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"
18 #include "X86InstrBuilder.h"
19 #include "X86TargetMachine.h"
20 #include "X86TargetObjectFile.h"
21 #include "Utils/X86ShuffleDecode.h"
22 #include "llvm/CallingConv.h"
23 #include "llvm/Constants.h"
24 #include "llvm/DerivedTypes.h"
25 #include "llvm/GlobalAlias.h"
26 #include "llvm/GlobalVariable.h"
27 #include "llvm/Function.h"
28 #include "llvm/Instructions.h"
29 #include "llvm/Intrinsics.h"
30 #include "llvm/LLVMContext.h"
31 #include "llvm/CodeGen/IntrinsicLowering.h"
32 #include "llvm/CodeGen/MachineFrameInfo.h"
33 #include "llvm/CodeGen/MachineFunction.h"
34 #include "llvm/CodeGen/MachineInstrBuilder.h"
35 #include "llvm/CodeGen/MachineJumpTableInfo.h"
36 #include "llvm/CodeGen/MachineModuleInfo.h"
37 #include "llvm/CodeGen/MachineRegisterInfo.h"
38 #include "llvm/MC/MCAsmInfo.h"
39 #include "llvm/MC/MCContext.h"
40 #include "llvm/MC/MCExpr.h"
41 #include "llvm/MC/MCSymbol.h"
42 #include "llvm/ADT/SmallSet.h"
43 #include "llvm/ADT/Statistic.h"
44 #include "llvm/ADT/StringExtras.h"
45 #include "llvm/ADT/VariadicFunction.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"
54 STATISTIC(NumTailCalls, "Number of tail calls");
56 // Forward declarations.
57 static SDValue getMOVL(SelectionDAG &DAG, DebugLoc dl, EVT VT, SDValue V1,
60 /// Generate a DAG to grab 128-bits from a vector > 128 bits. This
61 /// sets things up to match to an AVX VEXTRACTF128 instruction or a
62 /// simple subregister reference. Idx is an index in the 128 bits we
63 /// want. It need not be aligned to a 128-bit bounday. That makes
64 /// lowering EXTRACT_VECTOR_ELT operations easier.
65 static SDValue Extract128BitVector(SDValue Vec,
69 EVT VT = Vec.getValueType();
70 assert(VT.getSizeInBits() == 256 && "Unexpected vector size!");
71 EVT ElVT = VT.getVectorElementType();
72 int Factor = VT.getSizeInBits()/128;
73 EVT ResultVT = EVT::getVectorVT(*DAG.getContext(), ElVT,
74 VT.getVectorNumElements()/Factor);
76 // Extract from UNDEF is UNDEF.
77 if (Vec.getOpcode() == ISD::UNDEF)
78 return DAG.getNode(ISD::UNDEF, dl, ResultVT);
80 if (isa<ConstantSDNode>(Idx)) {
81 unsigned IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
83 // Extract the relevant 128 bits. Generate an EXTRACT_SUBVECTOR
84 // we can match to VEXTRACTF128.
85 unsigned ElemsPerChunk = 128 / ElVT.getSizeInBits();
87 // This is the index of the first element of the 128-bit chunk
89 unsigned NormalizedIdxVal = (((IdxVal * ElVT.getSizeInBits()) / 128)
92 SDValue VecIdx = DAG.getConstant(NormalizedIdxVal, MVT::i32);
93 SDValue Result = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, ResultVT, Vec,
102 /// Generate a DAG to put 128-bits into a vector > 128 bits. This
103 /// sets things up to match to an AVX VINSERTF128 instruction or a
104 /// simple superregister reference. Idx is an index in the 128 bits
105 /// we want. It need not be aligned to a 128-bit bounday. That makes
106 /// lowering INSERT_VECTOR_ELT operations easier.
107 static SDValue Insert128BitVector(SDValue Result,
112 if (isa<ConstantSDNode>(Idx)) {
113 EVT VT = Vec.getValueType();
114 assert(VT.getSizeInBits() == 128 && "Unexpected vector size!");
116 EVT ElVT = VT.getVectorElementType();
117 unsigned IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
118 EVT ResultVT = Result.getValueType();
120 // Insert the relevant 128 bits.
121 unsigned ElemsPerChunk = 128/ElVT.getSizeInBits();
123 // This is the index of the first element of the 128-bit chunk
125 unsigned NormalizedIdxVal = (((IdxVal * ElVT.getSizeInBits())/128)
128 SDValue VecIdx = DAG.getConstant(NormalizedIdxVal, MVT::i32);
129 Result = DAG.getNode(ISD::INSERT_SUBVECTOR, dl, ResultVT, Result, Vec,
137 static TargetLoweringObjectFile *createTLOF(X86TargetMachine &TM) {
138 const X86Subtarget *Subtarget = &TM.getSubtarget<X86Subtarget>();
139 bool is64Bit = Subtarget->is64Bit();
141 if (Subtarget->isTargetEnvMacho()) {
143 return new X8664_MachoTargetObjectFile();
144 return new TargetLoweringObjectFileMachO();
147 if (Subtarget->isTargetELF())
148 return new TargetLoweringObjectFileELF();
149 if (Subtarget->isTargetCOFF() && !Subtarget->isTargetEnvMacho())
150 return new TargetLoweringObjectFileCOFF();
151 llvm_unreachable("unknown subtarget type");
154 X86TargetLowering::X86TargetLowering(X86TargetMachine &TM)
155 : TargetLowering(TM, createTLOF(TM)) {
156 Subtarget = &TM.getSubtarget<X86Subtarget>();
157 X86ScalarSSEf64 = Subtarget->hasSSE2();
158 X86ScalarSSEf32 = Subtarget->hasSSE1();
159 X86StackPtr = Subtarget->is64Bit() ? X86::RSP : X86::ESP;
161 RegInfo = TM.getRegisterInfo();
162 TD = getTargetData();
164 // Set up the TargetLowering object.
165 static MVT IntVTs[] = { MVT::i8, MVT::i16, MVT::i32, MVT::i64 };
167 // X86 is weird, it always uses i8 for shift amounts and setcc results.
168 setBooleanContents(ZeroOrOneBooleanContent);
169 // X86-SSE is even stranger. It uses -1 or 0 for vector masks.
170 setBooleanVectorContents(ZeroOrNegativeOneBooleanContent);
172 // For 64-bit since we have so many registers use the ILP scheduler, for
173 // 32-bit code use the register pressure specific scheduling.
174 // For 32 bit Atom, use Hybrid (register pressure + latency) scheduling.
175 if (Subtarget->is64Bit())
176 setSchedulingPreference(Sched::ILP);
177 else if (Subtarget->isAtom())
178 setSchedulingPreference(Sched::Hybrid);
180 setSchedulingPreference(Sched::RegPressure);
181 setStackPointerRegisterToSaveRestore(X86StackPtr);
183 if (Subtarget->isTargetWindows() && !Subtarget->isTargetCygMing()) {
184 // Setup Windows compiler runtime calls.
185 setLibcallName(RTLIB::SDIV_I64, "_alldiv");
186 setLibcallName(RTLIB::UDIV_I64, "_aulldiv");
187 setLibcallName(RTLIB::SREM_I64, "_allrem");
188 setLibcallName(RTLIB::UREM_I64, "_aullrem");
189 setLibcallName(RTLIB::MUL_I64, "_allmul");
190 setLibcallCallingConv(RTLIB::SDIV_I64, CallingConv::X86_StdCall);
191 setLibcallCallingConv(RTLIB::UDIV_I64, CallingConv::X86_StdCall);
192 setLibcallCallingConv(RTLIB::SREM_I64, CallingConv::X86_StdCall);
193 setLibcallCallingConv(RTLIB::UREM_I64, CallingConv::X86_StdCall);
194 setLibcallCallingConv(RTLIB::MUL_I64, CallingConv::X86_StdCall);
196 // The _ftol2 runtime function has an unusual calling conv, which
197 // is modeled by a special pseudo-instruction.
198 setLibcallName(RTLIB::FPTOUINT_F64_I64, 0);
199 setLibcallName(RTLIB::FPTOUINT_F32_I64, 0);
200 setLibcallName(RTLIB::FPTOUINT_F64_I32, 0);
201 setLibcallName(RTLIB::FPTOUINT_F32_I32, 0);
204 if (Subtarget->isTargetDarwin()) {
205 // Darwin should use _setjmp/_longjmp instead of setjmp/longjmp.
206 setUseUnderscoreSetJmp(false);
207 setUseUnderscoreLongJmp(false);
208 } else if (Subtarget->isTargetMingw()) {
209 // MS runtime is weird: it exports _setjmp, but longjmp!
210 setUseUnderscoreSetJmp(true);
211 setUseUnderscoreLongJmp(false);
213 setUseUnderscoreSetJmp(true);
214 setUseUnderscoreLongJmp(true);
217 // Set up the register classes.
218 addRegisterClass(MVT::i8, X86::GR8RegisterClass);
219 addRegisterClass(MVT::i16, X86::GR16RegisterClass);
220 addRegisterClass(MVT::i32, X86::GR32RegisterClass);
221 if (Subtarget->is64Bit())
222 addRegisterClass(MVT::i64, X86::GR64RegisterClass);
224 setLoadExtAction(ISD::SEXTLOAD, MVT::i1, Promote);
226 // We don't accept any truncstore of integer registers.
227 setTruncStoreAction(MVT::i64, MVT::i32, Expand);
228 setTruncStoreAction(MVT::i64, MVT::i16, Expand);
229 setTruncStoreAction(MVT::i64, MVT::i8 , Expand);
230 setTruncStoreAction(MVT::i32, MVT::i16, Expand);
231 setTruncStoreAction(MVT::i32, MVT::i8 , Expand);
232 setTruncStoreAction(MVT::i16, MVT::i8, Expand);
234 // SETOEQ and SETUNE require checking two conditions.
235 setCondCodeAction(ISD::SETOEQ, MVT::f32, Expand);
236 setCondCodeAction(ISD::SETOEQ, MVT::f64, Expand);
237 setCondCodeAction(ISD::SETOEQ, MVT::f80, Expand);
238 setCondCodeAction(ISD::SETUNE, MVT::f32, Expand);
239 setCondCodeAction(ISD::SETUNE, MVT::f64, Expand);
240 setCondCodeAction(ISD::SETUNE, MVT::f80, Expand);
242 // Promote all UINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have this
244 setOperationAction(ISD::UINT_TO_FP , MVT::i1 , Promote);
245 setOperationAction(ISD::UINT_TO_FP , MVT::i8 , Promote);
246 setOperationAction(ISD::UINT_TO_FP , MVT::i16 , Promote);
248 if (Subtarget->is64Bit()) {
249 setOperationAction(ISD::UINT_TO_FP , MVT::i32 , Promote);
250 setOperationAction(ISD::UINT_TO_FP , MVT::i64 , Custom);
251 } else if (!TM.Options.UseSoftFloat) {
252 // We have an algorithm for SSE2->double, and we turn this into a
253 // 64-bit FILD followed by conditional FADD for other targets.
254 setOperationAction(ISD::UINT_TO_FP , MVT::i64 , Custom);
255 // We have an algorithm for SSE2, and we turn this into a 64-bit
256 // FILD for other targets.
257 setOperationAction(ISD::UINT_TO_FP , MVT::i32 , Custom);
260 // Promote i1/i8 SINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have
262 setOperationAction(ISD::SINT_TO_FP , MVT::i1 , Promote);
263 setOperationAction(ISD::SINT_TO_FP , MVT::i8 , Promote);
265 if (!TM.Options.UseSoftFloat) {
266 // SSE has no i16 to fp conversion, only i32
267 if (X86ScalarSSEf32) {
268 setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Promote);
269 // f32 and f64 cases are Legal, f80 case is not
270 setOperationAction(ISD::SINT_TO_FP , MVT::i32 , Custom);
272 setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Custom);
273 setOperationAction(ISD::SINT_TO_FP , MVT::i32 , Custom);
276 setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Promote);
277 setOperationAction(ISD::SINT_TO_FP , MVT::i32 , Promote);
280 // In 32-bit mode these are custom lowered. In 64-bit mode F32 and F64
281 // are Legal, f80 is custom lowered.
282 setOperationAction(ISD::FP_TO_SINT , MVT::i64 , Custom);
283 setOperationAction(ISD::SINT_TO_FP , MVT::i64 , Custom);
285 // Promote i1/i8 FP_TO_SINT to larger FP_TO_SINTS's, as X86 doesn't have
287 setOperationAction(ISD::FP_TO_SINT , MVT::i1 , Promote);
288 setOperationAction(ISD::FP_TO_SINT , MVT::i8 , Promote);
290 if (X86ScalarSSEf32) {
291 setOperationAction(ISD::FP_TO_SINT , MVT::i16 , Promote);
292 // f32 and f64 cases are Legal, f80 case is not
293 setOperationAction(ISD::FP_TO_SINT , MVT::i32 , Custom);
295 setOperationAction(ISD::FP_TO_SINT , MVT::i16 , Custom);
296 setOperationAction(ISD::FP_TO_SINT , MVT::i32 , Custom);
299 // Handle FP_TO_UINT by promoting the destination to a larger signed
301 setOperationAction(ISD::FP_TO_UINT , MVT::i1 , Promote);
302 setOperationAction(ISD::FP_TO_UINT , MVT::i8 , Promote);
303 setOperationAction(ISD::FP_TO_UINT , MVT::i16 , Promote);
305 if (Subtarget->is64Bit()) {
306 setOperationAction(ISD::FP_TO_UINT , MVT::i64 , Expand);
307 setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Promote);
308 } else if (!TM.Options.UseSoftFloat) {
309 // Since AVX is a superset of SSE3, only check for SSE here.
310 if (Subtarget->hasSSE1() && !Subtarget->hasSSE3())
311 // Expand FP_TO_UINT into a select.
312 // FIXME: We would like to use a Custom expander here eventually to do
313 // the optimal thing for SSE vs. the default expansion in the legalizer.
314 setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Expand);
316 // With SSE3 we can use fisttpll to convert to a signed i64; without
317 // SSE, we're stuck with a fistpll.
318 setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Custom);
321 if (isTargetFTOL()) {
322 // Use the _ftol2 runtime function, which has a pseudo-instruction
323 // to handle its weird calling convention.
324 setOperationAction(ISD::FP_TO_UINT , MVT::i64 , Custom);
327 // TODO: when we have SSE, these could be more efficient, by using movd/movq.
328 if (!X86ScalarSSEf64) {
329 setOperationAction(ISD::BITCAST , MVT::f32 , Expand);
330 setOperationAction(ISD::BITCAST , MVT::i32 , Expand);
331 if (Subtarget->is64Bit()) {
332 setOperationAction(ISD::BITCAST , MVT::f64 , Expand);
333 // Without SSE, i64->f64 goes through memory.
334 setOperationAction(ISD::BITCAST , MVT::i64 , Expand);
338 // Scalar integer divide and remainder are lowered to use operations that
339 // produce two results, to match the available instructions. This exposes
340 // the two-result form to trivial CSE, which is able to combine x/y and x%y
341 // into a single instruction.
343 // Scalar integer multiply-high is also lowered to use two-result
344 // operations, to match the available instructions. However, plain multiply
345 // (low) operations are left as Legal, as there are single-result
346 // instructions for this in x86. Using the two-result multiply instructions
347 // when both high and low results are needed must be arranged by dagcombine.
348 for (unsigned i = 0, e = 4; i != e; ++i) {
350 setOperationAction(ISD::MULHS, VT, Expand);
351 setOperationAction(ISD::MULHU, VT, Expand);
352 setOperationAction(ISD::SDIV, VT, Expand);
353 setOperationAction(ISD::UDIV, VT, Expand);
354 setOperationAction(ISD::SREM, VT, Expand);
355 setOperationAction(ISD::UREM, VT, Expand);
357 // Add/Sub overflow ops with MVT::Glues are lowered to EFLAGS dependences.
358 setOperationAction(ISD::ADDC, VT, Custom);
359 setOperationAction(ISD::ADDE, VT, Custom);
360 setOperationAction(ISD::SUBC, VT, Custom);
361 setOperationAction(ISD::SUBE, VT, Custom);
364 setOperationAction(ISD::BR_JT , MVT::Other, Expand);
365 setOperationAction(ISD::BRCOND , MVT::Other, Custom);
366 setOperationAction(ISD::BR_CC , MVT::Other, Expand);
367 setOperationAction(ISD::SELECT_CC , MVT::Other, Expand);
368 if (Subtarget->is64Bit())
369 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i32, Legal);
370 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16 , Legal);
371 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8 , Legal);
372 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1 , Expand);
373 setOperationAction(ISD::FP_ROUND_INREG , MVT::f32 , Expand);
374 setOperationAction(ISD::FREM , MVT::f32 , Expand);
375 setOperationAction(ISD::FREM , MVT::f64 , Expand);
376 setOperationAction(ISD::FREM , MVT::f80 , Expand);
377 setOperationAction(ISD::FLT_ROUNDS_ , MVT::i32 , Custom);
379 // Promote the i8 variants and force them on up to i32 which has a shorter
381 setOperationAction(ISD::CTTZ , MVT::i8 , Promote);
382 AddPromotedToType (ISD::CTTZ , MVT::i8 , MVT::i32);
383 setOperationAction(ISD::CTTZ_ZERO_UNDEF , MVT::i8 , Promote);
384 AddPromotedToType (ISD::CTTZ_ZERO_UNDEF , MVT::i8 , MVT::i32);
385 if (Subtarget->hasBMI()) {
386 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i16 , Expand);
387 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i32 , Expand);
388 if (Subtarget->is64Bit())
389 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i64, Expand);
391 setOperationAction(ISD::CTTZ , MVT::i16 , Custom);
392 setOperationAction(ISD::CTTZ , MVT::i32 , Custom);
393 if (Subtarget->is64Bit())
394 setOperationAction(ISD::CTTZ , MVT::i64 , Custom);
397 if (Subtarget->hasLZCNT()) {
398 // When promoting the i8 variants, force them to i32 for a shorter
400 setOperationAction(ISD::CTLZ , MVT::i8 , Promote);
401 AddPromotedToType (ISD::CTLZ , MVT::i8 , MVT::i32);
402 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i8 , Promote);
403 AddPromotedToType (ISD::CTLZ_ZERO_UNDEF, MVT::i8 , MVT::i32);
404 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i16 , Expand);
405 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i32 , Expand);
406 if (Subtarget->is64Bit())
407 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i64, Expand);
409 setOperationAction(ISD::CTLZ , MVT::i8 , Custom);
410 setOperationAction(ISD::CTLZ , MVT::i16 , Custom);
411 setOperationAction(ISD::CTLZ , MVT::i32 , Custom);
412 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i8 , Custom);
413 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i16 , Custom);
414 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i32 , Custom);
415 if (Subtarget->is64Bit()) {
416 setOperationAction(ISD::CTLZ , MVT::i64 , Custom);
417 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i64, Custom);
421 if (Subtarget->hasPOPCNT()) {
422 setOperationAction(ISD::CTPOP , MVT::i8 , Promote);
424 setOperationAction(ISD::CTPOP , MVT::i8 , Expand);
425 setOperationAction(ISD::CTPOP , MVT::i16 , Expand);
426 setOperationAction(ISD::CTPOP , MVT::i32 , Expand);
427 if (Subtarget->is64Bit())
428 setOperationAction(ISD::CTPOP , MVT::i64 , Expand);
431 setOperationAction(ISD::READCYCLECOUNTER , MVT::i64 , Custom);
432 setOperationAction(ISD::BSWAP , MVT::i16 , Expand);
434 // These should be promoted to a larger select which is supported.
435 setOperationAction(ISD::SELECT , MVT::i1 , Promote);
436 // X86 wants to expand cmov itself.
437 setOperationAction(ISD::SELECT , MVT::i8 , Custom);
438 setOperationAction(ISD::SELECT , MVT::i16 , Custom);
439 setOperationAction(ISD::SELECT , MVT::i32 , Custom);
440 setOperationAction(ISD::SELECT , MVT::f32 , Custom);
441 setOperationAction(ISD::SELECT , MVT::f64 , Custom);
442 setOperationAction(ISD::SELECT , MVT::f80 , Custom);
443 setOperationAction(ISD::SETCC , MVT::i8 , Custom);
444 setOperationAction(ISD::SETCC , MVT::i16 , Custom);
445 setOperationAction(ISD::SETCC , MVT::i32 , Custom);
446 setOperationAction(ISD::SETCC , MVT::f32 , Custom);
447 setOperationAction(ISD::SETCC , MVT::f64 , Custom);
448 setOperationAction(ISD::SETCC , MVT::f80 , Custom);
449 if (Subtarget->is64Bit()) {
450 setOperationAction(ISD::SELECT , MVT::i64 , Custom);
451 setOperationAction(ISD::SETCC , MVT::i64 , Custom);
453 setOperationAction(ISD::EH_RETURN , MVT::Other, Custom);
456 setOperationAction(ISD::ConstantPool , MVT::i32 , Custom);
457 setOperationAction(ISD::JumpTable , MVT::i32 , Custom);
458 setOperationAction(ISD::GlobalAddress , MVT::i32 , Custom);
459 setOperationAction(ISD::GlobalTLSAddress, MVT::i32 , Custom);
460 if (Subtarget->is64Bit())
461 setOperationAction(ISD::GlobalTLSAddress, MVT::i64, Custom);
462 setOperationAction(ISD::ExternalSymbol , MVT::i32 , Custom);
463 setOperationAction(ISD::BlockAddress , MVT::i32 , Custom);
464 if (Subtarget->is64Bit()) {
465 setOperationAction(ISD::ConstantPool , MVT::i64 , Custom);
466 setOperationAction(ISD::JumpTable , MVT::i64 , Custom);
467 setOperationAction(ISD::GlobalAddress , MVT::i64 , Custom);
468 setOperationAction(ISD::ExternalSymbol, MVT::i64 , Custom);
469 setOperationAction(ISD::BlockAddress , MVT::i64 , Custom);
471 // 64-bit addm sub, shl, sra, srl (iff 32-bit x86)
472 setOperationAction(ISD::SHL_PARTS , MVT::i32 , Custom);
473 setOperationAction(ISD::SRA_PARTS , MVT::i32 , Custom);
474 setOperationAction(ISD::SRL_PARTS , MVT::i32 , Custom);
475 if (Subtarget->is64Bit()) {
476 setOperationAction(ISD::SHL_PARTS , MVT::i64 , Custom);
477 setOperationAction(ISD::SRA_PARTS , MVT::i64 , Custom);
478 setOperationAction(ISD::SRL_PARTS , MVT::i64 , Custom);
481 if (Subtarget->hasSSE1())
482 setOperationAction(ISD::PREFETCH , MVT::Other, Legal);
484 setOperationAction(ISD::MEMBARRIER , MVT::Other, Custom);
485 setOperationAction(ISD::ATOMIC_FENCE , MVT::Other, Custom);
487 // On X86 and X86-64, atomic operations are lowered to locked instructions.
488 // Locked instructions, in turn, have implicit fence semantics (all memory
489 // operations are flushed before issuing the locked instruction, and they
490 // are not buffered), so we can fold away the common pattern of
491 // fence-atomic-fence.
492 setShouldFoldAtomicFences(true);
494 // Expand certain atomics
495 for (unsigned i = 0, e = 4; i != e; ++i) {
497 setOperationAction(ISD::ATOMIC_CMP_SWAP, VT, Custom);
498 setOperationAction(ISD::ATOMIC_LOAD_SUB, VT, Custom);
499 setOperationAction(ISD::ATOMIC_STORE, VT, Custom);
502 if (!Subtarget->is64Bit()) {
503 setOperationAction(ISD::ATOMIC_LOAD, MVT::i64, Custom);
504 setOperationAction(ISD::ATOMIC_LOAD_ADD, MVT::i64, Custom);
505 setOperationAction(ISD::ATOMIC_LOAD_SUB, MVT::i64, Custom);
506 setOperationAction(ISD::ATOMIC_LOAD_AND, MVT::i64, Custom);
507 setOperationAction(ISD::ATOMIC_LOAD_OR, MVT::i64, Custom);
508 setOperationAction(ISD::ATOMIC_LOAD_XOR, MVT::i64, Custom);
509 setOperationAction(ISD::ATOMIC_LOAD_NAND, MVT::i64, Custom);
510 setOperationAction(ISD::ATOMIC_SWAP, MVT::i64, Custom);
513 if (Subtarget->hasCmpxchg16b()) {
514 setOperationAction(ISD::ATOMIC_CMP_SWAP, MVT::i128, Custom);
517 // FIXME - use subtarget debug flags
518 if (!Subtarget->isTargetDarwin() &&
519 !Subtarget->isTargetELF() &&
520 !Subtarget->isTargetCygMing()) {
521 setOperationAction(ISD::EH_LABEL, MVT::Other, Expand);
524 setOperationAction(ISD::EXCEPTIONADDR, MVT::i64, Expand);
525 setOperationAction(ISD::EHSELECTION, MVT::i64, Expand);
526 setOperationAction(ISD::EXCEPTIONADDR, MVT::i32, Expand);
527 setOperationAction(ISD::EHSELECTION, MVT::i32, Expand);
528 if (Subtarget->is64Bit()) {
529 setExceptionPointerRegister(X86::RAX);
530 setExceptionSelectorRegister(X86::RDX);
532 setExceptionPointerRegister(X86::EAX);
533 setExceptionSelectorRegister(X86::EDX);
535 setOperationAction(ISD::FRAME_TO_ARGS_OFFSET, MVT::i32, Custom);
536 setOperationAction(ISD::FRAME_TO_ARGS_OFFSET, MVT::i64, Custom);
538 setOperationAction(ISD::INIT_TRAMPOLINE, MVT::Other, Custom);
539 setOperationAction(ISD::ADJUST_TRAMPOLINE, MVT::Other, Custom);
541 setOperationAction(ISD::TRAP, MVT::Other, Legal);
543 // VASTART needs to be custom lowered to use the VarArgsFrameIndex
544 setOperationAction(ISD::VASTART , MVT::Other, Custom);
545 setOperationAction(ISD::VAEND , MVT::Other, Expand);
546 if (Subtarget->is64Bit()) {
547 setOperationAction(ISD::VAARG , MVT::Other, Custom);
548 setOperationAction(ISD::VACOPY , MVT::Other, Custom);
550 setOperationAction(ISD::VAARG , MVT::Other, Expand);
551 setOperationAction(ISD::VACOPY , MVT::Other, Expand);
554 setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
555 setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
557 if (Subtarget->isTargetCOFF() && !Subtarget->isTargetEnvMacho())
558 setOperationAction(ISD::DYNAMIC_STACKALLOC, Subtarget->is64Bit() ?
559 MVT::i64 : MVT::i32, Custom);
560 else if (TM.Options.EnableSegmentedStacks)
561 setOperationAction(ISD::DYNAMIC_STACKALLOC, Subtarget->is64Bit() ?
562 MVT::i64 : MVT::i32, Custom);
564 setOperationAction(ISD::DYNAMIC_STACKALLOC, Subtarget->is64Bit() ?
565 MVT::i64 : MVT::i32, Expand);
567 if (!TM.Options.UseSoftFloat && X86ScalarSSEf64) {
568 // f32 and f64 use SSE.
569 // Set up the FP register classes.
570 addRegisterClass(MVT::f32, X86::FR32RegisterClass);
571 addRegisterClass(MVT::f64, X86::FR64RegisterClass);
573 // Use ANDPD to simulate FABS.
574 setOperationAction(ISD::FABS , MVT::f64, Custom);
575 setOperationAction(ISD::FABS , MVT::f32, Custom);
577 // Use XORP to simulate FNEG.
578 setOperationAction(ISD::FNEG , MVT::f64, Custom);
579 setOperationAction(ISD::FNEG , MVT::f32, Custom);
581 // Use ANDPD and ORPD to simulate FCOPYSIGN.
582 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Custom);
583 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
585 // Lower this to FGETSIGNx86 plus an AND.
586 setOperationAction(ISD::FGETSIGN, MVT::i64, Custom);
587 setOperationAction(ISD::FGETSIGN, MVT::i32, Custom);
589 // We don't support sin/cos/fmod
590 setOperationAction(ISD::FSIN , MVT::f64, Expand);
591 setOperationAction(ISD::FCOS , MVT::f64, Expand);
592 setOperationAction(ISD::FSIN , MVT::f32, Expand);
593 setOperationAction(ISD::FCOS , MVT::f32, Expand);
595 // Expand FP immediates into loads from the stack, except for the special
597 addLegalFPImmediate(APFloat(+0.0)); // xorpd
598 addLegalFPImmediate(APFloat(+0.0f)); // xorps
599 } else if (!TM.Options.UseSoftFloat && X86ScalarSSEf32) {
600 // Use SSE for f32, x87 for f64.
601 // Set up the FP register classes.
602 addRegisterClass(MVT::f32, X86::FR32RegisterClass);
603 addRegisterClass(MVT::f64, X86::RFP64RegisterClass);
605 // Use ANDPS to simulate FABS.
606 setOperationAction(ISD::FABS , MVT::f32, Custom);
608 // Use XORP to simulate FNEG.
609 setOperationAction(ISD::FNEG , MVT::f32, Custom);
611 setOperationAction(ISD::UNDEF, MVT::f64, Expand);
613 // Use ANDPS and ORPS to simulate FCOPYSIGN.
614 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
615 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
617 // We don't support sin/cos/fmod
618 setOperationAction(ISD::FSIN , MVT::f32, Expand);
619 setOperationAction(ISD::FCOS , MVT::f32, Expand);
621 // Special cases we handle for FP constants.
622 addLegalFPImmediate(APFloat(+0.0f)); // xorps
623 addLegalFPImmediate(APFloat(+0.0)); // FLD0
624 addLegalFPImmediate(APFloat(+1.0)); // FLD1
625 addLegalFPImmediate(APFloat(-0.0)); // FLD0/FCHS
626 addLegalFPImmediate(APFloat(-1.0)); // FLD1/FCHS
628 if (!TM.Options.UnsafeFPMath) {
629 setOperationAction(ISD::FSIN , MVT::f64 , Expand);
630 setOperationAction(ISD::FCOS , MVT::f64 , Expand);
632 } else if (!TM.Options.UseSoftFloat) {
633 // f32 and f64 in x87.
634 // Set up the FP register classes.
635 addRegisterClass(MVT::f64, X86::RFP64RegisterClass);
636 addRegisterClass(MVT::f32, X86::RFP32RegisterClass);
638 setOperationAction(ISD::UNDEF, MVT::f64, Expand);
639 setOperationAction(ISD::UNDEF, MVT::f32, Expand);
640 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
641 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand);
643 if (!TM.Options.UnsafeFPMath) {
644 setOperationAction(ISD::FSIN , MVT::f64 , Expand);
645 setOperationAction(ISD::FCOS , MVT::f64 , Expand);
647 addLegalFPImmediate(APFloat(+0.0)); // FLD0
648 addLegalFPImmediate(APFloat(+1.0)); // FLD1
649 addLegalFPImmediate(APFloat(-0.0)); // FLD0/FCHS
650 addLegalFPImmediate(APFloat(-1.0)); // FLD1/FCHS
651 addLegalFPImmediate(APFloat(+0.0f)); // FLD0
652 addLegalFPImmediate(APFloat(+1.0f)); // FLD1
653 addLegalFPImmediate(APFloat(-0.0f)); // FLD0/FCHS
654 addLegalFPImmediate(APFloat(-1.0f)); // FLD1/FCHS
657 // We don't support FMA.
658 setOperationAction(ISD::FMA, MVT::f64, Expand);
659 setOperationAction(ISD::FMA, MVT::f32, Expand);
661 // Long double always uses X87.
662 if (!TM.Options.UseSoftFloat) {
663 addRegisterClass(MVT::f80, X86::RFP80RegisterClass);
664 setOperationAction(ISD::UNDEF, MVT::f80, Expand);
665 setOperationAction(ISD::FCOPYSIGN, MVT::f80, Expand);
667 APFloat TmpFlt = APFloat::getZero(APFloat::x87DoubleExtended);
668 addLegalFPImmediate(TmpFlt); // FLD0
670 addLegalFPImmediate(TmpFlt); // FLD0/FCHS
673 APFloat TmpFlt2(+1.0);
674 TmpFlt2.convert(APFloat::x87DoubleExtended, APFloat::rmNearestTiesToEven,
676 addLegalFPImmediate(TmpFlt2); // FLD1
677 TmpFlt2.changeSign();
678 addLegalFPImmediate(TmpFlt2); // FLD1/FCHS
681 if (!TM.Options.UnsafeFPMath) {
682 setOperationAction(ISD::FSIN , MVT::f80 , Expand);
683 setOperationAction(ISD::FCOS , MVT::f80 , Expand);
686 setOperationAction(ISD::FFLOOR, MVT::f80, Expand);
687 setOperationAction(ISD::FCEIL, MVT::f80, Expand);
688 setOperationAction(ISD::FTRUNC, MVT::f80, Expand);
689 setOperationAction(ISD::FRINT, MVT::f80, Expand);
690 setOperationAction(ISD::FNEARBYINT, MVT::f80, Expand);
691 setOperationAction(ISD::FMA, MVT::f80, Expand);
694 // Always use a library call for pow.
695 setOperationAction(ISD::FPOW , MVT::f32 , Expand);
696 setOperationAction(ISD::FPOW , MVT::f64 , Expand);
697 setOperationAction(ISD::FPOW , MVT::f80 , Expand);
699 setOperationAction(ISD::FLOG, MVT::f80, Expand);
700 setOperationAction(ISD::FLOG2, MVT::f80, Expand);
701 setOperationAction(ISD::FLOG10, MVT::f80, Expand);
702 setOperationAction(ISD::FEXP, MVT::f80, Expand);
703 setOperationAction(ISD::FEXP2, MVT::f80, Expand);
705 // First set operation action for all vector types to either promote
706 // (for widening) or expand (for scalarization). Then we will selectively
707 // turn on ones that can be effectively codegen'd.
708 for (unsigned VT = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
709 VT <= (unsigned)MVT::LAST_VECTOR_VALUETYPE; ++VT) {
710 setOperationAction(ISD::ADD , (MVT::SimpleValueType)VT, Expand);
711 setOperationAction(ISD::SUB , (MVT::SimpleValueType)VT, Expand);
712 setOperationAction(ISD::FADD, (MVT::SimpleValueType)VT, Expand);
713 setOperationAction(ISD::FNEG, (MVT::SimpleValueType)VT, Expand);
714 setOperationAction(ISD::FSUB, (MVT::SimpleValueType)VT, Expand);
715 setOperationAction(ISD::MUL , (MVT::SimpleValueType)VT, Expand);
716 setOperationAction(ISD::FMUL, (MVT::SimpleValueType)VT, Expand);
717 setOperationAction(ISD::SDIV, (MVT::SimpleValueType)VT, Expand);
718 setOperationAction(ISD::UDIV, (MVT::SimpleValueType)VT, Expand);
719 setOperationAction(ISD::FDIV, (MVT::SimpleValueType)VT, Expand);
720 setOperationAction(ISD::SREM, (MVT::SimpleValueType)VT, Expand);
721 setOperationAction(ISD::UREM, (MVT::SimpleValueType)VT, Expand);
722 setOperationAction(ISD::LOAD, (MVT::SimpleValueType)VT, Expand);
723 setOperationAction(ISD::VECTOR_SHUFFLE, (MVT::SimpleValueType)VT, Expand);
724 setOperationAction(ISD::EXTRACT_VECTOR_ELT,(MVT::SimpleValueType)VT,Expand);
725 setOperationAction(ISD::INSERT_VECTOR_ELT,(MVT::SimpleValueType)VT, Expand);
726 setOperationAction(ISD::EXTRACT_SUBVECTOR,(MVT::SimpleValueType)VT,Expand);
727 setOperationAction(ISD::INSERT_SUBVECTOR,(MVT::SimpleValueType)VT,Expand);
728 setOperationAction(ISD::FABS, (MVT::SimpleValueType)VT, Expand);
729 setOperationAction(ISD::FSIN, (MVT::SimpleValueType)VT, Expand);
730 setOperationAction(ISD::FCOS, (MVT::SimpleValueType)VT, Expand);
731 setOperationAction(ISD::FREM, (MVT::SimpleValueType)VT, Expand);
732 setOperationAction(ISD::FPOWI, (MVT::SimpleValueType)VT, Expand);
733 setOperationAction(ISD::FSQRT, (MVT::SimpleValueType)VT, Expand);
734 setOperationAction(ISD::FCOPYSIGN, (MVT::SimpleValueType)VT, Expand);
735 setOperationAction(ISD::SMUL_LOHI, (MVT::SimpleValueType)VT, Expand);
736 setOperationAction(ISD::UMUL_LOHI, (MVT::SimpleValueType)VT, Expand);
737 setOperationAction(ISD::SDIVREM, (MVT::SimpleValueType)VT, Expand);
738 setOperationAction(ISD::UDIVREM, (MVT::SimpleValueType)VT, Expand);
739 setOperationAction(ISD::FPOW, (MVT::SimpleValueType)VT, Expand);
740 setOperationAction(ISD::CTPOP, (MVT::SimpleValueType)VT, Expand);
741 setOperationAction(ISD::CTTZ, (MVT::SimpleValueType)VT, Expand);
742 setOperationAction(ISD::CTTZ_ZERO_UNDEF, (MVT::SimpleValueType)VT, Expand);
743 setOperationAction(ISD::CTLZ, (MVT::SimpleValueType)VT, Expand);
744 setOperationAction(ISD::CTLZ_ZERO_UNDEF, (MVT::SimpleValueType)VT, Expand);
745 setOperationAction(ISD::SHL, (MVT::SimpleValueType)VT, Expand);
746 setOperationAction(ISD::SRA, (MVT::SimpleValueType)VT, Expand);
747 setOperationAction(ISD::SRL, (MVT::SimpleValueType)VT, Expand);
748 setOperationAction(ISD::ROTL, (MVT::SimpleValueType)VT, Expand);
749 setOperationAction(ISD::ROTR, (MVT::SimpleValueType)VT, Expand);
750 setOperationAction(ISD::BSWAP, (MVT::SimpleValueType)VT, Expand);
751 setOperationAction(ISD::SETCC, (MVT::SimpleValueType)VT, Expand);
752 setOperationAction(ISD::FLOG, (MVT::SimpleValueType)VT, Expand);
753 setOperationAction(ISD::FLOG2, (MVT::SimpleValueType)VT, Expand);
754 setOperationAction(ISD::FLOG10, (MVT::SimpleValueType)VT, Expand);
755 setOperationAction(ISD::FEXP, (MVT::SimpleValueType)VT, Expand);
756 setOperationAction(ISD::FEXP2, (MVT::SimpleValueType)VT, Expand);
757 setOperationAction(ISD::FP_TO_UINT, (MVT::SimpleValueType)VT, Expand);
758 setOperationAction(ISD::FP_TO_SINT, (MVT::SimpleValueType)VT, Expand);
759 setOperationAction(ISD::UINT_TO_FP, (MVT::SimpleValueType)VT, Expand);
760 setOperationAction(ISD::SINT_TO_FP, (MVT::SimpleValueType)VT, Expand);
761 setOperationAction(ISD::SIGN_EXTEND_INREG, (MVT::SimpleValueType)VT,Expand);
762 setOperationAction(ISD::TRUNCATE, (MVT::SimpleValueType)VT, Expand);
763 setOperationAction(ISD::SIGN_EXTEND, (MVT::SimpleValueType)VT, Expand);
764 setOperationAction(ISD::ZERO_EXTEND, (MVT::SimpleValueType)VT, Expand);
765 setOperationAction(ISD::ANY_EXTEND, (MVT::SimpleValueType)VT, Expand);
766 setOperationAction(ISD::VSELECT, (MVT::SimpleValueType)VT, Expand);
767 for (unsigned InnerVT = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
768 InnerVT <= (unsigned)MVT::LAST_VECTOR_VALUETYPE; ++InnerVT)
769 setTruncStoreAction((MVT::SimpleValueType)VT,
770 (MVT::SimpleValueType)InnerVT, Expand);
771 setLoadExtAction(ISD::SEXTLOAD, (MVT::SimpleValueType)VT, Expand);
772 setLoadExtAction(ISD::ZEXTLOAD, (MVT::SimpleValueType)VT, Expand);
773 setLoadExtAction(ISD::EXTLOAD, (MVT::SimpleValueType)VT, Expand);
776 // FIXME: In order to prevent SSE instructions being expanded to MMX ones
777 // with -msoft-float, disable use of MMX as well.
778 if (!TM.Options.UseSoftFloat && Subtarget->hasMMX()) {
779 addRegisterClass(MVT::x86mmx, X86::VR64RegisterClass);
780 // No operations on x86mmx supported, everything uses intrinsics.
783 // MMX-sized vectors (other than x86mmx) are expected to be expanded
784 // into smaller operations.
785 setOperationAction(ISD::MULHS, MVT::v8i8, Expand);
786 setOperationAction(ISD::MULHS, MVT::v4i16, Expand);
787 setOperationAction(ISD::MULHS, MVT::v2i32, Expand);
788 setOperationAction(ISD::MULHS, MVT::v1i64, Expand);
789 setOperationAction(ISD::AND, MVT::v8i8, Expand);
790 setOperationAction(ISD::AND, MVT::v4i16, Expand);
791 setOperationAction(ISD::AND, MVT::v2i32, Expand);
792 setOperationAction(ISD::AND, MVT::v1i64, Expand);
793 setOperationAction(ISD::OR, MVT::v8i8, Expand);
794 setOperationAction(ISD::OR, MVT::v4i16, Expand);
795 setOperationAction(ISD::OR, MVT::v2i32, Expand);
796 setOperationAction(ISD::OR, MVT::v1i64, Expand);
797 setOperationAction(ISD::XOR, MVT::v8i8, Expand);
798 setOperationAction(ISD::XOR, MVT::v4i16, Expand);
799 setOperationAction(ISD::XOR, MVT::v2i32, Expand);
800 setOperationAction(ISD::XOR, MVT::v1i64, Expand);
801 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v8i8, Expand);
802 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v4i16, Expand);
803 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v2i32, Expand);
804 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v1i64, Expand);
805 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v1i64, Expand);
806 setOperationAction(ISD::SELECT, MVT::v8i8, Expand);
807 setOperationAction(ISD::SELECT, MVT::v4i16, Expand);
808 setOperationAction(ISD::SELECT, MVT::v2i32, Expand);
809 setOperationAction(ISD::SELECT, MVT::v1i64, Expand);
810 setOperationAction(ISD::BITCAST, MVT::v8i8, Expand);
811 setOperationAction(ISD::BITCAST, MVT::v4i16, Expand);
812 setOperationAction(ISD::BITCAST, MVT::v2i32, Expand);
813 setOperationAction(ISD::BITCAST, MVT::v1i64, Expand);
815 if (!TM.Options.UseSoftFloat && Subtarget->hasSSE1()) {
816 addRegisterClass(MVT::v4f32, X86::VR128RegisterClass);
818 setOperationAction(ISD::FADD, MVT::v4f32, Legal);
819 setOperationAction(ISD::FSUB, MVT::v4f32, Legal);
820 setOperationAction(ISD::FMUL, MVT::v4f32, Legal);
821 setOperationAction(ISD::FDIV, MVT::v4f32, Legal);
822 setOperationAction(ISD::FSQRT, MVT::v4f32, Legal);
823 setOperationAction(ISD::FNEG, MVT::v4f32, Custom);
824 setOperationAction(ISD::LOAD, MVT::v4f32, Legal);
825 setOperationAction(ISD::BUILD_VECTOR, MVT::v4f32, Custom);
826 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v4f32, Custom);
827 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4f32, Custom);
828 setOperationAction(ISD::SELECT, MVT::v4f32, Custom);
829 setOperationAction(ISD::SETCC, MVT::v4f32, Custom);
832 if (!TM.Options.UseSoftFloat && Subtarget->hasSSE2()) {
833 addRegisterClass(MVT::v2f64, X86::VR128RegisterClass);
835 // FIXME: Unfortunately -soft-float and -no-implicit-float means XMM
836 // registers cannot be used even for integer operations.
837 addRegisterClass(MVT::v16i8, X86::VR128RegisterClass);
838 addRegisterClass(MVT::v8i16, X86::VR128RegisterClass);
839 addRegisterClass(MVT::v4i32, X86::VR128RegisterClass);
840 addRegisterClass(MVT::v2i64, X86::VR128RegisterClass);
842 setOperationAction(ISD::ADD, MVT::v16i8, Legal);
843 setOperationAction(ISD::ADD, MVT::v8i16, Legal);
844 setOperationAction(ISD::ADD, MVT::v4i32, Legal);
845 setOperationAction(ISD::ADD, MVT::v2i64, Legal);
846 setOperationAction(ISD::MUL, MVT::v2i64, Custom);
847 setOperationAction(ISD::SUB, MVT::v16i8, Legal);
848 setOperationAction(ISD::SUB, MVT::v8i16, Legal);
849 setOperationAction(ISD::SUB, MVT::v4i32, Legal);
850 setOperationAction(ISD::SUB, MVT::v2i64, Legal);
851 setOperationAction(ISD::MUL, MVT::v8i16, Legal);
852 setOperationAction(ISD::FADD, MVT::v2f64, Legal);
853 setOperationAction(ISD::FSUB, MVT::v2f64, Legal);
854 setOperationAction(ISD::FMUL, MVT::v2f64, Legal);
855 setOperationAction(ISD::FDIV, MVT::v2f64, Legal);
856 setOperationAction(ISD::FSQRT, MVT::v2f64, Legal);
857 setOperationAction(ISD::FNEG, MVT::v2f64, Custom);
859 setOperationAction(ISD::SETCC, MVT::v2i64, Custom);
860 setOperationAction(ISD::SETCC, MVT::v16i8, Custom);
861 setOperationAction(ISD::SETCC, MVT::v8i16, Custom);
862 setOperationAction(ISD::SETCC, MVT::v4i32, Custom);
864 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v16i8, Custom);
865 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v8i16, Custom);
866 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8i16, Custom);
867 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4i32, Custom);
868 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4f32, Custom);
870 setOperationAction(ISD::CONCAT_VECTORS, MVT::v2f64, Custom);
871 setOperationAction(ISD::CONCAT_VECTORS, MVT::v2i64, Custom);
872 setOperationAction(ISD::CONCAT_VECTORS, MVT::v16i8, Custom);
873 setOperationAction(ISD::CONCAT_VECTORS, MVT::v8i16, Custom);
874 setOperationAction(ISD::CONCAT_VECTORS, MVT::v4i32, Custom);
876 // Custom lower build_vector, vector_shuffle, and extract_vector_elt.
877 for (unsigned i = (unsigned)MVT::v16i8; i != (unsigned)MVT::v2i64; ++i) {
878 EVT VT = (MVT::SimpleValueType)i;
879 // Do not attempt to custom lower non-power-of-2 vectors
880 if (!isPowerOf2_32(VT.getVectorNumElements()))
882 // Do not attempt to custom lower non-128-bit vectors
883 if (!VT.is128BitVector())
885 setOperationAction(ISD::BUILD_VECTOR,
886 VT.getSimpleVT().SimpleTy, Custom);
887 setOperationAction(ISD::VECTOR_SHUFFLE,
888 VT.getSimpleVT().SimpleTy, Custom);
889 setOperationAction(ISD::EXTRACT_VECTOR_ELT,
890 VT.getSimpleVT().SimpleTy, Custom);
893 setOperationAction(ISD::BUILD_VECTOR, MVT::v2f64, Custom);
894 setOperationAction(ISD::BUILD_VECTOR, MVT::v2i64, Custom);
895 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2f64, Custom);
896 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2i64, Custom);
897 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2f64, Custom);
898 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2f64, Custom);
900 if (Subtarget->is64Bit()) {
901 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2i64, Custom);
902 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2i64, Custom);
905 // Promote v16i8, v8i16, v4i32 load, select, and, or, xor to v2i64.
906 for (unsigned i = (unsigned)MVT::v16i8; i != (unsigned)MVT::v2i64; i++) {
907 MVT::SimpleValueType SVT = (MVT::SimpleValueType)i;
910 // Do not attempt to promote non-128-bit vectors
911 if (!VT.is128BitVector())
914 setOperationAction(ISD::AND, SVT, Promote);
915 AddPromotedToType (ISD::AND, SVT, MVT::v2i64);
916 setOperationAction(ISD::OR, SVT, Promote);
917 AddPromotedToType (ISD::OR, SVT, MVT::v2i64);
918 setOperationAction(ISD::XOR, SVT, Promote);
919 AddPromotedToType (ISD::XOR, SVT, MVT::v2i64);
920 setOperationAction(ISD::LOAD, SVT, Promote);
921 AddPromotedToType (ISD::LOAD, SVT, MVT::v2i64);
922 setOperationAction(ISD::SELECT, SVT, Promote);
923 AddPromotedToType (ISD::SELECT, SVT, MVT::v2i64);
926 setTruncStoreAction(MVT::f64, MVT::f32, Expand);
928 // Custom lower v2i64 and v2f64 selects.
929 setOperationAction(ISD::LOAD, MVT::v2f64, Legal);
930 setOperationAction(ISD::LOAD, MVT::v2i64, Legal);
931 setOperationAction(ISD::SELECT, MVT::v2f64, Custom);
932 setOperationAction(ISD::SELECT, MVT::v2i64, Custom);
934 setOperationAction(ISD::FP_TO_SINT, MVT::v4i32, Legal);
935 setOperationAction(ISD::SINT_TO_FP, MVT::v4i32, Legal);
938 if (Subtarget->hasSSE41()) {
939 setOperationAction(ISD::FFLOOR, MVT::f32, Legal);
940 setOperationAction(ISD::FCEIL, MVT::f32, Legal);
941 setOperationAction(ISD::FTRUNC, MVT::f32, Legal);
942 setOperationAction(ISD::FRINT, MVT::f32, Legal);
943 setOperationAction(ISD::FNEARBYINT, MVT::f32, Legal);
944 setOperationAction(ISD::FFLOOR, MVT::f64, Legal);
945 setOperationAction(ISD::FCEIL, MVT::f64, Legal);
946 setOperationAction(ISD::FTRUNC, MVT::f64, Legal);
947 setOperationAction(ISD::FRINT, MVT::f64, Legal);
948 setOperationAction(ISD::FNEARBYINT, MVT::f64, Legal);
950 // FIXME: Do we need to handle scalar-to-vector here?
951 setOperationAction(ISD::MUL, MVT::v4i32, Legal);
953 setOperationAction(ISD::VSELECT, MVT::v2f64, Legal);
954 setOperationAction(ISD::VSELECT, MVT::v2i64, Legal);
955 setOperationAction(ISD::VSELECT, MVT::v16i8, Legal);
956 setOperationAction(ISD::VSELECT, MVT::v4i32, Legal);
957 setOperationAction(ISD::VSELECT, MVT::v4f32, Legal);
959 // i8 and i16 vectors are custom , because the source register and source
960 // source memory operand types are not the same width. f32 vectors are
961 // custom since the immediate controlling the insert encodes additional
963 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v16i8, Custom);
964 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8i16, Custom);
965 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4i32, Custom);
966 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4f32, Custom);
968 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v16i8, Custom);
969 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v8i16, Custom);
970 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4i32, Custom);
971 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4f32, Custom);
973 // FIXME: these should be Legal but thats only for the case where
974 // the index is constant. For now custom expand to deal with that.
975 if (Subtarget->is64Bit()) {
976 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2i64, Custom);
977 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2i64, Custom);
981 if (Subtarget->hasSSE2()) {
982 setOperationAction(ISD::SRL, MVT::v8i16, Custom);
983 setOperationAction(ISD::SRL, MVT::v16i8, Custom);
985 setOperationAction(ISD::SHL, MVT::v8i16, Custom);
986 setOperationAction(ISD::SHL, MVT::v16i8, Custom);
988 setOperationAction(ISD::SRA, MVT::v8i16, Custom);
989 setOperationAction(ISD::SRA, MVT::v16i8, Custom);
991 if (Subtarget->hasAVX2()) {
992 setOperationAction(ISD::SRL, MVT::v2i64, Legal);
993 setOperationAction(ISD::SRL, MVT::v4i32, Legal);
995 setOperationAction(ISD::SHL, MVT::v2i64, Legal);
996 setOperationAction(ISD::SHL, MVT::v4i32, Legal);
998 setOperationAction(ISD::SRA, MVT::v4i32, Legal);
1000 setOperationAction(ISD::SRL, MVT::v2i64, Custom);
1001 setOperationAction(ISD::SRL, MVT::v4i32, Custom);
1003 setOperationAction(ISD::SHL, MVT::v2i64, Custom);
1004 setOperationAction(ISD::SHL, MVT::v4i32, Custom);
1006 setOperationAction(ISD::SRA, MVT::v4i32, Custom);
1010 if (Subtarget->hasSSE42())
1011 setOperationAction(ISD::SETCC, MVT::v2i64, Custom);
1013 if (!TM.Options.UseSoftFloat && Subtarget->hasAVX()) {
1014 addRegisterClass(MVT::v32i8, X86::VR256RegisterClass);
1015 addRegisterClass(MVT::v16i16, X86::VR256RegisterClass);
1016 addRegisterClass(MVT::v8i32, X86::VR256RegisterClass);
1017 addRegisterClass(MVT::v8f32, X86::VR256RegisterClass);
1018 addRegisterClass(MVT::v4i64, X86::VR256RegisterClass);
1019 addRegisterClass(MVT::v4f64, X86::VR256RegisterClass);
1021 setOperationAction(ISD::LOAD, MVT::v8f32, Legal);
1022 setOperationAction(ISD::LOAD, MVT::v4f64, Legal);
1023 setOperationAction(ISD::LOAD, MVT::v4i64, Legal);
1025 setOperationAction(ISD::FADD, MVT::v8f32, Legal);
1026 setOperationAction(ISD::FSUB, MVT::v8f32, Legal);
1027 setOperationAction(ISD::FMUL, MVT::v8f32, Legal);
1028 setOperationAction(ISD::FDIV, MVT::v8f32, Legal);
1029 setOperationAction(ISD::FSQRT, MVT::v8f32, Legal);
1030 setOperationAction(ISD::FNEG, MVT::v8f32, Custom);
1032 setOperationAction(ISD::FADD, MVT::v4f64, Legal);
1033 setOperationAction(ISD::FSUB, MVT::v4f64, Legal);
1034 setOperationAction(ISD::FMUL, MVT::v4f64, Legal);
1035 setOperationAction(ISD::FDIV, MVT::v4f64, Legal);
1036 setOperationAction(ISD::FSQRT, MVT::v4f64, Legal);
1037 setOperationAction(ISD::FNEG, MVT::v4f64, Custom);
1039 setOperationAction(ISD::FP_TO_SINT, MVT::v8i32, Legal);
1040 setOperationAction(ISD::SINT_TO_FP, MVT::v8i32, Legal);
1041 setOperationAction(ISD::FP_ROUND, MVT::v4f32, Legal);
1043 setOperationAction(ISD::CONCAT_VECTORS, MVT::v4f64, Custom);
1044 setOperationAction(ISD::CONCAT_VECTORS, MVT::v4i64, Custom);
1045 setOperationAction(ISD::CONCAT_VECTORS, MVT::v8f32, Custom);
1046 setOperationAction(ISD::CONCAT_VECTORS, MVT::v8i32, Custom);
1047 setOperationAction(ISD::CONCAT_VECTORS, MVT::v32i8, Custom);
1048 setOperationAction(ISD::CONCAT_VECTORS, MVT::v16i16, Custom);
1050 setOperationAction(ISD::SRL, MVT::v16i16, Custom);
1051 setOperationAction(ISD::SRL, MVT::v32i8, Custom);
1053 setOperationAction(ISD::SHL, MVT::v16i16, Custom);
1054 setOperationAction(ISD::SHL, MVT::v32i8, Custom);
1056 setOperationAction(ISD::SRA, MVT::v16i16, Custom);
1057 setOperationAction(ISD::SRA, MVT::v32i8, Custom);
1059 setOperationAction(ISD::SETCC, MVT::v32i8, Custom);
1060 setOperationAction(ISD::SETCC, MVT::v16i16, Custom);
1061 setOperationAction(ISD::SETCC, MVT::v8i32, Custom);
1062 setOperationAction(ISD::SETCC, MVT::v4i64, Custom);
1064 setOperationAction(ISD::SELECT, MVT::v4f64, Custom);
1065 setOperationAction(ISD::SELECT, MVT::v4i64, Custom);
1066 setOperationAction(ISD::SELECT, MVT::v8f32, Custom);
1068 setOperationAction(ISD::VSELECT, MVT::v4f64, Legal);
1069 setOperationAction(ISD::VSELECT, MVT::v4i64, Legal);
1070 setOperationAction(ISD::VSELECT, MVT::v8i32, Legal);
1071 setOperationAction(ISD::VSELECT, MVT::v8f32, Legal);
1073 if (Subtarget->hasAVX2()) {
1074 setOperationAction(ISD::ADD, MVT::v4i64, Legal);
1075 setOperationAction(ISD::ADD, MVT::v8i32, Legal);
1076 setOperationAction(ISD::ADD, MVT::v16i16, Legal);
1077 setOperationAction(ISD::ADD, MVT::v32i8, Legal);
1079 setOperationAction(ISD::SUB, MVT::v4i64, Legal);
1080 setOperationAction(ISD::SUB, MVT::v8i32, Legal);
1081 setOperationAction(ISD::SUB, MVT::v16i16, Legal);
1082 setOperationAction(ISD::SUB, MVT::v32i8, Legal);
1084 setOperationAction(ISD::MUL, MVT::v4i64, Custom);
1085 setOperationAction(ISD::MUL, MVT::v8i32, Legal);
1086 setOperationAction(ISD::MUL, MVT::v16i16, Legal);
1087 // Don't lower v32i8 because there is no 128-bit byte mul
1089 setOperationAction(ISD::VSELECT, MVT::v32i8, Legal);
1091 setOperationAction(ISD::SRL, MVT::v4i64, Legal);
1092 setOperationAction(ISD::SRL, MVT::v8i32, Legal);
1094 setOperationAction(ISD::SHL, MVT::v4i64, Legal);
1095 setOperationAction(ISD::SHL, MVT::v8i32, Legal);
1097 setOperationAction(ISD::SRA, MVT::v8i32, Legal);
1099 setOperationAction(ISD::ADD, MVT::v4i64, Custom);
1100 setOperationAction(ISD::ADD, MVT::v8i32, Custom);
1101 setOperationAction(ISD::ADD, MVT::v16i16, Custom);
1102 setOperationAction(ISD::ADD, MVT::v32i8, Custom);
1104 setOperationAction(ISD::SUB, MVT::v4i64, Custom);
1105 setOperationAction(ISD::SUB, MVT::v8i32, Custom);
1106 setOperationAction(ISD::SUB, MVT::v16i16, Custom);
1107 setOperationAction(ISD::SUB, MVT::v32i8, Custom);
1109 setOperationAction(ISD::MUL, MVT::v4i64, Custom);
1110 setOperationAction(ISD::MUL, MVT::v8i32, Custom);
1111 setOperationAction(ISD::MUL, MVT::v16i16, Custom);
1112 // Don't lower v32i8 because there is no 128-bit byte mul
1114 setOperationAction(ISD::SRL, MVT::v4i64, Custom);
1115 setOperationAction(ISD::SRL, MVT::v8i32, Custom);
1117 setOperationAction(ISD::SHL, MVT::v4i64, Custom);
1118 setOperationAction(ISD::SHL, MVT::v8i32, Custom);
1120 setOperationAction(ISD::SRA, MVT::v8i32, Custom);
1123 // Custom lower several nodes for 256-bit types.
1124 for (unsigned i = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
1125 i <= (unsigned)MVT::LAST_VECTOR_VALUETYPE; ++i) {
1126 MVT::SimpleValueType SVT = (MVT::SimpleValueType)i;
1129 // Extract subvector is special because the value type
1130 // (result) is 128-bit but the source is 256-bit wide.
1131 if (VT.is128BitVector())
1132 setOperationAction(ISD::EXTRACT_SUBVECTOR, SVT, Custom);
1134 // Do not attempt to custom lower other non-256-bit vectors
1135 if (!VT.is256BitVector())
1138 setOperationAction(ISD::BUILD_VECTOR, SVT, Custom);
1139 setOperationAction(ISD::VECTOR_SHUFFLE, SVT, Custom);
1140 setOperationAction(ISD::INSERT_VECTOR_ELT, SVT, Custom);
1141 setOperationAction(ISD::EXTRACT_VECTOR_ELT, SVT, Custom);
1142 setOperationAction(ISD::SCALAR_TO_VECTOR, SVT, Custom);
1143 setOperationAction(ISD::INSERT_SUBVECTOR, SVT, Custom);
1146 // Promote v32i8, v16i16, v8i32 select, and, or, xor to v4i64.
1147 for (unsigned i = (unsigned)MVT::v32i8; i != (unsigned)MVT::v4i64; ++i) {
1148 MVT::SimpleValueType SVT = (MVT::SimpleValueType)i;
1151 // Do not attempt to promote non-256-bit vectors
1152 if (!VT.is256BitVector())
1155 setOperationAction(ISD::AND, SVT, Promote);
1156 AddPromotedToType (ISD::AND, SVT, MVT::v4i64);
1157 setOperationAction(ISD::OR, SVT, Promote);
1158 AddPromotedToType (ISD::OR, SVT, MVT::v4i64);
1159 setOperationAction(ISD::XOR, SVT, Promote);
1160 AddPromotedToType (ISD::XOR, SVT, MVT::v4i64);
1161 setOperationAction(ISD::LOAD, SVT, Promote);
1162 AddPromotedToType (ISD::LOAD, SVT, MVT::v4i64);
1163 setOperationAction(ISD::SELECT, SVT, Promote);
1164 AddPromotedToType (ISD::SELECT, SVT, MVT::v4i64);
1168 // SIGN_EXTEND_INREGs are evaluated by the extend type. Handle the expansion
1169 // of this type with custom code.
1170 for (unsigned VT = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
1171 VT != (unsigned)MVT::LAST_VECTOR_VALUETYPE; VT++) {
1172 setOperationAction(ISD::SIGN_EXTEND_INREG, (MVT::SimpleValueType)VT,
1176 // We want to custom lower some of our intrinsics.
1177 setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
1180 // Only custom-lower 64-bit SADDO and friends on 64-bit because we don't
1181 // handle type legalization for these operations here.
1183 // FIXME: We really should do custom legalization for addition and
1184 // subtraction on x86-32 once PR3203 is fixed. We really can't do much better
1185 // than generic legalization for 64-bit multiplication-with-overflow, though.
1186 for (unsigned i = 0, e = 3+Subtarget->is64Bit(); i != e; ++i) {
1187 // Add/Sub/Mul with overflow operations are custom lowered.
1189 setOperationAction(ISD::SADDO, VT, Custom);
1190 setOperationAction(ISD::UADDO, VT, Custom);
1191 setOperationAction(ISD::SSUBO, VT, Custom);
1192 setOperationAction(ISD::USUBO, VT, Custom);
1193 setOperationAction(ISD::SMULO, VT, Custom);
1194 setOperationAction(ISD::UMULO, VT, Custom);
1197 // There are no 8-bit 3-address imul/mul instructions
1198 setOperationAction(ISD::SMULO, MVT::i8, Expand);
1199 setOperationAction(ISD::UMULO, MVT::i8, Expand);
1201 if (!Subtarget->is64Bit()) {
1202 // These libcalls are not available in 32-bit.
1203 setLibcallName(RTLIB::SHL_I128, 0);
1204 setLibcallName(RTLIB::SRL_I128, 0);
1205 setLibcallName(RTLIB::SRA_I128, 0);
1208 // We have target-specific dag combine patterns for the following nodes:
1209 setTargetDAGCombine(ISD::VECTOR_SHUFFLE);
1210 setTargetDAGCombine(ISD::EXTRACT_VECTOR_ELT);
1211 setTargetDAGCombine(ISD::VSELECT);
1212 setTargetDAGCombine(ISD::SELECT);
1213 setTargetDAGCombine(ISD::SHL);
1214 setTargetDAGCombine(ISD::SRA);
1215 setTargetDAGCombine(ISD::SRL);
1216 setTargetDAGCombine(ISD::OR);
1217 setTargetDAGCombine(ISD::AND);
1218 setTargetDAGCombine(ISD::ADD);
1219 setTargetDAGCombine(ISD::FADD);
1220 setTargetDAGCombine(ISD::FSUB);
1221 setTargetDAGCombine(ISD::SUB);
1222 setTargetDAGCombine(ISD::LOAD);
1223 setTargetDAGCombine(ISD::STORE);
1224 setTargetDAGCombine(ISD::ZERO_EXTEND);
1225 setTargetDAGCombine(ISD::SIGN_EXTEND);
1226 setTargetDAGCombine(ISD::TRUNCATE);
1227 setTargetDAGCombine(ISD::SINT_TO_FP);
1228 if (Subtarget->is64Bit())
1229 setTargetDAGCombine(ISD::MUL);
1230 if (Subtarget->hasBMI())
1231 setTargetDAGCombine(ISD::XOR);
1233 computeRegisterProperties();
1235 // On Darwin, -Os means optimize for size without hurting performance,
1236 // do not reduce the limit.
1237 maxStoresPerMemset = 16; // For @llvm.memset -> sequence of stores
1238 maxStoresPerMemsetOptSize = Subtarget->isTargetDarwin() ? 16 : 8;
1239 maxStoresPerMemcpy = 8; // For @llvm.memcpy -> sequence of stores
1240 maxStoresPerMemcpyOptSize = Subtarget->isTargetDarwin() ? 8 : 4;
1241 maxStoresPerMemmove = 8; // For @llvm.memmove -> sequence of stores
1242 maxStoresPerMemmoveOptSize = Subtarget->isTargetDarwin() ? 8 : 4;
1243 setPrefLoopAlignment(4); // 2^4 bytes.
1244 benefitFromCodePlacementOpt = true;
1246 setPrefFunctionAlignment(4); // 2^4 bytes.
1250 EVT X86TargetLowering::getSetCCResultType(EVT VT) const {
1251 if (!VT.isVector()) return MVT::i8;
1252 return VT.changeVectorElementTypeToInteger();
1256 /// getMaxByValAlign - Helper for getByValTypeAlignment to determine
1257 /// the desired ByVal argument alignment.
1258 static void getMaxByValAlign(Type *Ty, unsigned &MaxAlign) {
1261 if (VectorType *VTy = dyn_cast<VectorType>(Ty)) {
1262 if (VTy->getBitWidth() == 128)
1264 } else if (ArrayType *ATy = dyn_cast<ArrayType>(Ty)) {
1265 unsigned EltAlign = 0;
1266 getMaxByValAlign(ATy->getElementType(), EltAlign);
1267 if (EltAlign > MaxAlign)
1268 MaxAlign = EltAlign;
1269 } else if (StructType *STy = dyn_cast<StructType>(Ty)) {
1270 for (unsigned i = 0, e = STy->getNumElements(); i != e; ++i) {
1271 unsigned EltAlign = 0;
1272 getMaxByValAlign(STy->getElementType(i), EltAlign);
1273 if (EltAlign > MaxAlign)
1274 MaxAlign = EltAlign;
1282 /// getByValTypeAlignment - Return the desired alignment for ByVal aggregate
1283 /// function arguments in the caller parameter area. For X86, aggregates
1284 /// that contain SSE vectors are placed at 16-byte boundaries while the rest
1285 /// are at 4-byte boundaries.
1286 unsigned X86TargetLowering::getByValTypeAlignment(Type *Ty) const {
1287 if (Subtarget->is64Bit()) {
1288 // Max of 8 and alignment of type.
1289 unsigned TyAlign = TD->getABITypeAlignment(Ty);
1296 if (Subtarget->hasSSE1())
1297 getMaxByValAlign(Ty, Align);
1301 /// getOptimalMemOpType - Returns the target specific optimal type for load
1302 /// and store operations as a result of memset, memcpy, and memmove
1303 /// lowering. If DstAlign is zero that means it's safe to destination
1304 /// alignment can satisfy any constraint. Similarly if SrcAlign is zero it
1305 /// means there isn't a need to check it against alignment requirement,
1306 /// probably because the source does not need to be loaded. If
1307 /// 'IsZeroVal' is true, that means it's safe to return a
1308 /// non-scalar-integer type, e.g. empty string source, constant, or loaded
1309 /// from memory. 'MemcpyStrSrc' indicates whether the memcpy source is
1310 /// constant so it does not need to be loaded.
1311 /// It returns EVT::Other if the type should be determined using generic
1312 /// target-independent logic.
1314 X86TargetLowering::getOptimalMemOpType(uint64_t Size,
1315 unsigned DstAlign, unsigned SrcAlign,
1318 MachineFunction &MF) const {
1319 // FIXME: This turns off use of xmm stores for memset/memcpy on targets like
1320 // linux. This is because the stack realignment code can't handle certain
1321 // cases like PR2962. This should be removed when PR2962 is fixed.
1322 const Function *F = MF.getFunction();
1324 !F->hasFnAttr(Attribute::NoImplicitFloat)) {
1326 (Subtarget->isUnalignedMemAccessFast() ||
1327 ((DstAlign == 0 || DstAlign >= 16) &&
1328 (SrcAlign == 0 || SrcAlign >= 16))) &&
1329 Subtarget->getStackAlignment() >= 16) {
1330 if (Subtarget->getStackAlignment() >= 32) {
1331 if (Subtarget->hasAVX2())
1333 if (Subtarget->hasAVX())
1336 if (Subtarget->hasSSE2())
1338 if (Subtarget->hasSSE1())
1340 } else if (!MemcpyStrSrc && Size >= 8 &&
1341 !Subtarget->is64Bit() &&
1342 Subtarget->getStackAlignment() >= 8 &&
1343 Subtarget->hasSSE2()) {
1344 // Do not use f64 to lower memcpy if source is string constant. It's
1345 // better to use i32 to avoid the loads.
1349 if (Subtarget->is64Bit() && Size >= 8)
1354 /// getJumpTableEncoding - Return the entry encoding for a jump table in the
1355 /// current function. The returned value is a member of the
1356 /// MachineJumpTableInfo::JTEntryKind enum.
1357 unsigned X86TargetLowering::getJumpTableEncoding() const {
1358 // In GOT pic mode, each entry in the jump table is emitted as a @GOTOFF
1360 if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
1361 Subtarget->isPICStyleGOT())
1362 return MachineJumpTableInfo::EK_Custom32;
1364 // Otherwise, use the normal jump table encoding heuristics.
1365 return TargetLowering::getJumpTableEncoding();
1369 X86TargetLowering::LowerCustomJumpTableEntry(const MachineJumpTableInfo *MJTI,
1370 const MachineBasicBlock *MBB,
1371 unsigned uid,MCContext &Ctx) const{
1372 assert(getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
1373 Subtarget->isPICStyleGOT());
1374 // In 32-bit ELF systems, our jump table entries are formed with @GOTOFF
1376 return MCSymbolRefExpr::Create(MBB->getSymbol(),
1377 MCSymbolRefExpr::VK_GOTOFF, Ctx);
1380 /// getPICJumpTableRelocaBase - Returns relocation base for the given PIC
1382 SDValue X86TargetLowering::getPICJumpTableRelocBase(SDValue Table,
1383 SelectionDAG &DAG) const {
1384 if (!Subtarget->is64Bit())
1385 // This doesn't have DebugLoc associated with it, but is not really the
1386 // same as a Register.
1387 return DAG.getNode(X86ISD::GlobalBaseReg, DebugLoc(), getPointerTy());
1391 /// getPICJumpTableRelocBaseExpr - This returns the relocation base for the
1392 /// given PIC jumptable, the same as getPICJumpTableRelocBase, but as an
1394 const MCExpr *X86TargetLowering::
1395 getPICJumpTableRelocBaseExpr(const MachineFunction *MF, unsigned JTI,
1396 MCContext &Ctx) const {
1397 // X86-64 uses RIP relative addressing based on the jump table label.
1398 if (Subtarget->isPICStyleRIPRel())
1399 return TargetLowering::getPICJumpTableRelocBaseExpr(MF, JTI, Ctx);
1401 // Otherwise, the reference is relative to the PIC base.
1402 return MCSymbolRefExpr::Create(MF->getPICBaseSymbol(), Ctx);
1405 // FIXME: Why this routine is here? Move to RegInfo!
1406 std::pair<const TargetRegisterClass*, uint8_t>
1407 X86TargetLowering::findRepresentativeClass(EVT VT) const{
1408 const TargetRegisterClass *RRC = 0;
1410 switch (VT.getSimpleVT().SimpleTy) {
1412 return TargetLowering::findRepresentativeClass(VT);
1413 case MVT::i8: case MVT::i16: case MVT::i32: case MVT::i64:
1414 RRC = (Subtarget->is64Bit()
1415 ? X86::GR64RegisterClass : X86::GR32RegisterClass);
1418 RRC = X86::VR64RegisterClass;
1420 case MVT::f32: case MVT::f64:
1421 case MVT::v16i8: case MVT::v8i16: case MVT::v4i32: case MVT::v2i64:
1422 case MVT::v4f32: case MVT::v2f64:
1423 case MVT::v32i8: case MVT::v8i32: case MVT::v4i64: case MVT::v8f32:
1425 RRC = X86::VR128RegisterClass;
1428 return std::make_pair(RRC, Cost);
1431 bool X86TargetLowering::getStackCookieLocation(unsigned &AddressSpace,
1432 unsigned &Offset) const {
1433 if (!Subtarget->isTargetLinux())
1436 if (Subtarget->is64Bit()) {
1437 // %fs:0x28, unless we're using a Kernel code model, in which case it's %gs:
1439 if (getTargetMachine().getCodeModel() == CodeModel::Kernel)
1452 //===----------------------------------------------------------------------===//
1453 // Return Value Calling Convention Implementation
1454 //===----------------------------------------------------------------------===//
1456 #include "X86GenCallingConv.inc"
1459 X86TargetLowering::CanLowerReturn(CallingConv::ID CallConv,
1460 MachineFunction &MF, bool isVarArg,
1461 const SmallVectorImpl<ISD::OutputArg> &Outs,
1462 LLVMContext &Context) const {
1463 SmallVector<CCValAssign, 16> RVLocs;
1464 CCState CCInfo(CallConv, isVarArg, MF, getTargetMachine(),
1466 return CCInfo.CheckReturn(Outs, RetCC_X86);
1470 X86TargetLowering::LowerReturn(SDValue Chain,
1471 CallingConv::ID CallConv, bool isVarArg,
1472 const SmallVectorImpl<ISD::OutputArg> &Outs,
1473 const SmallVectorImpl<SDValue> &OutVals,
1474 DebugLoc dl, SelectionDAG &DAG) const {
1475 MachineFunction &MF = DAG.getMachineFunction();
1476 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
1478 SmallVector<CCValAssign, 16> RVLocs;
1479 CCState CCInfo(CallConv, isVarArg, MF, getTargetMachine(),
1480 RVLocs, *DAG.getContext());
1481 CCInfo.AnalyzeReturn(Outs, RetCC_X86);
1483 // Add the regs to the liveout set for the function.
1484 MachineRegisterInfo &MRI = DAG.getMachineFunction().getRegInfo();
1485 for (unsigned i = 0; i != RVLocs.size(); ++i)
1486 if (RVLocs[i].isRegLoc() && !MRI.isLiveOut(RVLocs[i].getLocReg()))
1487 MRI.addLiveOut(RVLocs[i].getLocReg());
1491 SmallVector<SDValue, 6> RetOps;
1492 RetOps.push_back(Chain); // Operand #0 = Chain (updated below)
1493 // Operand #1 = Bytes To Pop
1494 RetOps.push_back(DAG.getTargetConstant(FuncInfo->getBytesToPopOnReturn(),
1497 // Copy the result values into the output registers.
1498 for (unsigned i = 0; i != RVLocs.size(); ++i) {
1499 CCValAssign &VA = RVLocs[i];
1500 assert(VA.isRegLoc() && "Can only return in registers!");
1501 SDValue ValToCopy = OutVals[i];
1502 EVT ValVT = ValToCopy.getValueType();
1504 // If this is x86-64, and we disabled SSE, we can't return FP values,
1505 // or SSE or MMX vectors.
1506 if ((ValVT == MVT::f32 || ValVT == MVT::f64 ||
1507 VA.getLocReg() == X86::XMM0 || VA.getLocReg() == X86::XMM1) &&
1508 (Subtarget->is64Bit() && !Subtarget->hasSSE1())) {
1509 report_fatal_error("SSE register return with SSE disabled");
1511 // Likewise we can't return F64 values with SSE1 only. gcc does so, but
1512 // llvm-gcc has never done it right and no one has noticed, so this
1513 // should be OK for now.
1514 if (ValVT == MVT::f64 &&
1515 (Subtarget->is64Bit() && !Subtarget->hasSSE2()))
1516 report_fatal_error("SSE2 register return with SSE2 disabled");
1518 // Returns in ST0/ST1 are handled specially: these are pushed as operands to
1519 // the RET instruction and handled by the FP Stackifier.
1520 if (VA.getLocReg() == X86::ST0 ||
1521 VA.getLocReg() == X86::ST1) {
1522 // If this is a copy from an xmm register to ST(0), use an FPExtend to
1523 // change the value to the FP stack register class.
1524 if (isScalarFPTypeInSSEReg(VA.getValVT()))
1525 ValToCopy = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f80, ValToCopy);
1526 RetOps.push_back(ValToCopy);
1527 // Don't emit a copytoreg.
1531 // 64-bit vector (MMX) values are returned in XMM0 / XMM1 except for v1i64
1532 // which is returned in RAX / RDX.
1533 if (Subtarget->is64Bit()) {
1534 if (ValVT == MVT::x86mmx) {
1535 if (VA.getLocReg() == X86::XMM0 || VA.getLocReg() == X86::XMM1) {
1536 ValToCopy = DAG.getNode(ISD::BITCAST, dl, MVT::i64, ValToCopy);
1537 ValToCopy = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2i64,
1539 // If we don't have SSE2 available, convert to v4f32 so the generated
1540 // register is legal.
1541 if (!Subtarget->hasSSE2())
1542 ValToCopy = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32,ValToCopy);
1547 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), ValToCopy, Flag);
1548 Flag = Chain.getValue(1);
1551 // The x86-64 ABI for returning structs by value requires that we copy
1552 // the sret argument into %rax for the return. We saved the argument into
1553 // a virtual register in the entry block, so now we copy the value out
1555 if (Subtarget->is64Bit() &&
1556 DAG.getMachineFunction().getFunction()->hasStructRetAttr()) {
1557 MachineFunction &MF = DAG.getMachineFunction();
1558 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
1559 unsigned Reg = FuncInfo->getSRetReturnReg();
1561 "SRetReturnReg should have been set in LowerFormalArguments().");
1562 SDValue Val = DAG.getCopyFromReg(Chain, dl, Reg, getPointerTy());
1564 Chain = DAG.getCopyToReg(Chain, dl, X86::RAX, Val, Flag);
1565 Flag = Chain.getValue(1);
1567 // RAX now acts like a return value.
1568 MRI.addLiveOut(X86::RAX);
1571 RetOps[0] = Chain; // Update chain.
1573 // Add the flag if we have it.
1575 RetOps.push_back(Flag);
1577 return DAG.getNode(X86ISD::RET_FLAG, dl,
1578 MVT::Other, &RetOps[0], RetOps.size());
1581 bool X86TargetLowering::isUsedByReturnOnly(SDNode *N, SDValue &Chain) const {
1582 if (N->getNumValues() != 1)
1584 if (!N->hasNUsesOfValue(1, 0))
1587 SDValue TCChain = Chain;
1588 SDNode *Copy = *N->use_begin();
1589 if (Copy->getOpcode() == ISD::CopyToReg) {
1590 // If the copy has a glue operand, we conservatively assume it isn't safe to
1591 // perform a tail call.
1592 if (Copy->getOperand(Copy->getNumOperands()-1).getValueType() == MVT::Glue)
1594 TCChain = Copy->getOperand(0);
1595 } else if (Copy->getOpcode() != ISD::FP_EXTEND)
1598 bool HasRet = false;
1599 for (SDNode::use_iterator UI = Copy->use_begin(), UE = Copy->use_end();
1601 if (UI->getOpcode() != X86ISD::RET_FLAG)
1614 X86TargetLowering::getTypeForExtArgOrReturn(LLVMContext &Context, EVT VT,
1615 ISD::NodeType ExtendKind) const {
1617 // TODO: Is this also valid on 32-bit?
1618 if (Subtarget->is64Bit() && VT == MVT::i1 && ExtendKind == ISD::ZERO_EXTEND)
1619 ReturnMVT = MVT::i8;
1621 ReturnMVT = MVT::i32;
1623 EVT MinVT = getRegisterType(Context, ReturnMVT);
1624 return VT.bitsLT(MinVT) ? MinVT : VT;
1627 /// LowerCallResult - Lower the result values of a call into the
1628 /// appropriate copies out of appropriate physical registers.
1631 X86TargetLowering::LowerCallResult(SDValue Chain, SDValue InFlag,
1632 CallingConv::ID CallConv, bool isVarArg,
1633 const SmallVectorImpl<ISD::InputArg> &Ins,
1634 DebugLoc dl, SelectionDAG &DAG,
1635 SmallVectorImpl<SDValue> &InVals) const {
1637 // Assign locations to each value returned by this call.
1638 SmallVector<CCValAssign, 16> RVLocs;
1639 bool Is64Bit = Subtarget->is64Bit();
1640 CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
1641 getTargetMachine(), RVLocs, *DAG.getContext());
1642 CCInfo.AnalyzeCallResult(Ins, RetCC_X86);
1644 // Copy all of the result registers out of their specified physreg.
1645 for (unsigned i = 0; i != RVLocs.size(); ++i) {
1646 CCValAssign &VA = RVLocs[i];
1647 EVT CopyVT = VA.getValVT();
1649 // If this is x86-64, and we disabled SSE, we can't return FP values
1650 if ((CopyVT == MVT::f32 || CopyVT == MVT::f64) &&
1651 ((Is64Bit || Ins[i].Flags.isInReg()) && !Subtarget->hasSSE1())) {
1652 report_fatal_error("SSE register return with SSE disabled");
1657 // If this is a call to a function that returns an fp value on the floating
1658 // point stack, we must guarantee the the value is popped from the stack, so
1659 // a CopyFromReg is not good enough - the copy instruction may be eliminated
1660 // if the return value is not used. We use the FpPOP_RETVAL instruction
1662 if (VA.getLocReg() == X86::ST0 || VA.getLocReg() == X86::ST1) {
1663 // If we prefer to use the value in xmm registers, copy it out as f80 and
1664 // use a truncate to move it from fp stack reg to xmm reg.
1665 if (isScalarFPTypeInSSEReg(VA.getValVT())) CopyVT = MVT::f80;
1666 SDValue Ops[] = { Chain, InFlag };
1667 Chain = SDValue(DAG.getMachineNode(X86::FpPOP_RETVAL, dl, CopyVT,
1668 MVT::Other, MVT::Glue, Ops, 2), 1);
1669 Val = Chain.getValue(0);
1671 // Round the f80 to the right size, which also moves it to the appropriate
1673 if (CopyVT != VA.getValVT())
1674 Val = DAG.getNode(ISD::FP_ROUND, dl, VA.getValVT(), Val,
1675 // This truncation won't change the value.
1676 DAG.getIntPtrConstant(1));
1678 Chain = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(),
1679 CopyVT, InFlag).getValue(1);
1680 Val = Chain.getValue(0);
1682 InFlag = Chain.getValue(2);
1683 InVals.push_back(Val);
1690 //===----------------------------------------------------------------------===//
1691 // C & StdCall & Fast Calling Convention implementation
1692 //===----------------------------------------------------------------------===//
1693 // StdCall calling convention seems to be standard for many Windows' API
1694 // routines and around. It differs from C calling convention just a little:
1695 // callee should clean up the stack, not caller. Symbols should be also
1696 // decorated in some fancy way :) It doesn't support any vector arguments.
1697 // For info on fast calling convention see Fast Calling Convention (tail call)
1698 // implementation LowerX86_32FastCCCallTo.
1700 /// CallIsStructReturn - Determines whether a call uses struct return
1702 static bool CallIsStructReturn(const SmallVectorImpl<ISD::OutputArg> &Outs) {
1706 return Outs[0].Flags.isSRet();
1709 /// ArgsAreStructReturn - Determines whether a function uses struct
1710 /// return semantics.
1712 ArgsAreStructReturn(const SmallVectorImpl<ISD::InputArg> &Ins) {
1716 return Ins[0].Flags.isSRet();
1719 /// CreateCopyOfByValArgument - Make a copy of an aggregate at address specified
1720 /// by "Src" to address "Dst" with size and alignment information specified by
1721 /// the specific parameter attribute. The copy will be passed as a byval
1722 /// function parameter.
1724 CreateCopyOfByValArgument(SDValue Src, SDValue Dst, SDValue Chain,
1725 ISD::ArgFlagsTy Flags, SelectionDAG &DAG,
1727 SDValue SizeNode = DAG.getConstant(Flags.getByValSize(), MVT::i32);
1729 return DAG.getMemcpy(Chain, dl, Dst, Src, SizeNode, Flags.getByValAlign(),
1730 /*isVolatile*/false, /*AlwaysInline=*/true,
1731 MachinePointerInfo(), MachinePointerInfo());
1734 /// IsTailCallConvention - Return true if the calling convention is one that
1735 /// supports tail call optimization.
1736 static bool IsTailCallConvention(CallingConv::ID CC) {
1737 return (CC == CallingConv::Fast || CC == CallingConv::GHC);
1740 bool X86TargetLowering::mayBeEmittedAsTailCall(CallInst *CI) const {
1741 if (!CI->isTailCall() || getTargetMachine().Options.DisableTailCalls)
1745 CallingConv::ID CalleeCC = CS.getCallingConv();
1746 if (!IsTailCallConvention(CalleeCC) && CalleeCC != CallingConv::C)
1752 /// FuncIsMadeTailCallSafe - Return true if the function is being made into
1753 /// a tailcall target by changing its ABI.
1754 static bool FuncIsMadeTailCallSafe(CallingConv::ID CC,
1755 bool GuaranteedTailCallOpt) {
1756 return GuaranteedTailCallOpt && IsTailCallConvention(CC);
1760 X86TargetLowering::LowerMemArgument(SDValue Chain,
1761 CallingConv::ID CallConv,
1762 const SmallVectorImpl<ISD::InputArg> &Ins,
1763 DebugLoc dl, SelectionDAG &DAG,
1764 const CCValAssign &VA,
1765 MachineFrameInfo *MFI,
1767 // Create the nodes corresponding to a load from this parameter slot.
1768 ISD::ArgFlagsTy Flags = Ins[i].Flags;
1769 bool AlwaysUseMutable = FuncIsMadeTailCallSafe(CallConv,
1770 getTargetMachine().Options.GuaranteedTailCallOpt);
1771 bool isImmutable = !AlwaysUseMutable && !Flags.isByVal();
1774 // If value is passed by pointer we have address passed instead of the value
1776 if (VA.getLocInfo() == CCValAssign::Indirect)
1777 ValVT = VA.getLocVT();
1779 ValVT = VA.getValVT();
1781 // FIXME: For now, all byval parameter objects are marked mutable. This can be
1782 // changed with more analysis.
1783 // In case of tail call optimization mark all arguments mutable. Since they
1784 // could be overwritten by lowering of arguments in case of a tail call.
1785 if (Flags.isByVal()) {
1786 unsigned Bytes = Flags.getByValSize();
1787 if (Bytes == 0) Bytes = 1; // Don't create zero-sized stack objects.
1788 int FI = MFI->CreateFixedObject(Bytes, VA.getLocMemOffset(), isImmutable);
1789 return DAG.getFrameIndex(FI, getPointerTy());
1791 int FI = MFI->CreateFixedObject(ValVT.getSizeInBits()/8,
1792 VA.getLocMemOffset(), isImmutable);
1793 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
1794 return DAG.getLoad(ValVT, dl, Chain, FIN,
1795 MachinePointerInfo::getFixedStack(FI),
1796 false, false, false, 0);
1801 X86TargetLowering::LowerFormalArguments(SDValue Chain,
1802 CallingConv::ID CallConv,
1804 const SmallVectorImpl<ISD::InputArg> &Ins,
1807 SmallVectorImpl<SDValue> &InVals)
1809 MachineFunction &MF = DAG.getMachineFunction();
1810 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
1812 const Function* Fn = MF.getFunction();
1813 if (Fn->hasExternalLinkage() &&
1814 Subtarget->isTargetCygMing() &&
1815 Fn->getName() == "main")
1816 FuncInfo->setForceFramePointer(true);
1818 MachineFrameInfo *MFI = MF.getFrameInfo();
1819 bool Is64Bit = Subtarget->is64Bit();
1820 bool IsWindows = Subtarget->isTargetWindows();
1821 bool IsWin64 = Subtarget->isTargetWin64();
1823 assert(!(isVarArg && IsTailCallConvention(CallConv)) &&
1824 "Var args not supported with calling convention fastcc or ghc");
1826 // Assign locations to all of the incoming arguments.
1827 SmallVector<CCValAssign, 16> ArgLocs;
1828 CCState CCInfo(CallConv, isVarArg, MF, getTargetMachine(),
1829 ArgLocs, *DAG.getContext());
1831 // Allocate shadow area for Win64
1833 CCInfo.AllocateStack(32, 8);
1836 CCInfo.AnalyzeFormalArguments(Ins, CC_X86);
1838 unsigned LastVal = ~0U;
1840 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
1841 CCValAssign &VA = ArgLocs[i];
1842 // TODO: If an arg is passed in two places (e.g. reg and stack), skip later
1844 assert(VA.getValNo() != LastVal &&
1845 "Don't support value assigned to multiple locs yet");
1847 LastVal = VA.getValNo();
1849 if (VA.isRegLoc()) {
1850 EVT RegVT = VA.getLocVT();
1851 const TargetRegisterClass *RC;
1852 if (RegVT == MVT::i32)
1853 RC = X86::GR32RegisterClass;
1854 else if (Is64Bit && RegVT == MVT::i64)
1855 RC = X86::GR64RegisterClass;
1856 else if (RegVT == MVT::f32)
1857 RC = X86::FR32RegisterClass;
1858 else if (RegVT == MVT::f64)
1859 RC = X86::FR64RegisterClass;
1860 else if (RegVT.isVector() && RegVT.getSizeInBits() == 256)
1861 RC = X86::VR256RegisterClass;
1862 else if (RegVT.isVector() && RegVT.getSizeInBits() == 128)
1863 RC = X86::VR128RegisterClass;
1864 else if (RegVT == MVT::x86mmx)
1865 RC = X86::VR64RegisterClass;
1867 llvm_unreachable("Unknown argument type!");
1869 unsigned Reg = MF.addLiveIn(VA.getLocReg(), RC);
1870 ArgValue = DAG.getCopyFromReg(Chain, dl, Reg, RegVT);
1872 // If this is an 8 or 16-bit value, it is really passed promoted to 32
1873 // bits. Insert an assert[sz]ext to capture this, then truncate to the
1875 if (VA.getLocInfo() == CCValAssign::SExt)
1876 ArgValue = DAG.getNode(ISD::AssertSext, dl, RegVT, ArgValue,
1877 DAG.getValueType(VA.getValVT()));
1878 else if (VA.getLocInfo() == CCValAssign::ZExt)
1879 ArgValue = DAG.getNode(ISD::AssertZext, dl, RegVT, ArgValue,
1880 DAG.getValueType(VA.getValVT()));
1881 else if (VA.getLocInfo() == CCValAssign::BCvt)
1882 ArgValue = DAG.getNode(ISD::BITCAST, dl, VA.getValVT(), ArgValue);
1884 if (VA.isExtInLoc()) {
1885 // Handle MMX values passed in XMM regs.
1886 if (RegVT.isVector()) {
1887 ArgValue = DAG.getNode(X86ISD::MOVDQ2Q, dl, VA.getValVT(),
1890 ArgValue = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), ArgValue);
1893 assert(VA.isMemLoc());
1894 ArgValue = LowerMemArgument(Chain, CallConv, Ins, dl, DAG, VA, MFI, i);
1897 // If value is passed via pointer - do a load.
1898 if (VA.getLocInfo() == CCValAssign::Indirect)
1899 ArgValue = DAG.getLoad(VA.getValVT(), dl, Chain, ArgValue,
1900 MachinePointerInfo(), false, false, false, 0);
1902 InVals.push_back(ArgValue);
1905 // The x86-64 ABI for returning structs by value requires that we copy
1906 // the sret argument into %rax for the return. Save the argument into
1907 // a virtual register so that we can access it from the return points.
1908 if (Is64Bit && MF.getFunction()->hasStructRetAttr()) {
1909 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
1910 unsigned Reg = FuncInfo->getSRetReturnReg();
1912 Reg = MF.getRegInfo().createVirtualRegister(getRegClassFor(MVT::i64));
1913 FuncInfo->setSRetReturnReg(Reg);
1915 SDValue Copy = DAG.getCopyToReg(DAG.getEntryNode(), dl, Reg, InVals[0]);
1916 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Copy, Chain);
1919 unsigned StackSize = CCInfo.getNextStackOffset();
1920 // Align stack specially for tail calls.
1921 if (FuncIsMadeTailCallSafe(CallConv,
1922 MF.getTarget().Options.GuaranteedTailCallOpt))
1923 StackSize = GetAlignedArgumentStackSize(StackSize, DAG);
1925 // If the function takes variable number of arguments, make a frame index for
1926 // the start of the first vararg value... for expansion of llvm.va_start.
1928 if (Is64Bit || (CallConv != CallingConv::X86_FastCall &&
1929 CallConv != CallingConv::X86_ThisCall)) {
1930 FuncInfo->setVarArgsFrameIndex(MFI->CreateFixedObject(1, StackSize,true));
1933 unsigned TotalNumIntRegs = 0, TotalNumXMMRegs = 0;
1935 // FIXME: We should really autogenerate these arrays
1936 static const uint16_t GPR64ArgRegsWin64[] = {
1937 X86::RCX, X86::RDX, X86::R8, X86::R9
1939 static const uint16_t GPR64ArgRegs64Bit[] = {
1940 X86::RDI, X86::RSI, X86::RDX, X86::RCX, X86::R8, X86::R9
1942 static const uint16_t XMMArgRegs64Bit[] = {
1943 X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3,
1944 X86::XMM4, X86::XMM5, X86::XMM6, X86::XMM7
1946 const uint16_t *GPR64ArgRegs;
1947 unsigned NumXMMRegs = 0;
1950 // The XMM registers which might contain var arg parameters are shadowed
1951 // in their paired GPR. So we only need to save the GPR to their home
1953 TotalNumIntRegs = 4;
1954 GPR64ArgRegs = GPR64ArgRegsWin64;
1956 TotalNumIntRegs = 6; TotalNumXMMRegs = 8;
1957 GPR64ArgRegs = GPR64ArgRegs64Bit;
1959 NumXMMRegs = CCInfo.getFirstUnallocated(XMMArgRegs64Bit,
1962 unsigned NumIntRegs = CCInfo.getFirstUnallocated(GPR64ArgRegs,
1965 bool NoImplicitFloatOps = Fn->hasFnAttr(Attribute::NoImplicitFloat);
1966 assert(!(NumXMMRegs && !Subtarget->hasSSE1()) &&
1967 "SSE register cannot be used when SSE is disabled!");
1968 assert(!(NumXMMRegs && MF.getTarget().Options.UseSoftFloat &&
1969 NoImplicitFloatOps) &&
1970 "SSE register cannot be used when SSE is disabled!");
1971 if (MF.getTarget().Options.UseSoftFloat || NoImplicitFloatOps ||
1972 !Subtarget->hasSSE1())
1973 // Kernel mode asks for SSE to be disabled, so don't push them
1975 TotalNumXMMRegs = 0;
1978 const TargetFrameLowering &TFI = *getTargetMachine().getFrameLowering();
1979 // Get to the caller-allocated home save location. Add 8 to account
1980 // for the return address.
1981 int HomeOffset = TFI.getOffsetOfLocalArea() + 8;
1982 FuncInfo->setRegSaveFrameIndex(
1983 MFI->CreateFixedObject(1, NumIntRegs * 8 + HomeOffset, false));
1984 // Fixup to set vararg frame on shadow area (4 x i64).
1986 FuncInfo->setVarArgsFrameIndex(FuncInfo->getRegSaveFrameIndex());
1988 // For X86-64, if there are vararg parameters that are passed via
1989 // registers, then we must store them to their spots on the stack so
1990 // they may be loaded by deferencing the result of va_next.
1991 FuncInfo->setVarArgsGPOffset(NumIntRegs * 8);
1992 FuncInfo->setVarArgsFPOffset(TotalNumIntRegs * 8 + NumXMMRegs * 16);
1993 FuncInfo->setRegSaveFrameIndex(
1994 MFI->CreateStackObject(TotalNumIntRegs * 8 + TotalNumXMMRegs * 16, 16,
1998 // Store the integer parameter registers.
1999 SmallVector<SDValue, 8> MemOps;
2000 SDValue RSFIN = DAG.getFrameIndex(FuncInfo->getRegSaveFrameIndex(),
2002 unsigned Offset = FuncInfo->getVarArgsGPOffset();
2003 for (; NumIntRegs != TotalNumIntRegs; ++NumIntRegs) {
2004 SDValue FIN = DAG.getNode(ISD::ADD, dl, getPointerTy(), RSFIN,
2005 DAG.getIntPtrConstant(Offset));
2006 unsigned VReg = MF.addLiveIn(GPR64ArgRegs[NumIntRegs],
2007 X86::GR64RegisterClass);
2008 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i64);
2010 DAG.getStore(Val.getValue(1), dl, Val, FIN,
2011 MachinePointerInfo::getFixedStack(
2012 FuncInfo->getRegSaveFrameIndex(), Offset),
2014 MemOps.push_back(Store);
2018 if (TotalNumXMMRegs != 0 && NumXMMRegs != TotalNumXMMRegs) {
2019 // Now store the XMM (fp + vector) parameter registers.
2020 SmallVector<SDValue, 11> SaveXMMOps;
2021 SaveXMMOps.push_back(Chain);
2023 unsigned AL = MF.addLiveIn(X86::AL, X86::GR8RegisterClass);
2024 SDValue ALVal = DAG.getCopyFromReg(DAG.getEntryNode(), dl, AL, MVT::i8);
2025 SaveXMMOps.push_back(ALVal);
2027 SaveXMMOps.push_back(DAG.getIntPtrConstant(
2028 FuncInfo->getRegSaveFrameIndex()));
2029 SaveXMMOps.push_back(DAG.getIntPtrConstant(
2030 FuncInfo->getVarArgsFPOffset()));
2032 for (; NumXMMRegs != TotalNumXMMRegs; ++NumXMMRegs) {
2033 unsigned VReg = MF.addLiveIn(XMMArgRegs64Bit[NumXMMRegs],
2034 X86::VR128RegisterClass);
2035 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, MVT::v4f32);
2036 SaveXMMOps.push_back(Val);
2038 MemOps.push_back(DAG.getNode(X86ISD::VASTART_SAVE_XMM_REGS, dl,
2040 &SaveXMMOps[0], SaveXMMOps.size()));
2043 if (!MemOps.empty())
2044 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
2045 &MemOps[0], MemOps.size());
2049 // Some CCs need callee pop.
2050 if (X86::isCalleePop(CallConv, Is64Bit, isVarArg,
2051 MF.getTarget().Options.GuaranteedTailCallOpt)) {
2052 FuncInfo->setBytesToPopOnReturn(StackSize); // Callee pops everything.
2054 FuncInfo->setBytesToPopOnReturn(0); // Callee pops nothing.
2055 // If this is an sret function, the return should pop the hidden pointer.
2056 if (!Is64Bit && !IsTailCallConvention(CallConv) && !IsWindows &&
2057 ArgsAreStructReturn(Ins))
2058 FuncInfo->setBytesToPopOnReturn(4);
2062 // RegSaveFrameIndex is X86-64 only.
2063 FuncInfo->setRegSaveFrameIndex(0xAAAAAAA);
2064 if (CallConv == CallingConv::X86_FastCall ||
2065 CallConv == CallingConv::X86_ThisCall)
2066 // fastcc functions can't have varargs.
2067 FuncInfo->setVarArgsFrameIndex(0xAAAAAAA);
2070 FuncInfo->setArgumentStackSize(StackSize);
2076 X86TargetLowering::LowerMemOpCallTo(SDValue Chain,
2077 SDValue StackPtr, SDValue Arg,
2078 DebugLoc dl, SelectionDAG &DAG,
2079 const CCValAssign &VA,
2080 ISD::ArgFlagsTy Flags) const {
2081 unsigned LocMemOffset = VA.getLocMemOffset();
2082 SDValue PtrOff = DAG.getIntPtrConstant(LocMemOffset);
2083 PtrOff = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr, PtrOff);
2084 if (Flags.isByVal())
2085 return CreateCopyOfByValArgument(Arg, PtrOff, Chain, Flags, DAG, dl);
2087 return DAG.getStore(Chain, dl, Arg, PtrOff,
2088 MachinePointerInfo::getStack(LocMemOffset),
2092 /// EmitTailCallLoadRetAddr - Emit a load of return address if tail call
2093 /// optimization is performed and it is required.
2095 X86TargetLowering::EmitTailCallLoadRetAddr(SelectionDAG &DAG,
2096 SDValue &OutRetAddr, SDValue Chain,
2097 bool IsTailCall, bool Is64Bit,
2098 int FPDiff, DebugLoc dl) const {
2099 // Adjust the Return address stack slot.
2100 EVT VT = getPointerTy();
2101 OutRetAddr = getReturnAddressFrameIndex(DAG);
2103 // Load the "old" Return address.
2104 OutRetAddr = DAG.getLoad(VT, dl, Chain, OutRetAddr, MachinePointerInfo(),
2105 false, false, false, 0);
2106 return SDValue(OutRetAddr.getNode(), 1);
2109 /// EmitTailCallStoreRetAddr - Emit a store of the return address if tail call
2110 /// optimization is performed and it is required (FPDiff!=0).
2112 EmitTailCallStoreRetAddr(SelectionDAG & DAG, MachineFunction &MF,
2113 SDValue Chain, SDValue RetAddrFrIdx,
2114 bool Is64Bit, int FPDiff, DebugLoc dl) {
2115 // Store the return address to the appropriate stack slot.
2116 if (!FPDiff) return Chain;
2117 // Calculate the new stack slot for the return address.
2118 int SlotSize = Is64Bit ? 8 : 4;
2119 int NewReturnAddrFI =
2120 MF.getFrameInfo()->CreateFixedObject(SlotSize, FPDiff-SlotSize, false);
2121 EVT VT = Is64Bit ? MVT::i64 : MVT::i32;
2122 SDValue NewRetAddrFrIdx = DAG.getFrameIndex(NewReturnAddrFI, VT);
2123 Chain = DAG.getStore(Chain, dl, RetAddrFrIdx, NewRetAddrFrIdx,
2124 MachinePointerInfo::getFixedStack(NewReturnAddrFI),
2130 X86TargetLowering::LowerCall(SDValue Chain, SDValue Callee,
2131 CallingConv::ID CallConv, bool isVarArg,
2132 bool doesNotRet, bool &isTailCall,
2133 const SmallVectorImpl<ISD::OutputArg> &Outs,
2134 const SmallVectorImpl<SDValue> &OutVals,
2135 const SmallVectorImpl<ISD::InputArg> &Ins,
2136 DebugLoc dl, SelectionDAG &DAG,
2137 SmallVectorImpl<SDValue> &InVals) const {
2138 MachineFunction &MF = DAG.getMachineFunction();
2139 bool Is64Bit = Subtarget->is64Bit();
2140 bool IsWin64 = Subtarget->isTargetWin64();
2141 bool IsWindows = Subtarget->isTargetWindows();
2142 bool IsStructRet = CallIsStructReturn(Outs);
2143 bool IsSibcall = false;
2145 if (MF.getTarget().Options.DisableTailCalls)
2149 // Check if it's really possible to do a tail call.
2150 isTailCall = IsEligibleForTailCallOptimization(Callee, CallConv,
2151 isVarArg, IsStructRet, MF.getFunction()->hasStructRetAttr(),
2152 Outs, OutVals, Ins, DAG);
2154 // Sibcalls are automatically detected tailcalls which do not require
2156 if (!MF.getTarget().Options.GuaranteedTailCallOpt && isTailCall)
2163 assert(!(isVarArg && IsTailCallConvention(CallConv)) &&
2164 "Var args not supported with calling convention fastcc or ghc");
2166 // Analyze operands of the call, assigning locations to each operand.
2167 SmallVector<CCValAssign, 16> ArgLocs;
2168 CCState CCInfo(CallConv, isVarArg, MF, getTargetMachine(),
2169 ArgLocs, *DAG.getContext());
2171 // Allocate shadow area for Win64
2173 CCInfo.AllocateStack(32, 8);
2176 CCInfo.AnalyzeCallOperands(Outs, CC_X86);
2178 // Get a count of how many bytes are to be pushed on the stack.
2179 unsigned NumBytes = CCInfo.getNextStackOffset();
2181 // This is a sibcall. The memory operands are available in caller's
2182 // own caller's stack.
2184 else if (getTargetMachine().Options.GuaranteedTailCallOpt &&
2185 IsTailCallConvention(CallConv))
2186 NumBytes = GetAlignedArgumentStackSize(NumBytes, DAG);
2189 if (isTailCall && !IsSibcall) {
2190 // Lower arguments at fp - stackoffset + fpdiff.
2191 unsigned NumBytesCallerPushed =
2192 MF.getInfo<X86MachineFunctionInfo>()->getBytesToPopOnReturn();
2193 FPDiff = NumBytesCallerPushed - NumBytes;
2195 // Set the delta of movement of the returnaddr stackslot.
2196 // But only set if delta is greater than previous delta.
2197 if (FPDiff < (MF.getInfo<X86MachineFunctionInfo>()->getTCReturnAddrDelta()))
2198 MF.getInfo<X86MachineFunctionInfo>()->setTCReturnAddrDelta(FPDiff);
2202 Chain = DAG.getCALLSEQ_START(Chain, DAG.getIntPtrConstant(NumBytes, true));
2204 SDValue RetAddrFrIdx;
2205 // Load return address for tail calls.
2206 if (isTailCall && FPDiff)
2207 Chain = EmitTailCallLoadRetAddr(DAG, RetAddrFrIdx, Chain, isTailCall,
2208 Is64Bit, FPDiff, dl);
2210 SmallVector<std::pair<unsigned, SDValue>, 8> RegsToPass;
2211 SmallVector<SDValue, 8> MemOpChains;
2214 // Walk the register/memloc assignments, inserting copies/loads. In the case
2215 // of tail call optimization arguments are handle later.
2216 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2217 CCValAssign &VA = ArgLocs[i];
2218 EVT RegVT = VA.getLocVT();
2219 SDValue Arg = OutVals[i];
2220 ISD::ArgFlagsTy Flags = Outs[i].Flags;
2221 bool isByVal = Flags.isByVal();
2223 // Promote the value if needed.
2224 switch (VA.getLocInfo()) {
2225 default: llvm_unreachable("Unknown loc info!");
2226 case CCValAssign::Full: break;
2227 case CCValAssign::SExt:
2228 Arg = DAG.getNode(ISD::SIGN_EXTEND, dl, RegVT, Arg);
2230 case CCValAssign::ZExt:
2231 Arg = DAG.getNode(ISD::ZERO_EXTEND, dl, RegVT, Arg);
2233 case CCValAssign::AExt:
2234 if (RegVT.isVector() && RegVT.getSizeInBits() == 128) {
2235 // Special case: passing MMX values in XMM registers.
2236 Arg = DAG.getNode(ISD::BITCAST, dl, MVT::i64, Arg);
2237 Arg = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2i64, Arg);
2238 Arg = getMOVL(DAG, dl, MVT::v2i64, DAG.getUNDEF(MVT::v2i64), Arg);
2240 Arg = DAG.getNode(ISD::ANY_EXTEND, dl, RegVT, Arg);
2242 case CCValAssign::BCvt:
2243 Arg = DAG.getNode(ISD::BITCAST, dl, RegVT, Arg);
2245 case CCValAssign::Indirect: {
2246 // Store the argument.
2247 SDValue SpillSlot = DAG.CreateStackTemporary(VA.getValVT());
2248 int FI = cast<FrameIndexSDNode>(SpillSlot)->getIndex();
2249 Chain = DAG.getStore(Chain, dl, Arg, SpillSlot,
2250 MachinePointerInfo::getFixedStack(FI),
2257 if (VA.isRegLoc()) {
2258 RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
2259 if (isVarArg && IsWin64) {
2260 // Win64 ABI requires argument XMM reg to be copied to the corresponding
2261 // shadow reg if callee is a varargs function.
2262 unsigned ShadowReg = 0;
2263 switch (VA.getLocReg()) {
2264 case X86::XMM0: ShadowReg = X86::RCX; break;
2265 case X86::XMM1: ShadowReg = X86::RDX; break;
2266 case X86::XMM2: ShadowReg = X86::R8; break;
2267 case X86::XMM3: ShadowReg = X86::R9; break;
2270 RegsToPass.push_back(std::make_pair(ShadowReg, Arg));
2272 } else if (!IsSibcall && (!isTailCall || isByVal)) {
2273 assert(VA.isMemLoc());
2274 if (StackPtr.getNode() == 0)
2275 StackPtr = DAG.getCopyFromReg(Chain, dl, X86StackPtr, getPointerTy());
2276 MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, Arg,
2277 dl, DAG, VA, Flags));
2281 if (!MemOpChains.empty())
2282 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
2283 &MemOpChains[0], MemOpChains.size());
2285 // Build a sequence of copy-to-reg nodes chained together with token chain
2286 // and flag operands which copy the outgoing args into registers.
2288 // Tail call byval lowering might overwrite argument registers so in case of
2289 // tail call optimization the copies to registers are lowered later.
2291 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
2292 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
2293 RegsToPass[i].second, InFlag);
2294 InFlag = Chain.getValue(1);
2297 if (Subtarget->isPICStyleGOT()) {
2298 // ELF / PIC requires GOT in the EBX register before function calls via PLT
2301 Chain = DAG.getCopyToReg(Chain, dl, X86::EBX,
2302 DAG.getNode(X86ISD::GlobalBaseReg,
2303 DebugLoc(), getPointerTy()),
2305 InFlag = Chain.getValue(1);
2307 // If we are tail calling and generating PIC/GOT style code load the
2308 // address of the callee into ECX. The value in ecx is used as target of
2309 // the tail jump. This is done to circumvent the ebx/callee-saved problem
2310 // for tail calls on PIC/GOT architectures. Normally we would just put the
2311 // address of GOT into ebx and then call target@PLT. But for tail calls
2312 // ebx would be restored (since ebx is callee saved) before jumping to the
2315 // Note: The actual moving to ECX is done further down.
2316 GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee);
2317 if (G && !G->getGlobal()->hasHiddenVisibility() &&
2318 !G->getGlobal()->hasProtectedVisibility())
2319 Callee = LowerGlobalAddress(Callee, DAG);
2320 else if (isa<ExternalSymbolSDNode>(Callee))
2321 Callee = LowerExternalSymbol(Callee, DAG);
2325 if (Is64Bit && isVarArg && !IsWin64) {
2326 // From AMD64 ABI document:
2327 // For calls that may call functions that use varargs or stdargs
2328 // (prototype-less calls or calls to functions containing ellipsis (...) in
2329 // the declaration) %al is used as hidden argument to specify the number
2330 // of SSE registers used. The contents of %al do not need to match exactly
2331 // the number of registers, but must be an ubound on the number of SSE
2332 // registers used and is in the range 0 - 8 inclusive.
2334 // Count the number of XMM registers allocated.
2335 static const uint16_t XMMArgRegs[] = {
2336 X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3,
2337 X86::XMM4, X86::XMM5, X86::XMM6, X86::XMM7
2339 unsigned NumXMMRegs = CCInfo.getFirstUnallocated(XMMArgRegs, 8);
2340 assert((Subtarget->hasSSE1() || !NumXMMRegs)
2341 && "SSE registers cannot be used when SSE is disabled");
2343 Chain = DAG.getCopyToReg(Chain, dl, X86::AL,
2344 DAG.getConstant(NumXMMRegs, MVT::i8), InFlag);
2345 InFlag = Chain.getValue(1);
2349 // For tail calls lower the arguments to the 'real' stack slot.
2351 // Force all the incoming stack arguments to be loaded from the stack
2352 // before any new outgoing arguments are stored to the stack, because the
2353 // outgoing stack slots may alias the incoming argument stack slots, and
2354 // the alias isn't otherwise explicit. This is slightly more conservative
2355 // than necessary, because it means that each store effectively depends
2356 // on every argument instead of just those arguments it would clobber.
2357 SDValue ArgChain = DAG.getStackArgumentTokenFactor(Chain);
2359 SmallVector<SDValue, 8> MemOpChains2;
2362 // Do not flag preceding copytoreg stuff together with the following stuff.
2364 if (getTargetMachine().Options.GuaranteedTailCallOpt) {
2365 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2366 CCValAssign &VA = ArgLocs[i];
2369 assert(VA.isMemLoc());
2370 SDValue Arg = OutVals[i];
2371 ISD::ArgFlagsTy Flags = Outs[i].Flags;
2372 // Create frame index.
2373 int32_t Offset = VA.getLocMemOffset()+FPDiff;
2374 uint32_t OpSize = (VA.getLocVT().getSizeInBits()+7)/8;
2375 FI = MF.getFrameInfo()->CreateFixedObject(OpSize, Offset, true);
2376 FIN = DAG.getFrameIndex(FI, getPointerTy());
2378 if (Flags.isByVal()) {
2379 // Copy relative to framepointer.
2380 SDValue Source = DAG.getIntPtrConstant(VA.getLocMemOffset());
2381 if (StackPtr.getNode() == 0)
2382 StackPtr = DAG.getCopyFromReg(Chain, dl, X86StackPtr,
2384 Source = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr, Source);
2386 MemOpChains2.push_back(CreateCopyOfByValArgument(Source, FIN,
2390 // Store relative to framepointer.
2391 MemOpChains2.push_back(
2392 DAG.getStore(ArgChain, dl, Arg, FIN,
2393 MachinePointerInfo::getFixedStack(FI),
2399 if (!MemOpChains2.empty())
2400 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
2401 &MemOpChains2[0], MemOpChains2.size());
2403 // Copy arguments to their registers.
2404 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
2405 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
2406 RegsToPass[i].second, InFlag);
2407 InFlag = Chain.getValue(1);
2411 // Store the return address to the appropriate stack slot.
2412 Chain = EmitTailCallStoreRetAddr(DAG, MF, Chain, RetAddrFrIdx, Is64Bit,
2416 if (getTargetMachine().getCodeModel() == CodeModel::Large) {
2417 assert(Is64Bit && "Large code model is only legal in 64-bit mode.");
2418 // In the 64-bit large code model, we have to make all calls
2419 // through a register, since the call instruction's 32-bit
2420 // pc-relative offset may not be large enough to hold the whole
2422 } else if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
2423 // If the callee is a GlobalAddress node (quite common, every direct call
2424 // is) turn it into a TargetGlobalAddress node so that legalize doesn't hack
2427 // We should use extra load for direct calls to dllimported functions in
2429 const GlobalValue *GV = G->getGlobal();
2430 if (!GV->hasDLLImportLinkage()) {
2431 unsigned char OpFlags = 0;
2432 bool ExtraLoad = false;
2433 unsigned WrapperKind = ISD::DELETED_NODE;
2435 // On ELF targets, in both X86-64 and X86-32 mode, direct calls to
2436 // external symbols most go through the PLT in PIC mode. If the symbol
2437 // has hidden or protected visibility, or if it is static or local, then
2438 // we don't need to use the PLT - we can directly call it.
2439 if (Subtarget->isTargetELF() &&
2440 getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
2441 GV->hasDefaultVisibility() && !GV->hasLocalLinkage()) {
2442 OpFlags = X86II::MO_PLT;
2443 } else if (Subtarget->isPICStyleStubAny() &&
2444 (GV->isDeclaration() || GV->isWeakForLinker()) &&
2445 (!Subtarget->getTargetTriple().isMacOSX() ||
2446 Subtarget->getTargetTriple().isMacOSXVersionLT(10, 5))) {
2447 // PC-relative references to external symbols should go through $stub,
2448 // unless we're building with the leopard linker or later, which
2449 // automatically synthesizes these stubs.
2450 OpFlags = X86II::MO_DARWIN_STUB;
2451 } else if (Subtarget->isPICStyleRIPRel() &&
2452 isa<Function>(GV) &&
2453 cast<Function>(GV)->hasFnAttr(Attribute::NonLazyBind)) {
2454 // If the function is marked as non-lazy, generate an indirect call
2455 // which loads from the GOT directly. This avoids runtime overhead
2456 // at the cost of eager binding (and one extra byte of encoding).
2457 OpFlags = X86II::MO_GOTPCREL;
2458 WrapperKind = X86ISD::WrapperRIP;
2462 Callee = DAG.getTargetGlobalAddress(GV, dl, getPointerTy(),
2463 G->getOffset(), OpFlags);
2465 // Add a wrapper if needed.
2466 if (WrapperKind != ISD::DELETED_NODE)
2467 Callee = DAG.getNode(X86ISD::WrapperRIP, dl, getPointerTy(), Callee);
2468 // Add extra indirection if needed.
2470 Callee = DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(), Callee,
2471 MachinePointerInfo::getGOT(),
2472 false, false, false, 0);
2474 } else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) {
2475 unsigned char OpFlags = 0;
2477 // On ELF targets, in either X86-64 or X86-32 mode, direct calls to
2478 // external symbols should go through the PLT.
2479 if (Subtarget->isTargetELF() &&
2480 getTargetMachine().getRelocationModel() == Reloc::PIC_) {
2481 OpFlags = X86II::MO_PLT;
2482 } else if (Subtarget->isPICStyleStubAny() &&
2483 (!Subtarget->getTargetTriple().isMacOSX() ||
2484 Subtarget->getTargetTriple().isMacOSXVersionLT(10, 5))) {
2485 // PC-relative references to external symbols should go through $stub,
2486 // unless we're building with the leopard linker or later, which
2487 // automatically synthesizes these stubs.
2488 OpFlags = X86II::MO_DARWIN_STUB;
2491 Callee = DAG.getTargetExternalSymbol(S->getSymbol(), getPointerTy(),
2495 // Returns a chain & a flag for retval copy to use.
2496 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
2497 SmallVector<SDValue, 8> Ops;
2499 if (!IsSibcall && isTailCall) {
2500 Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(NumBytes, true),
2501 DAG.getIntPtrConstant(0, true), InFlag);
2502 InFlag = Chain.getValue(1);
2505 Ops.push_back(Chain);
2506 Ops.push_back(Callee);
2509 Ops.push_back(DAG.getConstant(FPDiff, MVT::i32));
2511 // Add argument registers to the end of the list so that they are known live
2513 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
2514 Ops.push_back(DAG.getRegister(RegsToPass[i].first,
2515 RegsToPass[i].second.getValueType()));
2517 // Add an implicit use GOT pointer in EBX.
2518 if (!isTailCall && Subtarget->isPICStyleGOT())
2519 Ops.push_back(DAG.getRegister(X86::EBX, getPointerTy()));
2521 // Add an implicit use of AL for non-Windows x86 64-bit vararg functions.
2522 if (Is64Bit && isVarArg && !IsWin64)
2523 Ops.push_back(DAG.getRegister(X86::AL, MVT::i8));
2525 // Add a register mask operand representing the call-preserved registers.
2526 const TargetRegisterInfo *TRI = getTargetMachine().getRegisterInfo();
2527 const uint32_t *Mask = TRI->getCallPreservedMask(CallConv);
2528 assert(Mask && "Missing call preserved mask for calling convention");
2529 Ops.push_back(DAG.getRegisterMask(Mask));
2531 if (InFlag.getNode())
2532 Ops.push_back(InFlag);
2536 //// If this is the first return lowered for this function, add the regs
2537 //// to the liveout set for the function.
2538 // This isn't right, although it's probably harmless on x86; liveouts
2539 // should be computed from returns not tail calls. Consider a void
2540 // function making a tail call to a function returning int.
2541 return DAG.getNode(X86ISD::TC_RETURN, dl,
2542 NodeTys, &Ops[0], Ops.size());
2545 Chain = DAG.getNode(X86ISD::CALL, dl, NodeTys, &Ops[0], Ops.size());
2546 InFlag = Chain.getValue(1);
2548 // Create the CALLSEQ_END node.
2549 unsigned NumBytesForCalleeToPush;
2550 if (X86::isCalleePop(CallConv, Is64Bit, isVarArg,
2551 getTargetMachine().Options.GuaranteedTailCallOpt))
2552 NumBytesForCalleeToPush = NumBytes; // Callee pops everything
2553 else if (!Is64Bit && !IsTailCallConvention(CallConv) && !IsWindows &&
2555 // If this is a call to a struct-return function, the callee
2556 // pops the hidden struct pointer, so we have to push it back.
2557 // This is common for Darwin/X86, Linux & Mingw32 targets.
2558 // For MSVC Win32 targets, the caller pops the hidden struct pointer.
2559 NumBytesForCalleeToPush = 4;
2561 NumBytesForCalleeToPush = 0; // Callee pops nothing.
2563 // Returns a flag for retval copy to use.
2565 Chain = DAG.getCALLSEQ_END(Chain,
2566 DAG.getIntPtrConstant(NumBytes, true),
2567 DAG.getIntPtrConstant(NumBytesForCalleeToPush,
2570 InFlag = Chain.getValue(1);
2573 // Handle result values, copying them out of physregs into vregs that we
2575 return LowerCallResult(Chain, InFlag, CallConv, isVarArg,
2576 Ins, dl, DAG, InVals);
2580 //===----------------------------------------------------------------------===//
2581 // Fast Calling Convention (tail call) implementation
2582 //===----------------------------------------------------------------------===//
2584 // Like std call, callee cleans arguments, convention except that ECX is
2585 // reserved for storing the tail called function address. Only 2 registers are
2586 // free for argument passing (inreg). Tail call optimization is performed
2588 // * tailcallopt is enabled
2589 // * caller/callee are fastcc
2590 // On X86_64 architecture with GOT-style position independent code only local
2591 // (within module) calls are supported at the moment.
2592 // To keep the stack aligned according to platform abi the function
2593 // GetAlignedArgumentStackSize ensures that argument delta is always multiples
2594 // of stack alignment. (Dynamic linkers need this - darwin's dyld for example)
2595 // If a tail called function callee has more arguments than the caller the
2596 // caller needs to make sure that there is room to move the RETADDR to. This is
2597 // achieved by reserving an area the size of the argument delta right after the
2598 // original REtADDR, but before the saved framepointer or the spilled registers
2599 // e.g. caller(arg1, arg2) calls callee(arg1, arg2,arg3,arg4)
2611 /// GetAlignedArgumentStackSize - Make the stack size align e.g 16n + 12 aligned
2612 /// for a 16 byte align requirement.
2614 X86TargetLowering::GetAlignedArgumentStackSize(unsigned StackSize,
2615 SelectionDAG& DAG) const {
2616 MachineFunction &MF = DAG.getMachineFunction();
2617 const TargetMachine &TM = MF.getTarget();
2618 const TargetFrameLowering &TFI = *TM.getFrameLowering();
2619 unsigned StackAlignment = TFI.getStackAlignment();
2620 uint64_t AlignMask = StackAlignment - 1;
2621 int64_t Offset = StackSize;
2622 uint64_t SlotSize = TD->getPointerSize();
2623 if ( (Offset & AlignMask) <= (StackAlignment - SlotSize) ) {
2624 // Number smaller than 12 so just add the difference.
2625 Offset += ((StackAlignment - SlotSize) - (Offset & AlignMask));
2627 // Mask out lower bits, add stackalignment once plus the 12 bytes.
2628 Offset = ((~AlignMask) & Offset) + StackAlignment +
2629 (StackAlignment-SlotSize);
2634 /// MatchingStackOffset - Return true if the given stack call argument is
2635 /// already available in the same position (relatively) of the caller's
2636 /// incoming argument stack.
2638 bool MatchingStackOffset(SDValue Arg, unsigned Offset, ISD::ArgFlagsTy Flags,
2639 MachineFrameInfo *MFI, const MachineRegisterInfo *MRI,
2640 const X86InstrInfo *TII) {
2641 unsigned Bytes = Arg.getValueType().getSizeInBits() / 8;
2643 if (Arg.getOpcode() == ISD::CopyFromReg) {
2644 unsigned VR = cast<RegisterSDNode>(Arg.getOperand(1))->getReg();
2645 if (!TargetRegisterInfo::isVirtualRegister(VR))
2647 MachineInstr *Def = MRI->getVRegDef(VR);
2650 if (!Flags.isByVal()) {
2651 if (!TII->isLoadFromStackSlot(Def, FI))
2654 unsigned Opcode = Def->getOpcode();
2655 if ((Opcode == X86::LEA32r || Opcode == X86::LEA64r) &&
2656 Def->getOperand(1).isFI()) {
2657 FI = Def->getOperand(1).getIndex();
2658 Bytes = Flags.getByValSize();
2662 } else if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Arg)) {
2663 if (Flags.isByVal())
2664 // ByVal argument is passed in as a pointer but it's now being
2665 // dereferenced. e.g.
2666 // define @foo(%struct.X* %A) {
2667 // tail call @bar(%struct.X* byval %A)
2670 SDValue Ptr = Ld->getBasePtr();
2671 FrameIndexSDNode *FINode = dyn_cast<FrameIndexSDNode>(Ptr);
2674 FI = FINode->getIndex();
2675 } else if (Arg.getOpcode() == ISD::FrameIndex && Flags.isByVal()) {
2676 FrameIndexSDNode *FINode = cast<FrameIndexSDNode>(Arg);
2677 FI = FINode->getIndex();
2678 Bytes = Flags.getByValSize();
2682 assert(FI != INT_MAX);
2683 if (!MFI->isFixedObjectIndex(FI))
2685 return Offset == MFI->getObjectOffset(FI) && Bytes == MFI->getObjectSize(FI);
2688 /// IsEligibleForTailCallOptimization - Check whether the call is eligible
2689 /// for tail call optimization. Targets which want to do tail call
2690 /// optimization should implement this function.
2692 X86TargetLowering::IsEligibleForTailCallOptimization(SDValue Callee,
2693 CallingConv::ID CalleeCC,
2695 bool isCalleeStructRet,
2696 bool isCallerStructRet,
2697 const SmallVectorImpl<ISD::OutputArg> &Outs,
2698 const SmallVectorImpl<SDValue> &OutVals,
2699 const SmallVectorImpl<ISD::InputArg> &Ins,
2700 SelectionDAG& DAG) const {
2701 if (!IsTailCallConvention(CalleeCC) &&
2702 CalleeCC != CallingConv::C)
2705 // If -tailcallopt is specified, make fastcc functions tail-callable.
2706 const MachineFunction &MF = DAG.getMachineFunction();
2707 const Function *CallerF = DAG.getMachineFunction().getFunction();
2708 CallingConv::ID CallerCC = CallerF->getCallingConv();
2709 bool CCMatch = CallerCC == CalleeCC;
2711 if (getTargetMachine().Options.GuaranteedTailCallOpt) {
2712 if (IsTailCallConvention(CalleeCC) && CCMatch)
2717 // Look for obvious safe cases to perform tail call optimization that do not
2718 // require ABI changes. This is what gcc calls sibcall.
2720 // Can't do sibcall if stack needs to be dynamically re-aligned. PEI needs to
2721 // emit a special epilogue.
2722 if (RegInfo->needsStackRealignment(MF))
2725 // Also avoid sibcall optimization if either caller or callee uses struct
2726 // return semantics.
2727 if (isCalleeStructRet || isCallerStructRet)
2730 // An stdcall caller is expected to clean up its arguments; the callee
2731 // isn't going to do that.
2732 if (!CCMatch && CallerCC==CallingConv::X86_StdCall)
2735 // Do not sibcall optimize vararg calls unless all arguments are passed via
2737 if (isVarArg && !Outs.empty()) {
2739 // Optimizing for varargs on Win64 is unlikely to be safe without
2740 // additional testing.
2741 if (Subtarget->isTargetWin64())
2744 SmallVector<CCValAssign, 16> ArgLocs;
2745 CCState CCInfo(CalleeCC, isVarArg, DAG.getMachineFunction(),
2746 getTargetMachine(), ArgLocs, *DAG.getContext());
2748 CCInfo.AnalyzeCallOperands(Outs, CC_X86);
2749 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i)
2750 if (!ArgLocs[i].isRegLoc())
2754 // If the call result is in ST0 / ST1, it needs to be popped off the x87
2755 // stack. Therefore, if it's not used by the call it is not safe to optimize
2756 // this into a sibcall.
2757 bool Unused = false;
2758 for (unsigned i = 0, e = Ins.size(); i != e; ++i) {
2765 SmallVector<CCValAssign, 16> RVLocs;
2766 CCState CCInfo(CalleeCC, false, DAG.getMachineFunction(),
2767 getTargetMachine(), RVLocs, *DAG.getContext());
2768 CCInfo.AnalyzeCallResult(Ins, RetCC_X86);
2769 for (unsigned i = 0, e = RVLocs.size(); i != e; ++i) {
2770 CCValAssign &VA = RVLocs[i];
2771 if (VA.getLocReg() == X86::ST0 || VA.getLocReg() == X86::ST1)
2776 // If the calling conventions do not match, then we'd better make sure the
2777 // results are returned in the same way as what the caller expects.
2779 SmallVector<CCValAssign, 16> RVLocs1;
2780 CCState CCInfo1(CalleeCC, false, DAG.getMachineFunction(),
2781 getTargetMachine(), RVLocs1, *DAG.getContext());
2782 CCInfo1.AnalyzeCallResult(Ins, RetCC_X86);
2784 SmallVector<CCValAssign, 16> RVLocs2;
2785 CCState CCInfo2(CallerCC, false, DAG.getMachineFunction(),
2786 getTargetMachine(), RVLocs2, *DAG.getContext());
2787 CCInfo2.AnalyzeCallResult(Ins, RetCC_X86);
2789 if (RVLocs1.size() != RVLocs2.size())
2791 for (unsigned i = 0, e = RVLocs1.size(); i != e; ++i) {
2792 if (RVLocs1[i].isRegLoc() != RVLocs2[i].isRegLoc())
2794 if (RVLocs1[i].getLocInfo() != RVLocs2[i].getLocInfo())
2796 if (RVLocs1[i].isRegLoc()) {
2797 if (RVLocs1[i].getLocReg() != RVLocs2[i].getLocReg())
2800 if (RVLocs1[i].getLocMemOffset() != RVLocs2[i].getLocMemOffset())
2806 // If the callee takes no arguments then go on to check the results of the
2808 if (!Outs.empty()) {
2809 // Check if stack adjustment is needed. For now, do not do this if any
2810 // argument is passed on the stack.
2811 SmallVector<CCValAssign, 16> ArgLocs;
2812 CCState CCInfo(CalleeCC, isVarArg, DAG.getMachineFunction(),
2813 getTargetMachine(), ArgLocs, *DAG.getContext());
2815 // Allocate shadow area for Win64
2816 if (Subtarget->isTargetWin64()) {
2817 CCInfo.AllocateStack(32, 8);
2820 CCInfo.AnalyzeCallOperands(Outs, CC_X86);
2821 if (CCInfo.getNextStackOffset()) {
2822 MachineFunction &MF = DAG.getMachineFunction();
2823 if (MF.getInfo<X86MachineFunctionInfo>()->getBytesToPopOnReturn())
2826 // Check if the arguments are already laid out in the right way as
2827 // the caller's fixed stack objects.
2828 MachineFrameInfo *MFI = MF.getFrameInfo();
2829 const MachineRegisterInfo *MRI = &MF.getRegInfo();
2830 const X86InstrInfo *TII =
2831 ((X86TargetMachine&)getTargetMachine()).getInstrInfo();
2832 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2833 CCValAssign &VA = ArgLocs[i];
2834 SDValue Arg = OutVals[i];
2835 ISD::ArgFlagsTy Flags = Outs[i].Flags;
2836 if (VA.getLocInfo() == CCValAssign::Indirect)
2838 if (!VA.isRegLoc()) {
2839 if (!MatchingStackOffset(Arg, VA.getLocMemOffset(), Flags,
2846 // If the tailcall address may be in a register, then make sure it's
2847 // possible to register allocate for it. In 32-bit, the call address can
2848 // only target EAX, EDX, or ECX since the tail call must be scheduled after
2849 // callee-saved registers are restored. These happen to be the same
2850 // registers used to pass 'inreg' arguments so watch out for those.
2851 if (!Subtarget->is64Bit() &&
2852 !isa<GlobalAddressSDNode>(Callee) &&
2853 !isa<ExternalSymbolSDNode>(Callee)) {
2854 unsigned NumInRegs = 0;
2855 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2856 CCValAssign &VA = ArgLocs[i];
2859 unsigned Reg = VA.getLocReg();
2862 case X86::EAX: case X86::EDX: case X86::ECX:
2863 if (++NumInRegs == 3)
2875 X86TargetLowering::createFastISel(FunctionLoweringInfo &funcInfo) const {
2876 return X86::createFastISel(funcInfo);
2880 //===----------------------------------------------------------------------===//
2881 // Other Lowering Hooks
2882 //===----------------------------------------------------------------------===//
2884 static bool MayFoldLoad(SDValue Op) {
2885 return Op.hasOneUse() && ISD::isNormalLoad(Op.getNode());
2888 static bool MayFoldIntoStore(SDValue Op) {
2889 return Op.hasOneUse() && ISD::isNormalStore(*Op.getNode()->use_begin());
2892 static bool isTargetShuffle(unsigned Opcode) {
2894 default: return false;
2895 case X86ISD::PSHUFD:
2896 case X86ISD::PSHUFHW:
2897 case X86ISD::PSHUFLW:
2899 case X86ISD::PALIGN:
2900 case X86ISD::MOVLHPS:
2901 case X86ISD::MOVLHPD:
2902 case X86ISD::MOVHLPS:
2903 case X86ISD::MOVLPS:
2904 case X86ISD::MOVLPD:
2905 case X86ISD::MOVSHDUP:
2906 case X86ISD::MOVSLDUP:
2907 case X86ISD::MOVDDUP:
2910 case X86ISD::UNPCKL:
2911 case X86ISD::UNPCKH:
2912 case X86ISD::VPERMILP:
2913 case X86ISD::VPERM2X128:
2918 static SDValue getTargetShuffleNode(unsigned Opc, DebugLoc dl, EVT VT,
2919 SDValue V1, SelectionDAG &DAG) {
2921 default: llvm_unreachable("Unknown x86 shuffle node");
2922 case X86ISD::MOVSHDUP:
2923 case X86ISD::MOVSLDUP:
2924 case X86ISD::MOVDDUP:
2925 return DAG.getNode(Opc, dl, VT, V1);
2929 static SDValue getTargetShuffleNode(unsigned Opc, DebugLoc dl, EVT VT,
2930 SDValue V1, unsigned TargetMask,
2931 SelectionDAG &DAG) {
2933 default: llvm_unreachable("Unknown x86 shuffle node");
2934 case X86ISD::PSHUFD:
2935 case X86ISD::PSHUFHW:
2936 case X86ISD::PSHUFLW:
2937 case X86ISD::VPERMILP:
2938 case X86ISD::VPERMI:
2939 return DAG.getNode(Opc, dl, VT, V1, DAG.getConstant(TargetMask, MVT::i8));
2943 static SDValue getTargetShuffleNode(unsigned Opc, DebugLoc dl, EVT VT,
2944 SDValue V1, SDValue V2, unsigned TargetMask,
2945 SelectionDAG &DAG) {
2947 default: llvm_unreachable("Unknown x86 shuffle node");
2948 case X86ISD::PALIGN:
2950 case X86ISD::VPERM2X128:
2951 return DAG.getNode(Opc, dl, VT, V1, V2,
2952 DAG.getConstant(TargetMask, MVT::i8));
2956 static SDValue getTargetShuffleNode(unsigned Opc, DebugLoc dl, EVT VT,
2957 SDValue V1, SDValue V2, SelectionDAG &DAG) {
2959 default: llvm_unreachable("Unknown x86 shuffle node");
2960 case X86ISD::MOVLHPS:
2961 case X86ISD::MOVLHPD:
2962 case X86ISD::MOVHLPS:
2963 case X86ISD::MOVLPS:
2964 case X86ISD::MOVLPD:
2967 case X86ISD::UNPCKL:
2968 case X86ISD::UNPCKH:
2969 return DAG.getNode(Opc, dl, VT, V1, V2);
2973 SDValue X86TargetLowering::getReturnAddressFrameIndex(SelectionDAG &DAG) const {
2974 MachineFunction &MF = DAG.getMachineFunction();
2975 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
2976 int ReturnAddrIndex = FuncInfo->getRAIndex();
2978 if (ReturnAddrIndex == 0) {
2979 // Set up a frame object for the return address.
2980 uint64_t SlotSize = TD->getPointerSize();
2981 ReturnAddrIndex = MF.getFrameInfo()->CreateFixedObject(SlotSize, -SlotSize,
2983 FuncInfo->setRAIndex(ReturnAddrIndex);
2986 return DAG.getFrameIndex(ReturnAddrIndex, getPointerTy());
2990 bool X86::isOffsetSuitableForCodeModel(int64_t Offset, CodeModel::Model M,
2991 bool hasSymbolicDisplacement) {
2992 // Offset should fit into 32 bit immediate field.
2993 if (!isInt<32>(Offset))
2996 // If we don't have a symbolic displacement - we don't have any extra
2998 if (!hasSymbolicDisplacement)
3001 // FIXME: Some tweaks might be needed for medium code model.
3002 if (M != CodeModel::Small && M != CodeModel::Kernel)
3005 // For small code model we assume that latest object is 16MB before end of 31
3006 // bits boundary. We may also accept pretty large negative constants knowing
3007 // that all objects are in the positive half of address space.
3008 if (M == CodeModel::Small && Offset < 16*1024*1024)
3011 // For kernel code model we know that all object resist in the negative half
3012 // of 32bits address space. We may not accept negative offsets, since they may
3013 // be just off and we may accept pretty large positive ones.
3014 if (M == CodeModel::Kernel && Offset > 0)
3020 /// isCalleePop - Determines whether the callee is required to pop its
3021 /// own arguments. Callee pop is necessary to support tail calls.
3022 bool X86::isCalleePop(CallingConv::ID CallingConv,
3023 bool is64Bit, bool IsVarArg, bool TailCallOpt) {
3027 switch (CallingConv) {
3030 case CallingConv::X86_StdCall:
3032 case CallingConv::X86_FastCall:
3034 case CallingConv::X86_ThisCall:
3036 case CallingConv::Fast:
3038 case CallingConv::GHC:
3043 /// TranslateX86CC - do a one to one translation of a ISD::CondCode to the X86
3044 /// specific condition code, returning the condition code and the LHS/RHS of the
3045 /// comparison to make.
3046 static unsigned TranslateX86CC(ISD::CondCode SetCCOpcode, bool isFP,
3047 SDValue &LHS, SDValue &RHS, SelectionDAG &DAG) {
3049 if (ConstantSDNode *RHSC = dyn_cast<ConstantSDNode>(RHS)) {
3050 if (SetCCOpcode == ISD::SETGT && RHSC->isAllOnesValue()) {
3051 // X > -1 -> X == 0, jump !sign.
3052 RHS = DAG.getConstant(0, RHS.getValueType());
3053 return X86::COND_NS;
3054 } else if (SetCCOpcode == ISD::SETLT && RHSC->isNullValue()) {
3055 // X < 0 -> X == 0, jump on sign.
3057 } else if (SetCCOpcode == ISD::SETLT && RHSC->getZExtValue() == 1) {
3059 RHS = DAG.getConstant(0, RHS.getValueType());
3060 return X86::COND_LE;
3064 switch (SetCCOpcode) {
3065 default: llvm_unreachable("Invalid integer condition!");
3066 case ISD::SETEQ: return X86::COND_E;
3067 case ISD::SETGT: return X86::COND_G;
3068 case ISD::SETGE: return X86::COND_GE;
3069 case ISD::SETLT: return X86::COND_L;
3070 case ISD::SETLE: return X86::COND_LE;
3071 case ISD::SETNE: return X86::COND_NE;
3072 case ISD::SETULT: return X86::COND_B;
3073 case ISD::SETUGT: return X86::COND_A;
3074 case ISD::SETULE: return X86::COND_BE;
3075 case ISD::SETUGE: return X86::COND_AE;
3079 // First determine if it is required or is profitable to flip the operands.
3081 // If LHS is a foldable load, but RHS is not, flip the condition.
3082 if (ISD::isNON_EXTLoad(LHS.getNode()) &&
3083 !ISD::isNON_EXTLoad(RHS.getNode())) {
3084 SetCCOpcode = getSetCCSwappedOperands(SetCCOpcode);
3085 std::swap(LHS, RHS);
3088 switch (SetCCOpcode) {
3094 std::swap(LHS, RHS);
3098 // On a floating point condition, the flags are set as follows:
3100 // 0 | 0 | 0 | X > Y
3101 // 0 | 0 | 1 | X < Y
3102 // 1 | 0 | 0 | X == Y
3103 // 1 | 1 | 1 | unordered
3104 switch (SetCCOpcode) {
3105 default: llvm_unreachable("Condcode should be pre-legalized away");
3107 case ISD::SETEQ: return X86::COND_E;
3108 case ISD::SETOLT: // flipped
3110 case ISD::SETGT: return X86::COND_A;
3111 case ISD::SETOLE: // flipped
3113 case ISD::SETGE: return X86::COND_AE;
3114 case ISD::SETUGT: // flipped
3116 case ISD::SETLT: return X86::COND_B;
3117 case ISD::SETUGE: // flipped
3119 case ISD::SETLE: return X86::COND_BE;
3121 case ISD::SETNE: return X86::COND_NE;
3122 case ISD::SETUO: return X86::COND_P;
3123 case ISD::SETO: return X86::COND_NP;
3125 case ISD::SETUNE: return X86::COND_INVALID;
3129 /// hasFPCMov - is there a floating point cmov for the specific X86 condition
3130 /// code. Current x86 isa includes the following FP cmov instructions:
3131 /// fcmovb, fcomvbe, fcomve, fcmovu, fcmovae, fcmova, fcmovne, fcmovnu.
3132 static bool hasFPCMov(unsigned X86CC) {
3148 /// isFPImmLegal - Returns true if the target can instruction select the
3149 /// specified FP immediate natively. If false, the legalizer will
3150 /// materialize the FP immediate as a load from a constant pool.
3151 bool X86TargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT) const {
3152 for (unsigned i = 0, e = LegalFPImmediates.size(); i != e; ++i) {
3153 if (Imm.bitwiseIsEqual(LegalFPImmediates[i]))
3159 /// isUndefOrInRange - Return true if Val is undef or if its value falls within
3160 /// the specified range (L, H].
3161 static bool isUndefOrInRange(int Val, int Low, int Hi) {
3162 return (Val < 0) || (Val >= Low && Val < Hi);
3165 /// isUndefOrEqual - Val is either less than zero (undef) or equal to the
3166 /// specified value.
3167 static bool isUndefOrEqual(int Val, int CmpVal) {
3168 if (Val < 0 || Val == CmpVal)
3173 /// isSequentialOrUndefInRange - Return true if every element in Mask, begining
3174 /// from position Pos and ending in Pos+Size, falls within the specified
3175 /// sequential range (L, L+Pos]. or is undef.
3176 static bool isSequentialOrUndefInRange(ArrayRef<int> Mask,
3177 int Pos, int Size, int Low) {
3178 for (int i = Pos, e = Pos+Size; i != e; ++i, ++Low)
3179 if (!isUndefOrEqual(Mask[i], Low))
3184 /// isPSHUFDMask - Return true if the node specifies a shuffle of elements that
3185 /// is suitable for input to PSHUFD or PSHUFW. That is, it doesn't reference
3186 /// the second operand.
3187 static bool isPSHUFDMask(ArrayRef<int> Mask, EVT VT) {
3188 if (VT == MVT::v4f32 || VT == MVT::v4i32 )
3189 return (Mask[0] < 4 && Mask[1] < 4 && Mask[2] < 4 && Mask[3] < 4);
3190 if (VT == MVT::v2f64 || VT == MVT::v2i64)
3191 return (Mask[0] < 2 && Mask[1] < 2);
3195 /// isPSHUFHWMask - Return true if the node specifies a shuffle of elements that
3196 /// is suitable for input to PSHUFHW.
3197 static bool isPSHUFHWMask(ArrayRef<int> Mask, EVT VT) {
3198 if (VT != MVT::v8i16)
3201 // Lower quadword copied in order or undef.
3202 if (!isSequentialOrUndefInRange(Mask, 0, 4, 0))
3205 // Upper quadword shuffled.
3206 for (unsigned i = 4; i != 8; ++i)
3207 if (Mask[i] >= 0 && (Mask[i] < 4 || Mask[i] > 7))
3213 /// isPSHUFLWMask - Return true if the node specifies a shuffle of elements that
3214 /// is suitable for input to PSHUFLW.
3215 static bool isPSHUFLWMask(ArrayRef<int> Mask, EVT VT) {
3216 if (VT != MVT::v8i16)
3219 // Upper quadword copied in order.
3220 if (!isSequentialOrUndefInRange(Mask, 4, 4, 4))
3223 // Lower quadword shuffled.
3224 for (unsigned i = 0; i != 4; ++i)
3231 /// isPALIGNRMask - Return true if the node specifies a shuffle of elements that
3232 /// is suitable for input to PALIGNR.
3233 static bool isPALIGNRMask(ArrayRef<int> Mask, EVT VT,
3234 const X86Subtarget *Subtarget) {
3235 if ((VT.getSizeInBits() == 128 && !Subtarget->hasSSSE3()) ||
3236 (VT.getSizeInBits() == 256 && !Subtarget->hasAVX2()))
3239 unsigned NumElts = VT.getVectorNumElements();
3240 unsigned NumLanes = VT.getSizeInBits()/128;
3241 unsigned NumLaneElts = NumElts/NumLanes;
3243 // Do not handle 64-bit element shuffles with palignr.
3244 if (NumLaneElts == 2)
3247 for (unsigned l = 0; l != NumElts; l+=NumLaneElts) {
3249 for (i = 0; i != NumLaneElts; ++i) {
3254 // Lane is all undef, go to next lane
3255 if (i == NumLaneElts)
3258 int Start = Mask[i+l];
3260 // Make sure its in this lane in one of the sources
3261 if (!isUndefOrInRange(Start, l, l+NumLaneElts) &&
3262 !isUndefOrInRange(Start, l+NumElts, l+NumElts+NumLaneElts))
3265 // If not lane 0, then we must match lane 0
3266 if (l != 0 && Mask[i] >= 0 && !isUndefOrEqual(Start, Mask[i]+l))
3269 // Correct second source to be contiguous with first source
3270 if (Start >= (int)NumElts)
3271 Start -= NumElts - NumLaneElts;
3273 // Make sure we're shifting in the right direction.
3274 if (Start <= (int)(i+l))
3279 // Check the rest of the elements to see if they are consecutive.
3280 for (++i; i != NumLaneElts; ++i) {
3281 int Idx = Mask[i+l];
3283 // Make sure its in this lane
3284 if (!isUndefOrInRange(Idx, l, l+NumLaneElts) &&
3285 !isUndefOrInRange(Idx, l+NumElts, l+NumElts+NumLaneElts))
3288 // If not lane 0, then we must match lane 0
3289 if (l != 0 && Mask[i] >= 0 && !isUndefOrEqual(Idx, Mask[i]+l))
3292 if (Idx >= (int)NumElts)
3293 Idx -= NumElts - NumLaneElts;
3295 if (!isUndefOrEqual(Idx, Start+i))
3304 /// CommuteVectorShuffleMask - Change values in a shuffle permute mask assuming
3305 /// the two vector operands have swapped position.
3306 static void CommuteVectorShuffleMask(SmallVectorImpl<int> &Mask,
3307 unsigned NumElems) {
3308 for (unsigned i = 0; i != NumElems; ++i) {
3312 else if (idx < (int)NumElems)
3313 Mask[i] = idx + NumElems;
3315 Mask[i] = idx - NumElems;
3319 /// isSHUFPMask - Return true if the specified VECTOR_SHUFFLE operand
3320 /// specifies a shuffle of elements that is suitable for input to 128/256-bit
3321 /// SHUFPS and SHUFPD. If Commuted is true, then it checks for sources to be
3322 /// reverse of what x86 shuffles want.
3323 static bool isSHUFPMask(ArrayRef<int> Mask, EVT VT, bool HasAVX,
3324 bool Commuted = false) {
3325 if (!HasAVX && VT.getSizeInBits() == 256)
3328 unsigned NumElems = VT.getVectorNumElements();
3329 unsigned NumLanes = VT.getSizeInBits()/128;
3330 unsigned NumLaneElems = NumElems/NumLanes;
3332 if (NumLaneElems != 2 && NumLaneElems != 4)
3335 // VSHUFPSY divides the resulting vector into 4 chunks.
3336 // The sources are also splitted into 4 chunks, and each destination
3337 // chunk must come from a different source chunk.
3339 // SRC1 => X7 X6 X5 X4 X3 X2 X1 X0
3340 // SRC2 => Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y9
3342 // DST => Y7..Y4, Y7..Y4, X7..X4, X7..X4,
3343 // Y3..Y0, Y3..Y0, X3..X0, X3..X0
3345 // VSHUFPDY divides the resulting vector into 4 chunks.
3346 // The sources are also splitted into 4 chunks, and each destination
3347 // chunk must come from a different source chunk.
3349 // SRC1 => X3 X2 X1 X0
3350 // SRC2 => Y3 Y2 Y1 Y0
3352 // DST => Y3..Y2, X3..X2, Y1..Y0, X1..X0
3354 unsigned HalfLaneElems = NumLaneElems/2;
3355 for (unsigned l = 0; l != NumElems; l += NumLaneElems) {
3356 for (unsigned i = 0; i != NumLaneElems; ++i) {
3357 int Idx = Mask[i+l];
3358 unsigned RngStart = l + ((Commuted == (i<HalfLaneElems)) ? NumElems : 0);
3359 if (!isUndefOrInRange(Idx, RngStart, RngStart+NumLaneElems))
3361 // For VSHUFPSY, the mask of the second half must be the same as the
3362 // first but with the appropriate offsets. This works in the same way as
3363 // VPERMILPS works with masks.
3364 if (NumElems != 8 || l == 0 || Mask[i] < 0)
3366 if (!isUndefOrEqual(Idx, Mask[i]+l))
3374 /// isMOVHLPSMask - Return true if the specified VECTOR_SHUFFLE operand
3375 /// specifies a shuffle of elements that is suitable for input to MOVHLPS.
3376 static bool isMOVHLPSMask(ArrayRef<int> Mask, EVT VT) {
3377 unsigned NumElems = VT.getVectorNumElements();
3379 if (VT.getSizeInBits() != 128)
3385 // Expect bit0 == 6, bit1 == 7, bit2 == 2, bit3 == 3
3386 return isUndefOrEqual(Mask[0], 6) &&
3387 isUndefOrEqual(Mask[1], 7) &&
3388 isUndefOrEqual(Mask[2], 2) &&
3389 isUndefOrEqual(Mask[3], 3);
3392 /// isMOVHLPS_v_undef_Mask - Special case of isMOVHLPSMask for canonical form
3393 /// of vector_shuffle v, v, <2, 3, 2, 3>, i.e. vector_shuffle v, undef,
3395 static bool isMOVHLPS_v_undef_Mask(ArrayRef<int> Mask, EVT VT) {
3396 unsigned NumElems = VT.getVectorNumElements();
3398 if (VT.getSizeInBits() != 128)
3404 return isUndefOrEqual(Mask[0], 2) &&
3405 isUndefOrEqual(Mask[1], 3) &&
3406 isUndefOrEqual(Mask[2], 2) &&
3407 isUndefOrEqual(Mask[3], 3);
3410 /// isMOVLPMask - Return true if the specified VECTOR_SHUFFLE operand
3411 /// specifies a shuffle of elements that is suitable for input to MOVLP{S|D}.
3412 static bool isMOVLPMask(ArrayRef<int> Mask, EVT VT) {
3413 if (VT.getSizeInBits() != 128)
3416 unsigned NumElems = VT.getVectorNumElements();
3418 if (NumElems != 2 && NumElems != 4)
3421 for (unsigned i = 0; i != NumElems/2; ++i)
3422 if (!isUndefOrEqual(Mask[i], i + NumElems))
3425 for (unsigned i = NumElems/2; i != NumElems; ++i)
3426 if (!isUndefOrEqual(Mask[i], i))
3432 /// isMOVLHPSMask - Return true if the specified VECTOR_SHUFFLE operand
3433 /// specifies a shuffle of elements that is suitable for input to MOVLHPS.
3434 static bool isMOVLHPSMask(ArrayRef<int> Mask, EVT VT) {
3435 unsigned NumElems = VT.getVectorNumElements();
3437 if ((NumElems != 2 && NumElems != 4)
3438 || VT.getSizeInBits() > 128)
3441 for (unsigned i = 0; i != NumElems/2; ++i)
3442 if (!isUndefOrEqual(Mask[i], i))
3445 for (unsigned i = 0; i != NumElems/2; ++i)
3446 if (!isUndefOrEqual(Mask[i + NumElems/2], i + NumElems))
3452 /// isUNPCKLMask - Return true if the specified VECTOR_SHUFFLE operand
3453 /// specifies a shuffle of elements that is suitable for input to UNPCKL.
3454 static bool isUNPCKLMask(ArrayRef<int> Mask, EVT VT,
3455 bool HasAVX2, bool V2IsSplat = false) {
3456 unsigned NumElts = VT.getVectorNumElements();
3458 assert((VT.is128BitVector() || VT.is256BitVector()) &&
3459 "Unsupported vector type for unpckh");
3461 if (VT.getSizeInBits() == 256 && NumElts != 4 && NumElts != 8 &&
3462 (!HasAVX2 || (NumElts != 16 && NumElts != 32)))
3465 // Handle 128 and 256-bit vector lengths. AVX defines UNPCK* to operate
3466 // independently on 128-bit lanes.
3467 unsigned NumLanes = VT.getSizeInBits()/128;
3468 unsigned NumLaneElts = NumElts/NumLanes;
3470 for (unsigned l = 0; l != NumLanes; ++l) {
3471 for (unsigned i = l*NumLaneElts, j = l*NumLaneElts;
3472 i != (l+1)*NumLaneElts;
3475 int BitI1 = Mask[i+1];
3476 if (!isUndefOrEqual(BitI, j))
3479 if (!isUndefOrEqual(BitI1, NumElts))
3482 if (!isUndefOrEqual(BitI1, j + NumElts))
3491 /// isUNPCKHMask - Return true if the specified VECTOR_SHUFFLE operand
3492 /// specifies a shuffle of elements that is suitable for input to UNPCKH.
3493 static bool isUNPCKHMask(ArrayRef<int> Mask, EVT VT,
3494 bool HasAVX2, bool V2IsSplat = false) {
3495 unsigned NumElts = VT.getVectorNumElements();
3497 assert((VT.is128BitVector() || VT.is256BitVector()) &&
3498 "Unsupported vector type for unpckh");
3500 if (VT.getSizeInBits() == 256 && NumElts != 4 && NumElts != 8 &&
3501 (!HasAVX2 || (NumElts != 16 && NumElts != 32)))
3504 // Handle 128 and 256-bit vector lengths. AVX defines UNPCK* to operate
3505 // independently on 128-bit lanes.
3506 unsigned NumLanes = VT.getSizeInBits()/128;
3507 unsigned NumLaneElts = NumElts/NumLanes;
3509 for (unsigned l = 0; l != NumLanes; ++l) {
3510 for (unsigned i = l*NumLaneElts, j = (l*NumLaneElts)+NumLaneElts/2;
3511 i != (l+1)*NumLaneElts; i += 2, ++j) {
3513 int BitI1 = Mask[i+1];
3514 if (!isUndefOrEqual(BitI, j))
3517 if (isUndefOrEqual(BitI1, NumElts))
3520 if (!isUndefOrEqual(BitI1, j+NumElts))
3528 /// isUNPCKL_v_undef_Mask - Special case of isUNPCKLMask for canonical form
3529 /// of vector_shuffle v, v, <0, 4, 1, 5>, i.e. vector_shuffle v, undef,
3531 static bool isUNPCKL_v_undef_Mask(ArrayRef<int> Mask, EVT VT,
3533 unsigned NumElts = VT.getVectorNumElements();
3535 assert((VT.is128BitVector() || VT.is256BitVector()) &&
3536 "Unsupported vector type for unpckh");
3538 if (VT.getSizeInBits() == 256 && NumElts != 4 && NumElts != 8 &&
3539 (!HasAVX2 || (NumElts != 16 && NumElts != 32)))
3542 // For 256-bit i64/f64, use MOVDDUPY instead, so reject the matching pattern
3543 // FIXME: Need a better way to get rid of this, there's no latency difference
3544 // between UNPCKLPD and MOVDDUP, the later should always be checked first and
3545 // the former later. We should also remove the "_undef" special mask.
3546 if (NumElts == 4 && VT.getSizeInBits() == 256)
3549 // Handle 128 and 256-bit vector lengths. AVX defines UNPCK* to operate
3550 // independently on 128-bit lanes.
3551 unsigned NumLanes = VT.getSizeInBits()/128;
3552 unsigned NumLaneElts = NumElts/NumLanes;
3554 for (unsigned l = 0; l != NumLanes; ++l) {
3555 for (unsigned i = l*NumLaneElts, j = l*NumLaneElts;
3556 i != (l+1)*NumLaneElts;
3559 int BitI1 = Mask[i+1];
3561 if (!isUndefOrEqual(BitI, j))
3563 if (!isUndefOrEqual(BitI1, j))
3571 /// isUNPCKH_v_undef_Mask - Special case of isUNPCKHMask for canonical form
3572 /// of vector_shuffle v, v, <2, 6, 3, 7>, i.e. vector_shuffle v, undef,
3574 static bool isUNPCKH_v_undef_Mask(ArrayRef<int> Mask, EVT VT, bool HasAVX2) {
3575 unsigned NumElts = VT.getVectorNumElements();
3577 assert((VT.is128BitVector() || VT.is256BitVector()) &&
3578 "Unsupported vector type for unpckh");
3580 if (VT.getSizeInBits() == 256 && NumElts != 4 && NumElts != 8 &&
3581 (!HasAVX2 || (NumElts != 16 && NumElts != 32)))
3584 // Handle 128 and 256-bit vector lengths. AVX defines UNPCK* to operate
3585 // independently on 128-bit lanes.
3586 unsigned NumLanes = VT.getSizeInBits()/128;
3587 unsigned NumLaneElts = NumElts/NumLanes;
3589 for (unsigned l = 0; l != NumLanes; ++l) {
3590 for (unsigned i = l*NumLaneElts, j = (l*NumLaneElts)+NumLaneElts/2;
3591 i != (l+1)*NumLaneElts; i += 2, ++j) {
3593 int BitI1 = Mask[i+1];
3594 if (!isUndefOrEqual(BitI, j))
3596 if (!isUndefOrEqual(BitI1, j))
3603 /// isMOVLMask - Return true if the specified VECTOR_SHUFFLE operand
3604 /// specifies a shuffle of elements that is suitable for input to MOVSS,
3605 /// MOVSD, and MOVD, i.e. setting the lowest element.
3606 static bool isMOVLMask(ArrayRef<int> Mask, EVT VT) {
3607 if (VT.getVectorElementType().getSizeInBits() < 32)
3609 if (VT.getSizeInBits() == 256)
3612 unsigned NumElts = VT.getVectorNumElements();
3614 if (!isUndefOrEqual(Mask[0], NumElts))
3617 for (unsigned i = 1; i != NumElts; ++i)
3618 if (!isUndefOrEqual(Mask[i], i))
3624 /// isVPERM2X128Mask - Match 256-bit shuffles where the elements are considered
3625 /// as permutations between 128-bit chunks or halves. As an example: this
3627 /// vector_shuffle <4, 5, 6, 7, 12, 13, 14, 15>
3628 /// The first half comes from the second half of V1 and the second half from the
3629 /// the second half of V2.
3630 static bool isVPERM2X128Mask(ArrayRef<int> Mask, EVT VT, bool HasAVX) {
3631 if (!HasAVX || VT.getSizeInBits() != 256)
3634 // The shuffle result is divided into half A and half B. In total the two
3635 // sources have 4 halves, namely: C, D, E, F. The final values of A and
3636 // B must come from C, D, E or F.
3637 unsigned HalfSize = VT.getVectorNumElements()/2;
3638 bool MatchA = false, MatchB = false;
3640 // Check if A comes from one of C, D, E, F.
3641 for (unsigned Half = 0; Half != 4; ++Half) {
3642 if (isSequentialOrUndefInRange(Mask, 0, HalfSize, Half*HalfSize)) {
3648 // Check if B comes from one of C, D, E, F.
3649 for (unsigned Half = 0; Half != 4; ++Half) {
3650 if (isSequentialOrUndefInRange(Mask, HalfSize, HalfSize, Half*HalfSize)) {
3656 return MatchA && MatchB;
3659 /// getShuffleVPERM2X128Immediate - Return the appropriate immediate to shuffle
3660 /// the specified VECTOR_MASK mask with VPERM2F128/VPERM2I128 instructions.
3661 static unsigned getShuffleVPERM2X128Immediate(ShuffleVectorSDNode *SVOp) {
3662 EVT VT = SVOp->getValueType(0);
3664 unsigned HalfSize = VT.getVectorNumElements()/2;
3666 unsigned FstHalf = 0, SndHalf = 0;
3667 for (unsigned i = 0; i < HalfSize; ++i) {
3668 if (SVOp->getMaskElt(i) > 0) {
3669 FstHalf = SVOp->getMaskElt(i)/HalfSize;
3673 for (unsigned i = HalfSize; i < HalfSize*2; ++i) {
3674 if (SVOp->getMaskElt(i) > 0) {
3675 SndHalf = SVOp->getMaskElt(i)/HalfSize;
3680 return (FstHalf | (SndHalf << 4));
3683 /// isVPERMILPMask - Return true if the specified VECTOR_SHUFFLE operand
3684 /// specifies a shuffle of elements that is suitable for input to VPERMILPD*.
3685 /// Note that VPERMIL mask matching is different depending whether theunderlying
3686 /// type is 32 or 64. In the VPERMILPS the high half of the mask should point
3687 /// to the same elements of the low, but to the higher half of the source.
3688 /// In VPERMILPD the two lanes could be shuffled independently of each other
3689 /// with the same restriction that lanes can't be crossed. Also handles PSHUFDY.
3690 static bool isVPERMILPMask(ArrayRef<int> Mask, EVT VT, bool HasAVX) {
3694 unsigned NumElts = VT.getVectorNumElements();
3695 // Only match 256-bit with 32/64-bit types
3696 if (VT.getSizeInBits() != 256 || (NumElts != 4 && NumElts != 8))
3699 unsigned NumLanes = VT.getSizeInBits()/128;
3700 unsigned LaneSize = NumElts/NumLanes;
3701 for (unsigned l = 0; l != NumElts; l += LaneSize) {
3702 for (unsigned i = 0; i != LaneSize; ++i) {
3703 if (!isUndefOrInRange(Mask[i+l], l, l+LaneSize))
3705 if (NumElts != 8 || l == 0)
3707 // VPERMILPS handling
3710 if (!isUndefOrEqual(Mask[i+l], Mask[i]+l))
3718 /// isCommutedMOVLMask - Returns true if the shuffle mask is except the reverse
3719 /// of what x86 movss want. X86 movs requires the lowest element to be lowest
3720 /// element of vector 2 and the other elements to come from vector 1 in order.
3721 static bool isCommutedMOVLMask(ArrayRef<int> Mask, EVT VT,
3722 bool V2IsSplat = false, bool V2IsUndef = false) {
3723 unsigned NumOps = VT.getVectorNumElements();
3724 if (VT.getSizeInBits() == 256)
3726 if (NumOps != 2 && NumOps != 4 && NumOps != 8 && NumOps != 16)
3729 if (!isUndefOrEqual(Mask[0], 0))
3732 for (unsigned i = 1; i != NumOps; ++i)
3733 if (!(isUndefOrEqual(Mask[i], i+NumOps) ||
3734 (V2IsUndef && isUndefOrInRange(Mask[i], NumOps, NumOps*2)) ||
3735 (V2IsSplat && isUndefOrEqual(Mask[i], NumOps))))
3741 /// isMOVSHDUPMask - Return true if the specified VECTOR_SHUFFLE operand
3742 /// specifies a shuffle of elements that is suitable for input to MOVSHDUP.
3743 /// Masks to match: <1, 1, 3, 3> or <1, 1, 3, 3, 5, 5, 7, 7>
3744 static bool isMOVSHDUPMask(ArrayRef<int> Mask, EVT VT,
3745 const X86Subtarget *Subtarget) {
3746 if (!Subtarget->hasSSE3())
3749 unsigned NumElems = VT.getVectorNumElements();
3751 if ((VT.getSizeInBits() == 128 && NumElems != 4) ||
3752 (VT.getSizeInBits() == 256 && NumElems != 8))
3755 // "i+1" is the value the indexed mask element must have
3756 for (unsigned i = 0; i != NumElems; i += 2)
3757 if (!isUndefOrEqual(Mask[i], i+1) ||
3758 !isUndefOrEqual(Mask[i+1], i+1))
3764 /// isMOVSLDUPMask - Return true if the specified VECTOR_SHUFFLE operand
3765 /// specifies a shuffle of elements that is suitable for input to MOVSLDUP.
3766 /// Masks to match: <0, 0, 2, 2> or <0, 0, 2, 2, 4, 4, 6, 6>
3767 static bool isMOVSLDUPMask(ArrayRef<int> Mask, EVT VT,
3768 const X86Subtarget *Subtarget) {
3769 if (!Subtarget->hasSSE3())
3772 unsigned NumElems = VT.getVectorNumElements();
3774 if ((VT.getSizeInBits() == 128 && NumElems != 4) ||
3775 (VT.getSizeInBits() == 256 && NumElems != 8))
3778 // "i" is the value the indexed mask element must have
3779 for (unsigned i = 0; i != NumElems; i += 2)
3780 if (!isUndefOrEqual(Mask[i], i) ||
3781 !isUndefOrEqual(Mask[i+1], i))
3787 /// isMOVDDUPYMask - Return true if the specified VECTOR_SHUFFLE operand
3788 /// specifies a shuffle of elements that is suitable for input to 256-bit
3789 /// version of MOVDDUP.
3790 static bool isMOVDDUPYMask(ArrayRef<int> Mask, EVT VT, bool HasAVX) {
3791 unsigned NumElts = VT.getVectorNumElements();
3793 if (!HasAVX || VT.getSizeInBits() != 256 || NumElts != 4)
3796 for (unsigned i = 0; i != NumElts/2; ++i)
3797 if (!isUndefOrEqual(Mask[i], 0))
3799 for (unsigned i = NumElts/2; i != NumElts; ++i)
3800 if (!isUndefOrEqual(Mask[i], NumElts/2))
3805 /// isMOVDDUPMask - Return true if the specified VECTOR_SHUFFLE operand
3806 /// specifies a shuffle of elements that is suitable for input to 128-bit
3807 /// version of MOVDDUP.
3808 static bool isMOVDDUPMask(ArrayRef<int> Mask, EVT VT) {
3809 if (VT.getSizeInBits() != 128)
3812 unsigned e = VT.getVectorNumElements() / 2;
3813 for (unsigned i = 0; i != e; ++i)
3814 if (!isUndefOrEqual(Mask[i], i))
3816 for (unsigned i = 0; i != e; ++i)
3817 if (!isUndefOrEqual(Mask[e+i], i))
3822 /// isVEXTRACTF128Index - Return true if the specified
3823 /// EXTRACT_SUBVECTOR operand specifies a vector extract that is
3824 /// suitable for input to VEXTRACTF128.
3825 bool X86::isVEXTRACTF128Index(SDNode *N) {
3826 if (!isa<ConstantSDNode>(N->getOperand(1).getNode()))
3829 // The index should be aligned on a 128-bit boundary.
3831 cast<ConstantSDNode>(N->getOperand(1).getNode())->getZExtValue();
3833 unsigned VL = N->getValueType(0).getVectorNumElements();
3834 unsigned VBits = N->getValueType(0).getSizeInBits();
3835 unsigned ElSize = VBits / VL;
3836 bool Result = (Index * ElSize) % 128 == 0;
3841 /// isVINSERTF128Index - Return true if the specified INSERT_SUBVECTOR
3842 /// operand specifies a subvector insert that is suitable for input to
3844 bool X86::isVINSERTF128Index(SDNode *N) {
3845 if (!isa<ConstantSDNode>(N->getOperand(2).getNode()))
3848 // The index should be aligned on a 128-bit boundary.
3850 cast<ConstantSDNode>(N->getOperand(2).getNode())->getZExtValue();
3852 unsigned VL = N->getValueType(0).getVectorNumElements();
3853 unsigned VBits = N->getValueType(0).getSizeInBits();
3854 unsigned ElSize = VBits / VL;
3855 bool Result = (Index * ElSize) % 128 == 0;
3860 /// getShuffleSHUFImmediate - Return the appropriate immediate to shuffle
3861 /// the specified VECTOR_SHUFFLE mask with PSHUF* and SHUFP* instructions.
3862 /// Handles 128-bit and 256-bit.
3863 static unsigned getShuffleSHUFImmediate(ShuffleVectorSDNode *N) {
3864 EVT VT = N->getValueType(0);
3866 assert((VT.is128BitVector() || VT.is256BitVector()) &&
3867 "Unsupported vector type for PSHUF/SHUFP");
3869 // Handle 128 and 256-bit vector lengths. AVX defines PSHUF/SHUFP to operate
3870 // independently on 128-bit lanes.
3871 unsigned NumElts = VT.getVectorNumElements();
3872 unsigned NumLanes = VT.getSizeInBits()/128;
3873 unsigned NumLaneElts = NumElts/NumLanes;
3875 assert((NumLaneElts == 2 || NumLaneElts == 4) &&
3876 "Only supports 2 or 4 elements per lane");
3878 unsigned Shift = (NumLaneElts == 4) ? 1 : 0;
3880 for (unsigned i = 0; i != NumElts; ++i) {
3881 int Elt = N->getMaskElt(i);
3882 if (Elt < 0) continue;
3884 unsigned ShAmt = i << Shift;
3885 if (ShAmt >= 8) ShAmt -= 8;
3886 Mask |= Elt << ShAmt;
3892 /// getShufflePSHUFHWImmediate - Return the appropriate immediate to shuffle
3893 /// the specified VECTOR_SHUFFLE mask with the PSHUFHW instruction.
3894 static unsigned getShufflePSHUFHWImmediate(ShuffleVectorSDNode *N) {
3896 // 8 nodes, but we only care about the last 4.
3897 for (unsigned i = 7; i >= 4; --i) {
3898 int Val = N->getMaskElt(i);
3907 /// getShufflePSHUFLWImmediate - Return the appropriate immediate to shuffle
3908 /// the specified VECTOR_SHUFFLE mask with the PSHUFLW instruction.
3909 static unsigned getShufflePSHUFLWImmediate(ShuffleVectorSDNode *N) {
3911 // 8 nodes, but we only care about the first 4.
3912 for (int i = 3; i >= 0; --i) {
3913 int Val = N->getMaskElt(i);
3922 /// getShufflePALIGNRImmediate - Return the appropriate immediate to shuffle
3923 /// the specified VECTOR_SHUFFLE mask with the PALIGNR instruction.
3924 static unsigned getShufflePALIGNRImmediate(ShuffleVectorSDNode *SVOp) {
3925 EVT VT = SVOp->getValueType(0);
3926 unsigned EltSize = VT.getVectorElementType().getSizeInBits() >> 3;
3928 unsigned NumElts = VT.getVectorNumElements();
3929 unsigned NumLanes = VT.getSizeInBits()/128;
3930 unsigned NumLaneElts = NumElts/NumLanes;
3934 for (i = 0; i != NumElts; ++i) {
3935 Val = SVOp->getMaskElt(i);
3939 if (Val >= (int)NumElts)
3940 Val -= NumElts - NumLaneElts;
3942 assert(Val - i > 0 && "PALIGNR imm should be positive");
3943 return (Val - i) * EltSize;
3946 /// getExtractVEXTRACTF128Immediate - Return the appropriate immediate
3947 /// to extract the specified EXTRACT_SUBVECTOR index with VEXTRACTF128
3949 unsigned X86::getExtractVEXTRACTF128Immediate(SDNode *N) {
3950 if (!isa<ConstantSDNode>(N->getOperand(1).getNode()))
3951 llvm_unreachable("Illegal extract subvector for VEXTRACTF128");
3954 cast<ConstantSDNode>(N->getOperand(1).getNode())->getZExtValue();
3956 EVT VecVT = N->getOperand(0).getValueType();
3957 EVT ElVT = VecVT.getVectorElementType();
3959 unsigned NumElemsPerChunk = 128 / ElVT.getSizeInBits();
3960 return Index / NumElemsPerChunk;
3963 /// getInsertVINSERTF128Immediate - Return the appropriate immediate
3964 /// to insert at the specified INSERT_SUBVECTOR index with VINSERTF128
3966 unsigned X86::getInsertVINSERTF128Immediate(SDNode *N) {
3967 if (!isa<ConstantSDNode>(N->getOperand(2).getNode()))
3968 llvm_unreachable("Illegal insert subvector for VINSERTF128");
3971 cast<ConstantSDNode>(N->getOperand(2).getNode())->getZExtValue();
3973 EVT VecVT = N->getValueType(0);
3974 EVT ElVT = VecVT.getVectorElementType();
3976 unsigned NumElemsPerChunk = 128 / ElVT.getSizeInBits();
3977 return Index / NumElemsPerChunk;
3980 /// getShuffleCLImmediate - Return the appropriate immediate to shuffle
3981 /// the specified VECTOR_SHUFFLE mask with VPERMQ and VPERMPD instructions.
3982 /// Handles 256-bit.
3983 static unsigned getShuffleCLImmediate(ShuffleVectorSDNode *N) {
3984 EVT VT = N->getValueType(0);
3986 unsigned NumElts = VT.getVectorNumElements();
3988 assert((VT.is256BitVector() && NumElts == 4) &&
3989 "Unsupported vector type for VPERMQ/VPERMPD");
3992 for (unsigned i = 0; i != NumElts; ++i) {
3993 int Elt = N->getMaskElt(i);
3996 Mask |= Elt << (i*2);
4001 /// isZeroNode - Returns true if Elt is a constant zero or a floating point
4003 bool X86::isZeroNode(SDValue Elt) {
4004 return ((isa<ConstantSDNode>(Elt) &&
4005 cast<ConstantSDNode>(Elt)->isNullValue()) ||
4006 (isa<ConstantFPSDNode>(Elt) &&
4007 cast<ConstantFPSDNode>(Elt)->getValueAPF().isPosZero()));
4010 /// CommuteVectorShuffle - Swap vector_shuffle operands as well as values in
4011 /// their permute mask.
4012 static SDValue CommuteVectorShuffle(ShuffleVectorSDNode *SVOp,
4013 SelectionDAG &DAG) {
4014 EVT VT = SVOp->getValueType(0);
4015 unsigned NumElems = VT.getVectorNumElements();
4016 SmallVector<int, 8> MaskVec;
4018 for (unsigned i = 0; i != NumElems; ++i) {
4019 int idx = SVOp->getMaskElt(i);
4021 MaskVec.push_back(idx);
4022 else if (idx < (int)NumElems)
4023 MaskVec.push_back(idx + NumElems);
4025 MaskVec.push_back(idx - NumElems);
4027 return DAG.getVectorShuffle(VT, SVOp->getDebugLoc(), SVOp->getOperand(1),
4028 SVOp->getOperand(0), &MaskVec[0]);
4031 /// ShouldXformToMOVHLPS - Return true if the node should be transformed to
4032 /// match movhlps. The lower half elements should come from upper half of
4033 /// V1 (and in order), and the upper half elements should come from the upper
4034 /// half of V2 (and in order).
4035 static bool ShouldXformToMOVHLPS(ArrayRef<int> Mask, EVT VT) {
4036 if (VT.getSizeInBits() != 128)
4038 if (VT.getVectorNumElements() != 4)
4040 for (unsigned i = 0, e = 2; i != e; ++i)
4041 if (!isUndefOrEqual(Mask[i], i+2))
4043 for (unsigned i = 2; i != 4; ++i)
4044 if (!isUndefOrEqual(Mask[i], i+4))
4049 /// isScalarLoadToVector - Returns true if the node is a scalar load that
4050 /// is promoted to a vector. It also returns the LoadSDNode by reference if
4052 static bool isScalarLoadToVector(SDNode *N, LoadSDNode **LD = NULL) {
4053 if (N->getOpcode() != ISD::SCALAR_TO_VECTOR)
4055 N = N->getOperand(0).getNode();
4056 if (!ISD::isNON_EXTLoad(N))
4059 *LD = cast<LoadSDNode>(N);
4063 // Test whether the given value is a vector value which will be legalized
4065 static bool WillBeConstantPoolLoad(SDNode *N) {
4066 if (N->getOpcode() != ISD::BUILD_VECTOR)
4069 // Check for any non-constant elements.
4070 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i)
4071 switch (N->getOperand(i).getNode()->getOpcode()) {
4073 case ISD::ConstantFP:
4080 // Vectors of all-zeros and all-ones are materialized with special
4081 // instructions rather than being loaded.
4082 return !ISD::isBuildVectorAllZeros(N) &&
4083 !ISD::isBuildVectorAllOnes(N);
4086 /// ShouldXformToMOVLP{S|D} - Return true if the node should be transformed to
4087 /// match movlp{s|d}. The lower half elements should come from lower half of
4088 /// V1 (and in order), and the upper half elements should come from the upper
4089 /// half of V2 (and in order). And since V1 will become the source of the
4090 /// MOVLP, it must be either a vector load or a scalar load to vector.
4091 static bool ShouldXformToMOVLP(SDNode *V1, SDNode *V2,
4092 ArrayRef<int> Mask, EVT VT) {
4093 if (VT.getSizeInBits() != 128)
4096 if (!ISD::isNON_EXTLoad(V1) && !isScalarLoadToVector(V1))
4098 // Is V2 is a vector load, don't do this transformation. We will try to use
4099 // load folding shufps op.
4100 if (ISD::isNON_EXTLoad(V2) || WillBeConstantPoolLoad(V2))
4103 unsigned NumElems = VT.getVectorNumElements();
4105 if (NumElems != 2 && NumElems != 4)
4107 for (unsigned i = 0, e = NumElems/2; i != e; ++i)
4108 if (!isUndefOrEqual(Mask[i], i))
4110 for (unsigned i = NumElems/2; i != NumElems; ++i)
4111 if (!isUndefOrEqual(Mask[i], i+NumElems))
4116 /// isSplatVector - Returns true if N is a BUILD_VECTOR node whose elements are
4118 static bool isSplatVector(SDNode *N) {
4119 if (N->getOpcode() != ISD::BUILD_VECTOR)
4122 SDValue SplatValue = N->getOperand(0);
4123 for (unsigned i = 1, e = N->getNumOperands(); i != e; ++i)
4124 if (N->getOperand(i) != SplatValue)
4129 /// isZeroShuffle - Returns true if N is a VECTOR_SHUFFLE that can be resolved
4130 /// to an zero vector.
4131 /// FIXME: move to dag combiner / method on ShuffleVectorSDNode
4132 static bool isZeroShuffle(ShuffleVectorSDNode *N) {
4133 SDValue V1 = N->getOperand(0);
4134 SDValue V2 = N->getOperand(1);
4135 unsigned NumElems = N->getValueType(0).getVectorNumElements();
4136 for (unsigned i = 0; i != NumElems; ++i) {
4137 int Idx = N->getMaskElt(i);
4138 if (Idx >= (int)NumElems) {
4139 unsigned Opc = V2.getOpcode();
4140 if (Opc == ISD::UNDEF || ISD::isBuildVectorAllZeros(V2.getNode()))
4142 if (Opc != ISD::BUILD_VECTOR ||
4143 !X86::isZeroNode(V2.getOperand(Idx-NumElems)))
4145 } else if (Idx >= 0) {
4146 unsigned Opc = V1.getOpcode();
4147 if (Opc == ISD::UNDEF || ISD::isBuildVectorAllZeros(V1.getNode()))
4149 if (Opc != ISD::BUILD_VECTOR ||
4150 !X86::isZeroNode(V1.getOperand(Idx)))
4157 /// getZeroVector - Returns a vector of specified type with all zero elements.
4159 static SDValue getZeroVector(EVT VT, const X86Subtarget *Subtarget,
4160 SelectionDAG &DAG, DebugLoc dl) {
4161 assert(VT.isVector() && "Expected a vector type");
4163 // Always build SSE zero vectors as <4 x i32> bitcasted
4164 // to their dest type. This ensures they get CSE'd.
4166 if (VT.getSizeInBits() == 128) { // SSE
4167 if (Subtarget->hasSSE2()) { // SSE2
4168 SDValue Cst = DAG.getTargetConstant(0, MVT::i32);
4169 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, Cst, Cst, Cst, Cst);
4171 SDValue Cst = DAG.getTargetConstantFP(+0.0, MVT::f32);
4172 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4f32, Cst, Cst, Cst, Cst);
4174 } else if (VT.getSizeInBits() == 256) { // AVX
4175 if (Subtarget->hasAVX2()) { // AVX2
4176 SDValue Cst = DAG.getTargetConstant(0, MVT::i32);
4177 SDValue Ops[] = { Cst, Cst, Cst, Cst, Cst, Cst, Cst, Cst };
4178 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v8i32, Ops, 8);
4180 // 256-bit logic and arithmetic instructions in AVX are all
4181 // floating-point, no support for integer ops. Emit fp zeroed vectors.
4182 SDValue Cst = DAG.getTargetConstantFP(+0.0, MVT::f32);
4183 SDValue Ops[] = { Cst, Cst, Cst, Cst, Cst, Cst, Cst, Cst };
4184 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v8f32, Ops, 8);
4187 return DAG.getNode(ISD::BITCAST, dl, VT, Vec);
4190 /// getOnesVector - Returns a vector of specified type with all bits set.
4191 /// Always build ones vectors as <4 x i32> or <8 x i32>. For 256-bit types with
4192 /// no AVX2 supprt, use two <4 x i32> inserted in a <8 x i32> appropriately.
4193 /// Then bitcast to their original type, ensuring they get CSE'd.
4194 static SDValue getOnesVector(EVT VT, bool HasAVX2, SelectionDAG &DAG,
4196 assert(VT.isVector() && "Expected a vector type");
4197 assert((VT.is128BitVector() || VT.is256BitVector())
4198 && "Expected a 128-bit or 256-bit vector type");
4200 SDValue Cst = DAG.getTargetConstant(~0U, MVT::i32);
4202 if (VT.getSizeInBits() == 256) {
4203 if (HasAVX2) { // AVX2
4204 SDValue Ops[] = { Cst, Cst, Cst, Cst, Cst, Cst, Cst, Cst };
4205 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v8i32, Ops, 8);
4207 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, Cst, Cst, Cst, Cst);
4208 SDValue InsV = Insert128BitVector(DAG.getNode(ISD::UNDEF, dl, MVT::v8i32),
4209 Vec, DAG.getConstant(0, MVT::i32), DAG, dl);
4210 Vec = Insert128BitVector(InsV, Vec,
4211 DAG.getConstant(4 /* NumElems/2 */, MVT::i32), DAG, dl);
4214 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, Cst, Cst, Cst, Cst);
4217 return DAG.getNode(ISD::BITCAST, dl, VT, Vec);
4220 /// NormalizeMask - V2 is a splat, modify the mask (if needed) so all elements
4221 /// that point to V2 points to its first element.
4222 static void NormalizeMask(SmallVectorImpl<int> &Mask, unsigned NumElems) {
4223 for (unsigned i = 0; i != NumElems; ++i) {
4224 if (Mask[i] > (int)NumElems) {
4230 /// getMOVLMask - Returns a vector_shuffle mask for an movs{s|d}, movd
4231 /// operation of specified width.
4232 static SDValue getMOVL(SelectionDAG &DAG, DebugLoc dl, EVT VT, SDValue V1,
4234 unsigned NumElems = VT.getVectorNumElements();
4235 SmallVector<int, 8> Mask;
4236 Mask.push_back(NumElems);
4237 for (unsigned i = 1; i != NumElems; ++i)
4239 return DAG.getVectorShuffle(VT, dl, V1, V2, &Mask[0]);
4242 /// getUnpackl - Returns a vector_shuffle node for an unpackl operation.
4243 static SDValue getUnpackl(SelectionDAG &DAG, DebugLoc dl, EVT VT, SDValue V1,
4245 unsigned NumElems = VT.getVectorNumElements();
4246 SmallVector<int, 8> Mask;
4247 for (unsigned i = 0, e = NumElems/2; i != e; ++i) {
4249 Mask.push_back(i + NumElems);
4251 return DAG.getVectorShuffle(VT, dl, V1, V2, &Mask[0]);
4254 /// getUnpackh - Returns a vector_shuffle node for an unpackh operation.
4255 static SDValue getUnpackh(SelectionDAG &DAG, DebugLoc dl, EVT VT, SDValue V1,
4257 unsigned NumElems = VT.getVectorNumElements();
4258 unsigned Half = NumElems/2;
4259 SmallVector<int, 8> Mask;
4260 for (unsigned i = 0; i != Half; ++i) {
4261 Mask.push_back(i + Half);
4262 Mask.push_back(i + NumElems + Half);
4264 return DAG.getVectorShuffle(VT, dl, V1, V2, &Mask[0]);
4267 // PromoteSplati8i16 - All i16 and i8 vector types can't be used directly by
4268 // a generic shuffle instruction because the target has no such instructions.
4269 // Generate shuffles which repeat i16 and i8 several times until they can be
4270 // represented by v4f32 and then be manipulated by target suported shuffles.
4271 static SDValue PromoteSplati8i16(SDValue V, SelectionDAG &DAG, int &EltNo) {
4272 EVT VT = V.getValueType();
4273 int NumElems = VT.getVectorNumElements();
4274 DebugLoc dl = V.getDebugLoc();
4276 while (NumElems > 4) {
4277 if (EltNo < NumElems/2) {
4278 V = getUnpackl(DAG, dl, VT, V, V);
4280 V = getUnpackh(DAG, dl, VT, V, V);
4281 EltNo -= NumElems/2;
4288 /// getLegalSplat - Generate a legal splat with supported x86 shuffles
4289 static SDValue getLegalSplat(SelectionDAG &DAG, SDValue V, int EltNo) {
4290 EVT VT = V.getValueType();
4291 DebugLoc dl = V.getDebugLoc();
4292 assert((VT.getSizeInBits() == 128 || VT.getSizeInBits() == 256)
4293 && "Vector size not supported");
4295 if (VT.getSizeInBits() == 128) {
4296 V = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, V);
4297 int SplatMask[4] = { EltNo, EltNo, EltNo, EltNo };
4298 V = DAG.getVectorShuffle(MVT::v4f32, dl, V, DAG.getUNDEF(MVT::v4f32),
4301 // To use VPERMILPS to splat scalars, the second half of indicies must
4302 // refer to the higher part, which is a duplication of the lower one,
4303 // because VPERMILPS can only handle in-lane permutations.
4304 int SplatMask[8] = { EltNo, EltNo, EltNo, EltNo,
4305 EltNo+4, EltNo+4, EltNo+4, EltNo+4 };
4307 V = DAG.getNode(ISD::BITCAST, dl, MVT::v8f32, V);
4308 V = DAG.getVectorShuffle(MVT::v8f32, dl, V, DAG.getUNDEF(MVT::v8f32),
4312 return DAG.getNode(ISD::BITCAST, dl, VT, V);
4315 /// PromoteSplat - Splat is promoted to target supported vector shuffles.
4316 static SDValue PromoteSplat(ShuffleVectorSDNode *SV, SelectionDAG &DAG) {
4317 EVT SrcVT = SV->getValueType(0);
4318 SDValue V1 = SV->getOperand(0);
4319 DebugLoc dl = SV->getDebugLoc();
4321 int EltNo = SV->getSplatIndex();
4322 int NumElems = SrcVT.getVectorNumElements();
4323 unsigned Size = SrcVT.getSizeInBits();
4325 assert(((Size == 128 && NumElems > 4) || Size == 256) &&
4326 "Unknown how to promote splat for type");
4328 // Extract the 128-bit part containing the splat element and update
4329 // the splat element index when it refers to the higher register.
4331 unsigned Idx = (EltNo >= NumElems/2) ? NumElems/2 : 0;
4332 V1 = Extract128BitVector(V1, DAG.getConstant(Idx, MVT::i32), DAG, dl);
4334 EltNo -= NumElems/2;
4337 // All i16 and i8 vector types can't be used directly by a generic shuffle
4338 // instruction because the target has no such instruction. Generate shuffles
4339 // which repeat i16 and i8 several times until they fit in i32, and then can
4340 // be manipulated by target suported shuffles.
4341 EVT EltVT = SrcVT.getVectorElementType();
4342 if (EltVT == MVT::i8 || EltVT == MVT::i16)
4343 V1 = PromoteSplati8i16(V1, DAG, EltNo);
4345 // Recreate the 256-bit vector and place the same 128-bit vector
4346 // into the low and high part. This is necessary because we want
4347 // to use VPERM* to shuffle the vectors
4349 SDValue InsV = Insert128BitVector(DAG.getUNDEF(SrcVT), V1,
4350 DAG.getConstant(0, MVT::i32), DAG, dl);
4351 V1 = Insert128BitVector(InsV, V1,
4352 DAG.getConstant(NumElems/2, MVT::i32), DAG, dl);
4355 return getLegalSplat(DAG, V1, EltNo);
4358 /// getShuffleVectorZeroOrUndef - Return a vector_shuffle of the specified
4359 /// vector of zero or undef vector. This produces a shuffle where the low
4360 /// element of V2 is swizzled into the zero/undef vector, landing at element
4361 /// Idx. This produces a shuffle mask like 4,1,2,3 (idx=0) or 0,1,2,4 (idx=3).
4362 static SDValue getShuffleVectorZeroOrUndef(SDValue V2, unsigned Idx,
4364 const X86Subtarget *Subtarget,
4365 SelectionDAG &DAG) {
4366 EVT VT = V2.getValueType();
4368 ? getZeroVector(VT, Subtarget, DAG, V2.getDebugLoc()) : DAG.getUNDEF(VT);
4369 unsigned NumElems = VT.getVectorNumElements();
4370 SmallVector<int, 16> MaskVec;
4371 for (unsigned i = 0; i != NumElems; ++i)
4372 // If this is the insertion idx, put the low elt of V2 here.
4373 MaskVec.push_back(i == Idx ? NumElems : i);
4374 return DAG.getVectorShuffle(VT, V2.getDebugLoc(), V1, V2, &MaskVec[0]);
4377 /// getTargetShuffleMask - Calculates the shuffle mask corresponding to the
4378 /// target specific opcode. Returns true if the Mask could be calculated.
4379 /// Sets IsUnary to true if only uses one source.
4380 static bool getTargetShuffleMask(SDNode *N, EVT VT,
4381 SmallVectorImpl<int> &Mask, bool &IsUnary) {
4382 unsigned NumElems = VT.getVectorNumElements();
4386 switch(N->getOpcode()) {
4388 ImmN = N->getOperand(N->getNumOperands()-1);
4389 DecodeSHUFPMask(VT, cast<ConstantSDNode>(ImmN)->getZExtValue(), Mask);
4391 case X86ISD::UNPCKH:
4392 DecodeUNPCKHMask(VT, Mask);
4394 case X86ISD::UNPCKL:
4395 DecodeUNPCKLMask(VT, Mask);
4397 case X86ISD::MOVHLPS:
4398 DecodeMOVHLPSMask(NumElems, Mask);
4400 case X86ISD::MOVLHPS:
4401 DecodeMOVLHPSMask(NumElems, Mask);
4403 case X86ISD::PSHUFD:
4404 case X86ISD::VPERMILP:
4405 ImmN = N->getOperand(N->getNumOperands()-1);
4406 DecodePSHUFMask(VT, cast<ConstantSDNode>(ImmN)->getZExtValue(), Mask);
4409 case X86ISD::PSHUFHW:
4410 ImmN = N->getOperand(N->getNumOperands()-1);
4411 DecodePSHUFHWMask(cast<ConstantSDNode>(ImmN)->getZExtValue(), Mask);
4414 case X86ISD::PSHUFLW:
4415 ImmN = N->getOperand(N->getNumOperands()-1);
4416 DecodePSHUFLWMask(cast<ConstantSDNode>(ImmN)->getZExtValue(), Mask);
4420 case X86ISD::MOVSD: {
4421 // The index 0 always comes from the first element of the second source,
4422 // this is why MOVSS and MOVSD are used in the first place. The other
4423 // elements come from the other positions of the first source vector
4424 Mask.push_back(NumElems);
4425 for (unsigned i = 1; i != NumElems; ++i) {
4430 case X86ISD::VPERM2X128:
4431 ImmN = N->getOperand(N->getNumOperands()-1);
4432 DecodeVPERM2X128Mask(VT, cast<ConstantSDNode>(ImmN)->getZExtValue(), Mask);
4433 if (Mask.empty()) return false;
4435 case X86ISD::MOVDDUP:
4436 case X86ISD::MOVLHPD:
4437 case X86ISD::MOVLPD:
4438 case X86ISD::MOVLPS:
4439 case X86ISD::MOVSHDUP:
4440 case X86ISD::MOVSLDUP:
4441 case X86ISD::PALIGN:
4442 // Not yet implemented
4444 default: llvm_unreachable("unknown target shuffle node");
4450 /// getShuffleScalarElt - Returns the scalar element that will make up the ith
4451 /// element of the result of the vector shuffle.
4452 static SDValue getShuffleScalarElt(SDNode *N, unsigned Index, SelectionDAG &DAG,
4455 return SDValue(); // Limit search depth.
4457 SDValue V = SDValue(N, 0);
4458 EVT VT = V.getValueType();
4459 unsigned Opcode = V.getOpcode();
4461 // Recurse into ISD::VECTOR_SHUFFLE node to find scalars.
4462 if (const ShuffleVectorSDNode *SV = dyn_cast<ShuffleVectorSDNode>(N)) {
4463 int Elt = SV->getMaskElt(Index);
4466 return DAG.getUNDEF(VT.getVectorElementType());
4468 unsigned NumElems = VT.getVectorNumElements();
4469 SDValue NewV = (Elt < (int)NumElems) ? SV->getOperand(0)
4470 : SV->getOperand(1);
4471 return getShuffleScalarElt(NewV.getNode(), Elt % NumElems, DAG, Depth+1);
4474 // Recurse into target specific vector shuffles to find scalars.
4475 if (isTargetShuffle(Opcode)) {
4476 unsigned NumElems = VT.getVectorNumElements();
4477 SmallVector<int, 16> ShuffleMask;
4481 if (!getTargetShuffleMask(N, VT, ShuffleMask, IsUnary))
4484 int Elt = ShuffleMask[Index];
4486 return DAG.getUNDEF(VT.getVectorElementType());
4488 SDValue NewV = (Elt < (int)NumElems) ? N->getOperand(0)
4490 return getShuffleScalarElt(NewV.getNode(), Elt % NumElems, DAG,
4494 // Actual nodes that may contain scalar elements
4495 if (Opcode == ISD::BITCAST) {
4496 V = V.getOperand(0);
4497 EVT SrcVT = V.getValueType();
4498 unsigned NumElems = VT.getVectorNumElements();
4500 if (!SrcVT.isVector() || SrcVT.getVectorNumElements() != NumElems)
4504 if (V.getOpcode() == ISD::SCALAR_TO_VECTOR)
4505 return (Index == 0) ? V.getOperand(0)
4506 : DAG.getUNDEF(VT.getVectorElementType());
4508 if (V.getOpcode() == ISD::BUILD_VECTOR)
4509 return V.getOperand(Index);
4514 /// getNumOfConsecutiveZeros - Return the number of elements of a vector
4515 /// shuffle operation which come from a consecutively from a zero. The
4516 /// search can start in two different directions, from left or right.
4518 unsigned getNumOfConsecutiveZeros(ShuffleVectorSDNode *SVOp, unsigned NumElems,
4519 bool ZerosFromLeft, SelectionDAG &DAG) {
4521 for (i = 0; i != NumElems; ++i) {
4522 unsigned Index = ZerosFromLeft ? i : NumElems-i-1;
4523 SDValue Elt = getShuffleScalarElt(SVOp, Index, DAG, 0);
4524 if (!(Elt.getNode() &&
4525 (Elt.getOpcode() == ISD::UNDEF || X86::isZeroNode(Elt))))
4532 /// isShuffleMaskConsecutive - Check if the shuffle mask indicies [MaskI, MaskE)
4533 /// correspond consecutively to elements from one of the vector operands,
4534 /// starting from its index OpIdx. Also tell OpNum which source vector operand.
4536 bool isShuffleMaskConsecutive(ShuffleVectorSDNode *SVOp,
4537 unsigned MaskI, unsigned MaskE, unsigned OpIdx,
4538 unsigned NumElems, unsigned &OpNum) {
4539 bool SeenV1 = false;
4540 bool SeenV2 = false;
4542 for (unsigned i = MaskI; i != MaskE; ++i, ++OpIdx) {
4543 int Idx = SVOp->getMaskElt(i);
4544 // Ignore undef indicies
4548 if (Idx < (int)NumElems)
4553 // Only accept consecutive elements from the same vector
4554 if ((Idx % NumElems != OpIdx) || (SeenV1 && SeenV2))
4558 OpNum = SeenV1 ? 0 : 1;
4562 /// isVectorShiftRight - Returns true if the shuffle can be implemented as a
4563 /// logical left shift of a vector.
4564 static bool isVectorShiftRight(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG,
4565 bool &isLeft, SDValue &ShVal, unsigned &ShAmt) {
4566 unsigned NumElems = SVOp->getValueType(0).getVectorNumElements();
4567 unsigned NumZeros = getNumOfConsecutiveZeros(SVOp, NumElems,
4568 false /* check zeros from right */, DAG);
4574 // Considering the elements in the mask that are not consecutive zeros,
4575 // check if they consecutively come from only one of the source vectors.
4577 // V1 = {X, A, B, C} 0
4579 // vector_shuffle V1, V2 <1, 2, 3, X>
4581 if (!isShuffleMaskConsecutive(SVOp,
4582 0, // Mask Start Index
4583 NumElems-NumZeros, // Mask End Index(exclusive)
4584 NumZeros, // Where to start looking in the src vector
4585 NumElems, // Number of elements in vector
4586 OpSrc)) // Which source operand ?
4591 ShVal = SVOp->getOperand(OpSrc);
4595 /// isVectorShiftLeft - Returns true if the shuffle can be implemented as a
4596 /// logical left shift of a vector.
4597 static bool isVectorShiftLeft(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG,
4598 bool &isLeft, SDValue &ShVal, unsigned &ShAmt) {
4599 unsigned NumElems = SVOp->getValueType(0).getVectorNumElements();
4600 unsigned NumZeros = getNumOfConsecutiveZeros(SVOp, NumElems,
4601 true /* check zeros from left */, DAG);
4607 // Considering the elements in the mask that are not consecutive zeros,
4608 // check if they consecutively come from only one of the source vectors.
4610 // 0 { A, B, X, X } = V2
4612 // vector_shuffle V1, V2 <X, X, 4, 5>
4614 if (!isShuffleMaskConsecutive(SVOp,
4615 NumZeros, // Mask Start Index
4616 NumElems, // Mask End Index(exclusive)
4617 0, // Where to start looking in the src vector
4618 NumElems, // Number of elements in vector
4619 OpSrc)) // Which source operand ?
4624 ShVal = SVOp->getOperand(OpSrc);
4628 /// isVectorShift - Returns true if the shuffle can be implemented as a
4629 /// logical left or right shift of a vector.
4630 static bool isVectorShift(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG,
4631 bool &isLeft, SDValue &ShVal, unsigned &ShAmt) {
4632 // Although the logic below support any bitwidth size, there are no
4633 // shift instructions which handle more than 128-bit vectors.
4634 if (SVOp->getValueType(0).getSizeInBits() > 128)
4637 if (isVectorShiftLeft(SVOp, DAG, isLeft, ShVal, ShAmt) ||
4638 isVectorShiftRight(SVOp, DAG, isLeft, ShVal, ShAmt))
4644 /// LowerBuildVectorv16i8 - Custom lower build_vector of v16i8.
4646 static SDValue LowerBuildVectorv16i8(SDValue Op, unsigned NonZeros,
4647 unsigned NumNonZero, unsigned NumZero,
4649 const X86Subtarget* Subtarget,
4650 const TargetLowering &TLI) {
4654 DebugLoc dl = Op.getDebugLoc();
4657 for (unsigned i = 0; i < 16; ++i) {
4658 bool ThisIsNonZero = (NonZeros & (1 << i)) != 0;
4659 if (ThisIsNonZero && First) {
4661 V = getZeroVector(MVT::v8i16, Subtarget, DAG, dl);
4663 V = DAG.getUNDEF(MVT::v8i16);
4668 SDValue ThisElt(0, 0), LastElt(0, 0);
4669 bool LastIsNonZero = (NonZeros & (1 << (i-1))) != 0;
4670 if (LastIsNonZero) {
4671 LastElt = DAG.getNode(ISD::ZERO_EXTEND, dl,
4672 MVT::i16, Op.getOperand(i-1));
4674 if (ThisIsNonZero) {
4675 ThisElt = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i16, Op.getOperand(i));
4676 ThisElt = DAG.getNode(ISD::SHL, dl, MVT::i16,
4677 ThisElt, DAG.getConstant(8, MVT::i8));
4679 ThisElt = DAG.getNode(ISD::OR, dl, MVT::i16, ThisElt, LastElt);
4683 if (ThisElt.getNode())
4684 V = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, V, ThisElt,
4685 DAG.getIntPtrConstant(i/2));
4689 return DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, V);
4692 /// LowerBuildVectorv8i16 - Custom lower build_vector of v8i16.
4694 static SDValue LowerBuildVectorv8i16(SDValue Op, unsigned NonZeros,
4695 unsigned NumNonZero, unsigned NumZero,
4697 const X86Subtarget* Subtarget,
4698 const TargetLowering &TLI) {
4702 DebugLoc dl = Op.getDebugLoc();
4705 for (unsigned i = 0; i < 8; ++i) {
4706 bool isNonZero = (NonZeros & (1 << i)) != 0;
4710 V = getZeroVector(MVT::v8i16, Subtarget, DAG, dl);
4712 V = DAG.getUNDEF(MVT::v8i16);
4715 V = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl,
4716 MVT::v8i16, V, Op.getOperand(i),
4717 DAG.getIntPtrConstant(i));
4724 /// getVShift - Return a vector logical shift node.
4726 static SDValue getVShift(bool isLeft, EVT VT, SDValue SrcOp,
4727 unsigned NumBits, SelectionDAG &DAG,
4728 const TargetLowering &TLI, DebugLoc dl) {
4729 assert(VT.getSizeInBits() == 128 && "Unknown type for VShift");
4730 EVT ShVT = MVT::v2i64;
4731 unsigned Opc = isLeft ? X86ISD::VSHLDQ : X86ISD::VSRLDQ;
4732 SrcOp = DAG.getNode(ISD::BITCAST, dl, ShVT, SrcOp);
4733 return DAG.getNode(ISD::BITCAST, dl, VT,
4734 DAG.getNode(Opc, dl, ShVT, SrcOp,
4735 DAG.getConstant(NumBits,
4736 TLI.getShiftAmountTy(SrcOp.getValueType()))));
4740 X86TargetLowering::LowerAsSplatVectorLoad(SDValue SrcOp, EVT VT, DebugLoc dl,
4741 SelectionDAG &DAG) const {
4743 // Check if the scalar load can be widened into a vector load. And if
4744 // the address is "base + cst" see if the cst can be "absorbed" into
4745 // the shuffle mask.
4746 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(SrcOp)) {
4747 SDValue Ptr = LD->getBasePtr();
4748 if (!ISD::isNormalLoad(LD) || LD->isVolatile())
4750 EVT PVT = LD->getValueType(0);
4751 if (PVT != MVT::i32 && PVT != MVT::f32)
4756 if (FrameIndexSDNode *FINode = dyn_cast<FrameIndexSDNode>(Ptr)) {
4757 FI = FINode->getIndex();
4759 } else if (DAG.isBaseWithConstantOffset(Ptr) &&
4760 isa<FrameIndexSDNode>(Ptr.getOperand(0))) {
4761 FI = cast<FrameIndexSDNode>(Ptr.getOperand(0))->getIndex();
4762 Offset = Ptr.getConstantOperandVal(1);
4763 Ptr = Ptr.getOperand(0);
4768 // FIXME: 256-bit vector instructions don't require a strict alignment,
4769 // improve this code to support it better.
4770 unsigned RequiredAlign = VT.getSizeInBits()/8;
4771 SDValue Chain = LD->getChain();
4772 // Make sure the stack object alignment is at least 16 or 32.
4773 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
4774 if (DAG.InferPtrAlignment(Ptr) < RequiredAlign) {
4775 if (MFI->isFixedObjectIndex(FI)) {
4776 // Can't change the alignment. FIXME: It's possible to compute
4777 // the exact stack offset and reference FI + adjust offset instead.
4778 // If someone *really* cares about this. That's the way to implement it.
4781 MFI->setObjectAlignment(FI, RequiredAlign);
4785 // (Offset % 16 or 32) must be multiple of 4. Then address is then
4786 // Ptr + (Offset & ~15).
4789 if ((Offset % RequiredAlign) & 3)
4791 int64_t StartOffset = Offset & ~(RequiredAlign-1);
4793 Ptr = DAG.getNode(ISD::ADD, Ptr.getDebugLoc(), Ptr.getValueType(),
4794 Ptr,DAG.getConstant(StartOffset, Ptr.getValueType()));
4796 int EltNo = (Offset - StartOffset) >> 2;
4797 int NumElems = VT.getVectorNumElements();
4799 EVT NVT = EVT::getVectorVT(*DAG.getContext(), PVT, NumElems);
4800 SDValue V1 = DAG.getLoad(NVT, dl, Chain, Ptr,
4801 LD->getPointerInfo().getWithOffset(StartOffset),
4802 false, false, false, 0);
4804 SmallVector<int, 8> Mask;
4805 for (int i = 0; i < NumElems; ++i)
4806 Mask.push_back(EltNo);
4808 return DAG.getVectorShuffle(NVT, dl, V1, DAG.getUNDEF(NVT), &Mask[0]);
4814 /// EltsFromConsecutiveLoads - Given the initializing elements 'Elts' of a
4815 /// vector of type 'VT', see if the elements can be replaced by a single large
4816 /// load which has the same value as a build_vector whose operands are 'elts'.
4818 /// Example: <load i32 *a, load i32 *a+4, undef, undef> -> zextload a
4820 /// FIXME: we'd also like to handle the case where the last elements are zero
4821 /// rather than undef via VZEXT_LOAD, but we do not detect that case today.
4822 /// There's even a handy isZeroNode for that purpose.
4823 static SDValue EltsFromConsecutiveLoads(EVT VT, SmallVectorImpl<SDValue> &Elts,
4824 DebugLoc &DL, SelectionDAG &DAG) {
4825 EVT EltVT = VT.getVectorElementType();
4826 unsigned NumElems = Elts.size();
4828 LoadSDNode *LDBase = NULL;
4829 unsigned LastLoadedElt = -1U;
4831 // For each element in the initializer, see if we've found a load or an undef.
4832 // If we don't find an initial load element, or later load elements are
4833 // non-consecutive, bail out.
4834 for (unsigned i = 0; i < NumElems; ++i) {
4835 SDValue Elt = Elts[i];
4837 if (!Elt.getNode() ||
4838 (Elt.getOpcode() != ISD::UNDEF && !ISD::isNON_EXTLoad(Elt.getNode())))
4841 if (Elt.getNode()->getOpcode() == ISD::UNDEF)
4843 LDBase = cast<LoadSDNode>(Elt.getNode());
4847 if (Elt.getOpcode() == ISD::UNDEF)
4850 LoadSDNode *LD = cast<LoadSDNode>(Elt);
4851 if (!DAG.isConsecutiveLoad(LD, LDBase, EltVT.getSizeInBits()/8, i))
4856 // If we have found an entire vector of loads and undefs, then return a large
4857 // load of the entire vector width starting at the base pointer. If we found
4858 // consecutive loads for the low half, generate a vzext_load node.
4859 if (LastLoadedElt == NumElems - 1) {
4860 if (DAG.InferPtrAlignment(LDBase->getBasePtr()) >= 16)
4861 return DAG.getLoad(VT, DL, LDBase->getChain(), LDBase->getBasePtr(),
4862 LDBase->getPointerInfo(),
4863 LDBase->isVolatile(), LDBase->isNonTemporal(),
4864 LDBase->isInvariant(), 0);
4865 return DAG.getLoad(VT, DL, LDBase->getChain(), LDBase->getBasePtr(),
4866 LDBase->getPointerInfo(),
4867 LDBase->isVolatile(), LDBase->isNonTemporal(),
4868 LDBase->isInvariant(), LDBase->getAlignment());
4869 } else if (NumElems == 4 && LastLoadedElt == 1 &&
4870 DAG.getTargetLoweringInfo().isTypeLegal(MVT::v2i64)) {
4871 SDVTList Tys = DAG.getVTList(MVT::v2i64, MVT::Other);
4872 SDValue Ops[] = { LDBase->getChain(), LDBase->getBasePtr() };
4874 DAG.getMemIntrinsicNode(X86ISD::VZEXT_LOAD, DL, Tys, Ops, 2, MVT::i64,
4875 LDBase->getPointerInfo(),
4876 LDBase->getAlignment(),
4877 false/*isVolatile*/, true/*ReadMem*/,
4879 return DAG.getNode(ISD::BITCAST, DL, VT, ResNode);
4884 /// LowerVectorBroadcast - Attempt to use the vbroadcast instruction
4885 /// to generate a splat value for the following cases:
4886 /// 1. A splat BUILD_VECTOR which uses a single scalar load, or a constant.
4887 /// 2. A splat shuffle which uses a scalar_to_vector node which comes from
4888 /// a scalar load, or a constant.
4889 /// The VBROADCAST node is returned when a pattern is found,
4890 /// or SDValue() otherwise.
4892 X86TargetLowering::LowerVectorBroadcast(SDValue &Op, SelectionDAG &DAG) const {
4893 if (!Subtarget->hasAVX())
4896 EVT VT = Op.getValueType();
4897 DebugLoc dl = Op.getDebugLoc();
4902 switch (Op.getOpcode()) {
4904 // Unknown pattern found.
4907 case ISD::BUILD_VECTOR: {
4908 // The BUILD_VECTOR node must be a splat.
4909 if (!isSplatVector(Op.getNode()))
4912 Ld = Op.getOperand(0);
4913 ConstSplatVal = (Ld.getOpcode() == ISD::Constant ||
4914 Ld.getOpcode() == ISD::ConstantFP);
4916 // The suspected load node has several users. Make sure that all
4917 // of its users are from the BUILD_VECTOR node.
4918 // Constants may have multiple users.
4919 if (!ConstSplatVal && !Ld->hasNUsesOfValue(VT.getVectorNumElements(), 0))
4924 case ISD::VECTOR_SHUFFLE: {
4925 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
4927 // Shuffles must have a splat mask where the first element is
4929 if ((!SVOp->isSplat()) || SVOp->getMaskElt(0) != 0)
4932 SDValue Sc = Op.getOperand(0);
4933 if (Sc.getOpcode() != ISD::SCALAR_TO_VECTOR)
4936 Ld = Sc.getOperand(0);
4937 ConstSplatVal = (Ld.getOpcode() == ISD::Constant ||
4938 Ld.getOpcode() == ISD::ConstantFP);
4940 // The scalar_to_vector node and the suspected
4941 // load node must have exactly one user.
4942 // Constants may have multiple users.
4943 if (!ConstSplatVal && (!Sc.hasOneUse() || !Ld.hasOneUse()))
4949 bool Is256 = VT.getSizeInBits() == 256;
4950 bool Is128 = VT.getSizeInBits() == 128;
4952 // Handle the broadcasting a single constant scalar from the constant pool
4953 // into a vector. On Sandybridge it is still better to load a constant vector
4954 // from the constant pool and not to broadcast it from a scalar.
4955 if (ConstSplatVal && Subtarget->hasAVX2()) {
4956 EVT CVT = Ld.getValueType();
4957 assert(!CVT.isVector() && "Must not broadcast a vector type");
4958 unsigned ScalarSize = CVT.getSizeInBits();
4960 if ((Is256 && (ScalarSize == 32 || ScalarSize == 64)) ||
4961 (Is128 && (ScalarSize == 32))) {
4963 const Constant *C = 0;
4964 if (ConstantSDNode *CI = dyn_cast<ConstantSDNode>(Ld))
4965 C = CI->getConstantIntValue();
4966 else if (ConstantFPSDNode *CF = dyn_cast<ConstantFPSDNode>(Ld))
4967 C = CF->getConstantFPValue();
4969 assert(C && "Invalid constant type");
4971 SDValue CP = DAG.getConstantPool(C, getPointerTy());
4972 unsigned Alignment = cast<ConstantPoolSDNode>(CP)->getAlignment();
4973 Ld = DAG.getLoad(CVT, dl, DAG.getEntryNode(), CP,
4974 MachinePointerInfo::getConstantPool(),
4975 false, false, false, Alignment);
4977 return DAG.getNode(X86ISD::VBROADCAST, dl, VT, Ld);
4981 // The scalar source must be a normal load.
4982 if (!ISD::isNormalLoad(Ld.getNode()))
4985 // Reject loads that have uses of the chain result
4986 if (Ld->hasAnyUseOfValue(1))
4989 unsigned ScalarSize = Ld.getValueType().getSizeInBits();
4991 // VBroadcast to YMM
4992 if (Is256 && (ScalarSize == 32 || ScalarSize == 64))
4993 return DAG.getNode(X86ISD::VBROADCAST, dl, VT, Ld);
4995 // VBroadcast to XMM
4996 if (Is128 && (ScalarSize == 32))
4997 return DAG.getNode(X86ISD::VBROADCAST, dl, VT, Ld);
4999 // The integer check is needed for the 64-bit into 128-bit so it doesn't match
5000 // double since there is vbroadcastsd xmm
5001 if (Subtarget->hasAVX2() && Ld.getValueType().isInteger()) {
5002 // VBroadcast to YMM
5003 if (Is256 && (ScalarSize == 8 || ScalarSize == 16))
5004 return DAG.getNode(X86ISD::VBROADCAST, dl, VT, Ld);
5006 // VBroadcast to XMM
5007 if (Is128 && (ScalarSize == 8 || ScalarSize == 16 || ScalarSize == 64))
5008 return DAG.getNode(X86ISD::VBROADCAST, dl, VT, Ld);
5011 // Unsupported broadcast.
5016 X86TargetLowering::LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG) const {
5017 DebugLoc dl = Op.getDebugLoc();
5019 EVT VT = Op.getValueType();
5020 EVT ExtVT = VT.getVectorElementType();
5021 unsigned NumElems = Op.getNumOperands();
5023 // Vectors containing all zeros can be matched by pxor and xorps later
5024 if (ISD::isBuildVectorAllZeros(Op.getNode())) {
5025 // Canonicalize this to <4 x i32> to 1) ensure the zero vectors are CSE'd
5026 // and 2) ensure that i64 scalars are eliminated on x86-32 hosts.
5027 if (VT == MVT::v4i32 || VT == MVT::v8i32)
5030 return getZeroVector(VT, Subtarget, DAG, dl);
5033 // Vectors containing all ones can be matched by pcmpeqd on 128-bit width
5034 // vectors or broken into v4i32 operations on 256-bit vectors. AVX2 can use
5035 // vpcmpeqd on 256-bit vectors.
5036 if (ISD::isBuildVectorAllOnes(Op.getNode())) {
5037 if (VT == MVT::v4i32 || (VT == MVT::v8i32 && Subtarget->hasAVX2()))
5040 return getOnesVector(VT, Subtarget->hasAVX2(), DAG, dl);
5043 SDValue Broadcast = LowerVectorBroadcast(Op, DAG);
5044 if (Broadcast.getNode())
5047 unsigned EVTBits = ExtVT.getSizeInBits();
5049 unsigned NumZero = 0;
5050 unsigned NumNonZero = 0;
5051 unsigned NonZeros = 0;
5052 bool IsAllConstants = true;
5053 SmallSet<SDValue, 8> Values;
5054 for (unsigned i = 0; i < NumElems; ++i) {
5055 SDValue Elt = Op.getOperand(i);
5056 if (Elt.getOpcode() == ISD::UNDEF)
5059 if (Elt.getOpcode() != ISD::Constant &&
5060 Elt.getOpcode() != ISD::ConstantFP)
5061 IsAllConstants = false;
5062 if (X86::isZeroNode(Elt))
5065 NonZeros |= (1 << i);
5070 // All undef vector. Return an UNDEF. All zero vectors were handled above.
5071 if (NumNonZero == 0)
5072 return DAG.getUNDEF(VT);
5074 // Special case for single non-zero, non-undef, element.
5075 if (NumNonZero == 1) {
5076 unsigned Idx = CountTrailingZeros_32(NonZeros);
5077 SDValue Item = Op.getOperand(Idx);
5079 // If this is an insertion of an i64 value on x86-32, and if the top bits of
5080 // the value are obviously zero, truncate the value to i32 and do the
5081 // insertion that way. Only do this if the value is non-constant or if the
5082 // value is a constant being inserted into element 0. It is cheaper to do
5083 // a constant pool load than it is to do a movd + shuffle.
5084 if (ExtVT == MVT::i64 && !Subtarget->is64Bit() &&
5085 (!IsAllConstants || Idx == 0)) {
5086 if (DAG.MaskedValueIsZero(Item, APInt::getBitsSet(64, 32, 64))) {
5088 assert(VT == MVT::v2i64 && "Expected an SSE value type!");
5089 EVT VecVT = MVT::v4i32;
5090 unsigned VecElts = 4;
5092 // Truncate the value (which may itself be a constant) to i32, and
5093 // convert it to a vector with movd (S2V+shuffle to zero extend).
5094 Item = DAG.getNode(ISD::TRUNCATE, dl, MVT::i32, Item);
5095 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VecVT, Item);
5096 Item = getShuffleVectorZeroOrUndef(Item, 0, true, Subtarget, DAG);
5098 // Now we have our 32-bit value zero extended in the low element of
5099 // a vector. If Idx != 0, swizzle it into place.
5101 SmallVector<int, 4> Mask;
5102 Mask.push_back(Idx);
5103 for (unsigned i = 1; i != VecElts; ++i)
5105 Item = DAG.getVectorShuffle(VecVT, dl, Item,
5106 DAG.getUNDEF(Item.getValueType()),
5109 return DAG.getNode(ISD::BITCAST, dl, VT, Item);
5113 // If we have a constant or non-constant insertion into the low element of
5114 // a vector, we can do this with SCALAR_TO_VECTOR + shuffle of zero into
5115 // the rest of the elements. This will be matched as movd/movq/movss/movsd
5116 // depending on what the source datatype is.
5119 return DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Item);
5121 if (ExtVT == MVT::i32 || ExtVT == MVT::f32 || ExtVT == MVT::f64 ||
5122 (ExtVT == MVT::i64 && Subtarget->is64Bit())) {
5123 if (VT.getSizeInBits() == 256) {
5124 SDValue ZeroVec = getZeroVector(VT, Subtarget, DAG, dl);
5125 return DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, ZeroVec,
5126 Item, DAG.getIntPtrConstant(0));
5128 assert(VT.getSizeInBits() == 128 && "Expected an SSE value type!");
5129 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Item);
5130 // Turn it into a MOVL (i.e. movss, movsd, or movd) to a zero vector.
5131 return getShuffleVectorZeroOrUndef(Item, 0, true, Subtarget, DAG);
5134 if (ExtVT == MVT::i16 || ExtVT == MVT::i8) {
5135 Item = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, Item);
5136 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32, Item);
5137 if (VT.getSizeInBits() == 256) {
5138 SDValue ZeroVec = getZeroVector(MVT::v8i32, Subtarget, DAG, dl);
5139 Item = Insert128BitVector(ZeroVec, Item, DAG.getConstant(0, MVT::i32),
5142 assert(VT.getSizeInBits() == 128 && "Expected an SSE value type!");
5143 Item = getShuffleVectorZeroOrUndef(Item, 0, true, Subtarget, DAG);
5145 return DAG.getNode(ISD::BITCAST, dl, VT, Item);
5149 // Is it a vector logical left shift?
5150 if (NumElems == 2 && Idx == 1 &&
5151 X86::isZeroNode(Op.getOperand(0)) &&
5152 !X86::isZeroNode(Op.getOperand(1))) {
5153 unsigned NumBits = VT.getSizeInBits();
5154 return getVShift(true, VT,
5155 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
5156 VT, Op.getOperand(1)),
5157 NumBits/2, DAG, *this, dl);
5160 if (IsAllConstants) // Otherwise, it's better to do a constpool load.
5163 // Otherwise, if this is a vector with i32 or f32 elements, and the element
5164 // is a non-constant being inserted into an element other than the low one,
5165 // we can't use a constant pool load. Instead, use SCALAR_TO_VECTOR (aka
5166 // movd/movss) to move this into the low element, then shuffle it into
5168 if (EVTBits == 32) {
5169 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Item);
5171 // Turn it into a shuffle of zero and zero-extended scalar to vector.
5172 Item = getShuffleVectorZeroOrUndef(Item, 0, NumZero > 0, Subtarget, DAG);
5173 SmallVector<int, 8> MaskVec;
5174 for (unsigned i = 0; i < NumElems; i++)
5175 MaskVec.push_back(i == Idx ? 0 : 1);
5176 return DAG.getVectorShuffle(VT, dl, Item, DAG.getUNDEF(VT), &MaskVec[0]);
5180 // Splat is obviously ok. Let legalizer expand it to a shuffle.
5181 if (Values.size() == 1) {
5182 if (EVTBits == 32) {
5183 // Instead of a shuffle like this:
5184 // shuffle (scalar_to_vector (load (ptr + 4))), undef, <0, 0, 0, 0>
5185 // Check if it's possible to issue this instead.
5186 // shuffle (vload ptr)), undef, <1, 1, 1, 1>
5187 unsigned Idx = CountTrailingZeros_32(NonZeros);
5188 SDValue Item = Op.getOperand(Idx);
5189 if (Op.getNode()->isOnlyUserOf(Item.getNode()))
5190 return LowerAsSplatVectorLoad(Item, VT, dl, DAG);
5195 // A vector full of immediates; various special cases are already
5196 // handled, so this is best done with a single constant-pool load.
5200 // For AVX-length vectors, build the individual 128-bit pieces and use
5201 // shuffles to put them in place.
5202 if (VT.getSizeInBits() == 256) {
5203 SmallVector<SDValue, 32> V;
5204 for (unsigned i = 0; i != NumElems; ++i)
5205 V.push_back(Op.getOperand(i));
5207 EVT HVT = EVT::getVectorVT(*DAG.getContext(), ExtVT, NumElems/2);
5209 // Build both the lower and upper subvector.
5210 SDValue Lower = DAG.getNode(ISD::BUILD_VECTOR, dl, HVT, &V[0], NumElems/2);
5211 SDValue Upper = DAG.getNode(ISD::BUILD_VECTOR, dl, HVT, &V[NumElems / 2],
5214 // Recreate the wider vector with the lower and upper part.
5215 SDValue Vec = Insert128BitVector(DAG.getNode(ISD::UNDEF, dl, VT), Lower,
5216 DAG.getConstant(0, MVT::i32), DAG, dl);
5217 return Insert128BitVector(Vec, Upper, DAG.getConstant(NumElems/2, MVT::i32),
5221 // Let legalizer expand 2-wide build_vectors.
5222 if (EVTBits == 64) {
5223 if (NumNonZero == 1) {
5224 // One half is zero or undef.
5225 unsigned Idx = CountTrailingZeros_32(NonZeros);
5226 SDValue V2 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT,
5227 Op.getOperand(Idx));
5228 return getShuffleVectorZeroOrUndef(V2, Idx, true, Subtarget, DAG);
5233 // If element VT is < 32 bits, convert it to inserts into a zero vector.
5234 if (EVTBits == 8 && NumElems == 16) {
5235 SDValue V = LowerBuildVectorv16i8(Op, NonZeros,NumNonZero,NumZero, DAG,
5237 if (V.getNode()) return V;
5240 if (EVTBits == 16 && NumElems == 8) {
5241 SDValue V = LowerBuildVectorv8i16(Op, NonZeros,NumNonZero,NumZero, DAG,
5243 if (V.getNode()) return V;
5246 // If element VT is == 32 bits, turn it into a number of shuffles.
5247 SmallVector<SDValue, 8> V(NumElems);
5248 if (NumElems == 4 && NumZero > 0) {
5249 for (unsigned i = 0; i < 4; ++i) {
5250 bool isZero = !(NonZeros & (1 << i));
5252 V[i] = getZeroVector(VT, Subtarget, DAG, dl);
5254 V[i] = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Op.getOperand(i));
5257 for (unsigned i = 0; i < 2; ++i) {
5258 switch ((NonZeros & (0x3 << i*2)) >> (i*2)) {
5261 V[i] = V[i*2]; // Must be a zero vector.
5264 V[i] = getMOVL(DAG, dl, VT, V[i*2+1], V[i*2]);
5267 V[i] = getMOVL(DAG, dl, VT, V[i*2], V[i*2+1]);
5270 V[i] = getUnpackl(DAG, dl, VT, V[i*2], V[i*2+1]);
5275 bool Reverse1 = (NonZeros & 0x3) == 2;
5276 bool Reverse2 = ((NonZeros & (0x3 << 2)) >> 2) == 2;
5280 static_cast<int>(Reverse2 ? NumElems+1 : NumElems),
5281 static_cast<int>(Reverse2 ? NumElems : NumElems+1)
5283 return DAG.getVectorShuffle(VT, dl, V[0], V[1], &MaskVec[0]);
5286 if (Values.size() > 1 && VT.getSizeInBits() == 128) {
5287 // Check for a build vector of consecutive loads.
5288 for (unsigned i = 0; i < NumElems; ++i)
5289 V[i] = Op.getOperand(i);
5291 // Check for elements which are consecutive loads.
5292 SDValue LD = EltsFromConsecutiveLoads(VT, V, dl, DAG);
5296 // For SSE 4.1, use insertps to put the high elements into the low element.
5297 if (getSubtarget()->hasSSE41()) {
5299 if (Op.getOperand(0).getOpcode() != ISD::UNDEF)
5300 Result = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Op.getOperand(0));
5302 Result = DAG.getUNDEF(VT);
5304 for (unsigned i = 1; i < NumElems; ++i) {
5305 if (Op.getOperand(i).getOpcode() == ISD::UNDEF) continue;
5306 Result = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, Result,
5307 Op.getOperand(i), DAG.getIntPtrConstant(i));
5312 // Otherwise, expand into a number of unpckl*, start by extending each of
5313 // our (non-undef) elements to the full vector width with the element in the
5314 // bottom slot of the vector (which generates no code for SSE).
5315 for (unsigned i = 0; i < NumElems; ++i) {
5316 if (Op.getOperand(i).getOpcode() != ISD::UNDEF)
5317 V[i] = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Op.getOperand(i));
5319 V[i] = DAG.getUNDEF(VT);
5322 // Next, we iteratively mix elements, e.g. for v4f32:
5323 // Step 1: unpcklps 0, 2 ==> X: <?, ?, 2, 0>
5324 // : unpcklps 1, 3 ==> Y: <?, ?, 3, 1>
5325 // Step 2: unpcklps X, Y ==> <3, 2, 1, 0>
5326 unsigned EltStride = NumElems >> 1;
5327 while (EltStride != 0) {
5328 for (unsigned i = 0; i < EltStride; ++i) {
5329 // If V[i+EltStride] is undef and this is the first round of mixing,
5330 // then it is safe to just drop this shuffle: V[i] is already in the
5331 // right place, the one element (since it's the first round) being
5332 // inserted as undef can be dropped. This isn't safe for successive
5333 // rounds because they will permute elements within both vectors.
5334 if (V[i+EltStride].getOpcode() == ISD::UNDEF &&
5335 EltStride == NumElems/2)
5338 V[i] = getUnpackl(DAG, dl, VT, V[i], V[i + EltStride]);
5347 // LowerMMXCONCAT_VECTORS - We support concatenate two MMX registers and place
5348 // them in a MMX register. This is better than doing a stack convert.
5349 static SDValue LowerMMXCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) {
5350 DebugLoc dl = Op.getDebugLoc();
5351 EVT ResVT = Op.getValueType();
5353 assert(ResVT == MVT::v2i64 || ResVT == MVT::v4i32 ||
5354 ResVT == MVT::v8i16 || ResVT == MVT::v16i8);
5356 SDValue InVec = DAG.getNode(ISD::BITCAST,dl, MVT::v1i64, Op.getOperand(0));
5357 SDValue VecOp = DAG.getNode(X86ISD::MOVQ2DQ, dl, MVT::v2i64, InVec);
5358 InVec = Op.getOperand(1);
5359 if (InVec.getOpcode() == ISD::SCALAR_TO_VECTOR) {
5360 unsigned NumElts = ResVT.getVectorNumElements();
5361 VecOp = DAG.getNode(ISD::BITCAST, dl, ResVT, VecOp);
5362 VecOp = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, ResVT, VecOp,
5363 InVec.getOperand(0), DAG.getIntPtrConstant(NumElts/2+1));
5365 InVec = DAG.getNode(ISD::BITCAST, dl, MVT::v1i64, InVec);
5366 SDValue VecOp2 = DAG.getNode(X86ISD::MOVQ2DQ, dl, MVT::v2i64, InVec);
5367 Mask[0] = 0; Mask[1] = 2;
5368 VecOp = DAG.getVectorShuffle(MVT::v2i64, dl, VecOp, VecOp2, Mask);
5370 return DAG.getNode(ISD::BITCAST, dl, ResVT, VecOp);
5373 // LowerAVXCONCAT_VECTORS - 256-bit AVX can use the vinsertf128 instruction
5374 // to create 256-bit vectors from two other 128-bit ones.
5375 static SDValue LowerAVXCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) {
5376 DebugLoc dl = Op.getDebugLoc();
5377 EVT ResVT = Op.getValueType();
5379 assert(ResVT.getSizeInBits() == 256 && "Value type must be 256-bit wide");
5381 SDValue V1 = Op.getOperand(0);
5382 SDValue V2 = Op.getOperand(1);
5383 unsigned NumElems = ResVT.getVectorNumElements();
5385 SDValue V = Insert128BitVector(DAG.getNode(ISD::UNDEF, dl, ResVT), V1,
5386 DAG.getConstant(0, MVT::i32), DAG, dl);
5387 return Insert128BitVector(V, V2, DAG.getConstant(NumElems/2, MVT::i32),
5392 X86TargetLowering::LowerCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) const {
5393 EVT ResVT = Op.getValueType();
5395 assert(Op.getNumOperands() == 2);
5396 assert((ResVT.getSizeInBits() == 128 || ResVT.getSizeInBits() == 256) &&
5397 "Unsupported CONCAT_VECTORS for value type");
5399 // We support concatenate two MMX registers and place them in a MMX register.
5400 // This is better than doing a stack convert.
5401 if (ResVT.is128BitVector())
5402 return LowerMMXCONCAT_VECTORS(Op, DAG);
5404 // 256-bit AVX can use the vinsertf128 instruction to create 256-bit vectors
5405 // from two other 128-bit ones.
5406 return LowerAVXCONCAT_VECTORS(Op, DAG);
5409 // Try to lower a shuffle node into a simple blend instruction.
5410 static SDValue LowerVECTOR_SHUFFLEtoBlend(SDValue Op,
5411 const X86Subtarget *Subtarget,
5412 SelectionDAG &DAG) {
5413 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
5414 SDValue V1 = SVOp->getOperand(0);
5415 SDValue V2 = SVOp->getOperand(1);
5416 DebugLoc dl = SVOp->getDebugLoc();
5417 EVT VT = Op.getValueType();
5418 EVT InVT = V1.getValueType();
5419 int MaskSize = VT.getVectorNumElements();
5420 int InSize = InVT.getVectorNumElements();
5422 if (!Subtarget->hasSSE41())
5425 if (MaskSize != InSize)
5431 switch (VT.getSimpleVT().SimpleTy) {
5432 default: return SDValue();
5434 ISDNo = X86ISD::BLENDPW;
5439 ISDNo = X86ISD::BLENDPS;
5444 ISDNo = X86ISD::BLENDPD;
5449 if (!Subtarget->hasAVX())
5451 ISDNo = X86ISD::BLENDPS;
5456 if (!Subtarget->hasAVX())
5458 ISDNo = X86ISD::BLENDPD;
5462 if (!Subtarget->hasAVX2())
5464 ISDNo = X86ISD::BLENDPW;
5468 assert(ISDNo && "Invalid Op Number");
5470 unsigned MaskVals = 0;
5472 for (int i = 0; i < MaskSize; ++i) {
5473 int EltIdx = SVOp->getMaskElt(i);
5474 if (EltIdx == i || EltIdx == -1)
5476 else if (EltIdx == (i + MaskSize))
5477 continue; // Bit is set to zero;
5478 else return SDValue();
5481 V1 = DAG.getNode(ISD::BITCAST, dl, OpTy, V1);
5482 V2 = DAG.getNode(ISD::BITCAST, dl, OpTy, V2);
5483 SDValue Ret = DAG.getNode(ISDNo, dl, OpTy, V1, V2,
5484 DAG.getConstant(MaskVals, MVT::i32));
5485 return DAG.getNode(ISD::BITCAST, dl, VT, Ret);
5488 // v8i16 shuffles - Prefer shuffles in the following order:
5489 // 1. [all] pshuflw, pshufhw, optional move
5490 // 2. [ssse3] 1 x pshufb
5491 // 3. [ssse3] 2 x pshufb + 1 x por
5492 // 4. [all] mov + pshuflw + pshufhw + N x (pextrw + pinsrw)
5494 X86TargetLowering::LowerVECTOR_SHUFFLEv8i16(SDValue Op,
5495 SelectionDAG &DAG) const {
5496 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
5497 SDValue V1 = SVOp->getOperand(0);
5498 SDValue V2 = SVOp->getOperand(1);
5499 DebugLoc dl = SVOp->getDebugLoc();
5500 SmallVector<int, 8> MaskVals;
5502 // Determine if more than 1 of the words in each of the low and high quadwords
5503 // of the result come from the same quadword of one of the two inputs. Undef
5504 // mask values count as coming from any quadword, for better codegen.
5505 unsigned LoQuad[] = { 0, 0, 0, 0 };
5506 unsigned HiQuad[] = { 0, 0, 0, 0 };
5507 std::bitset<4> InputQuads;
5508 for (unsigned i = 0; i < 8; ++i) {
5509 unsigned *Quad = i < 4 ? LoQuad : HiQuad;
5510 int EltIdx = SVOp->getMaskElt(i);
5511 MaskVals.push_back(EltIdx);
5520 InputQuads.set(EltIdx / 4);
5523 int BestLoQuad = -1;
5524 unsigned MaxQuad = 1;
5525 for (unsigned i = 0; i < 4; ++i) {
5526 if (LoQuad[i] > MaxQuad) {
5528 MaxQuad = LoQuad[i];
5532 int BestHiQuad = -1;
5534 for (unsigned i = 0; i < 4; ++i) {
5535 if (HiQuad[i] > MaxQuad) {
5537 MaxQuad = HiQuad[i];
5541 // For SSSE3, If all 8 words of the result come from only 1 quadword of each
5542 // of the two input vectors, shuffle them into one input vector so only a
5543 // single pshufb instruction is necessary. If There are more than 2 input
5544 // quads, disable the next transformation since it does not help SSSE3.
5545 bool V1Used = InputQuads[0] || InputQuads[1];
5546 bool V2Used = InputQuads[2] || InputQuads[3];
5547 if (Subtarget->hasSSSE3()) {
5548 if (InputQuads.count() == 2 && V1Used && V2Used) {
5549 BestLoQuad = InputQuads[0] ? 0 : 1;
5550 BestHiQuad = InputQuads[2] ? 2 : 3;
5552 if (InputQuads.count() > 2) {
5558 // If BestLoQuad or BestHiQuad are set, shuffle the quads together and update
5559 // the shuffle mask. If a quad is scored as -1, that means that it contains
5560 // words from all 4 input quadwords.
5562 if (BestLoQuad >= 0 || BestHiQuad >= 0) {
5564 BestLoQuad < 0 ? 0 : BestLoQuad,
5565 BestHiQuad < 0 ? 1 : BestHiQuad
5567 NewV = DAG.getVectorShuffle(MVT::v2i64, dl,
5568 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64, V1),
5569 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64, V2), &MaskV[0]);
5570 NewV = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, NewV);
5572 // Rewrite the MaskVals and assign NewV to V1 if NewV now contains all the
5573 // source words for the shuffle, to aid later transformations.
5574 bool AllWordsInNewV = true;
5575 bool InOrder[2] = { true, true };
5576 for (unsigned i = 0; i != 8; ++i) {
5577 int idx = MaskVals[i];
5579 InOrder[i/4] = false;
5580 if (idx < 0 || (idx/4) == BestLoQuad || (idx/4) == BestHiQuad)
5582 AllWordsInNewV = false;
5586 bool pshuflw = AllWordsInNewV, pshufhw = AllWordsInNewV;
5587 if (AllWordsInNewV) {
5588 for (int i = 0; i != 8; ++i) {
5589 int idx = MaskVals[i];
5592 idx = MaskVals[i] = (idx / 4) == BestLoQuad ? (idx & 3) : (idx & 3) + 4;
5593 if ((idx != i) && idx < 4)
5595 if ((idx != i) && idx > 3)
5604 // If we've eliminated the use of V2, and the new mask is a pshuflw or
5605 // pshufhw, that's as cheap as it gets. Return the new shuffle.
5606 if ((pshufhw && InOrder[0]) || (pshuflw && InOrder[1])) {
5607 unsigned Opc = pshufhw ? X86ISD::PSHUFHW : X86ISD::PSHUFLW;
5608 unsigned TargetMask = 0;
5609 NewV = DAG.getVectorShuffle(MVT::v8i16, dl, NewV,
5610 DAG.getUNDEF(MVT::v8i16), &MaskVals[0]);
5611 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(NewV.getNode());
5612 TargetMask = pshufhw ? getShufflePSHUFHWImmediate(SVOp):
5613 getShufflePSHUFLWImmediate(SVOp);
5614 V1 = NewV.getOperand(0);
5615 return getTargetShuffleNode(Opc, dl, MVT::v8i16, V1, TargetMask, DAG);
5619 // If we have SSSE3, and all words of the result are from 1 input vector,
5620 // case 2 is generated, otherwise case 3 is generated. If no SSSE3
5621 // is present, fall back to case 4.
5622 if (Subtarget->hasSSSE3()) {
5623 SmallVector<SDValue,16> pshufbMask;
5625 // If we have elements from both input vectors, set the high bit of the
5626 // shuffle mask element to zero out elements that come from V2 in the V1
5627 // mask, and elements that come from V1 in the V2 mask, so that the two
5628 // results can be OR'd together.
5629 bool TwoInputs = V1Used && V2Used;
5630 for (unsigned i = 0; i != 8; ++i) {
5631 int EltIdx = MaskVals[i] * 2;
5632 if (TwoInputs && (EltIdx >= 16)) {
5633 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
5634 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
5637 pshufbMask.push_back(DAG.getConstant(EltIdx, MVT::i8));
5638 pshufbMask.push_back(DAG.getConstant(EltIdx+1, MVT::i8));
5640 V1 = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, V1);
5641 V1 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V1,
5642 DAG.getNode(ISD::BUILD_VECTOR, dl,
5643 MVT::v16i8, &pshufbMask[0], 16));
5645 return DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, V1);
5647 // Calculate the shuffle mask for the second input, shuffle it, and
5648 // OR it with the first shuffled input.
5650 for (unsigned i = 0; i != 8; ++i) {
5651 int EltIdx = MaskVals[i] * 2;
5653 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
5654 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
5657 pshufbMask.push_back(DAG.getConstant(EltIdx - 16, MVT::i8));
5658 pshufbMask.push_back(DAG.getConstant(EltIdx - 15, MVT::i8));
5660 V2 = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, V2);
5661 V2 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V2,
5662 DAG.getNode(ISD::BUILD_VECTOR, dl,
5663 MVT::v16i8, &pshufbMask[0], 16));
5664 V1 = DAG.getNode(ISD::OR, dl, MVT::v16i8, V1, V2);
5665 return DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, V1);
5668 // If BestLoQuad >= 0, generate a pshuflw to put the low elements in order,
5669 // and update MaskVals with new element order.
5670 std::bitset<8> InOrder;
5671 if (BestLoQuad >= 0) {
5672 int MaskV[] = { -1, -1, -1, -1, 4, 5, 6, 7 };
5673 for (int i = 0; i != 4; ++i) {
5674 int idx = MaskVals[i];
5677 } else if ((idx / 4) == BestLoQuad) {
5682 NewV = DAG.getVectorShuffle(MVT::v8i16, dl, NewV, DAG.getUNDEF(MVT::v8i16),
5685 if (NewV.getOpcode() == ISD::VECTOR_SHUFFLE && Subtarget->hasSSSE3()) {
5686 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(NewV.getNode());
5687 NewV = getTargetShuffleNode(X86ISD::PSHUFLW, dl, MVT::v8i16,
5689 getShufflePSHUFLWImmediate(SVOp), DAG);
5693 // If BestHi >= 0, generate a pshufhw to put the high elements in order,
5694 // and update MaskVals with the new element order.
5695 if (BestHiQuad >= 0) {
5696 int MaskV[] = { 0, 1, 2, 3, -1, -1, -1, -1 };
5697 for (unsigned i = 4; i != 8; ++i) {
5698 int idx = MaskVals[i];
5701 } else if ((idx / 4) == BestHiQuad) {
5702 MaskV[i] = (idx & 3) + 4;
5706 NewV = DAG.getVectorShuffle(MVT::v8i16, dl, NewV, DAG.getUNDEF(MVT::v8i16),
5709 if (NewV.getOpcode() == ISD::VECTOR_SHUFFLE && Subtarget->hasSSSE3()) {
5710 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(NewV.getNode());
5711 NewV = getTargetShuffleNode(X86ISD::PSHUFHW, dl, MVT::v8i16,
5713 getShufflePSHUFHWImmediate(SVOp), DAG);
5717 // In case BestHi & BestLo were both -1, which means each quadword has a word
5718 // from each of the four input quadwords, calculate the InOrder bitvector now
5719 // before falling through to the insert/extract cleanup.
5720 if (BestLoQuad == -1 && BestHiQuad == -1) {
5722 for (int i = 0; i != 8; ++i)
5723 if (MaskVals[i] < 0 || MaskVals[i] == i)
5727 // The other elements are put in the right place using pextrw and pinsrw.
5728 for (unsigned i = 0; i != 8; ++i) {
5731 int EltIdx = MaskVals[i];
5734 SDValue ExtOp = (EltIdx < 8)
5735 ? DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, V1,
5736 DAG.getIntPtrConstant(EltIdx))
5737 : DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, V2,
5738 DAG.getIntPtrConstant(EltIdx - 8));
5739 NewV = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, NewV, ExtOp,
5740 DAG.getIntPtrConstant(i));
5745 // v16i8 shuffles - Prefer shuffles in the following order:
5746 // 1. [ssse3] 1 x pshufb
5747 // 2. [ssse3] 2 x pshufb + 1 x por
5748 // 3. [all] v8i16 shuffle + N x pextrw + rotate + pinsrw
5750 SDValue LowerVECTOR_SHUFFLEv16i8(ShuffleVectorSDNode *SVOp,
5752 const X86TargetLowering &TLI) {
5753 SDValue V1 = SVOp->getOperand(0);
5754 SDValue V2 = SVOp->getOperand(1);
5755 DebugLoc dl = SVOp->getDebugLoc();
5756 ArrayRef<int> MaskVals = SVOp->getMask();
5758 // If we have SSSE3, case 1 is generated when all result bytes come from
5759 // one of the inputs. Otherwise, case 2 is generated. If no SSSE3 is
5760 // present, fall back to case 3.
5761 // FIXME: kill V2Only once shuffles are canonizalized by getNode.
5764 for (unsigned i = 0; i < 16; ++i) {
5765 int EltIdx = MaskVals[i];
5774 // If SSSE3, use 1 pshufb instruction per vector with elements in the result.
5775 if (TLI.getSubtarget()->hasSSSE3()) {
5776 SmallVector<SDValue,16> pshufbMask;
5778 // If all result elements are from one input vector, then only translate
5779 // undef mask values to 0x80 (zero out result) in the pshufb mask.
5781 // Otherwise, we have elements from both input vectors, and must zero out
5782 // elements that come from V2 in the first mask, and V1 in the second mask
5783 // so that we can OR them together.
5784 bool TwoInputs = !(V1Only || V2Only);
5785 for (unsigned i = 0; i != 16; ++i) {
5786 int EltIdx = MaskVals[i];
5787 if (EltIdx < 0 || (TwoInputs && EltIdx >= 16)) {
5788 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
5791 pshufbMask.push_back(DAG.getConstant(EltIdx, MVT::i8));
5793 // If all the elements are from V2, assign it to V1 and return after
5794 // building the first pshufb.
5797 V1 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V1,
5798 DAG.getNode(ISD::BUILD_VECTOR, dl,
5799 MVT::v16i8, &pshufbMask[0], 16));
5803 // Calculate the shuffle mask for the second input, shuffle it, and
5804 // OR it with the first shuffled input.
5806 for (unsigned i = 0; i != 16; ++i) {
5807 int EltIdx = MaskVals[i];
5809 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
5812 pshufbMask.push_back(DAG.getConstant(EltIdx - 16, MVT::i8));
5814 V2 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V2,
5815 DAG.getNode(ISD::BUILD_VECTOR, dl,
5816 MVT::v16i8, &pshufbMask[0], 16));
5817 return DAG.getNode(ISD::OR, dl, MVT::v16i8, V1, V2);
5820 // No SSSE3 - Calculate in place words and then fix all out of place words
5821 // With 0-16 extracts & inserts. Worst case is 16 bytes out of order from
5822 // the 16 different words that comprise the two doublequadword input vectors.
5823 V1 = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, V1);
5824 V2 = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, V2);
5825 SDValue NewV = V2Only ? V2 : V1;
5826 for (int i = 0; i != 8; ++i) {
5827 int Elt0 = MaskVals[i*2];
5828 int Elt1 = MaskVals[i*2+1];
5830 // This word of the result is all undef, skip it.
5831 if (Elt0 < 0 && Elt1 < 0)
5834 // This word of the result is already in the correct place, skip it.
5835 if (V1Only && (Elt0 == i*2) && (Elt1 == i*2+1))
5837 if (V2Only && (Elt0 == i*2+16) && (Elt1 == i*2+17))
5840 SDValue Elt0Src = Elt0 < 16 ? V1 : V2;
5841 SDValue Elt1Src = Elt1 < 16 ? V1 : V2;
5844 // If Elt0 and Elt1 are defined, are consecutive, and can be load
5845 // using a single extract together, load it and store it.
5846 if ((Elt0 >= 0) && ((Elt0 + 1) == Elt1) && ((Elt0 & 1) == 0)) {
5847 InsElt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, Elt1Src,
5848 DAG.getIntPtrConstant(Elt1 / 2));
5849 NewV = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, NewV, InsElt,
5850 DAG.getIntPtrConstant(i));
5854 // If Elt1 is defined, extract it from the appropriate source. If the
5855 // source byte is not also odd, shift the extracted word left 8 bits
5856 // otherwise clear the bottom 8 bits if we need to do an or.
5858 InsElt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, Elt1Src,
5859 DAG.getIntPtrConstant(Elt1 / 2));
5860 if ((Elt1 & 1) == 0)
5861 InsElt = DAG.getNode(ISD::SHL, dl, MVT::i16, InsElt,
5863 TLI.getShiftAmountTy(InsElt.getValueType())));
5865 InsElt = DAG.getNode(ISD::AND, dl, MVT::i16, InsElt,
5866 DAG.getConstant(0xFF00, MVT::i16));
5868 // If Elt0 is defined, extract it from the appropriate source. If the
5869 // source byte is not also even, shift the extracted word right 8 bits. If
5870 // Elt1 was also defined, OR the extracted values together before
5871 // inserting them in the result.
5873 SDValue InsElt0 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16,
5874 Elt0Src, DAG.getIntPtrConstant(Elt0 / 2));
5875 if ((Elt0 & 1) != 0)
5876 InsElt0 = DAG.getNode(ISD::SRL, dl, MVT::i16, InsElt0,
5878 TLI.getShiftAmountTy(InsElt0.getValueType())));
5880 InsElt0 = DAG.getNode(ISD::AND, dl, MVT::i16, InsElt0,
5881 DAG.getConstant(0x00FF, MVT::i16));
5882 InsElt = Elt1 >= 0 ? DAG.getNode(ISD::OR, dl, MVT::i16, InsElt, InsElt0)
5885 NewV = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, NewV, InsElt,
5886 DAG.getIntPtrConstant(i));
5888 return DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, NewV);
5891 /// RewriteAsNarrowerShuffle - Try rewriting v8i16 and v16i8 shuffles as 4 wide
5892 /// ones, or rewriting v4i32 / v4f32 as 2 wide ones if possible. This can be
5893 /// done when every pair / quad of shuffle mask elements point to elements in
5894 /// the right sequence. e.g.
5895 /// vector_shuffle X, Y, <2, 3, | 10, 11, | 0, 1, | 14, 15>
5897 SDValue RewriteAsNarrowerShuffle(ShuffleVectorSDNode *SVOp,
5898 SelectionDAG &DAG, DebugLoc dl) {
5899 EVT VT = SVOp->getValueType(0);
5900 SDValue V1 = SVOp->getOperand(0);
5901 SDValue V2 = SVOp->getOperand(1);
5902 unsigned NumElems = VT.getVectorNumElements();
5903 unsigned NewWidth = (NumElems == 4) ? 2 : 4;
5905 switch (VT.getSimpleVT().SimpleTy) {
5906 default: llvm_unreachable("Unexpected!");
5907 case MVT::v4f32: NewVT = MVT::v2f64; break;
5908 case MVT::v4i32: NewVT = MVT::v2i64; break;
5909 case MVT::v8i16: NewVT = MVT::v4i32; break;
5910 case MVT::v16i8: NewVT = MVT::v4i32; break;
5913 int Scale = NumElems / NewWidth;
5914 SmallVector<int, 8> MaskVec;
5915 for (unsigned i = 0; i < NumElems; i += Scale) {
5917 for (int j = 0; j < Scale; ++j) {
5918 int EltIdx = SVOp->getMaskElt(i+j);
5922 StartIdx = EltIdx - (EltIdx % Scale);
5923 if (EltIdx != StartIdx + j)
5927 MaskVec.push_back(-1);
5929 MaskVec.push_back(StartIdx / Scale);
5932 V1 = DAG.getNode(ISD::BITCAST, dl, NewVT, V1);
5933 V2 = DAG.getNode(ISD::BITCAST, dl, NewVT, V2);
5934 return DAG.getVectorShuffle(NewVT, dl, V1, V2, &MaskVec[0]);
5937 /// getVZextMovL - Return a zero-extending vector move low node.
5939 static SDValue getVZextMovL(EVT VT, EVT OpVT,
5940 SDValue SrcOp, SelectionDAG &DAG,
5941 const X86Subtarget *Subtarget, DebugLoc dl) {
5942 if (VT == MVT::v2f64 || VT == MVT::v4f32) {
5943 LoadSDNode *LD = NULL;
5944 if (!isScalarLoadToVector(SrcOp.getNode(), &LD))
5945 LD = dyn_cast<LoadSDNode>(SrcOp);
5947 // movssrr and movsdrr do not clear top bits. Try to use movd, movq
5949 MVT ExtVT = (OpVT == MVT::v2f64) ? MVT::i64 : MVT::i32;
5950 if ((ExtVT != MVT::i64 || Subtarget->is64Bit()) &&
5951 SrcOp.getOpcode() == ISD::SCALAR_TO_VECTOR &&
5952 SrcOp.getOperand(0).getOpcode() == ISD::BITCAST &&
5953 SrcOp.getOperand(0).getOperand(0).getValueType() == ExtVT) {
5955 OpVT = (OpVT == MVT::v2f64) ? MVT::v2i64 : MVT::v4i32;
5956 return DAG.getNode(ISD::BITCAST, dl, VT,
5957 DAG.getNode(X86ISD::VZEXT_MOVL, dl, OpVT,
5958 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
5966 return DAG.getNode(ISD::BITCAST, dl, VT,
5967 DAG.getNode(X86ISD::VZEXT_MOVL, dl, OpVT,
5968 DAG.getNode(ISD::BITCAST, dl,
5972 /// LowerVECTOR_SHUFFLE_256 - Handle all 256-bit wide vectors shuffles
5973 /// which could not be matched by any known target speficic shuffle
5975 LowerVECTOR_SHUFFLE_256(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG) {
5976 EVT VT = SVOp->getValueType(0);
5978 unsigned NumElems = VT.getVectorNumElements();
5979 unsigned NumLaneElems = NumElems / 2;
5981 DebugLoc dl = SVOp->getDebugLoc();
5982 MVT EltVT = VT.getVectorElementType().getSimpleVT();
5983 EVT NVT = MVT::getVectorVT(EltVT, NumLaneElems);
5986 SmallVector<int, 16> Mask;
5987 for (unsigned l = 0; l < 2; ++l) {
5988 // Build a shuffle mask for the output, discovering on the fly which
5989 // input vectors to use as shuffle operands (recorded in InputUsed).
5990 // If building a suitable shuffle vector proves too hard, then bail
5991 // out with useBuildVector set.
5992 int InputUsed[2] = { -1, -1 }; // Not yet discovered.
5993 unsigned LaneStart = l * NumLaneElems;
5994 for (unsigned i = 0; i != NumLaneElems; ++i) {
5995 // The mask element. This indexes into the input.
5996 int Idx = SVOp->getMaskElt(i+LaneStart);
5998 // the mask element does not index into any input vector.
6003 // The input vector this mask element indexes into.
6004 int Input = Idx / NumLaneElems;
6006 // Turn the index into an offset from the start of the input vector.
6007 Idx -= Input * NumLaneElems;
6009 // Find or create a shuffle vector operand to hold this input.
6011 for (OpNo = 0; OpNo < array_lengthof(InputUsed); ++OpNo) {
6012 if (InputUsed[OpNo] == Input)
6013 // This input vector is already an operand.
6015 if (InputUsed[OpNo] < 0) {
6016 // Create a new operand for this input vector.
6017 InputUsed[OpNo] = Input;
6022 if (OpNo >= array_lengthof(InputUsed)) {
6023 // More than two input vectors used! Give up.
6027 // Add the mask index for the new shuffle vector.
6028 Mask.push_back(Idx + OpNo * NumLaneElems);
6031 if (InputUsed[0] < 0) {
6032 // No input vectors were used! The result is undefined.
6033 Shufs[l] = DAG.getUNDEF(NVT);
6035 SDValue Op0 = Extract128BitVector(SVOp->getOperand(InputUsed[0] / 2),
6036 DAG.getConstant((InputUsed[0] % 2) * NumLaneElems, MVT::i32),
6038 // If only one input was used, use an undefined vector for the other.
6039 SDValue Op1 = (InputUsed[1] < 0) ? DAG.getUNDEF(NVT) :
6040 Extract128BitVector(SVOp->getOperand(InputUsed[1] / 2),
6041 DAG.getConstant((InputUsed[1] % 2) * NumLaneElems, MVT::i32),
6043 // At least one input vector was used. Create a new shuffle vector.
6044 Shufs[l] = DAG.getVectorShuffle(NVT, dl, Op0, Op1, &Mask[0]);
6050 // Concatenate the result back
6051 SDValue V = Insert128BitVector(DAG.getNode(ISD::UNDEF, dl, VT), Shufs[0],
6052 DAG.getConstant(0, MVT::i32), DAG, dl);
6053 return Insert128BitVector(V, Shufs[1],DAG.getConstant(NumLaneElems, MVT::i32),
6057 /// LowerVECTOR_SHUFFLE_128v4 - Handle all 128-bit wide vectors with
6058 /// 4 elements, and match them with several different shuffle types.
6060 LowerVECTOR_SHUFFLE_128v4(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG) {
6061 SDValue V1 = SVOp->getOperand(0);
6062 SDValue V2 = SVOp->getOperand(1);
6063 DebugLoc dl = SVOp->getDebugLoc();
6064 EVT VT = SVOp->getValueType(0);
6066 assert(VT.getSizeInBits() == 128 && "Unsupported vector size");
6068 std::pair<int, int> Locs[4];
6069 int Mask1[] = { -1, -1, -1, -1 };
6070 SmallVector<int, 8> PermMask(SVOp->getMask().begin(), SVOp->getMask().end());
6074 for (unsigned i = 0; i != 4; ++i) {
6075 int Idx = PermMask[i];
6077 Locs[i] = std::make_pair(-1, -1);
6079 assert(Idx < 8 && "Invalid VECTOR_SHUFFLE index!");
6081 Locs[i] = std::make_pair(0, NumLo);
6085 Locs[i] = std::make_pair(1, NumHi);
6087 Mask1[2+NumHi] = Idx;
6093 if (NumLo <= 2 && NumHi <= 2) {
6094 // If no more than two elements come from either vector. This can be
6095 // implemented with two shuffles. First shuffle gather the elements.
6096 // The second shuffle, which takes the first shuffle as both of its
6097 // vector operands, put the elements into the right order.
6098 V1 = DAG.getVectorShuffle(VT, dl, V1, V2, &Mask1[0]);
6100 int Mask2[] = { -1, -1, -1, -1 };
6102 for (unsigned i = 0; i != 4; ++i)
6103 if (Locs[i].first != -1) {
6104 unsigned Idx = (i < 2) ? 0 : 4;
6105 Idx += Locs[i].first * 2 + Locs[i].second;
6109 return DAG.getVectorShuffle(VT, dl, V1, V1, &Mask2[0]);
6110 } else if (NumLo == 3 || NumHi == 3) {
6111 // Otherwise, we must have three elements from one vector, call it X, and
6112 // one element from the other, call it Y. First, use a shufps to build an
6113 // intermediate vector with the one element from Y and the element from X
6114 // that will be in the same half in the final destination (the indexes don't
6115 // matter). Then, use a shufps to build the final vector, taking the half
6116 // containing the element from Y from the intermediate, and the other half
6119 // Normalize it so the 3 elements come from V1.
6120 CommuteVectorShuffleMask(PermMask, 4);
6124 // Find the element from V2.
6126 for (HiIndex = 0; HiIndex < 3; ++HiIndex) {
6127 int Val = PermMask[HiIndex];
6134 Mask1[0] = PermMask[HiIndex];
6136 Mask1[2] = PermMask[HiIndex^1];
6138 V2 = DAG.getVectorShuffle(VT, dl, V1, V2, &Mask1[0]);
6141 Mask1[0] = PermMask[0];
6142 Mask1[1] = PermMask[1];
6143 Mask1[2] = HiIndex & 1 ? 6 : 4;
6144 Mask1[3] = HiIndex & 1 ? 4 : 6;
6145 return DAG.getVectorShuffle(VT, dl, V1, V2, &Mask1[0]);
6147 Mask1[0] = HiIndex & 1 ? 2 : 0;
6148 Mask1[1] = HiIndex & 1 ? 0 : 2;
6149 Mask1[2] = PermMask[2];
6150 Mask1[3] = PermMask[3];
6155 return DAG.getVectorShuffle(VT, dl, V2, V1, &Mask1[0]);
6159 // Break it into (shuffle shuffle_hi, shuffle_lo).
6160 int LoMask[] = { -1, -1, -1, -1 };
6161 int HiMask[] = { -1, -1, -1, -1 };
6163 int *MaskPtr = LoMask;
6164 unsigned MaskIdx = 0;
6167 for (unsigned i = 0; i != 4; ++i) {
6174 int Idx = PermMask[i];
6176 Locs[i] = std::make_pair(-1, -1);
6177 } else if (Idx < 4) {
6178 Locs[i] = std::make_pair(MaskIdx, LoIdx);
6179 MaskPtr[LoIdx] = Idx;
6182 Locs[i] = std::make_pair(MaskIdx, HiIdx);
6183 MaskPtr[HiIdx] = Idx;
6188 SDValue LoShuffle = DAG.getVectorShuffle(VT, dl, V1, V2, &LoMask[0]);
6189 SDValue HiShuffle = DAG.getVectorShuffle(VT, dl, V1, V2, &HiMask[0]);
6190 int MaskOps[] = { -1, -1, -1, -1 };
6191 for (unsigned i = 0; i != 4; ++i)
6192 if (Locs[i].first != -1)
6193 MaskOps[i] = Locs[i].first * 4 + Locs[i].second;
6194 return DAG.getVectorShuffle(VT, dl, LoShuffle, HiShuffle, &MaskOps[0]);
6197 static bool MayFoldVectorLoad(SDValue V) {
6198 if (V.hasOneUse() && V.getOpcode() == ISD::BITCAST)
6199 V = V.getOperand(0);
6200 if (V.hasOneUse() && V.getOpcode() == ISD::SCALAR_TO_VECTOR)
6201 V = V.getOperand(0);
6202 if (V.hasOneUse() && V.getOpcode() == ISD::BUILD_VECTOR &&
6203 V.getNumOperands() == 2 && V.getOperand(1).getOpcode() == ISD::UNDEF)
6204 // BUILD_VECTOR (load), undef
6205 V = V.getOperand(0);
6211 // FIXME: the version above should always be used. Since there's
6212 // a bug where several vector shuffles can't be folded because the
6213 // DAG is not updated during lowering and a node claims to have two
6214 // uses while it only has one, use this version, and let isel match
6215 // another instruction if the load really happens to have more than
6216 // one use. Remove this version after this bug get fixed.
6217 // rdar://8434668, PR8156
6218 static bool RelaxedMayFoldVectorLoad(SDValue V) {
6219 if (V.hasOneUse() && V.getOpcode() == ISD::BITCAST)
6220 V = V.getOperand(0);
6221 if (V.hasOneUse() && V.getOpcode() == ISD::SCALAR_TO_VECTOR)
6222 V = V.getOperand(0);
6223 if (ISD::isNormalLoad(V.getNode()))
6229 SDValue getMOVDDup(SDValue &Op, DebugLoc &dl, SDValue V1, SelectionDAG &DAG) {
6230 EVT VT = Op.getValueType();
6232 // Canonizalize to v2f64.
6233 V1 = DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, V1);
6234 return DAG.getNode(ISD::BITCAST, dl, VT,
6235 getTargetShuffleNode(X86ISD::MOVDDUP, dl, MVT::v2f64,
6240 SDValue getMOVLowToHigh(SDValue &Op, DebugLoc &dl, SelectionDAG &DAG,
6242 SDValue V1 = Op.getOperand(0);
6243 SDValue V2 = Op.getOperand(1);
6244 EVT VT = Op.getValueType();
6246 assert(VT != MVT::v2i64 && "unsupported shuffle type");
6248 if (HasSSE2 && VT == MVT::v2f64)
6249 return getTargetShuffleNode(X86ISD::MOVLHPD, dl, VT, V1, V2, DAG);
6251 // v4f32 or v4i32: canonizalized to v4f32 (which is legal for SSE1)
6252 return DAG.getNode(ISD::BITCAST, dl, VT,
6253 getTargetShuffleNode(X86ISD::MOVLHPS, dl, MVT::v4f32,
6254 DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, V1),
6255 DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, V2), DAG));
6259 SDValue getMOVHighToLow(SDValue &Op, DebugLoc &dl, SelectionDAG &DAG) {
6260 SDValue V1 = Op.getOperand(0);
6261 SDValue V2 = Op.getOperand(1);
6262 EVT VT = Op.getValueType();
6264 assert((VT == MVT::v4i32 || VT == MVT::v4f32) &&
6265 "unsupported shuffle type");
6267 if (V2.getOpcode() == ISD::UNDEF)
6271 return getTargetShuffleNode(X86ISD::MOVHLPS, dl, VT, V1, V2, DAG);
6275 SDValue getMOVLP(SDValue &Op, DebugLoc &dl, SelectionDAG &DAG, bool HasSSE2) {
6276 SDValue V1 = Op.getOperand(0);
6277 SDValue V2 = Op.getOperand(1);
6278 EVT VT = Op.getValueType();
6279 unsigned NumElems = VT.getVectorNumElements();
6281 // Use MOVLPS and MOVLPD in case V1 or V2 are loads. During isel, the second
6282 // operand of these instructions is only memory, so check if there's a
6283 // potencial load folding here, otherwise use SHUFPS or MOVSD to match the
6285 bool CanFoldLoad = false;
6287 // Trivial case, when V2 comes from a load.
6288 if (MayFoldVectorLoad(V2))
6291 // When V1 is a load, it can be folded later into a store in isel, example:
6292 // (store (v4f32 (X86Movlps (load addr:$src1), VR128:$src2)), addr:$src1)
6294 // (MOVLPSmr addr:$src1, VR128:$src2)
6295 // So, recognize this potential and also use MOVLPS or MOVLPD
6296 else if (MayFoldVectorLoad(V1) && MayFoldIntoStore(Op))
6299 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
6301 if (HasSSE2 && NumElems == 2)
6302 return getTargetShuffleNode(X86ISD::MOVLPD, dl, VT, V1, V2, DAG);
6305 // If we don't care about the second element, procede to use movss.
6306 if (SVOp->getMaskElt(1) != -1)
6307 return getTargetShuffleNode(X86ISD::MOVLPS, dl, VT, V1, V2, DAG);
6310 // movl and movlp will both match v2i64, but v2i64 is never matched by
6311 // movl earlier because we make it strict to avoid messing with the movlp load
6312 // folding logic (see the code above getMOVLP call). Match it here then,
6313 // this is horrible, but will stay like this until we move all shuffle
6314 // matching to x86 specific nodes. Note that for the 1st condition all
6315 // types are matched with movsd.
6317 // FIXME: isMOVLMask should be checked and matched before getMOVLP,
6318 // as to remove this logic from here, as much as possible
6319 if (NumElems == 2 || !isMOVLMask(SVOp->getMask(), VT))
6320 return getTargetShuffleNode(X86ISD::MOVSD, dl, VT, V1, V2, DAG);
6321 return getTargetShuffleNode(X86ISD::MOVSS, dl, VT, V1, V2, DAG);
6324 assert(VT != MVT::v4i32 && "unsupported shuffle type");
6326 // Invert the operand order and use SHUFPS to match it.
6327 return getTargetShuffleNode(X86ISD::SHUFP, dl, VT, V2, V1,
6328 getShuffleSHUFImmediate(SVOp), DAG);
6332 X86TargetLowering::NormalizeVectorShuffle(SDValue Op, SelectionDAG &DAG) const {
6333 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
6334 EVT VT = Op.getValueType();
6335 DebugLoc dl = Op.getDebugLoc();
6336 SDValue V1 = Op.getOperand(0);
6337 SDValue V2 = Op.getOperand(1);
6339 if (isZeroShuffle(SVOp))
6340 return getZeroVector(VT, Subtarget, DAG, dl);
6342 // Handle splat operations
6343 if (SVOp->isSplat()) {
6344 unsigned NumElem = VT.getVectorNumElements();
6345 int Size = VT.getSizeInBits();
6347 // Use vbroadcast whenever the splat comes from a foldable load
6348 SDValue Broadcast = LowerVectorBroadcast(Op, DAG);
6349 if (Broadcast.getNode())
6352 // Handle splats by matching through known shuffle masks
6353 if ((Size == 128 && NumElem <= 4) ||
6354 (Size == 256 && NumElem < 8))
6357 // All remaning splats are promoted to target supported vector shuffles.
6358 return PromoteSplat(SVOp, DAG);
6361 // If the shuffle can be profitably rewritten as a narrower shuffle, then
6363 if (VT == MVT::v8i16 || VT == MVT::v16i8) {
6364 SDValue NewOp = RewriteAsNarrowerShuffle(SVOp, DAG, dl);
6365 if (NewOp.getNode())
6366 return DAG.getNode(ISD::BITCAST, dl, VT, NewOp);
6367 } else if ((VT == MVT::v4i32 ||
6368 (VT == MVT::v4f32 && Subtarget->hasSSE2()))) {
6369 // FIXME: Figure out a cleaner way to do this.
6370 // Try to make use of movq to zero out the top part.
6371 if (ISD::isBuildVectorAllZeros(V2.getNode())) {
6372 SDValue NewOp = RewriteAsNarrowerShuffle(SVOp, DAG, dl);
6373 if (NewOp.getNode()) {
6374 EVT NewVT = NewOp.getValueType();
6375 if (isCommutedMOVLMask(cast<ShuffleVectorSDNode>(NewOp)->getMask(),
6376 NewVT, true, false))
6377 return getVZextMovL(VT, NewVT, NewOp.getOperand(0),
6378 DAG, Subtarget, dl);
6380 } else if (ISD::isBuildVectorAllZeros(V1.getNode())) {
6381 SDValue NewOp = RewriteAsNarrowerShuffle(SVOp, DAG, dl);
6382 if (NewOp.getNode()) {
6383 EVT NewVT = NewOp.getValueType();
6384 if (isMOVLMask(cast<ShuffleVectorSDNode>(NewOp)->getMask(), NewVT))
6385 return getVZextMovL(VT, NewVT, NewOp.getOperand(1),
6386 DAG, Subtarget, dl);
6394 X86TargetLowering::LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) const {
6395 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
6396 SDValue V1 = Op.getOperand(0);
6397 SDValue V2 = Op.getOperand(1);
6398 EVT VT = Op.getValueType();
6399 DebugLoc dl = Op.getDebugLoc();
6400 unsigned NumElems = VT.getVectorNumElements();
6401 bool V1IsUndef = V1.getOpcode() == ISD::UNDEF;
6402 bool V2IsUndef = V2.getOpcode() == ISD::UNDEF;
6403 bool V1IsSplat = false;
6404 bool V2IsSplat = false;
6405 bool HasSSE2 = Subtarget->hasSSE2();
6406 bool HasAVX = Subtarget->hasAVX();
6407 bool HasAVX2 = Subtarget->hasAVX2();
6408 MachineFunction &MF = DAG.getMachineFunction();
6409 bool OptForSize = MF.getFunction()->hasFnAttr(Attribute::OptimizeForSize);
6411 assert(VT.getSizeInBits() != 64 && "Can't lower MMX shuffles");
6413 if (V1IsUndef && V2IsUndef)
6414 return DAG.getUNDEF(VT);
6416 assert(!V1IsUndef && "Op 1 of shuffle should not be undef");
6418 // Vector shuffle lowering takes 3 steps:
6420 // 1) Normalize the input vectors. Here splats, zeroed vectors, profitable
6421 // narrowing and commutation of operands should be handled.
6422 // 2) Matching of shuffles with known shuffle masks to x86 target specific
6424 // 3) Rewriting of unmatched masks into new generic shuffle operations,
6425 // so the shuffle can be broken into other shuffles and the legalizer can
6426 // try the lowering again.
6428 // The general idea is that no vector_shuffle operation should be left to
6429 // be matched during isel, all of them must be converted to a target specific
6432 // Normalize the input vectors. Here splats, zeroed vectors, profitable
6433 // narrowing and commutation of operands should be handled. The actual code
6434 // doesn't include all of those, work in progress...
6435 SDValue NewOp = NormalizeVectorShuffle(Op, DAG);
6436 if (NewOp.getNode())
6439 SmallVector<int, 8> M(SVOp->getMask().begin(), SVOp->getMask().end());
6441 // NOTE: isPSHUFDMask can also match both masks below (unpckl_undef and
6442 // unpckh_undef). Only use pshufd if speed is more important than size.
6443 if (OptForSize && isUNPCKL_v_undef_Mask(M, VT, HasAVX2))
6444 return getTargetShuffleNode(X86ISD::UNPCKL, dl, VT, V1, V1, DAG);
6445 if (OptForSize && isUNPCKH_v_undef_Mask(M, VT, HasAVX2))
6446 return getTargetShuffleNode(X86ISD::UNPCKH, dl, VT, V1, V1, DAG);
6448 if (isMOVDDUPMask(M, VT) && Subtarget->hasSSE3() &&
6449 V2IsUndef && RelaxedMayFoldVectorLoad(V1))
6450 return getMOVDDup(Op, dl, V1, DAG);
6452 if (isMOVHLPS_v_undef_Mask(M, VT))
6453 return getMOVHighToLow(Op, dl, DAG);
6455 // Use to match splats
6456 if (HasSSE2 && isUNPCKHMask(M, VT, HasAVX2) && V2IsUndef &&
6457 (VT == MVT::v2f64 || VT == MVT::v2i64))
6458 return getTargetShuffleNode(X86ISD::UNPCKH, dl, VT, V1, V1, DAG);
6460 if (isPSHUFDMask(M, VT)) {
6461 // The actual implementation will match the mask in the if above and then
6462 // during isel it can match several different instructions, not only pshufd
6463 // as its name says, sad but true, emulate the behavior for now...
6464 if (isMOVDDUPMask(M, VT) && ((VT == MVT::v4f32 || VT == MVT::v2i64)))
6465 return getTargetShuffleNode(X86ISD::MOVLHPS, dl, VT, V1, V1, DAG);
6467 unsigned TargetMask = getShuffleSHUFImmediate(SVOp);
6469 if (HasAVX && (VT == MVT::v4f32 || VT == MVT::v2f64))
6470 return getTargetShuffleNode(X86ISD::VPERMILP, dl, VT, V1, TargetMask, DAG);
6472 if (HasSSE2 && (VT == MVT::v4f32 || VT == MVT::v4i32))
6473 return getTargetShuffleNode(X86ISD::PSHUFD, dl, VT, V1, TargetMask, DAG);
6475 return getTargetShuffleNode(X86ISD::SHUFP, dl, VT, V1, V1,
6479 // Check if this can be converted into a logical shift.
6480 bool isLeft = false;
6483 bool isShift = HasSSE2 && isVectorShift(SVOp, DAG, isLeft, ShVal, ShAmt);
6484 if (isShift && ShVal.hasOneUse()) {
6485 // If the shifted value has multiple uses, it may be cheaper to use
6486 // v_set0 + movlhps or movhlps, etc.
6487 EVT EltVT = VT.getVectorElementType();
6488 ShAmt *= EltVT.getSizeInBits();
6489 return getVShift(isLeft, VT, ShVal, ShAmt, DAG, *this, dl);
6492 if (isMOVLMask(M, VT)) {
6493 if (ISD::isBuildVectorAllZeros(V1.getNode()))
6494 return getVZextMovL(VT, VT, V2, DAG, Subtarget, dl);
6495 if (!isMOVLPMask(M, VT)) {
6496 if (HasSSE2 && (VT == MVT::v2i64 || VT == MVT::v2f64))
6497 return getTargetShuffleNode(X86ISD::MOVSD, dl, VT, V1, V2, DAG);
6499 if (VT == MVT::v4i32 || VT == MVT::v4f32)
6500 return getTargetShuffleNode(X86ISD::MOVSS, dl, VT, V1, V2, DAG);
6504 // FIXME: fold these into legal mask.
6505 if (isMOVLHPSMask(M, VT) && !isUNPCKLMask(M, VT, HasAVX2))
6506 return getMOVLowToHigh(Op, dl, DAG, HasSSE2);
6508 if (isMOVHLPSMask(M, VT))
6509 return getMOVHighToLow(Op, dl, DAG);
6511 if (V2IsUndef && isMOVSHDUPMask(M, VT, Subtarget))
6512 return getTargetShuffleNode(X86ISD::MOVSHDUP, dl, VT, V1, DAG);
6514 if (V2IsUndef && isMOVSLDUPMask(M, VT, Subtarget))
6515 return getTargetShuffleNode(X86ISD::MOVSLDUP, dl, VT, V1, DAG);
6517 if (isMOVLPMask(M, VT))
6518 return getMOVLP(Op, dl, DAG, HasSSE2);
6520 if (ShouldXformToMOVHLPS(M, VT) ||
6521 ShouldXformToMOVLP(V1.getNode(), V2.getNode(), M, VT))
6522 return CommuteVectorShuffle(SVOp, DAG);
6525 // No better options. Use a vshldq / vsrldq.
6526 EVT EltVT = VT.getVectorElementType();
6527 ShAmt *= EltVT.getSizeInBits();
6528 return getVShift(isLeft, VT, ShVal, ShAmt, DAG, *this, dl);
6531 bool Commuted = false;
6532 // FIXME: This should also accept a bitcast of a splat? Be careful, not
6533 // 1,1,1,1 -> v8i16 though.
6534 V1IsSplat = isSplatVector(V1.getNode());
6535 V2IsSplat = isSplatVector(V2.getNode());
6537 // Canonicalize the splat or undef, if present, to be on the RHS.
6538 if (!V2IsUndef && V1IsSplat && !V2IsSplat) {
6539 CommuteVectorShuffleMask(M, NumElems);
6541 std::swap(V1IsSplat, V2IsSplat);
6545 if (isCommutedMOVLMask(M, VT, V2IsSplat, V2IsUndef)) {
6546 // Shuffling low element of v1 into undef, just return v1.
6549 // If V2 is a splat, the mask may be malformed such as <4,3,3,3>, which
6550 // the instruction selector will not match, so get a canonical MOVL with
6551 // swapped operands to undo the commute.
6552 return getMOVL(DAG, dl, VT, V2, V1);
6555 if (isUNPCKLMask(M, VT, HasAVX2))
6556 return getTargetShuffleNode(X86ISD::UNPCKL, dl, VT, V1, V2, DAG);
6558 if (isUNPCKHMask(M, VT, HasAVX2))
6559 return getTargetShuffleNode(X86ISD::UNPCKH, dl, VT, V1, V2, DAG);
6562 // Normalize mask so all entries that point to V2 points to its first
6563 // element then try to match unpck{h|l} again. If match, return a
6564 // new vector_shuffle with the corrected mask.p
6565 SmallVector<int, 8> NewMask(M.begin(), M.end());
6566 NormalizeMask(NewMask, NumElems);
6567 if (isUNPCKLMask(NewMask, VT, HasAVX2, true)) {
6568 return getTargetShuffleNode(X86ISD::UNPCKL, dl, VT, V1, V2, DAG);
6569 } else if (isUNPCKHMask(NewMask, VT, HasAVX2, true)) {
6570 return getTargetShuffleNode(X86ISD::UNPCKH, dl, VT, V1, V2, DAG);
6575 // Commute is back and try unpck* again.
6576 // FIXME: this seems wrong.
6577 CommuteVectorShuffleMask(M, NumElems);
6579 std::swap(V1IsSplat, V2IsSplat);
6582 if (isUNPCKLMask(M, VT, HasAVX2))
6583 return getTargetShuffleNode(X86ISD::UNPCKL, dl, VT, V1, V2, DAG);
6585 if (isUNPCKHMask(M, VT, HasAVX2))
6586 return getTargetShuffleNode(X86ISD::UNPCKH, dl, VT, V1, V2, DAG);
6589 // Normalize the node to match x86 shuffle ops if needed
6590 if (!V2IsUndef && (isSHUFPMask(M, VT, HasAVX, /* Commuted */ true)))
6591 return CommuteVectorShuffle(SVOp, DAG);
6593 // The checks below are all present in isShuffleMaskLegal, but they are
6594 // inlined here right now to enable us to directly emit target specific
6595 // nodes, and remove one by one until they don't return Op anymore.
6597 if (isPALIGNRMask(M, VT, Subtarget))
6598 return getTargetShuffleNode(X86ISD::PALIGN, dl, VT, V1, V2,
6599 getShufflePALIGNRImmediate(SVOp),
6602 if (ShuffleVectorSDNode::isSplatMask(&M[0], VT) &&
6603 SVOp->getSplatIndex() == 0 && V2IsUndef) {
6604 if (VT == MVT::v2f64 || VT == MVT::v2i64)
6605 return getTargetShuffleNode(X86ISD::UNPCKL, dl, VT, V1, V1, DAG);
6608 if (isPSHUFHWMask(M, VT))
6609 return getTargetShuffleNode(X86ISD::PSHUFHW, dl, VT, V1,
6610 getShufflePSHUFHWImmediate(SVOp),
6613 if (isPSHUFLWMask(M, VT))
6614 return getTargetShuffleNode(X86ISD::PSHUFLW, dl, VT, V1,
6615 getShufflePSHUFLWImmediate(SVOp),
6618 if (isSHUFPMask(M, VT, HasAVX))
6619 return getTargetShuffleNode(X86ISD::SHUFP, dl, VT, V1, V2,
6620 getShuffleSHUFImmediate(SVOp), DAG);
6622 if (isUNPCKL_v_undef_Mask(M, VT, HasAVX2))
6623 return getTargetShuffleNode(X86ISD::UNPCKL, dl, VT, V1, V1, DAG);
6624 if (isUNPCKH_v_undef_Mask(M, VT, HasAVX2))
6625 return getTargetShuffleNode(X86ISD::UNPCKH, dl, VT, V1, V1, DAG);
6627 //===--------------------------------------------------------------------===//
6628 // Generate target specific nodes for 128 or 256-bit shuffles only
6629 // supported in the AVX instruction set.
6632 // Handle VMOVDDUPY permutations
6633 if (V2IsUndef && isMOVDDUPYMask(M, VT, HasAVX))
6634 return getTargetShuffleNode(X86ISD::MOVDDUP, dl, VT, V1, DAG);
6636 // Handle VPERMILPS/D* permutations
6637 if (isVPERMILPMask(M, VT, HasAVX)) {
6638 if (HasAVX2 && VT == MVT::v8i32)
6639 return getTargetShuffleNode(X86ISD::PSHUFD, dl, VT, V1,
6640 getShuffleSHUFImmediate(SVOp), DAG);
6641 return getTargetShuffleNode(X86ISD::VPERMILP, dl, VT, V1,
6642 getShuffleSHUFImmediate(SVOp), DAG);
6645 // Handle VPERM2F128/VPERM2I128 permutations
6646 if (isVPERM2X128Mask(M, VT, HasAVX))
6647 return getTargetShuffleNode(X86ISD::VPERM2X128, dl, VT, V1,
6648 V2, getShuffleVPERM2X128Immediate(SVOp), DAG);
6650 SDValue BlendOp = LowerVECTOR_SHUFFLEtoBlend(Op, Subtarget, DAG);
6651 if (BlendOp.getNode())
6654 if (V2IsUndef && HasAVX2 && (VT == MVT::v8i32 || VT == MVT::v8f32)) {
6655 SmallVector<SDValue, 8> permclMask;
6656 for (unsigned i = 0; i != 8; ++i) {
6657 permclMask.push_back(DAG.getConstant((M[i]>=0) ? M[i] : 0, MVT::i32));
6659 SDValue Mask = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v8i32,
6661 // Bitcast is for VPERMPS since mask is v8i32 but node takes v8f32
6662 return DAG.getNode(X86ISD::VPERMV, dl, VT,
6663 DAG.getNode(ISD::BITCAST, dl, VT, Mask), V1);
6666 if (V2IsUndef && HasAVX2 && (VT == MVT::v4i64 || VT == MVT::v4f64))
6667 return getTargetShuffleNode(X86ISD::VPERMI, dl, VT, V1,
6668 getShuffleCLImmediate(SVOp), DAG);
6671 //===--------------------------------------------------------------------===//
6672 // Since no target specific shuffle was selected for this generic one,
6673 // lower it into other known shuffles. FIXME: this isn't true yet, but
6674 // this is the plan.
6677 // Handle v8i16 specifically since SSE can do byte extraction and insertion.
6678 if (VT == MVT::v8i16) {
6679 SDValue NewOp = LowerVECTOR_SHUFFLEv8i16(Op, DAG);
6680 if (NewOp.getNode())
6684 if (VT == MVT::v16i8) {
6685 SDValue NewOp = LowerVECTOR_SHUFFLEv16i8(SVOp, DAG, *this);
6686 if (NewOp.getNode())
6690 // Handle all 128-bit wide vectors with 4 elements, and match them with
6691 // several different shuffle types.
6692 if (NumElems == 4 && VT.getSizeInBits() == 128)
6693 return LowerVECTOR_SHUFFLE_128v4(SVOp, DAG);
6695 // Handle general 256-bit shuffles
6696 if (VT.is256BitVector())
6697 return LowerVECTOR_SHUFFLE_256(SVOp, DAG);
6703 X86TargetLowering::LowerEXTRACT_VECTOR_ELT_SSE4(SDValue Op,
6704 SelectionDAG &DAG) const {
6705 EVT VT = Op.getValueType();
6706 DebugLoc dl = Op.getDebugLoc();
6708 if (Op.getOperand(0).getValueType().getSizeInBits() != 128)
6711 if (VT.getSizeInBits() == 8) {
6712 SDValue Extract = DAG.getNode(X86ISD::PEXTRB, dl, MVT::i32,
6713 Op.getOperand(0), Op.getOperand(1));
6714 SDValue Assert = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Extract,
6715 DAG.getValueType(VT));
6716 return DAG.getNode(ISD::TRUNCATE, dl, VT, Assert);
6717 } else if (VT.getSizeInBits() == 16) {
6718 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
6719 // If Idx is 0, it's cheaper to do a move instead of a pextrw.
6721 return DAG.getNode(ISD::TRUNCATE, dl, MVT::i16,
6722 DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32,
6723 DAG.getNode(ISD::BITCAST, dl,
6727 SDValue Extract = DAG.getNode(X86ISD::PEXTRW, dl, MVT::i32,
6728 Op.getOperand(0), Op.getOperand(1));
6729 SDValue Assert = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Extract,
6730 DAG.getValueType(VT));
6731 return DAG.getNode(ISD::TRUNCATE, dl, VT, Assert);
6732 } else if (VT == MVT::f32) {
6733 // EXTRACTPS outputs to a GPR32 register which will require a movd to copy
6734 // the result back to FR32 register. It's only worth matching if the
6735 // result has a single use which is a store or a bitcast to i32. And in
6736 // the case of a store, it's not worth it if the index is a constant 0,
6737 // because a MOVSSmr can be used instead, which is smaller and faster.
6738 if (!Op.hasOneUse())
6740 SDNode *User = *Op.getNode()->use_begin();
6741 if ((User->getOpcode() != ISD::STORE ||
6742 (isa<ConstantSDNode>(Op.getOperand(1)) &&
6743 cast<ConstantSDNode>(Op.getOperand(1))->isNullValue())) &&
6744 (User->getOpcode() != ISD::BITCAST ||
6745 User->getValueType(0) != MVT::i32))
6747 SDValue Extract = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32,
6748 DAG.getNode(ISD::BITCAST, dl, MVT::v4i32,
6751 return DAG.getNode(ISD::BITCAST, dl, MVT::f32, Extract);
6752 } else if (VT == MVT::i32 || VT == MVT::i64) {
6753 // ExtractPS/pextrq works with constant index.
6754 if (isa<ConstantSDNode>(Op.getOperand(1)))
6762 X86TargetLowering::LowerEXTRACT_VECTOR_ELT(SDValue Op,
6763 SelectionDAG &DAG) const {
6764 if (!isa<ConstantSDNode>(Op.getOperand(1)))
6767 SDValue Vec = Op.getOperand(0);
6768 EVT VecVT = Vec.getValueType();
6770 // If this is a 256-bit vector result, first extract the 128-bit vector and
6771 // then extract the element from the 128-bit vector.
6772 if (VecVT.getSizeInBits() == 256) {
6773 DebugLoc dl = Op.getNode()->getDebugLoc();
6774 unsigned NumElems = VecVT.getVectorNumElements();
6775 SDValue Idx = Op.getOperand(1);
6776 unsigned IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
6778 // Get the 128-bit vector.
6779 bool Upper = IdxVal >= NumElems/2;
6780 Vec = Extract128BitVector(Vec,
6781 DAG.getConstant(Upper ? NumElems/2 : 0, MVT::i32), DAG, dl);
6783 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, Op.getValueType(), Vec,
6784 Upper ? DAG.getConstant(IdxVal-NumElems/2, MVT::i32) : Idx);
6787 assert(Vec.getValueSizeInBits() <= 128 && "Unexpected vector length");
6789 if (Subtarget->hasSSE41()) {
6790 SDValue Res = LowerEXTRACT_VECTOR_ELT_SSE4(Op, DAG);
6795 EVT VT = Op.getValueType();
6796 DebugLoc dl = Op.getDebugLoc();
6797 // TODO: handle v16i8.
6798 if (VT.getSizeInBits() == 16) {
6799 SDValue Vec = Op.getOperand(0);
6800 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
6802 return DAG.getNode(ISD::TRUNCATE, dl, MVT::i16,
6803 DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32,
6804 DAG.getNode(ISD::BITCAST, dl,
6807 // Transform it so it match pextrw which produces a 32-bit result.
6808 EVT EltVT = MVT::i32;
6809 SDValue Extract = DAG.getNode(X86ISD::PEXTRW, dl, EltVT,
6810 Op.getOperand(0), Op.getOperand(1));
6811 SDValue Assert = DAG.getNode(ISD::AssertZext, dl, EltVT, Extract,
6812 DAG.getValueType(VT));
6813 return DAG.getNode(ISD::TRUNCATE, dl, VT, Assert);
6814 } else if (VT.getSizeInBits() == 32) {
6815 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
6819 // SHUFPS the element to the lowest double word, then movss.
6820 int Mask[4] = { static_cast<int>(Idx), -1, -1, -1 };
6821 EVT VVT = Op.getOperand(0).getValueType();
6822 SDValue Vec = DAG.getVectorShuffle(VVT, dl, Op.getOperand(0),
6823 DAG.getUNDEF(VVT), Mask);
6824 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, VT, Vec,
6825 DAG.getIntPtrConstant(0));
6826 } else if (VT.getSizeInBits() == 64) {
6827 // FIXME: .td only matches this for <2 x f64>, not <2 x i64> on 32b
6828 // FIXME: seems like this should be unnecessary if mov{h,l}pd were taught
6829 // to match extract_elt for f64.
6830 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
6834 // UNPCKHPD the element to the lowest double word, then movsd.
6835 // Note if the lower 64 bits of the result of the UNPCKHPD is then stored
6836 // to a f64mem, the whole operation is folded into a single MOVHPDmr.
6837 int Mask[2] = { 1, -1 };
6838 EVT VVT = Op.getOperand(0).getValueType();
6839 SDValue Vec = DAG.getVectorShuffle(VVT, dl, Op.getOperand(0),
6840 DAG.getUNDEF(VVT), Mask);
6841 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, VT, Vec,
6842 DAG.getIntPtrConstant(0));
6849 X86TargetLowering::LowerINSERT_VECTOR_ELT_SSE4(SDValue Op,
6850 SelectionDAG &DAG) const {
6851 EVT VT = Op.getValueType();
6852 EVT EltVT = VT.getVectorElementType();
6853 DebugLoc dl = Op.getDebugLoc();
6855 SDValue N0 = Op.getOperand(0);
6856 SDValue N1 = Op.getOperand(1);
6857 SDValue N2 = Op.getOperand(2);
6859 if (VT.getSizeInBits() == 256)
6862 if ((EltVT.getSizeInBits() == 8 || EltVT.getSizeInBits() == 16) &&
6863 isa<ConstantSDNode>(N2)) {
6865 if (VT == MVT::v8i16)
6866 Opc = X86ISD::PINSRW;
6867 else if (VT == MVT::v16i8)
6868 Opc = X86ISD::PINSRB;
6870 Opc = X86ISD::PINSRB;
6872 // Transform it so it match pinsr{b,w} which expects a GR32 as its second
6874 if (N1.getValueType() != MVT::i32)
6875 N1 = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, N1);
6876 if (N2.getValueType() != MVT::i32)
6877 N2 = DAG.getIntPtrConstant(cast<ConstantSDNode>(N2)->getZExtValue());
6878 return DAG.getNode(Opc, dl, VT, N0, N1, N2);
6879 } else if (EltVT == MVT::f32 && isa<ConstantSDNode>(N2)) {
6880 // Bits [7:6] of the constant are the source select. This will always be
6881 // zero here. The DAG Combiner may combine an extract_elt index into these
6882 // bits. For example (insert (extract, 3), 2) could be matched by putting
6883 // the '3' into bits [7:6] of X86ISD::INSERTPS.
6884 // Bits [5:4] of the constant are the destination select. This is the
6885 // value of the incoming immediate.
6886 // Bits [3:0] of the constant are the zero mask. The DAG Combiner may
6887 // combine either bitwise AND or insert of float 0.0 to set these bits.
6888 N2 = DAG.getIntPtrConstant(cast<ConstantSDNode>(N2)->getZExtValue() << 4);
6889 // Create this as a scalar to vector..
6890 N1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4f32, N1);
6891 return DAG.getNode(X86ISD::INSERTPS, dl, VT, N0, N1, N2);
6892 } else if ((EltVT == MVT::i32 || EltVT == MVT::i64) &&
6893 isa<ConstantSDNode>(N2)) {
6894 // PINSR* works with constant index.
6901 X86TargetLowering::LowerINSERT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) const {
6902 EVT VT = Op.getValueType();
6903 EVT EltVT = VT.getVectorElementType();
6905 DebugLoc dl = Op.getDebugLoc();
6906 SDValue N0 = Op.getOperand(0);
6907 SDValue N1 = Op.getOperand(1);
6908 SDValue N2 = Op.getOperand(2);
6910 // If this is a 256-bit vector result, first extract the 128-bit vector,
6911 // insert the element into the extracted half and then place it back.
6912 if (VT.getSizeInBits() == 256) {
6913 if (!isa<ConstantSDNode>(N2))
6916 // Get the desired 128-bit vector half.
6917 unsigned NumElems = VT.getVectorNumElements();
6918 unsigned IdxVal = cast<ConstantSDNode>(N2)->getZExtValue();
6919 bool Upper = IdxVal >= NumElems/2;
6920 SDValue Ins128Idx = DAG.getConstant(Upper ? NumElems/2 : 0, MVT::i32);
6921 SDValue V = Extract128BitVector(N0, Ins128Idx, DAG, dl);
6923 // Insert the element into the desired half.
6924 V = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, V.getValueType(), V,
6925 N1, Upper ? DAG.getConstant(IdxVal-NumElems/2, MVT::i32) : N2);
6927 // Insert the changed part back to the 256-bit vector
6928 return Insert128BitVector(N0, V, Ins128Idx, DAG, dl);
6931 if (Subtarget->hasSSE41())
6932 return LowerINSERT_VECTOR_ELT_SSE4(Op, DAG);
6934 if (EltVT == MVT::i8)
6937 if (EltVT.getSizeInBits() == 16 && isa<ConstantSDNode>(N2)) {
6938 // Transform it so it match pinsrw which expects a 16-bit value in a GR32
6939 // as its second argument.
6940 if (N1.getValueType() != MVT::i32)
6941 N1 = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, N1);
6942 if (N2.getValueType() != MVT::i32)
6943 N2 = DAG.getIntPtrConstant(cast<ConstantSDNode>(N2)->getZExtValue());
6944 return DAG.getNode(X86ISD::PINSRW, dl, VT, N0, N1, N2);
6950 X86TargetLowering::LowerSCALAR_TO_VECTOR(SDValue Op, SelectionDAG &DAG) const {
6951 LLVMContext *Context = DAG.getContext();
6952 DebugLoc dl = Op.getDebugLoc();
6953 EVT OpVT = Op.getValueType();
6955 // If this is a 256-bit vector result, first insert into a 128-bit
6956 // vector and then insert into the 256-bit vector.
6957 if (OpVT.getSizeInBits() > 128) {
6958 // Insert into a 128-bit vector.
6959 EVT VT128 = EVT::getVectorVT(*Context,
6960 OpVT.getVectorElementType(),
6961 OpVT.getVectorNumElements() / 2);
6963 Op = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT128, Op.getOperand(0));
6965 // Insert the 128-bit vector.
6966 return Insert128BitVector(DAG.getNode(ISD::UNDEF, dl, OpVT), Op,
6967 DAG.getConstant(0, MVT::i32),
6971 if (Op.getValueType() == MVT::v1i64 &&
6972 Op.getOperand(0).getValueType() == MVT::i64)
6973 return DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v1i64, Op.getOperand(0));
6975 SDValue AnyExt = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, Op.getOperand(0));
6976 assert(Op.getValueType().getSimpleVT().getSizeInBits() == 128 &&
6977 "Expected an SSE type!");
6978 return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(),
6979 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32,AnyExt));
6982 // Lower a node with an EXTRACT_SUBVECTOR opcode. This may result in
6983 // a simple subregister reference or explicit instructions to grab
6984 // upper bits of a vector.
6986 X86TargetLowering::LowerEXTRACT_SUBVECTOR(SDValue Op, SelectionDAG &DAG) const {
6987 if (Subtarget->hasAVX()) {
6988 DebugLoc dl = Op.getNode()->getDebugLoc();
6989 SDValue Vec = Op.getNode()->getOperand(0);
6990 SDValue Idx = Op.getNode()->getOperand(1);
6992 if (Op.getNode()->getValueType(0).getSizeInBits() == 128
6993 && Vec.getNode()->getValueType(0).getSizeInBits() == 256) {
6994 return Extract128BitVector(Vec, Idx, DAG, dl);
7000 // Lower a node with an INSERT_SUBVECTOR opcode. This may result in a
7001 // simple superregister reference or explicit instructions to insert
7002 // the upper bits of a vector.
7004 X86TargetLowering::LowerINSERT_SUBVECTOR(SDValue Op, SelectionDAG &DAG) const {
7005 if (Subtarget->hasAVX()) {
7006 DebugLoc dl = Op.getNode()->getDebugLoc();
7007 SDValue Vec = Op.getNode()->getOperand(0);
7008 SDValue SubVec = Op.getNode()->getOperand(1);
7009 SDValue Idx = Op.getNode()->getOperand(2);
7011 if (Op.getNode()->getValueType(0).getSizeInBits() == 256
7012 && SubVec.getNode()->getValueType(0).getSizeInBits() == 128) {
7013 return Insert128BitVector(Vec, SubVec, Idx, DAG, dl);
7019 // ConstantPool, JumpTable, GlobalAddress, and ExternalSymbol are lowered as
7020 // their target countpart wrapped in the X86ISD::Wrapper node. Suppose N is
7021 // one of the above mentioned nodes. It has to be wrapped because otherwise
7022 // Select(N) returns N. So the raw TargetGlobalAddress nodes, etc. can only
7023 // be used to form addressing mode. These wrapped nodes will be selected
7026 X86TargetLowering::LowerConstantPool(SDValue Op, SelectionDAG &DAG) const {
7027 ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
7029 // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
7031 unsigned char OpFlag = 0;
7032 unsigned WrapperKind = X86ISD::Wrapper;
7033 CodeModel::Model M = getTargetMachine().getCodeModel();
7035 if (Subtarget->isPICStyleRIPRel() &&
7036 (M == CodeModel::Small || M == CodeModel::Kernel))
7037 WrapperKind = X86ISD::WrapperRIP;
7038 else if (Subtarget->isPICStyleGOT())
7039 OpFlag = X86II::MO_GOTOFF;
7040 else if (Subtarget->isPICStyleStubPIC())
7041 OpFlag = X86II::MO_PIC_BASE_OFFSET;
7043 SDValue Result = DAG.getTargetConstantPool(CP->getConstVal(), getPointerTy(),
7045 CP->getOffset(), OpFlag);
7046 DebugLoc DL = CP->getDebugLoc();
7047 Result = DAG.getNode(WrapperKind, DL, getPointerTy(), Result);
7048 // With PIC, the address is actually $g + Offset.
7050 Result = DAG.getNode(ISD::ADD, DL, getPointerTy(),
7051 DAG.getNode(X86ISD::GlobalBaseReg,
7052 DebugLoc(), getPointerTy()),
7059 SDValue X86TargetLowering::LowerJumpTable(SDValue Op, SelectionDAG &DAG) const {
7060 JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
7062 // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
7064 unsigned char OpFlag = 0;
7065 unsigned WrapperKind = X86ISD::Wrapper;
7066 CodeModel::Model M = getTargetMachine().getCodeModel();
7068 if (Subtarget->isPICStyleRIPRel() &&
7069 (M == CodeModel::Small || M == CodeModel::Kernel))
7070 WrapperKind = X86ISD::WrapperRIP;
7071 else if (Subtarget->isPICStyleGOT())
7072 OpFlag = X86II::MO_GOTOFF;
7073 else if (Subtarget->isPICStyleStubPIC())
7074 OpFlag = X86II::MO_PIC_BASE_OFFSET;
7076 SDValue Result = DAG.getTargetJumpTable(JT->getIndex(), getPointerTy(),
7078 DebugLoc DL = JT->getDebugLoc();
7079 Result = DAG.getNode(WrapperKind, DL, getPointerTy(), Result);
7081 // With PIC, the address is actually $g + Offset.
7083 Result = DAG.getNode(ISD::ADD, DL, getPointerTy(),
7084 DAG.getNode(X86ISD::GlobalBaseReg,
7085 DebugLoc(), getPointerTy()),
7092 X86TargetLowering::LowerExternalSymbol(SDValue Op, SelectionDAG &DAG) const {
7093 const char *Sym = cast<ExternalSymbolSDNode>(Op)->getSymbol();
7095 // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
7097 unsigned char OpFlag = 0;
7098 unsigned WrapperKind = X86ISD::Wrapper;
7099 CodeModel::Model M = getTargetMachine().getCodeModel();
7101 if (Subtarget->isPICStyleRIPRel() &&
7102 (M == CodeModel::Small || M == CodeModel::Kernel)) {
7103 if (Subtarget->isTargetDarwin() || Subtarget->isTargetELF())
7104 OpFlag = X86II::MO_GOTPCREL;
7105 WrapperKind = X86ISD::WrapperRIP;
7106 } else if (Subtarget->isPICStyleGOT()) {
7107 OpFlag = X86II::MO_GOT;
7108 } else if (Subtarget->isPICStyleStubPIC()) {
7109 OpFlag = X86II::MO_DARWIN_NONLAZY_PIC_BASE;
7110 } else if (Subtarget->isPICStyleStubNoDynamic()) {
7111 OpFlag = X86II::MO_DARWIN_NONLAZY;
7114 SDValue Result = DAG.getTargetExternalSymbol(Sym, getPointerTy(), OpFlag);
7116 DebugLoc DL = Op.getDebugLoc();
7117 Result = DAG.getNode(WrapperKind, DL, getPointerTy(), Result);
7120 // With PIC, the address is actually $g + Offset.
7121 if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
7122 !Subtarget->is64Bit()) {
7123 Result = DAG.getNode(ISD::ADD, DL, getPointerTy(),
7124 DAG.getNode(X86ISD::GlobalBaseReg,
7125 DebugLoc(), getPointerTy()),
7129 // For symbols that require a load from a stub to get the address, emit the
7131 if (isGlobalStubReference(OpFlag))
7132 Result = DAG.getLoad(getPointerTy(), DL, DAG.getEntryNode(), Result,
7133 MachinePointerInfo::getGOT(), false, false, false, 0);
7139 X86TargetLowering::LowerBlockAddress(SDValue Op, SelectionDAG &DAG) const {
7140 // Create the TargetBlockAddressAddress node.
7141 unsigned char OpFlags =
7142 Subtarget->ClassifyBlockAddressReference();
7143 CodeModel::Model M = getTargetMachine().getCodeModel();
7144 const BlockAddress *BA = cast<BlockAddressSDNode>(Op)->getBlockAddress();
7145 DebugLoc dl = Op.getDebugLoc();
7146 SDValue Result = DAG.getBlockAddress(BA, getPointerTy(),
7147 /*isTarget=*/true, OpFlags);
7149 if (Subtarget->isPICStyleRIPRel() &&
7150 (M == CodeModel::Small || M == CodeModel::Kernel))
7151 Result = DAG.getNode(X86ISD::WrapperRIP, dl, getPointerTy(), Result);
7153 Result = DAG.getNode(X86ISD::Wrapper, dl, getPointerTy(), Result);
7155 // With PIC, the address is actually $g + Offset.
7156 if (isGlobalRelativeToPICBase(OpFlags)) {
7157 Result = DAG.getNode(ISD::ADD, dl, getPointerTy(),
7158 DAG.getNode(X86ISD::GlobalBaseReg, dl, getPointerTy()),
7166 X86TargetLowering::LowerGlobalAddress(const GlobalValue *GV, DebugLoc dl,
7168 SelectionDAG &DAG) const {
7169 // Create the TargetGlobalAddress node, folding in the constant
7170 // offset if it is legal.
7171 unsigned char OpFlags =
7172 Subtarget->ClassifyGlobalReference(GV, getTargetMachine());
7173 CodeModel::Model M = getTargetMachine().getCodeModel();
7175 if (OpFlags == X86II::MO_NO_FLAG &&
7176 X86::isOffsetSuitableForCodeModel(Offset, M)) {
7177 // A direct static reference to a global.
7178 Result = DAG.getTargetGlobalAddress(GV, dl, getPointerTy(), Offset);
7181 Result = DAG.getTargetGlobalAddress(GV, dl, getPointerTy(), 0, OpFlags);
7184 if (Subtarget->isPICStyleRIPRel() &&
7185 (M == CodeModel::Small || M == CodeModel::Kernel))
7186 Result = DAG.getNode(X86ISD::WrapperRIP, dl, getPointerTy(), Result);
7188 Result = DAG.getNode(X86ISD::Wrapper, dl, getPointerTy(), Result);
7190 // With PIC, the address is actually $g + Offset.
7191 if (isGlobalRelativeToPICBase(OpFlags)) {
7192 Result = DAG.getNode(ISD::ADD, dl, getPointerTy(),
7193 DAG.getNode(X86ISD::GlobalBaseReg, dl, getPointerTy()),
7197 // For globals that require a load from a stub to get the address, emit the
7199 if (isGlobalStubReference(OpFlags))
7200 Result = DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(), Result,
7201 MachinePointerInfo::getGOT(), false, false, false, 0);
7203 // If there was a non-zero offset that we didn't fold, create an explicit
7206 Result = DAG.getNode(ISD::ADD, dl, getPointerTy(), Result,
7207 DAG.getConstant(Offset, getPointerTy()));
7213 X86TargetLowering::LowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const {
7214 const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
7215 int64_t Offset = cast<GlobalAddressSDNode>(Op)->getOffset();
7216 return LowerGlobalAddress(GV, Op.getDebugLoc(), Offset, DAG);
7220 GetTLSADDR(SelectionDAG &DAG, SDValue Chain, GlobalAddressSDNode *GA,
7221 SDValue *InFlag, const EVT PtrVT, unsigned ReturnReg,
7222 unsigned char OperandFlags) {
7223 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
7224 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
7225 DebugLoc dl = GA->getDebugLoc();
7226 SDValue TGA = DAG.getTargetGlobalAddress(GA->getGlobal(), dl,
7227 GA->getValueType(0),
7231 SDValue Ops[] = { Chain, TGA, *InFlag };
7232 Chain = DAG.getNode(X86ISD::TLSADDR, dl, NodeTys, Ops, 3);
7234 SDValue Ops[] = { Chain, TGA };
7235 Chain = DAG.getNode(X86ISD::TLSADDR, dl, NodeTys, Ops, 2);
7238 // TLSADDR will be codegen'ed as call. Inform MFI that function has calls.
7239 MFI->setAdjustsStack(true);
7241 SDValue Flag = Chain.getValue(1);
7242 return DAG.getCopyFromReg(Chain, dl, ReturnReg, PtrVT, Flag);
7245 // Lower ISD::GlobalTLSAddress using the "general dynamic" model, 32 bit
7247 LowerToTLSGeneralDynamicModel32(GlobalAddressSDNode *GA, SelectionDAG &DAG,
7250 DebugLoc dl = GA->getDebugLoc(); // ? function entry point might be better
7251 SDValue Chain = DAG.getCopyToReg(DAG.getEntryNode(), dl, X86::EBX,
7252 DAG.getNode(X86ISD::GlobalBaseReg,
7253 DebugLoc(), PtrVT), InFlag);
7254 InFlag = Chain.getValue(1);
7256 return GetTLSADDR(DAG, Chain, GA, &InFlag, PtrVT, X86::EAX, X86II::MO_TLSGD);
7259 // Lower ISD::GlobalTLSAddress using the "general dynamic" model, 64 bit
7261 LowerToTLSGeneralDynamicModel64(GlobalAddressSDNode *GA, SelectionDAG &DAG,
7263 return GetTLSADDR(DAG, DAG.getEntryNode(), GA, NULL, PtrVT,
7264 X86::RAX, X86II::MO_TLSGD);
7267 // Lower ISD::GlobalTLSAddress using the "initial exec" (for no-pic) or
7268 // "local exec" model.
7269 static SDValue LowerToTLSExecModel(GlobalAddressSDNode *GA, SelectionDAG &DAG,
7270 const EVT PtrVT, TLSModel::Model model,
7272 DebugLoc dl = GA->getDebugLoc();
7274 // Get the Thread Pointer, which is %gs:0 (32-bit) or %fs:0 (64-bit).
7275 Value *Ptr = Constant::getNullValue(Type::getInt8PtrTy(*DAG.getContext(),
7276 is64Bit ? 257 : 256));
7278 SDValue ThreadPointer = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(),
7279 DAG.getIntPtrConstant(0),
7280 MachinePointerInfo(Ptr),
7281 false, false, false, 0);
7283 unsigned char OperandFlags = 0;
7284 // Most TLS accesses are not RIP relative, even on x86-64. One exception is
7286 unsigned WrapperKind = X86ISD::Wrapper;
7287 if (model == TLSModel::LocalExec) {
7288 OperandFlags = is64Bit ? X86II::MO_TPOFF : X86II::MO_NTPOFF;
7289 } else if (is64Bit) {
7290 assert(model == TLSModel::InitialExec);
7291 OperandFlags = X86II::MO_GOTTPOFF;
7292 WrapperKind = X86ISD::WrapperRIP;
7294 assert(model == TLSModel::InitialExec);
7295 OperandFlags = X86II::MO_INDNTPOFF;
7298 // emit "addl x@ntpoff,%eax" (local exec) or "addl x@indntpoff,%eax" (initial
7300 SDValue TGA = DAG.getTargetGlobalAddress(GA->getGlobal(), dl,
7301 GA->getValueType(0),
7302 GA->getOffset(), OperandFlags);
7303 SDValue Offset = DAG.getNode(WrapperKind, dl, PtrVT, TGA);
7305 if (model == TLSModel::InitialExec)
7306 Offset = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), Offset,
7307 MachinePointerInfo::getGOT(), false, false, false, 0);
7309 // The address of the thread local variable is the add of the thread
7310 // pointer with the offset of the variable.
7311 return DAG.getNode(ISD::ADD, dl, PtrVT, ThreadPointer, Offset);
7315 X86TargetLowering::LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const {
7317 GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op);
7318 const GlobalValue *GV = GA->getGlobal();
7320 if (Subtarget->isTargetELF()) {
7321 // TODO: implement the "local dynamic" model
7322 // TODO: implement the "initial exec"model for pic executables
7324 // If GV is an alias then use the aliasee for determining
7325 // thread-localness.
7326 if (const GlobalAlias *GA = dyn_cast<GlobalAlias>(GV))
7327 GV = GA->resolveAliasedGlobal(false);
7329 TLSModel::Model model = getTargetMachine().getTLSModel(GV);
7332 case TLSModel::GeneralDynamic:
7333 case TLSModel::LocalDynamic: // not implemented
7334 if (Subtarget->is64Bit())
7335 return LowerToTLSGeneralDynamicModel64(GA, DAG, getPointerTy());
7336 return LowerToTLSGeneralDynamicModel32(GA, DAG, getPointerTy());
7338 case TLSModel::InitialExec:
7339 case TLSModel::LocalExec:
7340 return LowerToTLSExecModel(GA, DAG, getPointerTy(), model,
7341 Subtarget->is64Bit());
7343 } else if (Subtarget->isTargetDarwin()) {
7344 // Darwin only has one model of TLS. Lower to that.
7345 unsigned char OpFlag = 0;
7346 unsigned WrapperKind = Subtarget->isPICStyleRIPRel() ?
7347 X86ISD::WrapperRIP : X86ISD::Wrapper;
7349 // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
7351 bool PIC32 = (getTargetMachine().getRelocationModel() == Reloc::PIC_) &&
7352 !Subtarget->is64Bit();
7354 OpFlag = X86II::MO_TLVP_PIC_BASE;
7356 OpFlag = X86II::MO_TLVP;
7357 DebugLoc DL = Op.getDebugLoc();
7358 SDValue Result = DAG.getTargetGlobalAddress(GA->getGlobal(), DL,
7359 GA->getValueType(0),
7360 GA->getOffset(), OpFlag);
7361 SDValue Offset = DAG.getNode(WrapperKind, DL, getPointerTy(), Result);
7363 // With PIC32, the address is actually $g + Offset.
7365 Offset = DAG.getNode(ISD::ADD, DL, getPointerTy(),
7366 DAG.getNode(X86ISD::GlobalBaseReg,
7367 DebugLoc(), getPointerTy()),
7370 // Lowering the machine isd will make sure everything is in the right
7372 SDValue Chain = DAG.getEntryNode();
7373 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
7374 SDValue Args[] = { Chain, Offset };
7375 Chain = DAG.getNode(X86ISD::TLSCALL, DL, NodeTys, Args, 2);
7377 // TLSCALL will be codegen'ed as call. Inform MFI that function has calls.
7378 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
7379 MFI->setAdjustsStack(true);
7381 // And our return value (tls address) is in the standard call return value
7383 unsigned Reg = Subtarget->is64Bit() ? X86::RAX : X86::EAX;
7384 return DAG.getCopyFromReg(Chain, DL, Reg, getPointerTy(),
7386 } else if (Subtarget->isTargetWindows()) {
7387 // Just use the implicit TLS architecture
7388 // Need to generate someting similar to:
7389 // mov rdx, qword [gs:abs 58H]; Load pointer to ThreadLocalStorage
7391 // mov ecx, dword [rel _tls_index]: Load index (from C runtime)
7392 // mov rcx, qword [rdx+rcx*8]
7393 // mov eax, .tls$:tlsvar
7394 // [rax+rcx] contains the address
7395 // Windows 64bit: gs:0x58
7396 // Windows 32bit: fs:__tls_array
7398 // If GV is an alias then use the aliasee for determining
7399 // thread-localness.
7400 if (const GlobalAlias *GA = dyn_cast<GlobalAlias>(GV))
7401 GV = GA->resolveAliasedGlobal(false);
7402 DebugLoc dl = GA->getDebugLoc();
7403 SDValue Chain = DAG.getEntryNode();
7405 // Get the Thread Pointer, which is %fs:__tls_array (32-bit) or
7406 // %gs:0x58 (64-bit).
7407 Value *Ptr = Constant::getNullValue(Subtarget->is64Bit()
7408 ? Type::getInt8PtrTy(*DAG.getContext(),
7410 : Type::getInt32PtrTy(*DAG.getContext(),
7413 SDValue ThreadPointer = DAG.getLoad(getPointerTy(), dl, Chain,
7414 Subtarget->is64Bit()
7415 ? DAG.getIntPtrConstant(0x58)
7416 : DAG.getExternalSymbol("_tls_array",
7418 MachinePointerInfo(Ptr),
7419 false, false, false, 0);
7421 // Load the _tls_index variable
7422 SDValue IDX = DAG.getExternalSymbol("_tls_index", getPointerTy());
7423 if (Subtarget->is64Bit())
7424 IDX = DAG.getExtLoad(ISD::ZEXTLOAD, dl, getPointerTy(), Chain,
7425 IDX, MachinePointerInfo(), MVT::i32,
7428 IDX = DAG.getLoad(getPointerTy(), dl, Chain, IDX, MachinePointerInfo(),
7429 false, false, false, 0);
7431 SDValue Scale = DAG.getConstant(Log2_64_Ceil(TD->getPointerSize()),
7433 IDX = DAG.getNode(ISD::SHL, dl, getPointerTy(), IDX, Scale);
7435 SDValue res = DAG.getNode(ISD::ADD, dl, getPointerTy(), ThreadPointer, IDX);
7436 res = DAG.getLoad(getPointerTy(), dl, Chain, res, MachinePointerInfo(),
7437 false, false, false, 0);
7439 // Get the offset of start of .tls section
7440 SDValue TGA = DAG.getTargetGlobalAddress(GA->getGlobal(), dl,
7441 GA->getValueType(0),
7442 GA->getOffset(), X86II::MO_SECREL);
7443 SDValue Offset = DAG.getNode(X86ISD::Wrapper, dl, getPointerTy(), TGA);
7445 // The address of the thread local variable is the add of the thread
7446 // pointer with the offset of the variable.
7447 return DAG.getNode(ISD::ADD, dl, getPointerTy(), res, Offset);
7450 llvm_unreachable("TLS not implemented for this target.");
7454 /// LowerShiftParts - Lower SRA_PARTS and friends, which return two i32 values
7455 /// and take a 2 x i32 value to shift plus a shift amount.
7456 SDValue X86TargetLowering::LowerShiftParts(SDValue Op, SelectionDAG &DAG) const{
7457 assert(Op.getNumOperands() == 3 && "Not a double-shift!");
7458 EVT VT = Op.getValueType();
7459 unsigned VTBits = VT.getSizeInBits();
7460 DebugLoc dl = Op.getDebugLoc();
7461 bool isSRA = Op.getOpcode() == ISD::SRA_PARTS;
7462 SDValue ShOpLo = Op.getOperand(0);
7463 SDValue ShOpHi = Op.getOperand(1);
7464 SDValue ShAmt = Op.getOperand(2);
7465 SDValue Tmp1 = isSRA ? DAG.getNode(ISD::SRA, dl, VT, ShOpHi,
7466 DAG.getConstant(VTBits - 1, MVT::i8))
7467 : DAG.getConstant(0, VT);
7470 if (Op.getOpcode() == ISD::SHL_PARTS) {
7471 Tmp2 = DAG.getNode(X86ISD::SHLD, dl, VT, ShOpHi, ShOpLo, ShAmt);
7472 Tmp3 = DAG.getNode(ISD::SHL, dl, VT, ShOpLo, ShAmt);
7474 Tmp2 = DAG.getNode(X86ISD::SHRD, dl, VT, ShOpLo, ShOpHi, ShAmt);
7475 Tmp3 = DAG.getNode(isSRA ? ISD::SRA : ISD::SRL, dl, VT, ShOpHi, ShAmt);
7478 SDValue AndNode = DAG.getNode(ISD::AND, dl, MVT::i8, ShAmt,
7479 DAG.getConstant(VTBits, MVT::i8));
7480 SDValue Cond = DAG.getNode(X86ISD::CMP, dl, MVT::i32,
7481 AndNode, DAG.getConstant(0, MVT::i8));
7484 SDValue CC = DAG.getConstant(X86::COND_NE, MVT::i8);
7485 SDValue Ops0[4] = { Tmp2, Tmp3, CC, Cond };
7486 SDValue Ops1[4] = { Tmp3, Tmp1, CC, Cond };
7488 if (Op.getOpcode() == ISD::SHL_PARTS) {
7489 Hi = DAG.getNode(X86ISD::CMOV, dl, VT, Ops0, 4);
7490 Lo = DAG.getNode(X86ISD::CMOV, dl, VT, Ops1, 4);
7492 Lo = DAG.getNode(X86ISD::CMOV, dl, VT, Ops0, 4);
7493 Hi = DAG.getNode(X86ISD::CMOV, dl, VT, Ops1, 4);
7496 SDValue Ops[2] = { Lo, Hi };
7497 return DAG.getMergeValues(Ops, 2, dl);
7500 SDValue X86TargetLowering::LowerSINT_TO_FP(SDValue Op,
7501 SelectionDAG &DAG) const {
7502 EVT SrcVT = Op.getOperand(0).getValueType();
7504 if (SrcVT.isVector())
7507 assert(SrcVT.getSimpleVT() <= MVT::i64 && SrcVT.getSimpleVT() >= MVT::i16 &&
7508 "Unknown SINT_TO_FP to lower!");
7510 // These are really Legal; return the operand so the caller accepts it as
7512 if (SrcVT == MVT::i32 && isScalarFPTypeInSSEReg(Op.getValueType()))
7514 if (SrcVT == MVT::i64 && isScalarFPTypeInSSEReg(Op.getValueType()) &&
7515 Subtarget->is64Bit()) {
7519 DebugLoc dl = Op.getDebugLoc();
7520 unsigned Size = SrcVT.getSizeInBits()/8;
7521 MachineFunction &MF = DAG.getMachineFunction();
7522 int SSFI = MF.getFrameInfo()->CreateStackObject(Size, Size, false);
7523 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
7524 SDValue Chain = DAG.getStore(DAG.getEntryNode(), dl, Op.getOperand(0),
7526 MachinePointerInfo::getFixedStack(SSFI),
7528 return BuildFILD(Op, SrcVT, Chain, StackSlot, DAG);
7531 SDValue X86TargetLowering::BuildFILD(SDValue Op, EVT SrcVT, SDValue Chain,
7533 SelectionDAG &DAG) const {
7535 DebugLoc DL = Op.getDebugLoc();
7537 bool useSSE = isScalarFPTypeInSSEReg(Op.getValueType());
7539 Tys = DAG.getVTList(MVT::f64, MVT::Other, MVT::Glue);
7541 Tys = DAG.getVTList(Op.getValueType(), MVT::Other);
7543 unsigned ByteSize = SrcVT.getSizeInBits()/8;
7545 FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(StackSlot);
7546 MachineMemOperand *MMO;
7548 int SSFI = FI->getIndex();
7550 DAG.getMachineFunction()
7551 .getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
7552 MachineMemOperand::MOLoad, ByteSize, ByteSize);
7554 MMO = cast<LoadSDNode>(StackSlot)->getMemOperand();
7555 StackSlot = StackSlot.getOperand(1);
7557 SDValue Ops[] = { Chain, StackSlot, DAG.getValueType(SrcVT) };
7558 SDValue Result = DAG.getMemIntrinsicNode(useSSE ? X86ISD::FILD_FLAG :
7560 Tys, Ops, array_lengthof(Ops),
7564 Chain = Result.getValue(1);
7565 SDValue InFlag = Result.getValue(2);
7567 // FIXME: Currently the FST is flagged to the FILD_FLAG. This
7568 // shouldn't be necessary except that RFP cannot be live across
7569 // multiple blocks. When stackifier is fixed, they can be uncoupled.
7570 MachineFunction &MF = DAG.getMachineFunction();
7571 unsigned SSFISize = Op.getValueType().getSizeInBits()/8;
7572 int SSFI = MF.getFrameInfo()->CreateStackObject(SSFISize, SSFISize, false);
7573 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
7574 Tys = DAG.getVTList(MVT::Other);
7576 Chain, Result, StackSlot, DAG.getValueType(Op.getValueType()), InFlag
7578 MachineMemOperand *MMO =
7579 DAG.getMachineFunction()
7580 .getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
7581 MachineMemOperand::MOStore, SSFISize, SSFISize);
7583 Chain = DAG.getMemIntrinsicNode(X86ISD::FST, DL, Tys,
7584 Ops, array_lengthof(Ops),
7585 Op.getValueType(), MMO);
7586 Result = DAG.getLoad(Op.getValueType(), DL, Chain, StackSlot,
7587 MachinePointerInfo::getFixedStack(SSFI),
7588 false, false, false, 0);
7594 // LowerUINT_TO_FP_i64 - 64-bit unsigned integer to double expansion.
7595 SDValue X86TargetLowering::LowerUINT_TO_FP_i64(SDValue Op,
7596 SelectionDAG &DAG) const {
7597 // This algorithm is not obvious. Here it is what we're trying to output:
7600 punpckldq (c0), %xmm0 // c0: (uint4){ 0x43300000U, 0x45300000U, 0U, 0U }
7601 subpd (c1), %xmm0 // c1: (double2){ 0x1.0p52, 0x1.0p52 * 0x1.0p32 }
7605 pshufd $0x4e, %xmm0, %xmm1
7610 DebugLoc dl = Op.getDebugLoc();
7611 LLVMContext *Context = DAG.getContext();
7613 // Build some magic constants.
7614 const uint32_t CV0[] = { 0x43300000, 0x45300000, 0, 0 };
7615 Constant *C0 = ConstantDataVector::get(*Context, CV0);
7616 SDValue CPIdx0 = DAG.getConstantPool(C0, getPointerTy(), 16);
7618 SmallVector<Constant*,2> CV1;
7620 ConstantFP::get(*Context, APFloat(APInt(64, 0x4330000000000000ULL))));
7622 ConstantFP::get(*Context, APFloat(APInt(64, 0x4530000000000000ULL))));
7623 Constant *C1 = ConstantVector::get(CV1);
7624 SDValue CPIdx1 = DAG.getConstantPool(C1, getPointerTy(), 16);
7626 // Load the 64-bit value into an XMM register.
7627 SDValue XR1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2i64,
7629 SDValue CLod0 = DAG.getLoad(MVT::v4i32, dl, DAG.getEntryNode(), CPIdx0,
7630 MachinePointerInfo::getConstantPool(),
7631 false, false, false, 16);
7632 SDValue Unpck1 = getUnpackl(DAG, dl, MVT::v4i32,
7633 DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, XR1),
7636 SDValue CLod1 = DAG.getLoad(MVT::v2f64, dl, CLod0.getValue(1), CPIdx1,
7637 MachinePointerInfo::getConstantPool(),
7638 false, false, false, 16);
7639 SDValue XR2F = DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, Unpck1);
7640 SDValue Sub = DAG.getNode(ISD::FSUB, dl, MVT::v2f64, XR2F, CLod1);
7643 if (Subtarget->hasSSE3()) {
7644 // FIXME: The 'haddpd' instruction may be slower than 'movhlps + addsd'.
7645 Result = DAG.getNode(X86ISD::FHADD, dl, MVT::v2f64, Sub, Sub);
7647 SDValue S2F = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, Sub);
7648 SDValue Shuffle = getTargetShuffleNode(X86ISD::PSHUFD, dl, MVT::v4i32,
7650 Result = DAG.getNode(ISD::FADD, dl, MVT::v2f64,
7651 DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, Shuffle),
7655 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Result,
7656 DAG.getIntPtrConstant(0));
7659 // LowerUINT_TO_FP_i32 - 32-bit unsigned integer to float expansion.
7660 SDValue X86TargetLowering::LowerUINT_TO_FP_i32(SDValue Op,
7661 SelectionDAG &DAG) const {
7662 DebugLoc dl = Op.getDebugLoc();
7663 // FP constant to bias correct the final result.
7664 SDValue Bias = DAG.getConstantFP(BitsToDouble(0x4330000000000000ULL),
7667 // Load the 32-bit value into an XMM register.
7668 SDValue Load = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32,
7671 // Zero out the upper parts of the register.
7672 Load = getShuffleVectorZeroOrUndef(Load, 0, true, Subtarget, DAG);
7674 Load = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64,
7675 DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, Load),
7676 DAG.getIntPtrConstant(0));
7678 // Or the load with the bias.
7679 SDValue Or = DAG.getNode(ISD::OR, dl, MVT::v2i64,
7680 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64,
7681 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
7683 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64,
7684 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
7685 MVT::v2f64, Bias)));
7686 Or = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64,
7687 DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, Or),
7688 DAG.getIntPtrConstant(0));
7690 // Subtract the bias.
7691 SDValue Sub = DAG.getNode(ISD::FSUB, dl, MVT::f64, Or, Bias);
7693 // Handle final rounding.
7694 EVT DestVT = Op.getValueType();
7696 if (DestVT.bitsLT(MVT::f64)) {
7697 return DAG.getNode(ISD::FP_ROUND, dl, DestVT, Sub,
7698 DAG.getIntPtrConstant(0));
7699 } else if (DestVT.bitsGT(MVT::f64)) {
7700 return DAG.getNode(ISD::FP_EXTEND, dl, DestVT, Sub);
7703 // Handle final rounding.
7707 SDValue X86TargetLowering::LowerUINT_TO_FP(SDValue Op,
7708 SelectionDAG &DAG) const {
7709 SDValue N0 = Op.getOperand(0);
7710 DebugLoc dl = Op.getDebugLoc();
7712 // Since UINT_TO_FP is legal (it's marked custom), dag combiner won't
7713 // optimize it to a SINT_TO_FP when the sign bit is known zero. Perform
7714 // the optimization here.
7715 if (DAG.SignBitIsZero(N0))
7716 return DAG.getNode(ISD::SINT_TO_FP, dl, Op.getValueType(), N0);
7718 EVT SrcVT = N0.getValueType();
7719 EVT DstVT = Op.getValueType();
7720 if (SrcVT == MVT::i64 && DstVT == MVT::f64 && X86ScalarSSEf64)
7721 return LowerUINT_TO_FP_i64(Op, DAG);
7722 else if (SrcVT == MVT::i32 && X86ScalarSSEf64)
7723 return LowerUINT_TO_FP_i32(Op, DAG);
7724 else if (Subtarget->is64Bit() &&
7725 SrcVT == MVT::i64 && DstVT == MVT::f32)
7728 // Make a 64-bit buffer, and use it to build an FILD.
7729 SDValue StackSlot = DAG.CreateStackTemporary(MVT::i64);
7730 if (SrcVT == MVT::i32) {
7731 SDValue WordOff = DAG.getConstant(4, getPointerTy());
7732 SDValue OffsetSlot = DAG.getNode(ISD::ADD, dl,
7733 getPointerTy(), StackSlot, WordOff);
7734 SDValue Store1 = DAG.getStore(DAG.getEntryNode(), dl, Op.getOperand(0),
7735 StackSlot, MachinePointerInfo(),
7737 SDValue Store2 = DAG.getStore(Store1, dl, DAG.getConstant(0, MVT::i32),
7738 OffsetSlot, MachinePointerInfo(),
7740 SDValue Fild = BuildFILD(Op, MVT::i64, Store2, StackSlot, DAG);
7744 assert(SrcVT == MVT::i64 && "Unexpected type in UINT_TO_FP");
7745 SDValue Store = DAG.getStore(DAG.getEntryNode(), dl, Op.getOperand(0),
7746 StackSlot, MachinePointerInfo(),
7748 // For i64 source, we need to add the appropriate power of 2 if the input
7749 // was negative. This is the same as the optimization in
7750 // DAGTypeLegalizer::ExpandIntOp_UNIT_TO_FP, and for it to be safe here,
7751 // we must be careful to do the computation in x87 extended precision, not
7752 // in SSE. (The generic code can't know it's OK to do this, or how to.)
7753 int SSFI = cast<FrameIndexSDNode>(StackSlot)->getIndex();
7754 MachineMemOperand *MMO =
7755 DAG.getMachineFunction()
7756 .getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
7757 MachineMemOperand::MOLoad, 8, 8);
7759 SDVTList Tys = DAG.getVTList(MVT::f80, MVT::Other);
7760 SDValue Ops[] = { Store, StackSlot, DAG.getValueType(MVT::i64) };
7761 SDValue Fild = DAG.getMemIntrinsicNode(X86ISD::FILD, dl, Tys, Ops, 3,
7764 APInt FF(32, 0x5F800000ULL);
7766 // Check whether the sign bit is set.
7767 SDValue SignSet = DAG.getSetCC(dl, getSetCCResultType(MVT::i64),
7768 Op.getOperand(0), DAG.getConstant(0, MVT::i64),
7771 // Build a 64 bit pair (0, FF) in the constant pool, with FF in the lo bits.
7772 SDValue FudgePtr = DAG.getConstantPool(
7773 ConstantInt::get(*DAG.getContext(), FF.zext(64)),
7776 // Get a pointer to FF if the sign bit was set, or to 0 otherwise.
7777 SDValue Zero = DAG.getIntPtrConstant(0);
7778 SDValue Four = DAG.getIntPtrConstant(4);
7779 SDValue Offset = DAG.getNode(ISD::SELECT, dl, Zero.getValueType(), SignSet,
7781 FudgePtr = DAG.getNode(ISD::ADD, dl, getPointerTy(), FudgePtr, Offset);
7783 // Load the value out, extending it from f32 to f80.
7784 // FIXME: Avoid the extend by constructing the right constant pool?
7785 SDValue Fudge = DAG.getExtLoad(ISD::EXTLOAD, dl, MVT::f80, DAG.getEntryNode(),
7786 FudgePtr, MachinePointerInfo::getConstantPool(),
7787 MVT::f32, false, false, 4);
7788 // Extend everything to 80 bits to force it to be done on x87.
7789 SDValue Add = DAG.getNode(ISD::FADD, dl, MVT::f80, Fild, Fudge);
7790 return DAG.getNode(ISD::FP_ROUND, dl, DstVT, Add, DAG.getIntPtrConstant(0));
7793 std::pair<SDValue,SDValue> X86TargetLowering::
7794 FP_TO_INTHelper(SDValue Op, SelectionDAG &DAG, bool IsSigned, bool IsReplace) const {
7795 DebugLoc DL = Op.getDebugLoc();
7797 EVT DstTy = Op.getValueType();
7799 if (!IsSigned && !isIntegerTypeFTOL(DstTy)) {
7800 assert(DstTy == MVT::i32 && "Unexpected FP_TO_UINT");
7804 assert(DstTy.getSimpleVT() <= MVT::i64 &&
7805 DstTy.getSimpleVT() >= MVT::i16 &&
7806 "Unknown FP_TO_INT to lower!");
7808 // These are really Legal.
7809 if (DstTy == MVT::i32 &&
7810 isScalarFPTypeInSSEReg(Op.getOperand(0).getValueType()))
7811 return std::make_pair(SDValue(), SDValue());
7812 if (Subtarget->is64Bit() &&
7813 DstTy == MVT::i64 &&
7814 isScalarFPTypeInSSEReg(Op.getOperand(0).getValueType()))
7815 return std::make_pair(SDValue(), SDValue());
7817 // We lower FP->int64 either into FISTP64 followed by a load from a temporary
7818 // stack slot, or into the FTOL runtime function.
7819 MachineFunction &MF = DAG.getMachineFunction();
7820 unsigned MemSize = DstTy.getSizeInBits()/8;
7821 int SSFI = MF.getFrameInfo()->CreateStackObject(MemSize, MemSize, false);
7822 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
7825 if (!IsSigned && isIntegerTypeFTOL(DstTy))
7826 Opc = X86ISD::WIN_FTOL;
7828 switch (DstTy.getSimpleVT().SimpleTy) {
7829 default: llvm_unreachable("Invalid FP_TO_SINT to lower!");
7830 case MVT::i16: Opc = X86ISD::FP_TO_INT16_IN_MEM; break;
7831 case MVT::i32: Opc = X86ISD::FP_TO_INT32_IN_MEM; break;
7832 case MVT::i64: Opc = X86ISD::FP_TO_INT64_IN_MEM; break;
7835 SDValue Chain = DAG.getEntryNode();
7836 SDValue Value = Op.getOperand(0);
7837 EVT TheVT = Op.getOperand(0).getValueType();
7838 // FIXME This causes a redundant load/store if the SSE-class value is already
7839 // in memory, such as if it is on the callstack.
7840 if (isScalarFPTypeInSSEReg(TheVT)) {
7841 assert(DstTy == MVT::i64 && "Invalid FP_TO_SINT to lower!");
7842 Chain = DAG.getStore(Chain, DL, Value, StackSlot,
7843 MachinePointerInfo::getFixedStack(SSFI),
7845 SDVTList Tys = DAG.getVTList(Op.getOperand(0).getValueType(), MVT::Other);
7847 Chain, StackSlot, DAG.getValueType(TheVT)
7850 MachineMemOperand *MMO =
7851 MF.getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
7852 MachineMemOperand::MOLoad, MemSize, MemSize);
7853 Value = DAG.getMemIntrinsicNode(X86ISD::FLD, DL, Tys, Ops, 3,
7855 Chain = Value.getValue(1);
7856 SSFI = MF.getFrameInfo()->CreateStackObject(MemSize, MemSize, false);
7857 StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
7860 MachineMemOperand *MMO =
7861 MF.getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
7862 MachineMemOperand::MOStore, MemSize, MemSize);
7864 if (Opc != X86ISD::WIN_FTOL) {
7865 // Build the FP_TO_INT*_IN_MEM
7866 SDValue Ops[] = { Chain, Value, StackSlot };
7867 SDValue FIST = DAG.getMemIntrinsicNode(Opc, DL, DAG.getVTList(MVT::Other),
7868 Ops, 3, DstTy, MMO);
7869 return std::make_pair(FIST, StackSlot);
7871 SDValue ftol = DAG.getNode(X86ISD::WIN_FTOL, DL,
7872 DAG.getVTList(MVT::Other, MVT::Glue),
7874 SDValue eax = DAG.getCopyFromReg(ftol, DL, X86::EAX,
7875 MVT::i32, ftol.getValue(1));
7876 SDValue edx = DAG.getCopyFromReg(eax.getValue(1), DL, X86::EDX,
7877 MVT::i32, eax.getValue(2));
7878 SDValue Ops[] = { eax, edx };
7879 SDValue pair = IsReplace
7880 ? DAG.getNode(ISD::BUILD_PAIR, DL, MVT::i64, Ops, 2)
7881 : DAG.getMergeValues(Ops, 2, DL);
7882 return std::make_pair(pair, SDValue());
7886 SDValue X86TargetLowering::LowerFP_TO_SINT(SDValue Op,
7887 SelectionDAG &DAG) const {
7888 if (Op.getValueType().isVector())
7891 std::pair<SDValue,SDValue> Vals = FP_TO_INTHelper(Op, DAG,
7892 /*IsSigned=*/ true, /*IsReplace=*/ false);
7893 SDValue FIST = Vals.first, StackSlot = Vals.second;
7894 // If FP_TO_INTHelper failed, the node is actually supposed to be Legal.
7895 if (FIST.getNode() == 0) return Op;
7897 if (StackSlot.getNode())
7899 return DAG.getLoad(Op.getValueType(), Op.getDebugLoc(),
7900 FIST, StackSlot, MachinePointerInfo(),
7901 false, false, false, 0);
7903 // The node is the result.
7907 SDValue X86TargetLowering::LowerFP_TO_UINT(SDValue Op,
7908 SelectionDAG &DAG) const {
7909 std::pair<SDValue,SDValue> Vals = FP_TO_INTHelper(Op, DAG,
7910 /*IsSigned=*/ false, /*IsReplace=*/ false);
7911 SDValue FIST = Vals.first, StackSlot = Vals.second;
7912 assert(FIST.getNode() && "Unexpected failure");
7914 if (StackSlot.getNode())
7916 return DAG.getLoad(Op.getValueType(), Op.getDebugLoc(),
7917 FIST, StackSlot, MachinePointerInfo(),
7918 false, false, false, 0);
7920 // The node is the result.
7924 SDValue X86TargetLowering::LowerFABS(SDValue Op,
7925 SelectionDAG &DAG) const {
7926 LLVMContext *Context = DAG.getContext();
7927 DebugLoc dl = Op.getDebugLoc();
7928 EVT VT = Op.getValueType();
7931 EltVT = VT.getVectorElementType();
7933 if (EltVT == MVT::f64) {
7934 C = ConstantVector::getSplat(2,
7935 ConstantFP::get(*Context, APFloat(APInt(64, ~(1ULL << 63)))));
7937 C = ConstantVector::getSplat(4,
7938 ConstantFP::get(*Context, APFloat(APInt(32, ~(1U << 31)))));
7940 SDValue CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
7941 SDValue Mask = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
7942 MachinePointerInfo::getConstantPool(),
7943 false, false, false, 16);
7944 return DAG.getNode(X86ISD::FAND, dl, VT, Op.getOperand(0), Mask);
7947 SDValue X86TargetLowering::LowerFNEG(SDValue Op, SelectionDAG &DAG) const {
7948 LLVMContext *Context = DAG.getContext();
7949 DebugLoc dl = Op.getDebugLoc();
7950 EVT VT = Op.getValueType();
7952 unsigned NumElts = VT == MVT::f64 ? 2 : 4;
7953 if (VT.isVector()) {
7954 EltVT = VT.getVectorElementType();
7955 NumElts = VT.getVectorNumElements();
7958 if (EltVT == MVT::f64)
7959 C = ConstantFP::get(*Context, APFloat(APInt(64, 1ULL << 63)));
7961 C = ConstantFP::get(*Context, APFloat(APInt(32, 1U << 31)));
7962 C = ConstantVector::getSplat(NumElts, C);
7963 SDValue CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
7964 SDValue Mask = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
7965 MachinePointerInfo::getConstantPool(),
7966 false, false, false, 16);
7967 if (VT.isVector()) {
7968 MVT XORVT = VT.getSizeInBits() == 128 ? MVT::v2i64 : MVT::v4i64;
7969 return DAG.getNode(ISD::BITCAST, dl, VT,
7970 DAG.getNode(ISD::XOR, dl, XORVT,
7971 DAG.getNode(ISD::BITCAST, dl, XORVT,
7973 DAG.getNode(ISD::BITCAST, dl, XORVT, Mask)));
7975 return DAG.getNode(X86ISD::FXOR, dl, VT, Op.getOperand(0), Mask);
7979 SDValue X86TargetLowering::LowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) const {
7980 LLVMContext *Context = DAG.getContext();
7981 SDValue Op0 = Op.getOperand(0);
7982 SDValue Op1 = Op.getOperand(1);
7983 DebugLoc dl = Op.getDebugLoc();
7984 EVT VT = Op.getValueType();
7985 EVT SrcVT = Op1.getValueType();
7987 // If second operand is smaller, extend it first.
7988 if (SrcVT.bitsLT(VT)) {
7989 Op1 = DAG.getNode(ISD::FP_EXTEND, dl, VT, Op1);
7992 // And if it is bigger, shrink it first.
7993 if (SrcVT.bitsGT(VT)) {
7994 Op1 = DAG.getNode(ISD::FP_ROUND, dl, VT, Op1, DAG.getIntPtrConstant(1));
7998 // At this point the operands and the result should have the same
7999 // type, and that won't be f80 since that is not custom lowered.
8001 // First get the sign bit of second operand.
8002 SmallVector<Constant*,4> CV;
8003 if (SrcVT == MVT::f64) {
8004 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(64, 1ULL << 63))));
8005 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(64, 0))));
8007 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 1U << 31))));
8008 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 0))));
8009 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 0))));
8010 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 0))));
8012 Constant *C = ConstantVector::get(CV);
8013 SDValue CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
8014 SDValue Mask1 = DAG.getLoad(SrcVT, dl, DAG.getEntryNode(), CPIdx,
8015 MachinePointerInfo::getConstantPool(),
8016 false, false, false, 16);
8017 SDValue SignBit = DAG.getNode(X86ISD::FAND, dl, SrcVT, Op1, Mask1);
8019 // Shift sign bit right or left if the two operands have different types.
8020 if (SrcVT.bitsGT(VT)) {
8021 // Op0 is MVT::f32, Op1 is MVT::f64.
8022 SignBit = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2f64, SignBit);
8023 SignBit = DAG.getNode(X86ISD::FSRL, dl, MVT::v2f64, SignBit,
8024 DAG.getConstant(32, MVT::i32));
8025 SignBit = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, SignBit);
8026 SignBit = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f32, SignBit,
8027 DAG.getIntPtrConstant(0));
8030 // Clear first operand sign bit.
8032 if (VT == MVT::f64) {
8033 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(64, ~(1ULL << 63)))));
8034 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(64, 0))));
8036 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, ~(1U << 31)))));
8037 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 0))));
8038 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 0))));
8039 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 0))));
8041 C = ConstantVector::get(CV);
8042 CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
8043 SDValue Mask2 = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
8044 MachinePointerInfo::getConstantPool(),
8045 false, false, false, 16);
8046 SDValue Val = DAG.getNode(X86ISD::FAND, dl, VT, Op0, Mask2);
8048 // Or the value with the sign bit.
8049 return DAG.getNode(X86ISD::FOR, dl, VT, Val, SignBit);
8052 SDValue X86TargetLowering::LowerFGETSIGN(SDValue Op, SelectionDAG &DAG) const {
8053 SDValue N0 = Op.getOperand(0);
8054 DebugLoc dl = Op.getDebugLoc();
8055 EVT VT = Op.getValueType();
8057 // Lower ISD::FGETSIGN to (AND (X86ISD::FGETSIGNx86 ...) 1).
8058 SDValue xFGETSIGN = DAG.getNode(X86ISD::FGETSIGNx86, dl, VT, N0,
8059 DAG.getConstant(1, VT));
8060 return DAG.getNode(ISD::AND, dl, VT, xFGETSIGN, DAG.getConstant(1, VT));
8063 /// Emit nodes that will be selected as "test Op0,Op0", or something
8065 SDValue X86TargetLowering::EmitTest(SDValue Op, unsigned X86CC,
8066 SelectionDAG &DAG) const {
8067 DebugLoc dl = Op.getDebugLoc();
8069 // CF and OF aren't always set the way we want. Determine which
8070 // of these we need.
8071 bool NeedCF = false;
8072 bool NeedOF = false;
8075 case X86::COND_A: case X86::COND_AE:
8076 case X86::COND_B: case X86::COND_BE:
8079 case X86::COND_G: case X86::COND_GE:
8080 case X86::COND_L: case X86::COND_LE:
8081 case X86::COND_O: case X86::COND_NO:
8086 // See if we can use the EFLAGS value from the operand instead of
8087 // doing a separate TEST. TEST always sets OF and CF to 0, so unless
8088 // we prove that the arithmetic won't overflow, we can't use OF or CF.
8089 if (Op.getResNo() != 0 || NeedOF || NeedCF)
8090 // Emit a CMP with 0, which is the TEST pattern.
8091 return DAG.getNode(X86ISD::CMP, dl, MVT::i32, Op,
8092 DAG.getConstant(0, Op.getValueType()));
8094 unsigned Opcode = 0;
8095 unsigned NumOperands = 0;
8096 switch (Op.getNode()->getOpcode()) {
8098 // Due to an isel shortcoming, be conservative if this add is likely to be
8099 // selected as part of a load-modify-store instruction. When the root node
8100 // in a match is a store, isel doesn't know how to remap non-chain non-flag
8101 // uses of other nodes in the match, such as the ADD in this case. This
8102 // leads to the ADD being left around and reselected, with the result being
8103 // two adds in the output. Alas, even if none our users are stores, that
8104 // doesn't prove we're O.K. Ergo, if we have any parents that aren't
8105 // CopyToReg or SETCC, eschew INC/DEC. A better fix seems to require
8106 // climbing the DAG back to the root, and it doesn't seem to be worth the
8108 for (SDNode::use_iterator UI = Op.getNode()->use_begin(),
8109 UE = Op.getNode()->use_end(); UI != UE; ++UI)
8110 if (UI->getOpcode() != ISD::CopyToReg &&
8111 UI->getOpcode() != ISD::SETCC &&
8112 UI->getOpcode() != ISD::STORE)
8115 if (ConstantSDNode *C =
8116 dyn_cast<ConstantSDNode>(Op.getNode()->getOperand(1))) {
8117 // An add of one will be selected as an INC.
8118 if (C->getAPIntValue() == 1) {
8119 Opcode = X86ISD::INC;
8124 // An add of negative one (subtract of one) will be selected as a DEC.
8125 if (C->getAPIntValue().isAllOnesValue()) {
8126 Opcode = X86ISD::DEC;
8132 // Otherwise use a regular EFLAGS-setting add.
8133 Opcode = X86ISD::ADD;
8137 // If the primary and result isn't used, don't bother using X86ISD::AND,
8138 // because a TEST instruction will be better.
8139 bool NonFlagUse = false;
8140 for (SDNode::use_iterator UI = Op.getNode()->use_begin(),
8141 UE = Op.getNode()->use_end(); UI != UE; ++UI) {
8143 unsigned UOpNo = UI.getOperandNo();
8144 if (User->getOpcode() == ISD::TRUNCATE && User->hasOneUse()) {
8145 // Look pass truncate.
8146 UOpNo = User->use_begin().getOperandNo();
8147 User = *User->use_begin();
8150 if (User->getOpcode() != ISD::BRCOND &&
8151 User->getOpcode() != ISD::SETCC &&
8152 (User->getOpcode() != ISD::SELECT || UOpNo != 0)) {
8165 // Due to the ISEL shortcoming noted above, be conservative if this op is
8166 // likely to be selected as part of a load-modify-store instruction.
8167 for (SDNode::use_iterator UI = Op.getNode()->use_begin(),
8168 UE = Op.getNode()->use_end(); UI != UE; ++UI)
8169 if (UI->getOpcode() == ISD::STORE)
8172 // Otherwise use a regular EFLAGS-setting instruction.
8173 switch (Op.getNode()->getOpcode()) {
8174 default: llvm_unreachable("unexpected operator!");
8175 case ISD::SUB: Opcode = X86ISD::SUB; break;
8176 case ISD::OR: Opcode = X86ISD::OR; break;
8177 case ISD::XOR: Opcode = X86ISD::XOR; break;
8178 case ISD::AND: Opcode = X86ISD::AND; break;
8190 return SDValue(Op.getNode(), 1);
8197 // Emit a CMP with 0, which is the TEST pattern.
8198 return DAG.getNode(X86ISD::CMP, dl, MVT::i32, Op,
8199 DAG.getConstant(0, Op.getValueType()));
8201 SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::i32);
8202 SmallVector<SDValue, 4> Ops;
8203 for (unsigned i = 0; i != NumOperands; ++i)
8204 Ops.push_back(Op.getOperand(i));
8206 SDValue New = DAG.getNode(Opcode, dl, VTs, &Ops[0], NumOperands);
8207 DAG.ReplaceAllUsesWith(Op, New);
8208 return SDValue(New.getNode(), 1);
8211 /// Emit nodes that will be selected as "cmp Op0,Op1", or something
8213 SDValue X86TargetLowering::EmitCmp(SDValue Op0, SDValue Op1, unsigned X86CC,
8214 SelectionDAG &DAG) const {
8215 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op1))
8216 if (C->getAPIntValue() == 0)
8217 return EmitTest(Op0, X86CC, DAG);
8219 DebugLoc dl = Op0.getDebugLoc();
8220 return DAG.getNode(X86ISD::CMP, dl, MVT::i32, Op0, Op1);
8223 /// LowerToBT - Result of 'and' is compared against zero. Turn it into a BT node
8224 /// if it's possible.
8225 SDValue X86TargetLowering::LowerToBT(SDValue And, ISD::CondCode CC,
8226 DebugLoc dl, SelectionDAG &DAG) const {
8227 SDValue Op0 = And.getOperand(0);
8228 SDValue Op1 = And.getOperand(1);
8229 if (Op0.getOpcode() == ISD::TRUNCATE)
8230 Op0 = Op0.getOperand(0);
8231 if (Op1.getOpcode() == ISD::TRUNCATE)
8232 Op1 = Op1.getOperand(0);
8235 if (Op1.getOpcode() == ISD::SHL)
8236 std::swap(Op0, Op1);
8237 if (Op0.getOpcode() == ISD::SHL) {
8238 if (ConstantSDNode *And00C = dyn_cast<ConstantSDNode>(Op0.getOperand(0)))
8239 if (And00C->getZExtValue() == 1) {
8240 // If we looked past a truncate, check that it's only truncating away
8242 unsigned BitWidth = Op0.getValueSizeInBits();
8243 unsigned AndBitWidth = And.getValueSizeInBits();
8244 if (BitWidth > AndBitWidth) {
8246 DAG.ComputeMaskedBits(Op0, Zeros, Ones);
8247 if (Zeros.countLeadingOnes() < BitWidth - AndBitWidth)
8251 RHS = Op0.getOperand(1);
8253 } else if (Op1.getOpcode() == ISD::Constant) {
8254 ConstantSDNode *AndRHS = cast<ConstantSDNode>(Op1);
8255 uint64_t AndRHSVal = AndRHS->getZExtValue();
8256 SDValue AndLHS = Op0;
8258 if (AndRHSVal == 1 && AndLHS.getOpcode() == ISD::SRL) {
8259 LHS = AndLHS.getOperand(0);
8260 RHS = AndLHS.getOperand(1);
8263 // Use BT if the immediate can't be encoded in a TEST instruction.
8264 if (!isUInt<32>(AndRHSVal) && isPowerOf2_64(AndRHSVal)) {
8266 RHS = DAG.getConstant(Log2_64_Ceil(AndRHSVal), LHS.getValueType());
8270 if (LHS.getNode()) {
8271 // If LHS is i8, promote it to i32 with any_extend. There is no i8 BT
8272 // instruction. Since the shift amount is in-range-or-undefined, we know
8273 // that doing a bittest on the i32 value is ok. We extend to i32 because
8274 // the encoding for the i16 version is larger than the i32 version.
8275 // Also promote i16 to i32 for performance / code size reason.
8276 if (LHS.getValueType() == MVT::i8 ||
8277 LHS.getValueType() == MVT::i16)
8278 LHS = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, LHS);
8280 // If the operand types disagree, extend the shift amount to match. Since
8281 // BT ignores high bits (like shifts) we can use anyextend.
8282 if (LHS.getValueType() != RHS.getValueType())
8283 RHS = DAG.getNode(ISD::ANY_EXTEND, dl, LHS.getValueType(), RHS);
8285 SDValue BT = DAG.getNode(X86ISD::BT, dl, MVT::i32, LHS, RHS);
8286 unsigned Cond = CC == ISD::SETEQ ? X86::COND_AE : X86::COND_B;
8287 return DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
8288 DAG.getConstant(Cond, MVT::i8), BT);
8294 SDValue X86TargetLowering::LowerSETCC(SDValue Op, SelectionDAG &DAG) const {
8296 if (Op.getValueType().isVector()) return LowerVSETCC(Op, DAG);
8298 assert(Op.getValueType() == MVT::i8 && "SetCC type must be 8-bit integer");
8299 SDValue Op0 = Op.getOperand(0);
8300 SDValue Op1 = Op.getOperand(1);
8301 DebugLoc dl = Op.getDebugLoc();
8302 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(2))->get();
8304 // Optimize to BT if possible.
8305 // Lower (X & (1 << N)) == 0 to BT(X, N).
8306 // Lower ((X >>u N) & 1) != 0 to BT(X, N).
8307 // Lower ((X >>s N) & 1) != 0 to BT(X, N).
8308 if (Op0.getOpcode() == ISD::AND && Op0.hasOneUse() &&
8309 Op1.getOpcode() == ISD::Constant &&
8310 cast<ConstantSDNode>(Op1)->isNullValue() &&
8311 (CC == ISD::SETEQ || CC == ISD::SETNE)) {
8312 SDValue NewSetCC = LowerToBT(Op0, CC, dl, DAG);
8313 if (NewSetCC.getNode())
8317 // Look for X == 0, X == 1, X != 0, or X != 1. We can simplify some forms of
8319 if (Op1.getOpcode() == ISD::Constant &&
8320 (cast<ConstantSDNode>(Op1)->getZExtValue() == 1 ||
8321 cast<ConstantSDNode>(Op1)->isNullValue()) &&
8322 (CC == ISD::SETEQ || CC == ISD::SETNE)) {
8324 // If the input is a setcc, then reuse the input setcc or use a new one with
8325 // the inverted condition.
8326 if (Op0.getOpcode() == X86ISD::SETCC) {
8327 X86::CondCode CCode = (X86::CondCode)Op0.getConstantOperandVal(0);
8328 bool Invert = (CC == ISD::SETNE) ^
8329 cast<ConstantSDNode>(Op1)->isNullValue();
8330 if (!Invert) return Op0;
8332 CCode = X86::GetOppositeBranchCondition(CCode);
8333 return DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
8334 DAG.getConstant(CCode, MVT::i8), Op0.getOperand(1));
8338 bool isFP = Op1.getValueType().isFloatingPoint();
8339 unsigned X86CC = TranslateX86CC(CC, isFP, Op0, Op1, DAG);
8340 if (X86CC == X86::COND_INVALID)
8343 SDValue EFLAGS = EmitCmp(Op0, Op1, X86CC, DAG);
8344 return DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
8345 DAG.getConstant(X86CC, MVT::i8), EFLAGS);
8348 // Lower256IntVSETCC - Break a VSETCC 256-bit integer VSETCC into two new 128
8349 // ones, and then concatenate the result back.
8350 static SDValue Lower256IntVSETCC(SDValue Op, SelectionDAG &DAG) {
8351 EVT VT = Op.getValueType();
8353 assert(VT.getSizeInBits() == 256 && Op.getOpcode() == ISD::SETCC &&
8354 "Unsupported value type for operation");
8356 int NumElems = VT.getVectorNumElements();
8357 DebugLoc dl = Op.getDebugLoc();
8358 SDValue CC = Op.getOperand(2);
8359 SDValue Idx0 = DAG.getConstant(0, MVT::i32);
8360 SDValue Idx1 = DAG.getConstant(NumElems/2, MVT::i32);
8362 // Extract the LHS vectors
8363 SDValue LHS = Op.getOperand(0);
8364 SDValue LHS1 = Extract128BitVector(LHS, Idx0, DAG, dl);
8365 SDValue LHS2 = Extract128BitVector(LHS, Idx1, DAG, dl);
8367 // Extract the RHS vectors
8368 SDValue RHS = Op.getOperand(1);
8369 SDValue RHS1 = Extract128BitVector(RHS, Idx0, DAG, dl);
8370 SDValue RHS2 = Extract128BitVector(RHS, Idx1, DAG, dl);
8372 // Issue the operation on the smaller types and concatenate the result back
8373 MVT EltVT = VT.getVectorElementType().getSimpleVT();
8374 EVT NewVT = MVT::getVectorVT(EltVT, NumElems/2);
8375 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT,
8376 DAG.getNode(Op.getOpcode(), dl, NewVT, LHS1, RHS1, CC),
8377 DAG.getNode(Op.getOpcode(), dl, NewVT, LHS2, RHS2, CC));
8381 SDValue X86TargetLowering::LowerVSETCC(SDValue Op, SelectionDAG &DAG) const {
8383 SDValue Op0 = Op.getOperand(0);
8384 SDValue Op1 = Op.getOperand(1);
8385 SDValue CC = Op.getOperand(2);
8386 EVT VT = Op.getValueType();
8387 ISD::CondCode SetCCOpcode = cast<CondCodeSDNode>(CC)->get();
8388 bool isFP = Op.getOperand(1).getValueType().isFloatingPoint();
8389 DebugLoc dl = Op.getDebugLoc();
8393 EVT EltVT = Op0.getValueType().getVectorElementType();
8394 assert(EltVT == MVT::f32 || EltVT == MVT::f64); (void)EltVT;
8398 // SSE Condition code mapping:
8407 switch (SetCCOpcode) {
8410 case ISD::SETEQ: SSECC = 0; break;
8412 case ISD::SETGT: Swap = true; // Fallthrough
8414 case ISD::SETOLT: SSECC = 1; break;
8416 case ISD::SETGE: Swap = true; // Fallthrough
8418 case ISD::SETOLE: SSECC = 2; break;
8419 case ISD::SETUO: SSECC = 3; break;
8421 case ISD::SETNE: SSECC = 4; break;
8422 case ISD::SETULE: Swap = true;
8423 case ISD::SETUGE: SSECC = 5; break;
8424 case ISD::SETULT: Swap = true;
8425 case ISD::SETUGT: SSECC = 6; break;
8426 case ISD::SETO: SSECC = 7; break;
8429 std::swap(Op0, Op1);
8431 // In the two special cases we can't handle, emit two comparisons.
8433 if (SetCCOpcode == ISD::SETUEQ) {
8435 UNORD = DAG.getNode(X86ISD::CMPP, dl, VT, Op0, Op1,
8436 DAG.getConstant(3, MVT::i8));
8437 EQ = DAG.getNode(X86ISD::CMPP, dl, VT, Op0, Op1,
8438 DAG.getConstant(0, MVT::i8));
8439 return DAG.getNode(ISD::OR, dl, VT, UNORD, EQ);
8440 } else if (SetCCOpcode == ISD::SETONE) {
8442 ORD = DAG.getNode(X86ISD::CMPP, dl, VT, Op0, Op1,
8443 DAG.getConstant(7, MVT::i8));
8444 NEQ = DAG.getNode(X86ISD::CMPP, dl, VT, Op0, Op1,
8445 DAG.getConstant(4, MVT::i8));
8446 return DAG.getNode(ISD::AND, dl, VT, ORD, NEQ);
8448 llvm_unreachable("Illegal FP comparison");
8450 // Handle all other FP comparisons here.
8451 return DAG.getNode(X86ISD::CMPP, dl, VT, Op0, Op1,
8452 DAG.getConstant(SSECC, MVT::i8));
8455 // Break 256-bit integer vector compare into smaller ones.
8456 if (VT.getSizeInBits() == 256 && !Subtarget->hasAVX2())
8457 return Lower256IntVSETCC(Op, DAG);
8459 // We are handling one of the integer comparisons here. Since SSE only has
8460 // GT and EQ comparisons for integer, swapping operands and multiple
8461 // operations may be required for some comparisons.
8463 bool Swap = false, Invert = false, FlipSigns = false;
8465 switch (SetCCOpcode) {
8467 case ISD::SETNE: Invert = true;
8468 case ISD::SETEQ: Opc = X86ISD::PCMPEQ; break;
8469 case ISD::SETLT: Swap = true;
8470 case ISD::SETGT: Opc = X86ISD::PCMPGT; break;
8471 case ISD::SETGE: Swap = true;
8472 case ISD::SETLE: Opc = X86ISD::PCMPGT; Invert = true; break;
8473 case ISD::SETULT: Swap = true;
8474 case ISD::SETUGT: Opc = X86ISD::PCMPGT; FlipSigns = true; break;
8475 case ISD::SETUGE: Swap = true;
8476 case ISD::SETULE: Opc = X86ISD::PCMPGT; FlipSigns = true; Invert = true; break;
8479 std::swap(Op0, Op1);
8481 // Check that the operation in question is available (most are plain SSE2,
8482 // but PCMPGTQ and PCMPEQQ have different requirements).
8483 if (Opc == X86ISD::PCMPGT && VT == MVT::v2i64 && !Subtarget->hasSSE42())
8485 if (Opc == X86ISD::PCMPEQ && VT == MVT::v2i64 && !Subtarget->hasSSE41())
8488 // Since SSE has no unsigned integer comparisons, we need to flip the sign
8489 // bits of the inputs before performing those operations.
8491 EVT EltVT = VT.getVectorElementType();
8492 SDValue SignBit = DAG.getConstant(APInt::getSignBit(EltVT.getSizeInBits()),
8494 std::vector<SDValue> SignBits(VT.getVectorNumElements(), SignBit);
8495 SDValue SignVec = DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &SignBits[0],
8497 Op0 = DAG.getNode(ISD::XOR, dl, VT, Op0, SignVec);
8498 Op1 = DAG.getNode(ISD::XOR, dl, VT, Op1, SignVec);
8501 SDValue Result = DAG.getNode(Opc, dl, VT, Op0, Op1);
8503 // If the logical-not of the result is required, perform that now.
8505 Result = DAG.getNOT(dl, Result, VT);
8510 // isX86LogicalCmp - Return true if opcode is a X86 logical comparison.
8511 static bool isX86LogicalCmp(SDValue Op) {
8512 unsigned Opc = Op.getNode()->getOpcode();
8513 if (Opc == X86ISD::CMP || Opc == X86ISD::COMI || Opc == X86ISD::UCOMI)
8515 if (Op.getResNo() == 1 &&
8516 (Opc == X86ISD::ADD ||
8517 Opc == X86ISD::SUB ||
8518 Opc == X86ISD::ADC ||
8519 Opc == X86ISD::SBB ||
8520 Opc == X86ISD::SMUL ||
8521 Opc == X86ISD::UMUL ||
8522 Opc == X86ISD::INC ||
8523 Opc == X86ISD::DEC ||
8524 Opc == X86ISD::OR ||
8525 Opc == X86ISD::XOR ||
8526 Opc == X86ISD::AND))
8529 if (Op.getResNo() == 2 && Opc == X86ISD::UMUL)
8535 static bool isZero(SDValue V) {
8536 ConstantSDNode *C = dyn_cast<ConstantSDNode>(V);
8537 return C && C->isNullValue();
8540 static bool isAllOnes(SDValue V) {
8541 ConstantSDNode *C = dyn_cast<ConstantSDNode>(V);
8542 return C && C->isAllOnesValue();
8545 SDValue X86TargetLowering::LowerSELECT(SDValue Op, SelectionDAG &DAG) const {
8546 bool addTest = true;
8547 SDValue Cond = Op.getOperand(0);
8548 SDValue Op1 = Op.getOperand(1);
8549 SDValue Op2 = Op.getOperand(2);
8550 DebugLoc DL = Op.getDebugLoc();
8553 if (Cond.getOpcode() == ISD::SETCC) {
8554 SDValue NewCond = LowerSETCC(Cond, DAG);
8555 if (NewCond.getNode())
8559 // (select (x == 0), -1, y) -> (sign_bit (x - 1)) | y
8560 // (select (x == 0), y, -1) -> ~(sign_bit (x - 1)) | y
8561 // (select (x != 0), y, -1) -> (sign_bit (x - 1)) | y
8562 // (select (x != 0), -1, y) -> ~(sign_bit (x - 1)) | y
8563 if (Cond.getOpcode() == X86ISD::SETCC &&
8564 Cond.getOperand(1).getOpcode() == X86ISD::CMP &&
8565 isZero(Cond.getOperand(1).getOperand(1))) {
8566 SDValue Cmp = Cond.getOperand(1);
8568 unsigned CondCode =cast<ConstantSDNode>(Cond.getOperand(0))->getZExtValue();
8570 if ((isAllOnes(Op1) || isAllOnes(Op2)) &&
8571 (CondCode == X86::COND_E || CondCode == X86::COND_NE)) {
8572 SDValue Y = isAllOnes(Op2) ? Op1 : Op2;
8574 SDValue CmpOp0 = Cmp.getOperand(0);
8575 Cmp = DAG.getNode(X86ISD::CMP, DL, MVT::i32,
8576 CmpOp0, DAG.getConstant(1, CmpOp0.getValueType()));
8578 SDValue Res = // Res = 0 or -1.
8579 DAG.getNode(X86ISD::SETCC_CARRY, DL, Op.getValueType(),
8580 DAG.getConstant(X86::COND_B, MVT::i8), Cmp);
8582 if (isAllOnes(Op1) != (CondCode == X86::COND_E))
8583 Res = DAG.getNOT(DL, Res, Res.getValueType());
8585 ConstantSDNode *N2C = dyn_cast<ConstantSDNode>(Op2);
8586 if (N2C == 0 || !N2C->isNullValue())
8587 Res = DAG.getNode(ISD::OR, DL, Res.getValueType(), Res, Y);
8592 // Look past (and (setcc_carry (cmp ...)), 1).
8593 if (Cond.getOpcode() == ISD::AND &&
8594 Cond.getOperand(0).getOpcode() == X86ISD::SETCC_CARRY) {
8595 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Cond.getOperand(1));
8596 if (C && C->getAPIntValue() == 1)
8597 Cond = Cond.getOperand(0);
8600 // If condition flag is set by a X86ISD::CMP, then use it as the condition
8601 // setting operand in place of the X86ISD::SETCC.
8602 unsigned CondOpcode = Cond.getOpcode();
8603 if (CondOpcode == X86ISD::SETCC ||
8604 CondOpcode == X86ISD::SETCC_CARRY) {
8605 CC = Cond.getOperand(0);
8607 SDValue Cmp = Cond.getOperand(1);
8608 unsigned Opc = Cmp.getOpcode();
8609 EVT VT = Op.getValueType();
8611 bool IllegalFPCMov = false;
8612 if (VT.isFloatingPoint() && !VT.isVector() &&
8613 !isScalarFPTypeInSSEReg(VT)) // FPStack?
8614 IllegalFPCMov = !hasFPCMov(cast<ConstantSDNode>(CC)->getSExtValue());
8616 if ((isX86LogicalCmp(Cmp) && !IllegalFPCMov) ||
8617 Opc == X86ISD::BT) { // FIXME
8621 } else if (CondOpcode == ISD::USUBO || CondOpcode == ISD::SSUBO ||
8622 CondOpcode == ISD::UADDO || CondOpcode == ISD::SADDO ||
8623 ((CondOpcode == ISD::UMULO || CondOpcode == ISD::SMULO) &&
8624 Cond.getOperand(0).getValueType() != MVT::i8)) {
8625 SDValue LHS = Cond.getOperand(0);
8626 SDValue RHS = Cond.getOperand(1);
8630 switch (CondOpcode) {
8631 case ISD::UADDO: X86Opcode = X86ISD::ADD; X86Cond = X86::COND_B; break;
8632 case ISD::SADDO: X86Opcode = X86ISD::ADD; X86Cond = X86::COND_O; break;
8633 case ISD::USUBO: X86Opcode = X86ISD::SUB; X86Cond = X86::COND_B; break;
8634 case ISD::SSUBO: X86Opcode = X86ISD::SUB; X86Cond = X86::COND_O; break;
8635 case ISD::UMULO: X86Opcode = X86ISD::UMUL; X86Cond = X86::COND_O; break;
8636 case ISD::SMULO: X86Opcode = X86ISD::SMUL; X86Cond = X86::COND_O; break;
8637 default: llvm_unreachable("unexpected overflowing operator");
8639 if (CondOpcode == ISD::UMULO)
8640 VTs = DAG.getVTList(LHS.getValueType(), LHS.getValueType(),
8643 VTs = DAG.getVTList(LHS.getValueType(), MVT::i32);
8645 SDValue X86Op = DAG.getNode(X86Opcode, DL, VTs, LHS, RHS);
8647 if (CondOpcode == ISD::UMULO)
8648 Cond = X86Op.getValue(2);
8650 Cond = X86Op.getValue(1);
8652 CC = DAG.getConstant(X86Cond, MVT::i8);
8657 // Look pass the truncate.
8658 if (Cond.getOpcode() == ISD::TRUNCATE)
8659 Cond = Cond.getOperand(0);
8661 // We know the result of AND is compared against zero. Try to match
8663 if (Cond.getOpcode() == ISD::AND && Cond.hasOneUse()) {
8664 SDValue NewSetCC = LowerToBT(Cond, ISD::SETNE, DL, DAG);
8665 if (NewSetCC.getNode()) {
8666 CC = NewSetCC.getOperand(0);
8667 Cond = NewSetCC.getOperand(1);
8674 CC = DAG.getConstant(X86::COND_NE, MVT::i8);
8675 Cond = EmitTest(Cond, X86::COND_NE, DAG);
8678 // a < b ? -1 : 0 -> RES = ~setcc_carry
8679 // a < b ? 0 : -1 -> RES = setcc_carry
8680 // a >= b ? -1 : 0 -> RES = setcc_carry
8681 // a >= b ? 0 : -1 -> RES = ~setcc_carry
8682 if (Cond.getOpcode() == X86ISD::CMP) {
8683 unsigned CondCode = cast<ConstantSDNode>(CC)->getZExtValue();
8685 if ((CondCode == X86::COND_AE || CondCode == X86::COND_B) &&
8686 (isAllOnes(Op1) || isAllOnes(Op2)) && (isZero(Op1) || isZero(Op2))) {
8687 SDValue Res = DAG.getNode(X86ISD::SETCC_CARRY, DL, Op.getValueType(),
8688 DAG.getConstant(X86::COND_B, MVT::i8), Cond);
8689 if (isAllOnes(Op1) != (CondCode == X86::COND_B))
8690 return DAG.getNOT(DL, Res, Res.getValueType());
8695 // X86ISD::CMOV means set the result (which is operand 1) to the RHS if
8696 // condition is true.
8697 SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::Glue);
8698 SDValue Ops[] = { Op2, Op1, CC, Cond };
8699 return DAG.getNode(X86ISD::CMOV, DL, VTs, Ops, array_lengthof(Ops));
8702 // isAndOrOfSingleUseSetCCs - Return true if node is an ISD::AND or
8703 // ISD::OR of two X86ISD::SETCC nodes each of which has no other use apart
8704 // from the AND / OR.
8705 static bool isAndOrOfSetCCs(SDValue Op, unsigned &Opc) {
8706 Opc = Op.getOpcode();
8707 if (Opc != ISD::OR && Opc != ISD::AND)
8709 return (Op.getOperand(0).getOpcode() == X86ISD::SETCC &&
8710 Op.getOperand(0).hasOneUse() &&
8711 Op.getOperand(1).getOpcode() == X86ISD::SETCC &&
8712 Op.getOperand(1).hasOneUse());
8715 // isXor1OfSetCC - Return true if node is an ISD::XOR of a X86ISD::SETCC and
8716 // 1 and that the SETCC node has a single use.
8717 static bool isXor1OfSetCC(SDValue Op) {
8718 if (Op.getOpcode() != ISD::XOR)
8720 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(Op.getOperand(1));
8721 if (N1C && N1C->getAPIntValue() == 1) {
8722 return Op.getOperand(0).getOpcode() == X86ISD::SETCC &&
8723 Op.getOperand(0).hasOneUse();
8728 SDValue X86TargetLowering::LowerBRCOND(SDValue Op, SelectionDAG &DAG) const {
8729 bool addTest = true;
8730 SDValue Chain = Op.getOperand(0);
8731 SDValue Cond = Op.getOperand(1);
8732 SDValue Dest = Op.getOperand(2);
8733 DebugLoc dl = Op.getDebugLoc();
8735 bool Inverted = false;
8737 if (Cond.getOpcode() == ISD::SETCC) {
8738 // Check for setcc([su]{add,sub,mul}o == 0).
8739 if (cast<CondCodeSDNode>(Cond.getOperand(2))->get() == ISD::SETEQ &&
8740 isa<ConstantSDNode>(Cond.getOperand(1)) &&
8741 cast<ConstantSDNode>(Cond.getOperand(1))->isNullValue() &&
8742 Cond.getOperand(0).getResNo() == 1 &&
8743 (Cond.getOperand(0).getOpcode() == ISD::SADDO ||
8744 Cond.getOperand(0).getOpcode() == ISD::UADDO ||
8745 Cond.getOperand(0).getOpcode() == ISD::SSUBO ||
8746 Cond.getOperand(0).getOpcode() == ISD::USUBO ||
8747 Cond.getOperand(0).getOpcode() == ISD::SMULO ||
8748 Cond.getOperand(0).getOpcode() == ISD::UMULO)) {
8750 Cond = Cond.getOperand(0);
8752 SDValue NewCond = LowerSETCC(Cond, DAG);
8753 if (NewCond.getNode())
8758 // FIXME: LowerXALUO doesn't handle these!!
8759 else if (Cond.getOpcode() == X86ISD::ADD ||
8760 Cond.getOpcode() == X86ISD::SUB ||
8761 Cond.getOpcode() == X86ISD::SMUL ||
8762 Cond.getOpcode() == X86ISD::UMUL)
8763 Cond = LowerXALUO(Cond, DAG);
8766 // Look pass (and (setcc_carry (cmp ...)), 1).
8767 if (Cond.getOpcode() == ISD::AND &&
8768 Cond.getOperand(0).getOpcode() == X86ISD::SETCC_CARRY) {
8769 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Cond.getOperand(1));
8770 if (C && C->getAPIntValue() == 1)
8771 Cond = Cond.getOperand(0);
8774 // If condition flag is set by a X86ISD::CMP, then use it as the condition
8775 // setting operand in place of the X86ISD::SETCC.
8776 unsigned CondOpcode = Cond.getOpcode();
8777 if (CondOpcode == X86ISD::SETCC ||
8778 CondOpcode == X86ISD::SETCC_CARRY) {
8779 CC = Cond.getOperand(0);
8781 SDValue Cmp = Cond.getOperand(1);
8782 unsigned Opc = Cmp.getOpcode();
8783 // FIXME: WHY THE SPECIAL CASING OF LogicalCmp??
8784 if (isX86LogicalCmp(Cmp) || Opc == X86ISD::BT) {
8788 switch (cast<ConstantSDNode>(CC)->getZExtValue()) {
8792 // These can only come from an arithmetic instruction with overflow,
8793 // e.g. SADDO, UADDO.
8794 Cond = Cond.getNode()->getOperand(1);
8800 CondOpcode = Cond.getOpcode();
8801 if (CondOpcode == ISD::UADDO || CondOpcode == ISD::SADDO ||
8802 CondOpcode == ISD::USUBO || CondOpcode == ISD::SSUBO ||
8803 ((CondOpcode == ISD::UMULO || CondOpcode == ISD::SMULO) &&
8804 Cond.getOperand(0).getValueType() != MVT::i8)) {
8805 SDValue LHS = Cond.getOperand(0);
8806 SDValue RHS = Cond.getOperand(1);
8810 switch (CondOpcode) {
8811 case ISD::UADDO: X86Opcode = X86ISD::ADD; X86Cond = X86::COND_B; break;
8812 case ISD::SADDO: X86Opcode = X86ISD::ADD; X86Cond = X86::COND_O; break;
8813 case ISD::USUBO: X86Opcode = X86ISD::SUB; X86Cond = X86::COND_B; break;
8814 case ISD::SSUBO: X86Opcode = X86ISD::SUB; X86Cond = X86::COND_O; break;
8815 case ISD::UMULO: X86Opcode = X86ISD::UMUL; X86Cond = X86::COND_O; break;
8816 case ISD::SMULO: X86Opcode = X86ISD::SMUL; X86Cond = X86::COND_O; break;
8817 default: llvm_unreachable("unexpected overflowing operator");
8820 X86Cond = X86::GetOppositeBranchCondition((X86::CondCode)X86Cond);
8821 if (CondOpcode == ISD::UMULO)
8822 VTs = DAG.getVTList(LHS.getValueType(), LHS.getValueType(),
8825 VTs = DAG.getVTList(LHS.getValueType(), MVT::i32);
8827 SDValue X86Op = DAG.getNode(X86Opcode, dl, VTs, LHS, RHS);
8829 if (CondOpcode == ISD::UMULO)
8830 Cond = X86Op.getValue(2);
8832 Cond = X86Op.getValue(1);
8834 CC = DAG.getConstant(X86Cond, MVT::i8);
8838 if (Cond.hasOneUse() && isAndOrOfSetCCs(Cond, CondOpc)) {
8839 SDValue Cmp = Cond.getOperand(0).getOperand(1);
8840 if (CondOpc == ISD::OR) {
8841 // Also, recognize the pattern generated by an FCMP_UNE. We can emit
8842 // two branches instead of an explicit OR instruction with a
8844 if (Cmp == Cond.getOperand(1).getOperand(1) &&
8845 isX86LogicalCmp(Cmp)) {
8846 CC = Cond.getOperand(0).getOperand(0);
8847 Chain = DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
8848 Chain, Dest, CC, Cmp);
8849 CC = Cond.getOperand(1).getOperand(0);
8853 } else { // ISD::AND
8854 // Also, recognize the pattern generated by an FCMP_OEQ. We can emit
8855 // two branches instead of an explicit AND instruction with a
8856 // separate test. However, we only do this if this block doesn't
8857 // have a fall-through edge, because this requires an explicit
8858 // jmp when the condition is false.
8859 if (Cmp == Cond.getOperand(1).getOperand(1) &&
8860 isX86LogicalCmp(Cmp) &&
8861 Op.getNode()->hasOneUse()) {
8862 X86::CondCode CCode =
8863 (X86::CondCode)Cond.getOperand(0).getConstantOperandVal(0);
8864 CCode = X86::GetOppositeBranchCondition(CCode);
8865 CC = DAG.getConstant(CCode, MVT::i8);
8866 SDNode *User = *Op.getNode()->use_begin();
8867 // Look for an unconditional branch following this conditional branch.
8868 // We need this because we need to reverse the successors in order
8869 // to implement FCMP_OEQ.
8870 if (User->getOpcode() == ISD::BR) {
8871 SDValue FalseBB = User->getOperand(1);
8873 DAG.UpdateNodeOperands(User, User->getOperand(0), Dest);
8874 assert(NewBR == User);
8878 Chain = DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
8879 Chain, Dest, CC, Cmp);
8880 X86::CondCode CCode =
8881 (X86::CondCode)Cond.getOperand(1).getConstantOperandVal(0);
8882 CCode = X86::GetOppositeBranchCondition(CCode);
8883 CC = DAG.getConstant(CCode, MVT::i8);
8889 } else if (Cond.hasOneUse() && isXor1OfSetCC(Cond)) {
8890 // Recognize for xorb (setcc), 1 patterns. The xor inverts the condition.
8891 // It should be transformed during dag combiner except when the condition
8892 // is set by a arithmetics with overflow node.
8893 X86::CondCode CCode =
8894 (X86::CondCode)Cond.getOperand(0).getConstantOperandVal(0);
8895 CCode = X86::GetOppositeBranchCondition(CCode);
8896 CC = DAG.getConstant(CCode, MVT::i8);
8897 Cond = Cond.getOperand(0).getOperand(1);
8899 } else if (Cond.getOpcode() == ISD::SETCC &&
8900 cast<CondCodeSDNode>(Cond.getOperand(2))->get() == ISD::SETOEQ) {
8901 // For FCMP_OEQ, we can emit
8902 // two branches instead of an explicit AND instruction with a
8903 // separate test. However, we only do this if this block doesn't
8904 // have a fall-through edge, because this requires an explicit
8905 // jmp when the condition is false.
8906 if (Op.getNode()->hasOneUse()) {
8907 SDNode *User = *Op.getNode()->use_begin();
8908 // Look for an unconditional branch following this conditional branch.
8909 // We need this because we need to reverse the successors in order
8910 // to implement FCMP_OEQ.
8911 if (User->getOpcode() == ISD::BR) {
8912 SDValue FalseBB = User->getOperand(1);
8914 DAG.UpdateNodeOperands(User, User->getOperand(0), Dest);
8915 assert(NewBR == User);
8919 SDValue Cmp = DAG.getNode(X86ISD::CMP, dl, MVT::i32,
8920 Cond.getOperand(0), Cond.getOperand(1));
8921 CC = DAG.getConstant(X86::COND_NE, MVT::i8);
8922 Chain = DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
8923 Chain, Dest, CC, Cmp);
8924 CC = DAG.getConstant(X86::COND_P, MVT::i8);
8929 } else if (Cond.getOpcode() == ISD::SETCC &&
8930 cast<CondCodeSDNode>(Cond.getOperand(2))->get() == ISD::SETUNE) {
8931 // For FCMP_UNE, we can emit
8932 // two branches instead of an explicit AND instruction with a
8933 // separate test. However, we only do this if this block doesn't
8934 // have a fall-through edge, because this requires an explicit
8935 // jmp when the condition is false.
8936 if (Op.getNode()->hasOneUse()) {
8937 SDNode *User = *Op.getNode()->use_begin();
8938 // Look for an unconditional branch following this conditional branch.
8939 // We need this because we need to reverse the successors in order
8940 // to implement FCMP_UNE.
8941 if (User->getOpcode() == ISD::BR) {
8942 SDValue FalseBB = User->getOperand(1);
8944 DAG.UpdateNodeOperands(User, User->getOperand(0), Dest);
8945 assert(NewBR == User);
8948 SDValue Cmp = DAG.getNode(X86ISD::CMP, dl, MVT::i32,
8949 Cond.getOperand(0), Cond.getOperand(1));
8950 CC = DAG.getConstant(X86::COND_NE, MVT::i8);
8951 Chain = DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
8952 Chain, Dest, CC, Cmp);
8953 CC = DAG.getConstant(X86::COND_NP, MVT::i8);
8963 // Look pass the truncate.
8964 if (Cond.getOpcode() == ISD::TRUNCATE)
8965 Cond = Cond.getOperand(0);
8967 // We know the result of AND is compared against zero. Try to match
8969 if (Cond.getOpcode() == ISD::AND && Cond.hasOneUse()) {
8970 SDValue NewSetCC = LowerToBT(Cond, ISD::SETNE, dl, DAG);
8971 if (NewSetCC.getNode()) {
8972 CC = NewSetCC.getOperand(0);
8973 Cond = NewSetCC.getOperand(1);
8980 CC = DAG.getConstant(X86::COND_NE, MVT::i8);
8981 Cond = EmitTest(Cond, X86::COND_NE, DAG);
8983 return DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
8984 Chain, Dest, CC, Cond);
8988 // Lower dynamic stack allocation to _alloca call for Cygwin/Mingw targets.
8989 // Calls to _alloca is needed to probe the stack when allocating more than 4k
8990 // bytes in one go. Touching the stack at 4K increments is necessary to ensure
8991 // that the guard pages used by the OS virtual memory manager are allocated in
8992 // correct sequence.
8994 X86TargetLowering::LowerDYNAMIC_STACKALLOC(SDValue Op,
8995 SelectionDAG &DAG) const {
8996 assert((Subtarget->isTargetCygMing() || Subtarget->isTargetWindows() ||
8997 getTargetMachine().Options.EnableSegmentedStacks) &&
8998 "This should be used only on Windows targets or when segmented stacks "
9000 assert(!Subtarget->isTargetEnvMacho() && "Not implemented");
9001 DebugLoc dl = Op.getDebugLoc();
9004 SDValue Chain = Op.getOperand(0);
9005 SDValue Size = Op.getOperand(1);
9006 // FIXME: Ensure alignment here
9008 bool Is64Bit = Subtarget->is64Bit();
9009 EVT SPTy = Is64Bit ? MVT::i64 : MVT::i32;
9011 if (getTargetMachine().Options.EnableSegmentedStacks) {
9012 MachineFunction &MF = DAG.getMachineFunction();
9013 MachineRegisterInfo &MRI = MF.getRegInfo();
9016 // The 64 bit implementation of segmented stacks needs to clobber both r10
9017 // r11. This makes it impossible to use it along with nested parameters.
9018 const Function *F = MF.getFunction();
9020 for (Function::const_arg_iterator I = F->arg_begin(), E = F->arg_end();
9022 if (I->hasNestAttr())
9023 report_fatal_error("Cannot use segmented stacks with functions that "
9024 "have nested arguments.");
9027 const TargetRegisterClass *AddrRegClass =
9028 getRegClassFor(Subtarget->is64Bit() ? MVT::i64:MVT::i32);
9029 unsigned Vreg = MRI.createVirtualRegister(AddrRegClass);
9030 Chain = DAG.getCopyToReg(Chain, dl, Vreg, Size);
9031 SDValue Value = DAG.getNode(X86ISD::SEG_ALLOCA, dl, SPTy, Chain,
9032 DAG.getRegister(Vreg, SPTy));
9033 SDValue Ops1[2] = { Value, Chain };
9034 return DAG.getMergeValues(Ops1, 2, dl);
9037 unsigned Reg = (Subtarget->is64Bit() ? X86::RAX : X86::EAX);
9039 Chain = DAG.getCopyToReg(Chain, dl, Reg, Size, Flag);
9040 Flag = Chain.getValue(1);
9041 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
9043 Chain = DAG.getNode(X86ISD::WIN_ALLOCA, dl, NodeTys, Chain, Flag);
9044 Flag = Chain.getValue(1);
9046 Chain = DAG.getCopyFromReg(Chain, dl, X86StackPtr, SPTy).getValue(1);
9048 SDValue Ops1[2] = { Chain.getValue(0), Chain };
9049 return DAG.getMergeValues(Ops1, 2, dl);
9053 SDValue X86TargetLowering::LowerVASTART(SDValue Op, SelectionDAG &DAG) const {
9054 MachineFunction &MF = DAG.getMachineFunction();
9055 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
9057 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
9058 DebugLoc DL = Op.getDebugLoc();
9060 if (!Subtarget->is64Bit() || Subtarget->isTargetWin64()) {
9061 // vastart just stores the address of the VarArgsFrameIndex slot into the
9062 // memory location argument.
9063 SDValue FR = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(),
9065 return DAG.getStore(Op.getOperand(0), DL, FR, Op.getOperand(1),
9066 MachinePointerInfo(SV), false, false, 0);
9070 // gp_offset (0 - 6 * 8)
9071 // fp_offset (48 - 48 + 8 * 16)
9072 // overflow_arg_area (point to parameters coming in memory).
9074 SmallVector<SDValue, 8> MemOps;
9075 SDValue FIN = Op.getOperand(1);
9077 SDValue Store = DAG.getStore(Op.getOperand(0), DL,
9078 DAG.getConstant(FuncInfo->getVarArgsGPOffset(),
9080 FIN, MachinePointerInfo(SV), false, false, 0);
9081 MemOps.push_back(Store);
9084 FIN = DAG.getNode(ISD::ADD, DL, getPointerTy(),
9085 FIN, DAG.getIntPtrConstant(4));
9086 Store = DAG.getStore(Op.getOperand(0), DL,
9087 DAG.getConstant(FuncInfo->getVarArgsFPOffset(),
9089 FIN, MachinePointerInfo(SV, 4), false, false, 0);
9090 MemOps.push_back(Store);
9092 // Store ptr to overflow_arg_area
9093 FIN = DAG.getNode(ISD::ADD, DL, getPointerTy(),
9094 FIN, DAG.getIntPtrConstant(4));
9095 SDValue OVFIN = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(),
9097 Store = DAG.getStore(Op.getOperand(0), DL, OVFIN, FIN,
9098 MachinePointerInfo(SV, 8),
9100 MemOps.push_back(Store);
9102 // Store ptr to reg_save_area.
9103 FIN = DAG.getNode(ISD::ADD, DL, getPointerTy(),
9104 FIN, DAG.getIntPtrConstant(8));
9105 SDValue RSFIN = DAG.getFrameIndex(FuncInfo->getRegSaveFrameIndex(),
9107 Store = DAG.getStore(Op.getOperand(0), DL, RSFIN, FIN,
9108 MachinePointerInfo(SV, 16), false, false, 0);
9109 MemOps.push_back(Store);
9110 return DAG.getNode(ISD::TokenFactor, DL, MVT::Other,
9111 &MemOps[0], MemOps.size());
9114 SDValue X86TargetLowering::LowerVAARG(SDValue Op, SelectionDAG &DAG) const {
9115 assert(Subtarget->is64Bit() &&
9116 "LowerVAARG only handles 64-bit va_arg!");
9117 assert((Subtarget->isTargetLinux() ||
9118 Subtarget->isTargetDarwin()) &&
9119 "Unhandled target in LowerVAARG");
9120 assert(Op.getNode()->getNumOperands() == 4);
9121 SDValue Chain = Op.getOperand(0);
9122 SDValue SrcPtr = Op.getOperand(1);
9123 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
9124 unsigned Align = Op.getConstantOperandVal(3);
9125 DebugLoc dl = Op.getDebugLoc();
9127 EVT ArgVT = Op.getNode()->getValueType(0);
9128 Type *ArgTy = ArgVT.getTypeForEVT(*DAG.getContext());
9129 uint32_t ArgSize = getTargetData()->getTypeAllocSize(ArgTy);
9132 // Decide which area this value should be read from.
9133 // TODO: Implement the AMD64 ABI in its entirety. This simple
9134 // selection mechanism works only for the basic types.
9135 if (ArgVT == MVT::f80) {
9136 llvm_unreachable("va_arg for f80 not yet implemented");
9137 } else if (ArgVT.isFloatingPoint() && ArgSize <= 16 /*bytes*/) {
9138 ArgMode = 2; // Argument passed in XMM register. Use fp_offset.
9139 } else if (ArgVT.isInteger() && ArgSize <= 32 /*bytes*/) {
9140 ArgMode = 1; // Argument passed in GPR64 register(s). Use gp_offset.
9142 llvm_unreachable("Unhandled argument type in LowerVAARG");
9146 // Sanity Check: Make sure using fp_offset makes sense.
9147 assert(!getTargetMachine().Options.UseSoftFloat &&
9148 !(DAG.getMachineFunction()
9149 .getFunction()->hasFnAttr(Attribute::NoImplicitFloat)) &&
9150 Subtarget->hasSSE1());
9153 // Insert VAARG_64 node into the DAG
9154 // VAARG_64 returns two values: Variable Argument Address, Chain
9155 SmallVector<SDValue, 11> InstOps;
9156 InstOps.push_back(Chain);
9157 InstOps.push_back(SrcPtr);
9158 InstOps.push_back(DAG.getConstant(ArgSize, MVT::i32));
9159 InstOps.push_back(DAG.getConstant(ArgMode, MVT::i8));
9160 InstOps.push_back(DAG.getConstant(Align, MVT::i32));
9161 SDVTList VTs = DAG.getVTList(getPointerTy(), MVT::Other);
9162 SDValue VAARG = DAG.getMemIntrinsicNode(X86ISD::VAARG_64, dl,
9163 VTs, &InstOps[0], InstOps.size(),
9165 MachinePointerInfo(SV),
9170 Chain = VAARG.getValue(1);
9172 // Load the next argument and return it
9173 return DAG.getLoad(ArgVT, dl,
9176 MachinePointerInfo(),
9177 false, false, false, 0);
9180 SDValue X86TargetLowering::LowerVACOPY(SDValue Op, SelectionDAG &DAG) const {
9181 // X86-64 va_list is a struct { i32, i32, i8*, i8* }.
9182 assert(Subtarget->is64Bit() && "This code only handles 64-bit va_copy!");
9183 SDValue Chain = Op.getOperand(0);
9184 SDValue DstPtr = Op.getOperand(1);
9185 SDValue SrcPtr = Op.getOperand(2);
9186 const Value *DstSV = cast<SrcValueSDNode>(Op.getOperand(3))->getValue();
9187 const Value *SrcSV = cast<SrcValueSDNode>(Op.getOperand(4))->getValue();
9188 DebugLoc DL = Op.getDebugLoc();
9190 return DAG.getMemcpy(Chain, DL, DstPtr, SrcPtr,
9191 DAG.getIntPtrConstant(24), 8, /*isVolatile*/false,
9193 MachinePointerInfo(DstSV), MachinePointerInfo(SrcSV));
9196 // getTargetVShiftNOde - Handle vector element shifts where the shift amount
9197 // may or may not be a constant. Takes immediate version of shift as input.
9198 static SDValue getTargetVShiftNode(unsigned Opc, DebugLoc dl, EVT VT,
9199 SDValue SrcOp, SDValue ShAmt,
9200 SelectionDAG &DAG) {
9201 assert(ShAmt.getValueType() == MVT::i32 && "ShAmt is not i32");
9203 if (isa<ConstantSDNode>(ShAmt)) {
9205 default: llvm_unreachable("Unknown target vector shift node");
9209 return DAG.getNode(Opc, dl, VT, SrcOp, ShAmt);
9213 // Change opcode to non-immediate version
9215 default: llvm_unreachable("Unknown target vector shift node");
9216 case X86ISD::VSHLI: Opc = X86ISD::VSHL; break;
9217 case X86ISD::VSRLI: Opc = X86ISD::VSRL; break;
9218 case X86ISD::VSRAI: Opc = X86ISD::VSRA; break;
9221 // Need to build a vector containing shift amount
9222 // Shift amount is 32-bits, but SSE instructions read 64-bit, so fill with 0
9225 ShOps[1] = DAG.getConstant(0, MVT::i32);
9226 ShOps[2] = DAG.getUNDEF(MVT::i32);
9227 ShOps[3] = DAG.getUNDEF(MVT::i32);
9228 ShAmt = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, &ShOps[0], 4);
9229 ShAmt = DAG.getNode(ISD::BITCAST, dl, VT, ShAmt);
9230 return DAG.getNode(Opc, dl, VT, SrcOp, ShAmt);
9234 X86TargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) const {
9235 DebugLoc dl = Op.getDebugLoc();
9236 unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
9238 default: return SDValue(); // Don't custom lower most intrinsics.
9239 // Comparison intrinsics.
9240 case Intrinsic::x86_sse_comieq_ss:
9241 case Intrinsic::x86_sse_comilt_ss:
9242 case Intrinsic::x86_sse_comile_ss:
9243 case Intrinsic::x86_sse_comigt_ss:
9244 case Intrinsic::x86_sse_comige_ss:
9245 case Intrinsic::x86_sse_comineq_ss:
9246 case Intrinsic::x86_sse_ucomieq_ss:
9247 case Intrinsic::x86_sse_ucomilt_ss:
9248 case Intrinsic::x86_sse_ucomile_ss:
9249 case Intrinsic::x86_sse_ucomigt_ss:
9250 case Intrinsic::x86_sse_ucomige_ss:
9251 case Intrinsic::x86_sse_ucomineq_ss:
9252 case Intrinsic::x86_sse2_comieq_sd:
9253 case Intrinsic::x86_sse2_comilt_sd:
9254 case Intrinsic::x86_sse2_comile_sd:
9255 case Intrinsic::x86_sse2_comigt_sd:
9256 case Intrinsic::x86_sse2_comige_sd:
9257 case Intrinsic::x86_sse2_comineq_sd:
9258 case Intrinsic::x86_sse2_ucomieq_sd:
9259 case Intrinsic::x86_sse2_ucomilt_sd:
9260 case Intrinsic::x86_sse2_ucomile_sd:
9261 case Intrinsic::x86_sse2_ucomigt_sd:
9262 case Intrinsic::x86_sse2_ucomige_sd:
9263 case Intrinsic::x86_sse2_ucomineq_sd: {
9265 ISD::CondCode CC = ISD::SETCC_INVALID;
9267 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
9268 case Intrinsic::x86_sse_comieq_ss:
9269 case Intrinsic::x86_sse2_comieq_sd:
9273 case Intrinsic::x86_sse_comilt_ss:
9274 case Intrinsic::x86_sse2_comilt_sd:
9278 case Intrinsic::x86_sse_comile_ss:
9279 case Intrinsic::x86_sse2_comile_sd:
9283 case Intrinsic::x86_sse_comigt_ss:
9284 case Intrinsic::x86_sse2_comigt_sd:
9288 case Intrinsic::x86_sse_comige_ss:
9289 case Intrinsic::x86_sse2_comige_sd:
9293 case Intrinsic::x86_sse_comineq_ss:
9294 case Intrinsic::x86_sse2_comineq_sd:
9298 case Intrinsic::x86_sse_ucomieq_ss:
9299 case Intrinsic::x86_sse2_ucomieq_sd:
9300 Opc = X86ISD::UCOMI;
9303 case Intrinsic::x86_sse_ucomilt_ss:
9304 case Intrinsic::x86_sse2_ucomilt_sd:
9305 Opc = X86ISD::UCOMI;
9308 case Intrinsic::x86_sse_ucomile_ss:
9309 case Intrinsic::x86_sse2_ucomile_sd:
9310 Opc = X86ISD::UCOMI;
9313 case Intrinsic::x86_sse_ucomigt_ss:
9314 case Intrinsic::x86_sse2_ucomigt_sd:
9315 Opc = X86ISD::UCOMI;
9318 case Intrinsic::x86_sse_ucomige_ss:
9319 case Intrinsic::x86_sse2_ucomige_sd:
9320 Opc = X86ISD::UCOMI;
9323 case Intrinsic::x86_sse_ucomineq_ss:
9324 case Intrinsic::x86_sse2_ucomineq_sd:
9325 Opc = X86ISD::UCOMI;
9330 SDValue LHS = Op.getOperand(1);
9331 SDValue RHS = Op.getOperand(2);
9332 unsigned X86CC = TranslateX86CC(CC, true, LHS, RHS, DAG);
9333 assert(X86CC != X86::COND_INVALID && "Unexpected illegal condition!");
9334 SDValue Cond = DAG.getNode(Opc, dl, MVT::i32, LHS, RHS);
9335 SDValue SetCC = DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
9336 DAG.getConstant(X86CC, MVT::i8), Cond);
9337 return DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, SetCC);
9339 // XOP comparison intrinsics
9340 case Intrinsic::x86_xop_vpcomltb:
9341 case Intrinsic::x86_xop_vpcomltw:
9342 case Intrinsic::x86_xop_vpcomltd:
9343 case Intrinsic::x86_xop_vpcomltq:
9344 case Intrinsic::x86_xop_vpcomltub:
9345 case Intrinsic::x86_xop_vpcomltuw:
9346 case Intrinsic::x86_xop_vpcomltud:
9347 case Intrinsic::x86_xop_vpcomltuq:
9348 case Intrinsic::x86_xop_vpcomleb:
9349 case Intrinsic::x86_xop_vpcomlew:
9350 case Intrinsic::x86_xop_vpcomled:
9351 case Intrinsic::x86_xop_vpcomleq:
9352 case Intrinsic::x86_xop_vpcomleub:
9353 case Intrinsic::x86_xop_vpcomleuw:
9354 case Intrinsic::x86_xop_vpcomleud:
9355 case Intrinsic::x86_xop_vpcomleuq:
9356 case Intrinsic::x86_xop_vpcomgtb:
9357 case Intrinsic::x86_xop_vpcomgtw:
9358 case Intrinsic::x86_xop_vpcomgtd:
9359 case Intrinsic::x86_xop_vpcomgtq:
9360 case Intrinsic::x86_xop_vpcomgtub:
9361 case Intrinsic::x86_xop_vpcomgtuw:
9362 case Intrinsic::x86_xop_vpcomgtud:
9363 case Intrinsic::x86_xop_vpcomgtuq:
9364 case Intrinsic::x86_xop_vpcomgeb:
9365 case Intrinsic::x86_xop_vpcomgew:
9366 case Intrinsic::x86_xop_vpcomged:
9367 case Intrinsic::x86_xop_vpcomgeq:
9368 case Intrinsic::x86_xop_vpcomgeub:
9369 case Intrinsic::x86_xop_vpcomgeuw:
9370 case Intrinsic::x86_xop_vpcomgeud:
9371 case Intrinsic::x86_xop_vpcomgeuq:
9372 case Intrinsic::x86_xop_vpcomeqb:
9373 case Intrinsic::x86_xop_vpcomeqw:
9374 case Intrinsic::x86_xop_vpcomeqd:
9375 case Intrinsic::x86_xop_vpcomeqq:
9376 case Intrinsic::x86_xop_vpcomequb:
9377 case Intrinsic::x86_xop_vpcomequw:
9378 case Intrinsic::x86_xop_vpcomequd:
9379 case Intrinsic::x86_xop_vpcomequq:
9380 case Intrinsic::x86_xop_vpcomneb:
9381 case Intrinsic::x86_xop_vpcomnew:
9382 case Intrinsic::x86_xop_vpcomned:
9383 case Intrinsic::x86_xop_vpcomneq:
9384 case Intrinsic::x86_xop_vpcomneub:
9385 case Intrinsic::x86_xop_vpcomneuw:
9386 case Intrinsic::x86_xop_vpcomneud:
9387 case Intrinsic::x86_xop_vpcomneuq:
9388 case Intrinsic::x86_xop_vpcomfalseb:
9389 case Intrinsic::x86_xop_vpcomfalsew:
9390 case Intrinsic::x86_xop_vpcomfalsed:
9391 case Intrinsic::x86_xop_vpcomfalseq:
9392 case Intrinsic::x86_xop_vpcomfalseub:
9393 case Intrinsic::x86_xop_vpcomfalseuw:
9394 case Intrinsic::x86_xop_vpcomfalseud:
9395 case Intrinsic::x86_xop_vpcomfalseuq:
9396 case Intrinsic::x86_xop_vpcomtrueb:
9397 case Intrinsic::x86_xop_vpcomtruew:
9398 case Intrinsic::x86_xop_vpcomtrued:
9399 case Intrinsic::x86_xop_vpcomtrueq:
9400 case Intrinsic::x86_xop_vpcomtrueub:
9401 case Intrinsic::x86_xop_vpcomtrueuw:
9402 case Intrinsic::x86_xop_vpcomtrueud:
9403 case Intrinsic::x86_xop_vpcomtrueuq: {
9408 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
9409 case Intrinsic::x86_xop_vpcomltb:
9410 case Intrinsic::x86_xop_vpcomltw:
9411 case Intrinsic::x86_xop_vpcomltd:
9412 case Intrinsic::x86_xop_vpcomltq:
9414 Opc = X86ISD::VPCOM;
9416 case Intrinsic::x86_xop_vpcomltub:
9417 case Intrinsic::x86_xop_vpcomltuw:
9418 case Intrinsic::x86_xop_vpcomltud:
9419 case Intrinsic::x86_xop_vpcomltuq:
9421 Opc = X86ISD::VPCOMU;
9423 case Intrinsic::x86_xop_vpcomleb:
9424 case Intrinsic::x86_xop_vpcomlew:
9425 case Intrinsic::x86_xop_vpcomled:
9426 case Intrinsic::x86_xop_vpcomleq:
9428 Opc = X86ISD::VPCOM;
9430 case Intrinsic::x86_xop_vpcomleub:
9431 case Intrinsic::x86_xop_vpcomleuw:
9432 case Intrinsic::x86_xop_vpcomleud:
9433 case Intrinsic::x86_xop_vpcomleuq:
9435 Opc = X86ISD::VPCOMU;
9437 case Intrinsic::x86_xop_vpcomgtb:
9438 case Intrinsic::x86_xop_vpcomgtw:
9439 case Intrinsic::x86_xop_vpcomgtd:
9440 case Intrinsic::x86_xop_vpcomgtq:
9442 Opc = X86ISD::VPCOM;
9444 case Intrinsic::x86_xop_vpcomgtub:
9445 case Intrinsic::x86_xop_vpcomgtuw:
9446 case Intrinsic::x86_xop_vpcomgtud:
9447 case Intrinsic::x86_xop_vpcomgtuq:
9449 Opc = X86ISD::VPCOMU;
9451 case Intrinsic::x86_xop_vpcomgeb:
9452 case Intrinsic::x86_xop_vpcomgew:
9453 case Intrinsic::x86_xop_vpcomged:
9454 case Intrinsic::x86_xop_vpcomgeq:
9456 Opc = X86ISD::VPCOM;
9458 case Intrinsic::x86_xop_vpcomgeub:
9459 case Intrinsic::x86_xop_vpcomgeuw:
9460 case Intrinsic::x86_xop_vpcomgeud:
9461 case Intrinsic::x86_xop_vpcomgeuq:
9463 Opc = X86ISD::VPCOMU;
9465 case Intrinsic::x86_xop_vpcomeqb:
9466 case Intrinsic::x86_xop_vpcomeqw:
9467 case Intrinsic::x86_xop_vpcomeqd:
9468 case Intrinsic::x86_xop_vpcomeqq:
9470 Opc = X86ISD::VPCOM;
9472 case Intrinsic::x86_xop_vpcomequb:
9473 case Intrinsic::x86_xop_vpcomequw:
9474 case Intrinsic::x86_xop_vpcomequd:
9475 case Intrinsic::x86_xop_vpcomequq:
9477 Opc = X86ISD::VPCOMU;
9479 case Intrinsic::x86_xop_vpcomneb:
9480 case Intrinsic::x86_xop_vpcomnew:
9481 case Intrinsic::x86_xop_vpcomned:
9482 case Intrinsic::x86_xop_vpcomneq:
9484 Opc = X86ISD::VPCOM;
9486 case Intrinsic::x86_xop_vpcomneub:
9487 case Intrinsic::x86_xop_vpcomneuw:
9488 case Intrinsic::x86_xop_vpcomneud:
9489 case Intrinsic::x86_xop_vpcomneuq:
9491 Opc = X86ISD::VPCOMU;
9493 case Intrinsic::x86_xop_vpcomfalseb:
9494 case Intrinsic::x86_xop_vpcomfalsew:
9495 case Intrinsic::x86_xop_vpcomfalsed:
9496 case Intrinsic::x86_xop_vpcomfalseq:
9498 Opc = X86ISD::VPCOM;
9500 case Intrinsic::x86_xop_vpcomfalseub:
9501 case Intrinsic::x86_xop_vpcomfalseuw:
9502 case Intrinsic::x86_xop_vpcomfalseud:
9503 case Intrinsic::x86_xop_vpcomfalseuq:
9505 Opc = X86ISD::VPCOMU;
9507 case Intrinsic::x86_xop_vpcomtrueb:
9508 case Intrinsic::x86_xop_vpcomtruew:
9509 case Intrinsic::x86_xop_vpcomtrued:
9510 case Intrinsic::x86_xop_vpcomtrueq:
9512 Opc = X86ISD::VPCOM;
9514 case Intrinsic::x86_xop_vpcomtrueub:
9515 case Intrinsic::x86_xop_vpcomtrueuw:
9516 case Intrinsic::x86_xop_vpcomtrueud:
9517 case Intrinsic::x86_xop_vpcomtrueuq:
9519 Opc = X86ISD::VPCOMU;
9523 SDValue LHS = Op.getOperand(1);
9524 SDValue RHS = Op.getOperand(2);
9525 return DAG.getNode(Opc, dl, Op.getValueType(), LHS, RHS,
9526 DAG.getConstant(CC, MVT::i8));
9529 // Arithmetic intrinsics.
9530 case Intrinsic::x86_sse2_pmulu_dq:
9531 case Intrinsic::x86_avx2_pmulu_dq:
9532 return DAG.getNode(X86ISD::PMULUDQ, dl, Op.getValueType(),
9533 Op.getOperand(1), Op.getOperand(2));
9534 case Intrinsic::x86_sse3_hadd_ps:
9535 case Intrinsic::x86_sse3_hadd_pd:
9536 case Intrinsic::x86_avx_hadd_ps_256:
9537 case Intrinsic::x86_avx_hadd_pd_256:
9538 return DAG.getNode(X86ISD::FHADD, dl, Op.getValueType(),
9539 Op.getOperand(1), Op.getOperand(2));
9540 case Intrinsic::x86_sse3_hsub_ps:
9541 case Intrinsic::x86_sse3_hsub_pd:
9542 case Intrinsic::x86_avx_hsub_ps_256:
9543 case Intrinsic::x86_avx_hsub_pd_256:
9544 return DAG.getNode(X86ISD::FHSUB, dl, Op.getValueType(),
9545 Op.getOperand(1), Op.getOperand(2));
9546 case Intrinsic::x86_ssse3_phadd_w_128:
9547 case Intrinsic::x86_ssse3_phadd_d_128:
9548 case Intrinsic::x86_avx2_phadd_w:
9549 case Intrinsic::x86_avx2_phadd_d:
9550 return DAG.getNode(X86ISD::HADD, dl, Op.getValueType(),
9551 Op.getOperand(1), Op.getOperand(2));
9552 case Intrinsic::x86_ssse3_phsub_w_128:
9553 case Intrinsic::x86_ssse3_phsub_d_128:
9554 case Intrinsic::x86_avx2_phsub_w:
9555 case Intrinsic::x86_avx2_phsub_d:
9556 return DAG.getNode(X86ISD::HSUB, dl, Op.getValueType(),
9557 Op.getOperand(1), Op.getOperand(2));
9558 case Intrinsic::x86_avx2_psllv_d:
9559 case Intrinsic::x86_avx2_psllv_q:
9560 case Intrinsic::x86_avx2_psllv_d_256:
9561 case Intrinsic::x86_avx2_psllv_q_256:
9562 return DAG.getNode(ISD::SHL, dl, Op.getValueType(),
9563 Op.getOperand(1), Op.getOperand(2));
9564 case Intrinsic::x86_avx2_psrlv_d:
9565 case Intrinsic::x86_avx2_psrlv_q:
9566 case Intrinsic::x86_avx2_psrlv_d_256:
9567 case Intrinsic::x86_avx2_psrlv_q_256:
9568 return DAG.getNode(ISD::SRL, dl, Op.getValueType(),
9569 Op.getOperand(1), Op.getOperand(2));
9570 case Intrinsic::x86_avx2_psrav_d:
9571 case Intrinsic::x86_avx2_psrav_d_256:
9572 return DAG.getNode(ISD::SRA, dl, Op.getValueType(),
9573 Op.getOperand(1), Op.getOperand(2));
9574 case Intrinsic::x86_ssse3_pshuf_b_128:
9575 case Intrinsic::x86_avx2_pshuf_b:
9576 return DAG.getNode(X86ISD::PSHUFB, dl, Op.getValueType(),
9577 Op.getOperand(1), Op.getOperand(2));
9578 case Intrinsic::x86_ssse3_psign_b_128:
9579 case Intrinsic::x86_ssse3_psign_w_128:
9580 case Intrinsic::x86_ssse3_psign_d_128:
9581 case Intrinsic::x86_avx2_psign_b:
9582 case Intrinsic::x86_avx2_psign_w:
9583 case Intrinsic::x86_avx2_psign_d:
9584 return DAG.getNode(X86ISD::PSIGN, dl, Op.getValueType(),
9585 Op.getOperand(1), Op.getOperand(2));
9586 case Intrinsic::x86_sse41_insertps:
9587 return DAG.getNode(X86ISD::INSERTPS, dl, Op.getValueType(),
9588 Op.getOperand(1), Op.getOperand(2), Op.getOperand(3));
9589 case Intrinsic::x86_avx_vperm2f128_ps_256:
9590 case Intrinsic::x86_avx_vperm2f128_pd_256:
9591 case Intrinsic::x86_avx_vperm2f128_si_256:
9592 case Intrinsic::x86_avx2_vperm2i128:
9593 return DAG.getNode(X86ISD::VPERM2X128, dl, Op.getValueType(),
9594 Op.getOperand(1), Op.getOperand(2), Op.getOperand(3));
9595 case Intrinsic::x86_avx2_permd:
9596 case Intrinsic::x86_avx2_permps:
9597 // Operands intentionally swapped. Mask is last operand to intrinsic,
9598 // but second operand for node/intruction.
9599 return DAG.getNode(X86ISD::VPERMV, dl, Op.getValueType(),
9600 Op.getOperand(2), Op.getOperand(1));
9602 // ptest and testp intrinsics. The intrinsic these come from are designed to
9603 // return an integer value, not just an instruction so lower it to the ptest
9604 // or testp pattern and a setcc for the result.
9605 case Intrinsic::x86_sse41_ptestz:
9606 case Intrinsic::x86_sse41_ptestc:
9607 case Intrinsic::x86_sse41_ptestnzc:
9608 case Intrinsic::x86_avx_ptestz_256:
9609 case Intrinsic::x86_avx_ptestc_256:
9610 case Intrinsic::x86_avx_ptestnzc_256:
9611 case Intrinsic::x86_avx_vtestz_ps:
9612 case Intrinsic::x86_avx_vtestc_ps:
9613 case Intrinsic::x86_avx_vtestnzc_ps:
9614 case Intrinsic::x86_avx_vtestz_pd:
9615 case Intrinsic::x86_avx_vtestc_pd:
9616 case Intrinsic::x86_avx_vtestnzc_pd:
9617 case Intrinsic::x86_avx_vtestz_ps_256:
9618 case Intrinsic::x86_avx_vtestc_ps_256:
9619 case Intrinsic::x86_avx_vtestnzc_ps_256:
9620 case Intrinsic::x86_avx_vtestz_pd_256:
9621 case Intrinsic::x86_avx_vtestc_pd_256:
9622 case Intrinsic::x86_avx_vtestnzc_pd_256: {
9623 bool IsTestPacked = false;
9626 default: llvm_unreachable("Bad fallthrough in Intrinsic lowering.");
9627 case Intrinsic::x86_avx_vtestz_ps:
9628 case Intrinsic::x86_avx_vtestz_pd:
9629 case Intrinsic::x86_avx_vtestz_ps_256:
9630 case Intrinsic::x86_avx_vtestz_pd_256:
9631 IsTestPacked = true; // Fallthrough
9632 case Intrinsic::x86_sse41_ptestz:
9633 case Intrinsic::x86_avx_ptestz_256:
9635 X86CC = X86::COND_E;
9637 case Intrinsic::x86_avx_vtestc_ps:
9638 case Intrinsic::x86_avx_vtestc_pd:
9639 case Intrinsic::x86_avx_vtestc_ps_256:
9640 case Intrinsic::x86_avx_vtestc_pd_256:
9641 IsTestPacked = true; // Fallthrough
9642 case Intrinsic::x86_sse41_ptestc:
9643 case Intrinsic::x86_avx_ptestc_256:
9645 X86CC = X86::COND_B;
9647 case Intrinsic::x86_avx_vtestnzc_ps:
9648 case Intrinsic::x86_avx_vtestnzc_pd:
9649 case Intrinsic::x86_avx_vtestnzc_ps_256:
9650 case Intrinsic::x86_avx_vtestnzc_pd_256:
9651 IsTestPacked = true; // Fallthrough
9652 case Intrinsic::x86_sse41_ptestnzc:
9653 case Intrinsic::x86_avx_ptestnzc_256:
9655 X86CC = X86::COND_A;
9659 SDValue LHS = Op.getOperand(1);
9660 SDValue RHS = Op.getOperand(2);
9661 unsigned TestOpc = IsTestPacked ? X86ISD::TESTP : X86ISD::PTEST;
9662 SDValue Test = DAG.getNode(TestOpc, dl, MVT::i32, LHS, RHS);
9663 SDValue CC = DAG.getConstant(X86CC, MVT::i8);
9664 SDValue SetCC = DAG.getNode(X86ISD::SETCC, dl, MVT::i8, CC, Test);
9665 return DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, SetCC);
9668 // SSE/AVX shift intrinsics
9669 case Intrinsic::x86_sse2_psll_w:
9670 case Intrinsic::x86_sse2_psll_d:
9671 case Intrinsic::x86_sse2_psll_q:
9672 case Intrinsic::x86_avx2_psll_w:
9673 case Intrinsic::x86_avx2_psll_d:
9674 case Intrinsic::x86_avx2_psll_q:
9675 return DAG.getNode(X86ISD::VSHL, dl, Op.getValueType(),
9676 Op.getOperand(1), Op.getOperand(2));
9677 case Intrinsic::x86_sse2_psrl_w:
9678 case Intrinsic::x86_sse2_psrl_d:
9679 case Intrinsic::x86_sse2_psrl_q:
9680 case Intrinsic::x86_avx2_psrl_w:
9681 case Intrinsic::x86_avx2_psrl_d:
9682 case Intrinsic::x86_avx2_psrl_q:
9683 return DAG.getNode(X86ISD::VSRL, dl, Op.getValueType(),
9684 Op.getOperand(1), Op.getOperand(2));
9685 case Intrinsic::x86_sse2_psra_w:
9686 case Intrinsic::x86_sse2_psra_d:
9687 case Intrinsic::x86_avx2_psra_w:
9688 case Intrinsic::x86_avx2_psra_d:
9689 return DAG.getNode(X86ISD::VSRA, dl, Op.getValueType(),
9690 Op.getOperand(1), Op.getOperand(2));
9691 case Intrinsic::x86_sse2_pslli_w:
9692 case Intrinsic::x86_sse2_pslli_d:
9693 case Intrinsic::x86_sse2_pslli_q:
9694 case Intrinsic::x86_avx2_pslli_w:
9695 case Intrinsic::x86_avx2_pslli_d:
9696 case Intrinsic::x86_avx2_pslli_q:
9697 return getTargetVShiftNode(X86ISD::VSHLI, dl, Op.getValueType(),
9698 Op.getOperand(1), Op.getOperand(2), DAG);
9699 case Intrinsic::x86_sse2_psrli_w:
9700 case Intrinsic::x86_sse2_psrli_d:
9701 case Intrinsic::x86_sse2_psrli_q:
9702 case Intrinsic::x86_avx2_psrli_w:
9703 case Intrinsic::x86_avx2_psrli_d:
9704 case Intrinsic::x86_avx2_psrli_q:
9705 return getTargetVShiftNode(X86ISD::VSRLI, dl, Op.getValueType(),
9706 Op.getOperand(1), Op.getOperand(2), DAG);
9707 case Intrinsic::x86_sse2_psrai_w:
9708 case Intrinsic::x86_sse2_psrai_d:
9709 case Intrinsic::x86_avx2_psrai_w:
9710 case Intrinsic::x86_avx2_psrai_d:
9711 return getTargetVShiftNode(X86ISD::VSRAI, dl, Op.getValueType(),
9712 Op.getOperand(1), Op.getOperand(2), DAG);
9713 // Fix vector shift instructions where the last operand is a non-immediate
9715 case Intrinsic::x86_mmx_pslli_w:
9716 case Intrinsic::x86_mmx_pslli_d:
9717 case Intrinsic::x86_mmx_pslli_q:
9718 case Intrinsic::x86_mmx_psrli_w:
9719 case Intrinsic::x86_mmx_psrli_d:
9720 case Intrinsic::x86_mmx_psrli_q:
9721 case Intrinsic::x86_mmx_psrai_w:
9722 case Intrinsic::x86_mmx_psrai_d: {
9723 SDValue ShAmt = Op.getOperand(2);
9724 if (isa<ConstantSDNode>(ShAmt))
9727 unsigned NewIntNo = 0;
9729 case Intrinsic::x86_mmx_pslli_w:
9730 NewIntNo = Intrinsic::x86_mmx_psll_w;
9732 case Intrinsic::x86_mmx_pslli_d:
9733 NewIntNo = Intrinsic::x86_mmx_psll_d;
9735 case Intrinsic::x86_mmx_pslli_q:
9736 NewIntNo = Intrinsic::x86_mmx_psll_q;
9738 case Intrinsic::x86_mmx_psrli_w:
9739 NewIntNo = Intrinsic::x86_mmx_psrl_w;
9741 case Intrinsic::x86_mmx_psrli_d:
9742 NewIntNo = Intrinsic::x86_mmx_psrl_d;
9744 case Intrinsic::x86_mmx_psrli_q:
9745 NewIntNo = Intrinsic::x86_mmx_psrl_q;
9747 case Intrinsic::x86_mmx_psrai_w:
9748 NewIntNo = Intrinsic::x86_mmx_psra_w;
9750 case Intrinsic::x86_mmx_psrai_d:
9751 NewIntNo = Intrinsic::x86_mmx_psra_d;
9753 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
9756 // The vector shift intrinsics with scalars uses 32b shift amounts but
9757 // the sse2/mmx shift instructions reads 64 bits. Set the upper 32 bits
9759 ShAmt = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v2i32, ShAmt,
9760 DAG.getConstant(0, MVT::i32));
9761 // FIXME this must be lowered to get rid of the invalid type.
9763 EVT VT = Op.getValueType();
9764 ShAmt = DAG.getNode(ISD::BITCAST, dl, VT, ShAmt);
9765 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
9766 DAG.getConstant(NewIntNo, MVT::i32),
9767 Op.getOperand(1), ShAmt);
9772 SDValue X86TargetLowering::LowerRETURNADDR(SDValue Op,
9773 SelectionDAG &DAG) const {
9774 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
9775 MFI->setReturnAddressIsTaken(true);
9777 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
9778 DebugLoc dl = Op.getDebugLoc();
9781 SDValue FrameAddr = LowerFRAMEADDR(Op, DAG);
9783 DAG.getConstant(TD->getPointerSize(),
9784 Subtarget->is64Bit() ? MVT::i64 : MVT::i32);
9785 return DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
9786 DAG.getNode(ISD::ADD, dl, getPointerTy(),
9788 MachinePointerInfo(), false, false, false, 0);
9791 // Just load the return address.
9792 SDValue RetAddrFI = getReturnAddressFrameIndex(DAG);
9793 return DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
9794 RetAddrFI, MachinePointerInfo(), false, false, false, 0);
9797 SDValue X86TargetLowering::LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const {
9798 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
9799 MFI->setFrameAddressIsTaken(true);
9801 EVT VT = Op.getValueType();
9802 DebugLoc dl = Op.getDebugLoc(); // FIXME probably not meaningful
9803 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
9804 unsigned FrameReg = Subtarget->is64Bit() ? X86::RBP : X86::EBP;
9805 SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, FrameReg, VT);
9807 FrameAddr = DAG.getLoad(VT, dl, DAG.getEntryNode(), FrameAddr,
9808 MachinePointerInfo(),
9809 false, false, false, 0);
9813 SDValue X86TargetLowering::LowerFRAME_TO_ARGS_OFFSET(SDValue Op,
9814 SelectionDAG &DAG) const {
9815 return DAG.getIntPtrConstant(2*TD->getPointerSize());
9818 SDValue X86TargetLowering::LowerEH_RETURN(SDValue Op, SelectionDAG &DAG) const {
9819 MachineFunction &MF = DAG.getMachineFunction();
9820 SDValue Chain = Op.getOperand(0);
9821 SDValue Offset = Op.getOperand(1);
9822 SDValue Handler = Op.getOperand(2);
9823 DebugLoc dl = Op.getDebugLoc();
9825 SDValue Frame = DAG.getCopyFromReg(DAG.getEntryNode(), dl,
9826 Subtarget->is64Bit() ? X86::RBP : X86::EBP,
9828 unsigned StoreAddrReg = (Subtarget->is64Bit() ? X86::RCX : X86::ECX);
9830 SDValue StoreAddr = DAG.getNode(ISD::ADD, dl, getPointerTy(), Frame,
9831 DAG.getIntPtrConstant(TD->getPointerSize()));
9832 StoreAddr = DAG.getNode(ISD::ADD, dl, getPointerTy(), StoreAddr, Offset);
9833 Chain = DAG.getStore(Chain, dl, Handler, StoreAddr, MachinePointerInfo(),
9835 Chain = DAG.getCopyToReg(Chain, dl, StoreAddrReg, StoreAddr);
9836 MF.getRegInfo().addLiveOut(StoreAddrReg);
9838 return DAG.getNode(X86ISD::EH_RETURN, dl,
9840 Chain, DAG.getRegister(StoreAddrReg, getPointerTy()));
9843 SDValue X86TargetLowering::LowerADJUST_TRAMPOLINE(SDValue Op,
9844 SelectionDAG &DAG) const {
9845 return Op.getOperand(0);
9848 SDValue X86TargetLowering::LowerINIT_TRAMPOLINE(SDValue Op,
9849 SelectionDAG &DAG) const {
9850 SDValue Root = Op.getOperand(0);
9851 SDValue Trmp = Op.getOperand(1); // trampoline
9852 SDValue FPtr = Op.getOperand(2); // nested function
9853 SDValue Nest = Op.getOperand(3); // 'nest' parameter value
9854 DebugLoc dl = Op.getDebugLoc();
9856 const Value *TrmpAddr = cast<SrcValueSDNode>(Op.getOperand(4))->getValue();
9858 if (Subtarget->is64Bit()) {
9859 SDValue OutChains[6];
9861 // Large code-model.
9862 const unsigned char JMP64r = 0xFF; // 64-bit jmp through register opcode.
9863 const unsigned char MOV64ri = 0xB8; // X86::MOV64ri opcode.
9865 const unsigned char N86R10 = X86_MC::getX86RegNum(X86::R10);
9866 const unsigned char N86R11 = X86_MC::getX86RegNum(X86::R11);
9868 const unsigned char REX_WB = 0x40 | 0x08 | 0x01; // REX prefix
9870 // Load the pointer to the nested function into R11.
9871 unsigned OpCode = ((MOV64ri | N86R11) << 8) | REX_WB; // movabsq r11
9872 SDValue Addr = Trmp;
9873 OutChains[0] = DAG.getStore(Root, dl, DAG.getConstant(OpCode, MVT::i16),
9874 Addr, MachinePointerInfo(TrmpAddr),
9877 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
9878 DAG.getConstant(2, MVT::i64));
9879 OutChains[1] = DAG.getStore(Root, dl, FPtr, Addr,
9880 MachinePointerInfo(TrmpAddr, 2),
9883 // Load the 'nest' parameter value into R10.
9884 // R10 is specified in X86CallingConv.td
9885 OpCode = ((MOV64ri | N86R10) << 8) | REX_WB; // movabsq r10
9886 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
9887 DAG.getConstant(10, MVT::i64));
9888 OutChains[2] = DAG.getStore(Root, dl, DAG.getConstant(OpCode, MVT::i16),
9889 Addr, MachinePointerInfo(TrmpAddr, 10),
9892 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
9893 DAG.getConstant(12, MVT::i64));
9894 OutChains[3] = DAG.getStore(Root, dl, Nest, Addr,
9895 MachinePointerInfo(TrmpAddr, 12),
9898 // Jump to the nested function.
9899 OpCode = (JMP64r << 8) | REX_WB; // jmpq *...
9900 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
9901 DAG.getConstant(20, MVT::i64));
9902 OutChains[4] = DAG.getStore(Root, dl, DAG.getConstant(OpCode, MVT::i16),
9903 Addr, MachinePointerInfo(TrmpAddr, 20),
9906 unsigned char ModRM = N86R11 | (4 << 3) | (3 << 6); // ...r11
9907 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
9908 DAG.getConstant(22, MVT::i64));
9909 OutChains[5] = DAG.getStore(Root, dl, DAG.getConstant(ModRM, MVT::i8), Addr,
9910 MachinePointerInfo(TrmpAddr, 22),
9913 return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, OutChains, 6);
9915 const Function *Func =
9916 cast<Function>(cast<SrcValueSDNode>(Op.getOperand(5))->getValue());
9917 CallingConv::ID CC = Func->getCallingConv();
9922 llvm_unreachable("Unsupported calling convention");
9923 case CallingConv::C:
9924 case CallingConv::X86_StdCall: {
9925 // Pass 'nest' parameter in ECX.
9926 // Must be kept in sync with X86CallingConv.td
9929 // Check that ECX wasn't needed by an 'inreg' parameter.
9930 FunctionType *FTy = Func->getFunctionType();
9931 const AttrListPtr &Attrs = Func->getAttributes();
9933 if (!Attrs.isEmpty() && !Func->isVarArg()) {
9934 unsigned InRegCount = 0;
9937 for (FunctionType::param_iterator I = FTy->param_begin(),
9938 E = FTy->param_end(); I != E; ++I, ++Idx)
9939 if (Attrs.paramHasAttr(Idx, Attribute::InReg))
9940 // FIXME: should only count parameters that are lowered to integers.
9941 InRegCount += (TD->getTypeSizeInBits(*I) + 31) / 32;
9943 if (InRegCount > 2) {
9944 report_fatal_error("Nest register in use - reduce number of inreg"
9950 case CallingConv::X86_FastCall:
9951 case CallingConv::X86_ThisCall:
9952 case CallingConv::Fast:
9953 // Pass 'nest' parameter in EAX.
9954 // Must be kept in sync with X86CallingConv.td
9959 SDValue OutChains[4];
9962 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
9963 DAG.getConstant(10, MVT::i32));
9964 Disp = DAG.getNode(ISD::SUB, dl, MVT::i32, FPtr, Addr);
9966 // This is storing the opcode for MOV32ri.
9967 const unsigned char MOV32ri = 0xB8; // X86::MOV32ri's opcode byte.
9968 const unsigned char N86Reg = X86_MC::getX86RegNum(NestReg);
9969 OutChains[0] = DAG.getStore(Root, dl,
9970 DAG.getConstant(MOV32ri|N86Reg, MVT::i8),
9971 Trmp, MachinePointerInfo(TrmpAddr),
9974 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
9975 DAG.getConstant(1, MVT::i32));
9976 OutChains[1] = DAG.getStore(Root, dl, Nest, Addr,
9977 MachinePointerInfo(TrmpAddr, 1),
9980 const unsigned char JMP = 0xE9; // jmp <32bit dst> opcode.
9981 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
9982 DAG.getConstant(5, MVT::i32));
9983 OutChains[2] = DAG.getStore(Root, dl, DAG.getConstant(JMP, MVT::i8), Addr,
9984 MachinePointerInfo(TrmpAddr, 5),
9987 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
9988 DAG.getConstant(6, MVT::i32));
9989 OutChains[3] = DAG.getStore(Root, dl, Disp, Addr,
9990 MachinePointerInfo(TrmpAddr, 6),
9993 return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, OutChains, 4);
9997 SDValue X86TargetLowering::LowerFLT_ROUNDS_(SDValue Op,
9998 SelectionDAG &DAG) const {
10000 The rounding mode is in bits 11:10 of FPSR, and has the following
10002 00 Round to nearest
10007 FLT_ROUNDS, on the other hand, expects the following:
10014 To perform the conversion, we do:
10015 (((((FPSR & 0x800) >> 11) | ((FPSR & 0x400) >> 9)) + 1) & 3)
10018 MachineFunction &MF = DAG.getMachineFunction();
10019 const TargetMachine &TM = MF.getTarget();
10020 const TargetFrameLowering &TFI = *TM.getFrameLowering();
10021 unsigned StackAlignment = TFI.getStackAlignment();
10022 EVT VT = Op.getValueType();
10023 DebugLoc DL = Op.getDebugLoc();
10025 // Save FP Control Word to stack slot
10026 int SSFI = MF.getFrameInfo()->CreateStackObject(2, StackAlignment, false);
10027 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
10030 MachineMemOperand *MMO =
10031 MF.getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
10032 MachineMemOperand::MOStore, 2, 2);
10034 SDValue Ops[] = { DAG.getEntryNode(), StackSlot };
10035 SDValue Chain = DAG.getMemIntrinsicNode(X86ISD::FNSTCW16m, DL,
10036 DAG.getVTList(MVT::Other),
10037 Ops, 2, MVT::i16, MMO);
10039 // Load FP Control Word from stack slot
10040 SDValue CWD = DAG.getLoad(MVT::i16, DL, Chain, StackSlot,
10041 MachinePointerInfo(), false, false, false, 0);
10043 // Transform as necessary
10045 DAG.getNode(ISD::SRL, DL, MVT::i16,
10046 DAG.getNode(ISD::AND, DL, MVT::i16,
10047 CWD, DAG.getConstant(0x800, MVT::i16)),
10048 DAG.getConstant(11, MVT::i8));
10050 DAG.getNode(ISD::SRL, DL, MVT::i16,
10051 DAG.getNode(ISD::AND, DL, MVT::i16,
10052 CWD, DAG.getConstant(0x400, MVT::i16)),
10053 DAG.getConstant(9, MVT::i8));
10056 DAG.getNode(ISD::AND, DL, MVT::i16,
10057 DAG.getNode(ISD::ADD, DL, MVT::i16,
10058 DAG.getNode(ISD::OR, DL, MVT::i16, CWD1, CWD2),
10059 DAG.getConstant(1, MVT::i16)),
10060 DAG.getConstant(3, MVT::i16));
10063 return DAG.getNode((VT.getSizeInBits() < 16 ?
10064 ISD::TRUNCATE : ISD::ZERO_EXTEND), DL, VT, RetVal);
10067 SDValue X86TargetLowering::LowerCTLZ(SDValue Op, SelectionDAG &DAG) const {
10068 EVT VT = Op.getValueType();
10070 unsigned NumBits = VT.getSizeInBits();
10071 DebugLoc dl = Op.getDebugLoc();
10073 Op = Op.getOperand(0);
10074 if (VT == MVT::i8) {
10075 // Zero extend to i32 since there is not an i8 bsr.
10077 Op = DAG.getNode(ISD::ZERO_EXTEND, dl, OpVT, Op);
10080 // Issue a bsr (scan bits in reverse) which also sets EFLAGS.
10081 SDVTList VTs = DAG.getVTList(OpVT, MVT::i32);
10082 Op = DAG.getNode(X86ISD::BSR, dl, VTs, Op);
10084 // If src is zero (i.e. bsr sets ZF), returns NumBits.
10087 DAG.getConstant(NumBits+NumBits-1, OpVT),
10088 DAG.getConstant(X86::COND_E, MVT::i8),
10091 Op = DAG.getNode(X86ISD::CMOV, dl, OpVT, Ops, array_lengthof(Ops));
10093 // Finally xor with NumBits-1.
10094 Op = DAG.getNode(ISD::XOR, dl, OpVT, Op, DAG.getConstant(NumBits-1, OpVT));
10097 Op = DAG.getNode(ISD::TRUNCATE, dl, MVT::i8, Op);
10101 SDValue X86TargetLowering::LowerCTLZ_ZERO_UNDEF(SDValue Op,
10102 SelectionDAG &DAG) const {
10103 EVT VT = Op.getValueType();
10105 unsigned NumBits = VT.getSizeInBits();
10106 DebugLoc dl = Op.getDebugLoc();
10108 Op = Op.getOperand(0);
10109 if (VT == MVT::i8) {
10110 // Zero extend to i32 since there is not an i8 bsr.
10112 Op = DAG.getNode(ISD::ZERO_EXTEND, dl, OpVT, Op);
10115 // Issue a bsr (scan bits in reverse).
10116 SDVTList VTs = DAG.getVTList(OpVT, MVT::i32);
10117 Op = DAG.getNode(X86ISD::BSR, dl, VTs, Op);
10119 // And xor with NumBits-1.
10120 Op = DAG.getNode(ISD::XOR, dl, OpVT, Op, DAG.getConstant(NumBits-1, OpVT));
10123 Op = DAG.getNode(ISD::TRUNCATE, dl, MVT::i8, Op);
10127 SDValue X86TargetLowering::LowerCTTZ(SDValue Op, SelectionDAG &DAG) const {
10128 EVT VT = Op.getValueType();
10129 unsigned NumBits = VT.getSizeInBits();
10130 DebugLoc dl = Op.getDebugLoc();
10131 Op = Op.getOperand(0);
10133 // Issue a bsf (scan bits forward) which also sets EFLAGS.
10134 SDVTList VTs = DAG.getVTList(VT, MVT::i32);
10135 Op = DAG.getNode(X86ISD::BSF, dl, VTs, Op);
10137 // If src is zero (i.e. bsf sets ZF), returns NumBits.
10140 DAG.getConstant(NumBits, VT),
10141 DAG.getConstant(X86::COND_E, MVT::i8),
10144 return DAG.getNode(X86ISD::CMOV, dl, VT, Ops, array_lengthof(Ops));
10147 // Lower256IntArith - Break a 256-bit integer operation into two new 128-bit
10148 // ones, and then concatenate the result back.
10149 static SDValue Lower256IntArith(SDValue Op, SelectionDAG &DAG) {
10150 EVT VT = Op.getValueType();
10152 assert(VT.getSizeInBits() == 256 && VT.isInteger() &&
10153 "Unsupported value type for operation");
10155 int NumElems = VT.getVectorNumElements();
10156 DebugLoc dl = Op.getDebugLoc();
10157 SDValue Idx0 = DAG.getConstant(0, MVT::i32);
10158 SDValue Idx1 = DAG.getConstant(NumElems/2, MVT::i32);
10160 // Extract the LHS vectors
10161 SDValue LHS = Op.getOperand(0);
10162 SDValue LHS1 = Extract128BitVector(LHS, Idx0, DAG, dl);
10163 SDValue LHS2 = Extract128BitVector(LHS, Idx1, DAG, dl);
10165 // Extract the RHS vectors
10166 SDValue RHS = Op.getOperand(1);
10167 SDValue RHS1 = Extract128BitVector(RHS, Idx0, DAG, dl);
10168 SDValue RHS2 = Extract128BitVector(RHS, Idx1, DAG, dl);
10170 MVT EltVT = VT.getVectorElementType().getSimpleVT();
10171 EVT NewVT = MVT::getVectorVT(EltVT, NumElems/2);
10173 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT,
10174 DAG.getNode(Op.getOpcode(), dl, NewVT, LHS1, RHS1),
10175 DAG.getNode(Op.getOpcode(), dl, NewVT, LHS2, RHS2));
10178 SDValue X86TargetLowering::LowerADD(SDValue Op, SelectionDAG &DAG) const {
10179 assert(Op.getValueType().getSizeInBits() == 256 &&
10180 Op.getValueType().isInteger() &&
10181 "Only handle AVX 256-bit vector integer operation");
10182 return Lower256IntArith(Op, DAG);
10185 SDValue X86TargetLowering::LowerSUB(SDValue Op, SelectionDAG &DAG) const {
10186 assert(Op.getValueType().getSizeInBits() == 256 &&
10187 Op.getValueType().isInteger() &&
10188 "Only handle AVX 256-bit vector integer operation");
10189 return Lower256IntArith(Op, DAG);
10192 SDValue X86TargetLowering::LowerMUL(SDValue Op, SelectionDAG &DAG) const {
10193 EVT VT = Op.getValueType();
10195 // Decompose 256-bit ops into smaller 128-bit ops.
10196 if (VT.getSizeInBits() == 256 && !Subtarget->hasAVX2())
10197 return Lower256IntArith(Op, DAG);
10199 assert((VT == MVT::v2i64 || VT == MVT::v4i64) &&
10200 "Only know how to lower V2I64/V4I64 multiply");
10202 DebugLoc dl = Op.getDebugLoc();
10204 // Ahi = psrlqi(a, 32);
10205 // Bhi = psrlqi(b, 32);
10207 // AloBlo = pmuludq(a, b);
10208 // AloBhi = pmuludq(a, Bhi);
10209 // AhiBlo = pmuludq(Ahi, b);
10211 // AloBhi = psllqi(AloBhi, 32);
10212 // AhiBlo = psllqi(AhiBlo, 32);
10213 // return AloBlo + AloBhi + AhiBlo;
10215 SDValue A = Op.getOperand(0);
10216 SDValue B = Op.getOperand(1);
10218 SDValue ShAmt = DAG.getConstant(32, MVT::i32);
10220 SDValue Ahi = DAG.getNode(X86ISD::VSRLI, dl, VT, A, ShAmt);
10221 SDValue Bhi = DAG.getNode(X86ISD::VSRLI, dl, VT, B, ShAmt);
10223 // Bit cast to 32-bit vectors for MULUDQ
10224 EVT MulVT = (VT == MVT::v2i64) ? MVT::v4i32 : MVT::v8i32;
10225 A = DAG.getNode(ISD::BITCAST, dl, MulVT, A);
10226 B = DAG.getNode(ISD::BITCAST, dl, MulVT, B);
10227 Ahi = DAG.getNode(ISD::BITCAST, dl, MulVT, Ahi);
10228 Bhi = DAG.getNode(ISD::BITCAST, dl, MulVT, Bhi);
10230 SDValue AloBlo = DAG.getNode(X86ISD::PMULUDQ, dl, VT, A, B);
10231 SDValue AloBhi = DAG.getNode(X86ISD::PMULUDQ, dl, VT, A, Bhi);
10232 SDValue AhiBlo = DAG.getNode(X86ISD::PMULUDQ, dl, VT, Ahi, B);
10234 AloBhi = DAG.getNode(X86ISD::VSHLI, dl, VT, AloBhi, ShAmt);
10235 AhiBlo = DAG.getNode(X86ISD::VSHLI, dl, VT, AhiBlo, ShAmt);
10237 SDValue Res = DAG.getNode(ISD::ADD, dl, VT, AloBlo, AloBhi);
10238 return DAG.getNode(ISD::ADD, dl, VT, Res, AhiBlo);
10241 SDValue X86TargetLowering::LowerShift(SDValue Op, SelectionDAG &DAG) const {
10243 EVT VT = Op.getValueType();
10244 DebugLoc dl = Op.getDebugLoc();
10245 SDValue R = Op.getOperand(0);
10246 SDValue Amt = Op.getOperand(1);
10247 LLVMContext *Context = DAG.getContext();
10249 if (!Subtarget->hasSSE2())
10252 // Optimize shl/srl/sra with constant shift amount.
10253 if (isSplatVector(Amt.getNode())) {
10254 SDValue SclrAmt = Amt->getOperand(0);
10255 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(SclrAmt)) {
10256 uint64_t ShiftAmt = C->getZExtValue();
10258 if (VT == MVT::v2i64 || VT == MVT::v4i32 || VT == MVT::v8i16 ||
10259 (Subtarget->hasAVX2() &&
10260 (VT == MVT::v4i64 || VT == MVT::v8i32 || VT == MVT::v16i16))) {
10261 if (Op.getOpcode() == ISD::SHL)
10262 return DAG.getNode(X86ISD::VSHLI, dl, VT, R,
10263 DAG.getConstant(ShiftAmt, MVT::i32));
10264 if (Op.getOpcode() == ISD::SRL)
10265 return DAG.getNode(X86ISD::VSRLI, dl, VT, R,
10266 DAG.getConstant(ShiftAmt, MVT::i32));
10267 if (Op.getOpcode() == ISD::SRA && VT != MVT::v2i64 && VT != MVT::v4i64)
10268 return DAG.getNode(X86ISD::VSRAI, dl, VT, R,
10269 DAG.getConstant(ShiftAmt, MVT::i32));
10272 if (VT == MVT::v16i8) {
10273 if (Op.getOpcode() == ISD::SHL) {
10274 // Make a large shift.
10275 SDValue SHL = DAG.getNode(X86ISD::VSHLI, dl, MVT::v8i16, R,
10276 DAG.getConstant(ShiftAmt, MVT::i32));
10277 SHL = DAG.getNode(ISD::BITCAST, dl, VT, SHL);
10278 // Zero out the rightmost bits.
10279 SmallVector<SDValue, 16> V(16,
10280 DAG.getConstant(uint8_t(-1U << ShiftAmt),
10282 return DAG.getNode(ISD::AND, dl, VT, SHL,
10283 DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &V[0], 16));
10285 if (Op.getOpcode() == ISD::SRL) {
10286 // Make a large shift.
10287 SDValue SRL = DAG.getNode(X86ISD::VSRLI, dl, MVT::v8i16, R,
10288 DAG.getConstant(ShiftAmt, MVT::i32));
10289 SRL = DAG.getNode(ISD::BITCAST, dl, VT, SRL);
10290 // Zero out the leftmost bits.
10291 SmallVector<SDValue, 16> V(16,
10292 DAG.getConstant(uint8_t(-1U) >> ShiftAmt,
10294 return DAG.getNode(ISD::AND, dl, VT, SRL,
10295 DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &V[0], 16));
10297 if (Op.getOpcode() == ISD::SRA) {
10298 if (ShiftAmt == 7) {
10299 // R s>> 7 === R s< 0
10300 SDValue Zeros = getZeroVector(VT, Subtarget, DAG, dl);
10301 return DAG.getNode(X86ISD::PCMPGT, dl, VT, Zeros, R);
10304 // R s>> a === ((R u>> a) ^ m) - m
10305 SDValue Res = DAG.getNode(ISD::SRL, dl, VT, R, Amt);
10306 SmallVector<SDValue, 16> V(16, DAG.getConstant(128 >> ShiftAmt,
10308 SDValue Mask = DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &V[0], 16);
10309 Res = DAG.getNode(ISD::XOR, dl, VT, Res, Mask);
10310 Res = DAG.getNode(ISD::SUB, dl, VT, Res, Mask);
10315 if (Subtarget->hasAVX2() && VT == MVT::v32i8) {
10316 if (Op.getOpcode() == ISD::SHL) {
10317 // Make a large shift.
10318 SDValue SHL = DAG.getNode(X86ISD::VSHLI, dl, MVT::v16i16, R,
10319 DAG.getConstant(ShiftAmt, MVT::i32));
10320 SHL = DAG.getNode(ISD::BITCAST, dl, VT, SHL);
10321 // Zero out the rightmost bits.
10322 SmallVector<SDValue, 32> V(32,
10323 DAG.getConstant(uint8_t(-1U << ShiftAmt),
10325 return DAG.getNode(ISD::AND, dl, VT, SHL,
10326 DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &V[0], 32));
10328 if (Op.getOpcode() == ISD::SRL) {
10329 // Make a large shift.
10330 SDValue SRL = DAG.getNode(X86ISD::VSRLI, dl, MVT::v16i16, R,
10331 DAG.getConstant(ShiftAmt, MVT::i32));
10332 SRL = DAG.getNode(ISD::BITCAST, dl, VT, SRL);
10333 // Zero out the leftmost bits.
10334 SmallVector<SDValue, 32> V(32,
10335 DAG.getConstant(uint8_t(-1U) >> ShiftAmt,
10337 return DAG.getNode(ISD::AND, dl, VT, SRL,
10338 DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &V[0], 32));
10340 if (Op.getOpcode() == ISD::SRA) {
10341 if (ShiftAmt == 7) {
10342 // R s>> 7 === R s< 0
10343 SDValue Zeros = getZeroVector(VT, Subtarget, DAG, dl);
10344 return DAG.getNode(X86ISD::PCMPGT, dl, VT, Zeros, R);
10347 // R s>> a === ((R u>> a) ^ m) - m
10348 SDValue Res = DAG.getNode(ISD::SRL, dl, VT, R, Amt);
10349 SmallVector<SDValue, 32> V(32, DAG.getConstant(128 >> ShiftAmt,
10351 SDValue Mask = DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &V[0], 32);
10352 Res = DAG.getNode(ISD::XOR, dl, VT, Res, Mask);
10353 Res = DAG.getNode(ISD::SUB, dl, VT, Res, Mask);
10360 // Lower SHL with variable shift amount.
10361 if (VT == MVT::v4i32 && Op->getOpcode() == ISD::SHL) {
10362 Op = DAG.getNode(X86ISD::VSHLI, dl, VT, Op.getOperand(1),
10363 DAG.getConstant(23, MVT::i32));
10365 const uint32_t CV[] = { 0x3f800000U, 0x3f800000U, 0x3f800000U, 0x3f800000U};
10366 Constant *C = ConstantDataVector::get(*Context, CV);
10367 SDValue CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
10368 SDValue Addend = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
10369 MachinePointerInfo::getConstantPool(),
10370 false, false, false, 16);
10372 Op = DAG.getNode(ISD::ADD, dl, VT, Op, Addend);
10373 Op = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, Op);
10374 Op = DAG.getNode(ISD::FP_TO_SINT, dl, VT, Op);
10375 return DAG.getNode(ISD::MUL, dl, VT, Op, R);
10377 if (VT == MVT::v16i8 && Op->getOpcode() == ISD::SHL) {
10378 assert(Subtarget->hasSSE2() && "Need SSE2 for pslli/pcmpeq.");
10381 Op = DAG.getNode(X86ISD::VSHLI, dl, MVT::v8i16, Op.getOperand(1),
10382 DAG.getConstant(5, MVT::i32));
10383 Op = DAG.getNode(ISD::BITCAST, dl, VT, Op);
10385 // Turn 'a' into a mask suitable for VSELECT
10386 SDValue VSelM = DAG.getConstant(0x80, VT);
10387 SDValue OpVSel = DAG.getNode(ISD::AND, dl, VT, VSelM, Op);
10388 OpVSel = DAG.getNode(X86ISD::PCMPEQ, dl, VT, OpVSel, VSelM);
10390 SDValue CM1 = DAG.getConstant(0x0f, VT);
10391 SDValue CM2 = DAG.getConstant(0x3f, VT);
10393 // r = VSELECT(r, psllw(r & (char16)15, 4), a);
10394 SDValue M = DAG.getNode(ISD::AND, dl, VT, R, CM1);
10395 M = getTargetVShiftNode(X86ISD::VSHLI, dl, MVT::v8i16, M,
10396 DAG.getConstant(4, MVT::i32), DAG);
10397 M = DAG.getNode(ISD::BITCAST, dl, VT, M);
10398 R = DAG.getNode(ISD::VSELECT, dl, VT, OpVSel, M, R);
10401 Op = DAG.getNode(ISD::ADD, dl, VT, Op, Op);
10402 OpVSel = DAG.getNode(ISD::AND, dl, VT, VSelM, Op);
10403 OpVSel = DAG.getNode(X86ISD::PCMPEQ, dl, VT, OpVSel, VSelM);
10405 // r = VSELECT(r, psllw(r & (char16)63, 2), a);
10406 M = DAG.getNode(ISD::AND, dl, VT, R, CM2);
10407 M = getTargetVShiftNode(X86ISD::VSHLI, dl, MVT::v8i16, M,
10408 DAG.getConstant(2, MVT::i32), DAG);
10409 M = DAG.getNode(ISD::BITCAST, dl, VT, M);
10410 R = DAG.getNode(ISD::VSELECT, dl, VT, OpVSel, M, R);
10413 Op = DAG.getNode(ISD::ADD, dl, VT, Op, Op);
10414 OpVSel = DAG.getNode(ISD::AND, dl, VT, VSelM, Op);
10415 OpVSel = DAG.getNode(X86ISD::PCMPEQ, dl, VT, OpVSel, VSelM);
10417 // return VSELECT(r, r+r, a);
10418 R = DAG.getNode(ISD::VSELECT, dl, VT, OpVSel,
10419 DAG.getNode(ISD::ADD, dl, VT, R, R), R);
10423 // Decompose 256-bit shifts into smaller 128-bit shifts.
10424 if (VT.getSizeInBits() == 256) {
10425 unsigned NumElems = VT.getVectorNumElements();
10426 MVT EltVT = VT.getVectorElementType().getSimpleVT();
10427 EVT NewVT = MVT::getVectorVT(EltVT, NumElems/2);
10429 // Extract the two vectors
10430 SDValue V1 = Extract128BitVector(R, DAG.getConstant(0, MVT::i32), DAG, dl);
10431 SDValue V2 = Extract128BitVector(R, DAG.getConstant(NumElems/2, MVT::i32),
10434 // Recreate the shift amount vectors
10435 SDValue Amt1, Amt2;
10436 if (Amt.getOpcode() == ISD::BUILD_VECTOR) {
10437 // Constant shift amount
10438 SmallVector<SDValue, 4> Amt1Csts;
10439 SmallVector<SDValue, 4> Amt2Csts;
10440 for (unsigned i = 0; i != NumElems/2; ++i)
10441 Amt1Csts.push_back(Amt->getOperand(i));
10442 for (unsigned i = NumElems/2; i != NumElems; ++i)
10443 Amt2Csts.push_back(Amt->getOperand(i));
10445 Amt1 = DAG.getNode(ISD::BUILD_VECTOR, dl, NewVT,
10446 &Amt1Csts[0], NumElems/2);
10447 Amt2 = DAG.getNode(ISD::BUILD_VECTOR, dl, NewVT,
10448 &Amt2Csts[0], NumElems/2);
10450 // Variable shift amount
10451 Amt1 = Extract128BitVector(Amt, DAG.getConstant(0, MVT::i32), DAG, dl);
10452 Amt2 = Extract128BitVector(Amt, DAG.getConstant(NumElems/2, MVT::i32),
10456 // Issue new vector shifts for the smaller types
10457 V1 = DAG.getNode(Op.getOpcode(), dl, NewVT, V1, Amt1);
10458 V2 = DAG.getNode(Op.getOpcode(), dl, NewVT, V2, Amt2);
10460 // Concatenate the result back
10461 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, V1, V2);
10467 SDValue X86TargetLowering::LowerXALUO(SDValue Op, SelectionDAG &DAG) const {
10468 // Lower the "add/sub/mul with overflow" instruction into a regular ins plus
10469 // a "setcc" instruction that checks the overflow flag. The "brcond" lowering
10470 // looks for this combo and may remove the "setcc" instruction if the "setcc"
10471 // has only one use.
10472 SDNode *N = Op.getNode();
10473 SDValue LHS = N->getOperand(0);
10474 SDValue RHS = N->getOperand(1);
10475 unsigned BaseOp = 0;
10477 DebugLoc DL = Op.getDebugLoc();
10478 switch (Op.getOpcode()) {
10479 default: llvm_unreachable("Unknown ovf instruction!");
10481 // A subtract of one will be selected as a INC. Note that INC doesn't
10482 // set CF, so we can't do this for UADDO.
10483 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(RHS))
10485 BaseOp = X86ISD::INC;
10486 Cond = X86::COND_O;
10489 BaseOp = X86ISD::ADD;
10490 Cond = X86::COND_O;
10493 BaseOp = X86ISD::ADD;
10494 Cond = X86::COND_B;
10497 // A subtract of one will be selected as a DEC. Note that DEC doesn't
10498 // set CF, so we can't do this for USUBO.
10499 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(RHS))
10501 BaseOp = X86ISD::DEC;
10502 Cond = X86::COND_O;
10505 BaseOp = X86ISD::SUB;
10506 Cond = X86::COND_O;
10509 BaseOp = X86ISD::SUB;
10510 Cond = X86::COND_B;
10513 BaseOp = X86ISD::SMUL;
10514 Cond = X86::COND_O;
10516 case ISD::UMULO: { // i64, i8 = umulo lhs, rhs --> i64, i64, i32 umul lhs,rhs
10517 SDVTList VTs = DAG.getVTList(N->getValueType(0), N->getValueType(0),
10519 SDValue Sum = DAG.getNode(X86ISD::UMUL, DL, VTs, LHS, RHS);
10522 DAG.getNode(X86ISD::SETCC, DL, MVT::i8,
10523 DAG.getConstant(X86::COND_O, MVT::i32),
10524 SDValue(Sum.getNode(), 2));
10526 return DAG.getNode(ISD::MERGE_VALUES, DL, N->getVTList(), Sum, SetCC);
10530 // Also sets EFLAGS.
10531 SDVTList VTs = DAG.getVTList(N->getValueType(0), MVT::i32);
10532 SDValue Sum = DAG.getNode(BaseOp, DL, VTs, LHS, RHS);
10535 DAG.getNode(X86ISD::SETCC, DL, N->getValueType(1),
10536 DAG.getConstant(Cond, MVT::i32),
10537 SDValue(Sum.getNode(), 1));
10539 return DAG.getNode(ISD::MERGE_VALUES, DL, N->getVTList(), Sum, SetCC);
10542 SDValue X86TargetLowering::LowerSIGN_EXTEND_INREG(SDValue Op,
10543 SelectionDAG &DAG) const {
10544 DebugLoc dl = Op.getDebugLoc();
10545 EVT ExtraVT = cast<VTSDNode>(Op.getOperand(1))->getVT();
10546 EVT VT = Op.getValueType();
10548 if (!Subtarget->hasSSE2() || !VT.isVector())
10551 unsigned BitsDiff = VT.getScalarType().getSizeInBits() -
10552 ExtraVT.getScalarType().getSizeInBits();
10553 SDValue ShAmt = DAG.getConstant(BitsDiff, MVT::i32);
10555 switch (VT.getSimpleVT().SimpleTy) {
10556 default: return SDValue();
10559 if (!Subtarget->hasAVX())
10561 if (!Subtarget->hasAVX2()) {
10562 // needs to be split
10563 int NumElems = VT.getVectorNumElements();
10564 SDValue Idx0 = DAG.getConstant(0, MVT::i32);
10565 SDValue Idx1 = DAG.getConstant(NumElems/2, MVT::i32);
10567 // Extract the LHS vectors
10568 SDValue LHS = Op.getOperand(0);
10569 SDValue LHS1 = Extract128BitVector(LHS, Idx0, DAG, dl);
10570 SDValue LHS2 = Extract128BitVector(LHS, Idx1, DAG, dl);
10572 MVT EltVT = VT.getVectorElementType().getSimpleVT();
10573 EVT NewVT = MVT::getVectorVT(EltVT, NumElems/2);
10575 EVT ExtraEltVT = ExtraVT.getVectorElementType();
10576 int ExtraNumElems = ExtraVT.getVectorNumElements();
10577 ExtraVT = EVT::getVectorVT(*DAG.getContext(), ExtraEltVT,
10579 SDValue Extra = DAG.getValueType(ExtraVT);
10581 LHS1 = DAG.getNode(Op.getOpcode(), dl, NewVT, LHS1, Extra);
10582 LHS2 = DAG.getNode(Op.getOpcode(), dl, NewVT, LHS2, Extra);
10584 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, LHS1, LHS2);;
10589 SDValue Tmp1 = getTargetVShiftNode(X86ISD::VSHLI, dl, VT,
10590 Op.getOperand(0), ShAmt, DAG);
10591 return getTargetVShiftNode(X86ISD::VSRAI, dl, VT, Tmp1, ShAmt, DAG);
10597 SDValue X86TargetLowering::LowerMEMBARRIER(SDValue Op, SelectionDAG &DAG) const{
10598 DebugLoc dl = Op.getDebugLoc();
10600 // Go ahead and emit the fence on x86-64 even if we asked for no-sse2.
10601 // There isn't any reason to disable it if the target processor supports it.
10602 if (!Subtarget->hasSSE2() && !Subtarget->is64Bit()) {
10603 SDValue Chain = Op.getOperand(0);
10604 SDValue Zero = DAG.getConstant(0, MVT::i32);
10606 DAG.getRegister(X86::ESP, MVT::i32), // Base
10607 DAG.getTargetConstant(1, MVT::i8), // Scale
10608 DAG.getRegister(0, MVT::i32), // Index
10609 DAG.getTargetConstant(0, MVT::i32), // Disp
10610 DAG.getRegister(0, MVT::i32), // Segment.
10615 DAG.getMachineNode(X86::OR32mrLocked, dl, MVT::Other, Ops,
10616 array_lengthof(Ops));
10617 return SDValue(Res, 0);
10620 unsigned isDev = cast<ConstantSDNode>(Op.getOperand(5))->getZExtValue();
10622 return DAG.getNode(X86ISD::MEMBARRIER, dl, MVT::Other, Op.getOperand(0));
10624 unsigned Op1 = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
10625 unsigned Op2 = cast<ConstantSDNode>(Op.getOperand(2))->getZExtValue();
10626 unsigned Op3 = cast<ConstantSDNode>(Op.getOperand(3))->getZExtValue();
10627 unsigned Op4 = cast<ConstantSDNode>(Op.getOperand(4))->getZExtValue();
10629 // def : Pat<(membarrier (i8 0), (i8 0), (i8 0), (i8 1), (i8 1)), (SFENCE)>;
10630 if (!Op1 && !Op2 && !Op3 && Op4)
10631 return DAG.getNode(X86ISD::SFENCE, dl, MVT::Other, Op.getOperand(0));
10633 // def : Pat<(membarrier (i8 1), (i8 0), (i8 0), (i8 0), (i8 1)), (LFENCE)>;
10634 if (Op1 && !Op2 && !Op3 && !Op4)
10635 return DAG.getNode(X86ISD::LFENCE, dl, MVT::Other, Op.getOperand(0));
10637 // def : Pat<(membarrier (i8 imm), (i8 imm), (i8 imm), (i8 imm), (i8 1)),
10639 return DAG.getNode(X86ISD::MFENCE, dl, MVT::Other, Op.getOperand(0));
10642 SDValue X86TargetLowering::LowerATOMIC_FENCE(SDValue Op,
10643 SelectionDAG &DAG) const {
10644 DebugLoc dl = Op.getDebugLoc();
10645 AtomicOrdering FenceOrdering = static_cast<AtomicOrdering>(
10646 cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue());
10647 SynchronizationScope FenceScope = static_cast<SynchronizationScope>(
10648 cast<ConstantSDNode>(Op.getOperand(2))->getZExtValue());
10650 // The only fence that needs an instruction is a sequentially-consistent
10651 // cross-thread fence.
10652 if (FenceOrdering == SequentiallyConsistent && FenceScope == CrossThread) {
10653 // Use mfence if we have SSE2 or we're on x86-64 (even if we asked for
10654 // no-sse2). There isn't any reason to disable it if the target processor
10656 if (Subtarget->hasSSE2() || Subtarget->is64Bit())
10657 return DAG.getNode(X86ISD::MFENCE, dl, MVT::Other, Op.getOperand(0));
10659 SDValue Chain = Op.getOperand(0);
10660 SDValue Zero = DAG.getConstant(0, MVT::i32);
10662 DAG.getRegister(X86::ESP, MVT::i32), // Base
10663 DAG.getTargetConstant(1, MVT::i8), // Scale
10664 DAG.getRegister(0, MVT::i32), // Index
10665 DAG.getTargetConstant(0, MVT::i32), // Disp
10666 DAG.getRegister(0, MVT::i32), // Segment.
10671 DAG.getMachineNode(X86::OR32mrLocked, dl, MVT::Other, Ops,
10672 array_lengthof(Ops));
10673 return SDValue(Res, 0);
10676 // MEMBARRIER is a compiler barrier; it codegens to a no-op.
10677 return DAG.getNode(X86ISD::MEMBARRIER, dl, MVT::Other, Op.getOperand(0));
10681 SDValue X86TargetLowering::LowerCMP_SWAP(SDValue Op, SelectionDAG &DAG) const {
10682 EVT T = Op.getValueType();
10683 DebugLoc DL = Op.getDebugLoc();
10686 switch(T.getSimpleVT().SimpleTy) {
10687 default: llvm_unreachable("Invalid value type!");
10688 case MVT::i8: Reg = X86::AL; size = 1; break;
10689 case MVT::i16: Reg = X86::AX; size = 2; break;
10690 case MVT::i32: Reg = X86::EAX; size = 4; break;
10692 assert(Subtarget->is64Bit() && "Node not type legal!");
10693 Reg = X86::RAX; size = 8;
10696 SDValue cpIn = DAG.getCopyToReg(Op.getOperand(0), DL, Reg,
10697 Op.getOperand(2), SDValue());
10698 SDValue Ops[] = { cpIn.getValue(0),
10701 DAG.getTargetConstant(size, MVT::i8),
10702 cpIn.getValue(1) };
10703 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Glue);
10704 MachineMemOperand *MMO = cast<AtomicSDNode>(Op)->getMemOperand();
10705 SDValue Result = DAG.getMemIntrinsicNode(X86ISD::LCMPXCHG_DAG, DL, Tys,
10708 DAG.getCopyFromReg(Result.getValue(0), DL, Reg, T, Result.getValue(1));
10712 SDValue X86TargetLowering::LowerREADCYCLECOUNTER(SDValue Op,
10713 SelectionDAG &DAG) const {
10714 assert(Subtarget->is64Bit() && "Result not type legalized?");
10715 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Glue);
10716 SDValue TheChain = Op.getOperand(0);
10717 DebugLoc dl = Op.getDebugLoc();
10718 SDValue rd = DAG.getNode(X86ISD::RDTSC_DAG, dl, Tys, &TheChain, 1);
10719 SDValue rax = DAG.getCopyFromReg(rd, dl, X86::RAX, MVT::i64, rd.getValue(1));
10720 SDValue rdx = DAG.getCopyFromReg(rax.getValue(1), dl, X86::RDX, MVT::i64,
10722 SDValue Tmp = DAG.getNode(ISD::SHL, dl, MVT::i64, rdx,
10723 DAG.getConstant(32, MVT::i8));
10725 DAG.getNode(ISD::OR, dl, MVT::i64, rax, Tmp),
10728 return DAG.getMergeValues(Ops, 2, dl);
10731 SDValue X86TargetLowering::LowerBITCAST(SDValue Op,
10732 SelectionDAG &DAG) const {
10733 EVT SrcVT = Op.getOperand(0).getValueType();
10734 EVT DstVT = Op.getValueType();
10735 assert(Subtarget->is64Bit() && !Subtarget->hasSSE2() &&
10736 Subtarget->hasMMX() && "Unexpected custom BITCAST");
10737 assert((DstVT == MVT::i64 ||
10738 (DstVT.isVector() && DstVT.getSizeInBits()==64)) &&
10739 "Unexpected custom BITCAST");
10740 // i64 <=> MMX conversions are Legal.
10741 if (SrcVT==MVT::i64 && DstVT.isVector())
10743 if (DstVT==MVT::i64 && SrcVT.isVector())
10745 // MMX <=> MMX conversions are Legal.
10746 if (SrcVT.isVector() && DstVT.isVector())
10748 // All other conversions need to be expanded.
10752 SDValue X86TargetLowering::LowerLOAD_SUB(SDValue Op, SelectionDAG &DAG) const {
10753 SDNode *Node = Op.getNode();
10754 DebugLoc dl = Node->getDebugLoc();
10755 EVT T = Node->getValueType(0);
10756 SDValue negOp = DAG.getNode(ISD::SUB, dl, T,
10757 DAG.getConstant(0, T), Node->getOperand(2));
10758 return DAG.getAtomic(ISD::ATOMIC_LOAD_ADD, dl,
10759 cast<AtomicSDNode>(Node)->getMemoryVT(),
10760 Node->getOperand(0),
10761 Node->getOperand(1), negOp,
10762 cast<AtomicSDNode>(Node)->getSrcValue(),
10763 cast<AtomicSDNode>(Node)->getAlignment(),
10764 cast<AtomicSDNode>(Node)->getOrdering(),
10765 cast<AtomicSDNode>(Node)->getSynchScope());
10768 static SDValue LowerATOMIC_STORE(SDValue Op, SelectionDAG &DAG) {
10769 SDNode *Node = Op.getNode();
10770 DebugLoc dl = Node->getDebugLoc();
10771 EVT VT = cast<AtomicSDNode>(Node)->getMemoryVT();
10773 // Convert seq_cst store -> xchg
10774 // Convert wide store -> swap (-> cmpxchg8b/cmpxchg16b)
10775 // FIXME: On 32-bit, store -> fist or movq would be more efficient
10776 // (The only way to get a 16-byte store is cmpxchg16b)
10777 // FIXME: 16-byte ATOMIC_SWAP isn't actually hooked up at the moment.
10778 if (cast<AtomicSDNode>(Node)->getOrdering() == SequentiallyConsistent ||
10779 !DAG.getTargetLoweringInfo().isTypeLegal(VT)) {
10780 SDValue Swap = DAG.getAtomic(ISD::ATOMIC_SWAP, dl,
10781 cast<AtomicSDNode>(Node)->getMemoryVT(),
10782 Node->getOperand(0),
10783 Node->getOperand(1), Node->getOperand(2),
10784 cast<AtomicSDNode>(Node)->getMemOperand(),
10785 cast<AtomicSDNode>(Node)->getOrdering(),
10786 cast<AtomicSDNode>(Node)->getSynchScope());
10787 return Swap.getValue(1);
10789 // Other atomic stores have a simple pattern.
10793 static SDValue LowerADDC_ADDE_SUBC_SUBE(SDValue Op, SelectionDAG &DAG) {
10794 EVT VT = Op.getNode()->getValueType(0);
10796 // Let legalize expand this if it isn't a legal type yet.
10797 if (!DAG.getTargetLoweringInfo().isTypeLegal(VT))
10800 SDVTList VTs = DAG.getVTList(VT, MVT::i32);
10803 bool ExtraOp = false;
10804 switch (Op.getOpcode()) {
10805 default: llvm_unreachable("Invalid code");
10806 case ISD::ADDC: Opc = X86ISD::ADD; break;
10807 case ISD::ADDE: Opc = X86ISD::ADC; ExtraOp = true; break;
10808 case ISD::SUBC: Opc = X86ISD::SUB; break;
10809 case ISD::SUBE: Opc = X86ISD::SBB; ExtraOp = true; break;
10813 return DAG.getNode(Opc, Op->getDebugLoc(), VTs, Op.getOperand(0),
10815 return DAG.getNode(Opc, Op->getDebugLoc(), VTs, Op.getOperand(0),
10816 Op.getOperand(1), Op.getOperand(2));
10819 /// LowerOperation - Provide custom lowering hooks for some operations.
10821 SDValue X86TargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const {
10822 switch (Op.getOpcode()) {
10823 default: llvm_unreachable("Should not custom lower this!");
10824 case ISD::SIGN_EXTEND_INREG: return LowerSIGN_EXTEND_INREG(Op,DAG);
10825 case ISD::MEMBARRIER: return LowerMEMBARRIER(Op,DAG);
10826 case ISD::ATOMIC_FENCE: return LowerATOMIC_FENCE(Op,DAG);
10827 case ISD::ATOMIC_CMP_SWAP: return LowerCMP_SWAP(Op,DAG);
10828 case ISD::ATOMIC_LOAD_SUB: return LowerLOAD_SUB(Op,DAG);
10829 case ISD::ATOMIC_STORE: return LowerATOMIC_STORE(Op,DAG);
10830 case ISD::BUILD_VECTOR: return LowerBUILD_VECTOR(Op, DAG);
10831 case ISD::CONCAT_VECTORS: return LowerCONCAT_VECTORS(Op, DAG);
10832 case ISD::VECTOR_SHUFFLE: return LowerVECTOR_SHUFFLE(Op, DAG);
10833 case ISD::EXTRACT_VECTOR_ELT: return LowerEXTRACT_VECTOR_ELT(Op, DAG);
10834 case ISD::INSERT_VECTOR_ELT: return LowerINSERT_VECTOR_ELT(Op, DAG);
10835 case ISD::EXTRACT_SUBVECTOR: return LowerEXTRACT_SUBVECTOR(Op, DAG);
10836 case ISD::INSERT_SUBVECTOR: return LowerINSERT_SUBVECTOR(Op, DAG);
10837 case ISD::SCALAR_TO_VECTOR: return LowerSCALAR_TO_VECTOR(Op, DAG);
10838 case ISD::ConstantPool: return LowerConstantPool(Op, DAG);
10839 case ISD::GlobalAddress: return LowerGlobalAddress(Op, DAG);
10840 case ISD::GlobalTLSAddress: return LowerGlobalTLSAddress(Op, DAG);
10841 case ISD::ExternalSymbol: return LowerExternalSymbol(Op, DAG);
10842 case ISD::BlockAddress: return LowerBlockAddress(Op, DAG);
10843 case ISD::SHL_PARTS:
10844 case ISD::SRA_PARTS:
10845 case ISD::SRL_PARTS: return LowerShiftParts(Op, DAG);
10846 case ISD::SINT_TO_FP: return LowerSINT_TO_FP(Op, DAG);
10847 case ISD::UINT_TO_FP: return LowerUINT_TO_FP(Op, DAG);
10848 case ISD::FP_TO_SINT: return LowerFP_TO_SINT(Op, DAG);
10849 case ISD::FP_TO_UINT: return LowerFP_TO_UINT(Op, DAG);
10850 case ISD::FABS: return LowerFABS(Op, DAG);
10851 case ISD::FNEG: return LowerFNEG(Op, DAG);
10852 case ISD::FCOPYSIGN: return LowerFCOPYSIGN(Op, DAG);
10853 case ISD::FGETSIGN: return LowerFGETSIGN(Op, DAG);
10854 case ISD::SETCC: return LowerSETCC(Op, DAG);
10855 case ISD::SELECT: return LowerSELECT(Op, DAG);
10856 case ISD::BRCOND: return LowerBRCOND(Op, DAG);
10857 case ISD::JumpTable: return LowerJumpTable(Op, DAG);
10858 case ISD::VASTART: return LowerVASTART(Op, DAG);
10859 case ISD::VAARG: return LowerVAARG(Op, DAG);
10860 case ISD::VACOPY: return LowerVACOPY(Op, DAG);
10861 case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG);
10862 case ISD::RETURNADDR: return LowerRETURNADDR(Op, DAG);
10863 case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
10864 case ISD::FRAME_TO_ARGS_OFFSET:
10865 return LowerFRAME_TO_ARGS_OFFSET(Op, DAG);
10866 case ISD::DYNAMIC_STACKALLOC: return LowerDYNAMIC_STACKALLOC(Op, DAG);
10867 case ISD::EH_RETURN: return LowerEH_RETURN(Op, DAG);
10868 case ISD::INIT_TRAMPOLINE: return LowerINIT_TRAMPOLINE(Op, DAG);
10869 case ISD::ADJUST_TRAMPOLINE: return LowerADJUST_TRAMPOLINE(Op, DAG);
10870 case ISD::FLT_ROUNDS_: return LowerFLT_ROUNDS_(Op, DAG);
10871 case ISD::CTLZ: return LowerCTLZ(Op, DAG);
10872 case ISD::CTLZ_ZERO_UNDEF: return LowerCTLZ_ZERO_UNDEF(Op, DAG);
10873 case ISD::CTTZ: return LowerCTTZ(Op, DAG);
10874 case ISD::MUL: return LowerMUL(Op, DAG);
10877 case ISD::SHL: return LowerShift(Op, DAG);
10883 case ISD::UMULO: return LowerXALUO(Op, DAG);
10884 case ISD::READCYCLECOUNTER: return LowerREADCYCLECOUNTER(Op, DAG);
10885 case ISD::BITCAST: return LowerBITCAST(Op, DAG);
10889 case ISD::SUBE: return LowerADDC_ADDE_SUBC_SUBE(Op, DAG);
10890 case ISD::ADD: return LowerADD(Op, DAG);
10891 case ISD::SUB: return LowerSUB(Op, DAG);
10895 static void ReplaceATOMIC_LOAD(SDNode *Node,
10896 SmallVectorImpl<SDValue> &Results,
10897 SelectionDAG &DAG) {
10898 DebugLoc dl = Node->getDebugLoc();
10899 EVT VT = cast<AtomicSDNode>(Node)->getMemoryVT();
10901 // Convert wide load -> cmpxchg8b/cmpxchg16b
10902 // FIXME: On 32-bit, load -> fild or movq would be more efficient
10903 // (The only way to get a 16-byte load is cmpxchg16b)
10904 // FIXME: 16-byte ATOMIC_CMP_SWAP isn't actually hooked up at the moment.
10905 SDValue Zero = DAG.getConstant(0, VT);
10906 SDValue Swap = DAG.getAtomic(ISD::ATOMIC_CMP_SWAP, dl, VT,
10907 Node->getOperand(0),
10908 Node->getOperand(1), Zero, Zero,
10909 cast<AtomicSDNode>(Node)->getMemOperand(),
10910 cast<AtomicSDNode>(Node)->getOrdering(),
10911 cast<AtomicSDNode>(Node)->getSynchScope());
10912 Results.push_back(Swap.getValue(0));
10913 Results.push_back(Swap.getValue(1));
10916 void X86TargetLowering::
10917 ReplaceATOMIC_BINARY_64(SDNode *Node, SmallVectorImpl<SDValue>&Results,
10918 SelectionDAG &DAG, unsigned NewOp) const {
10919 DebugLoc dl = Node->getDebugLoc();
10920 assert (Node->getValueType(0) == MVT::i64 &&
10921 "Only know how to expand i64 atomics");
10923 SDValue Chain = Node->getOperand(0);
10924 SDValue In1 = Node->getOperand(1);
10925 SDValue In2L = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
10926 Node->getOperand(2), DAG.getIntPtrConstant(0));
10927 SDValue In2H = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
10928 Node->getOperand(2), DAG.getIntPtrConstant(1));
10929 SDValue Ops[] = { Chain, In1, In2L, In2H };
10930 SDVTList Tys = DAG.getVTList(MVT::i32, MVT::i32, MVT::Other);
10932 DAG.getMemIntrinsicNode(NewOp, dl, Tys, Ops, 4, MVT::i64,
10933 cast<MemSDNode>(Node)->getMemOperand());
10934 SDValue OpsF[] = { Result.getValue(0), Result.getValue(1)};
10935 Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, OpsF, 2));
10936 Results.push_back(Result.getValue(2));
10939 /// ReplaceNodeResults - Replace a node with an illegal result type
10940 /// with a new node built out of custom code.
10941 void X86TargetLowering::ReplaceNodeResults(SDNode *N,
10942 SmallVectorImpl<SDValue>&Results,
10943 SelectionDAG &DAG) const {
10944 DebugLoc dl = N->getDebugLoc();
10945 switch (N->getOpcode()) {
10947 llvm_unreachable("Do not know how to custom type legalize this operation!");
10948 case ISD::SIGN_EXTEND_INREG:
10953 // We don't want to expand or promote these.
10955 case ISD::FP_TO_SINT:
10956 case ISD::FP_TO_UINT: {
10957 bool IsSigned = N->getOpcode() == ISD::FP_TO_SINT;
10959 if (!IsSigned && !isIntegerTypeFTOL(SDValue(N, 0).getValueType()))
10962 std::pair<SDValue,SDValue> Vals =
10963 FP_TO_INTHelper(SDValue(N, 0), DAG, IsSigned, /*IsReplace=*/ true);
10964 SDValue FIST = Vals.first, StackSlot = Vals.second;
10965 if (FIST.getNode() != 0) {
10966 EVT VT = N->getValueType(0);
10967 // Return a load from the stack slot.
10968 if (StackSlot.getNode() != 0)
10969 Results.push_back(DAG.getLoad(VT, dl, FIST, StackSlot,
10970 MachinePointerInfo(),
10971 false, false, false, 0));
10973 Results.push_back(FIST);
10977 case ISD::READCYCLECOUNTER: {
10978 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Glue);
10979 SDValue TheChain = N->getOperand(0);
10980 SDValue rd = DAG.getNode(X86ISD::RDTSC_DAG, dl, Tys, &TheChain, 1);
10981 SDValue eax = DAG.getCopyFromReg(rd, dl, X86::EAX, MVT::i32,
10983 SDValue edx = DAG.getCopyFromReg(eax.getValue(1), dl, X86::EDX, MVT::i32,
10985 // Use a buildpair to merge the two 32-bit values into a 64-bit one.
10986 SDValue Ops[] = { eax, edx };
10987 Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Ops, 2));
10988 Results.push_back(edx.getValue(1));
10991 case ISD::ATOMIC_CMP_SWAP: {
10992 EVT T = N->getValueType(0);
10993 assert((T == MVT::i64 || T == MVT::i128) && "can only expand cmpxchg pair");
10994 bool Regs64bit = T == MVT::i128;
10995 EVT HalfT = Regs64bit ? MVT::i64 : MVT::i32;
10996 SDValue cpInL, cpInH;
10997 cpInL = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, HalfT, N->getOperand(2),
10998 DAG.getConstant(0, HalfT));
10999 cpInH = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, HalfT, N->getOperand(2),
11000 DAG.getConstant(1, HalfT));
11001 cpInL = DAG.getCopyToReg(N->getOperand(0), dl,
11002 Regs64bit ? X86::RAX : X86::EAX,
11004 cpInH = DAG.getCopyToReg(cpInL.getValue(0), dl,
11005 Regs64bit ? X86::RDX : X86::EDX,
11006 cpInH, cpInL.getValue(1));
11007 SDValue swapInL, swapInH;
11008 swapInL = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, HalfT, N->getOperand(3),
11009 DAG.getConstant(0, HalfT));
11010 swapInH = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, HalfT, N->getOperand(3),
11011 DAG.getConstant(1, HalfT));
11012 swapInL = DAG.getCopyToReg(cpInH.getValue(0), dl,
11013 Regs64bit ? X86::RBX : X86::EBX,
11014 swapInL, cpInH.getValue(1));
11015 swapInH = DAG.getCopyToReg(swapInL.getValue(0), dl,
11016 Regs64bit ? X86::RCX : X86::ECX,
11017 swapInH, swapInL.getValue(1));
11018 SDValue Ops[] = { swapInH.getValue(0),
11020 swapInH.getValue(1) };
11021 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Glue);
11022 MachineMemOperand *MMO = cast<AtomicSDNode>(N)->getMemOperand();
11023 unsigned Opcode = Regs64bit ? X86ISD::LCMPXCHG16_DAG :
11024 X86ISD::LCMPXCHG8_DAG;
11025 SDValue Result = DAG.getMemIntrinsicNode(Opcode, dl, Tys,
11027 SDValue cpOutL = DAG.getCopyFromReg(Result.getValue(0), dl,
11028 Regs64bit ? X86::RAX : X86::EAX,
11029 HalfT, Result.getValue(1));
11030 SDValue cpOutH = DAG.getCopyFromReg(cpOutL.getValue(1), dl,
11031 Regs64bit ? X86::RDX : X86::EDX,
11032 HalfT, cpOutL.getValue(2));
11033 SDValue OpsF[] = { cpOutL.getValue(0), cpOutH.getValue(0)};
11034 Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, T, OpsF, 2));
11035 Results.push_back(cpOutH.getValue(1));
11038 case ISD::ATOMIC_LOAD_ADD:
11039 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMADD64_DAG);
11041 case ISD::ATOMIC_LOAD_AND:
11042 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMAND64_DAG);
11044 case ISD::ATOMIC_LOAD_NAND:
11045 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMNAND64_DAG);
11047 case ISD::ATOMIC_LOAD_OR:
11048 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMOR64_DAG);
11050 case ISD::ATOMIC_LOAD_SUB:
11051 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMSUB64_DAG);
11053 case ISD::ATOMIC_LOAD_XOR:
11054 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMXOR64_DAG);
11056 case ISD::ATOMIC_SWAP:
11057 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMSWAP64_DAG);
11059 case ISD::ATOMIC_LOAD:
11060 ReplaceATOMIC_LOAD(N, Results, DAG);
11064 const char *X86TargetLowering::getTargetNodeName(unsigned Opcode) const {
11066 default: return NULL;
11067 case X86ISD::BSF: return "X86ISD::BSF";
11068 case X86ISD::BSR: return "X86ISD::BSR";
11069 case X86ISD::SHLD: return "X86ISD::SHLD";
11070 case X86ISD::SHRD: return "X86ISD::SHRD";
11071 case X86ISD::FAND: return "X86ISD::FAND";
11072 case X86ISD::FOR: return "X86ISD::FOR";
11073 case X86ISD::FXOR: return "X86ISD::FXOR";
11074 case X86ISD::FSRL: return "X86ISD::FSRL";
11075 case X86ISD::FILD: return "X86ISD::FILD";
11076 case X86ISD::FILD_FLAG: return "X86ISD::FILD_FLAG";
11077 case X86ISD::FP_TO_INT16_IN_MEM: return "X86ISD::FP_TO_INT16_IN_MEM";
11078 case X86ISD::FP_TO_INT32_IN_MEM: return "X86ISD::FP_TO_INT32_IN_MEM";
11079 case X86ISD::FP_TO_INT64_IN_MEM: return "X86ISD::FP_TO_INT64_IN_MEM";
11080 case X86ISD::FLD: return "X86ISD::FLD";
11081 case X86ISD::FST: return "X86ISD::FST";
11082 case X86ISD::CALL: return "X86ISD::CALL";
11083 case X86ISD::RDTSC_DAG: return "X86ISD::RDTSC_DAG";
11084 case X86ISD::BT: return "X86ISD::BT";
11085 case X86ISD::CMP: return "X86ISD::CMP";
11086 case X86ISD::COMI: return "X86ISD::COMI";
11087 case X86ISD::UCOMI: return "X86ISD::UCOMI";
11088 case X86ISD::SETCC: return "X86ISD::SETCC";
11089 case X86ISD::SETCC_CARRY: return "X86ISD::SETCC_CARRY";
11090 case X86ISD::FSETCCsd: return "X86ISD::FSETCCsd";
11091 case X86ISD::FSETCCss: return "X86ISD::FSETCCss";
11092 case X86ISD::CMOV: return "X86ISD::CMOV";
11093 case X86ISD::BRCOND: return "X86ISD::BRCOND";
11094 case X86ISD::RET_FLAG: return "X86ISD::RET_FLAG";
11095 case X86ISD::REP_STOS: return "X86ISD::REP_STOS";
11096 case X86ISD::REP_MOVS: return "X86ISD::REP_MOVS";
11097 case X86ISD::GlobalBaseReg: return "X86ISD::GlobalBaseReg";
11098 case X86ISD::Wrapper: return "X86ISD::Wrapper";
11099 case X86ISD::WrapperRIP: return "X86ISD::WrapperRIP";
11100 case X86ISD::PEXTRB: return "X86ISD::PEXTRB";
11101 case X86ISD::PEXTRW: return "X86ISD::PEXTRW";
11102 case X86ISD::INSERTPS: return "X86ISD::INSERTPS";
11103 case X86ISD::PINSRB: return "X86ISD::PINSRB";
11104 case X86ISD::PINSRW: return "X86ISD::PINSRW";
11105 case X86ISD::PSHUFB: return "X86ISD::PSHUFB";
11106 case X86ISD::ANDNP: return "X86ISD::ANDNP";
11107 case X86ISD::PSIGN: return "X86ISD::PSIGN";
11108 case X86ISD::BLENDV: return "X86ISD::BLENDV";
11109 case X86ISD::BLENDPW: return "X86ISD::BLENDPW";
11110 case X86ISD::BLENDPS: return "X86ISD::BLENDPS";
11111 case X86ISD::BLENDPD: return "X86ISD::BLENDPD";
11112 case X86ISD::HADD: return "X86ISD::HADD";
11113 case X86ISD::HSUB: return "X86ISD::HSUB";
11114 case X86ISD::FHADD: return "X86ISD::FHADD";
11115 case X86ISD::FHSUB: return "X86ISD::FHSUB";
11116 case X86ISD::FMAX: return "X86ISD::FMAX";
11117 case X86ISD::FMIN: return "X86ISD::FMIN";
11118 case X86ISD::FRSQRT: return "X86ISD::FRSQRT";
11119 case X86ISD::FRCP: return "X86ISD::FRCP";
11120 case X86ISD::TLSADDR: return "X86ISD::TLSADDR";
11121 case X86ISD::TLSCALL: return "X86ISD::TLSCALL";
11122 case X86ISD::EH_RETURN: return "X86ISD::EH_RETURN";
11123 case X86ISD::TC_RETURN: return "X86ISD::TC_RETURN";
11124 case X86ISD::FNSTCW16m: return "X86ISD::FNSTCW16m";
11125 case X86ISD::LCMPXCHG_DAG: return "X86ISD::LCMPXCHG_DAG";
11126 case X86ISD::LCMPXCHG8_DAG: return "X86ISD::LCMPXCHG8_DAG";
11127 case X86ISD::ATOMADD64_DAG: return "X86ISD::ATOMADD64_DAG";
11128 case X86ISD::ATOMSUB64_DAG: return "X86ISD::ATOMSUB64_DAG";
11129 case X86ISD::ATOMOR64_DAG: return "X86ISD::ATOMOR64_DAG";
11130 case X86ISD::ATOMXOR64_DAG: return "X86ISD::ATOMXOR64_DAG";
11131 case X86ISD::ATOMAND64_DAG: return "X86ISD::ATOMAND64_DAG";
11132 case X86ISD::ATOMNAND64_DAG: return "X86ISD::ATOMNAND64_DAG";
11133 case X86ISD::VZEXT_MOVL: return "X86ISD::VZEXT_MOVL";
11134 case X86ISD::VZEXT_LOAD: return "X86ISD::VZEXT_LOAD";
11135 case X86ISD::VSHLDQ: return "X86ISD::VSHLDQ";
11136 case X86ISD::VSRLDQ: return "X86ISD::VSRLDQ";
11137 case X86ISD::VSHL: return "X86ISD::VSHL";
11138 case X86ISD::VSRL: return "X86ISD::VSRL";
11139 case X86ISD::VSRA: return "X86ISD::VSRA";
11140 case X86ISD::VSHLI: return "X86ISD::VSHLI";
11141 case X86ISD::VSRLI: return "X86ISD::VSRLI";
11142 case X86ISD::VSRAI: return "X86ISD::VSRAI";
11143 case X86ISD::CMPP: return "X86ISD::CMPP";
11144 case X86ISD::PCMPEQ: return "X86ISD::PCMPEQ";
11145 case X86ISD::PCMPGT: return "X86ISD::PCMPGT";
11146 case X86ISD::ADD: return "X86ISD::ADD";
11147 case X86ISD::SUB: return "X86ISD::SUB";
11148 case X86ISD::ADC: return "X86ISD::ADC";
11149 case X86ISD::SBB: return "X86ISD::SBB";
11150 case X86ISD::SMUL: return "X86ISD::SMUL";
11151 case X86ISD::UMUL: return "X86ISD::UMUL";
11152 case X86ISD::INC: return "X86ISD::INC";
11153 case X86ISD::DEC: return "X86ISD::DEC";
11154 case X86ISD::OR: return "X86ISD::OR";
11155 case X86ISD::XOR: return "X86ISD::XOR";
11156 case X86ISD::AND: return "X86ISD::AND";
11157 case X86ISD::ANDN: return "X86ISD::ANDN";
11158 case X86ISD::BLSI: return "X86ISD::BLSI";
11159 case X86ISD::BLSMSK: return "X86ISD::BLSMSK";
11160 case X86ISD::BLSR: return "X86ISD::BLSR";
11161 case X86ISD::MUL_IMM: return "X86ISD::MUL_IMM";
11162 case X86ISD::PTEST: return "X86ISD::PTEST";
11163 case X86ISD::TESTP: return "X86ISD::TESTP";
11164 case X86ISD::PALIGN: return "X86ISD::PALIGN";
11165 case X86ISD::PSHUFD: return "X86ISD::PSHUFD";
11166 case X86ISD::PSHUFHW: return "X86ISD::PSHUFHW";
11167 case X86ISD::PSHUFLW: return "X86ISD::PSHUFLW";
11168 case X86ISD::SHUFP: return "X86ISD::SHUFP";
11169 case X86ISD::MOVLHPS: return "X86ISD::MOVLHPS";
11170 case X86ISD::MOVLHPD: return "X86ISD::MOVLHPD";
11171 case X86ISD::MOVHLPS: return "X86ISD::MOVHLPS";
11172 case X86ISD::MOVLPS: return "X86ISD::MOVLPS";
11173 case X86ISD::MOVLPD: return "X86ISD::MOVLPD";
11174 case X86ISD::MOVDDUP: return "X86ISD::MOVDDUP";
11175 case X86ISD::MOVSHDUP: return "X86ISD::MOVSHDUP";
11176 case X86ISD::MOVSLDUP: return "X86ISD::MOVSLDUP";
11177 case X86ISD::MOVSD: return "X86ISD::MOVSD";
11178 case X86ISD::MOVSS: return "X86ISD::MOVSS";
11179 case X86ISD::UNPCKL: return "X86ISD::UNPCKL";
11180 case X86ISD::UNPCKH: return "X86ISD::UNPCKH";
11181 case X86ISD::VBROADCAST: return "X86ISD::VBROADCAST";
11182 case X86ISD::VPERMILP: return "X86ISD::VPERMILP";
11183 case X86ISD::VPERM2X128: return "X86ISD::VPERM2X128";
11184 case X86ISD::VPERMV: return "X86ISD::VPERMV";
11185 case X86ISD::VPERMI: return "X86ISD::VPERMI";
11186 case X86ISD::PMULUDQ: return "X86ISD::PMULUDQ";
11187 case X86ISD::VASTART_SAVE_XMM_REGS: return "X86ISD::VASTART_SAVE_XMM_REGS";
11188 case X86ISD::VAARG_64: return "X86ISD::VAARG_64";
11189 case X86ISD::WIN_ALLOCA: return "X86ISD::WIN_ALLOCA";
11190 case X86ISD::MEMBARRIER: return "X86ISD::MEMBARRIER";
11191 case X86ISD::SEG_ALLOCA: return "X86ISD::SEG_ALLOCA";
11192 case X86ISD::WIN_FTOL: return "X86ISD::WIN_FTOL";
11196 // isLegalAddressingMode - Return true if the addressing mode represented
11197 // by AM is legal for this target, for a load/store of the specified type.
11198 bool X86TargetLowering::isLegalAddressingMode(const AddrMode &AM,
11200 // X86 supports extremely general addressing modes.
11201 CodeModel::Model M = getTargetMachine().getCodeModel();
11202 Reloc::Model R = getTargetMachine().getRelocationModel();
11204 // X86 allows a sign-extended 32-bit immediate field as a displacement.
11205 if (!X86::isOffsetSuitableForCodeModel(AM.BaseOffs, M, AM.BaseGV != NULL))
11210 Subtarget->ClassifyGlobalReference(AM.BaseGV, getTargetMachine());
11212 // If a reference to this global requires an extra load, we can't fold it.
11213 if (isGlobalStubReference(GVFlags))
11216 // If BaseGV requires a register for the PIC base, we cannot also have a
11217 // BaseReg specified.
11218 if (AM.HasBaseReg && isGlobalRelativeToPICBase(GVFlags))
11221 // If lower 4G is not available, then we must use rip-relative addressing.
11222 if ((M != CodeModel::Small || R != Reloc::Static) &&
11223 Subtarget->is64Bit() && (AM.BaseOffs || AM.Scale > 1))
11227 switch (AM.Scale) {
11233 // These scales always work.
11238 // These scales are formed with basereg+scalereg. Only accept if there is
11243 default: // Other stuff never works.
11251 bool X86TargetLowering::isTruncateFree(Type *Ty1, Type *Ty2) const {
11252 if (!Ty1->isIntegerTy() || !Ty2->isIntegerTy())
11254 unsigned NumBits1 = Ty1->getPrimitiveSizeInBits();
11255 unsigned NumBits2 = Ty2->getPrimitiveSizeInBits();
11256 if (NumBits1 <= NumBits2)
11261 bool X86TargetLowering::isTruncateFree(EVT VT1, EVT VT2) const {
11262 if (!VT1.isInteger() || !VT2.isInteger())
11264 unsigned NumBits1 = VT1.getSizeInBits();
11265 unsigned NumBits2 = VT2.getSizeInBits();
11266 if (NumBits1 <= NumBits2)
11271 bool X86TargetLowering::isZExtFree(Type *Ty1, Type *Ty2) const {
11272 // x86-64 implicitly zero-extends 32-bit results in 64-bit registers.
11273 return Ty1->isIntegerTy(32) && Ty2->isIntegerTy(64) && Subtarget->is64Bit();
11276 bool X86TargetLowering::isZExtFree(EVT VT1, EVT VT2) const {
11277 // x86-64 implicitly zero-extends 32-bit results in 64-bit registers.
11278 return VT1 == MVT::i32 && VT2 == MVT::i64 && Subtarget->is64Bit();
11281 bool X86TargetLowering::isNarrowingProfitable(EVT VT1, EVT VT2) const {
11282 // i16 instructions are longer (0x66 prefix) and potentially slower.
11283 return !(VT1 == MVT::i32 && VT2 == MVT::i16);
11286 /// isShuffleMaskLegal - Targets can use this to indicate that they only
11287 /// support *some* VECTOR_SHUFFLE operations, those with specific masks.
11288 /// By default, if a target supports the VECTOR_SHUFFLE node, all mask values
11289 /// are assumed to be legal.
11291 X86TargetLowering::isShuffleMaskLegal(const SmallVectorImpl<int> &M,
11293 // Very little shuffling can be done for 64-bit vectors right now.
11294 if (VT.getSizeInBits() == 64)
11297 // FIXME: pshufb, blends, shifts.
11298 return (VT.getVectorNumElements() == 2 ||
11299 ShuffleVectorSDNode::isSplatMask(&M[0], VT) ||
11300 isMOVLMask(M, VT) ||
11301 isSHUFPMask(M, VT, Subtarget->hasAVX()) ||
11302 isPSHUFDMask(M, VT) ||
11303 isPSHUFHWMask(M, VT) ||
11304 isPSHUFLWMask(M, VT) ||
11305 isPALIGNRMask(M, VT, Subtarget) ||
11306 isUNPCKLMask(M, VT, Subtarget->hasAVX2()) ||
11307 isUNPCKHMask(M, VT, Subtarget->hasAVX2()) ||
11308 isUNPCKL_v_undef_Mask(M, VT, Subtarget->hasAVX2()) ||
11309 isUNPCKH_v_undef_Mask(M, VT, Subtarget->hasAVX2()));
11313 X86TargetLowering::isVectorClearMaskLegal(const SmallVectorImpl<int> &Mask,
11315 unsigned NumElts = VT.getVectorNumElements();
11316 // FIXME: This collection of masks seems suspect.
11319 if (NumElts == 4 && VT.getSizeInBits() == 128) {
11320 return (isMOVLMask(Mask, VT) ||
11321 isCommutedMOVLMask(Mask, VT, true) ||
11322 isSHUFPMask(Mask, VT, Subtarget->hasAVX()) ||
11323 isSHUFPMask(Mask, VT, Subtarget->hasAVX(), /* Commuted */ true));
11328 //===----------------------------------------------------------------------===//
11329 // X86 Scheduler Hooks
11330 //===----------------------------------------------------------------------===//
11332 // private utility function
11333 MachineBasicBlock *
11334 X86TargetLowering::EmitAtomicBitwiseWithCustomInserter(MachineInstr *bInstr,
11335 MachineBasicBlock *MBB,
11342 const TargetRegisterClass *RC,
11343 bool Invert) const {
11344 // For the atomic bitwise operator, we generate
11347 // ld t1 = [bitinstr.addr]
11348 // op t2 = t1, [bitinstr.val]
11349 // not t3 = t2 (if Invert)
11351 // lcs dest = [bitinstr.addr], t3 [EAX is implicit]
11353 // fallthrough -->nextMBB
11354 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
11355 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
11356 MachineFunction::iterator MBBIter = MBB;
11359 /// First build the CFG
11360 MachineFunction *F = MBB->getParent();
11361 MachineBasicBlock *thisMBB = MBB;
11362 MachineBasicBlock *newMBB = F->CreateMachineBasicBlock(LLVM_BB);
11363 MachineBasicBlock *nextMBB = F->CreateMachineBasicBlock(LLVM_BB);
11364 F->insert(MBBIter, newMBB);
11365 F->insert(MBBIter, nextMBB);
11367 // Transfer the remainder of thisMBB and its successor edges to nextMBB.
11368 nextMBB->splice(nextMBB->begin(), thisMBB,
11369 llvm::next(MachineBasicBlock::iterator(bInstr)),
11371 nextMBB->transferSuccessorsAndUpdatePHIs(thisMBB);
11373 // Update thisMBB to fall through to newMBB
11374 thisMBB->addSuccessor(newMBB);
11376 // newMBB jumps to itself and fall through to nextMBB
11377 newMBB->addSuccessor(nextMBB);
11378 newMBB->addSuccessor(newMBB);
11380 // Insert instructions into newMBB based on incoming instruction
11381 assert(bInstr->getNumOperands() < X86::AddrNumOperands + 4 &&
11382 "unexpected number of operands");
11383 DebugLoc dl = bInstr->getDebugLoc();
11384 MachineOperand& destOper = bInstr->getOperand(0);
11385 MachineOperand* argOpers[2 + X86::AddrNumOperands];
11386 int numArgs = bInstr->getNumOperands() - 1;
11387 for (int i=0; i < numArgs; ++i)
11388 argOpers[i] = &bInstr->getOperand(i+1);
11390 // x86 address has 4 operands: base, index, scale, and displacement
11391 int lastAddrIndx = X86::AddrNumOperands - 1; // [0,3]
11392 int valArgIndx = lastAddrIndx + 1;
11394 unsigned t1 = F->getRegInfo().createVirtualRegister(RC);
11395 MachineInstrBuilder MIB = BuildMI(newMBB, dl, TII->get(LoadOpc), t1);
11396 for (int i=0; i <= lastAddrIndx; ++i)
11397 (*MIB).addOperand(*argOpers[i]);
11399 unsigned t2 = F->getRegInfo().createVirtualRegister(RC);
11400 assert((argOpers[valArgIndx]->isReg() ||
11401 argOpers[valArgIndx]->isImm()) &&
11402 "invalid operand");
11403 if (argOpers[valArgIndx]->isReg())
11404 MIB = BuildMI(newMBB, dl, TII->get(regOpc), t2);
11406 MIB = BuildMI(newMBB, dl, TII->get(immOpc), t2);
11408 (*MIB).addOperand(*argOpers[valArgIndx]);
11410 unsigned t3 = F->getRegInfo().createVirtualRegister(RC);
11412 MIB = BuildMI(newMBB, dl, TII->get(notOpc), t3).addReg(t2);
11417 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), EAXreg);
11420 MIB = BuildMI(newMBB, dl, TII->get(CXchgOpc));
11421 for (int i=0; i <= lastAddrIndx; ++i)
11422 (*MIB).addOperand(*argOpers[i]);
11424 assert(bInstr->hasOneMemOperand() && "Unexpected number of memoperand");
11425 (*MIB).setMemRefs(bInstr->memoperands_begin(),
11426 bInstr->memoperands_end());
11428 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), destOper.getReg());
11429 MIB.addReg(EAXreg);
11432 BuildMI(newMBB, dl, TII->get(X86::JNE_4)).addMBB(newMBB);
11434 bInstr->eraseFromParent(); // The pseudo instruction is gone now.
11438 // private utility function: 64 bit atomics on 32 bit host.
11439 MachineBasicBlock *
11440 X86TargetLowering::EmitAtomicBit6432WithCustomInserter(MachineInstr *bInstr,
11441 MachineBasicBlock *MBB,
11446 bool Invert) const {
11447 // For the atomic bitwise operator, we generate
11448 // thisMBB (instructions are in pairs, except cmpxchg8b)
11449 // ld t1,t2 = [bitinstr.addr]
11451 // out1, out2 = phi (thisMBB, t1/t2) (newMBB, t3/t4)
11452 // op t5, t6 <- out1, out2, [bitinstr.val]
11453 // (for SWAP, substitute: mov t5, t6 <- [bitinstr.val])
11454 // neg t7, t8 < t5, t6 (if Invert)
11455 // mov ECX, EBX <- t5, t6
11456 // mov EAX, EDX <- t1, t2
11457 // cmpxchg8b [bitinstr.addr] [EAX, EDX, EBX, ECX implicit]
11458 // mov t3, t4 <- EAX, EDX
11460 // result in out1, out2
11461 // fallthrough -->nextMBB
11463 const TargetRegisterClass *RC = X86::GR32RegisterClass;
11464 const unsigned LoadOpc = X86::MOV32rm;
11465 const unsigned NotOpc = X86::NOT32r;
11466 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
11467 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
11468 MachineFunction::iterator MBBIter = MBB;
11471 /// First build the CFG
11472 MachineFunction *F = MBB->getParent();
11473 MachineBasicBlock *thisMBB = MBB;
11474 MachineBasicBlock *newMBB = F->CreateMachineBasicBlock(LLVM_BB);
11475 MachineBasicBlock *nextMBB = F->CreateMachineBasicBlock(LLVM_BB);
11476 F->insert(MBBIter, newMBB);
11477 F->insert(MBBIter, nextMBB);
11479 // Transfer the remainder of thisMBB and its successor edges to nextMBB.
11480 nextMBB->splice(nextMBB->begin(), thisMBB,
11481 llvm::next(MachineBasicBlock::iterator(bInstr)),
11483 nextMBB->transferSuccessorsAndUpdatePHIs(thisMBB);
11485 // Update thisMBB to fall through to newMBB
11486 thisMBB->addSuccessor(newMBB);
11488 // newMBB jumps to itself and fall through to nextMBB
11489 newMBB->addSuccessor(nextMBB);
11490 newMBB->addSuccessor(newMBB);
11492 DebugLoc dl = bInstr->getDebugLoc();
11493 // Insert instructions into newMBB based on incoming instruction
11494 // There are 8 "real" operands plus 9 implicit def/uses, ignored here.
11495 assert(bInstr->getNumOperands() < X86::AddrNumOperands + 14 &&
11496 "unexpected number of operands");
11497 MachineOperand& dest1Oper = bInstr->getOperand(0);
11498 MachineOperand& dest2Oper = bInstr->getOperand(1);
11499 MachineOperand* argOpers[2 + X86::AddrNumOperands];
11500 for (int i=0; i < 2 + X86::AddrNumOperands; ++i) {
11501 argOpers[i] = &bInstr->getOperand(i+2);
11503 // We use some of the operands multiple times, so conservatively just
11504 // clear any kill flags that might be present.
11505 if (argOpers[i]->isReg() && argOpers[i]->isUse())
11506 argOpers[i]->setIsKill(false);
11509 // x86 address has 5 operands: base, index, scale, displacement, and segment.
11510 int lastAddrIndx = X86::AddrNumOperands - 1; // [0,3]
11512 unsigned t1 = F->getRegInfo().createVirtualRegister(RC);
11513 MachineInstrBuilder MIB = BuildMI(thisMBB, dl, TII->get(LoadOpc), t1);
11514 for (int i=0; i <= lastAddrIndx; ++i)
11515 (*MIB).addOperand(*argOpers[i]);
11516 unsigned t2 = F->getRegInfo().createVirtualRegister(RC);
11517 MIB = BuildMI(thisMBB, dl, TII->get(LoadOpc), t2);
11518 // add 4 to displacement.
11519 for (int i=0; i <= lastAddrIndx-2; ++i)
11520 (*MIB).addOperand(*argOpers[i]);
11521 MachineOperand newOp3 = *(argOpers[3]);
11522 if (newOp3.isImm())
11523 newOp3.setImm(newOp3.getImm()+4);
11525 newOp3.setOffset(newOp3.getOffset()+4);
11526 (*MIB).addOperand(newOp3);
11527 (*MIB).addOperand(*argOpers[lastAddrIndx]);
11529 // t3/4 are defined later, at the bottom of the loop
11530 unsigned t3 = F->getRegInfo().createVirtualRegister(RC);
11531 unsigned t4 = F->getRegInfo().createVirtualRegister(RC);
11532 BuildMI(newMBB, dl, TII->get(X86::PHI), dest1Oper.getReg())
11533 .addReg(t1).addMBB(thisMBB).addReg(t3).addMBB(newMBB);
11534 BuildMI(newMBB, dl, TII->get(X86::PHI), dest2Oper.getReg())
11535 .addReg(t2).addMBB(thisMBB).addReg(t4).addMBB(newMBB);
11537 // The subsequent operations should be using the destination registers of
11538 // the PHI instructions.
11539 t1 = dest1Oper.getReg();
11540 t2 = dest2Oper.getReg();
11542 int valArgIndx = lastAddrIndx + 1;
11543 assert((argOpers[valArgIndx]->isReg() ||
11544 argOpers[valArgIndx]->isImm()) &&
11545 "invalid operand");
11546 unsigned t5 = F->getRegInfo().createVirtualRegister(RC);
11547 unsigned t6 = F->getRegInfo().createVirtualRegister(RC);
11548 if (argOpers[valArgIndx]->isReg())
11549 MIB = BuildMI(newMBB, dl, TII->get(regOpcL), t5);
11551 MIB = BuildMI(newMBB, dl, TII->get(immOpcL), t5);
11552 if (regOpcL != X86::MOV32rr)
11554 (*MIB).addOperand(*argOpers[valArgIndx]);
11555 assert(argOpers[valArgIndx + 1]->isReg() ==
11556 argOpers[valArgIndx]->isReg());
11557 assert(argOpers[valArgIndx + 1]->isImm() ==
11558 argOpers[valArgIndx]->isImm());
11559 if (argOpers[valArgIndx + 1]->isReg())
11560 MIB = BuildMI(newMBB, dl, TII->get(regOpcH), t6);
11562 MIB = BuildMI(newMBB, dl, TII->get(immOpcH), t6);
11563 if (regOpcH != X86::MOV32rr)
11565 (*MIB).addOperand(*argOpers[valArgIndx + 1]);
11569 t7 = F->getRegInfo().createVirtualRegister(RC);
11570 t8 = F->getRegInfo().createVirtualRegister(RC);
11571 MIB = BuildMI(newMBB, dl, TII->get(NotOpc), t7).addReg(t5);
11572 MIB = BuildMI(newMBB, dl, TII->get(NotOpc), t8).addReg(t6);
11578 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), X86::EAX);
11580 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), X86::EDX);
11583 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), X86::EBX);
11585 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), X86::ECX);
11588 MIB = BuildMI(newMBB, dl, TII->get(X86::LCMPXCHG8B));
11589 for (int i=0; i <= lastAddrIndx; ++i)
11590 (*MIB).addOperand(*argOpers[i]);
11592 assert(bInstr->hasOneMemOperand() && "Unexpected number of memoperand");
11593 (*MIB).setMemRefs(bInstr->memoperands_begin(),
11594 bInstr->memoperands_end());
11596 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), t3);
11597 MIB.addReg(X86::EAX);
11598 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), t4);
11599 MIB.addReg(X86::EDX);
11602 BuildMI(newMBB, dl, TII->get(X86::JNE_4)).addMBB(newMBB);
11604 bInstr->eraseFromParent(); // The pseudo instruction is gone now.
11608 // private utility function
11609 MachineBasicBlock *
11610 X86TargetLowering::EmitAtomicMinMaxWithCustomInserter(MachineInstr *mInstr,
11611 MachineBasicBlock *MBB,
11612 unsigned cmovOpc) const {
11613 // For the atomic min/max operator, we generate
11616 // ld t1 = [min/max.addr]
11617 // mov t2 = [min/max.val]
11619 // cmov[cond] t2 = t1
11621 // lcs dest = [bitinstr.addr], t2 [EAX is implicit]
11623 // fallthrough -->nextMBB
11625 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
11626 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
11627 MachineFunction::iterator MBBIter = MBB;
11630 /// First build the CFG
11631 MachineFunction *F = MBB->getParent();
11632 MachineBasicBlock *thisMBB = MBB;
11633 MachineBasicBlock *newMBB = F->CreateMachineBasicBlock(LLVM_BB);
11634 MachineBasicBlock *nextMBB = F->CreateMachineBasicBlock(LLVM_BB);
11635 F->insert(MBBIter, newMBB);
11636 F->insert(MBBIter, nextMBB);
11638 // Transfer the remainder of thisMBB and its successor edges to nextMBB.
11639 nextMBB->splice(nextMBB->begin(), thisMBB,
11640 llvm::next(MachineBasicBlock::iterator(mInstr)),
11642 nextMBB->transferSuccessorsAndUpdatePHIs(thisMBB);
11644 // Update thisMBB to fall through to newMBB
11645 thisMBB->addSuccessor(newMBB);
11647 // newMBB jumps to newMBB and fall through to nextMBB
11648 newMBB->addSuccessor(nextMBB);
11649 newMBB->addSuccessor(newMBB);
11651 DebugLoc dl = mInstr->getDebugLoc();
11652 // Insert instructions into newMBB based on incoming instruction
11653 assert(mInstr->getNumOperands() < X86::AddrNumOperands + 4 &&
11654 "unexpected number of operands");
11655 MachineOperand& destOper = mInstr->getOperand(0);
11656 MachineOperand* argOpers[2 + X86::AddrNumOperands];
11657 int numArgs = mInstr->getNumOperands() - 1;
11658 for (int i=0; i < numArgs; ++i)
11659 argOpers[i] = &mInstr->getOperand(i+1);
11661 // x86 address has 4 operands: base, index, scale, and displacement
11662 int lastAddrIndx = X86::AddrNumOperands - 1; // [0,3]
11663 int valArgIndx = lastAddrIndx + 1;
11665 unsigned t1 = F->getRegInfo().createVirtualRegister(X86::GR32RegisterClass);
11666 MachineInstrBuilder MIB = BuildMI(newMBB, dl, TII->get(X86::MOV32rm), t1);
11667 for (int i=0; i <= lastAddrIndx; ++i)
11668 (*MIB).addOperand(*argOpers[i]);
11670 // We only support register and immediate values
11671 assert((argOpers[valArgIndx]->isReg() ||
11672 argOpers[valArgIndx]->isImm()) &&
11673 "invalid operand");
11675 unsigned t2 = F->getRegInfo().createVirtualRegister(X86::GR32RegisterClass);
11676 if (argOpers[valArgIndx]->isReg())
11677 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), t2);
11679 MIB = BuildMI(newMBB, dl, TII->get(X86::MOV32rr), t2);
11680 (*MIB).addOperand(*argOpers[valArgIndx]);
11682 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), X86::EAX);
11685 MIB = BuildMI(newMBB, dl, TII->get(X86::CMP32rr));
11690 unsigned t3 = F->getRegInfo().createVirtualRegister(X86::GR32RegisterClass);
11691 MIB = BuildMI(newMBB, dl, TII->get(cmovOpc),t3);
11695 // Cmp and exchange if none has modified the memory location
11696 MIB = BuildMI(newMBB, dl, TII->get(X86::LCMPXCHG32));
11697 for (int i=0; i <= lastAddrIndx; ++i)
11698 (*MIB).addOperand(*argOpers[i]);
11700 assert(mInstr->hasOneMemOperand() && "Unexpected number of memoperand");
11701 (*MIB).setMemRefs(mInstr->memoperands_begin(),
11702 mInstr->memoperands_end());
11704 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), destOper.getReg());
11705 MIB.addReg(X86::EAX);
11708 BuildMI(newMBB, dl, TII->get(X86::JNE_4)).addMBB(newMBB);
11710 mInstr->eraseFromParent(); // The pseudo instruction is gone now.
11714 // FIXME: When we get size specific XMM0 registers, i.e. XMM0_V16I8
11715 // or XMM0_V32I8 in AVX all of this code can be replaced with that
11716 // in the .td file.
11717 MachineBasicBlock *
11718 X86TargetLowering::EmitPCMP(MachineInstr *MI, MachineBasicBlock *BB,
11719 unsigned numArgs, bool memArg) const {
11720 assert(Subtarget->hasSSE42() &&
11721 "Target must have SSE4.2 or AVX features enabled");
11723 DebugLoc dl = MI->getDebugLoc();
11724 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
11726 if (!Subtarget->hasAVX()) {
11728 Opc = numArgs == 3 ? X86::PCMPISTRM128rm : X86::PCMPESTRM128rm;
11730 Opc = numArgs == 3 ? X86::PCMPISTRM128rr : X86::PCMPESTRM128rr;
11733 Opc = numArgs == 3 ? X86::VPCMPISTRM128rm : X86::VPCMPESTRM128rm;
11735 Opc = numArgs == 3 ? X86::VPCMPISTRM128rr : X86::VPCMPESTRM128rr;
11738 MachineInstrBuilder MIB = BuildMI(*BB, MI, dl, TII->get(Opc));
11739 for (unsigned i = 0; i < numArgs; ++i) {
11740 MachineOperand &Op = MI->getOperand(i+1);
11741 if (!(Op.isReg() && Op.isImplicit()))
11742 MIB.addOperand(Op);
11744 BuildMI(*BB, MI, dl,
11745 TII->get(Subtarget->hasAVX() ? X86::VMOVAPSrr : X86::MOVAPSrr),
11746 MI->getOperand(0).getReg())
11747 .addReg(X86::XMM0);
11749 MI->eraseFromParent();
11753 MachineBasicBlock *
11754 X86TargetLowering::EmitMonitor(MachineInstr *MI, MachineBasicBlock *BB) const {
11755 DebugLoc dl = MI->getDebugLoc();
11756 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
11758 // Address into RAX/EAX, other two args into ECX, EDX.
11759 unsigned MemOpc = Subtarget->is64Bit() ? X86::LEA64r : X86::LEA32r;
11760 unsigned MemReg = Subtarget->is64Bit() ? X86::RAX : X86::EAX;
11761 MachineInstrBuilder MIB = BuildMI(*BB, MI, dl, TII->get(MemOpc), MemReg);
11762 for (int i = 0; i < X86::AddrNumOperands; ++i)
11763 MIB.addOperand(MI->getOperand(i));
11765 unsigned ValOps = X86::AddrNumOperands;
11766 BuildMI(*BB, MI, dl, TII->get(TargetOpcode::COPY), X86::ECX)
11767 .addReg(MI->getOperand(ValOps).getReg());
11768 BuildMI(*BB, MI, dl, TII->get(TargetOpcode::COPY), X86::EDX)
11769 .addReg(MI->getOperand(ValOps+1).getReg());
11771 // The instruction doesn't actually take any operands though.
11772 BuildMI(*BB, MI, dl, TII->get(X86::MONITORrrr));
11774 MI->eraseFromParent(); // The pseudo is gone now.
11778 MachineBasicBlock *
11779 X86TargetLowering::EmitMwait(MachineInstr *MI, MachineBasicBlock *BB) const {
11780 DebugLoc dl = MI->getDebugLoc();
11781 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
11783 // First arg in ECX, the second in EAX.
11784 BuildMI(*BB, MI, dl, TII->get(TargetOpcode::COPY), X86::ECX)
11785 .addReg(MI->getOperand(0).getReg());
11786 BuildMI(*BB, MI, dl, TII->get(TargetOpcode::COPY), X86::EAX)
11787 .addReg(MI->getOperand(1).getReg());
11789 // The instruction doesn't actually take any operands though.
11790 BuildMI(*BB, MI, dl, TII->get(X86::MWAITrr));
11792 MI->eraseFromParent(); // The pseudo is gone now.
11796 MachineBasicBlock *
11797 X86TargetLowering::EmitVAARG64WithCustomInserter(
11799 MachineBasicBlock *MBB) const {
11800 // Emit va_arg instruction on X86-64.
11802 // Operands to this pseudo-instruction:
11803 // 0 ) Output : destination address (reg)
11804 // 1-5) Input : va_list address (addr, i64mem)
11805 // 6 ) ArgSize : Size (in bytes) of vararg type
11806 // 7 ) ArgMode : 0=overflow only, 1=use gp_offset, 2=use fp_offset
11807 // 8 ) Align : Alignment of type
11808 // 9 ) EFLAGS (implicit-def)
11810 assert(MI->getNumOperands() == 10 && "VAARG_64 should have 10 operands!");
11811 assert(X86::AddrNumOperands == 5 && "VAARG_64 assumes 5 address operands");
11813 unsigned DestReg = MI->getOperand(0).getReg();
11814 MachineOperand &Base = MI->getOperand(1);
11815 MachineOperand &Scale = MI->getOperand(2);
11816 MachineOperand &Index = MI->getOperand(3);
11817 MachineOperand &Disp = MI->getOperand(4);
11818 MachineOperand &Segment = MI->getOperand(5);
11819 unsigned ArgSize = MI->getOperand(6).getImm();
11820 unsigned ArgMode = MI->getOperand(7).getImm();
11821 unsigned Align = MI->getOperand(8).getImm();
11823 // Memory Reference
11824 assert(MI->hasOneMemOperand() && "Expected VAARG_64 to have one memoperand");
11825 MachineInstr::mmo_iterator MMOBegin = MI->memoperands_begin();
11826 MachineInstr::mmo_iterator MMOEnd = MI->memoperands_end();
11828 // Machine Information
11829 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
11830 MachineRegisterInfo &MRI = MBB->getParent()->getRegInfo();
11831 const TargetRegisterClass *AddrRegClass = getRegClassFor(MVT::i64);
11832 const TargetRegisterClass *OffsetRegClass = getRegClassFor(MVT::i32);
11833 DebugLoc DL = MI->getDebugLoc();
11835 // struct va_list {
11838 // i64 overflow_area (address)
11839 // i64 reg_save_area (address)
11841 // sizeof(va_list) = 24
11842 // alignment(va_list) = 8
11844 unsigned TotalNumIntRegs = 6;
11845 unsigned TotalNumXMMRegs = 8;
11846 bool UseGPOffset = (ArgMode == 1);
11847 bool UseFPOffset = (ArgMode == 2);
11848 unsigned MaxOffset = TotalNumIntRegs * 8 +
11849 (UseFPOffset ? TotalNumXMMRegs * 16 : 0);
11851 /* Align ArgSize to a multiple of 8 */
11852 unsigned ArgSizeA8 = (ArgSize + 7) & ~7;
11853 bool NeedsAlign = (Align > 8);
11855 MachineBasicBlock *thisMBB = MBB;
11856 MachineBasicBlock *overflowMBB;
11857 MachineBasicBlock *offsetMBB;
11858 MachineBasicBlock *endMBB;
11860 unsigned OffsetDestReg = 0; // Argument address computed by offsetMBB
11861 unsigned OverflowDestReg = 0; // Argument address computed by overflowMBB
11862 unsigned OffsetReg = 0;
11864 if (!UseGPOffset && !UseFPOffset) {
11865 // If we only pull from the overflow region, we don't create a branch.
11866 // We don't need to alter control flow.
11867 OffsetDestReg = 0; // unused
11868 OverflowDestReg = DestReg;
11871 overflowMBB = thisMBB;
11874 // First emit code to check if gp_offset (or fp_offset) is below the bound.
11875 // If so, pull the argument from reg_save_area. (branch to offsetMBB)
11876 // If not, pull from overflow_area. (branch to overflowMBB)
11881 // offsetMBB overflowMBB
11886 // Registers for the PHI in endMBB
11887 OffsetDestReg = MRI.createVirtualRegister(AddrRegClass);
11888 OverflowDestReg = MRI.createVirtualRegister(AddrRegClass);
11890 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
11891 MachineFunction *MF = MBB->getParent();
11892 overflowMBB = MF->CreateMachineBasicBlock(LLVM_BB);
11893 offsetMBB = MF->CreateMachineBasicBlock(LLVM_BB);
11894 endMBB = MF->CreateMachineBasicBlock(LLVM_BB);
11896 MachineFunction::iterator MBBIter = MBB;
11899 // Insert the new basic blocks
11900 MF->insert(MBBIter, offsetMBB);
11901 MF->insert(MBBIter, overflowMBB);
11902 MF->insert(MBBIter, endMBB);
11904 // Transfer the remainder of MBB and its successor edges to endMBB.
11905 endMBB->splice(endMBB->begin(), thisMBB,
11906 llvm::next(MachineBasicBlock::iterator(MI)),
11908 endMBB->transferSuccessorsAndUpdatePHIs(thisMBB);
11910 // Make offsetMBB and overflowMBB successors of thisMBB
11911 thisMBB->addSuccessor(offsetMBB);
11912 thisMBB->addSuccessor(overflowMBB);
11914 // endMBB is a successor of both offsetMBB and overflowMBB
11915 offsetMBB->addSuccessor(endMBB);
11916 overflowMBB->addSuccessor(endMBB);
11918 // Load the offset value into a register
11919 OffsetReg = MRI.createVirtualRegister(OffsetRegClass);
11920 BuildMI(thisMBB, DL, TII->get(X86::MOV32rm), OffsetReg)
11924 .addDisp(Disp, UseFPOffset ? 4 : 0)
11925 .addOperand(Segment)
11926 .setMemRefs(MMOBegin, MMOEnd);
11928 // Check if there is enough room left to pull this argument.
11929 BuildMI(thisMBB, DL, TII->get(X86::CMP32ri))
11931 .addImm(MaxOffset + 8 - ArgSizeA8);
11933 // Branch to "overflowMBB" if offset >= max
11934 // Fall through to "offsetMBB" otherwise
11935 BuildMI(thisMBB, DL, TII->get(X86::GetCondBranchFromCond(X86::COND_AE)))
11936 .addMBB(overflowMBB);
11939 // In offsetMBB, emit code to use the reg_save_area.
11941 assert(OffsetReg != 0);
11943 // Read the reg_save_area address.
11944 unsigned RegSaveReg = MRI.createVirtualRegister(AddrRegClass);
11945 BuildMI(offsetMBB, DL, TII->get(X86::MOV64rm), RegSaveReg)
11950 .addOperand(Segment)
11951 .setMemRefs(MMOBegin, MMOEnd);
11953 // Zero-extend the offset
11954 unsigned OffsetReg64 = MRI.createVirtualRegister(AddrRegClass);
11955 BuildMI(offsetMBB, DL, TII->get(X86::SUBREG_TO_REG), OffsetReg64)
11958 .addImm(X86::sub_32bit);
11960 // Add the offset to the reg_save_area to get the final address.
11961 BuildMI(offsetMBB, DL, TII->get(X86::ADD64rr), OffsetDestReg)
11962 .addReg(OffsetReg64)
11963 .addReg(RegSaveReg);
11965 // Compute the offset for the next argument
11966 unsigned NextOffsetReg = MRI.createVirtualRegister(OffsetRegClass);
11967 BuildMI(offsetMBB, DL, TII->get(X86::ADD32ri), NextOffsetReg)
11969 .addImm(UseFPOffset ? 16 : 8);
11971 // Store it back into the va_list.
11972 BuildMI(offsetMBB, DL, TII->get(X86::MOV32mr))
11976 .addDisp(Disp, UseFPOffset ? 4 : 0)
11977 .addOperand(Segment)
11978 .addReg(NextOffsetReg)
11979 .setMemRefs(MMOBegin, MMOEnd);
11982 BuildMI(offsetMBB, DL, TII->get(X86::JMP_4))
11987 // Emit code to use overflow area
11990 // Load the overflow_area address into a register.
11991 unsigned OverflowAddrReg = MRI.createVirtualRegister(AddrRegClass);
11992 BuildMI(overflowMBB, DL, TII->get(X86::MOV64rm), OverflowAddrReg)
11997 .addOperand(Segment)
11998 .setMemRefs(MMOBegin, MMOEnd);
12000 // If we need to align it, do so. Otherwise, just copy the address
12001 // to OverflowDestReg.
12003 // Align the overflow address
12004 assert((Align & (Align-1)) == 0 && "Alignment must be a power of 2");
12005 unsigned TmpReg = MRI.createVirtualRegister(AddrRegClass);
12007 // aligned_addr = (addr + (align-1)) & ~(align-1)
12008 BuildMI(overflowMBB, DL, TII->get(X86::ADD64ri32), TmpReg)
12009 .addReg(OverflowAddrReg)
12012 BuildMI(overflowMBB, DL, TII->get(X86::AND64ri32), OverflowDestReg)
12014 .addImm(~(uint64_t)(Align-1));
12016 BuildMI(overflowMBB, DL, TII->get(TargetOpcode::COPY), OverflowDestReg)
12017 .addReg(OverflowAddrReg);
12020 // Compute the next overflow address after this argument.
12021 // (the overflow address should be kept 8-byte aligned)
12022 unsigned NextAddrReg = MRI.createVirtualRegister(AddrRegClass);
12023 BuildMI(overflowMBB, DL, TII->get(X86::ADD64ri32), NextAddrReg)
12024 .addReg(OverflowDestReg)
12025 .addImm(ArgSizeA8);
12027 // Store the new overflow address.
12028 BuildMI(overflowMBB, DL, TII->get(X86::MOV64mr))
12033 .addOperand(Segment)
12034 .addReg(NextAddrReg)
12035 .setMemRefs(MMOBegin, MMOEnd);
12037 // If we branched, emit the PHI to the front of endMBB.
12039 BuildMI(*endMBB, endMBB->begin(), DL,
12040 TII->get(X86::PHI), DestReg)
12041 .addReg(OffsetDestReg).addMBB(offsetMBB)
12042 .addReg(OverflowDestReg).addMBB(overflowMBB);
12045 // Erase the pseudo instruction
12046 MI->eraseFromParent();
12051 MachineBasicBlock *
12052 X86TargetLowering::EmitVAStartSaveXMMRegsWithCustomInserter(
12054 MachineBasicBlock *MBB) const {
12055 // Emit code to save XMM registers to the stack. The ABI says that the
12056 // number of registers to save is given in %al, so it's theoretically
12057 // possible to do an indirect jump trick to avoid saving all of them,
12058 // however this code takes a simpler approach and just executes all
12059 // of the stores if %al is non-zero. It's less code, and it's probably
12060 // easier on the hardware branch predictor, and stores aren't all that
12061 // expensive anyway.
12063 // Create the new basic blocks. One block contains all the XMM stores,
12064 // and one block is the final destination regardless of whether any
12065 // stores were performed.
12066 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
12067 MachineFunction *F = MBB->getParent();
12068 MachineFunction::iterator MBBIter = MBB;
12070 MachineBasicBlock *XMMSaveMBB = F->CreateMachineBasicBlock(LLVM_BB);
12071 MachineBasicBlock *EndMBB = F->CreateMachineBasicBlock(LLVM_BB);
12072 F->insert(MBBIter, XMMSaveMBB);
12073 F->insert(MBBIter, EndMBB);
12075 // Transfer the remainder of MBB and its successor edges to EndMBB.
12076 EndMBB->splice(EndMBB->begin(), MBB,
12077 llvm::next(MachineBasicBlock::iterator(MI)),
12079 EndMBB->transferSuccessorsAndUpdatePHIs(MBB);
12081 // The original block will now fall through to the XMM save block.
12082 MBB->addSuccessor(XMMSaveMBB);
12083 // The XMMSaveMBB will fall through to the end block.
12084 XMMSaveMBB->addSuccessor(EndMBB);
12086 // Now add the instructions.
12087 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
12088 DebugLoc DL = MI->getDebugLoc();
12090 unsigned CountReg = MI->getOperand(0).getReg();
12091 int64_t RegSaveFrameIndex = MI->getOperand(1).getImm();
12092 int64_t VarArgsFPOffset = MI->getOperand(2).getImm();
12094 if (!Subtarget->isTargetWin64()) {
12095 // If %al is 0, branch around the XMM save block.
12096 BuildMI(MBB, DL, TII->get(X86::TEST8rr)).addReg(CountReg).addReg(CountReg);
12097 BuildMI(MBB, DL, TII->get(X86::JE_4)).addMBB(EndMBB);
12098 MBB->addSuccessor(EndMBB);
12101 unsigned MOVOpc = Subtarget->hasAVX() ? X86::VMOVAPSmr : X86::MOVAPSmr;
12102 // In the XMM save block, save all the XMM argument registers.
12103 for (int i = 3, e = MI->getNumOperands(); i != e; ++i) {
12104 int64_t Offset = (i - 3) * 16 + VarArgsFPOffset;
12105 MachineMemOperand *MMO =
12106 F->getMachineMemOperand(
12107 MachinePointerInfo::getFixedStack(RegSaveFrameIndex, Offset),
12108 MachineMemOperand::MOStore,
12109 /*Size=*/16, /*Align=*/16);
12110 BuildMI(XMMSaveMBB, DL, TII->get(MOVOpc))
12111 .addFrameIndex(RegSaveFrameIndex)
12112 .addImm(/*Scale=*/1)
12113 .addReg(/*IndexReg=*/0)
12114 .addImm(/*Disp=*/Offset)
12115 .addReg(/*Segment=*/0)
12116 .addReg(MI->getOperand(i).getReg())
12117 .addMemOperand(MMO);
12120 MI->eraseFromParent(); // The pseudo instruction is gone now.
12125 // The EFLAGS operand of SelectItr might be missing a kill marker
12126 // because there were multiple uses of EFLAGS, and ISel didn't know
12127 // which to mark. Figure out whether SelectItr should have had a
12128 // kill marker, and set it if it should. Returns the correct kill
12130 static bool checkAndUpdateEFLAGSKill(MachineBasicBlock::iterator SelectItr,
12131 MachineBasicBlock* BB,
12132 const TargetRegisterInfo* TRI) {
12133 // Scan forward through BB for a use/def of EFLAGS.
12134 MachineBasicBlock::iterator miI(llvm::next(SelectItr));
12135 for (MachineBasicBlock::iterator miE = BB->end(); miI != miE; ++miI) {
12136 const MachineInstr& mi = *miI;
12137 if (mi.readsRegister(X86::EFLAGS))
12139 if (mi.definesRegister(X86::EFLAGS))
12140 break; // Should have kill-flag - update below.
12143 // If we hit the end of the block, check whether EFLAGS is live into a
12145 if (miI == BB->end()) {
12146 for (MachineBasicBlock::succ_iterator sItr = BB->succ_begin(),
12147 sEnd = BB->succ_end();
12148 sItr != sEnd; ++sItr) {
12149 MachineBasicBlock* succ = *sItr;
12150 if (succ->isLiveIn(X86::EFLAGS))
12155 // We found a def, or hit the end of the basic block and EFLAGS wasn't live
12156 // out. SelectMI should have a kill flag on EFLAGS.
12157 SelectItr->addRegisterKilled(X86::EFLAGS, TRI);
12161 MachineBasicBlock *
12162 X86TargetLowering::EmitLoweredSelect(MachineInstr *MI,
12163 MachineBasicBlock *BB) const {
12164 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
12165 DebugLoc DL = MI->getDebugLoc();
12167 // To "insert" a SELECT_CC instruction, we actually have to insert the
12168 // diamond control-flow pattern. The incoming instruction knows the
12169 // destination vreg to set, the condition code register to branch on, the
12170 // true/false values to select between, and a branch opcode to use.
12171 const BasicBlock *LLVM_BB = BB->getBasicBlock();
12172 MachineFunction::iterator It = BB;
12178 // cmpTY ccX, r1, r2
12180 // fallthrough --> copy0MBB
12181 MachineBasicBlock *thisMBB = BB;
12182 MachineFunction *F = BB->getParent();
12183 MachineBasicBlock *copy0MBB = F->CreateMachineBasicBlock(LLVM_BB);
12184 MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB);
12185 F->insert(It, copy0MBB);
12186 F->insert(It, sinkMBB);
12188 // If the EFLAGS register isn't dead in the terminator, then claim that it's
12189 // live into the sink and copy blocks.
12190 const TargetRegisterInfo* TRI = getTargetMachine().getRegisterInfo();
12191 if (!MI->killsRegister(X86::EFLAGS) &&
12192 !checkAndUpdateEFLAGSKill(MI, BB, TRI)) {
12193 copy0MBB->addLiveIn(X86::EFLAGS);
12194 sinkMBB->addLiveIn(X86::EFLAGS);
12197 // Transfer the remainder of BB and its successor edges to sinkMBB.
12198 sinkMBB->splice(sinkMBB->begin(), BB,
12199 llvm::next(MachineBasicBlock::iterator(MI)),
12201 sinkMBB->transferSuccessorsAndUpdatePHIs(BB);
12203 // Add the true and fallthrough blocks as its successors.
12204 BB->addSuccessor(copy0MBB);
12205 BB->addSuccessor(sinkMBB);
12207 // Create the conditional branch instruction.
12209 X86::GetCondBranchFromCond((X86::CondCode)MI->getOperand(3).getImm());
12210 BuildMI(BB, DL, TII->get(Opc)).addMBB(sinkMBB);
12213 // %FalseValue = ...
12214 // # fallthrough to sinkMBB
12215 copy0MBB->addSuccessor(sinkMBB);
12218 // %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
12220 BuildMI(*sinkMBB, sinkMBB->begin(), DL,
12221 TII->get(X86::PHI), MI->getOperand(0).getReg())
12222 .addReg(MI->getOperand(1).getReg()).addMBB(copy0MBB)
12223 .addReg(MI->getOperand(2).getReg()).addMBB(thisMBB);
12225 MI->eraseFromParent(); // The pseudo instruction is gone now.
12229 MachineBasicBlock *
12230 X86TargetLowering::EmitLoweredSegAlloca(MachineInstr *MI, MachineBasicBlock *BB,
12231 bool Is64Bit) const {
12232 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
12233 DebugLoc DL = MI->getDebugLoc();
12234 MachineFunction *MF = BB->getParent();
12235 const BasicBlock *LLVM_BB = BB->getBasicBlock();
12237 assert(getTargetMachine().Options.EnableSegmentedStacks);
12239 unsigned TlsReg = Is64Bit ? X86::FS : X86::GS;
12240 unsigned TlsOffset = Is64Bit ? 0x70 : 0x30;
12243 // ... [Till the alloca]
12244 // If stacklet is not large enough, jump to mallocMBB
12247 // Allocate by subtracting from RSP
12248 // Jump to continueMBB
12251 // Allocate by call to runtime
12255 // [rest of original BB]
12258 MachineBasicBlock *mallocMBB = MF->CreateMachineBasicBlock(LLVM_BB);
12259 MachineBasicBlock *bumpMBB = MF->CreateMachineBasicBlock(LLVM_BB);
12260 MachineBasicBlock *continueMBB = MF->CreateMachineBasicBlock(LLVM_BB);
12262 MachineRegisterInfo &MRI = MF->getRegInfo();
12263 const TargetRegisterClass *AddrRegClass =
12264 getRegClassFor(Is64Bit ? MVT::i64:MVT::i32);
12266 unsigned mallocPtrVReg = MRI.createVirtualRegister(AddrRegClass),
12267 bumpSPPtrVReg = MRI.createVirtualRegister(AddrRegClass),
12268 tmpSPVReg = MRI.createVirtualRegister(AddrRegClass),
12269 SPLimitVReg = MRI.createVirtualRegister(AddrRegClass),
12270 sizeVReg = MI->getOperand(1).getReg(),
12271 physSPReg = Is64Bit ? X86::RSP : X86::ESP;
12273 MachineFunction::iterator MBBIter = BB;
12276 MF->insert(MBBIter, bumpMBB);
12277 MF->insert(MBBIter, mallocMBB);
12278 MF->insert(MBBIter, continueMBB);
12280 continueMBB->splice(continueMBB->begin(), BB, llvm::next
12281 (MachineBasicBlock::iterator(MI)), BB->end());
12282 continueMBB->transferSuccessorsAndUpdatePHIs(BB);
12284 // Add code to the main basic block to check if the stack limit has been hit,
12285 // and if so, jump to mallocMBB otherwise to bumpMBB.
12286 BuildMI(BB, DL, TII->get(TargetOpcode::COPY), tmpSPVReg).addReg(physSPReg);
12287 BuildMI(BB, DL, TII->get(Is64Bit ? X86::SUB64rr:X86::SUB32rr), SPLimitVReg)
12288 .addReg(tmpSPVReg).addReg(sizeVReg);
12289 BuildMI(BB, DL, TII->get(Is64Bit ? X86::CMP64mr:X86::CMP32mr))
12290 .addReg(0).addImm(1).addReg(0).addImm(TlsOffset).addReg(TlsReg)
12291 .addReg(SPLimitVReg);
12292 BuildMI(BB, DL, TII->get(X86::JG_4)).addMBB(mallocMBB);
12294 // bumpMBB simply decreases the stack pointer, since we know the current
12295 // stacklet has enough space.
12296 BuildMI(bumpMBB, DL, TII->get(TargetOpcode::COPY), physSPReg)
12297 .addReg(SPLimitVReg);
12298 BuildMI(bumpMBB, DL, TII->get(TargetOpcode::COPY), bumpSPPtrVReg)
12299 .addReg(SPLimitVReg);
12300 BuildMI(bumpMBB, DL, TII->get(X86::JMP_4)).addMBB(continueMBB);
12302 // Calls into a routine in libgcc to allocate more space from the heap.
12303 const uint32_t *RegMask =
12304 getTargetMachine().getRegisterInfo()->getCallPreservedMask(CallingConv::C);
12306 BuildMI(mallocMBB, DL, TII->get(X86::MOV64rr), X86::RDI)
12308 BuildMI(mallocMBB, DL, TII->get(X86::CALL64pcrel32))
12309 .addExternalSymbol("__morestack_allocate_stack_space").addReg(X86::RDI)
12310 .addRegMask(RegMask)
12311 .addReg(X86::RAX, RegState::ImplicitDefine);
12313 BuildMI(mallocMBB, DL, TII->get(X86::SUB32ri), physSPReg).addReg(physSPReg)
12315 BuildMI(mallocMBB, DL, TII->get(X86::PUSH32r)).addReg(sizeVReg);
12316 BuildMI(mallocMBB, DL, TII->get(X86::CALLpcrel32))
12317 .addExternalSymbol("__morestack_allocate_stack_space")
12318 .addRegMask(RegMask)
12319 .addReg(X86::EAX, RegState::ImplicitDefine);
12323 BuildMI(mallocMBB, DL, TII->get(X86::ADD32ri), physSPReg).addReg(physSPReg)
12326 BuildMI(mallocMBB, DL, TII->get(TargetOpcode::COPY), mallocPtrVReg)
12327 .addReg(Is64Bit ? X86::RAX : X86::EAX);
12328 BuildMI(mallocMBB, DL, TII->get(X86::JMP_4)).addMBB(continueMBB);
12330 // Set up the CFG correctly.
12331 BB->addSuccessor(bumpMBB);
12332 BB->addSuccessor(mallocMBB);
12333 mallocMBB->addSuccessor(continueMBB);
12334 bumpMBB->addSuccessor(continueMBB);
12336 // Take care of the PHI nodes.
12337 BuildMI(*continueMBB, continueMBB->begin(), DL, TII->get(X86::PHI),
12338 MI->getOperand(0).getReg())
12339 .addReg(mallocPtrVReg).addMBB(mallocMBB)
12340 .addReg(bumpSPPtrVReg).addMBB(bumpMBB);
12342 // Delete the original pseudo instruction.
12343 MI->eraseFromParent();
12346 return continueMBB;
12349 MachineBasicBlock *
12350 X86TargetLowering::EmitLoweredWinAlloca(MachineInstr *MI,
12351 MachineBasicBlock *BB) const {
12352 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
12353 DebugLoc DL = MI->getDebugLoc();
12355 assert(!Subtarget->isTargetEnvMacho());
12357 // The lowering is pretty easy: we're just emitting the call to _alloca. The
12358 // non-trivial part is impdef of ESP.
12360 if (Subtarget->isTargetWin64()) {
12361 if (Subtarget->isTargetCygMing()) {
12362 // ___chkstk(Mingw64):
12363 // Clobbers R10, R11, RAX and EFLAGS.
12365 BuildMI(*BB, MI, DL, TII->get(X86::W64ALLOCA))
12366 .addExternalSymbol("___chkstk")
12367 .addReg(X86::RAX, RegState::Implicit)
12368 .addReg(X86::RSP, RegState::Implicit)
12369 .addReg(X86::RAX, RegState::Define | RegState::Implicit)
12370 .addReg(X86::RSP, RegState::Define | RegState::Implicit)
12371 .addReg(X86::EFLAGS, RegState::Define | RegState::Implicit);
12373 // __chkstk(MSVCRT): does not update stack pointer.
12374 // Clobbers R10, R11 and EFLAGS.
12375 // FIXME: RAX(allocated size) might be reused and not killed.
12376 BuildMI(*BB, MI, DL, TII->get(X86::W64ALLOCA))
12377 .addExternalSymbol("__chkstk")
12378 .addReg(X86::RAX, RegState::Implicit)
12379 .addReg(X86::EFLAGS, RegState::Define | RegState::Implicit);
12380 // RAX has the offset to subtracted from RSP.
12381 BuildMI(*BB, MI, DL, TII->get(X86::SUB64rr), X86::RSP)
12386 const char *StackProbeSymbol =
12387 Subtarget->isTargetWindows() ? "_chkstk" : "_alloca";
12389 BuildMI(*BB, MI, DL, TII->get(X86::CALLpcrel32))
12390 .addExternalSymbol(StackProbeSymbol)
12391 .addReg(X86::EAX, RegState::Implicit)
12392 .addReg(X86::ESP, RegState::Implicit)
12393 .addReg(X86::EAX, RegState::Define | RegState::Implicit)
12394 .addReg(X86::ESP, RegState::Define | RegState::Implicit)
12395 .addReg(X86::EFLAGS, RegState::Define | RegState::Implicit);
12398 MI->eraseFromParent(); // The pseudo instruction is gone now.
12402 MachineBasicBlock *
12403 X86TargetLowering::EmitLoweredTLSCall(MachineInstr *MI,
12404 MachineBasicBlock *BB) const {
12405 // This is pretty easy. We're taking the value that we received from
12406 // our load from the relocation, sticking it in either RDI (x86-64)
12407 // or EAX and doing an indirect call. The return value will then
12408 // be in the normal return register.
12409 const X86InstrInfo *TII
12410 = static_cast<const X86InstrInfo*>(getTargetMachine().getInstrInfo());
12411 DebugLoc DL = MI->getDebugLoc();
12412 MachineFunction *F = BB->getParent();
12414 assert(Subtarget->isTargetDarwin() && "Darwin only instr emitted?");
12415 assert(MI->getOperand(3).isGlobal() && "This should be a global");
12417 // Get a register mask for the lowered call.
12418 // FIXME: The 32-bit calls have non-standard calling conventions. Use a
12419 // proper register mask.
12420 const uint32_t *RegMask =
12421 getTargetMachine().getRegisterInfo()->getCallPreservedMask(CallingConv::C);
12422 if (Subtarget->is64Bit()) {
12423 MachineInstrBuilder MIB = BuildMI(*BB, MI, DL,
12424 TII->get(X86::MOV64rm), X86::RDI)
12426 .addImm(0).addReg(0)
12427 .addGlobalAddress(MI->getOperand(3).getGlobal(), 0,
12428 MI->getOperand(3).getTargetFlags())
12430 MIB = BuildMI(*BB, MI, DL, TII->get(X86::CALL64m));
12431 addDirectMem(MIB, X86::RDI);
12432 MIB.addReg(X86::RAX, RegState::ImplicitDefine).addRegMask(RegMask);
12433 } else if (getTargetMachine().getRelocationModel() != Reloc::PIC_) {
12434 MachineInstrBuilder MIB = BuildMI(*BB, MI, DL,
12435 TII->get(X86::MOV32rm), X86::EAX)
12437 .addImm(0).addReg(0)
12438 .addGlobalAddress(MI->getOperand(3).getGlobal(), 0,
12439 MI->getOperand(3).getTargetFlags())
12441 MIB = BuildMI(*BB, MI, DL, TII->get(X86::CALL32m));
12442 addDirectMem(MIB, X86::EAX);
12443 MIB.addReg(X86::EAX, RegState::ImplicitDefine).addRegMask(RegMask);
12445 MachineInstrBuilder MIB = BuildMI(*BB, MI, DL,
12446 TII->get(X86::MOV32rm), X86::EAX)
12447 .addReg(TII->getGlobalBaseReg(F))
12448 .addImm(0).addReg(0)
12449 .addGlobalAddress(MI->getOperand(3).getGlobal(), 0,
12450 MI->getOperand(3).getTargetFlags())
12452 MIB = BuildMI(*BB, MI, DL, TII->get(X86::CALL32m));
12453 addDirectMem(MIB, X86::EAX);
12454 MIB.addReg(X86::EAX, RegState::ImplicitDefine).addRegMask(RegMask);
12457 MI->eraseFromParent(); // The pseudo instruction is gone now.
12461 MachineBasicBlock *
12462 X86TargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
12463 MachineBasicBlock *BB) const {
12464 switch (MI->getOpcode()) {
12465 default: llvm_unreachable("Unexpected instr type to insert");
12466 case X86::TAILJMPd64:
12467 case X86::TAILJMPr64:
12468 case X86::TAILJMPm64:
12469 llvm_unreachable("TAILJMP64 would not be touched here.");
12470 case X86::TCRETURNdi64:
12471 case X86::TCRETURNri64:
12472 case X86::TCRETURNmi64:
12474 case X86::WIN_ALLOCA:
12475 return EmitLoweredWinAlloca(MI, BB);
12476 case X86::SEG_ALLOCA_32:
12477 return EmitLoweredSegAlloca(MI, BB, false);
12478 case X86::SEG_ALLOCA_64:
12479 return EmitLoweredSegAlloca(MI, BB, true);
12480 case X86::TLSCall_32:
12481 case X86::TLSCall_64:
12482 return EmitLoweredTLSCall(MI, BB);
12483 case X86::CMOV_GR8:
12484 case X86::CMOV_FR32:
12485 case X86::CMOV_FR64:
12486 case X86::CMOV_V4F32:
12487 case X86::CMOV_V2F64:
12488 case X86::CMOV_V2I64:
12489 case X86::CMOV_V8F32:
12490 case X86::CMOV_V4F64:
12491 case X86::CMOV_V4I64:
12492 case X86::CMOV_GR16:
12493 case X86::CMOV_GR32:
12494 case X86::CMOV_RFP32:
12495 case X86::CMOV_RFP64:
12496 case X86::CMOV_RFP80:
12497 return EmitLoweredSelect(MI, BB);
12499 case X86::FP32_TO_INT16_IN_MEM:
12500 case X86::FP32_TO_INT32_IN_MEM:
12501 case X86::FP32_TO_INT64_IN_MEM:
12502 case X86::FP64_TO_INT16_IN_MEM:
12503 case X86::FP64_TO_INT32_IN_MEM:
12504 case X86::FP64_TO_INT64_IN_MEM:
12505 case X86::FP80_TO_INT16_IN_MEM:
12506 case X86::FP80_TO_INT32_IN_MEM:
12507 case X86::FP80_TO_INT64_IN_MEM: {
12508 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
12509 DebugLoc DL = MI->getDebugLoc();
12511 // Change the floating point control register to use "round towards zero"
12512 // mode when truncating to an integer value.
12513 MachineFunction *F = BB->getParent();
12514 int CWFrameIdx = F->getFrameInfo()->CreateStackObject(2, 2, false);
12515 addFrameReference(BuildMI(*BB, MI, DL,
12516 TII->get(X86::FNSTCW16m)), CWFrameIdx);
12518 // Load the old value of the high byte of the control word...
12520 F->getRegInfo().createVirtualRegister(X86::GR16RegisterClass);
12521 addFrameReference(BuildMI(*BB, MI, DL, TII->get(X86::MOV16rm), OldCW),
12524 // Set the high part to be round to zero...
12525 addFrameReference(BuildMI(*BB, MI, DL, TII->get(X86::MOV16mi)), CWFrameIdx)
12528 // Reload the modified control word now...
12529 addFrameReference(BuildMI(*BB, MI, DL,
12530 TII->get(X86::FLDCW16m)), CWFrameIdx);
12532 // Restore the memory image of control word to original value
12533 addFrameReference(BuildMI(*BB, MI, DL, TII->get(X86::MOV16mr)), CWFrameIdx)
12536 // Get the X86 opcode to use.
12538 switch (MI->getOpcode()) {
12539 default: llvm_unreachable("illegal opcode!");
12540 case X86::FP32_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m32; break;
12541 case X86::FP32_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m32; break;
12542 case X86::FP32_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m32; break;
12543 case X86::FP64_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m64; break;
12544 case X86::FP64_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m64; break;
12545 case X86::FP64_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m64; break;
12546 case X86::FP80_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m80; break;
12547 case X86::FP80_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m80; break;
12548 case X86::FP80_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m80; break;
12552 MachineOperand &Op = MI->getOperand(0);
12554 AM.BaseType = X86AddressMode::RegBase;
12555 AM.Base.Reg = Op.getReg();
12557 AM.BaseType = X86AddressMode::FrameIndexBase;
12558 AM.Base.FrameIndex = Op.getIndex();
12560 Op = MI->getOperand(1);
12562 AM.Scale = Op.getImm();
12563 Op = MI->getOperand(2);
12565 AM.IndexReg = Op.getImm();
12566 Op = MI->getOperand(3);
12567 if (Op.isGlobal()) {
12568 AM.GV = Op.getGlobal();
12570 AM.Disp = Op.getImm();
12572 addFullAddress(BuildMI(*BB, MI, DL, TII->get(Opc)), AM)
12573 .addReg(MI->getOperand(X86::AddrNumOperands).getReg());
12575 // Reload the original control word now.
12576 addFrameReference(BuildMI(*BB, MI, DL,
12577 TII->get(X86::FLDCW16m)), CWFrameIdx);
12579 MI->eraseFromParent(); // The pseudo instruction is gone now.
12582 // String/text processing lowering.
12583 case X86::PCMPISTRM128REG:
12584 case X86::VPCMPISTRM128REG:
12585 return EmitPCMP(MI, BB, 3, false /* in-mem */);
12586 case X86::PCMPISTRM128MEM:
12587 case X86::VPCMPISTRM128MEM:
12588 return EmitPCMP(MI, BB, 3, true /* in-mem */);
12589 case X86::PCMPESTRM128REG:
12590 case X86::VPCMPESTRM128REG:
12591 return EmitPCMP(MI, BB, 5, false /* in mem */);
12592 case X86::PCMPESTRM128MEM:
12593 case X86::VPCMPESTRM128MEM:
12594 return EmitPCMP(MI, BB, 5, true /* in mem */);
12596 // Thread synchronization.
12598 return EmitMonitor(MI, BB);
12600 return EmitMwait(MI, BB);
12602 // Atomic Lowering.
12603 case X86::ATOMAND32:
12604 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND32rr,
12605 X86::AND32ri, X86::MOV32rm,
12607 X86::NOT32r, X86::EAX,
12608 X86::GR32RegisterClass);
12609 case X86::ATOMOR32:
12610 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::OR32rr,
12611 X86::OR32ri, X86::MOV32rm,
12613 X86::NOT32r, X86::EAX,
12614 X86::GR32RegisterClass);
12615 case X86::ATOMXOR32:
12616 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::XOR32rr,
12617 X86::XOR32ri, X86::MOV32rm,
12619 X86::NOT32r, X86::EAX,
12620 X86::GR32RegisterClass);
12621 case X86::ATOMNAND32:
12622 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND32rr,
12623 X86::AND32ri, X86::MOV32rm,
12625 X86::NOT32r, X86::EAX,
12626 X86::GR32RegisterClass, true);
12627 case X86::ATOMMIN32:
12628 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVL32rr);
12629 case X86::ATOMMAX32:
12630 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVG32rr);
12631 case X86::ATOMUMIN32:
12632 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVB32rr);
12633 case X86::ATOMUMAX32:
12634 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVA32rr);
12636 case X86::ATOMAND16:
12637 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND16rr,
12638 X86::AND16ri, X86::MOV16rm,
12640 X86::NOT16r, X86::AX,
12641 X86::GR16RegisterClass);
12642 case X86::ATOMOR16:
12643 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::OR16rr,
12644 X86::OR16ri, X86::MOV16rm,
12646 X86::NOT16r, X86::AX,
12647 X86::GR16RegisterClass);
12648 case X86::ATOMXOR16:
12649 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::XOR16rr,
12650 X86::XOR16ri, X86::MOV16rm,
12652 X86::NOT16r, X86::AX,
12653 X86::GR16RegisterClass);
12654 case X86::ATOMNAND16:
12655 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND16rr,
12656 X86::AND16ri, X86::MOV16rm,
12658 X86::NOT16r, X86::AX,
12659 X86::GR16RegisterClass, true);
12660 case X86::ATOMMIN16:
12661 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVL16rr);
12662 case X86::ATOMMAX16:
12663 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVG16rr);
12664 case X86::ATOMUMIN16:
12665 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVB16rr);
12666 case X86::ATOMUMAX16:
12667 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVA16rr);
12669 case X86::ATOMAND8:
12670 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND8rr,
12671 X86::AND8ri, X86::MOV8rm,
12673 X86::NOT8r, X86::AL,
12674 X86::GR8RegisterClass);
12676 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::OR8rr,
12677 X86::OR8ri, X86::MOV8rm,
12679 X86::NOT8r, X86::AL,
12680 X86::GR8RegisterClass);
12681 case X86::ATOMXOR8:
12682 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::XOR8rr,
12683 X86::XOR8ri, X86::MOV8rm,
12685 X86::NOT8r, X86::AL,
12686 X86::GR8RegisterClass);
12687 case X86::ATOMNAND8:
12688 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND8rr,
12689 X86::AND8ri, X86::MOV8rm,
12691 X86::NOT8r, X86::AL,
12692 X86::GR8RegisterClass, true);
12693 // FIXME: There are no CMOV8 instructions; MIN/MAX need some other way.
12694 // This group is for 64-bit host.
12695 case X86::ATOMAND64:
12696 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND64rr,
12697 X86::AND64ri32, X86::MOV64rm,
12699 X86::NOT64r, X86::RAX,
12700 X86::GR64RegisterClass);
12701 case X86::ATOMOR64:
12702 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::OR64rr,
12703 X86::OR64ri32, X86::MOV64rm,
12705 X86::NOT64r, X86::RAX,
12706 X86::GR64RegisterClass);
12707 case X86::ATOMXOR64:
12708 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::XOR64rr,
12709 X86::XOR64ri32, X86::MOV64rm,
12711 X86::NOT64r, X86::RAX,
12712 X86::GR64RegisterClass);
12713 case X86::ATOMNAND64:
12714 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND64rr,
12715 X86::AND64ri32, X86::MOV64rm,
12717 X86::NOT64r, X86::RAX,
12718 X86::GR64RegisterClass, true);
12719 case X86::ATOMMIN64:
12720 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVL64rr);
12721 case X86::ATOMMAX64:
12722 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVG64rr);
12723 case X86::ATOMUMIN64:
12724 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVB64rr);
12725 case X86::ATOMUMAX64:
12726 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVA64rr);
12728 // This group does 64-bit operations on a 32-bit host.
12729 case X86::ATOMAND6432:
12730 return EmitAtomicBit6432WithCustomInserter(MI, BB,
12731 X86::AND32rr, X86::AND32rr,
12732 X86::AND32ri, X86::AND32ri,
12734 case X86::ATOMOR6432:
12735 return EmitAtomicBit6432WithCustomInserter(MI, BB,
12736 X86::OR32rr, X86::OR32rr,
12737 X86::OR32ri, X86::OR32ri,
12739 case X86::ATOMXOR6432:
12740 return EmitAtomicBit6432WithCustomInserter(MI, BB,
12741 X86::XOR32rr, X86::XOR32rr,
12742 X86::XOR32ri, X86::XOR32ri,
12744 case X86::ATOMNAND6432:
12745 return EmitAtomicBit6432WithCustomInserter(MI, BB,
12746 X86::AND32rr, X86::AND32rr,
12747 X86::AND32ri, X86::AND32ri,
12749 case X86::ATOMADD6432:
12750 return EmitAtomicBit6432WithCustomInserter(MI, BB,
12751 X86::ADD32rr, X86::ADC32rr,
12752 X86::ADD32ri, X86::ADC32ri,
12754 case X86::ATOMSUB6432:
12755 return EmitAtomicBit6432WithCustomInserter(MI, BB,
12756 X86::SUB32rr, X86::SBB32rr,
12757 X86::SUB32ri, X86::SBB32ri,
12759 case X86::ATOMSWAP6432:
12760 return EmitAtomicBit6432WithCustomInserter(MI, BB,
12761 X86::MOV32rr, X86::MOV32rr,
12762 X86::MOV32ri, X86::MOV32ri,
12764 case X86::VASTART_SAVE_XMM_REGS:
12765 return EmitVAStartSaveXMMRegsWithCustomInserter(MI, BB);
12767 case X86::VAARG_64:
12768 return EmitVAARG64WithCustomInserter(MI, BB);
12772 //===----------------------------------------------------------------------===//
12773 // X86 Optimization Hooks
12774 //===----------------------------------------------------------------------===//
12776 void X86TargetLowering::computeMaskedBitsForTargetNode(const SDValue Op,
12779 const SelectionDAG &DAG,
12780 unsigned Depth) const {
12781 unsigned BitWidth = KnownZero.getBitWidth();
12782 unsigned Opc = Op.getOpcode();
12783 assert((Opc >= ISD::BUILTIN_OP_END ||
12784 Opc == ISD::INTRINSIC_WO_CHAIN ||
12785 Opc == ISD::INTRINSIC_W_CHAIN ||
12786 Opc == ISD::INTRINSIC_VOID) &&
12787 "Should use MaskedValueIsZero if you don't know whether Op"
12788 " is a target node!");
12790 KnownZero = KnownOne = APInt(BitWidth, 0); // Don't know anything.
12804 // These nodes' second result is a boolean.
12805 if (Op.getResNo() == 0)
12808 case X86ISD::SETCC:
12809 KnownZero |= APInt::getHighBitsSet(BitWidth, BitWidth - 1);
12811 case ISD::INTRINSIC_WO_CHAIN: {
12812 unsigned IntId = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
12813 unsigned NumLoBits = 0;
12816 case Intrinsic::x86_sse_movmsk_ps:
12817 case Intrinsic::x86_avx_movmsk_ps_256:
12818 case Intrinsic::x86_sse2_movmsk_pd:
12819 case Intrinsic::x86_avx_movmsk_pd_256:
12820 case Intrinsic::x86_mmx_pmovmskb:
12821 case Intrinsic::x86_sse2_pmovmskb_128:
12822 case Intrinsic::x86_avx2_pmovmskb: {
12823 // High bits of movmskp{s|d}, pmovmskb are known zero.
12825 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
12826 case Intrinsic::x86_sse_movmsk_ps: NumLoBits = 4; break;
12827 case Intrinsic::x86_avx_movmsk_ps_256: NumLoBits = 8; break;
12828 case Intrinsic::x86_sse2_movmsk_pd: NumLoBits = 2; break;
12829 case Intrinsic::x86_avx_movmsk_pd_256: NumLoBits = 4; break;
12830 case Intrinsic::x86_mmx_pmovmskb: NumLoBits = 8; break;
12831 case Intrinsic::x86_sse2_pmovmskb_128: NumLoBits = 16; break;
12832 case Intrinsic::x86_avx2_pmovmskb: NumLoBits = 32; break;
12834 KnownZero = APInt::getHighBitsSet(BitWidth, BitWidth - NumLoBits);
12843 unsigned X86TargetLowering::ComputeNumSignBitsForTargetNode(SDValue Op,
12844 unsigned Depth) const {
12845 // SETCC_CARRY sets the dest to ~0 for true or 0 for false.
12846 if (Op.getOpcode() == X86ISD::SETCC_CARRY)
12847 return Op.getValueType().getScalarType().getSizeInBits();
12853 /// isGAPlusOffset - Returns true (and the GlobalValue and the offset) if the
12854 /// node is a GlobalAddress + offset.
12855 bool X86TargetLowering::isGAPlusOffset(SDNode *N,
12856 const GlobalValue* &GA,
12857 int64_t &Offset) const {
12858 if (N->getOpcode() == X86ISD::Wrapper) {
12859 if (isa<GlobalAddressSDNode>(N->getOperand(0))) {
12860 GA = cast<GlobalAddressSDNode>(N->getOperand(0))->getGlobal();
12861 Offset = cast<GlobalAddressSDNode>(N->getOperand(0))->getOffset();
12865 return TargetLowering::isGAPlusOffset(N, GA, Offset);
12868 /// isShuffleHigh128VectorInsertLow - Checks whether the shuffle node is the
12869 /// same as extracting the high 128-bit part of 256-bit vector and then
12870 /// inserting the result into the low part of a new 256-bit vector
12871 static bool isShuffleHigh128VectorInsertLow(ShuffleVectorSDNode *SVOp) {
12872 EVT VT = SVOp->getValueType(0);
12873 int NumElems = VT.getVectorNumElements();
12875 // vector_shuffle <4, 5, 6, 7, u, u, u, u> or <2, 3, u, u>
12876 for (int i = 0, j = NumElems/2; i < NumElems/2; ++i, ++j)
12877 if (!isUndefOrEqual(SVOp->getMaskElt(i), j) ||
12878 SVOp->getMaskElt(j) >= 0)
12884 /// isShuffleLow128VectorInsertHigh - Checks whether the shuffle node is the
12885 /// same as extracting the low 128-bit part of 256-bit vector and then
12886 /// inserting the result into the high part of a new 256-bit vector
12887 static bool isShuffleLow128VectorInsertHigh(ShuffleVectorSDNode *SVOp) {
12888 EVT VT = SVOp->getValueType(0);
12889 int NumElems = VT.getVectorNumElements();
12891 // vector_shuffle <u, u, u, u, 0, 1, 2, 3> or <u, u, 0, 1>
12892 for (int i = NumElems/2, j = 0; i < NumElems; ++i, ++j)
12893 if (!isUndefOrEqual(SVOp->getMaskElt(i), j) ||
12894 SVOp->getMaskElt(j) >= 0)
12900 /// PerformShuffleCombine256 - Performs shuffle combines for 256-bit vectors.
12901 static SDValue PerformShuffleCombine256(SDNode *N, SelectionDAG &DAG,
12902 TargetLowering::DAGCombinerInfo &DCI,
12903 const X86Subtarget* Subtarget) {
12904 DebugLoc dl = N->getDebugLoc();
12905 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);
12906 SDValue V1 = SVOp->getOperand(0);
12907 SDValue V2 = SVOp->getOperand(1);
12908 EVT VT = SVOp->getValueType(0);
12909 int NumElems = VT.getVectorNumElements();
12911 if (V1.getOpcode() == ISD::CONCAT_VECTORS &&
12912 V2.getOpcode() == ISD::CONCAT_VECTORS) {
12916 // V UNDEF BUILD_VECTOR UNDEF
12918 // CONCAT_VECTOR CONCAT_VECTOR
12921 // RESULT: V + zero extended
12923 if (V2.getOperand(0).getOpcode() != ISD::BUILD_VECTOR ||
12924 V2.getOperand(1).getOpcode() != ISD::UNDEF ||
12925 V1.getOperand(1).getOpcode() != ISD::UNDEF)
12928 if (!ISD::isBuildVectorAllZeros(V2.getOperand(0).getNode()))
12931 // To match the shuffle mask, the first half of the mask should
12932 // be exactly the first vector, and all the rest a splat with the
12933 // first element of the second one.
12934 for (int i = 0; i < NumElems/2; ++i)
12935 if (!isUndefOrEqual(SVOp->getMaskElt(i), i) ||
12936 !isUndefOrEqual(SVOp->getMaskElt(i+NumElems/2), NumElems))
12939 // If V1 is coming from a vector load then just fold to a VZEXT_LOAD.
12940 if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(V1.getOperand(0))) {
12941 SDVTList Tys = DAG.getVTList(MVT::v4i64, MVT::Other);
12942 SDValue Ops[] = { Ld->getChain(), Ld->getBasePtr() };
12944 DAG.getMemIntrinsicNode(X86ISD::VZEXT_LOAD, dl, Tys, Ops, 2,
12946 Ld->getPointerInfo(),
12947 Ld->getAlignment(),
12948 false/*isVolatile*/, true/*ReadMem*/,
12949 false/*WriteMem*/);
12950 return DAG.getNode(ISD::BITCAST, dl, VT, ResNode);
12953 // Emit a zeroed vector and insert the desired subvector on its
12955 SDValue Zeros = getZeroVector(VT, Subtarget, DAG, dl);
12956 SDValue InsV = Insert128BitVector(Zeros, V1.getOperand(0),
12957 DAG.getConstant(0, MVT::i32), DAG, dl);
12958 return DCI.CombineTo(N, InsV);
12961 //===--------------------------------------------------------------------===//
12962 // Combine some shuffles into subvector extracts and inserts:
12965 // vector_shuffle <4, 5, 6, 7, u, u, u, u> or <2, 3, u, u>
12966 if (isShuffleHigh128VectorInsertLow(SVOp)) {
12967 SDValue V = Extract128BitVector(V1, DAG.getConstant(NumElems/2, MVT::i32),
12969 SDValue InsV = Insert128BitVector(DAG.getNode(ISD::UNDEF, dl, VT),
12970 V, DAG.getConstant(0, MVT::i32), DAG, dl);
12971 return DCI.CombineTo(N, InsV);
12974 // vector_shuffle <u, u, u, u, 0, 1, 2, 3> or <u, u, 0, 1>
12975 if (isShuffleLow128VectorInsertHigh(SVOp)) {
12976 SDValue V = Extract128BitVector(V1, DAG.getConstant(0, MVT::i32), DAG, dl);
12977 SDValue InsV = Insert128BitVector(DAG.getNode(ISD::UNDEF, dl, VT),
12978 V, DAG.getConstant(NumElems/2, MVT::i32), DAG, dl);
12979 return DCI.CombineTo(N, InsV);
12985 /// PerformShuffleCombine - Performs several different shuffle combines.
12986 static SDValue PerformShuffleCombine(SDNode *N, SelectionDAG &DAG,
12987 TargetLowering::DAGCombinerInfo &DCI,
12988 const X86Subtarget *Subtarget) {
12989 DebugLoc dl = N->getDebugLoc();
12990 EVT VT = N->getValueType(0);
12992 // Don't create instructions with illegal types after legalize types has run.
12993 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
12994 if (!DCI.isBeforeLegalize() && !TLI.isTypeLegal(VT.getVectorElementType()))
12997 // Combine 256-bit vector shuffles. This is only profitable when in AVX mode
12998 if (Subtarget->hasAVX() && VT.getSizeInBits() == 256 &&
12999 N->getOpcode() == ISD::VECTOR_SHUFFLE)
13000 return PerformShuffleCombine256(N, DAG, DCI, Subtarget);
13002 // Only handle 128 wide vector from here on.
13003 if (VT.getSizeInBits() != 128)
13006 // Combine a vector_shuffle that is equal to build_vector load1, load2, load3,
13007 // load4, <0, 1, 2, 3> into a 128-bit load if the load addresses are
13008 // consecutive, non-overlapping, and in the right order.
13009 SmallVector<SDValue, 16> Elts;
13010 for (unsigned i = 0, e = VT.getVectorNumElements(); i != e; ++i)
13011 Elts.push_back(getShuffleScalarElt(N, i, DAG, 0));
13013 return EltsFromConsecutiveLoads(VT, Elts, dl, DAG);
13017 /// PerformTruncateCombine - Converts truncate operation to
13018 /// a sequence of vector shuffle operations.
13019 /// It is possible when we truncate 256-bit vector to 128-bit vector
13021 SDValue X86TargetLowering::PerformTruncateCombine(SDNode *N, SelectionDAG &DAG,
13022 DAGCombinerInfo &DCI) const {
13023 if (!DCI.isBeforeLegalizeOps())
13026 if (!Subtarget->hasAVX()) return SDValue();
13028 EVT VT = N->getValueType(0);
13029 SDValue Op = N->getOperand(0);
13030 EVT OpVT = Op.getValueType();
13031 DebugLoc dl = N->getDebugLoc();
13033 if ((VT == MVT::v4i32) && (OpVT == MVT::v4i64)) {
13035 SDValue OpLo = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v2i64, Op,
13036 DAG.getIntPtrConstant(0));
13038 SDValue OpHi = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v2i64, Op,
13039 DAG.getIntPtrConstant(2));
13041 OpLo = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, OpLo);
13042 OpHi = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, OpHi);
13045 int ShufMask1[] = {0, 2, 0, 0};
13047 OpLo = DAG.getVectorShuffle(VT, dl, OpLo, DAG.getUNDEF(VT),
13049 OpHi = DAG.getVectorShuffle(VT, dl, OpHi, DAG.getUNDEF(VT),
13053 int ShufMask2[] = {0, 1, 4, 5};
13055 return DAG.getVectorShuffle(VT, dl, OpLo, OpHi, ShufMask2);
13057 if ((VT == MVT::v8i16) && (OpVT == MVT::v8i32)) {
13059 SDValue OpLo = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i32, Op,
13060 DAG.getIntPtrConstant(0));
13062 SDValue OpHi = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i32, Op,
13063 DAG.getIntPtrConstant(4));
13065 OpLo = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, OpLo);
13066 OpHi = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, OpHi);
13069 int ShufMask1[] = {0, 1, 4, 5, 8, 9, 12, 13,
13070 -1, -1, -1, -1, -1, -1, -1, -1};
13072 OpLo = DAG.getVectorShuffle(MVT::v16i8, dl, OpLo,
13073 DAG.getUNDEF(MVT::v16i8),
13075 OpHi = DAG.getVectorShuffle(MVT::v16i8, dl, OpHi,
13076 DAG.getUNDEF(MVT::v16i8),
13079 OpLo = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, OpLo);
13080 OpHi = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, OpHi);
13083 int ShufMask2[] = {0, 1, 4, 5};
13085 SDValue res = DAG.getVectorShuffle(MVT::v4i32, dl, OpLo, OpHi, ShufMask2);
13086 return DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, res);
13092 /// XFormVExtractWithShuffleIntoLoad - Check if a vector extract from a target
13093 /// specific shuffle of a load can be folded into a single element load.
13094 /// Similar handling for VECTOR_SHUFFLE is performed by DAGCombiner, but
13095 /// shuffles have been customed lowered so we need to handle those here.
13096 static SDValue XFormVExtractWithShuffleIntoLoad(SDNode *N, SelectionDAG &DAG,
13097 TargetLowering::DAGCombinerInfo &DCI) {
13098 if (DCI.isBeforeLegalizeOps())
13101 SDValue InVec = N->getOperand(0);
13102 SDValue EltNo = N->getOperand(1);
13104 if (!isa<ConstantSDNode>(EltNo))
13107 EVT VT = InVec.getValueType();
13109 bool HasShuffleIntoBitcast = false;
13110 if (InVec.getOpcode() == ISD::BITCAST) {
13111 // Don't duplicate a load with other uses.
13112 if (!InVec.hasOneUse())
13114 EVT BCVT = InVec.getOperand(0).getValueType();
13115 if (BCVT.getVectorNumElements() != VT.getVectorNumElements())
13117 InVec = InVec.getOperand(0);
13118 HasShuffleIntoBitcast = true;
13121 if (!isTargetShuffle(InVec.getOpcode()))
13124 // Don't duplicate a load with other uses.
13125 if (!InVec.hasOneUse())
13128 SmallVector<int, 16> ShuffleMask;
13130 if (!getTargetShuffleMask(InVec.getNode(), VT, ShuffleMask, UnaryShuffle))
13133 // Select the input vector, guarding against out of range extract vector.
13134 unsigned NumElems = VT.getVectorNumElements();
13135 int Elt = cast<ConstantSDNode>(EltNo)->getZExtValue();
13136 int Idx = (Elt > (int)NumElems) ? -1 : ShuffleMask[Elt];
13137 SDValue LdNode = (Idx < (int)NumElems) ? InVec.getOperand(0)
13138 : InVec.getOperand(1);
13140 // If inputs to shuffle are the same for both ops, then allow 2 uses
13141 unsigned AllowedUses = InVec.getOperand(0) == InVec.getOperand(1) ? 2 : 1;
13143 if (LdNode.getOpcode() == ISD::BITCAST) {
13144 // Don't duplicate a load with other uses.
13145 if (!LdNode.getNode()->hasNUsesOfValue(AllowedUses, 0))
13148 AllowedUses = 1; // only allow 1 load use if we have a bitcast
13149 LdNode = LdNode.getOperand(0);
13152 if (!ISD::isNormalLoad(LdNode.getNode()))
13155 LoadSDNode *LN0 = cast<LoadSDNode>(LdNode);
13157 if (!LN0 ||!LN0->hasNUsesOfValue(AllowedUses, 0) || LN0->isVolatile())
13160 if (HasShuffleIntoBitcast) {
13161 // If there's a bitcast before the shuffle, check if the load type and
13162 // alignment is valid.
13163 unsigned Align = LN0->getAlignment();
13164 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
13165 unsigned NewAlign = TLI.getTargetData()->
13166 getABITypeAlignment(VT.getTypeForEVT(*DAG.getContext()));
13168 if (NewAlign > Align || !TLI.isOperationLegalOrCustom(ISD::LOAD, VT))
13172 // All checks match so transform back to vector_shuffle so that DAG combiner
13173 // can finish the job
13174 DebugLoc dl = N->getDebugLoc();
13176 // Create shuffle node taking into account the case that its a unary shuffle
13177 SDValue Shuffle = (UnaryShuffle) ? DAG.getUNDEF(VT) : InVec.getOperand(1);
13178 Shuffle = DAG.getVectorShuffle(InVec.getValueType(), dl,
13179 InVec.getOperand(0), Shuffle,
13181 Shuffle = DAG.getNode(ISD::BITCAST, dl, VT, Shuffle);
13182 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, N->getValueType(0), Shuffle,
13186 /// PerformEXTRACT_VECTOR_ELTCombine - Detect vector gather/scatter index
13187 /// generation and convert it from being a bunch of shuffles and extracts
13188 /// to a simple store and scalar loads to extract the elements.
13189 static SDValue PerformEXTRACT_VECTOR_ELTCombine(SDNode *N, SelectionDAG &DAG,
13190 TargetLowering::DAGCombinerInfo &DCI) {
13191 SDValue NewOp = XFormVExtractWithShuffleIntoLoad(N, DAG, DCI);
13192 if (NewOp.getNode())
13195 SDValue InputVector = N->getOperand(0);
13197 // Only operate on vectors of 4 elements, where the alternative shuffling
13198 // gets to be more expensive.
13199 if (InputVector.getValueType() != MVT::v4i32)
13202 // Check whether every use of InputVector is an EXTRACT_VECTOR_ELT with a
13203 // single use which is a sign-extend or zero-extend, and all elements are
13205 SmallVector<SDNode *, 4> Uses;
13206 unsigned ExtractedElements = 0;
13207 for (SDNode::use_iterator UI = InputVector.getNode()->use_begin(),
13208 UE = InputVector.getNode()->use_end(); UI != UE; ++UI) {
13209 if (UI.getUse().getResNo() != InputVector.getResNo())
13212 SDNode *Extract = *UI;
13213 if (Extract->getOpcode() != ISD::EXTRACT_VECTOR_ELT)
13216 if (Extract->getValueType(0) != MVT::i32)
13218 if (!Extract->hasOneUse())
13220 if (Extract->use_begin()->getOpcode() != ISD::SIGN_EXTEND &&
13221 Extract->use_begin()->getOpcode() != ISD::ZERO_EXTEND)
13223 if (!isa<ConstantSDNode>(Extract->getOperand(1)))
13226 // Record which element was extracted.
13227 ExtractedElements |=
13228 1 << cast<ConstantSDNode>(Extract->getOperand(1))->getZExtValue();
13230 Uses.push_back(Extract);
13233 // If not all the elements were used, this may not be worthwhile.
13234 if (ExtractedElements != 15)
13237 // Ok, we've now decided to do the transformation.
13238 DebugLoc dl = InputVector.getDebugLoc();
13240 // Store the value to a temporary stack slot.
13241 SDValue StackPtr = DAG.CreateStackTemporary(InputVector.getValueType());
13242 SDValue Ch = DAG.getStore(DAG.getEntryNode(), dl, InputVector, StackPtr,
13243 MachinePointerInfo(), false, false, 0);
13245 // Replace each use (extract) with a load of the appropriate element.
13246 for (SmallVectorImpl<SDNode *>::iterator UI = Uses.begin(),
13247 UE = Uses.end(); UI != UE; ++UI) {
13248 SDNode *Extract = *UI;
13250 // cOMpute the element's address.
13251 SDValue Idx = Extract->getOperand(1);
13253 InputVector.getValueType().getVectorElementType().getSizeInBits()/8;
13254 uint64_t Offset = EltSize * cast<ConstantSDNode>(Idx)->getZExtValue();
13255 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
13256 SDValue OffsetVal = DAG.getConstant(Offset, TLI.getPointerTy());
13258 SDValue ScalarAddr = DAG.getNode(ISD::ADD, dl, TLI.getPointerTy(),
13259 StackPtr, OffsetVal);
13261 // Load the scalar.
13262 SDValue LoadScalar = DAG.getLoad(Extract->getValueType(0), dl, Ch,
13263 ScalarAddr, MachinePointerInfo(),
13264 false, false, false, 0);
13266 // Replace the exact with the load.
13267 DAG.ReplaceAllUsesOfValueWith(SDValue(Extract, 0), LoadScalar);
13270 // The replacement was made in place; don't return anything.
13274 /// PerformSELECTCombine - Do target-specific dag combines on SELECT and VSELECT
13276 static SDValue PerformSELECTCombine(SDNode *N, SelectionDAG &DAG,
13277 TargetLowering::DAGCombinerInfo &DCI,
13278 const X86Subtarget *Subtarget) {
13281 DebugLoc DL = N->getDebugLoc();
13282 SDValue Cond = N->getOperand(0);
13283 // Get the LHS/RHS of the select.
13284 SDValue LHS = N->getOperand(1);
13285 SDValue RHS = N->getOperand(2);
13286 EVT VT = LHS.getValueType();
13288 // If we have SSE[12] support, try to form min/max nodes. SSE min/max
13289 // instructions match the semantics of the common C idiom x<y?x:y but not
13290 // x<=y?x:y, because of how they handle negative zero (which can be
13291 // ignored in unsafe-math mode).
13292 if (Cond.getOpcode() == ISD::SETCC && VT.isFloatingPoint() &&
13293 VT != MVT::f80 && DAG.getTargetLoweringInfo().isTypeLegal(VT) &&
13294 (Subtarget->hasSSE2() ||
13295 (Subtarget->hasSSE1() && VT.getScalarType() == MVT::f32))) {
13296 ISD::CondCode CC = cast<CondCodeSDNode>(Cond.getOperand(2))->get();
13298 unsigned Opcode = 0;
13299 // Check for x CC y ? x : y.
13300 if (DAG.isEqualTo(LHS, Cond.getOperand(0)) &&
13301 DAG.isEqualTo(RHS, Cond.getOperand(1))) {
13305 // Converting this to a min would handle NaNs incorrectly, and swapping
13306 // the operands would cause it to handle comparisons between positive
13307 // and negative zero incorrectly.
13308 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS)) {
13309 if (!DAG.getTarget().Options.UnsafeFPMath &&
13310 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS)))
13312 std::swap(LHS, RHS);
13314 Opcode = X86ISD::FMIN;
13317 // Converting this to a min would handle comparisons between positive
13318 // and negative zero incorrectly.
13319 if (!DAG.getTarget().Options.UnsafeFPMath &&
13320 !DAG.isKnownNeverZero(LHS) && !DAG.isKnownNeverZero(RHS))
13322 Opcode = X86ISD::FMIN;
13325 // Converting this to a min would handle both negative zeros and NaNs
13326 // incorrectly, but we can swap the operands to fix both.
13327 std::swap(LHS, RHS);
13331 Opcode = X86ISD::FMIN;
13335 // Converting this to a max would handle comparisons between positive
13336 // and negative zero incorrectly.
13337 if (!DAG.getTarget().Options.UnsafeFPMath &&
13338 !DAG.isKnownNeverZero(LHS) && !DAG.isKnownNeverZero(RHS))
13340 Opcode = X86ISD::FMAX;
13343 // Converting this to a max would handle NaNs incorrectly, and swapping
13344 // the operands would cause it to handle comparisons between positive
13345 // and negative zero incorrectly.
13346 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS)) {
13347 if (!DAG.getTarget().Options.UnsafeFPMath &&
13348 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS)))
13350 std::swap(LHS, RHS);
13352 Opcode = X86ISD::FMAX;
13355 // Converting this to a max would handle both negative zeros and NaNs
13356 // incorrectly, but we can swap the operands to fix both.
13357 std::swap(LHS, RHS);
13361 Opcode = X86ISD::FMAX;
13364 // Check for x CC y ? y : x -- a min/max with reversed arms.
13365 } else if (DAG.isEqualTo(LHS, Cond.getOperand(1)) &&
13366 DAG.isEqualTo(RHS, Cond.getOperand(0))) {
13370 // Converting this to a min would handle comparisons between positive
13371 // and negative zero incorrectly, and swapping the operands would
13372 // cause it to handle NaNs incorrectly.
13373 if (!DAG.getTarget().Options.UnsafeFPMath &&
13374 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS))) {
13375 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS))
13377 std::swap(LHS, RHS);
13379 Opcode = X86ISD::FMIN;
13382 // Converting this to a min would handle NaNs incorrectly.
13383 if (!DAG.getTarget().Options.UnsafeFPMath &&
13384 (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS)))
13386 Opcode = X86ISD::FMIN;
13389 // Converting this to a min would handle both negative zeros and NaNs
13390 // incorrectly, but we can swap the operands to fix both.
13391 std::swap(LHS, RHS);
13395 Opcode = X86ISD::FMIN;
13399 // Converting this to a max would handle NaNs incorrectly.
13400 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS))
13402 Opcode = X86ISD::FMAX;
13405 // Converting this to a max would handle comparisons between positive
13406 // and negative zero incorrectly, and swapping the operands would
13407 // cause it to handle NaNs incorrectly.
13408 if (!DAG.getTarget().Options.UnsafeFPMath &&
13409 !DAG.isKnownNeverZero(LHS) && !DAG.isKnownNeverZero(RHS)) {
13410 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS))
13412 std::swap(LHS, RHS);
13414 Opcode = X86ISD::FMAX;
13417 // Converting this to a max would handle both negative zeros and NaNs
13418 // incorrectly, but we can swap the operands to fix both.
13419 std::swap(LHS, RHS);
13423 Opcode = X86ISD::FMAX;
13429 return DAG.getNode(Opcode, DL, N->getValueType(0), LHS, RHS);
13432 // If this is a select between two integer constants, try to do some
13434 if (ConstantSDNode *TrueC = dyn_cast<ConstantSDNode>(LHS)) {
13435 if (ConstantSDNode *FalseC = dyn_cast<ConstantSDNode>(RHS))
13436 // Don't do this for crazy integer types.
13437 if (DAG.getTargetLoweringInfo().isTypeLegal(LHS.getValueType())) {
13438 // If this is efficiently invertible, canonicalize the LHSC/RHSC values
13439 // so that TrueC (the true value) is larger than FalseC.
13440 bool NeedsCondInvert = false;
13442 if (TrueC->getAPIntValue().ult(FalseC->getAPIntValue()) &&
13443 // Efficiently invertible.
13444 (Cond.getOpcode() == ISD::SETCC || // setcc -> invertible.
13445 (Cond.getOpcode() == ISD::XOR && // xor(X, C) -> invertible.
13446 isa<ConstantSDNode>(Cond.getOperand(1))))) {
13447 NeedsCondInvert = true;
13448 std::swap(TrueC, FalseC);
13451 // Optimize C ? 8 : 0 -> zext(C) << 3. Likewise for any pow2/0.
13452 if (FalseC->getAPIntValue() == 0 &&
13453 TrueC->getAPIntValue().isPowerOf2()) {
13454 if (NeedsCondInvert) // Invert the condition if needed.
13455 Cond = DAG.getNode(ISD::XOR, DL, Cond.getValueType(), Cond,
13456 DAG.getConstant(1, Cond.getValueType()));
13458 // Zero extend the condition if needed.
13459 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, LHS.getValueType(), Cond);
13461 unsigned ShAmt = TrueC->getAPIntValue().logBase2();
13462 return DAG.getNode(ISD::SHL, DL, LHS.getValueType(), Cond,
13463 DAG.getConstant(ShAmt, MVT::i8));
13466 // Optimize Cond ? cst+1 : cst -> zext(setcc(C)+cst.
13467 if (FalseC->getAPIntValue()+1 == TrueC->getAPIntValue()) {
13468 if (NeedsCondInvert) // Invert the condition if needed.
13469 Cond = DAG.getNode(ISD::XOR, DL, Cond.getValueType(), Cond,
13470 DAG.getConstant(1, Cond.getValueType()));
13472 // Zero extend the condition if needed.
13473 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL,
13474 FalseC->getValueType(0), Cond);
13475 return DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond,
13476 SDValue(FalseC, 0));
13479 // Optimize cases that will turn into an LEA instruction. This requires
13480 // an i32 or i64 and an efficient multiplier (1, 2, 3, 4, 5, 8, 9).
13481 if (N->getValueType(0) == MVT::i32 || N->getValueType(0) == MVT::i64) {
13482 uint64_t Diff = TrueC->getZExtValue()-FalseC->getZExtValue();
13483 if (N->getValueType(0) == MVT::i32) Diff = (unsigned)Diff;
13485 bool isFastMultiplier = false;
13487 switch ((unsigned char)Diff) {
13489 case 1: // result = add base, cond
13490 case 2: // result = lea base( , cond*2)
13491 case 3: // result = lea base(cond, cond*2)
13492 case 4: // result = lea base( , cond*4)
13493 case 5: // result = lea base(cond, cond*4)
13494 case 8: // result = lea base( , cond*8)
13495 case 9: // result = lea base(cond, cond*8)
13496 isFastMultiplier = true;
13501 if (isFastMultiplier) {
13502 APInt Diff = TrueC->getAPIntValue()-FalseC->getAPIntValue();
13503 if (NeedsCondInvert) // Invert the condition if needed.
13504 Cond = DAG.getNode(ISD::XOR, DL, Cond.getValueType(), Cond,
13505 DAG.getConstant(1, Cond.getValueType()));
13507 // Zero extend the condition if needed.
13508 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, FalseC->getValueType(0),
13510 // Scale the condition by the difference.
13512 Cond = DAG.getNode(ISD::MUL, DL, Cond.getValueType(), Cond,
13513 DAG.getConstant(Diff, Cond.getValueType()));
13515 // Add the base if non-zero.
13516 if (FalseC->getAPIntValue() != 0)
13517 Cond = DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond,
13518 SDValue(FalseC, 0));
13525 // Canonicalize max and min:
13526 // (x > y) ? x : y -> (x >= y) ? x : y
13527 // (x < y) ? x : y -> (x <= y) ? x : y
13528 // This allows use of COND_S / COND_NS (see TranslateX86CC) which eliminates
13529 // the need for an extra compare
13530 // against zero. e.g.
13531 // (x - y) > 0 : (x - y) ? 0 -> (x - y) >= 0 : (x - y) ? 0
13533 // testl %edi, %edi
13535 // cmovgl %edi, %eax
13539 // cmovsl %eax, %edi
13540 if (N->getOpcode() == ISD::SELECT && Cond.getOpcode() == ISD::SETCC &&
13541 DAG.isEqualTo(LHS, Cond.getOperand(0)) &&
13542 DAG.isEqualTo(RHS, Cond.getOperand(1))) {
13543 ISD::CondCode CC = cast<CondCodeSDNode>(Cond.getOperand(2))->get();
13548 ISD::CondCode NewCC = (CC == ISD::SETLT) ? ISD::SETLE : ISD::SETGE;
13549 Cond = DAG.getSetCC(Cond.getDebugLoc(), Cond.getValueType(),
13550 Cond.getOperand(0), Cond.getOperand(1), NewCC);
13551 return DAG.getNode(ISD::SELECT, DL, VT, Cond, LHS, RHS);
13556 // If we know that this node is legal then we know that it is going to be
13557 // matched by one of the SSE/AVX BLEND instructions. These instructions only
13558 // depend on the highest bit in each word. Try to use SimplifyDemandedBits
13559 // to simplify previous instructions.
13560 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
13561 if (N->getOpcode() == ISD::VSELECT && DCI.isBeforeLegalizeOps() &&
13562 !DCI.isBeforeLegalize() &&
13563 TLI.isOperationLegal(ISD::VSELECT, VT)) {
13564 unsigned BitWidth = Cond.getValueType().getScalarType().getSizeInBits();
13565 assert(BitWidth >= 8 && BitWidth <= 64 && "Invalid mask size");
13566 APInt DemandedMask = APInt::getHighBitsSet(BitWidth, 1);
13568 APInt KnownZero, KnownOne;
13569 TargetLowering::TargetLoweringOpt TLO(DAG, DCI.isBeforeLegalize(),
13570 DCI.isBeforeLegalizeOps());
13571 if (TLO.ShrinkDemandedConstant(Cond, DemandedMask) ||
13572 TLI.SimplifyDemandedBits(Cond, DemandedMask, KnownZero, KnownOne, TLO))
13573 DCI.CommitTargetLoweringOpt(TLO);
13579 /// Optimize X86ISD::CMOV [LHS, RHS, CONDCODE (e.g. X86::COND_NE), CONDVAL]
13580 static SDValue PerformCMOVCombine(SDNode *N, SelectionDAG &DAG,
13581 TargetLowering::DAGCombinerInfo &DCI) {
13582 DebugLoc DL = N->getDebugLoc();
13584 // If the flag operand isn't dead, don't touch this CMOV.
13585 if (N->getNumValues() == 2 && !SDValue(N, 1).use_empty())
13588 SDValue FalseOp = N->getOperand(0);
13589 SDValue TrueOp = N->getOperand(1);
13590 X86::CondCode CC = (X86::CondCode)N->getConstantOperandVal(2);
13591 SDValue Cond = N->getOperand(3);
13592 if (CC == X86::COND_E || CC == X86::COND_NE) {
13593 switch (Cond.getOpcode()) {
13597 // If operand of BSR / BSF are proven never zero, then ZF cannot be set.
13598 if (DAG.isKnownNeverZero(Cond.getOperand(0)))
13599 return (CC == X86::COND_E) ? FalseOp : TrueOp;
13603 // If this is a select between two integer constants, try to do some
13604 // optimizations. Note that the operands are ordered the opposite of SELECT
13606 if (ConstantSDNode *TrueC = dyn_cast<ConstantSDNode>(TrueOp)) {
13607 if (ConstantSDNode *FalseC = dyn_cast<ConstantSDNode>(FalseOp)) {
13608 // Canonicalize the TrueC/FalseC values so that TrueC (the true value) is
13609 // larger than FalseC (the false value).
13610 if (TrueC->getAPIntValue().ult(FalseC->getAPIntValue())) {
13611 CC = X86::GetOppositeBranchCondition(CC);
13612 std::swap(TrueC, FalseC);
13615 // Optimize C ? 8 : 0 -> zext(setcc(C)) << 3. Likewise for any pow2/0.
13616 // This is efficient for any integer data type (including i8/i16) and
13618 if (FalseC->getAPIntValue() == 0 && TrueC->getAPIntValue().isPowerOf2()) {
13619 Cond = DAG.getNode(X86ISD::SETCC, DL, MVT::i8,
13620 DAG.getConstant(CC, MVT::i8), Cond);
13622 // Zero extend the condition if needed.
13623 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, TrueC->getValueType(0), Cond);
13625 unsigned ShAmt = TrueC->getAPIntValue().logBase2();
13626 Cond = DAG.getNode(ISD::SHL, DL, Cond.getValueType(), Cond,
13627 DAG.getConstant(ShAmt, MVT::i8));
13628 if (N->getNumValues() == 2) // Dead flag value?
13629 return DCI.CombineTo(N, Cond, SDValue());
13633 // Optimize Cond ? cst+1 : cst -> zext(setcc(C)+cst. This is efficient
13634 // for any integer data type, including i8/i16.
13635 if (FalseC->getAPIntValue()+1 == TrueC->getAPIntValue()) {
13636 Cond = DAG.getNode(X86ISD::SETCC, DL, MVT::i8,
13637 DAG.getConstant(CC, MVT::i8), Cond);
13639 // Zero extend the condition if needed.
13640 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL,
13641 FalseC->getValueType(0), Cond);
13642 Cond = DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond,
13643 SDValue(FalseC, 0));
13645 if (N->getNumValues() == 2) // Dead flag value?
13646 return DCI.CombineTo(N, Cond, SDValue());
13650 // Optimize cases that will turn into an LEA instruction. This requires
13651 // an i32 or i64 and an efficient multiplier (1, 2, 3, 4, 5, 8, 9).
13652 if (N->getValueType(0) == MVT::i32 || N->getValueType(0) == MVT::i64) {
13653 uint64_t Diff = TrueC->getZExtValue()-FalseC->getZExtValue();
13654 if (N->getValueType(0) == MVT::i32) Diff = (unsigned)Diff;
13656 bool isFastMultiplier = false;
13658 switch ((unsigned char)Diff) {
13660 case 1: // result = add base, cond
13661 case 2: // result = lea base( , cond*2)
13662 case 3: // result = lea base(cond, cond*2)
13663 case 4: // result = lea base( , cond*4)
13664 case 5: // result = lea base(cond, cond*4)
13665 case 8: // result = lea base( , cond*8)
13666 case 9: // result = lea base(cond, cond*8)
13667 isFastMultiplier = true;
13672 if (isFastMultiplier) {
13673 APInt Diff = TrueC->getAPIntValue()-FalseC->getAPIntValue();
13674 Cond = DAG.getNode(X86ISD::SETCC, DL, MVT::i8,
13675 DAG.getConstant(CC, MVT::i8), Cond);
13676 // Zero extend the condition if needed.
13677 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, FalseC->getValueType(0),
13679 // Scale the condition by the difference.
13681 Cond = DAG.getNode(ISD::MUL, DL, Cond.getValueType(), Cond,
13682 DAG.getConstant(Diff, Cond.getValueType()));
13684 // Add the base if non-zero.
13685 if (FalseC->getAPIntValue() != 0)
13686 Cond = DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond,
13687 SDValue(FalseC, 0));
13688 if (N->getNumValues() == 2) // Dead flag value?
13689 return DCI.CombineTo(N, Cond, SDValue());
13699 /// PerformMulCombine - Optimize a single multiply with constant into two
13700 /// in order to implement it with two cheaper instructions, e.g.
13701 /// LEA + SHL, LEA + LEA.
13702 static SDValue PerformMulCombine(SDNode *N, SelectionDAG &DAG,
13703 TargetLowering::DAGCombinerInfo &DCI) {
13704 if (DCI.isBeforeLegalize() || DCI.isCalledByLegalizer())
13707 EVT VT = N->getValueType(0);
13708 if (VT != MVT::i64)
13711 ConstantSDNode *C = dyn_cast<ConstantSDNode>(N->getOperand(1));
13714 uint64_t MulAmt = C->getZExtValue();
13715 if (isPowerOf2_64(MulAmt) || MulAmt == 3 || MulAmt == 5 || MulAmt == 9)
13718 uint64_t MulAmt1 = 0;
13719 uint64_t MulAmt2 = 0;
13720 if ((MulAmt % 9) == 0) {
13722 MulAmt2 = MulAmt / 9;
13723 } else if ((MulAmt % 5) == 0) {
13725 MulAmt2 = MulAmt / 5;
13726 } else if ((MulAmt % 3) == 0) {
13728 MulAmt2 = MulAmt / 3;
13731 (isPowerOf2_64(MulAmt2) || MulAmt2 == 3 || MulAmt2 == 5 || MulAmt2 == 9)){
13732 DebugLoc DL = N->getDebugLoc();
13734 if (isPowerOf2_64(MulAmt2) &&
13735 !(N->hasOneUse() && N->use_begin()->getOpcode() == ISD::ADD))
13736 // If second multiplifer is pow2, issue it first. We want the multiply by
13737 // 3, 5, or 9 to be folded into the addressing mode unless the lone use
13739 std::swap(MulAmt1, MulAmt2);
13742 if (isPowerOf2_64(MulAmt1))
13743 NewMul = DAG.getNode(ISD::SHL, DL, VT, N->getOperand(0),
13744 DAG.getConstant(Log2_64(MulAmt1), MVT::i8));
13746 NewMul = DAG.getNode(X86ISD::MUL_IMM, DL, VT, N->getOperand(0),
13747 DAG.getConstant(MulAmt1, VT));
13749 if (isPowerOf2_64(MulAmt2))
13750 NewMul = DAG.getNode(ISD::SHL, DL, VT, NewMul,
13751 DAG.getConstant(Log2_64(MulAmt2), MVT::i8));
13753 NewMul = DAG.getNode(X86ISD::MUL_IMM, DL, VT, NewMul,
13754 DAG.getConstant(MulAmt2, VT));
13756 // Do not add new nodes to DAG combiner worklist.
13757 DCI.CombineTo(N, NewMul, false);
13762 static SDValue PerformSHLCombine(SDNode *N, SelectionDAG &DAG) {
13763 SDValue N0 = N->getOperand(0);
13764 SDValue N1 = N->getOperand(1);
13765 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1);
13766 EVT VT = N0.getValueType();
13768 // fold (shl (and (setcc_c), c1), c2) -> (and setcc_c, (c1 << c2))
13769 // since the result of setcc_c is all zero's or all ones.
13770 if (VT.isInteger() && !VT.isVector() &&
13771 N1C && N0.getOpcode() == ISD::AND &&
13772 N0.getOperand(1).getOpcode() == ISD::Constant) {
13773 SDValue N00 = N0.getOperand(0);
13774 if (N00.getOpcode() == X86ISD::SETCC_CARRY ||
13775 ((N00.getOpcode() == ISD::ANY_EXTEND ||
13776 N00.getOpcode() == ISD::ZERO_EXTEND) &&
13777 N00.getOperand(0).getOpcode() == X86ISD::SETCC_CARRY)) {
13778 APInt Mask = cast<ConstantSDNode>(N0.getOperand(1))->getAPIntValue();
13779 APInt ShAmt = N1C->getAPIntValue();
13780 Mask = Mask.shl(ShAmt);
13782 return DAG.getNode(ISD::AND, N->getDebugLoc(), VT,
13783 N00, DAG.getConstant(Mask, VT));
13788 // Hardware support for vector shifts is sparse which makes us scalarize the
13789 // vector operations in many cases. Also, on sandybridge ADD is faster than
13791 // (shl V, 1) -> add V,V
13792 if (isSplatVector(N1.getNode())) {
13793 assert(N0.getValueType().isVector() && "Invalid vector shift type");
13794 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1->getOperand(0));
13795 // We shift all of the values by one. In many cases we do not have
13796 // hardware support for this operation. This is better expressed as an ADD
13798 if (N1C && (1 == N1C->getZExtValue())) {
13799 return DAG.getNode(ISD::ADD, N->getDebugLoc(), VT, N0, N0);
13806 /// PerformShiftCombine - Transforms vector shift nodes to use vector shifts
13808 static SDValue PerformShiftCombine(SDNode* N, SelectionDAG &DAG,
13809 TargetLowering::DAGCombinerInfo &DCI,
13810 const X86Subtarget *Subtarget) {
13811 EVT VT = N->getValueType(0);
13812 if (N->getOpcode() == ISD::SHL) {
13813 SDValue V = PerformSHLCombine(N, DAG);
13814 if (V.getNode()) return V;
13817 // On X86 with SSE2 support, we can transform this to a vector shift if
13818 // all elements are shifted by the same amount. We can't do this in legalize
13819 // because the a constant vector is typically transformed to a constant pool
13820 // so we have no knowledge of the shift amount.
13821 if (!Subtarget->hasSSE2())
13824 if (VT != MVT::v2i64 && VT != MVT::v4i32 && VT != MVT::v8i16 &&
13825 (!Subtarget->hasAVX2() ||
13826 (VT != MVT::v4i64 && VT != MVT::v8i32 && VT != MVT::v16i16)))
13829 SDValue ShAmtOp = N->getOperand(1);
13830 EVT EltVT = VT.getVectorElementType();
13831 DebugLoc DL = N->getDebugLoc();
13832 SDValue BaseShAmt = SDValue();
13833 if (ShAmtOp.getOpcode() == ISD::BUILD_VECTOR) {
13834 unsigned NumElts = VT.getVectorNumElements();
13836 for (; i != NumElts; ++i) {
13837 SDValue Arg = ShAmtOp.getOperand(i);
13838 if (Arg.getOpcode() == ISD::UNDEF) continue;
13842 // Handle the case where the build_vector is all undef
13843 // FIXME: Should DAG allow this?
13847 for (; i != NumElts; ++i) {
13848 SDValue Arg = ShAmtOp.getOperand(i);
13849 if (Arg.getOpcode() == ISD::UNDEF) continue;
13850 if (Arg != BaseShAmt) {
13854 } else if (ShAmtOp.getOpcode() == ISD::VECTOR_SHUFFLE &&
13855 cast<ShuffleVectorSDNode>(ShAmtOp)->isSplat()) {
13856 SDValue InVec = ShAmtOp.getOperand(0);
13857 if (InVec.getOpcode() == ISD::BUILD_VECTOR) {
13858 unsigned NumElts = InVec.getValueType().getVectorNumElements();
13860 for (; i != NumElts; ++i) {
13861 SDValue Arg = InVec.getOperand(i);
13862 if (Arg.getOpcode() == ISD::UNDEF) continue;
13866 } else if (InVec.getOpcode() == ISD::INSERT_VECTOR_ELT) {
13867 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(InVec.getOperand(2))) {
13868 unsigned SplatIdx= cast<ShuffleVectorSDNode>(ShAmtOp)->getSplatIndex();
13869 if (C->getZExtValue() == SplatIdx)
13870 BaseShAmt = InVec.getOperand(1);
13873 if (BaseShAmt.getNode() == 0) {
13874 // Don't create instructions with illegal types after legalize
13876 if (!DAG.getTargetLoweringInfo().isTypeLegal(EltVT) &&
13877 !DCI.isBeforeLegalize())
13880 BaseShAmt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, EltVT, ShAmtOp,
13881 DAG.getIntPtrConstant(0));
13886 // The shift amount is an i32.
13887 if (EltVT.bitsGT(MVT::i32))
13888 BaseShAmt = DAG.getNode(ISD::TRUNCATE, DL, MVT::i32, BaseShAmt);
13889 else if (EltVT.bitsLT(MVT::i32))
13890 BaseShAmt = DAG.getNode(ISD::ZERO_EXTEND, DL, MVT::i32, BaseShAmt);
13892 // The shift amount is identical so we can do a vector shift.
13893 SDValue ValOp = N->getOperand(0);
13894 switch (N->getOpcode()) {
13896 llvm_unreachable("Unknown shift opcode!");
13898 switch (VT.getSimpleVT().SimpleTy) {
13899 default: return SDValue();
13906 return getTargetVShiftNode(X86ISD::VSHLI, DL, VT, ValOp, BaseShAmt, DAG);
13909 switch (VT.getSimpleVT().SimpleTy) {
13910 default: return SDValue();
13915 return getTargetVShiftNode(X86ISD::VSRAI, DL, VT, ValOp, BaseShAmt, DAG);
13918 switch (VT.getSimpleVT().SimpleTy) {
13919 default: return SDValue();
13926 return getTargetVShiftNode(X86ISD::VSRLI, DL, VT, ValOp, BaseShAmt, DAG);
13932 // CMPEQCombine - Recognize the distinctive (AND (setcc ...) (setcc ..))
13933 // where both setccs reference the same FP CMP, and rewrite for CMPEQSS
13934 // and friends. Likewise for OR -> CMPNEQSS.
13935 static SDValue CMPEQCombine(SDNode *N, SelectionDAG &DAG,
13936 TargetLowering::DAGCombinerInfo &DCI,
13937 const X86Subtarget *Subtarget) {
13940 // SSE1 supports CMP{eq|ne}SS, and SSE2 added CMP{eq|ne}SD, but
13941 // we're requiring SSE2 for both.
13942 if (Subtarget->hasSSE2() && isAndOrOfSetCCs(SDValue(N, 0U), opcode)) {
13943 SDValue N0 = N->getOperand(0);
13944 SDValue N1 = N->getOperand(1);
13945 SDValue CMP0 = N0->getOperand(1);
13946 SDValue CMP1 = N1->getOperand(1);
13947 DebugLoc DL = N->getDebugLoc();
13949 // The SETCCs should both refer to the same CMP.
13950 if (CMP0.getOpcode() != X86ISD::CMP || CMP0 != CMP1)
13953 SDValue CMP00 = CMP0->getOperand(0);
13954 SDValue CMP01 = CMP0->getOperand(1);
13955 EVT VT = CMP00.getValueType();
13957 if (VT == MVT::f32 || VT == MVT::f64) {
13958 bool ExpectingFlags = false;
13959 // Check for any users that want flags:
13960 for (SDNode::use_iterator UI = N->use_begin(),
13962 !ExpectingFlags && UI != UE; ++UI)
13963 switch (UI->getOpcode()) {
13968 ExpectingFlags = true;
13970 case ISD::CopyToReg:
13971 case ISD::SIGN_EXTEND:
13972 case ISD::ZERO_EXTEND:
13973 case ISD::ANY_EXTEND:
13977 if (!ExpectingFlags) {
13978 enum X86::CondCode cc0 = (enum X86::CondCode)N0.getConstantOperandVal(0);
13979 enum X86::CondCode cc1 = (enum X86::CondCode)N1.getConstantOperandVal(0);
13981 if (cc1 == X86::COND_E || cc1 == X86::COND_NE) {
13982 X86::CondCode tmp = cc0;
13987 if ((cc0 == X86::COND_E && cc1 == X86::COND_NP) ||
13988 (cc0 == X86::COND_NE && cc1 == X86::COND_P)) {
13989 bool is64BitFP = (CMP00.getValueType() == MVT::f64);
13990 X86ISD::NodeType NTOperator = is64BitFP ?
13991 X86ISD::FSETCCsd : X86ISD::FSETCCss;
13992 // FIXME: need symbolic constants for these magic numbers.
13993 // See X86ATTInstPrinter.cpp:printSSECC().
13994 unsigned x86cc = (cc0 == X86::COND_E) ? 0 : 4;
13995 SDValue OnesOrZeroesF = DAG.getNode(NTOperator, DL, MVT::f32, CMP00, CMP01,
13996 DAG.getConstant(x86cc, MVT::i8));
13997 SDValue OnesOrZeroesI = DAG.getNode(ISD::BITCAST, DL, MVT::i32,
13999 SDValue ANDed = DAG.getNode(ISD::AND, DL, MVT::i32, OnesOrZeroesI,
14000 DAG.getConstant(1, MVT::i32));
14001 SDValue OneBitOfTruth = DAG.getNode(ISD::TRUNCATE, DL, MVT::i8, ANDed);
14002 return OneBitOfTruth;
14010 /// CanFoldXORWithAllOnes - Test whether the XOR operand is a AllOnes vector
14011 /// so it can be folded inside ANDNP.
14012 static bool CanFoldXORWithAllOnes(const SDNode *N) {
14013 EVT VT = N->getValueType(0);
14015 // Match direct AllOnes for 128 and 256-bit vectors
14016 if (ISD::isBuildVectorAllOnes(N))
14019 // Look through a bit convert.
14020 if (N->getOpcode() == ISD::BITCAST)
14021 N = N->getOperand(0).getNode();
14023 // Sometimes the operand may come from a insert_subvector building a 256-bit
14025 if (VT.getSizeInBits() == 256 &&
14026 N->getOpcode() == ISD::INSERT_SUBVECTOR) {
14027 SDValue V1 = N->getOperand(0);
14028 SDValue V2 = N->getOperand(1);
14030 if (V1.getOpcode() == ISD::INSERT_SUBVECTOR &&
14031 V1.getOperand(0).getOpcode() == ISD::UNDEF &&
14032 ISD::isBuildVectorAllOnes(V1.getOperand(1).getNode()) &&
14033 ISD::isBuildVectorAllOnes(V2.getNode()))
14040 static SDValue PerformAndCombine(SDNode *N, SelectionDAG &DAG,
14041 TargetLowering::DAGCombinerInfo &DCI,
14042 const X86Subtarget *Subtarget) {
14043 if (DCI.isBeforeLegalizeOps())
14046 SDValue R = CMPEQCombine(N, DAG, DCI, Subtarget);
14050 EVT VT = N->getValueType(0);
14052 // Create ANDN, BLSI, and BLSR instructions
14053 // BLSI is X & (-X)
14054 // BLSR is X & (X-1)
14055 if (Subtarget->hasBMI() && (VT == MVT::i32 || VT == MVT::i64)) {
14056 SDValue N0 = N->getOperand(0);
14057 SDValue N1 = N->getOperand(1);
14058 DebugLoc DL = N->getDebugLoc();
14060 // Check LHS for not
14061 if (N0.getOpcode() == ISD::XOR && isAllOnes(N0.getOperand(1)))
14062 return DAG.getNode(X86ISD::ANDN, DL, VT, N0.getOperand(0), N1);
14063 // Check RHS for not
14064 if (N1.getOpcode() == ISD::XOR && isAllOnes(N1.getOperand(1)))
14065 return DAG.getNode(X86ISD::ANDN, DL, VT, N1.getOperand(0), N0);
14067 // Check LHS for neg
14068 if (N0.getOpcode() == ISD::SUB && N0.getOperand(1) == N1 &&
14069 isZero(N0.getOperand(0)))
14070 return DAG.getNode(X86ISD::BLSI, DL, VT, N1);
14072 // Check RHS for neg
14073 if (N1.getOpcode() == ISD::SUB && N1.getOperand(1) == N0 &&
14074 isZero(N1.getOperand(0)))
14075 return DAG.getNode(X86ISD::BLSI, DL, VT, N0);
14077 // Check LHS for X-1
14078 if (N0.getOpcode() == ISD::ADD && N0.getOperand(0) == N1 &&
14079 isAllOnes(N0.getOperand(1)))
14080 return DAG.getNode(X86ISD::BLSR, DL, VT, N1);
14082 // Check RHS for X-1
14083 if (N1.getOpcode() == ISD::ADD && N1.getOperand(0) == N0 &&
14084 isAllOnes(N1.getOperand(1)))
14085 return DAG.getNode(X86ISD::BLSR, DL, VT, N0);
14090 // Want to form ANDNP nodes:
14091 // 1) In the hopes of then easily combining them with OR and AND nodes
14092 // to form PBLEND/PSIGN.
14093 // 2) To match ANDN packed intrinsics
14094 if (VT != MVT::v2i64 && VT != MVT::v4i64)
14097 SDValue N0 = N->getOperand(0);
14098 SDValue N1 = N->getOperand(1);
14099 DebugLoc DL = N->getDebugLoc();
14101 // Check LHS for vnot
14102 if (N0.getOpcode() == ISD::XOR &&
14103 //ISD::isBuildVectorAllOnes(N0.getOperand(1).getNode()))
14104 CanFoldXORWithAllOnes(N0.getOperand(1).getNode()))
14105 return DAG.getNode(X86ISD::ANDNP, DL, VT, N0.getOperand(0), N1);
14107 // Check RHS for vnot
14108 if (N1.getOpcode() == ISD::XOR &&
14109 //ISD::isBuildVectorAllOnes(N1.getOperand(1).getNode()))
14110 CanFoldXORWithAllOnes(N1.getOperand(1).getNode()))
14111 return DAG.getNode(X86ISD::ANDNP, DL, VT, N1.getOperand(0), N0);
14116 static SDValue PerformOrCombine(SDNode *N, SelectionDAG &DAG,
14117 TargetLowering::DAGCombinerInfo &DCI,
14118 const X86Subtarget *Subtarget) {
14119 if (DCI.isBeforeLegalizeOps())
14122 SDValue R = CMPEQCombine(N, DAG, DCI, Subtarget);
14126 EVT VT = N->getValueType(0);
14128 SDValue N0 = N->getOperand(0);
14129 SDValue N1 = N->getOperand(1);
14131 // look for psign/blend
14132 if (VT == MVT::v2i64 || VT == MVT::v4i64) {
14133 if (!Subtarget->hasSSSE3() ||
14134 (VT == MVT::v4i64 && !Subtarget->hasAVX2()))
14137 // Canonicalize pandn to RHS
14138 if (N0.getOpcode() == X86ISD::ANDNP)
14140 // or (and (m, y), (pandn m, x))
14141 if (N0.getOpcode() == ISD::AND && N1.getOpcode() == X86ISD::ANDNP) {
14142 SDValue Mask = N1.getOperand(0);
14143 SDValue X = N1.getOperand(1);
14145 if (N0.getOperand(0) == Mask)
14146 Y = N0.getOperand(1);
14147 if (N0.getOperand(1) == Mask)
14148 Y = N0.getOperand(0);
14150 // Check to see if the mask appeared in both the AND and ANDNP and
14154 // Validate that X, Y, and Mask are BIT_CONVERTS, and see through them.
14155 // Look through mask bitcast.
14156 if (Mask.getOpcode() == ISD::BITCAST)
14157 Mask = Mask.getOperand(0);
14158 if (X.getOpcode() == ISD::BITCAST)
14159 X = X.getOperand(0);
14160 if (Y.getOpcode() == ISD::BITCAST)
14161 Y = Y.getOperand(0);
14163 EVT MaskVT = Mask.getValueType();
14165 // Validate that the Mask operand is a vector sra node.
14166 // FIXME: what to do for bytes, since there is a psignb/pblendvb, but
14167 // there is no psrai.b
14168 if (Mask.getOpcode() != X86ISD::VSRAI)
14171 // Check that the SRA is all signbits.
14172 SDValue SraC = Mask.getOperand(1);
14173 unsigned SraAmt = cast<ConstantSDNode>(SraC)->getZExtValue();
14174 unsigned EltBits = MaskVT.getVectorElementType().getSizeInBits();
14175 if ((SraAmt + 1) != EltBits)
14178 DebugLoc DL = N->getDebugLoc();
14180 // Now we know we at least have a plendvb with the mask val. See if
14181 // we can form a psignb/w/d.
14182 // psign = x.type == y.type == mask.type && y = sub(0, x);
14183 if (Y.getOpcode() == ISD::SUB && Y.getOperand(1) == X &&
14184 ISD::isBuildVectorAllZeros(Y.getOperand(0).getNode()) &&
14185 X.getValueType() == MaskVT && Y.getValueType() == MaskVT) {
14186 assert((EltBits == 8 || EltBits == 16 || EltBits == 32) &&
14187 "Unsupported VT for PSIGN");
14188 Mask = DAG.getNode(X86ISD::PSIGN, DL, MaskVT, X, Mask.getOperand(0));
14189 return DAG.getNode(ISD::BITCAST, DL, VT, Mask);
14191 // PBLENDVB only available on SSE 4.1
14192 if (!Subtarget->hasSSE41())
14195 EVT BlendVT = (VT == MVT::v4i64) ? MVT::v32i8 : MVT::v16i8;
14197 X = DAG.getNode(ISD::BITCAST, DL, BlendVT, X);
14198 Y = DAG.getNode(ISD::BITCAST, DL, BlendVT, Y);
14199 Mask = DAG.getNode(ISD::BITCAST, DL, BlendVT, Mask);
14200 Mask = DAG.getNode(ISD::VSELECT, DL, BlendVT, Mask, Y, X);
14201 return DAG.getNode(ISD::BITCAST, DL, VT, Mask);
14205 if (VT != MVT::i16 && VT != MVT::i32 && VT != MVT::i64)
14208 // fold (or (x << c) | (y >> (64 - c))) ==> (shld64 x, y, c)
14209 if (N0.getOpcode() == ISD::SRL && N1.getOpcode() == ISD::SHL)
14211 if (N0.getOpcode() != ISD::SHL || N1.getOpcode() != ISD::SRL)
14213 if (!N0.hasOneUse() || !N1.hasOneUse())
14216 SDValue ShAmt0 = N0.getOperand(1);
14217 if (ShAmt0.getValueType() != MVT::i8)
14219 SDValue ShAmt1 = N1.getOperand(1);
14220 if (ShAmt1.getValueType() != MVT::i8)
14222 if (ShAmt0.getOpcode() == ISD::TRUNCATE)
14223 ShAmt0 = ShAmt0.getOperand(0);
14224 if (ShAmt1.getOpcode() == ISD::TRUNCATE)
14225 ShAmt1 = ShAmt1.getOperand(0);
14227 DebugLoc DL = N->getDebugLoc();
14228 unsigned Opc = X86ISD::SHLD;
14229 SDValue Op0 = N0.getOperand(0);
14230 SDValue Op1 = N1.getOperand(0);
14231 if (ShAmt0.getOpcode() == ISD::SUB) {
14232 Opc = X86ISD::SHRD;
14233 std::swap(Op0, Op1);
14234 std::swap(ShAmt0, ShAmt1);
14237 unsigned Bits = VT.getSizeInBits();
14238 if (ShAmt1.getOpcode() == ISD::SUB) {
14239 SDValue Sum = ShAmt1.getOperand(0);
14240 if (ConstantSDNode *SumC = dyn_cast<ConstantSDNode>(Sum)) {
14241 SDValue ShAmt1Op1 = ShAmt1.getOperand(1);
14242 if (ShAmt1Op1.getNode()->getOpcode() == ISD::TRUNCATE)
14243 ShAmt1Op1 = ShAmt1Op1.getOperand(0);
14244 if (SumC->getSExtValue() == Bits && ShAmt1Op1 == ShAmt0)
14245 return DAG.getNode(Opc, DL, VT,
14247 DAG.getNode(ISD::TRUNCATE, DL,
14250 } else if (ConstantSDNode *ShAmt1C = dyn_cast<ConstantSDNode>(ShAmt1)) {
14251 ConstantSDNode *ShAmt0C = dyn_cast<ConstantSDNode>(ShAmt0);
14253 ShAmt0C->getSExtValue() + ShAmt1C->getSExtValue() == Bits)
14254 return DAG.getNode(Opc, DL, VT,
14255 N0.getOperand(0), N1.getOperand(0),
14256 DAG.getNode(ISD::TRUNCATE, DL,
14263 // PerformXorCombine - Attempts to turn XOR nodes into BLSMSK nodes
14264 static SDValue PerformXorCombine(SDNode *N, SelectionDAG &DAG,
14265 TargetLowering::DAGCombinerInfo &DCI,
14266 const X86Subtarget *Subtarget) {
14267 if (DCI.isBeforeLegalizeOps())
14270 EVT VT = N->getValueType(0);
14272 if (VT != MVT::i32 && VT != MVT::i64)
14275 assert(Subtarget->hasBMI() && "Creating BLSMSK requires BMI instructions");
14277 // Create BLSMSK instructions by finding X ^ (X-1)
14278 SDValue N0 = N->getOperand(0);
14279 SDValue N1 = N->getOperand(1);
14280 DebugLoc DL = N->getDebugLoc();
14282 if (N0.getOpcode() == ISD::ADD && N0.getOperand(0) == N1 &&
14283 isAllOnes(N0.getOperand(1)))
14284 return DAG.getNode(X86ISD::BLSMSK, DL, VT, N1);
14286 if (N1.getOpcode() == ISD::ADD && N1.getOperand(0) == N0 &&
14287 isAllOnes(N1.getOperand(1)))
14288 return DAG.getNode(X86ISD::BLSMSK, DL, VT, N0);
14293 /// PerformLOADCombine - Do target-specific dag combines on LOAD nodes.
14294 static SDValue PerformLOADCombine(SDNode *N, SelectionDAG &DAG,
14295 const X86Subtarget *Subtarget) {
14296 LoadSDNode *Ld = cast<LoadSDNode>(N);
14297 EVT RegVT = Ld->getValueType(0);
14298 EVT MemVT = Ld->getMemoryVT();
14299 DebugLoc dl = Ld->getDebugLoc();
14300 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
14302 ISD::LoadExtType Ext = Ld->getExtensionType();
14304 // If this is a vector EXT Load then attempt to optimize it using a
14305 // shuffle. We need SSE4 for the shuffles.
14306 // TODO: It is possible to support ZExt by zeroing the undef values
14307 // during the shuffle phase or after the shuffle.
14308 if (RegVT.isVector() && RegVT.isInteger() &&
14309 Ext == ISD::EXTLOAD && Subtarget->hasSSE41()) {
14310 assert(MemVT != RegVT && "Cannot extend to the same type");
14311 assert(MemVT.isVector() && "Must load a vector from memory");
14313 unsigned NumElems = RegVT.getVectorNumElements();
14314 unsigned RegSz = RegVT.getSizeInBits();
14315 unsigned MemSz = MemVT.getSizeInBits();
14316 assert(RegSz > MemSz && "Register size must be greater than the mem size");
14317 // All sizes must be a power of two
14318 if (!isPowerOf2_32(RegSz * MemSz * NumElems)) return SDValue();
14320 // Attempt to load the original value using a single load op.
14321 // Find a scalar type which is equal to the loaded word size.
14322 MVT SclrLoadTy = MVT::i8;
14323 for (unsigned tp = MVT::FIRST_INTEGER_VALUETYPE;
14324 tp < MVT::LAST_INTEGER_VALUETYPE; ++tp) {
14325 MVT Tp = (MVT::SimpleValueType)tp;
14326 if (TLI.isTypeLegal(Tp) && Tp.getSizeInBits() == MemSz) {
14332 // Proceed if a load word is found.
14333 if (SclrLoadTy.getSizeInBits() != MemSz) return SDValue();
14335 EVT LoadUnitVecVT = EVT::getVectorVT(*DAG.getContext(), SclrLoadTy,
14336 RegSz/SclrLoadTy.getSizeInBits());
14338 EVT WideVecVT = EVT::getVectorVT(*DAG.getContext(), MemVT.getScalarType(),
14339 RegSz/MemVT.getScalarType().getSizeInBits());
14340 // Can't shuffle using an illegal type.
14341 if (!TLI.isTypeLegal(WideVecVT)) return SDValue();
14343 // Perform a single load.
14344 SDValue ScalarLoad = DAG.getLoad(SclrLoadTy, dl, Ld->getChain(),
14346 Ld->getPointerInfo(), Ld->isVolatile(),
14347 Ld->isNonTemporal(), Ld->isInvariant(),
14348 Ld->getAlignment());
14350 // Insert the word loaded into a vector.
14351 SDValue ScalarInVector = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
14352 LoadUnitVecVT, ScalarLoad);
14354 // Bitcast the loaded value to a vector of the original element type, in
14355 // the size of the target vector type.
14356 SDValue SlicedVec = DAG.getNode(ISD::BITCAST, dl, WideVecVT,
14358 unsigned SizeRatio = RegSz/MemSz;
14360 // Redistribute the loaded elements into the different locations.
14361 SmallVector<int, 8> ShuffleVec(NumElems * SizeRatio, -1);
14362 for (unsigned i = 0; i < NumElems; i++) ShuffleVec[i*SizeRatio] = i;
14364 SDValue Shuff = DAG.getVectorShuffle(WideVecVT, dl, SlicedVec,
14365 DAG.getUNDEF(SlicedVec.getValueType()),
14366 ShuffleVec.data());
14368 // Bitcast to the requested type.
14369 Shuff = DAG.getNode(ISD::BITCAST, dl, RegVT, Shuff);
14370 // Replace the original load with the new sequence
14371 // and return the new chain.
14372 DAG.ReplaceAllUsesOfValueWith(SDValue(N, 0), Shuff);
14373 return SDValue(ScalarLoad.getNode(), 1);
14379 /// PerformSTORECombine - Do target-specific dag combines on STORE nodes.
14380 static SDValue PerformSTORECombine(SDNode *N, SelectionDAG &DAG,
14381 const X86Subtarget *Subtarget) {
14382 StoreSDNode *St = cast<StoreSDNode>(N);
14383 EVT VT = St->getValue().getValueType();
14384 EVT StVT = St->getMemoryVT();
14385 DebugLoc dl = St->getDebugLoc();
14386 SDValue StoredVal = St->getOperand(1);
14387 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
14389 // If we are saving a concatenation of two XMM registers, perform two stores.
14390 // This is better in Sandy Bridge cause one 256-bit mem op is done via two
14391 // 128-bit ones. If in the future the cost becomes only one memory access the
14392 // first version would be better.
14393 if (VT.getSizeInBits() == 256 &&
14394 StoredVal.getNode()->getOpcode() == ISD::CONCAT_VECTORS &&
14395 StoredVal.getNumOperands() == 2) {
14397 SDValue Value0 = StoredVal.getOperand(0);
14398 SDValue Value1 = StoredVal.getOperand(1);
14400 SDValue Stride = DAG.getConstant(16, TLI.getPointerTy());
14401 SDValue Ptr0 = St->getBasePtr();
14402 SDValue Ptr1 = DAG.getNode(ISD::ADD, dl, Ptr0.getValueType(), Ptr0, Stride);
14404 SDValue Ch0 = DAG.getStore(St->getChain(), dl, Value0, Ptr0,
14405 St->getPointerInfo(), St->isVolatile(),
14406 St->isNonTemporal(), St->getAlignment());
14407 SDValue Ch1 = DAG.getStore(St->getChain(), dl, Value1, Ptr1,
14408 St->getPointerInfo(), St->isVolatile(),
14409 St->isNonTemporal(), St->getAlignment());
14410 return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Ch0, Ch1);
14413 // Optimize trunc store (of multiple scalars) to shuffle and store.
14414 // First, pack all of the elements in one place. Next, store to memory
14415 // in fewer chunks.
14416 if (St->isTruncatingStore() && VT.isVector()) {
14417 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
14418 unsigned NumElems = VT.getVectorNumElements();
14419 assert(StVT != VT && "Cannot truncate to the same type");
14420 unsigned FromSz = VT.getVectorElementType().getSizeInBits();
14421 unsigned ToSz = StVT.getVectorElementType().getSizeInBits();
14423 // From, To sizes and ElemCount must be pow of two
14424 if (!isPowerOf2_32(NumElems * FromSz * ToSz)) return SDValue();
14425 // We are going to use the original vector elt for storing.
14426 // Accumulated smaller vector elements must be a multiple of the store size.
14427 if (0 != (NumElems * FromSz) % ToSz) return SDValue();
14429 unsigned SizeRatio = FromSz / ToSz;
14431 assert(SizeRatio * NumElems * ToSz == VT.getSizeInBits());
14433 // Create a type on which we perform the shuffle
14434 EVT WideVecVT = EVT::getVectorVT(*DAG.getContext(),
14435 StVT.getScalarType(), NumElems*SizeRatio);
14437 assert(WideVecVT.getSizeInBits() == VT.getSizeInBits());
14439 SDValue WideVec = DAG.getNode(ISD::BITCAST, dl, WideVecVT, St->getValue());
14440 SmallVector<int, 8> ShuffleVec(NumElems * SizeRatio, -1);
14441 for (unsigned i = 0; i < NumElems; i++ ) ShuffleVec[i] = i * SizeRatio;
14443 // Can't shuffle using an illegal type
14444 if (!TLI.isTypeLegal(WideVecVT)) return SDValue();
14446 SDValue Shuff = DAG.getVectorShuffle(WideVecVT, dl, WideVec,
14447 DAG.getUNDEF(WideVec.getValueType()),
14448 ShuffleVec.data());
14449 // At this point all of the data is stored at the bottom of the
14450 // register. We now need to save it to mem.
14452 // Find the largest store unit
14453 MVT StoreType = MVT::i8;
14454 for (unsigned tp = MVT::FIRST_INTEGER_VALUETYPE;
14455 tp < MVT::LAST_INTEGER_VALUETYPE; ++tp) {
14456 MVT Tp = (MVT::SimpleValueType)tp;
14457 if (TLI.isTypeLegal(Tp) && StoreType.getSizeInBits() < NumElems * ToSz)
14461 // Bitcast the original vector into a vector of store-size units
14462 EVT StoreVecVT = EVT::getVectorVT(*DAG.getContext(),
14463 StoreType, VT.getSizeInBits()/EVT(StoreType).getSizeInBits());
14464 assert(StoreVecVT.getSizeInBits() == VT.getSizeInBits());
14465 SDValue ShuffWide = DAG.getNode(ISD::BITCAST, dl, StoreVecVT, Shuff);
14466 SmallVector<SDValue, 8> Chains;
14467 SDValue Increment = DAG.getConstant(StoreType.getSizeInBits()/8,
14468 TLI.getPointerTy());
14469 SDValue Ptr = St->getBasePtr();
14471 // Perform one or more big stores into memory.
14472 for (unsigned i = 0; i < (ToSz*NumElems)/StoreType.getSizeInBits() ; i++) {
14473 SDValue SubVec = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl,
14474 StoreType, ShuffWide,
14475 DAG.getIntPtrConstant(i));
14476 SDValue Ch = DAG.getStore(St->getChain(), dl, SubVec, Ptr,
14477 St->getPointerInfo(), St->isVolatile(),
14478 St->isNonTemporal(), St->getAlignment());
14479 Ptr = DAG.getNode(ISD::ADD, dl, Ptr.getValueType(), Ptr, Increment);
14480 Chains.push_back(Ch);
14483 return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, &Chains[0],
14488 // Turn load->store of MMX types into GPR load/stores. This avoids clobbering
14489 // the FP state in cases where an emms may be missing.
14490 // A preferable solution to the general problem is to figure out the right
14491 // places to insert EMMS. This qualifies as a quick hack.
14493 // Similarly, turn load->store of i64 into double load/stores in 32-bit mode.
14494 if (VT.getSizeInBits() != 64)
14497 const Function *F = DAG.getMachineFunction().getFunction();
14498 bool NoImplicitFloatOps = F->hasFnAttr(Attribute::NoImplicitFloat);
14499 bool F64IsLegal = !DAG.getTarget().Options.UseSoftFloat && !NoImplicitFloatOps
14500 && Subtarget->hasSSE2();
14501 if ((VT.isVector() ||
14502 (VT == MVT::i64 && F64IsLegal && !Subtarget->is64Bit())) &&
14503 isa<LoadSDNode>(St->getValue()) &&
14504 !cast<LoadSDNode>(St->getValue())->isVolatile() &&
14505 St->getChain().hasOneUse() && !St->isVolatile()) {
14506 SDNode* LdVal = St->getValue().getNode();
14507 LoadSDNode *Ld = 0;
14508 int TokenFactorIndex = -1;
14509 SmallVector<SDValue, 8> Ops;
14510 SDNode* ChainVal = St->getChain().getNode();
14511 // Must be a store of a load. We currently handle two cases: the load
14512 // is a direct child, and it's under an intervening TokenFactor. It is
14513 // possible to dig deeper under nested TokenFactors.
14514 if (ChainVal == LdVal)
14515 Ld = cast<LoadSDNode>(St->getChain());
14516 else if (St->getValue().hasOneUse() &&
14517 ChainVal->getOpcode() == ISD::TokenFactor) {
14518 for (unsigned i = 0, e = ChainVal->getNumOperands(); i != e; ++i) {
14519 if (ChainVal->getOperand(i).getNode() == LdVal) {
14520 TokenFactorIndex = i;
14521 Ld = cast<LoadSDNode>(St->getValue());
14523 Ops.push_back(ChainVal->getOperand(i));
14527 if (!Ld || !ISD::isNormalLoad(Ld))
14530 // If this is not the MMX case, i.e. we are just turning i64 load/store
14531 // into f64 load/store, avoid the transformation if there are multiple
14532 // uses of the loaded value.
14533 if (!VT.isVector() && !Ld->hasNUsesOfValue(1, 0))
14536 DebugLoc LdDL = Ld->getDebugLoc();
14537 DebugLoc StDL = N->getDebugLoc();
14538 // If we are a 64-bit capable x86, lower to a single movq load/store pair.
14539 // Otherwise, if it's legal to use f64 SSE instructions, use f64 load/store
14541 if (Subtarget->is64Bit() || F64IsLegal) {
14542 EVT LdVT = Subtarget->is64Bit() ? MVT::i64 : MVT::f64;
14543 SDValue NewLd = DAG.getLoad(LdVT, LdDL, Ld->getChain(), Ld->getBasePtr(),
14544 Ld->getPointerInfo(), Ld->isVolatile(),
14545 Ld->isNonTemporal(), Ld->isInvariant(),
14546 Ld->getAlignment());
14547 SDValue NewChain = NewLd.getValue(1);
14548 if (TokenFactorIndex != -1) {
14549 Ops.push_back(NewChain);
14550 NewChain = DAG.getNode(ISD::TokenFactor, LdDL, MVT::Other, &Ops[0],
14553 return DAG.getStore(NewChain, StDL, NewLd, St->getBasePtr(),
14554 St->getPointerInfo(),
14555 St->isVolatile(), St->isNonTemporal(),
14556 St->getAlignment());
14559 // Otherwise, lower to two pairs of 32-bit loads / stores.
14560 SDValue LoAddr = Ld->getBasePtr();
14561 SDValue HiAddr = DAG.getNode(ISD::ADD, LdDL, MVT::i32, LoAddr,
14562 DAG.getConstant(4, MVT::i32));
14564 SDValue LoLd = DAG.getLoad(MVT::i32, LdDL, Ld->getChain(), LoAddr,
14565 Ld->getPointerInfo(),
14566 Ld->isVolatile(), Ld->isNonTemporal(),
14567 Ld->isInvariant(), Ld->getAlignment());
14568 SDValue HiLd = DAG.getLoad(MVT::i32, LdDL, Ld->getChain(), HiAddr,
14569 Ld->getPointerInfo().getWithOffset(4),
14570 Ld->isVolatile(), Ld->isNonTemporal(),
14572 MinAlign(Ld->getAlignment(), 4));
14574 SDValue NewChain = LoLd.getValue(1);
14575 if (TokenFactorIndex != -1) {
14576 Ops.push_back(LoLd);
14577 Ops.push_back(HiLd);
14578 NewChain = DAG.getNode(ISD::TokenFactor, LdDL, MVT::Other, &Ops[0],
14582 LoAddr = St->getBasePtr();
14583 HiAddr = DAG.getNode(ISD::ADD, StDL, MVT::i32, LoAddr,
14584 DAG.getConstant(4, MVT::i32));
14586 SDValue LoSt = DAG.getStore(NewChain, StDL, LoLd, LoAddr,
14587 St->getPointerInfo(),
14588 St->isVolatile(), St->isNonTemporal(),
14589 St->getAlignment());
14590 SDValue HiSt = DAG.getStore(NewChain, StDL, HiLd, HiAddr,
14591 St->getPointerInfo().getWithOffset(4),
14593 St->isNonTemporal(),
14594 MinAlign(St->getAlignment(), 4));
14595 return DAG.getNode(ISD::TokenFactor, StDL, MVT::Other, LoSt, HiSt);
14600 /// isHorizontalBinOp - Return 'true' if this vector operation is "horizontal"
14601 /// and return the operands for the horizontal operation in LHS and RHS. A
14602 /// horizontal operation performs the binary operation on successive elements
14603 /// of its first operand, then on successive elements of its second operand,
14604 /// returning the resulting values in a vector. For example, if
14605 /// A = < float a0, float a1, float a2, float a3 >
14607 /// B = < float b0, float b1, float b2, float b3 >
14608 /// then the result of doing a horizontal operation on A and B is
14609 /// A horizontal-op B = < a0 op a1, a2 op a3, b0 op b1, b2 op b3 >.
14610 /// In short, LHS and RHS are inspected to see if LHS op RHS is of the form
14611 /// A horizontal-op B, for some already available A and B, and if so then LHS is
14612 /// set to A, RHS to B, and the routine returns 'true'.
14613 /// Note that the binary operation should have the property that if one of the
14614 /// operands is UNDEF then the result is UNDEF.
14615 static bool isHorizontalBinOp(SDValue &LHS, SDValue &RHS, bool IsCommutative) {
14616 // Look for the following pattern: if
14617 // A = < float a0, float a1, float a2, float a3 >
14618 // B = < float b0, float b1, float b2, float b3 >
14620 // LHS = VECTOR_SHUFFLE A, B, <0, 2, 4, 6>
14621 // RHS = VECTOR_SHUFFLE A, B, <1, 3, 5, 7>
14622 // then LHS op RHS = < a0 op a1, a2 op a3, b0 op b1, b2 op b3 >
14623 // which is A horizontal-op B.
14625 // At least one of the operands should be a vector shuffle.
14626 if (LHS.getOpcode() != ISD::VECTOR_SHUFFLE &&
14627 RHS.getOpcode() != ISD::VECTOR_SHUFFLE)
14630 EVT VT = LHS.getValueType();
14632 assert((VT.is128BitVector() || VT.is256BitVector()) &&
14633 "Unsupported vector type for horizontal add/sub");
14635 // Handle 128 and 256-bit vector lengths. AVX defines horizontal add/sub to
14636 // operate independently on 128-bit lanes.
14637 unsigned NumElts = VT.getVectorNumElements();
14638 unsigned NumLanes = VT.getSizeInBits()/128;
14639 unsigned NumLaneElts = NumElts / NumLanes;
14640 assert((NumLaneElts % 2 == 0) &&
14641 "Vector type should have an even number of elements in each lane");
14642 unsigned HalfLaneElts = NumLaneElts/2;
14644 // View LHS in the form
14645 // LHS = VECTOR_SHUFFLE A, B, LMask
14646 // If LHS is not a shuffle then pretend it is the shuffle
14647 // LHS = VECTOR_SHUFFLE LHS, undef, <0, 1, ..., N-1>
14648 // NOTE: in what follows a default initialized SDValue represents an UNDEF of
14651 SmallVector<int, 16> LMask(NumElts);
14652 if (LHS.getOpcode() == ISD::VECTOR_SHUFFLE) {
14653 if (LHS.getOperand(0).getOpcode() != ISD::UNDEF)
14654 A = LHS.getOperand(0);
14655 if (LHS.getOperand(1).getOpcode() != ISD::UNDEF)
14656 B = LHS.getOperand(1);
14657 ArrayRef<int> Mask = cast<ShuffleVectorSDNode>(LHS.getNode())->getMask();
14658 std::copy(Mask.begin(), Mask.end(), LMask.begin());
14660 if (LHS.getOpcode() != ISD::UNDEF)
14662 for (unsigned i = 0; i != NumElts; ++i)
14666 // Likewise, view RHS in the form
14667 // RHS = VECTOR_SHUFFLE C, D, RMask
14669 SmallVector<int, 16> RMask(NumElts);
14670 if (RHS.getOpcode() == ISD::VECTOR_SHUFFLE) {
14671 if (RHS.getOperand(0).getOpcode() != ISD::UNDEF)
14672 C = RHS.getOperand(0);
14673 if (RHS.getOperand(1).getOpcode() != ISD::UNDEF)
14674 D = RHS.getOperand(1);
14675 ArrayRef<int> Mask = cast<ShuffleVectorSDNode>(RHS.getNode())->getMask();
14676 std::copy(Mask.begin(), Mask.end(), RMask.begin());
14678 if (RHS.getOpcode() != ISD::UNDEF)
14680 for (unsigned i = 0; i != NumElts; ++i)
14684 // Check that the shuffles are both shuffling the same vectors.
14685 if (!(A == C && B == D) && !(A == D && B == C))
14688 // If everything is UNDEF then bail out: it would be better to fold to UNDEF.
14689 if (!A.getNode() && !B.getNode())
14692 // If A and B occur in reverse order in RHS, then "swap" them (which means
14693 // rewriting the mask).
14695 CommuteVectorShuffleMask(RMask, NumElts);
14697 // At this point LHS and RHS are equivalent to
14698 // LHS = VECTOR_SHUFFLE A, B, LMask
14699 // RHS = VECTOR_SHUFFLE A, B, RMask
14700 // Check that the masks correspond to performing a horizontal operation.
14701 for (unsigned i = 0; i != NumElts; ++i) {
14702 int LIdx = LMask[i], RIdx = RMask[i];
14704 // Ignore any UNDEF components.
14705 if (LIdx < 0 || RIdx < 0 ||
14706 (!A.getNode() && (LIdx < (int)NumElts || RIdx < (int)NumElts)) ||
14707 (!B.getNode() && (LIdx >= (int)NumElts || RIdx >= (int)NumElts)))
14710 // Check that successive elements are being operated on. If not, this is
14711 // not a horizontal operation.
14712 unsigned Src = (i/HalfLaneElts) % 2; // each lane is split between srcs
14713 unsigned LaneStart = (i/NumLaneElts) * NumLaneElts;
14714 int Index = 2*(i%HalfLaneElts) + NumElts*Src + LaneStart;
14715 if (!(LIdx == Index && RIdx == Index + 1) &&
14716 !(IsCommutative && LIdx == Index + 1 && RIdx == Index))
14720 LHS = A.getNode() ? A : B; // If A is 'UNDEF', use B for it.
14721 RHS = B.getNode() ? B : A; // If B is 'UNDEF', use A for it.
14725 /// PerformFADDCombine - Do target-specific dag combines on floating point adds.
14726 static SDValue PerformFADDCombine(SDNode *N, SelectionDAG &DAG,
14727 const X86Subtarget *Subtarget) {
14728 EVT VT = N->getValueType(0);
14729 SDValue LHS = N->getOperand(0);
14730 SDValue RHS = N->getOperand(1);
14732 // Try to synthesize horizontal adds from adds of shuffles.
14733 if (((Subtarget->hasSSE3() && (VT == MVT::v4f32 || VT == MVT::v2f64)) ||
14734 (Subtarget->hasAVX() && (VT == MVT::v8f32 || VT == MVT::v4f64))) &&
14735 isHorizontalBinOp(LHS, RHS, true))
14736 return DAG.getNode(X86ISD::FHADD, N->getDebugLoc(), VT, LHS, RHS);
14740 /// PerformFSUBCombine - Do target-specific dag combines on floating point subs.
14741 static SDValue PerformFSUBCombine(SDNode *N, SelectionDAG &DAG,
14742 const X86Subtarget *Subtarget) {
14743 EVT VT = N->getValueType(0);
14744 SDValue LHS = N->getOperand(0);
14745 SDValue RHS = N->getOperand(1);
14747 // Try to synthesize horizontal subs from subs of shuffles.
14748 if (((Subtarget->hasSSE3() && (VT == MVT::v4f32 || VT == MVT::v2f64)) ||
14749 (Subtarget->hasAVX() && (VT == MVT::v8f32 || VT == MVT::v4f64))) &&
14750 isHorizontalBinOp(LHS, RHS, false))
14751 return DAG.getNode(X86ISD::FHSUB, N->getDebugLoc(), VT, LHS, RHS);
14755 /// PerformFORCombine - Do target-specific dag combines on X86ISD::FOR and
14756 /// X86ISD::FXOR nodes.
14757 static SDValue PerformFORCombine(SDNode *N, SelectionDAG &DAG) {
14758 assert(N->getOpcode() == X86ISD::FOR || N->getOpcode() == X86ISD::FXOR);
14759 // F[X]OR(0.0, x) -> x
14760 // F[X]OR(x, 0.0) -> x
14761 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(0)))
14762 if (C->getValueAPF().isPosZero())
14763 return N->getOperand(1);
14764 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(1)))
14765 if (C->getValueAPF().isPosZero())
14766 return N->getOperand(0);
14770 /// PerformFANDCombine - Do target-specific dag combines on X86ISD::FAND nodes.
14771 static SDValue PerformFANDCombine(SDNode *N, SelectionDAG &DAG) {
14772 // FAND(0.0, x) -> 0.0
14773 // FAND(x, 0.0) -> 0.0
14774 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(0)))
14775 if (C->getValueAPF().isPosZero())
14776 return N->getOperand(0);
14777 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(1)))
14778 if (C->getValueAPF().isPosZero())
14779 return N->getOperand(1);
14783 static SDValue PerformBTCombine(SDNode *N,
14785 TargetLowering::DAGCombinerInfo &DCI) {
14786 // BT ignores high bits in the bit index operand.
14787 SDValue Op1 = N->getOperand(1);
14788 if (Op1.hasOneUse()) {
14789 unsigned BitWidth = Op1.getValueSizeInBits();
14790 APInt DemandedMask = APInt::getLowBitsSet(BitWidth, Log2_32(BitWidth));
14791 APInt KnownZero, KnownOne;
14792 TargetLowering::TargetLoweringOpt TLO(DAG, !DCI.isBeforeLegalize(),
14793 !DCI.isBeforeLegalizeOps());
14794 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
14795 if (TLO.ShrinkDemandedConstant(Op1, DemandedMask) ||
14796 TLI.SimplifyDemandedBits(Op1, DemandedMask, KnownZero, KnownOne, TLO))
14797 DCI.CommitTargetLoweringOpt(TLO);
14802 static SDValue PerformVZEXT_MOVLCombine(SDNode *N, SelectionDAG &DAG) {
14803 SDValue Op = N->getOperand(0);
14804 if (Op.getOpcode() == ISD::BITCAST)
14805 Op = Op.getOperand(0);
14806 EVT VT = N->getValueType(0), OpVT = Op.getValueType();
14807 if (Op.getOpcode() == X86ISD::VZEXT_LOAD &&
14808 VT.getVectorElementType().getSizeInBits() ==
14809 OpVT.getVectorElementType().getSizeInBits()) {
14810 return DAG.getNode(ISD::BITCAST, N->getDebugLoc(), VT, Op);
14815 static SDValue PerformSExtCombine(SDNode *N, SelectionDAG &DAG,
14816 TargetLowering::DAGCombinerInfo &DCI,
14817 const X86Subtarget *Subtarget) {
14818 if (!DCI.isBeforeLegalizeOps())
14821 if (!Subtarget->hasAVX())
14824 // Optimize vectors in AVX mode
14825 // Sign extend v8i16 to v8i32 and
14828 // Divide input vector into two parts
14829 // for v4i32 the shuffle mask will be { 0, 1, -1, -1} {2, 3, -1, -1}
14830 // use vpmovsx instruction to extend v4i32 -> v2i64; v8i16 -> v4i32
14831 // concat the vectors to original VT
14833 EVT VT = N->getValueType(0);
14834 SDValue Op = N->getOperand(0);
14835 EVT OpVT = Op.getValueType();
14836 DebugLoc dl = N->getDebugLoc();
14838 if ((VT == MVT::v4i64 && OpVT == MVT::v4i32) ||
14839 (VT == MVT::v8i32 && OpVT == MVT::v8i16)) {
14841 unsigned NumElems = OpVT.getVectorNumElements();
14842 SmallVector<int,8> ShufMask1(NumElems, -1);
14843 for (unsigned i = 0; i < NumElems/2; i++) ShufMask1[i] = i;
14845 SDValue OpLo = DAG.getVectorShuffle(OpVT, dl, Op, DAG.getUNDEF(OpVT),
14848 SmallVector<int,8> ShufMask2(NumElems, -1);
14849 for (unsigned i = 0; i < NumElems/2; i++) ShufMask2[i] = i + NumElems/2;
14851 SDValue OpHi = DAG.getVectorShuffle(OpVT, dl, Op, DAG.getUNDEF(OpVT),
14854 EVT HalfVT = EVT::getVectorVT(*DAG.getContext(), VT.getScalarType(),
14855 VT.getVectorNumElements()/2);
14857 OpLo = DAG.getNode(X86ISD::VSEXT_MOVL, dl, HalfVT, OpLo);
14858 OpHi = DAG.getNode(X86ISD::VSEXT_MOVL, dl, HalfVT, OpHi);
14860 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, OpLo, OpHi);
14865 static SDValue PerformZExtCombine(SDNode *N, SelectionDAG &DAG,
14866 const X86Subtarget *Subtarget) {
14867 // (i32 zext (and (i8 x86isd::setcc_carry), 1)) ->
14868 // (and (i32 x86isd::setcc_carry), 1)
14869 // This eliminates the zext. This transformation is necessary because
14870 // ISD::SETCC is always legalized to i8.
14871 DebugLoc dl = N->getDebugLoc();
14872 SDValue N0 = N->getOperand(0);
14873 EVT VT = N->getValueType(0);
14874 EVT OpVT = N0.getValueType();
14876 if (N0.getOpcode() == ISD::AND &&
14878 N0.getOperand(0).hasOneUse()) {
14879 SDValue N00 = N0.getOperand(0);
14880 if (N00.getOpcode() != X86ISD::SETCC_CARRY)
14882 ConstantSDNode *C = dyn_cast<ConstantSDNode>(N0.getOperand(1));
14883 if (!C || C->getZExtValue() != 1)
14885 return DAG.getNode(ISD::AND, dl, VT,
14886 DAG.getNode(X86ISD::SETCC_CARRY, dl, VT,
14887 N00.getOperand(0), N00.getOperand(1)),
14888 DAG.getConstant(1, VT));
14890 // Optimize vectors in AVX mode:
14893 // Use vpunpcklwd for 4 lower elements v8i16 -> v4i32.
14894 // Use vpunpckhwd for 4 upper elements v8i16 -> v4i32.
14895 // Concat upper and lower parts.
14898 // Use vpunpckldq for 4 lower elements v4i32 -> v2i64.
14899 // Use vpunpckhdq for 4 upper elements v4i32 -> v2i64.
14900 // Concat upper and lower parts.
14902 if (Subtarget->hasAVX()) {
14904 if (((VT == MVT::v8i32) && (OpVT == MVT::v8i16)) ||
14905 ((VT == MVT::v4i64) && (OpVT == MVT::v4i32))) {
14907 SDValue ZeroVec = getZeroVector(OpVT, Subtarget, DAG, dl);
14908 SDValue OpLo = getTargetShuffleNode(X86ISD::UNPCKL, dl, OpVT, N0, ZeroVec, DAG);
14909 SDValue OpHi = getTargetShuffleNode(X86ISD::UNPCKH, dl, OpVT, N0, ZeroVec, DAG);
14911 EVT HVT = EVT::getVectorVT(*DAG.getContext(), VT.getVectorElementType(),
14912 VT.getVectorNumElements()/2);
14914 OpLo = DAG.getNode(ISD::BITCAST, dl, HVT, OpLo);
14915 OpHi = DAG.getNode(ISD::BITCAST, dl, HVT, OpHi);
14917 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, OpLo, OpHi);
14925 // Optimize RES = X86ISD::SETCC CONDCODE, EFLAG_INPUT
14926 static SDValue PerformSETCCCombine(SDNode *N, SelectionDAG &DAG) {
14927 unsigned X86CC = N->getConstantOperandVal(0);
14928 SDValue EFLAG = N->getOperand(1);
14929 DebugLoc DL = N->getDebugLoc();
14931 // Materialize "setb reg" as "sbb reg,reg", since it can be extended without
14932 // a zext and produces an all-ones bit which is more useful than 0/1 in some
14934 if (X86CC == X86::COND_B)
14935 return DAG.getNode(ISD::AND, DL, MVT::i8,
14936 DAG.getNode(X86ISD::SETCC_CARRY, DL, MVT::i8,
14937 DAG.getConstant(X86CC, MVT::i8), EFLAG),
14938 DAG.getConstant(1, MVT::i8));
14943 static SDValue PerformSINT_TO_FPCombine(SDNode *N, SelectionDAG &DAG,
14944 const X86TargetLowering *XTLI) {
14945 SDValue Op0 = N->getOperand(0);
14946 // Transform (SINT_TO_FP (i64 ...)) into an x87 operation if we have
14947 // a 32-bit target where SSE doesn't support i64->FP operations.
14948 if (Op0.getOpcode() == ISD::LOAD) {
14949 LoadSDNode *Ld = cast<LoadSDNode>(Op0.getNode());
14950 EVT VT = Ld->getValueType(0);
14951 if (!Ld->isVolatile() && !N->getValueType(0).isVector() &&
14952 ISD::isNON_EXTLoad(Op0.getNode()) && Op0.hasOneUse() &&
14953 !XTLI->getSubtarget()->is64Bit() &&
14954 !DAG.getTargetLoweringInfo().isTypeLegal(VT)) {
14955 SDValue FILDChain = XTLI->BuildFILD(SDValue(N, 0), Ld->getValueType(0),
14956 Ld->getChain(), Op0, DAG);
14957 DAG.ReplaceAllUsesOfValueWith(Op0.getValue(1), FILDChain.getValue(1));
14964 // Optimize RES, EFLAGS = X86ISD::ADC LHS, RHS, EFLAGS
14965 static SDValue PerformADCCombine(SDNode *N, SelectionDAG &DAG,
14966 X86TargetLowering::DAGCombinerInfo &DCI) {
14967 // If the LHS and RHS of the ADC node are zero, then it can't overflow and
14968 // the result is either zero or one (depending on the input carry bit).
14969 // Strength reduce this down to a "set on carry" aka SETCC_CARRY&1.
14970 if (X86::isZeroNode(N->getOperand(0)) &&
14971 X86::isZeroNode(N->getOperand(1)) &&
14972 // We don't have a good way to replace an EFLAGS use, so only do this when
14974 SDValue(N, 1).use_empty()) {
14975 DebugLoc DL = N->getDebugLoc();
14976 EVT VT = N->getValueType(0);
14977 SDValue CarryOut = DAG.getConstant(0, N->getValueType(1));
14978 SDValue Res1 = DAG.getNode(ISD::AND, DL, VT,
14979 DAG.getNode(X86ISD::SETCC_CARRY, DL, VT,
14980 DAG.getConstant(X86::COND_B,MVT::i8),
14982 DAG.getConstant(1, VT));
14983 return DCI.CombineTo(N, Res1, CarryOut);
14989 // fold (add Y, (sete X, 0)) -> adc 0, Y
14990 // (add Y, (setne X, 0)) -> sbb -1, Y
14991 // (sub (sete X, 0), Y) -> sbb 0, Y
14992 // (sub (setne X, 0), Y) -> adc -1, Y
14993 static SDValue OptimizeConditionalInDecrement(SDNode *N, SelectionDAG &DAG) {
14994 DebugLoc DL = N->getDebugLoc();
14996 // Look through ZExts.
14997 SDValue Ext = N->getOperand(N->getOpcode() == ISD::SUB ? 1 : 0);
14998 if (Ext.getOpcode() != ISD::ZERO_EXTEND || !Ext.hasOneUse())
15001 SDValue SetCC = Ext.getOperand(0);
15002 if (SetCC.getOpcode() != X86ISD::SETCC || !SetCC.hasOneUse())
15005 X86::CondCode CC = (X86::CondCode)SetCC.getConstantOperandVal(0);
15006 if (CC != X86::COND_E && CC != X86::COND_NE)
15009 SDValue Cmp = SetCC.getOperand(1);
15010 if (Cmp.getOpcode() != X86ISD::CMP || !Cmp.hasOneUse() ||
15011 !X86::isZeroNode(Cmp.getOperand(1)) ||
15012 !Cmp.getOperand(0).getValueType().isInteger())
15015 SDValue CmpOp0 = Cmp.getOperand(0);
15016 SDValue NewCmp = DAG.getNode(X86ISD::CMP, DL, MVT::i32, CmpOp0,
15017 DAG.getConstant(1, CmpOp0.getValueType()));
15019 SDValue OtherVal = N->getOperand(N->getOpcode() == ISD::SUB ? 0 : 1);
15020 if (CC == X86::COND_NE)
15021 return DAG.getNode(N->getOpcode() == ISD::SUB ? X86ISD::ADC : X86ISD::SBB,
15022 DL, OtherVal.getValueType(), OtherVal,
15023 DAG.getConstant(-1ULL, OtherVal.getValueType()), NewCmp);
15024 return DAG.getNode(N->getOpcode() == ISD::SUB ? X86ISD::SBB : X86ISD::ADC,
15025 DL, OtherVal.getValueType(), OtherVal,
15026 DAG.getConstant(0, OtherVal.getValueType()), NewCmp);
15029 /// PerformADDCombine - Do target-specific dag combines on integer adds.
15030 static SDValue PerformAddCombine(SDNode *N, SelectionDAG &DAG,
15031 const X86Subtarget *Subtarget) {
15032 EVT VT = N->getValueType(0);
15033 SDValue Op0 = N->getOperand(0);
15034 SDValue Op1 = N->getOperand(1);
15036 // Try to synthesize horizontal adds from adds of shuffles.
15037 if (((Subtarget->hasSSSE3() && (VT == MVT::v8i16 || VT == MVT::v4i32)) ||
15038 (Subtarget->hasAVX2() && (VT == MVT::v16i16 || VT == MVT::v8i32))) &&
15039 isHorizontalBinOp(Op0, Op1, true))
15040 return DAG.getNode(X86ISD::HADD, N->getDebugLoc(), VT, Op0, Op1);
15042 return OptimizeConditionalInDecrement(N, DAG);
15045 static SDValue PerformSubCombine(SDNode *N, SelectionDAG &DAG,
15046 const X86Subtarget *Subtarget) {
15047 SDValue Op0 = N->getOperand(0);
15048 SDValue Op1 = N->getOperand(1);
15050 // X86 can't encode an immediate LHS of a sub. See if we can push the
15051 // negation into a preceding instruction.
15052 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op0)) {
15053 // If the RHS of the sub is a XOR with one use and a constant, invert the
15054 // immediate. Then add one to the LHS of the sub so we can turn
15055 // X-Y -> X+~Y+1, saving one register.
15056 if (Op1->hasOneUse() && Op1.getOpcode() == ISD::XOR &&
15057 isa<ConstantSDNode>(Op1.getOperand(1))) {
15058 APInt XorC = cast<ConstantSDNode>(Op1.getOperand(1))->getAPIntValue();
15059 EVT VT = Op0.getValueType();
15060 SDValue NewXor = DAG.getNode(ISD::XOR, Op1.getDebugLoc(), VT,
15062 DAG.getConstant(~XorC, VT));
15063 return DAG.getNode(ISD::ADD, N->getDebugLoc(), VT, NewXor,
15064 DAG.getConstant(C->getAPIntValue()+1, VT));
15068 // Try to synthesize horizontal adds from adds of shuffles.
15069 EVT VT = N->getValueType(0);
15070 if (((Subtarget->hasSSSE3() && (VT == MVT::v8i16 || VT == MVT::v4i32)) ||
15071 (Subtarget->hasAVX2() && (VT == MVT::v16i16 || VT == MVT::v8i32))) &&
15072 isHorizontalBinOp(Op0, Op1, true))
15073 return DAG.getNode(X86ISD::HSUB, N->getDebugLoc(), VT, Op0, Op1);
15075 return OptimizeConditionalInDecrement(N, DAG);
15078 SDValue X86TargetLowering::PerformDAGCombine(SDNode *N,
15079 DAGCombinerInfo &DCI) const {
15080 SelectionDAG &DAG = DCI.DAG;
15081 switch (N->getOpcode()) {
15083 case ISD::EXTRACT_VECTOR_ELT:
15084 return PerformEXTRACT_VECTOR_ELTCombine(N, DAG, DCI);
15086 case ISD::SELECT: return PerformSELECTCombine(N, DAG, DCI, Subtarget);
15087 case X86ISD::CMOV: return PerformCMOVCombine(N, DAG, DCI);
15088 case ISD::ADD: return PerformAddCombine(N, DAG, Subtarget);
15089 case ISD::SUB: return PerformSubCombine(N, DAG, Subtarget);
15090 case X86ISD::ADC: return PerformADCCombine(N, DAG, DCI);
15091 case ISD::MUL: return PerformMulCombine(N, DAG, DCI);
15094 case ISD::SRL: return PerformShiftCombine(N, DAG, DCI, Subtarget);
15095 case ISD::AND: return PerformAndCombine(N, DAG, DCI, Subtarget);
15096 case ISD::OR: return PerformOrCombine(N, DAG, DCI, Subtarget);
15097 case ISD::XOR: return PerformXorCombine(N, DAG, DCI, Subtarget);
15098 case ISD::LOAD: return PerformLOADCombine(N, DAG, Subtarget);
15099 case ISD::STORE: return PerformSTORECombine(N, DAG, Subtarget);
15100 case ISD::SINT_TO_FP: return PerformSINT_TO_FPCombine(N, DAG, this);
15101 case ISD::FADD: return PerformFADDCombine(N, DAG, Subtarget);
15102 case ISD::FSUB: return PerformFSUBCombine(N, DAG, Subtarget);
15104 case X86ISD::FOR: return PerformFORCombine(N, DAG);
15105 case X86ISD::FAND: return PerformFANDCombine(N, DAG);
15106 case X86ISD::BT: return PerformBTCombine(N, DAG, DCI);
15107 case X86ISD::VZEXT_MOVL: return PerformVZEXT_MOVLCombine(N, DAG);
15108 case ISD::ZERO_EXTEND: return PerformZExtCombine(N, DAG, Subtarget);
15109 case ISD::SIGN_EXTEND: return PerformSExtCombine(N, DAG, DCI, Subtarget);
15110 case ISD::TRUNCATE: return PerformTruncateCombine(N, DAG, DCI);
15111 case X86ISD::SETCC: return PerformSETCCCombine(N, DAG);
15112 case X86ISD::SHUFP: // Handle all target specific shuffles
15113 case X86ISD::PALIGN:
15114 case X86ISD::UNPCKH:
15115 case X86ISD::UNPCKL:
15116 case X86ISD::MOVHLPS:
15117 case X86ISD::MOVLHPS:
15118 case X86ISD::PSHUFD:
15119 case X86ISD::PSHUFHW:
15120 case X86ISD::PSHUFLW:
15121 case X86ISD::MOVSS:
15122 case X86ISD::MOVSD:
15123 case X86ISD::VPERMILP:
15124 case X86ISD::VPERM2X128:
15125 case ISD::VECTOR_SHUFFLE: return PerformShuffleCombine(N, DAG, DCI,Subtarget);
15131 /// isTypeDesirableForOp - Return true if the target has native support for
15132 /// the specified value type and it is 'desirable' to use the type for the
15133 /// given node type. e.g. On x86 i16 is legal, but undesirable since i16
15134 /// instruction encodings are longer and some i16 instructions are slow.
15135 bool X86TargetLowering::isTypeDesirableForOp(unsigned Opc, EVT VT) const {
15136 if (!isTypeLegal(VT))
15138 if (VT != MVT::i16)
15145 case ISD::SIGN_EXTEND:
15146 case ISD::ZERO_EXTEND:
15147 case ISD::ANY_EXTEND:
15160 /// IsDesirableToPromoteOp - This method query the target whether it is
15161 /// beneficial for dag combiner to promote the specified node. If true, it
15162 /// should return the desired promotion type by reference.
15163 bool X86TargetLowering::IsDesirableToPromoteOp(SDValue Op, EVT &PVT) const {
15164 EVT VT = Op.getValueType();
15165 if (VT != MVT::i16)
15168 bool Promote = false;
15169 bool Commute = false;
15170 switch (Op.getOpcode()) {
15173 LoadSDNode *LD = cast<LoadSDNode>(Op);
15174 // If the non-extending load has a single use and it's not live out, then it
15175 // might be folded.
15176 if (LD->getExtensionType() == ISD::NON_EXTLOAD /*&&
15177 Op.hasOneUse()*/) {
15178 for (SDNode::use_iterator UI = Op.getNode()->use_begin(),
15179 UE = Op.getNode()->use_end(); UI != UE; ++UI) {
15180 // The only case where we'd want to promote LOAD (rather then it being
15181 // promoted as an operand is when it's only use is liveout.
15182 if (UI->getOpcode() != ISD::CopyToReg)
15189 case ISD::SIGN_EXTEND:
15190 case ISD::ZERO_EXTEND:
15191 case ISD::ANY_EXTEND:
15196 SDValue N0 = Op.getOperand(0);
15197 // Look out for (store (shl (load), x)).
15198 if (MayFoldLoad(N0) && MayFoldIntoStore(Op))
15211 SDValue N0 = Op.getOperand(0);
15212 SDValue N1 = Op.getOperand(1);
15213 if (!Commute && MayFoldLoad(N1))
15215 // Avoid disabling potential load folding opportunities.
15216 if (MayFoldLoad(N0) && (!isa<ConstantSDNode>(N1) || MayFoldIntoStore(Op)))
15218 if (MayFoldLoad(N1) && (!isa<ConstantSDNode>(N0) || MayFoldIntoStore(Op)))
15228 //===----------------------------------------------------------------------===//
15229 // X86 Inline Assembly Support
15230 //===----------------------------------------------------------------------===//
15233 // Helper to match a string separated by whitespace.
15234 bool matchAsmImpl(StringRef s, ArrayRef<const StringRef *> args) {
15235 s = s.substr(s.find_first_not_of(" \t")); // Skip leading whitespace.
15237 for (unsigned i = 0, e = args.size(); i != e; ++i) {
15238 StringRef piece(*args[i]);
15239 if (!s.startswith(piece)) // Check if the piece matches.
15242 s = s.substr(piece.size());
15243 StringRef::size_type pos = s.find_first_not_of(" \t");
15244 if (pos == 0) // We matched a prefix.
15252 const VariadicFunction1<bool, StringRef, StringRef, matchAsmImpl> matchAsm={};
15255 bool X86TargetLowering::ExpandInlineAsm(CallInst *CI) const {
15256 InlineAsm *IA = cast<InlineAsm>(CI->getCalledValue());
15258 std::string AsmStr = IA->getAsmString();
15260 IntegerType *Ty = dyn_cast<IntegerType>(CI->getType());
15261 if (!Ty || Ty->getBitWidth() % 16 != 0)
15264 // TODO: should remove alternatives from the asmstring: "foo {a|b}" -> "foo a"
15265 SmallVector<StringRef, 4> AsmPieces;
15266 SplitString(AsmStr, AsmPieces, ";\n");
15268 switch (AsmPieces.size()) {
15269 default: return false;
15271 // FIXME: this should verify that we are targeting a 486 or better. If not,
15272 // we will turn this bswap into something that will be lowered to logical
15273 // ops instead of emitting the bswap asm. For now, we don't support 486 or
15274 // lower so don't worry about this.
15276 if (matchAsm(AsmPieces[0], "bswap", "$0") ||
15277 matchAsm(AsmPieces[0], "bswapl", "$0") ||
15278 matchAsm(AsmPieces[0], "bswapq", "$0") ||
15279 matchAsm(AsmPieces[0], "bswap", "${0:q}") ||
15280 matchAsm(AsmPieces[0], "bswapl", "${0:q}") ||
15281 matchAsm(AsmPieces[0], "bswapq", "${0:q}")) {
15282 // No need to check constraints, nothing other than the equivalent of
15283 // "=r,0" would be valid here.
15284 return IntrinsicLowering::LowerToByteSwap(CI);
15287 // rorw $$8, ${0:w} --> llvm.bswap.i16
15288 if (CI->getType()->isIntegerTy(16) &&
15289 IA->getConstraintString().compare(0, 5, "=r,0,") == 0 &&
15290 (matchAsm(AsmPieces[0], "rorw", "$$8,", "${0:w}") ||
15291 matchAsm(AsmPieces[0], "rolw", "$$8,", "${0:w}"))) {
15293 const std::string &ConstraintsStr = IA->getConstraintString();
15294 SplitString(StringRef(ConstraintsStr).substr(5), AsmPieces, ",");
15295 std::sort(AsmPieces.begin(), AsmPieces.end());
15296 if (AsmPieces.size() == 4 &&
15297 AsmPieces[0] == "~{cc}" &&
15298 AsmPieces[1] == "~{dirflag}" &&
15299 AsmPieces[2] == "~{flags}" &&
15300 AsmPieces[3] == "~{fpsr}")
15301 return IntrinsicLowering::LowerToByteSwap(CI);
15305 if (CI->getType()->isIntegerTy(32) &&
15306 IA->getConstraintString().compare(0, 5, "=r,0,") == 0 &&
15307 matchAsm(AsmPieces[0], "rorw", "$$8,", "${0:w}") &&
15308 matchAsm(AsmPieces[1], "rorl", "$$16,", "$0") &&
15309 matchAsm(AsmPieces[2], "rorw", "$$8,", "${0:w}")) {
15311 const std::string &ConstraintsStr = IA->getConstraintString();
15312 SplitString(StringRef(ConstraintsStr).substr(5), AsmPieces, ",");
15313 std::sort(AsmPieces.begin(), AsmPieces.end());
15314 if (AsmPieces.size() == 4 &&
15315 AsmPieces[0] == "~{cc}" &&
15316 AsmPieces[1] == "~{dirflag}" &&
15317 AsmPieces[2] == "~{flags}" &&
15318 AsmPieces[3] == "~{fpsr}")
15319 return IntrinsicLowering::LowerToByteSwap(CI);
15322 if (CI->getType()->isIntegerTy(64)) {
15323 InlineAsm::ConstraintInfoVector Constraints = IA->ParseConstraints();
15324 if (Constraints.size() >= 2 &&
15325 Constraints[0].Codes.size() == 1 && Constraints[0].Codes[0] == "A" &&
15326 Constraints[1].Codes.size() == 1 && Constraints[1].Codes[0] == "0") {
15327 // bswap %eax / bswap %edx / xchgl %eax, %edx -> llvm.bswap.i64
15328 if (matchAsm(AsmPieces[0], "bswap", "%eax") &&
15329 matchAsm(AsmPieces[1], "bswap", "%edx") &&
15330 matchAsm(AsmPieces[2], "xchgl", "%eax,", "%edx"))
15331 return IntrinsicLowering::LowerToByteSwap(CI);
15341 /// getConstraintType - Given a constraint letter, return the type of
15342 /// constraint it is for this target.
15343 X86TargetLowering::ConstraintType
15344 X86TargetLowering::getConstraintType(const std::string &Constraint) const {
15345 if (Constraint.size() == 1) {
15346 switch (Constraint[0]) {
15357 return C_RegisterClass;
15381 return TargetLowering::getConstraintType(Constraint);
15384 /// Examine constraint type and operand type and determine a weight value.
15385 /// This object must already have been set up with the operand type
15386 /// and the current alternative constraint selected.
15387 TargetLowering::ConstraintWeight
15388 X86TargetLowering::getSingleConstraintMatchWeight(
15389 AsmOperandInfo &info, const char *constraint) const {
15390 ConstraintWeight weight = CW_Invalid;
15391 Value *CallOperandVal = info.CallOperandVal;
15392 // If we don't have a value, we can't do a match,
15393 // but allow it at the lowest weight.
15394 if (CallOperandVal == NULL)
15396 Type *type = CallOperandVal->getType();
15397 // Look at the constraint type.
15398 switch (*constraint) {
15400 weight = TargetLowering::getSingleConstraintMatchWeight(info, constraint);
15411 if (CallOperandVal->getType()->isIntegerTy())
15412 weight = CW_SpecificReg;
15417 if (type->isFloatingPointTy())
15418 weight = CW_SpecificReg;
15421 if (type->isX86_MMXTy() && Subtarget->hasMMX())
15422 weight = CW_SpecificReg;
15426 if (((type->getPrimitiveSizeInBits() == 128) && Subtarget->hasSSE1()) ||
15427 ((type->getPrimitiveSizeInBits() == 256) && Subtarget->hasAVX()))
15428 weight = CW_Register;
15431 if (ConstantInt *C = dyn_cast<ConstantInt>(info.CallOperandVal)) {
15432 if (C->getZExtValue() <= 31)
15433 weight = CW_Constant;
15437 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
15438 if (C->getZExtValue() <= 63)
15439 weight = CW_Constant;
15443 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
15444 if ((C->getSExtValue() >= -0x80) && (C->getSExtValue() <= 0x7f))
15445 weight = CW_Constant;
15449 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
15450 if ((C->getZExtValue() == 0xff) || (C->getZExtValue() == 0xffff))
15451 weight = CW_Constant;
15455 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
15456 if (C->getZExtValue() <= 3)
15457 weight = CW_Constant;
15461 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
15462 if (C->getZExtValue() <= 0xff)
15463 weight = CW_Constant;
15468 if (dyn_cast<ConstantFP>(CallOperandVal)) {
15469 weight = CW_Constant;
15473 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
15474 if ((C->getSExtValue() >= -0x80000000LL) &&
15475 (C->getSExtValue() <= 0x7fffffffLL))
15476 weight = CW_Constant;
15480 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
15481 if (C->getZExtValue() <= 0xffffffff)
15482 weight = CW_Constant;
15489 /// LowerXConstraint - try to replace an X constraint, which matches anything,
15490 /// with another that has more specific requirements based on the type of the
15491 /// corresponding operand.
15492 const char *X86TargetLowering::
15493 LowerXConstraint(EVT ConstraintVT) const {
15494 // FP X constraints get lowered to SSE1/2 registers if available, otherwise
15495 // 'f' like normal targets.
15496 if (ConstraintVT.isFloatingPoint()) {
15497 if (Subtarget->hasSSE2())
15499 if (Subtarget->hasSSE1())
15503 return TargetLowering::LowerXConstraint(ConstraintVT);
15506 /// LowerAsmOperandForConstraint - Lower the specified operand into the Ops
15507 /// vector. If it is invalid, don't add anything to Ops.
15508 void X86TargetLowering::LowerAsmOperandForConstraint(SDValue Op,
15509 std::string &Constraint,
15510 std::vector<SDValue>&Ops,
15511 SelectionDAG &DAG) const {
15512 SDValue Result(0, 0);
15514 // Only support length 1 constraints for now.
15515 if (Constraint.length() > 1) return;
15517 char ConstraintLetter = Constraint[0];
15518 switch (ConstraintLetter) {
15521 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
15522 if (C->getZExtValue() <= 31) {
15523 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
15529 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
15530 if (C->getZExtValue() <= 63) {
15531 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
15537 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
15538 if ((int8_t)C->getSExtValue() == C->getSExtValue()) {
15539 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
15545 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
15546 if (C->getZExtValue() <= 255) {
15547 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
15553 // 32-bit signed value
15554 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
15555 if (ConstantInt::isValueValidForType(Type::getInt32Ty(*DAG.getContext()),
15556 C->getSExtValue())) {
15557 // Widen to 64 bits here to get it sign extended.
15558 Result = DAG.getTargetConstant(C->getSExtValue(), MVT::i64);
15561 // FIXME gcc accepts some relocatable values here too, but only in certain
15562 // memory models; it's complicated.
15567 // 32-bit unsigned value
15568 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
15569 if (ConstantInt::isValueValidForType(Type::getInt32Ty(*DAG.getContext()),
15570 C->getZExtValue())) {
15571 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
15575 // FIXME gcc accepts some relocatable values here too, but only in certain
15576 // memory models; it's complicated.
15580 // Literal immediates are always ok.
15581 if (ConstantSDNode *CST = dyn_cast<ConstantSDNode>(Op)) {
15582 // Widen to 64 bits here to get it sign extended.
15583 Result = DAG.getTargetConstant(CST->getSExtValue(), MVT::i64);
15587 // In any sort of PIC mode addresses need to be computed at runtime by
15588 // adding in a register or some sort of table lookup. These can't
15589 // be used as immediates.
15590 if (Subtarget->isPICStyleGOT() || Subtarget->isPICStyleStubPIC())
15593 // If we are in non-pic codegen mode, we allow the address of a global (with
15594 // an optional displacement) to be used with 'i'.
15595 GlobalAddressSDNode *GA = 0;
15596 int64_t Offset = 0;
15598 // Match either (GA), (GA+C), (GA+C1+C2), etc.
15600 if ((GA = dyn_cast<GlobalAddressSDNode>(Op))) {
15601 Offset += GA->getOffset();
15603 } else if (Op.getOpcode() == ISD::ADD) {
15604 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op.getOperand(1))) {
15605 Offset += C->getZExtValue();
15606 Op = Op.getOperand(0);
15609 } else if (Op.getOpcode() == ISD::SUB) {
15610 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op.getOperand(1))) {
15611 Offset += -C->getZExtValue();
15612 Op = Op.getOperand(0);
15617 // Otherwise, this isn't something we can handle, reject it.
15621 const GlobalValue *GV = GA->getGlobal();
15622 // If we require an extra load to get this address, as in PIC mode, we
15623 // can't accept it.
15624 if (isGlobalStubReference(Subtarget->ClassifyGlobalReference(GV,
15625 getTargetMachine())))
15628 Result = DAG.getTargetGlobalAddress(GV, Op.getDebugLoc(),
15629 GA->getValueType(0), Offset);
15634 if (Result.getNode()) {
15635 Ops.push_back(Result);
15638 return TargetLowering::LowerAsmOperandForConstraint(Op, Constraint, Ops, DAG);
15641 std::pair<unsigned, const TargetRegisterClass*>
15642 X86TargetLowering::getRegForInlineAsmConstraint(const std::string &Constraint,
15644 // First, see if this is a constraint that directly corresponds to an LLVM
15646 if (Constraint.size() == 1) {
15647 // GCC Constraint Letters
15648 switch (Constraint[0]) {
15650 // TODO: Slight differences here in allocation order and leaving
15651 // RIP in the class. Do they matter any more here than they do
15652 // in the normal allocation?
15653 case 'q': // GENERAL_REGS in 64-bit mode, Q_REGS in 32-bit mode.
15654 if (Subtarget->is64Bit()) {
15655 if (VT == MVT::i32 || VT == MVT::f32)
15656 return std::make_pair(0U, X86::GR32RegisterClass);
15657 else if (VT == MVT::i16)
15658 return std::make_pair(0U, X86::GR16RegisterClass);
15659 else if (VT == MVT::i8 || VT == MVT::i1)
15660 return std::make_pair(0U, X86::GR8RegisterClass);
15661 else if (VT == MVT::i64 || VT == MVT::f64)
15662 return std::make_pair(0U, X86::GR64RegisterClass);
15665 // 32-bit fallthrough
15666 case 'Q': // Q_REGS
15667 if (VT == MVT::i32 || VT == MVT::f32)
15668 return std::make_pair(0U, X86::GR32_ABCDRegisterClass);
15669 else if (VT == MVT::i16)
15670 return std::make_pair(0U, X86::GR16_ABCDRegisterClass);
15671 else if (VT == MVT::i8 || VT == MVT::i1)
15672 return std::make_pair(0U, X86::GR8_ABCD_LRegisterClass);
15673 else if (VT == MVT::i64)
15674 return std::make_pair(0U, X86::GR64_ABCDRegisterClass);
15676 case 'r': // GENERAL_REGS
15677 case 'l': // INDEX_REGS
15678 if (VT == MVT::i8 || VT == MVT::i1)
15679 return std::make_pair(0U, X86::GR8RegisterClass);
15680 if (VT == MVT::i16)
15681 return std::make_pair(0U, X86::GR16RegisterClass);
15682 if (VT == MVT::i32 || VT == MVT::f32 || !Subtarget->is64Bit())
15683 return std::make_pair(0U, X86::GR32RegisterClass);
15684 return std::make_pair(0U, X86::GR64RegisterClass);
15685 case 'R': // LEGACY_REGS
15686 if (VT == MVT::i8 || VT == MVT::i1)
15687 return std::make_pair(0U, X86::GR8_NOREXRegisterClass);
15688 if (VT == MVT::i16)
15689 return std::make_pair(0U, X86::GR16_NOREXRegisterClass);
15690 if (VT == MVT::i32 || !Subtarget->is64Bit())
15691 return std::make_pair(0U, X86::GR32_NOREXRegisterClass);
15692 return std::make_pair(0U, X86::GR64_NOREXRegisterClass);
15693 case 'f': // FP Stack registers.
15694 // If SSE is enabled for this VT, use f80 to ensure the isel moves the
15695 // value to the correct fpstack register class.
15696 if (VT == MVT::f32 && !isScalarFPTypeInSSEReg(VT))
15697 return std::make_pair(0U, X86::RFP32RegisterClass);
15698 if (VT == MVT::f64 && !isScalarFPTypeInSSEReg(VT))
15699 return std::make_pair(0U, X86::RFP64RegisterClass);
15700 return std::make_pair(0U, X86::RFP80RegisterClass);
15701 case 'y': // MMX_REGS if MMX allowed.
15702 if (!Subtarget->hasMMX()) break;
15703 return std::make_pair(0U, X86::VR64RegisterClass);
15704 case 'Y': // SSE_REGS if SSE2 allowed
15705 if (!Subtarget->hasSSE2()) break;
15707 case 'x': // SSE_REGS if SSE1 allowed or AVX_REGS if AVX allowed
15708 if (!Subtarget->hasSSE1()) break;
15710 switch (VT.getSimpleVT().SimpleTy) {
15712 // Scalar SSE types.
15715 return std::make_pair(0U, X86::FR32RegisterClass);
15718 return std::make_pair(0U, X86::FR64RegisterClass);
15726 return std::make_pair(0U, X86::VR128RegisterClass);
15734 return std::make_pair(0U, X86::VR256RegisterClass);
15741 // Use the default implementation in TargetLowering to convert the register
15742 // constraint into a member of a register class.
15743 std::pair<unsigned, const TargetRegisterClass*> Res;
15744 Res = TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
15746 // Not found as a standard register?
15747 if (Res.second == 0) {
15748 // Map st(0) -> st(7) -> ST0
15749 if (Constraint.size() == 7 && Constraint[0] == '{' &&
15750 tolower(Constraint[1]) == 's' &&
15751 tolower(Constraint[2]) == 't' &&
15752 Constraint[3] == '(' &&
15753 (Constraint[4] >= '0' && Constraint[4] <= '7') &&
15754 Constraint[5] == ')' &&
15755 Constraint[6] == '}') {
15757 Res.first = X86::ST0+Constraint[4]-'0';
15758 Res.second = X86::RFP80RegisterClass;
15762 // GCC allows "st(0)" to be called just plain "st".
15763 if (StringRef("{st}").equals_lower(Constraint)) {
15764 Res.first = X86::ST0;
15765 Res.second = X86::RFP80RegisterClass;
15770 if (StringRef("{flags}").equals_lower(Constraint)) {
15771 Res.first = X86::EFLAGS;
15772 Res.second = X86::CCRRegisterClass;
15776 // 'A' means EAX + EDX.
15777 if (Constraint == "A") {
15778 Res.first = X86::EAX;
15779 Res.second = X86::GR32_ADRegisterClass;
15785 // Otherwise, check to see if this is a register class of the wrong value
15786 // type. For example, we want to map "{ax},i32" -> {eax}, we don't want it to
15787 // turn into {ax},{dx}.
15788 if (Res.second->hasType(VT))
15789 return Res; // Correct type already, nothing to do.
15791 // All of the single-register GCC register classes map their values onto
15792 // 16-bit register pieces "ax","dx","cx","bx","si","di","bp","sp". If we
15793 // really want an 8-bit or 32-bit register, map to the appropriate register
15794 // class and return the appropriate register.
15795 if (Res.second == X86::GR16RegisterClass) {
15796 if (VT == MVT::i8) {
15797 unsigned DestReg = 0;
15798 switch (Res.first) {
15800 case X86::AX: DestReg = X86::AL; break;
15801 case X86::DX: DestReg = X86::DL; break;
15802 case X86::CX: DestReg = X86::CL; break;
15803 case X86::BX: DestReg = X86::BL; break;
15806 Res.first = DestReg;
15807 Res.second = X86::GR8RegisterClass;
15809 } else if (VT == MVT::i32) {
15810 unsigned DestReg = 0;
15811 switch (Res.first) {
15813 case X86::AX: DestReg = X86::EAX; break;
15814 case X86::DX: DestReg = X86::EDX; break;
15815 case X86::CX: DestReg = X86::ECX; break;
15816 case X86::BX: DestReg = X86::EBX; break;
15817 case X86::SI: DestReg = X86::ESI; break;
15818 case X86::DI: DestReg = X86::EDI; break;
15819 case X86::BP: DestReg = X86::EBP; break;
15820 case X86::SP: DestReg = X86::ESP; break;
15823 Res.first = DestReg;
15824 Res.second = X86::GR32RegisterClass;
15826 } else if (VT == MVT::i64) {
15827 unsigned DestReg = 0;
15828 switch (Res.first) {
15830 case X86::AX: DestReg = X86::RAX; break;
15831 case X86::DX: DestReg = X86::RDX; break;
15832 case X86::CX: DestReg = X86::RCX; break;
15833 case X86::BX: DestReg = X86::RBX; break;
15834 case X86::SI: DestReg = X86::RSI; break;
15835 case X86::DI: DestReg = X86::RDI; break;
15836 case X86::BP: DestReg = X86::RBP; break;
15837 case X86::SP: DestReg = X86::RSP; break;
15840 Res.first = DestReg;
15841 Res.second = X86::GR64RegisterClass;
15844 } else if (Res.second == X86::FR32RegisterClass ||
15845 Res.second == X86::FR64RegisterClass ||
15846 Res.second == X86::VR128RegisterClass) {
15847 // Handle references to XMM physical registers that got mapped into the
15848 // wrong class. This can happen with constraints like {xmm0} where the
15849 // target independent register mapper will just pick the first match it can
15850 // find, ignoring the required type.
15851 if (VT == MVT::f32)
15852 Res.second = X86::FR32RegisterClass;
15853 else if (VT == MVT::f64)
15854 Res.second = X86::FR64RegisterClass;
15855 else if (X86::VR128RegisterClass->hasType(VT))
15856 Res.second = X86::VR128RegisterClass;