].isRegLoc())
2932 if (RVLocs1[i].getLocInfo() != RVLocs2[i].getLocInfo())
2934 if (RVLocs1[i].isRegLoc()) {
2935 if (RVLocs1[i].getLocReg() != RVLocs2[i].getLocReg())
2938 if (RVLocs1[i].getLocMemOffset() != RVLocs2[i].getLocMemOffset())
2944 // If the callee takes no arguments then go on to check the results of the
2946 if (!Outs.empty()) {
2947 // Check if stack adjustment is needed. For now, do not do this if any
2948 // argument is passed on the stack.
2949 SmallVector<CCValAssign, 16> ArgLocs;
2950 CCState CCInfo(CalleeCC, isVarArg, DAG.getMachineFunction(),
2951 getTargetMachine(), ArgLocs, *DAG.getContext());
2953 // Allocate shadow area for Win64
2954 if (Subtarget->isTargetWin64()) {
2955 CCInfo.AllocateStack(32, 8);
2958 CCInfo.AnalyzeCallOperands(Outs, CC_X86);
2959 if (CCInfo.getNextStackOffset()) {
2960 MachineFunction &MF = DAG.getMachineFunction();
2961 if (MF.getInfo<X86MachineFunctionInfo>()->getBytesToPopOnReturn())
2964 // Check if the arguments are already laid out in the right way as
2965 // the caller's fixed stack objects.
2966 MachineFrameInfo *MFI = MF.getFrameInfo();
2967 const MachineRegisterInfo *MRI = &MF.getRegInfo();
2968 const X86InstrInfo *TII =
2969 ((const X86TargetMachine&)getTargetMachine()).getInstrInfo();
2970 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2971 CCValAssign &VA = ArgLocs[i];
2972 SDValue Arg = OutVals[i];
2973 ISD::ArgFlagsTy Flags = Outs[i].Flags;
2974 if (VA.getLocInfo() == CCValAssign::Indirect)
2976 if (!VA.isRegLoc()) {
2977 if (!MatchingStackOffset(Arg, VA.getLocMemOffset(), Flags,
2984 // If the tailcall address may be in a register, then make sure it's
2985 // possible to register allocate for it. In 32-bit, the call address can
2986 // only target EAX, EDX, or ECX since the tail call must be scheduled after
2987 // callee-saved registers are restored. These happen to be the same
2988 // registers used to pass 'inreg' arguments so watch out for those.
2989 if (!Subtarget->is64Bit() &&
2990 ((!isa<GlobalAddressSDNode>(Callee) &&
2991 !isa<ExternalSymbolSDNode>(Callee)) ||
2992 getTargetMachine().getRelocationModel() == Reloc::PIC_)) {
2993 unsigned NumInRegs = 0;
2994 // In PIC we need an extra register to formulate the address computation
2996 unsigned MaxInRegs =
2997 (getTargetMachine().getRelocationModel() == Reloc::PIC_) ? 2 : 3;
2999 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
3000 CCValAssign &VA = ArgLocs[i];
3003 unsigned Reg = VA.getLocReg();
3006 case X86::EAX: case X86::EDX: case X86::ECX:
3007 if (++NumInRegs == MaxInRegs)
3019 X86TargetLowering::createFastISel(FunctionLoweringInfo &funcInfo,
3020 const TargetLibraryInfo *libInfo) const {
3021 return X86::createFastISel(funcInfo, libInfo);
3024 //===----------------------------------------------------------------------===//
3025 // Other Lowering Hooks
3026 //===----------------------------------------------------------------------===//
3028 static bool MayFoldLoad(SDValue Op) {
3029 return Op.hasOneUse() && ISD::isNormalLoad(Op.getNode());
3032 static bool MayFoldIntoStore(SDValue Op) {
3033 return Op.hasOneUse() && ISD::isNormalStore(*Op.getNode()->use_begin());
3036 static bool isTargetShuffle(unsigned Opcode) {
3038 default: return false;
3039 case X86ISD::PSHUFD:
3040 case X86ISD::PSHUFHW:
3041 case X86ISD::PSHUFLW:
3043 case X86ISD::PALIGNR:
3044 case X86ISD::MOVLHPS:
3045 case X86ISD::MOVLHPD:
3046 case X86ISD::MOVHLPS:
3047 case X86ISD::MOVLPS:
3048 case X86ISD::MOVLPD:
3049 case X86ISD::MOVSHDUP:
3050 case X86ISD::MOVSLDUP:
3051 case X86ISD::MOVDDUP:
3054 case X86ISD::UNPCKL:
3055 case X86ISD::UNPCKH:
3056 case X86ISD::VPERMILP:
3057 case X86ISD::VPERM2X128:
3058 case X86ISD::VPERMI:
3063 static SDValue getTargetShuffleNode(unsigned Opc, DebugLoc dl, EVT VT,
3064 SDValue V1, SelectionDAG &DAG) {
3066 default: llvm_unreachable("Unknown x86 shuffle node");
3067 case X86ISD::MOVSHDUP:
3068 case X86ISD::MOVSLDUP:
3069 case X86ISD::MOVDDUP:
3070 return DAG.getNode(Opc, dl, VT, V1);
3074 static SDValue getTargetShuffleNode(unsigned Opc, DebugLoc dl, EVT VT,
3075 SDValue V1, unsigned TargetMask,
3076 SelectionDAG &DAG) {
3078 default: llvm_unreachable("Unknown x86 shuffle node");
3079 case X86ISD::PSHUFD:
3080 case X86ISD::PSHUFHW:
3081 case X86ISD::PSHUFLW:
3082 case X86ISD::VPERMILP:
3083 case X86ISD::VPERMI:
3084 return DAG.getNode(Opc, dl, VT, V1, DAG.getConstant(TargetMask, MVT::i8));
3088 static SDValue getTargetShuffleNode(unsigned Opc, DebugLoc dl, EVT VT,
3089 SDValue V1, SDValue V2, unsigned TargetMask,
3090 SelectionDAG &DAG) {
3092 default: llvm_unreachable("Unknown x86 shuffle node");
3093 case X86ISD::PALIGNR:
3095 case X86ISD::VPERM2X128:
3096 return DAG.getNode(Opc, dl, VT, V1, V2,
3097 DAG.getConstant(TargetMask, MVT::i8));
3101 static SDValue getTargetShuffleNode(unsigned Opc, DebugLoc dl, EVT VT,
3102 SDValue V1, SDValue V2, SelectionDAG &DAG) {
3104 default: llvm_unreachable("Unknown x86 shuffle node");
3105 case X86ISD::MOVLHPS:
3106 case X86ISD::MOVLHPD:
3107 case X86ISD::MOVHLPS:
3108 case X86ISD::MOVLPS:
3109 case X86ISD::MOVLPD:
3112 case X86ISD::UNPCKL:
3113 case X86ISD::UNPCKH:
3114 return DAG.getNode(Opc, dl, VT, V1, V2);
3118 SDValue X86TargetLowering::getReturnAddressFrameIndex(SelectionDAG &DAG) const {
3119 MachineFunction &MF = DAG.getMachineFunction();
3120 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
3121 int ReturnAddrIndex = FuncInfo->getRAIndex();
3123 if (ReturnAddrIndex == 0) {
3124 // Set up a frame object for the return address.
3125 unsigned SlotSize = RegInfo->getSlotSize();
3126 ReturnAddrIndex = MF.getFrameInfo()->CreateFixedObject(SlotSize, -SlotSize,
3128 FuncInfo->setRAIndex(ReturnAddrIndex);
3131 return DAG.getFrameIndex(ReturnAddrIndex, getPointerTy());
3134 bool X86::isOffsetSuitableForCodeModel(int64_t Offset, CodeModel::Model M,
3135 bool hasSymbolicDisplacement) {
3136 // Offset should fit into 32 bit immediate field.
3137 if (!isInt<32>(Offset))
3140 // If we don't have a symbolic displacement - we don't have any extra
3142 if (!hasSymbolicDisplacement)
3145 // FIXME: Some tweaks might be needed for medium code model.
3146 if (M != CodeModel::Small && M != CodeModel::Kernel)
3149 // For small code model we assume that latest object is 16MB before end of 31
3150 // bits boundary. We may also accept pretty large negative constants knowing
3151 // that all objects are in the positive half of address space.
3152 if (M == CodeModel::Small && Offset < 16*1024*1024)
3155 // For kernel code model we know that all object resist in the negative half
3156 // of 32bits address space. We may not accept negative offsets, since they may
3157 // be just off and we may accept pretty large positive ones.
3158 if (M == CodeModel::Kernel && Offset > 0)
3164 /// isCalleePop - Determines whether the callee is required to pop its
3165 /// own arguments. Callee pop is necessary to support tail calls.
3166 bool X86::isCalleePop(CallingConv::ID CallingConv,
3167 bool is64Bit, bool IsVarArg, bool TailCallOpt) {
3171 switch (CallingConv) {
3174 case CallingConv::X86_StdCall:
3176 case CallingConv::X86_FastCall:
3178 case CallingConv::X86_ThisCall:
3180 case CallingConv::Fast:
3182 case CallingConv::GHC:
3184 case CallingConv::HiPE:
3189 /// TranslateX86CC - do a one to one translation of a ISD::CondCode to the X86
3190 /// specific condition code, returning the condition code and the LHS/RHS of the
3191 /// comparison to make.
3192 static unsigned TranslateX86CC(ISD::CondCode SetCCOpcode, bool isFP,
3193 SDValue &LHS, SDValue &RHS, SelectionDAG &DAG) {
3195 if (ConstantSDNode *RHSC = dyn_cast<ConstantSDNode>(RHS)) {
3196 if (SetCCOpcode == ISD::SETGT && RHSC->isAllOnesValue()) {
3197 // X > -1 -> X == 0, jump !sign.
3198 RHS = DAG.getConstant(0, RHS.getValueType());
3199 return X86::COND_NS;
3201 if (SetCCOpcode == ISD::SETLT && RHSC->isNullValue()) {
3202 // X < 0 -> X == 0, jump on sign.
3205 if (SetCCOpcode == ISD::SETLT && RHSC->getZExtValue() == 1) {
3207 RHS = DAG.getConstant(0, RHS.getValueType());
3208 return X86::COND_LE;
3212 switch (SetCCOpcode) {
3213 default: llvm_unreachable("Invalid integer condition!");
3214 case ISD::SETEQ: return X86::COND_E;
3215 case ISD::SETGT: return X86::COND_G;
3216 case ISD::SETGE: return X86::COND_GE;
3217 case ISD::SETLT: return X86::COND_L;
3218 case ISD::SETLE: return X86::COND_LE;
3219 case ISD::SETNE: return X86::COND_NE;
3220 case ISD::SETULT: return X86::COND_B;
3221 case ISD::SETUGT: return X86::COND_A;
3222 case ISD::SETULE: return X86::COND_BE;
3223 case ISD::SETUGE: return X86::COND_AE;
3227 // First determine if it is required or is profitable to flip the operands.
3229 // If LHS is a foldable load, but RHS is not, flip the condition.
3230 if (ISD::isNON_EXTLoad(LHS.getNode()) &&
3231 !ISD::isNON_EXTLoad(RHS.getNode())) {
3232 SetCCOpcode = getSetCCSwappedOperands(SetCCOpcode);
3233 std::swap(LHS, RHS);
3236 switch (SetCCOpcode) {
3242 std::swap(LHS, RHS);
3246 // On a floating point condition, the flags are set as follows:
3248 // 0 | 0 | 0 | X > Y
3249 // 0 | 0 | 1 | X < Y
3250 // 1 | 0 | 0 | X == Y
3251 // 1 | 1 | 1 | unordered
3252 switch (SetCCOpcode) {
3253 default: llvm_unreachable("Condcode should be pre-legalized away");
3255 case ISD::SETEQ: return X86::COND_E;
3256 case ISD::SETOLT: // flipped
3258 case ISD::SETGT: return X86::COND_A;
3259 case ISD::SETOLE: // flipped
3261 case ISD::SETGE: return X86::COND_AE;
3262 case ISD::SETUGT: // flipped
3264 case ISD::SETLT: return X86::COND_B;
3265 case ISD::SETUGE: // flipped
3267 case ISD::SETLE: return X86::COND_BE;
3269 case ISD::SETNE: return X86::COND_NE;
3270 case ISD::SETUO: return X86::COND_P;
3271 case ISD::SETO: return X86::COND_NP;
3273 case ISD::SETUNE: return X86::COND_INVALID;
3277 /// hasFPCMov - is there a floating point cmov for the specific X86 condition
3278 /// code. Current x86 isa includes the following FP cmov instructions:
3279 /// fcmovb, fcomvbe, fcomve, fcmovu, fcmovae, fcmova, fcmovne, fcmovnu.
3280 static bool hasFPCMov(unsigned X86CC) {
3296 /// isFPImmLegal - Returns true if the target can instruction select the
3297 /// specified FP immediate natively. If false, the legalizer will
3298 /// materialize the FP immediate as a load from a constant pool.
3299 bool X86TargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT) const {
3300 for (unsigned i = 0, e = LegalFPImmediates.size(); i != e; ++i) {
3301 if (Imm.bitwiseIsEqual(LegalFPImmediates[i]))
3307 /// isUndefOrInRange - Return true if Val is undef or if its value falls within
3308 /// the specified range (L, H].
3309 static bool isUndefOrInRange(int Val, int Low, int Hi) {
3310 return (Val < 0) || (Val >= Low && Val < Hi);
3313 /// isUndefOrEqual - Val is either less than zero (undef) or equal to the
3314 /// specified value.
3315 static bool isUndefOrEqual(int Val, int CmpVal) {
3316 return (Val < 0 || Val == CmpVal);
3319 /// isSequentialOrUndefInRange - Return true if every element in Mask, beginning
3320 /// from position Pos and ending in Pos+Size, falls within the specified
3321 /// sequential range (L, L+Pos]. or is undef.
3322 static bool isSequentialOrUndefInRange(ArrayRef<int> Mask,
3323 unsigned Pos, unsigned Size, int Low) {
3324 for (unsigned i = Pos, e = Pos+Size; i != e; ++i, ++Low)
3325 if (!isUndefOrEqual(Mask[i], Low))
3330 /// isPSHUFDMask - Return true if the node specifies a shuffle of elements that
3331 /// is suitable for input to PSHUFD or PSHUFW. That is, it doesn't reference
3332 /// the second operand.
3333 static bool isPSHUFDMask(ArrayRef<int> Mask, EVT VT) {
3334 if (VT == MVT::v4f32 || VT == MVT::v4i32 )
3335 return (Mask[0] < 4 && Mask[1] < 4 && Mask[2] < 4 && Mask[3] < 4);
3336 if (VT == MVT::v2f64 || VT == MVT::v2i64)
3337 return (Mask[0] < 2 && Mask[1] < 2);
3341 /// isPSHUFHWMask - Return true if the node specifies a shuffle of elements that
3342 /// is suitable for input to PSHUFHW.
3343 static bool isPSHUFHWMask(ArrayRef<int> Mask, EVT VT, bool HasInt256) {
3344 if (VT != MVT::v8i16 && (!HasInt256 || VT != MVT::v16i16))
3347 // Lower quadword copied in order or undef.
3348 if (!isSequentialOrUndefInRange(Mask, 0, 4, 0))
3351 // Upper quadword shuffled.
3352 for (unsigned i = 4; i != 8; ++i)
3353 if (!isUndefOrInRange(Mask[i], 4, 8))
3356 if (VT == MVT::v16i16) {
3357 // Lower quadword copied in order or undef.
3358 if (!isSequentialOrUndefInRange(Mask, 8, 4, 8))
3361 // Upper quadword shuffled.
3362 for (unsigned i = 12; i != 16; ++i)
3363 if (!isUndefOrInRange(Mask[i], 12, 16))
3370 /// isPSHUFLWMask - Return true if the node specifies a shuffle of elements that
3371 /// is suitable for input to PSHUFLW.
3372 static bool isPSHUFLWMask(ArrayRef<int> Mask, EVT VT, bool HasInt256) {
3373 if (VT != MVT::v8i16 && (!HasInt256 || VT != MVT::v16i16))
3376 // Upper quadword copied in order.
3377 if (!isSequentialOrUndefInRange(Mask, 4, 4, 4))
3380 // Lower quadword shuffled.
3381 for (unsigned i = 0; i != 4; ++i)
3382 if (!isUndefOrInRange(Mask[i], 0, 4))
3385 if (VT == MVT::v16i16) {
3386 // Upper quadword copied in order.
3387 if (!isSequentialOrUndefInRange(Mask, 12, 4, 12))
3390 // Lower quadword shuffled.
3391 for (unsigned i = 8; i != 12; ++i)
3392 if (!isUndefOrInRange(Mask[i], 8, 12))
3399 /// isPALIGNRMask - Return true if the node specifies a shuffle of elements that
3400 /// is suitable for input to PALIGNR.
3401 static bool isPALIGNRMask(ArrayRef<int> Mask, EVT VT,
3402 const X86Subtarget *Subtarget) {
3403 if ((VT.is128BitVector() && !Subtarget->hasSSSE3()) ||
3404 (VT.is256BitVector() && !Subtarget->hasInt256()))
3407 unsigned NumElts = VT.getVectorNumElements();
3408 unsigned NumLanes = VT.getSizeInBits()/128;
3409 unsigned NumLaneElts = NumElts/NumLanes;
3411 // Do not handle 64-bit element shuffles with palignr.
3412 if (NumLaneElts == 2)
3415 for (unsigned l = 0; l != NumElts; l+=NumLaneElts) {
3417 for (i = 0; i != NumLaneElts; ++i) {
3422 // Lane is all undef, go to next lane
3423 if (i == NumLaneElts)
3426 int Start = Mask[i+l];
3428 // Make sure its in this lane in one of the sources
3429 if (!isUndefOrInRange(Start, l, l+NumLaneElts) &&
3430 !isUndefOrInRange(Start, l+NumElts, l+NumElts+NumLaneElts))
3433 // If not lane 0, then we must match lane 0
3434 if (l != 0 && Mask[i] >= 0 && !isUndefOrEqual(Start, Mask[i]+l))
3437 // Correct second source to be contiguous with first source
3438 if (Start >= (int)NumElts)
3439 Start -= NumElts - NumLaneElts;
3441 // Make sure we're shifting in the right direction.
3442 if (Start <= (int)(i+l))
3447 // Check the rest of the elements to see if they are consecutive.
3448 for (++i; i != NumLaneElts; ++i) {
3449 int Idx = Mask[i+l];
3451 // Make sure its in this lane
3452 if (!isUndefOrInRange(Idx, l, l+NumLaneElts) &&
3453 !isUndefOrInRange(Idx, l+NumElts, l+NumElts+NumLaneElts))
3456 // If not lane 0, then we must match lane 0
3457 if (l != 0 && Mask[i] >= 0 && !isUndefOrEqual(Idx, Mask[i]+l))
3460 if (Idx >= (int)NumElts)
3461 Idx -= NumElts - NumLaneElts;
3463 if (!isUndefOrEqual(Idx, Start+i))
3472 /// CommuteVectorShuffleMask - Change values in a shuffle permute mask assuming
3473 /// the two vector operands have swapped position.
3474 static void CommuteVectorShuffleMask(SmallVectorImpl<int> &Mask,
3475 unsigned NumElems) {
3476 for (unsigned i = 0; i != NumElems; ++i) {
3480 else if (idx < (int)NumElems)
3481 Mask[i] = idx + NumElems;
3483 Mask[i] = idx - NumElems;
3487 /// isSHUFPMask - Return true if the specified VECTOR_SHUFFLE operand
3488 /// specifies a shuffle of elements that is suitable for input to 128/256-bit
3489 /// SHUFPS and SHUFPD. If Commuted is true, then it checks for sources to be
3490 /// reverse of what x86 shuffles want.
3491 static bool isSHUFPMask(ArrayRef<int> Mask, EVT VT, bool HasFp256,
3492 bool Commuted = false) {
3493 if (!HasFp256 && VT.is256BitVector())
3496 unsigned NumElems = VT.getVectorNumElements();
3497 unsigned NumLanes = VT.getSizeInBits()/128;
3498 unsigned NumLaneElems = NumElems/NumLanes;
3500 if (NumLaneElems != 2 && NumLaneElems != 4)
3503 // VSHUFPSY divides the resulting vector into 4 chunks.
3504 // The sources are also splitted into 4 chunks, and each destination
3505 // chunk must come from a different source chunk.
3507 // SRC1 => X7 X6 X5 X4 X3 X2 X1 X0
3508 // SRC2 => Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y9
3510 // DST => Y7..Y4, Y7..Y4, X7..X4, X7..X4,
3511 // Y3..Y0, Y3..Y0, X3..X0, X3..X0
3513 // VSHUFPDY divides the resulting vector into 4 chunks.
3514 // The sources are also splitted into 4 chunks, and each destination
3515 // chunk must come from a different source chunk.
3517 // SRC1 => X3 X2 X1 X0
3518 // SRC2 => Y3 Y2 Y1 Y0
3520 // DST => Y3..Y2, X3..X2, Y1..Y0, X1..X0
3522 unsigned HalfLaneElems = NumLaneElems/2;
3523 for (unsigned l = 0; l != NumElems; l += NumLaneElems) {
3524 for (unsigned i = 0; i != NumLaneElems; ++i) {
3525 int Idx = Mask[i+l];
3526 unsigned RngStart = l + ((Commuted == (i<HalfLaneElems)) ? NumElems : 0);
3527 if (!isUndefOrInRange(Idx, RngStart, RngStart+NumLaneElems))
3529 // For VSHUFPSY, the mask of the second half must be the same as the
3530 // first but with the appropriate offsets. This works in the same way as
3531 // VPERMILPS works with masks.
3532 if (NumElems != 8 || l == 0 || Mask[i] < 0)
3534 if (!isUndefOrEqual(Idx, Mask[i]+l))
3542 /// isMOVHLPSMask - Return true if the specified VECTOR_SHUFFLE operand
3543 /// specifies a shuffle of elements that is suitable for input to MOVHLPS.
3544 static bool isMOVHLPSMask(ArrayRef<int> Mask, EVT VT) {
3545 if (!VT.is128BitVector())
3548 unsigned NumElems = VT.getVectorNumElements();
3553 // Expect bit0 == 6, bit1 == 7, bit2 == 2, bit3 == 3
3554 return isUndefOrEqual(Mask[0], 6) &&
3555 isUndefOrEqual(Mask[1], 7) &&
3556 isUndefOrEqual(Mask[2], 2) &&
3557 isUndefOrEqual(Mask[3], 3);
3560 /// isMOVHLPS_v_undef_Mask - Special case of isMOVHLPSMask for canonical form
3561 /// of vector_shuffle v, v, <2, 3, 2, 3>, i.e. vector_shuffle v, undef,
3563 static bool isMOVHLPS_v_undef_Mask(ArrayRef<int> Mask, EVT VT) {
3564 if (!VT.is128BitVector())
3567 unsigned NumElems = VT.getVectorNumElements();
3572 return isUndefOrEqual(Mask[0], 2) &&
3573 isUndefOrEqual(Mask[1], 3) &&
3574 isUndefOrEqual(Mask[2], 2) &&
3575 isUndefOrEqual(Mask[3], 3);
3578 /// isMOVLPMask - Return true if the specified VECTOR_SHUFFLE operand
3579 /// specifies a shuffle of elements that is suitable for input to MOVLP{S|D}.
3580 static bool isMOVLPMask(ArrayRef<int> Mask, EVT VT) {
3581 if (!VT.is128BitVector())
3584 unsigned NumElems = VT.getVectorNumElements();
3586 if (NumElems != 2 && NumElems != 4)
3589 for (unsigned i = 0, e = NumElems/2; i != e; ++i)
3590 if (!isUndefOrEqual(Mask[i], i + NumElems))
3593 for (unsigned i = NumElems/2, e = NumElems; i != e; ++i)
3594 if (!isUndefOrEqual(Mask[i], i))
3600 /// isMOVLHPSMask - Return true if the specified VECTOR_SHUFFLE operand
3601 /// specifies a shuffle of elements that is suitable for input to MOVLHPS.
3602 static bool isMOVLHPSMask(ArrayRef<int> Mask, EVT VT) {
3603 if (!VT.is128BitVector())
3606 unsigned NumElems = VT.getVectorNumElements();
3608 if (NumElems != 2 && NumElems != 4)
3611 for (unsigned i = 0, e = NumElems/2; i != e; ++i)
3612 if (!isUndefOrEqual(Mask[i], i))
3615 for (unsigned i = 0, e = NumElems/2; i != e; ++i)
3616 if (!isUndefOrEqual(Mask[i + e], i + NumElems))
3623 // Some special combinations that can be optimized.
3626 SDValue Compact8x32ShuffleNode(ShuffleVectorSDNode *SVOp,
3627 SelectionDAG &DAG) {
3628 MVT VT = SVOp->getValueType(0).getSimpleVT();
3629 DebugLoc dl = SVOp->getDebugLoc();
3631 if (VT != MVT::v8i32 && VT != MVT::v8f32)
3634 ArrayRef<int> Mask = SVOp->getMask();
3636 // These are the special masks that may be optimized.
3637 static const int MaskToOptimizeEven[] = {0, 8, 2, 10, 4, 12, 6, 14};
3638 static const int MaskToOptimizeOdd[] = {1, 9, 3, 11, 5, 13, 7, 15};
3639 bool MatchEvenMask = true;
3640 bool MatchOddMask = true;
3641 for (int i=0; i<8; ++i) {
3642 if (!isUndefOrEqual(Mask[i], MaskToOptimizeEven[i]))
3643 MatchEvenMask = false;
3644 if (!isUndefOrEqual(Mask[i], MaskToOptimizeOdd[i]))
3645 MatchOddMask = false;
3648 if (!MatchEvenMask && !MatchOddMask)
3651 SDValue UndefNode = DAG.getNode(ISD::UNDEF, dl, VT);
3653 SDValue Op0 = SVOp->getOperand(0);
3654 SDValue Op1 = SVOp->getOperand(1);
3656 if (MatchEvenMask) {
3657 // Shift the second operand right to 32 bits.
3658 static const int ShiftRightMask[] = {-1, 0, -1, 2, -1, 4, -1, 6 };
3659 Op1 = DAG.getVectorShuffle(VT, dl, Op1, UndefNode, ShiftRightMask);
3661 // Shift the first operand left to 32 bits.
3662 static const int ShiftLeftMask[] = {1, -1, 3, -1, 5, -1, 7, -1 };
3663 Op0 = DAG.getVectorShuffle(VT, dl, Op0, UndefNode, ShiftLeftMask);
3665 static const int BlendMask[] = {0, 9, 2, 11, 4, 13, 6, 15};
3666 return DAG.getVectorShuffle(VT, dl, Op0, Op1, BlendMask);
3669 /// isUNPCKLMask - Return true if the specified VECTOR_SHUFFLE operand
3670 /// specifies a shuffle of elements that is suitable for input to UNPCKL.
3671 static bool isUNPCKLMask(ArrayRef<int> Mask, EVT VT,
3672 bool HasInt256, bool V2IsSplat = false) {
3673 unsigned NumElts = VT.getVectorNumElements();
3675 assert((VT.is128BitVector() || VT.is256BitVector()) &&
3676 "Unsupported vector type for unpckh");
3678 if (VT.is256BitVector() && NumElts != 4 && NumElts != 8 &&
3679 (!HasInt256 || (NumElts != 16 && NumElts != 32)))
3682 // Handle 128 and 256-bit vector lengths. AVX defines UNPCK* to operate
3683 // independently on 128-bit lanes.
3684 unsigned NumLanes = VT.getSizeInBits()/128;
3685 unsigned NumLaneElts = NumElts/NumLanes;
3687 for (unsigned l = 0; l != NumLanes; ++l) {
3688 for (unsigned i = l*NumLaneElts, j = l*NumLaneElts;
3689 i != (l+1)*NumLaneElts;
3692 int BitI1 = Mask[i+1];
3693 if (!isUndefOrEqual(BitI, j))
3696 if (!isUndefOrEqual(BitI1, NumElts))
3699 if (!isUndefOrEqual(BitI1, j + NumElts))
3708 /// isUNPCKHMask - Return true if the specified VECTOR_SHUFFLE operand
3709 /// specifies a shuffle of elements that is suitable for input to UNPCKH.
3710 static bool isUNPCKHMask(ArrayRef<int> Mask, EVT VT,
3711 bool HasInt256, bool V2IsSplat = false) {
3712 unsigned NumElts = VT.getVectorNumElements();
3714 assert((VT.is128BitVector() || VT.is256BitVector()) &&
3715 "Unsupported vector type for unpckh");
3717 if (VT.is256BitVector() && NumElts != 4 && NumElts != 8 &&
3718 (!HasInt256 || (NumElts != 16 && NumElts != 32)))
3721 // Handle 128 and 256-bit vector lengths. AVX defines UNPCK* to operate
3722 // independently on 128-bit lanes.
3723 unsigned NumLanes = VT.getSizeInBits()/128;
3724 unsigned NumLaneElts = NumElts/NumLanes;
3726 for (unsigned l = 0; l != NumLanes; ++l) {
3727 for (unsigned i = l*NumLaneElts, j = (l*NumLaneElts)+NumLaneElts/2;
3728 i != (l+1)*NumLaneElts; i += 2, ++j) {
3730 int BitI1 = Mask[i+1];
3731 if (!isUndefOrEqual(BitI, j))
3734 if (isUndefOrEqual(BitI1, NumElts))
3737 if (!isUndefOrEqual(BitI1, j+NumElts))
3745 /// isUNPCKL_v_undef_Mask - Special case of isUNPCKLMask for canonical form
3746 /// of vector_shuffle v, v, <0, 4, 1, 5>, i.e. vector_shuffle v, undef,
3748 static bool isUNPCKL_v_undef_Mask(ArrayRef<int> Mask, EVT VT, bool HasInt256) {
3749 unsigned NumElts = VT.getVectorNumElements();
3750 bool Is256BitVec = VT.is256BitVector();
3752 assert((VT.is128BitVector() || VT.is256BitVector()) &&
3753 "Unsupported vector type for unpckh");
3755 if (Is256BitVec && NumElts != 4 && NumElts != 8 &&
3756 (!HasInt256 || (NumElts != 16 && NumElts != 32)))
3759 // For 256-bit i64/f64, use MOVDDUPY instead, so reject the matching pattern
3760 // FIXME: Need a better way to get rid of this, there's no latency difference
3761 // between UNPCKLPD and MOVDDUP, the later should always be checked first and
3762 // the former later. We should also remove the "_undef" special mask.
3763 if (NumElts == 4 && Is256BitVec)
3766 // Handle 128 and 256-bit vector lengths. AVX defines UNPCK* to operate
3767 // independently on 128-bit lanes.
3768 unsigned NumLanes = VT.getSizeInBits()/128;
3769 unsigned NumLaneElts = NumElts/NumLanes;
3771 for (unsigned l = 0; l != NumLanes; ++l) {
3772 for (unsigned i = l*NumLaneElts, j = l*NumLaneElts;
3773 i != (l+1)*NumLaneElts;
3776 int BitI1 = Mask[i+1];
3778 if (!isUndefOrEqual(BitI, j))
3780 if (!isUndefOrEqual(BitI1, j))
3788 /// isUNPCKH_v_undef_Mask - Special case of isUNPCKHMask for canonical form
3789 /// of vector_shuffle v, v, <2, 6, 3, 7>, i.e. vector_shuffle v, undef,
3791 static bool isUNPCKH_v_undef_Mask(ArrayRef<int> Mask, EVT VT, bool HasInt256) {
3792 unsigned NumElts = VT.getVectorNumElements();
3794 assert((VT.is128BitVector() || VT.is256BitVector()) &&
3795 "Unsupported vector type for unpckh");
3797 if (VT.is256BitVector() && NumElts != 4 && NumElts != 8 &&
3798 (!HasInt256 || (NumElts != 16 && NumElts != 32)))
3801 // Handle 128 and 256-bit vector lengths. AVX defines UNPCK* to operate
3802 // independently on 128-bit lanes.
3803 unsigned NumLanes = VT.getSizeInBits()/128;
3804 unsigned NumLaneElts = NumElts/NumLanes;
3806 for (unsigned l = 0; l != NumLanes; ++l) {
3807 for (unsigned i = l*NumLaneElts, j = (l*NumLaneElts)+NumLaneElts/2;
3808 i != (l+1)*NumLaneElts; i += 2, ++j) {
3810 int BitI1 = Mask[i+1];
3811 if (!isUndefOrEqual(BitI, j))
3813 if (!isUndefOrEqual(BitI1, j))
3820 /// isMOVLMask - Return true if the specified VECTOR_SHUFFLE operand
3821 /// specifies a shuffle of elements that is suitable for input to MOVSS,
3822 /// MOVSD, and MOVD, i.e. setting the lowest element.
3823 static bool isMOVLMask(ArrayRef<int> Mask, EVT VT) {
3824 if (VT.getVectorElementType().getSizeInBits() < 32)
3826 if (!VT.is128BitVector())
3829 unsigned NumElts = VT.getVectorNumElements();
3831 if (!isUndefOrEqual(Mask[0], NumElts))
3834 for (unsigned i = 1; i != NumElts; ++i)
3835 if (!isUndefOrEqual(Mask[i], i))
3841 /// isVPERM2X128Mask - Match 256-bit shuffles where the elements are considered
3842 /// as permutations between 128-bit chunks or halves. As an example: this
3844 /// vector_shuffle <4, 5, 6, 7, 12, 13, 14, 15>
3845 /// The first half comes from the second half of V1 and the second half from the
3846 /// the second half of V2.
3847 static bool isVPERM2X128Mask(ArrayRef<int> Mask, EVT VT, bool HasFp256) {
3848 if (!HasFp256 || !VT.is256BitVector())
3851 // The shuffle result is divided into half A and half B. In total the two
3852 // sources have 4 halves, namely: C, D, E, F. The final values of A and
3853 // B must come from C, D, E or F.
3854 unsigned HalfSize = VT.getVectorNumElements()/2;
3855 bool MatchA = false, MatchB = false;
3857 // Check if A comes from one of C, D, E, F.
3858 for (unsigned Half = 0; Half != 4; ++Half) {
3859 if (isSequentialOrUndefInRange(Mask, 0, HalfSize, Half*HalfSize)) {
3865 // Check if B comes from one of C, D, E, F.
3866 for (unsigned Half = 0; Half != 4; ++Half) {
3867 if (isSequentialOrUndefInRange(Mask, HalfSize, HalfSize, Half*HalfSize)) {
3873 return MatchA && MatchB;
3876 /// getShuffleVPERM2X128Immediate - Return the appropriate immediate to shuffle
3877 /// the specified VECTOR_MASK mask with VPERM2F128/VPERM2I128 instructions.
3878 static unsigned getShuffleVPERM2X128Immediate(ShuffleVectorSDNode *SVOp) {
3879 MVT VT = SVOp->getValueType(0).getSimpleVT();
3881 unsigned HalfSize = VT.getVectorNumElements()/2;
3883 unsigned FstHalf = 0, SndHalf = 0;
3884 for (unsigned i = 0; i < HalfSize; ++i) {
3885 if (SVOp->getMaskElt(i) > 0) {
3886 FstHalf = SVOp->getMaskElt(i)/HalfSize;
3890 for (unsigned i = HalfSize; i < HalfSize*2; ++i) {
3891 if (SVOp->getMaskElt(i) > 0) {
3892 SndHalf = SVOp->getMaskElt(i)/HalfSize;
3897 return (FstHalf | (SndHalf << 4));
3900 /// isVPERMILPMask - Return true if the specified VECTOR_SHUFFLE operand
3901 /// specifies a shuffle of elements that is suitable for input to VPERMILPD*.
3902 /// Note that VPERMIL mask matching is different depending whether theunderlying
3903 /// type is 32 or 64. In the VPERMILPS the high half of the mask should point
3904 /// to the same elements of the low, but to the higher half of the source.
3905 /// In VPERMILPD the two lanes could be shuffled independently of each other
3906 /// with the same restriction that lanes can't be crossed. Also handles PSHUFDY.
3907 static bool isVPERMILPMask(ArrayRef<int> Mask, EVT VT, bool HasFp256) {
3911 unsigned NumElts = VT.getVectorNumElements();
3912 // Only match 256-bit with 32/64-bit types
3913 if (!VT.is256BitVector() || (NumElts != 4 && NumElts != 8))
3916 unsigned NumLanes = VT.getSizeInBits()/128;
3917 unsigned LaneSize = NumElts/NumLanes;
3918 for (unsigned l = 0; l != NumElts; l += LaneSize) {
3919 for (unsigned i = 0; i != LaneSize; ++i) {
3920 if (!isUndefOrInRange(Mask[i+l], l, l+LaneSize))
3922 if (NumElts != 8 || l == 0)
3924 // VPERMILPS handling
3927 if (!isUndefOrEqual(Mask[i+l], Mask[i]+l))
3935 /// isCommutedMOVLMask - Returns true if the shuffle mask is except the reverse
3936 /// of what x86 movss want. X86 movs requires the lowest element to be lowest
3937 /// element of vector 2 and the other elements to come from vector 1 in order.
3938 static bool isCommutedMOVLMask(ArrayRef<int> Mask, EVT VT,
3939 bool V2IsSplat = false, bool V2IsUndef = false) {
3940 if (!VT.is128BitVector())
3943 unsigned NumOps = VT.getVectorNumElements();
3944 if (NumOps != 2 && NumOps != 4 && NumOps != 8 && NumOps != 16)
3947 if (!isUndefOrEqual(Mask[0], 0))
3950 for (unsigned i = 1; i != NumOps; ++i)
3951 if (!(isUndefOrEqual(Mask[i], i+NumOps) ||
3952 (V2IsUndef && isUndefOrInRange(Mask[i], NumOps, NumOps*2)) ||
3953 (V2IsSplat && isUndefOrEqual(Mask[i], NumOps))))
3959 /// isMOVSHDUPMask - Return true if the specified VECTOR_SHUFFLE operand
3960 /// specifies a shuffle of elements that is suitable for input to MOVSHDUP.
3961 /// Masks to match: <1, 1, 3, 3> or <1, 1, 3, 3, 5, 5, 7, 7>
3962 static bool isMOVSHDUPMask(ArrayRef<int> Mask, EVT VT,
3963 const X86Subtarget *Subtarget) {
3964 if (!Subtarget->hasSSE3())
3967 unsigned NumElems = VT.getVectorNumElements();
3969 if ((VT.is128BitVector() && NumElems != 4) ||
3970 (VT.is256BitVector() && NumElems != 8))
3973 // "i+1" is the value the indexed mask element must have
3974 for (unsigned i = 0; i != NumElems; i += 2)
3975 if (!isUndefOrEqual(Mask[i], i+1) ||
3976 !isUndefOrEqual(Mask[i+1], i+1))
3982 /// isMOVSLDUPMask - Return true if the specified VECTOR_SHUFFLE operand
3983 /// specifies a shuffle of elements that is suitable for input to MOVSLDUP.
3984 /// Masks to match: <0, 0, 2, 2> or <0, 0, 2, 2, 4, 4, 6, 6>
3985 static bool isMOVSLDUPMask(ArrayRef<int> Mask, EVT VT,
3986 const X86Subtarget *Subtarget) {
3987 if (!Subtarget->hasSSE3())
3990 unsigned NumElems = VT.getVectorNumElements();
3992 if ((VT.is128BitVector() && NumElems != 4) ||
3993 (VT.is256BitVector() && NumElems != 8))
3996 // "i" is the value the indexed mask element must have
3997 for (unsigned i = 0; i != NumElems; i += 2)
3998 if (!isUndefOrEqual(Mask[i], i) ||
3999 !isUndefOrEqual(Mask[i+1], i))
4005 /// isMOVDDUPYMask - Return true if the specified VECTOR_SHUFFLE operand
4006 /// specifies a shuffle of elements that is suitable for input to 256-bit
4007 /// version of MOVDDUP.
4008 static bool isMOVDDUPYMask(ArrayRef<int> Mask, EVT VT, bool HasFp256) {
4009 if (!HasFp256 || !VT.is256BitVector())
4012 unsigned NumElts = VT.getVectorNumElements();
4016 for (unsigned i = 0; i != NumElts/2; ++i)
4017 if (!isUndefOrEqual(Mask[i], 0))
4019 for (unsigned i = NumElts/2; i != NumElts; ++i)
4020 if (!isUndefOrEqual(Mask[i], NumElts/2))
4025 /// isMOVDDUPMask - Return true if the specified VECTOR_SHUFFLE operand
4026 /// specifies a shuffle of elements that is suitable for input to 128-bit
4027 /// version of MOVDDUP.
4028 static bool isMOVDDUPMask(ArrayRef<int> Mask, EVT VT) {
4029 if (!VT.is128BitVector())
4032 unsigned e = VT.getVectorNumElements() / 2;
4033 for (unsigned i = 0; i != e; ++i)
4034 if (!isUndefOrEqual(Mask[i], i))
4036 for (unsigned i = 0; i != e; ++i)
4037 if (!isUndefOrEqual(Mask[e+i], i))
4042 /// isVEXTRACTF128Index - Return true if the specified
4043 /// EXTRACT_SUBVECTOR operand specifies a vector extract that is
4044 /// suitable for input to VEXTRACTF128.
4045 bool X86::isVEXTRACTF128Index(SDNode *N) {
4046 if (!isa<ConstantSDNode>(N->getOperand(1).getNode()))
4049 // The index should be aligned on a 128-bit boundary.
4051 cast<ConstantSDNode>(N->getOperand(1).getNode())->getZExtValue();
4053 MVT VT = N->getValueType(0).getSimpleVT();
4054 unsigned ElSize = VT.getVectorElementType().getSizeInBits();
4055 bool Result = (Index * ElSize) % 128 == 0;
4060 /// isVINSERTF128Index - Return true if the specified INSERT_SUBVECTOR
4061 /// operand specifies a subvector insert that is suitable for input to
4063 bool X86::isVINSERTF128Index(SDNode *N) {
4064 if (!isa<ConstantSDNode>(N->getOperand(2).getNode()))
4067 // The index should be aligned on a 128-bit boundary.
4069 cast<ConstantSDNode>(N->getOperand(2).getNode())->getZExtValue();
4071 MVT VT = N->getValueType(0).getSimpleVT();
4072 unsigned ElSize = VT.getVectorElementType().getSizeInBits();
4073 bool Result = (Index * ElSize) % 128 == 0;
4078 /// getShuffleSHUFImmediate - Return the appropriate immediate to shuffle
4079 /// the specified VECTOR_SHUFFLE mask with PSHUF* and SHUFP* instructions.
4080 /// Handles 128-bit and 256-bit.
4081 static unsigned getShuffleSHUFImmediate(ShuffleVectorSDNode *N) {
4082 MVT VT = N->getValueType(0).getSimpleVT();
4084 assert((VT.is128BitVector() || VT.is256BitVector()) &&
4085 "Unsupported vector type for PSHUF/SHUFP");
4087 // Handle 128 and 256-bit vector lengths. AVX defines PSHUF/SHUFP to operate
4088 // independently on 128-bit lanes.
4089 unsigned NumElts = VT.getVectorNumElements();
4090 unsigned NumLanes = VT.getSizeInBits()/128;
4091 unsigned NumLaneElts = NumElts/NumLanes;
4093 assert((NumLaneElts == 2 || NumLaneElts == 4) &&
4094 "Only supports 2 or 4 elements per lane");
4096 unsigned Shift = (NumLaneElts == 4) ? 1 : 0;
4098 for (unsigned i = 0; i != NumElts; ++i) {
4099 int Elt = N->getMaskElt(i);
4100 if (Elt < 0) continue;
4101 Elt &= NumLaneElts - 1;
4102 unsigned ShAmt = (i << Shift) % 8;
4103 Mask |= Elt << ShAmt;
4109 /// getShufflePSHUFHWImmediate - Return the appropriate immediate to shuffle
4110 /// the specified VECTOR_SHUFFLE mask with the PSHUFHW instruction.
4111 static unsigned getShufflePSHUFHWImmediate(ShuffleVectorSDNode *N) {
4112 MVT VT = N->getValueType(0).getSimpleVT();
4114 assert((VT == MVT::v8i16 || VT == MVT::v16i16) &&
4115 "Unsupported vector type for PSHUFHW");
4117 unsigned NumElts = VT.getVectorNumElements();
4120 for (unsigned l = 0; l != NumElts; l += 8) {
4121 // 8 nodes per lane, but we only care about the last 4.
4122 for (unsigned i = 0; i < 4; ++i) {
4123 int Elt = N->getMaskElt(l+i+4);
4124 if (Elt < 0) continue;
4125 Elt &= 0x3; // only 2-bits.
4126 Mask |= Elt << (i * 2);
4133 /// getShufflePSHUFLWImmediate - Return the appropriate immediate to shuffle
4134 /// the specified VECTOR_SHUFFLE mask with the PSHUFLW instruction.
4135 static unsigned getShufflePSHUFLWImmediate(ShuffleVectorSDNode *N) {
4136 MVT VT = N->getValueType(0).getSimpleVT();
4138 assert((VT == MVT::v8i16 || VT == MVT::v16i16) &&
4139 "Unsupported vector type for PSHUFHW");
4141 unsigned NumElts = VT.getVectorNumElements();
4144 for (unsigned l = 0; l != NumElts; l += 8) {
4145 // 8 nodes per lane, but we only care about the first 4.
4146 for (unsigned i = 0; i < 4; ++i) {
4147 int Elt = N->getMaskElt(l+i);
4148 if (Elt < 0) continue;
4149 Elt &= 0x3; // only 2-bits
4150 Mask |= Elt << (i * 2);
4157 /// getShufflePALIGNRImmediate - Return the appropriate immediate to shuffle
4158 /// the specified VECTOR_SHUFFLE mask with the PALIGNR instruction.
4159 static unsigned getShufflePALIGNRImmediate(ShuffleVectorSDNode *SVOp) {
4160 MVT VT = SVOp->getValueType(0).getSimpleVT();
4161 unsigned EltSize = VT.getVectorElementType().getSizeInBits() >> 3;
4163 unsigned NumElts = VT.getVectorNumElements();
4164 unsigned NumLanes = VT.getSizeInBits()/128;
4165 unsigned NumLaneElts = NumElts/NumLanes;
4169 for (i = 0; i != NumElts; ++i) {
4170 Val = SVOp->getMaskElt(i);
4174 if (Val >= (int)NumElts)
4175 Val -= NumElts - NumLaneElts;
4177 assert(Val - i > 0 && "PALIGNR imm should be positive");
4178 return (Val - i) * EltSize;
4181 /// getExtractVEXTRACTF128Immediate - Return the appropriate immediate
4182 /// to extract the specified EXTRACT_SUBVECTOR index with VEXTRACTF128
4184 unsigned X86::getExtractVEXTRACTF128Immediate(SDNode *N) {
4185 if (!isa<ConstantSDNode>(N->getOperand(1).getNode()))
4186 llvm_unreachable("Illegal extract subvector for VEXTRACTF128");
4189 cast<ConstantSDNode>(N->getOperand(1).getNode())->getZExtValue();
4191 MVT VecVT = N->getOperand(0).getValueType().getSimpleVT();
4192 MVT ElVT = VecVT.getVectorElementType();
4194 unsigned NumElemsPerChunk = 128 / ElVT.getSizeInBits();
4195 return Index / NumElemsPerChunk;
4198 /// getInsertVINSERTF128Immediate - Return the appropriate immediate
4199 /// to insert at the specified INSERT_SUBVECTOR index with VINSERTF128
4201 unsigned X86::getInsertVINSERTF128Immediate(SDNode *N) {
4202 if (!isa<ConstantSDNode>(N->getOperand(2).getNode()))
4203 llvm_unreachable("Illegal insert subvector for VINSERTF128");
4206 cast<ConstantSDNode>(N->getOperand(2).getNode())->getZExtValue();
4208 MVT VecVT = N->getValueType(0).getSimpleVT();
4209 MVT ElVT = VecVT.getVectorElementType();
4211 unsigned NumElemsPerChunk = 128 / ElVT.getSizeInBits();
4212 return Index / NumElemsPerChunk;
4215 /// getShuffleCLImmediate - Return the appropriate immediate to shuffle
4216 /// the specified VECTOR_SHUFFLE mask with VPERMQ and VPERMPD instructions.
4217 /// Handles 256-bit.
4218 static unsigned getShuffleCLImmediate(ShuffleVectorSDNode *N) {
4219 MVT VT = N->getValueType(0).getSimpleVT();
4221 unsigned NumElts = VT.getVectorNumElements();
4223 assert((VT.is256BitVector() && NumElts == 4) &&
4224 "Unsupported vector type for VPERMQ/VPERMPD");
4227 for (unsigned i = 0; i != NumElts; ++i) {
4228 int Elt = N->getMaskElt(i);
4231 Mask |= Elt << (i*2);
4236 /// isZeroNode - Returns true if Elt is a constant zero or a floating point
4238 bool X86::isZeroNode(SDValue Elt) {
4239 if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(Elt))
4240 return CN->isNullValue();
4241 if (ConstantFPSDNode *CFP = dyn_cast<ConstantFPSDNode>(Elt))
4242 return CFP->getValueAPF().isPosZero();
4246 /// CommuteVectorShuffle - Swap vector_shuffle operands as well as values in
4247 /// their permute mask.
4248 static SDValue CommuteVectorShuffle(ShuffleVectorSDNode *SVOp,
4249 SelectionDAG &DAG) {
4250 MVT VT = SVOp->getValueType(0).getSimpleVT();
4251 unsigned NumElems = VT.getVectorNumElements();
4252 SmallVector<int, 8> MaskVec;
4254 for (unsigned i = 0; i != NumElems; ++i) {
4255 int Idx = SVOp->getMaskElt(i);
4257 if (Idx < (int)NumElems)
4262 MaskVec.push_back(Idx);
4264 return DAG.getVectorShuffle(VT, SVOp->getDebugLoc(), SVOp->getOperand(1),
4265 SVOp->getOperand(0), &MaskVec[0]);
4268 /// ShouldXformToMOVHLPS - Return true if the node should be transformed to
4269 /// match movhlps. The lower half elements should come from upper half of
4270 /// V1 (and in order), and the upper half elements should come from the upper
4271 /// half of V2 (and in order).
4272 static bool ShouldXformToMOVHLPS(ArrayRef<int> Mask, EVT VT) {
4273 if (!VT.is128BitVector())
4275 if (VT.getVectorNumElements() != 4)
4277 for (unsigned i = 0, e = 2; i != e; ++i)
4278 if (!isUndefOrEqual(Mask[i], i+2))
4280 for (unsigned i = 2; i != 4; ++i)
4281 if (!isUndefOrEqual(Mask[i], i+4))
4286 /// isScalarLoadToVector - Returns true if the node is a scalar load that
4287 /// is promoted to a vector. It also returns the LoadSDNode by reference if
4289 static bool isScalarLoadToVector(SDNode *N, LoadSDNode **LD = NULL) {
4290 if (N->getOpcode() != ISD::SCALAR_TO_VECTOR)
4292 N = N->getOperand(0).getNode();
4293 if (!ISD::isNON_EXTLoad(N))
4296 *LD = cast<LoadSDNode>(N);
4300 // Test whether the given value is a vector value which will be legalized
4302 static bool WillBeConstantPoolLoad(SDNode *N) {
4303 if (N->getOpcode() != ISD::BUILD_VECTOR)
4306 // Check for any non-constant elements.
4307 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i)
4308 switch (N->getOperand(i).getNode()->getOpcode()) {
4310 case ISD::ConstantFP:
4317 // Vectors of all-zeros and all-ones are materialized with special
4318 // instructions rather than being loaded.
4319 return !ISD::isBuildVectorAllZeros(N) &&
4320 !ISD::isBuildVectorAllOnes(N);
4323 /// ShouldXformToMOVLP{S|D} - Return true if the node should be transformed to
4324 /// match movlp{s|d}. The lower half elements should come from lower half of
4325 /// V1 (and in order), and the upper half elements should come from the upper
4326 /// half of V2 (and in order). And since V1 will become the source of the
4327 /// MOVLP, it must be either a vector load or a scalar load to vector.
4328 static bool ShouldXformToMOVLP(SDNode *V1, SDNode *V2,
4329 ArrayRef<int> Mask, EVT VT) {
4330 if (!VT.is128BitVector())
4333 if (!ISD::isNON_EXTLoad(V1) && !isScalarLoadToVector(V1))
4335 // Is V2 is a vector load, don't do this transformation. We will try to use
4336 // load folding shufps op.
4337 if (ISD::isNON_EXTLoad(V2) || WillBeConstantPoolLoad(V2))
4340 unsigned NumElems = VT.getVectorNumElements();
4342 if (NumElems != 2 && NumElems != 4)
4344 for (unsigned i = 0, e = NumElems/2; i != e; ++i)
4345 if (!isUndefOrEqual(Mask[i], i))
4347 for (unsigned i = NumElems/2, e = NumElems; i != e; ++i)
4348 if (!isUndefOrEqual(Mask[i], i+NumElems))
4353 /// isSplatVector - Returns true if N is a BUILD_VECTOR node whose elements are
4355 static bool isSplatVector(SDNode *N) {
4356 if (N->getOpcode() != ISD::BUILD_VECTOR)
4359 SDValue SplatValue = N->getOperand(0);
4360 for (unsigned i = 1, e = N->getNumOperands(); i != e; ++i)
4361 if (N->getOperand(i) != SplatValue)
4366 /// isZeroShuffle - Returns true if N is a VECTOR_SHUFFLE that can be resolved
4367 /// to an zero vector.
4368 /// FIXME: move to dag combiner / method on ShuffleVectorSDNode
4369 static bool isZeroShuffle(ShuffleVectorSDNode *N) {
4370 SDValue V1 = N->getOperand(0);
4371 SDValue V2 = N->getOperand(1);
4372 unsigned NumElems = N->getValueType(0).getVectorNumElements();
4373 for (unsigned i = 0; i != NumElems; ++i) {
4374 int Idx = N->getMaskElt(i);
4375 if (Idx >= (int)NumElems) {
4376 unsigned Opc = V2.getOpcode();
4377 if (Opc == ISD::UNDEF || ISD::isBuildVectorAllZeros(V2.getNode()))
4379 if (Opc != ISD::BUILD_VECTOR ||
4380 !X86::isZeroNode(V2.getOperand(Idx-NumElems)))
4382 } else if (Idx >= 0) {
4383 unsigned Opc = V1.getOpcode();
4384 if (Opc == ISD::UNDEF || ISD::isBuildVectorAllZeros(V1.getNode()))
4386 if (Opc != ISD::BUILD_VECTOR ||
4387 !X86::isZeroNode(V1.getOperand(Idx)))
4394 /// getZeroVector - Returns a vector of specified type with all zero elements.
4396 static SDValue getZeroVector(EVT VT, const X86Subtarget *Subtarget,
4397 SelectionDAG &DAG, DebugLoc dl) {
4398 assert(VT.isVector() && "Expected a vector type");
4400 // Always build SSE zero vectors as <4 x i32> bitcasted
4401 // to their dest type. This ensures they get CSE'd.
4403 if (VT.is128BitVector()) { // SSE
4404 if (Subtarget->hasSSE2()) { // SSE2
4405 SDValue Cst = DAG.getTargetConstant(0, MVT::i32);
4406 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, Cst, Cst, Cst, Cst);
4408 SDValue Cst = DAG.getTargetConstantFP(+0.0, MVT::f32);
4409 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4f32, Cst, Cst, Cst, Cst);
4411 } else if (VT.is256BitVector()) { // AVX
4412 if (Subtarget->hasInt256()) { // AVX2
4413 SDValue Cst = DAG.getTargetConstant(0, MVT::i32);
4414 SDValue Ops[] = { Cst, Cst, Cst, Cst, Cst, Cst, Cst, Cst };
4415 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v8i32, Ops, 8);
4417 // 256-bit logic and arithmetic instructions in AVX are all
4418 // floating-point, no support for integer ops. Emit fp zeroed vectors.
4419 SDValue Cst = DAG.getTargetConstantFP(+0.0, MVT::f32);
4420 SDValue Ops[] = { Cst, Cst, Cst, Cst, Cst, Cst, Cst, Cst };
4421 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v8f32, Ops, 8);
4424 llvm_unreachable("Unexpected vector type");
4426 return DAG.getNode(ISD::BITCAST, dl, VT, Vec);
4429 /// getOnesVector - Returns a vector of specified type with all bits set.
4430 /// Always build ones vectors as <4 x i32> or <8 x i32>. For 256-bit types with
4431 /// no AVX2 supprt, use two <4 x i32> inserted in a <8 x i32> appropriately.
4432 /// Then bitcast to their original type, ensuring they get CSE'd.
4433 static SDValue getOnesVector(MVT VT, bool HasInt256, SelectionDAG &DAG,
4435 assert(VT.isVector() && "Expected a vector type");
4437 SDValue Cst = DAG.getTargetConstant(~0U, MVT::i32);
4439 if (VT.is256BitVector()) {
4440 if (HasInt256) { // AVX2
4441 SDValue Ops[] = { Cst, Cst, Cst, Cst, Cst, Cst, Cst, Cst };
4442 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v8i32, Ops, 8);
4444 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, Cst, Cst, Cst, Cst);
4445 Vec = Concat128BitVectors(Vec, Vec, MVT::v8i32, 8, DAG, dl);
4447 } else if (VT.is128BitVector()) {
4448 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, Cst, Cst, Cst, Cst);
4450 llvm_unreachable("Unexpected vector type");
4452 return DAG.getNode(ISD::BITCAST, dl, VT, Vec);
4455 /// NormalizeMask - V2 is a splat, modify the mask (if needed) so all elements
4456 /// that point to V2 points to its first element.
4457 static void NormalizeMask(SmallVectorImpl<int> &Mask, unsigned NumElems) {
4458 for (unsigned i = 0; i != NumElems; ++i) {
4459 if (Mask[i] > (int)NumElems) {
4465 /// getMOVLMask - Returns a vector_shuffle mask for an movs{s|d}, movd
4466 /// operation of specified width.
4467 static SDValue getMOVL(SelectionDAG &DAG, DebugLoc dl, EVT VT, SDValue V1,
4469 unsigned NumElems = VT.getVectorNumElements();
4470 SmallVector<int, 8> Mask;
4471 Mask.push_back(NumElems);
4472 for (unsigned i = 1; i != NumElems; ++i)
4474 return DAG.getVectorShuffle(VT, dl, V1, V2, &Mask[0]);
4477 /// getUnpackl - Returns a vector_shuffle node for an unpackl operation.
4478 static SDValue getUnpackl(SelectionDAG &DAG, DebugLoc dl, EVT VT, SDValue V1,
4480 unsigned NumElems = VT.getVectorNumElements();
4481 SmallVector<int, 8> Mask;
4482 for (unsigned i = 0, e = NumElems/2; i != e; ++i) {
4484 Mask.push_back(i + NumElems);
4486 return DAG.getVectorShuffle(VT, dl, V1, V2, &Mask[0]);
4489 /// getUnpackh - Returns a vector_shuffle node for an unpackh operation.
4490 static SDValue getUnpackh(SelectionDAG &DAG, DebugLoc dl, EVT VT, SDValue V1,
4492 unsigned NumElems = VT.getVectorNumElements();
4493 SmallVector<int, 8> Mask;
4494 for (unsigned i = 0, Half = NumElems/2; i != Half; ++i) {
4495 Mask.push_back(i + Half);
4496 Mask.push_back(i + NumElems + Half);
4498 return DAG.getVectorShuffle(VT, dl, V1, V2, &Mask[0]);
4501 // PromoteSplati8i16 - All i16 and i8 vector types can't be used directly by
4502 // a generic shuffle instruction because the target has no such instructions.
4503 // Generate shuffles which repeat i16 and i8 several times until they can be
4504 // represented by v4f32 and then be manipulated by target suported shuffles.
4505 static SDValue PromoteSplati8i16(SDValue V, SelectionDAG &DAG, int &EltNo) {
4506 EVT VT = V.getValueType();
4507 int NumElems = VT.getVectorNumElements();
4508 DebugLoc dl = V.getDebugLoc();
4510 while (NumElems > 4) {
4511 if (EltNo < NumElems/2) {
4512 V = getUnpackl(DAG, dl, VT, V, V);
4514 V = getUnpackh(DAG, dl, VT, V, V);
4515 EltNo -= NumElems/2;
4522 /// getLegalSplat - Generate a legal splat with supported x86 shuffles
4523 static SDValue getLegalSplat(SelectionDAG &DAG, SDValue V, int EltNo) {
4524 EVT VT = V.getValueType();
4525 DebugLoc dl = V.getDebugLoc();
4527 if (VT.is128BitVector()) {
4528 V = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, V);
4529 int SplatMask[4] = { EltNo, EltNo, EltNo, EltNo };
4530 V = DAG.getVectorShuffle(MVT::v4f32, dl, V, DAG.getUNDEF(MVT::v4f32),
4532 } else if (VT.is256BitVector()) {
4533 // To use VPERMILPS to splat scalars, the second half of indicies must
4534 // refer to the higher part, which is a duplication of the lower one,
4535 // because VPERMILPS can only handle in-lane permutations.
4536 int SplatMask[8] = { EltNo, EltNo, EltNo, EltNo,
4537 EltNo+4, EltNo+4, EltNo+4, EltNo+4 };
4539 V = DAG.getNode(ISD::BITCAST, dl, MVT::v8f32, V);
4540 V = DAG.getVectorShuffle(MVT::v8f32, dl, V, DAG.getUNDEF(MVT::v8f32),
4543 llvm_unreachable("Vector size not supported");
4545 return DAG.getNode(ISD::BITCAST, dl, VT, V);
4548 /// PromoteSplat - Splat is promoted to target supported vector shuffles.
4549 static SDValue PromoteSplat(ShuffleVectorSDNode *SV, SelectionDAG &DAG) {
4550 EVT SrcVT = SV->getValueType(0);
4551 SDValue V1 = SV->getOperand(0);
4552 DebugLoc dl = SV->getDebugLoc();
4554 int EltNo = SV->getSplatIndex();
4555 int NumElems = SrcVT.getVectorNumElements();
4556 bool Is256BitVec = SrcVT.is256BitVector();
4558 assert(((SrcVT.is128BitVector() && NumElems > 4) || Is256BitVec) &&
4559 "Unknown how to promote splat for type");
4561 // Extract the 128-bit part containing the splat element and update
4562 // the splat element index when it refers to the higher register.
4564 V1 = Extract128BitVector(V1, EltNo, DAG, dl);
4565 if (EltNo >= NumElems/2)
4566 EltNo -= NumElems/2;
4569 // All i16 and i8 vector types can't be used directly by a generic shuffle
4570 // instruction because the target has no such instruction. Generate shuffles
4571 // which repeat i16 and i8 several times until they fit in i32, and then can
4572 // be manipulated by target suported shuffles.
4573 EVT EltVT = SrcVT.getVectorElementType();
4574 if (EltVT == MVT::i8 || EltVT == MVT::i16)
4575 V1 = PromoteSplati8i16(V1, DAG, EltNo);
4577 // Recreate the 256-bit vector and place the same 128-bit vector
4578 // into the low and high part. This is necessary because we want
4579 // to use VPERM* to shuffle the vectors
4581 V1 = DAG.getNode(ISD::CONCAT_VECTORS, dl, SrcVT, V1, V1);
4584 return getLegalSplat(DAG, V1, EltNo);
4587 /// getShuffleVectorZeroOrUndef - Return a vector_shuffle of the specified
4588 /// vector of zero or undef vector. This produces a shuffle where the low
4589 /// element of V2 is swizzled into the zero/undef vector, landing at element
4590 /// Idx. This produces a shuffle mask like 4,1,2,3 (idx=0) or 0,1,2,4 (idx=3).
4591 static SDValue getShuffleVectorZeroOrUndef(SDValue V2, unsigned Idx,
4593 const X86Subtarget *Subtarget,
4594 SelectionDAG &DAG) {
4595 EVT VT = V2.getValueType();
4597 ? getZeroVector(VT, Subtarget, DAG, V2.getDebugLoc()) : DAG.getUNDEF(VT);
4598 unsigned NumElems = VT.getVectorNumElements();
4599 SmallVector<int, 16> MaskVec;
4600 for (unsigned i = 0; i != NumElems; ++i)
4601 // If this is the insertion idx, put the low elt of V2 here.
4602 MaskVec.push_back(i == Idx ? NumElems : i);
4603 return DAG.getVectorShuffle(VT, V2.getDebugLoc(), V1, V2, &MaskVec[0]);
4606 /// getTargetShuffleMask - Calculates the shuffle mask corresponding to the
4607 /// target specific opcode. Returns true if the Mask could be calculated.
4608 /// Sets IsUnary to true if only uses one source.
4609 static bool getTargetShuffleMask(SDNode *N, MVT VT,
4610 SmallVectorImpl<int> &Mask, bool &IsUnary) {
4611 unsigned NumElems = VT.getVectorNumElements();
4615 switch(N->getOpcode()) {
4617 ImmN = N->getOperand(N->getNumOperands()-1);
4618 DecodeSHUFPMask(VT, cast<ConstantSDNode>(ImmN)->getZExtValue(), Mask);
4620 case X86ISD::UNPCKH:
4621 DecodeUNPCKHMask(VT, Mask);
4623 case X86ISD::UNPCKL:
4624 DecodeUNPCKLMask(VT, Mask);
4626 case X86ISD::MOVHLPS:
4627 DecodeMOVHLPSMask(NumElems, Mask);
4629 case X86ISD::MOVLHPS:
4630 DecodeMOVLHPSMask(NumElems, Mask);
4632 case X86ISD::PALIGNR:
4633 ImmN = N->getOperand(N->getNumOperands()-1);
4634 DecodePALIGNRMask(VT, cast<ConstantSDNode>(ImmN)->getZExtValue(), Mask);
4636 case X86ISD::PSHUFD:
4637 case X86ISD::VPERMILP:
4638 ImmN = N->getOperand(N->getNumOperands()-1);
4639 DecodePSHUFMask(VT, cast<ConstantSDNode>(ImmN)->getZExtValue(), Mask);
4642 case X86ISD::PSHUFHW:
4643 ImmN = N->getOperand(N->getNumOperands()-1);
4644 DecodePSHUFHWMask(VT, cast<ConstantSDNode>(ImmN)->getZExtValue(), Mask);
4647 case X86ISD::PSHUFLW:
4648 ImmN = N->getOperand(N->getNumOperands()-1);
4649 DecodePSHUFLWMask(VT, cast<ConstantSDNode>(ImmN)->getZExtValue(), Mask);
4652 case X86ISD::VPERMI:
4653 ImmN = N->getOperand(N->getNumOperands()-1);
4654 DecodeVPERMMask(cast<ConstantSDNode>(ImmN)->getZExtValue(), Mask);
4658 case X86ISD::MOVSD: {
4659 // The index 0 always comes from the first element of the second source,
4660 // this is why MOVSS and MOVSD are used in the first place. The other
4661 // elements come from the other positions of the first source vector
4662 Mask.push_back(NumElems);
4663 for (unsigned i = 1; i != NumElems; ++i) {
4668 case X86ISD::VPERM2X128:
4669 ImmN = N->getOperand(N->getNumOperands()-1);
4670 DecodeVPERM2X128Mask(VT, cast<ConstantSDNode>(ImmN)->getZExtValue(), Mask);
4671 if (Mask.empty()) return false;
4673 case X86ISD::MOVDDUP:
4674 case X86ISD::MOVLHPD:
4675 case X86ISD::MOVLPD:
4676 case X86ISD::MOVLPS:
4677 case X86ISD::MOVSHDUP:
4678 case X86ISD::MOVSLDUP:
4679 // Not yet implemented
4681 default: llvm_unreachable("unknown target shuffle node");
4687 /// getShuffleScalarElt - Returns the scalar element that will make up the ith
4688 /// element of the result of the vector shuffle.
4689 static SDValue getShuffleScalarElt(SDNode *N, unsigned Index, SelectionDAG &DAG,
4692 return SDValue(); // Limit search depth.
4694 SDValue V = SDValue(N, 0);
4695 EVT VT = V.getValueType();
4696 unsigned Opcode = V.getOpcode();
4698 // Recurse into ISD::VECTOR_SHUFFLE node to find scalars.
4699 if (const ShuffleVectorSDNode *SV = dyn_cast<ShuffleVectorSDNode>(N)) {
4700 int Elt = SV->getMaskElt(Index);
4703 return DAG.getUNDEF(VT.getVectorElementType());
4705 unsigned NumElems = VT.getVectorNumElements();
4706 SDValue NewV = (Elt < (int)NumElems) ? SV->getOperand(0)
4707 : SV->getOperand(1);
4708 return getShuffleScalarElt(NewV.getNode(), Elt % NumElems, DAG, Depth+1);
4711 // Recurse into target specific vector shuffles to find scalars.
4712 if (isTargetShuffle(Opcode)) {
4713 MVT ShufVT = V.getValueType().getSimpleVT();
4714 unsigned NumElems = ShufVT.getVectorNumElements();
4715 SmallVector<int, 16> ShuffleMask;
4718 if (!getTargetShuffleMask(N, ShufVT, ShuffleMask, IsUnary))
4721 int Elt = ShuffleMask[Index];
4723 return DAG.getUNDEF(ShufVT.getVectorElementType());
4725 SDValue NewV = (Elt < (int)NumElems) ? N->getOperand(0)
4727 return getShuffleScalarElt(NewV.getNode(), Elt % NumElems, DAG,
4731 // Actual nodes that may contain scalar elements
4732 if (Opcode == ISD::BITCAST) {
4733 V = V.getOperand(0);
4734 EVT SrcVT = V.getValueType();
4735 unsigned NumElems = VT.getVectorNumElements();
4737 if (!SrcVT.isVector() || SrcVT.getVectorNumElements() != NumElems)
4741 if (V.getOpcode() == ISD::SCALAR_TO_VECTOR)
4742 return (Index == 0) ? V.getOperand(0)
4743 : DAG.getUNDEF(VT.getVectorElementType());
4745 if (V.getOpcode() == ISD::BUILD_VECTOR)
4746 return V.getOperand(Index);
4751 /// getNumOfConsecutiveZeros - Return the number of elements of a vector
4752 /// shuffle operation which come from a consecutively from a zero. The
4753 /// search can start in two different directions, from left or right.
4755 unsigned getNumOfConsecutiveZeros(ShuffleVectorSDNode *SVOp, unsigned NumElems,
4756 bool ZerosFromLeft, SelectionDAG &DAG) {
4758 for (i = 0; i != NumElems; ++i) {
4759 unsigned Index = ZerosFromLeft ? i : NumElems-i-1;
4760 SDValue Elt = getShuffleScalarElt(SVOp, Index, DAG, 0);
4761 if (!(Elt.getNode() &&
4762 (Elt.getOpcode() == ISD::UNDEF || X86::isZeroNode(Elt))))
4769 /// isShuffleMaskConsecutive - Check if the shuffle mask indicies [MaskI, MaskE)
4770 /// correspond consecutively to elements from one of the vector operands,
4771 /// starting from its index OpIdx. Also tell OpNum which source vector operand.
4773 bool isShuffleMaskConsecutive(ShuffleVectorSDNode *SVOp,
4774 unsigned MaskI, unsigned MaskE, unsigned OpIdx,
4775 unsigned NumElems, unsigned &OpNum) {
4776 bool SeenV1 = false;
4777 bool SeenV2 = false;
4779 for (unsigned i = MaskI; i != MaskE; ++i, ++OpIdx) {
4780 int Idx = SVOp->getMaskElt(i);
4781 // Ignore undef indicies
4785 if (Idx < (int)NumElems)
4790 // Only accept consecutive elements from the same vector
4791 if ((Idx % NumElems != OpIdx) || (SeenV1 && SeenV2))
4795 OpNum = SeenV1 ? 0 : 1;
4799 /// isVectorShiftRight - Returns true if the shuffle can be implemented as a
4800 /// logical left shift of a vector.
4801 static bool isVectorShiftRight(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG,
4802 bool &isLeft, SDValue &ShVal, unsigned &ShAmt) {
4803 unsigned NumElems = SVOp->getValueType(0).getVectorNumElements();
4804 unsigned NumZeros = getNumOfConsecutiveZeros(SVOp, NumElems,
4805 false /* check zeros from right */, DAG);
4811 // Considering the elements in the mask that are not consecutive zeros,
4812 // check if they consecutively come from only one of the source vectors.
4814 // V1 = {X, A, B, C} 0
4816 // vector_shuffle V1, V2 <1, 2, 3, X>
4818 if (!isShuffleMaskConsecutive(SVOp,
4819 0, // Mask Start Index
4820 NumElems-NumZeros, // Mask End Index(exclusive)
4821 NumZeros, // Where to start looking in the src vector
4822 NumElems, // Number of elements in vector
4823 OpSrc)) // Which source operand ?
4828 ShVal = SVOp->getOperand(OpSrc);
4832 /// isVectorShiftLeft - Returns true if the shuffle can be implemented as a
4833 /// logical left shift of a vector.
4834 static bool isVectorShiftLeft(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG,
4835 bool &isLeft, SDValue &ShVal, unsigned &ShAmt) {
4836 unsigned NumElems = SVOp->getValueType(0).getVectorNumElements();
4837 unsigned NumZeros = getNumOfConsecutiveZeros(SVOp, NumElems,
4838 true /* check zeros from left */, DAG);
4844 // Considering the elements in the mask that are not consecutive zeros,
4845 // check if they consecutively come from only one of the source vectors.
4847 // 0 { A, B, X, X } = V2
4849 // vector_shuffle V1, V2 <X, X, 4, 5>
4851 if (!isShuffleMaskConsecutive(SVOp,
4852 NumZeros, // Mask Start Index
4853 NumElems, // Mask End Index(exclusive)
4854 0, // Where to start looking in the src vector
4855 NumElems, // Number of elements in vector
4856 OpSrc)) // Which source operand ?
4861 ShVal = SVOp->getOperand(OpSrc);
4865 /// isVectorShift - Returns true if the shuffle can be implemented as a
4866 /// logical left or right shift of a vector.
4867 static bool isVectorShift(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG,
4868 bool &isLeft, SDValue &ShVal, unsigned &ShAmt) {
4869 // Although the logic below support any bitwidth size, there are no
4870 // shift instructions which handle more than 128-bit vectors.
4871 if (!SVOp->getValueType(0).is128BitVector())
4874 if (isVectorShiftLeft(SVOp, DAG, isLeft, ShVal, ShAmt) ||
4875 isVectorShiftRight(SVOp, DAG, isLeft, ShVal, ShAmt))
4881 /// LowerBuildVectorv16i8 - Custom lower build_vector of v16i8.
4883 static SDValue LowerBuildVectorv16i8(SDValue Op, unsigned NonZeros,
4884 unsigned NumNonZero, unsigned NumZero,
4886 const X86Subtarget* Subtarget,
4887 const TargetLowering &TLI) {
4891 DebugLoc dl = Op.getDebugLoc();
4894 for (unsigned i = 0; i < 16; ++i) {
4895 bool ThisIsNonZero = (NonZeros & (1 << i)) != 0;
4896 if (ThisIsNonZero && First) {
4898 V = getZeroVector(MVT::v8i16, Subtarget, DAG, dl);
4900 V = DAG.getUNDEF(MVT::v8i16);
4905 SDValue ThisElt(0, 0), LastElt(0, 0);
4906 bool LastIsNonZero = (NonZeros & (1 << (i-1))) != 0;
4907 if (LastIsNonZero) {
4908 LastElt = DAG.getNode(ISD::ZERO_EXTEND, dl,
4909 MVT::i16, Op.getOperand(i-1));
4911 if (ThisIsNonZero) {
4912 ThisElt = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i16, Op.getOperand(i));
4913 ThisElt = DAG.getNode(ISD::SHL, dl, MVT::i16,
4914 ThisElt, DAG.getConstant(8, MVT::i8));
4916 ThisElt = DAG.getNode(ISD::OR, dl, MVT::i16, ThisElt, LastElt);
4920 if (ThisElt.getNode())
4921 V = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, V, ThisElt,
4922 DAG.getIntPtrConstant(i/2));
4926 return DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, V);
4929 /// LowerBuildVectorv8i16 - Custom lower build_vector of v8i16.
4931 static SDValue LowerBuildVectorv8i16(SDValue Op, unsigned NonZeros,
4932 unsigned NumNonZero, unsigned NumZero,
4934 const X86Subtarget* Subtarget,
4935 const TargetLowering &TLI) {
4939 DebugLoc dl = Op.getDebugLoc();
4942 for (unsigned i = 0; i < 8; ++i) {
4943 bool isNonZero = (NonZeros & (1 << i)) != 0;
4947 V = getZeroVector(MVT::v8i16, Subtarget, DAG, dl);
4949 V = DAG.getUNDEF(MVT::v8i16);
4952 V = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl,
4953 MVT::v8i16, V, Op.getOperand(i),
4954 DAG.getIntPtrConstant(i));
4961 /// getVShift - Return a vector logical shift node.
4963 static SDValue getVShift(bool isLeft, EVT VT, SDValue SrcOp,
4964 unsigned NumBits, SelectionDAG &DAG,
4965 const TargetLowering &TLI, DebugLoc dl) {
4966 assert(VT.is128BitVector() && "Unknown type for VShift");
4967 EVT ShVT = MVT::v2i64;
4968 unsigned Opc = isLeft ? X86ISD::VSHLDQ : X86ISD::VSRLDQ;
4969 SrcOp = DAG.getNode(ISD::BITCAST, dl, ShVT, SrcOp);
4970 return DAG.getNode(ISD::BITCAST, dl, VT,
4971 DAG.getNode(Opc, dl, ShVT, SrcOp,
4972 DAG.getConstant(NumBits,
4973 TLI.getScalarShiftAmountTy(SrcOp.getValueType()))));
4977 X86TargetLowering::LowerAsSplatVectorLoad(SDValue SrcOp, EVT VT, DebugLoc dl,
4978 SelectionDAG &DAG) const {
4980 // Check if the scalar load can be widened into a vector load. And if
4981 // the address is "base + cst" see if the cst can be "absorbed" into
4982 // the shuffle mask.
4983 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(SrcOp)) {
4984 SDValue Ptr = LD->getBasePtr();
4985 if (!ISD::isNormalLoad(LD) || LD->isVolatile())
4987 EVT PVT = LD->getValueType(0);
4988 if (PVT != MVT::i32 && PVT != MVT::f32)
4993 if (FrameIndexSDNode *FINode = dyn_cast<FrameIndexSDNode>(Ptr)) {
4994 FI = FINode->getIndex();
4996 } else if (DAG.isBaseWithConstantOffset(Ptr) &&
4997 isa<FrameIndexSDNode>(Ptr.getOperand(0))) {
4998 FI = cast<FrameIndexSDNode>(Ptr.getOperand(0))->getIndex();
4999 Offset = Ptr.getConstantOperandVal(1);
5000 Ptr = Ptr.getOperand(0);
5005 // FIXME: 256-bit vector instructions don't require a strict alignment,
5006 // improve this code to support it better.
5007 unsigned RequiredAlign = VT.getSizeInBits()/8;
5008 SDValue Chain = LD->getChain();
5009 // Make sure the stack object alignment is at least 16 or 32.
5010 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
5011 if (DAG.InferPtrAlignment(Ptr) < RequiredAlign) {
5012 if (MFI->isFixedObjectIndex(FI)) {
5013 // Can't change the alignment. FIXME: It's possible to compute
5014 // the exact stack offset and reference FI + adjust offset instead.
5015 // If someone *really* cares about this. That's the way to implement it.
5018 MFI->setObjectAlignment(FI, RequiredAlign);
5022 // (Offset % 16 or 32) must be multiple of 4. Then address is then
5023 // Ptr + (Offset & ~15).
5026 if ((Offset % RequiredAlign) & 3)
5028 int64_t StartOffset = Offset & ~(RequiredAlign-1);
5030 Ptr = DAG.getNode(ISD::ADD, Ptr.getDebugLoc(), Ptr.getValueType(),
5031 Ptr,DAG.getConstant(StartOffset, Ptr.getValueType()));
5033 int EltNo = (Offset - StartOffset) >> 2;
5034 unsigned NumElems = VT.getVectorNumElements();
5036 EVT NVT = EVT::getVectorVT(*DAG.getContext(), PVT, NumElems);
5037 SDValue V1 = DAG.getLoad(NVT, dl, Chain, Ptr,
5038 LD->getPointerInfo().getWithOffset(StartOffset),
5039 false, false, false, 0);
5041 SmallVector<int, 8> Mask;
5042 for (unsigned i = 0; i != NumElems; ++i)
5043 Mask.push_back(EltNo);
5045 return DAG.getVectorShuffle(NVT, dl, V1, DAG.getUNDEF(NVT), &Mask[0]);
5051 /// EltsFromConsecutiveLoads - Given the initializing elements 'Elts' of a
5052 /// vector of type 'VT', see if the elements can be replaced by a single large
5053 /// load which has the same value as a build_vector whose operands are 'elts'.
5055 /// Example: <load i32 *a, load i32 *a+4, undef, undef> -> zextload a
5057 /// FIXME: we'd also like to handle the case where the last elements are zero
5058 /// rather than undef via VZEXT_LOAD, but we do not detect that case today.
5059 /// There's even a handy isZeroNode for that purpose.
5060 static SDValue EltsFromConsecutiveLoads(EVT VT, SmallVectorImpl<SDValue> &Elts,
5061 DebugLoc &DL, SelectionDAG &DAG) {
5062 EVT EltVT = VT.getVectorElementType();
5063 unsigned NumElems = Elts.size();
5065 LoadSDNode *LDBase = NULL;
5066 unsigned LastLoadedElt = -1U;
5068 // For each element in the initializer, see if we've found a load or an undef.
5069 // If we don't find an initial load element, or later load elements are
5070 // non-consecutive, bail out.
5071 for (unsigned i = 0; i < NumElems; ++i) {
5072 SDValue Elt = Elts[i];
5074 if (!Elt.getNode() ||
5075 (Elt.getOpcode() != ISD::UNDEF && !ISD::isNON_EXTLoad(Elt.getNode())))
5078 if (Elt.getNode()->getOpcode() == ISD::UNDEF)
5080 LDBase = cast<LoadSDNode>(Elt.getNode());
5084 if (Elt.getOpcode() == ISD::UNDEF)
5087 LoadSDNode *LD = cast<LoadSDNode>(Elt);
5088 if (!DAG.isConsecutiveLoad(LD, LDBase, EltVT.getSizeInBits()/8, i))
5093 // If we have found an entire vector of loads and undefs, then return a large
5094 // load of the entire vector width starting at the base pointer. If we found
5095 // consecutive loads for the low half, generate a vzext_load node.
5096 if (LastLoadedElt == NumElems - 1) {
5097 if (DAG.InferPtrAlignment(LDBase->getBasePtr()) >= 16)
5098 return DAG.getLoad(VT, DL, LDBase->getChain(), LDBase->getBasePtr(),
5099 LDBase->getPointerInfo(),
5100 LDBase->isVolatile(), LDBase->isNonTemporal(),
5101 LDBase->isInvariant(), 0);
5102 return DAG.getLoad(VT, DL, LDBase->getChain(), LDBase->getBasePtr(),
5103 LDBase->getPointerInfo(),
5104 LDBase->isVolatile(), LDBase->isNonTemporal(),
5105 LDBase->isInvariant(), LDBase->getAlignment());
5107 if (NumElems == 4 && LastLoadedElt == 1 &&
5108 DAG.getTargetLoweringInfo().isTypeLegal(MVT::v2i64)) {
5109 SDVTList Tys = DAG.getVTList(MVT::v2i64, MVT::Other);
5110 SDValue Ops[] = { LDBase->getChain(), LDBase->getBasePtr() };
5112 DAG.getMemIntrinsicNode(X86ISD::VZEXT_LOAD, DL, Tys, Ops, 2, MVT::i64,
5113 LDBase->getPointerInfo(),
5114 LDBase->getAlignment(),
5115 false/*isVolatile*/, true/*ReadMem*/,
5118 // Make sure the newly-created LOAD is in the same position as LDBase in
5119 // terms of dependency. We create a TokenFactor for LDBase and ResNode, and
5120 // update uses of LDBase's output chain to use the TokenFactor.
5121 if (LDBase->hasAnyUseOfValue(1)) {
5122 SDValue NewChain = DAG.getNode(ISD::TokenFactor, DL, MVT::Other,
5123 SDValue(LDBase, 1), SDValue(ResNode.getNode(), 1));
5124 DAG.ReplaceAllUsesOfValueWith(SDValue(LDBase, 1), NewChain);
5125 DAG.UpdateNodeOperands(NewChain.getNode(), SDValue(LDBase, 1),
5126 SDValue(ResNode.getNode(), 1));
5129 return DAG.getNode(ISD::BITCAST, DL, VT, ResNode);
5134 /// LowerVectorBroadcast - Attempt to use the vbroadcast instruction
5135 /// to generate a splat value for the following cases:
5136 /// 1. A splat BUILD_VECTOR which uses a single scalar load, or a constant.
5137 /// 2. A splat shuffle which uses a scalar_to_vector node which comes from
5138 /// a scalar load, or a constant.
5139 /// The VBROADCAST node is returned when a pattern is found,
5140 /// or SDValue() otherwise.
5142 X86TargetLowering::LowerVectorBroadcast(SDValue Op, SelectionDAG &DAG) const {
5143 if (!Subtarget->hasFp256())
5146 MVT VT = Op.getValueType().getSimpleVT();
5147 DebugLoc dl = Op.getDebugLoc();
5149 assert((VT.is128BitVector() || VT.is256BitVector()) &&
5150 "Unsupported vector type for broadcast.");
5155 switch (Op.getOpcode()) {
5157 // Unknown pattern found.
5160 case ISD::BUILD_VECTOR: {
5161 // The BUILD_VECTOR node must be a splat.
5162 if (!isSplatVector(Op.getNode()))
5165 Ld = Op.getOperand(0);
5166 ConstSplatVal = (Ld.getOpcode() == ISD::Constant ||
5167 Ld.getOpcode() == ISD::ConstantFP);
5169 // The suspected load node has several users. Make sure that all
5170 // of its users are from the BUILD_VECTOR node.
5171 // Constants may have multiple users.
5172 if (!ConstSplatVal && !Ld->hasNUsesOfValue(VT.getVectorNumElements(), 0))
5177 case ISD::VECTOR_SHUFFLE: {
5178 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
5180 // Shuffles must have a splat mask where the first element is
5182 if ((!SVOp->isSplat()) || SVOp->getMaskElt(0) != 0)
5185 SDValue Sc = Op.getOperand(0);
5186 if (Sc.getOpcode() != ISD::SCALAR_TO_VECTOR &&
5187 Sc.getOpcode() != ISD::BUILD_VECTOR) {
5189 if (!Subtarget->hasInt256())
5192 // Use the register form of the broadcast instruction available on AVX2.
5193 if (VT.is256BitVector())
5194 Sc = Extract128BitVector(Sc, 0, DAG, dl);
5195 return DAG.getNode(X86ISD::VBROADCAST, dl, VT, Sc);
5198 Ld = Sc.getOperand(0);
5199 ConstSplatVal = (Ld.getOpcode() == ISD::Constant ||
5200 Ld.getOpcode() == ISD::ConstantFP);
5202 // The scalar_to_vector node and the suspected
5203 // load node must have exactly one user.
5204 // Constants may have multiple users.
5205 if (!ConstSplatVal && (!Sc.hasOneUse() || !Ld.hasOneUse()))
5211 bool Is256 = VT.is256BitVector();
5213 // Handle the broadcasting a single constant scalar from the constant pool
5214 // into a vector. On Sandybridge it is still better to load a constant vector
5215 // from the constant pool and not to broadcast it from a scalar.
5216 if (ConstSplatVal && Subtarget->hasInt256()) {
5217 EVT CVT = Ld.getValueType();
5218 assert(!CVT.isVector() && "Must not broadcast a vector type");
5219 unsigned ScalarSize = CVT.getSizeInBits();
5221 if (ScalarSize == 32 || (Is256 && ScalarSize == 64)) {
5222 const Constant *C = 0;
5223 if (ConstantSDNode *CI = dyn_cast<ConstantSDNode>(Ld))
5224 C = CI->getConstantIntValue();
5225 else if (ConstantFPSDNode *CF = dyn_cast<ConstantFPSDNode>(Ld))
5226 C = CF->getConstantFPValue();
5228 assert(C && "Invalid constant type");
5230 SDValue CP = DAG.getConstantPool(C, getPointerTy());
5231 unsigned Alignment = cast<ConstantPoolSDNode>(CP)->getAlignment();
5232 Ld = DAG.getLoad(CVT, dl, DAG.getEntryNode(), CP,
5233 MachinePointerInfo::getConstantPool(),
5234 false, false, false, Alignment);
5236 return DAG.getNode(X86ISD::VBROADCAST, dl, VT, Ld);
5240 bool IsLoad = ISD::isNormalLoad(Ld.getNode());
5241 unsigned ScalarSize = Ld.getValueType().getSizeInBits();
5243 // Handle AVX2 in-register broadcasts.
5244 if (!IsLoad && Subtarget->hasInt256() &&
5245 (ScalarSize == 32 || (Is256 && ScalarSize == 64)))
5246 return DAG.getNode(X86ISD::VBROADCAST, dl, VT, Ld);
5248 // The scalar source must be a normal load.
5252 if (ScalarSize == 32 || (Is256 && ScalarSize == 64))
5253 return DAG.getNode(X86ISD::VBROADCAST, dl, VT, Ld);
5255 // The integer check is needed for the 64-bit into 128-bit so it doesn't match
5256 // double since there is no vbroadcastsd xmm
5257 if (Subtarget->hasInt256() && Ld.getValueType().isInteger()) {
5258 if (ScalarSize == 8 || ScalarSize == 16 || ScalarSize == 64)
5259 return DAG.getNode(X86ISD::VBROADCAST, dl, VT, Ld);
5262 // Unsupported broadcast.
5267 X86TargetLowering::buildFromShuffleMostly(SDValue Op, SelectionDAG &DAG) const {
5268 EVT VT = Op.getValueType();
5270 // Skip if insert_vec_elt is not supported.
5271 if (!isOperationLegalOrCustom(ISD::INSERT_VECTOR_ELT, VT))
5274 DebugLoc DL = Op.getDebugLoc();
5275 unsigned NumElems = Op.getNumOperands();
5279 SmallVector<unsigned, 4> InsertIndices;
5280 SmallVector<int, 8> Mask(NumElems, -1);
5282 for (unsigned i = 0; i != NumElems; ++i) {
5283 unsigned Opc = Op.getOperand(i).getOpcode();
5285 if (Opc == ISD::UNDEF)
5288 if (Opc != ISD::EXTRACT_VECTOR_ELT) {
5289 // Quit if more than 1 elements need inserting.
5290 if (InsertIndices.size() > 1)
5293 InsertIndices.push_back(i);
5297 SDValue ExtractedFromVec = Op.getOperand(i).getOperand(0);
5298 SDValue ExtIdx = Op.getOperand(i).getOperand(1);
5300 // Quit if extracted from vector of different type.
5301 if (ExtractedFromVec.getValueType() != VT)
5304 // Quit if non-constant index.
5305 if (!isa<ConstantSDNode>(ExtIdx))
5308 if (VecIn1.getNode() == 0)
5309 VecIn1 = ExtractedFromVec;
5310 else if (VecIn1 != ExtractedFromVec) {
5311 if (VecIn2.getNode() == 0)
5312 VecIn2 = ExtractedFromVec;
5313 else if (VecIn2 != ExtractedFromVec)
5314 // Quit if more than 2 vectors to shuffle
5318 unsigned Idx = cast<ConstantSDNode>(ExtIdx)->getZExtValue();
5320 if (ExtractedFromVec == VecIn1)
5322 else if (ExtractedFromVec == VecIn2)
5323 Mask[i] = Idx + NumElems;
5326 if (VecIn1.getNode() == 0)
5329 VecIn2 = VecIn2.getNode() ? VecIn2 : DAG.getUNDEF(VT);
5330 SDValue NV = DAG.getVectorShuffle(VT, DL, VecIn1, VecIn2, &Mask[0]);
5331 for (unsigned i = 0, e = InsertIndices.size(); i != e; ++i) {
5332 unsigned Idx = InsertIndices[i];
5333 NV = DAG.getNode(ISD::INSERT_VECTOR_ELT, DL, VT, NV, Op.getOperand(Idx),
5334 DAG.getIntPtrConstant(Idx));
5341 X86TargetLowering::LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG) const {
5342 DebugLoc dl = Op.getDebugLoc();
5344 MVT VT = Op.getValueType().getSimpleVT();
5345 MVT ExtVT = VT.getVectorElementType();
5346 unsigned NumElems = Op.getNumOperands();
5348 // Vectors containing all zeros can be matched by pxor and xorps later
5349 if (ISD::isBuildVectorAllZeros(Op.getNode())) {
5350 // Canonicalize this to <4 x i32> to 1) ensure the zero vectors are CSE'd
5351 // and 2) ensure that i64 scalars are eliminated on x86-32 hosts.
5352 if (VT == MVT::v4i32 || VT == MVT::v8i32)
5355 return getZeroVector(VT, Subtarget, DAG, dl);
5358 // Vectors containing all ones can be matched by pcmpeqd on 128-bit width
5359 // vectors or broken into v4i32 operations on 256-bit vectors. AVX2 can use
5360 // vpcmpeqd on 256-bit vectors.
5361 if (Subtarget->hasSSE2() && ISD::isBuildVectorAllOnes(Op.getNode())) {
5362 if (VT == MVT::v4i32 || (VT == MVT::v8i32 && Subtarget->hasInt256()))
5365 return getOnesVector(VT, Subtarget->hasInt256(), DAG, dl);
5368 SDValue Broadcast = LowerVectorBroadcast(Op, DAG);
5369 if (Broadcast.getNode())
5372 unsigned EVTBits = ExtVT.getSizeInBits();
5374 unsigned NumZero = 0;
5375 unsigned NumNonZero = 0;
5376 unsigned NonZeros = 0;
5377 bool IsAllConstants = true;
5378 SmallSet<SDValue, 8> Values;
5379 for (unsigned i = 0; i < NumElems; ++i) {
5380 SDValue Elt = Op.getOperand(i);
5381 if (Elt.getOpcode() == ISD::UNDEF)
5384 if (Elt.getOpcode() != ISD::Constant &&
5385 Elt.getOpcode() != ISD::ConstantFP)
5386 IsAllConstants = false;
5387 if (X86::isZeroNode(Elt))
5390 NonZeros |= (1 << i);
5395 // All undef vector. Return an UNDEF. All zero vectors were handled above.
5396 if (NumNonZero == 0)
5397 return DAG.getUNDEF(VT);
5399 // Special case for single non-zero, non-undef, element.
5400 if (NumNonZero == 1) {
5401 unsigned Idx = CountTrailingZeros_32(NonZeros);
5402 SDValue Item = Op.getOperand(Idx);
5404 // If this is an insertion of an i64 value on x86-32, and if the top bits of
5405 // the value are obviously zero, truncate the value to i32 and do the
5406 // insertion that way. Only do this if the value is non-constant or if the
5407 // value is a constant being inserted into element 0. It is cheaper to do
5408 // a constant pool load than it is to do a movd + shuffle.
5409 if (ExtVT == MVT::i64 && !Subtarget->is64Bit() &&
5410 (!IsAllConstants || Idx == 0)) {
5411 if (DAG.MaskedValueIsZero(Item, APInt::getBitsSet(64, 32, 64))) {
5413 assert(VT == MVT::v2i64 && "Expected an SSE value type!");
5414 EVT VecVT = MVT::v4i32;
5415 unsigned VecElts = 4;
5417 // Truncate the value (which may itself be a constant) to i32, and
5418 // convert it to a vector with movd (S2V+shuffle to zero extend).
5419 Item = DAG.getNode(ISD::TRUNCATE, dl, MVT::i32, Item);
5420 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VecVT, Item);
5421 Item = getShuffleVectorZeroOrUndef(Item, 0, true, Subtarget, DAG);
5423 // Now we have our 32-bit value zero extended in the low element of
5424 // a vector. If Idx != 0, swizzle it into place.
5426 SmallVector<int, 4> Mask;
5427 Mask.push_back(Idx);
5428 for (unsigned i = 1; i != VecElts; ++i)
5430 Item = DAG.getVectorShuffle(VecVT, dl, Item, DAG.getUNDEF(VecVT),
5433 return DAG.getNode(ISD::BITCAST, dl, VT, Item);
5437 // If we have a constant or non-constant insertion into the low element of
5438 // a vector, we can do this with SCALAR_TO_VECTOR + shuffle of zero into
5439 // the rest of the elements. This will be matched as movd/movq/movss/movsd
5440 // depending on what the source datatype is.
5443 return DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Item);
5445 if (ExtVT == MVT::i32 || ExtVT == MVT::f32 || ExtVT == MVT::f64 ||
5446 (ExtVT == MVT::i64 && Subtarget->is64Bit())) {
5447 if (VT.is256BitVector()) {
5448 SDValue ZeroVec = getZeroVector(VT, Subtarget, DAG, dl);
5449 return DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, ZeroVec,
5450 Item, DAG.getIntPtrConstant(0));
5452 assert(VT.is128BitVector() && "Expected an SSE value type!");
5453 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Item);
5454 // Turn it into a MOVL (i.e. movss, movsd, or movd) to a zero vector.
5455 return getShuffleVectorZeroOrUndef(Item, 0, true, Subtarget, DAG);
5458 if (ExtVT == MVT::i16 || ExtVT == MVT::i8) {
5459 Item = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, Item);
5460 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32, Item);
5461 if (VT.is256BitVector()) {
5462 SDValue ZeroVec = getZeroVector(MVT::v8i32, Subtarget, DAG, dl);
5463 Item = Insert128BitVector(ZeroVec, Item, 0, DAG, dl);
5465 assert(VT.is128BitVector() && "Expected an SSE value type!");
5466 Item = getShuffleVectorZeroOrUndef(Item, 0, true, Subtarget, DAG);
5468 return DAG.getNode(ISD::BITCAST, dl, VT, Item);
5472 // Is it a vector logical left shift?
5473 if (NumElems == 2 && Idx == 1 &&
5474 X86::isZeroNode(Op.getOperand(0)) &&
5475 !X86::isZeroNode(Op.getOperand(1))) {
5476 unsigned NumBits = VT.getSizeInBits();
5477 return getVShift(true, VT,
5478 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
5479 VT, Op.getOperand(1)),
5480 NumBits/2, DAG, *this, dl);
5483 if (IsAllConstants) // Otherwise, it's better to do a constpool load.
5486 // Otherwise, if this is a vector with i32 or f32 elements, and the element
5487 // is a non-constant being inserted into an element other than the low one,
5488 // we can't use a constant pool load. Instead, use SCALAR_TO_VECTOR (aka
5489 // movd/movss) to move this into the low element, then shuffle it into
5491 if (EVTBits == 32) {
5492 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Item);
5494 // Turn it into a shuffle of zero and zero-extended scalar to vector.
5495 Item = getShuffleVectorZeroOrUndef(Item, 0, NumZero > 0, Subtarget, DAG);
5496 SmallVector<int, 8> MaskVec;
5497 for (unsigned i = 0; i != NumElems; ++i)
5498 MaskVec.push_back(i == Idx ? 0 : 1);
5499 return DAG.getVectorShuffle(VT, dl, Item, DAG.getUNDEF(VT), &MaskVec[0]);
5503 // Splat is obviously ok. Let legalizer expand it to a shuffle.
5504 if (Values.size() == 1) {
5505 if (EVTBits == 32) {
5506 // Instead of a shuffle like this:
5507 // shuffle (scalar_to_vector (load (ptr + 4))), undef, <0, 0, 0, 0>
5508 // Check if it's possible to issue this instead.
5509 // shuffle (vload ptr)), undef, <1, 1, 1, 1>
5510 unsigned Idx = CountTrailingZeros_32(NonZeros);
5511 SDValue Item = Op.getOperand(Idx);
5512 if (Op.getNode()->isOnlyUserOf(Item.getNode()))
5513 return LowerAsSplatVectorLoad(Item, VT, dl, DAG);
5518 // A vector full of immediates; various special cases are already
5519 // handled, so this is best done with a single constant-pool load.
5523 // For AVX-length vectors, build the individual 128-bit pieces and use
5524 // shuffles to put them in place.
5525 if (VT.is256BitVector()) {
5526 SmallVector<SDValue, 32> V;
5527 for (unsigned i = 0; i != NumElems; ++i)
5528 V.push_back(Op.getOperand(i));
5530 EVT HVT = EVT::getVectorVT(*DAG.getContext(), ExtVT, NumElems/2);
5532 // Build both the lower and upper subvector.
5533 SDValue Lower = DAG.getNode(ISD::BUILD_VECTOR, dl, HVT, &V[0], NumElems/2);
5534 SDValue Upper = DAG.getNode(ISD::BUILD_VECTOR, dl, HVT, &V[NumElems / 2],
5537 // Recreate the wider vector with the lower and upper part.
5538 return Concat128BitVectors(Lower, Upper, VT, NumElems, DAG, dl);
5541 // Let legalizer expand 2-wide build_vectors.
5542 if (EVTBits == 64) {
5543 if (NumNonZero == 1) {
5544 // One half is zero or undef.
5545 unsigned Idx = CountTrailingZeros_32(NonZeros);
5546 SDValue V2 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT,
5547 Op.getOperand(Idx));
5548 return getShuffleVectorZeroOrUndef(V2, Idx, true, Subtarget, DAG);
5553 // If element VT is < 32 bits, convert it to inserts into a zero vector.
5554 if (EVTBits == 8 && NumElems == 16) {
5555 SDValue V = LowerBuildVectorv16i8(Op, NonZeros,NumNonZero,NumZero, DAG,
5557 if (V.getNode()) return V;
5560 if (EVTBits == 16 && NumElems == 8) {
5561 SDValue V = LowerBuildVectorv8i16(Op, NonZeros,NumNonZero,NumZero, DAG,
5563 if (V.getNode()) return V;
5566 // If element VT is == 32 bits, turn it into a number of shuffles.
5567 SmallVector<SDValue, 8> V(NumElems);
5568 if (NumElems == 4 && NumZero > 0) {
5569 for (unsigned i = 0; i < 4; ++i) {
5570 bool isZero = !(NonZeros & (1 << i));
5572 V[i] = getZeroVector(VT, Subtarget, DAG, dl);
5574 V[i] = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Op.getOperand(i));
5577 for (unsigned i = 0; i < 2; ++i) {
5578 switch ((NonZeros & (0x3 << i*2)) >> (i*2)) {
5581 V[i] = V[i*2]; // Must be a zero vector.
5584 V[i] = getMOVL(DAG, dl, VT, V[i*2+1], V[i*2]);
5587 V[i] = getMOVL(DAG, dl, VT, V[i*2], V[i*2+1]);
5590 V[i] = getUnpackl(DAG, dl, VT, V[i*2], V[i*2+1]);
5595 bool Reverse1 = (NonZeros & 0x3) == 2;
5596 bool Reverse2 = ((NonZeros & (0x3 << 2)) >> 2) == 2;
5600 static_cast<int>(Reverse2 ? NumElems+1 : NumElems),
5601 static_cast<int>(Reverse2 ? NumElems : NumElems+1)
5603 return DAG.getVectorShuffle(VT, dl, V[0], V[1], &MaskVec[0]);
5606 if (Values.size() > 1 && VT.is128BitVector()) {
5607 // Check for a build vector of consecutive loads.
5608 for (unsigned i = 0; i < NumElems; ++i)
5609 V[i] = Op.getOperand(i);
5611 // Check for elements which are consecutive loads.
5612 SDValue LD = EltsFromConsecutiveLoads(VT, V, dl, DAG);
5616 // Check for a build vector from mostly shuffle plus few inserting.
5617 SDValue Sh = buildFromShuffleMostly(Op, DAG);
5621 // For SSE 4.1, use insertps to put the high elements into the low element.
5622 if (getSubtarget()->hasSSE41()) {
5624 if (Op.getOperand(0).getOpcode() != ISD::UNDEF)
5625 Result = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Op.getOperand(0));
5627 Result = DAG.getUNDEF(VT);
5629 for (unsigned i = 1; i < NumElems; ++i) {
5630 if (Op.getOperand(i).getOpcode() == ISD::UNDEF) continue;
5631 Result = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, Result,
5632 Op.getOperand(i), DAG.getIntPtrConstant(i));
5637 // Otherwise, expand into a number of unpckl*, start by extending each of
5638 // our (non-undef) elements to the full vector width with the element in the
5639 // bottom slot of the vector (which generates no code for SSE).
5640 for (unsigned i = 0; i < NumElems; ++i) {
5641 if (Op.getOperand(i).getOpcode() != ISD::UNDEF)
5642 V[i] = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Op.getOperand(i));
5644 V[i] = DAG.getUNDEF(VT);
5647 // Next, we iteratively mix elements, e.g. for v4f32:
5648 // Step 1: unpcklps 0, 2 ==> X: <?, ?, 2, 0>
5649 // : unpcklps 1, 3 ==> Y: <?, ?, 3, 1>
5650 // Step 2: unpcklps X, Y ==> <3, 2, 1, 0>
5651 unsigned EltStride = NumElems >> 1;
5652 while (EltStride != 0) {
5653 for (unsigned i = 0; i < EltStride; ++i) {
5654 // If V[i+EltStride] is undef and this is the first round of mixing,
5655 // then it is safe to just drop this shuffle: V[i] is already in the
5656 // right place, the one element (since it's the first round) being
5657 // inserted as undef can be dropped. This isn't safe for successive
5658 // rounds because they will permute elements within both vectors.
5659 if (V[i+EltStride].getOpcode() == ISD::UNDEF &&
5660 EltStride == NumElems/2)
5663 V[i] = getUnpackl(DAG, dl, VT, V[i], V[i + EltStride]);
5672 // LowerAVXCONCAT_VECTORS - 256-bit AVX can use the vinsertf128 instruction
5673 // to create 256-bit vectors from two other 128-bit ones.
5674 static SDValue LowerAVXCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) {
5675 DebugLoc dl = Op.getDebugLoc();
5676 MVT ResVT = Op.getValueType().getSimpleVT();
5678 assert(ResVT.is256BitVector() && "Value type must be 256-bit wide");
5680 SDValue V1 = Op.getOperand(0);
5681 SDValue V2 = Op.getOperand(1);
5682 unsigned NumElems = ResVT.getVectorNumElements();
5684 return Concat128BitVectors(V1, V2, ResVT, NumElems, DAG, dl);
5687 static SDValue LowerCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) {
5688 assert(Op.getNumOperands() == 2);
5690 // 256-bit AVX can use the vinsertf128 instruction to create 256-bit vectors
5691 // from two other 128-bit ones.
5692 return LowerAVXCONCAT_VECTORS(Op, DAG);
5695 // Try to lower a shuffle node into a simple blend instruction.
5697 LowerVECTOR_SHUFFLEtoBlend(ShuffleVectorSDNode *SVOp,
5698 const X86Subtarget *Subtarget, SelectionDAG &DAG) {
5699 SDValue V1 = SVOp->getOperand(0);
5700 SDValue V2 = SVOp->getOperand(1);
5701 DebugLoc dl = SVOp->getDebugLoc();
5702 MVT VT = SVOp->getValueType(0).getSimpleVT();
5703 MVT EltVT = VT.getVectorElementType();
5704 unsigned NumElems = VT.getVectorNumElements();
5706 if (!Subtarget->hasSSE41() || EltVT == MVT::i8)
5708 if (!Subtarget->hasInt256() && VT == MVT::v16i16)
5711 // Check the mask for BLEND and build the value.
5712 unsigned MaskValue = 0;
5713 // There are 2 lanes if (NumElems > 8), and 1 lane otherwise.
5714 unsigned NumLanes = (NumElems-1)/8 + 1;
5715 unsigned NumElemsInLane = NumElems / NumLanes;
5717 // Blend for v16i16 should be symetric for the both lanes.
5718 for (unsigned i = 0; i < NumElemsInLane; ++i) {
5720 int SndLaneEltIdx = (NumLanes == 2) ?
5721 SVOp->getMaskElt(i + NumElemsInLane) : -1;
5722 int EltIdx = SVOp->getMaskElt(i);
5724 if ((EltIdx < 0 || EltIdx == (int)i) &&
5725 (SndLaneEltIdx < 0 || SndLaneEltIdx == (int)(i + NumElemsInLane)))
5728 if (((unsigned)EltIdx == (i + NumElems)) &&
5729 (SndLaneEltIdx < 0 ||
5730 (unsigned)SndLaneEltIdx == i + NumElems + NumElemsInLane))
5731 MaskValue |= (1<<i);
5736 // Convert i32 vectors to floating point if it is not AVX2.
5737 // AVX2 introduced VPBLENDD instruction for 128 and 256-bit vectors.
5739 if (EltVT == MVT::i64 || (EltVT == MVT::i32 && !Subtarget->hasInt256())) {
5740 BlendVT = MVT::getVectorVT(MVT::getFloatingPointVT(EltVT.getSizeInBits()),
5742 V1 = DAG.getNode(ISD::BITCAST, dl, VT, V1);
5743 V2 = DAG.getNode(ISD::BITCAST, dl, VT, V2);
5746 SDValue Ret = DAG.getNode(X86ISD::BLENDI, dl, BlendVT, V1, V2,
5747 DAG.getConstant(MaskValue, MVT::i32));
5748 return DAG.getNode(ISD::BITCAST, dl, VT, Ret);
5751 // v8i16 shuffles - Prefer shuffles in the following order:
5752 // 1. [all] pshuflw, pshufhw, optional move
5753 // 2. [ssse3] 1 x pshufb
5754 // 3. [ssse3] 2 x pshufb + 1 x por
5755 // 4. [all] mov + pshuflw + pshufhw + N x (pextrw + pinsrw)
5757 LowerVECTOR_SHUFFLEv8i16(SDValue Op, const X86Subtarget *Subtarget,
5758 SelectionDAG &DAG) {
5759 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
5760 SDValue V1 = SVOp->getOperand(0);
5761 SDValue V2 = SVOp->getOperand(1);
5762 DebugLoc dl = SVOp->getDebugLoc();
5763 SmallVector<int, 8> MaskVals;
5765 // Determine if more than 1 of the words in each of the low and high quadwords
5766 // of the result come from the same quadword of one of the two inputs. Undef
5767 // mask values count as coming from any quadword, for better codegen.
5768 unsigned LoQuad[] = { 0, 0, 0, 0 };
5769 unsigned HiQuad[] = { 0, 0, 0, 0 };
5770 std::bitset<4> InputQuads;
5771 for (unsigned i = 0; i < 8; ++i) {
5772 unsigned *Quad = i < 4 ? LoQuad : HiQuad;
5773 int EltIdx = SVOp->getMaskElt(i);
5774 MaskVals.push_back(EltIdx);
5783 InputQuads.set(EltIdx / 4);
5786 int BestLoQuad = -1;
5787 unsigned MaxQuad = 1;
5788 for (unsigned i = 0; i < 4; ++i) {
5789 if (LoQuad[i] > MaxQuad) {
5791 MaxQuad = LoQuad[i];
5795 int BestHiQuad = -1;
5797 for (unsigned i = 0; i < 4; ++i) {
5798 if (HiQuad[i] > MaxQuad) {
5800 MaxQuad = HiQuad[i];
5804 // For SSSE3, If all 8 words of the result come from only 1 quadword of each
5805 // of the two input vectors, shuffle them into one input vector so only a
5806 // single pshufb instruction is necessary. If There are more than 2 input
5807 // quads, disable the next transformation since it does not help SSSE3.
5808 bool V1Used = InputQuads[0] || InputQuads[1];
5809 bool V2Used = InputQuads[2] || InputQuads[3];
5810 if (Subtarget->hasSSSE3()) {
5811 if (InputQuads.count() == 2 && V1Used && V2Used) {
5812 BestLoQuad = InputQuads[0] ? 0 : 1;
5813 BestHiQuad = InputQuads[2] ? 2 : 3;
5815 if (InputQuads.count() > 2) {
5821 // If BestLoQuad or BestHiQuad are set, shuffle the quads together and update
5822 // the shuffle mask. If a quad is scored as -1, that means that it contains
5823 // words from all 4 input quadwords.
5825 if (BestLoQuad >= 0 || BestHiQuad >= 0) {
5827 BestLoQuad < 0 ? 0 : BestLoQuad,
5828 BestHiQuad < 0 ? 1 : BestHiQuad
5830 NewV = DAG.getVectorShuffle(MVT::v2i64, dl,
5831 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64, V1),
5832 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64, V2), &MaskV[0]);
5833 NewV = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, NewV);
5835 // Rewrite the MaskVals and assign NewV to V1 if NewV now contains all the
5836 // source words for the shuffle, to aid later transformations.
5837 bool AllWordsInNewV = true;
5838 bool InOrder[2] = { true, true };
5839 for (unsigned i = 0; i != 8; ++i) {
5840 int idx = MaskVals[i];
5842 InOrder[i/4] = false;
5843 if (idx < 0 || (idx/4) == BestLoQuad || (idx/4) == BestHiQuad)
5845 AllWordsInNewV = false;
5849 bool pshuflw = AllWordsInNewV, pshufhw = AllWordsInNewV;
5850 if (AllWordsInNewV) {
5851 for (int i = 0; i != 8; ++i) {
5852 int idx = MaskVals[i];
5855 idx = MaskVals[i] = (idx / 4) == BestLoQuad ? (idx & 3) : (idx & 3) + 4;
5856 if ((idx != i) && idx < 4)
5858 if ((idx != i) && idx > 3)
5867 // If we've eliminated the use of V2, and the new mask is a pshuflw or
5868 // pshufhw, that's as cheap as it gets. Return the new shuffle.
5869 if ((pshufhw && InOrder[0]) || (pshuflw && InOrder[1])) {
5870 unsigned Opc = pshufhw ? X86ISD::PSHUFHW : X86ISD::PSHUFLW;
5871 unsigned TargetMask = 0;
5872 NewV = DAG.getVectorShuffle(MVT::v8i16, dl, NewV,
5873 DAG.getUNDEF(MVT::v8i16), &MaskVals[0]);
5874 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(NewV.getNode());
5875 TargetMask = pshufhw ? getShufflePSHUFHWImmediate(SVOp):
5876 getShufflePSHUFLWImmediate(SVOp);
5877 V1 = NewV.getOperand(0);
5878 return getTargetShuffleNode(Opc, dl, MVT::v8i16, V1, TargetMask, DAG);
5882 // Promote splats to a larger type which usually leads to more efficient code.
5883 // FIXME: Is this true if pshufb is available?
5884 if (SVOp->isSplat())
5885 return PromoteSplat(SVOp, DAG);
5887 // If we have SSSE3, and all words of the result are from 1 input vector,
5888 // case 2 is generated, otherwise case 3 is generated. If no SSSE3
5889 // is present, fall back to case 4.
5890 if (Subtarget->hasSSSE3()) {
5891 SmallVector<SDValue,16> pshufbMask;
5893 // If we have elements from both input vectors, set the high bit of the
5894 // shuffle mask element to zero out elements that come from V2 in the V1
5895 // mask, and elements that come from V1 in the V2 mask, so that the two
5896 // results can be OR'd together.
5897 bool TwoInputs = V1Used && V2Used;
5898 for (unsigned i = 0; i != 8; ++i) {
5899 int EltIdx = MaskVals[i] * 2;
5900 int Idx0 = (TwoInputs && (EltIdx >= 16)) ? 0x80 : EltIdx;
5901 int Idx1 = (TwoInputs && (EltIdx >= 16)) ? 0x80 : EltIdx+1;
5902 pshufbMask.push_back(DAG.getConstant(Idx0, MVT::i8));
5903 pshufbMask.push_back(DAG.getConstant(Idx1, MVT::i8));
5905 V1 = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, V1);
5906 V1 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V1,
5907 DAG.getNode(ISD::BUILD_VECTOR, dl,
5908 MVT::v16i8, &pshufbMask[0], 16));
5910 return DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, V1);
5912 // Calculate the shuffle mask for the second input, shuffle it, and
5913 // OR it with the first shuffled input.
5915 for (unsigned i = 0; i != 8; ++i) {
5916 int EltIdx = MaskVals[i] * 2;
5917 int Idx0 = (EltIdx < 16) ? 0x80 : EltIdx - 16;
5918 int Idx1 = (EltIdx < 16) ? 0x80 : EltIdx - 15;
5919 pshufbMask.push_back(DAG.getConstant(Idx0, MVT::i8));
5920 pshufbMask.push_back(DAG.getConstant(Idx1, MVT::i8));
5922 V2 = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, V2);
5923 V2 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V2,
5924 DAG.getNode(ISD::BUILD_VECTOR, dl,
5925 MVT::v16i8, &pshufbMask[0], 16));
5926 V1 = DAG.getNode(ISD::OR, dl, MVT::v16i8, V1, V2);
5927 return DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, V1);
5930 // If BestLoQuad >= 0, generate a pshuflw to put the low elements in order,
5931 // and update MaskVals with new element order.
5932 std::bitset<8> InOrder;
5933 if (BestLoQuad >= 0) {
5934 int MaskV[] = { -1, -1, -1, -1, 4, 5, 6, 7 };
5935 for (int i = 0; i != 4; ++i) {
5936 int idx = MaskVals[i];
5939 } else if ((idx / 4) == BestLoQuad) {
5944 NewV = DAG.getVectorShuffle(MVT::v8i16, dl, NewV, DAG.getUNDEF(MVT::v8i16),
5947 if (NewV.getOpcode() == ISD::VECTOR_SHUFFLE && Subtarget->hasSSSE3()) {
5948 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(NewV.getNode());
5949 NewV = getTargetShuffleNode(X86ISD::PSHUFLW, dl, MVT::v8i16,
5951 getShufflePSHUFLWImmediate(SVOp), DAG);
5955 // If BestHi >= 0, generate a pshufhw to put the high elements in order,
5956 // and update MaskVals with the new element order.
5957 if (BestHiQuad >= 0) {
5958 int MaskV[] = { 0, 1, 2, 3, -1, -1, -1, -1 };
5959 for (unsigned i = 4; i != 8; ++i) {
5960 int idx = MaskVals[i];
5963 } else if ((idx / 4) == BestHiQuad) {
5964 MaskV[i] = (idx & 3) + 4;
5968 NewV = DAG.getVectorShuffle(MVT::v8i16, dl, NewV, DAG.getUNDEF(MVT::v8i16),
5971 if (NewV.getOpcode() == ISD::VECTOR_SHUFFLE && Subtarget->hasSSSE3()) {
5972 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(NewV.getNode());
5973 NewV = getTargetShuffleNode(X86ISD::PSHUFHW, dl, MVT::v8i16,
5975 getShufflePSHUFHWImmediate(SVOp), DAG);
5979 // In case BestHi & BestLo were both -1, which means each quadword has a word
5980 // from each of the four input quadwords, calculate the InOrder bitvector now
5981 // before falling through to the insert/extract cleanup.
5982 if (BestLoQuad == -1 && BestHiQuad == -1) {
5984 for (int i = 0; i != 8; ++i)
5985 if (MaskVals[i] < 0 || MaskVals[i] == i)
5989 // The other elements are put in the right place using pextrw and pinsrw.
5990 for (unsigned i = 0; i != 8; ++i) {
5993 int EltIdx = MaskVals[i];
5996 SDValue ExtOp = (EltIdx < 8) ?
5997 DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, V1,
5998 DAG.getIntPtrConstant(EltIdx)) :
5999 DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, V2,
6000 DAG.getIntPtrConstant(EltIdx - 8));
6001 NewV = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, NewV, ExtOp,
6002 DAG.getIntPtrConstant(i));
6007 // v16i8 shuffles - Prefer shuffles in the following order:
6008 // 1. [ssse3] 1 x pshufb
6009 // 2. [ssse3] 2 x pshufb + 1 x por
6010 // 3. [all] v8i16 shuffle + N x pextrw + rotate + pinsrw
6012 SDValue LowerVECTOR_SHUFFLEv16i8(ShuffleVectorSDNode *SVOp,
6014 const X86TargetLowering &TLI) {
6015 SDValue V1 = SVOp->getOperand(0);
6016 SDValue V2 = SVOp->getOperand(1);
6017 DebugLoc dl = SVOp->getDebugLoc();
6018 ArrayRef<int> MaskVals = SVOp->getMask();
6020 // Promote splats to a larger type which usually leads to more efficient code.
6021 // FIXME: Is this true if pshufb is available?
6022 if (SVOp->isSplat())
6023 return PromoteSplat(SVOp, DAG);
6025 // If we have SSSE3, case 1 is generated when all result bytes come from
6026 // one of the inputs. Otherwise, case 2 is generated. If no SSSE3 is
6027 // present, fall back to case 3.
6029 // If SSSE3, use 1 pshufb instruction per vector with elements in the result.
6030 if (TLI.getSubtarget()->hasSSSE3()) {
6031 SmallVector<SDValue,16> pshufbMask;
6033 // If all result elements are from one input vector, then only translate
6034 // undef mask values to 0x80 (zero out result) in the pshufb mask.
6036 // Otherwise, we have elements from both input vectors, and must zero out
6037 // elements that come from V2 in the first mask, and V1 in the second mask
6038 // so that we can OR them together.
6039 for (unsigned i = 0; i != 16; ++i) {
6040 int EltIdx = MaskVals[i];
6041 if (EltIdx < 0 || EltIdx >= 16)
6043 pshufbMask.push_back(DAG.getConstant(EltIdx, MVT::i8));
6045 V1 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V1,
6046 DAG.getNode(ISD::BUILD_VECTOR, dl,
6047 MVT::v16i8, &pshufbMask[0], 16));
6049 // As PSHUFB will zero elements with negative indices, it's safe to ignore
6050 // the 2nd operand if it's undefined or zero.
6051 if (V2.getOpcode() == ISD::UNDEF ||
6052 ISD::isBuildVectorAllZeros(V2.getNode()))
6055 // Calculate the shuffle mask for the second input, shuffle it, and
6056 // OR it with the first shuffled input.
6058 for (unsigned i = 0; i != 16; ++i) {
6059 int EltIdx = MaskVals[i];
6060 EltIdx = (EltIdx < 16) ? 0x80 : EltIdx - 16;
6061 pshufbMask.push_back(DAG.getConstant(EltIdx, MVT::i8));
6063 V2 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V2,
6064 DAG.getNode(ISD::BUILD_VECTOR, dl,
6065 MVT::v16i8, &pshufbMask[0], 16));
6066 return DAG.getNode(ISD::OR, dl, MVT::v16i8, V1, V2);
6069 // No SSSE3 - Calculate in place words and then fix all out of place words
6070 // With 0-16 extracts & inserts. Worst case is 16 bytes out of order from
6071 // the 16 different words that comprise the two doublequadword input vectors.
6072 V1 = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, V1);
6073 V2 = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, V2);
6075 for (int i = 0; i != 8; ++i) {
6076 int Elt0 = MaskVals[i*2];
6077 int Elt1 = MaskVals[i*2+1];
6079 // This word of the result is all undef, skip it.
6080 if (Elt0 < 0 && Elt1 < 0)
6083 // This word of the result is already in the correct place, skip it.
6084 if ((Elt0 == i*2) && (Elt1 == i*2+1))
6087 SDValue Elt0Src = Elt0 < 16 ? V1 : V2;
6088 SDValue Elt1Src = Elt1 < 16 ? V1 : V2;
6091 // If Elt0 and Elt1 are defined, are consecutive, and can be load
6092 // using a single extract together, load it and store it.
6093 if ((Elt0 >= 0) && ((Elt0 + 1) == Elt1) && ((Elt0 & 1) == 0)) {
6094 InsElt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, Elt1Src,
6095 DAG.getIntPtrConstant(Elt1 / 2));
6096 NewV = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, NewV, InsElt,
6097 DAG.getIntPtrConstant(i));
6101 // If Elt1 is defined, extract it from the appropriate source. If the
6102 // source byte is not also odd, shift the extracted word left 8 bits
6103 // otherwise clear the bottom 8 bits if we need to do an or.
6105 InsElt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, Elt1Src,
6106 DAG.getIntPtrConstant(Elt1 / 2));
6107 if ((Elt1 & 1) == 0)
6108 InsElt = DAG.getNode(ISD::SHL, dl, MVT::i16, InsElt,
6110 TLI.getShiftAmountTy(InsElt.getValueType())));
6112 InsElt = DAG.getNode(ISD::AND, dl, MVT::i16, InsElt,
6113 DAG.getConstant(0xFF00, MVT::i16));
6115 // If Elt0 is defined, extract it from the appropriate source. If the
6116 // source byte is not also even, shift the extracted word right 8 bits. If
6117 // Elt1 was also defined, OR the extracted values together before
6118 // inserting them in the result.
6120 SDValue InsElt0 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16,
6121 Elt0Src, DAG.getIntPtrConstant(Elt0 / 2));
6122 if ((Elt0 & 1) != 0)
6123 InsElt0 = DAG.getNode(ISD::SRL, dl, MVT::i16, InsElt0,
6125 TLI.getShiftAmountTy(InsElt0.getValueType())));
6127 InsElt0 = DAG.getNode(ISD::AND, dl, MVT::i16, InsElt0,
6128 DAG.getConstant(0x00FF, MVT::i16));
6129 InsElt = Elt1 >= 0 ? DAG.getNode(ISD::OR, dl, MVT::i16, InsElt, InsElt0)
6132 NewV = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, NewV, InsElt,
6133 DAG.getIntPtrConstant(i));
6135 return DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, NewV);
6138 // v32i8 shuffles - Translate to VPSHUFB if possible.
6140 SDValue LowerVECTOR_SHUFFLEv32i8(ShuffleVectorSDNode *SVOp,
6141 const X86Subtarget *Subtarget,
6142 SelectionDAG &DAG) {
6143 MVT VT = SVOp->getValueType(0).getSimpleVT();
6144 SDValue V1 = SVOp->getOperand(0);
6145 SDValue V2 = SVOp->getOperand(1);
6146 DebugLoc dl = SVOp->getDebugLoc();
6147 SmallVector<int, 32> MaskVals(SVOp->getMask().begin(), SVOp->getMask().end());
6149 bool V2IsUndef = V2.getOpcode() == ISD::UNDEF;
6150 bool V1IsAllZero = ISD::isBuildVectorAllZeros(V1.getNode());
6151 bool V2IsAllZero = ISD::isBuildVectorAllZeros(V2.getNode());
6153 // VPSHUFB may be generated if
6154 // (1) one of input vector is undefined or zeroinitializer.
6155 // The mask value 0x80 puts 0 in the corresponding slot of the vector.
6156 // And (2) the mask indexes don't cross the 128-bit lane.
6157 if (VT != MVT::v32i8 || !Subtarget->hasInt256() ||
6158 (!V2IsUndef && !V2IsAllZero && !V1IsAllZero))
6161 if (V1IsAllZero && !V2IsAllZero) {
6162 CommuteVectorShuffleMask(MaskVals, 32);
6165 SmallVector<SDValue, 32> pshufbMask;
6166 for (unsigned i = 0; i != 32; i++) {
6167 int EltIdx = MaskVals[i];
6168 if (EltIdx < 0 || EltIdx >= 32)
6171 if ((EltIdx >= 16 && i < 16) || (EltIdx < 16 && i >= 16))
6172 // Cross lane is not allowed.
6176 pshufbMask.push_back(DAG.getConstant(EltIdx, MVT::i8));
6178 return DAG.getNode(X86ISD::PSHUFB, dl, MVT::v32i8, V1,
6179 DAG.getNode(ISD::BUILD_VECTOR, dl,
6180 MVT::v32i8, &pshufbMask[0], 32));
6183 /// RewriteAsNarrowerShuffle - Try rewriting v8i16 and v16i8 shuffles as 4 wide
6184 /// ones, or rewriting v4i32 / v4f32 as 2 wide ones if possible. This can be
6185 /// done when every pair / quad of shuffle mask elements point to elements in
6186 /// the right sequence. e.g.
6187 /// vector_shuffle X, Y, <2, 3, | 10, 11, | 0, 1, | 14, 15>
6189 SDValue RewriteAsNarrowerShuffle(ShuffleVectorSDNode *SVOp,
6190 SelectionDAG &DAG) {
6191 MVT VT = SVOp->getValueType(0).getSimpleVT();
6192 DebugLoc dl = SVOp->getDebugLoc();
6193 unsigned NumElems = VT.getVectorNumElements();
6196 switch (VT.SimpleTy) {
6197 default: llvm_unreachable("Unexpected!");
6198 case MVT::v4f32: NewVT = MVT::v2f64; Scale = 2; break;
6199 case MVT::v4i32: NewVT = MVT::v2i64; Scale = 2; break;
6200 case MVT::v8i16: NewVT = MVT::v4i32; Scale = 2; break;
6201 case MVT::v16i8: NewVT = MVT::v4i32; Scale = 4; break;
6202 case MVT::v16i16: NewVT = MVT::v8i32; Scale = 2; break;
6203 case MVT::v32i8: NewVT = MVT::v8i32; Scale = 4; break;
6206 SmallVector<int, 8> MaskVec;
6207 for (unsigned i = 0; i != NumElems; i += Scale) {
6209 for (unsigned j = 0; j != Scale; ++j) {
6210 int EltIdx = SVOp->getMaskElt(i+j);
6214 StartIdx = (EltIdx / Scale);
6215 if (EltIdx != (int)(StartIdx*Scale + j))
6218 MaskVec.push_back(StartIdx);
6221 SDValue V1 = DAG.getNode(ISD::BITCAST, dl, NewVT, SVOp->getOperand(0));
6222 SDValue V2 = DAG.getNode(ISD::BITCAST, dl, NewVT, SVOp->getOperand(1));
6223 return DAG.getVectorShuffle(NewVT, dl, V1, V2, &MaskVec[0]);
6226 /// getVZextMovL - Return a zero-extending vector move low node.
6228 static SDValue getVZextMovL(MVT VT, EVT OpVT,
6229 SDValue SrcOp, SelectionDAG &DAG,
6230 const X86Subtarget *Subtarget, DebugLoc dl) {
6231 if (VT == MVT::v2f64 || VT == MVT::v4f32) {
6232 LoadSDNode *LD = NULL;
6233 if (!isScalarLoadToVector(SrcOp.getNode(), &LD))
6234 LD = dyn_cast<LoadSDNode>(SrcOp);
6236 // movssrr and movsdrr do not clear top bits. Try to use movd, movq
6238 MVT ExtVT = (OpVT == MVT::v2f64) ? MVT::i64 : MVT::i32;
6239 if ((ExtVT != MVT::i64 || Subtarget->is64Bit()) &&
6240 SrcOp.getOpcode() == ISD::SCALAR_TO_VECTOR &&
6241 SrcOp.getOperand(0).getOpcode() == ISD::BITCAST &&
6242 SrcOp.getOperand(0).getOperand(0).getValueType() == ExtVT) {
6244 OpVT = (OpVT == MVT::v2f64) ? MVT::v2i64 : MVT::v4i32;
6245 return DAG.getNode(ISD::BITCAST, dl, VT,
6246 DAG.getNode(X86ISD::VZEXT_MOVL, dl, OpVT,
6247 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
6255 return DAG.getNode(ISD::BITCAST, dl, VT,
6256 DAG.getNode(X86ISD::VZEXT_MOVL, dl, OpVT,
6257 DAG.getNode(ISD::BITCAST, dl,
6261 /// LowerVECTOR_SHUFFLE_256 - Handle all 256-bit wide vectors shuffles
6262 /// which could not be matched by any known target speficic shuffle
6264 LowerVECTOR_SHUFFLE_256(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG) {
6266 SDValue NewOp = Compact8x32ShuffleNode(SVOp, DAG);
6267 if (NewOp.getNode())
6270 MVT VT = SVOp->getValueType(0).getSimpleVT();
6272 unsigned NumElems = VT.getVectorNumElements();
6273 unsigned NumLaneElems = NumElems / 2;
6275 DebugLoc dl = SVOp->getDebugLoc();
6276 MVT EltVT = VT.getVectorElementType();
6277 MVT NVT = MVT::getVectorVT(EltVT, NumLaneElems);
6280 SmallVector<int, 16> Mask;
6281 for (unsigned l = 0; l < 2; ++l) {
6282 // Build a shuffle mask for the output, discovering on the fly which
6283 // input vectors to use as shuffle operands (recorded in InputUsed).
6284 // If building a suitable shuffle vector proves too hard, then bail
6285 // out with UseBuildVector set.
6286 bool UseBuildVector = false;
6287 int InputUsed[2] = { -1, -1 }; // Not yet discovered.
6288 unsigned LaneStart = l * NumLaneElems;
6289 for (unsigned i = 0; i != NumLaneElems; ++i) {
6290 // The mask element. This indexes into the input.
6291 int Idx = SVOp->getMaskElt(i+LaneStart);
6293 // the mask element does not index into any input vector.
6298 // The input vector this mask element indexes into.
6299 int Input = Idx / NumLaneElems;
6301 // Turn the index into an offset from the start of the input vector.
6302 Idx -= Input * NumLaneElems;
6304 // Find or create a shuffle vector operand to hold this input.
6306 for (OpNo = 0; OpNo < array_lengthof(InputUsed); ++OpNo) {
6307 if (InputUsed[OpNo] == Input)
6308 // This input vector is already an operand.
6310 if (InputUsed[OpNo] < 0) {
6311 // Create a new operand for this input vector.
6312 InputUsed[OpNo] = Input;
6317 if (OpNo >= array_lengthof(InputUsed)) {
6318 // More than two input vectors used! Give up on trying to create a
6319 // shuffle vector. Insert all elements into a BUILD_VECTOR instead.
6320 UseBuildVector = true;
6324 // Add the mask index for the new shuffle vector.
6325 Mask.push_back(Idx + OpNo * NumLaneElems);
6328 if (UseBuildVector) {
6329 SmallVector<SDValue, 16> SVOps;
6330 for (unsigned i = 0; i != NumLaneElems; ++i) {
6331 // The mask element. This indexes into the input.
6332 int Idx = SVOp->getMaskElt(i+LaneStart);
6334 SVOps.push_back(DAG.getUNDEF(EltVT));
6338 // The input vector this mask element indexes into.
6339 int Input = Idx / NumElems;
6341 // Turn the index into an offset from the start of the input vector.
6342 Idx -= Input * NumElems;
6344 // Extract the vector element by hand.
6345 SVOps.push_back(DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, EltVT,
6346 SVOp->getOperand(Input),
6347 DAG.getIntPtrConstant(Idx)));
6350 // Construct the output using a BUILD_VECTOR.
6351 Output[l] = DAG.getNode(ISD::BUILD_VECTOR, dl, NVT, &SVOps[0],
6353 } else if (InputUsed[0] < 0) {
6354 // No input vectors were used! The result is undefined.
6355 Output[l] = DAG.getUNDEF(NVT);
6357 SDValue Op0 = Extract128BitVector(SVOp->getOperand(InputUsed[0] / 2),
6358 (InputUsed[0] % 2) * NumLaneElems,
6360 // If only one input was used, use an undefined vector for the other.
6361 SDValue Op1 = (InputUsed[1] < 0) ? DAG.getUNDEF(NVT) :
6362 Extract128BitVector(SVOp->getOperand(InputUsed[1] / 2),
6363 (InputUsed[1] % 2) * NumLaneElems, DAG, dl);
6364 // At least one input vector was used. Create a new shuffle vector.
6365 Output[l] = DAG.getVectorShuffle(NVT, dl, Op0, Op1, &Mask[0]);
6371 // Concatenate the result back
6372 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, Output[0], Output[1]);
6375 /// LowerVECTOR_SHUFFLE_128v4 - Handle all 128-bit wide vectors with
6376 /// 4 elements, and match them with several different shuffle types.
6378 LowerVECTOR_SHUFFLE_128v4(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG) {
6379 SDValue V1 = SVOp->getOperand(0);
6380 SDValue V2 = SVOp->getOperand(1);
6381 DebugLoc dl = SVOp->getDebugLoc();
6382 MVT VT = SVOp->getValueType(0).getSimpleVT();
6384 assert(VT.is128BitVector() && "Unsupported vector size");
6386 std::pair<int, int> Locs[4];
6387 int Mask1[] = { -1, -1, -1, -1 };
6388 SmallVector<int, 8> PermMask(SVOp->getMask().begin(), SVOp->getMask().end());
6392 for (unsigned i = 0; i != 4; ++i) {
6393 int Idx = PermMask[i];
6395 Locs[i] = std::make_pair(-1, -1);
6397 assert(Idx < 8 && "Invalid VECTOR_SHUFFLE index!");
6399 Locs[i] = std::make_pair(0, NumLo);
6403 Locs[i] = std::make_pair(1, NumHi);
6405 Mask1[2+NumHi] = Idx;
6411 if (NumLo <= 2 && NumHi <= 2) {
6412 // If no more than two elements come from either vector. This can be
6413 // implemented with two shuffles. First shuffle gather the elements.
6414 // The second shuffle, which takes the first shuffle as both of its
6415 // vector operands, put the elements into the right order.
6416 V1 = DAG.getVectorShuffle(VT, dl, V1, V2, &Mask1[0]);
6418 int Mask2[] = { -1, -1, -1, -1 };
6420 for (unsigned i = 0; i != 4; ++i)
6421 if (Locs[i].first != -1) {
6422 unsigned Idx = (i < 2) ? 0 : 4;
6423 Idx += Locs[i].first * 2 + Locs[i].second;
6427 return DAG.getVectorShuffle(VT, dl, V1, V1, &Mask2[0]);
6430 if (NumLo == 3 || NumHi == 3) {
6431 // Otherwise, we must have three elements from one vector, call it X, and
6432 // one element from the other, call it Y. First, use a shufps to build an
6433 // intermediate vector with the one element from Y and the element from X
6434 // that will be in the same half in the final destination (the indexes don't
6435 // matter). Then, use a shufps to build the final vector, taking the half
6436 // containing the element from Y from the intermediate, and the other half
6439 // Normalize it so the 3 elements come from V1.
6440 CommuteVectorShuffleMask(PermMask, 4);
6444 // Find the element from V2.
6446 for (HiIndex = 0; HiIndex < 3; ++HiIndex) {
6447 int Val = PermMask[HiIndex];
6454 Mask1[0] = PermMask[HiIndex];
6456 Mask1[2] = PermMask[HiIndex^1];
6458 V2 = DAG.getVectorShuffle(VT, dl, V1, V2, &Mask1[0]);
6461 Mask1[0] = PermMask[0];
6462 Mask1[1] = PermMask[1];
6463 Mask1[2] = HiIndex & 1 ? 6 : 4;
6464 Mask1[3] = HiIndex & 1 ? 4 : 6;
6465 return DAG.getVectorShuffle(VT, dl, V1, V2, &Mask1[0]);
6468 Mask1[0] = HiIndex & 1 ? 2 : 0;
6469 Mask1[1] = HiIndex & 1 ? 0 : 2;
6470 Mask1[2] = PermMask[2];
6471 Mask1[3] = PermMask[3];
6476 return DAG.getVectorShuffle(VT, dl, V2, V1, &Mask1[0]);
6479 // Break it into (shuffle shuffle_hi, shuffle_lo).
6480 int LoMask[] = { -1, -1, -1, -1 };
6481 int HiMask[] = { -1, -1, -1, -1 };
6483 int *MaskPtr = LoMask;
6484 unsigned MaskIdx = 0;
6487 for (unsigned i = 0; i != 4; ++i) {
6494 int Idx = PermMask[i];
6496 Locs[i] = std::make_pair(-1, -1);
6497 } else if (Idx < 4) {
6498 Locs[i] = std::make_pair(MaskIdx, LoIdx);
6499 MaskPtr[LoIdx] = Idx;
6502 Locs[i] = std::make_pair(MaskIdx, HiIdx);
6503 MaskPtr[HiIdx] = Idx;
6508 SDValue LoShuffle = DAG.getVectorShuffle(VT, dl, V1, V2, &LoMask[0]);
6509 SDValue HiShuffle = DAG.getVectorShuffle(VT, dl, V1, V2, &HiMask[0]);
6510 int MaskOps[] = { -1, -1, -1, -1 };
6511 for (unsigned i = 0; i != 4; ++i)
6512 if (Locs[i].first != -1)
6513 MaskOps[i] = Locs[i].first * 4 + Locs[i].second;
6514 return DAG.getVectorShuffle(VT, dl, LoShuffle, HiShuffle, &MaskOps[0]);
6517 static bool MayFoldVectorLoad(SDValue V) {
6518 while (V.hasOneUse() && V.getOpcode() == ISD::BITCAST)
6519 V = V.getOperand(0);
6521 if (V.hasOneUse() && V.getOpcode() == ISD::SCALAR_TO_VECTOR)
6522 V = V.getOperand(0);
6523 if (V.hasOneUse() && V.getOpcode() == ISD::BUILD_VECTOR &&
6524 V.getNumOperands() == 2 && V.getOperand(1).getOpcode() == ISD::UNDEF)
6525 // BUILD_VECTOR (load), undef
6526 V = V.getOperand(0);
6528 return MayFoldLoad(V);
6532 SDValue getMOVDDup(SDValue &Op, DebugLoc &dl, SDValue V1, SelectionDAG &DAG) {
6533 EVT VT = Op.getValueType();
6535 // Canonizalize to v2f64.
6536 V1 = DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, V1);
6537 return DAG.getNode(ISD::BITCAST, dl, VT,
6538 getTargetShuffleNode(X86ISD::MOVDDUP, dl, MVT::v2f64,
6543 SDValue getMOVLowToHigh(SDValue &Op, DebugLoc &dl, SelectionDAG &DAG,
6545 SDValue V1 = Op.getOperand(0);
6546 SDValue V2 = Op.getOperand(1);
6547 EVT VT = Op.getValueType();
6549 assert(VT != MVT::v2i64 && "unsupported shuffle type");
6551 if (HasSSE2 && VT == MVT::v2f64)
6552 return getTargetShuffleNode(X86ISD::MOVLHPD, dl, VT, V1, V2, DAG);
6554 // v4f32 or v4i32: canonizalized to v4f32 (which is legal for SSE1)
6555 return DAG.getNode(ISD::BITCAST, dl, VT,
6556 getTargetShuffleNode(X86ISD::MOVLHPS, dl, MVT::v4f32,
6557 DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, V1),
6558 DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, V2), DAG));
6562 SDValue getMOVHighToLow(SDValue &Op, DebugLoc &dl, SelectionDAG &DAG) {
6563 SDValue V1 = Op.getOperand(0);
6564 SDValue V2 = Op.getOperand(1);
6565 EVT VT = Op.getValueType();
6567 assert((VT == MVT::v4i32 || VT == MVT::v4f32) &&
6568 "unsupported shuffle type");
6570 if (V2.getOpcode() == ISD::UNDEF)
6574 return getTargetShuffleNode(X86ISD::MOVHLPS, dl, VT, V1, V2, DAG);
6578 SDValue getMOVLP(SDValue &Op, DebugLoc &dl, SelectionDAG &DAG, bool HasSSE2) {
6579 SDValue V1 = Op.getOperand(0);
6580 SDValue V2 = Op.getOperand(1);
6581 EVT VT = Op.getValueType();
6582 unsigned NumElems = VT.getVectorNumElements();
6584 // Use MOVLPS and MOVLPD in case V1 or V2 are loads. During isel, the second
6585 // operand of these instructions is only memory, so check if there's a
6586 // potencial load folding here, otherwise use SHUFPS or MOVSD to match the
6588 bool CanFoldLoad = false;
6590 // Trivial case, when V2 comes from a load.
6591 if (MayFoldVectorLoad(V2))
6594 // When V1 is a load, it can be folded later into a store in isel, example:
6595 // (store (v4f32 (X86Movlps (load addr:$src1), VR128:$src2)), addr:$src1)
6597 // (MOVLPSmr addr:$src1, VR128:$src2)
6598 // So, recognize this potential and also use MOVLPS or MOVLPD
6599 else if (MayFoldVectorLoad(V1) && MayFoldIntoStore(Op))
6602 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
6604 if (HasSSE2 && NumElems == 2)
6605 return getTargetShuffleNode(X86ISD::MOVLPD, dl, VT, V1, V2, DAG);
6608 // If we don't care about the second element, proceed to use movss.
6609 if (SVOp->getMaskElt(1) != -1)
6610 return getTargetShuffleNode(X86ISD::MOVLPS, dl, VT, V1, V2, DAG);
6613 // movl and movlp will both match v2i64, but v2i64 is never matched by
6614 // movl earlier because we make it strict to avoid messing with the movlp load
6615 // folding logic (see the code above getMOVLP call). Match it here then,
6616 // this is horrible, but will stay like this until we move all shuffle
6617 // matching to x86 specific nodes. Note that for the 1st condition all
6618 // types are matched with movsd.
6620 // FIXME: isMOVLMask should be checked and matched before getMOVLP,
6621 // as to remove this logic from here, as much as possible
6622 if (NumElems == 2 || !isMOVLMask(SVOp->getMask(), VT))
6623 return getTargetShuffleNode(X86ISD::MOVSD, dl, VT, V1, V2, DAG);
6624 return getTargetShuffleNode(X86ISD::MOVSS, dl, VT, V1, V2, DAG);
6627 assert(VT != MVT::v4i32 && "unsupported shuffle type");
6629 // Invert the operand order and use SHUFPS to match it.
6630 return getTargetShuffleNode(X86ISD::SHUFP, dl, VT, V2, V1,
6631 getShuffleSHUFImmediate(SVOp), DAG);
6634 // Reduce a vector shuffle to zext.
6636 X86TargetLowering::LowerVectorIntExtend(SDValue Op, SelectionDAG &DAG) const {
6637 // PMOVZX is only available from SSE41.
6638 if (!Subtarget->hasSSE41())
6641 EVT VT = Op.getValueType();
6643 // Only AVX2 support 256-bit vector integer extending.
6644 if (!Subtarget->hasInt256() && VT.is256BitVector())
6647 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
6648 DebugLoc DL = Op.getDebugLoc();
6649 SDValue V1 = Op.getOperand(0);
6650 SDValue V2 = Op.getOperand(1);
6651 unsigned NumElems = VT.getVectorNumElements();
6653 // Extending is an unary operation and the element type of the source vector
6654 // won't be equal to or larger than i64.
6655 if (V2.getOpcode() != ISD::UNDEF || !VT.isInteger() ||
6656 VT.getVectorElementType() == MVT::i64)
6659 // Find the expansion ratio, e.g. expanding from i8 to i32 has a ratio of 4.
6660 unsigned Shift = 1; // Start from 2, i.e. 1 << 1.
6661 while ((1U << Shift) < NumElems) {
6662 if (SVOp->getMaskElt(1U << Shift) == 1)
6665 // The maximal ratio is 8, i.e. from i8 to i64.
6670 // Check the shuffle mask.
6671 unsigned Mask = (1U << Shift) - 1;
6672 for (unsigned i = 0; i != NumElems; ++i) {
6673 int EltIdx = SVOp->getMaskElt(i);
6674 if ((i & Mask) != 0 && EltIdx != -1)
6676 if ((i & Mask) == 0 && (unsigned)EltIdx != (i >> Shift))
6680 LLVMContext *Context = DAG.getContext();
6681 unsigned NBits = VT.getVectorElementType().getSizeInBits() << Shift;
6682 EVT NeVT = EVT::getIntegerVT(*Context, NBits);
6683 EVT NVT = EVT::getVectorVT(*Context, NeVT, NumElems >> Shift);
6685 if (!isTypeLegal(NVT))
6688 // Simplify the operand as it's prepared to be fed into shuffle.
6689 unsigned SignificantBits = NVT.getSizeInBits() >> Shift;
6690 if (V1.getOpcode() == ISD::BITCAST &&
6691 V1.getOperand(0).getOpcode() == ISD::SCALAR_TO_VECTOR &&
6692 V1.getOperand(0).getOperand(0).getOpcode() == ISD::EXTRACT_VECTOR_ELT &&
6694 .getOperand(0).getValueType().getSizeInBits() == SignificantBits) {
6695 // (bitcast (sclr2vec (ext_vec_elt x))) -> (bitcast x)
6696 SDValue V = V1.getOperand(0).getOperand(0).getOperand(0);
6697 ConstantSDNode *CIdx =
6698 dyn_cast<ConstantSDNode>(V1.getOperand(0).getOperand(0).getOperand(1));
6699 // If it's foldable, i.e. normal load with single use, we will let code
6700 // selection to fold it. Otherwise, we will short the conversion sequence.
6701 if (CIdx && CIdx->getZExtValue() == 0 &&
6702 (!ISD::isNormalLoad(V.getNode()) || !V.hasOneUse())) {
6703 if (V.getValueSizeInBits() > V1.getValueSizeInBits()) {
6704 // The "ext_vec_elt" node is wider than the result node.
6705 // In this case we should extract subvector from V.
6706 // (bitcast (sclr2vec (ext_vec_elt x))) -> (bitcast (extract_subvector x)).
6707 unsigned Ratio = V.getValueSizeInBits() / V1.getValueSizeInBits();
6708 EVT FullVT = V.getValueType();
6709 EVT SubVecVT = EVT::getVectorVT(*Context,
6710 FullVT.getVectorElementType(),
6711 FullVT.getVectorNumElements()/Ratio);
6712 V = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, SubVecVT, V,
6713 DAG.getIntPtrConstant(0));
6715 V1 = DAG.getNode(ISD::BITCAST, DL, V1.getValueType(), V);
6719 return DAG.getNode(ISD::BITCAST, DL, VT,
6720 DAG.getNode(X86ISD::VZEXT, DL, NVT, V1));
6724 X86TargetLowering::NormalizeVectorShuffle(SDValue Op, SelectionDAG &DAG) const {
6725 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
6726 MVT VT = Op.getValueType().getSimpleVT();
6727 DebugLoc dl = Op.getDebugLoc();
6728 SDValue V1 = Op.getOperand(0);
6729 SDValue V2 = Op.getOperand(1);
6731 if (isZeroShuffle(SVOp))
6732 return getZeroVector(VT, Subtarget, DAG, dl);
6734 // Handle splat operations
6735 if (SVOp->isSplat()) {
6736 // Use vbroadcast whenever the splat comes from a foldable load
6737 SDValue Broadcast = LowerVectorBroadcast(Op, DAG);
6738 if (Broadcast.getNode())
6742 // Check integer expanding shuffles.
6743 SDValue NewOp = LowerVectorIntExtend(Op, DAG);
6744 if (NewOp.getNode())
6747 // If the shuffle can be profitably rewritten as a narrower shuffle, then
6749 if (VT == MVT::v8i16 || VT == MVT::v16i8 ||
6750 VT == MVT::v16i16 || VT == MVT::v32i8) {
6751 SDValue NewOp = RewriteAsNarrowerShuffle(SVOp, DAG);
6752 if (NewOp.getNode())
6753 return DAG.getNode(ISD::BITCAST, dl, VT, NewOp);
6754 } else if ((VT == MVT::v4i32 ||
6755 (VT == MVT::v4f32 && Subtarget->hasSSE2()))) {
6756 // FIXME: Figure out a cleaner way to do this.
6757 // Try to make use of movq to zero out the top part.
6758 if (ISD::isBuildVectorAllZeros(V2.getNode())) {
6759 SDValue NewOp = RewriteAsNarrowerShuffle(SVOp, DAG);
6760 if (NewOp.getNode()) {
6761 MVT NewVT = NewOp.getValueType().getSimpleVT();
6762 if (isCommutedMOVLMask(cast<ShuffleVectorSDNode>(NewOp)->getMask(),
6763 NewVT, true, false))
6764 return getVZextMovL(VT, NewVT, NewOp.getOperand(0),
6765 DAG, Subtarget, dl);
6767 } else if (ISD::isBuildVectorAllZeros(V1.getNode())) {
6768 SDValue NewOp = RewriteAsNarrowerShuffle(SVOp, DAG);
6769 if (NewOp.getNode()) {
6770 MVT NewVT = NewOp.getValueType().getSimpleVT();
6771 if (isMOVLMask(cast<ShuffleVectorSDNode>(NewOp)->getMask(), NewVT))
6772 return getVZextMovL(VT, NewVT, NewOp.getOperand(1),
6773 DAG, Subtarget, dl);
6781 X86TargetLowering::LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) const {
6782 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
6783 SDValue V1 = Op.getOperand(0);
6784 SDValue V2 = Op.getOperand(1);
6785 MVT VT = Op.getValueType().getSimpleVT();
6786 DebugLoc dl = Op.getDebugLoc();
6787 unsigned NumElems = VT.getVectorNumElements();
6788 bool V1IsUndef = V1.getOpcode() == ISD::UNDEF;
6789 bool V2IsUndef = V2.getOpcode() == ISD::UNDEF;
6790 bool V1IsSplat = false;
6791 bool V2IsSplat = false;
6792 bool HasSSE2 = Subtarget->hasSSE2();
6793 bool HasFp256 = Subtarget->hasFp256();
6794 bool HasInt256 = Subtarget->hasInt256();
6795 MachineFunction &MF = DAG.getMachineFunction();
6796 bool OptForSize = MF.getFunction()->getAttributes().
6797 hasAttribute(AttributeSet::FunctionIndex, Attribute::OptimizeForSize);
6799 assert(VT.getSizeInBits() != 64 && "Can't lower MMX shuffles");
6801 if (V1IsUndef && V2IsUndef)
6802 return DAG.getUNDEF(VT);
6804 assert(!V1IsUndef && "Op 1 of shuffle should not be undef");
6806 // Vector shuffle lowering takes 3 steps:
6808 // 1) Normalize the input vectors. Here splats, zeroed vectors, profitable
6809 // narrowing and commutation of operands should be handled.
6810 // 2) Matching of shuffles with known shuffle masks to x86 target specific
6812 // 3) Rewriting of unmatched masks into new generic shuffle operations,
6813 // so the shuffle can be broken into other shuffles and the legalizer can
6814 // try the lowering again.
6816 // The general idea is that no vector_shuffle operation should be left to
6817 // be matched during isel, all of them must be converted to a target specific
6820 // Normalize the input vectors. Here splats, zeroed vectors, profitable
6821 // narrowing and commutation of operands should be handled. The actual code
6822 // doesn't include all of those, work in progress...
6823 SDValue NewOp = NormalizeVectorShuffle(Op, DAG);
6824 if (NewOp.getNode())
6827 SmallVector<int, 8> M(SVOp->getMask().begin(), SVOp->getMask().end());
6829 // NOTE: isPSHUFDMask can also match both masks below (unpckl_undef and
6830 // unpckh_undef). Only use pshufd if speed is more important than size.
6831 if (OptForSize && isUNPCKL_v_undef_Mask(M, VT, HasInt256))
6832 return getTargetShuffleNode(X86ISD::UNPCKL, dl, VT, V1, V1, DAG);
6833 if (OptForSize && isUNPCKH_v_undef_Mask(M, VT, HasInt256))
6834 return getTargetShuffleNode(X86ISD::UNPCKH, dl, VT, V1, V1, DAG);
6836 if (isMOVDDUPMask(M, VT) && Subtarget->hasSSE3() &&
6837 V2IsUndef && MayFoldVectorLoad(V1))
6838 return getMOVDDup(Op, dl, V1, DAG);
6840 if (isMOVHLPS_v_undef_Mask(M, VT))
6841 return getMOVHighToLow(Op, dl, DAG);
6843 // Use to match splats
6844 if (HasSSE2 && isUNPCKHMask(M, VT, HasInt256) && V2IsUndef &&
6845 (VT == MVT::v2f64 || VT == MVT::v2i64))
6846 return getTargetShuffleNode(X86ISD::UNPCKH, dl, VT, V1, V1, DAG);
6848 if (isPSHUFDMask(M, VT)) {
6849 // The actual implementation will match the mask in the if above and then
6850 // during isel it can match several different instructions, not only pshufd
6851 // as its name says, sad but true, emulate the behavior for now...
6852 if (isMOVDDUPMask(M, VT) && ((VT == MVT::v4f32 || VT == MVT::v2i64)))
6853 return getTargetShuffleNode(X86ISD::MOVLHPS, dl, VT, V1, V1, DAG);
6855 unsigned TargetMask = getShuffleSHUFImmediate(SVOp);
6857 if (HasSSE2 && (VT == MVT::v4f32 || VT == MVT::v4i32))
6858 return getTargetShuffleNode(X86ISD::PSHUFD, dl, VT, V1, TargetMask, DAG);
6860 if (HasFp256 && (VT == MVT::v4f32 || VT == MVT::v2f64))
6861 return getTargetShuffleNode(X86ISD::VPERMILP, dl, VT, V1, TargetMask,
6864 return getTargetShuffleNode(X86ISD::SHUFP, dl, VT, V1, V1,
6868 // Check if this can be converted into a logical shift.
6869 bool isLeft = false;
6872 bool isShift = HasSSE2 && isVectorShift(SVOp, DAG, isLeft, ShVal, ShAmt);
6873 if (isShift && ShVal.hasOneUse()) {
6874 // If the shifted value has multiple uses, it may be cheaper to use
6875 // v_set0 + movlhps or movhlps, etc.
6876 MVT EltVT = VT.getVectorElementType();
6877 ShAmt *= EltVT.getSizeInBits();
6878 return getVShift(isLeft, VT, ShVal, ShAmt, DAG, *this, dl);
6881 if (isMOVLMask(M, VT)) {
6882 if (ISD::isBuildVectorAllZeros(V1.getNode()))
6883 return getVZextMovL(VT, VT, V2, DAG, Subtarget, dl);
6884 if (!isMOVLPMask(M, VT)) {
6885 if (HasSSE2 && (VT == MVT::v2i64 || VT == MVT::v2f64))
6886 return getTargetShuffleNode(X86ISD::MOVSD, dl, VT, V1, V2, DAG);
6888 if (VT == MVT::v4i32 || VT == MVT::v4f32)
6889 return getTargetShuffleNode(X86ISD::MOVSS, dl, VT, V1, V2, DAG);
6893 // FIXME: fold these into legal mask.
6894 if (isMOVLHPSMask(M, VT) && !isUNPCKLMask(M, VT, HasInt256))
6895 return getMOVLowToHigh(Op, dl, DAG, HasSSE2);
6897 if (isMOVHLPSMask(M, VT))
6898 return getMOVHighToLow(Op, dl, DAG);
6900 if (V2IsUndef && isMOVSHDUPMask(M, VT, Subtarget))
6901 return getTargetShuffleNode(X86ISD::MOVSHDUP, dl, VT, V1, DAG);
6903 if (V2IsUndef && isMOVSLDUPMask(M, VT, Subtarget))
6904 return getTargetShuffleNode(X86ISD::MOVSLDUP, dl, VT, V1, DAG);
6906 if (isMOVLPMask(M, VT))
6907 return getMOVLP(Op, dl, DAG, HasSSE2);
6909 if (ShouldXformToMOVHLPS(M, VT) ||
6910 ShouldXformToMOVLP(V1.getNode(), V2.getNode(), M, VT))
6911 return CommuteVectorShuffle(SVOp, DAG);
6914 // No better options. Use a vshldq / vsrldq.
6915 MVT EltVT = VT.getVectorElementType();
6916 ShAmt *= EltVT.getSizeInBits();
6917 return getVShift(isLeft, VT, ShVal, ShAmt, DAG, *this, dl);
6920 bool Commuted = false;
6921 // FIXME: This should also accept a bitcast of a splat? Be careful, not
6922 // 1,1,1,1 -> v8i16 though.
6923 V1IsSplat = isSplatVector(V1.getNode());
6924 V2IsSplat = isSplatVector(V2.getNode());
6926 // Canonicalize the splat or undef, if present, to be on the RHS.
6927 if (!V2IsUndef && V1IsSplat && !V2IsSplat) {
6928 CommuteVectorShuffleMask(M, NumElems);
6930 std::swap(V1IsSplat, V2IsSplat);
6934 if (isCommutedMOVLMask(M, VT, V2IsSplat, V2IsUndef)) {
6935 // Shuffling low element of v1 into undef, just return v1.
6938 // If V2 is a splat, the mask may be malformed such as <4,3,3,3>, which
6939 // the instruction selector will not match, so get a canonical MOVL with
6940 // swapped operands to undo the commute.
6941 return getMOVL(DAG, dl, VT, V2, V1);
6944 if (isUNPCKLMask(M, VT, HasInt256))
6945 return getTargetShuffleNode(X86ISD::UNPCKL, dl, VT, V1, V2, DAG);
6947 if (isUNPCKHMask(M, VT, HasInt256))
6948 return getTargetShuffleNode(X86ISD::UNPCKH, dl, VT, V1, V2, DAG);
6951 // Normalize mask so all entries that point to V2 points to its first
6952 // element then try to match unpck{h|l} again. If match, return a
6953 // new vector_shuffle with the corrected mask.p
6954 SmallVector<int, 8> NewMask(M.begin(), M.end());
6955 NormalizeMask(NewMask, NumElems);
6956 if (isUNPCKLMask(NewMask, VT, HasInt256, true))
6957 return getTargetShuffleNode(X86ISD::UNPCKL, dl, VT, V1, V2, DAG);
6958 if (isUNPCKHMask(NewMask, VT, HasInt256, true))
6959 return getTargetShuffleNode(X86ISD::UNPCKH, dl, VT, V1, V2, DAG);
6963 // Commute is back and try unpck* again.
6964 // FIXME: this seems wrong.
6965 CommuteVectorShuffleMask(M, NumElems);
6967 std::swap(V1IsSplat, V2IsSplat);
6970 if (isUNPCKLMask(M, VT, HasInt256))
6971 return getTargetShuffleNode(X86ISD::UNPCKL, dl, VT, V1, V2, DAG);
6973 if (isUNPCKHMask(M, VT, HasInt256))
6974 return getTargetShuffleNode(X86ISD::UNPCKH, dl, VT, V1, V2, DAG);
6977 // Normalize the node to match x86 shuffle ops if needed
6978 if (!V2IsUndef && (isSHUFPMask(M, VT, HasFp256, /* Commuted */ true)))
6979 return CommuteVectorShuffle(SVOp, DAG);
6981 // The checks below are all present in isShuffleMaskLegal, but they are
6982 // inlined here right now to enable us to directly emit target specific
6983 // nodes, and remove one by one until they don't return Op anymore.
6985 if (isPALIGNRMask(M, VT, Subtarget))
6986 return getTargetShuffleNode(X86ISD::PALIGNR, dl, VT, V1, V2,
6987 getShufflePALIGNRImmediate(SVOp),
6990 if (ShuffleVectorSDNode::isSplatMask(&M[0], VT) &&
6991 SVOp->getSplatIndex() == 0 && V2IsUndef) {
6992 if (VT == MVT::v2f64 || VT == MVT::v2i64)
6993 return getTargetShuffleNode(X86ISD::UNPCKL, dl, VT, V1, V1, DAG);
6996 if (isPSHUFHWMask(M, VT, HasInt256))
6997 return getTargetShuffleNode(X86ISD::PSHUFHW, dl, VT, V1,
6998 getShufflePSHUFHWImmediate(SVOp),
7001 if (isPSHUFLWMask(M, VT, HasInt256))
7002 return getTargetShuffleNode(X86ISD::PSHUFLW, dl, VT, V1,
7003 getShufflePSHUFLWImmediate(SVOp),
7006 if (isSHUFPMask(M, VT, HasFp256))
7007 return getTargetShuffleNode(X86ISD::SHUFP, dl, VT, V1, V2,
7008 getShuffleSHUFImmediate(SVOp), DAG);
7010 if (isUNPCKL_v_undef_Mask(M, VT, HasInt256))
7011 return getTargetShuffleNode(X86ISD::UNPCKL, dl, VT, V1, V1, DAG);
7012 if (isUNPCKH_v_undef_Mask(M, VT, HasInt256))
7013 return getTargetShuffleNode(X86ISD::UNPCKH, dl, VT, V1, V1, DAG);
7015 //===--------------------------------------------------------------------===//
7016 // Generate target specific nodes for 128 or 256-bit shuffles only
7017 // supported in the AVX instruction set.
7020 // Handle VMOVDDUPY permutations
7021 if (V2IsUndef && isMOVDDUPYMask(M, VT, HasFp256))
7022 return getTargetShuffleNode(X86ISD::MOVDDUP, dl, VT, V1, DAG);
7024 // Handle VPERMILPS/D* permutations
7025 if (isVPERMILPMask(M, VT, HasFp256)) {
7026 if (HasInt256 && VT == MVT::v8i32)
7027 return getTargetShuffleNode(X86ISD::PSHUFD, dl, VT, V1,
7028 getShuffleSHUFImmediate(SVOp), DAG);
7029 return getTargetShuffleNode(X86ISD::VPERMILP, dl, VT, V1,
7030 getShuffleSHUFImmediate(SVOp), DAG);
7033 // Handle VPERM2F128/VPERM2I128 permutations
7034 if (isVPERM2X128Mask(M, VT, HasFp256))
7035 return getTargetShuffleNode(X86ISD::VPERM2X128, dl, VT, V1,
7036 V2, getShuffleVPERM2X128Immediate(SVOp), DAG);
7038 SDValue BlendOp = LowerVECTOR_SHUFFLEtoBlend(SVOp, Subtarget, DAG);
7039 if (BlendOp.getNode())
7042 if (V2IsUndef && HasInt256 && (VT == MVT::v8i32 || VT == MVT::v8f32)) {
7043 SmallVector<SDValue, 8> permclMask;
7044 for (unsigned i = 0; i != 8; ++i) {
7045 permclMask.push_back(DAG.getConstant((M[i]>=0) ? M[i] : 0, MVT::i32));
7047 SDValue Mask = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v8i32,
7049 // Bitcast is for VPERMPS since mask is v8i32 but node takes v8f32
7050 return DAG.getNode(X86ISD::VPERMV, dl, VT,
7051 DAG.getNode(ISD::BITCAST, dl, VT, Mask), V1);
7054 if (V2IsUndef && HasInt256 && (VT == MVT::v4i64 || VT == MVT::v4f64))
7055 return getTargetShuffleNode(X86ISD::VPERMI, dl, VT, V1,
7056 getShuffleCLImmediate(SVOp), DAG);
7058 //===--------------------------------------------------------------------===//
7059 // Since no target specific shuffle was selected for this generic one,
7060 // lower it into other known shuffles. FIXME: this isn't true yet, but
7061 // this is the plan.
7064 // Handle v8i16 specifically since SSE can do byte extraction and insertion.
7065 if (VT == MVT::v8i16) {
7066 SDValue NewOp = LowerVECTOR_SHUFFLEv8i16(Op, Subtarget, DAG);
7067 if (NewOp.getNode())
7071 if (VT == MVT::v16i8) {
7072 SDValue NewOp = LowerVECTOR_SHUFFLEv16i8(SVOp, DAG, *this);
7073 if (NewOp.getNode())
7077 if (VT == MVT::v32i8) {
7078 SDValue NewOp = LowerVECTOR_SHUFFLEv32i8(SVOp, Subtarget, DAG);
7079 if (NewOp.getNode())
7083 // Handle all 128-bit wide vectors with 4 elements, and match them with
7084 // several different shuffle types.
7085 if (NumElems == 4 && VT.is128BitVector())
7086 return LowerVECTOR_SHUFFLE_128v4(SVOp, DAG);
7088 // Handle general 256-bit shuffles
7089 if (VT.is256BitVector())
7090 return LowerVECTOR_SHUFFLE_256(SVOp, DAG);
7095 static SDValue LowerEXTRACT_VECTOR_ELT_SSE4(SDValue Op, SelectionDAG &DAG) {
7096 MVT VT = Op.getValueType().getSimpleVT();
7097 DebugLoc dl = Op.getDebugLoc();
7099 if (!Op.getOperand(0).getValueType().getSimpleVT().is128BitVector())
7102 if (VT.getSizeInBits() == 8) {
7103 SDValue Extract = DAG.getNode(X86ISD::PEXTRB, dl, MVT::i32,
7104 Op.getOperand(0), Op.getOperand(1));
7105 SDValue Assert = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Extract,
7106 DAG.getValueType(VT));
7107 return DAG.getNode(ISD::TRUNCATE, dl, VT, Assert);
7110 if (VT.getSizeInBits() == 16) {
7111 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
7112 // If Idx is 0, it's cheaper to do a move instead of a pextrw.
7114 return DAG.getNode(ISD::TRUNCATE, dl, MVT::i16,
7115 DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32,
7116 DAG.getNode(ISD::BITCAST, dl,
7120 SDValue Extract = DAG.getNode(X86ISD::PEXTRW, dl, MVT::i32,
7121 Op.getOperand(0), Op.getOperand(1));
7122 SDValue Assert = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Extract,
7123 DAG.getValueType(VT));
7124 return DAG.getNode(ISD::TRUNCATE, dl, VT, Assert);
7127 if (VT == MVT::f32) {
7128 // EXTRACTPS outputs to a GPR32 register which will require a movd to copy
7129 // the result back to FR32 register. It's only worth matching if the
7130 // result has a single use which is a store or a bitcast to i32. And in
7131 // the case of a store, it's not worth it if the index is a constant 0,
7132 // because a MOVSSmr can be used instead, which is smaller and faster.
7133 if (!Op.hasOneUse())
7135 SDNode *User = *Op.getNode()->use_begin();
7136 if ((User->getOpcode() != ISD::STORE ||
7137 (isa<ConstantSDNode>(Op.getOperand(1)) &&
7138 cast<ConstantSDNode>(Op.getOperand(1))->isNullValue())) &&
7139 (User->getOpcode() != ISD::BITCAST ||
7140 User->getValueType(0) != MVT::i32))
7142 SDValue Extract = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32,
7143 DAG.getNode(ISD::BITCAST, dl, MVT::v4i32,
7146 return DAG.getNode(ISD::BITCAST, dl, MVT::f32, Extract);
7149 if (VT == MVT::i32 || VT == MVT::i64) {
7150 // ExtractPS/pextrq works with constant index.
7151 if (isa<ConstantSDNode>(Op.getOperand(1)))
7158 X86TargetLowering::LowerEXTRACT_VECTOR_ELT(SDValue Op,
7159 SelectionDAG &DAG) const {
7160 if (!isa<ConstantSDNode>(Op.getOperand(1)))
7163 SDValue Vec = Op.getOperand(0);
7164 MVT VecVT = Vec.getValueType().getSimpleVT();
7166 // If this is a 256-bit vector result, first extract the 128-bit vector and
7167 // then extract the element from the 128-bit vector.
7168 if (VecVT.is256BitVector()) {
7169 DebugLoc dl = Op.getNode()->getDebugLoc();
7170 unsigned NumElems = VecVT.getVectorNumElements();
7171 SDValue Idx = Op.getOperand(1);
7172 unsigned IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
7174 // Get the 128-bit vector.
7175 Vec = Extract128BitVector(Vec, IdxVal, DAG, dl);
7177 if (IdxVal >= NumElems/2)
7178 IdxVal -= NumElems/2;
7179 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, Op.getValueType(), Vec,
7180 DAG.getConstant(IdxVal, MVT::i32));
7183 assert(VecVT.is128BitVector() && "Unexpected vector length");
7185 if (Subtarget->hasSSE41()) {
7186 SDValue Res = LowerEXTRACT_VECTOR_ELT_SSE4(Op, DAG);
7191 MVT VT = Op.getValueType().getSimpleVT();
7192 DebugLoc dl = Op.getDebugLoc();
7193 // TODO: handle v16i8.
7194 if (VT.getSizeInBits() == 16) {
7195 SDValue Vec = Op.getOperand(0);
7196 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
7198 return DAG.getNode(ISD::TRUNCATE, dl, MVT::i16,
7199 DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32,
7200 DAG.getNode(ISD::BITCAST, dl,
7203 // Transform it so it match pextrw which produces a 32-bit result.
7204 MVT EltVT = MVT::i32;
7205 SDValue Extract = DAG.getNode(X86ISD::PEXTRW, dl, EltVT,
7206 Op.getOperand(0), Op.getOperand(1));
7207 SDValue Assert = DAG.getNode(ISD::AssertZext, dl, EltVT, Extract,
7208 DAG.getValueType(VT));
7209 return DAG.getNode(ISD::TRUNCATE, dl, VT, Assert);
7212 if (VT.getSizeInBits() == 32) {
7213 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
7217 // SHUFPS the element to the lowest double word, then movss.
7218 int Mask[4] = { static_cast<int>(Idx), -1, -1, -1 };
7219 MVT VVT = Op.getOperand(0).getValueType().getSimpleVT();
7220 SDValue Vec = DAG.getVectorShuffle(VVT, dl, Op.getOperand(0),
7221 DAG.getUNDEF(VVT), Mask);
7222 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, VT, Vec,
7223 DAG.getIntPtrConstant(0));
7226 if (VT.getSizeInBits() == 64) {
7227 // FIXME: .td only matches this for <2 x f64>, not <2 x i64> on 32b
7228 // FIXME: seems like this should be unnecessary if mov{h,l}pd were taught
7229 // to match extract_elt for f64.
7230 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
7234 // UNPCKHPD the element to the lowest double word, then movsd.
7235 // Note if the lower 64 bits of the result of the UNPCKHPD is then stored
7236 // to a f64mem, the whole operation is folded into a single MOVHPDmr.
7237 int Mask[2] = { 1, -1 };
7238 MVT VVT = Op.getOperand(0).getValueType().getSimpleVT();
7239 SDValue Vec = DAG.getVectorShuffle(VVT, dl, Op.getOperand(0),
7240 DAG.getUNDEF(VVT), Mask);
7241 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, VT, Vec,
7242 DAG.getIntPtrConstant(0));
7248 static SDValue LowerINSERT_VECTOR_ELT_SSE4(SDValue Op, SelectionDAG &DAG) {
7249 MVT VT = Op.getValueType().getSimpleVT();
7250 MVT EltVT = VT.getVectorElementType();
7251 DebugLoc dl = Op.getDebugLoc();
7253 SDValue N0 = Op.getOperand(0);
7254 SDValue N1 = Op.getOperand(1);
7255 SDValue N2 = Op.getOperand(2);
7257 if (!VT.is128BitVector())
7260 if ((EltVT.getSizeInBits() == 8 || EltVT.getSizeInBits() == 16) &&
7261 isa<ConstantSDNode>(N2)) {
7263 if (VT == MVT::v8i16)
7264 Opc = X86ISD::PINSRW;
7265 else if (VT == MVT::v16i8)
7266 Opc = X86ISD::PINSRB;
7268 Opc = X86ISD::PINSRB;
7270 // Transform it so it match pinsr{b,w} which expects a GR32 as its second
7272 if (N1.getValueType() != MVT::i32)
7273 N1 = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, N1);
7274 if (N2.getValueType() != MVT::i32)
7275 N2 = DAG.getIntPtrConstant(cast<ConstantSDNode>(N2)->getZExtValue());
7276 return DAG.getNode(Opc, dl, VT, N0, N1, N2);
7279 if (EltVT == MVT::f32 && isa<ConstantSDNode>(N2)) {
7280 // Bits [7:6] of the constant are the source select. This will always be
7281 // zero here. The DAG Combiner may combine an extract_elt index into these
7282 // bits. For example (insert (extract, 3), 2) could be matched by putting
7283 // the '3' into bits [7:6] of X86ISD::INSERTPS.
7284 // Bits [5:4] of the constant are the destination select. This is the
7285 // value of the incoming immediate.
7286 // Bits [3:0] of the constant are the zero mask. The DAG Combiner may
7287 // combine either bitwise AND or insert of float 0.0 to set these bits.
7288 N2 = DAG.getIntPtrConstant(cast<ConstantSDNode>(N2)->getZExtValue() << 4);
7289 // Create this as a scalar to vector..
7290 N1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4f32, N1);
7291 return DAG.getNode(X86ISD::INSERTPS, dl, VT, N0, N1, N2);
7294 if ((EltVT == MVT::i32 || EltVT == MVT::i64) && isa<ConstantSDNode>(N2)) {
7295 // PINSR* works with constant index.
7302 X86TargetLowering::LowerINSERT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) const {
7303 MVT VT = Op.getValueType().getSimpleVT();
7304 MVT EltVT = VT.getVectorElementType();
7306 DebugLoc dl = Op.getDebugLoc();
7307 SDValue N0 = Op.getOperand(0);
7308 SDValue N1 = Op.getOperand(1);
7309 SDValue N2 = Op.getOperand(2);
7311 // If this is a 256-bit vector result, first extract the 128-bit vector,
7312 // insert the element into the extracted half and then place it back.
7313 if (VT.is256BitVector()) {
7314 if (!isa<ConstantSDNode>(N2))
7317 // Get the desired 128-bit vector half.
7318 unsigned NumElems = VT.getVectorNumElements();
7319 unsigned IdxVal = cast<ConstantSDNode>(N2)->getZExtValue();
7320 SDValue V = Extract128BitVector(N0, IdxVal, DAG, dl);
7322 // Insert the element into the desired half.
7323 bool Upper = IdxVal >= NumElems/2;
7324 V = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, V.getValueType(), V, N1,
7325 DAG.getConstant(Upper ? IdxVal-NumElems/2 : IdxVal, MVT::i32));
7327 // Insert the changed part back to the 256-bit vector
7328 return Insert128BitVector(N0, V, IdxVal, DAG, dl);
7331 if (Subtarget->hasSSE41())
7332 return LowerINSERT_VECTOR_ELT_SSE4(Op, DAG);
7334 if (EltVT == MVT::i8)
7337 if (EltVT.getSizeInBits() == 16 && isa<ConstantSDNode>(N2)) {
7338 // Transform it so it match pinsrw which expects a 16-bit value in a GR32
7339 // as its second argument.
7340 if (N1.getValueType() != MVT::i32)
7341 N1 = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, N1);
7342 if (N2.getValueType() != MVT::i32)
7343 N2 = DAG.getIntPtrConstant(cast<ConstantSDNode>(N2)->getZExtValue());
7344 return DAG.getNode(X86ISD::PINSRW, dl, VT, N0, N1, N2);
7349 static SDValue LowerSCALAR_TO_VECTOR(SDValue Op, SelectionDAG &DAG) {
7350 LLVMContext *Context = DAG.getContext();
7351 DebugLoc dl = Op.getDebugLoc();
7352 MVT OpVT = Op.getValueType().getSimpleVT();
7354 // If this is a 256-bit vector result, first insert into a 128-bit
7355 // vector and then insert into the 256-bit vector.
7356 if (!OpVT.is128BitVector()) {
7357 // Insert into a 128-bit vector.
7358 EVT VT128 = EVT::getVectorVT(*Context,
7359 OpVT.getVectorElementType(),
7360 OpVT.getVectorNumElements() / 2);
7362 Op = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT128, Op.getOperand(0));
7364 // Insert the 128-bit vector.
7365 return Insert128BitVector(DAG.getUNDEF(OpVT), Op, 0, DAG, dl);
7368 if (OpVT == MVT::v1i64 &&
7369 Op.getOperand(0).getValueType() == MVT::i64)
7370 return DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v1i64, Op.getOperand(0));
7372 SDValue AnyExt = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, Op.getOperand(0));
7373 assert(OpVT.is128BitVector() && "Expected an SSE type!");
7374 return DAG.getNode(ISD::BITCAST, dl, OpVT,
7375 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32,AnyExt));
7378 // Lower a node with an EXTRACT_SUBVECTOR opcode. This may result in
7379 // a simple subregister reference or explicit instructions to grab
7380 // upper bits of a vector.
7381 static SDValue LowerEXTRACT_SUBVECTOR(SDValue Op, const X86Subtarget *Subtarget,
7382 SelectionDAG &DAG) {
7383 if (Subtarget->hasFp256()) {
7384 DebugLoc dl = Op.getNode()->getDebugLoc();
7385 SDValue Vec = Op.getNode()->getOperand(0);
7386 SDValue Idx = Op.getNode()->getOperand(1);
7388 if (Op.getNode()->getValueType(0).is128BitVector() &&
7389 Vec.getNode()->getValueType(0).is256BitVector() &&
7390 isa<ConstantSDNode>(Idx)) {
7391 unsigned IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
7392 return Extract128BitVector(Vec, IdxVal, DAG, dl);
7398 // Lower a node with an INSERT_SUBVECTOR opcode. This may result in a
7399 // simple superregister reference or explicit instructions to insert
7400 // the upper bits of a vector.
7401 static SDValue LowerINSERT_SUBVECTOR(SDValue Op, const X86Subtarget *Subtarget,
7402 SelectionDAG &DAG) {
7403 if (Subtarget->hasFp256()) {
7404 DebugLoc dl = Op.getNode()->getDebugLoc();
7405 SDValue Vec = Op.getNode()->getOperand(0);
7406 SDValue SubVec = Op.getNode()->getOperand(1);
7407 SDValue Idx = Op.getNode()->getOperand(2);
7409 if (Op.getNode()->getValueType(0).is256BitVector() &&
7410 SubVec.getNode()->getValueType(0).is128BitVector() &&
7411 isa<ConstantSDNode>(Idx)) {
7412 unsigned IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
7413 return Insert128BitVector(Vec, SubVec, IdxVal, DAG, dl);
7419 // ConstantPool, JumpTable, GlobalAddress, and ExternalSymbol are lowered as
7420 // their target countpart wrapped in the X86ISD::Wrapper node. Suppose N is
7421 // one of the above mentioned nodes. It has to be wrapped because otherwise
7422 // Select(N) returns N. So the raw TargetGlobalAddress nodes, etc. can only
7423 // be used to form addressing mode. These wrapped nodes will be selected
7426 X86TargetLowering::LowerConstantPool(SDValue Op, SelectionDAG &DAG) const {
7427 ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
7429 // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
7431 unsigned char OpFlag = 0;
7432 unsigned WrapperKind = X86ISD::Wrapper;
7433 CodeModel::Model M = getTargetMachine().getCodeModel();
7435 if (Subtarget->isPICStyleRIPRel() &&
7436 (M == CodeModel::Small || M == CodeModel::Kernel))
7437 WrapperKind = X86ISD::WrapperRIP;
7438 else if (Subtarget->isPICStyleGOT())
7439 OpFlag = X86II::MO_GOTOFF;
7440 else if (Subtarget->isPICStyleStubPIC())
7441 OpFlag = X86II::MO_PIC_BASE_OFFSET;
7443 SDValue Result = DAG.getTargetConstantPool(CP->getConstVal(), getPointerTy(),
7445 CP->getOffset(), OpFlag);
7446 DebugLoc DL = CP->getDebugLoc();
7447 Result = DAG.getNode(WrapperKind, DL, getPointerTy(), Result);
7448 // With PIC, the address is actually $g + Offset.
7450 Result = DAG.getNode(ISD::ADD, DL, getPointerTy(),
7451 DAG.getNode(X86ISD::GlobalBaseReg,
7452 DebugLoc(), getPointerTy()),
7459 SDValue X86TargetLowering::LowerJumpTable(SDValue Op, SelectionDAG &DAG) const {
7460 JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
7462 // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
7464 unsigned char OpFlag = 0;
7465 unsigned WrapperKind = X86ISD::Wrapper;
7466 CodeModel::Model M = getTargetMachine().getCodeModel();
7468 if (Subtarget->isPICStyleRIPRel() &&
7469 (M == CodeModel::Small || M == CodeModel::Kernel))
7470 WrapperKind = X86ISD::WrapperRIP;
7471 else if (Subtarget->isPICStyleGOT())
7472 OpFlag = X86II::MO_GOTOFF;
7473 else if (Subtarget->isPICStyleStubPIC())
7474 OpFlag = X86II::MO_PIC_BASE_OFFSET;
7476 SDValue Result = DAG.getTargetJumpTable(JT->getIndex(), getPointerTy(),
7478 DebugLoc DL = JT->getDebugLoc();
7479 Result = DAG.getNode(WrapperKind, DL, getPointerTy(), Result);
7481 // With PIC, the address is actually $g + Offset.
7483 Result = DAG.getNode(ISD::ADD, DL, getPointerTy(),
7484 DAG.getNode(X86ISD::GlobalBaseReg,
7485 DebugLoc(), getPointerTy()),
7492 X86TargetLowering::LowerExternalSymbol(SDValue Op, SelectionDAG &DAG) const {
7493 const char *Sym = cast<ExternalSymbolSDNode>(Op)->getSymbol();
7495 // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
7497 unsigned char OpFlag = 0;
7498 unsigned WrapperKind = X86ISD::Wrapper;
7499 CodeModel::Model M = getTargetMachine().getCodeModel();
7501 if (Subtarget->isPICStyleRIPRel() &&
7502 (M == CodeModel::Small || M == CodeModel::Kernel)) {
7503 if (Subtarget->isTargetDarwin() || Subtarget->isTargetELF())
7504 OpFlag = X86II::MO_GOTPCREL;
7505 WrapperKind = X86ISD::WrapperRIP;
7506 } else if (Subtarget->isPICStyleGOT()) {
7507 OpFlag = X86II::MO_GOT;
7508 } else if (Subtarget->isPICStyleStubPIC()) {
7509 OpFlag = X86II::MO_DARWIN_NONLAZY_PIC_BASE;
7510 } else if (Subtarget->isPICStyleStubNoDynamic()) {
7511 OpFlag = X86II::MO_DARWIN_NONLAZY;
7514 SDValue Result = DAG.getTargetExternalSymbol(Sym, getPointerTy(), OpFlag);
7516 DebugLoc DL = Op.getDebugLoc();
7517 Result = DAG.getNode(WrapperKind, DL, getPointerTy(), Result);
7519 // With PIC, the address is actually $g + Offset.
7520 if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
7521 !Subtarget->is64Bit()) {
7522 Result = DAG.getNode(ISD::ADD, DL, getPointerTy(),
7523 DAG.getNode(X86ISD::GlobalBaseReg,
7524 DebugLoc(), getPointerTy()),
7528 // For symbols that require a load from a stub to get the address, emit the
7530 if (isGlobalStubReference(OpFlag))
7531 Result = DAG.getLoad(getPointerTy(), DL, DAG.getEntryNode(), Result,
7532 MachinePointerInfo::getGOT(), false, false, false, 0);
7538 X86TargetLowering::LowerBlockAddress(SDValue Op, SelectionDAG &DAG) const {
7539 // Create the TargetBlockAddressAddress node.
7540 unsigned char OpFlags =
7541 Subtarget->ClassifyBlockAddressReference();
7542 CodeModel::Model M = getTargetMachine().getCodeModel();
7543 const BlockAddress *BA = cast<BlockAddressSDNode>(Op)->getBlockAddress();
7544 int64_t Offset = cast<BlockAddressSDNode>(Op)->getOffset();
7545 DebugLoc dl = Op.getDebugLoc();
7546 SDValue Result = DAG.getTargetBlockAddress(BA, getPointerTy(), Offset,
7549 if (Subtarget->isPICStyleRIPRel() &&
7550 (M == CodeModel::Small || M == CodeModel::Kernel))
7551 Result = DAG.getNode(X86ISD::WrapperRIP, dl, getPointerTy(), Result);
7553 Result = DAG.getNode(X86ISD::Wrapper, dl, getPointerTy(), Result);
7555 // With PIC, the address is actually $g + Offset.
7556 if (isGlobalRelativeToPICBase(OpFlags)) {
7557 Result = DAG.getNode(ISD::ADD, dl, getPointerTy(),
7558 DAG.getNode(X86ISD::GlobalBaseReg, dl, getPointerTy()),
7566 X86TargetLowering::LowerGlobalAddress(const GlobalValue *GV, DebugLoc dl,
7567 int64_t Offset, SelectionDAG &DAG) const {
7568 // Create the TargetGlobalAddress node, folding in the constant
7569 // offset if it is legal.
7570 unsigned char OpFlags =
7571 Subtarget->ClassifyGlobalReference(GV, getTargetMachine());
7572 CodeModel::Model M = getTargetMachine().getCodeModel();
7574 if (OpFlags == X86II::MO_NO_FLAG &&
7575 X86::isOffsetSuitableForCodeModel(Offset, M)) {
7576 // A direct static reference to a global.
7577 Result = DAG.getTargetGlobalAddress(GV, dl, getPointerTy(), Offset);
7580 Result = DAG.getTargetGlobalAddress(GV, dl, getPointerTy(), 0, OpFlags);
7583 if (Subtarget->isPICStyleRIPRel() &&
7584 (M == CodeModel::Small || M == CodeModel::Kernel))
7585 Result = DAG.getNode(X86ISD::WrapperRIP, dl, getPointerTy(), Result);
7587 Result = DAG.getNode(X86ISD::Wrapper, dl, getPointerTy(), Result);
7589 // With PIC, the address is actually $g + Offset.
7590 if (isGlobalRelativeToPICBase(OpFlags)) {
7591 Result = DAG.getNode(ISD::ADD, dl, getPointerTy(),
7592 DAG.getNode(X86ISD::GlobalBaseReg, dl, getPointerTy()),
7596 // For globals that require a load from a stub to get the address, emit the
7598 if (isGlobalStubReference(OpFlags))
7599 Result = DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(), Result,
7600 MachinePointerInfo::getGOT(), false, false, false, 0);
7602 // If there was a non-zero offset that we didn't fold, create an explicit
7605 Result = DAG.getNode(ISD::ADD, dl, getPointerTy(), Result,
7606 DAG.getConstant(Offset, getPointerTy()));
7612 X86TargetLowering::LowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const {
7613 const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
7614 int64_t Offset = cast<GlobalAddressSDNode>(Op)->getOffset();
7615 return LowerGlobalAddress(GV, Op.getDebugLoc(), Offset, DAG);
7619 GetTLSADDR(SelectionDAG &DAG, SDValue Chain, GlobalAddressSDNode *GA,
7620 SDValue *InFlag, const EVT PtrVT, unsigned ReturnReg,
7621 unsigned char OperandFlags, bool LocalDynamic = false) {
7622 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
7623 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
7624 DebugLoc dl = GA->getDebugLoc();
7625 SDValue TGA = DAG.getTargetGlobalAddress(GA->getGlobal(), dl,
7626 GA->getValueType(0),
7630 X86ISD::NodeType CallType = LocalDynamic ? X86ISD::TLSBASEADDR
7634 SDValue Ops[] = { Chain, TGA, *InFlag };
7635 Chain = DAG.getNode(CallType, dl, NodeTys, Ops, 3);
7637 SDValue Ops[] = { Chain, TGA };
7638 Chain = DAG.getNode(CallType, dl, NodeTys, Ops, 2);
7641 // TLSADDR will be codegen'ed as call. Inform MFI that function has calls.
7642 MFI->setAdjustsStack(true);
7644 SDValue Flag = Chain.getValue(1);
7645 return DAG.getCopyFromReg(Chain, dl, ReturnReg, PtrVT, Flag);
7648 // Lower ISD::GlobalTLSAddress using the "general dynamic" model, 32 bit
7650 LowerToTLSGeneralDynamicModel32(GlobalAddressSDNode *GA, SelectionDAG &DAG,
7653 DebugLoc dl = GA->getDebugLoc(); // ? function entry point might be better
7654 SDValue Chain = DAG.getCopyToReg(DAG.getEntryNode(), dl, X86::EBX,
7655 DAG.getNode(X86ISD::GlobalBaseReg,
7656 DebugLoc(), PtrVT), InFlag);
7657 InFlag = Chain.getValue(1);
7659 return GetTLSADDR(DAG, Chain, GA, &InFlag, PtrVT, X86::EAX, X86II::MO_TLSGD);
7662 // Lower ISD::GlobalTLSAddress using the "general dynamic" model, 64 bit
7664 LowerToTLSGeneralDynamicModel64(GlobalAddressSDNode *GA, SelectionDAG &DAG,
7666 return GetTLSADDR(DAG, DAG.getEntryNode(), GA, NULL, PtrVT,
7667 X86::RAX, X86II::MO_TLSGD);
7670 static SDValue LowerToTLSLocalDynamicModel(GlobalAddressSDNode *GA,
7674 DebugLoc dl = GA->getDebugLoc();
7676 // Get the start address of the TLS block for this module.
7677 X86MachineFunctionInfo* MFI = DAG.getMachineFunction()
7678 .getInfo<X86MachineFunctionInfo>();
7679 MFI->incNumLocalDynamicTLSAccesses();
7683 Base = GetTLSADDR(DAG, DAG.getEntryNode(), GA, NULL, PtrVT, X86::RAX,
7684 X86II::MO_TLSLD, /*LocalDynamic=*/true);
7687 SDValue Chain = DAG.getCopyToReg(DAG.getEntryNode(), dl, X86::EBX,
7688 DAG.getNode(X86ISD::GlobalBaseReg, DebugLoc(), PtrVT), InFlag);
7689 InFlag = Chain.getValue(1);
7690 Base = GetTLSADDR(DAG, Chain, GA, &InFlag, PtrVT, X86::EAX,
7691 X86II::MO_TLSLDM, /*LocalDynamic=*/true);
7694 // Note: the CleanupLocalDynamicTLSPass will remove redundant computations
7698 unsigned char OperandFlags = X86II::MO_DTPOFF;
7699 unsigned WrapperKind = X86ISD::Wrapper;
7700 SDValue TGA = DAG.getTargetGlobalAddress(GA->getGlobal(), dl,
7701 GA->getValueType(0),
7702 GA->getOffset(), OperandFlags);
7703 SDValue Offset = DAG.getNode(WrapperKind, dl, PtrVT, TGA);
7705 // Add x@dtpoff with the base.
7706 return DAG.getNode(ISD::ADD, dl, PtrVT, Offset, Base);
7709 // Lower ISD::GlobalTLSAddress using the "initial exec" or "local exec" model.
7710 static SDValue LowerToTLSExecModel(GlobalAddressSDNode *GA, SelectionDAG &DAG,
7711 const EVT PtrVT, TLSModel::Model model,
7712 bool is64Bit, bool isPIC) {
7713 DebugLoc dl = GA->getDebugLoc();
7715 // Get the Thread Pointer, which is %gs:0 (32-bit) or %fs:0 (64-bit).
7716 Value *Ptr = Constant::getNullValue(Type::getInt8PtrTy(*DAG.getContext(),
7717 is64Bit ? 257 : 256));
7719 SDValue ThreadPointer = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(),
7720 DAG.getIntPtrConstant(0),
7721 MachinePointerInfo(Ptr),
7722 false, false, false, 0);
7724 unsigned char OperandFlags = 0;
7725 // Most TLS accesses are not RIP relative, even on x86-64. One exception is
7727 unsigned WrapperKind = X86ISD::Wrapper;
7728 if (model == TLSModel::LocalExec) {
7729 OperandFlags = is64Bit ? X86II::MO_TPOFF : X86II::MO_NTPOFF;
7730 } else if (model == TLSModel::InitialExec) {
7732 OperandFlags = X86II::MO_GOTTPOFF;
7733 WrapperKind = X86ISD::WrapperRIP;
7735 OperandFlags = isPIC ? X86II::MO_GOTNTPOFF : X86II::MO_INDNTPOFF;
7738 llvm_unreachable("Unexpected model");
7741 // emit "addl x@ntpoff,%eax" (local exec)
7742 // or "addl x@indntpoff,%eax" (initial exec)
7743 // or "addl x@gotntpoff(%ebx) ,%eax" (initial exec, 32-bit pic)
7744 SDValue TGA = DAG.getTargetGlobalAddress(GA->getGlobal(), dl,
7745 GA->getValueType(0),
7746 GA->getOffset(), OperandFlags);
7747 SDValue Offset = DAG.getNode(WrapperKind, dl, PtrVT, TGA);
7749 if (model == TLSModel::InitialExec) {
7750 if (isPIC && !is64Bit) {
7751 Offset = DAG.getNode(ISD::ADD, dl, PtrVT,
7752 DAG.getNode(X86ISD::GlobalBaseReg, DebugLoc(), PtrVT),
7756 Offset = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), Offset,
7757 MachinePointerInfo::getGOT(), false, false, false,
7761 // The address of the thread local variable is the add of the thread
7762 // pointer with the offset of the variable.
7763 return DAG.getNode(ISD::ADD, dl, PtrVT, ThreadPointer, Offset);
7767 X86TargetLowering::LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const {
7769 GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op);
7770 const GlobalValue *GV = GA->getGlobal();
7772 if (Subtarget->isTargetELF()) {
7773 TLSModel::Model model = getTargetMachine().getTLSModel(GV);
7776 case TLSModel::GeneralDynamic:
7777 if (Subtarget->is64Bit())
7778 return LowerToTLSGeneralDynamicModel64(GA, DAG, getPointerTy());
7779 return LowerToTLSGeneralDynamicModel32(GA, DAG, getPointerTy());
7780 case TLSModel::LocalDynamic:
7781 return LowerToTLSLocalDynamicModel(GA, DAG, getPointerTy(),
7782 Subtarget->is64Bit());
7783 case TLSModel::InitialExec:
7784 case TLSModel::LocalExec:
7785 return LowerToTLSExecModel(GA, DAG, getPointerTy(), model,
7786 Subtarget->is64Bit(),
7787 getTargetMachine().getRelocationModel() == Reloc::PIC_);
7789 llvm_unreachable("Unknown TLS model.");
7792 if (Subtarget->isTargetDarwin()) {
7793 // Darwin only has one model of TLS. Lower to that.
7794 unsigned char OpFlag = 0;
7795 unsigned WrapperKind = Subtarget->isPICStyleRIPRel() ?
7796 X86ISD::WrapperRIP : X86ISD::Wrapper;
7798 // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
7800 bool PIC32 = (getTargetMachine().getRelocationModel() == Reloc::PIC_) &&
7801 !Subtarget->is64Bit();
7803 OpFlag = X86II::MO_TLVP_PIC_BASE;
7805 OpFlag = X86II::MO_TLVP;
7806 DebugLoc DL = Op.getDebugLoc();
7807 SDValue Result = DAG.getTargetGlobalAddress(GA->getGlobal(), DL,
7808 GA->getValueType(0),
7809 GA->getOffset(), OpFlag);
7810 SDValue Offset = DAG.getNode(WrapperKind, DL, getPointerTy(), Result);
7812 // With PIC32, the address is actually $g + Offset.
7814 Offset = DAG.getNode(ISD::ADD, DL, getPointerTy(),
7815 DAG.getNode(X86ISD::GlobalBaseReg,
7816 DebugLoc(), getPointerTy()),
7819 // Lowering the machine isd will make sure everything is in the right
7821 SDValue Chain = DAG.getEntryNode();
7822 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
7823 SDValue Args[] = { Chain, Offset };
7824 Chain = DAG.getNode(X86ISD::TLSCALL, DL, NodeTys, Args, 2);
7826 // TLSCALL will be codegen'ed as call. Inform MFI that function has calls.
7827 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
7828 MFI->setAdjustsStack(true);
7830 // And our return value (tls address) is in the standard call return value
7832 unsigned Reg = Subtarget->is64Bit() ? X86::RAX : X86::EAX;
7833 return DAG.getCopyFromReg(Chain, DL, Reg, getPointerTy(),
7837 if (Subtarget->isTargetWindows() || Subtarget->isTargetMingw()) {
7838 // Just use the implicit TLS architecture
7839 // Need to generate someting similar to:
7840 // mov rdx, qword [gs:abs 58H]; Load pointer to ThreadLocalStorage
7842 // mov ecx, dword [rel _tls_index]: Load index (from C runtime)
7843 // mov rcx, qword [rdx+rcx*8]
7844 // mov eax, .tls$:tlsvar
7845 // [rax+rcx] contains the address
7846 // Windows 64bit: gs:0x58
7847 // Windows 32bit: fs:__tls_array
7849 // If GV is an alias then use the aliasee for determining
7850 // thread-localness.
7851 if (const GlobalAlias *GA = dyn_cast<GlobalAlias>(GV))
7852 GV = GA->resolveAliasedGlobal(false);
7853 DebugLoc dl = GA->getDebugLoc();
7854 SDValue Chain = DAG.getEntryNode();
7856 // Get the Thread Pointer, which is %fs:__tls_array (32-bit) or
7857 // %gs:0x58 (64-bit). On MinGW, __tls_array is not available, so directly
7858 // use its literal value of 0x2C.
7859 Value *Ptr = Constant::getNullValue(Subtarget->is64Bit()
7860 ? Type::getInt8PtrTy(*DAG.getContext(),
7862 : Type::getInt32PtrTy(*DAG.getContext(),
7865 SDValue TlsArray = Subtarget->is64Bit() ? DAG.getIntPtrConstant(0x58) :
7866 (Subtarget->isTargetMingw() ? DAG.getIntPtrConstant(0x2C) :
7867 DAG.getExternalSymbol("_tls_array", getPointerTy()));
7869 SDValue ThreadPointer = DAG.getLoad(getPointerTy(), dl, Chain, TlsArray,
7870 MachinePointerInfo(Ptr),
7871 false, false, false, 0);
7873 // Load the _tls_index variable
7874 SDValue IDX = DAG.getExternalSymbol("_tls_index", getPointerTy());
7875 if (Subtarget->is64Bit())
7876 IDX = DAG.getExtLoad(ISD::ZEXTLOAD, dl, getPointerTy(), Chain,
7877 IDX, MachinePointerInfo(), MVT::i32,
7880 IDX = DAG.getLoad(getPointerTy(), dl, Chain, IDX, MachinePointerInfo(),
7881 false, false, false, 0);
7883 SDValue Scale = DAG.getConstant(Log2_64_Ceil(TD->getPointerSize()),
7885 IDX = DAG.getNode(ISD::SHL, dl, getPointerTy(), IDX, Scale);
7887 SDValue res = DAG.getNode(ISD::ADD, dl, getPointerTy(), ThreadPointer, IDX);
7888 res = DAG.getLoad(getPointerTy(), dl, Chain, res, MachinePointerInfo(),
7889 false, false, false, 0);
7891 // Get the offset of start of .tls section
7892 SDValue TGA = DAG.getTargetGlobalAddress(GA->getGlobal(), dl,
7893 GA->getValueType(0),
7894 GA->getOffset(), X86II::MO_SECREL);
7895 SDValue Offset = DAG.getNode(X86ISD::Wrapper, dl, getPointerTy(), TGA);
7897 // The address of the thread local variable is the add of the thread
7898 // pointer with the offset of the variable.
7899 return DAG.getNode(ISD::ADD, dl, getPointerTy(), res, Offset);
7902 llvm_unreachable("TLS not implemented for this target.");
7905 /// LowerShiftParts - Lower SRA_PARTS and friends, which return two i32 values
7906 /// and take a 2 x i32 value to shift plus a shift amount.
7907 SDValue X86TargetLowering::LowerShiftParts(SDValue Op, SelectionDAG &DAG) const{
7908 assert(Op.getNumOperands() == 3 && "Not a double-shift!");
7909 EVT VT = Op.getValueType();
7910 unsigned VTBits = VT.getSizeInBits();
7911 DebugLoc dl = Op.getDebugLoc();
7912 bool isSRA = Op.getOpcode() == ISD::SRA_PARTS;
7913 SDValue ShOpLo = Op.getOperand(0);
7914 SDValue ShOpHi = Op.getOperand(1);
7915 SDValue ShAmt = Op.getOperand(2);
7916 SDValue Tmp1 = isSRA ? DAG.getNode(ISD::SRA, dl, VT, ShOpHi,
7917 DAG.getConstant(VTBits - 1, MVT::i8))
7918 : DAG.getConstant(0, VT);
7921 if (Op.getOpcode() == ISD::SHL_PARTS) {
7922 Tmp2 = DAG.getNode(X86ISD::SHLD, dl, VT, ShOpHi, ShOpLo, ShAmt);
7923 Tmp3 = DAG.getNode(ISD::SHL, dl, VT, ShOpLo, ShAmt);
7925 Tmp2 = DAG.getNode(X86ISD::SHRD, dl, VT, ShOpLo, ShOpHi, ShAmt);
7926 Tmp3 = DAG.getNode(isSRA ? ISD::SRA : ISD::SRL, dl, VT, ShOpHi, ShAmt);
7929 SDValue AndNode = DAG.getNode(ISD::AND, dl, MVT::i8, ShAmt,
7930 DAG.getConstant(VTBits, MVT::i8));
7931 SDValue Cond = DAG.getNode(X86ISD::CMP, dl, MVT::i32,
7932 AndNode, DAG.getConstant(0, MVT::i8));
7935 SDValue CC = DAG.getConstant(X86::COND_NE, MVT::i8);
7936 SDValue Ops0[4] = { Tmp2, Tmp3, CC, Cond };
7937 SDValue Ops1[4] = { Tmp3, Tmp1, CC, Cond };
7939 if (Op.getOpcode() == ISD::SHL_PARTS) {
7940 Hi = DAG.getNode(X86ISD::CMOV, dl, VT, Ops0, 4);
7941 Lo = DAG.getNode(X86ISD::CMOV, dl, VT, Ops1, 4);
7943 Lo = DAG.getNode(X86ISD::CMOV, dl, VT, Ops0, 4);
7944 Hi = DAG.getNode(X86ISD::CMOV, dl, VT, Ops1, 4);
7947 SDValue Ops[2] = { Lo, Hi };
7948 return DAG.getMergeValues(Ops, 2, dl);
7951 SDValue X86TargetLowering::LowerSINT_TO_FP(SDValue Op,
7952 SelectionDAG &DAG) const {
7953 EVT SrcVT = Op.getOperand(0).getValueType();
7955 if (SrcVT.isVector())
7958 assert(SrcVT.getSimpleVT() <= MVT::i64 && SrcVT.getSimpleVT() >= MVT::i16 &&
7959 "Unknown SINT_TO_FP to lower!");
7961 // These are really Legal; return the operand so the caller accepts it as
7963 if (SrcVT == MVT::i32 && isScalarFPTypeInSSEReg(Op.getValueType()))
7965 if (SrcVT == MVT::i64 && isScalarFPTypeInSSEReg(Op.getValueType()) &&
7966 Subtarget->is64Bit()) {
7970 DebugLoc dl = Op.getDebugLoc();
7971 unsigned Size = SrcVT.getSizeInBits()/8;
7972 MachineFunction &MF = DAG.getMachineFunction();
7973 int SSFI = MF.getFrameInfo()->CreateStackObject(Size, Size, false);
7974 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
7975 SDValue Chain = DAG.getStore(DAG.getEntryNode(), dl, Op.getOperand(0),
7977 MachinePointerInfo::getFixedStack(SSFI),
7979 return BuildFILD(Op, SrcVT, Chain, StackSlot, DAG);
7982 SDValue X86TargetLowering::BuildFILD(SDValue Op, EVT SrcVT, SDValue Chain,
7984 SelectionDAG &DAG) const {
7986 DebugLoc DL = Op.getDebugLoc();
7988 bool useSSE = isScalarFPTypeInSSEReg(Op.getValueType());
7990 Tys = DAG.getVTList(MVT::f64, MVT::Other, MVT::Glue);
7992 Tys = DAG.getVTList(Op.getValueType(), MVT::Other);
7994 unsigned ByteSize = SrcVT.getSizeInBits()/8;
7996 FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(StackSlot);
7997 MachineMemOperand *MMO;
7999 int SSFI = FI->getIndex();
8001 DAG.getMachineFunction()
8002 .getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
8003 MachineMemOperand::MOLoad, ByteSize, ByteSize);
8005 MMO = cast<LoadSDNode>(StackSlot)->getMemOperand();
8006 StackSlot = StackSlot.getOperand(1);
8008 SDValue Ops[] = { Chain, StackSlot, DAG.getValueType(SrcVT) };
8009 SDValue Result = DAG.getMemIntrinsicNode(useSSE ? X86ISD::FILD_FLAG :
8011 Tys, Ops, array_lengthof(Ops),
8015 Chain = Result.getValue(1);
8016 SDValue InFlag = Result.getValue(2);
8018 // FIXME: Currently the FST is flagged to the FILD_FLAG. This
8019 // shouldn't be necessary except that RFP cannot be live across
8020 // multiple blocks. When stackifier is fixed, they can be uncoupled.
8021 MachineFunction &MF = DAG.getMachineFunction();
8022 unsigned SSFISize = Op.getValueType().getSizeInBits()/8;
8023 int SSFI = MF.getFrameInfo()->CreateStackObject(SSFISize, SSFISize, false);
8024 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
8025 Tys = DAG.getVTList(MVT::Other);
8027 Chain, Result, StackSlot, DAG.getValueType(Op.getValueType()), InFlag
8029 MachineMemOperand *MMO =
8030 DAG.getMachineFunction()
8031 .getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
8032 MachineMemOperand::MOStore, SSFISize, SSFISize);
8034 Chain = DAG.getMemIntrinsicNode(X86ISD::FST, DL, Tys,
8035 Ops, array_lengthof(Ops),
8036 Op.getValueType(), MMO);
8037 Result = DAG.getLoad(Op.getValueType(), DL, Chain, StackSlot,
8038 MachinePointerInfo::getFixedStack(SSFI),
8039 false, false, false, 0);
8045 // LowerUINT_TO_FP_i64 - 64-bit unsigned integer to double expansion.
8046 SDValue X86TargetLowering::LowerUINT_TO_FP_i64(SDValue Op,
8047 SelectionDAG &DAG) const {
8048 // This algorithm is not obvious. Here it is what we're trying to output:
8051 punpckldq (c0), %xmm0 // c0: (uint4){ 0x43300000U, 0x45300000U, 0U, 0U }
8052 subpd (c1), %xmm0 // c1: (double2){ 0x1.0p52, 0x1.0p52 * 0x1.0p32 }
8056 pshufd $0x4e, %xmm0, %xmm1
8061 DebugLoc dl = Op.getDebugLoc();
8062 LLVMContext *Context = DAG.getContext();
8064 // Build some magic constants.
8065 const uint32_t CV0[] = { 0x43300000, 0x45300000, 0, 0 };
8066 Constant *C0 = ConstantDataVector::get(*Context, CV0);
8067 SDValue CPIdx0 = DAG.getConstantPool(C0, getPointerTy(), 16);
8069 SmallVector<Constant*,2> CV1;
8071 ConstantFP::get(*Context, APFloat(APFloat::IEEEdouble,
8072 APInt(64, 0x4330000000000000ULL))));
8074 ConstantFP::get(*Context, APFloat(APFloat::IEEEdouble,
8075 APInt(64, 0x4530000000000000ULL))));
8076 Constant *C1 = ConstantVector::get(CV1);
8077 SDValue CPIdx1 = DAG.getConstantPool(C1, getPointerTy(), 16);
8079 // Load the 64-bit value into an XMM register.
8080 SDValue XR1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2i64,
8082 SDValue CLod0 = DAG.getLoad(MVT::v4i32, dl, DAG.getEntryNode(), CPIdx0,
8083 MachinePointerInfo::getConstantPool(),
8084 false, false, false, 16);
8085 SDValue Unpck1 = getUnpackl(DAG, dl, MVT::v4i32,
8086 DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, XR1),
8089 SDValue CLod1 = DAG.getLoad(MVT::v2f64, dl, CLod0.getValue(1), CPIdx1,
8090 MachinePointerInfo::getConstantPool(),
8091 false, false, false, 16);
8092 SDValue XR2F = DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, Unpck1);
8093 SDValue Sub = DAG.getNode(ISD::FSUB, dl, MVT::v2f64, XR2F, CLod1);
8096 if (Subtarget->hasSSE3()) {
8097 // FIXME: The 'haddpd' instruction may be slower than 'movhlps + addsd'.
8098 Result = DAG.getNode(X86ISD::FHADD, dl, MVT::v2f64, Sub, Sub);
8100 SDValue S2F = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, Sub);
8101 SDValue Shuffle = getTargetShuffleNode(X86ISD::PSHUFD, dl, MVT::v4i32,
8103 Result = DAG.getNode(ISD::FADD, dl, MVT::v2f64,
8104 DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, Shuffle),
8108 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Result,
8109 DAG.getIntPtrConstant(0));
8112 // LowerUINT_TO_FP_i32 - 32-bit unsigned integer to float expansion.
8113 SDValue X86TargetLowering::LowerUINT_TO_FP_i32(SDValue Op,
8114 SelectionDAG &DAG) const {
8115 DebugLoc dl = Op.getDebugLoc();
8116 // FP constant to bias correct the final result.
8117 SDValue Bias = DAG.getConstantFP(BitsToDouble(0x4330000000000000ULL),
8120 // Load the 32-bit value into an XMM register.
8121 SDValue Load = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32,
8124 // Zero out the upper parts of the register.
8125 Load = getShuffleVectorZeroOrUndef(Load, 0, true, Subtarget, DAG);
8127 Load = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64,
8128 DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, Load),
8129 DAG.getIntPtrConstant(0));
8131 // Or the load with the bias.
8132 SDValue Or = DAG.getNode(ISD::OR, dl, MVT::v2i64,
8133 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64,
8134 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
8136 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64,
8137 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
8138 MVT::v2f64, Bias)));
8139 Or = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64,
8140 DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, Or),
8141 DAG.getIntPtrConstant(0));
8143 // Subtract the bias.
8144 SDValue Sub = DAG.getNode(ISD::FSUB, dl, MVT::f64, Or, Bias);
8146 // Handle final rounding.
8147 EVT DestVT = Op.getValueType();
8149 if (DestVT.bitsLT(MVT::f64))
8150 return DAG.getNode(ISD::FP_ROUND, dl, DestVT, Sub,
8151 DAG.getIntPtrConstant(0));
8152 if (DestVT.bitsGT(MVT::f64))
8153 return DAG.getNode(ISD::FP_EXTEND, dl, DestVT, Sub);
8155 // Handle final rounding.
8159 SDValue X86TargetLowering::lowerUINT_TO_FP_vec(SDValue Op,
8160 SelectionDAG &DAG) const {
8161 SDValue N0 = Op.getOperand(0);
8162 EVT SVT = N0.getValueType();
8163 DebugLoc dl = Op.getDebugLoc();
8165 assert((SVT == MVT::v4i8 || SVT == MVT::v4i16 ||
8166 SVT == MVT::v8i8 || SVT == MVT::v8i16) &&
8167 "Custom UINT_TO_FP is not supported!");
8169 EVT NVT = EVT::getVectorVT(*DAG.getContext(), MVT::i32,
8170 SVT.getVectorNumElements());
8171 return DAG.getNode(ISD::SINT_TO_FP, dl, Op.getValueType(),
8172 DAG.getNode(ISD::ZERO_EXTEND, dl, NVT, N0));
8175 SDValue X86TargetLowering::LowerUINT_TO_FP(SDValue Op,
8176 SelectionDAG &DAG) const {
8177 SDValue N0 = Op.getOperand(0);
8178 DebugLoc dl = Op.getDebugLoc();
8180 if (Op.getValueType().isVector())
8181 return lowerUINT_TO_FP_vec(Op, DAG);
8183 // Since UINT_TO_FP is legal (it's marked custom), dag combiner won't
8184 // optimize it to a SINT_TO_FP when the sign bit is known zero. Perform
8185 // the optimization here.
8186 if (DAG.SignBitIsZero(N0))
8187 return DAG.getNode(ISD::SINT_TO_FP, dl, Op.getValueType(), N0);
8189 EVT SrcVT = N0.getValueType();
8190 EVT DstVT = Op.getValueType();
8191 if (SrcVT == MVT::i64 && DstVT == MVT::f64 && X86ScalarSSEf64)
8192 return LowerUINT_TO_FP_i64(Op, DAG);
8193 if (SrcVT == MVT::i32 && X86ScalarSSEf64)
8194 return LowerUINT_TO_FP_i32(Op, DAG);
8195 if (Subtarget->is64Bit() && SrcVT == MVT::i64 && DstVT == MVT::f32)
8198 // Make a 64-bit buffer, and use it to build an FILD.
8199 SDValue StackSlot = DAG.CreateStackTemporary(MVT::i64);
8200 if (SrcVT == MVT::i32) {
8201 SDValue WordOff = DAG.getConstant(4, getPointerTy());
8202 SDValue OffsetSlot = DAG.getNode(ISD::ADD, dl,
8203 getPointerTy(), StackSlot, WordOff);
8204 SDValue Store1 = DAG.getStore(DAG.getEntryNode(), dl, Op.getOperand(0),
8205 StackSlot, MachinePointerInfo(),
8207 SDValue Store2 = DAG.getStore(Store1, dl, DAG.getConstant(0, MVT::i32),
8208 OffsetSlot, MachinePointerInfo(),
8210 SDValue Fild = BuildFILD(Op, MVT::i64, Store2, StackSlot, DAG);
8214 assert(SrcVT == MVT::i64 && "Unexpected type in UINT_TO_FP");
8215 SDValue Store = DAG.getStore(DAG.getEntryNode(), dl, Op.getOperand(0),
8216 StackSlot, MachinePointerInfo(),
8218 // For i64 source, we need to add the appropriate power of 2 if the input
8219 // was negative. This is the same as the optimization in
8220 // DAGTypeLegalizer::ExpandIntOp_UNIT_TO_FP, and for it to be safe here,
8221 // we must be careful to do the computation in x87 extended precision, not
8222 // in SSE. (The generic code can't know it's OK to do this, or how to.)
8223 int SSFI = cast<FrameIndexSDNode>(StackSlot)->getIndex();
8224 MachineMemOperand *MMO =
8225 DAG.getMachineFunction()
8226 .getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
8227 MachineMemOperand::MOLoad, 8, 8);
8229 SDVTList Tys = DAG.getVTList(MVT::f80, MVT::Other);
8230 SDValue Ops[] = { Store, StackSlot, DAG.getValueType(MVT::i64) };
8231 SDValue Fild = DAG.getMemIntrinsicNode(X86ISD::FILD, dl, Tys, Ops, 3,
8234 APInt FF(32, 0x5F800000ULL);
8236 // Check whether the sign bit is set.
8237 SDValue SignSet = DAG.getSetCC(dl, getSetCCResultType(MVT::i64),
8238 Op.getOperand(0), DAG.getConstant(0, MVT::i64),
8241 // Build a 64 bit pair (0, FF) in the constant pool, with FF in the lo bits.
8242 SDValue FudgePtr = DAG.getConstantPool(
8243 ConstantInt::get(*DAG.getContext(), FF.zext(64)),
8246 // Get a pointer to FF if the sign bit was set, or to 0 otherwise.
8247 SDValue Zero = DAG.getIntPtrConstant(0);
8248 SDValue Four = DAG.getIntPtrConstant(4);
8249 SDValue Offset = DAG.getNode(ISD::SELECT, dl, Zero.getValueType(), SignSet,
8251 FudgePtr = DAG.getNode(ISD::ADD, dl, getPointerTy(), FudgePtr, Offset);
8253 // Load the value out, extending it from f32 to f80.
8254 // FIXME: Avoid the extend by constructing the right constant pool?
8255 SDValue Fudge = DAG.getExtLoad(ISD::EXTLOAD, dl, MVT::f80, DAG.getEntryNode(),
8256 FudgePtr, MachinePointerInfo::getConstantPool(),
8257 MVT::f32, false, false, 4);
8258 // Extend everything to 80 bits to force it to be done on x87.
8259 SDValue Add = DAG.getNode(ISD::FADD, dl, MVT::f80, Fild, Fudge);
8260 return DAG.getNode(ISD::FP_ROUND, dl, DstVT, Add, DAG.getIntPtrConstant(0));
8263 std::pair<SDValue,SDValue>
8264 X86TargetLowering:: FP_TO_INTHelper(SDValue Op, SelectionDAG &DAG,
8265 bool IsSigned, bool IsReplace) const {
8266 DebugLoc DL = Op.getDebugLoc();
8268 EVT DstTy = Op.getValueType();
8270 if (!IsSigned && !isIntegerTypeFTOL(DstTy)) {
8271 assert(DstTy == MVT::i32 && "Unexpected FP_TO_UINT");
8275 assert(DstTy.getSimpleVT() <= MVT::i64 &&
8276 DstTy.getSimpleVT() >= MVT::i16 &&
8277 "Unknown FP_TO_INT to lower!");
8279 // These are really Legal.
8280 if (DstTy == MVT::i32 &&
8281 isScalarFPTypeInSSEReg(Op.getOperand(0).getValueType()))
8282 return std::make_pair(SDValue(), SDValue());
8283 if (Subtarget->is64Bit() &&
8284 DstTy == MVT::i64 &&
8285 isScalarFPTypeInSSEReg(Op.getOperand(0).getValueType()))
8286 return std::make_pair(SDValue(), SDValue());
8288 // We lower FP->int64 either into FISTP64 followed by a load from a temporary
8289 // stack slot, or into the FTOL runtime function.
8290 MachineFunction &MF = DAG.getMachineFunction();
8291 unsigned MemSize = DstTy.getSizeInBits()/8;
8292 int SSFI = MF.getFrameInfo()->CreateStackObject(MemSize, MemSize, false);
8293 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
8296 if (!IsSigned && isIntegerTypeFTOL(DstTy))
8297 Opc = X86ISD::WIN_FTOL;
8299 switch (DstTy.getSimpleVT().SimpleTy) {
8300 default: llvm_unreachable("Invalid FP_TO_SINT to lower!");
8301 case MVT::i16: Opc = X86ISD::FP_TO_INT16_IN_MEM; break;
8302 case MVT::i32: Opc = X86ISD::FP_TO_INT32_IN_MEM; break;
8303 case MVT::i64: Opc = X86ISD::FP_TO_INT64_IN_MEM; break;
8306 SDValue Chain = DAG.getEntryNode();
8307 SDValue Value = Op.getOperand(0);
8308 EVT TheVT = Op.getOperand(0).getValueType();
8309 // FIXME This causes a redundant load/store if the SSE-class value is already
8310 // in memory, such as if it is on the callstack.
8311 if (isScalarFPTypeInSSEReg(TheVT)) {
8312 assert(DstTy == MVT::i64 && "Invalid FP_TO_SINT to lower!");
8313 Chain = DAG.getStore(Chain, DL, Value, StackSlot,
8314 MachinePointerInfo::getFixedStack(SSFI),
8316 SDVTList Tys = DAG.getVTList(Op.getOperand(0).getValueType(), MVT::Other);
8318 Chain, StackSlot, DAG.getValueType(TheVT)
8321 MachineMemOperand *MMO =
8322 MF.getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
8323 MachineMemOperand::MOLoad, MemSize, MemSize);
8324 Value = DAG.getMemIntrinsicNode(X86ISD::FLD, DL, Tys, Ops, 3,
8326 Chain = Value.getValue(1);
8327 SSFI = MF.getFrameInfo()->CreateStackObject(MemSize, MemSize, false);
8328 StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
8331 MachineMemOperand *MMO =
8332 MF.getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
8333 MachineMemOperand::MOStore, MemSize, MemSize);
8335 if (Opc != X86ISD::WIN_FTOL) {
8336 // Build the FP_TO_INT*_IN_MEM
8337 SDValue Ops[] = { Chain, Value, StackSlot };
8338 SDValue FIST = DAG.getMemIntrinsicNode(Opc, DL, DAG.getVTList(MVT::Other),
8339 Ops, 3, DstTy, MMO);
8340 return std::make_pair(FIST, StackSlot);
8342 SDValue ftol = DAG.getNode(X86ISD::WIN_FTOL, DL,
8343 DAG.getVTList(MVT::Other, MVT::Glue),
8345 SDValue eax = DAG.getCopyFromReg(ftol, DL, X86::EAX,
8346 MVT::i32, ftol.getValue(1));
8347 SDValue edx = DAG.getCopyFromReg(eax.getValue(1), DL, X86::EDX,
8348 MVT::i32, eax.getValue(2));
8349 SDValue Ops[] = { eax, edx };
8350 SDValue pair = IsReplace
8351 ? DAG.getNode(ISD::BUILD_PAIR, DL, MVT::i64, Ops, 2)
8352 : DAG.getMergeValues(Ops, 2, DL);
8353 return std::make_pair(pair, SDValue());
8357 static SDValue LowerAVXExtend(SDValue Op, SelectionDAG &DAG,
8358 const X86Subtarget *Subtarget) {
8359 MVT VT = Op->getValueType(0).getSimpleVT();
8360 SDValue In = Op->getOperand(0);
8361 MVT InVT = In.getValueType().getSimpleVT();
8362 DebugLoc dl = Op->getDebugLoc();
8364 // Optimize vectors in AVX mode:
8367 // Use vpunpcklwd for 4 lower elements v8i16 -> v4i32.
8368 // Use vpunpckhwd for 4 upper elements v8i16 -> v4i32.
8369 // Concat upper and lower parts.
8372 // Use vpunpckldq for 4 lower elements v4i32 -> v2i64.
8373 // Use vpunpckhdq for 4 upper elements v4i32 -> v2i64.
8374 // Concat upper and lower parts.
8377 if (((VT != MVT::v8i32) || (InVT != MVT::v8i16)) &&
8378 ((VT != MVT::v4i64) || (InVT != MVT::v4i32)))
8381 if (Subtarget->hasInt256())
8382 return DAG.getNode(X86ISD::VZEXT_MOVL, dl, VT, In);
8384 SDValue ZeroVec = getZeroVector(InVT, Subtarget, DAG, dl);
8385 SDValue Undef = DAG.getUNDEF(InVT);
8386 bool NeedZero = Op.getOpcode() == ISD::ZERO_EXTEND;
8387 SDValue OpLo = getUnpackl(DAG, dl, InVT, In, NeedZero ? ZeroVec : Undef);
8388 SDValue OpHi = getUnpackh(DAG, dl, InVT, In, NeedZero ? ZeroVec : Undef);
8390 MVT HVT = MVT::getVectorVT(VT.getVectorElementType(),
8391 VT.getVectorNumElements()/2);
8393 OpLo = DAG.getNode(ISD::BITCAST, dl, HVT, OpLo);
8394 OpHi = DAG.getNode(ISD::BITCAST, dl, HVT, OpHi);
8396 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, OpLo, OpHi);
8399 SDValue X86TargetLowering::LowerANY_EXTEND(SDValue Op,
8400 SelectionDAG &DAG) const {
8401 if (Subtarget->hasFp256()) {
8402 SDValue Res = LowerAVXExtend(Op, DAG, Subtarget);
8409 SDValue X86TargetLowering::LowerZERO_EXTEND(SDValue Op,
8410 SelectionDAG &DAG) const {
8411 DebugLoc DL = Op.getDebugLoc();
8412 MVT VT = Op.getValueType().getSimpleVT();
8413 SDValue In = Op.getOperand(0);
8414 MVT SVT = In.getValueType().getSimpleVT();
8416 if (Subtarget->hasFp256()) {
8417 SDValue Res = LowerAVXExtend(Op, DAG, Subtarget);
8422 if (!VT.is256BitVector() || !SVT.is128BitVector() ||
8423 VT.getVectorNumElements() != SVT.getVectorNumElements())
8426 assert(Subtarget->hasFp256() && "256-bit vector is observed without AVX!");
8428 // AVX2 has better support of integer extending.
8429 if (Subtarget->hasInt256())
8430 return DAG.getNode(X86ISD::VZEXT, DL, VT, In);
8432 SDValue Lo = DAG.getNode(X86ISD::VZEXT, DL, MVT::v4i32, In);
8433 static const int Mask[] = {4, 5, 6, 7, -1, -1, -1, -1};
8434 SDValue Hi = DAG.getNode(X86ISD::VZEXT, DL, MVT::v4i32,
8435 DAG.getVectorShuffle(MVT::v8i16, DL, In,
8436 DAG.getUNDEF(MVT::v8i16),
8439 return DAG.getNode(ISD::CONCAT_VECTORS, DL, MVT::v8i32, Lo, Hi);
8442 SDValue X86TargetLowering::LowerTRUNCATE(SDValue Op, SelectionDAG &DAG) const {
8443 DebugLoc DL = Op.getDebugLoc();
8444 MVT VT = Op.getValueType().getSimpleVT();
8445 SDValue In = Op.getOperand(0);
8446 MVT SVT = In.getValueType().getSimpleVT();
8448 if ((VT == MVT::v4i32) && (SVT == MVT::v4i64)) {
8449 // On AVX2, v4i64 -> v4i32 becomes VPERMD.
8450 if (Subtarget->hasInt256()) {
8451 static const int ShufMask[] = {0, 2, 4, 6, -1, -1, -1, -1};
8452 In = DAG.getNode(ISD::BITCAST, DL, MVT::v8i32, In);
8453 In = DAG.getVectorShuffle(MVT::v8i32, DL, In, DAG.getUNDEF(MVT::v8i32),
8455 return DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, VT, In,
8456 DAG.getIntPtrConstant(0));
8459 // On AVX, v4i64 -> v4i32 becomes a sequence that uses PSHUFD and MOVLHPS.
8460 SDValue OpLo = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, MVT::v2i64, In,
8461 DAG.getIntPtrConstant(0));
8462 SDValue OpHi = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, MVT::v2i64, In,
8463 DAG.getIntPtrConstant(2));
8465 OpLo = DAG.getNode(ISD::BITCAST, DL, MVT::v4i32, OpLo);
8466 OpHi = DAG.getNode(ISD::BITCAST, DL, MVT::v4i32, OpHi);
8469 static const int ShufMask1[] = {0, 2, 0, 0};
8470 SDValue Undef = DAG.getUNDEF(VT);
8471 OpLo = DAG.getVectorShuffle(VT, DL, OpLo, Undef, ShufMask1);
8472 OpHi = DAG.getVectorShuffle(VT, DL, OpHi, Undef, ShufMask1);
8474 // The MOVLHPS mask:
8475 static const int ShufMask2[] = {0, 1, 4, 5};
8476 return DAG.getVectorShuffle(VT, DL, OpLo, OpHi, ShufMask2);
8479 if ((VT == MVT::v8i16) && (SVT == MVT::v8i32)) {
8480 // On AVX2, v8i32 -> v8i16 becomed PSHUFB.
8481 if (Subtarget->hasInt256()) {
8482 In = DAG.getNode(ISD::BITCAST, DL, MVT::v32i8, In);
8484 SmallVector<SDValue,32> pshufbMask;
8485 for (unsigned i = 0; i < 2; ++i) {
8486 pshufbMask.push_back(DAG.getConstant(0x0, MVT::i8));
8487 pshufbMask.push_back(DAG.getConstant(0x1, MVT::i8));
8488 pshufbMask.push_back(DAG.getConstant(0x4, MVT::i8));
8489 pshufbMask.push_back(DAG.getConstant(0x5, MVT::i8));
8490 pshufbMask.push_back(DAG.getConstant(0x8, MVT::i8));
8491 pshufbMask.push_back(DAG.getConstant(0x9, MVT::i8));
8492 pshufbMask.push_back(DAG.getConstant(0xc, MVT::i8));
8493 pshufbMask.push_back(DAG.getConstant(0xd, MVT::i8));
8494 for (unsigned j = 0; j < 8; ++j)
8495 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
8497 SDValue BV = DAG.getNode(ISD::BUILD_VECTOR, DL, MVT::v32i8,
8498 &pshufbMask[0], 32);
8499 In = DAG.getNode(X86ISD::PSHUFB, DL, MVT::v32i8, In, BV);
8500 In = DAG.getNode(ISD::BITCAST, DL, MVT::v4i64, In);
8502 static const int ShufMask[] = {0, 2, -1, -1};
8503 In = DAG.getVectorShuffle(MVT::v4i64, DL, In, DAG.getUNDEF(MVT::v4i64),
8505 In = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, MVT::v2i64, In,
8506 DAG.getIntPtrConstant(0));
8507 return DAG.getNode(ISD::BITCAST, DL, VT, In);
8510 SDValue OpLo = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, MVT::v4i32, In,
8511 DAG.getIntPtrConstant(0));
8513 SDValue OpHi = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, MVT::v4i32, In,
8514 DAG.getIntPtrConstant(4));
8516 OpLo = DAG.getNode(ISD::BITCAST, DL, MVT::v16i8, OpLo);
8517 OpHi = DAG.getNode(ISD::BITCAST, DL, MVT::v16i8, OpHi);
8520 static const int ShufMask1[] = {0, 1, 4, 5, 8, 9, 12, 13,
8521 -1, -1, -1, -1, -1, -1, -1, -1};
8523 SDValue Undef = DAG.getUNDEF(MVT::v16i8);
8524 OpLo = DAG.getVectorShuffle(MVT::v16i8, DL, OpLo, Undef, ShufMask1);
8525 OpHi = DAG.getVectorShuffle(MVT::v16i8, DL, OpHi, Undef, ShufMask1);
8527 OpLo = DAG.getNode(ISD::BITCAST, DL, MVT::v4i32, OpLo);
8528 OpHi = DAG.getNode(ISD::BITCAST, DL, MVT::v4i32, OpHi);
8530 // The MOVLHPS Mask:
8531 static const int ShufMask2[] = {0, 1, 4, 5};
8532 SDValue res = DAG.getVectorShuffle(MVT::v4i32, DL, OpLo, OpHi, ShufMask2);
8533 return DAG.getNode(ISD::BITCAST, DL, MVT::v8i16, res);
8536 // Handle truncation of V256 to V128 using shuffles.
8537 if (!VT.is128BitVector() || !SVT.is256BitVector())
8540 assert(VT.getVectorNumElements() != SVT.getVectorNumElements() &&
8542 assert(Subtarget->hasFp256() && "256-bit vector without AVX!");
8544 unsigned NumElems = VT.getVectorNumElements();
8545 EVT NVT = EVT::getVectorVT(*DAG.getContext(), VT.getVectorElementType(),
8548 SmallVector<int, 16> MaskVec(NumElems * 2, -1);
8549 // Prepare truncation shuffle mask
8550 for (unsigned i = 0; i != NumElems; ++i)
8552 SDValue V = DAG.getVectorShuffle(NVT, DL,
8553 DAG.getNode(ISD::BITCAST, DL, NVT, In),
8554 DAG.getUNDEF(NVT), &MaskVec[0]);
8555 return DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, VT, V,
8556 DAG.getIntPtrConstant(0));
8559 SDValue X86TargetLowering::LowerFP_TO_SINT(SDValue Op,
8560 SelectionDAG &DAG) const {
8561 MVT VT = Op.getValueType().getSimpleVT();
8562 if (VT.isVector()) {
8563 if (VT == MVT::v8i16)
8564 return DAG.getNode(ISD::TRUNCATE, Op.getDebugLoc(), VT,
8565 DAG.getNode(ISD::FP_TO_SINT, Op.getDebugLoc(),
8566 MVT::v8i32, Op.getOperand(0)));
8570 std::pair<SDValue,SDValue> Vals = FP_TO_INTHelper(Op, DAG,
8571 /*IsSigned=*/ true, /*IsReplace=*/ false);
8572 SDValue FIST = Vals.first, StackSlot = Vals.second;
8573 // If FP_TO_INTHelper failed, the node is actually supposed to be Legal.
8574 if (FIST.getNode() == 0) return Op;
8576 if (StackSlot.getNode())
8578 return DAG.getLoad(Op.getValueType(), Op.getDebugLoc(),
8579 FIST, StackSlot, MachinePointerInfo(),
8580 false, false, false, 0);
8582 // The node is the result.
8586 SDValue X86TargetLowering::LowerFP_TO_UINT(SDValue Op,
8587 SelectionDAG &DAG) const {
8588 std::pair<SDValue,SDValue> Vals = FP_TO_INTHelper(Op, DAG,
8589 /*IsSigned=*/ false, /*IsReplace=*/ false);
8590 SDValue FIST = Vals.first, StackSlot = Vals.second;
8591 assert(FIST.getNode() && "Unexpected failure");
8593 if (StackSlot.getNode())
8595 return DAG.getLoad(Op.getValueType(), Op.getDebugLoc(),
8596 FIST, StackSlot, MachinePointerInfo(),
8597 false, false, false, 0);
8599 // The node is the result.
8603 static SDValue LowerFP_EXTEND(SDValue Op, SelectionDAG &DAG) {
8604 DebugLoc DL = Op.getDebugLoc();
8605 MVT VT = Op.getValueType().getSimpleVT();
8606 SDValue In = Op.getOperand(0);
8607 MVT SVT = In.getValueType().getSimpleVT();
8609 assert(SVT == MVT::v2f32 && "Only customize MVT::v2f32 type legalization!");
8611 return DAG.getNode(X86ISD::VFPEXT, DL, VT,
8612 DAG.getNode(ISD::CONCAT_VECTORS, DL, MVT::v4f32,
8613 In, DAG.getUNDEF(SVT)));
8616 SDValue X86TargetLowering::LowerFABS(SDValue Op, SelectionDAG &DAG) const {
8617 LLVMContext *Context = DAG.getContext();
8618 DebugLoc dl = Op.getDebugLoc();
8619 MVT VT = Op.getValueType().getSimpleVT();
8621 unsigned NumElts = VT == MVT::f64 ? 2 : 4;
8622 if (VT.isVector()) {
8623 EltVT = VT.getVectorElementType();
8624 NumElts = VT.getVectorNumElements();
8627 if (EltVT == MVT::f64)
8628 C = ConstantFP::get(*Context, APFloat(APFloat::IEEEdouble,
8629 APInt(64, ~(1ULL << 63))));
8631 C = ConstantFP::get(*Context, APFloat(APFloat::IEEEsingle,
8632 APInt(32, ~(1U << 31))));
8633 C = ConstantVector::getSplat(NumElts, C);
8634 SDValue CPIdx = DAG.getConstantPool(C, getPointerTy());
8635 unsigned Alignment = cast<ConstantPoolSDNode>(CPIdx)->getAlignment();
8636 SDValue Mask = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
8637 MachinePointerInfo::getConstantPool(),
8638 false, false, false, Alignment);
8639 if (VT.isVector()) {
8640 MVT ANDVT = VT.is128BitVector() ? MVT::v2i64 : MVT::v4i64;
8641 return DAG.getNode(ISD::BITCAST, dl, VT,
8642 DAG.getNode(ISD::AND, dl, ANDVT,
8643 DAG.getNode(ISD::BITCAST, dl, ANDVT,
8645 DAG.getNode(ISD::BITCAST, dl, ANDVT, Mask)));
8647 return DAG.getNode(X86ISD::FAND, dl, VT, Op.getOperand(0), Mask);
8650 SDValue X86TargetLowering::LowerFNEG(SDValue Op, SelectionDAG &DAG) const {
8651 LLVMContext *Context = DAG.getContext();
8652 DebugLoc dl = Op.getDebugLoc();
8653 MVT VT = Op.getValueType().getSimpleVT();
8655 unsigned NumElts = VT == MVT::f64 ? 2 : 4;
8656 if (VT.isVector()) {
8657 EltVT = VT.getVectorElementType();
8658 NumElts = VT.getVectorNumElements();
8661 if (EltVT == MVT::f64)
8662 C = ConstantFP::get(*Context, APFloat(APFloat::IEEEdouble,
8663 APInt(64, 1ULL << 63)));
8665 C = ConstantFP::get(*Context, APFloat(APFloat::IEEEsingle,
8666 APInt(32, 1U << 31)));
8667 C = ConstantVector::getSplat(NumElts, C);
8668 SDValue CPIdx = DAG.getConstantPool(C, getPointerTy());
8669 unsigned Alignment = cast<ConstantPoolSDNode>(CPIdx)->getAlignment();
8670 SDValue Mask = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
8671 MachinePointerInfo::getConstantPool(),
8672 false, false, false, Alignment);
8673 if (VT.isVector()) {
8674 MVT XORVT = VT.is128BitVector() ? MVT::v2i64 : MVT::v4i64;
8675 return DAG.getNode(ISD::BITCAST, dl, VT,
8676 DAG.getNode(ISD::XOR, dl, XORVT,
8677 DAG.getNode(ISD::BITCAST, dl, XORVT,
8679 DAG.getNode(ISD::BITCAST, dl, XORVT, Mask)));
8682 return DAG.getNode(X86ISD::FXOR, dl, VT, Op.getOperand(0), Mask);
8685 SDValue X86TargetLowering::LowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) const {
8686 LLVMContext *Context = DAG.getContext();
8687 SDValue Op0 = Op.getOperand(0);
8688 SDValue Op1 = Op.getOperand(1);
8689 DebugLoc dl = Op.getDebugLoc();
8690 MVT VT = Op.getValueType().getSimpleVT();
8691 MVT SrcVT = Op1.getValueType().getSimpleVT();
8693 // If second operand is smaller, extend it first.
8694 if (SrcVT.bitsLT(VT)) {
8695 Op1 = DAG.getNode(ISD::FP_EXTEND, dl, VT, Op1);
8698 // And if it is bigger, shrink it first.
8699 if (SrcVT.bitsGT(VT)) {
8700 Op1 = DAG.getNode(ISD::FP_ROUND, dl, VT, Op1, DAG.getIntPtrConstant(1));
8704 // At this point the operands and the result should have the same
8705 // type, and that won't be f80 since that is not custom lowered.
8707 // First get the sign bit of second operand.
8708 SmallVector<Constant*,4> CV;
8709 if (SrcVT == MVT::f64) {
8710 const fltSemantics &Sem = APFloat::IEEEdouble;
8711 CV.push_back(ConstantFP::get(*Context, APFloat(Sem, APInt(64, 1ULL << 63))));
8712 CV.push_back(ConstantFP::get(*Context, APFloat(Sem, APInt(64, 0))));
8714 const fltSemantics &Sem = APFloat::IEEEsingle;
8715 CV.push_back(ConstantFP::get(*Context, APFloat(Sem, APInt(32, 1U << 31))));
8716 CV.push_back(ConstantFP::get(*Context, APFloat(Sem, APInt(32, 0))));
8717 CV.push_back(ConstantFP::get(*Context, APFloat(Sem, APInt(32, 0))));
8718 CV.push_back(ConstantFP::get(*Context, APFloat(Sem, APInt(32, 0))));
8720 Constant *C = ConstantVector::get(CV);
8721 SDValue CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
8722 SDValue Mask1 = DAG.getLoad(SrcVT, dl, DAG.getEntryNode(), CPIdx,
8723 MachinePointerInfo::getConstantPool(),
8724 false, false, false, 16);
8725 SDValue SignBit = DAG.getNode(X86ISD::FAND, dl, SrcVT, Op1, Mask1);
8727 // Shift sign bit right or left if the two operands have different types.
8728 if (SrcVT.bitsGT(VT)) {
8729 // Op0 is MVT::f32, Op1 is MVT::f64.
8730 SignBit = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2f64, SignBit);
8731 SignBit = DAG.getNode(X86ISD::FSRL, dl, MVT::v2f64, SignBit,
8732 DAG.getConstant(32, MVT::i32));
8733 SignBit = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, SignBit);
8734 SignBit = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f32, SignBit,
8735 DAG.getIntPtrConstant(0));
8738 // Clear first operand sign bit.
8740 if (VT == MVT::f64) {
8741 const fltSemantics &Sem = APFloat::IEEEdouble;
8742 CV.push_back(ConstantFP::get(*Context, APFloat(Sem,
8743 APInt(64, ~(1ULL << 63)))));
8744 CV.push_back(ConstantFP::get(*Context, APFloat(Sem, APInt(64, 0))));
8746 const fltSemantics &Sem = APFloat::IEEEsingle;
8747 CV.push_back(ConstantFP::get(*Context, APFloat(Sem,
8748 APInt(32, ~(1U << 31)))));
8749 CV.push_back(ConstantFP::get(*Context, APFloat(Sem, APInt(32, 0))));
8750 CV.push_back(ConstantFP::get(*Context, APFloat(Sem, APInt(32, 0))));
8751 CV.push_back(ConstantFP::get(*Context, APFloat(Sem, APInt(32, 0))));
8753 C = ConstantVector::get(CV);
8754 CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
8755 SDValue Mask2 = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
8756 MachinePointerInfo::getConstantPool(),
8757 false, false, false, 16);
8758 SDValue Val = DAG.getNode(X86ISD::FAND, dl, VT, Op0, Mask2);
8760 // Or the value with the sign bit.
8761 return DAG.getNode(X86ISD::FOR, dl, VT, Val, SignBit);
8764 static SDValue LowerFGETSIGN(SDValue Op, SelectionDAG &DAG) {
8765 SDValue N0 = Op.getOperand(0);
8766 DebugLoc dl = Op.getDebugLoc();
8767 MVT VT = Op.getValueType().getSimpleVT();
8769 // Lower ISD::FGETSIGN to (AND (X86ISD::FGETSIGNx86 ...) 1).
8770 SDValue xFGETSIGN = DAG.getNode(X86ISD::FGETSIGNx86, dl, VT, N0,
8771 DAG.getConstant(1, VT));
8772 return DAG.getNode(ISD::AND, dl, VT, xFGETSIGN, DAG.getConstant(1, VT));
8775 // LowerVectorAllZeroTest - Check whether an OR'd tree is PTEST-able.
8777 SDValue X86TargetLowering::LowerVectorAllZeroTest(SDValue Op,
8778 SelectionDAG &DAG) const {
8779 assert(Op.getOpcode() == ISD::OR && "Only check OR'd tree.");
8781 if (!Subtarget->hasSSE41())
8784 if (!Op->hasOneUse())
8787 SDNode *N = Op.getNode();
8788 DebugLoc DL = N->getDebugLoc();
8790 SmallVector<SDValue, 8> Opnds;
8791 DenseMap<SDValue, unsigned> VecInMap;
8792 EVT VT = MVT::Other;
8794 // Recognize a special case where a vector is casted into wide integer to
8796 Opnds.push_back(N->getOperand(0));
8797 Opnds.push_back(N->getOperand(1));
8799 for (unsigned Slot = 0, e = Opnds.size(); Slot < e; ++Slot) {
8800 SmallVector<SDValue, 8>::const_iterator I = Opnds.begin() + Slot;
8801 // BFS traverse all OR'd operands.
8802 if (I->getOpcode() == ISD::OR) {
8803 Opnds.push_back(I->getOperand(0));
8804 Opnds.push_back(I->getOperand(1));
8805 // Re-evaluate the number of nodes to be traversed.
8806 e += 2; // 2 more nodes (LHS and RHS) are pushed.
8810 // Quit if a non-EXTRACT_VECTOR_ELT
8811 if (I->getOpcode() != ISD::EXTRACT_VECTOR_ELT)
8814 // Quit if without a constant index.
8815 SDValue Idx = I->getOperand(1);
8816 if (!isa<ConstantSDNode>(Idx))
8819 SDValue ExtractedFromVec = I->getOperand(0);
8820 DenseMap<SDValue, unsigned>::iterator M = VecInMap.find(ExtractedFromVec);
8821 if (M == VecInMap.end()) {
8822 VT = ExtractedFromVec.getValueType();
8823 // Quit if not 128/256-bit vector.
8824 if (!VT.is128BitVector() && !VT.is256BitVector())
8826 // Quit if not the same type.
8827 if (VecInMap.begin() != VecInMap.end() &&
8828 VT != VecInMap.begin()->first.getValueType())
8830 M = VecInMap.insert(std::make_pair(ExtractedFromVec, 0)).first;
8832 M->second |= 1U << cast<ConstantSDNode>(Idx)->getZExtValue();
8835 assert((VT.is128BitVector() || VT.is256BitVector()) &&
8836 "Not extracted from 128-/256-bit vector.");
8838 unsigned FullMask = (1U << VT.getVectorNumElements()) - 1U;
8839 SmallVector<SDValue, 8> VecIns;
8841 for (DenseMap<SDValue, unsigned>::const_iterator
8842 I = VecInMap.begin(), E = VecInMap.end(); I != E; ++I) {
8843 // Quit if not all elements are used.
8844 if (I->second != FullMask)
8846 VecIns.push_back(I->first);
8849 EVT TestVT = VT.is128BitVector() ? MVT::v2i64 : MVT::v4i64;
8851 // Cast all vectors into TestVT for PTEST.
8852 for (unsigned i = 0, e = VecIns.size(); i < e; ++i)
8853 VecIns[i] = DAG.getNode(ISD::BITCAST, DL, TestVT, VecIns[i]);
8855 // If more than one full vectors are evaluated, OR them first before PTEST.
8856 for (unsigned Slot = 0, e = VecIns.size(); e - Slot > 1; Slot += 2, e += 1) {
8857 // Each iteration will OR 2 nodes and append the result until there is only
8858 // 1 node left, i.e. the final OR'd value of all vectors.
8859 SDValue LHS = VecIns[Slot];
8860 SDValue RHS = VecIns[Slot + 1];
8861 VecIns.push_back(DAG.getNode(ISD::OR, DL, TestVT, LHS, RHS));
8864 return DAG.getNode(X86ISD::PTEST, DL, MVT::i32,
8865 VecIns.back(), VecIns.back());
8868 /// Emit nodes that will be selected as "test Op0,Op0", or something
8870 SDValue X86TargetLowering::EmitTest(SDValue Op, unsigned X86CC,
8871 SelectionDAG &DAG) const {
8872 DebugLoc dl = Op.getDebugLoc();
8874 // CF and OF aren't always set the way we want. Determine which
8875 // of these we need.
8876 bool NeedCF = false;
8877 bool NeedOF = false;
8880 case X86::COND_A: case X86::COND_AE:
8881 case X86::COND_B: case X86::COND_BE:
8884 case X86::COND_G: case X86::COND_GE:
8885 case X86::COND_L: case X86::COND_LE:
8886 case X86::COND_O: case X86::COND_NO:
8891 // See if we can use the EFLAGS value from the operand instead of
8892 // doing a separate TEST. TEST always sets OF and CF to 0, so unless
8893 // we prove that the arithmetic won't overflow, we can't use OF or CF.
8894 if (Op.getResNo() != 0 || NeedOF || NeedCF)
8895 // Emit a CMP with 0, which is the TEST pattern.
8896 return DAG.getNode(X86ISD::CMP, dl, MVT::i32, Op,
8897 DAG.getConstant(0, Op.getValueType()));
8899 unsigned Opcode = 0;
8900 unsigned NumOperands = 0;
8902 // Truncate operations may prevent the merge of the SETCC instruction
8903 // and the arithmetic intruction before it. Attempt to truncate the operands
8904 // of the arithmetic instruction and use a reduced bit-width instruction.
8905 bool NeedTruncation = false;
8906 SDValue ArithOp = Op;
8907 if (Op->getOpcode() == ISD::TRUNCATE && Op->hasOneUse()) {
8908 SDValue Arith = Op->getOperand(0);
8909 // Both the trunc and the arithmetic op need to have one user each.
8910 if (Arith->hasOneUse())
8911 switch (Arith.getOpcode()) {
8918 NeedTruncation = true;
8924 // NOTICE: In the code below we use ArithOp to hold the arithmetic operation
8925 // which may be the result of a CAST. We use the variable 'Op', which is the
8926 // non-casted variable when we check for possible users.
8927 switch (ArithOp.getOpcode()) {
8929 // Due to an isel shortcoming, be conservative if this add is likely to be
8930 // selected as part of a load-modify-store instruction. When the root node
8931 // in a match is a store, isel doesn't know how to remap non-chain non-flag
8932 // uses of other nodes in the match, such as the ADD in this case. This
8933 // leads to the ADD being left around and reselected, with the result being
8934 // two adds in the output. Alas, even if none our users are stores, that
8935 // doesn't prove we're O.K. Ergo, if we have any parents that aren't
8936 // CopyToReg or SETCC, eschew INC/DEC. A better fix seems to require
8937 // climbing the DAG back to the root, and it doesn't seem to be worth the
8939 for (SDNode::use_iterator UI = Op.getNode()->use_begin(),
8940 UE = Op.getNode()->use_end(); UI != UE; ++UI)
8941 if (UI->getOpcode() != ISD::CopyToReg &&
8942 UI->getOpcode() != ISD::SETCC &&
8943 UI->getOpcode() != ISD::STORE)
8946 if (ConstantSDNode *C =
8947 dyn_cast<ConstantSDNode>(ArithOp.getNode()->getOperand(1))) {
8948 // An add of one will be selected as an INC.
8949 if (C->getAPIntValue() == 1) {
8950 Opcode = X86ISD::INC;
8955 // An add of negative one (subtract of one) will be selected as a DEC.
8956 if (C->getAPIntValue().isAllOnesValue()) {
8957 Opcode = X86ISD::DEC;
8963 // Otherwise use a regular EFLAGS-setting add.
8964 Opcode = X86ISD::ADD;
8968 // If the primary and result isn't used, don't bother using X86ISD::AND,
8969 // because a TEST instruction will be better.
8970 bool NonFlagUse = false;
8971 for (SDNode::use_iterator UI = Op.getNode()->use_begin(),
8972 UE = Op.getNode()->use_end(); UI != UE; ++UI) {
8974 unsigned UOpNo = UI.getOperandNo();
8975 if (User->getOpcode() == ISD::TRUNCATE && User->hasOneUse()) {
8976 // Look pass truncate.
8977 UOpNo = User->use_begin().getOperandNo();
8978 User = *User->use_begin();
8981 if (User->getOpcode() != ISD::BRCOND &&
8982 User->getOpcode() != ISD::SETCC &&
8983 !(User->getOpcode() == ISD::SELECT && UOpNo == 0)) {
8996 // Due to the ISEL shortcoming noted above, be conservative if this op is
8997 // likely to be selected as part of a load-modify-store instruction.
8998 for (SDNode::use_iterator UI = Op.getNode()->use_begin(),
8999 UE = Op.getNode()->use_end(); UI != UE; ++UI)
9000 if (UI->getOpcode() == ISD::STORE)
9003 // Otherwise use a regular EFLAGS-setting instruction.
9004 switch (ArithOp.getOpcode()) {
9005 default: llvm_unreachable("unexpected operator!");
9006 case ISD::SUB: Opcode = X86ISD::SUB; break;
9007 case ISD::XOR: Opcode = X86ISD::XOR; break;
9008 case ISD::AND: Opcode = X86ISD::AND; break;
9010 if (!NeedTruncation && (X86CC == X86::COND_E || X86CC == X86::COND_NE)) {
9011 SDValue EFLAGS = LowerVectorAllZeroTest(Op, DAG);
9012 if (EFLAGS.getNode())
9015 Opcode = X86ISD::OR;
9029 return SDValue(Op.getNode(), 1);
9035 // If we found that truncation is beneficial, perform the truncation and
9037 if (NeedTruncation) {
9038 EVT VT = Op.getValueType();
9039 SDValue WideVal = Op->getOperand(0);
9040 EVT WideVT = WideVal.getValueType();
9041 unsigned ConvertedOp = 0;
9042 // Use a target machine opcode to prevent further DAGCombine
9043 // optimizations that may separate the arithmetic operations
9044 // from the setcc node.
9045 switch (WideVal.getOpcode()) {
9047 case ISD::ADD: ConvertedOp = X86ISD::ADD; break;
9048 case ISD::SUB: ConvertedOp = X86ISD::SUB; break;
9049 case ISD::AND: ConvertedOp = X86ISD::AND; break;
9050 case ISD::OR: ConvertedOp = X86ISD::OR; break;
9051 case ISD::XOR: ConvertedOp = X86ISD::XOR; break;
9055 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
9056 if (TLI.isOperationLegal(WideVal.getOpcode(), WideVT)) {
9057 SDValue V0 = DAG.getNode(ISD::TRUNCATE, dl, VT, WideVal.getOperand(0));
9058 SDValue V1 = DAG.getNode(ISD::TRUNCATE, dl, VT, WideVal.getOperand(1));
9059 Op = DAG.getNode(ConvertedOp, dl, VT, V0, V1);
9065 // Emit a CMP with 0, which is the TEST pattern.
9066 return DAG.getNode(X86ISD::CMP, dl, MVT::i32, Op,
9067 DAG.getConstant(0, Op.getValueType()));
9069 SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::i32);
9070 SmallVector<SDValue, 4> Ops;
9071 for (unsigned i = 0; i != NumOperands; ++i)
9072 Ops.push_back(Op.getOperand(i));
9074 SDValue New = DAG.getNode(Opcode, dl, VTs, &Ops[0], NumOperands);
9075 DAG.ReplaceAllUsesWith(Op, New);
9076 return SDValue(New.getNode(), 1);
9079 /// Emit nodes that will be selected as "cmp Op0,Op1", or something
9081 SDValue X86TargetLowering::EmitCmp(SDValue Op0, SDValue Op1, unsigned X86CC,
9082 SelectionDAG &DAG) const {
9083 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op1))
9084 if (C->getAPIntValue() == 0)
9085 return EmitTest(Op0, X86CC, DAG);
9087 DebugLoc dl = Op0.getDebugLoc();
9088 if ((Op0.getValueType() == MVT::i8 || Op0.getValueType() == MVT::i16 ||
9089 Op0.getValueType() == MVT::i32 || Op0.getValueType() == MVT::i64)) {
9090 // Use SUB instead of CMP to enable CSE between SUB and CMP.
9091 SDVTList VTs = DAG.getVTList(Op0.getValueType(), MVT::i32);
9092 SDValue Sub = DAG.getNode(X86ISD::SUB, dl, VTs,
9094 return SDValue(Sub.getNode(), 1);
9096 return DAG.getNode(X86ISD::CMP, dl, MVT::i32, Op0, Op1);
9099 /// Convert a comparison if required by the subtarget.
9100 SDValue X86TargetLowering::ConvertCmpIfNecessary(SDValue Cmp,
9101 SelectionDAG &DAG) const {
9102 // If the subtarget does not support the FUCOMI instruction, floating-point
9103 // comparisons have to be converted.
9104 if (Subtarget->hasCMov() ||
9105 Cmp.getOpcode() != X86ISD::CMP ||
9106 !Cmp.getOperand(0).getValueType().isFloatingPoint() ||
9107 !Cmp.getOperand(1).getValueType().isFloatingPoint())
9110 // The instruction selector will select an FUCOM instruction instead of
9111 // FUCOMI, which writes the comparison result to FPSW instead of EFLAGS. Hence
9112 // build an SDNode sequence that transfers the result from FPSW into EFLAGS:
9113 // (X86sahf (trunc (srl (X86fp_stsw (trunc (X86cmp ...)), 8))))
9114 DebugLoc dl = Cmp.getDebugLoc();
9115 SDValue TruncFPSW = DAG.getNode(ISD::TRUNCATE, dl, MVT::i16, Cmp);
9116 SDValue FNStSW = DAG.getNode(X86ISD::FNSTSW16r, dl, MVT::i16, TruncFPSW);
9117 SDValue Srl = DAG.getNode(ISD::SRL, dl, MVT::i16, FNStSW,
9118 DAG.getConstant(8, MVT::i8));
9119 SDValue TruncSrl = DAG.getNode(ISD::TRUNCATE, dl, MVT::i8, Srl);
9120 return DAG.getNode(X86ISD::SAHF, dl, MVT::i32, TruncSrl);
9123 static bool isAllOnes(SDValue V) {
9124 ConstantSDNode *C = dyn_cast<ConstantSDNode>(V);
9125 return C && C->isAllOnesValue();
9128 /// LowerToBT - Result of 'and' is compared against zero. Turn it into a BT node
9129 /// if it's possible.
9130 SDValue X86TargetLowering::LowerToBT(SDValue And, ISD::CondCode CC,
9131 DebugLoc dl, SelectionDAG &DAG) const {
9132 SDValue Op0 = And.getOperand(0);
9133 SDValue Op1 = And.getOperand(1);
9134 if (Op0.getOpcode() == ISD::TRUNCATE)
9135 Op0 = Op0.getOperand(0);
9136 if (Op1.getOpcode() == ISD::TRUNCATE)
9137 Op1 = Op1.getOperand(0);
9140 if (Op1.getOpcode() == ISD::SHL)
9141 std::swap(Op0, Op1);
9142 if (Op0.getOpcode() == ISD::SHL) {
9143 if (ConstantSDNode *And00C = dyn_cast<ConstantSDNode>(Op0.getOperand(0)))
9144 if (And00C->getZExtValue() == 1) {
9145 // If we looked past a truncate, check that it's only truncating away
9147 unsigned BitWidth = Op0.getValueSizeInBits();
9148 unsigned AndBitWidth = And.getValueSizeInBits();
9149 if (BitWidth > AndBitWidth) {
9151 DAG.ComputeMaskedBits(Op0, Zeros, Ones);
9152 if (Zeros.countLeadingOnes() < BitWidth - AndBitWidth)
9156 RHS = Op0.getOperand(1);
9158 } else if (Op1.getOpcode() == ISD::Constant) {
9159 ConstantSDNode *AndRHS = cast<ConstantSDNode>(Op1);
9160 uint64_t AndRHSVal = AndRHS->getZExtValue();
9161 SDValue AndLHS = Op0;
9163 if (AndRHSVal == 1 && AndLHS.getOpcode() == ISD::SRL) {
9164 LHS = AndLHS.getOperand(0);
9165 RHS = AndLHS.getOperand(1);
9168 // Use BT if the immediate can't be encoded in a TEST instruction.
9169 if (!isUInt<32>(AndRHSVal) && isPowerOf2_64(AndRHSVal)) {
9171 RHS = DAG.getConstant(Log2_64_Ceil(AndRHSVal), LHS.getValueType());
9175 if (LHS.getNode()) {
9176 // If the LHS is of the form (x ^ -1) then replace the LHS with x and flip
9177 // the condition code later.
9178 bool Invert = false;
9179 if (LHS.getOpcode() == ISD::XOR && isAllOnes(LHS.getOperand(1))) {
9181 LHS = LHS.getOperand(0);
9184 // If LHS is i8, promote it to i32 with any_extend. There is no i8 BT
9185 // instruction. Since the shift amount is in-range-or-undefined, we know
9186 // that doing a bittest on the i32 value is ok. We extend to i32 because
9187 // the encoding for the i16 version is larger than the i32 version.
9188 // Also promote i16 to i32 for performance / code size reason.
9189 if (LHS.getValueType() == MVT::i8 ||
9190 LHS.getValueType() == MVT::i16)
9191 LHS = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, LHS);
9193 // If the operand types disagree, extend the shift amount to match. Since
9194 // BT ignores high bits (like shifts) we can use anyextend.
9195 if (LHS.getValueType() != RHS.getValueType())
9196 RHS = DAG.getNode(ISD::ANY_EXTEND, dl, LHS.getValueType(), RHS);
9198 SDValue BT = DAG.getNode(X86ISD::BT, dl, MVT::i32, LHS, RHS);
9199 X86::CondCode Cond = CC == ISD::SETEQ ? X86::COND_AE : X86::COND_B;
9200 // Flip the condition if the LHS was a not instruction
9202 Cond = X86::GetOppositeBranchCondition(Cond);
9203 return DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
9204 DAG.getConstant(Cond, MVT::i8), BT);
9210 // Lower256IntVSETCC - Break a VSETCC 256-bit integer VSETCC into two new 128
9211 // ones, and then concatenate the result back.
9212 static SDValue Lower256IntVSETCC(SDValue Op, SelectionDAG &DAG) {
9213 MVT VT = Op.getValueType().getSimpleVT();
9215 assert(VT.is256BitVector() && Op.getOpcode() == ISD::SETCC &&
9216 "Unsupported value type for operation");
9218 unsigned NumElems = VT.getVectorNumElements();
9219 DebugLoc dl = Op.getDebugLoc();
9220 SDValue CC = Op.getOperand(2);
9222 // Extract the LHS vectors
9223 SDValue LHS = Op.getOperand(0);
9224 SDValue LHS1 = Extract128BitVector(LHS, 0, DAG, dl);
9225 SDValue LHS2 = Extract128BitVector(LHS, NumElems/2, DAG, dl);
9227 // Extract the RHS vectors
9228 SDValue RHS = Op.getOperand(1);
9229 SDValue RHS1 = Extract128BitVector(RHS, 0, DAG, dl);
9230 SDValue RHS2 = Extract128BitVector(RHS, NumElems/2, DAG, dl);
9232 // Issue the operation on the smaller types and concatenate the result back
9233 MVT EltVT = VT.getVectorElementType();
9234 MVT NewVT = MVT::getVectorVT(EltVT, NumElems/2);
9235 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT,
9236 DAG.getNode(Op.getOpcode(), dl, NewVT, LHS1, RHS1, CC),
9237 DAG.getNode(Op.getOpcode(), dl, NewVT, LHS2, RHS2, CC));
9240 static SDValue LowerVSETCC(SDValue Op, const X86Subtarget *Subtarget,
9241 SelectionDAG &DAG) {
9243 SDValue Op0 = Op.getOperand(0);
9244 SDValue Op1 = Op.getOperand(1);
9245 SDValue CC = Op.getOperand(2);
9246 MVT VT = Op.getValueType().getSimpleVT();
9247 ISD::CondCode SetCCOpcode = cast<CondCodeSDNode>(CC)->get();
9248 bool isFP = Op.getOperand(1).getValueType().getSimpleVT().isFloatingPoint();
9249 DebugLoc dl = Op.getDebugLoc();
9253 MVT EltVT = Op0.getValueType().getVectorElementType().getSimpleVT();
9254 assert(EltVT == MVT::f32 || EltVT == MVT::f64);
9260 // SSE Condition code mapping:
9269 switch (SetCCOpcode) {
9270 default: llvm_unreachable("Unexpected SETCC condition");
9272 case ISD::SETEQ: SSECC = 0; break;
9274 case ISD::SETGT: Swap = true; // Fallthrough
9276 case ISD::SETOLT: SSECC = 1; break;
9278 case ISD::SETGE: Swap = true; // Fallthrough
9280 case ISD::SETOLE: SSECC = 2; break;
9281 case ISD::SETUO: SSECC = 3; break;
9283 case ISD::SETNE: SSECC = 4; break;
9284 case ISD::SETULE: Swap = true; // Fallthrough
9285 case ISD::SETUGE: SSECC = 5; break;
9286 case ISD::SETULT: Swap = true; // Fallthrough
9287 case ISD::SETUGT: SSECC = 6; break;
9288 case ISD::SETO: SSECC = 7; break;
9290 case ISD::SETONE: SSECC = 8; break;
9293 std::swap(Op0, Op1);
9295 // In the two special cases we can't handle, emit two comparisons.
9298 unsigned CombineOpc;
9299 if (SetCCOpcode == ISD::SETUEQ) {
9300 CC0 = 3; CC1 = 0; CombineOpc = ISD::OR;
9302 assert(SetCCOpcode == ISD::SETONE);
9303 CC0 = 7; CC1 = 4; CombineOpc = ISD::AND;
9306 SDValue Cmp0 = DAG.getNode(X86ISD::CMPP, dl, VT, Op0, Op1,
9307 DAG.getConstant(CC0, MVT::i8));
9308 SDValue Cmp1 = DAG.getNode(X86ISD::CMPP, dl, VT, Op0, Op1,
9309 DAG.getConstant(CC1, MVT::i8));
9310 return DAG.getNode(CombineOpc, dl, VT, Cmp0, Cmp1);
9312 // Handle all other FP comparisons here.
9313 return DAG.getNode(X86ISD::CMPP, dl, VT, Op0, Op1,
9314 DAG.getConstant(SSECC, MVT::i8));
9317 // Break 256-bit integer vector compare into smaller ones.
9318 if (VT.is256BitVector() && !Subtarget->hasInt256())
9319 return Lower256IntVSETCC(Op, DAG);
9321 // We are handling one of the integer comparisons here. Since SSE only has
9322 // GT and EQ comparisons for integer, swapping operands and multiple
9323 // operations may be required for some comparisons.
9325 bool Swap = false, Invert = false, FlipSigns = false;
9327 switch (SetCCOpcode) {
9328 default: llvm_unreachable("Unexpected SETCC condition");
9329 case ISD::SETNE: Invert = true;
9330 case ISD::SETEQ: Opc = X86ISD::PCMPEQ; break;
9331 case ISD::SETLT: Swap = true;
9332 case ISD::SETGT: Opc = X86ISD::PCMPGT; break;
9333 case ISD::SETGE: Swap = true;
9334 case ISD::SETLE: Opc = X86ISD::PCMPGT; Invert = true; break;
9335 case ISD::SETULT: Swap = true;
9336 case ISD::SETUGT: Opc = X86ISD::PCMPGT; FlipSigns = true; break;
9337 case ISD::SETUGE: Swap = true;
9338 case ISD::SETULE: Opc = X86ISD::PCMPGT; FlipSigns = true; Invert = true; break;
9341 std::swap(Op0, Op1);
9343 // Check that the operation in question is available (most are plain SSE2,
9344 // but PCMPGTQ and PCMPEQQ have different requirements).
9345 if (VT == MVT::v2i64) {
9346 if (Opc == X86ISD::PCMPGT && !Subtarget->hasSSE42())
9348 if (Opc == X86ISD::PCMPEQ && !Subtarget->hasSSE41()) {
9349 // If pcmpeqq is missing but pcmpeqd is available synthesize pcmpeqq with
9350 // pcmpeqd + pshufd + pand.
9351 assert(Subtarget->hasSSE2() && !FlipSigns && "Don't know how to lower!");
9353 // First cast everything to the right type,
9354 Op0 = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, Op0);
9355 Op1 = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, Op1);
9358 SDValue Result = DAG.getNode(Opc, dl, MVT::v4i32, Op0, Op1);
9360 // Make sure the lower and upper halves are both all-ones.
9361 const int Mask[] = { 1, 0, 3, 2 };
9362 SDValue Shuf = DAG.getVectorShuffle(MVT::v4i32, dl, Result, Result, Mask);
9363 Result = DAG.getNode(ISD::AND, dl, MVT::v4i32, Result, Shuf);
9366 Result = DAG.getNOT(dl, Result, MVT::v4i32);
9368 return DAG.getNode(ISD::BITCAST, dl, VT, Result);
9372 // Since SSE has no unsigned integer comparisons, we need to flip the sign
9373 // bits of the inputs before performing those operations.
9375 EVT EltVT = VT.getVectorElementType();
9376 SDValue SignBit = DAG.getConstant(APInt::getSignBit(EltVT.getSizeInBits()),
9378 std::vector<SDValue> SignBits(VT.getVectorNumElements(), SignBit);
9379 SDValue SignVec = DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &SignBits[0],
9381 Op0 = DAG.getNode(ISD::XOR, dl, VT, Op0, SignVec);
9382 Op1 = DAG.getNode(ISD::XOR, dl, VT, Op1, SignVec);
9385 SDValue Result = DAG.getNode(Opc, dl, VT, Op0, Op1);
9387 // If the logical-not of the result is required, perform that now.
9389 Result = DAG.getNOT(dl, Result, VT);
9394 SDValue X86TargetLowering::LowerSETCC(SDValue Op, SelectionDAG &DAG) const {
9396 MVT VT = Op.getValueType().getSimpleVT();
9398 if (VT.isVector()) return LowerVSETCC(Op, Subtarget, DAG);
9400 assert(VT == MVT::i8 && "SetCC type must be 8-bit integer");
9401 SDValue Op0 = Op.getOperand(0);
9402 SDValue Op1 = Op.getOperand(1);
9403 DebugLoc dl = Op.getDebugLoc();
9404 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(2))->get();
9406 // Optimize to BT if possible.
9407 // Lower (X & (1 << N)) == 0 to BT(X, N).
9408 // Lower ((X >>u N) & 1) != 0 to BT(X, N).
9409 // Lower ((X >>s N) & 1) != 0 to BT(X, N).
9410 if (Op0.getOpcode() == ISD::AND && Op0.hasOneUse() &&
9411 Op1.getOpcode() == ISD::Constant &&
9412 cast<ConstantSDNode>(Op1)->isNullValue() &&
9413 (CC == ISD::SETEQ || CC == ISD::SETNE)) {
9414 SDValue NewSetCC = LowerToBT(Op0, CC, dl, DAG);
9415 if (NewSetCC.getNode())
9419 // Look for X == 0, X == 1, X != 0, or X != 1. We can simplify some forms of
9421 if (Op1.getOpcode() == ISD::Constant &&
9422 (cast<ConstantSDNode>(Op1)->getZExtValue() == 1 ||
9423 cast<ConstantSDNode>(Op1)->isNullValue()) &&
9424 (CC == ISD::SETEQ || CC == ISD::SETNE)) {
9426 // If the input is a setcc, then reuse the input setcc or use a new one with
9427 // the inverted condition.
9428 if (Op0.getOpcode() == X86ISD::SETCC) {
9429 X86::CondCode CCode = (X86::CondCode)Op0.getConstantOperandVal(0);
9430 bool Invert = (CC == ISD::SETNE) ^
9431 cast<ConstantSDNode>(Op1)->isNullValue();
9432 if (!Invert) return Op0;
9434 CCode = X86::GetOppositeBranchCondition(CCode);
9435 return DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
9436 DAG.getConstant(CCode, MVT::i8), Op0.getOperand(1));
9440 bool isFP = Op1.getValueType().getSimpleVT().isFloatingPoint();
9441 unsigned X86CC = TranslateX86CC(CC, isFP, Op0, Op1, DAG);
9442 if (X86CC == X86::COND_INVALID)
9445 SDValue EFLAGS = EmitCmp(Op0, Op1, X86CC, DAG);
9446 EFLAGS = ConvertCmpIfNecessary(EFLAGS, DAG);
9447 return DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
9448 DAG.getConstant(X86CC, MVT::i8), EFLAGS);
9451 // isX86LogicalCmp - Return true if opcode is a X86 logical comparison.
9452 static bool isX86LogicalCmp(SDValue Op) {
9453 unsigned Opc = Op.getNode()->getOpcode();
9454 if (Opc == X86ISD::CMP || Opc == X86ISD::COMI || Opc == X86ISD::UCOMI ||
9455 Opc == X86ISD::SAHF)
9457 if (Op.getResNo() == 1 &&
9458 (Opc == X86ISD::ADD ||
9459 Opc == X86ISD::SUB ||
9460 Opc == X86ISD::ADC ||
9461 Opc == X86ISD::SBB ||
9462 Opc == X86ISD::SMUL ||
9463 Opc == X86ISD::UMUL ||
9464 Opc == X86ISD::INC ||
9465 Opc == X86ISD::DEC ||
9466 Opc == X86ISD::OR ||
9467 Opc == X86ISD::XOR ||
9468 Opc == X86ISD::AND))
9471 if (Op.getResNo() == 2 && Opc == X86ISD::UMUL)
9477 static bool isZero(SDValue V) {
9478 ConstantSDNode *C = dyn_cast<ConstantSDNode>(V);
9479 return C && C->isNullValue();
9482 static bool isTruncWithZeroHighBitsInput(SDValue V, SelectionDAG &DAG) {
9483 if (V.getOpcode() != ISD::TRUNCATE)
9486 SDValue VOp0 = V.getOperand(0);
9487 unsigned InBits = VOp0.getValueSizeInBits();
9488 unsigned Bits = V.getValueSizeInBits();
9489 return DAG.MaskedValueIsZero(VOp0, APInt::getHighBitsSet(InBits,InBits-Bits));
9492 SDValue X86TargetLowering::LowerSELECT(SDValue Op, SelectionDAG &DAG) const {
9493 bool addTest = true;
9494 SDValue Cond = Op.getOperand(0);
9495 SDValue Op1 = Op.getOperand(1);
9496 SDValue Op2 = Op.getOperand(2);
9497 DebugLoc DL = Op.getDebugLoc();
9500 if (Cond.getOpcode() == ISD::SETCC) {
9501 SDValue NewCond = LowerSETCC(Cond, DAG);
9502 if (NewCond.getNode())
9506 // (select (x == 0), -1, y) -> (sign_bit (x - 1)) | y
9507 // (select (x == 0), y, -1) -> ~(sign_bit (x - 1)) | y
9508 // (select (x != 0), y, -1) -> (sign_bit (x - 1)) | y
9509 // (select (x != 0), -1, y) -> ~(sign_bit (x - 1)) | y
9510 if (Cond.getOpcode() == X86ISD::SETCC &&
9511 Cond.getOperand(1).getOpcode() == X86ISD::CMP &&
9512 isZero(Cond.getOperand(1).getOperand(1))) {
9513 SDValue Cmp = Cond.getOperand(1);
9515 unsigned CondCode =cast<ConstantSDNode>(Cond.getOperand(0))->getZExtValue();
9517 if ((isAllOnes(Op1) || isAllOnes(Op2)) &&
9518 (CondCode == X86::COND_E || CondCode == X86::COND_NE)) {
9519 SDValue Y = isAllOnes(Op2) ? Op1 : Op2;
9521 SDValue CmpOp0 = Cmp.getOperand(0);
9522 // Apply further optimizations for special cases
9523 // (select (x != 0), -1, 0) -> neg & sbb
9524 // (select (x == 0), 0, -1) -> neg & sbb
9525 if (ConstantSDNode *YC = dyn_cast<ConstantSDNode>(Y))
9526 if (YC->isNullValue() &&
9527 (isAllOnes(Op1) == (CondCode == X86::COND_NE))) {
9528 SDVTList VTs = DAG.getVTList(CmpOp0.getValueType(), MVT::i32);
9529 SDValue Neg = DAG.getNode(X86ISD::SUB, DL, VTs,
9530 DAG.getConstant(0, CmpOp0.getValueType()),
9532 SDValue Res = DAG.getNode(X86ISD::SETCC_CARRY, DL, Op.getValueType(),
9533 DAG.getConstant(X86::COND_B, MVT::i8),
9534 SDValue(Neg.getNode(), 1));
9538 Cmp = DAG.getNode(X86ISD::CMP, DL, MVT::i32,
9539 CmpOp0, DAG.getConstant(1, CmpOp0.getValueType()));
9540 Cmp = ConvertCmpIfNecessary(Cmp, DAG);
9542 SDValue Res = // Res = 0 or -1.
9543 DAG.getNode(X86ISD::SETCC_CARRY, DL, Op.getValueType(),
9544 DAG.getConstant(X86::COND_B, MVT::i8), Cmp);
9546 if (isAllOnes(Op1) != (CondCode == X86::COND_E))
9547 Res = DAG.getNOT(DL, Res, Res.getValueType());
9549 ConstantSDNode *N2C = dyn_cast<ConstantSDNode>(Op2);
9550 if (N2C == 0 || !N2C->isNullValue())
9551 Res = DAG.getNode(ISD::OR, DL, Res.getValueType(), Res, Y);
9556 // Look past (and (setcc_carry (cmp ...)), 1).
9557 if (Cond.getOpcode() == ISD::AND &&
9558 Cond.getOperand(0).getOpcode() == X86ISD::SETCC_CARRY) {
9559 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Cond.getOperand(1));
9560 if (C && C->getAPIntValue() == 1)
9561 Cond = Cond.getOperand(0);
9564 // If condition flag is set by a X86ISD::CMP, then use it as the condition
9565 // setting operand in place of the X86ISD::SETCC.
9566 unsigned CondOpcode = Cond.getOpcode();
9567 if (CondOpcode == X86ISD::SETCC ||
9568 CondOpcode == X86ISD::SETCC_CARRY) {
9569 CC = Cond.getOperand(0);
9571 SDValue Cmp = Cond.getOperand(1);
9572 unsigned Opc = Cmp.getOpcode();
9573 MVT VT = Op.getValueType().getSimpleVT();
9575 bool IllegalFPCMov = false;
9576 if (VT.isFloatingPoint() && !VT.isVector() &&
9577 !isScalarFPTypeInSSEReg(VT)) // FPStack?
9578 IllegalFPCMov = !hasFPCMov(cast<ConstantSDNode>(CC)->getSExtValue());
9580 if ((isX86LogicalCmp(Cmp) && !IllegalFPCMov) ||
9581 Opc == X86ISD::BT) { // FIXME
9585 } else if (CondOpcode == ISD::USUBO || CondOpcode == ISD::SSUBO ||
9586 CondOpcode == ISD::UADDO || CondOpcode == ISD::SADDO ||
9587 ((CondOpcode == ISD::UMULO || CondOpcode == ISD::SMULO) &&
9588 Cond.getOperand(0).getValueType() != MVT::i8)) {
9589 SDValue LHS = Cond.getOperand(0);
9590 SDValue RHS = Cond.getOperand(1);
9594 switch (CondOpcode) {
9595 case ISD::UADDO: X86Opcode = X86ISD::ADD; X86Cond = X86::COND_B; break;
9596 case ISD::SADDO: X86Opcode = X86ISD::ADD; X86Cond = X86::COND_O; break;
9597 case ISD::USUBO: X86Opcode = X86ISD::SUB; X86Cond = X86::COND_B; break;
9598 case ISD::SSUBO: X86Opcode = X86ISD::SUB; X86Cond = X86::COND_O; break;
9599 case ISD::UMULO: X86Opcode = X86ISD::UMUL; X86Cond = X86::COND_O; break;
9600 case ISD::SMULO: X86Opcode = X86ISD::SMUL; X86Cond = X86::COND_O; break;
9601 default: llvm_unreachable("unexpected overflowing operator");
9603 if (CondOpcode == ISD::UMULO)
9604 VTs = DAG.getVTList(LHS.getValueType(), LHS.getValueType(),
9607 VTs = DAG.getVTList(LHS.getValueType(), MVT::i32);
9609 SDValue X86Op = DAG.getNode(X86Opcode, DL, VTs, LHS, RHS);
9611 if (CondOpcode == ISD::UMULO)
9612 Cond = X86Op.getValue(2);
9614 Cond = X86Op.getValue(1);
9616 CC = DAG.getConstant(X86Cond, MVT::i8);
9621 // Look pass the truncate if the high bits are known zero.
9622 if (isTruncWithZeroHighBitsInput(Cond, DAG))
9623 Cond = Cond.getOperand(0);
9625 // We know the result of AND is compared against zero. Try to match
9627 if (Cond.getOpcode() == ISD::AND && Cond.hasOneUse()) {
9628 SDValue NewSetCC = LowerToBT(Cond, ISD::SETNE, DL, DAG);
9629 if (NewSetCC.getNode()) {
9630 CC = NewSetCC.getOperand(0);
9631 Cond = NewSetCC.getOperand(1);
9638 CC = DAG.getConstant(X86::COND_NE, MVT::i8);
9639 Cond = EmitTest(Cond, X86::COND_NE, DAG);
9642 // a < b ? -1 : 0 -> RES = ~setcc_carry
9643 // a < b ? 0 : -1 -> RES = setcc_carry
9644 // a >= b ? -1 : 0 -> RES = setcc_carry
9645 // a >= b ? 0 : -1 -> RES = ~setcc_carry
9646 if (Cond.getOpcode() == X86ISD::SUB) {
9647 Cond = ConvertCmpIfNecessary(Cond, DAG);
9648 unsigned CondCode = cast<ConstantSDNode>(CC)->getZExtValue();
9650 if ((CondCode == X86::COND_AE || CondCode == X86::COND_B) &&
9651 (isAllOnes(Op1) || isAllOnes(Op2)) && (isZero(Op1) || isZero(Op2))) {
9652 SDValue Res = DAG.getNode(X86ISD::SETCC_CARRY, DL, Op.getValueType(),
9653 DAG.getConstant(X86::COND_B, MVT::i8), Cond);
9654 if (isAllOnes(Op1) != (CondCode == X86::COND_B))
9655 return DAG.getNOT(DL, Res, Res.getValueType());
9660 // X86 doesn't have an i8 cmov. If both operands are the result of a truncate
9661 // widen the cmov and push the truncate through. This avoids introducing a new
9662 // branch during isel and doesn't add any extensions.
9663 if (Op.getValueType() == MVT::i8 &&
9664 Op1.getOpcode() == ISD::TRUNCATE && Op2.getOpcode() == ISD::TRUNCATE) {
9665 SDValue T1 = Op1.getOperand(0), T2 = Op2.getOperand(0);
9666 if (T1.getValueType() == T2.getValueType() &&
9667 // Blacklist CopyFromReg to avoid partial register stalls.
9668 T1.getOpcode() != ISD::CopyFromReg && T2.getOpcode()!=ISD::CopyFromReg){
9669 SDVTList VTs = DAG.getVTList(T1.getValueType(), MVT::Glue);
9670 SDValue Cmov = DAG.getNode(X86ISD::CMOV, DL, VTs, T2, T1, CC, Cond);
9671 return DAG.getNode(ISD::TRUNCATE, DL, Op.getValueType(), Cmov);
9675 // X86ISD::CMOV means set the result (which is operand 1) to the RHS if
9676 // condition is true.
9677 SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::Glue);
9678 SDValue Ops[] = { Op2, Op1, CC, Cond };
9679 return DAG.getNode(X86ISD::CMOV, DL, VTs, Ops, array_lengthof(Ops));
9682 SDValue X86TargetLowering::LowerSIGN_EXTEND(SDValue Op,
9683 SelectionDAG &DAG) const {
9684 MVT VT = Op->getValueType(0).getSimpleVT();
9685 SDValue In = Op->getOperand(0);
9686 MVT InVT = In.getValueType().getSimpleVT();
9687 DebugLoc dl = Op->getDebugLoc();
9689 if ((VT != MVT::v4i64 || InVT != MVT::v4i32) &&
9690 (VT != MVT::v8i32 || InVT != MVT::v8i16))
9693 if (Subtarget->hasInt256())
9694 return DAG.getNode(X86ISD::VSEXT_MOVL, dl, VT, In);
9696 // Optimize vectors in AVX mode
9697 // Sign extend v8i16 to v8i32 and
9700 // Divide input vector into two parts
9701 // for v4i32 the shuffle mask will be { 0, 1, -1, -1} {2, 3, -1, -1}
9702 // use vpmovsx instruction to extend v4i32 -> v2i64; v8i16 -> v4i32
9703 // concat the vectors to original VT
9705 unsigned NumElems = InVT.getVectorNumElements();
9706 SDValue Undef = DAG.getUNDEF(InVT);
9708 SmallVector<int,8> ShufMask1(NumElems, -1);
9709 for (unsigned i = 0; i != NumElems/2; ++i)
9712 SDValue OpLo = DAG.getVectorShuffle(InVT, dl, In, Undef, &ShufMask1[0]);
9714 SmallVector<int,8> ShufMask2(NumElems, -1);
9715 for (unsigned i = 0; i != NumElems/2; ++i)
9716 ShufMask2[i] = i + NumElems/2;
9718 SDValue OpHi = DAG.getVectorShuffle(InVT, dl, In, Undef, &ShufMask2[0]);
9720 MVT HalfVT = MVT::getVectorVT(VT.getScalarType(),
9721 VT.getVectorNumElements()/2);
9723 OpLo = DAG.getNode(X86ISD::VSEXT_MOVL, dl, HalfVT, OpLo);
9724 OpHi = DAG.getNode(X86ISD::VSEXT_MOVL, dl, HalfVT, OpHi);
9726 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, OpLo, OpHi);
9729 // isAndOrOfSingleUseSetCCs - Return true if node is an ISD::AND or
9730 // ISD::OR of two X86ISD::SETCC nodes each of which has no other use apart
9731 // from the AND / OR.
9732 static bool isAndOrOfSetCCs(SDValue Op, unsigned &Opc) {
9733 Opc = Op.getOpcode();
9734 if (Opc != ISD::OR && Opc != ISD::AND)
9736 return (Op.getOperand(0).getOpcode() == X86ISD::SETCC &&
9737 Op.getOperand(0).hasOneUse() &&
9738 Op.getOperand(1).getOpcode() == X86ISD::SETCC &&
9739 Op.getOperand(1).hasOneUse());
9742 // isXor1OfSetCC - Return true if node is an ISD::XOR of a X86ISD::SETCC and
9743 // 1 and that the SETCC node has a single use.
9744 static bool isXor1OfSetCC(SDValue Op) {
9745 if (Op.getOpcode() != ISD::XOR)
9747 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(Op.getOperand(1));
9748 if (N1C && N1C->getAPIntValue() == 1) {
9749 return Op.getOperand(0).getOpcode() == X86ISD::SETCC &&
9750 Op.getOperand(0).hasOneUse();
9755 SDValue X86TargetLowering::LowerBRCOND(SDValue Op, SelectionDAG &DAG) const {
9756 bool addTest = true;
9757 SDValue Chain = Op.getOperand(0);
9758 SDValue Cond = Op.getOperand(1);
9759 SDValue Dest = Op.getOperand(2);
9760 DebugLoc dl = Op.getDebugLoc();
9762 bool Inverted = false;
9764 if (Cond.getOpcode() == ISD::SETCC) {
9765 // Check for setcc([su]{add,sub,mul}o == 0).
9766 if (cast<CondCodeSDNode>(Cond.getOperand(2))->get() == ISD::SETEQ &&
9767 isa<ConstantSDNode>(Cond.getOperand(1)) &&
9768 cast<ConstantSDNode>(Cond.getOperand(1))->isNullValue() &&
9769 Cond.getOperand(0).getResNo() == 1 &&
9770 (Cond.getOperand(0).getOpcode() == ISD::SADDO ||
9771 Cond.getOperand(0).getOpcode() == ISD::UADDO ||
9772 Cond.getOperand(0).getOpcode() == ISD::SSUBO ||
9773 Cond.getOperand(0).getOpcode() == ISD::USUBO ||
9774 Cond.getOperand(0).getOpcode() == ISD::SMULO ||
9775 Cond.getOperand(0).getOpcode() == ISD::UMULO)) {
9777 Cond = Cond.getOperand(0);
9779 SDValue NewCond = LowerSETCC(Cond, DAG);
9780 if (NewCond.getNode())
9785 // FIXME: LowerXALUO doesn't handle these!!
9786 else if (Cond.getOpcode() == X86ISD::ADD ||
9787 Cond.getOpcode() == X86ISD::SUB ||
9788 Cond.getOpcode() == X86ISD::SMUL ||
9789 Cond.getOpcode() == X86ISD::UMUL)
9790 Cond = LowerXALUO(Cond, DAG);
9793 // Look pass (and (setcc_carry (cmp ...)), 1).
9794 if (Cond.getOpcode() == ISD::AND &&
9795 Cond.getOperand(0).getOpcode() == X86ISD::SETCC_CARRY) {
9796 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Cond.getOperand(1));
9797 if (C && C->getAPIntValue() == 1)
9798 Cond = Cond.getOperand(0);
9801 // If condition flag is set by a X86ISD::CMP, then use it as the condition
9802 // setting operand in place of the X86ISD::SETCC.
9803 unsigned CondOpcode = Cond.getOpcode();
9804 if (CondOpcode == X86ISD::SETCC ||
9805 CondOpcode == X86ISD::SETCC_CARRY) {
9806 CC = Cond.getOperand(0);
9808 SDValue Cmp = Cond.getOperand(1);
9809 unsigned Opc = Cmp.getOpcode();
9810 // FIXME: WHY THE SPECIAL CASING OF LogicalCmp??
9811 if (isX86LogicalCmp(Cmp) || Opc == X86ISD::BT) {
9815 switch (cast<ConstantSDNode>(CC)->getZExtValue()) {
9819 // These can only come from an arithmetic instruction with overflow,
9820 // e.g. SADDO, UADDO.
9821 Cond = Cond.getNode()->getOperand(1);
9827 CondOpcode = Cond.getOpcode();
9828 if (CondOpcode == ISD::UADDO || CondOpcode == ISD::SADDO ||
9829 CondOpcode == ISD::USUBO || CondOpcode == ISD::SSUBO ||
9830 ((CondOpcode == ISD::UMULO || CondOpcode == ISD::SMULO) &&
9831 Cond.getOperand(0).getValueType() != MVT::i8)) {
9832 SDValue LHS = Cond.getOperand(0);
9833 SDValue RHS = Cond.getOperand(1);
9837 switch (CondOpcode) {
9838 case ISD::UADDO: X86Opcode = X86ISD::ADD; X86Cond = X86::COND_B; break;
9839 case ISD::SADDO: X86Opcode = X86ISD::ADD; X86Cond = X86::COND_O; break;
9840 case ISD::USUBO: X86Opcode = X86ISD::SUB; X86Cond = X86::COND_B; break;
9841 case ISD::SSUBO: X86Opcode = X86ISD::SUB; X86Cond = X86::COND_O; break;
9842 case ISD::UMULO: X86Opcode = X86ISD::UMUL; X86Cond = X86::COND_O; break;
9843 case ISD::SMULO: X86Opcode = X86ISD::SMUL; X86Cond = X86::COND_O; break;
9844 default: llvm_unreachable("unexpected overflowing operator");
9847 X86Cond = X86::GetOppositeBranchCondition((X86::CondCode)X86Cond);
9848 if (CondOpcode == ISD::UMULO)
9849 VTs = DAG.getVTList(LHS.getValueType(), LHS.getValueType(),
9852 VTs = DAG.getVTList(LHS.getValueType(), MVT::i32);
9854 SDValue X86Op = DAG.getNode(X86Opcode, dl, VTs, LHS, RHS);
9856 if (CondOpcode == ISD::UMULO)
9857 Cond = X86Op.getValue(2);
9859 Cond = X86Op.getValue(1);
9861 CC = DAG.getConstant(X86Cond, MVT::i8);
9865 if (Cond.hasOneUse() && isAndOrOfSetCCs(Cond, CondOpc)) {
9866 SDValue Cmp = Cond.getOperand(0).getOperand(1);
9867 if (CondOpc == ISD::OR) {
9868 // Also, recognize the pattern generated by an FCMP_UNE. We can emit
9869 // two branches instead of an explicit OR instruction with a
9871 if (Cmp == Cond.getOperand(1).getOperand(1) &&
9872 isX86LogicalCmp(Cmp)) {
9873 CC = Cond.getOperand(0).getOperand(0);
9874 Chain = DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
9875 Chain, Dest, CC, Cmp);
9876 CC = Cond.getOperand(1).getOperand(0);
9880 } else { // ISD::AND
9881 // Also, recognize the pattern generated by an FCMP_OEQ. We can emit
9882 // two branches instead of an explicit AND instruction with a
9883 // separate test. However, we only do this if this block doesn't
9884 // have a fall-through edge, because this requires an explicit
9885 // jmp when the condition is false.
9886 if (Cmp == Cond.getOperand(1).getOperand(1) &&
9887 isX86LogicalCmp(Cmp) &&
9888 Op.getNode()->hasOneUse()) {
9889 X86::CondCode CCode =
9890 (X86::CondCode)Cond.getOperand(0).getConstantOperandVal(0);
9891 CCode = X86::GetOppositeBranchCondition(CCode);
9892 CC = DAG.getConstant(CCode, MVT::i8);
9893 SDNode *User = *Op.getNode()->use_begin();
9894 // Look for an unconditional branch following this conditional branch.
9895 // We need this because we need to reverse the successors in order
9896 // to implement FCMP_OEQ.
9897 if (User->getOpcode() == ISD::BR) {
9898 SDValue FalseBB = User->getOperand(1);
9900 DAG.UpdateNodeOperands(User, User->getOperand(0), Dest);
9901 assert(NewBR == User);
9905 Chain = DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
9906 Chain, Dest, CC, Cmp);
9907 X86::CondCode CCode =
9908 (X86::CondCode)Cond.getOperand(1).getConstantOperandVal(0);
9909 CCode = X86::GetOppositeBranchCondition(CCode);
9910 CC = DAG.getConstant(CCode, MVT::i8);
9916 } else if (Cond.hasOneUse() && isXor1OfSetCC(Cond)) {
9917 // Recognize for xorb (setcc), 1 patterns. The xor inverts the condition.
9918 // It should be transformed during dag combiner except when the condition
9919 // is set by a arithmetics with overflow node.
9920 X86::CondCode CCode =
9921 (X86::CondCode)Cond.getOperand(0).getConstantOperandVal(0);
9922 CCode = X86::GetOppositeBranchCondition(CCode);
9923 CC = DAG.getConstant(CCode, MVT::i8);
9924 Cond = Cond.getOperand(0).getOperand(1);
9926 } else if (Cond.getOpcode() == ISD::SETCC &&
9927 cast<CondCodeSDNode>(Cond.getOperand(2))->get() == ISD::SETOEQ) {
9928 // For FCMP_OEQ, we can emit
9929 // two branches instead of an explicit AND instruction with a
9930 // separate test. However, we only do this if this block doesn't
9931 // have a fall-through edge, because this requires an explicit
9932 // jmp when the condition is false.
9933 if (Op.getNode()->hasOneUse()) {
9934 SDNode *User = *Op.getNode()->use_begin();
9935 // Look for an unconditional branch following this conditional branch.
9936 // We need this because we need to reverse the successors in order
9937 // to implement FCMP_OEQ.
9938 if (User->getOpcode() == ISD::BR) {
9939 SDValue FalseBB = User->getOperand(1);
9941 DAG.UpdateNodeOperands(User, User->getOperand(0), Dest);
9942 assert(NewBR == User);
9946 SDValue Cmp = DAG.getNode(X86ISD::CMP, dl, MVT::i32,
9947 Cond.getOperand(0), Cond.getOperand(1));
9948 Cmp = ConvertCmpIfNecessary(Cmp, DAG);
9949 CC = DAG.getConstant(X86::COND_NE, MVT::i8);
9950 Chain = DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
9951 Chain, Dest, CC, Cmp);
9952 CC = DAG.getConstant(X86::COND_P, MVT::i8);
9957 } else if (Cond.getOpcode() == ISD::SETCC &&
9958 cast<CondCodeSDNode>(Cond.getOperand(2))->get() == ISD::SETUNE) {
9959 // For FCMP_UNE, we can emit
9960 // two branches instead of an explicit AND instruction with a
9961 // separate test. However, we only do this if this block doesn't
9962 // have a fall-through edge, because this requires an explicit
9963 // jmp when the condition is false.
9964 if (Op.getNode()->hasOneUse()) {
9965 SDNode *User = *Op.getNode()->use_begin();
9966 // Look for an unconditional branch following this conditional branch.
9967 // We need this because we need to reverse the successors in order
9968 // to implement FCMP_UNE.
9969 if (User->getOpcode() == ISD::BR) {
9970 SDValue FalseBB = User->getOperand(1);
9972 DAG.UpdateNodeOperands(User, User->getOperand(0), Dest);
9973 assert(NewBR == User);
9976 SDValue Cmp = DAG.getNode(X86ISD::CMP, dl, MVT::i32,
9977 Cond.getOperand(0), Cond.getOperand(1));
9978 Cmp = ConvertCmpIfNecessary(Cmp, DAG);
9979 CC = DAG.getConstant(X86::COND_NE, MVT::i8);
9980 Chain = DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
9981 Chain, Dest, CC, Cmp);
9982 CC = DAG.getConstant(X86::COND_NP, MVT::i8);
9992 // Look pass the truncate if the high bits are known zero.
9993 if (isTruncWithZeroHighBitsInput(Cond, DAG))
9994 Cond = Cond.getOperand(0);
9996 // We know the result of AND is compared against zero. Try to match
9998 if (Cond.getOpcode() == ISD::AND && Cond.hasOneUse()) {
9999 SDValue NewSetCC = LowerToBT(Cond, ISD::SETNE, dl, DAG);
10000 if (NewSetCC.getNode()) {
10001 CC = NewSetCC.getOperand(0);
10002 Cond = NewSetCC.getOperand(1);
10009 CC = DAG.getConstant(X86::COND_NE, MVT::i8);
10010 Cond = EmitTest(Cond, X86::COND_NE, DAG);
10012 Cond = ConvertCmpIfNecessary(Cond, DAG);
10013 return DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
10014 Chain, Dest, CC, Cond);
10017 // Lower dynamic stack allocation to _alloca call for Cygwin/Mingw targets.
10018 // Calls to _alloca is needed to probe the stack when allocating more than 4k
10019 // bytes in one go. Touching the stack at 4K increments is necessary to ensure
10020 // that the guard pages used by the OS virtual memory manager are allocated in
10021 // correct sequence.
10023 X86TargetLowering::LowerDYNAMIC_STACKALLOC(SDValue Op,
10024 SelectionDAG &DAG) const {
10025 assert((Subtarget->isTargetCygMing() || Subtarget->isTargetWindows() ||
10026 getTargetMachine().Options.EnableSegmentedStacks) &&
10027 "This should be used only on Windows targets or when segmented stacks "
10029 assert(!Subtarget->isTargetEnvMacho() && "Not implemented");
10030 DebugLoc dl = Op.getDebugLoc();
10033 SDValue Chain = Op.getOperand(0);
10034 SDValue Size = Op.getOperand(1);
10035 // FIXME: Ensure alignment here
10037 bool Is64Bit = Subtarget->is64Bit();
10038 EVT SPTy = Is64Bit ? MVT::i64 : MVT::i32;
10040 if (getTargetMachine().Options.EnableSegmentedStacks) {
10041 MachineFunction &MF = DAG.getMachineFunction();
10042 MachineRegisterInfo &MRI = MF.getRegInfo();
10045 // The 64 bit implementation of segmented stacks needs to clobber both r10
10046 // r11. This makes it impossible to use it along with nested parameters.
10047 const Function *F = MF.getFunction();
10049 for (Function::const_arg_iterator I = F->arg_begin(), E = F->arg_end();
10051 if (I->hasNestAttr())
10052 report_fatal_error("Cannot use segmented stacks with functions that "
10053 "have nested arguments.");
10056 const TargetRegisterClass *AddrRegClass =
10057 getRegClassFor(Subtarget->is64Bit() ? MVT::i64:MVT::i32);
10058 unsigned Vreg = MRI.createVirtualRegister(AddrRegClass);
10059 Chain = DAG.getCopyToReg(Chain, dl, Vreg, Size);
10060 SDValue Value = DAG.getNode(X86ISD::SEG_ALLOCA, dl, SPTy, Chain,
10061 DAG.getRegister(Vreg, SPTy));
10062 SDValue Ops1[2] = { Value, Chain };
10063 return DAG.getMergeValues(Ops1, 2, dl);
10066 unsigned Reg = (Subtarget->is64Bit() ? X86::RAX : X86::EAX);
10068 Chain = DAG.getCopyToReg(Chain, dl, Reg, Size, Flag);
10069 Flag = Chain.getValue(1);
10070 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
10072 Chain = DAG.getNode(X86ISD::WIN_ALLOCA, dl, NodeTys, Chain, Flag);
10073 Flag = Chain.getValue(1);
10075 Chain = DAG.getCopyFromReg(Chain, dl, RegInfo->getStackRegister(),
10078 SDValue Ops1[2] = { Chain.getValue(0), Chain };
10079 return DAG.getMergeValues(Ops1, 2, dl);
10083 SDValue X86TargetLowering::LowerVASTART(SDValue Op, SelectionDAG &DAG) const {
10084 MachineFunction &MF = DAG.getMachineFunction();
10085 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
10087 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
10088 DebugLoc DL = Op.getDebugLoc();
10090 if (!Subtarget->is64Bit() || Subtarget->isTargetWin64()) {
10091 // vastart just stores the address of the VarArgsFrameIndex slot into the
10092 // memory location argument.
10093 SDValue FR = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(),
10095 return DAG.getStore(Op.getOperand(0), DL, FR, Op.getOperand(1),
10096 MachinePointerInfo(SV), false, false, 0);
10100 // gp_offset (0 - 6 * 8)
10101 // fp_offset (48 - 48 + 8 * 16)
10102 // overflow_arg_area (point to parameters coming in memory).
10104 SmallVector<SDValue, 8> MemOps;
10105 SDValue FIN = Op.getOperand(1);
10107 SDValue Store = DAG.getStore(Op.getOperand(0), DL,
10108 DAG.getConstant(FuncInfo->getVarArgsGPOffset(),
10110 FIN, MachinePointerInfo(SV), false, false, 0);
10111 MemOps.push_back(Store);
10114 FIN = DAG.getNode(ISD::ADD, DL, getPointerTy(),
10115 FIN, DAG.getIntPtrConstant(4));
10116 Store = DAG.getStore(Op.getOperand(0), DL,
10117 DAG.getConstant(FuncInfo->getVarArgsFPOffset(),
10119 FIN, MachinePointerInfo(SV, 4), false, false, 0);
10120 MemOps.push_back(Store);
10122 // Store ptr to overflow_arg_area
10123 FIN = DAG.getNode(ISD::ADD, DL, getPointerTy(),
10124 FIN, DAG.getIntPtrConstant(4));
10125 SDValue OVFIN = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(),
10127 Store = DAG.getStore(Op.getOperand(0), DL, OVFIN, FIN,
10128 MachinePointerInfo(SV, 8),
10130 MemOps.push_back(Store);
10132 // Store ptr to reg_save_area.
10133 FIN = DAG.getNode(ISD::ADD, DL, getPointerTy(),
10134 FIN, DAG.getIntPtrConstant(8));
10135 SDValue RSFIN = DAG.getFrameIndex(FuncInfo->getRegSaveFrameIndex(),
10137 Store = DAG.getStore(Op.getOperand(0), DL, RSFIN, FIN,
10138 MachinePointerInfo(SV, 16), false, false, 0);
10139 MemOps.push_back(Store);
10140 return DAG.getNode(ISD::TokenFactor, DL, MVT::Other,
10141 &MemOps[0], MemOps.size());
10144 SDValue X86TargetLowering::LowerVAARG(SDValue Op, SelectionDAG &DAG) const {
10145 assert(Subtarget->is64Bit() &&
10146 "LowerVAARG only handles 64-bit va_arg!");
10147 assert((Subtarget->isTargetLinux() ||
10148 Subtarget->isTargetDarwin()) &&
10149 "Unhandled target in LowerVAARG");
10150 assert(Op.getNode()->getNumOperands() == 4);
10151 SDValue Chain = Op.getOperand(0);
10152 SDValue SrcPtr = Op.getOperand(1);
10153 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
10154 unsigned Align = Op.getConstantOperandVal(3);
10155 DebugLoc dl = Op.getDebugLoc();
10157 EVT ArgVT = Op.getNode()->getValueType(0);
10158 Type *ArgTy = ArgVT.getTypeForEVT(*DAG.getContext());
10159 uint32_t ArgSize = getDataLayout()->getTypeAllocSize(ArgTy);
10162 // Decide which area this value should be read from.
10163 // TODO: Implement the AMD64 ABI in its entirety. This simple
10164 // selection mechanism works only for the basic types.
10165 if (ArgVT == MVT::f80) {
10166 llvm_unreachable("va_arg for f80 not yet implemented");
10167 } else if (ArgVT.isFloatingPoint() && ArgSize <= 16 /*bytes*/) {
10168 ArgMode = 2; // Argument passed in XMM register. Use fp_offset.
10169 } else if (ArgVT.isInteger() && ArgSize <= 32 /*bytes*/) {
10170 ArgMode = 1; // Argument passed in GPR64 register(s). Use gp_offset.
10172 llvm_unreachable("Unhandled argument type in LowerVAARG");
10175 if (ArgMode == 2) {
10176 // Sanity Check: Make sure using fp_offset makes sense.
10177 assert(!getTargetMachine().Options.UseSoftFloat &&
10178 !(DAG.getMachineFunction()
10179 .getFunction()->getAttributes()
10180 .hasAttribute(AttributeSet::FunctionIndex,
10181 Attribute::NoImplicitFloat)) &&
10182 Subtarget->hasSSE1());
10185 // Insert VAARG_64 node into the DAG
10186 // VAARG_64 returns two values: Variable Argument Address, Chain
10187 SmallVector<SDValue, 11> InstOps;
10188 InstOps.push_back(Chain);
10189 InstOps.push_back(SrcPtr);
10190 InstOps.push_back(DAG.getConstant(ArgSize, MVT::i32));
10191 InstOps.push_back(DAG.getConstant(ArgMode, MVT::i8));
10192 InstOps.push_back(DAG.getConstant(Align, MVT::i32));
10193 SDVTList VTs = DAG.getVTList(getPointerTy(), MVT::Other);
10194 SDValue VAARG = DAG.getMemIntrinsicNode(X86ISD::VAARG_64, dl,
10195 VTs, &InstOps[0], InstOps.size(),
10197 MachinePointerInfo(SV),
10199 /*Volatile=*/false,
10201 /*WriteMem=*/true);
10202 Chain = VAARG.getValue(1);
10204 // Load the next argument and return it
10205 return DAG.getLoad(ArgVT, dl,
10208 MachinePointerInfo(),
10209 false, false, false, 0);
10212 static SDValue LowerVACOPY(SDValue Op, const X86Subtarget *Subtarget,
10213 SelectionDAG &DAG) {
10214 // X86-64 va_list is a struct { i32, i32, i8*, i8* }.
10215 assert(Subtarget->is64Bit() && "This code only handles 64-bit va_copy!");
10216 SDValue Chain = Op.getOperand(0);
10217 SDValue DstPtr = Op.getOperand(1);
10218 SDValue SrcPtr = Op.getOperand(2);
10219 const Value *DstSV = cast<SrcValueSDNode>(Op.getOperand(3))->getValue();
10220 const Value *SrcSV = cast<SrcValueSDNode>(Op.getOperand(4))->getValue();
10221 DebugLoc DL = Op.getDebugLoc();
10223 return DAG.getMemcpy(Chain, DL, DstPtr, SrcPtr,
10224 DAG.getIntPtrConstant(24), 8, /*isVolatile*/false,
10226 MachinePointerInfo(DstSV), MachinePointerInfo(SrcSV));
10229 // getTargetVShiftNode - Handle vector element shifts where the shift amount
10230 // may or may not be a constant. Takes immediate version of shift as input.
10231 static SDValue getTargetVShiftNode(unsigned Opc, DebugLoc dl, EVT VT,
10232 SDValue SrcOp, SDValue ShAmt,
10233 SelectionDAG &DAG) {
10234 assert(ShAmt.getValueType() == MVT::i32 && "ShAmt is not i32");
10236 if (isa<ConstantSDNode>(ShAmt)) {
10237 // Constant may be a TargetConstant. Use a regular constant.
10238 uint32_t ShiftAmt = cast<ConstantSDNode>(ShAmt)->getZExtValue();
10240 default: llvm_unreachable("Unknown target vector shift node");
10241 case X86ISD::VSHLI:
10242 case X86ISD::VSRLI:
10243 case X86ISD::VSRAI:
10244 return DAG.getNode(Opc, dl, VT, SrcOp,
10245 DAG.getConstant(ShiftAmt, MVT::i32));
10249 // Change opcode to non-immediate version
10251 default: llvm_unreachable("Unknown target vector shift node");
10252 case X86ISD::VSHLI: Opc = X86ISD::VSHL; break;
10253 case X86ISD::VSRLI: Opc = X86ISD::VSRL; break;
10254 case X86ISD::VSRAI: Opc = X86ISD::VSRA; break;
10257 // Need to build a vector containing shift amount
10258 // Shift amount is 32-bits, but SSE instructions read 64-bit, so fill with 0
10261 ShOps[1] = DAG.getConstant(0, MVT::i32);
10262 ShOps[2] = ShOps[3] = DAG.getUNDEF(MVT::i32);
10263 ShAmt = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, &ShOps[0], 4);
10265 // The return type has to be a 128-bit type with the same element
10266 // type as the input type.
10267 MVT EltVT = VT.getVectorElementType().getSimpleVT();
10268 EVT ShVT = MVT::getVectorVT(EltVT, 128/EltVT.getSizeInBits());
10270 ShAmt = DAG.getNode(ISD::BITCAST, dl, ShVT, ShAmt);
10271 return DAG.getNode(Opc, dl, VT, SrcOp, ShAmt);
10274 static SDValue LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) {
10275 DebugLoc dl = Op.getDebugLoc();
10276 unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
10278 default: return SDValue(); // Don't custom lower most intrinsics.
10279 // Comparison intrinsics.
10280 case Intrinsic::x86_sse_comieq_ss:
10281 case Intrinsic::x86_sse_comilt_ss:
10282 case Intrinsic::x86_sse_comile_ss:
10283 case Intrinsic::x86_sse_comigt_ss:
10284 case Intrinsic::x86_sse_comige_ss:
10285 case Intrinsic::x86_sse_comineq_ss:
10286 case Intrinsic::x86_sse_ucomieq_ss:
10287 case Intrinsic::x86_sse_ucomilt_ss:
10288 case Intrinsic::x86_sse_ucomile_ss:
10289 case Intrinsic::x86_sse_ucomigt_ss:
10290 case Intrinsic::x86_sse_ucomige_ss:
10291 case Intrinsic::x86_sse_ucomineq_ss:
10292 case Intrinsic::x86_sse2_comieq_sd:
10293 case Intrinsic::x86_sse2_comilt_sd:
10294 case Intrinsic::x86_sse2_comile_sd:
10295 case Intrinsic::x86_sse2_comigt_sd:
10296 case Intrinsic::x86_sse2_comige_sd:
10297 case Intrinsic::x86_sse2_comineq_sd:
10298 case Intrinsic::x86_sse2_ucomieq_sd:
10299 case Intrinsic::x86_sse2_ucomilt_sd:
10300 case Intrinsic::x86_sse2_ucomile_sd:
10301 case Intrinsic::x86_sse2_ucomigt_sd:
10302 case Intrinsic::x86_sse2_ucomige_sd:
10303 case Intrinsic::x86_sse2_ucomineq_sd: {
10307 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
10308 case Intrinsic::x86_sse_comieq_ss:
10309 case Intrinsic::x86_sse2_comieq_sd:
10310 Opc = X86ISD::COMI;
10313 case Intrinsic::x86_sse_comilt_ss:
10314 case Intrinsic::x86_sse2_comilt_sd:
10315 Opc = X86ISD::COMI;
10318 case Intrinsic::x86_sse_comile_ss:
10319 case Intrinsic::x86_sse2_comile_sd:
10320 Opc = X86ISD::COMI;
10323 case Intrinsic::x86_sse_comigt_ss:
10324 case Intrinsic::x86_sse2_comigt_sd:
10325 Opc = X86ISD::COMI;
10328 case Intrinsic::x86_sse_comige_ss:
10329 case Intrinsic::x86_sse2_comige_sd:
10330 Opc = X86ISD::COMI;
10333 case Intrinsic::x86_sse_comineq_ss:
10334 case Intrinsic::x86_sse2_comineq_sd:
10335 Opc = X86ISD::COMI;
10338 case Intrinsic::x86_sse_ucomieq_ss:
10339 case Intrinsic::x86_sse2_ucomieq_sd:
10340 Opc = X86ISD::UCOMI;
10343 case Intrinsic::x86_sse_ucomilt_ss:
10344 case Intrinsic::x86_sse2_ucomilt_sd:
10345 Opc = X86ISD::UCOMI;
10348 case Intrinsic::x86_sse_ucomile_ss:
10349 case Intrinsic::x86_sse2_ucomile_sd:
10350 Opc = X86ISD::UCOMI;
10353 case Intrinsic::x86_sse_ucomigt_ss:
10354 case Intrinsic::x86_sse2_ucomigt_sd:
10355 Opc = X86ISD::UCOMI;
10358 case Intrinsic::x86_sse_ucomige_ss:
10359 case Intrinsic::x86_sse2_ucomige_sd:
10360 Opc = X86ISD::UCOMI;
10363 case Intrinsic::x86_sse_ucomineq_ss:
10364 case Intrinsic::x86_sse2_ucomineq_sd:
10365 Opc = X86ISD::UCOMI;
10370 SDValue LHS = Op.getOperand(1);
10371 SDValue RHS = Op.getOperand(2);
10372 unsigned X86CC = TranslateX86CC(CC, true, LHS, RHS, DAG);
10373 assert(X86CC != X86::COND_INVALID && "Unexpected illegal condition!");
10374 SDValue Cond = DAG.getNode(Opc, dl, MVT::i32, LHS, RHS);
10375 SDValue SetCC = DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
10376 DAG.getConstant(X86CC, MVT::i8), Cond);
10377 return DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, SetCC);
10380 // Arithmetic intrinsics.
10381 case Intrinsic::x86_sse2_pmulu_dq:
10382 case Intrinsic::x86_avx2_pmulu_dq:
10383 return DAG.getNode(X86ISD::PMULUDQ, dl, Op.getValueType(),
10384 Op.getOperand(1), Op.getOperand(2));
10386 // SSE2/AVX2 sub with unsigned saturation intrinsics
10387 case Intrinsic::x86_sse2_psubus_b:
10388 case Intrinsic::x86_sse2_psubus_w:
10389 case Intrinsic::x86_avx2_psubus_b:
10390 case Intrinsic::x86_avx2_psubus_w:
10391 return DAG.getNode(X86ISD::SUBUS, dl, Op.getValueType(),
10392 Op.getOperand(1), Op.getOperand(2));
10394 // SSE3/AVX horizontal add/sub intrinsics
10395 case Intrinsic::x86_sse3_hadd_ps:
10396 case Intrinsic::x86_sse3_hadd_pd:
10397 case Intrinsic::x86_avx_hadd_ps_256:
10398 case Intrinsic::x86_avx_hadd_pd_256:
10399 case Intrinsic::x86_sse3_hsub_ps:
10400 case Intrinsic::x86_sse3_hsub_pd:
10401 case Intrinsic::x86_avx_hsub_ps_256:
10402 case Intrinsic::x86_avx_hsub_pd_256:
10403 case Intrinsic::x86_ssse3_phadd_w_128:
10404 case Intrinsic::x86_ssse3_phadd_d_128:
10405 case Intrinsic::x86_avx2_phadd_w:
10406 case Intrinsic::x86_avx2_phadd_d:
10407 case Intrinsic::x86_ssse3_phsub_w_128:
10408 case Intrinsic::x86_ssse3_phsub_d_128:
10409 case Intrinsic::x86_avx2_phsub_w:
10410 case Intrinsic::x86_avx2_phsub_d: {
10413 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
10414 case Intrinsic::x86_sse3_hadd_ps:
10415 case Intrinsic::x86_sse3_hadd_pd:
10416 case Intrinsic::x86_avx_hadd_ps_256:
10417 case Intrinsic::x86_avx_hadd_pd_256:
10418 Opcode = X86ISD::FHADD;
10420 case Intrinsic::x86_sse3_hsub_ps:
10421 case Intrinsic::x86_sse3_hsub_pd:
10422 case Intrinsic::x86_avx_hsub_ps_256:
10423 case Intrinsic::x86_avx_hsub_pd_256:
10424 Opcode = X86ISD::FHSUB;
10426 case Intrinsic::x86_ssse3_phadd_w_128:
10427 case Intrinsic::x86_ssse3_phadd_d_128:
10428 case Intrinsic::x86_avx2_phadd_w:
10429 case Intrinsic::x86_avx2_phadd_d:
10430 Opcode = X86ISD::HADD;
10432 case Intrinsic::x86_ssse3_phsub_w_128:
10433 case Intrinsic::x86_ssse3_phsub_d_128:
10434 case Intrinsic::x86_avx2_phsub_w:
10435 case Intrinsic::x86_avx2_phsub_d:
10436 Opcode = X86ISD::HSUB;
10439 return DAG.getNode(Opcode, dl, Op.getValueType(),
10440 Op.getOperand(1), Op.getOperand(2));
10443 // SSE2/SSE41/AVX2 integer max/min intrinsics.
10444 case Intrinsic::x86_sse2_pmaxu_b:
10445 case Intrinsic::x86_sse41_pmaxuw:
10446 case Intrinsic::x86_sse41_pmaxud:
10447 case Intrinsic::x86_avx2_pmaxu_b:
10448 case Intrinsic::x86_avx2_pmaxu_w:
10449 case Intrinsic::x86_avx2_pmaxu_d:
10450 case Intrinsic::x86_sse2_pminu_b:
10451 case Intrinsic::x86_sse41_pminuw:
10452 case Intrinsic::x86_sse41_pminud:
10453 case Intrinsic::x86_avx2_pminu_b:
10454 case Intrinsic::x86_avx2_pminu_w:
10455 case Intrinsic::x86_avx2_pminu_d:
10456 case Intrinsic::x86_sse41_pmaxsb:
10457 case Intrinsic::x86_sse2_pmaxs_w:
10458 case Intrinsic::x86_sse41_pmaxsd:
10459 case Intrinsic::x86_avx2_pmaxs_b:
10460 case Intrinsic::x86_avx2_pmaxs_w:
10461 case Intrinsic::x86_avx2_pmaxs_d:
10462 case Intrinsic::x86_sse41_pminsb:
10463 case Intrinsic::x86_sse2_pmins_w:
10464 case Intrinsic::x86_sse41_pminsd:
10465 case Intrinsic::x86_avx2_pmins_b:
10466 case Intrinsic::x86_avx2_pmins_w:
10467 case Intrinsic::x86_avx2_pmins_d: {
10470 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
10471 case Intrinsic::x86_sse2_pmaxu_b:
10472 case Intrinsic::x86_sse41_pmaxuw:
10473 case Intrinsic::x86_sse41_pmaxud:
10474 case Intrinsic::x86_avx2_pmaxu_b:
10475 case Intrinsic::x86_avx2_pmaxu_w:
10476 case Intrinsic::x86_avx2_pmaxu_d:
10477 Opcode = X86ISD::UMAX;
10479 case Intrinsic::x86_sse2_pminu_b:
10480 case Intrinsic::x86_sse41_pminuw:
10481 case Intrinsic::x86_sse41_pminud:
10482 case Intrinsic::x86_avx2_pminu_b:
10483 case Intrinsic::x86_avx2_pminu_w:
10484 case Intrinsic::x86_avx2_pminu_d:
10485 Opcode = X86ISD::UMIN;
10487 case Intrinsic::x86_sse41_pmaxsb:
10488 case Intrinsic::x86_sse2_pmaxs_w:
10489 case Intrinsic::x86_sse41_pmaxsd:
10490 case Intrinsic::x86_avx2_pmaxs_b:
10491 case Intrinsic::x86_avx2_pmaxs_w:
10492 case Intrinsic::x86_avx2_pmaxs_d:
10493 Opcode = X86ISD::SMAX;
10495 case Intrinsic::x86_sse41_pminsb:
10496 case Intrinsic::x86_sse2_pmins_w:
10497 case Intrinsic::x86_sse41_pminsd:
10498 case Intrinsic::x86_avx2_pmins_b:
10499 case Intrinsic::x86_avx2_pmins_w:
10500 case Intrinsic::x86_avx2_pmins_d:
10501 Opcode = X86ISD::SMIN;
10504 return DAG.getNode(Opcode, dl, Op.getValueType(),
10505 Op.getOperand(1), Op.getOperand(2));
10508 // SSE/SSE2/AVX floating point max/min intrinsics.
10509 case Intrinsic::x86_sse_max_ps:
10510 case Intrinsic::x86_sse2_max_pd:
10511 case Intrinsic::x86_avx_max_ps_256:
10512 case Intrinsic::x86_avx_max_pd_256:
10513 case Intrinsic::x86_sse_min_ps:
10514 case Intrinsic::x86_sse2_min_pd:
10515 case Intrinsic::x86_avx_min_ps_256:
10516 case Intrinsic::x86_avx_min_pd_256: {
10519 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
10520 case Intrinsic::x86_sse_max_ps:
10521 case Intrinsic::x86_sse2_max_pd:
10522 case Intrinsic::x86_avx_max_ps_256:
10523 case Intrinsic::x86_avx_max_pd_256:
10524 Opcode = X86ISD::FMAX;
10526 case Intrinsic::x86_sse_min_ps:
10527 case Intrinsic::x86_sse2_min_pd:
10528 case Intrinsic::x86_avx_min_ps_256:
10529 case Intrinsic::x86_avx_min_pd_256:
10530 Opcode = X86ISD::FMIN;
10533 return DAG.getNode(Opcode, dl, Op.getValueType(),
10534 Op.getOperand(1), Op.getOperand(2));
10537 // AVX2 variable shift intrinsics
10538 case Intrinsic::x86_avx2_psllv_d:
10539 case Intrinsic::x86_avx2_psllv_q:
10540 case Intrinsic::x86_avx2_psllv_d_256:
10541 case Intrinsic::x86_avx2_psllv_q_256:
10542 case Intrinsic::x86_avx2_psrlv_d:
10543 case Intrinsic::x86_avx2_psrlv_q:
10544 case Intrinsic::x86_avx2_psrlv_d_256:
10545 case Intrinsic::x86_avx2_psrlv_q_256:
10546 case Intrinsic::x86_avx2_psrav_d:
10547 case Intrinsic::x86_avx2_psrav_d_256: {
10550 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
10551 case Intrinsic::x86_avx2_psllv_d:
10552 case Intrinsic::x86_avx2_psllv_q:
10553 case Intrinsic::x86_avx2_psllv_d_256:
10554 case Intrinsic::x86_avx2_psllv_q_256:
10557 case Intrinsic::x86_avx2_psrlv_d:
10558 case Intrinsic::x86_avx2_psrlv_q:
10559 case Intrinsic::x86_avx2_psrlv_d_256:
10560 case Intrinsic::x86_avx2_psrlv_q_256:
10563 case Intrinsic::x86_avx2_psrav_d:
10564 case Intrinsic::x86_avx2_psrav_d_256:
10568 return DAG.getNode(Opcode, dl, Op.getValueType(),
10569 Op.getOperand(1), Op.getOperand(2));
10572 case Intrinsic::x86_ssse3_pshuf_b_128:
10573 case Intrinsic::x86_avx2_pshuf_b:
10574 return DAG.getNode(X86ISD::PSHUFB, dl, Op.getValueType(),
10575 Op.getOperand(1), Op.getOperand(2));
10577 case Intrinsic::x86_ssse3_psign_b_128:
10578 case Intrinsic::x86_ssse3_psign_w_128:
10579 case Intrinsic::x86_ssse3_psign_d_128:
10580 case Intrinsic::x86_avx2_psign_b:
10581 case Intrinsic::x86_avx2_psign_w:
10582 case Intrinsic::x86_avx2_psign_d:
10583 return DAG.getNode(X86ISD::PSIGN, dl, Op.getValueType(),
10584 Op.getOperand(1), Op.getOperand(2));
10586 case Intrinsic::x86_sse41_insertps:
10587 return DAG.getNode(X86ISD::INSERTPS, dl, Op.getValueType(),
10588 Op.getOperand(1), Op.getOperand(2), Op.getOperand(3));
10590 case Intrinsic::x86_avx_vperm2f128_ps_256:
10591 case Intrinsic::x86_avx_vperm2f128_pd_256:
10592 case Intrinsic::x86_avx_vperm2f128_si_256:
10593 case Intrinsic::x86_avx2_vperm2i128:
10594 return DAG.getNode(X86ISD::VPERM2X128, dl, Op.getValueType(),
10595 Op.getOperand(1), Op.getOperand(2), Op.getOperand(3));
10597 case Intrinsic::x86_avx2_permd:
10598 case Intrinsic::x86_avx2_permps:
10599 // Operands intentionally swapped. Mask is last operand to intrinsic,
10600 // but second operand for node/intruction.
10601 return DAG.getNode(X86ISD::VPERMV, dl, Op.getValueType(),
10602 Op.getOperand(2), Op.getOperand(1));
10604 case Intrinsic::x86_sse_sqrt_ps:
10605 case Intrinsic::x86_sse2_sqrt_pd:
10606 case Intrinsic::x86_avx_sqrt_ps_256:
10607 case Intrinsic::x86_avx_sqrt_pd_256:
10608 return DAG.getNode(ISD::FSQRT, dl, Op.getValueType(), Op.getOperand(1));
10610 // ptest and testp intrinsics. The intrinsic these come from are designed to
10611 // return an integer value, not just an instruction so lower it to the ptest
10612 // or testp pattern and a setcc for the result.
10613 case Intrinsic::x86_sse41_ptestz:
10614 case Intrinsic::x86_sse41_ptestc:
10615 case Intrinsic::x86_sse41_ptestnzc:
10616 case Intrinsic::x86_avx_ptestz_256:
10617 case Intrinsic::x86_avx_ptestc_256:
10618 case Intrinsic::x86_avx_ptestnzc_256:
10619 case Intrinsic::x86_avx_vtestz_ps:
10620 case Intrinsic::x86_avx_vtestc_ps:
10621 case Intrinsic::x86_avx_vtestnzc_ps:
10622 case Intrinsic::x86_avx_vtestz_pd:
10623 case Intrinsic::x86_avx_vtestc_pd:
10624 case Intrinsic::x86_avx_vtestnzc_pd:
10625 case Intrinsic::x86_avx_vtestz_ps_256:
10626 case Intrinsic::x86_avx_vtestc_ps_256:
10627 case Intrinsic::x86_avx_vtestnzc_ps_256:
10628 case Intrinsic::x86_avx_vtestz_pd_256:
10629 case Intrinsic::x86_avx_vtestc_pd_256:
10630 case Intrinsic::x86_avx_vtestnzc_pd_256: {
10631 bool IsTestPacked = false;
10634 default: llvm_unreachable("Bad fallthrough in Intrinsic lowering.");
10635 case Intrinsic::x86_avx_vtestz_ps:
10636 case Intrinsic::x86_avx_vtestz_pd:
10637 case Intrinsic::x86_avx_vtestz_ps_256:
10638 case Intrinsic::x86_avx_vtestz_pd_256:
10639 IsTestPacked = true; // Fallthrough
10640 case Intrinsic::x86_sse41_ptestz:
10641 case Intrinsic::x86_avx_ptestz_256:
10643 X86CC = X86::COND_E;
10645 case Intrinsic::x86_avx_vtestc_ps:
10646 case Intrinsic::x86_avx_vtestc_pd:
10647 case Intrinsic::x86_avx_vtestc_ps_256:
10648 case Intrinsic::x86_avx_vtestc_pd_256:
10649 IsTestPacked = true; // Fallthrough
10650 case Intrinsic::x86_sse41_ptestc:
10651 case Intrinsic::x86_avx_ptestc_256:
10653 X86CC = X86::COND_B;
10655 case Intrinsic::x86_avx_vtestnzc_ps:
10656 case Intrinsic::x86_avx_vtestnzc_pd:
10657 case Intrinsic::x86_avx_vtestnzc_ps_256:
10658 case Intrinsic::x86_avx_vtestnzc_pd_256:
10659 IsTestPacked = true; // Fallthrough
10660 case Intrinsic::x86_sse41_ptestnzc:
10661 case Intrinsic::x86_avx_ptestnzc_256:
10663 X86CC = X86::COND_A;
10667 SDValue LHS = Op.getOperand(1);
10668 SDValue RHS = Op.getOperand(2);
10669 unsigned TestOpc = IsTestPacked ? X86ISD::TESTP : X86ISD::PTEST;
10670 SDValue Test = DAG.getNode(TestOpc, dl, MVT::i32, LHS, RHS);
10671 SDValue CC = DAG.getConstant(X86CC, MVT::i8);
10672 SDValue SetCC = DAG.getNode(X86ISD::SETCC, dl, MVT::i8, CC, Test);
10673 return DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, SetCC);
10676 // SSE/AVX shift intrinsics
10677 case Intrinsic::x86_sse2_psll_w:
10678 case Intrinsic::x86_sse2_psll_d:
10679 case Intrinsic::x86_sse2_psll_q:
10680 case Intrinsic::x86_avx2_psll_w:
10681 case Intrinsic::x86_avx2_psll_d:
10682 case Intrinsic::x86_avx2_psll_q:
10683 case Intrinsic::x86_sse2_psrl_w:
10684 case Intrinsic::x86_sse2_psrl_d:
10685 case Intrinsic::x86_sse2_psrl_q:
10686 case Intrinsic::x86_avx2_psrl_w:
10687 case Intrinsic::x86_avx2_psrl_d:
10688 case Intrinsic::x86_avx2_psrl_q:
10689 case Intrinsic::x86_sse2_psra_w:
10690 case Intrinsic::x86_sse2_psra_d:
10691 case Intrinsic::x86_avx2_psra_w:
10692 case Intrinsic::x86_avx2_psra_d: {
10695 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
10696 case Intrinsic::x86_sse2_psll_w:
10697 case Intrinsic::x86_sse2_psll_d:
10698 case Intrinsic::x86_sse2_psll_q:
10699 case Intrinsic::x86_avx2_psll_w:
10700 case Intrinsic::x86_avx2_psll_d:
10701 case Intrinsic::x86_avx2_psll_q:
10702 Opcode = X86ISD::VSHL;
10704 case Intrinsic::x86_sse2_psrl_w:
10705 case Intrinsic::x86_sse2_psrl_d:
10706 case Intrinsic::x86_sse2_psrl_q:
10707 case Intrinsic::x86_avx2_psrl_w:
10708 case Intrinsic::x86_avx2_psrl_d:
10709 case Intrinsic::x86_avx2_psrl_q:
10710 Opcode = X86ISD::VSRL;
10712 case Intrinsic::x86_sse2_psra_w:
10713 case Intrinsic::x86_sse2_psra_d:
10714 case Intrinsic::x86_avx2_psra_w:
10715 case Intrinsic::x86_avx2_psra_d:
10716 Opcode = X86ISD::VSRA;
10719 return DAG.getNode(Opcode, dl, Op.getValueType(),
10720 Op.getOperand(1), Op.getOperand(2));
10723 // SSE/AVX immediate shift intrinsics
10724 case Intrinsic::x86_sse2_pslli_w:
10725 case Intrinsic::x86_sse2_pslli_d:
10726 case Intrinsic::x86_sse2_pslli_q:
10727 case Intrinsic::x86_avx2_pslli_w:
10728 case Intrinsic::x86_avx2_pslli_d:
10729 case Intrinsic::x86_avx2_pslli_q:
10730 case Intrinsic::x86_sse2_psrli_w:
10731 case Intrinsic::x86_sse2_psrli_d:
10732 case Intrinsic::x86_sse2_psrli_q:
10733 case Intrinsic::x86_avx2_psrli_w:
10734 case Intrinsic::x86_avx2_psrli_d:
10735 case Intrinsic::x86_avx2_psrli_q:
10736 case Intrinsic::x86_sse2_psrai_w:
10737 case Intrinsic::x86_sse2_psrai_d:
10738 case Intrinsic::x86_avx2_psrai_w:
10739 case Intrinsic::x86_avx2_psrai_d: {
10742 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
10743 case Intrinsic::x86_sse2_pslli_w:
10744 case Intrinsic::x86_sse2_pslli_d:
10745 case Intrinsic::x86_sse2_pslli_q:
10746 case Intrinsic::x86_avx2_pslli_w:
10747 case Intrinsic::x86_avx2_pslli_d:
10748 case Intrinsic::x86_avx2_pslli_q:
10749 Opcode = X86ISD::VSHLI;
10751 case Intrinsic::x86_sse2_psrli_w:
10752 case Intrinsic::x86_sse2_psrli_d:
10753 case Intrinsic::x86_sse2_psrli_q:
10754 case Intrinsic::x86_avx2_psrli_w:
10755 case Intrinsic::x86_avx2_psrli_d:
10756 case Intrinsic::x86_avx2_psrli_q:
10757 Opcode = X86ISD::VSRLI;
10759 case Intrinsic::x86_sse2_psrai_w:
10760 case Intrinsic::x86_sse2_psrai_d:
10761 case Intrinsic::x86_avx2_psrai_w:
10762 case Intrinsic::x86_avx2_psrai_d:
10763 Opcode = X86ISD::VSRAI;
10766 return getTargetVShiftNode(Opcode, dl, Op.getValueType(),
10767 Op.getOperand(1), Op.getOperand(2), DAG);
10770 case Intrinsic::x86_sse42_pcmpistria128:
10771 case Intrinsic::x86_sse42_pcmpestria128:
10772 case Intrinsic::x86_sse42_pcmpistric128:
10773 case Intrinsic::x86_sse42_pcmpestric128:
10774 case Intrinsic::x86_sse42_pcmpistrio128:
10775 case Intrinsic::x86_sse42_pcmpestrio128:
10776 case Intrinsic::x86_sse42_pcmpistris128:
10777 case Intrinsic::x86_sse42_pcmpestris128:
10778 case Intrinsic::x86_sse42_pcmpistriz128:
10779 case Intrinsic::x86_sse42_pcmpestriz128: {
10783 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
10784 case Intrinsic::x86_sse42_pcmpistria128:
10785 Opcode = X86ISD::PCMPISTRI;
10786 X86CC = X86::COND_A;
10788 case Intrinsic::x86_sse42_pcmpestria128:
10789 Opcode = X86ISD::PCMPESTRI;
10790 X86CC = X86::COND_A;
10792 case Intrinsic::x86_sse42_pcmpistric128:
10793 Opcode = X86ISD::PCMPISTRI;
10794 X86CC = X86::COND_B;
10796 case Intrinsic::x86_sse42_pcmpestric128:
10797 Opcode = X86ISD::PCMPESTRI;
10798 X86CC = X86::COND_B;
10800 case Intrinsic::x86_sse42_pcmpistrio128:
10801 Opcode = X86ISD::PCMPISTRI;
10802 X86CC = X86::COND_O;
10804 case Intrinsic::x86_sse42_pcmpestrio128:
10805 Opcode = X86ISD::PCMPESTRI;
10806 X86CC = X86::COND_O;
10808 case Intrinsic::x86_sse42_pcmpistris128:
10809 Opcode = X86ISD::PCMPISTRI;
10810 X86CC = X86::COND_S;
10812 case Intrinsic::x86_sse42_pcmpestris128:
10813 Opcode = X86ISD::PCMPESTRI;
10814 X86CC = X86::COND_S;
10816 case Intrinsic::x86_sse42_pcmpistriz128:
10817 Opcode = X86ISD::PCMPISTRI;
10818 X86CC = X86::COND_E;
10820 case Intrinsic::x86_sse42_pcmpestriz128:
10821 Opcode = X86ISD::PCMPESTRI;
10822 X86CC = X86::COND_E;
10825 SmallVector<SDValue, 5> NewOps;
10826 NewOps.append(Op->op_begin()+1, Op->op_end());
10827 SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::i32);
10828 SDValue PCMP = DAG.getNode(Opcode, dl, VTs, NewOps.data(), NewOps.size());
10829 SDValue SetCC = DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
10830 DAG.getConstant(X86CC, MVT::i8),
10831 SDValue(PCMP.getNode(), 1));
10832 return DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, SetCC);
10835 case Intrinsic::x86_sse42_pcmpistri128:
10836 case Intrinsic::x86_sse42_pcmpestri128: {
10838 if (IntNo == Intrinsic::x86_sse42_pcmpistri128)
10839 Opcode = X86ISD::PCMPISTRI;
10841 Opcode = X86ISD::PCMPESTRI;
10843 SmallVector<SDValue, 5> NewOps;
10844 NewOps.append(Op->op_begin()+1, Op->op_end());
10845 SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::i32);
10846 return DAG.getNode(Opcode, dl, VTs, NewOps.data(), NewOps.size());
10848 case Intrinsic::x86_fma_vfmadd_ps:
10849 case Intrinsic::x86_fma_vfmadd_pd:
10850 case Intrinsic::x86_fma_vfmsub_ps:
10851 case Intrinsic::x86_fma_vfmsub_pd:
10852 case Intrinsic::x86_fma_vfnmadd_ps:
10853 case Intrinsic::x86_fma_vfnmadd_pd:
10854 case Intrinsic::x86_fma_vfnmsub_ps:
10855 case Intrinsic::x86_fma_vfnmsub_pd:
10856 case Intrinsic::x86_fma_vfmaddsub_ps:
10857 case Intrinsic::x86_fma_vfmaddsub_pd:
10858 case Intrinsic::x86_fma_vfmsubadd_ps:
10859 case Intrinsic::x86_fma_vfmsubadd_pd:
10860 case Intrinsic::x86_fma_vfmadd_ps_256:
10861 case Intrinsic::x86_fma_vfmadd_pd_256:
10862 case Intrinsic::x86_fma_vfmsub_ps_256:
10863 case Intrinsic::x86_fma_vfmsub_pd_256:
10864 case Intrinsic::x86_fma_vfnmadd_ps_256:
10865 case Intrinsic::x86_fma_vfnmadd_pd_256:
10866 case Intrinsic::x86_fma_vfnmsub_ps_256:
10867 case Intrinsic::x86_fma_vfnmsub_pd_256:
10868 case Intrinsic::x86_fma_vfmaddsub_ps_256:
10869 case Intrinsic::x86_fma_vfmaddsub_pd_256:
10870 case Intrinsic::x86_fma_vfmsubadd_ps_256:
10871 case Intrinsic::x86_fma_vfmsubadd_pd_256: {
10874 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
10875 case Intrinsic::x86_fma_vfmadd_ps:
10876 case Intrinsic::x86_fma_vfmadd_pd:
10877 case Intrinsic::x86_fma_vfmadd_ps_256:
10878 case Intrinsic::x86_fma_vfmadd_pd_256:
10879 Opc = X86ISD::FMADD;
10881 case Intrinsic::x86_fma_vfmsub_ps:
10882 case Intrinsic::x86_fma_vfmsub_pd:
10883 case Intrinsic::x86_fma_vfmsub_ps_256:
10884 case Intrinsic::x86_fma_vfmsub_pd_256:
10885 Opc = X86ISD::FMSUB;
10887 case Intrinsic::x86_fma_vfnmadd_ps:
10888 case Intrinsic::x86_fma_vfnmadd_pd:
10889 case Intrinsic::x86_fma_vfnmadd_ps_256:
10890 case Intrinsic::x86_fma_vfnmadd_pd_256:
10891 Opc = X86ISD::FNMADD;
10893 case Intrinsic::x86_fma_vfnmsub_ps:
10894 case Intrinsic::x86_fma_vfnmsub_pd:
10895 case Intrinsic::x86_fma_vfnmsub_ps_256:
10896 case Intrinsic::x86_fma_vfnmsub_pd_256:
10897 Opc = X86ISD::FNMSUB;
10899 case Intrinsic::x86_fma_vfmaddsub_ps:
10900 case Intrinsic::x86_fma_vfmaddsub_pd:
10901 case Intrinsic::x86_fma_vfmaddsub_ps_256:
10902 case Intrinsic::x86_fma_vfmaddsub_pd_256:
10903 Opc = X86ISD::FMADDSUB;
10905 case Intrinsic::x86_fma_vfmsubadd_ps:
10906 case Intrinsic::x86_fma_vfmsubadd_pd:
10907 case Intrinsic::x86_fma_vfmsubadd_ps_256:
10908 case Intrinsic::x86_fma_vfmsubadd_pd_256:
10909 Opc = X86ISD::FMSUBADD;
10913 return DAG.getNode(Opc, dl, Op.getValueType(), Op.getOperand(1),
10914 Op.getOperand(2), Op.getOperand(3));
10919 static SDValue LowerINTRINSIC_W_CHAIN(SDValue Op, SelectionDAG &DAG) {
10920 DebugLoc dl = Op.getDebugLoc();
10921 unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
10923 default: return SDValue(); // Don't custom lower most intrinsics.
10925 // RDRAND intrinsics.
10926 case Intrinsic::x86_rdrand_16:
10927 case Intrinsic::x86_rdrand_32:
10928 case Intrinsic::x86_rdrand_64: {
10929 // Emit the node with the right value type.
10930 SDVTList VTs = DAG.getVTList(Op->getValueType(0), MVT::Glue, MVT::Other);
10931 SDValue Result = DAG.getNode(X86ISD::RDRAND, dl, VTs, Op.getOperand(0));
10933 // If the value returned by RDRAND was valid (CF=1), return 1. Otherwise
10934 // return the value from Rand, which is always 0, casted to i32.
10935 SDValue Ops[] = { DAG.getZExtOrTrunc(Result, dl, Op->getValueType(1)),
10936 DAG.getConstant(1, Op->getValueType(1)),
10937 DAG.getConstant(X86::COND_B, MVT::i32),
10938 SDValue(Result.getNode(), 1) };
10939 SDValue isValid = DAG.getNode(X86ISD::CMOV, dl,
10940 DAG.getVTList(Op->getValueType(1), MVT::Glue),
10943 // Return { result, isValid, chain }.
10944 return DAG.getNode(ISD::MERGE_VALUES, dl, Op->getVTList(), Result, isValid,
10945 SDValue(Result.getNode(), 2));
10950 SDValue X86TargetLowering::LowerRETURNADDR(SDValue Op,
10951 SelectionDAG &DAG) const {
10952 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
10953 MFI->setReturnAddressIsTaken(true);
10955 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
10956 DebugLoc dl = Op.getDebugLoc();
10957 EVT PtrVT = getPointerTy();
10960 SDValue FrameAddr = LowerFRAMEADDR(Op, DAG);
10962 DAG.getConstant(RegInfo->getSlotSize(), PtrVT);
10963 return DAG.getLoad(PtrVT, dl, DAG.getEntryNode(),
10964 DAG.getNode(ISD::ADD, dl, PtrVT,
10965 FrameAddr, Offset),
10966 MachinePointerInfo(), false, false, false, 0);
10969 // Just load the return address.
10970 SDValue RetAddrFI = getReturnAddressFrameIndex(DAG);
10971 return DAG.getLoad(PtrVT, dl, DAG.getEntryNode(),
10972 RetAddrFI, MachinePointerInfo(), false, false, false, 0);
10975 SDValue X86TargetLowering::LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const {
10976 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
10977 MFI->setFrameAddressIsTaken(true);
10979 EVT VT = Op.getValueType();
10980 DebugLoc dl = Op.getDebugLoc(); // FIXME probably not meaningful
10981 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
10982 unsigned FrameReg = Subtarget->is64Bit() ? X86::RBP : X86::EBP;
10983 SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, FrameReg, VT);
10985 FrameAddr = DAG.getLoad(VT, dl, DAG.getEntryNode(), FrameAddr,
10986 MachinePointerInfo(),
10987 false, false, false, 0);
10991 SDValue X86TargetLowering::LowerFRAME_TO_ARGS_OFFSET(SDValue Op,
10992 SelectionDAG &DAG) const {
10993 return DAG.getIntPtrConstant(2 * RegInfo->getSlotSize());
10996 SDValue X86TargetLowering::LowerEH_RETURN(SDValue Op, SelectionDAG &DAG) const {
10997 SDValue Chain = Op.getOperand(0);
10998 SDValue Offset = Op.getOperand(1);
10999 SDValue Handler = Op.getOperand(2);
11000 DebugLoc dl = Op.getDebugLoc();
11002 SDValue Frame = DAG.getCopyFromReg(DAG.getEntryNode(), dl,
11003 Subtarget->is64Bit() ? X86::RBP : X86::EBP,
11005 unsigned StoreAddrReg = (Subtarget->is64Bit() ? X86::RCX : X86::ECX);
11007 SDValue StoreAddr = DAG.getNode(ISD::ADD, dl, getPointerTy(), Frame,
11008 DAG.getIntPtrConstant(RegInfo->getSlotSize()));
11009 StoreAddr = DAG.getNode(ISD::ADD, dl, getPointerTy(), StoreAddr, Offset);
11010 Chain = DAG.getStore(Chain, dl, Handler, StoreAddr, MachinePointerInfo(),
11012 Chain = DAG.getCopyToReg(Chain, dl, StoreAddrReg, StoreAddr);
11014 return DAG.getNode(X86ISD::EH_RETURN, dl,
11016 Chain, DAG.getRegister(StoreAddrReg, getPointerTy()));
11019 SDValue X86TargetLowering::lowerEH_SJLJ_SETJMP(SDValue Op,
11020 SelectionDAG &DAG) const {
11021 DebugLoc DL = Op.getDebugLoc();
11022 return DAG.getNode(X86ISD::EH_SJLJ_SETJMP, DL,
11023 DAG.getVTList(MVT::i32, MVT::Other),
11024 Op.getOperand(0), Op.getOperand(1));
11027 SDValue X86TargetLowering::lowerEH_SJLJ_LONGJMP(SDValue Op,
11028 SelectionDAG &DAG) const {
11029 DebugLoc DL = Op.getDebugLoc();
11030 return DAG.getNode(X86ISD::EH_SJLJ_LONGJMP, DL, MVT::Other,
11031 Op.getOperand(0), Op.getOperand(1));
11034 static SDValue LowerADJUST_TRAMPOLINE(SDValue Op, SelectionDAG &DAG) {
11035 return Op.getOperand(0);
11038 SDValue X86TargetLowering::LowerINIT_TRAMPOLINE(SDValue Op,
11039 SelectionDAG &DAG) const {
11040 SDValue Root = Op.getOperand(0);
11041 SDValue Trmp = Op.getOperand(1); // trampoline
11042 SDValue FPtr = Op.getOperand(2); // nested function
11043 SDValue Nest = Op.getOperand(3); // 'nest' parameter value
11044 DebugLoc dl = Op.getDebugLoc();
11046 const Value *TrmpAddr = cast<SrcValueSDNode>(Op.getOperand(4))->getValue();
11047 const TargetRegisterInfo* TRI = getTargetMachine().getRegisterInfo();
11049 if (Subtarget->is64Bit()) {
11050 SDValue OutChains[6];
11052 // Large code-model.
11053 const unsigned char JMP64r = 0xFF; // 64-bit jmp through register opcode.
11054 const unsigned char MOV64ri = 0xB8; // X86::MOV64ri opcode.
11056 const unsigned char N86R10 = TRI->getEncodingValue(X86::R10) & 0x7;
11057 const unsigned char N86R11 = TRI->getEncodingValue(X86::R11) & 0x7;
11059 const unsigned char REX_WB = 0x40 | 0x08 | 0x01; // REX prefix
11061 // Load the pointer to the nested function into R11.
11062 unsigned OpCode = ((MOV64ri | N86R11) << 8) | REX_WB; // movabsq r11
11063 SDValue Addr = Trmp;
11064 OutChains[0] = DAG.getStore(Root, dl, DAG.getConstant(OpCode, MVT::i16),
11065 Addr, MachinePointerInfo(TrmpAddr),
11068 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
11069 DAG.getConstant(2, MVT::i64));
11070 OutChains[1] = DAG.getStore(Root, dl, FPtr, Addr,
11071 MachinePointerInfo(TrmpAddr, 2),
11074 // Load the 'nest' parameter value into R10.
11075 // R10 is specified in X86CallingConv.td
11076 OpCode = ((MOV64ri | N86R10) << 8) | REX_WB; // movabsq r10
11077 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
11078 DAG.getConstant(10, MVT::i64));
11079 OutChains[2] = DAG.getStore(Root, dl, DAG.getConstant(OpCode, MVT::i16),
11080 Addr, MachinePointerInfo(TrmpAddr, 10),
11083 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
11084 DAG.getConstant(12, MVT::i64));
11085 OutChains[3] = DAG.getStore(Root, dl, Nest, Addr,
11086 MachinePointerInfo(TrmpAddr, 12),
11089 // Jump to the nested function.
11090 OpCode = (JMP64r << 8) | REX_WB; // jmpq *...
11091 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
11092 DAG.getConstant(20, MVT::i64));
11093 OutChains[4] = DAG.getStore(Root, dl, DAG.getConstant(OpCode, MVT::i16),
11094 Addr, MachinePointerInfo(TrmpAddr, 20),
11097 unsigned char ModRM = N86R11 | (4 << 3) | (3 << 6); // ...r11
11098 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
11099 DAG.getConstant(22, MVT::i64));
11100 OutChains[5] = DAG.getStore(Root, dl, DAG.getConstant(ModRM, MVT::i8), Addr,
11101 MachinePointerInfo(TrmpAddr, 22),
11104 return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, OutChains, 6);
11106 const Function *Func =
11107 cast<Function>(cast<SrcValueSDNode>(Op.getOperand(5))->getValue());
11108 CallingConv::ID CC = Func->getCallingConv();
11113 llvm_unreachable("Unsupported calling convention");
11114 case CallingConv::C:
11115 case CallingConv::X86_StdCall: {
11116 // Pass 'nest' parameter in ECX.
11117 // Must be kept in sync with X86CallingConv.td
11118 NestReg = X86::ECX;
11120 // Check that ECX wasn't needed by an 'inreg' parameter.
11121 FunctionType *FTy = Func->getFunctionType();
11122 const AttributeSet &Attrs = Func->getAttributes();
11124 if (!Attrs.isEmpty() && !Func->isVarArg()) {
11125 unsigned InRegCount = 0;
11128 for (FunctionType::param_iterator I = FTy->param_begin(),
11129 E = FTy->param_end(); I != E; ++I, ++Idx)
11130 if (Attrs.hasAttribute(Idx, Attribute::InReg))
11131 // FIXME: should only count parameters that are lowered to integers.
11132 InRegCount += (TD->getTypeSizeInBits(*I) + 31) / 32;
11134 if (InRegCount > 2) {
11135 report_fatal_error("Nest register in use - reduce number of inreg"
11141 case CallingConv::X86_FastCall:
11142 case CallingConv::X86_ThisCall:
11143 case CallingConv::Fast:
11144 // Pass 'nest' parameter in EAX.
11145 // Must be kept in sync with X86CallingConv.td
11146 NestReg = X86::EAX;
11150 SDValue OutChains[4];
11151 SDValue Addr, Disp;
11153 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
11154 DAG.getConstant(10, MVT::i32));
11155 Disp = DAG.getNode(ISD::SUB, dl, MVT::i32, FPtr, Addr);
11157 // This is storing the opcode for MOV32ri.
11158 const unsigned char MOV32ri = 0xB8; // X86::MOV32ri's opcode byte.
11159 const unsigned char N86Reg = TRI->getEncodingValue(NestReg) & 0x7;
11160 OutChains[0] = DAG.getStore(Root, dl,
11161 DAG.getConstant(MOV32ri|N86Reg, MVT::i8),
11162 Trmp, MachinePointerInfo(TrmpAddr),
11165 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
11166 DAG.getConstant(1, MVT::i32));
11167 OutChains[1] = DAG.getStore(Root, dl, Nest, Addr,
11168 MachinePointerInfo(TrmpAddr, 1),
11171 const unsigned char JMP = 0xE9; // jmp <32bit dst> opcode.
11172 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
11173 DAG.getConstant(5, MVT::i32));
11174 OutChains[2] = DAG.getStore(Root, dl, DAG.getConstant(JMP, MVT::i8), Addr,
11175 MachinePointerInfo(TrmpAddr, 5),
11178 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
11179 DAG.getConstant(6, MVT::i32));
11180 OutChains[3] = DAG.getStore(Root, dl, Disp, Addr,
11181 MachinePointerInfo(TrmpAddr, 6),
11184 return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, OutChains, 4);
11188 SDValue X86TargetLowering::LowerFLT_ROUNDS_(SDValue Op,
11189 SelectionDAG &DAG) const {
11191 The rounding mode is in bits 11:10 of FPSR, and has the following
11193 00 Round to nearest
11198 FLT_ROUNDS, on the other hand, expects the following:
11205 To perform the conversion, we do:
11206 (((((FPSR & 0x800) >> 11) | ((FPSR & 0x400) >> 9)) + 1) & 3)
11209 MachineFunction &MF = DAG.getMachineFunction();
11210 const TargetMachine &TM = MF.getTarget();
11211 const TargetFrameLowering &TFI = *TM.getFrameLowering();
11212 unsigned StackAlignment = TFI.getStackAlignment();
11213 EVT VT = Op.getValueType();
11214 DebugLoc DL = Op.getDebugLoc();
11216 // Save FP Control Word to stack slot
11217 int SSFI = MF.getFrameInfo()->CreateStackObject(2, StackAlignment, false);
11218 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
11220 MachineMemOperand *MMO =
11221 MF.getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
11222 MachineMemOperand::MOStore, 2, 2);
11224 SDValue Ops[] = { DAG.getEntryNode(), StackSlot };
11225 SDValue Chain = DAG.getMemIntrinsicNode(X86ISD::FNSTCW16m, DL,
11226 DAG.getVTList(MVT::Other),
11227 Ops, 2, MVT::i16, MMO);
11229 // Load FP Control Word from stack slot
11230 SDValue CWD = DAG.getLoad(MVT::i16, DL, Chain, StackSlot,
11231 MachinePointerInfo(), false, false, false, 0);
11233 // Transform as necessary
11235 DAG.getNode(ISD::SRL, DL, MVT::i16,
11236 DAG.getNode(ISD::AND, DL, MVT::i16,
11237 CWD, DAG.getConstant(0x800, MVT::i16)),
11238 DAG.getConstant(11, MVT::i8));
11240 DAG.getNode(ISD::SRL, DL, MVT::i16,
11241 DAG.getNode(ISD::AND, DL, MVT::i16,
11242 CWD, DAG.getConstant(0x400, MVT::i16)),
11243 DAG.getConstant(9, MVT::i8));
11246 DAG.getNode(ISD::AND, DL, MVT::i16,
11247 DAG.getNode(ISD::ADD, DL, MVT::i16,
11248 DAG.getNode(ISD::OR, DL, MVT::i16, CWD1, CWD2),
11249 DAG.getConstant(1, MVT::i16)),
11250 DAG.getConstant(3, MVT::i16));
11252 return DAG.getNode((VT.getSizeInBits() < 16 ?
11253 ISD::TRUNCATE : ISD::ZERO_EXTEND), DL, VT, RetVal);
11256 static SDValue LowerCTLZ(SDValue Op, SelectionDAG &DAG) {
11257 EVT VT = Op.getValueType();
11259 unsigned NumBits = VT.getSizeInBits();
11260 DebugLoc dl = Op.getDebugLoc();
11262 Op = Op.getOperand(0);
11263 if (VT == MVT::i8) {
11264 // Zero extend to i32 since there is not an i8 bsr.
11266 Op = DAG.getNode(ISD::ZERO_EXTEND, dl, OpVT, Op);
11269 // Issue a bsr (scan bits in reverse) which also sets EFLAGS.
11270 SDVTList VTs = DAG.getVTList(OpVT, MVT::i32);
11271 Op = DAG.getNode(X86ISD::BSR, dl, VTs, Op);
11273 // If src is zero (i.e. bsr sets ZF), returns NumBits.
11276 DAG.getConstant(NumBits+NumBits-1, OpVT),
11277 DAG.getConstant(X86::COND_E, MVT::i8),
11280 Op = DAG.getNode(X86ISD::CMOV, dl, OpVT, Ops, array_lengthof(Ops));
11282 // Finally xor with NumBits-1.
11283 Op = DAG.getNode(ISD::XOR, dl, OpVT, Op, DAG.getConstant(NumBits-1, OpVT));
11286 Op = DAG.getNode(ISD::TRUNCATE, dl, MVT::i8, Op);
11290 static SDValue LowerCTLZ_ZERO_UNDEF(SDValue Op, SelectionDAG &DAG) {
11291 EVT VT = Op.getValueType();
11293 unsigned NumBits = VT.getSizeInBits();
11294 DebugLoc dl = Op.getDebugLoc();
11296 Op = Op.getOperand(0);
11297 if (VT == MVT::i8) {
11298 // Zero extend to i32 since there is not an i8 bsr.
11300 Op = DAG.getNode(ISD::ZERO_EXTEND, dl, OpVT, Op);
11303 // Issue a bsr (scan bits in reverse).
11304 SDVTList VTs = DAG.getVTList(OpVT, MVT::i32);
11305 Op = DAG.getNode(X86ISD::BSR, dl, VTs, Op);
11307 // And xor with NumBits-1.
11308 Op = DAG.getNode(ISD::XOR, dl, OpVT, Op, DAG.getConstant(NumBits-1, OpVT));
11311 Op = DAG.getNode(ISD::TRUNCATE, dl, MVT::i8, Op);
11315 static SDValue LowerCTTZ(SDValue Op, SelectionDAG &DAG) {
11316 EVT VT = Op.getValueType();
11317 unsigned NumBits = VT.getSizeInBits();
11318 DebugLoc dl = Op.getDebugLoc();
11319 Op = Op.getOperand(0);
11321 // Issue a bsf (scan bits forward) which also sets EFLAGS.
11322 SDVTList VTs = DAG.getVTList(VT, MVT::i32);
11323 Op = DAG.getNode(X86ISD::BSF, dl, VTs, Op);
11325 // If src is zero (i.e. bsf sets ZF), returns NumBits.
11328 DAG.getConstant(NumBits, VT),
11329 DAG.getConstant(X86::COND_E, MVT::i8),
11332 return DAG.getNode(X86ISD::CMOV, dl, VT, Ops, array_lengthof(Ops));
11335 // Lower256IntArith - Break a 256-bit integer operation into two new 128-bit
11336 // ones, and then concatenate the result back.
11337 static SDValue Lower256IntArith(SDValue Op, SelectionDAG &DAG) {
11338 EVT VT = Op.getValueType();
11340 assert(VT.is256BitVector() && VT.isInteger() &&
11341 "Unsupported value type for operation");
11343 unsigned NumElems = VT.getVectorNumElements();
11344 DebugLoc dl = Op.getDebugLoc();
11346 // Extract the LHS vectors
11347 SDValue LHS = Op.getOperand(0);
11348 SDValue LHS1 = Extract128BitVector(LHS, 0, DAG, dl);
11349 SDValue LHS2 = Extract128BitVector(LHS, NumElems/2, DAG, dl);
11351 // Extract the RHS vectors
11352 SDValue RHS = Op.getOperand(1);
11353 SDValue RHS1 = Extract128BitVector(RHS, 0, DAG, dl);
11354 SDValue RHS2 = Extract128BitVector(RHS, NumElems/2, DAG, dl);
11356 MVT EltVT = VT.getVectorElementType().getSimpleVT();
11357 EVT NewVT = MVT::getVectorVT(EltVT, NumElems/2);
11359 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT,
11360 DAG.getNode(Op.getOpcode(), dl, NewVT, LHS1, RHS1),
11361 DAG.getNode(Op.getOpcode(), dl, NewVT, LHS2, RHS2));
11364 static SDValue LowerADD(SDValue Op, SelectionDAG &DAG) {
11365 assert(Op.getValueType().is256BitVector() &&
11366 Op.getValueType().isInteger() &&
11367 "Only handle AVX 256-bit vector integer operation");
11368 return Lower256IntArith(Op, DAG);
11371 static SDValue LowerSUB(SDValue Op, SelectionDAG &DAG) {
11372 assert(Op.getValueType().is256BitVector() &&
11373 Op.getValueType().isInteger() &&
11374 "Only handle AVX 256-bit vector integer operation");
11375 return Lower256IntArith(Op, DAG);
11378 static SDValue LowerMUL(SDValue Op, const X86Subtarget *Subtarget,
11379 SelectionDAG &DAG) {
11380 DebugLoc dl = Op.getDebugLoc();
11381 EVT VT = Op.getValueType();
11383 // Decompose 256-bit ops into smaller 128-bit ops.
11384 if (VT.is256BitVector() && !Subtarget->hasInt256())
11385 return Lower256IntArith(Op, DAG);
11387 SDValue A = Op.getOperand(0);
11388 SDValue B = Op.getOperand(1);
11390 // Lower v4i32 mul as 2x shuffle, 2x pmuludq, 2x shuffle.
11391 if (VT == MVT::v4i32) {
11392 assert(Subtarget->hasSSE2() && !Subtarget->hasSSE41() &&
11393 "Should not custom lower when pmuldq is available!");
11395 // Extract the odd parts.
11396 const int UnpackMask[] = { 1, -1, 3, -1 };
11397 SDValue Aodds = DAG.getVectorShuffle(VT, dl, A, A, UnpackMask);
11398 SDValue Bodds = DAG.getVectorShuffle(VT, dl, B, B, UnpackMask);
11400 // Multiply the even parts.
11401 SDValue Evens = DAG.getNode(X86ISD::PMULUDQ, dl, MVT::v2i64, A, B);
11402 // Now multiply odd parts.
11403 SDValue Odds = DAG.getNode(X86ISD::PMULUDQ, dl, MVT::v2i64, Aodds, Bodds);
11405 Evens = DAG.getNode(ISD::BITCAST, dl, VT, Evens);
11406 Odds = DAG.getNode(ISD::BITCAST, dl, VT, Odds);
11408 // Merge the two vectors back together with a shuffle. This expands into 2
11410 const int ShufMask[] = { 0, 4, 2, 6 };
11411 return DAG.getVectorShuffle(VT, dl, Evens, Odds, ShufMask);
11414 assert((VT == MVT::v2i64 || VT == MVT::v4i64) &&
11415 "Only know how to lower V2I64/V4I64 multiply");
11417 // Ahi = psrlqi(a, 32);
11418 // Bhi = psrlqi(b, 32);
11420 // AloBlo = pmuludq(a, b);
11421 // AloBhi = pmuludq(a, Bhi);
11422 // AhiBlo = pmuludq(Ahi, b);
11424 // AloBhi = psllqi(AloBhi, 32);
11425 // AhiBlo = psllqi(AhiBlo, 32);
11426 // return AloBlo + AloBhi + AhiBlo;
11428 SDValue ShAmt = DAG.getConstant(32, MVT::i32);
11430 SDValue Ahi = DAG.getNode(X86ISD::VSRLI, dl, VT, A, ShAmt);
11431 SDValue Bhi = DAG.getNode(X86ISD::VSRLI, dl, VT, B, ShAmt);
11433 // Bit cast to 32-bit vectors for MULUDQ
11434 EVT MulVT = (VT == MVT::v2i64) ? MVT::v4i32 : MVT::v8i32;
11435 A = DAG.getNode(ISD::BITCAST, dl, MulVT, A);
11436 B = DAG.getNode(ISD::BITCAST, dl, MulVT, B);
11437 Ahi = DAG.getNode(ISD::BITCAST, dl, MulVT, Ahi);
11438 Bhi = DAG.getNode(ISD::BITCAST, dl, MulVT, Bhi);
11440 SDValue AloBlo = DAG.getNode(X86ISD::PMULUDQ, dl, VT, A, B);
11441 SDValue AloBhi = DAG.getNode(X86ISD::PMULUDQ, dl, VT, A, Bhi);
11442 SDValue AhiBlo = DAG.getNode(X86ISD::PMULUDQ, dl, VT, Ahi, B);
11444 AloBhi = DAG.getNode(X86ISD::VSHLI, dl, VT, AloBhi, ShAmt);
11445 AhiBlo = DAG.getNode(X86ISD::VSHLI, dl, VT, AhiBlo, ShAmt);
11447 SDValue Res = DAG.getNode(ISD::ADD, dl, VT, AloBlo, AloBhi);
11448 return DAG.getNode(ISD::ADD, dl, VT, Res, AhiBlo);
11451 SDValue X86TargetLowering::LowerSDIV(SDValue Op, SelectionDAG &DAG) const {
11452 EVT VT = Op.getValueType();
11453 EVT EltTy = VT.getVectorElementType();
11454 unsigned NumElts = VT.getVectorNumElements();
11455 SDValue N0 = Op.getOperand(0);
11456 DebugLoc dl = Op.getDebugLoc();
11458 // Lower sdiv X, pow2-const.
11459 BuildVectorSDNode *C = dyn_cast<BuildVectorSDNode>(Op.getOperand(1));
11463 APInt SplatValue, SplatUndef;
11464 unsigned MinSplatBits;
11466 if (!C->isConstantSplat(SplatValue, SplatUndef, MinSplatBits, HasAnyUndefs))
11469 if ((SplatValue != 0) &&
11470 (SplatValue.isPowerOf2() || (-SplatValue).isPowerOf2())) {
11471 unsigned lg2 = SplatValue.countTrailingZeros();
11472 // Splat the sign bit.
11473 SDValue Sz = DAG.getConstant(EltTy.getSizeInBits()-1, MVT::i32);
11474 SDValue SGN = getTargetVShiftNode(X86ISD::VSRAI, dl, VT, N0, Sz, DAG);
11475 // Add (N0 < 0) ? abs2 - 1 : 0;
11476 SDValue Amt = DAG.getConstant(EltTy.getSizeInBits() - lg2, MVT::i32);
11477 SDValue SRL = getTargetVShiftNode(X86ISD::VSRLI, dl, VT, SGN, Amt, DAG);
11478 SDValue ADD = DAG.getNode(ISD::ADD, dl, VT, N0, SRL);
11479 SDValue Lg2Amt = DAG.getConstant(lg2, MVT::i32);
11480 SDValue SRA = getTargetVShiftNode(X86ISD::VSRAI, dl, VT, ADD, Lg2Amt, DAG);
11482 // If we're dividing by a positive value, we're done. Otherwise, we must
11483 // negate the result.
11484 if (SplatValue.isNonNegative())
11487 SmallVector<SDValue, 16> V(NumElts, DAG.getConstant(0, EltTy));
11488 SDValue Zero = DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &V[0], NumElts);
11489 return DAG.getNode(ISD::SUB, dl, VT, Zero, SRA);
11494 SDValue X86TargetLowering::LowerShift(SDValue Op, SelectionDAG &DAG) const {
11496 EVT VT = Op.getValueType();
11497 DebugLoc dl = Op.getDebugLoc();
11498 SDValue R = Op.getOperand(0);
11499 SDValue Amt = Op.getOperand(1);
11501 if (!Subtarget->hasSSE2())
11504 // Optimize shl/srl/sra with constant shift amount.
11505 if (isSplatVector(Amt.getNode())) {
11506 SDValue SclrAmt = Amt->getOperand(0);
11507 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(SclrAmt)) {
11508 uint64_t ShiftAmt = C->getZExtValue();
11510 if (VT == MVT::v2i64 || VT == MVT::v4i32 || VT == MVT::v8i16 ||
11511 (Subtarget->hasInt256() &&
11512 (VT == MVT::v4i64 || VT == MVT::v8i32 || VT == MVT::v16i16))) {
11513 if (Op.getOpcode() == ISD::SHL)
11514 return DAG.getNode(X86ISD::VSHLI, dl, VT, R,
11515 DAG.getConstant(ShiftAmt, MVT::i32));
11516 if (Op.getOpcode() == ISD::SRL)
11517 return DAG.getNode(X86ISD::VSRLI, dl, VT, R,
11518 DAG.getConstant(ShiftAmt, MVT::i32));
11519 if (Op.getOpcode() == ISD::SRA && VT != MVT::v2i64 && VT != MVT::v4i64)
11520 return DAG.getNode(X86ISD::VSRAI, dl, VT, R,
11521 DAG.getConstant(ShiftAmt, MVT::i32));
11524 if (VT == MVT::v16i8) {
11525 if (Op.getOpcode() == ISD::SHL) {
11526 // Make a large shift.
11527 SDValue SHL = DAG.getNode(X86ISD::VSHLI, dl, MVT::v8i16, R,
11528 DAG.getConstant(ShiftAmt, MVT::i32));
11529 SHL = DAG.getNode(ISD::BITCAST, dl, VT, SHL);
11530 // Zero out the rightmost bits.
11531 SmallVector<SDValue, 16> V(16,
11532 DAG.getConstant(uint8_t(-1U << ShiftAmt),
11534 return DAG.getNode(ISD::AND, dl, VT, SHL,
11535 DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &V[0], 16));
11537 if (Op.getOpcode() == ISD::SRL) {
11538 // Make a large shift.
11539 SDValue SRL = DAG.getNode(X86ISD::VSRLI, dl, MVT::v8i16, R,
11540 DAG.getConstant(ShiftAmt, MVT::i32));
11541 SRL = DAG.getNode(ISD::BITCAST, dl, VT, SRL);
11542 // Zero out the leftmost bits.
11543 SmallVector<SDValue, 16> V(16,
11544 DAG.getConstant(uint8_t(-1U) >> ShiftAmt,
11546 return DAG.getNode(ISD::AND, dl, VT, SRL,
11547 DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &V[0], 16));
11549 if (Op.getOpcode() == ISD::SRA) {
11550 if (ShiftAmt == 7) {
11551 // R s>> 7 === R s< 0
11552 SDValue Zeros = getZeroVector(VT, Subtarget, DAG, dl);
11553 return DAG.getNode(X86ISD::PCMPGT, dl, VT, Zeros, R);
11556 // R s>> a === ((R u>> a) ^ m) - m
11557 SDValue Res = DAG.getNode(ISD::SRL, dl, VT, R, Amt);
11558 SmallVector<SDValue, 16> V(16, DAG.getConstant(128 >> ShiftAmt,
11560 SDValue Mask = DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &V[0], 16);
11561 Res = DAG.getNode(ISD::XOR, dl, VT, Res, Mask);
11562 Res = DAG.getNode(ISD::SUB, dl, VT, Res, Mask);
11565 llvm_unreachable("Unknown shift opcode.");
11568 if (Subtarget->hasInt256() && VT == MVT::v32i8) {
11569 if (Op.getOpcode() == ISD::SHL) {
11570 // Make a large shift.
11571 SDValue SHL = DAG.getNode(X86ISD::VSHLI, dl, MVT::v16i16, R,
11572 DAG.getConstant(ShiftAmt, MVT::i32));
11573 SHL = DAG.getNode(ISD::BITCAST, dl, VT, SHL);
11574 // Zero out the rightmost bits.
11575 SmallVector<SDValue, 32> V(32,
11576 DAG.getConstant(uint8_t(-1U << ShiftAmt),
11578 return DAG.getNode(ISD::AND, dl, VT, SHL,
11579 DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &V[0], 32));
11581 if (Op.getOpcode() == ISD::SRL) {
11582 // Make a large shift.
11583 SDValue SRL = DAG.getNode(X86ISD::VSRLI, dl, MVT::v16i16, R,
11584 DAG.getConstant(ShiftAmt, MVT::i32));
11585 SRL = DAG.getNode(ISD::BITCAST, dl, VT, SRL);
11586 // Zero out the leftmost bits.
11587 SmallVector<SDValue, 32> V(32,
11588 DAG.getConstant(uint8_t(-1U) >> ShiftAmt,
11590 return DAG.getNode(ISD::AND, dl, VT, SRL,
11591 DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &V[0], 32));
11593 if (Op.getOpcode() == ISD::SRA) {
11594 if (ShiftAmt == 7) {
11595 // R s>> 7 === R s< 0
11596 SDValue Zeros = getZeroVector(VT, Subtarget, DAG, dl);
11597 return DAG.getNode(X86ISD::PCMPGT, dl, VT, Zeros, R);
11600 // R s>> a === ((R u>> a) ^ m) - m
11601 SDValue Res = DAG.getNode(ISD::SRL, dl, VT, R, Amt);
11602 SmallVector<SDValue, 32> V(32, DAG.getConstant(128 >> ShiftAmt,
11604 SDValue Mask = DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &V[0], 32);
11605 Res = DAG.getNode(ISD::XOR, dl, VT, Res, Mask);
11606 Res = DAG.getNode(ISD::SUB, dl, VT, Res, Mask);
11609 llvm_unreachable("Unknown shift opcode.");
11614 // Lower SHL with variable shift amount.
11615 if (VT == MVT::v4i32 && Op->getOpcode() == ISD::SHL) {
11616 Op = DAG.getNode(ISD::SHL, dl, VT, Amt, DAG.getConstant(23, VT));
11618 Op = DAG.getNode(ISD::ADD, dl, VT, Op, DAG.getConstant(0x3f800000U, VT));
11619 Op = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, Op);
11620 Op = DAG.getNode(ISD::FP_TO_SINT, dl, VT, Op);
11621 return DAG.getNode(ISD::MUL, dl, VT, Op, R);
11623 if (VT == MVT::v16i8 && Op->getOpcode() == ISD::SHL) {
11624 assert(Subtarget->hasSSE2() && "Need SSE2 for pslli/pcmpeq.");
11627 Op = DAG.getNode(ISD::SHL, dl, VT, Amt, DAG.getConstant(5, VT));
11628 Op = DAG.getNode(ISD::BITCAST, dl, VT, Op);
11630 // Turn 'a' into a mask suitable for VSELECT
11631 SDValue VSelM = DAG.getConstant(0x80, VT);
11632 SDValue OpVSel = DAG.getNode(ISD::AND, dl, VT, VSelM, Op);
11633 OpVSel = DAG.getNode(X86ISD::PCMPEQ, dl, VT, OpVSel, VSelM);
11635 SDValue CM1 = DAG.getConstant(0x0f, VT);
11636 SDValue CM2 = DAG.getConstant(0x3f, VT);
11638 // r = VSELECT(r, psllw(r & (char16)15, 4), a);
11639 SDValue M = DAG.getNode(ISD::AND, dl, VT, R, CM1);
11640 M = getTargetVShiftNode(X86ISD::VSHLI, dl, MVT::v8i16, M,
11641 DAG.getConstant(4, MVT::i32), DAG);
11642 M = DAG.getNode(ISD::BITCAST, dl, VT, M);
11643 R = DAG.getNode(ISD::VSELECT, dl, VT, OpVSel, M, R);
11646 Op = DAG.getNode(ISD::ADD, dl, VT, Op, Op);
11647 OpVSel = DAG.getNode(ISD::AND, dl, VT, VSelM, Op);
11648 OpVSel = DAG.getNode(X86ISD::PCMPEQ, dl, VT, OpVSel, VSelM);
11650 // r = VSELECT(r, psllw(r & (char16)63, 2), a);
11651 M = DAG.getNode(ISD::AND, dl, VT, R, CM2);
11652 M = getTargetVShiftNode(X86ISD::VSHLI, dl, MVT::v8i16, M,
11653 DAG.getConstant(2, MVT::i32), DAG);
11654 M = DAG.getNode(ISD::BITCAST, dl, VT, M);
11655 R = DAG.getNode(ISD::VSELECT, dl, VT, OpVSel, M, R);
11658 Op = DAG.getNode(ISD::ADD, dl, VT, Op, Op);
11659 OpVSel = DAG.getNode(ISD::AND, dl, VT, VSelM, Op);
11660 OpVSel = DAG.getNode(X86ISD::PCMPEQ, dl, VT, OpVSel, VSelM);
11662 // return VSELECT(r, r+r, a);
11663 R = DAG.getNode(ISD::VSELECT, dl, VT, OpVSel,
11664 DAG.getNode(ISD::ADD, dl, VT, R, R), R);
11668 // Decompose 256-bit shifts into smaller 128-bit shifts.
11669 if (VT.is256BitVector()) {
11670 unsigned NumElems = VT.getVectorNumElements();
11671 MVT EltVT = VT.getVectorElementType().getSimpleVT();
11672 EVT NewVT = MVT::getVectorVT(EltVT, NumElems/2);
11674 // Extract the two vectors
11675 SDValue V1 = Extract128BitVector(R, 0, DAG, dl);
11676 SDValue V2 = Extract128BitVector(R, NumElems/2, DAG, dl);
11678 // Recreate the shift amount vectors
11679 SDValue Amt1, Amt2;
11680 if (Amt.getOpcode() == ISD::BUILD_VECTOR) {
11681 // Constant shift amount
11682 SmallVector<SDValue, 4> Amt1Csts;
11683 SmallVector<SDValue, 4> Amt2Csts;
11684 for (unsigned i = 0; i != NumElems/2; ++i)
11685 Amt1Csts.push_back(Amt->getOperand(i));
11686 for (unsigned i = NumElems/2; i != NumElems; ++i)
11687 Amt2Csts.push_back(Amt->getOperand(i));
11689 Amt1 = DAG.getNode(ISD::BUILD_VECTOR, dl, NewVT,
11690 &Amt1Csts[0], NumElems/2);
11691 Amt2 = DAG.getNode(ISD::BUILD_VECTOR, dl, NewVT,
11692 &Amt2Csts[0], NumElems/2);
11694 // Variable shift amount
11695 Amt1 = Extract128BitVector(Amt, 0, DAG, dl);
11696 Amt2 = Extract128BitVector(Amt, NumElems/2, DAG, dl);
11699 // Issue new vector shifts for the smaller types
11700 V1 = DAG.getNode(Op.getOpcode(), dl, NewVT, V1, Amt1);
11701 V2 = DAG.getNode(Op.getOpcode(), dl, NewVT, V2, Amt2);
11703 // Concatenate the result back
11704 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, V1, V2);
11710 static SDValue LowerXALUO(SDValue Op, SelectionDAG &DAG) {
11711 // Lower the "add/sub/mul with overflow" instruction into a regular ins plus
11712 // a "setcc" instruction that checks the overflow flag. The "brcond" lowering
11713 // looks for this combo and may remove the "setcc" instruction if the "setcc"
11714 // has only one use.
11715 SDNode *N = Op.getNode();
11716 SDValue LHS = N->getOperand(0);
11717 SDValue RHS = N->getOperand(1);
11718 unsigned BaseOp = 0;
11720 DebugLoc DL = Op.getDebugLoc();
11721 switch (Op.getOpcode()) {
11722 default: llvm_unreachable("Unknown ovf instruction!");
11724 // A subtract of one will be selected as a INC. Note that INC doesn't
11725 // set CF, so we can't do this for UADDO.
11726 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(RHS))
11728 BaseOp = X86ISD::INC;
11729 Cond = X86::COND_O;
11732 BaseOp = X86ISD::ADD;
11733 Cond = X86::COND_O;
11736 BaseOp = X86ISD::ADD;
11737 Cond = X86::COND_B;
11740 // A subtract of one will be selected as a DEC. Note that DEC doesn't
11741 // set CF, so we can't do this for USUBO.
11742 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(RHS))
11744 BaseOp = X86ISD::DEC;
11745 Cond = X86::COND_O;
11748 BaseOp = X86ISD::SUB;
11749 Cond = X86::COND_O;
11752 BaseOp = X86ISD::SUB;
11753 Cond = X86::COND_B;
11756 BaseOp = X86ISD::SMUL;
11757 Cond = X86::COND_O;
11759 case ISD::UMULO: { // i64, i8 = umulo lhs, rhs --> i64, i64, i32 umul lhs,rhs
11760 SDVTList VTs = DAG.getVTList(N->getValueType(0), N->getValueType(0),
11762 SDValue Sum = DAG.getNode(X86ISD::UMUL, DL, VTs, LHS, RHS);
11765 DAG.getNode(X86ISD::SETCC, DL, MVT::i8,
11766 DAG.getConstant(X86::COND_O, MVT::i32),
11767 SDValue(Sum.getNode(), 2));
11769 return DAG.getNode(ISD::MERGE_VALUES, DL, N->getVTList(), Sum, SetCC);
11773 // Also sets EFLAGS.
11774 SDVTList VTs = DAG.getVTList(N->getValueType(0), MVT::i32);
11775 SDValue Sum = DAG.getNode(BaseOp, DL, VTs, LHS, RHS);
11778 DAG.getNode(X86ISD::SETCC, DL, N->getValueType(1),
11779 DAG.getConstant(Cond, MVT::i32),
11780 SDValue(Sum.getNode(), 1));
11782 return DAG.getNode(ISD::MERGE_VALUES, DL, N->getVTList(), Sum, SetCC);
11785 SDValue X86TargetLowering::LowerSIGN_EXTEND_INREG(SDValue Op,
11786 SelectionDAG &DAG) const {
11787 DebugLoc dl = Op.getDebugLoc();
11788 EVT ExtraVT = cast<VTSDNode>(Op.getOperand(1))->getVT();
11789 EVT VT = Op.getValueType();
11791 if (!Subtarget->hasSSE2() || !VT.isVector())
11794 unsigned BitsDiff = VT.getScalarType().getSizeInBits() -
11795 ExtraVT.getScalarType().getSizeInBits();
11796 SDValue ShAmt = DAG.getConstant(BitsDiff, MVT::i32);
11798 switch (VT.getSimpleVT().SimpleTy) {
11799 default: return SDValue();
11802 if (!Subtarget->hasFp256())
11804 if (!Subtarget->hasInt256()) {
11805 // needs to be split
11806 unsigned NumElems = VT.getVectorNumElements();
11808 // Extract the LHS vectors
11809 SDValue LHS = Op.getOperand(0);
11810 SDValue LHS1 = Extract128BitVector(LHS, 0, DAG, dl);
11811 SDValue LHS2 = Extract128BitVector(LHS, NumElems/2, DAG, dl);
11813 MVT EltVT = VT.getVectorElementType().getSimpleVT();
11814 EVT NewVT = MVT::getVectorVT(EltVT, NumElems/2);
11816 EVT ExtraEltVT = ExtraVT.getVectorElementType();
11817 unsigned ExtraNumElems = ExtraVT.getVectorNumElements();
11818 ExtraVT = EVT::getVectorVT(*DAG.getContext(), ExtraEltVT,
11820 SDValue Extra = DAG.getValueType(ExtraVT);
11822 LHS1 = DAG.getNode(Op.getOpcode(), dl, NewVT, LHS1, Extra);
11823 LHS2 = DAG.getNode(Op.getOpcode(), dl, NewVT, LHS2, Extra);
11825 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, LHS1, LHS2);
11830 // (sext (vzext x)) -> (vsext x)
11831 SDValue Op0 = Op.getOperand(0);
11832 SDValue Op00 = Op0.getOperand(0);
11834 // Hopefully, this VECTOR_SHUFFLE is just a VZEXT.
11835 if (Op0.getOpcode() == ISD::BITCAST &&
11836 Op00.getOpcode() == ISD::VECTOR_SHUFFLE)
11837 Tmp1 = LowerVectorIntExtend(Op00, DAG);
11838 if (Tmp1.getNode()) {
11839 SDValue Tmp1Op0 = Tmp1.getOperand(0);
11840 assert(Tmp1Op0.getOpcode() == X86ISD::VZEXT &&
11841 "This optimization is invalid without a VZEXT.");
11842 return DAG.getNode(X86ISD::VSEXT, dl, VT, Tmp1Op0.getOperand(0));
11845 // If the above didn't work, then just use Shift-Left + Shift-Right.
11846 Tmp1 = getTargetVShiftNode(X86ISD::VSHLI, dl, VT, Op0, ShAmt, DAG);
11847 return getTargetVShiftNode(X86ISD::VSRAI, dl, VT, Tmp1, ShAmt, DAG);
11852 static SDValue LowerMEMBARRIER(SDValue Op, const X86Subtarget *Subtarget,
11853 SelectionDAG &DAG) {
11854 DebugLoc dl = Op.getDebugLoc();
11856 // Go ahead and emit the fence on x86-64 even if we asked for no-sse2.
11857 // There isn't any reason to disable it if the target processor supports it.
11858 if (!Subtarget->hasSSE2() && !Subtarget->is64Bit()) {
11859 SDValue Chain = Op.getOperand(0);
11860 SDValue Zero = DAG.getConstant(0, MVT::i32);
11862 DAG.getRegister(X86::ESP, MVT::i32), // Base
11863 DAG.getTargetConstant(1, MVT::i8), // Scale
11864 DAG.getRegister(0, MVT::i32), // Index
11865 DAG.getTargetConstant(0, MVT::i32), // Disp
11866 DAG.getRegister(0, MVT::i32), // Segment.
11871 DAG.getMachineNode(X86::OR32mrLocked, dl, MVT::Other, Ops,
11872 array_lengthof(Ops));
11873 return SDValue(Res, 0);
11876 unsigned isDev = cast<ConstantSDNode>(Op.getOperand(5))->getZExtValue();
11878 return DAG.getNode(X86ISD::MEMBARRIER, dl, MVT::Other, Op.getOperand(0));
11880 unsigned Op1 = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
11881 unsigned Op2 = cast<ConstantSDNode>(Op.getOperand(2))->getZExtValue();
11882 unsigned Op3 = cast<ConstantSDNode>(Op.getOperand(3))->getZExtValue();
11883 unsigned Op4 = cast<ConstantSDNode>(Op.getOperand(4))->getZExtValue();
11885 // def : Pat<(membarrier (i8 0), (i8 0), (i8 0), (i8 1), (i8 1)), (SFENCE)>;
11886 if (!Op1 && !Op2 && !Op3 && Op4)
11887 return DAG.getNode(X86ISD::SFENCE, dl, MVT::Other, Op.getOperand(0));
11889 // def : Pat<(membarrier (i8 1), (i8 0), (i8 0), (i8 0), (i8 1)), (LFENCE)>;
11890 if (Op1 && !Op2 && !Op3 && !Op4)
11891 return DAG.getNode(X86ISD::LFENCE, dl, MVT::Other, Op.getOperand(0));
11893 // def : Pat<(membarrier (i8 imm), (i8 imm), (i8 imm), (i8 imm), (i8 1)),
11895 return DAG.getNode(X86ISD::MFENCE, dl, MVT::Other, Op.getOperand(0));
11898 static SDValue LowerATOMIC_FENCE(SDValue Op, const X86Subtarget *Subtarget,
11899 SelectionDAG &DAG) {
11900 DebugLoc dl = Op.getDebugLoc();
11901 AtomicOrdering FenceOrdering = static_cast<AtomicOrdering>(
11902 cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue());
11903 SynchronizationScope FenceScope = static_cast<SynchronizationScope>(
11904 cast<ConstantSDNode>(Op.getOperand(2))->getZExtValue());
11906 // The only fence that needs an instruction is a sequentially-consistent
11907 // cross-thread fence.
11908 if (FenceOrdering == SequentiallyConsistent && FenceScope == CrossThread) {
11909 // Use mfence if we have SSE2 or we're on x86-64 (even if we asked for
11910 // no-sse2). There isn't any reason to disable it if the target processor
11912 if (Subtarget->hasSSE2() || Subtarget->is64Bit())
11913 return DAG.getNode(X86ISD::MFENCE, dl, MVT::Other, Op.getOperand(0));
11915 SDValue Chain = Op.getOperand(0);
11916 SDValue Zero = DAG.getConstant(0, MVT::i32);
11918 DAG.getRegister(X86::ESP, MVT::i32), // Base
11919 DAG.getTargetConstant(1, MVT::i8), // Scale
11920 DAG.getRegister(0, MVT::i32), // Index
11921 DAG.getTargetConstant(0, MVT::i32), // Disp
11922 DAG.getRegister(0, MVT::i32), // Segment.
11927 DAG.getMachineNode(X86::OR32mrLocked, dl, MVT::Other, Ops,
11928 array_lengthof(Ops));
11929 return SDValue(Res, 0);
11932 // MEMBARRIER is a compiler barrier; it codegens to a no-op.
11933 return DAG.getNode(X86ISD::MEMBARRIER, dl, MVT::Other, Op.getOperand(0));
11936 static SDValue LowerCMP_SWAP(SDValue Op, const X86Subtarget *Subtarget,
11937 SelectionDAG &DAG) {
11938 EVT T = Op.getValueType();
11939 DebugLoc DL = Op.getDebugLoc();
11942 switch(T.getSimpleVT().SimpleTy) {
11943 default: llvm_unreachable("Invalid value type!");
11944 case MVT::i8: Reg = X86::AL; size = 1; break;
11945 case MVT::i16: Reg = X86::AX; size = 2; break;
11946 case MVT::i32: Reg = X86::EAX; size = 4; break;
11948 assert(Subtarget->is64Bit() && "Node not type legal!");
11949 Reg = X86::RAX; size = 8;
11952 SDValue cpIn = DAG.getCopyToReg(Op.getOperand(0), DL, Reg,
11953 Op.getOperand(2), SDValue());
11954 SDValue Ops[] = { cpIn.getValue(0),
11957 DAG.getTargetConstant(size, MVT::i8),
11958 cpIn.getValue(1) };
11959 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Glue);
11960 MachineMemOperand *MMO = cast<AtomicSDNode>(Op)->getMemOperand();
11961 SDValue Result = DAG.getMemIntrinsicNode(X86ISD::LCMPXCHG_DAG, DL, Tys,
11964 DAG.getCopyFromReg(Result.getValue(0), DL, Reg, T, Result.getValue(1));
11968 static SDValue LowerREADCYCLECOUNTER(SDValue Op, const X86Subtarget *Subtarget,
11969 SelectionDAG &DAG) {
11970 assert(Subtarget->is64Bit() && "Result not type legalized?");
11971 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Glue);
11972 SDValue TheChain = Op.getOperand(0);
11973 DebugLoc dl = Op.getDebugLoc();
11974 SDValue rd = DAG.getNode(X86ISD::RDTSC_DAG, dl, Tys, &TheChain, 1);
11975 SDValue rax = DAG.getCopyFromReg(rd, dl, X86::RAX, MVT::i64, rd.getValue(1));
11976 SDValue rdx = DAG.getCopyFromReg(rax.getValue(1), dl, X86::RDX, MVT::i64,
11978 SDValue Tmp = DAG.getNode(ISD::SHL, dl, MVT::i64, rdx,
11979 DAG.getConstant(32, MVT::i8));
11981 DAG.getNode(ISD::OR, dl, MVT::i64, rax, Tmp),
11984 return DAG.getMergeValues(Ops, 2, dl);
11987 SDValue X86TargetLowering::LowerBITCAST(SDValue Op, SelectionDAG &DAG) const {
11988 EVT SrcVT = Op.getOperand(0).getValueType();
11989 EVT DstVT = Op.getValueType();
11990 assert(Subtarget->is64Bit() && !Subtarget->hasSSE2() &&
11991 Subtarget->hasMMX() && "Unexpected custom BITCAST");
11992 assert((DstVT == MVT::i64 ||
11993 (DstVT.isVector() && DstVT.getSizeInBits()==64)) &&
11994 "Unexpected custom BITCAST");
11995 // i64 <=> MMX conversions are Legal.
11996 if (SrcVT==MVT::i64 && DstVT.isVector())
11998 if (DstVT==MVT::i64 && SrcVT.isVector())
12000 // MMX <=> MMX conversions are Legal.
12001 if (SrcVT.isVector() && DstVT.isVector())
12003 // All other conversions need to be expanded.
12007 static SDValue LowerLOAD_SUB(SDValue Op, SelectionDAG &DAG) {
12008 SDNode *Node = Op.getNode();
12009 DebugLoc dl = Node->getDebugLoc();
12010 EVT T = Node->getValueType(0);
12011 SDValue negOp = DAG.getNode(ISD::SUB, dl, T,
12012 DAG.getConstant(0, T), Node->getOperand(2));
12013 return DAG.getAtomic(ISD::ATOMIC_LOAD_ADD, dl,
12014 cast<AtomicSDNode>(Node)->getMemoryVT(),
12015 Node->getOperand(0),
12016 Node->getOperand(1), negOp,
12017 cast<AtomicSDNode>(Node)->getSrcValue(),
12018 cast<AtomicSDNode>(Node)->getAlignment(),
12019 cast<AtomicSDNode>(Node)->getOrdering(),
12020 cast<AtomicSDNode>(Node)->getSynchScope());
12023 static SDValue LowerATOMIC_STORE(SDValue Op, SelectionDAG &DAG) {
12024 SDNode *Node = Op.getNode();
12025 DebugLoc dl = Node->getDebugLoc();
12026 EVT VT = cast<AtomicSDNode>(Node)->getMemoryVT();
12028 // Convert seq_cst store -> xchg
12029 // Convert wide store -> swap (-> cmpxchg8b/cmpxchg16b)
12030 // FIXME: On 32-bit, store -> fist or movq would be more efficient
12031 // (The only way to get a 16-byte store is cmpxchg16b)
12032 // FIXME: 16-byte ATOMIC_SWAP isn't actually hooked up at the moment.
12033 if (cast<AtomicSDNode>(Node)->getOrdering() == SequentiallyConsistent ||
12034 !DAG.getTargetLoweringInfo().isTypeLegal(VT)) {
12035 SDValue Swap = DAG.getAtomic(ISD::ATOMIC_SWAP, dl,
12036 cast<AtomicSDNode>(Node)->getMemoryVT(),
12037 Node->getOperand(0),
12038 Node->getOperand(1), Node->getOperand(2),
12039 cast<AtomicSDNode>(Node)->getMemOperand(),
12040 cast<AtomicSDNode>(Node)->getOrdering(),
12041 cast<AtomicSDNode>(Node)->getSynchScope());
12042 return Swap.getValue(1);
12044 // Other atomic stores have a simple pattern.
12048 static SDValue LowerADDC_ADDE_SUBC_SUBE(SDValue Op, SelectionDAG &DAG) {
12049 EVT VT = Op.getNode()->getValueType(0);
12051 // Let legalize expand this if it isn't a legal type yet.
12052 if (!DAG.getTargetLoweringInfo().isTypeLegal(VT))
12055 SDVTList VTs = DAG.getVTList(VT, MVT::i32);
12058 bool ExtraOp = false;
12059 switch (Op.getOpcode()) {
12060 default: llvm_unreachable("Invalid code");
12061 case ISD::ADDC: Opc = X86ISD::ADD; break;
12062 case ISD::ADDE: Opc = X86ISD::ADC; ExtraOp = true; break;
12063 case ISD::SUBC: Opc = X86ISD::SUB; break;
12064 case ISD::SUBE: Opc = X86ISD::SBB; ExtraOp = true; break;
12068 return DAG.getNode(Opc, Op->getDebugLoc(), VTs, Op.getOperand(0),
12070 return DAG.getNode(Opc, Op->getDebugLoc(), VTs, Op.getOperand(0),
12071 Op.getOperand(1), Op.getOperand(2));
12074 SDValue X86TargetLowering::LowerFSINCOS(SDValue Op, SelectionDAG &DAG) const {
12075 assert(Subtarget->isTargetDarwin() && Subtarget->is64Bit());
12077 // For MacOSX, we want to call an alternative entry point: __sincos_stret,
12078 // which returns the values in two XMM registers.
12079 DebugLoc dl = Op.getDebugLoc();
12080 SDValue Arg = Op.getOperand(0);
12081 EVT ArgVT = Arg.getValueType();
12082 Type *ArgTy = ArgVT.getTypeForEVT(*DAG.getContext());
12085 ArgListEntry Entry;
12089 Entry.isSExt = false;
12090 Entry.isZExt = false;
12091 Args.push_back(Entry);
12093 // Only optimize x86_64 for now. i386 is a bit messy. For f32,
12094 // the small struct {f32, f32} is returned in (eax, edx). For f64,
12095 // the results are returned via SRet in memory.
12096 const char *LibcallName = (ArgVT == MVT::f64)
12097 ? "__sincos_stret" : "__sincosf_stret";
12098 SDValue Callee = DAG.getExternalSymbol(LibcallName, getPointerTy());
12100 StructType *RetTy = StructType::get(ArgTy, ArgTy, NULL);
12102 CallLoweringInfo CLI(DAG.getEntryNode(), RetTy,
12103 false, false, false, false, 0,
12104 CallingConv::C, /*isTaillCall=*/false,
12105 /*doesNotRet=*/false, /*isReturnValueUsed*/true,
12106 Callee, Args, DAG, dl);
12107 std::pair<SDValue, SDValue> CallResult = LowerCallTo(CLI);
12108 return CallResult.first;
12111 /// LowerOperation - Provide custom lowering hooks for some operations.
12113 SDValue X86TargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const {
12114 switch (Op.getOpcode()) {
12115 default: llvm_unreachable("Should not custom lower this!");
12116 case ISD::SIGN_EXTEND_INREG: return LowerSIGN_EXTEND_INREG(Op,DAG);
12117 case ISD::MEMBARRIER: return LowerMEMBARRIER(Op, Subtarget, DAG);
12118 case ISD::ATOMIC_FENCE: return LowerATOMIC_FENCE(Op, Subtarget, DAG);
12119 case ISD::ATOMIC_CMP_SWAP: return LowerCMP_SWAP(Op, Subtarget, DAG);
12120 case ISD::ATOMIC_LOAD_SUB: return LowerLOAD_SUB(Op,DAG);
12121 case ISD::ATOMIC_STORE: return LowerATOMIC_STORE(Op,DAG);
12122 case ISD::BUILD_VECTOR: return LowerBUILD_VECTOR(Op, DAG);
12123 case ISD::CONCAT_VECTORS: return LowerCONCAT_VECTORS(Op, DAG);
12124 case ISD::VECTOR_SHUFFLE: return LowerVECTOR_SHUFFLE(Op, DAG);
12125 case ISD::EXTRACT_VECTOR_ELT: return LowerEXTRACT_VECTOR_ELT(Op, DAG);
12126 case ISD::INSERT_VECTOR_ELT: return LowerINSERT_VECTOR_ELT(Op, DAG);
12127 case ISD::EXTRACT_SUBVECTOR: return LowerEXTRACT_SUBVECTOR(Op,Subtarget,DAG);
12128 case ISD::INSERT_SUBVECTOR: return LowerINSERT_SUBVECTOR(Op, Subtarget,DAG);
12129 case ISD::SCALAR_TO_VECTOR: return LowerSCALAR_TO_VECTOR(Op, DAG);
12130 case ISD::ConstantPool: return LowerConstantPool(Op, DAG);
12131 case ISD::GlobalAddress: return LowerGlobalAddress(Op, DAG);
12132 case ISD::GlobalTLSAddress: return LowerGlobalTLSAddress(Op, DAG);
12133 case ISD::ExternalSymbol: return LowerExternalSymbol(Op, DAG);
12134 case ISD::BlockAddress: return LowerBlockAddress(Op, DAG);
12135 case ISD::SHL_PARTS:
12136 case ISD::SRA_PARTS:
12137 case ISD::SRL_PARTS: return LowerShiftParts(Op, DAG);
12138 case ISD::SINT_TO_FP: return LowerSINT_TO_FP(Op, DAG);
12139 case ISD::UINT_TO_FP: return LowerUINT_TO_FP(Op, DAG);
12140 case ISD::TRUNCATE: return LowerTRUNCATE(Op, DAG);
12141 case ISD::ZERO_EXTEND: return LowerZERO_EXTEND(Op, DAG);
12142 case ISD::SIGN_EXTEND: return LowerSIGN_EXTEND(Op, DAG);
12143 case ISD::ANY_EXTEND: return LowerANY_EXTEND(Op, DAG);
12144 case ISD::FP_TO_SINT: return LowerFP_TO_SINT(Op, DAG);
12145 case ISD::FP_TO_UINT: return LowerFP_TO_UINT(Op, DAG);
12146 case ISD::FP_EXTEND: return LowerFP_EXTEND(Op, DAG);
12147 case ISD::FABS: return LowerFABS(Op, DAG);
12148 case ISD::FNEG: return LowerFNEG(Op, DAG);
12149 case ISD::FCOPYSIGN: return LowerFCOPYSIGN(Op, DAG);
12150 case ISD::FGETSIGN: return LowerFGETSIGN(Op, DAG);
12151 case ISD::SETCC: return LowerSETCC(Op, DAG);
12152 case ISD::SELECT: return LowerSELECT(Op, DAG);
12153 case ISD::BRCOND: return LowerBRCOND(Op, DAG);
12154 case ISD::JumpTable: return LowerJumpTable(Op, DAG);
12155 case ISD::VASTART: return LowerVASTART(Op, DAG);
12156 case ISD::VAARG: return LowerVAARG(Op, DAG);
12157 case ISD::VACOPY: return LowerVACOPY(Op, Subtarget, DAG);
12158 case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG);
12159 case ISD::INTRINSIC_W_CHAIN: return LowerINTRINSIC_W_CHAIN(Op, DAG);
12160 case ISD::RETURNADDR: return LowerRETURNADDR(Op, DAG);
12161 case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
12162 case ISD::FRAME_TO_ARGS_OFFSET:
12163 return LowerFRAME_TO_ARGS_OFFSET(Op, DAG);
12164 case ISD::DYNAMIC_STACKALLOC: return LowerDYNAMIC_STACKALLOC(Op, DAG);
12165 case ISD::EH_RETURN: return LowerEH_RETURN(Op, DAG);
12166 case ISD::EH_SJLJ_SETJMP: return lowerEH_SJLJ_SETJMP(Op, DAG);
12167 case ISD::EH_SJLJ_LONGJMP: return lowerEH_SJLJ_LONGJMP(Op, DAG);
12168 case ISD::INIT_TRAMPOLINE: return LowerINIT_TRAMPOLINE(Op, DAG);
12169 case ISD::ADJUST_TRAMPOLINE: return LowerADJUST_TRAMPOLINE(Op, DAG);
12170 case ISD::FLT_ROUNDS_: return LowerFLT_ROUNDS_(Op, DAG);
12171 case ISD::CTLZ: return LowerCTLZ(Op, DAG);
12172 case ISD::CTLZ_ZERO_UNDEF: return LowerCTLZ_ZERO_UNDEF(Op, DAG);
12173 case ISD::CTTZ: return LowerCTTZ(Op, DAG);
12174 case ISD::MUL: return LowerMUL(Op, Subtarget, DAG);
12177 case ISD::SHL: return LowerShift(Op, DAG);
12183 case ISD::UMULO: return LowerXALUO(Op, DAG);
12184 case ISD::READCYCLECOUNTER: return LowerREADCYCLECOUNTER(Op, Subtarget,DAG);
12185 case ISD::BITCAST: return LowerBITCAST(Op, DAG);
12189 case ISD::SUBE: return LowerADDC_ADDE_SUBC_SUBE(Op, DAG);
12190 case ISD::ADD: return LowerADD(Op, DAG);
12191 case ISD::SUB: return LowerSUB(Op, DAG);
12192 case ISD::SDIV: return LowerSDIV(Op, DAG);
12193 case ISD::FSINCOS: return LowerFSINCOS(Op, DAG);
12197 static void ReplaceATOMIC_LOAD(SDNode *Node,
12198 SmallVectorImpl<SDValue> &Results,
12199 SelectionDAG &DAG) {
12200 DebugLoc dl = Node->getDebugLoc();
12201 EVT VT = cast<AtomicSDNode>(Node)->getMemoryVT();
12203 // Convert wide load -> cmpxchg8b/cmpxchg16b
12204 // FIXME: On 32-bit, load -> fild or movq would be more efficient
12205 // (The only way to get a 16-byte load is cmpxchg16b)
12206 // FIXME: 16-byte ATOMIC_CMP_SWAP isn't actually hooked up at the moment.
12207 SDValue Zero = DAG.getConstant(0, VT);
12208 SDValue Swap = DAG.getAtomic(ISD::ATOMIC_CMP_SWAP, dl, VT,
12209 Node->getOperand(0),
12210 Node->getOperand(1), Zero, Zero,
12211 cast<AtomicSDNode>(Node)->getMemOperand(),
12212 cast<AtomicSDNode>(Node)->getOrdering(),
12213 cast<AtomicSDNode>(Node)->getSynchScope());
12214 Results.push_back(Swap.getValue(0));
12215 Results.push_back(Swap.getValue(1));
12219 ReplaceATOMIC_BINARY_64(SDNode *Node, SmallVectorImpl<SDValue>&Results,
12220 SelectionDAG &DAG, unsigned NewOp) {
12221 DebugLoc dl = Node->getDebugLoc();
12222 assert (Node->getValueType(0) == MVT::i64 &&
12223 "Only know how to expand i64 atomics");
12225 SDValue Chain = Node->getOperand(0);
12226 SDValue In1 = Node->getOperand(1);
12227 SDValue In2L = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
12228 Node->getOperand(2), DAG.getIntPtrConstant(0));
12229 SDValue In2H = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
12230 Node->getOperand(2), DAG.getIntPtrConstant(1));
12231 SDValue Ops[] = { Chain, In1, In2L, In2H };
12232 SDVTList Tys = DAG.getVTList(MVT::i32, MVT::i32, MVT::Other);
12234 DAG.getMemIntrinsicNode(NewOp, dl, Tys, Ops, 4, MVT::i64,
12235 cast<MemSDNode>(Node)->getMemOperand());
12236 SDValue OpsF[] = { Result.getValue(0), Result.getValue(1)};
12237 Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, OpsF, 2));
12238 Results.push_back(Result.getValue(2));
12241 /// ReplaceNodeResults - Replace a node with an illegal result type
12242 /// with a new node built out of custom code.
12243 void X86TargetLowering::ReplaceNodeResults(SDNode *N,
12244 SmallVectorImpl<SDValue>&Results,
12245 SelectionDAG &DAG) const {
12246 DebugLoc dl = N->getDebugLoc();
12247 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
12248 switch (N->getOpcode()) {
12250 llvm_unreachable("Do not know how to custom type legalize this operation!");
12251 case ISD::SIGN_EXTEND_INREG:
12256 // We don't want to expand or promote these.
12258 case ISD::FP_TO_SINT:
12259 case ISD::FP_TO_UINT: {
12260 bool IsSigned = N->getOpcode() == ISD::FP_TO_SINT;
12262 if (!IsSigned && !isIntegerTypeFTOL(SDValue(N, 0).getValueType()))
12265 std::pair<SDValue,SDValue> Vals =
12266 FP_TO_INTHelper(SDValue(N, 0), DAG, IsSigned, /*IsReplace=*/ true);
12267 SDValue FIST = Vals.first, StackSlot = Vals.second;
12268 if (FIST.getNode() != 0) {
12269 EVT VT = N->getValueType(0);
12270 // Return a load from the stack slot.
12271 if (StackSlot.getNode() != 0)
12272 Results.push_back(DAG.getLoad(VT, dl, FIST, StackSlot,
12273 MachinePointerInfo(),
12274 false, false, false, 0));
12276 Results.push_back(FIST);
12280 case ISD::UINT_TO_FP: {
12281 assert(Subtarget->hasSSE2() && "Requires at least SSE2!");
12282 if (N->getOperand(0).getValueType() != MVT::v2i32 ||
12283 N->getValueType(0) != MVT::v2f32)
12285 SDValue ZExtIn = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::v2i64,
12287 SDValue Bias = DAG.getConstantFP(BitsToDouble(0x4330000000000000ULL),
12289 SDValue VBias = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v2f64, Bias, Bias);
12290 SDValue Or = DAG.getNode(ISD::OR, dl, MVT::v2i64, ZExtIn,
12291 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64, VBias));
12292 Or = DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, Or);
12293 SDValue Sub = DAG.getNode(ISD::FSUB, dl, MVT::v2f64, Or, VBias);
12294 Results.push_back(DAG.getNode(X86ISD::VFPROUND, dl, MVT::v4f32, Sub));
12297 case ISD::FP_ROUND: {
12298 if (!TLI.isTypeLegal(N->getOperand(0).getValueType()))
12300 SDValue V = DAG.getNode(X86ISD::VFPROUND, dl, MVT::v4f32, N->getOperand(0));
12301 Results.push_back(V);
12304 case ISD::READCYCLECOUNTER: {
12305 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Glue);
12306 SDValue TheChain = N->getOperand(0);
12307 SDValue rd = DAG.getNode(X86ISD::RDTSC_DAG, dl, Tys, &TheChain, 1);
12308 SDValue eax = DAG.getCopyFromReg(rd, dl, X86::EAX, MVT::i32,
12310 SDValue edx = DAG.getCopyFromReg(eax.getValue(1), dl, X86::EDX, MVT::i32,
12312 // Use a buildpair to merge the two 32-bit values into a 64-bit one.
12313 SDValue Ops[] = { eax, edx };
12314 Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Ops, 2));
12315 Results.push_back(edx.getValue(1));
12318 case ISD::ATOMIC_CMP_SWAP: {
12319 EVT T = N->getValueType(0);
12320 assert((T == MVT::i64 || T == MVT::i128) && "can only expand cmpxchg pair");
12321 bool Regs64bit = T == MVT::i128;
12322 EVT HalfT = Regs64bit ? MVT::i64 : MVT::i32;
12323 SDValue cpInL, cpInH;
12324 cpInL = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, HalfT, N->getOperand(2),
12325 DAG.getConstant(0, HalfT));
12326 cpInH = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, HalfT, N->getOperand(2),
12327 DAG.getConstant(1, HalfT));
12328 cpInL = DAG.getCopyToReg(N->getOperand(0), dl,
12329 Regs64bit ? X86::RAX : X86::EAX,
12331 cpInH = DAG.getCopyToReg(cpInL.getValue(0), dl,
12332 Regs64bit ? X86::RDX : X86::EDX,
12333 cpInH, cpInL.getValue(1));
12334 SDValue swapInL, swapInH;
12335 swapInL = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, HalfT, N->getOperand(3),
12336 DAG.getConstant(0, HalfT));
12337 swapInH = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, HalfT, N->getOperand(3),
12338 DAG.getConstant(1, HalfT));
12339 swapInL = DAG.getCopyToReg(cpInH.getValue(0), dl,
12340 Regs64bit ? X86::RBX : X86::EBX,
12341 swapInL, cpInH.getValue(1));
12342 swapInH = DAG.getCopyToReg(swapInL.getValue(0), dl,
12343 Regs64bit ? X86::RCX : X86::ECX,
12344 swapInH, swapInL.getValue(1));
12345 SDValue Ops[] = { swapInH.getValue(0),
12347 swapInH.getValue(1) };
12348 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Glue);
12349 MachineMemOperand *MMO = cast<AtomicSDNode>(N)->getMemOperand();
12350 unsigned Opcode = Regs64bit ? X86ISD::LCMPXCHG16_DAG :
12351 X86ISD::LCMPXCHG8_DAG;
12352 SDValue Result = DAG.getMemIntrinsicNode(Opcode, dl, Tys,
12354 SDValue cpOutL = DAG.getCopyFromReg(Result.getValue(0), dl,
12355 Regs64bit ? X86::RAX : X86::EAX,
12356 HalfT, Result.getValue(1));
12357 SDValue cpOutH = DAG.getCopyFromReg(cpOutL.getValue(1), dl,
12358 Regs64bit ? X86::RDX : X86::EDX,
12359 HalfT, cpOutL.getValue(2));
12360 SDValue OpsF[] = { cpOutL.getValue(0), cpOutH.getValue(0)};
12361 Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, T, OpsF, 2));
12362 Results.push_back(cpOutH.getValue(1));
12365 case ISD::ATOMIC_LOAD_ADD:
12366 case ISD::ATOMIC_LOAD_AND:
12367 case ISD::ATOMIC_LOAD_NAND:
12368 case ISD::ATOMIC_LOAD_OR:
12369 case ISD::ATOMIC_LOAD_SUB:
12370 case ISD::ATOMIC_LOAD_XOR:
12371 case ISD::ATOMIC_LOAD_MAX:
12372 case ISD::ATOMIC_LOAD_MIN:
12373 case ISD::ATOMIC_LOAD_UMAX:
12374 case ISD::ATOMIC_LOAD_UMIN:
12375 case ISD::ATOMIC_SWAP: {
12377 switch (N->getOpcode()) {
12378 default: llvm_unreachable("Unexpected opcode");
12379 case ISD::ATOMIC_LOAD_ADD:
12380 Opc = X86ISD::ATOMADD64_DAG;
12382 case ISD::ATOMIC_LOAD_AND:
12383 Opc = X86ISD::ATOMAND64_DAG;
12385 case ISD::ATOMIC_LOAD_NAND:
12386 Opc = X86ISD::ATOMNAND64_DAG;
12388 case ISD::ATOMIC_LOAD_OR:
12389 Opc = X86ISD::ATOMOR64_DAG;
12391 case ISD::ATOMIC_LOAD_SUB:
12392 Opc = X86ISD::ATOMSUB64_DAG;
12394 case ISD::ATOMIC_LOAD_XOR:
12395 Opc = X86ISD::ATOMXOR64_DAG;
12397 case ISD::ATOMIC_LOAD_MAX:
12398 Opc = X86ISD::ATOMMAX64_DAG;
12400 case ISD::ATOMIC_LOAD_MIN:
12401 Opc = X86ISD::ATOMMIN64_DAG;
12403 case ISD::ATOMIC_LOAD_UMAX:
12404 Opc = X86ISD::ATOMUMAX64_DAG;
12406 case ISD::ATOMIC_LOAD_UMIN:
12407 Opc = X86ISD::ATOMUMIN64_DAG;
12409 case ISD::ATOMIC_SWAP:
12410 Opc = X86ISD::ATOMSWAP64_DAG;
12413 ReplaceATOMIC_BINARY_64(N, Results, DAG, Opc);
12416 case ISD::ATOMIC_LOAD:
12417 ReplaceATOMIC_LOAD(N, Results, DAG);
12421 const char *X86TargetLowering::getTargetNodeName(unsigned Opcode) const {
12423 default: return NULL;
12424 case X86ISD::BSF: return "X86ISD::BSF";
12425 case X86ISD::BSR: return "X86ISD::BSR";
12426 case X86ISD::SHLD: return "X86ISD::SHLD";
12427 case X86ISD::SHRD: return "X86ISD::SHRD";
12428 case X86ISD::FAND: return "X86ISD::FAND";
12429 case X86ISD::FOR: return "X86ISD::FOR";
12430 case X86ISD::FXOR: return "X86ISD::FXOR";
12431 case X86ISD::FSRL: return "X86ISD::FSRL";
12432 case X86ISD::FILD: return "X86ISD::FILD";
12433 case X86ISD::FILD_FLAG: return "X86ISD::FILD_FLAG";
12434 case X86ISD::FP_TO_INT16_IN_MEM: return "X86ISD::FP_TO_INT16_IN_MEM";
12435 case X86ISD::FP_TO_INT32_IN_MEM: return "X86ISD::FP_TO_INT32_IN_MEM";
12436 case X86ISD::FP_TO_INT64_IN_MEM: return "X86ISD::FP_TO_INT64_IN_MEM";
12437 case X86ISD::FLD: return "X86ISD::FLD";
12438 case X86ISD::FST: return "X86ISD::FST";
12439 case X86ISD::CALL: return "X86ISD::CALL";
12440 case X86ISD::RDTSC_DAG: return "X86ISD::RDTSC_DAG";
12441 case X86ISD::BT: return "X86ISD::BT";
12442 case X86ISD::CMP: return "X86ISD::CMP";
12443 case X86ISD::COMI: return "X86ISD::COMI";
12444 case X86ISD::UCOMI: return "X86ISD::UCOMI";
12445 case X86ISD::SETCC: return "X86ISD::SETCC";
12446 case X86ISD::SETCC_CARRY: return "X86ISD::SETCC_CARRY";
12447 case X86ISD::FSETCCsd: return "X86ISD::FSETCCsd";
12448 case X86ISD::FSETCCss: return "X86ISD::FSETCCss";
12449 case X86ISD::CMOV: return "X86ISD::CMOV";
12450 case X86ISD::BRCOND: return "X86ISD::BRCOND";
12451 case X86ISD::RET_FLAG: return "X86ISD::RET_FLAG";
12452 case X86ISD::REP_STOS: return "X86ISD::REP_STOS";
12453 case X86ISD::REP_MOVS: return "X86ISD::REP_MOVS";
12454 case X86ISD::GlobalBaseReg: return "X86ISD::GlobalBaseReg";
12455 case X86ISD::Wrapper: return "X86ISD::Wrapper";
12456 case X86ISD::WrapperRIP: return "X86ISD::WrapperRIP";
12457 case X86ISD::PEXTRB: return "X86ISD::PEXTRB";
12458 case X86ISD::PEXTRW: return "X86ISD::PEXTRW";
12459 case X86ISD::INSERTPS: return "X86ISD::INSERTPS";
12460 case X86ISD::PINSRB: return "X86ISD::PINSRB";
12461 case X86ISD::PINSRW: return "X86ISD::PINSRW";
12462 case X86ISD::PSHUFB: return "X86ISD::PSHUFB";
12463 case X86ISD::ANDNP: return "X86ISD::ANDNP";
12464 case X86ISD::PSIGN: return "X86ISD::PSIGN";
12465 case X86ISD::BLENDV: return "X86ISD::BLENDV";
12466 case X86ISD::BLENDI: return "X86ISD::BLENDI";
12467 case X86ISD::SUBUS: return "X86ISD::SUBUS";
12468 case X86ISD::HADD: return "X86ISD::HADD";
12469 case X86ISD::HSUB: return "X86ISD::HSUB";
12470 case X86ISD::FHADD: return "X86ISD::FHADD";
12471 case X86ISD::FHSUB: return "X86ISD::FHSUB";
12472 case X86ISD::UMAX: return "X86ISD::UMAX";
12473 case X86ISD::UMIN: return "X86ISD::UMIN";
12474 case X86ISD::SMAX: return "X86ISD::SMAX";
12475 case X86ISD::SMIN: return "X86ISD::SMIN";
12476 case X86ISD::FMAX: return "X86ISD::FMAX";
12477 case X86ISD::FMIN: return "X86ISD::FMIN";
12478 case X86ISD::FMAXC: return "X86ISD::FMAXC";
12479 case X86ISD::FMINC: return "X86ISD::FMINC";
12480 case X86ISD::FRSQRT: return "X86ISD::FRSQRT";
12481 case X86ISD::FRCP: return "X86ISD::FRCP";
12482 case X86ISD::TLSADDR: return "X86ISD::TLSADDR";
12483 case X86ISD::TLSBASEADDR: return "X86ISD::TLSBASEADDR";
12484 case X86ISD::TLSCALL: return "X86ISD::TLSCALL";
12485 case X86ISD::EH_SJLJ_SETJMP: return "X86ISD::EH_SJLJ_SETJMP";
12486 case X86ISD::EH_SJLJ_LONGJMP: return "X86ISD::EH_SJLJ_LONGJMP";
12487 case X86ISD::EH_RETURN: return "X86ISD::EH_RETURN";
12488 case X86ISD::TC_RETURN: return "X86ISD::TC_RETURN";
12489 case X86ISD::FNSTCW16m: return "X86ISD::FNSTCW16m";
12490 case X86ISD::FNSTSW16r: return "X86ISD::FNSTSW16r";
12491 case X86ISD::LCMPXCHG_DAG: return "X86ISD::LCMPXCHG_DAG";
12492 case X86ISD::LCMPXCHG8_DAG: return "X86ISD::LCMPXCHG8_DAG";
12493 case X86ISD::ATOMADD64_DAG: return "X86ISD::ATOMADD64_DAG";
12494 case X86ISD::ATOMSUB64_DAG: return "X86ISD::ATOMSUB64_DAG";
12495 case X86ISD::ATOMOR64_DAG: return "X86ISD::ATOMOR64_DAG";
12496 case X86ISD::ATOMXOR64_DAG: return "X86ISD::ATOMXOR64_DAG";
12497 case X86ISD::ATOMAND64_DAG: return "X86ISD::ATOMAND64_DAG";
12498 case X86ISD::ATOMNAND64_DAG: return "X86ISD::ATOMNAND64_DAG";
12499 case X86ISD::VZEXT_MOVL: return "X86ISD::VZEXT_MOVL";
12500 case X86ISD::VSEXT_MOVL: return "X86ISD::VSEXT_MOVL";
12501 case X86ISD::VZEXT_LOAD: return "X86ISD::VZEXT_LOAD";
12502 case X86ISD::VZEXT: return "X86ISD::VZEXT";
12503 case X86ISD::VSEXT: return "X86ISD::VSEXT";
12504 case X86ISD::VFPEXT: return "X86ISD::VFPEXT";
12505 case X86ISD::VFPROUND: return "X86ISD::VFPROUND";
12506 case X86ISD::VSHLDQ: return "X86ISD::VSHLDQ";
12507 case X86ISD::VSRLDQ: return "X86ISD::VSRLDQ";
12508 case X86ISD::VSHL: return "X86ISD::VSHL";
12509 case X86ISD::VSRL: return "X86ISD::VSRL";
12510 case X86ISD::VSRA: return "X86ISD::VSRA";
12511 case X86ISD::VSHLI: return "X86ISD::VSHLI";
12512 case X86ISD::VSRLI: return "X86ISD::VSRLI";
12513 case X86ISD::VSRAI: return "X86ISD::VSRAI";
12514 case X86ISD::CMPP: return "X86ISD::CMPP";
12515 case X86ISD::PCMPEQ: return "X86ISD::PCMPEQ";
12516 case X86ISD::PCMPGT: return "X86ISD::PCMPGT";
12517 case X86ISD::ADD: return "X86ISD::ADD";
12518 case X86ISD::SUB: return "X86ISD::SUB";
12519 case X86ISD::ADC: return "X86ISD::ADC";
12520 case X86ISD::SBB: return "X86ISD::SBB";
12521 case X86ISD::SMUL: return "X86ISD::SMUL";
12522 case X86ISD::UMUL: return "X86ISD::UMUL";
12523 case X86ISD::INC: return "X86ISD::INC";
12524 case X86ISD::DEC: return "X86ISD::DEC";
12525 case X86ISD::OR: return "X86ISD::OR";
12526 case X86ISD::XOR: return "X86ISD::XOR";
12527 case X86ISD::AND: return "X86ISD::AND";
12528 case X86ISD::BLSI: return "X86ISD::BLSI";
12529 case X86ISD::BLSMSK: return "X86ISD::BLSMSK";
12530 case X86ISD::BLSR: return "X86ISD::BLSR";
12531 case X86ISD::MUL_IMM: return "X86ISD::MUL_IMM";
12532 case X86ISD::PTEST: return "X86ISD::PTEST";
12533 case X86ISD::TESTP: return "X86ISD::TESTP";
12534 case X86ISD::PALIGNR: return "X86ISD::PALIGNR";
12535 case X86ISD::PSHUFD: return "X86ISD::PSHUFD";
12536 case X86ISD::PSHUFHW: return "X86ISD::PSHUFHW";
12537 case X86ISD::PSHUFLW: return "X86ISD::PSHUFLW";
12538 case X86ISD::SHUFP: return "X86ISD::SHUFP";
12539 case X86ISD::MOVLHPS: return "X86ISD::MOVLHPS";
12540 case X86ISD::MOVLHPD: return "X86ISD::MOVLHPD";
12541 case X86ISD::MOVHLPS: return "X86ISD::MOVHLPS";
12542 case X86ISD::MOVLPS: return "X86ISD::MOVLPS";
12543 case X86ISD::MOVLPD: return "X86ISD::MOVLPD";
12544 case X86ISD::MOVDDUP: return "X86ISD::MOVDDUP";
12545 case X86ISD::MOVSHDUP: return "X86ISD::MOVSHDUP";
12546 case X86ISD::MOVSLDUP: return "X86ISD::MOVSLDUP";
12547 case X86ISD::MOVSD: return "X86ISD::MOVSD";
12548 case X86ISD::MOVSS: return "X86ISD::MOVSS";
12549 case X86ISD::UNPCKL: return "X86ISD::UNPCKL";
12550 case X86ISD::UNPCKH: return "X86ISD::UNPCKH";
12551 case X86ISD::VBROADCAST: return "X86ISD::VBROADCAST";
12552 case X86ISD::VPERMILP: return "X86ISD::VPERMILP";
12553 case X86ISD::VPERM2X128: return "X86ISD::VPERM2X128";
12554 case X86ISD::VPERMV: return "X86ISD::VPERMV";
12555 case X86ISD::VPERMI: return "X86ISD::VPERMI";
12556 case X86ISD::PMULUDQ: return "X86ISD::PMULUDQ";
12557 case X86ISD::VASTART_SAVE_XMM_REGS: return "X86ISD::VASTART_SAVE_XMM_REGS";
12558 case X86ISD::VAARG_64: return "X86ISD::VAARG_64";
12559 case X86ISD::WIN_ALLOCA: return "X86ISD::WIN_ALLOCA";
12560 case X86ISD::MEMBARRIER: return "X86ISD::MEMBARRIER";
12561 case X86ISD::SEG_ALLOCA: return "X86ISD::SEG_ALLOCA";
12562 case X86ISD::WIN_FTOL: return "X86ISD::WIN_FTOL";
12563 case X86ISD::SAHF: return "X86ISD::SAHF";
12564 case X86ISD::RDRAND: return "X86ISD::RDRAND";
12565 case X86ISD::FMADD: return "X86ISD::FMADD";
12566 case X86ISD::FMSUB: return "X86ISD::FMSUB";
12567 case X86ISD::FNMADD: return "X86ISD::FNMADD";
12568 case X86ISD::FNMSUB: return "X86ISD::FNMSUB";
12569 case X86ISD::FMADDSUB: return "X86ISD::FMADDSUB";
12570 case X86ISD::FMSUBADD: return "X86ISD::FMSUBADD";
12571 case X86ISD::PCMPESTRI: return "X86ISD::PCMPESTRI";
12572 case X86ISD::PCMPISTRI: return "X86ISD::PCMPISTRI";
12576 // isLegalAddressingMode - Return true if the addressing mode represented
12577 // by AM is legal for this target, for a load/store of the specified type.
12578 bool X86TargetLowering::isLegalAddressingMode(const AddrMode &AM,
12580 // X86 supports extremely general addressing modes.
12581 CodeModel::Model M = getTargetMachine().getCodeModel();
12582 Reloc::Model R = getTargetMachine().getRelocationModel();
12584 // X86 allows a sign-extended 32-bit immediate field as a displacement.
12585 if (!X86::isOffsetSuitableForCodeModel(AM.BaseOffs, M, AM.BaseGV != NULL))
12590 Subtarget->ClassifyGlobalReference(AM.BaseGV, getTargetMachine());
12592 // If a reference to this global requires an extra load, we can't fold it.
12593 if (isGlobalStubReference(GVFlags))
12596 // If BaseGV requires a register for the PIC base, we cannot also have a
12597 // BaseReg specified.
12598 if (AM.HasBaseReg && isGlobalRelativeToPICBase(GVFlags))
12601 // If lower 4G is not available, then we must use rip-relative addressing.
12602 if ((M != CodeModel::Small || R != Reloc::Static) &&
12603 Subtarget->is64Bit() && (AM.BaseOffs || AM.Scale > 1))
12607 switch (AM.Scale) {
12613 // These scales always work.
12618 // These scales are formed with basereg+scalereg. Only accept if there is
12623 default: // Other stuff never works.
12630 bool X86TargetLowering::isTruncateFree(Type *Ty1, Type *Ty2) const {
12631 if (!Ty1->isIntegerTy() || !Ty2->isIntegerTy())
12633 unsigned NumBits1 = Ty1->getPrimitiveSizeInBits();
12634 unsigned NumBits2 = Ty2->getPrimitiveSizeInBits();
12635 return NumBits1 > NumBits2;
12638 bool X86TargetLowering::isLegalICmpImmediate(int64_t Imm) const {
12639 return isInt<32>(Imm);
12642 bool X86TargetLowering::isLegalAddImmediate(int64_t Imm) const {
12643 // Can also use sub to handle negated immediates.
12644 return isInt<32>(Imm);
12647 bool X86TargetLowering::isTruncateFree(EVT VT1, EVT VT2) const {
12648 if (!VT1.isInteger() || !VT2.isInteger())
12650 unsigned NumBits1 = VT1.getSizeInBits();
12651 unsigned NumBits2 = VT2.getSizeInBits();
12652 return NumBits1 > NumBits2;
12655 bool X86TargetLowering::isZExtFree(Type *Ty1, Type *Ty2) const {
12656 // x86-64 implicitly zero-extends 32-bit results in 64-bit registers.
12657 return Ty1->isIntegerTy(32) && Ty2->isIntegerTy(64) && Subtarget->is64Bit();
12660 bool X86TargetLowering::isZExtFree(EVT VT1, EVT VT2) const {
12661 // x86-64 implicitly zero-extends 32-bit results in 64-bit registers.
12662 return VT1 == MVT::i32 && VT2 == MVT::i64 && Subtarget->is64Bit();
12665 bool X86TargetLowering::isZExtFree(SDValue Val, EVT VT2) const {
12666 EVT VT1 = Val.getValueType();
12667 if (isZExtFree(VT1, VT2))
12670 if (Val.getOpcode() != ISD::LOAD)
12673 if (!VT1.isSimple() || !VT1.isInteger() ||
12674 !VT2.isSimple() || !VT2.isInteger())
12677 switch (VT1.getSimpleVT().SimpleTy) {
12682 // X86 has 8, 16, and 32-bit zero-extending loads.
12689 bool X86TargetLowering::isNarrowingProfitable(EVT VT1, EVT VT2) const {
12690 // i16 instructions are longer (0x66 prefix) and potentially slower.
12691 return !(VT1 == MVT::i32 && VT2 == MVT::i16);
12694 /// isShuffleMaskLegal - Targets can use this to indicate that they only
12695 /// support *some* VECTOR_SHUFFLE operations, those with specific masks.
12696 /// By default, if a target supports the VECTOR_SHUFFLE node, all mask values
12697 /// are assumed to be legal.
12699 X86TargetLowering::isShuffleMaskLegal(const SmallVectorImpl<int> &M,
12701 // Very little shuffling can be done for 64-bit vectors right now.
12702 if (VT.getSizeInBits() == 64)
12705 // FIXME: pshufb, blends, shifts.
12706 return (VT.getVectorNumElements() == 2 ||
12707 ShuffleVectorSDNode::isSplatMask(&M[0], VT) ||
12708 isMOVLMask(M, VT) ||
12709 isSHUFPMask(M, VT, Subtarget->hasFp256()) ||
12710 isPSHUFDMask(M, VT) ||
12711 isPSHUFHWMask(M, VT, Subtarget->hasInt256()) ||
12712 isPSHUFLWMask(M, VT, Subtarget->hasInt256()) ||
12713 isPALIGNRMask(M, VT, Subtarget) ||
12714 isUNPCKLMask(M, VT, Subtarget->hasInt256()) ||
12715 isUNPCKHMask(M, VT, Subtarget->hasInt256()) ||
12716 isUNPCKL_v_undef_Mask(M, VT, Subtarget->hasInt256()) ||
12717 isUNPCKH_v_undef_Mask(M, VT, Subtarget->hasInt256()));
12721 X86TargetLowering::isVectorClearMaskLegal(const SmallVectorImpl<int> &Mask,
12723 unsigned NumElts = VT.getVectorNumElements();
12724 // FIXME: This collection of masks seems suspect.
12727 if (NumElts == 4 && VT.is128BitVector()) {
12728 return (isMOVLMask(Mask, VT) ||
12729 isCommutedMOVLMask(Mask, VT, true) ||
12730 isSHUFPMask(Mask, VT, Subtarget->hasFp256()) ||
12731 isSHUFPMask(Mask, VT, Subtarget->hasFp256(), /* Commuted */ true));
12736 //===----------------------------------------------------------------------===//
12737 // X86 Scheduler Hooks
12738 //===----------------------------------------------------------------------===//
12740 /// Utility function to emit xbegin specifying the start of an RTM region.
12741 static MachineBasicBlock *EmitXBegin(MachineInstr *MI, MachineBasicBlock *MBB,
12742 const TargetInstrInfo *TII) {
12743 DebugLoc DL = MI->getDebugLoc();
12745 const BasicBlock *BB = MBB->getBasicBlock();
12746 MachineFunction::iterator I = MBB;
12749 // For the v = xbegin(), we generate
12760 MachineBasicBlock *thisMBB = MBB;
12761 MachineFunction *MF = MBB->getParent();
12762 MachineBasicBlock *mainMBB = MF->CreateMachineBasicBlock(BB);
12763 MachineBasicBlock *sinkMBB = MF->CreateMachineBasicBlock(BB);
12764 MF->insert(I, mainMBB);
12765 MF->insert(I, sinkMBB);
12767 // Transfer the remainder of BB and its successor edges to sinkMBB.
12768 sinkMBB->splice(sinkMBB->begin(), MBB,
12769 llvm::next(MachineBasicBlock::iterator(MI)), MBB->end());
12770 sinkMBB->transferSuccessorsAndUpdatePHIs(MBB);
12774 // # fallthrough to mainMBB
12775 // # abortion to sinkMBB
12776 BuildMI(thisMBB, DL, TII->get(X86::XBEGIN_4)).addMBB(sinkMBB);
12777 thisMBB->addSuccessor(mainMBB);
12778 thisMBB->addSuccessor(sinkMBB);
12782 BuildMI(mainMBB, DL, TII->get(X86::MOV32ri), X86::EAX).addImm(-1);
12783 mainMBB->addSuccessor(sinkMBB);
12786 // EAX is live into the sinkMBB
12787 sinkMBB->addLiveIn(X86::EAX);
12788 BuildMI(*sinkMBB, sinkMBB->begin(), DL,
12789 TII->get(TargetOpcode::COPY), MI->getOperand(0).getReg())
12792 MI->eraseFromParent();
12796 // Get CMPXCHG opcode for the specified data type.
12797 static unsigned getCmpXChgOpcode(EVT VT) {
12798 switch (VT.getSimpleVT().SimpleTy) {
12799 case MVT::i8: return X86::LCMPXCHG8;
12800 case MVT::i16: return X86::LCMPXCHG16;
12801 case MVT::i32: return X86::LCMPXCHG32;
12802 case MVT::i64: return X86::LCMPXCHG64;
12806 llvm_unreachable("Invalid operand size!");
12809 // Get LOAD opcode for the specified data type.
12810 static unsigned getLoadOpcode(EVT VT) {
12811 switch (VT.getSimpleVT().SimpleTy) {
12812 case MVT::i8: return X86::MOV8rm;
12813 case MVT::i16: return X86::MOV16rm;
12814 case MVT::i32: return X86::MOV32rm;
12815 case MVT::i64: return X86::MOV64rm;
12819 llvm_unreachable("Invalid operand size!");
12822 // Get opcode of the non-atomic one from the specified atomic instruction.
12823 static unsigned getNonAtomicOpcode(unsigned Opc) {
12825 case X86::ATOMAND8: return X86::AND8rr;
12826 case X86::ATOMAND16: return X86::AND16rr;
12827 case X86::ATOMAND32: return X86::AND32rr;
12828 case X86::ATOMAND64: return X86::AND64rr;
12829 case X86::ATOMOR8: return X86::OR8rr;
12830 case X86::ATOMOR16: return X86::OR16rr;
12831 case X86::ATOMOR32: return X86::OR32rr;
12832 case X86::ATOMOR64: return X86::OR64rr;
12833 case X86::ATOMXOR8: return X86::XOR8rr;
12834 case X86::ATOMXOR16: return X86::XOR16rr;
12835 case X86::ATOMXOR32: return X86::XOR32rr;
12836 case X86::ATOMXOR64: return X86::XOR64rr;
12838 llvm_unreachable("Unhandled atomic-load-op opcode!");
12841 // Get opcode of the non-atomic one from the specified atomic instruction with
12843 static unsigned getNonAtomicOpcodeWithExtraOpc(unsigned Opc,
12844 unsigned &ExtraOpc) {
12846 case X86::ATOMNAND8: ExtraOpc = X86::NOT8r; return X86::AND8rr;
12847 case X86::ATOMNAND16: ExtraOpc = X86::NOT16r; return X86::AND16rr;
12848 case X86::ATOMNAND32: ExtraOpc = X86::NOT32r; return X86::AND32rr;
12849 case X86::ATOMNAND64: ExtraOpc = X86::NOT64r; return X86::AND64rr;
12850 case X86::ATOMMAX8: ExtraOpc = X86::CMP8rr; return X86::CMOVL32rr;
12851 case X86::ATOMMAX16: ExtraOpc = X86::CMP16rr; return X86::CMOVL16rr;
12852 case X86::ATOMMAX32: ExtraOpc = X86::CMP32rr; return X86::CMOVL32rr;
12853 case X86::ATOMMAX64: ExtraOpc = X86::CMP64rr; return X86::CMOVL64rr;
12854 case X86::ATOMMIN8: ExtraOpc = X86::CMP8rr; return X86::CMOVG32rr;
12855 case X86::ATOMMIN16: ExtraOpc = X86::CMP16rr; return X86::CMOVG16rr;
12856 case X86::ATOMMIN32: ExtraOpc = X86::CMP32rr; return X86::CMOVG32rr;
12857 case X86::ATOMMIN64: ExtraOpc = X86::CMP64rr; return X86::CMOVG64rr;
12858 case X86::ATOMUMAX8: ExtraOpc = X86::CMP8rr; return X86::CMOVB32rr;
12859 case X86::ATOMUMAX16: ExtraOpc = X86::CMP16rr; return X86::CMOVB16rr;
12860 case X86::ATOMUMAX32: ExtraOpc = X86::CMP32rr; return X86::CMOVB32rr;
12861 case X86::ATOMUMAX64: ExtraOpc = X86::CMP64rr; return X86::CMOVB64rr;
12862 case X86::ATOMUMIN8: ExtraOpc = X86::CMP8rr; return X86::CMOVA32rr;
12863 case X86::ATOMUMIN16: ExtraOpc = X86::CMP16rr; return X86::CMOVA16rr;
12864 case X86::ATOMUMIN32: ExtraOpc = X86::CMP32rr; return X86::CMOVA32rr;
12865 case X86::ATOMUMIN64: ExtraOpc = X86::CMP64rr; return X86::CMOVA64rr;
12867 llvm_unreachable("Unhandled atomic-load-op opcode!");
12870 // Get opcode of the non-atomic one from the specified atomic instruction for
12871 // 64-bit data type on 32-bit target.
12872 static unsigned getNonAtomic6432Opcode(unsigned Opc, unsigned &HiOpc) {
12874 case X86::ATOMAND6432: HiOpc = X86::AND32rr; return X86::AND32rr;
12875 case X86::ATOMOR6432: HiOpc = X86::OR32rr; return X86::OR32rr;
12876 case X86::ATOMXOR6432: HiOpc = X86::XOR32rr; return X86::XOR32rr;
12877 case X86::ATOMADD6432: HiOpc = X86::ADC32rr; return X86::ADD32rr;
12878 case X86::ATOMSUB6432: HiOpc = X86::SBB32rr; return X86::SUB32rr;
12879 case X86::ATOMSWAP6432: HiOpc = X86::MOV32rr; return X86::MOV32rr;
12880 case X86::ATOMMAX6432: HiOpc = X86::SETLr; return X86::SETLr;
12881 case X86::ATOMMIN6432: HiOpc = X86::SETGr; return X86::SETGr;
12882 case X86::ATOMUMAX6432: HiOpc = X86::SETBr; return X86::SETBr;
12883 case X86::ATOMUMIN6432: HiOpc = X86::SETAr; return X86::SETAr;
12885 llvm_unreachable("Unhandled atomic-load-op opcode!");
12888 // Get opcode of the non-atomic one from the specified atomic instruction for
12889 // 64-bit data type on 32-bit target with extra opcode.
12890 static unsigned getNonAtomic6432OpcodeWithExtraOpc(unsigned Opc,
12892 unsigned &ExtraOpc) {
12894 case X86::ATOMNAND6432:
12895 ExtraOpc = X86::NOT32r;
12896 HiOpc = X86::AND32rr;
12897 return X86::AND32rr;
12899 llvm_unreachable("Unhandled atomic-load-op opcode!");
12902 // Get pseudo CMOV opcode from the specified data type.
12903 static unsigned getPseudoCMOVOpc(EVT VT) {
12904 switch (VT.getSimpleVT().SimpleTy) {
12905 case MVT::i8: return X86::CMOV_GR8;
12906 case MVT::i16: return X86::CMOV_GR16;
12907 case MVT::i32: return X86::CMOV_GR32;
12911 llvm_unreachable("Unknown CMOV opcode!");
12914 // EmitAtomicLoadArith - emit the code sequence for pseudo atomic instructions.
12915 // They will be translated into a spin-loop or compare-exchange loop from
12918 // dst = atomic-fetch-op MI.addr, MI.val
12924 // t1 = LOAD MI.addr
12926 // t4 = phi(t1, t3 / loop)
12927 // t2 = OP MI.val, t4
12929 // LCMPXCHG [MI.addr], t2, [EAX is implicitly used & defined]
12935 MachineBasicBlock *
12936 X86TargetLowering::EmitAtomicLoadArith(MachineInstr *MI,
12937 MachineBasicBlock *MBB) const {
12938 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
12939 DebugLoc DL = MI->getDebugLoc();
12941 MachineFunction *MF = MBB->getParent();
12942 MachineRegisterInfo &MRI = MF->getRegInfo();
12944 const BasicBlock *BB = MBB->getBasicBlock();
12945 MachineFunction::iterator I = MBB;
12948 assert(MI->getNumOperands() <= X86::AddrNumOperands + 4 &&
12949 "Unexpected number of operands");
12951 assert(MI->hasOneMemOperand() &&
12952 "Expected atomic-load-op to have one memoperand");
12954 // Memory Reference
12955 MachineInstr::mmo_iterator MMOBegin = MI->memoperands_begin();
12956 MachineInstr::mmo_iterator MMOEnd = MI->memoperands_end();
12958 unsigned DstReg, SrcReg;
12959 unsigned MemOpndSlot;
12961 unsigned CurOp = 0;
12963 DstReg = MI->getOperand(CurOp++).getReg();
12964 MemOpndSlot = CurOp;
12965 CurOp += X86::AddrNumOperands;
12966 SrcReg = MI->getOperand(CurOp++).getReg();
12968 const TargetRegisterClass *RC = MRI.getRegClass(DstReg);
12969 MVT::SimpleValueType VT = *RC->vt_begin();
12970 unsigned t1 = MRI.createVirtualRegister(RC);
12971 unsigned t2 = MRI.createVirtualRegister(RC);
12972 unsigned t3 = MRI.createVirtualRegister(RC);
12973 unsigned t4 = MRI.createVirtualRegister(RC);
12974 unsigned PhyReg = getX86SubSuperRegister(X86::EAX, VT);
12976 unsigned LCMPXCHGOpc = getCmpXChgOpcode(VT);
12977 unsigned LOADOpc = getLoadOpcode(VT);
12979 // For the atomic load-arith operator, we generate
12982 // t1 = LOAD [MI.addr]
12984 // t4 = phi(t1 / thisMBB, t3 / mainMBB)
12985 // t1 = OP MI.val, EAX
12987 // LCMPXCHG [MI.addr], t1, [EAX is implicitly used & defined]
12993 MachineBasicBlock *thisMBB = MBB;
12994 MachineBasicBlock *mainMBB = MF->CreateMachineBasicBlock(BB);
12995 MachineBasicBlock *sinkMBB = MF->CreateMachineBasicBlock(BB);
12996 MF->insert(I, mainMBB);
12997 MF->insert(I, sinkMBB);
12999 MachineInstrBuilder MIB;
13001 // Transfer the remainder of BB and its successor edges to sinkMBB.
13002 sinkMBB->splice(sinkMBB->begin(), MBB,
13003 llvm::next(MachineBasicBlock::iterator(MI)), MBB->end());
13004 sinkMBB->transferSuccessorsAndUpdatePHIs(MBB);
13007 MIB = BuildMI(thisMBB, DL, TII->get(LOADOpc), t1);
13008 for (unsigned i = 0; i < X86::AddrNumOperands; ++i) {
13009 MachineOperand NewMO = MI->getOperand(MemOpndSlot + i);
13011 NewMO.setIsKill(false);
13012 MIB.addOperand(NewMO);
13014 for (MachineInstr::mmo_iterator MMOI = MMOBegin; MMOI != MMOEnd; ++MMOI) {
13015 unsigned flags = (*MMOI)->getFlags();
13016 flags = (flags & ~MachineMemOperand::MOStore) | MachineMemOperand::MOLoad;
13017 MachineMemOperand *MMO =
13018 MF->getMachineMemOperand((*MMOI)->getPointerInfo(), flags,
13019 (*MMOI)->getSize(),
13020 (*MMOI)->getBaseAlignment(),
13021 (*MMOI)->getTBAAInfo(),
13022 (*MMOI)->getRanges());
13023 MIB.addMemOperand(MMO);
13026 thisMBB->addSuccessor(mainMBB);
13029 MachineBasicBlock *origMainMBB = mainMBB;
13032 MachineInstr *Phi = BuildMI(mainMBB, DL, TII->get(X86::PHI), t4)
13033 .addReg(t1).addMBB(thisMBB).addReg(t3).addMBB(mainMBB);
13035 unsigned Opc = MI->getOpcode();
13038 llvm_unreachable("Unhandled atomic-load-op opcode!");
13039 case X86::ATOMAND8:
13040 case X86::ATOMAND16:
13041 case X86::ATOMAND32:
13042 case X86::ATOMAND64:
13044 case X86::ATOMOR16:
13045 case X86::ATOMOR32:
13046 case X86::ATOMOR64:
13047 case X86::ATOMXOR8:
13048 case X86::ATOMXOR16:
13049 case X86::ATOMXOR32:
13050 case X86::ATOMXOR64: {
13051 unsigned ARITHOpc = getNonAtomicOpcode(Opc);
13052 BuildMI(mainMBB, DL, TII->get(ARITHOpc), t2).addReg(SrcReg)
13056 case X86::ATOMNAND8:
13057 case X86::ATOMNAND16:
13058 case X86::ATOMNAND32:
13059 case X86::ATOMNAND64: {
13060 unsigned Tmp = MRI.createVirtualRegister(RC);
13062 unsigned ANDOpc = getNonAtomicOpcodeWithExtraOpc(Opc, NOTOpc);
13063 BuildMI(mainMBB, DL, TII->get(ANDOpc), Tmp).addReg(SrcReg)
13065 BuildMI(mainMBB, DL, TII->get(NOTOpc), t2).addReg(Tmp);
13068 case X86::ATOMMAX8:
13069 case X86::ATOMMAX16:
13070 case X86::ATOMMAX32:
13071 case X86::ATOMMAX64:
13072 case X86::ATOMMIN8:
13073 case X86::ATOMMIN16:
13074 case X86::ATOMMIN32:
13075 case X86::ATOMMIN64:
13076 case X86::ATOMUMAX8:
13077 case X86::ATOMUMAX16:
13078 case X86::ATOMUMAX32:
13079 case X86::ATOMUMAX64:
13080 case X86::ATOMUMIN8:
13081 case X86::ATOMUMIN16:
13082 case X86::ATOMUMIN32:
13083 case X86::ATOMUMIN64: {
13085 unsigned CMOVOpc = getNonAtomicOpcodeWithExtraOpc(Opc, CMPOpc);
13087 BuildMI(mainMBB, DL, TII->get(CMPOpc))
13091 if (Subtarget->hasCMov()) {
13092 if (VT != MVT::i8) {
13094 BuildMI(mainMBB, DL, TII->get(CMOVOpc), t2)
13098 // Promote i8 to i32 to use CMOV32
13099 const TargetRegisterInfo* TRI = getTargetMachine().getRegisterInfo();
13100 const TargetRegisterClass *RC32 =
13101 TRI->getSubClassWithSubReg(getRegClassFor(MVT::i32), X86::sub_8bit);
13102 unsigned SrcReg32 = MRI.createVirtualRegister(RC32);
13103 unsigned AccReg32 = MRI.createVirtualRegister(RC32);
13104 unsigned Tmp = MRI.createVirtualRegister(RC32);
13106 unsigned Undef = MRI.createVirtualRegister(RC32);
13107 BuildMI(mainMBB, DL, TII->get(TargetOpcode::IMPLICIT_DEF), Undef);
13109 BuildMI(mainMBB, DL, TII->get(TargetOpcode::INSERT_SUBREG), SrcReg32)
13112 .addImm(X86::sub_8bit);
13113 BuildMI(mainMBB, DL, TII->get(TargetOpcode::INSERT_SUBREG), AccReg32)
13116 .addImm(X86::sub_8bit);
13118 BuildMI(mainMBB, DL, TII->get(CMOVOpc), Tmp)
13122 BuildMI(mainMBB, DL, TII->get(TargetOpcode::COPY), t2)
13123 .addReg(Tmp, 0, X86::sub_8bit);
13126 // Use pseudo select and lower them.
13127 assert((VT == MVT::i8 || VT == MVT::i16 || VT == MVT::i32) &&
13128 "Invalid atomic-load-op transformation!");
13129 unsigned SelOpc = getPseudoCMOVOpc(VT);
13130 X86::CondCode CC = X86::getCondFromCMovOpc(CMOVOpc);
13131 assert(CC != X86::COND_INVALID && "Invalid atomic-load-op transformation!");
13132 MIB = BuildMI(mainMBB, DL, TII->get(SelOpc), t2)
13133 .addReg(SrcReg).addReg(t4)
13135 mainMBB = EmitLoweredSelect(MIB, mainMBB);
13136 // Replace the original PHI node as mainMBB is changed after CMOV
13138 BuildMI(*origMainMBB, Phi, DL, TII->get(X86::PHI), t4)
13139 .addReg(t1).addMBB(thisMBB).addReg(t3).addMBB(mainMBB);
13140 Phi->eraseFromParent();
13146 // Copy PhyReg back from virtual register.
13147 BuildMI(mainMBB, DL, TII->get(TargetOpcode::COPY), PhyReg)
13150 MIB = BuildMI(mainMBB, DL, TII->get(LCMPXCHGOpc));
13151 for (unsigned i = 0; i < X86::AddrNumOperands; ++i) {
13152 MachineOperand NewMO = MI->getOperand(MemOpndSlot + i);
13154 NewMO.setIsKill(false);
13155 MIB.addOperand(NewMO);
13158 MIB.setMemRefs(MMOBegin, MMOEnd);
13160 // Copy PhyReg back to virtual register.
13161 BuildMI(mainMBB, DL, TII->get(TargetOpcode::COPY), t3)
13164 BuildMI(mainMBB, DL, TII->get(X86::JNE_4)).addMBB(origMainMBB);
13166 mainMBB->addSuccessor(origMainMBB);
13167 mainMBB->addSuccessor(sinkMBB);
13170 BuildMI(*sinkMBB, sinkMBB->begin(), DL,
13171 TII->get(TargetOpcode::COPY), DstReg)
13174 MI->eraseFromParent();
13178 // EmitAtomicLoadArith6432 - emit the code sequence for pseudo atomic
13179 // instructions. They will be translated into a spin-loop or compare-exchange
13183 // dst = atomic-fetch-op MI.addr, MI.val
13189 // t1L = LOAD [MI.addr + 0]
13190 // t1H = LOAD [MI.addr + 4]
13192 // t4L = phi(t1L, t3L / loop)
13193 // t4H = phi(t1H, t3H / loop)
13194 // t2L = OP MI.val.lo, t4L
13195 // t2H = OP MI.val.hi, t4H
13200 // LCMPXCHG8B [MI.addr], [ECX:EBX & EDX:EAX are implicitly used and EDX:EAX is implicitly defined]
13208 MachineBasicBlock *
13209 X86TargetLowering::EmitAtomicLoadArith6432(MachineInstr *MI,
13210 MachineBasicBlock *MBB) const {
13211 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
13212 DebugLoc DL = MI->getDebugLoc();
13214 MachineFunction *MF = MBB->getParent();
13215 MachineRegisterInfo &MRI = MF->getRegInfo();
13217 const BasicBlock *BB = MBB->getBasicBlock();
13218 MachineFunction::iterator I = MBB;
13221 assert(MI->getNumOperands() <= X86::AddrNumOperands + 7 &&
13222 "Unexpected number of operands");
13224 assert(MI->hasOneMemOperand() &&
13225 "Expected atomic-load-op32 to have one memoperand");
13227 // Memory Reference
13228 MachineInstr::mmo_iterator MMOBegin = MI->memoperands_begin();
13229 MachineInstr::mmo_iterator MMOEnd = MI->memoperands_end();
13231 unsigned DstLoReg, DstHiReg;
13232 unsigned SrcLoReg, SrcHiReg;
13233 unsigned MemOpndSlot;
13235 unsigned CurOp = 0;
13237 DstLoReg = MI->getOperand(CurOp++).getReg();
13238 DstHiReg = MI->getOperand(CurOp++).getReg();
13239 MemOpndSlot = CurOp;
13240 CurOp += X86::AddrNumOperands;
13241 SrcLoReg = MI->getOperand(CurOp++).getReg();
13242 SrcHiReg = MI->getOperand(CurOp++).getReg();
13244 const TargetRegisterClass *RC = &X86::GR32RegClass;
13245 const TargetRegisterClass *RC8 = &X86::GR8RegClass;
13247 unsigned t1L = MRI.createVirtualRegister(RC);
13248 unsigned t1H = MRI.createVirtualRegister(RC);
13249 unsigned t2L = MRI.createVirtualRegister(RC);
13250 unsigned t2H = MRI.createVirtualRegister(RC);
13251 unsigned t3L = MRI.createVirtualRegister(RC);
13252 unsigned t3H = MRI.createVirtualRegister(RC);
13253 unsigned t4L = MRI.createVirtualRegister(RC);
13254 unsigned t4H = MRI.createVirtualRegister(RC);
13256 unsigned LCMPXCHGOpc = X86::LCMPXCHG8B;
13257 unsigned LOADOpc = X86::MOV32rm;
13259 // For the atomic load-arith operator, we generate
13262 // t1L = LOAD [MI.addr + 0]
13263 // t1H = LOAD [MI.addr + 4]
13265 // t4L = phi(t1L / thisMBB, t3L / mainMBB)
13266 // t4H = phi(t1H / thisMBB, t3H / mainMBB)
13267 // t2L = OP MI.val.lo, t4L
13268 // t2H = OP MI.val.hi, t4H
13271 // LCMPXCHG8B [MI.addr], [ECX:EBX & EDX:EAX are implicitly used and EDX:EAX is implicitly defined]
13279 MachineBasicBlock *thisMBB = MBB;
13280 MachineBasicBlock *mainMBB = MF->CreateMachineBasicBlock(BB);
13281 MachineBasicBlock *sinkMBB = MF->CreateMachineBasicBlock(BB);
13282 MF->insert(I, mainMBB);
13283 MF->insert(I, sinkMBB);
13285 MachineInstrBuilder MIB;
13287 // Transfer the remainder of BB and its successor edges to sinkMBB.
13288 sinkMBB->splice(sinkMBB->begin(), MBB,
13289 llvm::next(MachineBasicBlock::iterator(MI)), MBB->end());
13290 sinkMBB->transferSuccessorsAndUpdatePHIs(MBB);
13294 MIB = BuildMI(thisMBB, DL, TII->get(LOADOpc), t1L);
13295 for (unsigned i = 0; i < X86::AddrNumOperands; ++i) {
13296 MachineOperand NewMO = MI->getOperand(MemOpndSlot + i);
13298 NewMO.setIsKill(false);
13299 MIB.addOperand(NewMO);
13301 for (MachineInstr::mmo_iterator MMOI = MMOBegin; MMOI != MMOEnd; ++MMOI) {
13302 unsigned flags = (*MMOI)->getFlags();
13303 flags = (flags & ~MachineMemOperand::MOStore) | MachineMemOperand::MOLoad;
13304 MachineMemOperand *MMO =
13305 MF->getMachineMemOperand((*MMOI)->getPointerInfo(), flags,
13306 (*MMOI)->getSize(),
13307 (*MMOI)->getBaseAlignment(),
13308 (*MMOI)->getTBAAInfo(),
13309 (*MMOI)->getRanges());
13310 MIB.addMemOperand(MMO);
13312 MachineInstr *LowMI = MIB;
13315 MIB = BuildMI(thisMBB, DL, TII->get(LOADOpc), t1H);
13316 for (unsigned i = 0; i < X86::AddrNumOperands; ++i) {
13317 if (i == X86::AddrDisp) {
13318 MIB.addDisp(MI->getOperand(MemOpndSlot + i), 4); // 4 == sizeof(i32)
13320 MachineOperand NewMO = MI->getOperand(MemOpndSlot + i);
13322 NewMO.setIsKill(false);
13323 MIB.addOperand(NewMO);
13326 MIB.setMemRefs(LowMI->memoperands_begin(), LowMI->memoperands_end());
13328 thisMBB->addSuccessor(mainMBB);
13331 MachineBasicBlock *origMainMBB = mainMBB;
13334 MachineInstr *PhiL = BuildMI(mainMBB, DL, TII->get(X86::PHI), t4L)
13335 .addReg(t1L).addMBB(thisMBB).addReg(t3L).addMBB(mainMBB);
13336 MachineInstr *PhiH = BuildMI(mainMBB, DL, TII->get(X86::PHI), t4H)
13337 .addReg(t1H).addMBB(thisMBB).addReg(t3H).addMBB(mainMBB);
13339 unsigned Opc = MI->getOpcode();
13342 llvm_unreachable("Unhandled atomic-load-op6432 opcode!");
13343 case X86::ATOMAND6432:
13344 case X86::ATOMOR6432:
13345 case X86::ATOMXOR6432:
13346 case X86::ATOMADD6432:
13347 case X86::ATOMSUB6432: {
13349 unsigned LoOpc = getNonAtomic6432Opcode(Opc, HiOpc);
13350 BuildMI(mainMBB, DL, TII->get(LoOpc), t2L).addReg(t4L)
13352 BuildMI(mainMBB, DL, TII->get(HiOpc), t2H).addReg(t4H)
13356 case X86::ATOMNAND6432: {
13357 unsigned HiOpc, NOTOpc;
13358 unsigned LoOpc = getNonAtomic6432OpcodeWithExtraOpc(Opc, HiOpc, NOTOpc);
13359 unsigned TmpL = MRI.createVirtualRegister(RC);
13360 unsigned TmpH = MRI.createVirtualRegister(RC);
13361 BuildMI(mainMBB, DL, TII->get(LoOpc), TmpL).addReg(SrcLoReg)
13363 BuildMI(mainMBB, DL, TII->get(HiOpc), TmpH).addReg(SrcHiReg)
13365 BuildMI(mainMBB, DL, TII->get(NOTOpc), t2L).addReg(TmpL);
13366 BuildMI(mainMBB, DL, TII->get(NOTOpc), t2H).addReg(TmpH);
13369 case X86::ATOMMAX6432:
13370 case X86::ATOMMIN6432:
13371 case X86::ATOMUMAX6432:
13372 case X86::ATOMUMIN6432: {
13374 unsigned LoOpc = getNonAtomic6432Opcode(Opc, HiOpc);
13375 unsigned cL = MRI.createVirtualRegister(RC8);
13376 unsigned cH = MRI.createVirtualRegister(RC8);
13377 unsigned cL32 = MRI.createVirtualRegister(RC);
13378 unsigned cH32 = MRI.createVirtualRegister(RC);
13379 unsigned cc = MRI.createVirtualRegister(RC);
13380 // cl := cmp src_lo, lo
13381 BuildMI(mainMBB, DL, TII->get(X86::CMP32rr))
13382 .addReg(SrcLoReg).addReg(t4L);
13383 BuildMI(mainMBB, DL, TII->get(LoOpc), cL);
13384 BuildMI(mainMBB, DL, TII->get(X86::MOVZX32rr8), cL32).addReg(cL);
13385 // ch := cmp src_hi, hi
13386 BuildMI(mainMBB, DL, TII->get(X86::CMP32rr))
13387 .addReg(SrcHiReg).addReg(t4H);
13388 BuildMI(mainMBB, DL, TII->get(HiOpc), cH);
13389 BuildMI(mainMBB, DL, TII->get(X86::MOVZX32rr8), cH32).addReg(cH);
13390 // cc := if (src_hi == hi) ? cl : ch;
13391 if (Subtarget->hasCMov()) {
13392 BuildMI(mainMBB, DL, TII->get(X86::CMOVE32rr), cc)
13393 .addReg(cH32).addReg(cL32);
13395 MIB = BuildMI(mainMBB, DL, TII->get(X86::CMOV_GR32), cc)
13396 .addReg(cH32).addReg(cL32)
13397 .addImm(X86::COND_E);
13398 mainMBB = EmitLoweredSelect(MIB, mainMBB);
13400 BuildMI(mainMBB, DL, TII->get(X86::TEST32rr)).addReg(cc).addReg(cc);
13401 if (Subtarget->hasCMov()) {
13402 BuildMI(mainMBB, DL, TII->get(X86::CMOVNE32rr), t2L)
13403 .addReg(SrcLoReg).addReg(t4L);
13404 BuildMI(mainMBB, DL, TII->get(X86::CMOVNE32rr), t2H)
13405 .addReg(SrcHiReg).addReg(t4H);
13407 MIB = BuildMI(mainMBB, DL, TII->get(X86::CMOV_GR32), t2L)
13408 .addReg(SrcLoReg).addReg(t4L)
13409 .addImm(X86::COND_NE);
13410 mainMBB = EmitLoweredSelect(MIB, mainMBB);
13411 // As the lowered CMOV won't clobber EFLAGS, we could reuse it for the
13412 // 2nd CMOV lowering.
13413 mainMBB->addLiveIn(X86::EFLAGS);
13414 MIB = BuildMI(mainMBB, DL, TII->get(X86::CMOV_GR32), t2H)
13415 .addReg(SrcHiReg).addReg(t4H)
13416 .addImm(X86::COND_NE);
13417 mainMBB = EmitLoweredSelect(MIB, mainMBB);
13418 // Replace the original PHI node as mainMBB is changed after CMOV
13420 BuildMI(*origMainMBB, PhiL, DL, TII->get(X86::PHI), t4L)
13421 .addReg(t1L).addMBB(thisMBB).addReg(t3L).addMBB(mainMBB);
13422 BuildMI(*origMainMBB, PhiH, DL, TII->get(X86::PHI), t4H)
13423 .addReg(t1H).addMBB(thisMBB).addReg(t3H).addMBB(mainMBB);
13424 PhiL->eraseFromParent();
13425 PhiH->eraseFromParent();
13429 case X86::ATOMSWAP6432: {
13431 unsigned LoOpc = getNonAtomic6432Opcode(Opc, HiOpc);
13432 BuildMI(mainMBB, DL, TII->get(LoOpc), t2L).addReg(SrcLoReg);
13433 BuildMI(mainMBB, DL, TII->get(HiOpc), t2H).addReg(SrcHiReg);
13438 // Copy EDX:EAX back from HiReg:LoReg
13439 BuildMI(mainMBB, DL, TII->get(TargetOpcode::COPY), X86::EAX).addReg(t4L);
13440 BuildMI(mainMBB, DL, TII->get(TargetOpcode::COPY), X86::EDX).addReg(t4H);
13441 // Copy ECX:EBX from t1H:t1L
13442 BuildMI(mainMBB, DL, TII->get(TargetOpcode::COPY), X86::EBX).addReg(t2L);
13443 BuildMI(mainMBB, DL, TII->get(TargetOpcode::COPY), X86::ECX).addReg(t2H);
13445 MIB = BuildMI(mainMBB, DL, TII->get(LCMPXCHGOpc));
13446 for (unsigned i = 0; i < X86::AddrNumOperands; ++i) {
13447 MachineOperand NewMO = MI->getOperand(MemOpndSlot + i);
13449 NewMO.setIsKill(false);
13450 MIB.addOperand(NewMO);
13452 MIB.setMemRefs(MMOBegin, MMOEnd);
13454 // Copy EDX:EAX back to t3H:t3L
13455 BuildMI(mainMBB, DL, TII->get(TargetOpcode::COPY), t3L).addReg(X86::EAX);
13456 BuildMI(mainMBB, DL, TII->get(TargetOpcode::COPY), t3H).addReg(X86::EDX);
13458 BuildMI(mainMBB, DL, TII->get(X86::JNE_4)).addMBB(origMainMBB);
13460 mainMBB->addSuccessor(origMainMBB);
13461 mainMBB->addSuccessor(sinkMBB);
13464 BuildMI(*sinkMBB, sinkMBB->begin(), DL,
13465 TII->get(TargetOpcode::COPY), DstLoReg)
13467 BuildMI(*sinkMBB, sinkMBB->begin(), DL,
13468 TII->get(TargetOpcode::COPY), DstHiReg)
13471 MI->eraseFromParent();
13475 // FIXME: When we get size specific XMM0 registers, i.e. XMM0_V16I8
13476 // or XMM0_V32I8 in AVX all of this code can be replaced with that
13477 // in the .td file.
13478 static MachineBasicBlock *EmitPCMPSTRM(MachineInstr *MI, MachineBasicBlock *BB,
13479 const TargetInstrInfo *TII) {
13481 switch (MI->getOpcode()) {
13482 default: llvm_unreachable("illegal opcode!");
13483 case X86::PCMPISTRM128REG: Opc = X86::PCMPISTRM128rr; break;
13484 case X86::VPCMPISTRM128REG: Opc = X86::VPCMPISTRM128rr; break;
13485 case X86::PCMPISTRM128MEM: Opc = X86::PCMPISTRM128rm; break;
13486 case X86::VPCMPISTRM128MEM: Opc = X86::VPCMPISTRM128rm; break;
13487 case X86::PCMPESTRM128REG: Opc = X86::PCMPESTRM128rr; break;
13488 case X86::VPCMPESTRM128REG: Opc = X86::VPCMPESTRM128rr; break;
13489 case X86::PCMPESTRM128MEM: Opc = X86::PCMPESTRM128rm; break;
13490 case X86::VPCMPESTRM128MEM: Opc = X86::VPCMPESTRM128rm; break;
13493 DebugLoc dl = MI->getDebugLoc();
13494 MachineInstrBuilder MIB = BuildMI(*BB, MI, dl, TII->get(Opc));
13496 unsigned NumArgs = MI->getNumOperands();
13497 for (unsigned i = 1; i < NumArgs; ++i) {
13498 MachineOperand &Op = MI->getOperand(i);
13499 if (!(Op.isReg() && Op.isImplicit()))
13500 MIB.addOperand(Op);
13502 if (MI->hasOneMemOperand())
13503 MIB->setMemRefs(MI->memoperands_begin(), MI->memoperands_end());
13505 BuildMI(*BB, MI, dl,
13506 TII->get(TargetOpcode::COPY), MI->getOperand(0).getReg())
13507 .addReg(X86::XMM0);
13509 MI->eraseFromParent();
13513 // FIXME: Custom handling because TableGen doesn't support multiple implicit
13514 // defs in an instruction pattern
13515 static MachineBasicBlock *EmitPCMPSTRI(MachineInstr *MI, MachineBasicBlock *BB,
13516 const TargetInstrInfo *TII) {
13518 switch (MI->getOpcode()) {
13519 default: llvm_unreachable("illegal opcode!");
13520 case X86::PCMPISTRIREG: Opc = X86::PCMPISTRIrr; break;
13521 case X86::VPCMPISTRIREG: Opc = X86::VPCMPISTRIrr; break;
13522 case X86::PCMPISTRIMEM: Opc = X86::PCMPISTRIrm; break;
13523 case X86::VPCMPISTRIMEM: Opc = X86::VPCMPISTRIrm; break;
13524 case X86::PCMPESTRIREG: Opc = X86::PCMPESTRIrr; break;
13525 case X86::VPCMPESTRIREG: Opc = X86::VPCMPESTRIrr; break;
13526 case X86::PCMPESTRIMEM: Opc = X86::PCMPESTRIrm; break;
13527 case X86::VPCMPESTRIMEM: Opc = X86::VPCMPESTRIrm; break;
13530 DebugLoc dl = MI->getDebugLoc();
13531 MachineInstrBuilder MIB = BuildMI(*BB, MI, dl, TII->get(Opc));
13533 unsigned NumArgs = MI->getNumOperands(); // remove the results
13534 for (unsigned i = 1; i < NumArgs; ++i) {
13535 MachineOperand &Op = MI->getOperand(i);
13536 if (!(Op.isReg() && Op.isImplicit()))
13537 MIB.addOperand(Op);
13539 if (MI->hasOneMemOperand())
13540 MIB->setMemRefs(MI->memoperands_begin(), MI->memoperands_end());
13542 BuildMI(*BB, MI, dl,
13543 TII->get(TargetOpcode::COPY), MI->getOperand(0).getReg())
13546 MI->eraseFromParent();
13550 static MachineBasicBlock * EmitMonitor(MachineInstr *MI, MachineBasicBlock *BB,
13551 const TargetInstrInfo *TII,
13552 const X86Subtarget* Subtarget) {
13553 DebugLoc dl = MI->getDebugLoc();
13555 // Address into RAX/EAX, other two args into ECX, EDX.
13556 unsigned MemOpc = Subtarget->is64Bit() ? X86::LEA64r : X86::LEA32r;
13557 unsigned MemReg = Subtarget->is64Bit() ? X86::RAX : X86::EAX;
13558 MachineInstrBuilder MIB = BuildMI(*BB, MI, dl, TII->get(MemOpc), MemReg);
13559 for (int i = 0; i < X86::AddrNumOperands; ++i)
13560 MIB.addOperand(MI->getOperand(i));
13562 unsigned ValOps = X86::AddrNumOperands;
13563 BuildMI(*BB, MI, dl, TII->get(TargetOpcode::COPY), X86::ECX)
13564 .addReg(MI->getOperand(ValOps).getReg());
13565 BuildMI(*BB, MI, dl, TII->get(TargetOpcode::COPY), X86::EDX)
13566 .addReg(MI->getOperand(ValOps+1).getReg());
13568 // The instruction doesn't actually take any operands though.
13569 BuildMI(*BB, MI, dl, TII->get(X86::MONITORrrr));
13571 MI->eraseFromParent(); // The pseudo is gone now.
13575 MachineBasicBlock *
13576 X86TargetLowering::EmitVAARG64WithCustomInserter(
13578 MachineBasicBlock *MBB) const {
13579 // Emit va_arg instruction on X86-64.
13581 // Operands to this pseudo-instruction:
13582 // 0 ) Output : destination address (reg)
13583 // 1-5) Input : va_list address (addr, i64mem)
13584 // 6 ) ArgSize : Size (in bytes) of vararg type
13585 // 7 ) ArgMode : 0=overflow only, 1=use gp_offset, 2=use fp_offset
13586 // 8 ) Align : Alignment of type
13587 // 9 ) EFLAGS (implicit-def)
13589 assert(MI->getNumOperands() == 10 && "VAARG_64 should have 10 operands!");
13590 assert(X86::AddrNumOperands == 5 && "VAARG_64 assumes 5 address operands");
13592 unsigned DestReg = MI->getOperand(0).getReg();
13593 MachineOperand &Base = MI->getOperand(1);
13594 MachineOperand &Scale = MI->getOperand(2);
13595 MachineOperand &Index = MI->getOperand(3);
13596 MachineOperand &Disp = MI->getOperand(4);
13597 MachineOperand &Segment = MI->getOperand(5);
13598 unsigned ArgSize = MI->getOperand(6).getImm();
13599 unsigned ArgMode = MI->getOperand(7).getImm();
13600 unsigned Align = MI->getOperand(8).getImm();
13602 // Memory Reference
13603 assert(MI->hasOneMemOperand() && "Expected VAARG_64 to have one memoperand");
13604 MachineInstr::mmo_iterator MMOBegin = MI->memoperands_begin();
13605 MachineInstr::mmo_iterator MMOEnd = MI->memoperands_end();
13607 // Machine Information
13608 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
13609 MachineRegisterInfo &MRI = MBB->getParent()->getRegInfo();
13610 const TargetRegisterClass *AddrRegClass = getRegClassFor(MVT::i64);
13611 const TargetRegisterClass *OffsetRegClass = getRegClassFor(MVT::i32);
13612 DebugLoc DL = MI->getDebugLoc();
13614 // struct va_list {
13617 // i64 overflow_area (address)
13618 // i64 reg_save_area (address)
13620 // sizeof(va_list) = 24
13621 // alignment(va_list) = 8
13623 unsigned TotalNumIntRegs = 6;
13624 unsigned TotalNumXMMRegs = 8;
13625 bool UseGPOffset = (ArgMode == 1);
13626 bool UseFPOffset = (ArgMode == 2);
13627 unsigned MaxOffset = TotalNumIntRegs * 8 +
13628 (UseFPOffset ? TotalNumXMMRegs * 16 : 0);
13630 /* Align ArgSize to a multiple of 8 */
13631 unsigned ArgSizeA8 = (ArgSize + 7) & ~7;
13632 bool NeedsAlign = (Align > 8);
13634 MachineBasicBlock *thisMBB = MBB;
13635 MachineBasicBlock *overflowMBB;
13636 MachineBasicBlock *offsetMBB;
13637 MachineBasicBlock *endMBB;
13639 unsigned OffsetDestReg = 0; // Argument address computed by offsetMBB
13640 unsigned OverflowDestReg = 0; // Argument address computed by overflowMBB
13641 unsigned OffsetReg = 0;
13643 if (!UseGPOffset && !UseFPOffset) {
13644 // If we only pull from the overflow region, we don't create a branch.
13645 // We don't need to alter control flow.
13646 OffsetDestReg = 0; // unused
13647 OverflowDestReg = DestReg;
13650 overflowMBB = thisMBB;
13653 // First emit code to check if gp_offset (or fp_offset) is below the bound.
13654 // If so, pull the argument from reg_save_area. (branch to offsetMBB)
13655 // If not, pull from overflow_area. (branch to overflowMBB)
13660 // offsetMBB overflowMBB
13665 // Registers for the PHI in endMBB
13666 OffsetDestReg = MRI.createVirtualRegister(AddrRegClass);
13667 OverflowDestReg = MRI.createVirtualRegister(AddrRegClass);
13669 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
13670 MachineFunction *MF = MBB->getParent();
13671 overflowMBB = MF->CreateMachineBasicBlock(LLVM_BB);
13672 offsetMBB = MF->CreateMachineBasicBlock(LLVM_BB);
13673 endMBB = MF->CreateMachineBasicBlock(LLVM_BB);
13675 MachineFunction::iterator MBBIter = MBB;
13678 // Insert the new basic blocks
13679 MF->insert(MBBIter, offsetMBB);
13680 MF->insert(MBBIter, overflowMBB);
13681 MF->insert(MBBIter, endMBB);
13683 // Transfer the remainder of MBB and its successor edges to endMBB.
13684 endMBB->splice(endMBB->begin(), thisMBB,
13685 llvm::next(MachineBasicBlock::iterator(MI)),
13687 endMBB->transferSuccessorsAndUpdatePHIs(thisMBB);
13689 // Make offsetMBB and overflowMBB successors of thisMBB
13690 thisMBB->addSuccessor(offsetMBB);
13691 thisMBB->addSuccessor(overflowMBB);
13693 // endMBB is a successor of both offsetMBB and overflowMBB
13694 offsetMBB->addSuccessor(endMBB);
13695 overflowMBB->addSuccessor(endMBB);
13697 // Load the offset value into a register
13698 OffsetReg = MRI.createVirtualRegister(OffsetRegClass);
13699 BuildMI(thisMBB, DL, TII->get(X86::MOV32rm), OffsetReg)
13703 .addDisp(Disp, UseFPOffset ? 4 : 0)
13704 .addOperand(Segment)
13705 .setMemRefs(MMOBegin, MMOEnd);
13707 // Check if there is enough room left to pull this argument.
13708 BuildMI(thisMBB, DL, TII->get(X86::CMP32ri))
13710 .addImm(MaxOffset + 8 - ArgSizeA8);
13712 // Branch to "overflowMBB" if offset >= max
13713 // Fall through to "offsetMBB" otherwise
13714 BuildMI(thisMBB, DL, TII->get(X86::GetCondBranchFromCond(X86::COND_AE)))
13715 .addMBB(overflowMBB);
13718 // In offsetMBB, emit code to use the reg_save_area.
13720 assert(OffsetReg != 0);
13722 // Read the reg_save_area address.
13723 unsigned RegSaveReg = MRI.createVirtualRegister(AddrRegClass);
13724 BuildMI(offsetMBB, DL, TII->get(X86::MOV64rm), RegSaveReg)
13729 .addOperand(Segment)
13730 .setMemRefs(MMOBegin, MMOEnd);
13732 // Zero-extend the offset
13733 unsigned OffsetReg64 = MRI.createVirtualRegister(AddrRegClass);
13734 BuildMI(offsetMBB, DL, TII->get(X86::SUBREG_TO_REG), OffsetReg64)
13737 .addImm(X86::sub_32bit);
13739 // Add the offset to the reg_save_area to get the final address.
13740 BuildMI(offsetMBB, DL, TII->get(X86::ADD64rr), OffsetDestReg)
13741 .addReg(OffsetReg64)
13742 .addReg(RegSaveReg);
13744 // Compute the offset for the next argument
13745 unsigned NextOffsetReg = MRI.createVirtualRegister(OffsetRegClass);
13746 BuildMI(offsetMBB, DL, TII->get(X86::ADD32ri), NextOffsetReg)
13748 .addImm(UseFPOffset ? 16 : 8);
13750 // Store it back into the va_list.
13751 BuildMI(offsetMBB, DL, TII->get(X86::MOV32mr))
13755 .addDisp(Disp, UseFPOffset ? 4 : 0)
13756 .addOperand(Segment)
13757 .addReg(NextOffsetReg)
13758 .setMemRefs(MMOBegin, MMOEnd);
13761 BuildMI(offsetMBB, DL, TII->get(X86::JMP_4))
13766 // Emit code to use overflow area
13769 // Load the overflow_area address into a register.
13770 unsigned OverflowAddrReg = MRI.createVirtualRegister(AddrRegClass);
13771 BuildMI(overflowMBB, DL, TII->get(X86::MOV64rm), OverflowAddrReg)
13776 .addOperand(Segment)
13777 .setMemRefs(MMOBegin, MMOEnd);
13779 // If we need to align it, do so. Otherwise, just copy the address
13780 // to OverflowDestReg.
13782 // Align the overflow address
13783 assert((Align & (Align-1)) == 0 && "Alignment must be a power of 2");
13784 unsigned TmpReg = MRI.createVirtualRegister(AddrRegClass);
13786 // aligned_addr = (addr + (align-1)) & ~(align-1)
13787 BuildMI(overflowMBB, DL, TII->get(X86::ADD64ri32), TmpReg)
13788 .addReg(OverflowAddrReg)
13791 BuildMI(overflowMBB, DL, TII->get(X86::AND64ri32), OverflowDestReg)
13793 .addImm(~(uint64_t)(Align-1));
13795 BuildMI(overflowMBB, DL, TII->get(TargetOpcode::COPY), OverflowDestReg)
13796 .addReg(OverflowAddrReg);
13799 // Compute the next overflow address after this argument.
13800 // (the overflow address should be kept 8-byte aligned)
13801 unsigned NextAddrReg = MRI.createVirtualRegister(AddrRegClass);
13802 BuildMI(overflowMBB, DL, TII->get(X86::ADD64ri32), NextAddrReg)
13803 .addReg(OverflowDestReg)
13804 .addImm(ArgSizeA8);
13806 // Store the new overflow address.
13807 BuildMI(overflowMBB, DL, TII->get(X86::MOV64mr))
13812 .addOperand(Segment)
13813 .addReg(NextAddrReg)
13814 .setMemRefs(MMOBegin, MMOEnd);
13816 // If we branched, emit the PHI to the front of endMBB.
13818 BuildMI(*endMBB, endMBB->begin(), DL,
13819 TII->get(X86::PHI), DestReg)
13820 .addReg(OffsetDestReg).addMBB(offsetMBB)
13821 .addReg(OverflowDestReg).addMBB(overflowMBB);
13824 // Erase the pseudo instruction
13825 MI->eraseFromParent();
13830 MachineBasicBlock *
13831 X86TargetLowering::EmitVAStartSaveXMMRegsWithCustomInserter(
13833 MachineBasicBlock *MBB) const {
13834 // Emit code to save XMM registers to the stack. The ABI says that the
13835 // number of registers to save is given in %al, so it's theoretically
13836 // possible to do an indirect jump trick to avoid saving all of them,
13837 // however this code takes a simpler approach and just executes all
13838 // of the stores if %al is non-zero. It's less code, and it's probably
13839 // easier on the hardware branch predictor, and stores aren't all that
13840 // expensive anyway.
13842 // Create the new basic blocks. One block contains all the XMM stores,
13843 // and one block is the final destination regardless of whether any
13844 // stores were performed.
13845 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
13846 MachineFunction *F = MBB->getParent();
13847 MachineFunction::iterator MBBIter = MBB;
13849 MachineBasicBlock *XMMSaveMBB = F->CreateMachineBasicBlock(LLVM_BB);
13850 MachineBasicBlock *EndMBB = F->CreateMachineBasicBlock(LLVM_BB);
13851 F->insert(MBBIter, XMMSaveMBB);
13852 F->insert(MBBIter, EndMBB);
13854 // Transfer the remainder of MBB and its successor edges to EndMBB.
13855 EndMBB->splice(EndMBB->begin(), MBB,
13856 llvm::next(MachineBasicBlock::iterator(MI)),
13858 EndMBB->transferSuccessorsAndUpdatePHIs(MBB);
13860 // The original block will now fall through to the XMM save block.
13861 MBB->addSuccessor(XMMSaveMBB);
13862 // The XMMSaveMBB will fall through to the end block.
13863 XMMSaveMBB->addSuccessor(EndMBB);
13865 // Now add the instructions.
13866 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
13867 DebugLoc DL = MI->getDebugLoc();
13869 unsigned CountReg = MI->getOperand(0).getReg();
13870 int64_t RegSaveFrameIndex = MI->getOperand(1).getImm();
13871 int64_t VarArgsFPOffset = MI->getOperand(2).getImm();
13873 if (!Subtarget->isTargetWin64()) {
13874 // If %al is 0, branch around the XMM save block.
13875 BuildMI(MBB, DL, TII->get(X86::TEST8rr)).addReg(CountReg).addReg(CountReg);
13876 BuildMI(MBB, DL, TII->get(X86::JE_4)).addMBB(EndMBB);
13877 MBB->addSuccessor(EndMBB);
13880 unsigned MOVOpc = Subtarget->hasFp256() ? X86::VMOVAPSmr : X86::MOVAPSmr;
13881 // In the XMM save block, save all the XMM argument registers.
13882 for (int i = 3, e = MI->getNumOperands(); i != e; ++i) {
13883 int64_t Offset = (i - 3) * 16 + VarArgsFPOffset;
13884 MachineMemOperand *MMO =
13885 F->getMachineMemOperand(
13886 MachinePointerInfo::getFixedStack(RegSaveFrameIndex, Offset),
13887 MachineMemOperand::MOStore,
13888 /*Size=*/16, /*Align=*/16);
13889 BuildMI(XMMSaveMBB, DL, TII->get(MOVOpc))
13890 .addFrameIndex(RegSaveFrameIndex)
13891 .addImm(/*Scale=*/1)
13892 .addReg(/*IndexReg=*/0)
13893 .addImm(/*Disp=*/Offset)
13894 .addReg(/*Segment=*/0)
13895 .addReg(MI->getOperand(i).getReg())
13896 .addMemOperand(MMO);
13899 MI->eraseFromParent(); // The pseudo instruction is gone now.
13904 // The EFLAGS operand of SelectItr might be missing a kill marker
13905 // because there were multiple uses of EFLAGS, and ISel didn't know
13906 // which to mark. Figure out whether SelectItr should have had a
13907 // kill marker, and set it if it should. Returns the correct kill
13909 static bool checkAndUpdateEFLAGSKill(MachineBasicBlock::iterator SelectItr,
13910 MachineBasicBlock* BB,
13911 const TargetRegisterInfo* TRI) {
13912 // Scan forward through BB for a use/def of EFLAGS.
13913 MachineBasicBlock::iterator miI(llvm::next(SelectItr));
13914 for (MachineBasicBlock::iterator miE = BB->end(); miI != miE; ++miI) {
13915 const MachineInstr& mi = *miI;
13916 if (mi.readsRegister(X86::EFLAGS))
13918 if (mi.definesRegister(X86::EFLAGS))
13919 break; // Should have kill-flag - update below.
13922 // If we hit the end of the block, check whether EFLAGS is live into a
13924 if (miI == BB->end()) {
13925 for (MachineBasicBlock::succ_iterator sItr = BB->succ_begin(),
13926 sEnd = BB->succ_end();
13927 sItr != sEnd; ++sItr) {
13928 MachineBasicBlock* succ = *sItr;
13929 if (succ->isLiveIn(X86::EFLAGS))
13934 // We found a def, or hit the end of the basic block and EFLAGS wasn't live
13935 // out. SelectMI should have a kill flag on EFLAGS.
13936 SelectItr->addRegisterKilled(X86::EFLAGS, TRI);
13940 MachineBasicBlock *
13941 X86TargetLowering::EmitLoweredSelect(MachineInstr *MI,
13942 MachineBasicBlock *BB) const {
13943 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
13944 DebugLoc DL = MI->getDebugLoc();
13946 // To "insert" a SELECT_CC instruction, we actually have to insert the
13947 // diamond control-flow pattern. The incoming instruction knows the
13948 // destination vreg to set, the condition code register to branch on, the
13949 // true/false values to select between, and a branch opcode to use.
13950 const BasicBlock *LLVM_BB = BB->getBasicBlock();
13951 MachineFunction::iterator It = BB;
13957 // cmpTY ccX, r1, r2
13959 // fallthrough --> copy0MBB
13960 MachineBasicBlock *thisMBB = BB;
13961 MachineFunction *F = BB->getParent();
13962 MachineBasicBlock *copy0MBB = F->CreateMachineBasicBlock(LLVM_BB);
13963 MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB);
13964 F->insert(It, copy0MBB);
13965 F->insert(It, sinkMBB);
13967 // If the EFLAGS register isn't dead in the terminator, then claim that it's
13968 // live into the sink and copy blocks.
13969 const TargetRegisterInfo* TRI = getTargetMachine().getRegisterInfo();
13970 if (!MI->killsRegister(X86::EFLAGS) &&
13971 !checkAndUpdateEFLAGSKill(MI, BB, TRI)) {
13972 copy0MBB->addLiveIn(X86::EFLAGS);
13973 sinkMBB->addLiveIn(X86::EFLAGS);
13976 // Transfer the remainder of BB and its successor edges to sinkMBB.
13977 sinkMBB->splice(sinkMBB->begin(), BB,
13978 llvm::next(MachineBasicBlock::iterator(MI)),
13980 sinkMBB->transferSuccessorsAndUpdatePHIs(BB);
13982 // Add the true and fallthrough blocks as its successors.
13983 BB->addSuccessor(copy0MBB);
13984 BB->addSuccessor(sinkMBB);
13986 // Create the conditional branch instruction.
13988 X86::GetCondBranchFromCond((X86::CondCode)MI->getOperand(3).getImm());
13989 BuildMI(BB, DL, TII->get(Opc)).addMBB(sinkMBB);
13992 // %FalseValue = ...
13993 // # fallthrough to sinkMBB
13994 copy0MBB->addSuccessor(sinkMBB);
13997 // %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
13999 BuildMI(*sinkMBB, sinkMBB->begin(), DL,
14000 TII->get(X86::PHI), MI->getOperand(0).getReg())
14001 .addReg(MI->getOperand(1).getReg()).addMBB(copy0MBB)
14002 .addReg(MI->getOperand(2).getReg()).addMBB(thisMBB);
14004 MI->eraseFromParent(); // The pseudo instruction is gone now.
14008 MachineBasicBlock *
14009 X86TargetLowering::EmitLoweredSegAlloca(MachineInstr *MI, MachineBasicBlock *BB,
14010 bool Is64Bit) const {
14011 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
14012 DebugLoc DL = MI->getDebugLoc();
14013 MachineFunction *MF = BB->getParent();
14014 const BasicBlock *LLVM_BB = BB->getBasicBlock();
14016 assert(getTargetMachine().Options.EnableSegmentedStacks);
14018 unsigned TlsReg = Is64Bit ? X86::FS : X86::GS;
14019 unsigned TlsOffset = Is64Bit ? 0x70 : 0x30;
14022 // ... [Till the alloca]
14023 // If stacklet is not large enough, jump to mallocMBB
14026 // Allocate by subtracting from RSP
14027 // Jump to continueMBB
14030 // Allocate by call to runtime
14034 // [rest of original BB]
14037 MachineBasicBlock *mallocMBB = MF->CreateMachineBasicBlock(LLVM_BB);
14038 MachineBasicBlock *bumpMBB = MF->CreateMachineBasicBlock(LLVM_BB);
14039 MachineBasicBlock *continueMBB = MF->CreateMachineBasicBlock(LLVM_BB);
14041 MachineRegisterInfo &MRI = MF->getRegInfo();
14042 const TargetRegisterClass *AddrRegClass =
14043 getRegClassFor(Is64Bit ? MVT::i64:MVT::i32);
14045 unsigned mallocPtrVReg = MRI.createVirtualRegister(AddrRegClass),
14046 bumpSPPtrVReg = MRI.createVirtualRegister(AddrRegClass),
14047 tmpSPVReg = MRI.createVirtualRegister(AddrRegClass),
14048 SPLimitVReg = MRI.createVirtualRegister(AddrRegClass),
14049 sizeVReg = MI->getOperand(1).getReg(),
14050 physSPReg = Is64Bit ? X86::RSP : X86::ESP;
14052 MachineFunction::iterator MBBIter = BB;
14055 MF->insert(MBBIter, bumpMBB);
14056 MF->insert(MBBIter, mallocMBB);
14057 MF->insert(MBBIter, continueMBB);
14059 continueMBB->splice(continueMBB->begin(), BB, llvm::next
14060 (MachineBasicBlock::iterator(MI)), BB->end());
14061 continueMBB->transferSuccessorsAndUpdatePHIs(BB);
14063 // Add code to the main basic block to check if the stack limit has been hit,
14064 // and if so, jump to mallocMBB otherwise to bumpMBB.
14065 BuildMI(BB, DL, TII->get(TargetOpcode::COPY), tmpSPVReg).addReg(physSPReg);
14066 BuildMI(BB, DL, TII->get(Is64Bit ? X86::SUB64rr:X86::SUB32rr), SPLimitVReg)
14067 .addReg(tmpSPVReg).addReg(sizeVReg);
14068 BuildMI(BB, DL, TII->get(Is64Bit ? X86::CMP64mr:X86::CMP32mr))
14069 .addReg(0).addImm(1).addReg(0).addImm(TlsOffset).addReg(TlsReg)
14070 .addReg(SPLimitVReg);
14071 BuildMI(BB, DL, TII->get(X86::JG_4)).addMBB(mallocMBB);
14073 // bumpMBB simply decreases the stack pointer, since we know the current
14074 // stacklet has enough space.
14075 BuildMI(bumpMBB, DL, TII->get(TargetOpcode::COPY), physSPReg)
14076 .addReg(SPLimitVReg);
14077 BuildMI(bumpMBB, DL, TII->get(TargetOpcode::COPY), bumpSPPtrVReg)
14078 .addReg(SPLimitVReg);
14079 BuildMI(bumpMBB, DL, TII->get(X86::JMP_4)).addMBB(continueMBB);
14081 // Calls into a routine in libgcc to allocate more space from the heap.
14082 const uint32_t *RegMask =
14083 getTargetMachine().getRegisterInfo()->getCallPreservedMask(CallingConv::C);
14085 BuildMI(mallocMBB, DL, TII->get(X86::MOV64rr), X86::RDI)
14087 BuildMI(mallocMBB, DL, TII->get(X86::CALL64pcrel32))
14088 .addExternalSymbol("__morestack_allocate_stack_space")
14089 .addRegMask(RegMask)
14090 .addReg(X86::RDI, RegState::Implicit)
14091 .addReg(X86::RAX, RegState::ImplicitDefine);
14093 BuildMI(mallocMBB, DL, TII->get(X86::SUB32ri), physSPReg).addReg(physSPReg)
14095 BuildMI(mallocMBB, DL, TII->get(X86::PUSH32r)).addReg(sizeVReg);
14096 BuildMI(mallocMBB, DL, TII->get(X86::CALLpcrel32))
14097 .addExternalSymbol("__morestack_allocate_stack_space")
14098 .addRegMask(RegMask)
14099 .addReg(X86::EAX, RegState::ImplicitDefine);
14103 BuildMI(mallocMBB, DL, TII->get(X86::ADD32ri), physSPReg).addReg(physSPReg)
14106 BuildMI(mallocMBB, DL, TII->get(TargetOpcode::COPY), mallocPtrVReg)
14107 .addReg(Is64Bit ? X86::RAX : X86::EAX);
14108 BuildMI(mallocMBB, DL, TII->get(X86::JMP_4)).addMBB(continueMBB);
14110 // Set up the CFG correctly.
14111 BB->addSuccessor(bumpMBB);
14112 BB->addSuccessor(mallocMBB);
14113 mallocMBB->addSuccessor(continueMBB);
14114 bumpMBB->addSuccessor(continueMBB);
14116 // Take care of the PHI nodes.
14117 BuildMI(*continueMBB, continueMBB->begin(), DL, TII->get(X86::PHI),
14118 MI->getOperand(0).getReg())
14119 .addReg(mallocPtrVReg).addMBB(mallocMBB)
14120 .addReg(bumpSPPtrVReg).addMBB(bumpMBB);
14122 // Delete the original pseudo instruction.
14123 MI->eraseFromParent();
14126 return continueMBB;
14129 MachineBasicBlock *
14130 X86TargetLowering::EmitLoweredWinAlloca(MachineInstr *MI,
14131 MachineBasicBlock *BB) const {
14132 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
14133 DebugLoc DL = MI->getDebugLoc();
14135 assert(!Subtarget->isTargetEnvMacho());
14137 // The lowering is pretty easy: we're just emitting the call to _alloca. The
14138 // non-trivial part is impdef of ESP.
14140 if (Subtarget->isTargetWin64()) {
14141 if (Subtarget->isTargetCygMing()) {
14142 // ___chkstk(Mingw64):
14143 // Clobbers R10, R11, RAX and EFLAGS.
14145 BuildMI(*BB, MI, DL, TII->get(X86::W64ALLOCA))
14146 .addExternalSymbol("___chkstk")
14147 .addReg(X86::RAX, RegState::Implicit)
14148 .addReg(X86::RSP, RegState::Implicit)
14149 .addReg(X86::RAX, RegState::Define | RegState::Implicit)
14150 .addReg(X86::RSP, RegState::Define | RegState::Implicit)
14151 .addReg(X86::EFLAGS, RegState::Define | RegState::Implicit);
14153 // __chkstk(MSVCRT): does not update stack pointer.
14154 // Clobbers R10, R11 and EFLAGS.
14155 // FIXME: RAX(allocated size) might be reused and not killed.
14156 BuildMI(*BB, MI, DL, TII->get(X86::W64ALLOCA))
14157 .addExternalSymbol("__chkstk")
14158 .addReg(X86::RAX, RegState::Implicit)
14159 .addReg(X86::EFLAGS, RegState::Define | RegState::Implicit);
14160 // RAX has the offset to subtracted from RSP.
14161 BuildMI(*BB, MI, DL, TII->get(X86::SUB64rr), X86::RSP)
14166 const char *StackProbeSymbol =
14167 Subtarget->isTargetWindows() ? "_chkstk" : "_alloca";
14169 BuildMI(*BB, MI, DL, TII->get(X86::CALLpcrel32))
14170 .addExternalSymbol(StackProbeSymbol)
14171 .addReg(X86::EAX, RegState::Implicit)
14172 .addReg(X86::ESP, RegState::Implicit)
14173 .addReg(X86::EAX, RegState::Define | RegState::Implicit)
14174 .addReg(X86::ESP, RegState::Define | RegState::Implicit)
14175 .addReg(X86::EFLAGS, RegState::Define | RegState::Implicit);
14178 MI->eraseFromParent(); // The pseudo instruction is gone now.
14182 MachineBasicBlock *
14183 X86TargetLowering::EmitLoweredTLSCall(MachineInstr *MI,
14184 MachineBasicBlock *BB) const {
14185 // This is pretty easy. We're taking the value that we received from
14186 // our load from the relocation, sticking it in either RDI (x86-64)
14187 // or EAX and doing an indirect call. The return value will then
14188 // be in the normal return register.
14189 const X86InstrInfo *TII
14190 = static_cast<const X86InstrInfo*>(getTargetMachine().getInstrInfo());
14191 DebugLoc DL = MI->getDebugLoc();
14192 MachineFunction *F = BB->getParent();
14194 assert(Subtarget->isTargetDarwin() && "Darwin only instr emitted?");
14195 assert(MI->getOperand(3).isGlobal() && "This should be a global");
14197 // Get a register mask for the lowered call.
14198 // FIXME: The 32-bit calls have non-standard calling conventions. Use a
14199 // proper register mask.
14200 const uint32_t *RegMask =
14201 getTargetMachine().getRegisterInfo()->getCallPreservedMask(CallingConv::C);
14202 if (Subtarget->is64Bit()) {
14203 MachineInstrBuilder MIB = BuildMI(*BB, MI, DL,
14204 TII->get(X86::MOV64rm), X86::RDI)
14206 .addImm(0).addReg(0)
14207 .addGlobalAddress(MI->getOperand(3).getGlobal(), 0,
14208 MI->getOperand(3).getTargetFlags())
14210 MIB = BuildMI(*BB, MI, DL, TII->get(X86::CALL64m));
14211 addDirectMem(MIB, X86::RDI);
14212 MIB.addReg(X86::RAX, RegState::ImplicitDefine).addRegMask(RegMask);
14213 } else if (getTargetMachine().getRelocationModel() != Reloc::PIC_) {
14214 MachineInstrBuilder MIB = BuildMI(*BB, MI, DL,
14215 TII->get(X86::MOV32rm), X86::EAX)
14217 .addImm(0).addReg(0)
14218 .addGlobalAddress(MI->getOperand(3).getGlobal(), 0,
14219 MI->getOperand(3).getTargetFlags())
14221 MIB = BuildMI(*BB, MI, DL, TII->get(X86::CALL32m));
14222 addDirectMem(MIB, X86::EAX);
14223 MIB.addReg(X86::EAX, RegState::ImplicitDefine).addRegMask(RegMask);
14225 MachineInstrBuilder MIB = BuildMI(*BB, MI, DL,
14226 TII->get(X86::MOV32rm), X86::EAX)
14227 .addReg(TII->getGlobalBaseReg(F))
14228 .addImm(0).addReg(0)
14229 .addGlobalAddress(MI->getOperand(3).getGlobal(), 0,
14230 MI->getOperand(3).getTargetFlags())
14232 MIB = BuildMI(*BB, MI, DL, TII->get(X86::CALL32m));
14233 addDirectMem(MIB, X86::EAX);
14234 MIB.addReg(X86::EAX, RegState::ImplicitDefine).addRegMask(RegMask);
14237 MI->eraseFromParent(); // The pseudo instruction is gone now.
14241 MachineBasicBlock *
14242 X86TargetLowering::emitEHSjLjSetJmp(MachineInstr *MI,
14243 MachineBasicBlock *MBB) const {
14244 DebugLoc DL = MI->getDebugLoc();
14245 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
14247 MachineFunction *MF = MBB->getParent();
14248 MachineRegisterInfo &MRI = MF->getRegInfo();
14250 const BasicBlock *BB = MBB->getBasicBlock();
14251 MachineFunction::iterator I = MBB;
14254 // Memory Reference
14255 MachineInstr::mmo_iterator MMOBegin = MI->memoperands_begin();
14256 MachineInstr::mmo_iterator MMOEnd = MI->memoperands_end();
14259 unsigned MemOpndSlot = 0;
14261 unsigned CurOp = 0;
14263 DstReg = MI->getOperand(CurOp++).getReg();
14264 const TargetRegisterClass *RC = MRI.getRegClass(DstReg);
14265 assert(RC->hasType(MVT::i32) && "Invalid destination!");
14266 unsigned mainDstReg = MRI.createVirtualRegister(RC);
14267 unsigned restoreDstReg = MRI.createVirtualRegister(RC);
14269 MemOpndSlot = CurOp;
14271 MVT PVT = getPointerTy();
14272 assert((PVT == MVT::i64 || PVT == MVT::i32) &&
14273 "Invalid Pointer Size!");
14275 // For v = setjmp(buf), we generate
14278 // buf[LabelOffset] = restoreMBB
14279 // SjLjSetup restoreMBB
14285 // v = phi(main, restore)
14290 MachineBasicBlock *thisMBB = MBB;
14291 MachineBasicBlock *mainMBB = MF->CreateMachineBasicBlock(BB);
14292 MachineBasicBlock *sinkMBB = MF->CreateMachineBasicBlock(BB);
14293 MachineBasicBlock *restoreMBB = MF->CreateMachineBasicBlock(BB);
14294 MF->insert(I, mainMBB);
14295 MF->insert(I, sinkMBB);
14296 MF->push_back(restoreMBB);
14298 MachineInstrBuilder MIB;
14300 // Transfer the remainder of BB and its successor edges to sinkMBB.
14301 sinkMBB->splice(sinkMBB->begin(), MBB,
14302 llvm::next(MachineBasicBlock::iterator(MI)), MBB->end());
14303 sinkMBB->transferSuccessorsAndUpdatePHIs(MBB);
14306 unsigned PtrStoreOpc = 0;
14307 unsigned LabelReg = 0;
14308 const int64_t LabelOffset = 1 * PVT.getStoreSize();
14309 Reloc::Model RM = getTargetMachine().getRelocationModel();
14310 bool UseImmLabel = (getTargetMachine().getCodeModel() == CodeModel::Small) &&
14311 (RM == Reloc::Static || RM == Reloc::DynamicNoPIC);
14313 // Prepare IP either in reg or imm.
14314 if (!UseImmLabel) {
14315 PtrStoreOpc = (PVT == MVT::i64) ? X86::MOV64mr : X86::MOV32mr;
14316 const TargetRegisterClass *PtrRC = getRegClassFor(PVT);
14317 LabelReg = MRI.createVirtualRegister(PtrRC);
14318 if (Subtarget->is64Bit()) {
14319 MIB = BuildMI(*thisMBB, MI, DL, TII->get(X86::LEA64r), LabelReg)
14323 .addMBB(restoreMBB)
14326 const X86InstrInfo *XII = static_cast<const X86InstrInfo*>(TII);
14327 MIB = BuildMI(*thisMBB, MI, DL, TII->get(X86::LEA32r), LabelReg)
14328 .addReg(XII->getGlobalBaseReg(MF))
14331 .addMBB(restoreMBB, Subtarget->ClassifyBlockAddressReference())
14335 PtrStoreOpc = (PVT == MVT::i64) ? X86::MOV64mi32 : X86::MOV32mi;
14337 MIB = BuildMI(*thisMBB, MI, DL, TII->get(PtrStoreOpc));
14338 for (unsigned i = 0; i < X86::AddrNumOperands; ++i) {
14339 if (i == X86::AddrDisp)
14340 MIB.addDisp(MI->getOperand(MemOpndSlot + i), LabelOffset);
14342 MIB.addOperand(MI->getOperand(MemOpndSlot + i));
14345 MIB.addReg(LabelReg);
14347 MIB.addMBB(restoreMBB);
14348 MIB.setMemRefs(MMOBegin, MMOEnd);
14350 MIB = BuildMI(*thisMBB, MI, DL, TII->get(X86::EH_SjLj_Setup))
14351 .addMBB(restoreMBB);
14352 MIB.addRegMask(RegInfo->getNoPreservedMask());
14353 thisMBB->addSuccessor(mainMBB);
14354 thisMBB->addSuccessor(restoreMBB);
14358 BuildMI(mainMBB, DL, TII->get(X86::MOV32r0), mainDstReg);
14359 mainMBB->addSuccessor(sinkMBB);
14362 BuildMI(*sinkMBB, sinkMBB->begin(), DL,
14363 TII->get(X86::PHI), DstReg)
14364 .addReg(mainDstReg).addMBB(mainMBB)
14365 .addReg(restoreDstReg).addMBB(restoreMBB);
14368 BuildMI(restoreMBB, DL, TII->get(X86::MOV32ri), restoreDstReg).addImm(1);
14369 BuildMI(restoreMBB, DL, TII->get(X86::JMP_4)).addMBB(sinkMBB);
14370 restoreMBB->addSuccessor(sinkMBB);
14372 MI->eraseFromParent();
14376 MachineBasicBlock *
14377 X86TargetLowering::emitEHSjLjLongJmp(MachineInstr *MI,
14378 MachineBasicBlock *MBB) const {
14379 DebugLoc DL = MI->getDebugLoc();
14380 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
14382 MachineFunction *MF = MBB->getParent();
14383 MachineRegisterInfo &MRI = MF->getRegInfo();
14385 // Memory Reference
14386 MachineInstr::mmo_iterator MMOBegin = MI->memoperands_begin();
14387 MachineInstr::mmo_iterator MMOEnd = MI->memoperands_end();
14389 MVT PVT = getPointerTy();
14390 assert((PVT == MVT::i64 || PVT == MVT::i32) &&
14391 "Invalid Pointer Size!");
14393 const TargetRegisterClass *RC =
14394 (PVT == MVT::i64) ? &X86::GR64RegClass : &X86::GR32RegClass;
14395 unsigned Tmp = MRI.createVirtualRegister(RC);
14396 // Since FP is only updated here but NOT referenced, it's treated as GPR.
14397 unsigned FP = (PVT == MVT::i64) ? X86::RBP : X86::EBP;
14398 unsigned SP = RegInfo->getStackRegister();
14400 MachineInstrBuilder MIB;
14402 const int64_t LabelOffset = 1 * PVT.getStoreSize();
14403 const int64_t SPOffset = 2 * PVT.getStoreSize();
14405 unsigned PtrLoadOpc = (PVT == MVT::i64) ? X86::MOV64rm : X86::MOV32rm;
14406 unsigned IJmpOpc = (PVT == MVT::i64) ? X86::JMP64r : X86::JMP32r;
14409 MIB = BuildMI(*MBB, MI, DL, TII->get(PtrLoadOpc), FP);
14410 for (unsigned i = 0; i < X86::AddrNumOperands; ++i)
14411 MIB.addOperand(MI->getOperand(i));
14412 MIB.setMemRefs(MMOBegin, MMOEnd);
14414 MIB = BuildMI(*MBB, MI, DL, TII->get(PtrLoadOpc), Tmp);
14415 for (unsigned i = 0; i < X86::AddrNumOperands; ++i) {
14416 if (i == X86::AddrDisp)
14417 MIB.addDisp(MI->getOperand(i), LabelOffset);
14419 MIB.addOperand(MI->getOperand(i));
14421 MIB.setMemRefs(MMOBegin, MMOEnd);
14423 MIB = BuildMI(*MBB, MI, DL, TII->get(PtrLoadOpc), SP);
14424 for (unsigned i = 0; i < X86::AddrNumOperands; ++i) {
14425 if (i == X86::AddrDisp)
14426 MIB.addDisp(MI->getOperand(i), SPOffset);
14428 MIB.addOperand(MI->getOperand(i));
14430 MIB.setMemRefs(MMOBegin, MMOEnd);
14432 BuildMI(*MBB, MI, DL, TII->get(IJmpOpc)).addReg(Tmp);
14434 MI->eraseFromParent();
14438 MachineBasicBlock *
14439 X86TargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
14440 MachineBasicBlock *BB) const {
14441 switch (MI->getOpcode()) {
14442 default: llvm_unreachable("Unexpected instr type to insert");
14443 case X86::TAILJMPd64:
14444 case X86::TAILJMPr64:
14445 case X86::TAILJMPm64:
14446 llvm_unreachable("TAILJMP64 would not be touched here.");
14447 case X86::TCRETURNdi64:
14448 case X86::TCRETURNri64:
14449 case X86::TCRETURNmi64:
14451 case X86::WIN_ALLOCA:
14452 return EmitLoweredWinAlloca(MI, BB);
14453 case X86::SEG_ALLOCA_32:
14454 return EmitLoweredSegAlloca(MI, BB, false);
14455 case X86::SEG_ALLOCA_64:
14456 return EmitLoweredSegAlloca(MI, BB, true);
14457 case X86::TLSCall_32:
14458 case X86::TLSCall_64:
14459 return EmitLoweredTLSCall(MI, BB);
14460 case X86::CMOV_GR8:
14461 case X86::CMOV_FR32:
14462 case X86::CMOV_FR64:
14463 case X86::CMOV_V4F32:
14464 case X86::CMOV_V2F64:
14465 case X86::CMOV_V2I64:
14466 case X86::CMOV_V8F32:
14467 case X86::CMOV_V4F64:
14468 case X86::CMOV_V4I64:
14469 case X86::CMOV_GR16:
14470 case X86::CMOV_GR32:
14471 case X86::CMOV_RFP32:
14472 case X86::CMOV_RFP64:
14473 case X86::CMOV_RFP80:
14474 return EmitLoweredSelect(MI, BB);
14476 case X86::FP32_TO_INT16_IN_MEM:
14477 case X86::FP32_TO_INT32_IN_MEM:
14478 case X86::FP32_TO_INT64_IN_MEM:
14479 case X86::FP64_TO_INT16_IN_MEM:
14480 case X86::FP64_TO_INT32_IN_MEM:
14481 case X86::FP64_TO_INT64_IN_MEM:
14482 case X86::FP80_TO_INT16_IN_MEM:
14483 case X86::FP80_TO_INT32_IN_MEM:
14484 case X86::FP80_TO_INT64_IN_MEM: {
14485 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
14486 DebugLoc DL = MI->getDebugLoc();
14488 // Change the floating point control register to use "round towards zero"
14489 // mode when truncating to an integer value.
14490 MachineFunction *F = BB->getParent();
14491 int CWFrameIdx = F->getFrameInfo()->CreateStackObject(2, 2, false);
14492 addFrameReference(BuildMI(*BB, MI, DL,
14493 TII->get(X86::FNSTCW16m)), CWFrameIdx);
14495 // Load the old value of the high byte of the control word...
14497 F->getRegInfo().createVirtualRegister(&X86::GR16RegClass);
14498 addFrameReference(BuildMI(*BB, MI, DL, TII->get(X86::MOV16rm), OldCW),
14501 // Set the high part to be round to zero...
14502 addFrameReference(BuildMI(*BB, MI, DL, TII->get(X86::MOV16mi)), CWFrameIdx)
14505 // Reload the modified control word now...
14506 addFrameReference(BuildMI(*BB, MI, DL,
14507 TII->get(X86::FLDCW16m)), CWFrameIdx);
14509 // Restore the memory image of control word to original value
14510 addFrameReference(BuildMI(*BB, MI, DL, TII->get(X86::MOV16mr)), CWFrameIdx)
14513 // Get the X86 opcode to use.
14515 switch (MI->getOpcode()) {
14516 default: llvm_unreachable("illegal opcode!");
14517 case X86::FP32_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m32; break;
14518 case X86::FP32_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m32; break;
14519 case X86::FP32_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m32; break;
14520 case X86::FP64_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m64; break;
14521 case X86::FP64_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m64; break;
14522 case X86::FP64_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m64; break;
14523 case X86::FP80_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m80; break;
14524 case X86::FP80_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m80; break;
14525 case X86::FP80_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m80; break;
14529 MachineOperand &Op = MI->getOperand(0);
14531 AM.BaseType = X86AddressMode::RegBase;
14532 AM.Base.Reg = Op.getReg();
14534 AM.BaseType = X86AddressMode::FrameIndexBase;
14535 AM.Base.FrameIndex = Op.getIndex();
14537 Op = MI->getOperand(1);
14539 AM.Scale = Op.getImm();
14540 Op = MI->getOperand(2);
14542 AM.IndexReg = Op.getImm();
14543 Op = MI->getOperand(3);
14544 if (Op.isGlobal()) {
14545 AM.GV = Op.getGlobal();
14547 AM.Disp = Op.getImm();
14549 addFullAddress(BuildMI(*BB, MI, DL, TII->get(Opc)), AM)
14550 .addReg(MI->getOperand(X86::AddrNumOperands).getReg());
14552 // Reload the original control word now.
14553 addFrameReference(BuildMI(*BB, MI, DL,
14554 TII->get(X86::FLDCW16m)), CWFrameIdx);
14556 MI->eraseFromParent(); // The pseudo instruction is gone now.
14559 // String/text processing lowering.
14560 case X86::PCMPISTRM128REG:
14561 case X86::VPCMPISTRM128REG:
14562 case X86::PCMPISTRM128MEM:
14563 case X86::VPCMPISTRM128MEM:
14564 case X86::PCMPESTRM128REG:
14565 case X86::VPCMPESTRM128REG:
14566 case X86::PCMPESTRM128MEM:
14567 case X86::VPCMPESTRM128MEM:
14568 assert(Subtarget->hasSSE42() &&
14569 "Target must have SSE4.2 or AVX features enabled");
14570 return EmitPCMPSTRM(MI, BB, getTargetMachine().getInstrInfo());
14572 // String/text processing lowering.
14573 case X86::PCMPISTRIREG:
14574 case X86::VPCMPISTRIREG:
14575 case X86::PCMPISTRIMEM:
14576 case X86::VPCMPISTRIMEM:
14577 case X86::PCMPESTRIREG:
14578 case X86::VPCMPESTRIREG:
14579 case X86::PCMPESTRIMEM:
14580 case X86::VPCMPESTRIMEM:
14581 assert(Subtarget->hasSSE42() &&
14582 "Target must have SSE4.2 or AVX features enabled");
14583 return EmitPCMPSTRI(MI, BB, getTargetMachine().getInstrInfo());
14585 // Thread synchronization.
14587 return EmitMonitor(MI, BB, getTargetMachine().getInstrInfo(), Subtarget);
14591 return EmitXBegin(MI, BB, getTargetMachine().getInstrInfo());
14593 // Atomic Lowering.
14594 case X86::ATOMAND8:
14595 case X86::ATOMAND16:
14596 case X86::ATOMAND32:
14597 case X86::ATOMAND64:
14600 case X86::ATOMOR16:
14601 case X86::ATOMOR32:
14602 case X86::ATOMOR64:
14604 case X86::ATOMXOR16:
14605 case X86::ATOMXOR8:
14606 case X86::ATOMXOR32:
14607 case X86::ATOMXOR64:
14609 case X86::ATOMNAND8:
14610 case X86::ATOMNAND16:
14611 case X86::ATOMNAND32:
14612 case X86::ATOMNAND64:
14614 case X86::ATOMMAX8:
14615 case X86::ATOMMAX16:
14616 case X86::ATOMMAX32:
14617 case X86::ATOMMAX64:
14619 case X86::ATOMMIN8:
14620 case X86::ATOMMIN16:
14621 case X86::ATOMMIN32:
14622 case X86::ATOMMIN64:
14624 case X86::ATOMUMAX8:
14625 case X86::ATOMUMAX16:
14626 case X86::ATOMUMAX32:
14627 case X86::ATOMUMAX64:
14629 case X86::ATOMUMIN8:
14630 case X86::ATOMUMIN16:
14631 case X86::ATOMUMIN32:
14632 case X86::ATOMUMIN64:
14633 return EmitAtomicLoadArith(MI, BB);
14635 // This group does 64-bit operations on a 32-bit host.
14636 case X86::ATOMAND6432:
14637 case X86::ATOMOR6432:
14638 case X86::ATOMXOR6432:
14639 case X86::ATOMNAND6432:
14640 case X86::ATOMADD6432:
14641 case X86::ATOMSUB6432:
14642 case X86::ATOMMAX6432:
14643 case X86::ATOMMIN6432:
14644 case X86::ATOMUMAX6432:
14645 case X86::ATOMUMIN6432:
14646 case X86::ATOMSWAP6432:
14647 return EmitAtomicLoadArith6432(MI, BB);
14649 case X86::VASTART_SAVE_XMM_REGS:
14650 return EmitVAStartSaveXMMRegsWithCustomInserter(MI, BB);
14652 case X86::VAARG_64:
14653 return EmitVAARG64WithCustomInserter(MI, BB);
14655 case X86::EH_SjLj_SetJmp32:
14656 case X86::EH_SjLj_SetJmp64:
14657 return emitEHSjLjSetJmp(MI, BB);
14659 case X86::EH_SjLj_LongJmp32:
14660 case X86::EH_SjLj_LongJmp64:
14661 return emitEHSjLjLongJmp(MI, BB);
14665 //===----------------------------------------------------------------------===//
14666 // X86 Optimization Hooks
14667 //===----------------------------------------------------------------------===//
14669 void X86TargetLowering::computeMaskedBitsForTargetNode(const SDValue Op,
14672 const SelectionDAG &DAG,
14673 unsigned Depth) const {
14674 unsigned BitWidth = KnownZero.getBitWidth();
14675 unsigned Opc = Op.getOpcode();
14676 assert((Opc >= ISD::BUILTIN_OP_END ||
14677 Opc == ISD::INTRINSIC_WO_CHAIN ||
14678 Opc == ISD::INTRINSIC_W_CHAIN ||
14679 Opc == ISD::INTRINSIC_VOID) &&
14680 "Should use MaskedValueIsZero if you don't know whether Op"
14681 " is a target node!");
14683 KnownZero = KnownOne = APInt(BitWidth, 0); // Don't know anything.
14697 // These nodes' second result is a boolean.
14698 if (Op.getResNo() == 0)
14701 case X86ISD::SETCC:
14702 KnownZero |= APInt::getHighBitsSet(BitWidth, BitWidth - 1);
14704 case ISD::INTRINSIC_WO_CHAIN: {
14705 unsigned IntId = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
14706 unsigned NumLoBits = 0;
14709 case Intrinsic::x86_sse_movmsk_ps:
14710 case Intrinsic::x86_avx_movmsk_ps_256:
14711 case Intrinsic::x86_sse2_movmsk_pd:
14712 case Intrinsic::x86_avx_movmsk_pd_256:
14713 case Intrinsic::x86_mmx_pmovmskb:
14714 case Intrinsic::x86_sse2_pmovmskb_128:
14715 case Intrinsic::x86_avx2_pmovmskb: {
14716 // High bits of movmskp{s|d}, pmovmskb are known zero.
14718 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
14719 case Intrinsic::x86_sse_movmsk_ps: NumLoBits = 4; break;
14720 case Intrinsic::x86_avx_movmsk_ps_256: NumLoBits = 8; break;
14721 case Intrinsic::x86_sse2_movmsk_pd: NumLoBits = 2; break;
14722 case Intrinsic::x86_avx_movmsk_pd_256: NumLoBits = 4; break;
14723 case Intrinsic::x86_mmx_pmovmskb: NumLoBits = 8; break;
14724 case Intrinsic::x86_sse2_pmovmskb_128: NumLoBits = 16; break;
14725 case Intrinsic::x86_avx2_pmovmskb: NumLoBits = 32; break;
14727 KnownZero = APInt::getHighBitsSet(BitWidth, BitWidth - NumLoBits);
14736 unsigned X86TargetLowering::ComputeNumSignBitsForTargetNode(SDValue Op,
14737 unsigned Depth) const {
14738 // SETCC_CARRY sets the dest to ~0 for true or 0 for false.
14739 if (Op.getOpcode() == X86ISD::SETCC_CARRY)
14740 return Op.getValueType().getScalarType().getSizeInBits();
14746 /// isGAPlusOffset - Returns true (and the GlobalValue and the offset) if the
14747 /// node is a GlobalAddress + offset.
14748 bool X86TargetLowering::isGAPlusOffset(SDNode *N,
14749 const GlobalValue* &GA,
14750 int64_t &Offset) const {
14751 if (N->getOpcode() == X86ISD::Wrapper) {
14752 if (isa<GlobalAddressSDNode>(N->getOperand(0))) {
14753 GA = cast<GlobalAddressSDNode>(N->getOperand(0))->getGlobal();
14754 Offset = cast<GlobalAddressSDNode>(N->getOperand(0))->getOffset();
14758 return TargetLowering::isGAPlusOffset(N, GA, Offset);
14761 /// isShuffleHigh128VectorInsertLow - Checks whether the shuffle node is the
14762 /// same as extracting the high 128-bit part of 256-bit vector and then
14763 /// inserting the result into the low part of a new 256-bit vector
14764 static bool isShuffleHigh128VectorInsertLow(ShuffleVectorSDNode *SVOp) {
14765 EVT VT = SVOp->getValueType(0);
14766 unsigned NumElems = VT.getVectorNumElements();
14768 // vector_shuffle <4, 5, 6, 7, u, u, u, u> or <2, 3, u, u>
14769 for (unsigned i = 0, j = NumElems/2; i != NumElems/2; ++i, ++j)
14770 if (!isUndefOrEqual(SVOp->getMaskElt(i), j) ||
14771 SVOp->getMaskElt(j) >= 0)
14777 /// isShuffleLow128VectorInsertHigh - Checks whether the shuffle node is the
14778 /// same as extracting the low 128-bit part of 256-bit vector and then
14779 /// inserting the result into the high part of a new 256-bit vector
14780 static bool isShuffleLow128VectorInsertHigh(ShuffleVectorSDNode *SVOp) {
14781 EVT VT = SVOp->getValueType(0);
14782 unsigned NumElems = VT.getVectorNumElements();
14784 // vector_shuffle <u, u, u, u, 0, 1, 2, 3> or <u, u, 0, 1>
14785 for (unsigned i = NumElems/2, j = 0; i != NumElems; ++i, ++j)
14786 if (!isUndefOrEqual(SVOp->getMaskElt(i), j) ||
14787 SVOp->getMaskElt(j) >= 0)
14793 /// PerformShuffleCombine256 - Performs shuffle combines for 256-bit vectors.
14794 static SDValue PerformShuffleCombine256(SDNode *N, SelectionDAG &DAG,
14795 TargetLowering::DAGCombinerInfo &DCI,
14796 const X86Subtarget* Subtarget) {
14797 DebugLoc dl = N->getDebugLoc();
14798 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);
14799 SDValue V1 = SVOp->getOperand(0);
14800 SDValue V2 = SVOp->getOperand(1);
14801 EVT VT = SVOp->getValueType(0);
14802 unsigned NumElems = VT.getVectorNumElements();
14804 if (V1.getOpcode() == ISD::CONCAT_VECTORS &&
14805 V2.getOpcode() == ISD::CONCAT_VECTORS) {
14809 // V UNDEF BUILD_VECTOR UNDEF
14811 // CONCAT_VECTOR CONCAT_VECTOR
14814 // RESULT: V + zero extended
14816 if (V2.getOperand(0).getOpcode() != ISD::BUILD_VECTOR ||
14817 V2.getOperand(1).getOpcode() != ISD::UNDEF ||
14818 V1.getOperand(1).getOpcode() != ISD::UNDEF)
14821 if (!ISD::isBuildVectorAllZeros(V2.getOperand(0).getNode()))
14824 // To match the shuffle mask, the first half of the mask should
14825 // be exactly the first vector, and all the rest a splat with the
14826 // first element of the second one.
14827 for (unsigned i = 0; i != NumElems/2; ++i)
14828 if (!isUndefOrEqual(SVOp->getMaskElt(i), i) ||
14829 !isUndefOrEqual(SVOp->getMaskElt(i+NumElems/2), NumElems))
14832 // If V1 is coming from a vector load then just fold to a VZEXT_LOAD.
14833 if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(V1.getOperand(0))) {
14834 if (Ld->hasNUsesOfValue(1, 0)) {
14835 SDVTList Tys = DAG.getVTList(MVT::v4i64, MVT::Other);
14836 SDValue Ops[] = { Ld->getChain(), Ld->getBasePtr() };
14838 DAG.getMemIntrinsicNode(X86ISD::VZEXT_LOAD, dl, Tys, Ops, 2,
14840 Ld->getPointerInfo(),
14841 Ld->getAlignment(),
14842 false/*isVolatile*/, true/*ReadMem*/,
14843 false/*WriteMem*/);
14845 // Make sure the newly-created LOAD is in the same position as Ld in
14846 // terms of dependency. We create a TokenFactor for Ld and ResNode,
14847 // and update uses of Ld's output chain to use the TokenFactor.
14848 if (Ld->hasAnyUseOfValue(1)) {
14849 SDValue NewChain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
14850 SDValue(Ld, 1), SDValue(ResNode.getNode(), 1));
14851 DAG.ReplaceAllUsesOfValueWith(SDValue(Ld, 1), NewChain);
14852 DAG.UpdateNodeOperands(NewChain.getNode(), SDValue(Ld, 1),
14853 SDValue(ResNode.getNode(), 1));
14856 return DAG.getNode(ISD::BITCAST, dl, VT, ResNode);
14860 // Emit a zeroed vector and insert the desired subvector on its
14862 SDValue Zeros = getZeroVector(VT, Subtarget, DAG, dl);
14863 SDValue InsV = Insert128BitVector(Zeros, V1.getOperand(0), 0, DAG, dl);
14864 return DCI.CombineTo(N, InsV);
14867 //===--------------------------------------------------------------------===//
14868 // Combine some shuffles into subvector extracts and inserts:
14871 // vector_shuffle <4, 5, 6, 7, u, u, u, u> or <2, 3, u, u>
14872 if (isShuffleHigh128VectorInsertLow(SVOp)) {
14873 SDValue V = Extract128BitVector(V1, NumElems/2, DAG, dl);
14874 SDValue InsV = Insert128BitVector(DAG.getUNDEF(VT), V, 0, DAG, dl);
14875 return DCI.CombineTo(N, InsV);
14878 // vector_shuffle <u, u, u, u, 0, 1, 2, 3> or <u, u, 0, 1>
14879 if (isShuffleLow128VectorInsertHigh(SVOp)) {
14880 SDValue V = Extract128BitVector(V1, 0, DAG, dl);
14881 SDValue InsV = Insert128BitVector(DAG.getUNDEF(VT), V, NumElems/2, DAG, dl);
14882 return DCI.CombineTo(N, InsV);
14888 /// PerformShuffleCombine - Performs several different shuffle combines.
14889 static SDValue PerformShuffleCombine(SDNode *N, SelectionDAG &DAG,
14890 TargetLowering::DAGCombinerInfo &DCI,
14891 const X86Subtarget *Subtarget) {
14892 DebugLoc dl = N->getDebugLoc();
14893 EVT VT = N->getValueType(0);
14895 // Don't create instructions with illegal types after legalize types has run.
14896 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
14897 if (!DCI.isBeforeLegalize() && !TLI.isTypeLegal(VT.getVectorElementType()))
14900 // Combine 256-bit vector shuffles. This is only profitable when in AVX mode
14901 if (Subtarget->hasFp256() && VT.is256BitVector() &&
14902 N->getOpcode() == ISD::VECTOR_SHUFFLE)
14903 return PerformShuffleCombine256(N, DAG, DCI, Subtarget);
14905 // Only handle 128 wide vector from here on.
14906 if (!VT.is128BitVector())
14909 // Combine a vector_shuffle that is equal to build_vector load1, load2, load3,
14910 // load4, <0, 1, 2, 3> into a 128-bit load if the load addresses are
14911 // consecutive, non-overlapping, and in the right order.
14912 SmallVector<SDValue, 16> Elts;
14913 for (unsigned i = 0, e = VT.getVectorNumElements(); i != e; ++i)
14914 Elts.push_back(getShuffleScalarElt(N, i, DAG, 0));
14916 return EltsFromConsecutiveLoads(VT, Elts, dl, DAG);
14919 /// PerformTruncateCombine - Converts truncate operation to
14920 /// a sequence of vector shuffle operations.
14921 /// It is possible when we truncate 256-bit vector to 128-bit vector
14922 static SDValue PerformTruncateCombine(SDNode *N, SelectionDAG &DAG,
14923 TargetLowering::DAGCombinerInfo &DCI,
14924 const X86Subtarget *Subtarget) {
14928 /// XFormVExtractWithShuffleIntoLoad - Check if a vector extract from a target
14929 /// specific shuffle of a load can be folded into a single element load.
14930 /// Similar handling for VECTOR_SHUFFLE is performed by DAGCombiner, but
14931 /// shuffles have been customed lowered so we need to handle those here.
14932 static SDValue XFormVExtractWithShuffleIntoLoad(SDNode *N, SelectionDAG &DAG,
14933 TargetLowering::DAGCombinerInfo &DCI) {
14934 if (DCI.isBeforeLegalizeOps())
14937 SDValue InVec = N->getOperand(0);
14938 SDValue EltNo = N->getOperand(1);
14940 if (!isa<ConstantSDNode>(EltNo))
14943 EVT VT = InVec.getValueType();
14945 bool HasShuffleIntoBitcast = false;
14946 if (InVec.getOpcode() == ISD::BITCAST) {
14947 // Don't duplicate a load with other uses.
14948 if (!InVec.hasOneUse())
14950 EVT BCVT = InVec.getOperand(0).getValueType();
14951 if (BCVT.getVectorNumElements() != VT.getVectorNumElements())
14953 InVec = InVec.getOperand(0);
14954 HasShuffleIntoBitcast = true;
14957 if (!isTargetShuffle(InVec.getOpcode()))
14960 // Don't duplicate a load with other uses.
14961 if (!InVec.hasOneUse())
14964 SmallVector<int, 16> ShuffleMask;
14966 if (!getTargetShuffleMask(InVec.getNode(), VT.getSimpleVT(), ShuffleMask,
14970 // Select the input vector, guarding against out of range extract vector.
14971 unsigned NumElems = VT.getVectorNumElements();
14972 int Elt = cast<ConstantSDNode>(EltNo)->getZExtValue();
14973 int Idx = (Elt > (int)NumElems) ? -1 : ShuffleMask[Elt];
14974 SDValue LdNode = (Idx < (int)NumElems) ? InVec.getOperand(0)
14975 : InVec.getOperand(1);
14977 // If inputs to shuffle are the same for both ops, then allow 2 uses
14978 unsigned AllowedUses = InVec.getOperand(0) == InVec.getOperand(1) ? 2 : 1;
14980 if (LdNode.getOpcode() == ISD::BITCAST) {
14981 // Don't duplicate a load with other uses.
14982 if (!LdNode.getNode()->hasNUsesOfValue(AllowedUses, 0))
14985 AllowedUses = 1; // only allow 1 load use if we have a bitcast
14986 LdNode = LdNode.getOperand(0);
14989 if (!ISD::isNormalLoad(LdNode.getNode()))
14992 LoadSDNode *LN0 = cast<LoadSDNode>(LdNode);
14994 if (!LN0 ||!LN0->hasNUsesOfValue(AllowedUses, 0) || LN0->isVolatile())
14997 if (HasShuffleIntoBitcast) {
14998 // If there's a bitcast before the shuffle, check if the load type and
14999 // alignment is valid.
15000 unsigned Align = LN0->getAlignment();
15001 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
15002 unsigned NewAlign = TLI.getDataLayout()->
15003 getABITypeAlignment(VT.getTypeForEVT(*DAG.getContext()));
15005 if (NewAlign > Align || !TLI.isOperationLegalOrCustom(ISD::LOAD, VT))
15009 // All checks match so transform back to vector_shuffle so that DAG combiner
15010 // can finish the job
15011 DebugLoc dl = N->getDebugLoc();
15013 // Create shuffle node taking into account the case that its a unary shuffle
15014 SDValue Shuffle = (UnaryShuffle) ? DAG.getUNDEF(VT) : InVec.getOperand(1);
15015 Shuffle = DAG.getVectorShuffle(InVec.getValueType(), dl,
15016 InVec.getOperand(0), Shuffle,
15018 Shuffle = DAG.getNode(ISD::BITCAST, dl, VT, Shuffle);
15019 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, N->getValueType(0), Shuffle,
15023 /// PerformEXTRACT_VECTOR_ELTCombine - Detect vector gather/scatter index
15024 /// generation and convert it from being a bunch of shuffles and extracts
15025 /// to a simple store and scalar loads to extract the elements.
15026 static SDValue PerformEXTRACT_VECTOR_ELTCombine(SDNode *N, SelectionDAG &DAG,
15027 TargetLowering::DAGCombinerInfo &DCI) {
15028 SDValue NewOp = XFormVExtractWithShuffleIntoLoad(N, DAG, DCI);
15029 if (NewOp.getNode())
15032 SDValue InputVector = N->getOperand(0);
15033 // Detect whether we are trying to convert from mmx to i32 and the bitcast
15034 // from mmx to v2i32 has a single usage.
15035 if (InputVector.getNode()->getOpcode() == llvm::ISD::BITCAST &&
15036 InputVector.getNode()->getOperand(0).getValueType() == MVT::x86mmx &&
15037 InputVector.hasOneUse() && N->getValueType(0) == MVT::i32)
15038 return DAG.getNode(X86ISD::MMX_MOVD2W, InputVector.getDebugLoc(),
15039 N->getValueType(0),
15040 InputVector.getNode()->getOperand(0));
15042 // Only operate on vectors of 4 elements, where the alternative shuffling
15043 // gets to be more expensive.
15044 if (InputVector.getValueType() != MVT::v4i32)
15047 // Check whether every use of InputVector is an EXTRACT_VECTOR_ELT with a
15048 // single use which is a sign-extend or zero-extend, and all elements are
15050 SmallVector<SDNode *, 4> Uses;
15051 unsigned ExtractedElements = 0;
15052 for (SDNode::use_iterator UI = InputVector.getNode()->use_begin(),
15053 UE = InputVector.getNode()->use_end(); UI != UE; ++UI) {
15054 if (UI.getUse().getResNo() != InputVector.getResNo())
15057 SDNode *Extract = *UI;
15058 if (Extract->getOpcode() != ISD::EXTRACT_VECTOR_ELT)
15061 if (Extract->getValueType(0) != MVT::i32)
15063 if (!Extract->hasOneUse())
15065 if (Extract->use_begin()->getOpcode() != ISD::SIGN_EXTEND &&
15066 Extract->use_begin()->getOpcode() != ISD::ZERO_EXTEND)
15068 if (!isa<ConstantSDNode>(Extract->getOperand(1)))
15071 // Record which element was extracted.
15072 ExtractedElements |=
15073 1 << cast<ConstantSDNode>(Extract->getOperand(1))->getZExtValue();
15075 Uses.push_back(Extract);
15078 // If not all the elements were used, this may not be worthwhile.
15079 if (ExtractedElements != 15)
15082 // Ok, we've now decided to do the transformation.
15083 DebugLoc dl = InputVector.getDebugLoc();
15085 // Store the value to a temporary stack slot.
15086 SDValue StackPtr = DAG.CreateStackTemporary(InputVector.getValueType());
15087 SDValue Ch = DAG.getStore(DAG.getEntryNode(), dl, InputVector, StackPtr,
15088 MachinePointerInfo(), false, false, 0);
15090 // Replace each use (extract) with a load of the appropriate element.
15091 for (SmallVectorImpl<SDNode *>::iterator UI = Uses.begin(),
15092 UE = Uses.end(); UI != UE; ++UI) {
15093 SDNode *Extract = *UI;
15095 // cOMpute the element's address.
15096 SDValue Idx = Extract->getOperand(1);
15098 InputVector.getValueType().getVectorElementType().getSizeInBits()/8;
15099 uint64_t Offset = EltSize * cast<ConstantSDNode>(Idx)->getZExtValue();
15100 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
15101 SDValue OffsetVal = DAG.getConstant(Offset, TLI.getPointerTy());
15103 SDValue ScalarAddr = DAG.getNode(ISD::ADD, dl, TLI.getPointerTy(),
15104 StackPtr, OffsetVal);
15106 // Load the scalar.
15107 SDValue LoadScalar = DAG.getLoad(Extract->getValueType(0), dl, Ch,
15108 ScalarAddr, MachinePointerInfo(),
15109 false, false, false, 0);
15111 // Replace the exact with the load.
15112 DAG.ReplaceAllUsesOfValueWith(SDValue(Extract, 0), LoadScalar);
15115 // The replacement was made in place; don't return anything.
15119 /// \brief Matches a VSELECT onto min/max or return 0 if the node doesn't match.
15120 static unsigned matchIntegerMINMAX(SDValue Cond, EVT VT, SDValue LHS,
15121 SDValue RHS, SelectionDAG &DAG,
15122 const X86Subtarget *Subtarget) {
15123 if (!VT.isVector())
15126 switch (VT.getSimpleVT().SimpleTy) {
15131 if (!Subtarget->hasAVX2())
15136 if (!Subtarget->hasSSE2())
15140 // SSE2 has only a small subset of the operations.
15141 bool hasUnsigned = Subtarget->hasSSE41() ||
15142 (Subtarget->hasSSE2() && VT == MVT::v16i8);
15143 bool hasSigned = Subtarget->hasSSE41() ||
15144 (Subtarget->hasSSE2() && VT == MVT::v8i16);
15146 ISD::CondCode CC = cast<CondCodeSDNode>(Cond.getOperand(2))->get();
15148 // Check for x CC y ? x : y.
15149 if (DAG.isEqualTo(LHS, Cond.getOperand(0)) &&
15150 DAG.isEqualTo(RHS, Cond.getOperand(1))) {
15155 return hasUnsigned ? X86ISD::UMIN : 0;
15158 return hasUnsigned ? X86ISD::UMAX : 0;
15161 return hasSigned ? X86ISD::SMIN : 0;
15164 return hasSigned ? X86ISD::SMAX : 0;
15166 // Check for x CC y ? y : x -- a min/max with reversed arms.
15167 } else if (DAG.isEqualTo(LHS, Cond.getOperand(1)) &&
15168 DAG.isEqualTo(RHS, Cond.getOperand(0))) {
15173 return hasUnsigned ? X86ISD::UMAX : 0;
15176 return hasUnsigned ? X86ISD::UMIN : 0;
15179 return hasSigned ? X86ISD::SMAX : 0;
15182 return hasSigned ? X86ISD::SMIN : 0;
15189 /// PerformSELECTCombine - Do target-specific dag combines on SELECT and VSELECT
15191 static SDValue PerformSELECTCombine(SDNode *N, SelectionDAG &DAG,
15192 TargetLowering::DAGCombinerInfo &DCI,
15193 const X86Subtarget *Subtarget) {
15194 DebugLoc DL = N->getDebugLoc();
15195 SDValue Cond = N->getOperand(0);
15196 // Get the LHS/RHS of the select.
15197 SDValue LHS = N->getOperand(1);
15198 SDValue RHS = N->getOperand(2);
15199 EVT VT = LHS.getValueType();
15201 // If we have SSE[12] support, try to form min/max nodes. SSE min/max
15202 // instructions match the semantics of the common C idiom x<y?x:y but not
15203 // x<=y?x:y, because of how they handle negative zero (which can be
15204 // ignored in unsafe-math mode).
15205 if (Cond.getOpcode() == ISD::SETCC && VT.isFloatingPoint() &&
15206 VT != MVT::f80 && DAG.getTargetLoweringInfo().isTypeLegal(VT) &&
15207 (Subtarget->hasSSE2() ||
15208 (Subtarget->hasSSE1() && VT.getScalarType() == MVT::f32))) {
15209 ISD::CondCode CC = cast<CondCodeSDNode>(Cond.getOperand(2))->get();
15211 unsigned Opcode = 0;
15212 // Check for x CC y ? x : y.
15213 if (DAG.isEqualTo(LHS, Cond.getOperand(0)) &&
15214 DAG.isEqualTo(RHS, Cond.getOperand(1))) {
15218 // Converting this to a min would handle NaNs incorrectly, and swapping
15219 // the operands would cause it to handle comparisons between positive
15220 // and negative zero incorrectly.
15221 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS)) {
15222 if (!DAG.getTarget().Options.UnsafeFPMath &&
15223 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS)))
15225 std::swap(LHS, RHS);
15227 Opcode = X86ISD::FMIN;
15230 // Converting this to a min would handle comparisons between positive
15231 // and negative zero incorrectly.
15232 if (!DAG.getTarget().Options.UnsafeFPMath &&
15233 !DAG.isKnownNeverZero(LHS) && !DAG.isKnownNeverZero(RHS))
15235 Opcode = X86ISD::FMIN;
15238 // Converting this to a min would handle both negative zeros and NaNs
15239 // incorrectly, but we can swap the operands to fix both.
15240 std::swap(LHS, RHS);
15244 Opcode = X86ISD::FMIN;
15248 // Converting this to a max would handle comparisons between positive
15249 // and negative zero incorrectly.
15250 if (!DAG.getTarget().Options.UnsafeFPMath &&
15251 !DAG.isKnownNeverZero(LHS) && !DAG.isKnownNeverZero(RHS))
15253 Opcode = X86ISD::FMAX;
15256 // Converting this to a max would handle NaNs incorrectly, and swapping
15257 // the operands would cause it to handle comparisons between positive
15258 // and negative zero incorrectly.
15259 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS)) {
15260 if (!DAG.getTarget().Options.UnsafeFPMath &&
15261 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS)))
15263 std::swap(LHS, RHS);
15265 Opcode = X86ISD::FMAX;
15268 // Converting this to a max would handle both negative zeros and NaNs
15269 // incorrectly, but we can swap the operands to fix both.
15270 std::swap(LHS, RHS);
15274 Opcode = X86ISD::FMAX;
15277 // Check for x CC y ? y : x -- a min/max with reversed arms.
15278 } else if (DAG.isEqualTo(LHS, Cond.getOperand(1)) &&
15279 DAG.isEqualTo(RHS, Cond.getOperand(0))) {
15283 // Converting this to a min would handle comparisons between positive
15284 // and negative zero incorrectly, and swapping the operands would
15285 // cause it to handle NaNs incorrectly.
15286 if (!DAG.getTarget().Options.UnsafeFPMath &&
15287 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS))) {
15288 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS))
15290 std::swap(LHS, RHS);
15292 Opcode = X86ISD::FMIN;
15295 // Converting this to a min would handle NaNs incorrectly.
15296 if (!DAG.getTarget().Options.UnsafeFPMath &&
15297 (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS)))
15299 Opcode = X86ISD::FMIN;
15302 // Converting this to a min would handle both negative zeros and NaNs
15303 // incorrectly, but we can swap the operands to fix both.
15304 std::swap(LHS, RHS);
15308 Opcode = X86ISD::FMIN;
15312 // Converting this to a max would handle NaNs incorrectly.
15313 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS))
15315 Opcode = X86ISD::FMAX;
15318 // Converting this to a max would handle comparisons between positive
15319 // and negative zero incorrectly, and swapping the operands would
15320 // cause it to handle NaNs incorrectly.
15321 if (!DAG.getTarget().Options.UnsafeFPMath &&
15322 !DAG.isKnownNeverZero(LHS) && !DAG.isKnownNeverZero(RHS)) {
15323 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS))
15325 std::swap(LHS, RHS);
15327 Opcode = X86ISD::FMAX;
15330 // Converting this to a max would handle both negative zeros and NaNs
15331 // incorrectly, but we can swap the operands to fix both.
15332 std::swap(LHS, RHS);
15336 Opcode = X86ISD::FMAX;
15342 return DAG.getNode(Opcode, DL, N->getValueType(0), LHS, RHS);
15345 // If this is a select between two integer constants, try to do some
15347 if (ConstantSDNode *TrueC = dyn_cast<ConstantSDNode>(LHS)) {
15348 if (ConstantSDNode *FalseC = dyn_cast<ConstantSDNode>(RHS))
15349 // Don't do this for crazy integer types.
15350 if (DAG.getTargetLoweringInfo().isTypeLegal(LHS.getValueType())) {
15351 // If this is efficiently invertible, canonicalize the LHSC/RHSC values
15352 // so that TrueC (the true value) is larger than FalseC.
15353 bool NeedsCondInvert = false;
15355 if (TrueC->getAPIntValue().ult(FalseC->getAPIntValue()) &&
15356 // Efficiently invertible.
15357 (Cond.getOpcode() == ISD::SETCC || // setcc -> invertible.
15358 (Cond.getOpcode() == ISD::XOR && // xor(X, C) -> invertible.
15359 isa<ConstantSDNode>(Cond.getOperand(1))))) {
15360 NeedsCondInvert = true;
15361 std::swap(TrueC, FalseC);
15364 // Optimize C ? 8 : 0 -> zext(C) << 3. Likewise for any pow2/0.
15365 if (FalseC->getAPIntValue() == 0 &&
15366 TrueC->getAPIntValue().isPowerOf2()) {
15367 if (NeedsCondInvert) // Invert the condition if needed.
15368 Cond = DAG.getNode(ISD::XOR, DL, Cond.getValueType(), Cond,
15369 DAG.getConstant(1, Cond.getValueType()));
15371 // Zero extend the condition if needed.
15372 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, LHS.getValueType(), Cond);
15374 unsigned ShAmt = TrueC->getAPIntValue().logBase2();
15375 return DAG.getNode(ISD::SHL, DL, LHS.getValueType(), Cond,
15376 DAG.getConstant(ShAmt, MVT::i8));
15379 // Optimize Cond ? cst+1 : cst -> zext(setcc(C)+cst.
15380 if (FalseC->getAPIntValue()+1 == TrueC->getAPIntValue()) {
15381 if (NeedsCondInvert) // Invert the condition if needed.
15382 Cond = DAG.getNode(ISD::XOR, DL, Cond.getValueType(), Cond,
15383 DAG.getConstant(1, Cond.getValueType()));
15385 // Zero extend the condition if needed.
15386 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL,
15387 FalseC->getValueType(0), Cond);
15388 return DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond,
15389 SDValue(FalseC, 0));
15392 // Optimize cases that will turn into an LEA instruction. This requires
15393 // an i32 or i64 and an efficient multiplier (1, 2, 3, 4, 5, 8, 9).
15394 if (N->getValueType(0) == MVT::i32 || N->getValueType(0) == MVT::i64) {
15395 uint64_t Diff = TrueC->getZExtValue()-FalseC->getZExtValue();
15396 if (N->getValueType(0) == MVT::i32) Diff = (unsigned)Diff;
15398 bool isFastMultiplier = false;
15400 switch ((unsigned char)Diff) {
15402 case 1: // result = add base, cond
15403 case 2: // result = lea base( , cond*2)
15404 case 3: // result = lea base(cond, cond*2)
15405 case 4: // result = lea base( , cond*4)
15406 case 5: // result = lea base(cond, cond*4)
15407 case 8: // result = lea base( , cond*8)
15408 case 9: // result = lea base(cond, cond*8)
15409 isFastMultiplier = true;
15414 if (isFastMultiplier) {
15415 APInt Diff = TrueC->getAPIntValue()-FalseC->getAPIntValue();
15416 if (NeedsCondInvert) // Invert the condition if needed.
15417 Cond = DAG.getNode(ISD::XOR, DL, Cond.getValueType(), Cond,
15418 DAG.getConstant(1, Cond.getValueType()));
15420 // Zero extend the condition if needed.
15421 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, FalseC->getValueType(0),
15423 // Scale the condition by the difference.
15425 Cond = DAG.getNode(ISD::MUL, DL, Cond.getValueType(), Cond,
15426 DAG.getConstant(Diff, Cond.getValueType()));
15428 // Add the base if non-zero.
15429 if (FalseC->getAPIntValue() != 0)
15430 Cond = DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond,
15431 SDValue(FalseC, 0));
15438 // Canonicalize max and min:
15439 // (x > y) ? x : y -> (x >= y) ? x : y
15440 // (x < y) ? x : y -> (x <= y) ? x : y
15441 // This allows use of COND_S / COND_NS (see TranslateX86CC) which eliminates
15442 // the need for an extra compare
15443 // against zero. e.g.
15444 // (x - y) > 0 : (x - y) ? 0 -> (x - y) >= 0 : (x - y) ? 0
15446 // testl %edi, %edi
15448 // cmovgl %edi, %eax
15452 // cmovsl %eax, %edi
15453 if (N->getOpcode() == ISD::SELECT && Cond.getOpcode() == ISD::SETCC &&
15454 DAG.isEqualTo(LHS, Cond.getOperand(0)) &&
15455 DAG.isEqualTo(RHS, Cond.getOperand(1))) {
15456 ISD::CondCode CC = cast<CondCodeSDNode>(Cond.getOperand(2))->get();
15461 ISD::CondCode NewCC = (CC == ISD::SETLT) ? ISD::SETLE : ISD::SETGE;
15462 Cond = DAG.getSetCC(Cond.getDebugLoc(), Cond.getValueType(),
15463 Cond.getOperand(0), Cond.getOperand(1), NewCC);
15464 return DAG.getNode(ISD::SELECT, DL, VT, Cond, LHS, RHS);
15469 // Match VSELECTs into subs with unsigned saturation.
15470 if (!DCI.isBeforeLegalize() &&
15471 N->getOpcode() == ISD::VSELECT && Cond.getOpcode() == ISD::SETCC &&
15472 // psubus is available in SSE2 and AVX2 for i8 and i16 vectors.
15473 ((Subtarget->hasSSE2() && (VT == MVT::v16i8 || VT == MVT::v8i16)) ||
15474 (Subtarget->hasAVX2() && (VT == MVT::v32i8 || VT == MVT::v16i16)))) {
15475 ISD::CondCode CC = cast<CondCodeSDNode>(Cond.getOperand(2))->get();
15477 // Check if one of the arms of the VSELECT is a zero vector. If it's on the
15478 // left side invert the predicate to simplify logic below.
15480 if (ISD::isBuildVectorAllZeros(LHS.getNode())) {
15482 CC = ISD::getSetCCInverse(CC, true);
15483 } else if (ISD::isBuildVectorAllZeros(RHS.getNode())) {
15487 if (Other.getNode() && Other->getNumOperands() == 2 &&
15488 DAG.isEqualTo(Other->getOperand(0), Cond.getOperand(0))) {
15489 SDValue OpLHS = Other->getOperand(0), OpRHS = Other->getOperand(1);
15490 SDValue CondRHS = Cond->getOperand(1);
15492 // Look for a general sub with unsigned saturation first.
15493 // x >= y ? x-y : 0 --> subus x, y
15494 // x > y ? x-y : 0 --> subus x, y
15495 if ((CC == ISD::SETUGE || CC == ISD::SETUGT) &&
15496 Other->getOpcode() == ISD::SUB && DAG.isEqualTo(OpRHS, CondRHS))
15497 return DAG.getNode(X86ISD::SUBUS, DL, VT, OpLHS, OpRHS);
15499 // If the RHS is a constant we have to reverse the const canonicalization.
15500 // x > C-1 ? x+-C : 0 --> subus x, C
15501 if (CC == ISD::SETUGT && Other->getOpcode() == ISD::ADD &&
15502 isSplatVector(CondRHS.getNode()) && isSplatVector(OpRHS.getNode())) {
15503 APInt A = cast<ConstantSDNode>(OpRHS.getOperand(0))->getAPIntValue();
15504 if (CondRHS.getConstantOperandVal(0) == -A-1)
15505 return DAG.getNode(X86ISD::SUBUS, DL, VT, OpLHS,
15506 DAG.getConstant(-A, VT));
15509 // Another special case: If C was a sign bit, the sub has been
15510 // canonicalized into a xor.
15511 // FIXME: Would it be better to use ComputeMaskedBits to determine whether
15512 // it's safe to decanonicalize the xor?
15513 // x s< 0 ? x^C : 0 --> subus x, C
15514 if (CC == ISD::SETLT && Other->getOpcode() == ISD::XOR &&
15515 ISD::isBuildVectorAllZeros(CondRHS.getNode()) &&
15516 isSplatVector(OpRHS.getNode())) {
15517 APInt A = cast<ConstantSDNode>(OpRHS.getOperand(0))->getAPIntValue();
15519 return DAG.getNode(X86ISD::SUBUS, DL, VT, OpLHS, OpRHS);
15524 // Try to match a min/max vector operation.
15525 if (!DCI.isBeforeLegalize() &&
15526 N->getOpcode() == ISD::VSELECT && Cond.getOpcode() == ISD::SETCC)
15527 if (unsigned Op = matchIntegerMINMAX(Cond, VT, LHS, RHS, DAG, Subtarget))
15528 return DAG.getNode(Op, DL, N->getValueType(0), LHS, RHS);
15530 // If we know that this node is legal then we know that it is going to be
15531 // matched by one of the SSE/AVX BLEND instructions. These instructions only
15532 // depend on the highest bit in each word. Try to use SimplifyDemandedBits
15533 // to simplify previous instructions.
15534 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
15535 if (N->getOpcode() == ISD::VSELECT && DCI.isBeforeLegalizeOps() &&
15536 !DCI.isBeforeLegalize() && TLI.isOperationLegal(ISD::VSELECT, VT)) {
15537 unsigned BitWidth = Cond.getValueType().getScalarType().getSizeInBits();
15539 // Don't optimize vector selects that map to mask-registers.
15543 assert(BitWidth >= 8 && BitWidth <= 64 && "Invalid mask size");
15544 APInt DemandedMask = APInt::getHighBitsSet(BitWidth, 1);
15546 APInt KnownZero, KnownOne;
15547 TargetLowering::TargetLoweringOpt TLO(DAG, DCI.isBeforeLegalize(),
15548 DCI.isBeforeLegalizeOps());
15549 if (TLO.ShrinkDemandedConstant(Cond, DemandedMask) ||
15550 TLI.SimplifyDemandedBits(Cond, DemandedMask, KnownZero, KnownOne, TLO))
15551 DCI.CommitTargetLoweringOpt(TLO);
15557 // Check whether a boolean test is testing a boolean value generated by
15558 // X86ISD::SETCC. If so, return the operand of that SETCC and proper condition
15561 // Simplify the following patterns:
15562 // (Op (CMP (SETCC Cond EFLAGS) 1) EQ) or
15563 // (Op (CMP (SETCC Cond EFLAGS) 0) NEQ)
15564 // to (Op EFLAGS Cond)
15566 // (Op (CMP (SETCC Cond EFLAGS) 0) EQ) or
15567 // (Op (CMP (SETCC Cond EFLAGS) 1) NEQ)
15568 // to (Op EFLAGS !Cond)
15570 // where Op could be BRCOND or CMOV.
15572 static SDValue checkBoolTestSetCCCombine(SDValue Cmp, X86::CondCode &CC) {
15573 // Quit if not CMP and SUB with its value result used.
15574 if (Cmp.getOpcode() != X86ISD::CMP &&
15575 (Cmp.getOpcode() != X86ISD::SUB || Cmp.getNode()->hasAnyUseOfValue(0)))
15578 // Quit if not used as a boolean value.
15579 if (CC != X86::COND_E && CC != X86::COND_NE)
15582 // Check CMP operands. One of them should be 0 or 1 and the other should be
15583 // an SetCC or extended from it.
15584 SDValue Op1 = Cmp.getOperand(0);
15585 SDValue Op2 = Cmp.getOperand(1);
15588 const ConstantSDNode* C = 0;
15589 bool needOppositeCond = (CC == X86::COND_E);
15591 if ((C = dyn_cast<ConstantSDNode>(Op1)))
15593 else if ((C = dyn_cast<ConstantSDNode>(Op2)))
15595 else // Quit if all operands are not constants.
15598 if (C->getZExtValue() == 1)
15599 needOppositeCond = !needOppositeCond;
15600 else if (C->getZExtValue() != 0)
15601 // Quit if the constant is neither 0 or 1.
15604 // Skip 'zext' node.
15605 if (SetCC.getOpcode() == ISD::ZERO_EXTEND)
15606 SetCC = SetCC.getOperand(0);
15608 switch (SetCC.getOpcode()) {
15609 case X86ISD::SETCC:
15610 // Set the condition code or opposite one if necessary.
15611 CC = X86::CondCode(SetCC.getConstantOperandVal(0));
15612 if (needOppositeCond)
15613 CC = X86::GetOppositeBranchCondition(CC);
15614 return SetCC.getOperand(1);
15615 case X86ISD::CMOV: {
15616 // Check whether false/true value has canonical one, i.e. 0 or 1.
15617 ConstantSDNode *FVal = dyn_cast<ConstantSDNode>(SetCC.getOperand(0));
15618 ConstantSDNode *TVal = dyn_cast<ConstantSDNode>(SetCC.getOperand(1));
15619 // Quit if true value is not a constant.
15622 // Quit if false value is not a constant.
15624 // A special case for rdrand, where 0 is set if false cond is found.
15625 SDValue Op = SetCC.getOperand(0);
15626 if (Op.getOpcode() != X86ISD::RDRAND)
15629 // Quit if false value is not the constant 0 or 1.
15630 bool FValIsFalse = true;
15631 if (FVal && FVal->getZExtValue() != 0) {
15632 if (FVal->getZExtValue() != 1)
15634 // If FVal is 1, opposite cond is needed.
15635 needOppositeCond = !needOppositeCond;
15636 FValIsFalse = false;
15638 // Quit if TVal is not the constant opposite of FVal.
15639 if (FValIsFalse && TVal->getZExtValue() != 1)
15641 if (!FValIsFalse && TVal->getZExtValue() != 0)
15643 CC = X86::CondCode(SetCC.getConstantOperandVal(2));
15644 if (needOppositeCond)
15645 CC = X86::GetOppositeBranchCondition(CC);
15646 return SetCC.getOperand(3);
15653 /// Optimize X86ISD::CMOV [LHS, RHS, CONDCODE (e.g. X86::COND_NE), CONDVAL]
15654 static SDValue PerformCMOVCombine(SDNode *N, SelectionDAG &DAG,
15655 TargetLowering::DAGCombinerInfo &DCI,
15656 const X86Subtarget *Subtarget) {
15657 DebugLoc DL = N->getDebugLoc();
15659 // If the flag operand isn't dead, don't touch this CMOV.
15660 if (N->getNumValues() == 2 && !SDValue(N, 1).use_empty())
15663 SDValue FalseOp = N->getOperand(0);
15664 SDValue TrueOp = N->getOperand(1);
15665 X86::CondCode CC = (X86::CondCode)N->getConstantOperandVal(2);
15666 SDValue Cond = N->getOperand(3);
15668 if (CC == X86::COND_E || CC == X86::COND_NE) {
15669 switch (Cond.getOpcode()) {
15673 // If operand of BSR / BSF are proven never zero, then ZF cannot be set.
15674 if (DAG.isKnownNeverZero(Cond.getOperand(0)))
15675 return (CC == X86::COND_E) ? FalseOp : TrueOp;
15681 Flags = checkBoolTestSetCCCombine(Cond, CC);
15682 if (Flags.getNode() &&
15683 // Extra check as FCMOV only supports a subset of X86 cond.
15684 (FalseOp.getValueType() != MVT::f80 || hasFPCMov(CC))) {
15685 SDValue Ops[] = { FalseOp, TrueOp,
15686 DAG.getConstant(CC, MVT::i8), Flags };
15687 return DAG.getNode(X86ISD::CMOV, DL, N->getVTList(),
15688 Ops, array_lengthof(Ops));
15691 // If this is a select between two integer constants, try to do some
15692 // optimizations. Note that the operands are ordered the opposite of SELECT
15694 if (ConstantSDNode *TrueC = dyn_cast<ConstantSDNode>(TrueOp)) {
15695 if (ConstantSDNode *FalseC = dyn_cast<ConstantSDNode>(FalseOp)) {
15696 // Canonicalize the TrueC/FalseC values so that TrueC (the true value) is
15697 // larger than FalseC (the false value).
15698 if (TrueC->getAPIntValue().ult(FalseC->getAPIntValue())) {
15699 CC = X86::GetOppositeBranchCondition(CC);
15700 std::swap(TrueC, FalseC);
15701 std::swap(TrueOp, FalseOp);
15704 // Optimize C ? 8 : 0 -> zext(setcc(C)) << 3. Likewise for any pow2/0.
15705 // This is efficient for any integer data type (including i8/i16) and
15707 if (FalseC->getAPIntValue() == 0 && TrueC->getAPIntValue().isPowerOf2()) {
15708 Cond = DAG.getNode(X86ISD::SETCC, DL, MVT::i8,
15709 DAG.getConstant(CC, MVT::i8), Cond);
15711 // Zero extend the condition if needed.
15712 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, TrueC->getValueType(0), Cond);
15714 unsigned ShAmt = TrueC->getAPIntValue().logBase2();
15715 Cond = DAG.getNode(ISD::SHL, DL, Cond.getValueType(), Cond,
15716 DAG.getConstant(ShAmt, MVT::i8));
15717 if (N->getNumValues() == 2) // Dead flag value?
15718 return DCI.CombineTo(N, Cond, SDValue());
15722 // Optimize Cond ? cst+1 : cst -> zext(setcc(C)+cst. This is efficient
15723 // for any integer data type, including i8/i16.
15724 if (FalseC->getAPIntValue()+1 == TrueC->getAPIntValue()) {
15725 Cond = DAG.getNode(X86ISD::SETCC, DL, MVT::i8,
15726 DAG.getConstant(CC, MVT::i8), Cond);
15728 // Zero extend the condition if needed.
15729 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL,
15730 FalseC->getValueType(0), Cond);
15731 Cond = DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond,
15732 SDValue(FalseC, 0));
15734 if (N->getNumValues() == 2) // Dead flag value?
15735 return DCI.CombineTo(N, Cond, SDValue());
15739 // Optimize cases that will turn into an LEA instruction. This requires
15740 // an i32 or i64 and an efficient multiplier (1, 2, 3, 4, 5, 8, 9).
15741 if (N->getValueType(0) == MVT::i32 || N->getValueType(0) == MVT::i64) {
15742 uint64_t Diff = TrueC->getZExtValue()-FalseC->getZExtValue();
15743 if (N->getValueType(0) == MVT::i32) Diff = (unsigned)Diff;
15745 bool isFastMultiplier = false;
15747 switch ((unsigned char)Diff) {
15749 case 1: // result = add base, cond
15750 case 2: // result = lea base( , cond*2)
15751 case 3: // result = lea base(cond, cond*2)
15752 case 4: // result = lea base( , cond*4)
15753 case 5: // result = lea base(cond, cond*4)
15754 case 8: // result = lea base( , cond*8)
15755 case 9: // result = lea base(cond, cond*8)
15756 isFastMultiplier = true;
15761 if (isFastMultiplier) {
15762 APInt Diff = TrueC->getAPIntValue()-FalseC->getAPIntValue();
15763 Cond = DAG.getNode(X86ISD::SETCC, DL, MVT::i8,
15764 DAG.getConstant(CC, MVT::i8), Cond);
15765 // Zero extend the condition if needed.
15766 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, FalseC->getValueType(0),
15768 // Scale the condition by the difference.
15770 Cond = DAG.getNode(ISD::MUL, DL, Cond.getValueType(), Cond,
15771 DAG.getConstant(Diff, Cond.getValueType()));
15773 // Add the base if non-zero.
15774 if (FalseC->getAPIntValue() != 0)
15775 Cond = DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond,
15776 SDValue(FalseC, 0));
15777 if (N->getNumValues() == 2) // Dead flag value?
15778 return DCI.CombineTo(N, Cond, SDValue());
15785 // Handle these cases:
15786 // (select (x != c), e, c) -> select (x != c), e, x),
15787 // (select (x == c), c, e) -> select (x == c), x, e)
15788 // where the c is an integer constant, and the "select" is the combination
15789 // of CMOV and CMP.
15791 // The rationale for this change is that the conditional-move from a constant
15792 // needs two instructions, however, conditional-move from a register needs
15793 // only one instruction.
15795 // CAVEAT: By replacing a constant with a symbolic value, it may obscure
15796 // some instruction-combining opportunities. This opt needs to be
15797 // postponed as late as possible.
15799 if (!DCI.isBeforeLegalize() && !DCI.isBeforeLegalizeOps()) {
15800 // the DCI.xxxx conditions are provided to postpone the optimization as
15801 // late as possible.
15803 ConstantSDNode *CmpAgainst = 0;
15804 if ((Cond.getOpcode() == X86ISD::CMP || Cond.getOpcode() == X86ISD::SUB) &&
15805 (CmpAgainst = dyn_cast<ConstantSDNode>(Cond.getOperand(1))) &&
15806 !isa<ConstantSDNode>(Cond.getOperand(0))) {
15808 if (CC == X86::COND_NE &&
15809 CmpAgainst == dyn_cast<ConstantSDNode>(FalseOp)) {
15810 CC = X86::GetOppositeBranchCondition(CC);
15811 std::swap(TrueOp, FalseOp);
15814 if (CC == X86::COND_E &&
15815 CmpAgainst == dyn_cast<ConstantSDNode>(TrueOp)) {
15816 SDValue Ops[] = { FalseOp, Cond.getOperand(0),
15817 DAG.getConstant(CC, MVT::i8), Cond };
15818 return DAG.getNode(X86ISD::CMOV, DL, N->getVTList (), Ops,
15819 array_lengthof(Ops));
15827 /// PerformMulCombine - Optimize a single multiply with constant into two
15828 /// in order to implement it with two cheaper instructions, e.g.
15829 /// LEA + SHL, LEA + LEA.
15830 static SDValue PerformMulCombine(SDNode *N, SelectionDAG &DAG,
15831 TargetLowering::DAGCombinerInfo &DCI) {
15832 if (DCI.isBeforeLegalize() || DCI.isCalledByLegalizer())
15835 EVT VT = N->getValueType(0);
15836 if (VT != MVT::i64)
15839 ConstantSDNode *C = dyn_cast<ConstantSDNode>(N->getOperand(1));
15842 uint64_t MulAmt = C->getZExtValue();
15843 if (isPowerOf2_64(MulAmt) || MulAmt == 3 || MulAmt == 5 || MulAmt == 9)
15846 uint64_t MulAmt1 = 0;
15847 uint64_t MulAmt2 = 0;
15848 if ((MulAmt % 9) == 0) {
15850 MulAmt2 = MulAmt / 9;
15851 } else if ((MulAmt % 5) == 0) {
15853 MulAmt2 = MulAmt / 5;
15854 } else if ((MulAmt % 3) == 0) {
15856 MulAmt2 = MulAmt / 3;
15859 (isPowerOf2_64(MulAmt2) || MulAmt2 == 3 || MulAmt2 == 5 || MulAmt2 == 9)){
15860 DebugLoc DL = N->getDebugLoc();
15862 if (isPowerOf2_64(MulAmt2) &&
15863 !(N->hasOneUse() && N->use_begin()->getOpcode() == ISD::ADD))
15864 // If second multiplifer is pow2, issue it first. We want the multiply by
15865 // 3, 5, or 9 to be folded into the addressing mode unless the lone use
15867 std::swap(MulAmt1, MulAmt2);
15870 if (isPowerOf2_64(MulAmt1))
15871 NewMul = DAG.getNode(ISD::SHL, DL, VT, N->getOperand(0),
15872 DAG.getConstant(Log2_64(MulAmt1), MVT::i8));
15874 NewMul = DAG.getNode(X86ISD::MUL_IMM, DL, VT, N->getOperand(0),
15875 DAG.getConstant(MulAmt1, VT));
15877 if (isPowerOf2_64(MulAmt2))
15878 NewMul = DAG.getNode(ISD::SHL, DL, VT, NewMul,
15879 DAG.getConstant(Log2_64(MulAmt2), MVT::i8));
15881 NewMul = DAG.getNode(X86ISD::MUL_IMM, DL, VT, NewMul,
15882 DAG.getConstant(MulAmt2, VT));
15884 // Do not add new nodes to DAG combiner worklist.
15885 DCI.CombineTo(N, NewMul, false);
15890 static SDValue PerformSHLCombine(SDNode *N, SelectionDAG &DAG) {
15891 SDValue N0 = N->getOperand(0);
15892 SDValue N1 = N->getOperand(1);
15893 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1);
15894 EVT VT = N0.getValueType();
15896 // fold (shl (and (setcc_c), c1), c2) -> (and setcc_c, (c1 << c2))
15897 // since the result of setcc_c is all zero's or all ones.
15898 if (VT.isInteger() && !VT.isVector() &&
15899 N1C && N0.getOpcode() == ISD::AND &&
15900 N0.getOperand(1).getOpcode() == ISD::Constant) {
15901 SDValue N00 = N0.getOperand(0);
15902 if (N00.getOpcode() == X86ISD::SETCC_CARRY ||
15903 ((N00.getOpcode() == ISD::ANY_EXTEND ||
15904 N00.getOpcode() == ISD::ZERO_EXTEND) &&
15905 N00.getOperand(0).getOpcode() == X86ISD::SETCC_CARRY)) {
15906 APInt Mask = cast<ConstantSDNode>(N0.getOperand(1))->getAPIntValue();
15907 APInt ShAmt = N1C->getAPIntValue();
15908 Mask = Mask.shl(ShAmt);
15910 return DAG.getNode(ISD::AND, N->getDebugLoc(), VT,
15911 N00, DAG.getConstant(Mask, VT));
15915 // Hardware support for vector shifts is sparse which makes us scalarize the
15916 // vector operations in many cases. Also, on sandybridge ADD is faster than
15918 // (shl V, 1) -> add V,V
15919 if (isSplatVector(N1.getNode())) {
15920 assert(N0.getValueType().isVector() && "Invalid vector shift type");
15921 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1->getOperand(0));
15922 // We shift all of the values by one. In many cases we do not have
15923 // hardware support for this operation. This is better expressed as an ADD
15925 if (N1C && (1 == N1C->getZExtValue())) {
15926 return DAG.getNode(ISD::ADD, N->getDebugLoc(), VT, N0, N0);
15933 /// PerformShiftCombine - Transforms vector shift nodes to use vector shifts
15935 static SDValue PerformShiftCombine(SDNode* N, SelectionDAG &DAG,
15936 TargetLowering::DAGCombinerInfo &DCI,
15937 const X86Subtarget *Subtarget) {
15938 EVT VT = N->getValueType(0);
15939 if (N->getOpcode() == ISD::SHL) {
15940 SDValue V = PerformSHLCombine(N, DAG);
15941 if (V.getNode()) return V;
15944 // On X86 with SSE2 support, we can transform this to a vector shift if
15945 // all elements are shifted by the same amount. We can't do this in legalize
15946 // because the a constant vector is typically transformed to a constant pool
15947 // so we have no knowledge of the shift amount.
15948 if (!Subtarget->hasSSE2())
15951 if (VT != MVT::v2i64 && VT != MVT::v4i32 && VT != MVT::v8i16 &&
15952 (!Subtarget->hasInt256() ||
15953 (VT != MVT::v4i64 && VT != MVT::v8i32 && VT != MVT::v16i16)))
15956 SDValue ShAmtOp = N->getOperand(1);
15957 EVT EltVT = VT.getVectorElementType();
15958 DebugLoc DL = N->getDebugLoc();
15959 SDValue BaseShAmt = SDValue();
15960 if (ShAmtOp.getOpcode() == ISD::BUILD_VECTOR) {
15961 unsigned NumElts = VT.getVectorNumElements();
15963 for (; i != NumElts; ++i) {
15964 SDValue Arg = ShAmtOp.getOperand(i);
15965 if (Arg.getOpcode() == ISD::UNDEF) continue;
15969 // Handle the case where the build_vector is all undef
15970 // FIXME: Should DAG allow this?
15974 for (; i != NumElts; ++i) {
15975 SDValue Arg = ShAmtOp.getOperand(i);
15976 if (Arg.getOpcode() == ISD::UNDEF) continue;
15977 if (Arg != BaseShAmt) {
15981 } else if (ShAmtOp.getOpcode() == ISD::VECTOR_SHUFFLE &&
15982 cast<ShuffleVectorSDNode>(ShAmtOp)->isSplat()) {
15983 SDValue InVec = ShAmtOp.getOperand(0);
15984 if (InVec.getOpcode() == ISD::BUILD_VECTOR) {
15985 unsigned NumElts = InVec.getValueType().getVectorNumElements();
15987 for (; i != NumElts; ++i) {
15988 SDValue Arg = InVec.getOperand(i);
15989 if (Arg.getOpcode() == ISD::UNDEF) continue;
15993 } else if (InVec.getOpcode() == ISD::INSERT_VECTOR_ELT) {
15994 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(InVec.getOperand(2))) {
15995 unsigned SplatIdx= cast<ShuffleVectorSDNode>(ShAmtOp)->getSplatIndex();
15996 if (C->getZExtValue() == SplatIdx)
15997 BaseShAmt = InVec.getOperand(1);
16000 if (BaseShAmt.getNode() == 0) {
16001 // Don't create instructions with illegal types after legalize
16003 if (!DAG.getTargetLoweringInfo().isTypeLegal(EltVT) &&
16004 !DCI.isBeforeLegalize())
16007 BaseShAmt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, EltVT, ShAmtOp,
16008 DAG.getIntPtrConstant(0));
16013 // The shift amount is an i32.
16014 if (EltVT.bitsGT(MVT::i32))
16015 BaseShAmt = DAG.getNode(ISD::TRUNCATE, DL, MVT::i32, BaseShAmt);
16016 else if (EltVT.bitsLT(MVT::i32))
16017 BaseShAmt = DAG.getNode(ISD::ZERO_EXTEND, DL, MVT::i32, BaseShAmt);
16019 // The shift amount is identical so we can do a vector shift.
16020 SDValue ValOp = N->getOperand(0);
16021 switch (N->getOpcode()) {
16023 llvm_unreachable("Unknown shift opcode!");
16025 switch (VT.getSimpleVT().SimpleTy) {
16026 default: return SDValue();
16033 return getTargetVShiftNode(X86ISD::VSHLI, DL, VT, ValOp, BaseShAmt, DAG);
16036 switch (VT.getSimpleVT().SimpleTy) {
16037 default: return SDValue();
16042 return getTargetVShiftNode(X86ISD::VSRAI, DL, VT, ValOp, BaseShAmt, DAG);
16045 switch (VT.getSimpleVT().SimpleTy) {
16046 default: return SDValue();
16053 return getTargetVShiftNode(X86ISD::VSRLI, DL, VT, ValOp, BaseShAmt, DAG);
16058 // CMPEQCombine - Recognize the distinctive (AND (setcc ...) (setcc ..))
16059 // where both setccs reference the same FP CMP, and rewrite for CMPEQSS
16060 // and friends. Likewise for OR -> CMPNEQSS.
16061 static SDValue CMPEQCombine(SDNode *N, SelectionDAG &DAG,
16062 TargetLowering::DAGCombinerInfo &DCI,
16063 const X86Subtarget *Subtarget) {
16066 // SSE1 supports CMP{eq|ne}SS, and SSE2 added CMP{eq|ne}SD, but
16067 // we're requiring SSE2 for both.
16068 if (Subtarget->hasSSE2() && isAndOrOfSetCCs(SDValue(N, 0U), opcode)) {
16069 SDValue N0 = N->getOperand(0);
16070 SDValue N1 = N->getOperand(1);
16071 SDValue CMP0 = N0->getOperand(1);
16072 SDValue CMP1 = N1->getOperand(1);
16073 DebugLoc DL = N->getDebugLoc();
16075 // The SETCCs should both refer to the same CMP.
16076 if (CMP0.getOpcode() != X86ISD::CMP || CMP0 != CMP1)
16079 SDValue CMP00 = CMP0->getOperand(0);
16080 SDValue CMP01 = CMP0->getOperand(1);
16081 EVT VT = CMP00.getValueType();
16083 if (VT == MVT::f32 || VT == MVT::f64) {
16084 bool ExpectingFlags = false;
16085 // Check for any users that want flags:
16086 for (SDNode::use_iterator UI = N->use_begin(), UE = N->use_end();
16087 !ExpectingFlags && UI != UE; ++UI)
16088 switch (UI->getOpcode()) {
16093 ExpectingFlags = true;
16095 case ISD::CopyToReg:
16096 case ISD::SIGN_EXTEND:
16097 case ISD::ZERO_EXTEND:
16098 case ISD::ANY_EXTEND:
16102 if (!ExpectingFlags) {
16103 enum X86::CondCode cc0 = (enum X86::CondCode)N0.getConstantOperandVal(0);
16104 enum X86::CondCode cc1 = (enum X86::CondCode)N1.getConstantOperandVal(0);
16106 if (cc1 == X86::COND_E || cc1 == X86::COND_NE) {
16107 X86::CondCode tmp = cc0;
16112 if ((cc0 == X86::COND_E && cc1 == X86::COND_NP) ||
16113 (cc0 == X86::COND_NE && cc1 == X86::COND_P)) {
16114 bool is64BitFP = (CMP00.getValueType() == MVT::f64);
16115 X86ISD::NodeType NTOperator = is64BitFP ?
16116 X86ISD::FSETCCsd : X86ISD::FSETCCss;
16117 // FIXME: need symbolic constants for these magic numbers.
16118 // See X86ATTInstPrinter.cpp:printSSECC().
16119 unsigned x86cc = (cc0 == X86::COND_E) ? 0 : 4;
16120 SDValue OnesOrZeroesF = DAG.getNode(NTOperator, DL, MVT::f32, CMP00, CMP01,
16121 DAG.getConstant(x86cc, MVT::i8));
16122 SDValue OnesOrZeroesI = DAG.getNode(ISD::BITCAST, DL, MVT::i32,
16124 SDValue ANDed = DAG.getNode(ISD::AND, DL, MVT::i32, OnesOrZeroesI,
16125 DAG.getConstant(1, MVT::i32));
16126 SDValue OneBitOfTruth = DAG.getNode(ISD::TRUNCATE, DL, MVT::i8, ANDed);
16127 return OneBitOfTruth;
16135 /// CanFoldXORWithAllOnes - Test whether the XOR operand is a AllOnes vector
16136 /// so it can be folded inside ANDNP.
16137 static bool CanFoldXORWithAllOnes(const SDNode *N) {
16138 EVT VT = N->getValueType(0);
16140 // Match direct AllOnes for 128 and 256-bit vectors
16141 if (ISD::isBuildVectorAllOnes(N))
16144 // Look through a bit convert.
16145 if (N->getOpcode() == ISD::BITCAST)
16146 N = N->getOperand(0).getNode();
16148 // Sometimes the operand may come from a insert_subvector building a 256-bit
16150 if (VT.is256BitVector() &&
16151 N->getOpcode() == ISD::INSERT_SUBVECTOR) {
16152 SDValue V1 = N->getOperand(0);
16153 SDValue V2 = N->getOperand(1);
16155 if (V1.getOpcode() == ISD::INSERT_SUBVECTOR &&
16156 V1.getOperand(0).getOpcode() == ISD::UNDEF &&
16157 ISD::isBuildVectorAllOnes(V1.getOperand(1).getNode()) &&
16158 ISD::isBuildVectorAllOnes(V2.getNode()))
16165 // On AVX/AVX2 the type v8i1 is legalized to v8i16, which is an XMM sized
16166 // register. In most cases we actually compare or select YMM-sized registers
16167 // and mixing the two types creates horrible code. This method optimizes
16168 // some of the transition sequences.
16169 static SDValue WidenMaskArithmetic(SDNode *N, SelectionDAG &DAG,
16170 TargetLowering::DAGCombinerInfo &DCI,
16171 const X86Subtarget *Subtarget) {
16172 EVT VT = N->getValueType(0);
16173 if (!VT.is256BitVector())
16176 assert((N->getOpcode() == ISD::ANY_EXTEND ||
16177 N->getOpcode() == ISD::ZERO_EXTEND ||
16178 N->getOpcode() == ISD::SIGN_EXTEND) && "Invalid Node");
16180 SDValue Narrow = N->getOperand(0);
16181 EVT NarrowVT = Narrow->getValueType(0);
16182 if (!NarrowVT.is128BitVector())
16185 if (Narrow->getOpcode() != ISD::XOR &&
16186 Narrow->getOpcode() != ISD::AND &&
16187 Narrow->getOpcode() != ISD::OR)
16190 SDValue N0 = Narrow->getOperand(0);
16191 SDValue N1 = Narrow->getOperand(1);
16192 DebugLoc DL = Narrow->getDebugLoc();
16194 // The Left side has to be a trunc.
16195 if (N0.getOpcode() != ISD::TRUNCATE)
16198 // The type of the truncated inputs.
16199 EVT WideVT = N0->getOperand(0)->getValueType(0);
16203 // The right side has to be a 'trunc' or a constant vector.
16204 bool RHSTrunc = N1.getOpcode() == ISD::TRUNCATE;
16205 bool RHSConst = (isSplatVector(N1.getNode()) &&
16206 isa<ConstantSDNode>(N1->getOperand(0)));
16207 if (!RHSTrunc && !RHSConst)
16210 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
16212 if (!TLI.isOperationLegalOrPromote(Narrow->getOpcode(), WideVT))
16215 // Set N0 and N1 to hold the inputs to the new wide operation.
16216 N0 = N0->getOperand(0);
16218 N1 = DAG.getNode(ISD::ZERO_EXTEND, DL, WideVT.getScalarType(),
16219 N1->getOperand(0));
16220 SmallVector<SDValue, 8> C(WideVT.getVectorNumElements(), N1);
16221 N1 = DAG.getNode(ISD::BUILD_VECTOR, DL, WideVT, &C[0], C.size());
16222 } else if (RHSTrunc) {
16223 N1 = N1->getOperand(0);
16226 // Generate the wide operation.
16227 SDValue Op = DAG.getNode(Narrow->getOpcode(), DL, WideVT, N0, N1);
16228 unsigned Opcode = N->getOpcode();
16230 case ISD::ANY_EXTEND:
16232 case ISD::ZERO_EXTEND: {
16233 unsigned InBits = NarrowVT.getScalarType().getSizeInBits();
16234 APInt Mask = APInt::getAllOnesValue(InBits);
16235 Mask = Mask.zext(VT.getScalarType().getSizeInBits());
16236 return DAG.getNode(ISD::AND, DL, VT,
16237 Op, DAG.getConstant(Mask, VT));
16239 case ISD::SIGN_EXTEND:
16240 return DAG.getNode(ISD::SIGN_EXTEND_INREG, DL, VT,
16241 Op, DAG.getValueType(NarrowVT));
16243 llvm_unreachable("Unexpected opcode");
16247 static SDValue PerformAndCombine(SDNode *N, SelectionDAG &DAG,
16248 TargetLowering::DAGCombinerInfo &DCI,
16249 const X86Subtarget *Subtarget) {
16250 EVT VT = N->getValueType(0);
16251 if (DCI.isBeforeLegalizeOps())
16254 SDValue R = CMPEQCombine(N, DAG, DCI, Subtarget);
16258 // Create BLSI, and BLSR instructions
16259 // BLSI is X & (-X)
16260 // BLSR is X & (X-1)
16261 if (Subtarget->hasBMI() && (VT == MVT::i32 || VT == MVT::i64)) {
16262 SDValue N0 = N->getOperand(0);
16263 SDValue N1 = N->getOperand(1);
16264 DebugLoc DL = N->getDebugLoc();
16266 // Check LHS for neg
16267 if (N0.getOpcode() == ISD::SUB && N0.getOperand(1) == N1 &&
16268 isZero(N0.getOperand(0)))
16269 return DAG.getNode(X86ISD::BLSI, DL, VT, N1);
16271 // Check RHS for neg
16272 if (N1.getOpcode() == ISD::SUB && N1.getOperand(1) == N0 &&
16273 isZero(N1.getOperand(0)))
16274 return DAG.getNode(X86ISD::BLSI, DL, VT, N0);
16276 // Check LHS for X-1
16277 if (N0.getOpcode() == ISD::ADD && N0.getOperand(0) == N1 &&
16278 isAllOnes(N0.getOperand(1)))
16279 return DAG.getNode(X86ISD::BLSR, DL, VT, N1);
16281 // Check RHS for X-1
16282 if (N1.getOpcode() == ISD::ADD && N1.getOperand(0) == N0 &&
16283 isAllOnes(N1.getOperand(1)))
16284 return DAG.getNode(X86ISD::BLSR, DL, VT, N0);
16289 // Want to form ANDNP nodes:
16290 // 1) In the hopes of then easily combining them with OR and AND nodes
16291 // to form PBLEND/PSIGN.
16292 // 2) To match ANDN packed intrinsics
16293 if (VT != MVT::v2i64 && VT != MVT::v4i64)
16296 SDValue N0 = N->getOperand(0);
16297 SDValue N1 = N->getOperand(1);
16298 DebugLoc DL = N->getDebugLoc();
16300 // Check LHS for vnot
16301 if (N0.getOpcode() == ISD::XOR &&
16302 //ISD::isBuildVectorAllOnes(N0.getOperand(1).getNode()))
16303 CanFoldXORWithAllOnes(N0.getOperand(1).getNode()))
16304 return DAG.getNode(X86ISD::ANDNP, DL, VT, N0.getOperand(0), N1);
16306 // Check RHS for vnot
16307 if (N1.getOpcode() == ISD::XOR &&
16308 //ISD::isBuildVectorAllOnes(N1.getOperand(1).getNode()))
16309 CanFoldXORWithAllOnes(N1.getOperand(1).getNode()))
16310 return DAG.getNode(X86ISD::ANDNP, DL, VT, N1.getOperand(0), N0);
16315 static SDValue PerformOrCombine(SDNode *N, SelectionDAG &DAG,
16316 TargetLowering::DAGCombinerInfo &DCI,
16317 const X86Subtarget *Subtarget) {
16318 EVT VT = N->getValueType(0);
16319 if (DCI.isBeforeLegalizeOps())
16322 SDValue R = CMPEQCombine(N, DAG, DCI, Subtarget);
16326 SDValue N0 = N->getOperand(0);
16327 SDValue N1 = N->getOperand(1);
16329 // look for psign/blend
16330 if (VT == MVT::v2i64 || VT == MVT::v4i64) {
16331 if (!Subtarget->hasSSSE3() ||
16332 (VT == MVT::v4i64 && !Subtarget->hasInt256()))
16335 // Canonicalize pandn to RHS
16336 if (N0.getOpcode() == X86ISD::ANDNP)
16338 // or (and (m, y), (pandn m, x))
16339 if (N0.getOpcode() == ISD::AND && N1.getOpcode() == X86ISD::ANDNP) {
16340 SDValue Mask = N1.getOperand(0);
16341 SDValue X = N1.getOperand(1);
16343 if (N0.getOperand(0) == Mask)
16344 Y = N0.getOperand(1);
16345 if (N0.getOperand(1) == Mask)
16346 Y = N0.getOperand(0);
16348 // Check to see if the mask appeared in both the AND and ANDNP and
16352 // Validate that X, Y, and Mask are BIT_CONVERTS, and see through them.
16353 // Look through mask bitcast.
16354 if (Mask.getOpcode() == ISD::BITCAST)
16355 Mask = Mask.getOperand(0);
16356 if (X.getOpcode() == ISD::BITCAST)
16357 X = X.getOperand(0);
16358 if (Y.getOpcode() == ISD::BITCAST)
16359 Y = Y.getOperand(0);
16361 EVT MaskVT = Mask.getValueType();
16363 // Validate that the Mask operand is a vector sra node.
16364 // FIXME: what to do for bytes, since there is a psignb/pblendvb, but
16365 // there is no psrai.b
16366 if (Mask.getOpcode() != X86ISD::VSRAI)
16369 // Check that the SRA is all signbits.
16370 SDValue SraC = Mask.getOperand(1);
16371 unsigned SraAmt = cast<ConstantSDNode>(SraC)->getZExtValue();
16372 unsigned EltBits = MaskVT.getVectorElementType().getSizeInBits();
16373 if ((SraAmt + 1) != EltBits)
16376 DebugLoc DL = N->getDebugLoc();
16378 // Now we know we at least have a plendvb with the mask val. See if
16379 // we can form a psignb/w/d.
16380 // psign = x.type == y.type == mask.type && y = sub(0, x);
16381 if (Y.getOpcode() == ISD::SUB && Y.getOperand(1) == X &&
16382 ISD::isBuildVectorAllZeros(Y.getOperand(0).getNode()) &&
16383 X.getValueType() == MaskVT && Y.getValueType() == MaskVT) {
16384 assert((EltBits == 8 || EltBits == 16 || EltBits == 32) &&
16385 "Unsupported VT for PSIGN");
16386 Mask = DAG.getNode(X86ISD::PSIGN, DL, MaskVT, X, Mask.getOperand(0));
16387 return DAG.getNode(ISD::BITCAST, DL, VT, Mask);
16389 // PBLENDVB only available on SSE 4.1
16390 if (!Subtarget->hasSSE41())
16393 EVT BlendVT = (VT == MVT::v4i64) ? MVT::v32i8 : MVT::v16i8;
16395 X = DAG.getNode(ISD::BITCAST, DL, BlendVT, X);
16396 Y = DAG.getNode(ISD::BITCAST, DL, BlendVT, Y);
16397 Mask = DAG.getNode(ISD::BITCAST, DL, BlendVT, Mask);
16398 Mask = DAG.getNode(ISD::VSELECT, DL, BlendVT, Mask, Y, X);
16399 return DAG.getNode(ISD::BITCAST, DL, VT, Mask);
16403 if (VT != MVT::i16 && VT != MVT::i32 && VT != MVT::i64)
16406 // fold (or (x << c) | (y >> (64 - c))) ==> (shld64 x, y, c)
16407 if (N0.getOpcode() == ISD::SRL && N1.getOpcode() == ISD::SHL)
16409 if (N0.getOpcode() != ISD::SHL || N1.getOpcode() != ISD::SRL)
16411 if (!N0.hasOneUse() || !N1.hasOneUse())
16414 SDValue ShAmt0 = N0.getOperand(1);
16415 if (ShAmt0.getValueType() != MVT::i8)
16417 SDValue ShAmt1 = N1.getOperand(1);
16418 if (ShAmt1.getValueType() != MVT::i8)
16420 if (ShAmt0.getOpcode() == ISD::TRUNCATE)
16421 ShAmt0 = ShAmt0.getOperand(0);
16422 if (ShAmt1.getOpcode() == ISD::TRUNCATE)
16423 ShAmt1 = ShAmt1.getOperand(0);
16425 DebugLoc DL = N->getDebugLoc();
16426 unsigned Opc = X86ISD::SHLD;
16427 SDValue Op0 = N0.getOperand(0);
16428 SDValue Op1 = N1.getOperand(0);
16429 if (ShAmt0.getOpcode() == ISD::SUB) {
16430 Opc = X86ISD::SHRD;
16431 std::swap(Op0, Op1);
16432 std::swap(ShAmt0, ShAmt1);
16435 unsigned Bits = VT.getSizeInBits();
16436 if (ShAmt1.getOpcode() == ISD::SUB) {
16437 SDValue Sum = ShAmt1.getOperand(0);
16438 if (ConstantSDNode *SumC = dyn_cast<ConstantSDNode>(Sum)) {
16439 SDValue ShAmt1Op1 = ShAmt1.getOperand(1);
16440 if (ShAmt1Op1.getNode()->getOpcode() == ISD::TRUNCATE)
16441 ShAmt1Op1 = ShAmt1Op1.getOperand(0);
16442 if (SumC->getSExtValue() == Bits && ShAmt1Op1 == ShAmt0)
16443 return DAG.getNode(Opc, DL, VT,
16445 DAG.getNode(ISD::TRUNCATE, DL,
16448 } else if (ConstantSDNode *ShAmt1C = dyn_cast<ConstantSDNode>(ShAmt1)) {
16449 ConstantSDNode *ShAmt0C = dyn_cast<ConstantSDNode>(ShAmt0);
16451 ShAmt0C->getSExtValue() + ShAmt1C->getSExtValue() == Bits)
16452 return DAG.getNode(Opc, DL, VT,
16453 N0.getOperand(0), N1.getOperand(0),
16454 DAG.getNode(ISD::TRUNCATE, DL,
16461 // Generate NEG and CMOV for integer abs.
16462 static SDValue performIntegerAbsCombine(SDNode *N, SelectionDAG &DAG) {
16463 EVT VT = N->getValueType(0);
16465 // Since X86 does not have CMOV for 8-bit integer, we don't convert
16466 // 8-bit integer abs to NEG and CMOV.
16467 if (VT.isInteger() && VT.getSizeInBits() == 8)
16470 SDValue N0 = N->getOperand(0);
16471 SDValue N1 = N->getOperand(1);
16472 DebugLoc DL = N->getDebugLoc();
16474 // Check pattern of XOR(ADD(X,Y), Y) where Y is SRA(X, size(X)-1)
16475 // and change it to SUB and CMOV.
16476 if (VT.isInteger() && N->getOpcode() == ISD::XOR &&
16477 N0.getOpcode() == ISD::ADD &&
16478 N0.getOperand(1) == N1 &&
16479 N1.getOpcode() == ISD::SRA &&
16480 N1.getOperand(0) == N0.getOperand(0))
16481 if (ConstantSDNode *Y1C = dyn_cast<ConstantSDNode>(N1.getOperand(1)))
16482 if (Y1C->getAPIntValue() == VT.getSizeInBits()-1) {
16483 // Generate SUB & CMOV.
16484 SDValue Neg = DAG.getNode(X86ISD::SUB, DL, DAG.getVTList(VT, MVT::i32),
16485 DAG.getConstant(0, VT), N0.getOperand(0));
16487 SDValue Ops[] = { N0.getOperand(0), Neg,
16488 DAG.getConstant(X86::COND_GE, MVT::i8),
16489 SDValue(Neg.getNode(), 1) };
16490 return DAG.getNode(X86ISD::CMOV, DL, DAG.getVTList(VT, MVT::Glue),
16491 Ops, array_lengthof(Ops));
16496 // PerformXorCombine - Attempts to turn XOR nodes into BLSMSK nodes
16497 static SDValue PerformXorCombine(SDNode *N, SelectionDAG &DAG,
16498 TargetLowering::DAGCombinerInfo &DCI,
16499 const X86Subtarget *Subtarget) {
16500 EVT VT = N->getValueType(0);
16501 if (DCI.isBeforeLegalizeOps())
16504 if (Subtarget->hasCMov()) {
16505 SDValue RV = performIntegerAbsCombine(N, DAG);
16510 // Try forming BMI if it is available.
16511 if (!Subtarget->hasBMI())
16514 if (VT != MVT::i32 && VT != MVT::i64)
16517 assert(Subtarget->hasBMI() && "Creating BLSMSK requires BMI instructions");
16519 // Create BLSMSK instructions by finding X ^ (X-1)
16520 SDValue N0 = N->getOperand(0);
16521 SDValue N1 = N->getOperand(1);
16522 DebugLoc DL = N->getDebugLoc();
16524 if (N0.getOpcode() == ISD::ADD && N0.getOperand(0) == N1 &&
16525 isAllOnes(N0.getOperand(1)))
16526 return DAG.getNode(X86ISD::BLSMSK, DL, VT, N1);
16528 if (N1.getOpcode() == ISD::ADD && N1.getOperand(0) == N0 &&
16529 isAllOnes(N1.getOperand(1)))
16530 return DAG.getNode(X86ISD::BLSMSK, DL, VT, N0);
16535 /// PerformLOADCombine - Do target-specific dag combines on LOAD nodes.
16536 static SDValue PerformLOADCombine(SDNode *N, SelectionDAG &DAG,
16537 TargetLowering::DAGCombinerInfo &DCI,
16538 const X86Subtarget *Subtarget) {
16539 LoadSDNode *Ld = cast<LoadSDNode>(N);
16540 EVT RegVT = Ld->getValueType(0);
16541 EVT MemVT = Ld->getMemoryVT();
16542 DebugLoc dl = Ld->getDebugLoc();
16543 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
16544 unsigned RegSz = RegVT.getSizeInBits();
16546 ISD::LoadExtType Ext = Ld->getExtensionType();
16547 unsigned Alignment = Ld->getAlignment();
16548 bool IsAligned = Alignment == 0 || Alignment == MemVT.getSizeInBits()/8;
16550 // On Sandybridge unaligned 256bit loads are inefficient.
16551 if (RegVT.is256BitVector() && !Subtarget->hasInt256() &&
16552 !DCI.isBeforeLegalizeOps() && !IsAligned && Ext == ISD::NON_EXTLOAD) {
16553 unsigned NumElems = RegVT.getVectorNumElements();
16557 SDValue Ptr = Ld->getBasePtr();
16558 SDValue Increment = DAG.getConstant(16, TLI.getPointerTy());
16560 EVT HalfVT = EVT::getVectorVT(*DAG.getContext(), MemVT.getScalarType(),
16562 SDValue Load1 = DAG.getLoad(HalfVT, dl, Ld->getChain(), Ptr,
16563 Ld->getPointerInfo(), Ld->isVolatile(),
16564 Ld->isNonTemporal(), Ld->isInvariant(),
16566 Ptr = DAG.getNode(ISD::ADD, dl, Ptr.getValueType(), Ptr, Increment);
16567 SDValue Load2 = DAG.getLoad(HalfVT, dl, Ld->getChain(), Ptr,
16568 Ld->getPointerInfo(), Ld->isVolatile(),
16569 Ld->isNonTemporal(), Ld->isInvariant(),
16570 std::max(Alignment/2U, 1U));
16571 SDValue TF = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
16573 Load2.getValue(1));
16575 SDValue NewVec = DAG.getUNDEF(RegVT);
16576 NewVec = Insert128BitVector(NewVec, Load1, 0, DAG, dl);
16577 NewVec = Insert128BitVector(NewVec, Load2, NumElems/2, DAG, dl);
16578 return DCI.CombineTo(N, NewVec, TF, true);
16581 // If this is a vector EXT Load then attempt to optimize it using a
16582 // shuffle. If SSSE3 is not available we may emit an illegal shuffle but the
16583 // expansion is still better than scalar code.
16584 // We generate X86ISD::VSEXT for SEXTLOADs if it's available, otherwise we'll
16585 // emit a shuffle and a arithmetic shift.
16586 // TODO: It is possible to support ZExt by zeroing the undef values
16587 // during the shuffle phase or after the shuffle.
16588 if (RegVT.isVector() && RegVT.isInteger() && Subtarget->hasSSE2() &&
16589 (Ext == ISD::EXTLOAD || Ext == ISD::SEXTLOAD)) {
16590 assert(MemVT != RegVT && "Cannot extend to the same type");
16591 assert(MemVT.isVector() && "Must load a vector from memory");
16593 unsigned NumElems = RegVT.getVectorNumElements();
16594 unsigned MemSz = MemVT.getSizeInBits();
16595 assert(RegSz > MemSz && "Register size must be greater than the mem size");
16597 if (Ext == ISD::SEXTLOAD && RegSz == 256 && !Subtarget->hasInt256())
16600 // All sizes must be a power of two.
16601 if (!isPowerOf2_32(RegSz * MemSz * NumElems))
16604 // Attempt to load the original value using scalar loads.
16605 // Find the largest scalar type that divides the total loaded size.
16606 MVT SclrLoadTy = MVT::i8;
16607 for (unsigned tp = MVT::FIRST_INTEGER_VALUETYPE;
16608 tp < MVT::LAST_INTEGER_VALUETYPE; ++tp) {
16609 MVT Tp = (MVT::SimpleValueType)tp;
16610 if (TLI.isTypeLegal(Tp) && ((MemSz % Tp.getSizeInBits()) == 0)) {
16615 // On 32bit systems, we can't save 64bit integers. Try bitcasting to F64.
16616 if (TLI.isTypeLegal(MVT::f64) && SclrLoadTy.getSizeInBits() < 64 &&
16618 SclrLoadTy = MVT::f64;
16620 // Calculate the number of scalar loads that we need to perform
16621 // in order to load our vector from memory.
16622 unsigned NumLoads = MemSz / SclrLoadTy.getSizeInBits();
16623 if (Ext == ISD::SEXTLOAD && NumLoads > 1)
16626 unsigned loadRegZize = RegSz;
16627 if (Ext == ISD::SEXTLOAD && RegSz == 256)
16630 // Represent our vector as a sequence of elements which are the
16631 // largest scalar that we can load.
16632 EVT LoadUnitVecVT = EVT::getVectorVT(*DAG.getContext(), SclrLoadTy,
16633 loadRegZize/SclrLoadTy.getSizeInBits());
16635 // Represent the data using the same element type that is stored in
16636 // memory. In practice, we ''widen'' MemVT.
16638 EVT::getVectorVT(*DAG.getContext(), MemVT.getScalarType(),
16639 loadRegZize/MemVT.getScalarType().getSizeInBits());
16641 assert(WideVecVT.getSizeInBits() == LoadUnitVecVT.getSizeInBits() &&
16642 "Invalid vector type");
16644 // We can't shuffle using an illegal type.
16645 if (!TLI.isTypeLegal(WideVecVT))
16648 SmallVector<SDValue, 8> Chains;
16649 SDValue Ptr = Ld->getBasePtr();
16650 SDValue Increment = DAG.getConstant(SclrLoadTy.getSizeInBits()/8,
16651 TLI.getPointerTy());
16652 SDValue Res = DAG.getUNDEF(LoadUnitVecVT);
16654 for (unsigned i = 0; i < NumLoads; ++i) {
16655 // Perform a single load.
16656 SDValue ScalarLoad = DAG.getLoad(SclrLoadTy, dl, Ld->getChain(),
16657 Ptr, Ld->getPointerInfo(),
16658 Ld->isVolatile(), Ld->isNonTemporal(),
16659 Ld->isInvariant(), Ld->getAlignment());
16660 Chains.push_back(ScalarLoad.getValue(1));
16661 // Create the first element type using SCALAR_TO_VECTOR in order to avoid
16662 // another round of DAGCombining.
16664 Res = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, LoadUnitVecVT, ScalarLoad);
16666 Res = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, LoadUnitVecVT, Res,
16667 ScalarLoad, DAG.getIntPtrConstant(i));
16669 Ptr = DAG.getNode(ISD::ADD, dl, Ptr.getValueType(), Ptr, Increment);
16672 SDValue TF = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, &Chains[0],
16675 // Bitcast the loaded value to a vector of the original element type, in
16676 // the size of the target vector type.
16677 SDValue SlicedVec = DAG.getNode(ISD::BITCAST, dl, WideVecVT, Res);
16678 unsigned SizeRatio = RegSz/MemSz;
16680 if (Ext == ISD::SEXTLOAD) {
16681 // If we have SSE4.1 we can directly emit a VSEXT node.
16682 if (Subtarget->hasSSE41()) {
16683 SDValue Sext = DAG.getNode(X86ISD::VSEXT, dl, RegVT, SlicedVec);
16684 return DCI.CombineTo(N, Sext, TF, true);
16687 // Otherwise we'll shuffle the small elements in the high bits of the
16688 // larger type and perform an arithmetic shift. If the shift is not legal
16689 // it's better to scalarize.
16690 if (!TLI.isOperationLegalOrCustom(ISD::SRA, RegVT))
16693 // Redistribute the loaded elements into the different locations.
16694 SmallVector<int, 8> ShuffleVec(NumElems * SizeRatio, -1);
16695 for (unsigned i = 0; i != NumElems; ++i)
16696 ShuffleVec[i*SizeRatio + SizeRatio-1] = i;
16698 SDValue Shuff = DAG.getVectorShuffle(WideVecVT, dl, SlicedVec,
16699 DAG.getUNDEF(WideVecVT),
16702 Shuff = DAG.getNode(ISD::BITCAST, dl, RegVT, Shuff);
16704 // Build the arithmetic shift.
16705 unsigned Amt = RegVT.getVectorElementType().getSizeInBits() -
16706 MemVT.getVectorElementType().getSizeInBits();
16707 Shuff = DAG.getNode(ISD::SRA, dl, RegVT, Shuff,
16708 DAG.getConstant(Amt, RegVT));
16710 return DCI.CombineTo(N, Shuff, TF, true);
16713 // Redistribute the loaded elements into the different locations.
16714 SmallVector<int, 8> ShuffleVec(NumElems * SizeRatio, -1);
16715 for (unsigned i = 0; i != NumElems; ++i)
16716 ShuffleVec[i*SizeRatio] = i;
16718 SDValue Shuff = DAG.getVectorShuffle(WideVecVT, dl, SlicedVec,
16719 DAG.getUNDEF(WideVecVT),
16722 // Bitcast to the requested type.
16723 Shuff = DAG.getNode(ISD::BITCAST, dl, RegVT, Shuff);
16724 // Replace the original load with the new sequence
16725 // and return the new chain.
16726 return DCI.CombineTo(N, Shuff, TF, true);
16732 /// PerformSTORECombine - Do target-specific dag combines on STORE nodes.
16733 static SDValue PerformSTORECombine(SDNode *N, SelectionDAG &DAG,
16734 const X86Subtarget *Subtarget) {
16735 StoreSDNode *St = cast<StoreSDNode>(N);
16736 EVT VT = St->getValue().getValueType();
16737 EVT StVT = St->getMemoryVT();
16738 DebugLoc dl = St->getDebugLoc();
16739 SDValue StoredVal = St->getOperand(1);
16740 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
16741 unsigned Alignment = St->getAlignment();
16742 bool IsAligned = Alignment == 0 || Alignment == VT.getSizeInBits()/8;
16744 // If we are saving a concatenation of two XMM registers, perform two stores.
16745 // On Sandy Bridge, 256-bit memory operations are executed by two
16746 // 128-bit ports. However, on Haswell it is better to issue a single 256-bit
16747 // memory operation.
16748 if (VT.is256BitVector() && !Subtarget->hasInt256() &&
16749 StVT == VT && !IsAligned) {
16750 unsigned NumElems = VT.getVectorNumElements();
16754 SDValue Value0 = Extract128BitVector(StoredVal, 0, DAG, dl);
16755 SDValue Value1 = Extract128BitVector(StoredVal, NumElems/2, DAG, dl);
16757 SDValue Stride = DAG.getConstant(16, TLI.getPointerTy());
16758 SDValue Ptr0 = St->getBasePtr();
16759 SDValue Ptr1 = DAG.getNode(ISD::ADD, dl, Ptr0.getValueType(), Ptr0, Stride);
16761 SDValue Ch0 = DAG.getStore(St->getChain(), dl, Value0, Ptr0,
16762 St->getPointerInfo(), St->isVolatile(),
16763 St->isNonTemporal(), Alignment);
16764 SDValue Ch1 = DAG.getStore(St->getChain(), dl, Value1, Ptr1,
16765 St->getPointerInfo(), St->isVolatile(),
16766 St->isNonTemporal(),
16767 std::max(Alignment/2U, 1U));
16768 return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Ch0, Ch1);
16771 // Optimize trunc store (of multiple scalars) to shuffle and store.
16772 // First, pack all of the elements in one place. Next, store to memory
16773 // in fewer chunks.
16774 if (St->isTruncatingStore() && VT.isVector()) {
16775 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
16776 unsigned NumElems = VT.getVectorNumElements();
16777 assert(StVT != VT && "Cannot truncate to the same type");
16778 unsigned FromSz = VT.getVectorElementType().getSizeInBits();
16779 unsigned ToSz = StVT.getVectorElementType().getSizeInBits();
16781 // From, To sizes and ElemCount must be pow of two
16782 if (!isPowerOf2_32(NumElems * FromSz * ToSz)) return SDValue();
16783 // We are going to use the original vector elt for storing.
16784 // Accumulated smaller vector elements must be a multiple of the store size.
16785 if (0 != (NumElems * FromSz) % ToSz) return SDValue();
16787 unsigned SizeRatio = FromSz / ToSz;
16789 assert(SizeRatio * NumElems * ToSz == VT.getSizeInBits());
16791 // Create a type on which we perform the shuffle
16792 EVT WideVecVT = EVT::getVectorVT(*DAG.getContext(),
16793 StVT.getScalarType(), NumElems*SizeRatio);
16795 assert(WideVecVT.getSizeInBits() == VT.getSizeInBits());
16797 SDValue WideVec = DAG.getNode(ISD::BITCAST, dl, WideVecVT, St->getValue());
16798 SmallVector<int, 8> ShuffleVec(NumElems * SizeRatio, -1);
16799 for (unsigned i = 0; i != NumElems; ++i)
16800 ShuffleVec[i] = i * SizeRatio;
16802 // Can't shuffle using an illegal type.
16803 if (!TLI.isTypeLegal(WideVecVT))
16806 SDValue Shuff = DAG.getVectorShuffle(WideVecVT, dl, WideVec,
16807 DAG.getUNDEF(WideVecVT),
16809 // At this point all of the data is stored at the bottom of the
16810 // register. We now need to save it to mem.
16812 // Find the largest store unit
16813 MVT StoreType = MVT::i8;
16814 for (unsigned tp = MVT::FIRST_INTEGER_VALUETYPE;
16815 tp < MVT::LAST_INTEGER_VALUETYPE; ++tp) {
16816 MVT Tp = (MVT::SimpleValueType)tp;
16817 if (TLI.isTypeLegal(Tp) && Tp.getSizeInBits() <= NumElems * ToSz)
16821 // On 32bit systems, we can't save 64bit integers. Try bitcasting to F64.
16822 if (TLI.isTypeLegal(MVT::f64) && StoreType.getSizeInBits() < 64 &&
16823 (64 <= NumElems * ToSz))
16824 StoreType = MVT::f64;
16826 // Bitcast the original vector into a vector of store-size units
16827 EVT StoreVecVT = EVT::getVectorVT(*DAG.getContext(),
16828 StoreType, VT.getSizeInBits()/StoreType.getSizeInBits());
16829 assert(StoreVecVT.getSizeInBits() == VT.getSizeInBits());
16830 SDValue ShuffWide = DAG.getNode(ISD::BITCAST, dl, StoreVecVT, Shuff);
16831 SmallVector<SDValue, 8> Chains;
16832 SDValue Increment = DAG.getConstant(StoreType.getSizeInBits()/8,
16833 TLI.getPointerTy());
16834 SDValue Ptr = St->getBasePtr();
16836 // Perform one or more big stores into memory.
16837 for (unsigned i=0, e=(ToSz*NumElems)/StoreType.getSizeInBits(); i!=e; ++i) {
16838 SDValue SubVec = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl,
16839 StoreType, ShuffWide,
16840 DAG.getIntPtrConstant(i));
16841 SDValue Ch = DAG.getStore(St->getChain(), dl, SubVec, Ptr,
16842 St->getPointerInfo(), St->isVolatile(),
16843 St->isNonTemporal(), St->getAlignment());
16844 Ptr = DAG.getNode(ISD::ADD, dl, Ptr.getValueType(), Ptr, Increment);
16845 Chains.push_back(Ch);
16848 return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, &Chains[0],
16852 // Turn load->store of MMX types into GPR load/stores. This avoids clobbering
16853 // the FP state in cases where an emms may be missing.
16854 // A preferable solution to the general problem is to figure out the right
16855 // places to insert EMMS. This qualifies as a quick hack.
16857 // Similarly, turn load->store of i64 into double load/stores in 32-bit mode.
16858 if (VT.getSizeInBits() != 64)
16861 const Function *F = DAG.getMachineFunction().getFunction();
16862 bool NoImplicitFloatOps = F->getAttributes().
16863 hasAttribute(AttributeSet::FunctionIndex, Attribute::NoImplicitFloat);
16864 bool F64IsLegal = !DAG.getTarget().Options.UseSoftFloat && !NoImplicitFloatOps
16865 && Subtarget->hasSSE2();
16866 if ((VT.isVector() ||
16867 (VT == MVT::i64 && F64IsLegal && !Subtarget->is64Bit())) &&
16868 isa<LoadSDNode>(St->getValue()) &&
16869 !cast<LoadSDNode>(St->getValue())->isVolatile() &&
16870 St->getChain().hasOneUse() && !St->isVolatile()) {
16871 SDNode* LdVal = St->getValue().getNode();
16872 LoadSDNode *Ld = 0;
16873 int TokenFactorIndex = -1;
16874 SmallVector<SDValue, 8> Ops;
16875 SDNode* ChainVal = St->getChain().getNode();
16876 // Must be a store of a load. We currently handle two cases: the load
16877 // is a direct child, and it's under an intervening TokenFactor. It is
16878 // possible to dig deeper under nested TokenFactors.
16879 if (ChainVal == LdVal)
16880 Ld = cast<LoadSDNode>(St->getChain());
16881 else if (St->getValue().hasOneUse() &&
16882 ChainVal->getOpcode() == ISD::TokenFactor) {
16883 for (unsigned i = 0, e = ChainVal->getNumOperands(); i != e; ++i) {
16884 if (ChainVal->getOperand(i).getNode() == LdVal) {
16885 TokenFactorIndex = i;
16886 Ld = cast<LoadSDNode>(St->getValue());
16888 Ops.push_back(ChainVal->getOperand(i));
16892 if (!Ld || !ISD::isNormalLoad(Ld))
16895 // If this is not the MMX case, i.e. we are just turning i64 load/store
16896 // into f64 load/store, avoid the transformation if there are multiple
16897 // uses of the loaded value.
16898 if (!VT.isVector() && !Ld->hasNUsesOfValue(1, 0))
16901 DebugLoc LdDL = Ld->getDebugLoc();
16902 DebugLoc StDL = N->getDebugLoc();
16903 // If we are a 64-bit capable x86, lower to a single movq load/store pair.
16904 // Otherwise, if it's legal to use f64 SSE instructions, use f64 load/store
16906 if (Subtarget->is64Bit() || F64IsLegal) {
16907 EVT LdVT = Subtarget->is64Bit() ? MVT::i64 : MVT::f64;
16908 SDValue NewLd = DAG.getLoad(LdVT, LdDL, Ld->getChain(), Ld->getBasePtr(),
16909 Ld->getPointerInfo(), Ld->isVolatile(),
16910 Ld->isNonTemporal(), Ld->isInvariant(),
16911 Ld->getAlignment());
16912 SDValue NewChain = NewLd.getValue(1);
16913 if (TokenFactorIndex != -1) {
16914 Ops.push_back(NewChain);
16915 NewChain = DAG.getNode(ISD::TokenFactor, LdDL, MVT::Other, &Ops[0],
16918 return DAG.getStore(NewChain, StDL, NewLd, St->getBasePtr(),
16919 St->getPointerInfo(),
16920 St->isVolatile(), St->isNonTemporal(),
16921 St->getAlignment());
16924 // Otherwise, lower to two pairs of 32-bit loads / stores.
16925 SDValue LoAddr = Ld->getBasePtr();
16926 SDValue HiAddr = DAG.getNode(ISD::ADD, LdDL, MVT::i32, LoAddr,
16927 DAG.getConstant(4, MVT::i32));
16929 SDValue LoLd = DAG.getLoad(MVT::i32, LdDL, Ld->getChain(), LoAddr,
16930 Ld->getPointerInfo(),
16931 Ld->isVolatile(), Ld->isNonTemporal(),
16932 Ld->isInvariant(), Ld->getAlignment());
16933 SDValue HiLd = DAG.getLoad(MVT::i32, LdDL, Ld->getChain(), HiAddr,
16934 Ld->getPointerInfo().getWithOffset(4),
16935 Ld->isVolatile(), Ld->isNonTemporal(),
16937 MinAlign(Ld->getAlignment(), 4));
16939 SDValue NewChain = LoLd.getValue(1);
16940 if (TokenFactorIndex != -1) {
16941 Ops.push_back(LoLd);
16942 Ops.push_back(HiLd);
16943 NewChain = DAG.getNode(ISD::TokenFactor, LdDL, MVT::Other, &Ops[0],
16947 LoAddr = St->getBasePtr();
16948 HiAddr = DAG.getNode(ISD::ADD, StDL, MVT::i32, LoAddr,
16949 DAG.getConstant(4, MVT::i32));
16951 SDValue LoSt = DAG.getStore(NewChain, StDL, LoLd, LoAddr,
16952 St->getPointerInfo(),
16953 St->isVolatile(), St->isNonTemporal(),
16954 St->getAlignment());
16955 SDValue HiSt = DAG.getStore(NewChain, StDL, HiLd, HiAddr,
16956 St->getPointerInfo().getWithOffset(4),
16958 St->isNonTemporal(),
16959 MinAlign(St->getAlignment(), 4));
16960 return DAG.getNode(ISD::TokenFactor, StDL, MVT::Other, LoSt, HiSt);
16965 /// isHorizontalBinOp - Return 'true' if this vector operation is "horizontal"
16966 /// and return the operands for the horizontal operation in LHS and RHS. A
16967 /// horizontal operation performs the binary operation on successive elements
16968 /// of its first operand, then on successive elements of its second operand,
16969 /// returning the resulting values in a vector. For example, if
16970 /// A = < float a0, float a1, float a2, float a3 >
16972 /// B = < float b0, float b1, float b2, float b3 >
16973 /// then the result of doing a horizontal operation on A and B is
16974 /// A horizontal-op B = < a0 op a1, a2 op a3, b0 op b1, b2 op b3 >.
16975 /// In short, LHS and RHS are inspected to see if LHS op RHS is of the form
16976 /// A horizontal-op B, for some already available A and B, and if so then LHS is
16977 /// set to A, RHS to B, and the routine returns 'true'.
16978 /// Note that the binary operation should have the property that if one of the
16979 /// operands is UNDEF then the result is UNDEF.
16980 static bool isHorizontalBinOp(SDValue &LHS, SDValue &RHS, bool IsCommutative) {
16981 // Look for the following pattern: if
16982 // A = < float a0, float a1, float a2, float a3 >
16983 // B = < float b0, float b1, float b2, float b3 >
16985 // LHS = VECTOR_SHUFFLE A, B, <0, 2, 4, 6>
16986 // RHS = VECTOR_SHUFFLE A, B, <1, 3, 5, 7>
16987 // then LHS op RHS = < a0 op a1, a2 op a3, b0 op b1, b2 op b3 >
16988 // which is A horizontal-op B.
16990 // At least one of the operands should be a vector shuffle.
16991 if (LHS.getOpcode() != ISD::VECTOR_SHUFFLE &&
16992 RHS.getOpcode() != ISD::VECTOR_SHUFFLE)
16995 EVT VT = LHS.getValueType();
16997 assert((VT.is128BitVector() || VT.is256BitVector()) &&
16998 "Unsupported vector type for horizontal add/sub");
17000 // Handle 128 and 256-bit vector lengths. AVX defines horizontal add/sub to
17001 // operate independently on 128-bit lanes.
17002 unsigned NumElts = VT.getVectorNumElements();
17003 unsigned NumLanes = VT.getSizeInBits()/128;
17004 unsigned NumLaneElts = NumElts / NumLanes;
17005 assert((NumLaneElts % 2 == 0) &&
17006 "Vector type should have an even number of elements in each lane");
17007 unsigned HalfLaneElts = NumLaneElts/2;
17009 // View LHS in the form
17010 // LHS = VECTOR_SHUFFLE A, B, LMask
17011 // If LHS is not a shuffle then pretend it is the shuffle
17012 // LHS = VECTOR_SHUFFLE LHS, undef, <0, 1, ..., N-1>
17013 // NOTE: in what follows a default initialized SDValue represents an UNDEF of
17016 SmallVector<int, 16> LMask(NumElts);
17017 if (LHS.getOpcode() == ISD::VECTOR_SHUFFLE) {
17018 if (LHS.getOperand(0).getOpcode() != ISD::UNDEF)
17019 A = LHS.getOperand(0);
17020 if (LHS.getOperand(1).getOpcode() != ISD::UNDEF)
17021 B = LHS.getOperand(1);
17022 ArrayRef<int> Mask = cast<ShuffleVectorSDNode>(LHS.getNode())->getMask();
17023 std::copy(Mask.begin(), Mask.end(), LMask.begin());
17025 if (LHS.getOpcode() != ISD::UNDEF)
17027 for (unsigned i = 0; i != NumElts; ++i)
17031 // Likewise, view RHS in the form
17032 // RHS = VECTOR_SHUFFLE C, D, RMask
17034 SmallVector<int, 16> RMask(NumElts);
17035 if (RHS.getOpcode() == ISD::VECTOR_SHUFFLE) {
17036 if (RHS.getOperand(0).getOpcode() != ISD::UNDEF)
17037 C = RHS.getOperand(0);
17038 if (RHS.getOperand(1).getOpcode() != ISD::UNDEF)
17039 D = RHS.getOperand(1);
17040 ArrayRef<int> Mask = cast<ShuffleVectorSDNode>(RHS.getNode())->getMask();
17041 std::copy(Mask.begin(), Mask.end(), RMask.begin());
17043 if (RHS.getOpcode() != ISD::UNDEF)
17045 for (unsigned i = 0; i != NumElts; ++i)
17049 // Check that the shuffles are both shuffling the same vectors.
17050 if (!(A == C && B == D) && !(A == D && B == C))
17053 // If everything is UNDEF then bail out: it would be better to fold to UNDEF.
17054 if (!A.getNode() && !B.getNode())
17057 // If A and B occur in reverse order in RHS, then "swap" them (which means
17058 // rewriting the mask).
17060 CommuteVectorShuffleMask(RMask, NumElts);
17062 // At this point LHS and RHS are equivalent to
17063 // LHS = VECTOR_SHUFFLE A, B, LMask
17064 // RHS = VECTOR_SHUFFLE A, B, RMask
17065 // Check that the masks correspond to performing a horizontal operation.
17066 for (unsigned i = 0; i != NumElts; ++i) {
17067 int LIdx = LMask[i], RIdx = RMask[i];
17069 // Ignore any UNDEF components.
17070 if (LIdx < 0 || RIdx < 0 ||
17071 (!A.getNode() && (LIdx < (int)NumElts || RIdx < (int)NumElts)) ||
17072 (!B.getNode() && (LIdx >= (int)NumElts || RIdx >= (int)NumElts)))
17075 // Check that successive elements are being operated on. If not, this is
17076 // not a horizontal operation.
17077 unsigned Src = (i/HalfLaneElts) % 2; // each lane is split between srcs
17078 unsigned LaneStart = (i/NumLaneElts) * NumLaneElts;
17079 int Index = 2*(i%HalfLaneElts) + NumElts*Src + LaneStart;
17080 if (!(LIdx == Index && RIdx == Index + 1) &&
17081 !(IsCommutative && LIdx == Index + 1 && RIdx == Index))
17085 LHS = A.getNode() ? A : B; // If A is 'UNDEF', use B for it.
17086 RHS = B.getNode() ? B : A; // If B is 'UNDEF', use A for it.
17090 /// PerformFADDCombine - Do target-specific dag combines on floating point adds.
17091 static SDValue PerformFADDCombine(SDNode *N, SelectionDAG &DAG,
17092 const X86Subtarget *Subtarget) {
17093 EVT VT = N->getValueType(0);
17094 SDValue LHS = N->getOperand(0);
17095 SDValue RHS = N->getOperand(1);
17097 // Try to synthesize horizontal adds from adds of shuffles.
17098 if (((Subtarget->hasSSE3() && (VT == MVT::v4f32 || VT == MVT::v2f64)) ||
17099 (Subtarget->hasFp256() && (VT == MVT::v8f32 || VT == MVT::v4f64))) &&
17100 isHorizontalBinOp(LHS, RHS, true))
17101 return DAG.getNode(X86ISD::FHADD, N->getDebugLoc(), VT, LHS, RHS);
17105 /// PerformFSUBCombine - Do target-specific dag combines on floating point subs.
17106 static SDValue PerformFSUBCombine(SDNode *N, SelectionDAG &DAG,
17107 const X86Subtarget *Subtarget) {
17108 EVT VT = N->getValueType(0);
17109 SDValue LHS = N->getOperand(0);
17110 SDValue RHS = N->getOperand(1);
17112 // Try to synthesize horizontal subs from subs of shuffles.
17113 if (((Subtarget->hasSSE3() && (VT == MVT::v4f32 || VT == MVT::v2f64)) ||
17114 (Subtarget->hasFp256() && (VT == MVT::v8f32 || VT == MVT::v4f64))) &&
17115 isHorizontalBinOp(LHS, RHS, false))
17116 return DAG.getNode(X86ISD::FHSUB, N->getDebugLoc(), VT, LHS, RHS);
17120 /// PerformFORCombine - Do target-specific dag combines on X86ISD::FOR and
17121 /// X86ISD::FXOR nodes.
17122 static SDValue PerformFORCombine(SDNode *N, SelectionDAG &DAG) {
17123 assert(N->getOpcode() == X86ISD::FOR || N->getOpcode() == X86ISD::FXOR);
17124 // F[X]OR(0.0, x) -> x
17125 // F[X]OR(x, 0.0) -> x
17126 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(0)))
17127 if (C->getValueAPF().isPosZero())
17128 return N->getOperand(1);
17129 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(1)))
17130 if (C->getValueAPF().isPosZero())
17131 return N->getOperand(0);
17135 /// PerformFMinFMaxCombine - Do target-specific dag combines on X86ISD::FMIN and
17136 /// X86ISD::FMAX nodes.
17137 static SDValue PerformFMinFMaxCombine(SDNode *N, SelectionDAG &DAG) {
17138 assert(N->getOpcode() == X86ISD::FMIN || N->getOpcode() == X86ISD::FMAX);
17140 // Only perform optimizations if UnsafeMath is used.
17141 if (!DAG.getTarget().Options.UnsafeFPMath)
17144 // If we run in unsafe-math mode, then convert the FMAX and FMIN nodes
17145 // into FMINC and FMAXC, which are Commutative operations.
17146 unsigned NewOp = 0;
17147 switch (N->getOpcode()) {
17148 default: llvm_unreachable("unknown opcode");
17149 case X86ISD::FMIN: NewOp = X86ISD::FMINC; break;
17150 case X86ISD::FMAX: NewOp = X86ISD::FMAXC; break;
17153 return DAG.getNode(NewOp, N->getDebugLoc(), N->getValueType(0),
17154 N->getOperand(0), N->getOperand(1));
17157 /// PerformFANDCombine - Do target-specific dag combines on X86ISD::FAND nodes.
17158 static SDValue PerformFANDCombine(SDNode *N, SelectionDAG &DAG) {
17159 // FAND(0.0, x) -> 0.0
17160 // FAND(x, 0.0) -> 0.0
17161 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(0)))
17162 if (C->getValueAPF().isPosZero())
17163 return N->getOperand(0);
17164 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(1)))
17165 if (C->getValueAPF().isPosZero())
17166 return N->getOperand(1);
17170 static SDValue PerformBTCombine(SDNode *N,
17172 TargetLowering::DAGCombinerInfo &DCI) {
17173 // BT ignores high bits in the bit index operand.
17174 SDValue Op1 = N->getOperand(1);
17175 if (Op1.hasOneUse()) {
17176 unsigned BitWidth = Op1.getValueSizeInBits();
17177 APInt DemandedMask = APInt::getLowBitsSet(BitWidth, Log2_32(BitWidth));
17178 APInt KnownZero, KnownOne;
17179 TargetLowering::TargetLoweringOpt TLO(DAG, !DCI.isBeforeLegalize(),
17180 !DCI.isBeforeLegalizeOps());
17181 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
17182 if (TLO.ShrinkDemandedConstant(Op1, DemandedMask) ||
17183 TLI.SimplifyDemandedBits(Op1, DemandedMask, KnownZero, KnownOne, TLO))
17184 DCI.CommitTargetLoweringOpt(TLO);
17189 static SDValue PerformVZEXT_MOVLCombine(SDNode *N, SelectionDAG &DAG) {
17190 SDValue Op = N->getOperand(0);
17191 if (Op.getOpcode() == ISD::BITCAST)
17192 Op = Op.getOperand(0);
17193 EVT VT = N->getValueType(0), OpVT = Op.getValueType();
17194 if (Op.getOpcode() == X86ISD::VZEXT_LOAD &&
17195 VT.getVectorElementType().getSizeInBits() ==
17196 OpVT.getVectorElementType().getSizeInBits()) {
17197 return DAG.getNode(ISD::BITCAST, N->getDebugLoc(), VT, Op);
17202 static SDValue PerformSIGN_EXTEND_INREGCombine(SDNode *N, SelectionDAG &DAG,
17203 const X86Subtarget *Subtarget) {
17204 EVT VT = N->getValueType(0);
17205 if (!VT.isVector())
17208 SDValue N0 = N->getOperand(0);
17209 SDValue N1 = N->getOperand(1);
17210 EVT ExtraVT = cast<VTSDNode>(N1)->getVT();
17211 DebugLoc dl = N->getDebugLoc();
17213 // The SIGN_EXTEND_INREG to v4i64 is expensive operation on the
17214 // both SSE and AVX2 since there is no sign-extended shift right
17215 // operation on a vector with 64-bit elements.
17216 //(sext_in_reg (v4i64 anyext (v4i32 x )), ExtraVT) ->
17217 // (v4i64 sext (v4i32 sext_in_reg (v4i32 x , ExtraVT)))
17218 if (VT == MVT::v4i64 && (N0.getOpcode() == ISD::ANY_EXTEND ||
17219 N0.getOpcode() == ISD::SIGN_EXTEND)) {
17220 SDValue N00 = N0.getOperand(0);
17222 // EXTLOAD has a better solution on AVX2,
17223 // it may be replaced with X86ISD::VSEXT node.
17224 if (N00.getOpcode() == ISD::LOAD && Subtarget->hasInt256())
17225 if (!ISD::isNormalLoad(N00.getNode()))
17228 if (N00.getValueType() == MVT::v4i32 && ExtraVT.getSizeInBits() < 128) {
17229 SDValue Tmp = DAG.getNode(ISD::SIGN_EXTEND_INREG, dl, MVT::v4i32,
17231 return DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v4i64, Tmp);
17237 static SDValue PerformSExtCombine(SDNode *N, SelectionDAG &DAG,
17238 TargetLowering::DAGCombinerInfo &DCI,
17239 const X86Subtarget *Subtarget) {
17240 if (!DCI.isBeforeLegalizeOps())
17243 if (!Subtarget->hasFp256())
17246 EVT VT = N->getValueType(0);
17247 if (VT.isVector() && VT.getSizeInBits() == 256) {
17248 SDValue R = WidenMaskArithmetic(N, DAG, DCI, Subtarget);
17256 static SDValue PerformFMACombine(SDNode *N, SelectionDAG &DAG,
17257 const X86Subtarget* Subtarget) {
17258 DebugLoc dl = N->getDebugLoc();
17259 EVT VT = N->getValueType(0);
17261 // Let legalize expand this if it isn't a legal type yet.
17262 if (!DAG.getTargetLoweringInfo().isTypeLegal(VT))
17265 EVT ScalarVT = VT.getScalarType();
17266 if ((ScalarVT != MVT::f32 && ScalarVT != MVT::f64) ||
17267 (!Subtarget->hasFMA() && !Subtarget->hasFMA4()))
17270 SDValue A = N->getOperand(0);
17271 SDValue B = N->getOperand(1);
17272 SDValue C = N->getOperand(2);
17274 bool NegA = (A.getOpcode() == ISD::FNEG);
17275 bool NegB = (B.getOpcode() == ISD::FNEG);
17276 bool NegC = (C.getOpcode() == ISD::FNEG);
17278 // Negative multiplication when NegA xor NegB
17279 bool NegMul = (NegA != NegB);
17281 A = A.getOperand(0);
17283 B = B.getOperand(0);
17285 C = C.getOperand(0);
17289 Opcode = (!NegC) ? X86ISD::FMADD : X86ISD::FMSUB;
17291 Opcode = (!NegC) ? X86ISD::FNMADD : X86ISD::FNMSUB;
17293 return DAG.getNode(Opcode, dl, VT, A, B, C);
17296 static SDValue PerformZExtCombine(SDNode *N, SelectionDAG &DAG,
17297 TargetLowering::DAGCombinerInfo &DCI,
17298 const X86Subtarget *Subtarget) {
17299 // (i32 zext (and (i8 x86isd::setcc_carry), 1)) ->
17300 // (and (i32 x86isd::setcc_carry), 1)
17301 // This eliminates the zext. This transformation is necessary because
17302 // ISD::SETCC is always legalized to i8.
17303 DebugLoc dl = N->getDebugLoc();
17304 SDValue N0 = N->getOperand(0);
17305 EVT VT = N->getValueType(0);
17307 if (N0.getOpcode() == ISD::AND &&
17309 N0.getOperand(0).hasOneUse()) {
17310 SDValue N00 = N0.getOperand(0);
17311 if (N00.getOpcode() == X86ISD::SETCC_CARRY) {
17312 ConstantSDNode *C = dyn_cast<ConstantSDNode>(N0.getOperand(1));
17313 if (!C || C->getZExtValue() != 1)
17315 return DAG.getNode(ISD::AND, dl, VT,
17316 DAG.getNode(X86ISD::SETCC_CARRY, dl, VT,
17317 N00.getOperand(0), N00.getOperand(1)),
17318 DAG.getConstant(1, VT));
17322 if (VT.is256BitVector()) {
17323 SDValue R = WidenMaskArithmetic(N, DAG, DCI, Subtarget);
17331 // Optimize x == -y --> x+y == 0
17332 // x != -y --> x+y != 0
17333 static SDValue PerformISDSETCCCombine(SDNode *N, SelectionDAG &DAG) {
17334 ISD::CondCode CC = cast<CondCodeSDNode>(N->getOperand(2))->get();
17335 SDValue LHS = N->getOperand(0);
17336 SDValue RHS = N->getOperand(1);
17338 if ((CC == ISD::SETNE || CC == ISD::SETEQ) && LHS.getOpcode() == ISD::SUB)
17339 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(LHS.getOperand(0)))
17340 if (C->getAPIntValue() == 0 && LHS.hasOneUse()) {
17341 SDValue addV = DAG.getNode(ISD::ADD, N->getDebugLoc(),
17342 LHS.getValueType(), RHS, LHS.getOperand(1));
17343 return DAG.getSetCC(N->getDebugLoc(), N->getValueType(0),
17344 addV, DAG.getConstant(0, addV.getValueType()), CC);
17346 if ((CC == ISD::SETNE || CC == ISD::SETEQ) && RHS.getOpcode() == ISD::SUB)
17347 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(RHS.getOperand(0)))
17348 if (C->getAPIntValue() == 0 && RHS.hasOneUse()) {
17349 SDValue addV = DAG.getNode(ISD::ADD, N->getDebugLoc(),
17350 RHS.getValueType(), LHS, RHS.getOperand(1));
17351 return DAG.getSetCC(N->getDebugLoc(), N->getValueType(0),
17352 addV, DAG.getConstant(0, addV.getValueType()), CC);
17357 // Helper function of PerformSETCCCombine. It is to materialize "setb reg"
17358 // as "sbb reg,reg", since it can be extended without zext and produces
17359 // an all-ones bit which is more useful than 0/1 in some cases.
17360 static SDValue MaterializeSETB(DebugLoc DL, SDValue EFLAGS, SelectionDAG &DAG) {
17361 return DAG.getNode(ISD::AND, DL, MVT::i8,
17362 DAG.getNode(X86ISD::SETCC_CARRY, DL, MVT::i8,
17363 DAG.getConstant(X86::COND_B, MVT::i8), EFLAGS),
17364 DAG.getConstant(1, MVT::i8));
17367 // Optimize RES = X86ISD::SETCC CONDCODE, EFLAG_INPUT
17368 static SDValue PerformSETCCCombine(SDNode *N, SelectionDAG &DAG,
17369 TargetLowering::DAGCombinerInfo &DCI,
17370 const X86Subtarget *Subtarget) {
17371 DebugLoc DL = N->getDebugLoc();
17372 X86::CondCode CC = X86::CondCode(N->getConstantOperandVal(0));
17373 SDValue EFLAGS = N->getOperand(1);
17375 if (CC == X86::COND_A) {
17376 // Try to convert COND_A into COND_B in an attempt to facilitate
17377 // materializing "setb reg".
17379 // Do not flip "e > c", where "c" is a constant, because Cmp instruction
17380 // cannot take an immediate as its first operand.
17382 if (EFLAGS.getOpcode() == X86ISD::SUB && EFLAGS.hasOneUse() &&
17383 EFLAGS.getValueType().isInteger() &&
17384 !isa<ConstantSDNode>(EFLAGS.getOperand(1))) {
17385 SDValue NewSub = DAG.getNode(X86ISD::SUB, EFLAGS.getDebugLoc(),
17386 EFLAGS.getNode()->getVTList(),
17387 EFLAGS.getOperand(1), EFLAGS.getOperand(0));
17388 SDValue NewEFLAGS = SDValue(NewSub.getNode(), EFLAGS.getResNo());
17389 return MaterializeSETB(DL, NewEFLAGS, DAG);
17393 // Materialize "setb reg" as "sbb reg,reg", since it can be extended without
17394 // a zext and produces an all-ones bit which is more useful than 0/1 in some
17396 if (CC == X86::COND_B)
17397 return MaterializeSETB(DL, EFLAGS, DAG);
17401 Flags = checkBoolTestSetCCCombine(EFLAGS, CC);
17402 if (Flags.getNode()) {
17403 SDValue Cond = DAG.getConstant(CC, MVT::i8);
17404 return DAG.getNode(X86ISD::SETCC, DL, N->getVTList(), Cond, Flags);
17410 // Optimize branch condition evaluation.
17412 static SDValue PerformBrCondCombine(SDNode *N, SelectionDAG &DAG,
17413 TargetLowering::DAGCombinerInfo &DCI,
17414 const X86Subtarget *Subtarget) {
17415 DebugLoc DL = N->getDebugLoc();
17416 SDValue Chain = N->getOperand(0);
17417 SDValue Dest = N->getOperand(1);
17418 SDValue EFLAGS = N->getOperand(3);
17419 X86::CondCode CC = X86::CondCode(N->getConstantOperandVal(2));
17423 Flags = checkBoolTestSetCCCombine(EFLAGS, CC);
17424 if (Flags.getNode()) {
17425 SDValue Cond = DAG.getConstant(CC, MVT::i8);
17426 return DAG.getNode(X86ISD::BRCOND, DL, N->getVTList(), Chain, Dest, Cond,
17433 static SDValue PerformSINT_TO_FPCombine(SDNode *N, SelectionDAG &DAG,
17434 const X86TargetLowering *XTLI) {
17435 SDValue Op0 = N->getOperand(0);
17436 EVT InVT = Op0->getValueType(0);
17438 // SINT_TO_FP(v4i8) -> SINT_TO_FP(SEXT(v4i8 to v4i32))
17439 if (InVT == MVT::v8i8 || InVT == MVT::v4i8) {
17440 DebugLoc dl = N->getDebugLoc();
17441 MVT DstVT = InVT == MVT::v4i8 ? MVT::v4i32 : MVT::v8i32;
17442 SDValue P = DAG.getNode(ISD::SIGN_EXTEND, dl, DstVT, Op0);
17443 return DAG.getNode(ISD::SINT_TO_FP, dl, N->getValueType(0), P);
17446 // Transform (SINT_TO_FP (i64 ...)) into an x87 operation if we have
17447 // a 32-bit target where SSE doesn't support i64->FP operations.
17448 if (Op0.getOpcode() == ISD::LOAD) {
17449 LoadSDNode *Ld = cast<LoadSDNode>(Op0.getNode());
17450 EVT VT = Ld->getValueType(0);
17451 if (!Ld->isVolatile() && !N->getValueType(0).isVector() &&
17452 ISD::isNON_EXTLoad(Op0.getNode()) && Op0.hasOneUse() &&
17453 !XTLI->getSubtarget()->is64Bit() &&
17454 !DAG.getTargetLoweringInfo().isTypeLegal(VT)) {
17455 SDValue FILDChain = XTLI->BuildFILD(SDValue(N, 0), Ld->getValueType(0),
17456 Ld->getChain(), Op0, DAG);
17457 DAG.ReplaceAllUsesOfValueWith(Op0.getValue(1), FILDChain.getValue(1));
17464 // Optimize RES, EFLAGS = X86ISD::ADC LHS, RHS, EFLAGS
17465 static SDValue PerformADCCombine(SDNode *N, SelectionDAG &DAG,
17466 X86TargetLowering::DAGCombinerInfo &DCI) {
17467 // If the LHS and RHS of the ADC node are zero, then it can't overflow and
17468 // the result is either zero or one (depending on the input carry bit).
17469 // Strength reduce this down to a "set on carry" aka SETCC_CARRY&1.
17470 if (X86::isZeroNode(N->getOperand(0)) &&
17471 X86::isZeroNode(N->getOperand(1)) &&
17472 // We don't have a good way to replace an EFLAGS use, so only do this when
17474 SDValue(N, 1).use_empty()) {
17475 DebugLoc DL = N->getDebugLoc();
17476 EVT VT = N->getValueType(0);
17477 SDValue CarryOut = DAG.getConstant(0, N->getValueType(1));
17478 SDValue Res1 = DAG.getNode(ISD::AND, DL, VT,
17479 DAG.getNode(X86ISD::SETCC_CARRY, DL, VT,
17480 DAG.getConstant(X86::COND_B,MVT::i8),
17482 DAG.getConstant(1, VT));
17483 return DCI.CombineTo(N, Res1, CarryOut);
17489 // fold (add Y, (sete X, 0)) -> adc 0, Y
17490 // (add Y, (setne X, 0)) -> sbb -1, Y
17491 // (sub (sete X, 0), Y) -> sbb 0, Y
17492 // (sub (setne X, 0), Y) -> adc -1, Y
17493 static SDValue OptimizeConditionalInDecrement(SDNode *N, SelectionDAG &DAG) {
17494 DebugLoc DL = N->getDebugLoc();
17496 // Look through ZExts.
17497 SDValue Ext = N->getOperand(N->getOpcode() == ISD::SUB ? 1 : 0);
17498 if (Ext.getOpcode() != ISD::ZERO_EXTEND || !Ext.hasOneUse())
17501 SDValue SetCC = Ext.getOperand(0);
17502 if (SetCC.getOpcode() != X86ISD::SETCC || !SetCC.hasOneUse())
17505 X86::CondCode CC = (X86::CondCode)SetCC.getConstantOperandVal(0);
17506 if (CC != X86::COND_E && CC != X86::COND_NE)
17509 SDValue Cmp = SetCC.getOperand(1);
17510 if (Cmp.getOpcode() != X86ISD::CMP || !Cmp.hasOneUse() ||
17511 !X86::isZeroNode(Cmp.getOperand(1)) ||
17512 !Cmp.getOperand(0).getValueType().isInteger())
17515 SDValue CmpOp0 = Cmp.getOperand(0);
17516 SDValue NewCmp = DAG.getNode(X86ISD::CMP, DL, MVT::i32, CmpOp0,
17517 DAG.getConstant(1, CmpOp0.getValueType()));
17519 SDValue OtherVal = N->getOperand(N->getOpcode() == ISD::SUB ? 0 : 1);
17520 if (CC == X86::COND_NE)
17521 return DAG.getNode(N->getOpcode() == ISD::SUB ? X86ISD::ADC : X86ISD::SBB,
17522 DL, OtherVal.getValueType(), OtherVal,
17523 DAG.getConstant(-1ULL, OtherVal.getValueType()), NewCmp);
17524 return DAG.getNode(N->getOpcode() == ISD::SUB ? X86ISD::SBB : X86ISD::ADC,
17525 DL, OtherVal.getValueType(), OtherVal,
17526 DAG.getConstant(0, OtherVal.getValueType()), NewCmp);
17529 /// PerformADDCombine - Do target-specific dag combines on integer adds.
17530 static SDValue PerformAddCombine(SDNode *N, SelectionDAG &DAG,
17531 const X86Subtarget *Subtarget) {
17532 EVT VT = N->getValueType(0);
17533 SDValue Op0 = N->getOperand(0);
17534 SDValue Op1 = N->getOperand(1);
17536 // Try to synthesize horizontal adds from adds of shuffles.
17537 if (((Subtarget->hasSSSE3() && (VT == MVT::v8i16 || VT == MVT::v4i32)) ||
17538 (Subtarget->hasInt256() && (VT == MVT::v16i16 || VT == MVT::v8i32))) &&
17539 isHorizontalBinOp(Op0, Op1, true))
17540 return DAG.getNode(X86ISD::HADD, N->getDebugLoc(), VT, Op0, Op1);
17542 return OptimizeConditionalInDecrement(N, DAG);
17545 static SDValue PerformSubCombine(SDNode *N, SelectionDAG &DAG,
17546 const X86Subtarget *Subtarget) {
17547 SDValue Op0 = N->getOperand(0);
17548 SDValue Op1 = N->getOperand(1);
17550 // X86 can't encode an immediate LHS of a sub. See if we can push the
17551 // negation into a preceding instruction.
17552 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op0)) {
17553 // If the RHS of the sub is a XOR with one use and a constant, invert the
17554 // immediate. Then add one to the LHS of the sub so we can turn
17555 // X-Y -> X+~Y+1, saving one register.
17556 if (Op1->hasOneUse() && Op1.getOpcode() == ISD::XOR &&
17557 isa<ConstantSDNode>(Op1.getOperand(1))) {
17558 APInt XorC = cast<ConstantSDNode>(Op1.getOperand(1))->getAPIntValue();
17559 EVT VT = Op0.getValueType();
17560 SDValue NewXor = DAG.getNode(ISD::XOR, Op1.getDebugLoc(), VT,
17562 DAG.getConstant(~XorC, VT));
17563 return DAG.getNode(ISD::ADD, N->getDebugLoc(), VT, NewXor,
17564 DAG.getConstant(C->getAPIntValue()+1, VT));
17568 // Try to synthesize horizontal adds from adds of shuffles.
17569 EVT VT = N->getValueType(0);
17570 if (((Subtarget->hasSSSE3() && (VT == MVT::v8i16 || VT == MVT::v4i32)) ||
17571 (Subtarget->hasInt256() && (VT == MVT::v16i16 || VT == MVT::v8i32))) &&
17572 isHorizontalBinOp(Op0, Op1, true))
17573 return DAG.getNode(X86ISD::HSUB, N->getDebugLoc(), VT, Op0, Op1);
17575 return OptimizeConditionalInDecrement(N, DAG);
17578 /// performVZEXTCombine - Performs build vector combines
17579 static SDValue performVZEXTCombine(SDNode *N, SelectionDAG &DAG,
17580 TargetLowering::DAGCombinerInfo &DCI,
17581 const X86Subtarget *Subtarget) {
17582 // (vzext (bitcast (vzext (x)) -> (vzext x)
17583 SDValue In = N->getOperand(0);
17584 while (In.getOpcode() == ISD::BITCAST)
17585 In = In.getOperand(0);
17587 if (In.getOpcode() != X86ISD::VZEXT)
17590 return DAG.getNode(X86ISD::VZEXT, N->getDebugLoc(), N->getValueType(0),
17594 SDValue X86TargetLowering::PerformDAGCombine(SDNode *N,
17595 DAGCombinerInfo &DCI) const {
17596 SelectionDAG &DAG = DCI.DAG;
17597 switch (N->getOpcode()) {
17599 case ISD::EXTRACT_VECTOR_ELT:
17600 return PerformEXTRACT_VECTOR_ELTCombine(N, DAG, DCI);
17602 case ISD::SELECT: return PerformSELECTCombine(N, DAG, DCI, Subtarget);
17603 case X86ISD::CMOV: return PerformCMOVCombine(N, DAG, DCI, Subtarget);
17604 case ISD::ADD: return PerformAddCombine(N, DAG, Subtarget);
17605 case ISD::SUB: return PerformSubCombine(N, DAG, Subtarget);
17606 case X86ISD::ADC: return PerformADCCombine(N, DAG, DCI);
17607 case ISD::MUL: return PerformMulCombine(N, DAG, DCI);
17610 case ISD::SRL: return PerformShiftCombine(N, DAG, DCI, Subtarget);
17611 case ISD::AND: return PerformAndCombine(N, DAG, DCI, Subtarget);
17612 case ISD::OR: return PerformOrCombine(N, DAG, DCI, Subtarget);
17613 case ISD::XOR: return PerformXorCombine(N, DAG, DCI, Subtarget);
17614 case ISD::LOAD: return PerformLOADCombine(N, DAG, DCI, Subtarget);
17615 case ISD::STORE: return PerformSTORECombine(N, DAG, Subtarget);
17616 case ISD::SINT_TO_FP: return PerformSINT_TO_FPCombine(N, DAG, this);
17617 case ISD::FADD: return PerformFADDCombine(N, DAG, Subtarget);
17618 case ISD::FSUB: return PerformFSUBCombine(N, DAG, Subtarget);
17620 case X86ISD::FOR: return PerformFORCombine(N, DAG);
17622 case X86ISD::FMAX: return PerformFMinFMaxCombine(N, DAG);
17623 case X86ISD::FAND: return PerformFANDCombine(N, DAG);
17624 case X86ISD::BT: return PerformBTCombine(N, DAG, DCI);
17625 case X86ISD::VZEXT_MOVL: return PerformVZEXT_MOVLCombine(N, DAG);
17626 case ISD::ANY_EXTEND:
17627 case ISD::ZERO_EXTEND: return PerformZExtCombine(N, DAG, DCI, Subtarget);
17628 case ISD::SIGN_EXTEND: return PerformSExtCombine(N, DAG, DCI, Subtarget);
17629 case ISD::SIGN_EXTEND_INREG: return PerformSIGN_EXTEND_INREGCombine(N, DAG, Subtarget);
17630 case ISD::TRUNCATE: return PerformTruncateCombine(N, DAG,DCI,Subtarget);
17631 case ISD::SETCC: return PerformISDSETCCCombine(N, DAG);
17632 case X86ISD::SETCC: return PerformSETCCCombine(N, DAG, DCI, Subtarget);
17633 case X86ISD::BRCOND: return PerformBrCondCombine(N, DAG, DCI, Subtarget);
17634 case X86ISD::VZEXT: return performVZEXTCombine(N, DAG, DCI, Subtarget);
17635 case X86ISD::SHUFP: // Handle all target specific shuffles
17636 case X86ISD::PALIGNR:
17637 case X86ISD::UNPCKH:
17638 case X86ISD::UNPCKL:
17639 case X86ISD::MOVHLPS:
17640 case X86ISD::MOVLHPS:
17641 case X86ISD::PSHUFD:
17642 case X86ISD::PSHUFHW:
17643 case X86ISD::PSHUFLW:
17644 case X86ISD::MOVSS:
17645 case X86ISD::MOVSD:
17646 case X86ISD::VPERMILP:
17647 case X86ISD::VPERM2X128:
17648 case ISD::VECTOR_SHUFFLE: return PerformShuffleCombine(N, DAG, DCI,Subtarget);
17649 case ISD::FMA: return PerformFMACombine(N, DAG, Subtarget);
17655 /// isTypeDesirableForOp - Return true if the target has native support for
17656 /// the specified value type and it is 'desirable' to use the type for the
17657 /// given node type. e.g. On x86 i16 is legal, but undesirable since i16
17658 /// instruction encodings are longer and some i16 instructions are slow.
17659 bool X86TargetLowering::isTypeDesirableForOp(unsigned Opc, EVT VT) const {
17660 if (!isTypeLegal(VT))
17662 if (VT != MVT::i16)
17669 case ISD::SIGN_EXTEND:
17670 case ISD::ZERO_EXTEND:
17671 case ISD::ANY_EXTEND:
17684 /// IsDesirableToPromoteOp - This method query the target whether it is
17685 /// beneficial for dag combiner to promote the specified node. If true, it
17686 /// should return the desired promotion type by reference.
17687 bool X86TargetLowering::IsDesirableToPromoteOp(SDValue Op, EVT &PVT) const {
17688 EVT VT = Op.getValueType();
17689 if (VT != MVT::i16)
17692 bool Promote = false;
17693 bool Commute = false;
17694 switch (Op.getOpcode()) {
17697 LoadSDNode *LD = cast<LoadSDNode>(Op);
17698 // If the non-extending load has a single use and it's not live out, then it
17699 // might be folded.
17700 if (LD->getExtensionType() == ISD::NON_EXTLOAD /*&&
17701 Op.hasOneUse()*/) {
17702 for (SDNode::use_iterator UI = Op.getNode()->use_begin(),
17703 UE = Op.getNode()->use_end(); UI != UE; ++UI) {
17704 // The only case where we'd want to promote LOAD (rather then it being
17705 // promoted as an operand is when it's only use is liveout.
17706 if (UI->getOpcode() != ISD::CopyToReg)
17713 case ISD::SIGN_EXTEND:
17714 case ISD::ZERO_EXTEND:
17715 case ISD::ANY_EXTEND:
17720 SDValue N0 = Op.getOperand(0);
17721 // Look out for (store (shl (load), x)).
17722 if (MayFoldLoad(N0) && MayFoldIntoStore(Op))
17735 SDValue N0 = Op.getOperand(0);
17736 SDValue N1 = Op.getOperand(1);
17737 if (!Commute && MayFoldLoad(N1))
17739 // Avoid disabling potential load folding opportunities.
17740 if (MayFoldLoad(N0) && (!isa<ConstantSDNode>(N1) || MayFoldIntoStore(Op)))
17742 if (MayFoldLoad(N1) && (!isa<ConstantSDNode>(N0) || MayFoldIntoStore(Op)))
17752 //===----------------------------------------------------------------------===//
17753 // X86 Inline Assembly Support
17754 //===----------------------------------------------------------------------===//
17757 // Helper to match a string separated by whitespace.
17758 bool matchAsmImpl(StringRef s, ArrayRef<const StringRef *> args) {
17759 s = s.substr(s.find_first_not_of(" \t")); // Skip leading whitespace.
17761 for (unsigned i = 0, e = args.size(); i != e; ++i) {
17762 StringRef piece(*args[i]);
17763 if (!s.startswith(piece)) // Check if the piece matches.
17766 s = s.substr(piece.size());
17767 StringRef::size_type pos = s.find_first_not_of(" \t");
17768 if (pos == 0) // We matched a prefix.
17776 const VariadicFunction1<bool, StringRef, StringRef, matchAsmImpl> matchAsm={};
17779 bool X86TargetLowering::ExpandInlineAsm(CallInst *CI) const {
17780 InlineAsm *IA = cast<InlineAsm>(CI->getCalledValue());
17782 std::string AsmStr = IA->getAsmString();
17784 IntegerType *Ty = dyn_cast<IntegerType>(CI->getType());
17785 if (!Ty || Ty->getBitWidth() % 16 != 0)
17788 // TODO: should remove alternatives from the asmstring: "foo {a|b}" -> "foo a"
17789 SmallVector<StringRef, 4> AsmPieces;
17790 SplitString(AsmStr, AsmPieces, ";\n");
17792 switch (AsmPieces.size()) {
17793 default: return false;
17795 // FIXME: this should verify that we are targeting a 486 or better. If not,
17796 // we will turn this bswap into something that will be lowered to logical
17797 // ops instead of emitting the bswap asm. For now, we don't support 486 or
17798 // lower so don't worry about this.
17800 if (matchAsm(AsmPieces[0], "bswap", "$0") ||
17801 matchAsm(AsmPieces[0], "bswapl", "$0") ||
17802 matchAsm(AsmPieces[0], "bswapq", "$0") ||
17803 matchAsm(AsmPieces[0], "bswap", "${0:q}") ||
17804 matchAsm(AsmPieces[0], "bswapl", "${0:q}") ||
17805 matchAsm(AsmPieces[0], "bswapq", "${0:q}")) {
17806 // No need to check constraints, nothing other than the equivalent of
17807 // "=r,0" would be valid here.
17808 return IntrinsicLowering::LowerToByteSwap(CI);
17811 // rorw $$8, ${0:w} --> llvm.bswap.i16
17812 if (CI->getType()->isIntegerTy(16) &&
17813 IA->getConstraintString().compare(0, 5, "=r,0,") == 0 &&
17814 (matchAsm(AsmPieces[0], "rorw", "$$8,", "${0:w}") ||
17815 matchAsm(AsmPieces[0], "rolw", "$$8,", "${0:w}"))) {
17817 const std::string &ConstraintsStr = IA->getConstraintString();
17818 SplitString(StringRef(ConstraintsStr).substr(5), AsmPieces, ",");
17819 array_pod_sort(AsmPieces.begin(), AsmPieces.end());
17820 if (AsmPieces.size() == 4 &&
17821 AsmPieces[0] == "~{cc}" &&
17822 AsmPieces[1] == "~{dirflag}" &&
17823 AsmPieces[2] == "~{flags}" &&
17824 AsmPieces[3] == "~{fpsr}")
17825 return IntrinsicLowering::LowerToByteSwap(CI);
17829 if (CI->getType()->isIntegerTy(32) &&
17830 IA->getConstraintString().compare(0, 5, "=r,0,") == 0 &&
17831 matchAsm(AsmPieces[0], "rorw", "$$8,", "${0:w}") &&
17832 matchAsm(AsmPieces[1], "rorl", "$$16,", "$0") &&
17833 matchAsm(AsmPieces[2], "rorw", "$$8,", "${0:w}")) {
17835 const std::string &ConstraintsStr = IA->getConstraintString();
17836 SplitString(StringRef(ConstraintsStr).substr(5), AsmPieces, ",");
17837 array_pod_sort(AsmPieces.begin(), AsmPieces.end());
17838 if (AsmPieces.size() == 4 &&
17839 AsmPieces[0] == "~{cc}" &&
17840 AsmPieces[1] == "~{dirflag}" &&
17841 AsmPieces[2] == "~{flags}" &&
17842 AsmPieces[3] == "~{fpsr}")
17843 return IntrinsicLowering::LowerToByteSwap(CI);
17846 if (CI->getType()->isIntegerTy(64)) {
17847 InlineAsm::ConstraintInfoVector Constraints = IA->ParseConstraints();
17848 if (Constraints.size() >= 2 &&
17849 Constraints[0].Codes.size() == 1 && Constraints[0].Codes[0] == "A" &&
17850 Constraints[1].Codes.size() == 1 && Constraints[1].Codes[0] == "0") {
17851 // bswap %eax / bswap %edx / xchgl %eax, %edx -> llvm.bswap.i64
17852 if (matchAsm(AsmPieces[0], "bswap", "%eax") &&
17853 matchAsm(AsmPieces[1], "bswap", "%edx") &&
17854 matchAsm(AsmPieces[2], "xchgl", "%eax,", "%edx"))
17855 return IntrinsicLowering::LowerToByteSwap(CI);
17863 /// getConstraintType - Given a constraint letter, return the type of
17864 /// constraint it is for this target.
17865 X86TargetLowering::ConstraintType
17866 X86TargetLowering::getConstraintType(const std::string &Constraint) const {
17867 if (Constraint.size() == 1) {
17868 switch (Constraint[0]) {
17879 return C_RegisterClass;
17903 return TargetLowering::getConstraintType(Constraint);
17906 /// Examine constraint type and operand type and determine a weight value.
17907 /// This object must already have been set up with the operand type
17908 /// and the current alternative constraint selected.
17909 TargetLowering::ConstraintWeight
17910 X86TargetLowering::getSingleConstraintMatchWeight(
17911 AsmOperandInfo &info, const char *constraint) const {
17912 ConstraintWeight weight = CW_Invalid;
17913 Value *CallOperandVal = info.CallOperandVal;
17914 // If we don't have a value, we can't do a match,
17915 // but allow it at the lowest weight.
17916 if (CallOperandVal == NULL)
17918 Type *type = CallOperandVal->getType();
17919 // Look at the constraint type.
17920 switch (*constraint) {
17922 weight = TargetLowering::getSingleConstraintMatchWeight(info, constraint);
17933 if (CallOperandVal->getType()->isIntegerTy())
17934 weight = CW_SpecificReg;
17939 if (type->isFloatingPointTy())
17940 weight = CW_SpecificReg;
17943 if (type->isX86_MMXTy() && Subtarget->hasMMX())
17944 weight = CW_SpecificReg;
17948 if (((type->getPrimitiveSizeInBits() == 128) && Subtarget->hasSSE1()) ||
17949 ((type->getPrimitiveSizeInBits() == 256) && Subtarget->hasFp256()))
17950 weight = CW_Register;
17953 if (ConstantInt *C = dyn_cast<ConstantInt>(info.CallOperandVal)) {
17954 if (C->getZExtValue() <= 31)
17955 weight = CW_Constant;
17959 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
17960 if (C->getZExtValue() <= 63)
17961 weight = CW_Constant;
17965 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
17966 if ((C->getSExtValue() >= -0x80) && (C->getSExtValue() <= 0x7f))
17967 weight = CW_Constant;
17971 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
17972 if ((C->getZExtValue() == 0xff) || (C->getZExtValue() == 0xffff))
17973 weight = CW_Constant;
17977 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
17978 if (C->getZExtValue() <= 3)
17979 weight = CW_Constant;
17983 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
17984 if (C->getZExtValue() <= 0xff)
17985 weight = CW_Constant;
17990 if (dyn_cast<ConstantFP>(CallOperandVal)) {
17991 weight = CW_Constant;
17995 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
17996 if ((C->getSExtValue() >= -0x80000000LL) &&
17997 (C->getSExtValue() <= 0x7fffffffLL))
17998 weight = CW_Constant;
18002 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
18003 if (C->getZExtValue() <= 0xffffffff)
18004 weight = CW_Constant;
18011 /// LowerXConstraint - try to replace an X constraint, which matches anything,
18012 /// with another that has more specific requirements based on the type of the
18013 /// corresponding operand.
18014 const char *X86TargetLowering::
18015 LowerXConstraint(EVT ConstraintVT) const {
18016 // FP X constraints get lowered to SSE1/2 registers if available, otherwise
18017 // 'f' like normal targets.
18018 if (ConstraintVT.isFloatingPoint()) {
18019 if (Subtarget->hasSSE2())
18021 if (Subtarget->hasSSE1())
18025 return TargetLowering::LowerXConstraint(ConstraintVT);
18028 /// LowerAsmOperandForConstraint - Lower the specified operand into the Ops
18029 /// vector. If it is invalid, don't add anything to Ops.
18030 void X86TargetLowering::LowerAsmOperandForConstraint(SDValue Op,
18031 std::string &Constraint,
18032 std::vector<SDValue>&Ops,
18033 SelectionDAG &DAG) const {
18034 SDValue Result(0, 0);
18036 // Only support length 1 constraints for now.
18037 if (Constraint.length() > 1) return;
18039 char ConstraintLetter = Constraint[0];
18040 switch (ConstraintLetter) {
18043 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
18044 if (C->getZExtValue() <= 31) {
18045 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
18051 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
18052 if (C->getZExtValue() <= 63) {
18053 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
18059 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
18060 if (isInt<8>(C->getSExtValue())) {
18061 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
18067 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
18068 if (C->getZExtValue() <= 255) {
18069 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
18075 // 32-bit signed value
18076 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
18077 if (ConstantInt::isValueValidForType(Type::getInt32Ty(*DAG.getContext()),
18078 C->getSExtValue())) {
18079 // Widen to 64 bits here to get it sign extended.
18080 Result = DAG.getTargetConstant(C->getSExtValue(), MVT::i64);
18083 // FIXME gcc accepts some relocatable values here too, but only in certain
18084 // memory models; it's complicated.
18089 // 32-bit unsigned value
18090 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
18091 if (ConstantInt::isValueValidForType(Type::getInt32Ty(*DAG.getContext()),
18092 C->getZExtValue())) {
18093 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
18097 // FIXME gcc accepts some relocatable values here too, but only in certain
18098 // memory models; it's complicated.
18102 // Literal immediates are always ok.
18103 if (ConstantSDNode *CST = dyn_cast<ConstantSDNode>(Op)) {
18104 // Widen to 64 bits here to get it sign extended.
18105 Result = DAG.getTargetConstant(CST->getSExtValue(), MVT::i64);
18109 // In any sort of PIC mode addresses need to be computed at runtime by
18110 // adding in a register or some sort of table lookup. These can't
18111 // be used as immediates.
18112 if (Subtarget->isPICStyleGOT() || Subtarget->isPICStyleStubPIC())
18115 // If we are in non-pic codegen mode, we allow the address of a global (with
18116 // an optional displacement) to be used with 'i'.
18117 GlobalAddressSDNode *GA = 0;
18118 int64_t Offset = 0;
18120 // Match either (GA), (GA+C), (GA+C1+C2), etc.
18122 if ((GA = dyn_cast<GlobalAddressSDNode>(Op))) {
18123 Offset += GA->getOffset();
18125 } else if (Op.getOpcode() == ISD::ADD) {
18126 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op.getOperand(1))) {
18127 Offset += C->getZExtValue();
18128 Op = Op.getOperand(0);
18131 } else if (Op.getOpcode() == ISD::SUB) {
18132 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op.getOperand(1))) {
18133 Offset += -C->getZExtValue();
18134 Op = Op.getOperand(0);
18139 // Otherwise, this isn't something we can handle, reject it.
18143 const GlobalValue *GV = GA->getGlobal();
18144 // If we require an extra load to get this address, as in PIC mode, we
18145 // can't accept it.
18146 if (isGlobalStubReference(Subtarget->ClassifyGlobalReference(GV,
18147 getTargetMachine())))
18150 Result = DAG.getTargetGlobalAddress(GV, Op.getDebugLoc(),
18151 GA->getValueType(0), Offset);
18156 if (Result.getNode()) {
18157 Ops.push_back(Result);
18160 return TargetLowering::LowerAsmOperandForConstraint(Op, Constraint, Ops, DAG);
18163 std::pair<unsigned, const TargetRegisterClass*>
18164 X86TargetLowering::getRegForInlineAsmConstraint(const std::string &Constraint,
18166 // First, see if this is a constraint that directly corresponds to an LLVM
18168 if (Constraint.size() == 1) {
18169 // GCC Constraint Letters
18170 switch (Constraint[0]) {
18172 // TODO: Slight differences here in allocation order and leaving
18173 // RIP in the class. Do they matter any more here than they do
18174 // in the normal allocation?
18175 case 'q': // GENERAL_REGS in 64-bit mode, Q_REGS in 32-bit mode.
18176 if (Subtarget->is64Bit()) {
18177 if (VT == MVT::i32 || VT == MVT::f32)
18178 return std::make_pair(0U, &X86::GR32RegClass);
18179 if (VT == MVT::i16)
18180 return std::make_pair(0U, &X86::GR16RegClass);
18181 if (VT == MVT::i8 || VT == MVT::i1)
18182 return std::make_pair(0U, &X86::GR8RegClass);
18183 if (VT == MVT::i64 || VT == MVT::f64)
18184 return std::make_pair(0U, &X86::GR64RegClass);
18187 // 32-bit fallthrough
18188 case 'Q': // Q_REGS
18189 if (VT == MVT::i32 || VT == MVT::f32)
18190 return std::make_pair(0U, &X86::GR32_ABCDRegClass);
18191 if (VT == MVT::i16)
18192 return std::make_pair(0U, &X86::GR16_ABCDRegClass);
18193 if (VT == MVT::i8 || VT == MVT::i1)
18194 return std::make_pair(0U, &X86::GR8_ABCD_LRegClass);
18195 if (VT == MVT::i64)
18196 return std::make_pair(0U, &X86::GR64_ABCDRegClass);
18198 case 'r': // GENERAL_REGS
18199 case 'l': // INDEX_REGS
18200 if (VT == MVT::i8 || VT == MVT::i1)
18201 return std::make_pair(0U, &X86::GR8RegClass);
18202 if (VT == MVT::i16)
18203 return std::make_pair(0U, &X86::GR16RegClass);
18204 if (VT == MVT::i32 || VT == MVT::f32 || !Subtarget->is64Bit())
18205 return std::make_pair(0U, &X86::GR32RegClass);
18206 return std::make_pair(0U, &X86::GR64RegClass);
18207 case 'R': // LEGACY_REGS
18208 if (VT == MVT::i8 || VT == MVT::i1)
18209 return std::make_pair(0U, &X86::GR8_NOREXRegClass);
18210 if (VT == MVT::i16)
18211 return std::make_pair(0U, &X86::GR16_NOREXRegClass);
18212 if (VT == MVT::i32 || !Subtarget->is64Bit())
18213 return std::make_pair(0U, &X86::GR32_NOREXRegClass);
18214 return std::make_pair(0U, &X86::GR64_NOREXRegClass);
18215 case 'f': // FP Stack registers.
18216 // If SSE is enabled for this VT, use f80 to ensure the isel moves the
18217 // value to the correct fpstack register class.
18218 if (VT == MVT::f32 && !isScalarFPTypeInSSEReg(VT))
18219 return std::make_pair(0U, &X86::RFP32RegClass);
18220 if (VT == MVT::f64 && !isScalarFPTypeInSSEReg(VT))
18221 return std::make_pair(0U, &X86::RFP64RegClass);
18222 return std::make_pair(0U, &X86::RFP80RegClass);
18223 case 'y': // MMX_REGS if MMX allowed.
18224 if (!Subtarget->hasMMX()) break;
18225 return std::make_pair(0U, &X86::VR64RegClass);
18226 case 'Y': // SSE_REGS if SSE2 allowed
18227 if (!Subtarget->hasSSE2()) break;
18229 case 'x': // SSE_REGS if SSE1 allowed or AVX_REGS if AVX allowed
18230 if (!Subtarget->hasSSE1()) break;
18232 switch (VT.getSimpleVT().SimpleTy) {
18234 // Scalar SSE types.
18237 return std::make_pair(0U, &X86::FR32RegClass);
18240 return std::make_pair(0U, &X86::FR64RegClass);
18248 return std::make_pair(0U, &X86::VR128RegClass);
18256 return std::make_pair(0U, &X86::VR256RegClass);
18262 // Use the default implementation in TargetLowering to convert the register
18263 // constraint into a member of a register class.
18264 std::pair<unsigned, const TargetRegisterClass*> Res;
18265 Res = TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
18267 // Not found as a standard register?
18268 if (Res.second == 0) {
18269 // Map st(0) -> st(7) -> ST0
18270 if (Constraint.size() == 7 && Constraint[0] == '{' &&
18271 tolower(Constraint[1]) == 's' &&
18272 tolower(Constraint[2]) == 't' &&
18273 Constraint[3] == '(' &&
18274 (Constraint[4] >= '0' && Constraint[4] <= '7') &&
18275 Constraint[5] == ')' &&
18276 Constraint[6] == '}') {
18278 Res.first = X86::ST0+Constraint[4]-'0';
18279 Res.second = &X86::RFP80RegClass;
18283 // GCC allows "st(0)" to be called just plain "st".
18284 if (StringRef("{st}").equals_lower(Constraint)) {
18285 Res.first = X86::ST0;
18286 Res.second = &X86::RFP80RegClass;
18291 if (StringRef("{flags}").equals_lower(Constraint)) {
18292 Res.first = X86::EFLAGS;
18293 Res.second = &X86::CCRRegClass;
18297 // 'A' means EAX + EDX.
18298 if (Constraint == "A") {
18299 Res.first = X86::EAX;
18300 Res.second = &X86::GR32_ADRegClass;
18306 // Otherwise, check to see if this is a register class of the wrong value
18307 // type. For example, we want to map "{ax},i32" -> {eax}, we don't want it to
18308 // turn into {ax},{dx}.
18309 if (Res.second->hasType(VT))
18310 return Res; // Correct type already, nothing to do.
18312 // All of the single-register GCC register classes map their values onto
18313 // 16-bit register pieces "ax","dx","cx","bx","si","di","bp","sp". If we
18314 // really want an 8-bit or 32-bit register, map to the appropriate register
18315 // class and return the appropriate register.
18316 if (Res.second == &X86::GR16RegClass) {
18317 if (VT == MVT::i8 || VT == MVT::i1) {
18318 unsigned DestReg = 0;
18319 switch (Res.first) {
18321 case X86::AX: DestReg = X86::AL; break;
18322 case X86::DX: DestReg = X86::DL; break;
18323 case X86::CX: DestReg = X86::CL; break;
18324 case X86::BX: DestReg = X86::BL; break;
18327 Res.first = DestReg;
18328 Res.second = &X86::GR8RegClass;
18330 } else if (VT == MVT::i32 || VT == MVT::f32) {
18331 unsigned DestReg = 0;
18332 switch (Res.first) {
18334 case X86::AX: DestReg = X86::EAX; break;
18335 case X86::DX: DestReg = X86::EDX; break;
18336 case X86::CX: DestReg = X86::ECX; break;
18337 case X86::BX: DestReg = X86::EBX; break;
18338 case X86::SI: DestReg = X86::ESI; break;
18339 case X86::DI: DestReg = X86::EDI; break;
18340 case X86::BP: DestReg = X86::EBP; break;
18341 case X86::SP: DestReg = X86::ESP; break;
18344 Res.first = DestReg;
18345 Res.second = &X86::GR32RegClass;
18347 } else if (VT == MVT::i64 || VT == MVT::f64) {
18348 unsigned DestReg = 0;
18349 switch (Res.first) {
18351 case X86::AX: DestReg = X86::RAX; break;
18352 case X86::DX: DestReg = X86::RDX; break;
18353 case X86::CX: DestReg = X86::RCX; break;
18354 case X86::BX: DestReg = X86::RBX; break;
18355 case X86::SI: DestReg = X86::RSI; break;
18356 case X86::DI: DestReg = X86::RDI; break;
18357 case X86::BP: DestReg = X86::RBP; break;
18358 case X86::SP: DestReg = X86::RSP; break;
18361 Res.first = DestReg;
18362 Res.second = &X86::GR64RegClass;
18365 } else if (Res.second == &X86::FR32RegClass ||
18366 Res.second == &X86::FR64RegClass ||
18367 Res.second == &X86::VR128RegClass) {
18368 // Handle references to XMM physical registers that got mapped into the
18369 // wrong class. This can happen with constraints like {xmm0} where the
18370 // target independent register mapper will just pick the first match it can
18371 // find, ignoring the required type.
18373 if (VT == MVT::f32 || VT == MVT::i32)
18374 Res.second = &X86::FR32RegClass;
18375 else if (VT == MVT::f64 || VT == MVT::i64)
18376 Res.second = &X86::FR64RegClass;
18377 else if (X86::VR128RegClass.hasType(VT))
18378 Res.second = &X86::VR128RegClass;
18379 else if (X86::VR256RegClass.hasType(VT))
18380 Res.second = &X86::VR256RegClass;