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"
17 #include "X86InstrBuilder.h"
18 #include "X86ISelLowering.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/BitVector.h"
43 #include "llvm/ADT/SmallSet.h"
44 #include "llvm/ADT/Statistic.h"
45 #include "llvm/ADT/StringExtras.h"
46 #include "llvm/ADT/VariadicFunction.h"
47 #include "llvm/Support/CallSite.h"
48 #include "llvm/Support/Debug.h"
49 #include "llvm/Support/Dwarf.h"
50 #include "llvm/Support/ErrorHandling.h"
51 #include "llvm/Support/MathExtras.h"
52 #include "llvm/Support/raw_ostream.h"
53 #include "llvm/Target/TargetOptions.h"
55 using namespace dwarf;
57 STATISTIC(NumTailCalls, "Number of tail calls");
59 // Forward declarations.
60 static SDValue getMOVL(SelectionDAG &DAG, DebugLoc dl, EVT VT, SDValue V1,
63 static SDValue Insert128BitVector(SDValue Result,
69 static SDValue Extract128BitVector(SDValue Vec,
74 /// Generate a DAG to grab 128-bits from a vector > 128 bits. This
75 /// sets things up to match to an AVX VEXTRACTF128 instruction or a
76 /// simple subregister reference. Idx is an index in the 128 bits we
77 /// want. It need not be aligned to a 128-bit bounday. That makes
78 /// lowering EXTRACT_VECTOR_ELT operations easier.
79 static SDValue Extract128BitVector(SDValue Vec,
83 EVT VT = Vec.getValueType();
84 assert(VT.getSizeInBits() == 256 && "Unexpected vector size!");
85 EVT ElVT = VT.getVectorElementType();
86 int Factor = VT.getSizeInBits()/128;
87 EVT ResultVT = EVT::getVectorVT(*DAG.getContext(), ElVT,
88 VT.getVectorNumElements()/Factor);
90 // Extract from UNDEF is UNDEF.
91 if (Vec.getOpcode() == ISD::UNDEF)
92 return DAG.getNode(ISD::UNDEF, dl, ResultVT);
94 if (isa<ConstantSDNode>(Idx)) {
95 unsigned IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
97 // Extract the relevant 128 bits. Generate an EXTRACT_SUBVECTOR
98 // we can match to VEXTRACTF128.
99 unsigned ElemsPerChunk = 128 / ElVT.getSizeInBits();
101 // This is the index of the first element of the 128-bit chunk
103 unsigned NormalizedIdxVal = (((IdxVal * ElVT.getSizeInBits()) / 128)
106 SDValue VecIdx = DAG.getConstant(NormalizedIdxVal, MVT::i32);
107 SDValue Result = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, ResultVT, Vec,
116 /// Generate a DAG to put 128-bits into a vector > 128 bits. This
117 /// sets things up to match to an AVX VINSERTF128 instruction or a
118 /// simple superregister reference. Idx is an index in the 128 bits
119 /// we want. It need not be aligned to a 128-bit bounday. That makes
120 /// lowering INSERT_VECTOR_ELT operations easier.
121 static SDValue Insert128BitVector(SDValue Result,
126 if (isa<ConstantSDNode>(Idx)) {
127 EVT VT = Vec.getValueType();
128 assert(VT.getSizeInBits() == 128 && "Unexpected vector size!");
130 EVT ElVT = VT.getVectorElementType();
131 unsigned IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
132 EVT ResultVT = Result.getValueType();
134 // Insert the relevant 128 bits.
135 unsigned ElemsPerChunk = 128/ElVT.getSizeInBits();
137 // This is the index of the first element of the 128-bit chunk
139 unsigned NormalizedIdxVal = (((IdxVal * ElVT.getSizeInBits())/128)
142 SDValue VecIdx = DAG.getConstant(NormalizedIdxVal, MVT::i32);
143 Result = DAG.getNode(ISD::INSERT_SUBVECTOR, dl, ResultVT, Result, Vec,
151 static TargetLoweringObjectFile *createTLOF(X86TargetMachine &TM) {
152 const X86Subtarget *Subtarget = &TM.getSubtarget<X86Subtarget>();
153 bool is64Bit = Subtarget->is64Bit();
155 if (Subtarget->isTargetEnvMacho()) {
157 return new X8664_MachoTargetObjectFile();
158 return new TargetLoweringObjectFileMachO();
161 if (Subtarget->isTargetELF())
162 return new TargetLoweringObjectFileELF();
163 if (Subtarget->isTargetCOFF() && !Subtarget->isTargetEnvMacho())
164 return new TargetLoweringObjectFileCOFF();
165 llvm_unreachable("unknown subtarget type");
168 X86TargetLowering::X86TargetLowering(X86TargetMachine &TM)
169 : TargetLowering(TM, createTLOF(TM)) {
170 Subtarget = &TM.getSubtarget<X86Subtarget>();
171 X86ScalarSSEf64 = Subtarget->hasSSE2();
172 X86ScalarSSEf32 = Subtarget->hasSSE1();
173 X86StackPtr = Subtarget->is64Bit() ? X86::RSP : X86::ESP;
175 RegInfo = TM.getRegisterInfo();
176 TD = getTargetData();
178 // Set up the TargetLowering object.
179 static MVT IntVTs[] = { MVT::i8, MVT::i16, MVT::i32, MVT::i64 };
181 // X86 is weird, it always uses i8 for shift amounts and setcc results.
182 setBooleanContents(ZeroOrOneBooleanContent);
183 // X86-SSE is even stranger. It uses -1 or 0 for vector masks.
184 setBooleanVectorContents(ZeroOrNegativeOneBooleanContent);
186 // For 64-bit since we have so many registers use the ILP scheduler, for
187 // 32-bit code use the register pressure specific scheduling.
188 if (Subtarget->is64Bit())
189 setSchedulingPreference(Sched::ILP);
191 setSchedulingPreference(Sched::RegPressure);
192 setStackPointerRegisterToSaveRestore(X86StackPtr);
194 if (Subtarget->isTargetWindows() && !Subtarget->isTargetCygMing()) {
195 // Setup Windows compiler runtime calls.
196 setLibcallName(RTLIB::SDIV_I64, "_alldiv");
197 setLibcallName(RTLIB::UDIV_I64, "_aulldiv");
198 setLibcallName(RTLIB::SREM_I64, "_allrem");
199 setLibcallName(RTLIB::UREM_I64, "_aullrem");
200 setLibcallName(RTLIB::MUL_I64, "_allmul");
201 setLibcallName(RTLIB::FPTOUINT_F64_I64, "_ftol2");
202 setLibcallName(RTLIB::FPTOUINT_F32_I64, "_ftol2");
203 setLibcallCallingConv(RTLIB::SDIV_I64, CallingConv::X86_StdCall);
204 setLibcallCallingConv(RTLIB::UDIV_I64, CallingConv::X86_StdCall);
205 setLibcallCallingConv(RTLIB::SREM_I64, CallingConv::X86_StdCall);
206 setLibcallCallingConv(RTLIB::UREM_I64, CallingConv::X86_StdCall);
207 setLibcallCallingConv(RTLIB::MUL_I64, CallingConv::X86_StdCall);
208 setLibcallCallingConv(RTLIB::FPTOUINT_F64_I64, CallingConv::C);
209 setLibcallCallingConv(RTLIB::FPTOUINT_F32_I64, CallingConv::C);
212 if (Subtarget->isTargetDarwin()) {
213 // Darwin should use _setjmp/_longjmp instead of setjmp/longjmp.
214 setUseUnderscoreSetJmp(false);
215 setUseUnderscoreLongJmp(false);
216 } else if (Subtarget->isTargetMingw()) {
217 // MS runtime is weird: it exports _setjmp, but longjmp!
218 setUseUnderscoreSetJmp(true);
219 setUseUnderscoreLongJmp(false);
221 setUseUnderscoreSetJmp(true);
222 setUseUnderscoreLongJmp(true);
225 // Set up the register classes.
226 addRegisterClass(MVT::i8, X86::GR8RegisterClass);
227 addRegisterClass(MVT::i16, X86::GR16RegisterClass);
228 addRegisterClass(MVT::i32, X86::GR32RegisterClass);
229 if (Subtarget->is64Bit())
230 addRegisterClass(MVT::i64, X86::GR64RegisterClass);
232 setLoadExtAction(ISD::SEXTLOAD, MVT::i1, Promote);
234 // We don't accept any truncstore of integer registers.
235 setTruncStoreAction(MVT::i64, MVT::i32, Expand);
236 setTruncStoreAction(MVT::i64, MVT::i16, Expand);
237 setTruncStoreAction(MVT::i64, MVT::i8 , Expand);
238 setTruncStoreAction(MVT::i32, MVT::i16, Expand);
239 setTruncStoreAction(MVT::i32, MVT::i8 , Expand);
240 setTruncStoreAction(MVT::i16, MVT::i8, Expand);
242 // SETOEQ and SETUNE require checking two conditions.
243 setCondCodeAction(ISD::SETOEQ, MVT::f32, Expand);
244 setCondCodeAction(ISD::SETOEQ, MVT::f64, Expand);
245 setCondCodeAction(ISD::SETOEQ, MVT::f80, Expand);
246 setCondCodeAction(ISD::SETUNE, MVT::f32, Expand);
247 setCondCodeAction(ISD::SETUNE, MVT::f64, Expand);
248 setCondCodeAction(ISD::SETUNE, MVT::f80, Expand);
250 // Promote all UINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have this
252 setOperationAction(ISD::UINT_TO_FP , MVT::i1 , Promote);
253 setOperationAction(ISD::UINT_TO_FP , MVT::i8 , Promote);
254 setOperationAction(ISD::UINT_TO_FP , MVT::i16 , Promote);
256 if (Subtarget->is64Bit()) {
257 setOperationAction(ISD::UINT_TO_FP , MVT::i32 , Promote);
258 setOperationAction(ISD::UINT_TO_FP , MVT::i64 , Custom);
259 } else if (!TM.Options.UseSoftFloat) {
260 // We have an algorithm for SSE2->double, and we turn this into a
261 // 64-bit FILD followed by conditional FADD for other targets.
262 setOperationAction(ISD::UINT_TO_FP , MVT::i64 , Custom);
263 // We have an algorithm for SSE2, and we turn this into a 64-bit
264 // FILD for other targets.
265 setOperationAction(ISD::UINT_TO_FP , MVT::i32 , Custom);
268 // Promote i1/i8 SINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have
270 setOperationAction(ISD::SINT_TO_FP , MVT::i1 , Promote);
271 setOperationAction(ISD::SINT_TO_FP , MVT::i8 , Promote);
273 if (!TM.Options.UseSoftFloat) {
274 // SSE has no i16 to fp conversion, only i32
275 if (X86ScalarSSEf32) {
276 setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Promote);
277 // f32 and f64 cases are Legal, f80 case is not
278 setOperationAction(ISD::SINT_TO_FP , MVT::i32 , Custom);
280 setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Custom);
281 setOperationAction(ISD::SINT_TO_FP , MVT::i32 , Custom);
284 setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Promote);
285 setOperationAction(ISD::SINT_TO_FP , MVT::i32 , Promote);
288 // In 32-bit mode these are custom lowered. In 64-bit mode F32 and F64
289 // are Legal, f80 is custom lowered.
290 setOperationAction(ISD::FP_TO_SINT , MVT::i64 , Custom);
291 setOperationAction(ISD::SINT_TO_FP , MVT::i64 , Custom);
293 // Promote i1/i8 FP_TO_SINT to larger FP_TO_SINTS's, as X86 doesn't have
295 setOperationAction(ISD::FP_TO_SINT , MVT::i1 , Promote);
296 setOperationAction(ISD::FP_TO_SINT , MVT::i8 , Promote);
298 if (X86ScalarSSEf32) {
299 setOperationAction(ISD::FP_TO_SINT , MVT::i16 , Promote);
300 // f32 and f64 cases are Legal, f80 case is not
301 setOperationAction(ISD::FP_TO_SINT , MVT::i32 , Custom);
303 setOperationAction(ISD::FP_TO_SINT , MVT::i16 , Custom);
304 setOperationAction(ISD::FP_TO_SINT , MVT::i32 , Custom);
307 // Handle FP_TO_UINT by promoting the destination to a larger signed
309 setOperationAction(ISD::FP_TO_UINT , MVT::i1 , Promote);
310 setOperationAction(ISD::FP_TO_UINT , MVT::i8 , Promote);
311 setOperationAction(ISD::FP_TO_UINT , MVT::i16 , Promote);
313 if (Subtarget->is64Bit()) {
314 setOperationAction(ISD::FP_TO_UINT , MVT::i64 , Expand);
315 setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Promote);
316 } else if (!TM.Options.UseSoftFloat) {
317 // Since AVX is a superset of SSE3, only check for SSE here.
318 if (Subtarget->hasSSE1() && !Subtarget->hasSSE3())
319 // Expand FP_TO_UINT into a select.
320 // FIXME: We would like to use a Custom expander here eventually to do
321 // the optimal thing for SSE vs. the default expansion in the legalizer.
322 setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Expand);
324 // With SSE3 we can use fisttpll to convert to a signed i64; without
325 // SSE, we're stuck with a fistpll.
326 setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Custom);
329 // TODO: when we have SSE, these could be more efficient, by using movd/movq.
330 if (!X86ScalarSSEf64) {
331 setOperationAction(ISD::BITCAST , MVT::f32 , Expand);
332 setOperationAction(ISD::BITCAST , MVT::i32 , Expand);
333 if (Subtarget->is64Bit()) {
334 setOperationAction(ISD::BITCAST , MVT::f64 , Expand);
335 // Without SSE, i64->f64 goes through memory.
336 setOperationAction(ISD::BITCAST , MVT::i64 , Expand);
340 // Scalar integer divide and remainder are lowered to use operations that
341 // produce two results, to match the available instructions. This exposes
342 // the two-result form to trivial CSE, which is able to combine x/y and x%y
343 // into a single instruction.
345 // Scalar integer multiply-high is also lowered to use two-result
346 // operations, to match the available instructions. However, plain multiply
347 // (low) operations are left as Legal, as there are single-result
348 // instructions for this in x86. Using the two-result multiply instructions
349 // when both high and low results are needed must be arranged by dagcombine.
350 for (unsigned i = 0, e = 4; i != e; ++i) {
352 setOperationAction(ISD::MULHS, VT, Expand);
353 setOperationAction(ISD::MULHU, VT, Expand);
354 setOperationAction(ISD::SDIV, VT, Expand);
355 setOperationAction(ISD::UDIV, VT, Expand);
356 setOperationAction(ISD::SREM, VT, Expand);
357 setOperationAction(ISD::UREM, VT, Expand);
359 // Add/Sub overflow ops with MVT::Glues are lowered to EFLAGS dependences.
360 setOperationAction(ISD::ADDC, VT, Custom);
361 setOperationAction(ISD::ADDE, VT, Custom);
362 setOperationAction(ISD::SUBC, VT, Custom);
363 setOperationAction(ISD::SUBE, VT, Custom);
366 setOperationAction(ISD::BR_JT , MVT::Other, Expand);
367 setOperationAction(ISD::BRCOND , MVT::Other, Custom);
368 setOperationAction(ISD::BR_CC , MVT::Other, Expand);
369 setOperationAction(ISD::SELECT_CC , MVT::Other, Expand);
370 if (Subtarget->is64Bit())
371 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i32, Legal);
372 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16 , Legal);
373 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8 , Legal);
374 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1 , Expand);
375 setOperationAction(ISD::FP_ROUND_INREG , MVT::f32 , Expand);
376 setOperationAction(ISD::FREM , MVT::f32 , Expand);
377 setOperationAction(ISD::FREM , MVT::f64 , Expand);
378 setOperationAction(ISD::FREM , MVT::f80 , Expand);
379 setOperationAction(ISD::FLT_ROUNDS_ , MVT::i32 , Custom);
381 // Promote the i8 variants and force them on up to i32 which has a shorter
383 setOperationAction(ISD::CTTZ , MVT::i8 , Promote);
384 AddPromotedToType (ISD::CTTZ , MVT::i8 , MVT::i32);
385 setOperationAction(ISD::CTTZ_ZERO_UNDEF , MVT::i8 , Promote);
386 AddPromotedToType (ISD::CTTZ_ZERO_UNDEF , MVT::i8 , MVT::i32);
387 if (Subtarget->hasBMI()) {
388 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i16 , Expand);
389 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i32 , Expand);
390 if (Subtarget->is64Bit())
391 setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i64, Expand);
393 setOperationAction(ISD::CTTZ , MVT::i16 , Custom);
394 setOperationAction(ISD::CTTZ , MVT::i32 , Custom);
395 if (Subtarget->is64Bit())
396 setOperationAction(ISD::CTTZ , MVT::i64 , Custom);
399 if (Subtarget->hasLZCNT()) {
400 // When promoting the i8 variants, force them to i32 for a shorter
402 setOperationAction(ISD::CTLZ , MVT::i8 , Promote);
403 AddPromotedToType (ISD::CTLZ , MVT::i8 , MVT::i32);
404 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i8 , Promote);
405 AddPromotedToType (ISD::CTLZ_ZERO_UNDEF, MVT::i8 , MVT::i32);
406 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i16 , Expand);
407 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i32 , Expand);
408 if (Subtarget->is64Bit())
409 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i64, Expand);
411 setOperationAction(ISD::CTLZ , MVT::i8 , Custom);
412 setOperationAction(ISD::CTLZ , MVT::i16 , Custom);
413 setOperationAction(ISD::CTLZ , MVT::i32 , Custom);
414 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i8 , Custom);
415 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i16 , Custom);
416 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i32 , Custom);
417 if (Subtarget->is64Bit()) {
418 setOperationAction(ISD::CTLZ , MVT::i64 , Custom);
419 setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i64, Custom);
423 if (Subtarget->hasPOPCNT()) {
424 setOperationAction(ISD::CTPOP , MVT::i8 , Promote);
426 setOperationAction(ISD::CTPOP , MVT::i8 , Expand);
427 setOperationAction(ISD::CTPOP , MVT::i16 , Expand);
428 setOperationAction(ISD::CTPOP , MVT::i32 , Expand);
429 if (Subtarget->is64Bit())
430 setOperationAction(ISD::CTPOP , MVT::i64 , Expand);
433 setOperationAction(ISD::READCYCLECOUNTER , MVT::i64 , Custom);
434 setOperationAction(ISD::BSWAP , MVT::i16 , Expand);
436 // These should be promoted to a larger select which is supported.
437 setOperationAction(ISD::SELECT , MVT::i1 , Promote);
438 // X86 wants to expand cmov itself.
439 setOperationAction(ISD::SELECT , MVT::i8 , Custom);
440 setOperationAction(ISD::SELECT , MVT::i16 , Custom);
441 setOperationAction(ISD::SELECT , MVT::i32 , Custom);
442 setOperationAction(ISD::SELECT , MVT::f32 , Custom);
443 setOperationAction(ISD::SELECT , MVT::f64 , Custom);
444 setOperationAction(ISD::SELECT , MVT::f80 , Custom);
445 setOperationAction(ISD::SETCC , MVT::i8 , Custom);
446 setOperationAction(ISD::SETCC , MVT::i16 , Custom);
447 setOperationAction(ISD::SETCC , MVT::i32 , Custom);
448 setOperationAction(ISD::SETCC , MVT::f32 , Custom);
449 setOperationAction(ISD::SETCC , MVT::f64 , Custom);
450 setOperationAction(ISD::SETCC , MVT::f80 , Custom);
451 if (Subtarget->is64Bit()) {
452 setOperationAction(ISD::SELECT , MVT::i64 , Custom);
453 setOperationAction(ISD::SETCC , MVT::i64 , Custom);
455 setOperationAction(ISD::EH_RETURN , MVT::Other, Custom);
458 setOperationAction(ISD::ConstantPool , MVT::i32 , Custom);
459 setOperationAction(ISD::JumpTable , MVT::i32 , Custom);
460 setOperationAction(ISD::GlobalAddress , MVT::i32 , Custom);
461 setOperationAction(ISD::GlobalTLSAddress, MVT::i32 , Custom);
462 if (Subtarget->is64Bit())
463 setOperationAction(ISD::GlobalTLSAddress, MVT::i64, Custom);
464 setOperationAction(ISD::ExternalSymbol , MVT::i32 , Custom);
465 setOperationAction(ISD::BlockAddress , MVT::i32 , Custom);
466 if (Subtarget->is64Bit()) {
467 setOperationAction(ISD::ConstantPool , MVT::i64 , Custom);
468 setOperationAction(ISD::JumpTable , MVT::i64 , Custom);
469 setOperationAction(ISD::GlobalAddress , MVT::i64 , Custom);
470 setOperationAction(ISD::ExternalSymbol, MVT::i64 , Custom);
471 setOperationAction(ISD::BlockAddress , MVT::i64 , Custom);
473 // 64-bit addm sub, shl, sra, srl (iff 32-bit x86)
474 setOperationAction(ISD::SHL_PARTS , MVT::i32 , Custom);
475 setOperationAction(ISD::SRA_PARTS , MVT::i32 , Custom);
476 setOperationAction(ISD::SRL_PARTS , MVT::i32 , Custom);
477 if (Subtarget->is64Bit()) {
478 setOperationAction(ISD::SHL_PARTS , MVT::i64 , Custom);
479 setOperationAction(ISD::SRA_PARTS , MVT::i64 , Custom);
480 setOperationAction(ISD::SRL_PARTS , MVT::i64 , Custom);
483 if (Subtarget->hasSSE1())
484 setOperationAction(ISD::PREFETCH , MVT::Other, Legal);
486 setOperationAction(ISD::MEMBARRIER , MVT::Other, Custom);
487 setOperationAction(ISD::ATOMIC_FENCE , MVT::Other, Custom);
489 // On X86 and X86-64, atomic operations are lowered to locked instructions.
490 // Locked instructions, in turn, have implicit fence semantics (all memory
491 // operations are flushed before issuing the locked instruction, and they
492 // are not buffered), so we can fold away the common pattern of
493 // fence-atomic-fence.
494 setShouldFoldAtomicFences(true);
496 // Expand certain atomics
497 for (unsigned i = 0, e = 4; i != e; ++i) {
499 setOperationAction(ISD::ATOMIC_CMP_SWAP, VT, Custom);
500 setOperationAction(ISD::ATOMIC_LOAD_SUB, VT, Custom);
501 setOperationAction(ISD::ATOMIC_STORE, VT, Custom);
504 if (!Subtarget->is64Bit()) {
505 setOperationAction(ISD::ATOMIC_LOAD, MVT::i64, Custom);
506 setOperationAction(ISD::ATOMIC_LOAD_ADD, MVT::i64, Custom);
507 setOperationAction(ISD::ATOMIC_LOAD_SUB, MVT::i64, Custom);
508 setOperationAction(ISD::ATOMIC_LOAD_AND, MVT::i64, Custom);
509 setOperationAction(ISD::ATOMIC_LOAD_OR, MVT::i64, Custom);
510 setOperationAction(ISD::ATOMIC_LOAD_XOR, MVT::i64, Custom);
511 setOperationAction(ISD::ATOMIC_LOAD_NAND, MVT::i64, Custom);
512 setOperationAction(ISD::ATOMIC_SWAP, MVT::i64, Custom);
515 if (Subtarget->hasCmpxchg16b()) {
516 setOperationAction(ISD::ATOMIC_CMP_SWAP, MVT::i128, Custom);
519 // FIXME - use subtarget debug flags
520 if (!Subtarget->isTargetDarwin() &&
521 !Subtarget->isTargetELF() &&
522 !Subtarget->isTargetCygMing()) {
523 setOperationAction(ISD::EH_LABEL, MVT::Other, Expand);
526 setOperationAction(ISD::EXCEPTIONADDR, MVT::i64, Expand);
527 setOperationAction(ISD::EHSELECTION, MVT::i64, Expand);
528 setOperationAction(ISD::EXCEPTIONADDR, MVT::i32, Expand);
529 setOperationAction(ISD::EHSELECTION, MVT::i32, Expand);
530 if (Subtarget->is64Bit()) {
531 setExceptionPointerRegister(X86::RAX);
532 setExceptionSelectorRegister(X86::RDX);
534 setExceptionPointerRegister(X86::EAX);
535 setExceptionSelectorRegister(X86::EDX);
537 setOperationAction(ISD::FRAME_TO_ARGS_OFFSET, MVT::i32, Custom);
538 setOperationAction(ISD::FRAME_TO_ARGS_OFFSET, MVT::i64, Custom);
540 setOperationAction(ISD::INIT_TRAMPOLINE, MVT::Other, Custom);
541 setOperationAction(ISD::ADJUST_TRAMPOLINE, MVT::Other, Custom);
543 setOperationAction(ISD::TRAP, MVT::Other, Legal);
545 // VASTART needs to be custom lowered to use the VarArgsFrameIndex
546 setOperationAction(ISD::VASTART , MVT::Other, Custom);
547 setOperationAction(ISD::VAEND , MVT::Other, Expand);
548 if (Subtarget->is64Bit()) {
549 setOperationAction(ISD::VAARG , MVT::Other, Custom);
550 setOperationAction(ISD::VACOPY , MVT::Other, Custom);
552 setOperationAction(ISD::VAARG , MVT::Other, Expand);
553 setOperationAction(ISD::VACOPY , MVT::Other, Expand);
556 setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
557 setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
559 if (Subtarget->isTargetCOFF() && !Subtarget->isTargetEnvMacho())
560 setOperationAction(ISD::DYNAMIC_STACKALLOC, Subtarget->is64Bit() ?
561 MVT::i64 : MVT::i32, Custom);
562 else if (TM.Options.EnableSegmentedStacks)
563 setOperationAction(ISD::DYNAMIC_STACKALLOC, Subtarget->is64Bit() ?
564 MVT::i64 : MVT::i32, Custom);
566 setOperationAction(ISD::DYNAMIC_STACKALLOC, Subtarget->is64Bit() ?
567 MVT::i64 : MVT::i32, Expand);
569 if (!TM.Options.UseSoftFloat && X86ScalarSSEf64) {
570 // f32 and f64 use SSE.
571 // Set up the FP register classes.
572 addRegisterClass(MVT::f32, X86::FR32RegisterClass);
573 addRegisterClass(MVT::f64, X86::FR64RegisterClass);
575 // Use ANDPD to simulate FABS.
576 setOperationAction(ISD::FABS , MVT::f64, Custom);
577 setOperationAction(ISD::FABS , MVT::f32, Custom);
579 // Use XORP to simulate FNEG.
580 setOperationAction(ISD::FNEG , MVT::f64, Custom);
581 setOperationAction(ISD::FNEG , MVT::f32, Custom);
583 // Use ANDPD and ORPD to simulate FCOPYSIGN.
584 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Custom);
585 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
587 // Lower this to FGETSIGNx86 plus an AND.
588 setOperationAction(ISD::FGETSIGN, MVT::i64, Custom);
589 setOperationAction(ISD::FGETSIGN, MVT::i32, Custom);
591 // We don't support sin/cos/fmod
592 setOperationAction(ISD::FSIN , MVT::f64, Expand);
593 setOperationAction(ISD::FCOS , MVT::f64, Expand);
594 setOperationAction(ISD::FSIN , MVT::f32, Expand);
595 setOperationAction(ISD::FCOS , MVT::f32, Expand);
597 // Expand FP immediates into loads from the stack, except for the special
599 addLegalFPImmediate(APFloat(+0.0)); // xorpd
600 addLegalFPImmediate(APFloat(+0.0f)); // xorps
601 } else if (!TM.Options.UseSoftFloat && X86ScalarSSEf32) {
602 // Use SSE for f32, x87 for f64.
603 // Set up the FP register classes.
604 addRegisterClass(MVT::f32, X86::FR32RegisterClass);
605 addRegisterClass(MVT::f64, X86::RFP64RegisterClass);
607 // Use ANDPS to simulate FABS.
608 setOperationAction(ISD::FABS , MVT::f32, Custom);
610 // Use XORP to simulate FNEG.
611 setOperationAction(ISD::FNEG , MVT::f32, Custom);
613 setOperationAction(ISD::UNDEF, MVT::f64, Expand);
615 // Use ANDPS and ORPS to simulate FCOPYSIGN.
616 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
617 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
619 // We don't support sin/cos/fmod
620 setOperationAction(ISD::FSIN , MVT::f32, Expand);
621 setOperationAction(ISD::FCOS , MVT::f32, Expand);
623 // Special cases we handle for FP constants.
624 addLegalFPImmediate(APFloat(+0.0f)); // xorps
625 addLegalFPImmediate(APFloat(+0.0)); // FLD0
626 addLegalFPImmediate(APFloat(+1.0)); // FLD1
627 addLegalFPImmediate(APFloat(-0.0)); // FLD0/FCHS
628 addLegalFPImmediate(APFloat(-1.0)); // FLD1/FCHS
630 if (!TM.Options.UnsafeFPMath) {
631 setOperationAction(ISD::FSIN , MVT::f64 , Expand);
632 setOperationAction(ISD::FCOS , MVT::f64 , Expand);
634 } else if (!TM.Options.UseSoftFloat) {
635 // f32 and f64 in x87.
636 // Set up the FP register classes.
637 addRegisterClass(MVT::f64, X86::RFP64RegisterClass);
638 addRegisterClass(MVT::f32, X86::RFP32RegisterClass);
640 setOperationAction(ISD::UNDEF, MVT::f64, Expand);
641 setOperationAction(ISD::UNDEF, MVT::f32, Expand);
642 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
643 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand);
645 if (!TM.Options.UnsafeFPMath) {
646 setOperationAction(ISD::FSIN , MVT::f64 , Expand);
647 setOperationAction(ISD::FCOS , MVT::f64 , Expand);
649 addLegalFPImmediate(APFloat(+0.0)); // FLD0
650 addLegalFPImmediate(APFloat(+1.0)); // FLD1
651 addLegalFPImmediate(APFloat(-0.0)); // FLD0/FCHS
652 addLegalFPImmediate(APFloat(-1.0)); // FLD1/FCHS
653 addLegalFPImmediate(APFloat(+0.0f)); // FLD0
654 addLegalFPImmediate(APFloat(+1.0f)); // FLD1
655 addLegalFPImmediate(APFloat(-0.0f)); // FLD0/FCHS
656 addLegalFPImmediate(APFloat(-1.0f)); // FLD1/FCHS
659 // We don't support FMA.
660 setOperationAction(ISD::FMA, MVT::f64, Expand);
661 setOperationAction(ISD::FMA, MVT::f32, Expand);
663 // Long double always uses X87.
664 if (!TM.Options.UseSoftFloat) {
665 addRegisterClass(MVT::f80, X86::RFP80RegisterClass);
666 setOperationAction(ISD::UNDEF, MVT::f80, Expand);
667 setOperationAction(ISD::FCOPYSIGN, MVT::f80, Expand);
669 APFloat TmpFlt = APFloat::getZero(APFloat::x87DoubleExtended);
670 addLegalFPImmediate(TmpFlt); // FLD0
672 addLegalFPImmediate(TmpFlt); // FLD0/FCHS
675 APFloat TmpFlt2(+1.0);
676 TmpFlt2.convert(APFloat::x87DoubleExtended, APFloat::rmNearestTiesToEven,
678 addLegalFPImmediate(TmpFlt2); // FLD1
679 TmpFlt2.changeSign();
680 addLegalFPImmediate(TmpFlt2); // FLD1/FCHS
683 if (!TM.Options.UnsafeFPMath) {
684 setOperationAction(ISD::FSIN , MVT::f80 , Expand);
685 setOperationAction(ISD::FCOS , MVT::f80 , Expand);
688 setOperationAction(ISD::FFLOOR, MVT::f80, Expand);
689 setOperationAction(ISD::FCEIL, MVT::f80, Expand);
690 setOperationAction(ISD::FTRUNC, MVT::f80, Expand);
691 setOperationAction(ISD::FRINT, MVT::f80, Expand);
692 setOperationAction(ISD::FNEARBYINT, MVT::f80, Expand);
693 setOperationAction(ISD::FMA, MVT::f80, Expand);
696 // Always use a library call for pow.
697 setOperationAction(ISD::FPOW , MVT::f32 , Expand);
698 setOperationAction(ISD::FPOW , MVT::f64 , Expand);
699 setOperationAction(ISD::FPOW , MVT::f80 , Expand);
701 setOperationAction(ISD::FLOG, MVT::f80, Expand);
702 setOperationAction(ISD::FLOG2, MVT::f80, Expand);
703 setOperationAction(ISD::FLOG10, MVT::f80, Expand);
704 setOperationAction(ISD::FEXP, MVT::f80, Expand);
705 setOperationAction(ISD::FEXP2, MVT::f80, Expand);
707 // First set operation action for all vector types to either promote
708 // (for widening) or expand (for scalarization). Then we will selectively
709 // turn on ones that can be effectively codegen'd.
710 for (unsigned VT = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
711 VT <= (unsigned)MVT::LAST_VECTOR_VALUETYPE; ++VT) {
712 setOperationAction(ISD::ADD , (MVT::SimpleValueType)VT, Expand);
713 setOperationAction(ISD::SUB , (MVT::SimpleValueType)VT, Expand);
714 setOperationAction(ISD::FADD, (MVT::SimpleValueType)VT, Expand);
715 setOperationAction(ISD::FNEG, (MVT::SimpleValueType)VT, Expand);
716 setOperationAction(ISD::FSUB, (MVT::SimpleValueType)VT, Expand);
717 setOperationAction(ISD::MUL , (MVT::SimpleValueType)VT, Expand);
718 setOperationAction(ISD::FMUL, (MVT::SimpleValueType)VT, Expand);
719 setOperationAction(ISD::SDIV, (MVT::SimpleValueType)VT, Expand);
720 setOperationAction(ISD::UDIV, (MVT::SimpleValueType)VT, Expand);
721 setOperationAction(ISD::FDIV, (MVT::SimpleValueType)VT, Expand);
722 setOperationAction(ISD::SREM, (MVT::SimpleValueType)VT, Expand);
723 setOperationAction(ISD::UREM, (MVT::SimpleValueType)VT, Expand);
724 setOperationAction(ISD::LOAD, (MVT::SimpleValueType)VT, Expand);
725 setOperationAction(ISD::VECTOR_SHUFFLE, (MVT::SimpleValueType)VT, Expand);
726 setOperationAction(ISD::EXTRACT_VECTOR_ELT,(MVT::SimpleValueType)VT,Expand);
727 setOperationAction(ISD::INSERT_VECTOR_ELT,(MVT::SimpleValueType)VT, Expand);
728 setOperationAction(ISD::EXTRACT_SUBVECTOR,(MVT::SimpleValueType)VT,Expand);
729 setOperationAction(ISD::INSERT_SUBVECTOR,(MVT::SimpleValueType)VT,Expand);
730 setOperationAction(ISD::FABS, (MVT::SimpleValueType)VT, Expand);
731 setOperationAction(ISD::FSIN, (MVT::SimpleValueType)VT, Expand);
732 setOperationAction(ISD::FCOS, (MVT::SimpleValueType)VT, Expand);
733 setOperationAction(ISD::FREM, (MVT::SimpleValueType)VT, Expand);
734 setOperationAction(ISD::FPOWI, (MVT::SimpleValueType)VT, Expand);
735 setOperationAction(ISD::FSQRT, (MVT::SimpleValueType)VT, Expand);
736 setOperationAction(ISD::FCOPYSIGN, (MVT::SimpleValueType)VT, Expand);
737 setOperationAction(ISD::SMUL_LOHI, (MVT::SimpleValueType)VT, Expand);
738 setOperationAction(ISD::UMUL_LOHI, (MVT::SimpleValueType)VT, Expand);
739 setOperationAction(ISD::SDIVREM, (MVT::SimpleValueType)VT, Expand);
740 setOperationAction(ISD::UDIVREM, (MVT::SimpleValueType)VT, Expand);
741 setOperationAction(ISD::FPOW, (MVT::SimpleValueType)VT, Expand);
742 setOperationAction(ISD::CTPOP, (MVT::SimpleValueType)VT, Expand);
743 setOperationAction(ISD::CTTZ, (MVT::SimpleValueType)VT, Expand);
744 setOperationAction(ISD::CTTZ_ZERO_UNDEF, (MVT::SimpleValueType)VT, Expand);
745 setOperationAction(ISD::CTLZ, (MVT::SimpleValueType)VT, Expand);
746 setOperationAction(ISD::CTLZ_ZERO_UNDEF, (MVT::SimpleValueType)VT, Expand);
747 setOperationAction(ISD::SHL, (MVT::SimpleValueType)VT, Expand);
748 setOperationAction(ISD::SRA, (MVT::SimpleValueType)VT, Expand);
749 setOperationAction(ISD::SRL, (MVT::SimpleValueType)VT, Expand);
750 setOperationAction(ISD::ROTL, (MVT::SimpleValueType)VT, Expand);
751 setOperationAction(ISD::ROTR, (MVT::SimpleValueType)VT, Expand);
752 setOperationAction(ISD::BSWAP, (MVT::SimpleValueType)VT, Expand);
753 setOperationAction(ISD::SETCC, (MVT::SimpleValueType)VT, Expand);
754 setOperationAction(ISD::FLOG, (MVT::SimpleValueType)VT, Expand);
755 setOperationAction(ISD::FLOG2, (MVT::SimpleValueType)VT, Expand);
756 setOperationAction(ISD::FLOG10, (MVT::SimpleValueType)VT, Expand);
757 setOperationAction(ISD::FEXP, (MVT::SimpleValueType)VT, Expand);
758 setOperationAction(ISD::FEXP2, (MVT::SimpleValueType)VT, Expand);
759 setOperationAction(ISD::FP_TO_UINT, (MVT::SimpleValueType)VT, Expand);
760 setOperationAction(ISD::FP_TO_SINT, (MVT::SimpleValueType)VT, Expand);
761 setOperationAction(ISD::UINT_TO_FP, (MVT::SimpleValueType)VT, Expand);
762 setOperationAction(ISD::SINT_TO_FP, (MVT::SimpleValueType)VT, Expand);
763 setOperationAction(ISD::SIGN_EXTEND_INREG, (MVT::SimpleValueType)VT,Expand);
764 setOperationAction(ISD::TRUNCATE, (MVT::SimpleValueType)VT, Expand);
765 setOperationAction(ISD::SIGN_EXTEND, (MVT::SimpleValueType)VT, Expand);
766 setOperationAction(ISD::ZERO_EXTEND, (MVT::SimpleValueType)VT, Expand);
767 setOperationAction(ISD::ANY_EXTEND, (MVT::SimpleValueType)VT, Expand);
768 setOperationAction(ISD::VSELECT, (MVT::SimpleValueType)VT, Expand);
769 for (unsigned InnerVT = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
770 InnerVT <= (unsigned)MVT::LAST_VECTOR_VALUETYPE; ++InnerVT)
771 setTruncStoreAction((MVT::SimpleValueType)VT,
772 (MVT::SimpleValueType)InnerVT, Expand);
773 setLoadExtAction(ISD::SEXTLOAD, (MVT::SimpleValueType)VT, Expand);
774 setLoadExtAction(ISD::ZEXTLOAD, (MVT::SimpleValueType)VT, Expand);
775 setLoadExtAction(ISD::EXTLOAD, (MVT::SimpleValueType)VT, Expand);
778 // FIXME: In order to prevent SSE instructions being expanded to MMX ones
779 // with -msoft-float, disable use of MMX as well.
780 if (!TM.Options.UseSoftFloat && Subtarget->hasMMX()) {
781 addRegisterClass(MVT::x86mmx, X86::VR64RegisterClass);
782 // No operations on x86mmx supported, everything uses intrinsics.
785 // MMX-sized vectors (other than x86mmx) are expected to be expanded
786 // into smaller operations.
787 setOperationAction(ISD::MULHS, MVT::v8i8, Expand);
788 setOperationAction(ISD::MULHS, MVT::v4i16, Expand);
789 setOperationAction(ISD::MULHS, MVT::v2i32, Expand);
790 setOperationAction(ISD::MULHS, MVT::v1i64, Expand);
791 setOperationAction(ISD::AND, MVT::v8i8, Expand);
792 setOperationAction(ISD::AND, MVT::v4i16, Expand);
793 setOperationAction(ISD::AND, MVT::v2i32, Expand);
794 setOperationAction(ISD::AND, MVT::v1i64, Expand);
795 setOperationAction(ISD::OR, MVT::v8i8, Expand);
796 setOperationAction(ISD::OR, MVT::v4i16, Expand);
797 setOperationAction(ISD::OR, MVT::v2i32, Expand);
798 setOperationAction(ISD::OR, MVT::v1i64, Expand);
799 setOperationAction(ISD::XOR, MVT::v8i8, Expand);
800 setOperationAction(ISD::XOR, MVT::v4i16, Expand);
801 setOperationAction(ISD::XOR, MVT::v2i32, Expand);
802 setOperationAction(ISD::XOR, MVT::v1i64, Expand);
803 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v8i8, Expand);
804 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v4i16, Expand);
805 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v2i32, Expand);
806 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v1i64, Expand);
807 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v1i64, Expand);
808 setOperationAction(ISD::SELECT, MVT::v8i8, Expand);
809 setOperationAction(ISD::SELECT, MVT::v4i16, Expand);
810 setOperationAction(ISD::SELECT, MVT::v2i32, Expand);
811 setOperationAction(ISD::SELECT, MVT::v1i64, Expand);
812 setOperationAction(ISD::BITCAST, MVT::v8i8, Expand);
813 setOperationAction(ISD::BITCAST, MVT::v4i16, Expand);
814 setOperationAction(ISD::BITCAST, MVT::v2i32, Expand);
815 setOperationAction(ISD::BITCAST, MVT::v1i64, Expand);
817 if (!TM.Options.UseSoftFloat && Subtarget->hasSSE1()) {
818 addRegisterClass(MVT::v4f32, X86::VR128RegisterClass);
820 setOperationAction(ISD::FADD, MVT::v4f32, Legal);
821 setOperationAction(ISD::FSUB, MVT::v4f32, Legal);
822 setOperationAction(ISD::FMUL, MVT::v4f32, Legal);
823 setOperationAction(ISD::FDIV, MVT::v4f32, Legal);
824 setOperationAction(ISD::FSQRT, MVT::v4f32, Legal);
825 setOperationAction(ISD::FNEG, MVT::v4f32, Custom);
826 setOperationAction(ISD::LOAD, MVT::v4f32, Legal);
827 setOperationAction(ISD::BUILD_VECTOR, MVT::v4f32, Custom);
828 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v4f32, Custom);
829 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4f32, Custom);
830 setOperationAction(ISD::SELECT, MVT::v4f32, Custom);
831 setOperationAction(ISD::SETCC, MVT::v4f32, Custom);
834 if (!TM.Options.UseSoftFloat && Subtarget->hasSSE2()) {
835 addRegisterClass(MVT::v2f64, X86::VR128RegisterClass);
837 // FIXME: Unfortunately -soft-float and -no-implicit-float means XMM
838 // registers cannot be used even for integer operations.
839 addRegisterClass(MVT::v16i8, X86::VR128RegisterClass);
840 addRegisterClass(MVT::v8i16, X86::VR128RegisterClass);
841 addRegisterClass(MVT::v4i32, X86::VR128RegisterClass);
842 addRegisterClass(MVT::v2i64, X86::VR128RegisterClass);
844 setOperationAction(ISD::ADD, MVT::v16i8, Legal);
845 setOperationAction(ISD::ADD, MVT::v8i16, Legal);
846 setOperationAction(ISD::ADD, MVT::v4i32, Legal);
847 setOperationAction(ISD::ADD, MVT::v2i64, Legal);
848 setOperationAction(ISD::MUL, MVT::v2i64, Custom);
849 setOperationAction(ISD::SUB, MVT::v16i8, Legal);
850 setOperationAction(ISD::SUB, MVT::v8i16, Legal);
851 setOperationAction(ISD::SUB, MVT::v4i32, Legal);
852 setOperationAction(ISD::SUB, MVT::v2i64, Legal);
853 setOperationAction(ISD::MUL, MVT::v8i16, Legal);
854 setOperationAction(ISD::FADD, MVT::v2f64, Legal);
855 setOperationAction(ISD::FSUB, MVT::v2f64, Legal);
856 setOperationAction(ISD::FMUL, MVT::v2f64, Legal);
857 setOperationAction(ISD::FDIV, MVT::v2f64, Legal);
858 setOperationAction(ISD::FSQRT, MVT::v2f64, Legal);
859 setOperationAction(ISD::FNEG, MVT::v2f64, Custom);
861 setOperationAction(ISD::SETCC, MVT::v2i64, Custom);
862 setOperationAction(ISD::SETCC, MVT::v16i8, Custom);
863 setOperationAction(ISD::SETCC, MVT::v8i16, Custom);
864 setOperationAction(ISD::SETCC, MVT::v4i32, Custom);
866 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v16i8, Custom);
867 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v8i16, Custom);
868 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8i16, Custom);
869 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4i32, Custom);
870 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4f32, Custom);
872 setOperationAction(ISD::CONCAT_VECTORS, MVT::v2f64, Custom);
873 setOperationAction(ISD::CONCAT_VECTORS, MVT::v2i64, Custom);
874 setOperationAction(ISD::CONCAT_VECTORS, MVT::v16i8, Custom);
875 setOperationAction(ISD::CONCAT_VECTORS, MVT::v8i16, Custom);
876 setOperationAction(ISD::CONCAT_VECTORS, MVT::v4i32, Custom);
878 // Custom lower build_vector, vector_shuffle, and extract_vector_elt.
879 for (unsigned i = (unsigned)MVT::v16i8; i != (unsigned)MVT::v2i64; ++i) {
880 EVT VT = (MVT::SimpleValueType)i;
881 // Do not attempt to custom lower non-power-of-2 vectors
882 if (!isPowerOf2_32(VT.getVectorNumElements()))
884 // Do not attempt to custom lower non-128-bit vectors
885 if (!VT.is128BitVector())
887 setOperationAction(ISD::BUILD_VECTOR,
888 VT.getSimpleVT().SimpleTy, Custom);
889 setOperationAction(ISD::VECTOR_SHUFFLE,
890 VT.getSimpleVT().SimpleTy, Custom);
891 setOperationAction(ISD::EXTRACT_VECTOR_ELT,
892 VT.getSimpleVT().SimpleTy, Custom);
895 setOperationAction(ISD::BUILD_VECTOR, MVT::v2f64, Custom);
896 setOperationAction(ISD::BUILD_VECTOR, MVT::v2i64, Custom);
897 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2f64, Custom);
898 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2i64, Custom);
899 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2f64, Custom);
900 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2f64, Custom);
902 if (Subtarget->is64Bit()) {
903 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2i64, Custom);
904 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2i64, Custom);
907 // Promote v16i8, v8i16, v4i32 load, select, and, or, xor to v2i64.
908 for (unsigned i = (unsigned)MVT::v16i8; i != (unsigned)MVT::v2i64; i++) {
909 MVT::SimpleValueType SVT = (MVT::SimpleValueType)i;
912 // Do not attempt to promote non-128-bit vectors
913 if (!VT.is128BitVector())
916 setOperationAction(ISD::AND, SVT, Promote);
917 AddPromotedToType (ISD::AND, SVT, MVT::v2i64);
918 setOperationAction(ISD::OR, SVT, Promote);
919 AddPromotedToType (ISD::OR, SVT, MVT::v2i64);
920 setOperationAction(ISD::XOR, SVT, Promote);
921 AddPromotedToType (ISD::XOR, SVT, MVT::v2i64);
922 setOperationAction(ISD::LOAD, SVT, Promote);
923 AddPromotedToType (ISD::LOAD, SVT, MVT::v2i64);
924 setOperationAction(ISD::SELECT, SVT, Promote);
925 AddPromotedToType (ISD::SELECT, SVT, MVT::v2i64);
928 setTruncStoreAction(MVT::f64, MVT::f32, Expand);
930 // Custom lower v2i64 and v2f64 selects.
931 setOperationAction(ISD::LOAD, MVT::v2f64, Legal);
932 setOperationAction(ISD::LOAD, MVT::v2i64, Legal);
933 setOperationAction(ISD::SELECT, MVT::v2f64, Custom);
934 setOperationAction(ISD::SELECT, MVT::v2i64, Custom);
936 setOperationAction(ISD::FP_TO_SINT, MVT::v4i32, Legal);
937 setOperationAction(ISD::SINT_TO_FP, MVT::v4i32, Legal);
940 if (Subtarget->hasSSE41()) {
941 setOperationAction(ISD::FFLOOR, MVT::f32, Legal);
942 setOperationAction(ISD::FCEIL, MVT::f32, Legal);
943 setOperationAction(ISD::FTRUNC, MVT::f32, Legal);
944 setOperationAction(ISD::FRINT, MVT::f32, Legal);
945 setOperationAction(ISD::FNEARBYINT, MVT::f32, Legal);
946 setOperationAction(ISD::FFLOOR, MVT::f64, Legal);
947 setOperationAction(ISD::FCEIL, MVT::f64, Legal);
948 setOperationAction(ISD::FTRUNC, MVT::f64, Legal);
949 setOperationAction(ISD::FRINT, MVT::f64, Legal);
950 setOperationAction(ISD::FNEARBYINT, MVT::f64, Legal);
952 // FIXME: Do we need to handle scalar-to-vector here?
953 setOperationAction(ISD::MUL, MVT::v4i32, Legal);
955 setOperationAction(ISD::VSELECT, MVT::v2f64, Legal);
956 setOperationAction(ISD::VSELECT, MVT::v2i64, Legal);
957 setOperationAction(ISD::VSELECT, MVT::v16i8, Legal);
958 setOperationAction(ISD::VSELECT, MVT::v4i32, Legal);
959 setOperationAction(ISD::VSELECT, MVT::v4f32, Legal);
961 // i8 and i16 vectors are custom , because the source register and source
962 // source memory operand types are not the same width. f32 vectors are
963 // custom since the immediate controlling the insert encodes additional
965 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v16i8, Custom);
966 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8i16, Custom);
967 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4i32, Custom);
968 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4f32, Custom);
970 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v16i8, Custom);
971 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v8i16, Custom);
972 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4i32, Custom);
973 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4f32, Custom);
975 // FIXME: these should be Legal but thats only for the case where
976 // the index is constant. For now custom expand to deal with that.
977 if (Subtarget->is64Bit()) {
978 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2i64, Custom);
979 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2i64, Custom);
983 if (Subtarget->hasSSE2()) {
984 setOperationAction(ISD::SRL, MVT::v8i16, Custom);
985 setOperationAction(ISD::SRL, MVT::v16i8, Custom);
987 setOperationAction(ISD::SHL, MVT::v8i16, Custom);
988 setOperationAction(ISD::SHL, MVT::v16i8, Custom);
990 setOperationAction(ISD::SRA, MVT::v8i16, Custom);
991 setOperationAction(ISD::SRA, MVT::v16i8, Custom);
993 if (Subtarget->hasAVX2()) {
994 setOperationAction(ISD::SRL, MVT::v2i64, Legal);
995 setOperationAction(ISD::SRL, MVT::v4i32, Legal);
997 setOperationAction(ISD::SHL, MVT::v2i64, Legal);
998 setOperationAction(ISD::SHL, MVT::v4i32, Legal);
1000 setOperationAction(ISD::SRA, MVT::v4i32, Legal);
1002 setOperationAction(ISD::SRL, MVT::v2i64, Custom);
1003 setOperationAction(ISD::SRL, MVT::v4i32, Custom);
1005 setOperationAction(ISD::SHL, MVT::v2i64, Custom);
1006 setOperationAction(ISD::SHL, MVT::v4i32, Custom);
1008 setOperationAction(ISD::SRA, MVT::v4i32, Custom);
1012 if (Subtarget->hasSSE42())
1013 setOperationAction(ISD::SETCC, MVT::v2i64, Custom);
1015 if (!TM.Options.UseSoftFloat && Subtarget->hasAVX()) {
1016 addRegisterClass(MVT::v32i8, X86::VR256RegisterClass);
1017 addRegisterClass(MVT::v16i16, X86::VR256RegisterClass);
1018 addRegisterClass(MVT::v8i32, X86::VR256RegisterClass);
1019 addRegisterClass(MVT::v8f32, X86::VR256RegisterClass);
1020 addRegisterClass(MVT::v4i64, X86::VR256RegisterClass);
1021 addRegisterClass(MVT::v4f64, X86::VR256RegisterClass);
1023 setOperationAction(ISD::LOAD, MVT::v8f32, Legal);
1024 setOperationAction(ISD::LOAD, MVT::v4f64, Legal);
1025 setOperationAction(ISD::LOAD, MVT::v4i64, Legal);
1027 setOperationAction(ISD::FADD, MVT::v8f32, Legal);
1028 setOperationAction(ISD::FSUB, MVT::v8f32, Legal);
1029 setOperationAction(ISD::FMUL, MVT::v8f32, Legal);
1030 setOperationAction(ISD::FDIV, MVT::v8f32, Legal);
1031 setOperationAction(ISD::FSQRT, MVT::v8f32, Legal);
1032 setOperationAction(ISD::FNEG, MVT::v8f32, Custom);
1034 setOperationAction(ISD::FADD, MVT::v4f64, Legal);
1035 setOperationAction(ISD::FSUB, MVT::v4f64, Legal);
1036 setOperationAction(ISD::FMUL, MVT::v4f64, Legal);
1037 setOperationAction(ISD::FDIV, MVT::v4f64, Legal);
1038 setOperationAction(ISD::FSQRT, MVT::v4f64, Legal);
1039 setOperationAction(ISD::FNEG, MVT::v4f64, Custom);
1041 setOperationAction(ISD::FP_TO_SINT, MVT::v8i32, Legal);
1042 setOperationAction(ISD::SINT_TO_FP, MVT::v8i32, Legal);
1043 setOperationAction(ISD::FP_ROUND, MVT::v4f32, Legal);
1045 setOperationAction(ISD::CONCAT_VECTORS, MVT::v4f64, Custom);
1046 setOperationAction(ISD::CONCAT_VECTORS, MVT::v4i64, Custom);
1047 setOperationAction(ISD::CONCAT_VECTORS, MVT::v8f32, Custom);
1048 setOperationAction(ISD::CONCAT_VECTORS, MVT::v8i32, Custom);
1049 setOperationAction(ISD::CONCAT_VECTORS, MVT::v32i8, Custom);
1050 setOperationAction(ISD::CONCAT_VECTORS, MVT::v16i16, Custom);
1052 setOperationAction(ISD::SRL, MVT::v16i16, Custom);
1053 setOperationAction(ISD::SRL, MVT::v32i8, Custom);
1055 setOperationAction(ISD::SHL, MVT::v16i16, Custom);
1056 setOperationAction(ISD::SHL, MVT::v32i8, Custom);
1058 setOperationAction(ISD::SRA, MVT::v16i16, Custom);
1059 setOperationAction(ISD::SRA, MVT::v32i8, Custom);
1061 setOperationAction(ISD::SETCC, MVT::v32i8, Custom);
1062 setOperationAction(ISD::SETCC, MVT::v16i16, Custom);
1063 setOperationAction(ISD::SETCC, MVT::v8i32, Custom);
1064 setOperationAction(ISD::SETCC, MVT::v4i64, Custom);
1066 setOperationAction(ISD::SELECT, MVT::v4f64, Custom);
1067 setOperationAction(ISD::SELECT, MVT::v4i64, Custom);
1068 setOperationAction(ISD::SELECT, MVT::v8f32, Custom);
1070 setOperationAction(ISD::VSELECT, MVT::v4f64, Legal);
1071 setOperationAction(ISD::VSELECT, MVT::v4i64, Legal);
1072 setOperationAction(ISD::VSELECT, MVT::v8i32, Legal);
1073 setOperationAction(ISD::VSELECT, MVT::v8f32, Legal);
1075 if (Subtarget->hasAVX2()) {
1076 setOperationAction(ISD::ADD, MVT::v4i64, Legal);
1077 setOperationAction(ISD::ADD, MVT::v8i32, Legal);
1078 setOperationAction(ISD::ADD, MVT::v16i16, Legal);
1079 setOperationAction(ISD::ADD, MVT::v32i8, Legal);
1081 setOperationAction(ISD::SUB, MVT::v4i64, Legal);
1082 setOperationAction(ISD::SUB, MVT::v8i32, Legal);
1083 setOperationAction(ISD::SUB, MVT::v16i16, Legal);
1084 setOperationAction(ISD::SUB, MVT::v32i8, Legal);
1086 setOperationAction(ISD::MUL, MVT::v4i64, Custom);
1087 setOperationAction(ISD::MUL, MVT::v8i32, Legal);
1088 setOperationAction(ISD::MUL, MVT::v16i16, Legal);
1089 // Don't lower v32i8 because there is no 128-bit byte mul
1091 setOperationAction(ISD::VSELECT, MVT::v32i8, Legal);
1093 setOperationAction(ISD::SRL, MVT::v4i64, Legal);
1094 setOperationAction(ISD::SRL, MVT::v8i32, Legal);
1096 setOperationAction(ISD::SHL, MVT::v4i64, Legal);
1097 setOperationAction(ISD::SHL, MVT::v8i32, Legal);
1099 setOperationAction(ISD::SRA, MVT::v8i32, Legal);
1101 setOperationAction(ISD::ADD, MVT::v4i64, Custom);
1102 setOperationAction(ISD::ADD, MVT::v8i32, Custom);
1103 setOperationAction(ISD::ADD, MVT::v16i16, Custom);
1104 setOperationAction(ISD::ADD, MVT::v32i8, Custom);
1106 setOperationAction(ISD::SUB, MVT::v4i64, Custom);
1107 setOperationAction(ISD::SUB, MVT::v8i32, Custom);
1108 setOperationAction(ISD::SUB, MVT::v16i16, Custom);
1109 setOperationAction(ISD::SUB, MVT::v32i8, Custom);
1111 setOperationAction(ISD::MUL, MVT::v4i64, Custom);
1112 setOperationAction(ISD::MUL, MVT::v8i32, Custom);
1113 setOperationAction(ISD::MUL, MVT::v16i16, Custom);
1114 // Don't lower v32i8 because there is no 128-bit byte mul
1116 setOperationAction(ISD::SRL, MVT::v4i64, Custom);
1117 setOperationAction(ISD::SRL, MVT::v8i32, Custom);
1119 setOperationAction(ISD::SHL, MVT::v4i64, Custom);
1120 setOperationAction(ISD::SHL, MVT::v8i32, Custom);
1122 setOperationAction(ISD::SRA, MVT::v8i32, Custom);
1125 // Custom lower several nodes for 256-bit types.
1126 for (unsigned i = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
1127 i <= (unsigned)MVT::LAST_VECTOR_VALUETYPE; ++i) {
1128 MVT::SimpleValueType SVT = (MVT::SimpleValueType)i;
1131 // Extract subvector is special because the value type
1132 // (result) is 128-bit but the source is 256-bit wide.
1133 if (VT.is128BitVector())
1134 setOperationAction(ISD::EXTRACT_SUBVECTOR, SVT, Custom);
1136 // Do not attempt to custom lower other non-256-bit vectors
1137 if (!VT.is256BitVector())
1140 setOperationAction(ISD::BUILD_VECTOR, SVT, Custom);
1141 setOperationAction(ISD::VECTOR_SHUFFLE, SVT, Custom);
1142 setOperationAction(ISD::INSERT_VECTOR_ELT, SVT, Custom);
1143 setOperationAction(ISD::EXTRACT_VECTOR_ELT, SVT, Custom);
1144 setOperationAction(ISD::SCALAR_TO_VECTOR, SVT, Custom);
1145 setOperationAction(ISD::INSERT_SUBVECTOR, SVT, Custom);
1148 // Promote v32i8, v16i16, v8i32 select, and, or, xor to v4i64.
1149 for (unsigned i = (unsigned)MVT::v32i8; i != (unsigned)MVT::v4i64; ++i) {
1150 MVT::SimpleValueType SVT = (MVT::SimpleValueType)i;
1153 // Do not attempt to promote non-256-bit vectors
1154 if (!VT.is256BitVector())
1157 setOperationAction(ISD::AND, SVT, Promote);
1158 AddPromotedToType (ISD::AND, SVT, MVT::v4i64);
1159 setOperationAction(ISD::OR, SVT, Promote);
1160 AddPromotedToType (ISD::OR, SVT, MVT::v4i64);
1161 setOperationAction(ISD::XOR, SVT, Promote);
1162 AddPromotedToType (ISD::XOR, SVT, MVT::v4i64);
1163 setOperationAction(ISD::LOAD, SVT, Promote);
1164 AddPromotedToType (ISD::LOAD, SVT, MVT::v4i64);
1165 setOperationAction(ISD::SELECT, SVT, Promote);
1166 AddPromotedToType (ISD::SELECT, SVT, MVT::v4i64);
1170 // SIGN_EXTEND_INREGs are evaluated by the extend type. Handle the expansion
1171 // of this type with custom code.
1172 for (unsigned VT = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
1173 VT != (unsigned)MVT::LAST_VECTOR_VALUETYPE; VT++) {
1174 setOperationAction(ISD::SIGN_EXTEND_INREG, (MVT::SimpleValueType)VT,
1178 // We want to custom lower some of our intrinsics.
1179 setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
1182 // Only custom-lower 64-bit SADDO and friends on 64-bit because we don't
1183 // handle type legalization for these operations here.
1185 // FIXME: We really should do custom legalization for addition and
1186 // subtraction on x86-32 once PR3203 is fixed. We really can't do much better
1187 // than generic legalization for 64-bit multiplication-with-overflow, though.
1188 for (unsigned i = 0, e = 3+Subtarget->is64Bit(); i != e; ++i) {
1189 // Add/Sub/Mul with overflow operations are custom lowered.
1191 setOperationAction(ISD::SADDO, VT, Custom);
1192 setOperationAction(ISD::UADDO, VT, Custom);
1193 setOperationAction(ISD::SSUBO, VT, Custom);
1194 setOperationAction(ISD::USUBO, VT, Custom);
1195 setOperationAction(ISD::SMULO, VT, Custom);
1196 setOperationAction(ISD::UMULO, VT, Custom);
1199 // There are no 8-bit 3-address imul/mul instructions
1200 setOperationAction(ISD::SMULO, MVT::i8, Expand);
1201 setOperationAction(ISD::UMULO, MVT::i8, Expand);
1203 if (!Subtarget->is64Bit()) {
1204 // These libcalls are not available in 32-bit.
1205 setLibcallName(RTLIB::SHL_I128, 0);
1206 setLibcallName(RTLIB::SRL_I128, 0);
1207 setLibcallName(RTLIB::SRA_I128, 0);
1210 // We have target-specific dag combine patterns for the following nodes:
1211 setTargetDAGCombine(ISD::VECTOR_SHUFFLE);
1212 setTargetDAGCombine(ISD::EXTRACT_VECTOR_ELT);
1213 setTargetDAGCombine(ISD::VSELECT);
1214 setTargetDAGCombine(ISD::SELECT);
1215 setTargetDAGCombine(ISD::SHL);
1216 setTargetDAGCombine(ISD::SRA);
1217 setTargetDAGCombine(ISD::SRL);
1218 setTargetDAGCombine(ISD::OR);
1219 setTargetDAGCombine(ISD::AND);
1220 setTargetDAGCombine(ISD::ADD);
1221 setTargetDAGCombine(ISD::FADD);
1222 setTargetDAGCombine(ISD::FSUB);
1223 setTargetDAGCombine(ISD::SUB);
1224 setTargetDAGCombine(ISD::LOAD);
1225 setTargetDAGCombine(ISD::STORE);
1226 setTargetDAGCombine(ISD::ZERO_EXTEND);
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) const {
1582 if (N->getNumValues() != 1)
1584 if (!N->hasNUsesOfValue(1, 0))
1587 SDNode *Copy = *N->use_begin();
1588 if (Copy->getOpcode() != ISD::CopyToReg &&
1589 Copy->getOpcode() != ISD::FP_EXTEND)
1592 bool HasRet = false;
1593 for (SDNode::use_iterator UI = Copy->use_begin(), UE = Copy->use_end();
1595 if (UI->getOpcode() != X86ISD::RET_FLAG)
1604 X86TargetLowering::getTypeForExtArgOrReturn(LLVMContext &Context, EVT VT,
1605 ISD::NodeType ExtendKind) const {
1607 // TODO: Is this also valid on 32-bit?
1608 if (Subtarget->is64Bit() && VT == MVT::i1 && ExtendKind == ISD::ZERO_EXTEND)
1609 ReturnMVT = MVT::i8;
1611 ReturnMVT = MVT::i32;
1613 EVT MinVT = getRegisterType(Context, ReturnMVT);
1614 return VT.bitsLT(MinVT) ? MinVT : VT;
1617 /// LowerCallResult - Lower the result values of a call into the
1618 /// appropriate copies out of appropriate physical registers.
1621 X86TargetLowering::LowerCallResult(SDValue Chain, SDValue InFlag,
1622 CallingConv::ID CallConv, bool isVarArg,
1623 const SmallVectorImpl<ISD::InputArg> &Ins,
1624 DebugLoc dl, SelectionDAG &DAG,
1625 SmallVectorImpl<SDValue> &InVals) const {
1627 // Assign locations to each value returned by this call.
1628 SmallVector<CCValAssign, 16> RVLocs;
1629 bool Is64Bit = Subtarget->is64Bit();
1630 CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
1631 getTargetMachine(), RVLocs, *DAG.getContext());
1632 CCInfo.AnalyzeCallResult(Ins, RetCC_X86);
1634 // Copy all of the result registers out of their specified physreg.
1635 for (unsigned i = 0; i != RVLocs.size(); ++i) {
1636 CCValAssign &VA = RVLocs[i];
1637 EVT CopyVT = VA.getValVT();
1639 // If this is x86-64, and we disabled SSE, we can't return FP values
1640 if ((CopyVT == MVT::f32 || CopyVT == MVT::f64) &&
1641 ((Is64Bit || Ins[i].Flags.isInReg()) && !Subtarget->hasSSE1())) {
1642 report_fatal_error("SSE register return with SSE disabled");
1647 // If this is a call to a function that returns an fp value on the floating
1648 // point stack, we must guarantee the the value is popped from the stack, so
1649 // a CopyFromReg is not good enough - the copy instruction may be eliminated
1650 // if the return value is not used. We use the FpPOP_RETVAL instruction
1652 if (VA.getLocReg() == X86::ST0 || VA.getLocReg() == X86::ST1) {
1653 // If we prefer to use the value in xmm registers, copy it out as f80 and
1654 // use a truncate to move it from fp stack reg to xmm reg.
1655 if (isScalarFPTypeInSSEReg(VA.getValVT())) CopyVT = MVT::f80;
1656 SDValue Ops[] = { Chain, InFlag };
1657 Chain = SDValue(DAG.getMachineNode(X86::FpPOP_RETVAL, dl, CopyVT,
1658 MVT::Other, MVT::Glue, Ops, 2), 1);
1659 Val = Chain.getValue(0);
1661 // Round the f80 to the right size, which also moves it to the appropriate
1663 if (CopyVT != VA.getValVT())
1664 Val = DAG.getNode(ISD::FP_ROUND, dl, VA.getValVT(), Val,
1665 // This truncation won't change the value.
1666 DAG.getIntPtrConstant(1));
1668 Chain = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(),
1669 CopyVT, InFlag).getValue(1);
1670 Val = Chain.getValue(0);
1672 InFlag = Chain.getValue(2);
1673 InVals.push_back(Val);
1680 //===----------------------------------------------------------------------===//
1681 // C & StdCall & Fast Calling Convention implementation
1682 //===----------------------------------------------------------------------===//
1683 // StdCall calling convention seems to be standard for many Windows' API
1684 // routines and around. It differs from C calling convention just a little:
1685 // callee should clean up the stack, not caller. Symbols should be also
1686 // decorated in some fancy way :) It doesn't support any vector arguments.
1687 // For info on fast calling convention see Fast Calling Convention (tail call)
1688 // implementation LowerX86_32FastCCCallTo.
1690 /// CallIsStructReturn - Determines whether a call uses struct return
1692 static bool CallIsStructReturn(const SmallVectorImpl<ISD::OutputArg> &Outs) {
1696 return Outs[0].Flags.isSRet();
1699 /// ArgsAreStructReturn - Determines whether a function uses struct
1700 /// return semantics.
1702 ArgsAreStructReturn(const SmallVectorImpl<ISD::InputArg> &Ins) {
1706 return Ins[0].Flags.isSRet();
1709 /// CreateCopyOfByValArgument - Make a copy of an aggregate at address specified
1710 /// by "Src" to address "Dst" with size and alignment information specified by
1711 /// the specific parameter attribute. The copy will be passed as a byval
1712 /// function parameter.
1714 CreateCopyOfByValArgument(SDValue Src, SDValue Dst, SDValue Chain,
1715 ISD::ArgFlagsTy Flags, SelectionDAG &DAG,
1717 SDValue SizeNode = DAG.getConstant(Flags.getByValSize(), MVT::i32);
1719 return DAG.getMemcpy(Chain, dl, Dst, Src, SizeNode, Flags.getByValAlign(),
1720 /*isVolatile*/false, /*AlwaysInline=*/true,
1721 MachinePointerInfo(), MachinePointerInfo());
1724 /// IsTailCallConvention - Return true if the calling convention is one that
1725 /// supports tail call optimization.
1726 static bool IsTailCallConvention(CallingConv::ID CC) {
1727 return (CC == CallingConv::Fast || CC == CallingConv::GHC);
1730 bool X86TargetLowering::mayBeEmittedAsTailCall(CallInst *CI) const {
1731 if (!CI->isTailCall())
1735 CallingConv::ID CalleeCC = CS.getCallingConv();
1736 if (!IsTailCallConvention(CalleeCC) && CalleeCC != CallingConv::C)
1742 /// FuncIsMadeTailCallSafe - Return true if the function is being made into
1743 /// a tailcall target by changing its ABI.
1744 static bool FuncIsMadeTailCallSafe(CallingConv::ID CC,
1745 bool GuaranteedTailCallOpt) {
1746 return GuaranteedTailCallOpt && IsTailCallConvention(CC);
1750 X86TargetLowering::LowerMemArgument(SDValue Chain,
1751 CallingConv::ID CallConv,
1752 const SmallVectorImpl<ISD::InputArg> &Ins,
1753 DebugLoc dl, SelectionDAG &DAG,
1754 const CCValAssign &VA,
1755 MachineFrameInfo *MFI,
1757 // Create the nodes corresponding to a load from this parameter slot.
1758 ISD::ArgFlagsTy Flags = Ins[i].Flags;
1759 bool AlwaysUseMutable = FuncIsMadeTailCallSafe(CallConv,
1760 getTargetMachine().Options.GuaranteedTailCallOpt);
1761 bool isImmutable = !AlwaysUseMutable && !Flags.isByVal();
1764 // If value is passed by pointer we have address passed instead of the value
1766 if (VA.getLocInfo() == CCValAssign::Indirect)
1767 ValVT = VA.getLocVT();
1769 ValVT = VA.getValVT();
1771 // FIXME: For now, all byval parameter objects are marked mutable. This can be
1772 // changed with more analysis.
1773 // In case of tail call optimization mark all arguments mutable. Since they
1774 // could be overwritten by lowering of arguments in case of a tail call.
1775 if (Flags.isByVal()) {
1776 unsigned Bytes = Flags.getByValSize();
1777 if (Bytes == 0) Bytes = 1; // Don't create zero-sized stack objects.
1778 int FI = MFI->CreateFixedObject(Bytes, VA.getLocMemOffset(), isImmutable);
1779 return DAG.getFrameIndex(FI, getPointerTy());
1781 int FI = MFI->CreateFixedObject(ValVT.getSizeInBits()/8,
1782 VA.getLocMemOffset(), isImmutable);
1783 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
1784 return DAG.getLoad(ValVT, dl, Chain, FIN,
1785 MachinePointerInfo::getFixedStack(FI),
1786 false, false, false, 0);
1791 X86TargetLowering::LowerFormalArguments(SDValue Chain,
1792 CallingConv::ID CallConv,
1794 const SmallVectorImpl<ISD::InputArg> &Ins,
1797 SmallVectorImpl<SDValue> &InVals)
1799 MachineFunction &MF = DAG.getMachineFunction();
1800 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
1802 const Function* Fn = MF.getFunction();
1803 if (Fn->hasExternalLinkage() &&
1804 Subtarget->isTargetCygMing() &&
1805 Fn->getName() == "main")
1806 FuncInfo->setForceFramePointer(true);
1808 MachineFrameInfo *MFI = MF.getFrameInfo();
1809 bool Is64Bit = Subtarget->is64Bit();
1810 bool IsWin64 = Subtarget->isTargetWin64();
1812 assert(!(isVarArg && IsTailCallConvention(CallConv)) &&
1813 "Var args not supported with calling convention fastcc or ghc");
1815 // Assign locations to all of the incoming arguments.
1816 SmallVector<CCValAssign, 16> ArgLocs;
1817 CCState CCInfo(CallConv, isVarArg, MF, getTargetMachine(),
1818 ArgLocs, *DAG.getContext());
1820 // Allocate shadow area for Win64
1822 CCInfo.AllocateStack(32, 8);
1825 CCInfo.AnalyzeFormalArguments(Ins, CC_X86);
1827 unsigned LastVal = ~0U;
1829 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
1830 CCValAssign &VA = ArgLocs[i];
1831 // TODO: If an arg is passed in two places (e.g. reg and stack), skip later
1833 assert(VA.getValNo() != LastVal &&
1834 "Don't support value assigned to multiple locs yet");
1836 LastVal = VA.getValNo();
1838 if (VA.isRegLoc()) {
1839 EVT RegVT = VA.getLocVT();
1840 TargetRegisterClass *RC = NULL;
1841 if (RegVT == MVT::i32)
1842 RC = X86::GR32RegisterClass;
1843 else if (Is64Bit && RegVT == MVT::i64)
1844 RC = X86::GR64RegisterClass;
1845 else if (RegVT == MVT::f32)
1846 RC = X86::FR32RegisterClass;
1847 else if (RegVT == MVT::f64)
1848 RC = X86::FR64RegisterClass;
1849 else if (RegVT.isVector() && RegVT.getSizeInBits() == 256)
1850 RC = X86::VR256RegisterClass;
1851 else if (RegVT.isVector() && RegVT.getSizeInBits() == 128)
1852 RC = X86::VR128RegisterClass;
1853 else if (RegVT == MVT::x86mmx)
1854 RC = X86::VR64RegisterClass;
1856 llvm_unreachable("Unknown argument type!");
1858 unsigned Reg = MF.addLiveIn(VA.getLocReg(), RC);
1859 ArgValue = DAG.getCopyFromReg(Chain, dl, Reg, RegVT);
1861 // If this is an 8 or 16-bit value, it is really passed promoted to 32
1862 // bits. Insert an assert[sz]ext to capture this, then truncate to the
1864 if (VA.getLocInfo() == CCValAssign::SExt)
1865 ArgValue = DAG.getNode(ISD::AssertSext, dl, RegVT, ArgValue,
1866 DAG.getValueType(VA.getValVT()));
1867 else if (VA.getLocInfo() == CCValAssign::ZExt)
1868 ArgValue = DAG.getNode(ISD::AssertZext, dl, RegVT, ArgValue,
1869 DAG.getValueType(VA.getValVT()));
1870 else if (VA.getLocInfo() == CCValAssign::BCvt)
1871 ArgValue = DAG.getNode(ISD::BITCAST, dl, VA.getValVT(), ArgValue);
1873 if (VA.isExtInLoc()) {
1874 // Handle MMX values passed in XMM regs.
1875 if (RegVT.isVector()) {
1876 ArgValue = DAG.getNode(X86ISD::MOVDQ2Q, dl, VA.getValVT(),
1879 ArgValue = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), ArgValue);
1882 assert(VA.isMemLoc());
1883 ArgValue = LowerMemArgument(Chain, CallConv, Ins, dl, DAG, VA, MFI, i);
1886 // If value is passed via pointer - do a load.
1887 if (VA.getLocInfo() == CCValAssign::Indirect)
1888 ArgValue = DAG.getLoad(VA.getValVT(), dl, Chain, ArgValue,
1889 MachinePointerInfo(), false, false, false, 0);
1891 InVals.push_back(ArgValue);
1894 // The x86-64 ABI for returning structs by value requires that we copy
1895 // the sret argument into %rax for the return. Save the argument into
1896 // a virtual register so that we can access it from the return points.
1897 if (Is64Bit && MF.getFunction()->hasStructRetAttr()) {
1898 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
1899 unsigned Reg = FuncInfo->getSRetReturnReg();
1901 Reg = MF.getRegInfo().createVirtualRegister(getRegClassFor(MVT::i64));
1902 FuncInfo->setSRetReturnReg(Reg);
1904 SDValue Copy = DAG.getCopyToReg(DAG.getEntryNode(), dl, Reg, InVals[0]);
1905 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Copy, Chain);
1908 unsigned StackSize = CCInfo.getNextStackOffset();
1909 // Align stack specially for tail calls.
1910 if (FuncIsMadeTailCallSafe(CallConv,
1911 MF.getTarget().Options.GuaranteedTailCallOpt))
1912 StackSize = GetAlignedArgumentStackSize(StackSize, DAG);
1914 // If the function takes variable number of arguments, make a frame index for
1915 // the start of the first vararg value... for expansion of llvm.va_start.
1917 if (Is64Bit || (CallConv != CallingConv::X86_FastCall &&
1918 CallConv != CallingConv::X86_ThisCall)) {
1919 FuncInfo->setVarArgsFrameIndex(MFI->CreateFixedObject(1, StackSize,true));
1922 unsigned TotalNumIntRegs = 0, TotalNumXMMRegs = 0;
1924 // FIXME: We should really autogenerate these arrays
1925 static const unsigned GPR64ArgRegsWin64[] = {
1926 X86::RCX, X86::RDX, X86::R8, X86::R9
1928 static const unsigned GPR64ArgRegs64Bit[] = {
1929 X86::RDI, X86::RSI, X86::RDX, X86::RCX, X86::R8, X86::R9
1931 static const unsigned XMMArgRegs64Bit[] = {
1932 X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3,
1933 X86::XMM4, X86::XMM5, X86::XMM6, X86::XMM7
1935 const unsigned *GPR64ArgRegs;
1936 unsigned NumXMMRegs = 0;
1939 // The XMM registers which might contain var arg parameters are shadowed
1940 // in their paired GPR. So we only need to save the GPR to their home
1942 TotalNumIntRegs = 4;
1943 GPR64ArgRegs = GPR64ArgRegsWin64;
1945 TotalNumIntRegs = 6; TotalNumXMMRegs = 8;
1946 GPR64ArgRegs = GPR64ArgRegs64Bit;
1948 NumXMMRegs = CCInfo.getFirstUnallocated(XMMArgRegs64Bit,
1951 unsigned NumIntRegs = CCInfo.getFirstUnallocated(GPR64ArgRegs,
1954 bool NoImplicitFloatOps = Fn->hasFnAttr(Attribute::NoImplicitFloat);
1955 assert(!(NumXMMRegs && !Subtarget->hasSSE1()) &&
1956 "SSE register cannot be used when SSE is disabled!");
1957 assert(!(NumXMMRegs && MF.getTarget().Options.UseSoftFloat &&
1958 NoImplicitFloatOps) &&
1959 "SSE register cannot be used when SSE is disabled!");
1960 if (MF.getTarget().Options.UseSoftFloat || NoImplicitFloatOps ||
1961 !Subtarget->hasSSE1())
1962 // Kernel mode asks for SSE to be disabled, so don't push them
1964 TotalNumXMMRegs = 0;
1967 const TargetFrameLowering &TFI = *getTargetMachine().getFrameLowering();
1968 // Get to the caller-allocated home save location. Add 8 to account
1969 // for the return address.
1970 int HomeOffset = TFI.getOffsetOfLocalArea() + 8;
1971 FuncInfo->setRegSaveFrameIndex(
1972 MFI->CreateFixedObject(1, NumIntRegs * 8 + HomeOffset, false));
1973 // Fixup to set vararg frame on shadow area (4 x i64).
1975 FuncInfo->setVarArgsFrameIndex(FuncInfo->getRegSaveFrameIndex());
1977 // For X86-64, if there are vararg parameters that are passed via
1978 // registers, then we must store them to their spots on the stack so
1979 // they may be loaded by deferencing the result of va_next.
1980 FuncInfo->setVarArgsGPOffset(NumIntRegs * 8);
1981 FuncInfo->setVarArgsFPOffset(TotalNumIntRegs * 8 + NumXMMRegs * 16);
1982 FuncInfo->setRegSaveFrameIndex(
1983 MFI->CreateStackObject(TotalNumIntRegs * 8 + TotalNumXMMRegs * 16, 16,
1987 // Store the integer parameter registers.
1988 SmallVector<SDValue, 8> MemOps;
1989 SDValue RSFIN = DAG.getFrameIndex(FuncInfo->getRegSaveFrameIndex(),
1991 unsigned Offset = FuncInfo->getVarArgsGPOffset();
1992 for (; NumIntRegs != TotalNumIntRegs; ++NumIntRegs) {
1993 SDValue FIN = DAG.getNode(ISD::ADD, dl, getPointerTy(), RSFIN,
1994 DAG.getIntPtrConstant(Offset));
1995 unsigned VReg = MF.addLiveIn(GPR64ArgRegs[NumIntRegs],
1996 X86::GR64RegisterClass);
1997 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i64);
1999 DAG.getStore(Val.getValue(1), dl, Val, FIN,
2000 MachinePointerInfo::getFixedStack(
2001 FuncInfo->getRegSaveFrameIndex(), Offset),
2003 MemOps.push_back(Store);
2007 if (TotalNumXMMRegs != 0 && NumXMMRegs != TotalNumXMMRegs) {
2008 // Now store the XMM (fp + vector) parameter registers.
2009 SmallVector<SDValue, 11> SaveXMMOps;
2010 SaveXMMOps.push_back(Chain);
2012 unsigned AL = MF.addLiveIn(X86::AL, X86::GR8RegisterClass);
2013 SDValue ALVal = DAG.getCopyFromReg(DAG.getEntryNode(), dl, AL, MVT::i8);
2014 SaveXMMOps.push_back(ALVal);
2016 SaveXMMOps.push_back(DAG.getIntPtrConstant(
2017 FuncInfo->getRegSaveFrameIndex()));
2018 SaveXMMOps.push_back(DAG.getIntPtrConstant(
2019 FuncInfo->getVarArgsFPOffset()));
2021 for (; NumXMMRegs != TotalNumXMMRegs; ++NumXMMRegs) {
2022 unsigned VReg = MF.addLiveIn(XMMArgRegs64Bit[NumXMMRegs],
2023 X86::VR128RegisterClass);
2024 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, MVT::v4f32);
2025 SaveXMMOps.push_back(Val);
2027 MemOps.push_back(DAG.getNode(X86ISD::VASTART_SAVE_XMM_REGS, dl,
2029 &SaveXMMOps[0], SaveXMMOps.size()));
2032 if (!MemOps.empty())
2033 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
2034 &MemOps[0], MemOps.size());
2038 // Some CCs need callee pop.
2039 if (X86::isCalleePop(CallConv, Is64Bit, isVarArg,
2040 MF.getTarget().Options.GuaranteedTailCallOpt)) {
2041 FuncInfo->setBytesToPopOnReturn(StackSize); // Callee pops everything.
2043 FuncInfo->setBytesToPopOnReturn(0); // Callee pops nothing.
2044 // If this is an sret function, the return should pop the hidden pointer.
2045 if (!Is64Bit && !IsTailCallConvention(CallConv) && ArgsAreStructReturn(Ins))
2046 FuncInfo->setBytesToPopOnReturn(4);
2050 // RegSaveFrameIndex is X86-64 only.
2051 FuncInfo->setRegSaveFrameIndex(0xAAAAAAA);
2052 if (CallConv == CallingConv::X86_FastCall ||
2053 CallConv == CallingConv::X86_ThisCall)
2054 // fastcc functions can't have varargs.
2055 FuncInfo->setVarArgsFrameIndex(0xAAAAAAA);
2058 FuncInfo->setArgumentStackSize(StackSize);
2064 X86TargetLowering::LowerMemOpCallTo(SDValue Chain,
2065 SDValue StackPtr, SDValue Arg,
2066 DebugLoc dl, SelectionDAG &DAG,
2067 const CCValAssign &VA,
2068 ISD::ArgFlagsTy Flags) const {
2069 unsigned LocMemOffset = VA.getLocMemOffset();
2070 SDValue PtrOff = DAG.getIntPtrConstant(LocMemOffset);
2071 PtrOff = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr, PtrOff);
2072 if (Flags.isByVal())
2073 return CreateCopyOfByValArgument(Arg, PtrOff, Chain, Flags, DAG, dl);
2075 return DAG.getStore(Chain, dl, Arg, PtrOff,
2076 MachinePointerInfo::getStack(LocMemOffset),
2080 /// EmitTailCallLoadRetAddr - Emit a load of return address if tail call
2081 /// optimization is performed and it is required.
2083 X86TargetLowering::EmitTailCallLoadRetAddr(SelectionDAG &DAG,
2084 SDValue &OutRetAddr, SDValue Chain,
2085 bool IsTailCall, bool Is64Bit,
2086 int FPDiff, DebugLoc dl) const {
2087 // Adjust the Return address stack slot.
2088 EVT VT = getPointerTy();
2089 OutRetAddr = getReturnAddressFrameIndex(DAG);
2091 // Load the "old" Return address.
2092 OutRetAddr = DAG.getLoad(VT, dl, Chain, OutRetAddr, MachinePointerInfo(),
2093 false, false, false, 0);
2094 return SDValue(OutRetAddr.getNode(), 1);
2097 /// EmitTailCallStoreRetAddr - Emit a store of the return address if tail call
2098 /// optimization is performed and it is required (FPDiff!=0).
2100 EmitTailCallStoreRetAddr(SelectionDAG & DAG, MachineFunction &MF,
2101 SDValue Chain, SDValue RetAddrFrIdx,
2102 bool Is64Bit, int FPDiff, DebugLoc dl) {
2103 // Store the return address to the appropriate stack slot.
2104 if (!FPDiff) return Chain;
2105 // Calculate the new stack slot for the return address.
2106 int SlotSize = Is64Bit ? 8 : 4;
2107 int NewReturnAddrFI =
2108 MF.getFrameInfo()->CreateFixedObject(SlotSize, FPDiff-SlotSize, false);
2109 EVT VT = Is64Bit ? MVT::i64 : MVT::i32;
2110 SDValue NewRetAddrFrIdx = DAG.getFrameIndex(NewReturnAddrFI, VT);
2111 Chain = DAG.getStore(Chain, dl, RetAddrFrIdx, NewRetAddrFrIdx,
2112 MachinePointerInfo::getFixedStack(NewReturnAddrFI),
2118 X86TargetLowering::LowerCall(SDValue Chain, SDValue Callee,
2119 CallingConv::ID CallConv, bool isVarArg,
2121 const SmallVectorImpl<ISD::OutputArg> &Outs,
2122 const SmallVectorImpl<SDValue> &OutVals,
2123 const SmallVectorImpl<ISD::InputArg> &Ins,
2124 DebugLoc dl, SelectionDAG &DAG,
2125 SmallVectorImpl<SDValue> &InVals) const {
2126 MachineFunction &MF = DAG.getMachineFunction();
2127 bool Is64Bit = Subtarget->is64Bit();
2128 bool IsWin64 = Subtarget->isTargetWin64();
2129 bool IsStructRet = CallIsStructReturn(Outs);
2130 bool IsSibcall = false;
2133 // Check if it's really possible to do a tail call.
2134 isTailCall = IsEligibleForTailCallOptimization(Callee, CallConv,
2135 isVarArg, IsStructRet, MF.getFunction()->hasStructRetAttr(),
2136 Outs, OutVals, Ins, DAG);
2138 // Sibcalls are automatically detected tailcalls which do not require
2140 if (!MF.getTarget().Options.GuaranteedTailCallOpt && isTailCall)
2147 assert(!(isVarArg && IsTailCallConvention(CallConv)) &&
2148 "Var args not supported with calling convention fastcc or ghc");
2150 // Analyze operands of the call, assigning locations to each operand.
2151 SmallVector<CCValAssign, 16> ArgLocs;
2152 CCState CCInfo(CallConv, isVarArg, MF, getTargetMachine(),
2153 ArgLocs, *DAG.getContext());
2155 // Allocate shadow area for Win64
2157 CCInfo.AllocateStack(32, 8);
2160 CCInfo.AnalyzeCallOperands(Outs, CC_X86);
2162 // Get a count of how many bytes are to be pushed on the stack.
2163 unsigned NumBytes = CCInfo.getNextStackOffset();
2165 // This is a sibcall. The memory operands are available in caller's
2166 // own caller's stack.
2168 else if (getTargetMachine().Options.GuaranteedTailCallOpt &&
2169 IsTailCallConvention(CallConv))
2170 NumBytes = GetAlignedArgumentStackSize(NumBytes, DAG);
2173 if (isTailCall && !IsSibcall) {
2174 // Lower arguments at fp - stackoffset + fpdiff.
2175 unsigned NumBytesCallerPushed =
2176 MF.getInfo<X86MachineFunctionInfo>()->getBytesToPopOnReturn();
2177 FPDiff = NumBytesCallerPushed - NumBytes;
2179 // Set the delta of movement of the returnaddr stackslot.
2180 // But only set if delta is greater than previous delta.
2181 if (FPDiff < (MF.getInfo<X86MachineFunctionInfo>()->getTCReturnAddrDelta()))
2182 MF.getInfo<X86MachineFunctionInfo>()->setTCReturnAddrDelta(FPDiff);
2186 Chain = DAG.getCALLSEQ_START(Chain, DAG.getIntPtrConstant(NumBytes, true));
2188 SDValue RetAddrFrIdx;
2189 // Load return address for tail calls.
2190 if (isTailCall && FPDiff)
2191 Chain = EmitTailCallLoadRetAddr(DAG, RetAddrFrIdx, Chain, isTailCall,
2192 Is64Bit, FPDiff, dl);
2194 SmallVector<std::pair<unsigned, SDValue>, 8> RegsToPass;
2195 SmallVector<SDValue, 8> MemOpChains;
2198 // Walk the register/memloc assignments, inserting copies/loads. In the case
2199 // of tail call optimization arguments are handle later.
2200 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2201 CCValAssign &VA = ArgLocs[i];
2202 EVT RegVT = VA.getLocVT();
2203 SDValue Arg = OutVals[i];
2204 ISD::ArgFlagsTy Flags = Outs[i].Flags;
2205 bool isByVal = Flags.isByVal();
2207 // Promote the value if needed.
2208 switch (VA.getLocInfo()) {
2209 default: llvm_unreachable("Unknown loc info!");
2210 case CCValAssign::Full: break;
2211 case CCValAssign::SExt:
2212 Arg = DAG.getNode(ISD::SIGN_EXTEND, dl, RegVT, Arg);
2214 case CCValAssign::ZExt:
2215 Arg = DAG.getNode(ISD::ZERO_EXTEND, dl, RegVT, Arg);
2217 case CCValAssign::AExt:
2218 if (RegVT.isVector() && RegVT.getSizeInBits() == 128) {
2219 // Special case: passing MMX values in XMM registers.
2220 Arg = DAG.getNode(ISD::BITCAST, dl, MVT::i64, Arg);
2221 Arg = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2i64, Arg);
2222 Arg = getMOVL(DAG, dl, MVT::v2i64, DAG.getUNDEF(MVT::v2i64), Arg);
2224 Arg = DAG.getNode(ISD::ANY_EXTEND, dl, RegVT, Arg);
2226 case CCValAssign::BCvt:
2227 Arg = DAG.getNode(ISD::BITCAST, dl, RegVT, Arg);
2229 case CCValAssign::Indirect: {
2230 // Store the argument.
2231 SDValue SpillSlot = DAG.CreateStackTemporary(VA.getValVT());
2232 int FI = cast<FrameIndexSDNode>(SpillSlot)->getIndex();
2233 Chain = DAG.getStore(Chain, dl, Arg, SpillSlot,
2234 MachinePointerInfo::getFixedStack(FI),
2241 if (VA.isRegLoc()) {
2242 RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
2243 if (isVarArg && IsWin64) {
2244 // Win64 ABI requires argument XMM reg to be copied to the corresponding
2245 // shadow reg if callee is a varargs function.
2246 unsigned ShadowReg = 0;
2247 switch (VA.getLocReg()) {
2248 case X86::XMM0: ShadowReg = X86::RCX; break;
2249 case X86::XMM1: ShadowReg = X86::RDX; break;
2250 case X86::XMM2: ShadowReg = X86::R8; break;
2251 case X86::XMM3: ShadowReg = X86::R9; break;
2254 RegsToPass.push_back(std::make_pair(ShadowReg, Arg));
2256 } else if (!IsSibcall && (!isTailCall || isByVal)) {
2257 assert(VA.isMemLoc());
2258 if (StackPtr.getNode() == 0)
2259 StackPtr = DAG.getCopyFromReg(Chain, dl, X86StackPtr, getPointerTy());
2260 MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, Arg,
2261 dl, DAG, VA, Flags));
2265 if (!MemOpChains.empty())
2266 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
2267 &MemOpChains[0], MemOpChains.size());
2269 // Build a sequence of copy-to-reg nodes chained together with token chain
2270 // and flag operands which copy the outgoing args into registers.
2272 // Tail call byval lowering might overwrite argument registers so in case of
2273 // tail call optimization the copies to registers are lowered later.
2275 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
2276 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
2277 RegsToPass[i].second, InFlag);
2278 InFlag = Chain.getValue(1);
2281 if (Subtarget->isPICStyleGOT()) {
2282 // ELF / PIC requires GOT in the EBX register before function calls via PLT
2285 Chain = DAG.getCopyToReg(Chain, dl, X86::EBX,
2286 DAG.getNode(X86ISD::GlobalBaseReg,
2287 DebugLoc(), getPointerTy()),
2289 InFlag = Chain.getValue(1);
2291 // If we are tail calling and generating PIC/GOT style code load the
2292 // address of the callee into ECX. The value in ecx is used as target of
2293 // the tail jump. This is done to circumvent the ebx/callee-saved problem
2294 // for tail calls on PIC/GOT architectures. Normally we would just put the
2295 // address of GOT into ebx and then call target@PLT. But for tail calls
2296 // ebx would be restored (since ebx is callee saved) before jumping to the
2299 // Note: The actual moving to ECX is done further down.
2300 GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee);
2301 if (G && !G->getGlobal()->hasHiddenVisibility() &&
2302 !G->getGlobal()->hasProtectedVisibility())
2303 Callee = LowerGlobalAddress(Callee, DAG);
2304 else if (isa<ExternalSymbolSDNode>(Callee))
2305 Callee = LowerExternalSymbol(Callee, DAG);
2309 if (Is64Bit && isVarArg && !IsWin64) {
2310 // From AMD64 ABI document:
2311 // For calls that may call functions that use varargs or stdargs
2312 // (prototype-less calls or calls to functions containing ellipsis (...) in
2313 // the declaration) %al is used as hidden argument to specify the number
2314 // of SSE registers used. The contents of %al do not need to match exactly
2315 // the number of registers, but must be an ubound on the number of SSE
2316 // registers used and is in the range 0 - 8 inclusive.
2318 // Count the number of XMM registers allocated.
2319 static const unsigned XMMArgRegs[] = {
2320 X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3,
2321 X86::XMM4, X86::XMM5, X86::XMM6, X86::XMM7
2323 unsigned NumXMMRegs = CCInfo.getFirstUnallocated(XMMArgRegs, 8);
2324 assert((Subtarget->hasSSE1() || !NumXMMRegs)
2325 && "SSE registers cannot be used when SSE is disabled");
2327 Chain = DAG.getCopyToReg(Chain, dl, X86::AL,
2328 DAG.getConstant(NumXMMRegs, MVT::i8), InFlag);
2329 InFlag = Chain.getValue(1);
2333 // For tail calls lower the arguments to the 'real' stack slot.
2335 // Force all the incoming stack arguments to be loaded from the stack
2336 // before any new outgoing arguments are stored to the stack, because the
2337 // outgoing stack slots may alias the incoming argument stack slots, and
2338 // the alias isn't otherwise explicit. This is slightly more conservative
2339 // than necessary, because it means that each store effectively depends
2340 // on every argument instead of just those arguments it would clobber.
2341 SDValue ArgChain = DAG.getStackArgumentTokenFactor(Chain);
2343 SmallVector<SDValue, 8> MemOpChains2;
2346 // Do not flag preceding copytoreg stuff together with the following stuff.
2348 if (getTargetMachine().Options.GuaranteedTailCallOpt) {
2349 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2350 CCValAssign &VA = ArgLocs[i];
2353 assert(VA.isMemLoc());
2354 SDValue Arg = OutVals[i];
2355 ISD::ArgFlagsTy Flags = Outs[i].Flags;
2356 // Create frame index.
2357 int32_t Offset = VA.getLocMemOffset()+FPDiff;
2358 uint32_t OpSize = (VA.getLocVT().getSizeInBits()+7)/8;
2359 FI = MF.getFrameInfo()->CreateFixedObject(OpSize, Offset, true);
2360 FIN = DAG.getFrameIndex(FI, getPointerTy());
2362 if (Flags.isByVal()) {
2363 // Copy relative to framepointer.
2364 SDValue Source = DAG.getIntPtrConstant(VA.getLocMemOffset());
2365 if (StackPtr.getNode() == 0)
2366 StackPtr = DAG.getCopyFromReg(Chain, dl, X86StackPtr,
2368 Source = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr, Source);
2370 MemOpChains2.push_back(CreateCopyOfByValArgument(Source, FIN,
2374 // Store relative to framepointer.
2375 MemOpChains2.push_back(
2376 DAG.getStore(ArgChain, dl, Arg, FIN,
2377 MachinePointerInfo::getFixedStack(FI),
2383 if (!MemOpChains2.empty())
2384 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
2385 &MemOpChains2[0], MemOpChains2.size());
2387 // Copy arguments to their registers.
2388 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
2389 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
2390 RegsToPass[i].second, InFlag);
2391 InFlag = Chain.getValue(1);
2395 // Store the return address to the appropriate stack slot.
2396 Chain = EmitTailCallStoreRetAddr(DAG, MF, Chain, RetAddrFrIdx, Is64Bit,
2400 if (getTargetMachine().getCodeModel() == CodeModel::Large) {
2401 assert(Is64Bit && "Large code model is only legal in 64-bit mode.");
2402 // In the 64-bit large code model, we have to make all calls
2403 // through a register, since the call instruction's 32-bit
2404 // pc-relative offset may not be large enough to hold the whole
2406 } else if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
2407 // If the callee is a GlobalAddress node (quite common, every direct call
2408 // is) turn it into a TargetGlobalAddress node so that legalize doesn't hack
2411 // We should use extra load for direct calls to dllimported functions in
2413 const GlobalValue *GV = G->getGlobal();
2414 if (!GV->hasDLLImportLinkage()) {
2415 unsigned char OpFlags = 0;
2416 bool ExtraLoad = false;
2417 unsigned WrapperKind = ISD::DELETED_NODE;
2419 // On ELF targets, in both X86-64 and X86-32 mode, direct calls to
2420 // external symbols most go through the PLT in PIC mode. If the symbol
2421 // has hidden or protected visibility, or if it is static or local, then
2422 // we don't need to use the PLT - we can directly call it.
2423 if (Subtarget->isTargetELF() &&
2424 getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
2425 GV->hasDefaultVisibility() && !GV->hasLocalLinkage()) {
2426 OpFlags = X86II::MO_PLT;
2427 } else if (Subtarget->isPICStyleStubAny() &&
2428 (GV->isDeclaration() || GV->isWeakForLinker()) &&
2429 (!Subtarget->getTargetTriple().isMacOSX() ||
2430 Subtarget->getTargetTriple().isMacOSXVersionLT(10, 5))) {
2431 // PC-relative references to external symbols should go through $stub,
2432 // unless we're building with the leopard linker or later, which
2433 // automatically synthesizes these stubs.
2434 OpFlags = X86II::MO_DARWIN_STUB;
2435 } else if (Subtarget->isPICStyleRIPRel() &&
2436 isa<Function>(GV) &&
2437 cast<Function>(GV)->hasFnAttr(Attribute::NonLazyBind)) {
2438 // If the function is marked as non-lazy, generate an indirect call
2439 // which loads from the GOT directly. This avoids runtime overhead
2440 // at the cost of eager binding (and one extra byte of encoding).
2441 OpFlags = X86II::MO_GOTPCREL;
2442 WrapperKind = X86ISD::WrapperRIP;
2446 Callee = DAG.getTargetGlobalAddress(GV, dl, getPointerTy(),
2447 G->getOffset(), OpFlags);
2449 // Add a wrapper if needed.
2450 if (WrapperKind != ISD::DELETED_NODE)
2451 Callee = DAG.getNode(X86ISD::WrapperRIP, dl, getPointerTy(), Callee);
2452 // Add extra indirection if needed.
2454 Callee = DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(), Callee,
2455 MachinePointerInfo::getGOT(),
2456 false, false, false, 0);
2458 } else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) {
2459 unsigned char OpFlags = 0;
2461 // On ELF targets, in either X86-64 or X86-32 mode, direct calls to
2462 // external symbols should go through the PLT.
2463 if (Subtarget->isTargetELF() &&
2464 getTargetMachine().getRelocationModel() == Reloc::PIC_) {
2465 OpFlags = X86II::MO_PLT;
2466 } else if (Subtarget->isPICStyleStubAny() &&
2467 (!Subtarget->getTargetTriple().isMacOSX() ||
2468 Subtarget->getTargetTriple().isMacOSXVersionLT(10, 5))) {
2469 // PC-relative references to external symbols should go through $stub,
2470 // unless we're building with the leopard linker or later, which
2471 // automatically synthesizes these stubs.
2472 OpFlags = X86II::MO_DARWIN_STUB;
2475 Callee = DAG.getTargetExternalSymbol(S->getSymbol(), getPointerTy(),
2479 // Returns a chain & a flag for retval copy to use.
2480 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
2481 SmallVector<SDValue, 8> Ops;
2483 if (!IsSibcall && isTailCall) {
2484 Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(NumBytes, true),
2485 DAG.getIntPtrConstant(0, true), InFlag);
2486 InFlag = Chain.getValue(1);
2489 Ops.push_back(Chain);
2490 Ops.push_back(Callee);
2493 Ops.push_back(DAG.getConstant(FPDiff, MVT::i32));
2495 // Add argument registers to the end of the list so that they are known live
2497 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
2498 Ops.push_back(DAG.getRegister(RegsToPass[i].first,
2499 RegsToPass[i].second.getValueType()));
2501 // Add an implicit use GOT pointer in EBX.
2502 if (!isTailCall && Subtarget->isPICStyleGOT())
2503 Ops.push_back(DAG.getRegister(X86::EBX, getPointerTy()));
2505 // Add an implicit use of AL for non-Windows x86 64-bit vararg functions.
2506 if (Is64Bit && isVarArg && !IsWin64)
2507 Ops.push_back(DAG.getRegister(X86::AL, MVT::i8));
2509 if (InFlag.getNode())
2510 Ops.push_back(InFlag);
2514 //// If this is the first return lowered for this function, add the regs
2515 //// to the liveout set for the function.
2516 // This isn't right, although it's probably harmless on x86; liveouts
2517 // should be computed from returns not tail calls. Consider a void
2518 // function making a tail call to a function returning int.
2519 return DAG.getNode(X86ISD::TC_RETURN, dl,
2520 NodeTys, &Ops[0], Ops.size());
2523 Chain = DAG.getNode(X86ISD::CALL, dl, NodeTys, &Ops[0], Ops.size());
2524 InFlag = Chain.getValue(1);
2526 // Create the CALLSEQ_END node.
2527 unsigned NumBytesForCalleeToPush;
2528 if (X86::isCalleePop(CallConv, Is64Bit, isVarArg,
2529 getTargetMachine().Options.GuaranteedTailCallOpt))
2530 NumBytesForCalleeToPush = NumBytes; // Callee pops everything
2531 else if (!Is64Bit && !IsTailCallConvention(CallConv) && IsStructRet)
2532 // If this is a call to a struct-return function, the callee
2533 // pops the hidden struct pointer, so we have to push it back.
2534 // This is common for Darwin/X86, Linux & Mingw32 targets.
2535 NumBytesForCalleeToPush = 4;
2537 NumBytesForCalleeToPush = 0; // Callee pops nothing.
2539 // Returns a flag for retval copy to use.
2541 Chain = DAG.getCALLSEQ_END(Chain,
2542 DAG.getIntPtrConstant(NumBytes, true),
2543 DAG.getIntPtrConstant(NumBytesForCalleeToPush,
2546 InFlag = Chain.getValue(1);
2549 // Handle result values, copying them out of physregs into vregs that we
2551 return LowerCallResult(Chain, InFlag, CallConv, isVarArg,
2552 Ins, dl, DAG, InVals);
2556 //===----------------------------------------------------------------------===//
2557 // Fast Calling Convention (tail call) implementation
2558 //===----------------------------------------------------------------------===//
2560 // Like std call, callee cleans arguments, convention except that ECX is
2561 // reserved for storing the tail called function address. Only 2 registers are
2562 // free for argument passing (inreg). Tail call optimization is performed
2564 // * tailcallopt is enabled
2565 // * caller/callee are fastcc
2566 // On X86_64 architecture with GOT-style position independent code only local
2567 // (within module) calls are supported at the moment.
2568 // To keep the stack aligned according to platform abi the function
2569 // GetAlignedArgumentStackSize ensures that argument delta is always multiples
2570 // of stack alignment. (Dynamic linkers need this - darwin's dyld for example)
2571 // If a tail called function callee has more arguments than the caller the
2572 // caller needs to make sure that there is room to move the RETADDR to. This is
2573 // achieved by reserving an area the size of the argument delta right after the
2574 // original REtADDR, but before the saved framepointer or the spilled registers
2575 // e.g. caller(arg1, arg2) calls callee(arg1, arg2,arg3,arg4)
2587 /// GetAlignedArgumentStackSize - Make the stack size align e.g 16n + 12 aligned
2588 /// for a 16 byte align requirement.
2590 X86TargetLowering::GetAlignedArgumentStackSize(unsigned StackSize,
2591 SelectionDAG& DAG) const {
2592 MachineFunction &MF = DAG.getMachineFunction();
2593 const TargetMachine &TM = MF.getTarget();
2594 const TargetFrameLowering &TFI = *TM.getFrameLowering();
2595 unsigned StackAlignment = TFI.getStackAlignment();
2596 uint64_t AlignMask = StackAlignment - 1;
2597 int64_t Offset = StackSize;
2598 uint64_t SlotSize = TD->getPointerSize();
2599 if ( (Offset & AlignMask) <= (StackAlignment - SlotSize) ) {
2600 // Number smaller than 12 so just add the difference.
2601 Offset += ((StackAlignment - SlotSize) - (Offset & AlignMask));
2603 // Mask out lower bits, add stackalignment once plus the 12 bytes.
2604 Offset = ((~AlignMask) & Offset) + StackAlignment +
2605 (StackAlignment-SlotSize);
2610 /// MatchingStackOffset - Return true if the given stack call argument is
2611 /// already available in the same position (relatively) of the caller's
2612 /// incoming argument stack.
2614 bool MatchingStackOffset(SDValue Arg, unsigned Offset, ISD::ArgFlagsTy Flags,
2615 MachineFrameInfo *MFI, const MachineRegisterInfo *MRI,
2616 const X86InstrInfo *TII) {
2617 unsigned Bytes = Arg.getValueType().getSizeInBits() / 8;
2619 if (Arg.getOpcode() == ISD::CopyFromReg) {
2620 unsigned VR = cast<RegisterSDNode>(Arg.getOperand(1))->getReg();
2621 if (!TargetRegisterInfo::isVirtualRegister(VR))
2623 MachineInstr *Def = MRI->getVRegDef(VR);
2626 if (!Flags.isByVal()) {
2627 if (!TII->isLoadFromStackSlot(Def, FI))
2630 unsigned Opcode = Def->getOpcode();
2631 if ((Opcode == X86::LEA32r || Opcode == X86::LEA64r) &&
2632 Def->getOperand(1).isFI()) {
2633 FI = Def->getOperand(1).getIndex();
2634 Bytes = Flags.getByValSize();
2638 } else if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Arg)) {
2639 if (Flags.isByVal())
2640 // ByVal argument is passed in as a pointer but it's now being
2641 // dereferenced. e.g.
2642 // define @foo(%struct.X* %A) {
2643 // tail call @bar(%struct.X* byval %A)
2646 SDValue Ptr = Ld->getBasePtr();
2647 FrameIndexSDNode *FINode = dyn_cast<FrameIndexSDNode>(Ptr);
2650 FI = FINode->getIndex();
2651 } else if (Arg.getOpcode() == ISD::FrameIndex && Flags.isByVal()) {
2652 FrameIndexSDNode *FINode = cast<FrameIndexSDNode>(Arg);
2653 FI = FINode->getIndex();
2654 Bytes = Flags.getByValSize();
2658 assert(FI != INT_MAX);
2659 if (!MFI->isFixedObjectIndex(FI))
2661 return Offset == MFI->getObjectOffset(FI) && Bytes == MFI->getObjectSize(FI);
2664 /// IsEligibleForTailCallOptimization - Check whether the call is eligible
2665 /// for tail call optimization. Targets which want to do tail call
2666 /// optimization should implement this function.
2668 X86TargetLowering::IsEligibleForTailCallOptimization(SDValue Callee,
2669 CallingConv::ID CalleeCC,
2671 bool isCalleeStructRet,
2672 bool isCallerStructRet,
2673 const SmallVectorImpl<ISD::OutputArg> &Outs,
2674 const SmallVectorImpl<SDValue> &OutVals,
2675 const SmallVectorImpl<ISD::InputArg> &Ins,
2676 SelectionDAG& DAG) const {
2677 if (!IsTailCallConvention(CalleeCC) &&
2678 CalleeCC != CallingConv::C)
2681 // If -tailcallopt is specified, make fastcc functions tail-callable.
2682 const MachineFunction &MF = DAG.getMachineFunction();
2683 const Function *CallerF = DAG.getMachineFunction().getFunction();
2684 CallingConv::ID CallerCC = CallerF->getCallingConv();
2685 bool CCMatch = CallerCC == CalleeCC;
2687 if (getTargetMachine().Options.GuaranteedTailCallOpt) {
2688 if (IsTailCallConvention(CalleeCC) && CCMatch)
2693 // Look for obvious safe cases to perform tail call optimization that do not
2694 // require ABI changes. This is what gcc calls sibcall.
2696 // Can't do sibcall if stack needs to be dynamically re-aligned. PEI needs to
2697 // emit a special epilogue.
2698 if (RegInfo->needsStackRealignment(MF))
2701 // Also avoid sibcall optimization if either caller or callee uses struct
2702 // return semantics.
2703 if (isCalleeStructRet || isCallerStructRet)
2706 // An stdcall caller is expected to clean up its arguments; the callee
2707 // isn't going to do that.
2708 if (!CCMatch && CallerCC==CallingConv::X86_StdCall)
2711 // Do not sibcall optimize vararg calls unless all arguments are passed via
2713 if (isVarArg && !Outs.empty()) {
2715 // Optimizing for varargs on Win64 is unlikely to be safe without
2716 // additional testing.
2717 if (Subtarget->isTargetWin64())
2720 SmallVector<CCValAssign, 16> ArgLocs;
2721 CCState CCInfo(CalleeCC, isVarArg, DAG.getMachineFunction(),
2722 getTargetMachine(), ArgLocs, *DAG.getContext());
2724 CCInfo.AnalyzeCallOperands(Outs, CC_X86);
2725 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i)
2726 if (!ArgLocs[i].isRegLoc())
2730 // If the call result is in ST0 / ST1, it needs to be popped off the x87
2731 // stack. Therefore, if it's not used by the call it is not safe to optimize
2732 // this into a sibcall.
2733 bool Unused = false;
2734 for (unsigned i = 0, e = Ins.size(); i != e; ++i) {
2741 SmallVector<CCValAssign, 16> RVLocs;
2742 CCState CCInfo(CalleeCC, false, DAG.getMachineFunction(),
2743 getTargetMachine(), RVLocs, *DAG.getContext());
2744 CCInfo.AnalyzeCallResult(Ins, RetCC_X86);
2745 for (unsigned i = 0, e = RVLocs.size(); i != e; ++i) {
2746 CCValAssign &VA = RVLocs[i];
2747 if (VA.getLocReg() == X86::ST0 || VA.getLocReg() == X86::ST1)
2752 // If the calling conventions do not match, then we'd better make sure the
2753 // results are returned in the same way as what the caller expects.
2755 SmallVector<CCValAssign, 16> RVLocs1;
2756 CCState CCInfo1(CalleeCC, false, DAG.getMachineFunction(),
2757 getTargetMachine(), RVLocs1, *DAG.getContext());
2758 CCInfo1.AnalyzeCallResult(Ins, RetCC_X86);
2760 SmallVector<CCValAssign, 16> RVLocs2;
2761 CCState CCInfo2(CallerCC, false, DAG.getMachineFunction(),
2762 getTargetMachine(), RVLocs2, *DAG.getContext());
2763 CCInfo2.AnalyzeCallResult(Ins, RetCC_X86);
2765 if (RVLocs1.size() != RVLocs2.size())
2767 for (unsigned i = 0, e = RVLocs1.size(); i != e; ++i) {
2768 if (RVLocs1[i].isRegLoc() != RVLocs2[i].isRegLoc())
2770 if (RVLocs1[i].getLocInfo() != RVLocs2[i].getLocInfo())
2772 if (RVLocs1[i].isRegLoc()) {
2773 if (RVLocs1[i].getLocReg() != RVLocs2[i].getLocReg())
2776 if (RVLocs1[i].getLocMemOffset() != RVLocs2[i].getLocMemOffset())
2782 // If the callee takes no arguments then go on to check the results of the
2784 if (!Outs.empty()) {
2785 // Check if stack adjustment is needed. For now, do not do this if any
2786 // argument is passed on the stack.
2787 SmallVector<CCValAssign, 16> ArgLocs;
2788 CCState CCInfo(CalleeCC, isVarArg, DAG.getMachineFunction(),
2789 getTargetMachine(), ArgLocs, *DAG.getContext());
2791 // Allocate shadow area for Win64
2792 if (Subtarget->isTargetWin64()) {
2793 CCInfo.AllocateStack(32, 8);
2796 CCInfo.AnalyzeCallOperands(Outs, CC_X86);
2797 if (CCInfo.getNextStackOffset()) {
2798 MachineFunction &MF = DAG.getMachineFunction();
2799 if (MF.getInfo<X86MachineFunctionInfo>()->getBytesToPopOnReturn())
2802 // Check if the arguments are already laid out in the right way as
2803 // the caller's fixed stack objects.
2804 MachineFrameInfo *MFI = MF.getFrameInfo();
2805 const MachineRegisterInfo *MRI = &MF.getRegInfo();
2806 const X86InstrInfo *TII =
2807 ((X86TargetMachine&)getTargetMachine()).getInstrInfo();
2808 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2809 CCValAssign &VA = ArgLocs[i];
2810 SDValue Arg = OutVals[i];
2811 ISD::ArgFlagsTy Flags = Outs[i].Flags;
2812 if (VA.getLocInfo() == CCValAssign::Indirect)
2814 if (!VA.isRegLoc()) {
2815 if (!MatchingStackOffset(Arg, VA.getLocMemOffset(), Flags,
2822 // If the tailcall address may be in a register, then make sure it's
2823 // possible to register allocate for it. In 32-bit, the call address can
2824 // only target EAX, EDX, or ECX since the tail call must be scheduled after
2825 // callee-saved registers are restored. These happen to be the same
2826 // registers used to pass 'inreg' arguments so watch out for those.
2827 if (!Subtarget->is64Bit() &&
2828 !isa<GlobalAddressSDNode>(Callee) &&
2829 !isa<ExternalSymbolSDNode>(Callee)) {
2830 unsigned NumInRegs = 0;
2831 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2832 CCValAssign &VA = ArgLocs[i];
2835 unsigned Reg = VA.getLocReg();
2838 case X86::EAX: case X86::EDX: case X86::ECX:
2839 if (++NumInRegs == 3)
2851 X86TargetLowering::createFastISel(FunctionLoweringInfo &funcInfo) const {
2852 return X86::createFastISel(funcInfo);
2856 //===----------------------------------------------------------------------===//
2857 // Other Lowering Hooks
2858 //===----------------------------------------------------------------------===//
2860 static bool MayFoldLoad(SDValue Op) {
2861 return Op.hasOneUse() && ISD::isNormalLoad(Op.getNode());
2864 static bool MayFoldIntoStore(SDValue Op) {
2865 return Op.hasOneUse() && ISD::isNormalStore(*Op.getNode()->use_begin());
2868 static bool isTargetShuffle(unsigned Opcode) {
2870 default: return false;
2871 case X86ISD::PSHUFD:
2872 case X86ISD::PSHUFHW:
2873 case X86ISD::PSHUFLW:
2875 case X86ISD::PALIGN:
2876 case X86ISD::MOVLHPS:
2877 case X86ISD::MOVLHPD:
2878 case X86ISD::MOVHLPS:
2879 case X86ISD::MOVLPS:
2880 case X86ISD::MOVLPD:
2881 case X86ISD::MOVSHDUP:
2882 case X86ISD::MOVSLDUP:
2883 case X86ISD::MOVDDUP:
2886 case X86ISD::UNPCKL:
2887 case X86ISD::UNPCKH:
2888 case X86ISD::VPERMILP:
2889 case X86ISD::VPERM2X128:
2895 static SDValue getTargetShuffleNode(unsigned Opc, DebugLoc dl, EVT VT,
2896 SDValue V1, SelectionDAG &DAG) {
2898 default: llvm_unreachable("Unknown x86 shuffle node");
2899 case X86ISD::MOVSHDUP:
2900 case X86ISD::MOVSLDUP:
2901 case X86ISD::MOVDDUP:
2902 return DAG.getNode(Opc, dl, VT, V1);
2908 static SDValue getTargetShuffleNode(unsigned Opc, DebugLoc dl, EVT VT,
2909 SDValue V1, unsigned TargetMask, SelectionDAG &DAG) {
2911 default: llvm_unreachable("Unknown x86 shuffle node");
2912 case X86ISD::PSHUFD:
2913 case X86ISD::PSHUFHW:
2914 case X86ISD::PSHUFLW:
2915 case X86ISD::VPERMILP:
2916 return DAG.getNode(Opc, dl, VT, V1, DAG.getConstant(TargetMask, MVT::i8));
2922 static SDValue getTargetShuffleNode(unsigned Opc, DebugLoc dl, EVT VT,
2923 SDValue V1, SDValue V2, unsigned TargetMask, SelectionDAG &DAG) {
2925 default: llvm_unreachable("Unknown x86 shuffle node");
2926 case X86ISD::PALIGN:
2928 case X86ISD::VPERM2X128:
2929 return DAG.getNode(Opc, dl, VT, V1, V2,
2930 DAG.getConstant(TargetMask, MVT::i8));
2935 static SDValue getTargetShuffleNode(unsigned Opc, DebugLoc dl, EVT VT,
2936 SDValue V1, SDValue V2, SelectionDAG &DAG) {
2938 default: llvm_unreachable("Unknown x86 shuffle node");
2939 case X86ISD::MOVLHPS:
2940 case X86ISD::MOVLHPD:
2941 case X86ISD::MOVHLPS:
2942 case X86ISD::MOVLPS:
2943 case X86ISD::MOVLPD:
2946 case X86ISD::UNPCKL:
2947 case X86ISD::UNPCKH:
2948 return DAG.getNode(Opc, dl, VT, V1, V2);
2953 SDValue X86TargetLowering::getReturnAddressFrameIndex(SelectionDAG &DAG) const {
2954 MachineFunction &MF = DAG.getMachineFunction();
2955 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
2956 int ReturnAddrIndex = FuncInfo->getRAIndex();
2958 if (ReturnAddrIndex == 0) {
2959 // Set up a frame object for the return address.
2960 uint64_t SlotSize = TD->getPointerSize();
2961 ReturnAddrIndex = MF.getFrameInfo()->CreateFixedObject(SlotSize, -SlotSize,
2963 FuncInfo->setRAIndex(ReturnAddrIndex);
2966 return DAG.getFrameIndex(ReturnAddrIndex, getPointerTy());
2970 bool X86::isOffsetSuitableForCodeModel(int64_t Offset, CodeModel::Model M,
2971 bool hasSymbolicDisplacement) {
2972 // Offset should fit into 32 bit immediate field.
2973 if (!isInt<32>(Offset))
2976 // If we don't have a symbolic displacement - we don't have any extra
2978 if (!hasSymbolicDisplacement)
2981 // FIXME: Some tweaks might be needed for medium code model.
2982 if (M != CodeModel::Small && M != CodeModel::Kernel)
2985 // For small code model we assume that latest object is 16MB before end of 31
2986 // bits boundary. We may also accept pretty large negative constants knowing
2987 // that all objects are in the positive half of address space.
2988 if (M == CodeModel::Small && Offset < 16*1024*1024)
2991 // For kernel code model we know that all object resist in the negative half
2992 // of 32bits address space. We may not accept negative offsets, since they may
2993 // be just off and we may accept pretty large positive ones.
2994 if (M == CodeModel::Kernel && Offset > 0)
3000 /// isCalleePop - Determines whether the callee is required to pop its
3001 /// own arguments. Callee pop is necessary to support tail calls.
3002 bool X86::isCalleePop(CallingConv::ID CallingConv,
3003 bool is64Bit, bool IsVarArg, bool TailCallOpt) {
3007 switch (CallingConv) {
3010 case CallingConv::X86_StdCall:
3012 case CallingConv::X86_FastCall:
3014 case CallingConv::X86_ThisCall:
3016 case CallingConv::Fast:
3018 case CallingConv::GHC:
3023 /// TranslateX86CC - do a one to one translation of a ISD::CondCode to the X86
3024 /// specific condition code, returning the condition code and the LHS/RHS of the
3025 /// comparison to make.
3026 static unsigned TranslateX86CC(ISD::CondCode SetCCOpcode, bool isFP,
3027 SDValue &LHS, SDValue &RHS, SelectionDAG &DAG) {
3029 if (ConstantSDNode *RHSC = dyn_cast<ConstantSDNode>(RHS)) {
3030 if (SetCCOpcode == ISD::SETGT && RHSC->isAllOnesValue()) {
3031 // X > -1 -> X == 0, jump !sign.
3032 RHS = DAG.getConstant(0, RHS.getValueType());
3033 return X86::COND_NS;
3034 } else if (SetCCOpcode == ISD::SETLT && RHSC->isNullValue()) {
3035 // X < 0 -> X == 0, jump on sign.
3037 } else if (SetCCOpcode == ISD::SETLT && RHSC->getZExtValue() == 1) {
3039 RHS = DAG.getConstant(0, RHS.getValueType());
3040 return X86::COND_LE;
3044 switch (SetCCOpcode) {
3045 default: llvm_unreachable("Invalid integer condition!");
3046 case ISD::SETEQ: return X86::COND_E;
3047 case ISD::SETGT: return X86::COND_G;
3048 case ISD::SETGE: return X86::COND_GE;
3049 case ISD::SETLT: return X86::COND_L;
3050 case ISD::SETLE: return X86::COND_LE;
3051 case ISD::SETNE: return X86::COND_NE;
3052 case ISD::SETULT: return X86::COND_B;
3053 case ISD::SETUGT: return X86::COND_A;
3054 case ISD::SETULE: return X86::COND_BE;
3055 case ISD::SETUGE: return X86::COND_AE;
3059 // First determine if it is required or is profitable to flip the operands.
3061 // If LHS is a foldable load, but RHS is not, flip the condition.
3062 if (ISD::isNON_EXTLoad(LHS.getNode()) &&
3063 !ISD::isNON_EXTLoad(RHS.getNode())) {
3064 SetCCOpcode = getSetCCSwappedOperands(SetCCOpcode);
3065 std::swap(LHS, RHS);
3068 switch (SetCCOpcode) {
3074 std::swap(LHS, RHS);
3078 // On a floating point condition, the flags are set as follows:
3080 // 0 | 0 | 0 | X > Y
3081 // 0 | 0 | 1 | X < Y
3082 // 1 | 0 | 0 | X == Y
3083 // 1 | 1 | 1 | unordered
3084 switch (SetCCOpcode) {
3085 default: llvm_unreachable("Condcode should be pre-legalized away");
3087 case ISD::SETEQ: return X86::COND_E;
3088 case ISD::SETOLT: // flipped
3090 case ISD::SETGT: return X86::COND_A;
3091 case ISD::SETOLE: // flipped
3093 case ISD::SETGE: return X86::COND_AE;
3094 case ISD::SETUGT: // flipped
3096 case ISD::SETLT: return X86::COND_B;
3097 case ISD::SETUGE: // flipped
3099 case ISD::SETLE: return X86::COND_BE;
3101 case ISD::SETNE: return X86::COND_NE;
3102 case ISD::SETUO: return X86::COND_P;
3103 case ISD::SETO: return X86::COND_NP;
3105 case ISD::SETUNE: return X86::COND_INVALID;
3109 /// hasFPCMov - is there a floating point cmov for the specific X86 condition
3110 /// code. Current x86 isa includes the following FP cmov instructions:
3111 /// fcmovb, fcomvbe, fcomve, fcmovu, fcmovae, fcmova, fcmovne, fcmovnu.
3112 static bool hasFPCMov(unsigned X86CC) {
3128 /// isFPImmLegal - Returns true if the target can instruction select the
3129 /// specified FP immediate natively. If false, the legalizer will
3130 /// materialize the FP immediate as a load from a constant pool.
3131 bool X86TargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT) const {
3132 for (unsigned i = 0, e = LegalFPImmediates.size(); i != e; ++i) {
3133 if (Imm.bitwiseIsEqual(LegalFPImmediates[i]))
3139 /// isUndefOrInRange - Return true if Val is undef or if its value falls within
3140 /// the specified range (L, H].
3141 static bool isUndefOrInRange(int Val, int Low, int Hi) {
3142 return (Val < 0) || (Val >= Low && Val < Hi);
3145 /// isUndefOrInRange - Return true if every element in Mask, begining
3146 /// from position Pos and ending in Pos+Size, falls within the specified
3147 /// range (L, L+Pos]. or is undef.
3148 static bool isUndefOrInRange(ArrayRef<int> Mask,
3149 int Pos, int Size, int Low, int Hi) {
3150 for (int i = Pos, e = Pos+Size; i != e; ++i)
3151 if (!isUndefOrInRange(Mask[i], Low, Hi))
3156 /// isUndefOrEqual - Val is either less than zero (undef) or equal to the
3157 /// specified value.
3158 static bool isUndefOrEqual(int Val, int CmpVal) {
3159 if (Val < 0 || Val == CmpVal)
3164 /// isSequentialOrUndefInRange - Return true if every element in Mask, begining
3165 /// from position Pos and ending in Pos+Size, falls within the specified
3166 /// sequential range (L, L+Pos]. or is undef.
3167 static bool isSequentialOrUndefInRange(ArrayRef<int> Mask,
3168 int Pos, int Size, int Low) {
3169 for (int i = Pos, e = Pos+Size; i != e; ++i, ++Low)
3170 if (!isUndefOrEqual(Mask[i], Low))
3175 /// isPSHUFDMask - Return true if the node specifies a shuffle of elements that
3176 /// is suitable for input to PSHUFD or PSHUFW. That is, it doesn't reference
3177 /// the second operand.
3178 static bool isPSHUFDMask(ArrayRef<int> Mask, EVT VT) {
3179 if (VT == MVT::v4f32 || VT == MVT::v4i32 )
3180 return (Mask[0] < 4 && Mask[1] < 4 && Mask[2] < 4 && Mask[3] < 4);
3181 if (VT == MVT::v2f64 || VT == MVT::v2i64)
3182 return (Mask[0] < 2 && Mask[1] < 2);
3186 bool X86::isPSHUFDMask(ShuffleVectorSDNode *N) {
3187 return ::isPSHUFDMask(N->getMask(), N->getValueType(0));
3190 /// isPSHUFHWMask - Return true if the node specifies a shuffle of elements that
3191 /// is suitable for input to PSHUFHW.
3192 static bool isPSHUFHWMask(ArrayRef<int> Mask, EVT VT) {
3193 if (VT != MVT::v8i16)
3196 // Lower quadword copied in order or undef.
3197 if (!isSequentialOrUndefInRange(Mask, 0, 4, 0))
3200 // Upper quadword shuffled.
3201 for (unsigned i = 4; i != 8; ++i)
3202 if (Mask[i] >= 0 && (Mask[i] < 4 || Mask[i] > 7))
3208 bool X86::isPSHUFHWMask(ShuffleVectorSDNode *N) {
3209 return ::isPSHUFHWMask(N->getMask(), N->getValueType(0));
3212 /// isPSHUFLWMask - Return true if the node specifies a shuffle of elements that
3213 /// is suitable for input to PSHUFLW.
3214 static bool isPSHUFLWMask(ArrayRef<int> Mask, EVT VT) {
3215 if (VT != MVT::v8i16)
3218 // Upper quadword copied in order.
3219 if (!isSequentialOrUndefInRange(Mask, 4, 4, 4))
3222 // Lower quadword shuffled.
3223 for (unsigned i = 0; i != 4; ++i)
3230 bool X86::isPSHUFLWMask(ShuffleVectorSDNode *N) {
3231 return ::isPSHUFLWMask(N->getMask(), N->getValueType(0));
3234 /// isPALIGNRMask - Return true if the node specifies a shuffle of elements that
3235 /// is suitable for input to PALIGNR.
3236 static bool isPALIGNRMask(ArrayRef<int> Mask, EVT VT, bool hasSSSE3) {
3237 int i, e = VT.getVectorNumElements();
3238 if (VT.getSizeInBits() != 128)
3241 // Do not handle v2i64 / v2f64 shuffles with palignr.
3242 if (e < 4 || !hasSSSE3)
3245 for (i = 0; i != e; ++i)
3249 // All undef, not a palignr.
3253 // Make sure we're shifting in the right direction.
3257 int s = Mask[i] - i;
3259 // Check the rest of the elements to see if they are consecutive.
3260 for (++i; i != e; ++i) {
3262 if (m >= 0 && m != s+i)
3268 /// isVSHUFPYMask - Return true if the specified VECTOR_SHUFFLE operand
3269 /// specifies a shuffle of elements that is suitable for input to 256-bit
3271 static bool isVSHUFPYMask(ArrayRef<int> Mask, EVT VT,
3272 bool HasAVX, bool Commuted = false) {
3273 int NumElems = VT.getVectorNumElements();
3275 if (!HasAVX || VT.getSizeInBits() != 256)
3278 if (NumElems != 4 && NumElems != 8)
3281 // VSHUFPSY divides the resulting vector into 4 chunks.
3282 // The sources are also splitted into 4 chunks, and each destination
3283 // chunk must come from a different source chunk.
3285 // SRC1 => X7 X6 X5 X4 X3 X2 X1 X0
3286 // SRC2 => Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y9
3288 // DST => Y7..Y4, Y7..Y4, X7..X4, X7..X4,
3289 // Y3..Y0, Y3..Y0, X3..X0, X3..X0
3291 // VSHUFPDY divides the resulting vector into 4 chunks.
3292 // The sources are also splitted into 4 chunks, and each destination
3293 // chunk must come from a different source chunk.
3295 // SRC1 => X3 X2 X1 X0
3296 // SRC2 => Y3 Y2 Y1 Y0
3298 // DST => Y3..Y2, X3..X2, Y1..Y0, X1..X0
3300 unsigned QuarterSize = NumElems/4;
3301 unsigned HalfSize = QuarterSize*2;
3302 for (unsigned l = 0; l != 2; ++l) {
3303 unsigned LaneStart = l*HalfSize;
3304 for (unsigned s = 0; s != 2; ++s) {
3305 unsigned QuarterStart = s*QuarterSize;
3306 unsigned Src = (Commuted) ? (1-s) : s;
3307 unsigned SrcStart = Src*NumElems + LaneStart;
3308 for (unsigned i = 0; i != QuarterSize; ++i) {
3309 int Idx = Mask[i+QuarterStart+LaneStart];
3310 if (!isUndefOrInRange(Idx, SrcStart, SrcStart+HalfSize))
3312 // For VSHUFPSY, the mask of the second half must be the same as the
3313 // first but with the appropriate offsets. This works in the same way as
3314 // VPERMILPS works with masks.
3315 if (NumElems == 4 || l == 0 || Mask[i+QuarterStart] < 0)
3317 if (!isUndefOrEqual(Idx, Mask[i+QuarterStart]+LaneStart))
3326 /// getShuffleVSHUFPYImmediate - Return the appropriate immediate to shuffle
3327 /// the specified VECTOR_MASK mask with VSHUFPSY/VSHUFPDY instructions.
3328 static unsigned getShuffleVSHUFPYImmediate(ShuffleVectorSDNode *SVOp) {
3329 EVT VT = SVOp->getValueType(0);
3330 unsigned NumElems = VT.getVectorNumElements();
3332 assert(VT.getSizeInBits() == 256 && "Only supports 256-bit types");
3333 assert((NumElems == 4 || NumElems == 8) && "Only supports v4 and v8 types");
3335 unsigned HalfSize = NumElems/2;
3336 unsigned Mul = (NumElems == 8) ? 2 : 1;
3338 for (unsigned i = 0; i != NumElems; ++i) {
3339 int Elt = SVOp->getMaskElt(i);
3344 // For VSHUFPSY, the mask of the first half must be equal to the second one.
3345 if (NumElems == 8) Shamt %= HalfSize;
3346 Mask |= Elt << (Shamt*Mul);
3352 /// CommuteVectorShuffleMask - Change values in a shuffle permute mask assuming
3353 /// the two vector operands have swapped position.
3354 static void CommuteVectorShuffleMask(SmallVectorImpl<int> &Mask,
3355 unsigned NumElems) {
3356 for (unsigned i = 0; i != NumElems; ++i) {
3360 else if (idx < (int)NumElems)
3361 Mask[i] = idx + NumElems;
3363 Mask[i] = idx - NumElems;
3367 /// isSHUFPMask - Return true if the specified VECTOR_SHUFFLE operand
3368 /// specifies a shuffle of elements that is suitable for input to 128-bit
3369 /// SHUFPS and SHUFPD. If Commuted is true, then it checks for sources to be
3370 /// reverse of what x86 shuffles want.
3371 static bool isSHUFPMask(ArrayRef<int> Mask, EVT VT, bool Commuted = false) {
3372 unsigned NumElems = VT.getVectorNumElements();
3374 if (VT.getSizeInBits() != 128)
3377 if (NumElems != 2 && NumElems != 4)
3380 unsigned Half = NumElems / 2;
3381 unsigned SrcStart = Commuted ? NumElems : 0;
3382 for (unsigned i = 0; i != Half; ++i)
3383 if (!isUndefOrInRange(Mask[i], SrcStart, SrcStart+NumElems))
3385 SrcStart = Commuted ? 0 : NumElems;
3386 for (unsigned i = Half; i != NumElems; ++i)
3387 if (!isUndefOrInRange(Mask[i], SrcStart, SrcStart+NumElems))
3393 bool X86::isSHUFPMask(ShuffleVectorSDNode *N) {
3394 return ::isSHUFPMask(N->getMask(), N->getValueType(0));
3397 /// isMOVHLPSMask - Return true if the specified VECTOR_SHUFFLE operand
3398 /// specifies a shuffle of elements that is suitable for input to MOVHLPS.
3399 bool X86::isMOVHLPSMask(ShuffleVectorSDNode *N) {
3400 EVT VT = N->getValueType(0);
3401 unsigned NumElems = VT.getVectorNumElements();
3403 if (VT.getSizeInBits() != 128)
3409 // Expect bit0 == 6, bit1 == 7, bit2 == 2, bit3 == 3
3410 return isUndefOrEqual(N->getMaskElt(0), 6) &&
3411 isUndefOrEqual(N->getMaskElt(1), 7) &&
3412 isUndefOrEqual(N->getMaskElt(2), 2) &&
3413 isUndefOrEqual(N->getMaskElt(3), 3);
3416 /// isMOVHLPS_v_undef_Mask - Special case of isMOVHLPSMask for canonical form
3417 /// of vector_shuffle v, v, <2, 3, 2, 3>, i.e. vector_shuffle v, undef,
3419 bool X86::isMOVHLPS_v_undef_Mask(ShuffleVectorSDNode *N) {
3420 EVT VT = N->getValueType(0);
3421 unsigned NumElems = VT.getVectorNumElements();
3423 if (VT.getSizeInBits() != 128)
3429 return isUndefOrEqual(N->getMaskElt(0), 2) &&
3430 isUndefOrEqual(N->getMaskElt(1), 3) &&
3431 isUndefOrEqual(N->getMaskElt(2), 2) &&
3432 isUndefOrEqual(N->getMaskElt(3), 3);
3435 /// isMOVLPMask - Return true if the specified VECTOR_SHUFFLE operand
3436 /// specifies a shuffle of elements that is suitable for input to MOVLP{S|D}.
3437 bool X86::isMOVLPMask(ShuffleVectorSDNode *N) {
3438 EVT VT = N->getValueType(0);
3440 if (VT.getSizeInBits() != 128)
3443 unsigned NumElems = N->getValueType(0).getVectorNumElements();
3445 if (NumElems != 2 && NumElems != 4)
3448 for (unsigned i = 0; i < NumElems/2; ++i)
3449 if (!isUndefOrEqual(N->getMaskElt(i), i + NumElems))
3452 for (unsigned i = NumElems/2; i < NumElems; ++i)
3453 if (!isUndefOrEqual(N->getMaskElt(i), i))
3459 /// isMOVLHPSMask - Return true if the specified VECTOR_SHUFFLE operand
3460 /// specifies a shuffle of elements that is suitable for input to MOVLHPS.
3461 bool X86::isMOVLHPSMask(ShuffleVectorSDNode *N) {
3462 unsigned NumElems = N->getValueType(0).getVectorNumElements();
3464 if ((NumElems != 2 && NumElems != 4)
3465 || N->getValueType(0).getSizeInBits() > 128)
3468 for (unsigned i = 0; i < NumElems/2; ++i)
3469 if (!isUndefOrEqual(N->getMaskElt(i), i))
3472 for (unsigned i = 0; i < NumElems/2; ++i)
3473 if (!isUndefOrEqual(N->getMaskElt(i + NumElems/2), i + NumElems))
3479 /// isUNPCKLMask - Return true if the specified VECTOR_SHUFFLE operand
3480 /// specifies a shuffle of elements that is suitable for input to UNPCKL.
3481 static bool isUNPCKLMask(ArrayRef<int> Mask, EVT VT,
3482 bool HasAVX2, bool V2IsSplat = false) {
3483 unsigned NumElts = VT.getVectorNumElements();
3485 assert((VT.is128BitVector() || VT.is256BitVector()) &&
3486 "Unsupported vector type for unpckh");
3488 if (VT.getSizeInBits() == 256 && NumElts != 4 && NumElts != 8 &&
3489 (!HasAVX2 || (NumElts != 16 && NumElts != 32)))
3492 // Handle 128 and 256-bit vector lengths. AVX defines UNPCK* to operate
3493 // independently on 128-bit lanes.
3494 unsigned NumLanes = VT.getSizeInBits()/128;
3495 unsigned NumLaneElts = NumElts/NumLanes;
3497 for (unsigned l = 0; l != NumLanes; ++l) {
3498 for (unsigned i = l*NumLaneElts, j = l*NumLaneElts;
3499 i != (l+1)*NumLaneElts;
3502 int BitI1 = Mask[i+1];
3503 if (!isUndefOrEqual(BitI, j))
3506 if (!isUndefOrEqual(BitI1, NumElts))
3509 if (!isUndefOrEqual(BitI1, j + NumElts))
3518 bool X86::isUNPCKLMask(ShuffleVectorSDNode *N, bool HasAVX2, bool V2IsSplat) {
3519 return ::isUNPCKLMask(N->getMask(), N->getValueType(0), HasAVX2, V2IsSplat);
3522 /// isUNPCKHMask - Return true if the specified VECTOR_SHUFFLE operand
3523 /// specifies a shuffle of elements that is suitable for input to UNPCKH.
3524 static bool isUNPCKHMask(ArrayRef<int> Mask, EVT VT,
3525 bool HasAVX2, bool V2IsSplat = false) {
3526 unsigned NumElts = VT.getVectorNumElements();
3528 assert((VT.is128BitVector() || VT.is256BitVector()) &&
3529 "Unsupported vector type for unpckh");
3531 if (VT.getSizeInBits() == 256 && NumElts != 4 && NumElts != 8 &&
3532 (!HasAVX2 || (NumElts != 16 && NumElts != 32)))
3535 // Handle 128 and 256-bit vector lengths. AVX defines UNPCK* to operate
3536 // independently on 128-bit lanes.
3537 unsigned NumLanes = VT.getSizeInBits()/128;
3538 unsigned NumLaneElts = NumElts/NumLanes;
3540 for (unsigned l = 0; l != NumLanes; ++l) {
3541 for (unsigned i = l*NumLaneElts, j = (l*NumLaneElts)+NumLaneElts/2;
3542 i != (l+1)*NumLaneElts; i += 2, ++j) {
3544 int BitI1 = Mask[i+1];
3545 if (!isUndefOrEqual(BitI, j))
3548 if (isUndefOrEqual(BitI1, NumElts))
3551 if (!isUndefOrEqual(BitI1, j+NumElts))
3559 bool X86::isUNPCKHMask(ShuffleVectorSDNode *N, bool HasAVX2, bool V2IsSplat) {
3560 return ::isUNPCKHMask(N->getMask(), N->getValueType(0), HasAVX2, V2IsSplat);
3563 /// isUNPCKL_v_undef_Mask - Special case of isUNPCKLMask for canonical form
3564 /// of vector_shuffle v, v, <0, 4, 1, 5>, i.e. vector_shuffle v, undef,
3566 static bool isUNPCKL_v_undef_Mask(ArrayRef<int> Mask, EVT VT,
3568 unsigned NumElts = VT.getVectorNumElements();
3570 assert((VT.is128BitVector() || VT.is256BitVector()) &&
3571 "Unsupported vector type for unpckh");
3573 if (VT.getSizeInBits() == 256 && NumElts != 4 && NumElts != 8 &&
3574 (!HasAVX2 || (NumElts != 16 && NumElts != 32)))
3577 // For 256-bit i64/f64, use MOVDDUPY instead, so reject the matching pattern
3578 // FIXME: Need a better way to get rid of this, there's no latency difference
3579 // between UNPCKLPD and MOVDDUP, the later should always be checked first and
3580 // the former later. We should also remove the "_undef" special mask.
3581 if (NumElts == 4 && VT.getSizeInBits() == 256)
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;
3591 i != (l+1)*NumLaneElts;
3594 int BitI1 = Mask[i+1];
3596 if (!isUndefOrEqual(BitI, j))
3598 if (!isUndefOrEqual(BitI1, j))
3606 bool X86::isUNPCKL_v_undef_Mask(ShuffleVectorSDNode *N, bool HasAVX2) {
3607 return ::isUNPCKL_v_undef_Mask(N->getMask(), N->getValueType(0), HasAVX2);
3610 /// isUNPCKH_v_undef_Mask - Special case of isUNPCKHMask for canonical form
3611 /// of vector_shuffle v, v, <2, 6, 3, 7>, i.e. vector_shuffle v, undef,
3613 static bool isUNPCKH_v_undef_Mask(ArrayRef<int> Mask, EVT VT, bool HasAVX2) {
3614 unsigned NumElts = VT.getVectorNumElements();
3616 assert((VT.is128BitVector() || VT.is256BitVector()) &&
3617 "Unsupported vector type for unpckh");
3619 if (VT.getSizeInBits() == 256 && NumElts != 4 && NumElts != 8 &&
3620 (!HasAVX2 || (NumElts != 16 && NumElts != 32)))
3623 // Handle 128 and 256-bit vector lengths. AVX defines UNPCK* to operate
3624 // independently on 128-bit lanes.
3625 unsigned NumLanes = VT.getSizeInBits()/128;
3626 unsigned NumLaneElts = NumElts/NumLanes;
3628 for (unsigned l = 0; l != NumLanes; ++l) {
3629 for (unsigned i = l*NumLaneElts, j = (l*NumLaneElts)+NumLaneElts/2;
3630 i != (l+1)*NumLaneElts; i += 2, ++j) {
3632 int BitI1 = Mask[i+1];
3633 if (!isUndefOrEqual(BitI, j))
3635 if (!isUndefOrEqual(BitI1, j))
3642 bool X86::isUNPCKH_v_undef_Mask(ShuffleVectorSDNode *N, bool HasAVX2) {
3643 return ::isUNPCKH_v_undef_Mask(N->getMask(), N->getValueType(0), HasAVX2);
3646 /// isMOVLMask - Return true if the specified VECTOR_SHUFFLE operand
3647 /// specifies a shuffle of elements that is suitable for input to MOVSS,
3648 /// MOVSD, and MOVD, i.e. setting the lowest element.
3649 static bool isMOVLMask(ArrayRef<int> Mask, EVT VT) {
3650 if (VT.getVectorElementType().getSizeInBits() < 32)
3652 if (VT.getSizeInBits() == 256)
3655 unsigned NumElts = VT.getVectorNumElements();
3657 if (!isUndefOrEqual(Mask[0], NumElts))
3660 for (unsigned i = 1; i != NumElts; ++i)
3661 if (!isUndefOrEqual(Mask[i], i))
3667 bool X86::isMOVLMask(ShuffleVectorSDNode *N) {
3668 return ::isMOVLMask(N->getMask(), N->getValueType(0));
3671 /// isVPERM2X128Mask - Match 256-bit shuffles where the elements are considered
3672 /// as permutations between 128-bit chunks or halves. As an example: this
3674 /// vector_shuffle <4, 5, 6, 7, 12, 13, 14, 15>
3675 /// The first half comes from the second half of V1 and the second half from the
3676 /// the second half of V2.
3677 static bool isVPERM2X128Mask(ArrayRef<int> Mask, EVT VT, bool HasAVX) {
3678 if (!HasAVX || VT.getSizeInBits() != 256)
3681 // The shuffle result is divided into half A and half B. In total the two
3682 // sources have 4 halves, namely: C, D, E, F. The final values of A and
3683 // B must come from C, D, E or F.
3684 unsigned HalfSize = VT.getVectorNumElements()/2;
3685 bool MatchA = false, MatchB = false;
3687 // Check if A comes from one of C, D, E, F.
3688 for (unsigned Half = 0; Half != 4; ++Half) {
3689 if (isSequentialOrUndefInRange(Mask, 0, HalfSize, Half*HalfSize)) {
3695 // Check if B comes from one of C, D, E, F.
3696 for (unsigned Half = 0; Half != 4; ++Half) {
3697 if (isSequentialOrUndefInRange(Mask, HalfSize, HalfSize, Half*HalfSize)) {
3703 return MatchA && MatchB;
3706 /// getShuffleVPERM2X128Immediate - Return the appropriate immediate to shuffle
3707 /// the specified VECTOR_MASK mask with VPERM2F128/VPERM2I128 instructions.
3708 static unsigned getShuffleVPERM2X128Immediate(ShuffleVectorSDNode *SVOp) {
3709 EVT VT = SVOp->getValueType(0);
3711 unsigned HalfSize = VT.getVectorNumElements()/2;
3713 unsigned FstHalf = 0, SndHalf = 0;
3714 for (unsigned i = 0; i < HalfSize; ++i) {
3715 if (SVOp->getMaskElt(i) > 0) {
3716 FstHalf = SVOp->getMaskElt(i)/HalfSize;
3720 for (unsigned i = HalfSize; i < HalfSize*2; ++i) {
3721 if (SVOp->getMaskElt(i) > 0) {
3722 SndHalf = SVOp->getMaskElt(i)/HalfSize;
3727 return (FstHalf | (SndHalf << 4));
3730 /// isVPERMILPMask - Return true if the specified VECTOR_SHUFFLE operand
3731 /// specifies a shuffle of elements that is suitable for input to VPERMILPD*.
3732 /// Note that VPERMIL mask matching is different depending whether theunderlying
3733 /// type is 32 or 64. In the VPERMILPS the high half of the mask should point
3734 /// to the same elements of the low, but to the higher half of the source.
3735 /// In VPERMILPD the two lanes could be shuffled independently of each other
3736 /// with the same restriction that lanes can't be crossed.
3737 static bool isVPERMILPMask(ArrayRef<int> Mask, EVT VT, bool HasAVX) {
3741 unsigned NumElts = VT.getVectorNumElements();
3742 // Only match 256-bit with 32/64-bit types
3743 if (VT.getSizeInBits() != 256 || (NumElts != 4 && NumElts != 8))
3746 unsigned NumLanes = VT.getSizeInBits()/128;
3747 unsigned LaneSize = NumElts/NumLanes;
3748 for (unsigned l = 0; l != NumLanes; ++l) {
3749 unsigned LaneStart = l*LaneSize;
3750 for (unsigned i = 0; i != LaneSize; ++i) {
3751 if (!isUndefOrInRange(Mask[i+LaneStart], LaneStart, LaneStart+LaneSize))
3753 if (NumElts == 4 || l == 0)
3755 // VPERMILPS handling
3758 if (!isUndefOrEqual(Mask[i+LaneStart], Mask[i]+LaneStart))
3766 /// getShuffleVPERMILPImmediate - Return the appropriate immediate to shuffle
3767 /// the specified VECTOR_MASK mask with VPERMILPS/D* instructions.
3768 static unsigned getShuffleVPERMILPImmediate(ShuffleVectorSDNode *SVOp) {
3769 EVT VT = SVOp->getValueType(0);
3771 unsigned NumElts = VT.getVectorNumElements();
3772 unsigned NumLanes = VT.getSizeInBits()/128;
3773 unsigned LaneSize = NumElts/NumLanes;
3775 // Although the mask is equal for both lanes do it twice to get the cases
3776 // where a mask will match because the same mask element is undef on the
3777 // first half but valid on the second. This would get pathological cases
3778 // such as: shuffle <u, 0, 1, 2, 4, 4, 5, 6>, which is completely valid.
3779 unsigned Shift = (LaneSize == 4) ? 2 : 1;
3781 for (unsigned i = 0; i != NumElts; ++i) {
3782 int MaskElt = SVOp->getMaskElt(i);
3785 MaskElt %= LaneSize;
3787 // VPERMILPSY, the mask of the first half must be equal to the second one
3788 if (NumElts == 8) Shamt %= LaneSize;
3789 Mask |= MaskElt << (Shamt*Shift);
3795 /// isCommutedMOVL - Returns true if the shuffle mask is except the reverse
3796 /// of what x86 movss want. X86 movs requires the lowest element to be lowest
3797 /// element of vector 2 and the other elements to come from vector 1 in order.
3798 static bool isCommutedMOVLMask(ArrayRef<int> Mask, EVT VT,
3799 bool V2IsSplat = false, bool V2IsUndef = false) {
3800 unsigned NumOps = VT.getVectorNumElements();
3801 if (NumOps != 2 && NumOps != 4 && NumOps != 8 && NumOps != 16)
3804 if (!isUndefOrEqual(Mask[0], 0))
3807 for (unsigned i = 1; i != NumOps; ++i)
3808 if (!(isUndefOrEqual(Mask[i], i+NumOps) ||
3809 (V2IsUndef && isUndefOrInRange(Mask[i], NumOps, NumOps*2)) ||
3810 (V2IsSplat && isUndefOrEqual(Mask[i], NumOps))))
3816 static bool isCommutedMOVL(ShuffleVectorSDNode *N, bool V2IsSplat = false,
3817 bool V2IsUndef = false) {
3818 return isCommutedMOVLMask(N->getMask(), N->getValueType(0),
3819 V2IsSplat, V2IsUndef);
3822 /// isMOVSHDUPMask - Return true if the specified VECTOR_SHUFFLE operand
3823 /// specifies a shuffle of elements that is suitable for input to MOVSHDUP.
3824 /// Masks to match: <1, 1, 3, 3> or <1, 1, 3, 3, 5, 5, 7, 7>
3825 bool X86::isMOVSHDUPMask(ShuffleVectorSDNode *N,
3826 const X86Subtarget *Subtarget) {
3827 if (!Subtarget->hasSSE3())
3830 // The second vector must be undef
3831 if (N->getOperand(1).getOpcode() != ISD::UNDEF)
3834 EVT VT = N->getValueType(0);
3835 unsigned NumElems = VT.getVectorNumElements();
3837 if ((VT.getSizeInBits() == 128 && NumElems != 4) ||
3838 (VT.getSizeInBits() == 256 && NumElems != 8))
3841 // "i+1" is the value the indexed mask element must have
3842 for (unsigned i = 0; i < NumElems; i += 2)
3843 if (!isUndefOrEqual(N->getMaskElt(i), i+1) ||
3844 !isUndefOrEqual(N->getMaskElt(i+1), i+1))
3850 /// isMOVSLDUPMask - Return true if the specified VECTOR_SHUFFLE operand
3851 /// specifies a shuffle of elements that is suitable for input to MOVSLDUP.
3852 /// Masks to match: <0, 0, 2, 2> or <0, 0, 2, 2, 4, 4, 6, 6>
3853 bool X86::isMOVSLDUPMask(ShuffleVectorSDNode *N,
3854 const X86Subtarget *Subtarget) {
3855 if (!Subtarget->hasSSE3())
3858 // The second vector must be undef
3859 if (N->getOperand(1).getOpcode() != ISD::UNDEF)
3862 EVT VT = N->getValueType(0);
3863 unsigned NumElems = VT.getVectorNumElements();
3865 if ((VT.getSizeInBits() == 128 && NumElems != 4) ||
3866 (VT.getSizeInBits() == 256 && NumElems != 8))
3869 // "i" is the value the indexed mask element must have
3870 for (unsigned i = 0; i != NumElems; i += 2)
3871 if (!isUndefOrEqual(N->getMaskElt(i), i) ||
3872 !isUndefOrEqual(N->getMaskElt(i+1), i))
3878 /// isMOVDDUPYMask - Return true if the specified VECTOR_SHUFFLE operand
3879 /// specifies a shuffle of elements that is suitable for input to 256-bit
3880 /// version of MOVDDUP.
3881 static bool isMOVDDUPYMask(ArrayRef<int> Mask, EVT VT, bool HasAVX) {
3882 unsigned NumElts = VT.getVectorNumElements();
3884 if (!HasAVX || VT.getSizeInBits() != 256 || NumElts != 4)
3887 for (unsigned i = 0; i != NumElts/2; ++i)
3888 if (!isUndefOrEqual(Mask[i], 0))
3890 for (unsigned i = NumElts/2; i != NumElts; ++i)
3891 if (!isUndefOrEqual(Mask[i], NumElts/2))
3896 /// isMOVDDUPMask - Return true if the specified VECTOR_SHUFFLE operand
3897 /// specifies a shuffle of elements that is suitable for input to 128-bit
3898 /// version of MOVDDUP.
3899 bool X86::isMOVDDUPMask(ShuffleVectorSDNode *N) {
3900 EVT VT = N->getValueType(0);
3902 if (VT.getSizeInBits() != 128)
3905 unsigned e = VT.getVectorNumElements() / 2;
3906 for (unsigned i = 0; i != e; ++i)
3907 if (!isUndefOrEqual(N->getMaskElt(i), i))
3909 for (unsigned i = 0; i != e; ++i)
3910 if (!isUndefOrEqual(N->getMaskElt(e+i), i))
3915 /// isVEXTRACTF128Index - Return true if the specified
3916 /// EXTRACT_SUBVECTOR operand specifies a vector extract that is
3917 /// suitable for input to VEXTRACTF128.
3918 bool X86::isVEXTRACTF128Index(SDNode *N) {
3919 if (!isa<ConstantSDNode>(N->getOperand(1).getNode()))
3922 // The index should be aligned on a 128-bit boundary.
3924 cast<ConstantSDNode>(N->getOperand(1).getNode())->getZExtValue();
3926 unsigned VL = N->getValueType(0).getVectorNumElements();
3927 unsigned VBits = N->getValueType(0).getSizeInBits();
3928 unsigned ElSize = VBits / VL;
3929 bool Result = (Index * ElSize) % 128 == 0;
3934 /// isVINSERTF128Index - Return true if the specified INSERT_SUBVECTOR
3935 /// operand specifies a subvector insert that is suitable for input to
3937 bool X86::isVINSERTF128Index(SDNode *N) {
3938 if (!isa<ConstantSDNode>(N->getOperand(2).getNode()))
3941 // The index should be aligned on a 128-bit boundary.
3943 cast<ConstantSDNode>(N->getOperand(2).getNode())->getZExtValue();
3945 unsigned VL = N->getValueType(0).getVectorNumElements();
3946 unsigned VBits = N->getValueType(0).getSizeInBits();
3947 unsigned ElSize = VBits / VL;
3948 bool Result = (Index * ElSize) % 128 == 0;
3953 /// getShuffleSHUFImmediate - Return the appropriate immediate to shuffle
3954 /// the specified VECTOR_SHUFFLE mask with PSHUF* and SHUFP* instructions.
3955 unsigned X86::getShuffleSHUFImmediate(SDNode *N) {
3956 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);
3957 unsigned NumOperands = SVOp->getValueType(0).getVectorNumElements();
3959 unsigned Shift = (NumOperands == 4) ? 2 : 1;
3961 for (unsigned i = 0; i != NumOperands; ++i) {
3962 int Val = SVOp->getMaskElt(NumOperands-i-1);
3963 if (Val < 0) Val = 0;
3964 if (Val >= (int)NumOperands) Val -= NumOperands;
3966 if (i != NumOperands - 1)
3972 /// getShufflePSHUFHWImmediate - Return the appropriate immediate to shuffle
3973 /// the specified VECTOR_SHUFFLE mask with the PSHUFHW instruction.
3974 unsigned X86::getShufflePSHUFHWImmediate(SDNode *N) {
3975 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);
3977 // 8 nodes, but we only care about the last 4.
3978 for (unsigned i = 7; i >= 4; --i) {
3979 int Val = SVOp->getMaskElt(i);
3988 /// getShufflePSHUFLWImmediate - Return the appropriate immediate to shuffle
3989 /// the specified VECTOR_SHUFFLE mask with the PSHUFLW instruction.
3990 unsigned X86::getShufflePSHUFLWImmediate(SDNode *N) {
3991 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);
3993 // 8 nodes, but we only care about the first 4.
3994 for (int i = 3; i >= 0; --i) {
3995 int Val = SVOp->getMaskElt(i);
4004 /// getShufflePALIGNRImmediate - Return the appropriate immediate to shuffle
4005 /// the specified VECTOR_SHUFFLE mask with the PALIGNR instruction.
4006 static unsigned getShufflePALIGNRImmediate(ShuffleVectorSDNode *SVOp) {
4007 EVT VT = SVOp->getValueType(0);
4008 unsigned EltSize = VT.getVectorElementType().getSizeInBits() >> 3;
4012 for (i = 0, e = VT.getVectorNumElements(); i != e; ++i) {
4013 Val = SVOp->getMaskElt(i);
4017 assert(Val - i > 0 && "PALIGNR imm should be positive");
4018 return (Val - i) * EltSize;
4021 /// getExtractVEXTRACTF128Immediate - Return the appropriate immediate
4022 /// to extract the specified EXTRACT_SUBVECTOR index with VEXTRACTF128
4024 unsigned X86::getExtractVEXTRACTF128Immediate(SDNode *N) {
4025 if (!isa<ConstantSDNode>(N->getOperand(1).getNode()))
4026 llvm_unreachable("Illegal extract subvector for VEXTRACTF128");
4029 cast<ConstantSDNode>(N->getOperand(1).getNode())->getZExtValue();
4031 EVT VecVT = N->getOperand(0).getValueType();
4032 EVT ElVT = VecVT.getVectorElementType();
4034 unsigned NumElemsPerChunk = 128 / ElVT.getSizeInBits();
4035 return Index / NumElemsPerChunk;
4038 /// getInsertVINSERTF128Immediate - Return the appropriate immediate
4039 /// to insert at the specified INSERT_SUBVECTOR index with VINSERTF128
4041 unsigned X86::getInsertVINSERTF128Immediate(SDNode *N) {
4042 if (!isa<ConstantSDNode>(N->getOperand(2).getNode()))
4043 llvm_unreachable("Illegal insert subvector for VINSERTF128");
4046 cast<ConstantSDNode>(N->getOperand(2).getNode())->getZExtValue();
4048 EVT VecVT = N->getValueType(0);
4049 EVT ElVT = VecVT.getVectorElementType();
4051 unsigned NumElemsPerChunk = 128 / ElVT.getSizeInBits();
4052 return Index / NumElemsPerChunk;
4055 /// isZeroNode - Returns true if Elt is a constant zero or a floating point
4057 bool X86::isZeroNode(SDValue Elt) {
4058 return ((isa<ConstantSDNode>(Elt) &&
4059 cast<ConstantSDNode>(Elt)->isNullValue()) ||
4060 (isa<ConstantFPSDNode>(Elt) &&
4061 cast<ConstantFPSDNode>(Elt)->getValueAPF().isPosZero()));
4064 /// CommuteVectorShuffle - Swap vector_shuffle operands as well as values in
4065 /// their permute mask.
4066 static SDValue CommuteVectorShuffle(ShuffleVectorSDNode *SVOp,
4067 SelectionDAG &DAG) {
4068 EVT VT = SVOp->getValueType(0);
4069 unsigned NumElems = VT.getVectorNumElements();
4070 SmallVector<int, 8> MaskVec;
4072 for (unsigned i = 0; i != NumElems; ++i) {
4073 int idx = SVOp->getMaskElt(i);
4075 MaskVec.push_back(idx);
4076 else if (idx < (int)NumElems)
4077 MaskVec.push_back(idx + NumElems);
4079 MaskVec.push_back(idx - NumElems);
4081 return DAG.getVectorShuffle(VT, SVOp->getDebugLoc(), SVOp->getOperand(1),
4082 SVOp->getOperand(0), &MaskVec[0]);
4085 /// ShouldXformToMOVHLPS - Return true if the node should be transformed to
4086 /// match movhlps. The lower half elements should come from upper half of
4087 /// V1 (and in order), and the upper half elements should come from the upper
4088 /// half of V2 (and in order).
4089 static bool ShouldXformToMOVHLPS(ShuffleVectorSDNode *Op) {
4090 EVT VT = Op->getValueType(0);
4091 if (VT.getSizeInBits() != 128)
4093 if (VT.getVectorNumElements() != 4)
4095 for (unsigned i = 0, e = 2; i != e; ++i)
4096 if (!isUndefOrEqual(Op->getMaskElt(i), i+2))
4098 for (unsigned i = 2; i != 4; ++i)
4099 if (!isUndefOrEqual(Op->getMaskElt(i), i+4))
4104 /// isScalarLoadToVector - Returns true if the node is a scalar load that
4105 /// is promoted to a vector. It also returns the LoadSDNode by reference if
4107 static bool isScalarLoadToVector(SDNode *N, LoadSDNode **LD = NULL) {
4108 if (N->getOpcode() != ISD::SCALAR_TO_VECTOR)
4110 N = N->getOperand(0).getNode();
4111 if (!ISD::isNON_EXTLoad(N))
4114 *LD = cast<LoadSDNode>(N);
4118 // Test whether the given value is a vector value which will be legalized
4120 static bool WillBeConstantPoolLoad(SDNode *N) {
4121 if (N->getOpcode() != ISD::BUILD_VECTOR)
4124 // Check for any non-constant elements.
4125 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i)
4126 switch (N->getOperand(i).getNode()->getOpcode()) {
4128 case ISD::ConstantFP:
4135 // Vectors of all-zeros and all-ones are materialized with special
4136 // instructions rather than being loaded.
4137 return !ISD::isBuildVectorAllZeros(N) &&
4138 !ISD::isBuildVectorAllOnes(N);
4141 /// ShouldXformToMOVLP{S|D} - Return true if the node should be transformed to
4142 /// match movlp{s|d}. The lower half elements should come from lower half of
4143 /// V1 (and in order), and the upper half elements should come from the upper
4144 /// half of V2 (and in order). And since V1 will become the source of the
4145 /// MOVLP, it must be either a vector load or a scalar load to vector.
4146 static bool ShouldXformToMOVLP(SDNode *V1, SDNode *V2,
4147 ShuffleVectorSDNode *Op) {
4148 EVT VT = Op->getValueType(0);
4149 if (VT.getSizeInBits() != 128)
4152 if (!ISD::isNON_EXTLoad(V1) && !isScalarLoadToVector(V1))
4154 // Is V2 is a vector load, don't do this transformation. We will try to use
4155 // load folding shufps op.
4156 if (ISD::isNON_EXTLoad(V2) || WillBeConstantPoolLoad(V2))
4159 unsigned NumElems = VT.getVectorNumElements();
4161 if (NumElems != 2 && NumElems != 4)
4163 for (unsigned i = 0, e = NumElems/2; i != e; ++i)
4164 if (!isUndefOrEqual(Op->getMaskElt(i), i))
4166 for (unsigned i = NumElems/2; i != NumElems; ++i)
4167 if (!isUndefOrEqual(Op->getMaskElt(i), i+NumElems))
4172 /// isSplatVector - Returns true if N is a BUILD_VECTOR node whose elements are
4174 static bool isSplatVector(SDNode *N) {
4175 if (N->getOpcode() != ISD::BUILD_VECTOR)
4178 SDValue SplatValue = N->getOperand(0);
4179 for (unsigned i = 1, e = N->getNumOperands(); i != e; ++i)
4180 if (N->getOperand(i) != SplatValue)
4185 /// isZeroShuffle - Returns true if N is a VECTOR_SHUFFLE that can be resolved
4186 /// to an zero vector.
4187 /// FIXME: move to dag combiner / method on ShuffleVectorSDNode
4188 static bool isZeroShuffle(ShuffleVectorSDNode *N) {
4189 SDValue V1 = N->getOperand(0);
4190 SDValue V2 = N->getOperand(1);
4191 unsigned NumElems = N->getValueType(0).getVectorNumElements();
4192 for (unsigned i = 0; i != NumElems; ++i) {
4193 int Idx = N->getMaskElt(i);
4194 if (Idx >= (int)NumElems) {
4195 unsigned Opc = V2.getOpcode();
4196 if (Opc == ISD::UNDEF || ISD::isBuildVectorAllZeros(V2.getNode()))
4198 if (Opc != ISD::BUILD_VECTOR ||
4199 !X86::isZeroNode(V2.getOperand(Idx-NumElems)))
4201 } else if (Idx >= 0) {
4202 unsigned Opc = V1.getOpcode();
4203 if (Opc == ISD::UNDEF || ISD::isBuildVectorAllZeros(V1.getNode()))
4205 if (Opc != ISD::BUILD_VECTOR ||
4206 !X86::isZeroNode(V1.getOperand(Idx)))
4213 /// getZeroVector - Returns a vector of specified type with all zero elements.
4215 static SDValue getZeroVector(EVT VT, bool HasSSE2, bool HasAVX2,
4216 SelectionDAG &DAG, DebugLoc dl) {
4217 assert(VT.isVector() && "Expected a vector type");
4219 // Always build SSE zero vectors as <4 x i32> bitcasted
4220 // to their dest type. This ensures they get CSE'd.
4222 if (VT.getSizeInBits() == 128) { // SSE
4223 if (HasSSE2) { // SSE2
4224 SDValue Cst = DAG.getTargetConstant(0, MVT::i32);
4225 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, Cst, Cst, Cst, Cst);
4227 SDValue Cst = DAG.getTargetConstantFP(+0.0, MVT::f32);
4228 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4f32, Cst, Cst, Cst, Cst);
4230 } else if (VT.getSizeInBits() == 256) { // AVX
4231 if (HasAVX2) { // AVX2
4232 SDValue Cst = DAG.getTargetConstant(0, MVT::i32);
4233 SDValue Ops[] = { Cst, Cst, Cst, Cst, Cst, Cst, Cst, Cst };
4234 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v8i32, Ops, 8);
4236 // 256-bit logic and arithmetic instructions in AVX are all
4237 // floating-point, no support for integer ops. Emit fp zeroed vectors.
4238 SDValue Cst = DAG.getTargetConstantFP(+0.0, MVT::f32);
4239 SDValue Ops[] = { Cst, Cst, Cst, Cst, Cst, Cst, Cst, Cst };
4240 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v8f32, Ops, 8);
4243 return DAG.getNode(ISD::BITCAST, dl, VT, Vec);
4246 /// getOnesVector - Returns a vector of specified type with all bits set.
4247 /// Always build ones vectors as <4 x i32> or <8 x i32>. For 256-bit types with
4248 /// no AVX2 supprt, use two <4 x i32> inserted in a <8 x i32> appropriately.
4249 /// Then bitcast to their original type, ensuring they get CSE'd.
4250 static SDValue getOnesVector(EVT VT, bool HasAVX2, SelectionDAG &DAG,
4252 assert(VT.isVector() && "Expected a vector type");
4253 assert((VT.is128BitVector() || VT.is256BitVector())
4254 && "Expected a 128-bit or 256-bit vector type");
4256 SDValue Cst = DAG.getTargetConstant(~0U, MVT::i32);
4258 if (VT.getSizeInBits() == 256) {
4259 if (HasAVX2) { // AVX2
4260 SDValue Ops[] = { Cst, Cst, Cst, Cst, Cst, Cst, Cst, Cst };
4261 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v8i32, Ops, 8);
4263 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, Cst, Cst, Cst, Cst);
4264 SDValue InsV = Insert128BitVector(DAG.getNode(ISD::UNDEF, dl, MVT::v8i32),
4265 Vec, DAG.getConstant(0, MVT::i32), DAG, dl);
4266 Vec = Insert128BitVector(InsV, Vec,
4267 DAG.getConstant(4 /* NumElems/2 */, MVT::i32), DAG, dl);
4270 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, Cst, Cst, Cst, Cst);
4273 return DAG.getNode(ISD::BITCAST, dl, VT, Vec);
4276 /// NormalizeMask - V2 is a splat, modify the mask (if needed) so all elements
4277 /// that point to V2 points to its first element.
4278 static SDValue NormalizeMask(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG) {
4279 EVT VT = SVOp->getValueType(0);
4280 unsigned NumElems = VT.getVectorNumElements();
4282 bool Changed = false;
4283 SmallVector<int, 8> MaskVec(SVOp->getMask().begin(), SVOp->getMask().end());
4285 for (unsigned i = 0; i != NumElems; ++i) {
4286 if (MaskVec[i] > (int)NumElems) {
4287 MaskVec[i] = NumElems;
4292 return DAG.getVectorShuffle(VT, SVOp->getDebugLoc(), SVOp->getOperand(0),
4293 SVOp->getOperand(1), &MaskVec[0]);
4294 return SDValue(SVOp, 0);
4297 /// getMOVLMask - Returns a vector_shuffle mask for an movs{s|d}, movd
4298 /// operation of specified width.
4299 static SDValue getMOVL(SelectionDAG &DAG, DebugLoc dl, EVT VT, SDValue V1,
4301 unsigned NumElems = VT.getVectorNumElements();
4302 SmallVector<int, 8> Mask;
4303 Mask.push_back(NumElems);
4304 for (unsigned i = 1; i != NumElems; ++i)
4306 return DAG.getVectorShuffle(VT, dl, V1, V2, &Mask[0]);
4309 /// getUnpackl - Returns a vector_shuffle node for an unpackl operation.
4310 static SDValue getUnpackl(SelectionDAG &DAG, DebugLoc dl, EVT VT, SDValue V1,
4312 unsigned NumElems = VT.getVectorNumElements();
4313 SmallVector<int, 8> Mask;
4314 for (unsigned i = 0, e = NumElems/2; i != e; ++i) {
4316 Mask.push_back(i + NumElems);
4318 return DAG.getVectorShuffle(VT, dl, V1, V2, &Mask[0]);
4321 /// getUnpackh - Returns a vector_shuffle node for an unpackh operation.
4322 static SDValue getUnpackh(SelectionDAG &DAG, DebugLoc dl, EVT VT, SDValue V1,
4324 unsigned NumElems = VT.getVectorNumElements();
4325 unsigned Half = NumElems/2;
4326 SmallVector<int, 8> Mask;
4327 for (unsigned i = 0; i != Half; ++i) {
4328 Mask.push_back(i + Half);
4329 Mask.push_back(i + NumElems + Half);
4331 return DAG.getVectorShuffle(VT, dl, V1, V2, &Mask[0]);
4334 // PromoteSplati8i16 - All i16 and i8 vector types can't be used directly by
4335 // a generic shuffle instruction because the target has no such instructions.
4336 // Generate shuffles which repeat i16 and i8 several times until they can be
4337 // represented by v4f32 and then be manipulated by target suported shuffles.
4338 static SDValue PromoteSplati8i16(SDValue V, SelectionDAG &DAG, int &EltNo) {
4339 EVT VT = V.getValueType();
4340 int NumElems = VT.getVectorNumElements();
4341 DebugLoc dl = V.getDebugLoc();
4343 while (NumElems > 4) {
4344 if (EltNo < NumElems/2) {
4345 V = getUnpackl(DAG, dl, VT, V, V);
4347 V = getUnpackh(DAG, dl, VT, V, V);
4348 EltNo -= NumElems/2;
4355 /// getLegalSplat - Generate a legal splat with supported x86 shuffles
4356 static SDValue getLegalSplat(SelectionDAG &DAG, SDValue V, int EltNo) {
4357 EVT VT = V.getValueType();
4358 DebugLoc dl = V.getDebugLoc();
4359 assert((VT.getSizeInBits() == 128 || VT.getSizeInBits() == 256)
4360 && "Vector size not supported");
4362 if (VT.getSizeInBits() == 128) {
4363 V = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, V);
4364 int SplatMask[4] = { EltNo, EltNo, EltNo, EltNo };
4365 V = DAG.getVectorShuffle(MVT::v4f32, dl, V, DAG.getUNDEF(MVT::v4f32),
4368 // To use VPERMILPS to splat scalars, the second half of indicies must
4369 // refer to the higher part, which is a duplication of the lower one,
4370 // because VPERMILPS can only handle in-lane permutations.
4371 int SplatMask[8] = { EltNo, EltNo, EltNo, EltNo,
4372 EltNo+4, EltNo+4, EltNo+4, EltNo+4 };
4374 V = DAG.getNode(ISD::BITCAST, dl, MVT::v8f32, V);
4375 V = DAG.getVectorShuffle(MVT::v8f32, dl, V, DAG.getUNDEF(MVT::v8f32),
4379 return DAG.getNode(ISD::BITCAST, dl, VT, V);
4382 /// PromoteSplat - Splat is promoted to target supported vector shuffles.
4383 static SDValue PromoteSplat(ShuffleVectorSDNode *SV, SelectionDAG &DAG) {
4384 EVT SrcVT = SV->getValueType(0);
4385 SDValue V1 = SV->getOperand(0);
4386 DebugLoc dl = SV->getDebugLoc();
4388 int EltNo = SV->getSplatIndex();
4389 int NumElems = SrcVT.getVectorNumElements();
4390 unsigned Size = SrcVT.getSizeInBits();
4392 assert(((Size == 128 && NumElems > 4) || Size == 256) &&
4393 "Unknown how to promote splat for type");
4395 // Extract the 128-bit part containing the splat element and update
4396 // the splat element index when it refers to the higher register.
4398 unsigned Idx = (EltNo >= NumElems/2) ? NumElems/2 : 0;
4399 V1 = Extract128BitVector(V1, DAG.getConstant(Idx, MVT::i32), DAG, dl);
4401 EltNo -= NumElems/2;
4404 // All i16 and i8 vector types can't be used directly by a generic shuffle
4405 // instruction because the target has no such instruction. Generate shuffles
4406 // which repeat i16 and i8 several times until they fit in i32, and then can
4407 // be manipulated by target suported shuffles.
4408 EVT EltVT = SrcVT.getVectorElementType();
4409 if (EltVT == MVT::i8 || EltVT == MVT::i16)
4410 V1 = PromoteSplati8i16(V1, DAG, EltNo);
4412 // Recreate the 256-bit vector and place the same 128-bit vector
4413 // into the low and high part. This is necessary because we want
4414 // to use VPERM* to shuffle the vectors
4416 SDValue InsV = Insert128BitVector(DAG.getUNDEF(SrcVT), V1,
4417 DAG.getConstant(0, MVT::i32), DAG, dl);
4418 V1 = Insert128BitVector(InsV, V1,
4419 DAG.getConstant(NumElems/2, MVT::i32), DAG, dl);
4422 return getLegalSplat(DAG, V1, EltNo);
4425 /// getShuffleVectorZeroOrUndef - Return a vector_shuffle of the specified
4426 /// vector of zero or undef vector. This produces a shuffle where the low
4427 /// element of V2 is swizzled into the zero/undef vector, landing at element
4428 /// Idx. This produces a shuffle mask like 4,1,2,3 (idx=0) or 0,1,2,4 (idx=3).
4429 static SDValue getShuffleVectorZeroOrUndef(SDValue V2, unsigned Idx,
4431 const X86Subtarget *Subtarget,
4432 SelectionDAG &DAG) {
4433 EVT VT = V2.getValueType();
4435 ? getZeroVector(VT, Subtarget->hasSSE2(), Subtarget->hasAVX2(), DAG,
4436 V2.getDebugLoc()) : DAG.getUNDEF(VT);
4437 unsigned NumElems = VT.getVectorNumElements();
4438 SmallVector<int, 16> MaskVec;
4439 for (unsigned i = 0; i != NumElems; ++i)
4440 // If this is the insertion idx, put the low elt of V2 here.
4441 MaskVec.push_back(i == Idx ? NumElems : i);
4442 return DAG.getVectorShuffle(VT, V2.getDebugLoc(), V1, V2, &MaskVec[0]);
4445 /// getShuffleScalarElt - Returns the scalar element that will make up the ith
4446 /// element of the result of the vector shuffle.
4447 static SDValue getShuffleScalarElt(SDNode *N, int Index, SelectionDAG &DAG,
4450 return SDValue(); // Limit search depth.
4452 SDValue V = SDValue(N, 0);
4453 EVT VT = V.getValueType();
4454 unsigned Opcode = V.getOpcode();
4456 // Recurse into ISD::VECTOR_SHUFFLE node to find scalars.
4457 if (const ShuffleVectorSDNode *SV = dyn_cast<ShuffleVectorSDNode>(N)) {
4458 Index = SV->getMaskElt(Index);
4461 return DAG.getUNDEF(VT.getVectorElementType());
4463 int NumElems = VT.getVectorNumElements();
4464 SDValue NewV = (Index < NumElems) ? SV->getOperand(0) : SV->getOperand(1);
4465 return getShuffleScalarElt(NewV.getNode(), Index % NumElems, DAG, Depth+1);
4468 // Recurse into target specific vector shuffles to find scalars.
4469 if (isTargetShuffle(Opcode)) {
4470 int NumElems = VT.getVectorNumElements();
4471 SmallVector<unsigned, 16> ShuffleMask;
4476 ImmN = N->getOperand(N->getNumOperands()-1);
4477 DecodeSHUFPMask(VT, cast<ConstantSDNode>(ImmN)->getZExtValue(),
4480 case X86ISD::UNPCKH:
4481 DecodeUNPCKHMask(VT, ShuffleMask);
4483 case X86ISD::UNPCKL:
4484 DecodeUNPCKLMask(VT, ShuffleMask);
4486 case X86ISD::MOVHLPS:
4487 DecodeMOVHLPSMask(NumElems, ShuffleMask);
4489 case X86ISD::MOVLHPS:
4490 DecodeMOVLHPSMask(NumElems, ShuffleMask);
4492 case X86ISD::PSHUFD:
4493 ImmN = N->getOperand(N->getNumOperands()-1);
4494 DecodePSHUFMask(NumElems,
4495 cast<ConstantSDNode>(ImmN)->getZExtValue(),
4498 case X86ISD::PSHUFHW:
4499 ImmN = N->getOperand(N->getNumOperands()-1);
4500 DecodePSHUFHWMask(cast<ConstantSDNode>(ImmN)->getZExtValue(),
4503 case X86ISD::PSHUFLW:
4504 ImmN = N->getOperand(N->getNumOperands()-1);
4505 DecodePSHUFLWMask(cast<ConstantSDNode>(ImmN)->getZExtValue(),
4509 case X86ISD::MOVSD: {
4510 // The index 0 always comes from the first element of the second source,
4511 // this is why MOVSS and MOVSD are used in the first place. The other
4512 // elements come from the other positions of the first source vector.
4513 unsigned OpNum = (Index == 0) ? 1 : 0;
4514 return getShuffleScalarElt(V.getOperand(OpNum).getNode(), Index, DAG,
4517 case X86ISD::VPERMILP:
4518 ImmN = N->getOperand(N->getNumOperands()-1);
4519 DecodeVPERMILPMask(VT, cast<ConstantSDNode>(ImmN)->getZExtValue(),
4522 case X86ISD::VPERM2X128:
4523 ImmN = N->getOperand(N->getNumOperands()-1);
4524 DecodeVPERM2F128Mask(VT, cast<ConstantSDNode>(ImmN)->getZExtValue(),
4527 case X86ISD::MOVDDUP:
4528 case X86ISD::MOVLHPD:
4529 case X86ISD::MOVLPD:
4530 case X86ISD::MOVLPS:
4531 case X86ISD::MOVSHDUP:
4532 case X86ISD::MOVSLDUP:
4533 case X86ISD::PALIGN:
4534 return SDValue(); // Not yet implemented.
4536 assert(0 && "unknown target shuffle node");
4540 Index = ShuffleMask[Index];
4542 return DAG.getUNDEF(VT.getVectorElementType());
4544 SDValue NewV = (Index < NumElems) ? N->getOperand(0) : N->getOperand(1);
4545 return getShuffleScalarElt(NewV.getNode(), Index % NumElems, DAG,
4549 // Actual nodes that may contain scalar elements
4550 if (Opcode == ISD::BITCAST) {
4551 V = V.getOperand(0);
4552 EVT SrcVT = V.getValueType();
4553 unsigned NumElems = VT.getVectorNumElements();
4555 if (!SrcVT.isVector() || SrcVT.getVectorNumElements() != NumElems)
4559 if (V.getOpcode() == ISD::SCALAR_TO_VECTOR)
4560 return (Index == 0) ? V.getOperand(0)
4561 : DAG.getUNDEF(VT.getVectorElementType());
4563 if (V.getOpcode() == ISD::BUILD_VECTOR)
4564 return V.getOperand(Index);
4569 /// getNumOfConsecutiveZeros - Return the number of elements of a vector
4570 /// shuffle operation which come from a consecutively from a zero. The
4571 /// search can start in two different directions, from left or right.
4573 unsigned getNumOfConsecutiveZeros(SDNode *N, int NumElems,
4574 bool ZerosFromLeft, SelectionDAG &DAG) {
4577 while (i < NumElems) {
4578 unsigned Index = ZerosFromLeft ? i : NumElems-i-1;
4579 SDValue Elt = getShuffleScalarElt(N, Index, DAG, 0);
4580 if (!(Elt.getNode() &&
4581 (Elt.getOpcode() == ISD::UNDEF || X86::isZeroNode(Elt))))
4589 /// isShuffleMaskConsecutive - Check if the shuffle mask indicies from MaskI to
4590 /// MaskE correspond consecutively to elements from one of the vector operands,
4591 /// starting from its index OpIdx. Also tell OpNum which source vector operand.
4593 bool isShuffleMaskConsecutive(ShuffleVectorSDNode *SVOp, int MaskI, int MaskE,
4594 int OpIdx, int NumElems, unsigned &OpNum) {
4595 bool SeenV1 = false;
4596 bool SeenV2 = false;
4598 for (int i = MaskI; i <= MaskE; ++i, ++OpIdx) {
4599 int Idx = SVOp->getMaskElt(i);
4600 // Ignore undef indicies
4609 // Only accept consecutive elements from the same vector
4610 if ((Idx % NumElems != OpIdx) || (SeenV1 && SeenV2))
4614 OpNum = SeenV1 ? 0 : 1;
4618 /// isVectorShiftRight - Returns true if the shuffle can be implemented as a
4619 /// logical left shift of a vector.
4620 static bool isVectorShiftRight(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG,
4621 bool &isLeft, SDValue &ShVal, unsigned &ShAmt) {
4622 unsigned NumElems = SVOp->getValueType(0).getVectorNumElements();
4623 unsigned NumZeros = getNumOfConsecutiveZeros(SVOp, NumElems,
4624 false /* check zeros from right */, DAG);
4630 // Considering the elements in the mask that are not consecutive zeros,
4631 // check if they consecutively come from only one of the source vectors.
4633 // V1 = {X, A, B, C} 0
4635 // vector_shuffle V1, V2 <1, 2, 3, X>
4637 if (!isShuffleMaskConsecutive(SVOp,
4638 0, // Mask Start Index
4639 NumElems-NumZeros-1, // Mask End Index
4640 NumZeros, // Where to start looking in the src vector
4641 NumElems, // Number of elements in vector
4642 OpSrc)) // Which source operand ?
4647 ShVal = SVOp->getOperand(OpSrc);
4651 /// isVectorShiftLeft - Returns true if the shuffle can be implemented as a
4652 /// logical left shift of a vector.
4653 static bool isVectorShiftLeft(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG,
4654 bool &isLeft, SDValue &ShVal, unsigned &ShAmt) {
4655 unsigned NumElems = SVOp->getValueType(0).getVectorNumElements();
4656 unsigned NumZeros = getNumOfConsecutiveZeros(SVOp, NumElems,
4657 true /* check zeros from left */, DAG);
4663 // Considering the elements in the mask that are not consecutive zeros,
4664 // check if they consecutively come from only one of the source vectors.
4666 // 0 { A, B, X, X } = V2
4668 // vector_shuffle V1, V2 <X, X, 4, 5>
4670 if (!isShuffleMaskConsecutive(SVOp,
4671 NumZeros, // Mask Start Index
4672 NumElems-1, // Mask End Index
4673 0, // Where to start looking in the src vector
4674 NumElems, // Number of elements in vector
4675 OpSrc)) // Which source operand ?
4680 ShVal = SVOp->getOperand(OpSrc);
4684 /// isVectorShift - Returns true if the shuffle can be implemented as a
4685 /// logical left or right shift of a vector.
4686 static bool isVectorShift(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG,
4687 bool &isLeft, SDValue &ShVal, unsigned &ShAmt) {
4688 // Although the logic below support any bitwidth size, there are no
4689 // shift instructions which handle more than 128-bit vectors.
4690 if (SVOp->getValueType(0).getSizeInBits() > 128)
4693 if (isVectorShiftLeft(SVOp, DAG, isLeft, ShVal, ShAmt) ||
4694 isVectorShiftRight(SVOp, DAG, isLeft, ShVal, ShAmt))
4700 /// LowerBuildVectorv16i8 - Custom lower build_vector of v16i8.
4702 static SDValue LowerBuildVectorv16i8(SDValue Op, unsigned NonZeros,
4703 unsigned NumNonZero, unsigned NumZero,
4705 const TargetLowering &TLI) {
4709 DebugLoc dl = Op.getDebugLoc();
4712 for (unsigned i = 0; i < 16; ++i) {
4713 bool ThisIsNonZero = (NonZeros & (1 << i)) != 0;
4714 if (ThisIsNonZero && First) {
4716 V = getZeroVector(MVT::v8i16, /*HasSSE2*/ true, /*HasAVX2*/ false,
4719 V = DAG.getUNDEF(MVT::v8i16);
4724 SDValue ThisElt(0, 0), LastElt(0, 0);
4725 bool LastIsNonZero = (NonZeros & (1 << (i-1))) != 0;
4726 if (LastIsNonZero) {
4727 LastElt = DAG.getNode(ISD::ZERO_EXTEND, dl,
4728 MVT::i16, Op.getOperand(i-1));
4730 if (ThisIsNonZero) {
4731 ThisElt = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i16, Op.getOperand(i));
4732 ThisElt = DAG.getNode(ISD::SHL, dl, MVT::i16,
4733 ThisElt, DAG.getConstant(8, MVT::i8));
4735 ThisElt = DAG.getNode(ISD::OR, dl, MVT::i16, ThisElt, LastElt);
4739 if (ThisElt.getNode())
4740 V = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, V, ThisElt,
4741 DAG.getIntPtrConstant(i/2));
4745 return DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, V);
4748 /// LowerBuildVectorv8i16 - Custom lower build_vector of v8i16.
4750 static SDValue LowerBuildVectorv8i16(SDValue Op, unsigned NonZeros,
4751 unsigned NumNonZero, unsigned NumZero,
4753 const TargetLowering &TLI) {
4757 DebugLoc dl = Op.getDebugLoc();
4760 for (unsigned i = 0; i < 8; ++i) {
4761 bool isNonZero = (NonZeros & (1 << i)) != 0;
4765 V = getZeroVector(MVT::v8i16, /*HasSSE2*/ true, /*HasAVX2*/ false,
4768 V = DAG.getUNDEF(MVT::v8i16);
4771 V = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl,
4772 MVT::v8i16, V, Op.getOperand(i),
4773 DAG.getIntPtrConstant(i));
4780 /// getVShift - Return a vector logical shift node.
4782 static SDValue getVShift(bool isLeft, EVT VT, SDValue SrcOp,
4783 unsigned NumBits, SelectionDAG &DAG,
4784 const TargetLowering &TLI, DebugLoc dl) {
4785 assert(VT.getSizeInBits() == 128 && "Unknown type for VShift");
4786 EVT ShVT = MVT::v2i64;
4787 unsigned Opc = isLeft ? X86ISD::VSHL : X86ISD::VSRL;
4788 SrcOp = DAG.getNode(ISD::BITCAST, dl, ShVT, SrcOp);
4789 return DAG.getNode(ISD::BITCAST, dl, VT,
4790 DAG.getNode(Opc, dl, ShVT, SrcOp,
4791 DAG.getConstant(NumBits,
4792 TLI.getShiftAmountTy(SrcOp.getValueType()))));
4796 X86TargetLowering::LowerAsSplatVectorLoad(SDValue SrcOp, EVT VT, DebugLoc dl,
4797 SelectionDAG &DAG) const {
4799 // Check if the scalar load can be widened into a vector load. And if
4800 // the address is "base + cst" see if the cst can be "absorbed" into
4801 // the shuffle mask.
4802 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(SrcOp)) {
4803 SDValue Ptr = LD->getBasePtr();
4804 if (!ISD::isNormalLoad(LD) || LD->isVolatile())
4806 EVT PVT = LD->getValueType(0);
4807 if (PVT != MVT::i32 && PVT != MVT::f32)
4812 if (FrameIndexSDNode *FINode = dyn_cast<FrameIndexSDNode>(Ptr)) {
4813 FI = FINode->getIndex();
4815 } else if (DAG.isBaseWithConstantOffset(Ptr) &&
4816 isa<FrameIndexSDNode>(Ptr.getOperand(0))) {
4817 FI = cast<FrameIndexSDNode>(Ptr.getOperand(0))->getIndex();
4818 Offset = Ptr.getConstantOperandVal(1);
4819 Ptr = Ptr.getOperand(0);
4824 // FIXME: 256-bit vector instructions don't require a strict alignment,
4825 // improve this code to support it better.
4826 unsigned RequiredAlign = VT.getSizeInBits()/8;
4827 SDValue Chain = LD->getChain();
4828 // Make sure the stack object alignment is at least 16 or 32.
4829 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
4830 if (DAG.InferPtrAlignment(Ptr) < RequiredAlign) {
4831 if (MFI->isFixedObjectIndex(FI)) {
4832 // Can't change the alignment. FIXME: It's possible to compute
4833 // the exact stack offset and reference FI + adjust offset instead.
4834 // If someone *really* cares about this. That's the way to implement it.
4837 MFI->setObjectAlignment(FI, RequiredAlign);
4841 // (Offset % 16 or 32) must be multiple of 4. Then address is then
4842 // Ptr + (Offset & ~15).
4845 if ((Offset % RequiredAlign) & 3)
4847 int64_t StartOffset = Offset & ~(RequiredAlign-1);
4849 Ptr = DAG.getNode(ISD::ADD, Ptr.getDebugLoc(), Ptr.getValueType(),
4850 Ptr,DAG.getConstant(StartOffset, Ptr.getValueType()));
4852 int EltNo = (Offset - StartOffset) >> 2;
4853 int NumElems = VT.getVectorNumElements();
4855 EVT CanonVT = VT.getSizeInBits() == 128 ? MVT::v4i32 : MVT::v8i32;
4856 EVT NVT = EVT::getVectorVT(*DAG.getContext(), PVT, NumElems);
4857 SDValue V1 = DAG.getLoad(NVT, dl, Chain, Ptr,
4858 LD->getPointerInfo().getWithOffset(StartOffset),
4859 false, false, false, 0);
4861 // Canonicalize it to a v4i32 or v8i32 shuffle.
4862 SmallVector<int, 8> Mask;
4863 for (int i = 0; i < NumElems; ++i)
4864 Mask.push_back(EltNo);
4866 V1 = DAG.getNode(ISD::BITCAST, dl, CanonVT, V1);
4867 return DAG.getNode(ISD::BITCAST, dl, NVT,
4868 DAG.getVectorShuffle(CanonVT, dl, V1,
4869 DAG.getUNDEF(CanonVT),&Mask[0]));
4875 /// EltsFromConsecutiveLoads - Given the initializing elements 'Elts' of a
4876 /// vector of type 'VT', see if the elements can be replaced by a single large
4877 /// load which has the same value as a build_vector whose operands are 'elts'.
4879 /// Example: <load i32 *a, load i32 *a+4, undef, undef> -> zextload a
4881 /// FIXME: we'd also like to handle the case where the last elements are zero
4882 /// rather than undef via VZEXT_LOAD, but we do not detect that case today.
4883 /// There's even a handy isZeroNode for that purpose.
4884 static SDValue EltsFromConsecutiveLoads(EVT VT, SmallVectorImpl<SDValue> &Elts,
4885 DebugLoc &DL, SelectionDAG &DAG) {
4886 EVT EltVT = VT.getVectorElementType();
4887 unsigned NumElems = Elts.size();
4889 LoadSDNode *LDBase = NULL;
4890 unsigned LastLoadedElt = -1U;
4892 // For each element in the initializer, see if we've found a load or an undef.
4893 // If we don't find an initial load element, or later load elements are
4894 // non-consecutive, bail out.
4895 for (unsigned i = 0; i < NumElems; ++i) {
4896 SDValue Elt = Elts[i];
4898 if (!Elt.getNode() ||
4899 (Elt.getOpcode() != ISD::UNDEF && !ISD::isNON_EXTLoad(Elt.getNode())))
4902 if (Elt.getNode()->getOpcode() == ISD::UNDEF)
4904 LDBase = cast<LoadSDNode>(Elt.getNode());
4908 if (Elt.getOpcode() == ISD::UNDEF)
4911 LoadSDNode *LD = cast<LoadSDNode>(Elt);
4912 if (!DAG.isConsecutiveLoad(LD, LDBase, EltVT.getSizeInBits()/8, i))
4917 // If we have found an entire vector of loads and undefs, then return a large
4918 // load of the entire vector width starting at the base pointer. If we found
4919 // consecutive loads for the low half, generate a vzext_load node.
4920 if (LastLoadedElt == NumElems - 1) {
4921 if (DAG.InferPtrAlignment(LDBase->getBasePtr()) >= 16)
4922 return DAG.getLoad(VT, DL, LDBase->getChain(), LDBase->getBasePtr(),
4923 LDBase->getPointerInfo(),
4924 LDBase->isVolatile(), LDBase->isNonTemporal(),
4925 LDBase->isInvariant(), 0);
4926 return DAG.getLoad(VT, DL, LDBase->getChain(), LDBase->getBasePtr(),
4927 LDBase->getPointerInfo(),
4928 LDBase->isVolatile(), LDBase->isNonTemporal(),
4929 LDBase->isInvariant(), LDBase->getAlignment());
4930 } else if (NumElems == 4 && LastLoadedElt == 1 &&
4931 DAG.getTargetLoweringInfo().isTypeLegal(MVT::v2i64)) {
4932 SDVTList Tys = DAG.getVTList(MVT::v2i64, MVT::Other);
4933 SDValue Ops[] = { LDBase->getChain(), LDBase->getBasePtr() };
4935 DAG.getMemIntrinsicNode(X86ISD::VZEXT_LOAD, DL, Tys, Ops, 2, MVT::i64,
4936 LDBase->getPointerInfo(),
4937 LDBase->getAlignment(),
4938 false/*isVolatile*/, true/*ReadMem*/,
4940 return DAG.getNode(ISD::BITCAST, DL, VT, ResNode);
4945 /// isVectorBroadcast - Check if the node chain is suitable to be xformed to
4946 /// a vbroadcast node. We support two patterns:
4947 /// 1. A splat BUILD_VECTOR which uses a single scalar load.
4948 /// 2. A splat shuffle which uses a scalar_to_vector node which comes from
4950 /// The scalar load node is returned when a pattern is found,
4951 /// or SDValue() otherwise.
4952 static SDValue isVectorBroadcast(SDValue &Op, const X86Subtarget *Subtarget) {
4953 if (!Subtarget->hasAVX())
4956 EVT VT = Op.getValueType();
4959 if (V.hasOneUse() && V.getOpcode() == ISD::BITCAST)
4960 V = V.getOperand(0);
4962 //A suspected load to be broadcasted.
4965 switch (V.getOpcode()) {
4967 // Unknown pattern found.
4970 case ISD::BUILD_VECTOR: {
4971 // The BUILD_VECTOR node must be a splat.
4972 if (!isSplatVector(V.getNode()))
4975 Ld = V.getOperand(0);
4977 // The suspected load node has several users. Make sure that all
4978 // of its users are from the BUILD_VECTOR node.
4979 if (!Ld->hasNUsesOfValue(VT.getVectorNumElements(), 0))
4984 case ISD::VECTOR_SHUFFLE: {
4985 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
4987 // Shuffles must have a splat mask where the first element is
4989 if ((!SVOp->isSplat()) || SVOp->getMaskElt(0) != 0)
4992 SDValue Sc = Op.getOperand(0);
4993 if (Sc.getOpcode() != ISD::SCALAR_TO_VECTOR)
4996 Ld = Sc.getOperand(0);
4998 // The scalar_to_vector node and the suspected
4999 // load node must have exactly one user.
5000 if (!Sc.hasOneUse() || !Ld.hasOneUse())
5006 // The scalar source must be a normal load.
5007 if (!ISD::isNormalLoad(Ld.getNode()))
5010 bool Is256 = VT.getSizeInBits() == 256;
5011 bool Is128 = VT.getSizeInBits() == 128;
5012 unsigned ScalarSize = Ld.getValueType().getSizeInBits();
5014 // VBroadcast to YMM
5015 if (Is256 && (ScalarSize == 32 || ScalarSize == 64))
5018 // VBroadcast to XMM
5019 if (Is128 && (ScalarSize == 32))
5022 // The integer check is needed for the 64-bit into 128-bit so it doesn't match
5023 // double since there is vbroadcastsd xmm
5024 if (Subtarget->hasAVX2() && Ld.getValueType().isInteger()) {
5025 // VBroadcast to YMM
5026 if (Is256 && (ScalarSize == 8 || ScalarSize == 16))
5029 // VBroadcast to XMM
5030 if (Is128 && (ScalarSize == 8 || ScalarSize == 16 || ScalarSize == 64))
5034 // Unsupported broadcast.
5039 X86TargetLowering::LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG) const {
5040 DebugLoc dl = Op.getDebugLoc();
5042 EVT VT = Op.getValueType();
5043 EVT ExtVT = VT.getVectorElementType();
5044 unsigned NumElems = Op.getNumOperands();
5046 // Vectors containing all zeros can be matched by pxor and xorps later
5047 if (ISD::isBuildVectorAllZeros(Op.getNode())) {
5048 // Canonicalize this to <4 x i32> to 1) ensure the zero vectors are CSE'd
5049 // and 2) ensure that i64 scalars are eliminated on x86-32 hosts.
5050 if (Op.getValueType() == MVT::v4i32 ||
5051 Op.getValueType() == MVT::v8i32)
5054 return getZeroVector(Op.getValueType(), Subtarget->hasSSE2(),
5055 Subtarget->hasAVX2(), DAG, dl);
5058 // Vectors containing all ones can be matched by pcmpeqd on 128-bit width
5059 // vectors or broken into v4i32 operations on 256-bit vectors. AVX2 can use
5060 // vpcmpeqd on 256-bit vectors.
5061 if (ISD::isBuildVectorAllOnes(Op.getNode())) {
5062 if (Op.getValueType() == MVT::v4i32 ||
5063 (Op.getValueType() == MVT::v8i32 && Subtarget->hasAVX2()))
5066 return getOnesVector(Op.getValueType(), Subtarget->hasAVX2(), DAG, dl);
5069 SDValue LD = isVectorBroadcast(Op, Subtarget);
5071 return DAG.getNode(X86ISD::VBROADCAST, dl, VT, LD);
5073 unsigned EVTBits = ExtVT.getSizeInBits();
5075 unsigned NumZero = 0;
5076 unsigned NumNonZero = 0;
5077 unsigned NonZeros = 0;
5078 bool IsAllConstants = true;
5079 SmallSet<SDValue, 8> Values;
5080 for (unsigned i = 0; i < NumElems; ++i) {
5081 SDValue Elt = Op.getOperand(i);
5082 if (Elt.getOpcode() == ISD::UNDEF)
5085 if (Elt.getOpcode() != ISD::Constant &&
5086 Elt.getOpcode() != ISD::ConstantFP)
5087 IsAllConstants = false;
5088 if (X86::isZeroNode(Elt))
5091 NonZeros |= (1 << i);
5096 // All undef vector. Return an UNDEF. All zero vectors were handled above.
5097 if (NumNonZero == 0)
5098 return DAG.getUNDEF(VT);
5100 // Special case for single non-zero, non-undef, element.
5101 if (NumNonZero == 1) {
5102 unsigned Idx = CountTrailingZeros_32(NonZeros);
5103 SDValue Item = Op.getOperand(Idx);
5105 // If this is an insertion of an i64 value on x86-32, and if the top bits of
5106 // the value are obviously zero, truncate the value to i32 and do the
5107 // insertion that way. Only do this if the value is non-constant or if the
5108 // value is a constant being inserted into element 0. It is cheaper to do
5109 // a constant pool load than it is to do a movd + shuffle.
5110 if (ExtVT == MVT::i64 && !Subtarget->is64Bit() &&
5111 (!IsAllConstants || Idx == 0)) {
5112 if (DAG.MaskedValueIsZero(Item, APInt::getBitsSet(64, 32, 64))) {
5114 assert(VT == MVT::v2i64 && "Expected an SSE value type!");
5115 EVT VecVT = MVT::v4i32;
5116 unsigned VecElts = 4;
5118 // Truncate the value (which may itself be a constant) to i32, and
5119 // convert it to a vector with movd (S2V+shuffle to zero extend).
5120 Item = DAG.getNode(ISD::TRUNCATE, dl, MVT::i32, Item);
5121 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VecVT, Item);
5122 Item = getShuffleVectorZeroOrUndef(Item, 0, true, Subtarget, DAG);
5124 // Now we have our 32-bit value zero extended in the low element of
5125 // a vector. If Idx != 0, swizzle it into place.
5127 SmallVector<int, 4> Mask;
5128 Mask.push_back(Idx);
5129 for (unsigned i = 1; i != VecElts; ++i)
5131 Item = DAG.getVectorShuffle(VecVT, dl, Item,
5132 DAG.getUNDEF(Item.getValueType()),
5135 return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(), Item);
5139 // If we have a constant or non-constant insertion into the low element of
5140 // a vector, we can do this with SCALAR_TO_VECTOR + shuffle of zero into
5141 // the rest of the elements. This will be matched as movd/movq/movss/movsd
5142 // depending on what the source datatype is.
5145 return DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Item);
5147 if (ExtVT == MVT::i32 || ExtVT == MVT::f32 || ExtVT == MVT::f64 ||
5148 (ExtVT == MVT::i64 && Subtarget->is64Bit())) {
5149 if (VT.getSizeInBits() == 256) {
5150 SDValue ZeroVec = getZeroVector(VT, Subtarget->hasSSE2(),
5151 Subtarget->hasAVX2(), DAG, dl);
5152 return DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, ZeroVec,
5153 Item, DAG.getIntPtrConstant(0));
5155 assert(VT.getSizeInBits() == 128 && "Expected an SSE value type!");
5156 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Item);
5157 // Turn it into a MOVL (i.e. movss, movsd, or movd) to a zero vector.
5158 return getShuffleVectorZeroOrUndef(Item, 0, true, Subtarget, DAG);
5161 if (ExtVT == MVT::i16 || ExtVT == MVT::i8) {
5162 Item = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, Item);
5163 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32, Item);
5164 if (VT.getSizeInBits() == 256) {
5165 SDValue ZeroVec = getZeroVector(MVT::v8i32, Subtarget->hasSSE2(),
5166 Subtarget->hasAVX2(), DAG, dl);
5167 Item = Insert128BitVector(ZeroVec, Item, DAG.getConstant(0, MVT::i32),
5170 assert(VT.getSizeInBits() == 128 && "Expected an SSE value type!");
5171 Item = getShuffleVectorZeroOrUndef(Item, 0, true, Subtarget, DAG);
5173 return DAG.getNode(ISD::BITCAST, dl, VT, Item);
5177 // Is it a vector logical left shift?
5178 if (NumElems == 2 && Idx == 1 &&
5179 X86::isZeroNode(Op.getOperand(0)) &&
5180 !X86::isZeroNode(Op.getOperand(1))) {
5181 unsigned NumBits = VT.getSizeInBits();
5182 return getVShift(true, VT,
5183 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
5184 VT, Op.getOperand(1)),
5185 NumBits/2, DAG, *this, dl);
5188 if (IsAllConstants) // Otherwise, it's better to do a constpool load.
5191 // Otherwise, if this is a vector with i32 or f32 elements, and the element
5192 // is a non-constant being inserted into an element other than the low one,
5193 // we can't use a constant pool load. Instead, use SCALAR_TO_VECTOR (aka
5194 // movd/movss) to move this into the low element, then shuffle it into
5196 if (EVTBits == 32) {
5197 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Item);
5199 // Turn it into a shuffle of zero and zero-extended scalar to vector.
5200 Item = getShuffleVectorZeroOrUndef(Item, 0, NumZero > 0, Subtarget, DAG);
5201 SmallVector<int, 8> MaskVec;
5202 for (unsigned i = 0; i < NumElems; i++)
5203 MaskVec.push_back(i == Idx ? 0 : 1);
5204 return DAG.getVectorShuffle(VT, dl, Item, DAG.getUNDEF(VT), &MaskVec[0]);
5208 // Splat is obviously ok. Let legalizer expand it to a shuffle.
5209 if (Values.size() == 1) {
5210 if (EVTBits == 32) {
5211 // Instead of a shuffle like this:
5212 // shuffle (scalar_to_vector (load (ptr + 4))), undef, <0, 0, 0, 0>
5213 // Check if it's possible to issue this instead.
5214 // shuffle (vload ptr)), undef, <1, 1, 1, 1>
5215 unsigned Idx = CountTrailingZeros_32(NonZeros);
5216 SDValue Item = Op.getOperand(Idx);
5217 if (Op.getNode()->isOnlyUserOf(Item.getNode()))
5218 return LowerAsSplatVectorLoad(Item, VT, dl, DAG);
5223 // A vector full of immediates; various special cases are already
5224 // handled, so this is best done with a single constant-pool load.
5228 // For AVX-length vectors, build the individual 128-bit pieces and use
5229 // shuffles to put them in place.
5230 if (VT.getSizeInBits() == 256 && !ISD::isBuildVectorAllZeros(Op.getNode())) {
5231 SmallVector<SDValue, 32> V;
5232 for (unsigned i = 0; i < NumElems; ++i)
5233 V.push_back(Op.getOperand(i));
5235 EVT HVT = EVT::getVectorVT(*DAG.getContext(), ExtVT, NumElems/2);
5237 // Build both the lower and upper subvector.
5238 SDValue Lower = DAG.getNode(ISD::BUILD_VECTOR, dl, HVT, &V[0], NumElems/2);
5239 SDValue Upper = DAG.getNode(ISD::BUILD_VECTOR, dl, HVT, &V[NumElems / 2],
5242 // Recreate the wider vector with the lower and upper part.
5243 SDValue Vec = Insert128BitVector(DAG.getNode(ISD::UNDEF, dl, VT), Lower,
5244 DAG.getConstant(0, MVT::i32), DAG, dl);
5245 return Insert128BitVector(Vec, Upper, DAG.getConstant(NumElems/2, MVT::i32),
5249 // Let legalizer expand 2-wide build_vectors.
5250 if (EVTBits == 64) {
5251 if (NumNonZero == 1) {
5252 // One half is zero or undef.
5253 unsigned Idx = CountTrailingZeros_32(NonZeros);
5254 SDValue V2 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT,
5255 Op.getOperand(Idx));
5256 return getShuffleVectorZeroOrUndef(V2, Idx, true, Subtarget, DAG);
5261 // If element VT is < 32 bits, convert it to inserts into a zero vector.
5262 if (EVTBits == 8 && NumElems == 16) {
5263 SDValue V = LowerBuildVectorv16i8(Op, NonZeros,NumNonZero,NumZero, DAG,
5265 if (V.getNode()) return V;
5268 if (EVTBits == 16 && NumElems == 8) {
5269 SDValue V = LowerBuildVectorv8i16(Op, NonZeros,NumNonZero,NumZero, DAG,
5271 if (V.getNode()) return V;
5274 // If element VT is == 32 bits, turn it into a number of shuffles.
5275 SmallVector<SDValue, 8> V;
5277 if (NumElems == 4 && NumZero > 0) {
5278 for (unsigned i = 0; i < 4; ++i) {
5279 bool isZero = !(NonZeros & (1 << i));
5281 V[i] = getZeroVector(VT, Subtarget->hasSSE2(), Subtarget->hasAVX2(),
5284 V[i] = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Op.getOperand(i));
5287 for (unsigned i = 0; i < 2; ++i) {
5288 switch ((NonZeros & (0x3 << i*2)) >> (i*2)) {
5291 V[i] = V[i*2]; // Must be a zero vector.
5294 V[i] = getMOVL(DAG, dl, VT, V[i*2+1], V[i*2]);
5297 V[i] = getMOVL(DAG, dl, VT, V[i*2], V[i*2+1]);
5300 V[i] = getUnpackl(DAG, dl, VT, V[i*2], V[i*2+1]);
5305 SmallVector<int, 8> MaskVec;
5306 bool Reverse = (NonZeros & 0x3) == 2;
5307 for (unsigned i = 0; i < 2; ++i)
5308 MaskVec.push_back(Reverse ? 1-i : i);
5309 Reverse = ((NonZeros & (0x3 << 2)) >> 2) == 2;
5310 for (unsigned i = 0; i < 2; ++i)
5311 MaskVec.push_back(Reverse ? 1-i+NumElems : i+NumElems);
5312 return DAG.getVectorShuffle(VT, dl, V[0], V[1], &MaskVec[0]);
5315 if (Values.size() > 1 && VT.getSizeInBits() == 128) {
5316 // Check for a build vector of consecutive loads.
5317 for (unsigned i = 0; i < NumElems; ++i)
5318 V[i] = Op.getOperand(i);
5320 // Check for elements which are consecutive loads.
5321 SDValue LD = EltsFromConsecutiveLoads(VT, V, dl, DAG);
5325 // For SSE 4.1, use insertps to put the high elements into the low element.
5326 if (getSubtarget()->hasSSE41()) {
5328 if (Op.getOperand(0).getOpcode() != ISD::UNDEF)
5329 Result = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Op.getOperand(0));
5331 Result = DAG.getUNDEF(VT);
5333 for (unsigned i = 1; i < NumElems; ++i) {
5334 if (Op.getOperand(i).getOpcode() == ISD::UNDEF) continue;
5335 Result = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, Result,
5336 Op.getOperand(i), DAG.getIntPtrConstant(i));
5341 // Otherwise, expand into a number of unpckl*, start by extending each of
5342 // our (non-undef) elements to the full vector width with the element in the
5343 // bottom slot of the vector (which generates no code for SSE).
5344 for (unsigned i = 0; i < NumElems; ++i) {
5345 if (Op.getOperand(i).getOpcode() != ISD::UNDEF)
5346 V[i] = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Op.getOperand(i));
5348 V[i] = DAG.getUNDEF(VT);
5351 // Next, we iteratively mix elements, e.g. for v4f32:
5352 // Step 1: unpcklps 0, 2 ==> X: <?, ?, 2, 0>
5353 // : unpcklps 1, 3 ==> Y: <?, ?, 3, 1>
5354 // Step 2: unpcklps X, Y ==> <3, 2, 1, 0>
5355 unsigned EltStride = NumElems >> 1;
5356 while (EltStride != 0) {
5357 for (unsigned i = 0; i < EltStride; ++i) {
5358 // If V[i+EltStride] is undef and this is the first round of mixing,
5359 // then it is safe to just drop this shuffle: V[i] is already in the
5360 // right place, the one element (since it's the first round) being
5361 // inserted as undef can be dropped. This isn't safe for successive
5362 // rounds because they will permute elements within both vectors.
5363 if (V[i+EltStride].getOpcode() == ISD::UNDEF &&
5364 EltStride == NumElems/2)
5367 V[i] = getUnpackl(DAG, dl, VT, V[i], V[i + EltStride]);
5376 // LowerMMXCONCAT_VECTORS - We support concatenate two MMX registers and place
5377 // them in a MMX register. This is better than doing a stack convert.
5378 static SDValue LowerMMXCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) {
5379 DebugLoc dl = Op.getDebugLoc();
5380 EVT ResVT = Op.getValueType();
5382 assert(ResVT == MVT::v2i64 || ResVT == MVT::v4i32 ||
5383 ResVT == MVT::v8i16 || ResVT == MVT::v16i8);
5385 SDValue InVec = DAG.getNode(ISD::BITCAST,dl, MVT::v1i64, Op.getOperand(0));
5386 SDValue VecOp = DAG.getNode(X86ISD::MOVQ2DQ, dl, MVT::v2i64, InVec);
5387 InVec = Op.getOperand(1);
5388 if (InVec.getOpcode() == ISD::SCALAR_TO_VECTOR) {
5389 unsigned NumElts = ResVT.getVectorNumElements();
5390 VecOp = DAG.getNode(ISD::BITCAST, dl, ResVT, VecOp);
5391 VecOp = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, ResVT, VecOp,
5392 InVec.getOperand(0), DAG.getIntPtrConstant(NumElts/2+1));
5394 InVec = DAG.getNode(ISD::BITCAST, dl, MVT::v1i64, InVec);
5395 SDValue VecOp2 = DAG.getNode(X86ISD::MOVQ2DQ, dl, MVT::v2i64, InVec);
5396 Mask[0] = 0; Mask[1] = 2;
5397 VecOp = DAG.getVectorShuffle(MVT::v2i64, dl, VecOp, VecOp2, Mask);
5399 return DAG.getNode(ISD::BITCAST, dl, ResVT, VecOp);
5402 // LowerAVXCONCAT_VECTORS - 256-bit AVX can use the vinsertf128 instruction
5403 // to create 256-bit vectors from two other 128-bit ones.
5404 static SDValue LowerAVXCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) {
5405 DebugLoc dl = Op.getDebugLoc();
5406 EVT ResVT = Op.getValueType();
5408 assert(ResVT.getSizeInBits() == 256 && "Value type must be 256-bit wide");
5410 SDValue V1 = Op.getOperand(0);
5411 SDValue V2 = Op.getOperand(1);
5412 unsigned NumElems = ResVT.getVectorNumElements();
5414 SDValue V = Insert128BitVector(DAG.getNode(ISD::UNDEF, dl, ResVT), V1,
5415 DAG.getConstant(0, MVT::i32), DAG, dl);
5416 return Insert128BitVector(V, V2, DAG.getConstant(NumElems/2, MVT::i32),
5421 X86TargetLowering::LowerCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) const {
5422 EVT ResVT = Op.getValueType();
5424 assert(Op.getNumOperands() == 2);
5425 assert((ResVT.getSizeInBits() == 128 || ResVT.getSizeInBits() == 256) &&
5426 "Unsupported CONCAT_VECTORS for value type");
5428 // We support concatenate two MMX registers and place them in a MMX register.
5429 // This is better than doing a stack convert.
5430 if (ResVT.is128BitVector())
5431 return LowerMMXCONCAT_VECTORS(Op, DAG);
5433 // 256-bit AVX can use the vinsertf128 instruction to create 256-bit vectors
5434 // from two other 128-bit ones.
5435 return LowerAVXCONCAT_VECTORS(Op, DAG);
5438 // v8i16 shuffles - Prefer shuffles in the following order:
5439 // 1. [all] pshuflw, pshufhw, optional move
5440 // 2. [ssse3] 1 x pshufb
5441 // 3. [ssse3] 2 x pshufb + 1 x por
5442 // 4. [all] mov + pshuflw + pshufhw + N x (pextrw + pinsrw)
5444 X86TargetLowering::LowerVECTOR_SHUFFLEv8i16(SDValue Op,
5445 SelectionDAG &DAG) const {
5446 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
5447 SDValue V1 = SVOp->getOperand(0);
5448 SDValue V2 = SVOp->getOperand(1);
5449 DebugLoc dl = SVOp->getDebugLoc();
5450 SmallVector<int, 8> MaskVals;
5452 // Determine if more than 1 of the words in each of the low and high quadwords
5453 // of the result come from the same quadword of one of the two inputs. Undef
5454 // mask values count as coming from any quadword, for better codegen.
5455 unsigned LoQuad[] = { 0, 0, 0, 0 };
5456 unsigned HiQuad[] = { 0, 0, 0, 0 };
5457 BitVector InputQuads(4);
5458 for (unsigned i = 0; i < 8; ++i) {
5459 unsigned *Quad = i < 4 ? LoQuad : HiQuad;
5460 int EltIdx = SVOp->getMaskElt(i);
5461 MaskVals.push_back(EltIdx);
5470 InputQuads.set(EltIdx / 4);
5473 int BestLoQuad = -1;
5474 unsigned MaxQuad = 1;
5475 for (unsigned i = 0; i < 4; ++i) {
5476 if (LoQuad[i] > MaxQuad) {
5478 MaxQuad = LoQuad[i];
5482 int BestHiQuad = -1;
5484 for (unsigned i = 0; i < 4; ++i) {
5485 if (HiQuad[i] > MaxQuad) {
5487 MaxQuad = HiQuad[i];
5491 // For SSSE3, If all 8 words of the result come from only 1 quadword of each
5492 // of the two input vectors, shuffle them into one input vector so only a
5493 // single pshufb instruction is necessary. If There are more than 2 input
5494 // quads, disable the next transformation since it does not help SSSE3.
5495 bool V1Used = InputQuads[0] || InputQuads[1];
5496 bool V2Used = InputQuads[2] || InputQuads[3];
5497 if (Subtarget->hasSSSE3()) {
5498 if (InputQuads.count() == 2 && V1Used && V2Used) {
5499 BestLoQuad = InputQuads.find_first();
5500 BestHiQuad = InputQuads.find_next(BestLoQuad);
5502 if (InputQuads.count() > 2) {
5508 // If BestLoQuad or BestHiQuad are set, shuffle the quads together and update
5509 // the shuffle mask. If a quad is scored as -1, that means that it contains
5510 // words from all 4 input quadwords.
5512 if (BestLoQuad >= 0 || BestHiQuad >= 0) {
5513 SmallVector<int, 8> MaskV;
5514 MaskV.push_back(BestLoQuad < 0 ? 0 : BestLoQuad);
5515 MaskV.push_back(BestHiQuad < 0 ? 1 : BestHiQuad);
5516 NewV = DAG.getVectorShuffle(MVT::v2i64, dl,
5517 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64, V1),
5518 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64, V2), &MaskV[0]);
5519 NewV = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, NewV);
5521 // Rewrite the MaskVals and assign NewV to V1 if NewV now contains all the
5522 // source words for the shuffle, to aid later transformations.
5523 bool AllWordsInNewV = true;
5524 bool InOrder[2] = { true, true };
5525 for (unsigned i = 0; i != 8; ++i) {
5526 int idx = MaskVals[i];
5528 InOrder[i/4] = false;
5529 if (idx < 0 || (idx/4) == BestLoQuad || (idx/4) == BestHiQuad)
5531 AllWordsInNewV = false;
5535 bool pshuflw = AllWordsInNewV, pshufhw = AllWordsInNewV;
5536 if (AllWordsInNewV) {
5537 for (int i = 0; i != 8; ++i) {
5538 int idx = MaskVals[i];
5541 idx = MaskVals[i] = (idx / 4) == BestLoQuad ? (idx & 3) : (idx & 3) + 4;
5542 if ((idx != i) && idx < 4)
5544 if ((idx != i) && idx > 3)
5553 // If we've eliminated the use of V2, and the new mask is a pshuflw or
5554 // pshufhw, that's as cheap as it gets. Return the new shuffle.
5555 if ((pshufhw && InOrder[0]) || (pshuflw && InOrder[1])) {
5556 unsigned Opc = pshufhw ? X86ISD::PSHUFHW : X86ISD::PSHUFLW;
5557 unsigned TargetMask = 0;
5558 NewV = DAG.getVectorShuffle(MVT::v8i16, dl, NewV,
5559 DAG.getUNDEF(MVT::v8i16), &MaskVals[0]);
5560 TargetMask = pshufhw ? X86::getShufflePSHUFHWImmediate(NewV.getNode()):
5561 X86::getShufflePSHUFLWImmediate(NewV.getNode());
5562 V1 = NewV.getOperand(0);
5563 return getTargetShuffleNode(Opc, dl, MVT::v8i16, V1, TargetMask, DAG);
5567 // If we have SSSE3, and all words of the result are from 1 input vector,
5568 // case 2 is generated, otherwise case 3 is generated. If no SSSE3
5569 // is present, fall back to case 4.
5570 if (Subtarget->hasSSSE3()) {
5571 SmallVector<SDValue,16> pshufbMask;
5573 // If we have elements from both input vectors, set the high bit of the
5574 // shuffle mask element to zero out elements that come from V2 in the V1
5575 // mask, and elements that come from V1 in the V2 mask, so that the two
5576 // results can be OR'd together.
5577 bool TwoInputs = V1Used && V2Used;
5578 for (unsigned i = 0; i != 8; ++i) {
5579 int EltIdx = MaskVals[i] * 2;
5580 if (TwoInputs && (EltIdx >= 16)) {
5581 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
5582 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
5585 pshufbMask.push_back(DAG.getConstant(EltIdx, MVT::i8));
5586 pshufbMask.push_back(DAG.getConstant(EltIdx+1, MVT::i8));
5588 V1 = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, V1);
5589 V1 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V1,
5590 DAG.getNode(ISD::BUILD_VECTOR, dl,
5591 MVT::v16i8, &pshufbMask[0], 16));
5593 return DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, V1);
5595 // Calculate the shuffle mask for the second input, shuffle it, and
5596 // OR it with the first shuffled input.
5598 for (unsigned i = 0; i != 8; ++i) {
5599 int EltIdx = MaskVals[i] * 2;
5601 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
5602 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
5605 pshufbMask.push_back(DAG.getConstant(EltIdx - 16, MVT::i8));
5606 pshufbMask.push_back(DAG.getConstant(EltIdx - 15, MVT::i8));
5608 V2 = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, V2);
5609 V2 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V2,
5610 DAG.getNode(ISD::BUILD_VECTOR, dl,
5611 MVT::v16i8, &pshufbMask[0], 16));
5612 V1 = DAG.getNode(ISD::OR, dl, MVT::v16i8, V1, V2);
5613 return DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, V1);
5616 // If BestLoQuad >= 0, generate a pshuflw to put the low elements in order,
5617 // and update MaskVals with new element order.
5618 BitVector InOrder(8);
5619 if (BestLoQuad >= 0) {
5620 SmallVector<int, 8> MaskV;
5621 for (int i = 0; i != 4; ++i) {
5622 int idx = MaskVals[i];
5624 MaskV.push_back(-1);
5626 } else if ((idx / 4) == BestLoQuad) {
5627 MaskV.push_back(idx & 3);
5630 MaskV.push_back(-1);
5633 for (unsigned i = 4; i != 8; ++i)
5635 NewV = DAG.getVectorShuffle(MVT::v8i16, dl, NewV, DAG.getUNDEF(MVT::v8i16),
5638 if (NewV.getOpcode() == ISD::VECTOR_SHUFFLE && Subtarget->hasSSSE3())
5639 NewV = getTargetShuffleNode(X86ISD::PSHUFLW, dl, MVT::v8i16,
5641 X86::getShufflePSHUFLWImmediate(NewV.getNode()),
5645 // If BestHi >= 0, generate a pshufhw to put the high elements in order,
5646 // and update MaskVals with the new element order.
5647 if (BestHiQuad >= 0) {
5648 SmallVector<int, 8> MaskV;
5649 for (unsigned i = 0; i != 4; ++i)
5651 for (unsigned i = 4; i != 8; ++i) {
5652 int idx = MaskVals[i];
5654 MaskV.push_back(-1);
5656 } else if ((idx / 4) == BestHiQuad) {
5657 MaskV.push_back((idx & 3) + 4);
5660 MaskV.push_back(-1);
5663 NewV = DAG.getVectorShuffle(MVT::v8i16, dl, NewV, DAG.getUNDEF(MVT::v8i16),
5666 if (NewV.getOpcode() == ISD::VECTOR_SHUFFLE && Subtarget->hasSSSE3())
5667 NewV = getTargetShuffleNode(X86ISD::PSHUFHW, dl, MVT::v8i16,
5669 X86::getShufflePSHUFHWImmediate(NewV.getNode()),
5673 // In case BestHi & BestLo were both -1, which means each quadword has a word
5674 // from each of the four input quadwords, calculate the InOrder bitvector now
5675 // before falling through to the insert/extract cleanup.
5676 if (BestLoQuad == -1 && BestHiQuad == -1) {
5678 for (int i = 0; i != 8; ++i)
5679 if (MaskVals[i] < 0 || MaskVals[i] == i)
5683 // The other elements are put in the right place using pextrw and pinsrw.
5684 for (unsigned i = 0; i != 8; ++i) {
5687 int EltIdx = MaskVals[i];
5690 SDValue ExtOp = (EltIdx < 8)
5691 ? DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, V1,
5692 DAG.getIntPtrConstant(EltIdx))
5693 : DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, V2,
5694 DAG.getIntPtrConstant(EltIdx - 8));
5695 NewV = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, NewV, ExtOp,
5696 DAG.getIntPtrConstant(i));
5701 // v16i8 shuffles - Prefer shuffles in the following order:
5702 // 1. [ssse3] 1 x pshufb
5703 // 2. [ssse3] 2 x pshufb + 1 x por
5704 // 3. [all] v8i16 shuffle + N x pextrw + rotate + pinsrw
5706 SDValue LowerVECTOR_SHUFFLEv16i8(ShuffleVectorSDNode *SVOp,
5708 const X86TargetLowering &TLI) {
5709 SDValue V1 = SVOp->getOperand(0);
5710 SDValue V2 = SVOp->getOperand(1);
5711 DebugLoc dl = SVOp->getDebugLoc();
5712 ArrayRef<int> MaskVals = SVOp->getMask();
5714 // If we have SSSE3, case 1 is generated when all result bytes come from
5715 // one of the inputs. Otherwise, case 2 is generated. If no SSSE3 is
5716 // present, fall back to case 3.
5717 // FIXME: kill V2Only once shuffles are canonizalized by getNode.
5720 for (unsigned i = 0; i < 16; ++i) {
5721 int EltIdx = MaskVals[i];
5730 // If SSSE3, use 1 pshufb instruction per vector with elements in the result.
5731 if (TLI.getSubtarget()->hasSSSE3()) {
5732 SmallVector<SDValue,16> pshufbMask;
5734 // If all result elements are from one input vector, then only translate
5735 // undef mask values to 0x80 (zero out result) in the pshufb mask.
5737 // Otherwise, we have elements from both input vectors, and must zero out
5738 // elements that come from V2 in the first mask, and V1 in the second mask
5739 // so that we can OR them together.
5740 bool TwoInputs = !(V1Only || V2Only);
5741 for (unsigned i = 0; i != 16; ++i) {
5742 int EltIdx = MaskVals[i];
5743 if (EltIdx < 0 || (TwoInputs && EltIdx >= 16)) {
5744 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
5747 pshufbMask.push_back(DAG.getConstant(EltIdx, MVT::i8));
5749 // If all the elements are from V2, assign it to V1 and return after
5750 // building the first pshufb.
5753 V1 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V1,
5754 DAG.getNode(ISD::BUILD_VECTOR, dl,
5755 MVT::v16i8, &pshufbMask[0], 16));
5759 // Calculate the shuffle mask for the second input, shuffle it, and
5760 // OR it with the first shuffled input.
5762 for (unsigned i = 0; i != 16; ++i) {
5763 int EltIdx = MaskVals[i];
5765 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
5768 pshufbMask.push_back(DAG.getConstant(EltIdx - 16, MVT::i8));
5770 V2 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V2,
5771 DAG.getNode(ISD::BUILD_VECTOR, dl,
5772 MVT::v16i8, &pshufbMask[0], 16));
5773 return DAG.getNode(ISD::OR, dl, MVT::v16i8, V1, V2);
5776 // No SSSE3 - Calculate in place words and then fix all out of place words
5777 // With 0-16 extracts & inserts. Worst case is 16 bytes out of order from
5778 // the 16 different words that comprise the two doublequadword input vectors.
5779 V1 = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, V1);
5780 V2 = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, V2);
5781 SDValue NewV = V2Only ? V2 : V1;
5782 for (int i = 0; i != 8; ++i) {
5783 int Elt0 = MaskVals[i*2];
5784 int Elt1 = MaskVals[i*2+1];
5786 // This word of the result is all undef, skip it.
5787 if (Elt0 < 0 && Elt1 < 0)
5790 // This word of the result is already in the correct place, skip it.
5791 if (V1Only && (Elt0 == i*2) && (Elt1 == i*2+1))
5793 if (V2Only && (Elt0 == i*2+16) && (Elt1 == i*2+17))
5796 SDValue Elt0Src = Elt0 < 16 ? V1 : V2;
5797 SDValue Elt1Src = Elt1 < 16 ? V1 : V2;
5800 // If Elt0 and Elt1 are defined, are consecutive, and can be load
5801 // using a single extract together, load it and store it.
5802 if ((Elt0 >= 0) && ((Elt0 + 1) == Elt1) && ((Elt0 & 1) == 0)) {
5803 InsElt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, Elt1Src,
5804 DAG.getIntPtrConstant(Elt1 / 2));
5805 NewV = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, NewV, InsElt,
5806 DAG.getIntPtrConstant(i));
5810 // If Elt1 is defined, extract it from the appropriate source. If the
5811 // source byte is not also odd, shift the extracted word left 8 bits
5812 // otherwise clear the bottom 8 bits if we need to do an or.
5814 InsElt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, Elt1Src,
5815 DAG.getIntPtrConstant(Elt1 / 2));
5816 if ((Elt1 & 1) == 0)
5817 InsElt = DAG.getNode(ISD::SHL, dl, MVT::i16, InsElt,
5819 TLI.getShiftAmountTy(InsElt.getValueType())));
5821 InsElt = DAG.getNode(ISD::AND, dl, MVT::i16, InsElt,
5822 DAG.getConstant(0xFF00, MVT::i16));
5824 // If Elt0 is defined, extract it from the appropriate source. If the
5825 // source byte is not also even, shift the extracted word right 8 bits. If
5826 // Elt1 was also defined, OR the extracted values together before
5827 // inserting them in the result.
5829 SDValue InsElt0 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16,
5830 Elt0Src, DAG.getIntPtrConstant(Elt0 / 2));
5831 if ((Elt0 & 1) != 0)
5832 InsElt0 = DAG.getNode(ISD::SRL, dl, MVT::i16, InsElt0,
5834 TLI.getShiftAmountTy(InsElt0.getValueType())));
5836 InsElt0 = DAG.getNode(ISD::AND, dl, MVT::i16, InsElt0,
5837 DAG.getConstant(0x00FF, MVT::i16));
5838 InsElt = Elt1 >= 0 ? DAG.getNode(ISD::OR, dl, MVT::i16, InsElt, InsElt0)
5841 NewV = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, NewV, InsElt,
5842 DAG.getIntPtrConstant(i));
5844 return DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, NewV);
5847 /// RewriteAsNarrowerShuffle - Try rewriting v8i16 and v16i8 shuffles as 4 wide
5848 /// ones, or rewriting v4i32 / v4f32 as 2 wide ones if possible. This can be
5849 /// done when every pair / quad of shuffle mask elements point to elements in
5850 /// the right sequence. e.g.
5851 /// vector_shuffle X, Y, <2, 3, | 10, 11, | 0, 1, | 14, 15>
5853 SDValue RewriteAsNarrowerShuffle(ShuffleVectorSDNode *SVOp,
5854 SelectionDAG &DAG, DebugLoc dl) {
5855 EVT VT = SVOp->getValueType(0);
5856 SDValue V1 = SVOp->getOperand(0);
5857 SDValue V2 = SVOp->getOperand(1);
5858 unsigned NumElems = VT.getVectorNumElements();
5859 unsigned NewWidth = (NumElems == 4) ? 2 : 4;
5861 switch (VT.getSimpleVT().SimpleTy) {
5862 default: assert(false && "Unexpected!");
5863 case MVT::v4f32: NewVT = MVT::v2f64; break;
5864 case MVT::v4i32: NewVT = MVT::v2i64; break;
5865 case MVT::v8i16: NewVT = MVT::v4i32; break;
5866 case MVT::v16i8: NewVT = MVT::v4i32; break;
5869 int Scale = NumElems / NewWidth;
5870 SmallVector<int, 8> MaskVec;
5871 for (unsigned i = 0; i < NumElems; i += Scale) {
5873 for (int j = 0; j < Scale; ++j) {
5874 int EltIdx = SVOp->getMaskElt(i+j);
5878 StartIdx = EltIdx - (EltIdx % Scale);
5879 if (EltIdx != StartIdx + j)
5883 MaskVec.push_back(-1);
5885 MaskVec.push_back(StartIdx / Scale);
5888 V1 = DAG.getNode(ISD::BITCAST, dl, NewVT, V1);
5889 V2 = DAG.getNode(ISD::BITCAST, dl, NewVT, V2);
5890 return DAG.getVectorShuffle(NewVT, dl, V1, V2, &MaskVec[0]);
5893 /// getVZextMovL - Return a zero-extending vector move low node.
5895 static SDValue getVZextMovL(EVT VT, EVT OpVT,
5896 SDValue SrcOp, SelectionDAG &DAG,
5897 const X86Subtarget *Subtarget, DebugLoc dl) {
5898 if (VT == MVT::v2f64 || VT == MVT::v4f32) {
5899 LoadSDNode *LD = NULL;
5900 if (!isScalarLoadToVector(SrcOp.getNode(), &LD))
5901 LD = dyn_cast<LoadSDNode>(SrcOp);
5903 // movssrr and movsdrr do not clear top bits. Try to use movd, movq
5905 MVT ExtVT = (OpVT == MVT::v2f64) ? MVT::i64 : MVT::i32;
5906 if ((ExtVT != MVT::i64 || Subtarget->is64Bit()) &&
5907 SrcOp.getOpcode() == ISD::SCALAR_TO_VECTOR &&
5908 SrcOp.getOperand(0).getOpcode() == ISD::BITCAST &&
5909 SrcOp.getOperand(0).getOperand(0).getValueType() == ExtVT) {
5911 OpVT = (OpVT == MVT::v2f64) ? MVT::v2i64 : MVT::v4i32;
5912 return DAG.getNode(ISD::BITCAST, dl, VT,
5913 DAG.getNode(X86ISD::VZEXT_MOVL, dl, OpVT,
5914 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
5922 return DAG.getNode(ISD::BITCAST, dl, VT,
5923 DAG.getNode(X86ISD::VZEXT_MOVL, dl, OpVT,
5924 DAG.getNode(ISD::BITCAST, dl,
5928 /// areShuffleHalvesWithinDisjointLanes - Check whether each half of a vector
5929 /// shuffle node referes to only one lane in the sources.
5930 static bool areShuffleHalvesWithinDisjointLanes(ShuffleVectorSDNode *SVOp) {
5931 EVT VT = SVOp->getValueType(0);
5932 int NumElems = VT.getVectorNumElements();
5933 int HalfSize = NumElems/2;
5934 ArrayRef<int> M = SVOp->getMask();
5935 bool MatchA = false, MatchB = false;
5937 for (int l = 0; l < NumElems*2; l += HalfSize) {
5938 if (isUndefOrInRange(M, 0, HalfSize, l, l+HalfSize)) {
5944 for (int l = 0; l < NumElems*2; l += HalfSize) {
5945 if (isUndefOrInRange(M, HalfSize, HalfSize, l, l+HalfSize)) {
5951 return MatchA && MatchB;
5954 /// LowerVECTOR_SHUFFLE_256 - Handle all 256-bit wide vectors shuffles
5955 /// which could not be matched by any known target speficic shuffle
5957 LowerVECTOR_SHUFFLE_256(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG) {
5958 if (areShuffleHalvesWithinDisjointLanes(SVOp)) {
5959 // If each half of a vector shuffle node referes to only one lane in the
5960 // source vectors, extract each used 128-bit lane and shuffle them using
5961 // 128-bit shuffles. Then, concatenate the results. Otherwise leave
5962 // the work to the legalizer.
5963 DebugLoc dl = SVOp->getDebugLoc();
5964 EVT VT = SVOp->getValueType(0);
5965 int NumElems = VT.getVectorNumElements();
5966 int HalfSize = NumElems/2;
5968 // Extract the reference for each half
5969 int FstVecExtractIdx = 0, SndVecExtractIdx = 0;
5970 int FstVecOpNum = 0, SndVecOpNum = 0;
5971 for (int i = 0; i < HalfSize; ++i) {
5972 int Elt = SVOp->getMaskElt(i);
5973 if (SVOp->getMaskElt(i) < 0)
5975 FstVecOpNum = Elt/NumElems;
5976 FstVecExtractIdx = Elt % NumElems < HalfSize ? 0 : HalfSize;
5979 for (int i = HalfSize; i < NumElems; ++i) {
5980 int Elt = SVOp->getMaskElt(i);
5981 if (SVOp->getMaskElt(i) < 0)
5983 SndVecOpNum = Elt/NumElems;
5984 SndVecExtractIdx = Elt % NumElems < HalfSize ? 0 : HalfSize;
5988 // Extract the subvectors
5989 SDValue V1 = Extract128BitVector(SVOp->getOperand(FstVecOpNum),
5990 DAG.getConstant(FstVecExtractIdx, MVT::i32), DAG, dl);
5991 SDValue V2 = Extract128BitVector(SVOp->getOperand(SndVecOpNum),
5992 DAG.getConstant(SndVecExtractIdx, MVT::i32), DAG, dl);
5994 // Generate 128-bit shuffles
5995 SmallVector<int, 16> MaskV1, MaskV2;
5996 for (int i = 0; i < HalfSize; ++i) {
5997 int Elt = SVOp->getMaskElt(i);
5998 MaskV1.push_back(Elt < 0 ? Elt : Elt % HalfSize);
6000 for (int i = HalfSize; i < NumElems; ++i) {
6001 int Elt = SVOp->getMaskElt(i);
6002 MaskV2.push_back(Elt < 0 ? Elt : Elt % HalfSize);
6005 EVT NVT = V1.getValueType();
6006 V1 = DAG.getVectorShuffle(NVT, dl, V1, DAG.getUNDEF(NVT), &MaskV1[0]);
6007 V2 = DAG.getVectorShuffle(NVT, dl, V2, DAG.getUNDEF(NVT), &MaskV2[0]);
6009 // Concatenate the result back
6010 SDValue V = Insert128BitVector(DAG.getNode(ISD::UNDEF, dl, VT), V1,
6011 DAG.getConstant(0, MVT::i32), DAG, dl);
6012 return Insert128BitVector(V, V2, DAG.getConstant(NumElems/2, MVT::i32),
6019 /// LowerVECTOR_SHUFFLE_128v4 - Handle all 128-bit wide vectors with
6020 /// 4 elements, and match them with several different shuffle types.
6022 LowerVECTOR_SHUFFLE_128v4(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG) {
6023 SDValue V1 = SVOp->getOperand(0);
6024 SDValue V2 = SVOp->getOperand(1);
6025 DebugLoc dl = SVOp->getDebugLoc();
6026 EVT VT = SVOp->getValueType(0);
6028 assert(VT.getSizeInBits() == 128 && "Unsupported vector size");
6030 SmallVector<std::pair<int, int>, 8> Locs;
6032 SmallVector<int, 8> Mask1(4U, -1);
6033 SmallVector<int, 8> PermMask(SVOp->getMask().begin(), SVOp->getMask().end());
6037 for (unsigned i = 0; i != 4; ++i) {
6038 int Idx = PermMask[i];
6040 Locs[i] = std::make_pair(-1, -1);
6042 assert(Idx < 8 && "Invalid VECTOR_SHUFFLE index!");
6044 Locs[i] = std::make_pair(0, NumLo);
6048 Locs[i] = std::make_pair(1, NumHi);
6050 Mask1[2+NumHi] = Idx;
6056 if (NumLo <= 2 && NumHi <= 2) {
6057 // If no more than two elements come from either vector. This can be
6058 // implemented with two shuffles. First shuffle gather the elements.
6059 // The second shuffle, which takes the first shuffle as both of its
6060 // vector operands, put the elements into the right order.
6061 V1 = DAG.getVectorShuffle(VT, dl, V1, V2, &Mask1[0]);
6063 SmallVector<int, 8> Mask2(4U, -1);
6065 for (unsigned i = 0; i != 4; ++i) {
6066 if (Locs[i].first == -1)
6069 unsigned Idx = (i < 2) ? 0 : 4;
6070 Idx += Locs[i].first * 2 + Locs[i].second;
6075 return DAG.getVectorShuffle(VT, dl, V1, V1, &Mask2[0]);
6076 } else if (NumLo == 3 || NumHi == 3) {
6077 // Otherwise, we must have three elements from one vector, call it X, and
6078 // one element from the other, call it Y. First, use a shufps to build an
6079 // intermediate vector with the one element from Y and the element from X
6080 // that will be in the same half in the final destination (the indexes don't
6081 // matter). Then, use a shufps to build the final vector, taking the half
6082 // containing the element from Y from the intermediate, and the other half
6085 // Normalize it so the 3 elements come from V1.
6086 CommuteVectorShuffleMask(PermMask, 4);
6090 // Find the element from V2.
6092 for (HiIndex = 0; HiIndex < 3; ++HiIndex) {
6093 int Val = PermMask[HiIndex];
6100 Mask1[0] = PermMask[HiIndex];
6102 Mask1[2] = PermMask[HiIndex^1];
6104 V2 = DAG.getVectorShuffle(VT, dl, V1, V2, &Mask1[0]);
6107 Mask1[0] = PermMask[0];
6108 Mask1[1] = PermMask[1];
6109 Mask1[2] = HiIndex & 1 ? 6 : 4;
6110 Mask1[3] = HiIndex & 1 ? 4 : 6;
6111 return DAG.getVectorShuffle(VT, dl, V1, V2, &Mask1[0]);
6113 Mask1[0] = HiIndex & 1 ? 2 : 0;
6114 Mask1[1] = HiIndex & 1 ? 0 : 2;
6115 Mask1[2] = PermMask[2];
6116 Mask1[3] = PermMask[3];
6121 return DAG.getVectorShuffle(VT, dl, V2, V1, &Mask1[0]);
6125 // Break it into (shuffle shuffle_hi, shuffle_lo).
6128 SmallVector<int,8> LoMask(4U, -1);
6129 SmallVector<int,8> HiMask(4U, -1);
6131 SmallVector<int,8> *MaskPtr = &LoMask;
6132 unsigned MaskIdx = 0;
6135 for (unsigned i = 0; i != 4; ++i) {
6142 int Idx = PermMask[i];
6144 Locs[i] = std::make_pair(-1, -1);
6145 } else if (Idx < 4) {
6146 Locs[i] = std::make_pair(MaskIdx, LoIdx);
6147 (*MaskPtr)[LoIdx] = Idx;
6150 Locs[i] = std::make_pair(MaskIdx, HiIdx);
6151 (*MaskPtr)[HiIdx] = Idx;
6156 SDValue LoShuffle = DAG.getVectorShuffle(VT, dl, V1, V2, &LoMask[0]);
6157 SDValue HiShuffle = DAG.getVectorShuffle(VT, dl, V1, V2, &HiMask[0]);
6158 SmallVector<int, 8> MaskOps;
6159 for (unsigned i = 0; i != 4; ++i) {
6160 if (Locs[i].first == -1) {
6161 MaskOps.push_back(-1);
6163 unsigned Idx = Locs[i].first * 4 + Locs[i].second;
6164 MaskOps.push_back(Idx);
6167 return DAG.getVectorShuffle(VT, dl, LoShuffle, HiShuffle, &MaskOps[0]);
6170 static bool MayFoldVectorLoad(SDValue V) {
6171 if (V.hasOneUse() && V.getOpcode() == ISD::BITCAST)
6172 V = V.getOperand(0);
6173 if (V.hasOneUse() && V.getOpcode() == ISD::SCALAR_TO_VECTOR)
6174 V = V.getOperand(0);
6175 if (V.hasOneUse() && V.getOpcode() == ISD::BUILD_VECTOR &&
6176 V.getNumOperands() == 2 && V.getOperand(1).getOpcode() == ISD::UNDEF)
6177 // BUILD_VECTOR (load), undef
6178 V = V.getOperand(0);
6184 // FIXME: the version above should always be used. Since there's
6185 // a bug where several vector shuffles can't be folded because the
6186 // DAG is not updated during lowering and a node claims to have two
6187 // uses while it only has one, use this version, and let isel match
6188 // another instruction if the load really happens to have more than
6189 // one use. Remove this version after this bug get fixed.
6190 // rdar://8434668, PR8156
6191 static bool RelaxedMayFoldVectorLoad(SDValue V) {
6192 if (V.hasOneUse() && V.getOpcode() == ISD::BITCAST)
6193 V = V.getOperand(0);
6194 if (V.hasOneUse() && V.getOpcode() == ISD::SCALAR_TO_VECTOR)
6195 V = V.getOperand(0);
6196 if (ISD::isNormalLoad(V.getNode()))
6201 /// CanFoldShuffleIntoVExtract - Check if the current shuffle is used by
6202 /// a vector extract, and if both can be later optimized into a single load.
6203 /// This is done in visitEXTRACT_VECTOR_ELT and the conditions are checked
6204 /// here because otherwise a target specific shuffle node is going to be
6205 /// emitted for this shuffle, and the optimization not done.
6206 /// FIXME: This is probably not the best approach, but fix the problem
6207 /// until the right path is decided.
6209 bool CanXFormVExtractWithShuffleIntoLoad(SDValue V, SelectionDAG &DAG,
6210 const TargetLowering &TLI) {
6211 EVT VT = V.getValueType();
6212 ShuffleVectorSDNode *SVOp = dyn_cast<ShuffleVectorSDNode>(V);
6214 // Be sure that the vector shuffle is present in a pattern like this:
6215 // (vextract (v4f32 shuffle (load $addr), <1,u,u,u>), c) -> (f32 load $addr)
6219 SDNode *N = *V.getNode()->use_begin();
6220 if (N->getOpcode() != ISD::EXTRACT_VECTOR_ELT)
6223 SDValue EltNo = N->getOperand(1);
6224 if (!isa<ConstantSDNode>(EltNo))
6227 // If the bit convert changed the number of elements, it is unsafe
6228 // to examine the mask.
6229 bool HasShuffleIntoBitcast = false;
6230 if (V.getOpcode() == ISD::BITCAST) {
6231 EVT SrcVT = V.getOperand(0).getValueType();
6232 if (SrcVT.getVectorNumElements() != VT.getVectorNumElements())
6234 V = V.getOperand(0);
6235 HasShuffleIntoBitcast = true;
6238 // Select the input vector, guarding against out of range extract vector.
6239 unsigned NumElems = VT.getVectorNumElements();
6240 unsigned Elt = cast<ConstantSDNode>(EltNo)->getZExtValue();
6241 int Idx = (Elt > NumElems) ? -1 : SVOp->getMaskElt(Elt);
6242 V = (Idx < (int)NumElems) ? V.getOperand(0) : V.getOperand(1);
6244 // If we are accessing the upper part of a YMM register
6245 // then the EXTRACT_VECTOR_ELT is likely to be legalized to a sequence of
6246 // EXTRACT_SUBVECTOR + EXTRACT_VECTOR_ELT, which are not detected at this point
6247 // because the legalization of N did not happen yet.
6248 if (Idx >= NumElems/2 && VT.getSizeInBits() == 256)
6251 // Skip one more bit_convert if necessary
6252 if (V.getOpcode() == ISD::BITCAST)
6253 V = V.getOperand(0);
6255 if (!ISD::isNormalLoad(V.getNode()))
6258 // Is the original load suitable?
6259 LoadSDNode *LN0 = cast<LoadSDNode>(V);
6261 if (!LN0 || !LN0->hasNUsesOfValue(1,0) || LN0->isVolatile())
6264 if (!HasShuffleIntoBitcast)
6267 // If there's a bitcast before the shuffle, check if the load type and
6268 // alignment is valid.
6269 unsigned Align = LN0->getAlignment();
6271 TLI.getTargetData()->getABITypeAlignment(
6272 VT.getTypeForEVT(*DAG.getContext()));
6274 if (NewAlign > Align || !TLI.isOperationLegalOrCustom(ISD::LOAD, VT))
6281 SDValue getMOVDDup(SDValue &Op, DebugLoc &dl, SDValue V1, SelectionDAG &DAG) {
6282 EVT VT = Op.getValueType();
6284 // Canonizalize to v2f64.
6285 V1 = DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, V1);
6286 return DAG.getNode(ISD::BITCAST, dl, VT,
6287 getTargetShuffleNode(X86ISD::MOVDDUP, dl, MVT::v2f64,
6292 SDValue getMOVLowToHigh(SDValue &Op, DebugLoc &dl, SelectionDAG &DAG,
6294 SDValue V1 = Op.getOperand(0);
6295 SDValue V2 = Op.getOperand(1);
6296 EVT VT = Op.getValueType();
6298 assert(VT != MVT::v2i64 && "unsupported shuffle type");
6300 if (HasSSE2 && VT == MVT::v2f64)
6301 return getTargetShuffleNode(X86ISD::MOVLHPD, dl, VT, V1, V2, DAG);
6303 // v4f32 or v4i32: canonizalized to v4f32 (which is legal for SSE1)
6304 return DAG.getNode(ISD::BITCAST, dl, VT,
6305 getTargetShuffleNode(X86ISD::MOVLHPS, dl, MVT::v4f32,
6306 DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, V1),
6307 DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, V2), DAG));
6311 SDValue getMOVHighToLow(SDValue &Op, DebugLoc &dl, SelectionDAG &DAG) {
6312 SDValue V1 = Op.getOperand(0);
6313 SDValue V2 = Op.getOperand(1);
6314 EVT VT = Op.getValueType();
6316 assert((VT == MVT::v4i32 || VT == MVT::v4f32) &&
6317 "unsupported shuffle type");
6319 if (V2.getOpcode() == ISD::UNDEF)
6323 return getTargetShuffleNode(X86ISD::MOVHLPS, dl, VT, V1, V2, DAG);
6327 SDValue getMOVLP(SDValue &Op, DebugLoc &dl, SelectionDAG &DAG, bool HasSSE2) {
6328 SDValue V1 = Op.getOperand(0);
6329 SDValue V2 = Op.getOperand(1);
6330 EVT VT = Op.getValueType();
6331 unsigned NumElems = VT.getVectorNumElements();
6333 // Use MOVLPS and MOVLPD in case V1 or V2 are loads. During isel, the second
6334 // operand of these instructions is only memory, so check if there's a
6335 // potencial load folding here, otherwise use SHUFPS or MOVSD to match the
6337 bool CanFoldLoad = false;
6339 // Trivial case, when V2 comes from a load.
6340 if (MayFoldVectorLoad(V2))
6343 // When V1 is a load, it can be folded later into a store in isel, example:
6344 // (store (v4f32 (X86Movlps (load addr:$src1), VR128:$src2)), addr:$src1)
6346 // (MOVLPSmr addr:$src1, VR128:$src2)
6347 // So, recognize this potential and also use MOVLPS or MOVLPD
6348 else if (MayFoldVectorLoad(V1) && MayFoldIntoStore(Op))
6351 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
6353 if (HasSSE2 && NumElems == 2)
6354 return getTargetShuffleNode(X86ISD::MOVLPD, dl, VT, V1, V2, DAG);
6357 // If we don't care about the second element, procede to use movss.
6358 if (SVOp->getMaskElt(1) != -1)
6359 return getTargetShuffleNode(X86ISD::MOVLPS, dl, VT, V1, V2, DAG);
6362 // movl and movlp will both match v2i64, but v2i64 is never matched by
6363 // movl earlier because we make it strict to avoid messing with the movlp load
6364 // folding logic (see the code above getMOVLP call). Match it here then,
6365 // this is horrible, but will stay like this until we move all shuffle
6366 // matching to x86 specific nodes. Note that for the 1st condition all
6367 // types are matched with movsd.
6369 // FIXME: isMOVLMask should be checked and matched before getMOVLP,
6370 // as to remove this logic from here, as much as possible
6371 if (NumElems == 2 || !X86::isMOVLMask(SVOp))
6372 return getTargetShuffleNode(X86ISD::MOVSD, dl, VT, V1, V2, DAG);
6373 return getTargetShuffleNode(X86ISD::MOVSS, dl, VT, V1, V2, DAG);
6376 assert(VT != MVT::v4i32 && "unsupported shuffle type");
6378 // Invert the operand order and use SHUFPS to match it.
6379 return getTargetShuffleNode(X86ISD::SHUFP, dl, VT, V2, V1,
6380 X86::getShuffleSHUFImmediate(SVOp), DAG);
6384 SDValue NormalizeVectorShuffle(SDValue Op, SelectionDAG &DAG,
6385 const TargetLowering &TLI,
6386 const X86Subtarget *Subtarget) {
6387 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
6388 EVT VT = Op.getValueType();
6389 DebugLoc dl = Op.getDebugLoc();
6390 SDValue V1 = Op.getOperand(0);
6391 SDValue V2 = Op.getOperand(1);
6393 if (isZeroShuffle(SVOp))
6394 return getZeroVector(VT, Subtarget->hasSSE2(), Subtarget->hasAVX2(),
6397 // Handle splat operations
6398 if (SVOp->isSplat()) {
6399 unsigned NumElem = VT.getVectorNumElements();
6400 int Size = VT.getSizeInBits();
6401 // Special case, this is the only place now where it's allowed to return
6402 // a vector_shuffle operation without using a target specific node, because
6403 // *hopefully* it will be optimized away by the dag combiner. FIXME: should
6404 // this be moved to DAGCombine instead?
6405 if (NumElem <= 4 && CanXFormVExtractWithShuffleIntoLoad(Op, DAG, TLI))
6408 // Use vbroadcast whenever the splat comes from a foldable load
6409 SDValue LD = isVectorBroadcast(Op, Subtarget);
6411 return DAG.getNode(X86ISD::VBROADCAST, dl, VT, LD);
6413 // Handle splats by matching through known shuffle masks
6414 if ((Size == 128 && NumElem <= 4) ||
6415 (Size == 256 && NumElem < 8))
6418 // All remaning splats are promoted to target supported vector shuffles.
6419 return PromoteSplat(SVOp, DAG);
6422 // If the shuffle can be profitably rewritten as a narrower shuffle, then
6424 if (VT == MVT::v8i16 || VT == MVT::v16i8) {
6425 SDValue NewOp = RewriteAsNarrowerShuffle(SVOp, DAG, dl);
6426 if (NewOp.getNode())
6427 return DAG.getNode(ISD::BITCAST, dl, VT, NewOp);
6428 } else if ((VT == MVT::v4i32 ||
6429 (VT == MVT::v4f32 && Subtarget->hasSSE2()))) {
6430 // FIXME: Figure out a cleaner way to do this.
6431 // Try to make use of movq to zero out the top part.
6432 if (ISD::isBuildVectorAllZeros(V2.getNode())) {
6433 SDValue NewOp = RewriteAsNarrowerShuffle(SVOp, DAG, dl);
6434 if (NewOp.getNode()) {
6435 if (isCommutedMOVL(cast<ShuffleVectorSDNode>(NewOp), true, false))
6436 return getVZextMovL(VT, NewOp.getValueType(), NewOp.getOperand(0),
6437 DAG, Subtarget, dl);
6439 } else if (ISD::isBuildVectorAllZeros(V1.getNode())) {
6440 SDValue NewOp = RewriteAsNarrowerShuffle(SVOp, DAG, dl);
6441 if (NewOp.getNode() && X86::isMOVLMask(cast<ShuffleVectorSDNode>(NewOp)))
6442 return getVZextMovL(VT, NewOp.getValueType(), NewOp.getOperand(1),
6443 DAG, Subtarget, dl);
6450 X86TargetLowering::LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) const {
6451 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
6452 SDValue V1 = Op.getOperand(0);
6453 SDValue V2 = Op.getOperand(1);
6454 EVT VT = Op.getValueType();
6455 DebugLoc dl = Op.getDebugLoc();
6456 unsigned NumElems = VT.getVectorNumElements();
6457 bool V1IsUndef = V1.getOpcode() == ISD::UNDEF;
6458 bool V2IsUndef = V2.getOpcode() == ISD::UNDEF;
6459 bool V1IsSplat = false;
6460 bool V2IsSplat = false;
6461 bool HasSSE2 = Subtarget->hasSSE2();
6462 bool HasAVX = Subtarget->hasAVX();
6463 bool HasAVX2 = Subtarget->hasAVX2();
6464 MachineFunction &MF = DAG.getMachineFunction();
6465 bool OptForSize = MF.getFunction()->hasFnAttr(Attribute::OptimizeForSize);
6467 assert(VT.getSizeInBits() != 64 && "Can't lower MMX shuffles");
6469 if (V1IsUndef && V2IsUndef)
6470 return DAG.getUNDEF(VT);
6472 assert(!V1IsUndef && "Op 1 of shuffle should not be undef");
6474 // Vector shuffle lowering takes 3 steps:
6476 // 1) Normalize the input vectors. Here splats, zeroed vectors, profitable
6477 // narrowing and commutation of operands should be handled.
6478 // 2) Matching of shuffles with known shuffle masks to x86 target specific
6480 // 3) Rewriting of unmatched masks into new generic shuffle operations,
6481 // so the shuffle can be broken into other shuffles and the legalizer can
6482 // try the lowering again.
6484 // The general idea is that no vector_shuffle operation should be left to
6485 // be matched during isel, all of them must be converted to a target specific
6488 // Normalize the input vectors. Here splats, zeroed vectors, profitable
6489 // narrowing and commutation of operands should be handled. The actual code
6490 // doesn't include all of those, work in progress...
6491 SDValue NewOp = NormalizeVectorShuffle(Op, DAG, *this, Subtarget);
6492 if (NewOp.getNode())
6495 // NOTE: isPSHUFDMask can also match both masks below (unpckl_undef and
6496 // unpckh_undef). Only use pshufd if speed is more important than size.
6497 if (OptForSize && X86::isUNPCKL_v_undef_Mask(SVOp, HasAVX2))
6498 return getTargetShuffleNode(X86ISD::UNPCKL, dl, VT, V1, V1, DAG);
6499 if (OptForSize && X86::isUNPCKH_v_undef_Mask(SVOp, HasAVX2))
6500 return getTargetShuffleNode(X86ISD::UNPCKH, dl, VT, V1, V1, DAG);
6502 if (X86::isMOVDDUPMask(SVOp) && Subtarget->hasSSE3() &&
6503 V2IsUndef && RelaxedMayFoldVectorLoad(V1))
6504 return getMOVDDup(Op, dl, V1, DAG);
6506 if (X86::isMOVHLPS_v_undef_Mask(SVOp))
6507 return getMOVHighToLow(Op, dl, DAG);
6509 // Use to match splats
6510 if (HasSSE2 && X86::isUNPCKHMask(SVOp, HasAVX2) && V2IsUndef &&
6511 (VT == MVT::v2f64 || VT == MVT::v2i64))
6512 return getTargetShuffleNode(X86ISD::UNPCKH, dl, VT, V1, V1, DAG);
6514 if (X86::isPSHUFDMask(SVOp)) {
6515 // The actual implementation will match the mask in the if above and then
6516 // during isel it can match several different instructions, not only pshufd
6517 // as its name says, sad but true, emulate the behavior for now...
6518 if (X86::isMOVDDUPMask(SVOp) && ((VT == MVT::v4f32 || VT == MVT::v2i64)))
6519 return getTargetShuffleNode(X86ISD::MOVLHPS, dl, VT, V1, V1, DAG);
6521 unsigned TargetMask = X86::getShuffleSHUFImmediate(SVOp);
6523 if (HasSSE2 && (VT == MVT::v4f32 || VT == MVT::v4i32))
6524 return getTargetShuffleNode(X86ISD::PSHUFD, dl, VT, V1, TargetMask, DAG);
6526 return getTargetShuffleNode(X86ISD::SHUFP, dl, VT, V1, V1,
6530 // Check if this can be converted into a logical shift.
6531 bool isLeft = false;
6534 bool isShift = HasSSE2 && isVectorShift(SVOp, DAG, isLeft, ShVal, ShAmt);
6535 if (isShift && ShVal.hasOneUse()) {
6536 // If the shifted value has multiple uses, it may be cheaper to use
6537 // v_set0 + movlhps or movhlps, etc.
6538 EVT EltVT = VT.getVectorElementType();
6539 ShAmt *= EltVT.getSizeInBits();
6540 return getVShift(isLeft, VT, ShVal, ShAmt, DAG, *this, dl);
6543 if (X86::isMOVLMask(SVOp)) {
6544 if (ISD::isBuildVectorAllZeros(V1.getNode()))
6545 return getVZextMovL(VT, VT, V2, DAG, Subtarget, dl);
6546 if (!X86::isMOVLPMask(SVOp)) {
6547 if (HasSSE2 && (VT == MVT::v2i64 || VT == MVT::v2f64))
6548 return getTargetShuffleNode(X86ISD::MOVSD, dl, VT, V1, V2, DAG);
6550 if (VT == MVT::v4i32 || VT == MVT::v4f32)
6551 return getTargetShuffleNode(X86ISD::MOVSS, dl, VT, V1, V2, DAG);
6555 // FIXME: fold these into legal mask.
6556 if (X86::isMOVLHPSMask(SVOp) && !X86::isUNPCKLMask(SVOp, HasAVX2))
6557 return getMOVLowToHigh(Op, dl, DAG, HasSSE2);
6559 if (X86::isMOVHLPSMask(SVOp))
6560 return getMOVHighToLow(Op, dl, DAG);
6562 if (X86::isMOVSHDUPMask(SVOp, Subtarget))
6563 return getTargetShuffleNode(X86ISD::MOVSHDUP, dl, VT, V1, DAG);
6565 if (X86::isMOVSLDUPMask(SVOp, Subtarget))
6566 return getTargetShuffleNode(X86ISD::MOVSLDUP, dl, VT, V1, DAG);
6568 if (X86::isMOVLPMask(SVOp))
6569 return getMOVLP(Op, dl, DAG, HasSSE2);
6571 if (ShouldXformToMOVHLPS(SVOp) ||
6572 ShouldXformToMOVLP(V1.getNode(), V2.getNode(), SVOp))
6573 return CommuteVectorShuffle(SVOp, DAG);
6576 // No better options. Use a vshl / vsrl.
6577 EVT EltVT = VT.getVectorElementType();
6578 ShAmt *= EltVT.getSizeInBits();
6579 return getVShift(isLeft, VT, ShVal, ShAmt, DAG, *this, dl);
6582 bool Commuted = false;
6583 // FIXME: This should also accept a bitcast of a splat? Be careful, not
6584 // 1,1,1,1 -> v8i16 though.
6585 V1IsSplat = isSplatVector(V1.getNode());
6586 V2IsSplat = isSplatVector(V2.getNode());
6588 // Canonicalize the splat or undef, if present, to be on the RHS.
6589 if (V1IsSplat && !V2IsSplat) {
6590 Op = CommuteVectorShuffle(SVOp, DAG);
6591 SVOp = cast<ShuffleVectorSDNode>(Op);
6592 V1 = SVOp->getOperand(0);
6593 V2 = SVOp->getOperand(1);
6594 std::swap(V1IsSplat, V2IsSplat);
6598 ArrayRef<int> M = SVOp->getMask();
6600 if (isCommutedMOVLMask(M, VT, V2IsSplat, V2IsUndef)) {
6601 // Shuffling low element of v1 into undef, just return v1.
6604 // If V2 is a splat, the mask may be malformed such as <4,3,3,3>, which
6605 // the instruction selector will not match, so get a canonical MOVL with
6606 // swapped operands to undo the commute.
6607 return getMOVL(DAG, dl, VT, V2, V1);
6610 if (isUNPCKLMask(M, VT, HasAVX2))
6611 return getTargetShuffleNode(X86ISD::UNPCKL, dl, VT, V1, V2, DAG);
6613 if (isUNPCKHMask(M, VT, HasAVX2))
6614 return getTargetShuffleNode(X86ISD::UNPCKH, dl, VT, V1, V2, DAG);
6617 // Normalize mask so all entries that point to V2 points to its first
6618 // element then try to match unpck{h|l} again. If match, return a
6619 // new vector_shuffle with the corrected mask.
6620 SDValue NewMask = NormalizeMask(SVOp, DAG);
6621 ShuffleVectorSDNode *NSVOp = cast<ShuffleVectorSDNode>(NewMask);
6622 if (NSVOp != SVOp) {
6623 if (X86::isUNPCKLMask(NSVOp, HasAVX2, true)) {
6625 } else if (X86::isUNPCKHMask(NSVOp, HasAVX2, true)) {
6632 // Commute is back and try unpck* again.
6633 // FIXME: this seems wrong.
6634 SDValue NewOp = CommuteVectorShuffle(SVOp, DAG);
6635 ShuffleVectorSDNode *NewSVOp = cast<ShuffleVectorSDNode>(NewOp);
6637 if (X86::isUNPCKLMask(NewSVOp, HasAVX2))
6638 return getTargetShuffleNode(X86ISD::UNPCKL, dl, VT, V2, V1, DAG);
6640 if (X86::isUNPCKHMask(NewSVOp, HasAVX2))
6641 return getTargetShuffleNode(X86ISD::UNPCKH, dl, VT, V2, V1, DAG);
6644 // Normalize the node to match x86 shuffle ops if needed
6645 if (!V2IsUndef && (isSHUFPMask(M, VT, /* Commuted */ true) ||
6646 isVSHUFPYMask(M, VT, HasAVX, /* Commuted */ true)))
6647 return CommuteVectorShuffle(SVOp, DAG);
6649 // The checks below are all present in isShuffleMaskLegal, but they are
6650 // inlined here right now to enable us to directly emit target specific
6651 // nodes, and remove one by one until they don't return Op anymore.
6653 if (isPALIGNRMask(M, VT, Subtarget->hasSSSE3()))
6654 return getTargetShuffleNode(X86ISD::PALIGN, dl, VT, V1, V2,
6655 getShufflePALIGNRImmediate(SVOp),
6658 if (ShuffleVectorSDNode::isSplatMask(&M[0], VT) &&
6659 SVOp->getSplatIndex() == 0 && V2IsUndef) {
6660 if (VT == MVT::v2f64 || VT == MVT::v2i64)
6661 return getTargetShuffleNode(X86ISD::UNPCKL, dl, VT, V1, V1, DAG);
6664 if (isPSHUFHWMask(M, VT))
6665 return getTargetShuffleNode(X86ISD::PSHUFHW, dl, VT, V1,
6666 X86::getShufflePSHUFHWImmediate(SVOp),
6669 if (isPSHUFLWMask(M, VT))
6670 return getTargetShuffleNode(X86ISD::PSHUFLW, dl, VT, V1,
6671 X86::getShufflePSHUFLWImmediate(SVOp),
6674 if (isSHUFPMask(M, VT))
6675 return getTargetShuffleNode(X86ISD::SHUFP, dl, VT, V1, V2,
6676 X86::getShuffleSHUFImmediate(SVOp), DAG);
6678 if (isUNPCKL_v_undef_Mask(M, VT, HasAVX2))
6679 return getTargetShuffleNode(X86ISD::UNPCKL, dl, VT, V1, V1, DAG);
6680 if (isUNPCKH_v_undef_Mask(M, VT, HasAVX2))
6681 return getTargetShuffleNode(X86ISD::UNPCKH, dl, VT, V1, V1, DAG);
6683 //===--------------------------------------------------------------------===//
6684 // Generate target specific nodes for 128 or 256-bit shuffles only
6685 // supported in the AVX instruction set.
6688 // Handle VMOVDDUPY permutations
6689 if (V2IsUndef && isMOVDDUPYMask(M, VT, HasAVX))
6690 return getTargetShuffleNode(X86ISD::MOVDDUP, dl, VT, V1, DAG);
6692 // Handle VPERMILPS/D* permutations
6693 if (isVPERMILPMask(M, VT, HasAVX))
6694 return getTargetShuffleNode(X86ISD::VPERMILP, dl, VT, V1,
6695 getShuffleVPERMILPImmediate(SVOp), DAG);
6697 // Handle VPERM2F128/VPERM2I128 permutations
6698 if (isVPERM2X128Mask(M, VT, HasAVX))
6699 return getTargetShuffleNode(X86ISD::VPERM2X128, dl, VT, V1,
6700 V2, getShuffleVPERM2X128Immediate(SVOp), DAG);
6702 // Handle VSHUFPS/DY permutations
6703 if (isVSHUFPYMask(M, VT, HasAVX))
6704 return getTargetShuffleNode(X86ISD::SHUFP, dl, VT, V1, V2,
6705 getShuffleVSHUFPYImmediate(SVOp), DAG);
6707 //===--------------------------------------------------------------------===//
6708 // Since no target specific shuffle was selected for this generic one,
6709 // lower it into other known shuffles. FIXME: this isn't true yet, but
6710 // this is the plan.
6713 // Handle v8i16 specifically since SSE can do byte extraction and insertion.
6714 if (VT == MVT::v8i16) {
6715 SDValue NewOp = LowerVECTOR_SHUFFLEv8i16(Op, DAG);
6716 if (NewOp.getNode())
6720 if (VT == MVT::v16i8) {
6721 SDValue NewOp = LowerVECTOR_SHUFFLEv16i8(SVOp, DAG, *this);
6722 if (NewOp.getNode())
6726 // Handle all 128-bit wide vectors with 4 elements, and match them with
6727 // several different shuffle types.
6728 if (NumElems == 4 && VT.getSizeInBits() == 128)
6729 return LowerVECTOR_SHUFFLE_128v4(SVOp, DAG);
6731 // Handle general 256-bit shuffles
6732 if (VT.is256BitVector())
6733 return LowerVECTOR_SHUFFLE_256(SVOp, DAG);
6739 X86TargetLowering::LowerEXTRACT_VECTOR_ELT_SSE4(SDValue Op,
6740 SelectionDAG &DAG) const {
6741 EVT VT = Op.getValueType();
6742 DebugLoc dl = Op.getDebugLoc();
6744 if (Op.getOperand(0).getValueType().getSizeInBits() != 128)
6747 if (VT.getSizeInBits() == 8) {
6748 SDValue Extract = DAG.getNode(X86ISD::PEXTRB, dl, MVT::i32,
6749 Op.getOperand(0), Op.getOperand(1));
6750 SDValue Assert = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Extract,
6751 DAG.getValueType(VT));
6752 return DAG.getNode(ISD::TRUNCATE, dl, VT, Assert);
6753 } else if (VT.getSizeInBits() == 16) {
6754 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
6755 // If Idx is 0, it's cheaper to do a move instead of a pextrw.
6757 return DAG.getNode(ISD::TRUNCATE, dl, MVT::i16,
6758 DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32,
6759 DAG.getNode(ISD::BITCAST, dl,
6763 SDValue Extract = DAG.getNode(X86ISD::PEXTRW, dl, MVT::i32,
6764 Op.getOperand(0), Op.getOperand(1));
6765 SDValue Assert = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Extract,
6766 DAG.getValueType(VT));
6767 return DAG.getNode(ISD::TRUNCATE, dl, VT, Assert);
6768 } else if (VT == MVT::f32) {
6769 // EXTRACTPS outputs to a GPR32 register which will require a movd to copy
6770 // the result back to FR32 register. It's only worth matching if the
6771 // result has a single use which is a store or a bitcast to i32. And in
6772 // the case of a store, it's not worth it if the index is a constant 0,
6773 // because a MOVSSmr can be used instead, which is smaller and faster.
6774 if (!Op.hasOneUse())
6776 SDNode *User = *Op.getNode()->use_begin();
6777 if ((User->getOpcode() != ISD::STORE ||
6778 (isa<ConstantSDNode>(Op.getOperand(1)) &&
6779 cast<ConstantSDNode>(Op.getOperand(1))->isNullValue())) &&
6780 (User->getOpcode() != ISD::BITCAST ||
6781 User->getValueType(0) != MVT::i32))
6783 SDValue Extract = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32,
6784 DAG.getNode(ISD::BITCAST, dl, MVT::v4i32,
6787 return DAG.getNode(ISD::BITCAST, dl, MVT::f32, Extract);
6788 } else if (VT == MVT::i32 || VT == MVT::i64) {
6789 // ExtractPS/pextrq works with constant index.
6790 if (isa<ConstantSDNode>(Op.getOperand(1)))
6798 X86TargetLowering::LowerEXTRACT_VECTOR_ELT(SDValue Op,
6799 SelectionDAG &DAG) const {
6800 if (!isa<ConstantSDNode>(Op.getOperand(1)))
6803 SDValue Vec = Op.getOperand(0);
6804 EVT VecVT = Vec.getValueType();
6806 // If this is a 256-bit vector result, first extract the 128-bit vector and
6807 // then extract the element from the 128-bit vector.
6808 if (VecVT.getSizeInBits() == 256) {
6809 DebugLoc dl = Op.getNode()->getDebugLoc();
6810 unsigned NumElems = VecVT.getVectorNumElements();
6811 SDValue Idx = Op.getOperand(1);
6812 unsigned IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
6814 // Get the 128-bit vector.
6815 bool Upper = IdxVal >= NumElems/2;
6816 Vec = Extract128BitVector(Vec,
6817 DAG.getConstant(Upper ? NumElems/2 : 0, MVT::i32), DAG, dl);
6819 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, Op.getValueType(), Vec,
6820 Upper ? DAG.getConstant(IdxVal-NumElems/2, MVT::i32) : Idx);
6823 assert(Vec.getValueSizeInBits() <= 128 && "Unexpected vector length");
6825 if (Subtarget->hasSSE41()) {
6826 SDValue Res = LowerEXTRACT_VECTOR_ELT_SSE4(Op, DAG);
6831 EVT VT = Op.getValueType();
6832 DebugLoc dl = Op.getDebugLoc();
6833 // TODO: handle v16i8.
6834 if (VT.getSizeInBits() == 16) {
6835 SDValue Vec = Op.getOperand(0);
6836 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
6838 return DAG.getNode(ISD::TRUNCATE, dl, MVT::i16,
6839 DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32,
6840 DAG.getNode(ISD::BITCAST, dl,
6843 // Transform it so it match pextrw which produces a 32-bit result.
6844 EVT EltVT = MVT::i32;
6845 SDValue Extract = DAG.getNode(X86ISD::PEXTRW, dl, EltVT,
6846 Op.getOperand(0), Op.getOperand(1));
6847 SDValue Assert = DAG.getNode(ISD::AssertZext, dl, EltVT, Extract,
6848 DAG.getValueType(VT));
6849 return DAG.getNode(ISD::TRUNCATE, dl, VT, Assert);
6850 } else if (VT.getSizeInBits() == 32) {
6851 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
6855 // SHUFPS the element to the lowest double word, then movss.
6856 int Mask[4] = { static_cast<int>(Idx), -1, -1, -1 };
6857 EVT VVT = Op.getOperand(0).getValueType();
6858 SDValue Vec = DAG.getVectorShuffle(VVT, dl, Op.getOperand(0),
6859 DAG.getUNDEF(VVT), Mask);
6860 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, VT, Vec,
6861 DAG.getIntPtrConstant(0));
6862 } else if (VT.getSizeInBits() == 64) {
6863 // FIXME: .td only matches this for <2 x f64>, not <2 x i64> on 32b
6864 // FIXME: seems like this should be unnecessary if mov{h,l}pd were taught
6865 // to match extract_elt for f64.
6866 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
6870 // UNPCKHPD the element to the lowest double word, then movsd.
6871 // Note if the lower 64 bits of the result of the UNPCKHPD is then stored
6872 // to a f64mem, the whole operation is folded into a single MOVHPDmr.
6873 int Mask[2] = { 1, -1 };
6874 EVT VVT = Op.getOperand(0).getValueType();
6875 SDValue Vec = DAG.getVectorShuffle(VVT, dl, Op.getOperand(0),
6876 DAG.getUNDEF(VVT), Mask);
6877 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, VT, Vec,
6878 DAG.getIntPtrConstant(0));
6885 X86TargetLowering::LowerINSERT_VECTOR_ELT_SSE4(SDValue Op,
6886 SelectionDAG &DAG) const {
6887 EVT VT = Op.getValueType();
6888 EVT EltVT = VT.getVectorElementType();
6889 DebugLoc dl = Op.getDebugLoc();
6891 SDValue N0 = Op.getOperand(0);
6892 SDValue N1 = Op.getOperand(1);
6893 SDValue N2 = Op.getOperand(2);
6895 if (VT.getSizeInBits() == 256)
6898 if ((EltVT.getSizeInBits() == 8 || EltVT.getSizeInBits() == 16) &&
6899 isa<ConstantSDNode>(N2)) {
6901 if (VT == MVT::v8i16)
6902 Opc = X86ISD::PINSRW;
6903 else if (VT == MVT::v16i8)
6904 Opc = X86ISD::PINSRB;
6906 Opc = X86ISD::PINSRB;
6908 // Transform it so it match pinsr{b,w} which expects a GR32 as its second
6910 if (N1.getValueType() != MVT::i32)
6911 N1 = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, N1);
6912 if (N2.getValueType() != MVT::i32)
6913 N2 = DAG.getIntPtrConstant(cast<ConstantSDNode>(N2)->getZExtValue());
6914 return DAG.getNode(Opc, dl, VT, N0, N1, N2);
6915 } else if (EltVT == MVT::f32 && isa<ConstantSDNode>(N2)) {
6916 // Bits [7:6] of the constant are the source select. This will always be
6917 // zero here. The DAG Combiner may combine an extract_elt index into these
6918 // bits. For example (insert (extract, 3), 2) could be matched by putting
6919 // the '3' into bits [7:6] of X86ISD::INSERTPS.
6920 // Bits [5:4] of the constant are the destination select. This is the
6921 // value of the incoming immediate.
6922 // Bits [3:0] of the constant are the zero mask. The DAG Combiner may
6923 // combine either bitwise AND or insert of float 0.0 to set these bits.
6924 N2 = DAG.getIntPtrConstant(cast<ConstantSDNode>(N2)->getZExtValue() << 4);
6925 // Create this as a scalar to vector..
6926 N1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4f32, N1);
6927 return DAG.getNode(X86ISD::INSERTPS, dl, VT, N0, N1, N2);
6928 } else if ((EltVT == MVT::i32 || EltVT == MVT::i64) &&
6929 isa<ConstantSDNode>(N2)) {
6930 // PINSR* works with constant index.
6937 X86TargetLowering::LowerINSERT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) const {
6938 EVT VT = Op.getValueType();
6939 EVT EltVT = VT.getVectorElementType();
6941 DebugLoc dl = Op.getDebugLoc();
6942 SDValue N0 = Op.getOperand(0);
6943 SDValue N1 = Op.getOperand(1);
6944 SDValue N2 = Op.getOperand(2);
6946 // If this is a 256-bit vector result, first extract the 128-bit vector,
6947 // insert the element into the extracted half and then place it back.
6948 if (VT.getSizeInBits() == 256) {
6949 if (!isa<ConstantSDNode>(N2))
6952 // Get the desired 128-bit vector half.
6953 unsigned NumElems = VT.getVectorNumElements();
6954 unsigned IdxVal = cast<ConstantSDNode>(N2)->getZExtValue();
6955 bool Upper = IdxVal >= NumElems/2;
6956 SDValue Ins128Idx = DAG.getConstant(Upper ? NumElems/2 : 0, MVT::i32);
6957 SDValue V = Extract128BitVector(N0, Ins128Idx, DAG, dl);
6959 // Insert the element into the desired half.
6960 V = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, V.getValueType(), V,
6961 N1, Upper ? DAG.getConstant(IdxVal-NumElems/2, MVT::i32) : N2);
6963 // Insert the changed part back to the 256-bit vector
6964 return Insert128BitVector(N0, V, Ins128Idx, DAG, dl);
6967 if (Subtarget->hasSSE41())
6968 return LowerINSERT_VECTOR_ELT_SSE4(Op, DAG);
6970 if (EltVT == MVT::i8)
6973 if (EltVT.getSizeInBits() == 16 && isa<ConstantSDNode>(N2)) {
6974 // Transform it so it match pinsrw which expects a 16-bit value in a GR32
6975 // as its second argument.
6976 if (N1.getValueType() != MVT::i32)
6977 N1 = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, N1);
6978 if (N2.getValueType() != MVT::i32)
6979 N2 = DAG.getIntPtrConstant(cast<ConstantSDNode>(N2)->getZExtValue());
6980 return DAG.getNode(X86ISD::PINSRW, dl, VT, N0, N1, N2);
6986 X86TargetLowering::LowerSCALAR_TO_VECTOR(SDValue Op, SelectionDAG &DAG) const {
6987 LLVMContext *Context = DAG.getContext();
6988 DebugLoc dl = Op.getDebugLoc();
6989 EVT OpVT = Op.getValueType();
6991 // If this is a 256-bit vector result, first insert into a 128-bit
6992 // vector and then insert into the 256-bit vector.
6993 if (OpVT.getSizeInBits() > 128) {
6994 // Insert into a 128-bit vector.
6995 EVT VT128 = EVT::getVectorVT(*Context,
6996 OpVT.getVectorElementType(),
6997 OpVT.getVectorNumElements() / 2);
6999 Op = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT128, Op.getOperand(0));
7001 // Insert the 128-bit vector.
7002 return Insert128BitVector(DAG.getNode(ISD::UNDEF, dl, OpVT), Op,
7003 DAG.getConstant(0, MVT::i32),
7007 if (Op.getValueType() == MVT::v1i64 &&
7008 Op.getOperand(0).getValueType() == MVT::i64)
7009 return DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v1i64, Op.getOperand(0));
7011 SDValue AnyExt = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, Op.getOperand(0));
7012 assert(Op.getValueType().getSimpleVT().getSizeInBits() == 128 &&
7013 "Expected an SSE type!");
7014 return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(),
7015 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32,AnyExt));
7018 // Lower a node with an EXTRACT_SUBVECTOR opcode. This may result in
7019 // a simple subregister reference or explicit instructions to grab
7020 // upper bits of a vector.
7022 X86TargetLowering::LowerEXTRACT_SUBVECTOR(SDValue Op, SelectionDAG &DAG) const {
7023 if (Subtarget->hasAVX()) {
7024 DebugLoc dl = Op.getNode()->getDebugLoc();
7025 SDValue Vec = Op.getNode()->getOperand(0);
7026 SDValue Idx = Op.getNode()->getOperand(1);
7028 if (Op.getNode()->getValueType(0).getSizeInBits() == 128
7029 && Vec.getNode()->getValueType(0).getSizeInBits() == 256) {
7030 return Extract128BitVector(Vec, Idx, DAG, dl);
7036 // Lower a node with an INSERT_SUBVECTOR opcode. This may result in a
7037 // simple superregister reference or explicit instructions to insert
7038 // the upper bits of a vector.
7040 X86TargetLowering::LowerINSERT_SUBVECTOR(SDValue Op, SelectionDAG &DAG) const {
7041 if (Subtarget->hasAVX()) {
7042 DebugLoc dl = Op.getNode()->getDebugLoc();
7043 SDValue Vec = Op.getNode()->getOperand(0);
7044 SDValue SubVec = Op.getNode()->getOperand(1);
7045 SDValue Idx = Op.getNode()->getOperand(2);
7047 if (Op.getNode()->getValueType(0).getSizeInBits() == 256
7048 && SubVec.getNode()->getValueType(0).getSizeInBits() == 128) {
7049 return Insert128BitVector(Vec, SubVec, Idx, DAG, dl);
7055 // ConstantPool, JumpTable, GlobalAddress, and ExternalSymbol are lowered as
7056 // their target countpart wrapped in the X86ISD::Wrapper node. Suppose N is
7057 // one of the above mentioned nodes. It has to be wrapped because otherwise
7058 // Select(N) returns N. So the raw TargetGlobalAddress nodes, etc. can only
7059 // be used to form addressing mode. These wrapped nodes will be selected
7062 X86TargetLowering::LowerConstantPool(SDValue Op, SelectionDAG &DAG) const {
7063 ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
7065 // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
7067 unsigned char OpFlag = 0;
7068 unsigned WrapperKind = X86ISD::Wrapper;
7069 CodeModel::Model M = getTargetMachine().getCodeModel();
7071 if (Subtarget->isPICStyleRIPRel() &&
7072 (M == CodeModel::Small || M == CodeModel::Kernel))
7073 WrapperKind = X86ISD::WrapperRIP;
7074 else if (Subtarget->isPICStyleGOT())
7075 OpFlag = X86II::MO_GOTOFF;
7076 else if (Subtarget->isPICStyleStubPIC())
7077 OpFlag = X86II::MO_PIC_BASE_OFFSET;
7079 SDValue Result = DAG.getTargetConstantPool(CP->getConstVal(), getPointerTy(),
7081 CP->getOffset(), OpFlag);
7082 DebugLoc DL = CP->getDebugLoc();
7083 Result = DAG.getNode(WrapperKind, DL, getPointerTy(), Result);
7084 // With PIC, the address is actually $g + Offset.
7086 Result = DAG.getNode(ISD::ADD, DL, getPointerTy(),
7087 DAG.getNode(X86ISD::GlobalBaseReg,
7088 DebugLoc(), getPointerTy()),
7095 SDValue X86TargetLowering::LowerJumpTable(SDValue Op, SelectionDAG &DAG) const {
7096 JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
7098 // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
7100 unsigned char OpFlag = 0;
7101 unsigned WrapperKind = X86ISD::Wrapper;
7102 CodeModel::Model M = getTargetMachine().getCodeModel();
7104 if (Subtarget->isPICStyleRIPRel() &&
7105 (M == CodeModel::Small || M == CodeModel::Kernel))
7106 WrapperKind = X86ISD::WrapperRIP;
7107 else if (Subtarget->isPICStyleGOT())
7108 OpFlag = X86II::MO_GOTOFF;
7109 else if (Subtarget->isPICStyleStubPIC())
7110 OpFlag = X86II::MO_PIC_BASE_OFFSET;
7112 SDValue Result = DAG.getTargetJumpTable(JT->getIndex(), getPointerTy(),
7114 DebugLoc DL = JT->getDebugLoc();
7115 Result = DAG.getNode(WrapperKind, DL, getPointerTy(), Result);
7117 // With PIC, the address is actually $g + Offset.
7119 Result = DAG.getNode(ISD::ADD, DL, getPointerTy(),
7120 DAG.getNode(X86ISD::GlobalBaseReg,
7121 DebugLoc(), getPointerTy()),
7128 X86TargetLowering::LowerExternalSymbol(SDValue Op, SelectionDAG &DAG) const {
7129 const char *Sym = cast<ExternalSymbolSDNode>(Op)->getSymbol();
7131 // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
7133 unsigned char OpFlag = 0;
7134 unsigned WrapperKind = X86ISD::Wrapper;
7135 CodeModel::Model M = getTargetMachine().getCodeModel();
7137 if (Subtarget->isPICStyleRIPRel() &&
7138 (M == CodeModel::Small || M == CodeModel::Kernel)) {
7139 if (Subtarget->isTargetDarwin() || Subtarget->isTargetELF())
7140 OpFlag = X86II::MO_GOTPCREL;
7141 WrapperKind = X86ISD::WrapperRIP;
7142 } else if (Subtarget->isPICStyleGOT()) {
7143 OpFlag = X86II::MO_GOT;
7144 } else if (Subtarget->isPICStyleStubPIC()) {
7145 OpFlag = X86II::MO_DARWIN_NONLAZY_PIC_BASE;
7146 } else if (Subtarget->isPICStyleStubNoDynamic()) {
7147 OpFlag = X86II::MO_DARWIN_NONLAZY;
7150 SDValue Result = DAG.getTargetExternalSymbol(Sym, getPointerTy(), OpFlag);
7152 DebugLoc DL = Op.getDebugLoc();
7153 Result = DAG.getNode(WrapperKind, DL, getPointerTy(), Result);
7156 // With PIC, the address is actually $g + Offset.
7157 if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
7158 !Subtarget->is64Bit()) {
7159 Result = DAG.getNode(ISD::ADD, DL, getPointerTy(),
7160 DAG.getNode(X86ISD::GlobalBaseReg,
7161 DebugLoc(), getPointerTy()),
7165 // For symbols that require a load from a stub to get the address, emit the
7167 if (isGlobalStubReference(OpFlag))
7168 Result = DAG.getLoad(getPointerTy(), DL, DAG.getEntryNode(), Result,
7169 MachinePointerInfo::getGOT(), false, false, false, 0);
7175 X86TargetLowering::LowerBlockAddress(SDValue Op, SelectionDAG &DAG) const {
7176 // Create the TargetBlockAddressAddress node.
7177 unsigned char OpFlags =
7178 Subtarget->ClassifyBlockAddressReference();
7179 CodeModel::Model M = getTargetMachine().getCodeModel();
7180 const BlockAddress *BA = cast<BlockAddressSDNode>(Op)->getBlockAddress();
7181 DebugLoc dl = Op.getDebugLoc();
7182 SDValue Result = DAG.getBlockAddress(BA, getPointerTy(),
7183 /*isTarget=*/true, OpFlags);
7185 if (Subtarget->isPICStyleRIPRel() &&
7186 (M == CodeModel::Small || M == CodeModel::Kernel))
7187 Result = DAG.getNode(X86ISD::WrapperRIP, dl, getPointerTy(), Result);
7189 Result = DAG.getNode(X86ISD::Wrapper, dl, getPointerTy(), Result);
7191 // With PIC, the address is actually $g + Offset.
7192 if (isGlobalRelativeToPICBase(OpFlags)) {
7193 Result = DAG.getNode(ISD::ADD, dl, getPointerTy(),
7194 DAG.getNode(X86ISD::GlobalBaseReg, dl, getPointerTy()),
7202 X86TargetLowering::LowerGlobalAddress(const GlobalValue *GV, DebugLoc dl,
7204 SelectionDAG &DAG) const {
7205 // Create the TargetGlobalAddress node, folding in the constant
7206 // offset if it is legal.
7207 unsigned char OpFlags =
7208 Subtarget->ClassifyGlobalReference(GV, getTargetMachine());
7209 CodeModel::Model M = getTargetMachine().getCodeModel();
7211 if (OpFlags == X86II::MO_NO_FLAG &&
7212 X86::isOffsetSuitableForCodeModel(Offset, M)) {
7213 // A direct static reference to a global.
7214 Result = DAG.getTargetGlobalAddress(GV, dl, getPointerTy(), Offset);
7217 Result = DAG.getTargetGlobalAddress(GV, dl, getPointerTy(), 0, OpFlags);
7220 if (Subtarget->isPICStyleRIPRel() &&
7221 (M == CodeModel::Small || M == CodeModel::Kernel))
7222 Result = DAG.getNode(X86ISD::WrapperRIP, dl, getPointerTy(), Result);
7224 Result = DAG.getNode(X86ISD::Wrapper, dl, getPointerTy(), Result);
7226 // With PIC, the address is actually $g + Offset.
7227 if (isGlobalRelativeToPICBase(OpFlags)) {
7228 Result = DAG.getNode(ISD::ADD, dl, getPointerTy(),
7229 DAG.getNode(X86ISD::GlobalBaseReg, dl, getPointerTy()),
7233 // For globals that require a load from a stub to get the address, emit the
7235 if (isGlobalStubReference(OpFlags))
7236 Result = DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(), Result,
7237 MachinePointerInfo::getGOT(), false, false, false, 0);
7239 // If there was a non-zero offset that we didn't fold, create an explicit
7242 Result = DAG.getNode(ISD::ADD, dl, getPointerTy(), Result,
7243 DAG.getConstant(Offset, getPointerTy()));
7249 X86TargetLowering::LowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const {
7250 const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
7251 int64_t Offset = cast<GlobalAddressSDNode>(Op)->getOffset();
7252 return LowerGlobalAddress(GV, Op.getDebugLoc(), Offset, DAG);
7256 GetTLSADDR(SelectionDAG &DAG, SDValue Chain, GlobalAddressSDNode *GA,
7257 SDValue *InFlag, const EVT PtrVT, unsigned ReturnReg,
7258 unsigned char OperandFlags) {
7259 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
7260 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
7261 DebugLoc dl = GA->getDebugLoc();
7262 SDValue TGA = DAG.getTargetGlobalAddress(GA->getGlobal(), dl,
7263 GA->getValueType(0),
7267 SDValue Ops[] = { Chain, TGA, *InFlag };
7268 Chain = DAG.getNode(X86ISD::TLSADDR, dl, NodeTys, Ops, 3);
7270 SDValue Ops[] = { Chain, TGA };
7271 Chain = DAG.getNode(X86ISD::TLSADDR, dl, NodeTys, Ops, 2);
7274 // TLSADDR will be codegen'ed as call. Inform MFI that function has calls.
7275 MFI->setAdjustsStack(true);
7277 SDValue Flag = Chain.getValue(1);
7278 return DAG.getCopyFromReg(Chain, dl, ReturnReg, PtrVT, Flag);
7281 // Lower ISD::GlobalTLSAddress using the "general dynamic" model, 32 bit
7283 LowerToTLSGeneralDynamicModel32(GlobalAddressSDNode *GA, SelectionDAG &DAG,
7286 DebugLoc dl = GA->getDebugLoc(); // ? function entry point might be better
7287 SDValue Chain = DAG.getCopyToReg(DAG.getEntryNode(), dl, X86::EBX,
7288 DAG.getNode(X86ISD::GlobalBaseReg,
7289 DebugLoc(), PtrVT), InFlag);
7290 InFlag = Chain.getValue(1);
7292 return GetTLSADDR(DAG, Chain, GA, &InFlag, PtrVT, X86::EAX, X86II::MO_TLSGD);
7295 // Lower ISD::GlobalTLSAddress using the "general dynamic" model, 64 bit
7297 LowerToTLSGeneralDynamicModel64(GlobalAddressSDNode *GA, SelectionDAG &DAG,
7299 return GetTLSADDR(DAG, DAG.getEntryNode(), GA, NULL, PtrVT,
7300 X86::RAX, X86II::MO_TLSGD);
7303 // Lower ISD::GlobalTLSAddress using the "initial exec" (for no-pic) or
7304 // "local exec" model.
7305 static SDValue LowerToTLSExecModel(GlobalAddressSDNode *GA, SelectionDAG &DAG,
7306 const EVT PtrVT, TLSModel::Model model,
7308 DebugLoc dl = GA->getDebugLoc();
7310 // Get the Thread Pointer, which is %gs:0 (32-bit) or %fs:0 (64-bit).
7311 Value *Ptr = Constant::getNullValue(Type::getInt8PtrTy(*DAG.getContext(),
7312 is64Bit ? 257 : 256));
7314 SDValue ThreadPointer = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(),
7315 DAG.getIntPtrConstant(0),
7316 MachinePointerInfo(Ptr),
7317 false, false, false, 0);
7319 unsigned char OperandFlags = 0;
7320 // Most TLS accesses are not RIP relative, even on x86-64. One exception is
7322 unsigned WrapperKind = X86ISD::Wrapper;
7323 if (model == TLSModel::LocalExec) {
7324 OperandFlags = is64Bit ? X86II::MO_TPOFF : X86II::MO_NTPOFF;
7325 } else if (is64Bit) {
7326 assert(model == TLSModel::InitialExec);
7327 OperandFlags = X86II::MO_GOTTPOFF;
7328 WrapperKind = X86ISD::WrapperRIP;
7330 assert(model == TLSModel::InitialExec);
7331 OperandFlags = X86II::MO_INDNTPOFF;
7334 // emit "addl x@ntpoff,%eax" (local exec) or "addl x@indntpoff,%eax" (initial
7336 SDValue TGA = DAG.getTargetGlobalAddress(GA->getGlobal(), dl,
7337 GA->getValueType(0),
7338 GA->getOffset(), OperandFlags);
7339 SDValue Offset = DAG.getNode(WrapperKind, dl, PtrVT, TGA);
7341 if (model == TLSModel::InitialExec)
7342 Offset = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), Offset,
7343 MachinePointerInfo::getGOT(), false, false, false, 0);
7345 // The address of the thread local variable is the add of the thread
7346 // pointer with the offset of the variable.
7347 return DAG.getNode(ISD::ADD, dl, PtrVT, ThreadPointer, Offset);
7351 X86TargetLowering::LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const {
7353 GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op);
7354 const GlobalValue *GV = GA->getGlobal();
7356 if (Subtarget->isTargetELF()) {
7357 // TODO: implement the "local dynamic" model
7358 // TODO: implement the "initial exec"model for pic executables
7360 // If GV is an alias then use the aliasee for determining
7361 // thread-localness.
7362 if (const GlobalAlias *GA = dyn_cast<GlobalAlias>(GV))
7363 GV = GA->resolveAliasedGlobal(false);
7365 TLSModel::Model model
7366 = getTLSModel(GV, getTargetMachine().getRelocationModel());
7369 case TLSModel::GeneralDynamic:
7370 case TLSModel::LocalDynamic: // not implemented
7371 if (Subtarget->is64Bit())
7372 return LowerToTLSGeneralDynamicModel64(GA, DAG, getPointerTy());
7373 return LowerToTLSGeneralDynamicModel32(GA, DAG, getPointerTy());
7375 case TLSModel::InitialExec:
7376 case TLSModel::LocalExec:
7377 return LowerToTLSExecModel(GA, DAG, getPointerTy(), model,
7378 Subtarget->is64Bit());
7380 } else if (Subtarget->isTargetDarwin()) {
7381 // Darwin only has one model of TLS. Lower to that.
7382 unsigned char OpFlag = 0;
7383 unsigned WrapperKind = Subtarget->isPICStyleRIPRel() ?
7384 X86ISD::WrapperRIP : X86ISD::Wrapper;
7386 // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
7388 bool PIC32 = (getTargetMachine().getRelocationModel() == Reloc::PIC_) &&
7389 !Subtarget->is64Bit();
7391 OpFlag = X86II::MO_TLVP_PIC_BASE;
7393 OpFlag = X86II::MO_TLVP;
7394 DebugLoc DL = Op.getDebugLoc();
7395 SDValue Result = DAG.getTargetGlobalAddress(GA->getGlobal(), DL,
7396 GA->getValueType(0),
7397 GA->getOffset(), OpFlag);
7398 SDValue Offset = DAG.getNode(WrapperKind, DL, getPointerTy(), Result);
7400 // With PIC32, the address is actually $g + Offset.
7402 Offset = DAG.getNode(ISD::ADD, DL, getPointerTy(),
7403 DAG.getNode(X86ISD::GlobalBaseReg,
7404 DebugLoc(), getPointerTy()),
7407 // Lowering the machine isd will make sure everything is in the right
7409 SDValue Chain = DAG.getEntryNode();
7410 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
7411 SDValue Args[] = { Chain, Offset };
7412 Chain = DAG.getNode(X86ISD::TLSCALL, DL, NodeTys, Args, 2);
7414 // TLSCALL will be codegen'ed as call. Inform MFI that function has calls.
7415 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
7416 MFI->setAdjustsStack(true);
7418 // And our return value (tls address) is in the standard call return value
7420 unsigned Reg = Subtarget->is64Bit() ? X86::RAX : X86::EAX;
7421 return DAG.getCopyFromReg(Chain, DL, Reg, getPointerTy(),
7426 "TLS not implemented for this target.");
7428 llvm_unreachable("Unreachable");
7433 /// LowerShiftParts - Lower SRA_PARTS and friends, which return two i32 values
7434 /// and take a 2 x i32 value to shift plus a shift amount.
7435 SDValue X86TargetLowering::LowerShiftParts(SDValue Op, SelectionDAG &DAG) const{
7436 assert(Op.getNumOperands() == 3 && "Not a double-shift!");
7437 EVT VT = Op.getValueType();
7438 unsigned VTBits = VT.getSizeInBits();
7439 DebugLoc dl = Op.getDebugLoc();
7440 bool isSRA = Op.getOpcode() == ISD::SRA_PARTS;
7441 SDValue ShOpLo = Op.getOperand(0);
7442 SDValue ShOpHi = Op.getOperand(1);
7443 SDValue ShAmt = Op.getOperand(2);
7444 SDValue Tmp1 = isSRA ? DAG.getNode(ISD::SRA, dl, VT, ShOpHi,
7445 DAG.getConstant(VTBits - 1, MVT::i8))
7446 : DAG.getConstant(0, VT);
7449 if (Op.getOpcode() == ISD::SHL_PARTS) {
7450 Tmp2 = DAG.getNode(X86ISD::SHLD, dl, VT, ShOpHi, ShOpLo, ShAmt);
7451 Tmp3 = DAG.getNode(ISD::SHL, dl, VT, ShOpLo, ShAmt);
7453 Tmp2 = DAG.getNode(X86ISD::SHRD, dl, VT, ShOpLo, ShOpHi, ShAmt);
7454 Tmp3 = DAG.getNode(isSRA ? ISD::SRA : ISD::SRL, dl, VT, ShOpHi, ShAmt);
7457 SDValue AndNode = DAG.getNode(ISD::AND, dl, MVT::i8, ShAmt,
7458 DAG.getConstant(VTBits, MVT::i8));
7459 SDValue Cond = DAG.getNode(X86ISD::CMP, dl, MVT::i32,
7460 AndNode, DAG.getConstant(0, MVT::i8));
7463 SDValue CC = DAG.getConstant(X86::COND_NE, MVT::i8);
7464 SDValue Ops0[4] = { Tmp2, Tmp3, CC, Cond };
7465 SDValue Ops1[4] = { Tmp3, Tmp1, CC, Cond };
7467 if (Op.getOpcode() == ISD::SHL_PARTS) {
7468 Hi = DAG.getNode(X86ISD::CMOV, dl, VT, Ops0, 4);
7469 Lo = DAG.getNode(X86ISD::CMOV, dl, VT, Ops1, 4);
7471 Lo = DAG.getNode(X86ISD::CMOV, dl, VT, Ops0, 4);
7472 Hi = DAG.getNode(X86ISD::CMOV, dl, VT, Ops1, 4);
7475 SDValue Ops[2] = { Lo, Hi };
7476 return DAG.getMergeValues(Ops, 2, dl);
7479 SDValue X86TargetLowering::LowerSINT_TO_FP(SDValue Op,
7480 SelectionDAG &DAG) const {
7481 EVT SrcVT = Op.getOperand(0).getValueType();
7483 if (SrcVT.isVector())
7486 assert(SrcVT.getSimpleVT() <= MVT::i64 && SrcVT.getSimpleVT() >= MVT::i16 &&
7487 "Unknown SINT_TO_FP to lower!");
7489 // These are really Legal; return the operand so the caller accepts it as
7491 if (SrcVT == MVT::i32 && isScalarFPTypeInSSEReg(Op.getValueType()))
7493 if (SrcVT == MVT::i64 && isScalarFPTypeInSSEReg(Op.getValueType()) &&
7494 Subtarget->is64Bit()) {
7498 DebugLoc dl = Op.getDebugLoc();
7499 unsigned Size = SrcVT.getSizeInBits()/8;
7500 MachineFunction &MF = DAG.getMachineFunction();
7501 int SSFI = MF.getFrameInfo()->CreateStackObject(Size, Size, false);
7502 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
7503 SDValue Chain = DAG.getStore(DAG.getEntryNode(), dl, Op.getOperand(0),
7505 MachinePointerInfo::getFixedStack(SSFI),
7507 return BuildFILD(Op, SrcVT, Chain, StackSlot, DAG);
7510 SDValue X86TargetLowering::BuildFILD(SDValue Op, EVT SrcVT, SDValue Chain,
7512 SelectionDAG &DAG) const {
7514 DebugLoc DL = Op.getDebugLoc();
7516 bool useSSE = isScalarFPTypeInSSEReg(Op.getValueType());
7518 Tys = DAG.getVTList(MVT::f64, MVT::Other, MVT::Glue);
7520 Tys = DAG.getVTList(Op.getValueType(), MVT::Other);
7522 unsigned ByteSize = SrcVT.getSizeInBits()/8;
7524 FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(StackSlot);
7525 MachineMemOperand *MMO;
7527 int SSFI = FI->getIndex();
7529 DAG.getMachineFunction()
7530 .getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
7531 MachineMemOperand::MOLoad, ByteSize, ByteSize);
7533 MMO = cast<LoadSDNode>(StackSlot)->getMemOperand();
7534 StackSlot = StackSlot.getOperand(1);
7536 SDValue Ops[] = { Chain, StackSlot, DAG.getValueType(SrcVT) };
7537 SDValue Result = DAG.getMemIntrinsicNode(useSSE ? X86ISD::FILD_FLAG :
7539 Tys, Ops, array_lengthof(Ops),
7543 Chain = Result.getValue(1);
7544 SDValue InFlag = Result.getValue(2);
7546 // FIXME: Currently the FST is flagged to the FILD_FLAG. This
7547 // shouldn't be necessary except that RFP cannot be live across
7548 // multiple blocks. When stackifier is fixed, they can be uncoupled.
7549 MachineFunction &MF = DAG.getMachineFunction();
7550 unsigned SSFISize = Op.getValueType().getSizeInBits()/8;
7551 int SSFI = MF.getFrameInfo()->CreateStackObject(SSFISize, SSFISize, false);
7552 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
7553 Tys = DAG.getVTList(MVT::Other);
7555 Chain, Result, StackSlot, DAG.getValueType(Op.getValueType()), InFlag
7557 MachineMemOperand *MMO =
7558 DAG.getMachineFunction()
7559 .getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
7560 MachineMemOperand::MOStore, SSFISize, SSFISize);
7562 Chain = DAG.getMemIntrinsicNode(X86ISD::FST, DL, Tys,
7563 Ops, array_lengthof(Ops),
7564 Op.getValueType(), MMO);
7565 Result = DAG.getLoad(Op.getValueType(), DL, Chain, StackSlot,
7566 MachinePointerInfo::getFixedStack(SSFI),
7567 false, false, false, 0);
7573 // LowerUINT_TO_FP_i64 - 64-bit unsigned integer to double expansion.
7574 SDValue X86TargetLowering::LowerUINT_TO_FP_i64(SDValue Op,
7575 SelectionDAG &DAG) const {
7576 // This algorithm is not obvious. Here it is what we're trying to output:
7579 punpckldq (c0), %xmm0 // c0: (uint4){ 0x43300000U, 0x45300000U, 0U, 0U }
7580 subpd (c1), %xmm0 // c1: (double2){ 0x1.0p52, 0x1.0p52 * 0x1.0p32 }
7584 pshufd $0x4e, %xmm0, %xmm1
7589 DebugLoc dl = Op.getDebugLoc();
7590 LLVMContext *Context = DAG.getContext();
7592 // Build some magic constants.
7593 SmallVector<Constant*,4> CV0;
7594 CV0.push_back(ConstantInt::get(*Context, APInt(32, 0x43300000)));
7595 CV0.push_back(ConstantInt::get(*Context, APInt(32, 0x45300000)));
7596 CV0.push_back(ConstantInt::get(*Context, APInt(32, 0)));
7597 CV0.push_back(ConstantInt::get(*Context, APInt(32, 0)));
7598 Constant *C0 = ConstantVector::get(CV0);
7599 SDValue CPIdx0 = DAG.getConstantPool(C0, getPointerTy(), 16);
7601 SmallVector<Constant*,2> CV1;
7603 ConstantFP::get(*Context, APFloat(APInt(64, 0x4330000000000000ULL))));
7605 ConstantFP::get(*Context, APFloat(APInt(64, 0x4530000000000000ULL))));
7606 Constant *C1 = ConstantVector::get(CV1);
7607 SDValue CPIdx1 = DAG.getConstantPool(C1, getPointerTy(), 16);
7609 // Load the 64-bit value into an XMM register.
7610 SDValue XR1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2i64,
7612 SDValue CLod0 = DAG.getLoad(MVT::v4i32, dl, DAG.getEntryNode(), CPIdx0,
7613 MachinePointerInfo::getConstantPool(),
7614 false, false, false, 16);
7615 SDValue Unpck1 = getUnpackl(DAG, dl, MVT::v4i32,
7616 DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, XR1),
7619 SDValue CLod1 = DAG.getLoad(MVT::v2f64, dl, CLod0.getValue(1), CPIdx1,
7620 MachinePointerInfo::getConstantPool(),
7621 false, false, false, 16);
7622 SDValue XR2F = DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, Unpck1);
7623 SDValue Sub = DAG.getNode(ISD::FSUB, dl, MVT::v2f64, XR2F, CLod1);
7626 if (Subtarget->hasSSE3()) {
7627 // FIXME: The 'haddpd' instruction may be slower than 'movhlps + addsd'.
7628 Result = DAG.getNode(X86ISD::FHADD, dl, MVT::v2f64, Sub, Sub);
7630 SDValue S2F = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, Sub);
7631 SDValue Shuffle = getTargetShuffleNode(X86ISD::PSHUFD, dl, MVT::v4i32,
7633 Result = DAG.getNode(ISD::FADD, dl, MVT::v2f64,
7634 DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, Shuffle),
7638 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Result,
7639 DAG.getIntPtrConstant(0));
7642 // LowerUINT_TO_FP_i32 - 32-bit unsigned integer to float expansion.
7643 SDValue X86TargetLowering::LowerUINT_TO_FP_i32(SDValue Op,
7644 SelectionDAG &DAG) const {
7645 DebugLoc dl = Op.getDebugLoc();
7646 // FP constant to bias correct the final result.
7647 SDValue Bias = DAG.getConstantFP(BitsToDouble(0x4330000000000000ULL),
7650 // Load the 32-bit value into an XMM register.
7651 SDValue Load = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32,
7654 // Zero out the upper parts of the register.
7655 Load = getShuffleVectorZeroOrUndef(Load, 0, true, Subtarget, DAG);
7657 Load = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64,
7658 DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, Load),
7659 DAG.getIntPtrConstant(0));
7661 // Or the load with the bias.
7662 SDValue Or = DAG.getNode(ISD::OR, dl, MVT::v2i64,
7663 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64,
7664 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
7666 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64,
7667 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
7668 MVT::v2f64, Bias)));
7669 Or = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64,
7670 DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, Or),
7671 DAG.getIntPtrConstant(0));
7673 // Subtract the bias.
7674 SDValue Sub = DAG.getNode(ISD::FSUB, dl, MVT::f64, Or, Bias);
7676 // Handle final rounding.
7677 EVT DestVT = Op.getValueType();
7679 if (DestVT.bitsLT(MVT::f64)) {
7680 return DAG.getNode(ISD::FP_ROUND, dl, DestVT, Sub,
7681 DAG.getIntPtrConstant(0));
7682 } else if (DestVT.bitsGT(MVT::f64)) {
7683 return DAG.getNode(ISD::FP_EXTEND, dl, DestVT, Sub);
7686 // Handle final rounding.
7690 SDValue X86TargetLowering::LowerUINT_TO_FP(SDValue Op,
7691 SelectionDAG &DAG) const {
7692 SDValue N0 = Op.getOperand(0);
7693 DebugLoc dl = Op.getDebugLoc();
7695 // Since UINT_TO_FP is legal (it's marked custom), dag combiner won't
7696 // optimize it to a SINT_TO_FP when the sign bit is known zero. Perform
7697 // the optimization here.
7698 if (DAG.SignBitIsZero(N0))
7699 return DAG.getNode(ISD::SINT_TO_FP, dl, Op.getValueType(), N0);
7701 EVT SrcVT = N0.getValueType();
7702 EVT DstVT = Op.getValueType();
7703 if (SrcVT == MVT::i64 && DstVT == MVT::f64 && X86ScalarSSEf64)
7704 return LowerUINT_TO_FP_i64(Op, DAG);
7705 else if (SrcVT == MVT::i32 && X86ScalarSSEf64)
7706 return LowerUINT_TO_FP_i32(Op, DAG);
7707 else if (Subtarget->is64Bit() &&
7708 SrcVT == MVT::i64 && DstVT == MVT::f32)
7711 // Make a 64-bit buffer, and use it to build an FILD.
7712 SDValue StackSlot = DAG.CreateStackTemporary(MVT::i64);
7713 if (SrcVT == MVT::i32) {
7714 SDValue WordOff = DAG.getConstant(4, getPointerTy());
7715 SDValue OffsetSlot = DAG.getNode(ISD::ADD, dl,
7716 getPointerTy(), StackSlot, WordOff);
7717 SDValue Store1 = DAG.getStore(DAG.getEntryNode(), dl, Op.getOperand(0),
7718 StackSlot, MachinePointerInfo(),
7720 SDValue Store2 = DAG.getStore(Store1, dl, DAG.getConstant(0, MVT::i32),
7721 OffsetSlot, MachinePointerInfo(),
7723 SDValue Fild = BuildFILD(Op, MVT::i64, Store2, StackSlot, DAG);
7727 assert(SrcVT == MVT::i64 && "Unexpected type in UINT_TO_FP");
7728 SDValue Store = DAG.getStore(DAG.getEntryNode(), dl, Op.getOperand(0),
7729 StackSlot, MachinePointerInfo(),
7731 // For i64 source, we need to add the appropriate power of 2 if the input
7732 // was negative. This is the same as the optimization in
7733 // DAGTypeLegalizer::ExpandIntOp_UNIT_TO_FP, and for it to be safe here,
7734 // we must be careful to do the computation in x87 extended precision, not
7735 // in SSE. (The generic code can't know it's OK to do this, or how to.)
7736 int SSFI = cast<FrameIndexSDNode>(StackSlot)->getIndex();
7737 MachineMemOperand *MMO =
7738 DAG.getMachineFunction()
7739 .getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
7740 MachineMemOperand::MOLoad, 8, 8);
7742 SDVTList Tys = DAG.getVTList(MVT::f80, MVT::Other);
7743 SDValue Ops[] = { Store, StackSlot, DAG.getValueType(MVT::i64) };
7744 SDValue Fild = DAG.getMemIntrinsicNode(X86ISD::FILD, dl, Tys, Ops, 3,
7747 APInt FF(32, 0x5F800000ULL);
7749 // Check whether the sign bit is set.
7750 SDValue SignSet = DAG.getSetCC(dl, getSetCCResultType(MVT::i64),
7751 Op.getOperand(0), DAG.getConstant(0, MVT::i64),
7754 // Build a 64 bit pair (0, FF) in the constant pool, with FF in the lo bits.
7755 SDValue FudgePtr = DAG.getConstantPool(
7756 ConstantInt::get(*DAG.getContext(), FF.zext(64)),
7759 // Get a pointer to FF if the sign bit was set, or to 0 otherwise.
7760 SDValue Zero = DAG.getIntPtrConstant(0);
7761 SDValue Four = DAG.getIntPtrConstant(4);
7762 SDValue Offset = DAG.getNode(ISD::SELECT, dl, Zero.getValueType(), SignSet,
7764 FudgePtr = DAG.getNode(ISD::ADD, dl, getPointerTy(), FudgePtr, Offset);
7766 // Load the value out, extending it from f32 to f80.
7767 // FIXME: Avoid the extend by constructing the right constant pool?
7768 SDValue Fudge = DAG.getExtLoad(ISD::EXTLOAD, dl, MVT::f80, DAG.getEntryNode(),
7769 FudgePtr, MachinePointerInfo::getConstantPool(),
7770 MVT::f32, false, false, 4);
7771 // Extend everything to 80 bits to force it to be done on x87.
7772 SDValue Add = DAG.getNode(ISD::FADD, dl, MVT::f80, Fild, Fudge);
7773 return DAG.getNode(ISD::FP_ROUND, dl, DstVT, Add, DAG.getIntPtrConstant(0));
7776 std::pair<SDValue,SDValue> X86TargetLowering::
7777 FP_TO_INTHelper(SDValue Op, SelectionDAG &DAG, bool IsSigned) const {
7778 DebugLoc DL = Op.getDebugLoc();
7780 EVT DstTy = Op.getValueType();
7783 assert(DstTy == MVT::i32 && "Unexpected FP_TO_UINT");
7787 assert(DstTy.getSimpleVT() <= MVT::i64 &&
7788 DstTy.getSimpleVT() >= MVT::i16 &&
7789 "Unknown FP_TO_SINT to lower!");
7791 // These are really Legal.
7792 if (DstTy == MVT::i32 &&
7793 isScalarFPTypeInSSEReg(Op.getOperand(0).getValueType()))
7794 return std::make_pair(SDValue(), SDValue());
7795 if (Subtarget->is64Bit() &&
7796 DstTy == MVT::i64 &&
7797 isScalarFPTypeInSSEReg(Op.getOperand(0).getValueType()))
7798 return std::make_pair(SDValue(), SDValue());
7800 // We lower FP->sint64 into FISTP64, followed by a load, all to a temporary
7802 MachineFunction &MF = DAG.getMachineFunction();
7803 unsigned MemSize = DstTy.getSizeInBits()/8;
7804 int SSFI = MF.getFrameInfo()->CreateStackObject(MemSize, MemSize, false);
7805 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
7810 switch (DstTy.getSimpleVT().SimpleTy) {
7811 default: llvm_unreachable("Invalid FP_TO_SINT to lower!");
7812 case MVT::i16: Opc = X86ISD::FP_TO_INT16_IN_MEM; break;
7813 case MVT::i32: Opc = X86ISD::FP_TO_INT32_IN_MEM; break;
7814 case MVT::i64: Opc = X86ISD::FP_TO_INT64_IN_MEM; break;
7817 SDValue Chain = DAG.getEntryNode();
7818 SDValue Value = Op.getOperand(0);
7819 EVT TheVT = Op.getOperand(0).getValueType();
7820 if (isScalarFPTypeInSSEReg(TheVT)) {
7821 assert(DstTy == MVT::i64 && "Invalid FP_TO_SINT to lower!");
7822 Chain = DAG.getStore(Chain, DL, Value, StackSlot,
7823 MachinePointerInfo::getFixedStack(SSFI),
7825 SDVTList Tys = DAG.getVTList(Op.getOperand(0).getValueType(), MVT::Other);
7827 Chain, StackSlot, DAG.getValueType(TheVT)
7830 MachineMemOperand *MMO =
7831 MF.getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
7832 MachineMemOperand::MOLoad, MemSize, MemSize);
7833 Value = DAG.getMemIntrinsicNode(X86ISD::FLD, DL, Tys, Ops, 3,
7835 Chain = Value.getValue(1);
7836 SSFI = MF.getFrameInfo()->CreateStackObject(MemSize, MemSize, false);
7837 StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
7840 MachineMemOperand *MMO =
7841 MF.getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
7842 MachineMemOperand::MOStore, MemSize, MemSize);
7844 // Build the FP_TO_INT*_IN_MEM
7845 SDValue Ops[] = { Chain, Value, StackSlot };
7846 SDValue FIST = DAG.getMemIntrinsicNode(Opc, DL, DAG.getVTList(MVT::Other),
7847 Ops, 3, DstTy, MMO);
7849 return std::make_pair(FIST, StackSlot);
7852 SDValue X86TargetLowering::LowerFP_TO_SINT(SDValue Op,
7853 SelectionDAG &DAG) const {
7854 if (Op.getValueType().isVector())
7857 std::pair<SDValue,SDValue> Vals = FP_TO_INTHelper(Op, DAG, true);
7858 SDValue FIST = Vals.first, StackSlot = Vals.second;
7859 // If FP_TO_INTHelper failed, the node is actually supposed to be Legal.
7860 if (FIST.getNode() == 0) return Op;
7863 return DAG.getLoad(Op.getValueType(), Op.getDebugLoc(),
7864 FIST, StackSlot, MachinePointerInfo(),
7865 false, false, false, 0);
7868 SDValue X86TargetLowering::LowerFP_TO_UINT(SDValue Op,
7869 SelectionDAG &DAG) const {
7870 std::pair<SDValue,SDValue> Vals = FP_TO_INTHelper(Op, DAG, false);
7871 SDValue FIST = Vals.first, StackSlot = Vals.second;
7872 assert(FIST.getNode() && "Unexpected failure");
7875 return DAG.getLoad(Op.getValueType(), Op.getDebugLoc(),
7876 FIST, StackSlot, MachinePointerInfo(),
7877 false, false, false, 0);
7880 SDValue X86TargetLowering::LowerFABS(SDValue Op,
7881 SelectionDAG &DAG) const {
7882 LLVMContext *Context = DAG.getContext();
7883 DebugLoc dl = Op.getDebugLoc();
7884 EVT VT = Op.getValueType();
7887 EltVT = VT.getVectorElementType();
7888 SmallVector<Constant*,4> CV;
7889 if (EltVT == MVT::f64) {
7890 Constant *C = ConstantFP::get(*Context, APFloat(APInt(64, ~(1ULL << 63))));
7893 Constant *C = ConstantFP::get(*Context, APFloat(APInt(32, ~(1U << 31))));
7896 Constant *C = ConstantVector::get(CV);
7897 SDValue CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
7898 SDValue Mask = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
7899 MachinePointerInfo::getConstantPool(),
7900 false, false, false, 16);
7901 return DAG.getNode(X86ISD::FAND, dl, VT, Op.getOperand(0), Mask);
7904 SDValue X86TargetLowering::LowerFNEG(SDValue Op, SelectionDAG &DAG) const {
7905 LLVMContext *Context = DAG.getContext();
7906 DebugLoc dl = Op.getDebugLoc();
7907 EVT VT = Op.getValueType();
7909 unsigned NumElts = VT == MVT::f64 ? 2 : 4;
7910 if (VT.isVector()) {
7911 EltVT = VT.getVectorElementType();
7912 NumElts = VT.getVectorNumElements();
7914 SmallVector<Constant*,8> CV;
7915 if (EltVT == MVT::f64) {
7916 Constant *C = ConstantFP::get(*Context, APFloat(APInt(64, 1ULL << 63)));
7917 CV.assign(NumElts, C);
7919 Constant *C = ConstantFP::get(*Context, APFloat(APInt(32, 1U << 31)));
7920 CV.assign(NumElts, C);
7922 Constant *C = ConstantVector::get(CV);
7923 SDValue CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
7924 SDValue Mask = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
7925 MachinePointerInfo::getConstantPool(),
7926 false, false, false, 16);
7927 if (VT.isVector()) {
7928 MVT XORVT = VT.getSizeInBits() == 128 ? MVT::v2i64 : MVT::v4i64;
7929 return DAG.getNode(ISD::BITCAST, dl, VT,
7930 DAG.getNode(ISD::XOR, dl, XORVT,
7931 DAG.getNode(ISD::BITCAST, dl, XORVT,
7933 DAG.getNode(ISD::BITCAST, dl, XORVT, Mask)));
7935 return DAG.getNode(X86ISD::FXOR, dl, VT, Op.getOperand(0), Mask);
7939 SDValue X86TargetLowering::LowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) const {
7940 LLVMContext *Context = DAG.getContext();
7941 SDValue Op0 = Op.getOperand(0);
7942 SDValue Op1 = Op.getOperand(1);
7943 DebugLoc dl = Op.getDebugLoc();
7944 EVT VT = Op.getValueType();
7945 EVT SrcVT = Op1.getValueType();
7947 // If second operand is smaller, extend it first.
7948 if (SrcVT.bitsLT(VT)) {
7949 Op1 = DAG.getNode(ISD::FP_EXTEND, dl, VT, Op1);
7952 // And if it is bigger, shrink it first.
7953 if (SrcVT.bitsGT(VT)) {
7954 Op1 = DAG.getNode(ISD::FP_ROUND, dl, VT, Op1, DAG.getIntPtrConstant(1));
7958 // At this point the operands and the result should have the same
7959 // type, and that won't be f80 since that is not custom lowered.
7961 // First get the sign bit of second operand.
7962 SmallVector<Constant*,4> CV;
7963 if (SrcVT == MVT::f64) {
7964 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(64, 1ULL << 63))));
7965 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(64, 0))));
7967 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 1U << 31))));
7968 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 0))));
7969 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 0))));
7970 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 0))));
7972 Constant *C = ConstantVector::get(CV);
7973 SDValue CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
7974 SDValue Mask1 = DAG.getLoad(SrcVT, dl, DAG.getEntryNode(), CPIdx,
7975 MachinePointerInfo::getConstantPool(),
7976 false, false, false, 16);
7977 SDValue SignBit = DAG.getNode(X86ISD::FAND, dl, SrcVT, Op1, Mask1);
7979 // Shift sign bit right or left if the two operands have different types.
7980 if (SrcVT.bitsGT(VT)) {
7981 // Op0 is MVT::f32, Op1 is MVT::f64.
7982 SignBit = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2f64, SignBit);
7983 SignBit = DAG.getNode(X86ISD::FSRL, dl, MVT::v2f64, SignBit,
7984 DAG.getConstant(32, MVT::i32));
7985 SignBit = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, SignBit);
7986 SignBit = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f32, SignBit,
7987 DAG.getIntPtrConstant(0));
7990 // Clear first operand sign bit.
7992 if (VT == MVT::f64) {
7993 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(64, ~(1ULL << 63)))));
7994 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(64, 0))));
7996 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, ~(1U << 31)))));
7997 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 0))));
7998 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 0))));
7999 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 0))));
8001 C = ConstantVector::get(CV);
8002 CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
8003 SDValue Mask2 = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
8004 MachinePointerInfo::getConstantPool(),
8005 false, false, false, 16);
8006 SDValue Val = DAG.getNode(X86ISD::FAND, dl, VT, Op0, Mask2);
8008 // Or the value with the sign bit.
8009 return DAG.getNode(X86ISD::FOR, dl, VT, Val, SignBit);
8012 SDValue X86TargetLowering::LowerFGETSIGN(SDValue Op, SelectionDAG &DAG) const {
8013 SDValue N0 = Op.getOperand(0);
8014 DebugLoc dl = Op.getDebugLoc();
8015 EVT VT = Op.getValueType();
8017 // Lower ISD::FGETSIGN to (AND (X86ISD::FGETSIGNx86 ...) 1).
8018 SDValue xFGETSIGN = DAG.getNode(X86ISD::FGETSIGNx86, dl, VT, N0,
8019 DAG.getConstant(1, VT));
8020 return DAG.getNode(ISD::AND, dl, VT, xFGETSIGN, DAG.getConstant(1, VT));
8023 /// Emit nodes that will be selected as "test Op0,Op0", or something
8025 SDValue X86TargetLowering::EmitTest(SDValue Op, unsigned X86CC,
8026 SelectionDAG &DAG) const {
8027 DebugLoc dl = Op.getDebugLoc();
8029 // CF and OF aren't always set the way we want. Determine which
8030 // of these we need.
8031 bool NeedCF = false;
8032 bool NeedOF = false;
8035 case X86::COND_A: case X86::COND_AE:
8036 case X86::COND_B: case X86::COND_BE:
8039 case X86::COND_G: case X86::COND_GE:
8040 case X86::COND_L: case X86::COND_LE:
8041 case X86::COND_O: case X86::COND_NO:
8046 // See if we can use the EFLAGS value from the operand instead of
8047 // doing a separate TEST. TEST always sets OF and CF to 0, so unless
8048 // we prove that the arithmetic won't overflow, we can't use OF or CF.
8049 if (Op.getResNo() != 0 || NeedOF || NeedCF)
8050 // Emit a CMP with 0, which is the TEST pattern.
8051 return DAG.getNode(X86ISD::CMP, dl, MVT::i32, Op,
8052 DAG.getConstant(0, Op.getValueType()));
8054 unsigned Opcode = 0;
8055 unsigned NumOperands = 0;
8056 switch (Op.getNode()->getOpcode()) {
8058 // Due to an isel shortcoming, be conservative if this add is likely to be
8059 // selected as part of a load-modify-store instruction. When the root node
8060 // in a match is a store, isel doesn't know how to remap non-chain non-flag
8061 // uses of other nodes in the match, such as the ADD in this case. This
8062 // leads to the ADD being left around and reselected, with the result being
8063 // two adds in the output. Alas, even if none our users are stores, that
8064 // doesn't prove we're O.K. Ergo, if we have any parents that aren't
8065 // CopyToReg or SETCC, eschew INC/DEC. A better fix seems to require
8066 // climbing the DAG back to the root, and it doesn't seem to be worth the
8068 for (SDNode::use_iterator UI = Op.getNode()->use_begin(),
8069 UE = Op.getNode()->use_end(); UI != UE; ++UI)
8070 if (UI->getOpcode() != ISD::CopyToReg &&
8071 UI->getOpcode() != ISD::SETCC &&
8072 UI->getOpcode() != ISD::STORE)
8075 if (ConstantSDNode *C =
8076 dyn_cast<ConstantSDNode>(Op.getNode()->getOperand(1))) {
8077 // An add of one will be selected as an INC.
8078 if (C->getAPIntValue() == 1) {
8079 Opcode = X86ISD::INC;
8084 // An add of negative one (subtract of one) will be selected as a DEC.
8085 if (C->getAPIntValue().isAllOnesValue()) {
8086 Opcode = X86ISD::DEC;
8092 // Otherwise use a regular EFLAGS-setting add.
8093 Opcode = X86ISD::ADD;
8097 // If the primary and result isn't used, don't bother using X86ISD::AND,
8098 // because a TEST instruction will be better.
8099 bool NonFlagUse = false;
8100 for (SDNode::use_iterator UI = Op.getNode()->use_begin(),
8101 UE = Op.getNode()->use_end(); UI != UE; ++UI) {
8103 unsigned UOpNo = UI.getOperandNo();
8104 if (User->getOpcode() == ISD::TRUNCATE && User->hasOneUse()) {
8105 // Look pass truncate.
8106 UOpNo = User->use_begin().getOperandNo();
8107 User = *User->use_begin();
8110 if (User->getOpcode() != ISD::BRCOND &&
8111 User->getOpcode() != ISD::SETCC &&
8112 (User->getOpcode() != ISD::SELECT || UOpNo != 0)) {
8125 // Due to the ISEL shortcoming noted above, be conservative if this op is
8126 // likely to be selected as part of a load-modify-store instruction.
8127 for (SDNode::use_iterator UI = Op.getNode()->use_begin(),
8128 UE = Op.getNode()->use_end(); UI != UE; ++UI)
8129 if (UI->getOpcode() == ISD::STORE)
8132 // Otherwise use a regular EFLAGS-setting instruction.
8133 switch (Op.getNode()->getOpcode()) {
8134 default: llvm_unreachable("unexpected operator!");
8135 case ISD::SUB: Opcode = X86ISD::SUB; break;
8136 case ISD::OR: Opcode = X86ISD::OR; break;
8137 case ISD::XOR: Opcode = X86ISD::XOR; break;
8138 case ISD::AND: Opcode = X86ISD::AND; break;
8150 return SDValue(Op.getNode(), 1);
8157 // Emit a CMP with 0, which is the TEST pattern.
8158 return DAG.getNode(X86ISD::CMP, dl, MVT::i32, Op,
8159 DAG.getConstant(0, Op.getValueType()));
8161 SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::i32);
8162 SmallVector<SDValue, 4> Ops;
8163 for (unsigned i = 0; i != NumOperands; ++i)
8164 Ops.push_back(Op.getOperand(i));
8166 SDValue New = DAG.getNode(Opcode, dl, VTs, &Ops[0], NumOperands);
8167 DAG.ReplaceAllUsesWith(Op, New);
8168 return SDValue(New.getNode(), 1);
8171 /// Emit nodes that will be selected as "cmp Op0,Op1", or something
8173 SDValue X86TargetLowering::EmitCmp(SDValue Op0, SDValue Op1, unsigned X86CC,
8174 SelectionDAG &DAG) const {
8175 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op1))
8176 if (C->getAPIntValue() == 0)
8177 return EmitTest(Op0, X86CC, DAG);
8179 DebugLoc dl = Op0.getDebugLoc();
8180 return DAG.getNode(X86ISD::CMP, dl, MVT::i32, Op0, Op1);
8183 /// LowerToBT - Result of 'and' is compared against zero. Turn it into a BT node
8184 /// if it's possible.
8185 SDValue X86TargetLowering::LowerToBT(SDValue And, ISD::CondCode CC,
8186 DebugLoc dl, SelectionDAG &DAG) const {
8187 SDValue Op0 = And.getOperand(0);
8188 SDValue Op1 = And.getOperand(1);
8189 if (Op0.getOpcode() == ISD::TRUNCATE)
8190 Op0 = Op0.getOperand(0);
8191 if (Op1.getOpcode() == ISD::TRUNCATE)
8192 Op1 = Op1.getOperand(0);
8195 if (Op1.getOpcode() == ISD::SHL)
8196 std::swap(Op0, Op1);
8197 if (Op0.getOpcode() == ISD::SHL) {
8198 if (ConstantSDNode *And00C = dyn_cast<ConstantSDNode>(Op0.getOperand(0)))
8199 if (And00C->getZExtValue() == 1) {
8200 // If we looked past a truncate, check that it's only truncating away
8202 unsigned BitWidth = Op0.getValueSizeInBits();
8203 unsigned AndBitWidth = And.getValueSizeInBits();
8204 if (BitWidth > AndBitWidth) {
8205 APInt Mask = APInt::getAllOnesValue(BitWidth), Zeros, Ones;
8206 DAG.ComputeMaskedBits(Op0, Mask, Zeros, Ones);
8207 if (Zeros.countLeadingOnes() < BitWidth - AndBitWidth)
8211 RHS = Op0.getOperand(1);
8213 } else if (Op1.getOpcode() == ISD::Constant) {
8214 ConstantSDNode *AndRHS = cast<ConstantSDNode>(Op1);
8215 uint64_t AndRHSVal = AndRHS->getZExtValue();
8216 SDValue AndLHS = Op0;
8218 if (AndRHSVal == 1 && AndLHS.getOpcode() == ISD::SRL) {
8219 LHS = AndLHS.getOperand(0);
8220 RHS = AndLHS.getOperand(1);
8223 // Use BT if the immediate can't be encoded in a TEST instruction.
8224 if (!isUInt<32>(AndRHSVal) && isPowerOf2_64(AndRHSVal)) {
8226 RHS = DAG.getConstant(Log2_64_Ceil(AndRHSVal), LHS.getValueType());
8230 if (LHS.getNode()) {
8231 // If LHS is i8, promote it to i32 with any_extend. There is no i8 BT
8232 // instruction. Since the shift amount is in-range-or-undefined, we know
8233 // that doing a bittest on the i32 value is ok. We extend to i32 because
8234 // the encoding for the i16 version is larger than the i32 version.
8235 // Also promote i16 to i32 for performance / code size reason.
8236 if (LHS.getValueType() == MVT::i8 ||
8237 LHS.getValueType() == MVT::i16)
8238 LHS = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, LHS);
8240 // If the operand types disagree, extend the shift amount to match. Since
8241 // BT ignores high bits (like shifts) we can use anyextend.
8242 if (LHS.getValueType() != RHS.getValueType())
8243 RHS = DAG.getNode(ISD::ANY_EXTEND, dl, LHS.getValueType(), RHS);
8245 SDValue BT = DAG.getNode(X86ISD::BT, dl, MVT::i32, LHS, RHS);
8246 unsigned Cond = CC == ISD::SETEQ ? X86::COND_AE : X86::COND_B;
8247 return DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
8248 DAG.getConstant(Cond, MVT::i8), BT);
8254 SDValue X86TargetLowering::LowerSETCC(SDValue Op, SelectionDAG &DAG) const {
8256 if (Op.getValueType().isVector()) return LowerVSETCC(Op, DAG);
8258 assert(Op.getValueType() == MVT::i8 && "SetCC type must be 8-bit integer");
8259 SDValue Op0 = Op.getOperand(0);
8260 SDValue Op1 = Op.getOperand(1);
8261 DebugLoc dl = Op.getDebugLoc();
8262 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(2))->get();
8264 // Optimize to BT if possible.
8265 // Lower (X & (1 << N)) == 0 to BT(X, N).
8266 // Lower ((X >>u N) & 1) != 0 to BT(X, N).
8267 // Lower ((X >>s N) & 1) != 0 to BT(X, N).
8268 if (Op0.getOpcode() == ISD::AND && Op0.hasOneUse() &&
8269 Op1.getOpcode() == ISD::Constant &&
8270 cast<ConstantSDNode>(Op1)->isNullValue() &&
8271 (CC == ISD::SETEQ || CC == ISD::SETNE)) {
8272 SDValue NewSetCC = LowerToBT(Op0, CC, dl, DAG);
8273 if (NewSetCC.getNode())
8277 // Look for X == 0, X == 1, X != 0, or X != 1. We can simplify some forms of
8279 if (Op1.getOpcode() == ISD::Constant &&
8280 (cast<ConstantSDNode>(Op1)->getZExtValue() == 1 ||
8281 cast<ConstantSDNode>(Op1)->isNullValue()) &&
8282 (CC == ISD::SETEQ || CC == ISD::SETNE)) {
8284 // If the input is a setcc, then reuse the input setcc or use a new one with
8285 // the inverted condition.
8286 if (Op0.getOpcode() == X86ISD::SETCC) {
8287 X86::CondCode CCode = (X86::CondCode)Op0.getConstantOperandVal(0);
8288 bool Invert = (CC == ISD::SETNE) ^
8289 cast<ConstantSDNode>(Op1)->isNullValue();
8290 if (!Invert) return Op0;
8292 CCode = X86::GetOppositeBranchCondition(CCode);
8293 return DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
8294 DAG.getConstant(CCode, MVT::i8), Op0.getOperand(1));
8298 bool isFP = Op1.getValueType().isFloatingPoint();
8299 unsigned X86CC = TranslateX86CC(CC, isFP, Op0, Op1, DAG);
8300 if (X86CC == X86::COND_INVALID)
8303 SDValue EFLAGS = EmitCmp(Op0, Op1, X86CC, DAG);
8304 return DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
8305 DAG.getConstant(X86CC, MVT::i8), EFLAGS);
8308 // Lower256IntVSETCC - Break a VSETCC 256-bit integer VSETCC into two new 128
8309 // ones, and then concatenate the result back.
8310 static SDValue Lower256IntVSETCC(SDValue Op, SelectionDAG &DAG) {
8311 EVT VT = Op.getValueType();
8313 assert(VT.getSizeInBits() == 256 && Op.getOpcode() == ISD::SETCC &&
8314 "Unsupported value type for operation");
8316 int NumElems = VT.getVectorNumElements();
8317 DebugLoc dl = Op.getDebugLoc();
8318 SDValue CC = Op.getOperand(2);
8319 SDValue Idx0 = DAG.getConstant(0, MVT::i32);
8320 SDValue Idx1 = DAG.getConstant(NumElems/2, MVT::i32);
8322 // Extract the LHS vectors
8323 SDValue LHS = Op.getOperand(0);
8324 SDValue LHS1 = Extract128BitVector(LHS, Idx0, DAG, dl);
8325 SDValue LHS2 = Extract128BitVector(LHS, Idx1, DAG, dl);
8327 // Extract the RHS vectors
8328 SDValue RHS = Op.getOperand(1);
8329 SDValue RHS1 = Extract128BitVector(RHS, Idx0, DAG, dl);
8330 SDValue RHS2 = Extract128BitVector(RHS, Idx1, DAG, dl);
8332 // Issue the operation on the smaller types and concatenate the result back
8333 MVT EltVT = VT.getVectorElementType().getSimpleVT();
8334 EVT NewVT = MVT::getVectorVT(EltVT, NumElems/2);
8335 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT,
8336 DAG.getNode(Op.getOpcode(), dl, NewVT, LHS1, RHS1, CC),
8337 DAG.getNode(Op.getOpcode(), dl, NewVT, LHS2, RHS2, CC));
8341 SDValue X86TargetLowering::LowerVSETCC(SDValue Op, SelectionDAG &DAG) const {
8343 SDValue Op0 = Op.getOperand(0);
8344 SDValue Op1 = Op.getOperand(1);
8345 SDValue CC = Op.getOperand(2);
8346 EVT VT = Op.getValueType();
8347 ISD::CondCode SetCCOpcode = cast<CondCodeSDNode>(CC)->get();
8348 bool isFP = Op.getOperand(1).getValueType().isFloatingPoint();
8349 DebugLoc dl = Op.getDebugLoc();
8353 EVT EltVT = Op0.getValueType().getVectorElementType();
8354 assert(EltVT == MVT::f32 || EltVT == MVT::f64);
8356 unsigned Opc = EltVT == MVT::f32 ? X86ISD::CMPPS : X86ISD::CMPPD;
8359 // SSE Condition code mapping:
8368 switch (SetCCOpcode) {
8371 case ISD::SETEQ: SSECC = 0; break;
8373 case ISD::SETGT: Swap = true; // Fallthrough
8375 case ISD::SETOLT: SSECC = 1; break;
8377 case ISD::SETGE: Swap = true; // Fallthrough
8379 case ISD::SETOLE: SSECC = 2; break;
8380 case ISD::SETUO: SSECC = 3; break;
8382 case ISD::SETNE: SSECC = 4; break;
8383 case ISD::SETULE: Swap = true;
8384 case ISD::SETUGE: SSECC = 5; break;
8385 case ISD::SETULT: Swap = true;
8386 case ISD::SETUGT: SSECC = 6; break;
8387 case ISD::SETO: SSECC = 7; break;
8390 std::swap(Op0, Op1);
8392 // In the two special cases we can't handle, emit two comparisons.
8394 if (SetCCOpcode == ISD::SETUEQ) {
8396 UNORD = DAG.getNode(Opc, dl, VT, Op0, Op1, DAG.getConstant(3, MVT::i8));
8397 EQ = DAG.getNode(Opc, dl, VT, Op0, Op1, DAG.getConstant(0, MVT::i8));
8398 return DAG.getNode(ISD::OR, dl, VT, UNORD, EQ);
8399 } else if (SetCCOpcode == ISD::SETONE) {
8401 ORD = DAG.getNode(Opc, dl, VT, Op0, Op1, DAG.getConstant(7, MVT::i8));
8402 NEQ = DAG.getNode(Opc, dl, VT, Op0, Op1, DAG.getConstant(4, MVT::i8));
8403 return DAG.getNode(ISD::AND, dl, VT, ORD, NEQ);
8405 llvm_unreachable("Illegal FP comparison");
8407 // Handle all other FP comparisons here.
8408 return DAG.getNode(Opc, dl, VT, Op0, Op1, DAG.getConstant(SSECC, MVT::i8));
8411 // Break 256-bit integer vector compare into smaller ones.
8412 if (VT.getSizeInBits() == 256 && !Subtarget->hasAVX2())
8413 return Lower256IntVSETCC(Op, DAG);
8415 // We are handling one of the integer comparisons here. Since SSE only has
8416 // GT and EQ comparisons for integer, swapping operands and multiple
8417 // operations may be required for some comparisons.
8418 unsigned Opc = 0, EQOpc = 0, GTOpc = 0;
8419 bool Swap = false, Invert = false, FlipSigns = false;
8421 switch (VT.getVectorElementType().getSimpleVT().SimpleTy) {
8423 case MVT::i8: EQOpc = X86ISD::PCMPEQB; GTOpc = X86ISD::PCMPGTB; break;
8424 case MVT::i16: EQOpc = X86ISD::PCMPEQW; GTOpc = X86ISD::PCMPGTW; break;
8425 case MVT::i32: EQOpc = X86ISD::PCMPEQD; GTOpc = X86ISD::PCMPGTD; break;
8426 case MVT::i64: EQOpc = X86ISD::PCMPEQQ; GTOpc = X86ISD::PCMPGTQ; break;
8429 switch (SetCCOpcode) {
8431 case ISD::SETNE: Invert = true;
8432 case ISD::SETEQ: Opc = EQOpc; break;
8433 case ISD::SETLT: Swap = true;
8434 case ISD::SETGT: Opc = GTOpc; break;
8435 case ISD::SETGE: Swap = true;
8436 case ISD::SETLE: Opc = GTOpc; Invert = true; break;
8437 case ISD::SETULT: Swap = true;
8438 case ISD::SETUGT: Opc = GTOpc; FlipSigns = true; break;
8439 case ISD::SETUGE: Swap = true;
8440 case ISD::SETULE: Opc = GTOpc; FlipSigns = true; Invert = true; break;
8443 std::swap(Op0, Op1);
8445 // Check that the operation in question is available (most are plain SSE2,
8446 // but PCMPGTQ and PCMPEQQ have different requirements).
8447 if (Opc == X86ISD::PCMPGTQ && !Subtarget->hasSSE42())
8449 if (Opc == X86ISD::PCMPEQQ && !Subtarget->hasSSE41())
8452 // Since SSE has no unsigned integer comparisons, we need to flip the sign
8453 // bits of the inputs before performing those operations.
8455 EVT EltVT = VT.getVectorElementType();
8456 SDValue SignBit = DAG.getConstant(APInt::getSignBit(EltVT.getSizeInBits()),
8458 std::vector<SDValue> SignBits(VT.getVectorNumElements(), SignBit);
8459 SDValue SignVec = DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &SignBits[0],
8461 Op0 = DAG.getNode(ISD::XOR, dl, VT, Op0, SignVec);
8462 Op1 = DAG.getNode(ISD::XOR, dl, VT, Op1, SignVec);
8465 SDValue Result = DAG.getNode(Opc, dl, VT, Op0, Op1);
8467 // If the logical-not of the result is required, perform that now.
8469 Result = DAG.getNOT(dl, Result, VT);
8474 // isX86LogicalCmp - Return true if opcode is a X86 logical comparison.
8475 static bool isX86LogicalCmp(SDValue Op) {
8476 unsigned Opc = Op.getNode()->getOpcode();
8477 if (Opc == X86ISD::CMP || Opc == X86ISD::COMI || Opc == X86ISD::UCOMI)
8479 if (Op.getResNo() == 1 &&
8480 (Opc == X86ISD::ADD ||
8481 Opc == X86ISD::SUB ||
8482 Opc == X86ISD::ADC ||
8483 Opc == X86ISD::SBB ||
8484 Opc == X86ISD::SMUL ||
8485 Opc == X86ISD::UMUL ||
8486 Opc == X86ISD::INC ||
8487 Opc == X86ISD::DEC ||
8488 Opc == X86ISD::OR ||
8489 Opc == X86ISD::XOR ||
8490 Opc == X86ISD::AND))
8493 if (Op.getResNo() == 2 && Opc == X86ISD::UMUL)
8499 static bool isZero(SDValue V) {
8500 ConstantSDNode *C = dyn_cast<ConstantSDNode>(V);
8501 return C && C->isNullValue();
8504 static bool isAllOnes(SDValue V) {
8505 ConstantSDNode *C = dyn_cast<ConstantSDNode>(V);
8506 return C && C->isAllOnesValue();
8509 SDValue X86TargetLowering::LowerSELECT(SDValue Op, SelectionDAG &DAG) const {
8510 bool addTest = true;
8511 SDValue Cond = Op.getOperand(0);
8512 SDValue Op1 = Op.getOperand(1);
8513 SDValue Op2 = Op.getOperand(2);
8514 DebugLoc DL = Op.getDebugLoc();
8517 if (Cond.getOpcode() == ISD::SETCC) {
8518 SDValue NewCond = LowerSETCC(Cond, DAG);
8519 if (NewCond.getNode())
8523 // (select (x == 0), -1, y) -> (sign_bit (x - 1)) | y
8524 // (select (x == 0), y, -1) -> ~(sign_bit (x - 1)) | y
8525 // (select (x != 0), y, -1) -> (sign_bit (x - 1)) | y
8526 // (select (x != 0), -1, y) -> ~(sign_bit (x - 1)) | y
8527 if (Cond.getOpcode() == X86ISD::SETCC &&
8528 Cond.getOperand(1).getOpcode() == X86ISD::CMP &&
8529 isZero(Cond.getOperand(1).getOperand(1))) {
8530 SDValue Cmp = Cond.getOperand(1);
8532 unsigned CondCode =cast<ConstantSDNode>(Cond.getOperand(0))->getZExtValue();
8534 if ((isAllOnes(Op1) || isAllOnes(Op2)) &&
8535 (CondCode == X86::COND_E || CondCode == X86::COND_NE)) {
8536 SDValue Y = isAllOnes(Op2) ? Op1 : Op2;
8538 SDValue CmpOp0 = Cmp.getOperand(0);
8539 Cmp = DAG.getNode(X86ISD::CMP, DL, MVT::i32,
8540 CmpOp0, DAG.getConstant(1, CmpOp0.getValueType()));
8542 SDValue Res = // Res = 0 or -1.
8543 DAG.getNode(X86ISD::SETCC_CARRY, DL, Op.getValueType(),
8544 DAG.getConstant(X86::COND_B, MVT::i8), Cmp);
8546 if (isAllOnes(Op1) != (CondCode == X86::COND_E))
8547 Res = DAG.getNOT(DL, Res, Res.getValueType());
8549 ConstantSDNode *N2C = dyn_cast<ConstantSDNode>(Op2);
8550 if (N2C == 0 || !N2C->isNullValue())
8551 Res = DAG.getNode(ISD::OR, DL, Res.getValueType(), Res, Y);
8556 // Look past (and (setcc_carry (cmp ...)), 1).
8557 if (Cond.getOpcode() == ISD::AND &&
8558 Cond.getOperand(0).getOpcode() == X86ISD::SETCC_CARRY) {
8559 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Cond.getOperand(1));
8560 if (C && C->getAPIntValue() == 1)
8561 Cond = Cond.getOperand(0);
8564 // If condition flag is set by a X86ISD::CMP, then use it as the condition
8565 // setting operand in place of the X86ISD::SETCC.
8566 unsigned CondOpcode = Cond.getOpcode();
8567 if (CondOpcode == X86ISD::SETCC ||
8568 CondOpcode == X86ISD::SETCC_CARRY) {
8569 CC = Cond.getOperand(0);
8571 SDValue Cmp = Cond.getOperand(1);
8572 unsigned Opc = Cmp.getOpcode();
8573 EVT VT = Op.getValueType();
8575 bool IllegalFPCMov = false;
8576 if (VT.isFloatingPoint() && !VT.isVector() &&
8577 !isScalarFPTypeInSSEReg(VT)) // FPStack?
8578 IllegalFPCMov = !hasFPCMov(cast<ConstantSDNode>(CC)->getSExtValue());
8580 if ((isX86LogicalCmp(Cmp) && !IllegalFPCMov) ||
8581 Opc == X86ISD::BT) { // FIXME
8585 } else if (CondOpcode == ISD::USUBO || CondOpcode == ISD::SSUBO ||
8586 CondOpcode == ISD::UADDO || CondOpcode == ISD::SADDO ||
8587 ((CondOpcode == ISD::UMULO || CondOpcode == ISD::SMULO) &&
8588 Cond.getOperand(0).getValueType() != MVT::i8)) {
8589 SDValue LHS = Cond.getOperand(0);
8590 SDValue RHS = Cond.getOperand(1);
8594 switch (CondOpcode) {
8595 case ISD::UADDO: X86Opcode = X86ISD::ADD; X86Cond = X86::COND_B; break;
8596 case ISD::SADDO: X86Opcode = X86ISD::ADD; X86Cond = X86::COND_O; break;
8597 case ISD::USUBO: X86Opcode = X86ISD::SUB; X86Cond = X86::COND_B; break;
8598 case ISD::SSUBO: X86Opcode = X86ISD::SUB; X86Cond = X86::COND_O; break;
8599 case ISD::UMULO: X86Opcode = X86ISD::UMUL; X86Cond = X86::COND_O; break;
8600 case ISD::SMULO: X86Opcode = X86ISD::SMUL; X86Cond = X86::COND_O; break;
8601 default: llvm_unreachable("unexpected overflowing operator");
8603 if (CondOpcode == ISD::UMULO)
8604 VTs = DAG.getVTList(LHS.getValueType(), LHS.getValueType(),
8607 VTs = DAG.getVTList(LHS.getValueType(), MVT::i32);
8609 SDValue X86Op = DAG.getNode(X86Opcode, DL, VTs, LHS, RHS);
8611 if (CondOpcode == ISD::UMULO)
8612 Cond = X86Op.getValue(2);
8614 Cond = X86Op.getValue(1);
8616 CC = DAG.getConstant(X86Cond, MVT::i8);
8621 // Look pass the truncate.
8622 if (Cond.getOpcode() == ISD::TRUNCATE)
8623 Cond = Cond.getOperand(0);
8625 // We know the result of AND is compared against zero. Try to match
8627 if (Cond.getOpcode() == ISD::AND && Cond.hasOneUse()) {
8628 SDValue NewSetCC = LowerToBT(Cond, ISD::SETNE, DL, DAG);
8629 if (NewSetCC.getNode()) {
8630 CC = NewSetCC.getOperand(0);
8631 Cond = NewSetCC.getOperand(1);
8638 CC = DAG.getConstant(X86::COND_NE, MVT::i8);
8639 Cond = EmitTest(Cond, X86::COND_NE, DAG);
8642 // a < b ? -1 : 0 -> RES = ~setcc_carry
8643 // a < b ? 0 : -1 -> RES = setcc_carry
8644 // a >= b ? -1 : 0 -> RES = setcc_carry
8645 // a >= b ? 0 : -1 -> RES = ~setcc_carry
8646 if (Cond.getOpcode() == X86ISD::CMP) {
8647 unsigned CondCode = cast<ConstantSDNode>(CC)->getZExtValue();
8649 if ((CondCode == X86::COND_AE || CondCode == X86::COND_B) &&
8650 (isAllOnes(Op1) || isAllOnes(Op2)) && (isZero(Op1) || isZero(Op2))) {
8651 SDValue Res = DAG.getNode(X86ISD::SETCC_CARRY, DL, Op.getValueType(),
8652 DAG.getConstant(X86::COND_B, MVT::i8), Cond);
8653 if (isAllOnes(Op1) != (CondCode == X86::COND_B))
8654 return DAG.getNOT(DL, Res, Res.getValueType());
8659 // X86ISD::CMOV means set the result (which is operand 1) to the RHS if
8660 // condition is true.
8661 SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::Glue);
8662 SDValue Ops[] = { Op2, Op1, CC, Cond };
8663 return DAG.getNode(X86ISD::CMOV, DL, VTs, Ops, array_lengthof(Ops));
8666 // isAndOrOfSingleUseSetCCs - Return true if node is an ISD::AND or
8667 // ISD::OR of two X86ISD::SETCC nodes each of which has no other use apart
8668 // from the AND / OR.
8669 static bool isAndOrOfSetCCs(SDValue Op, unsigned &Opc) {
8670 Opc = Op.getOpcode();
8671 if (Opc != ISD::OR && Opc != ISD::AND)
8673 return (Op.getOperand(0).getOpcode() == X86ISD::SETCC &&
8674 Op.getOperand(0).hasOneUse() &&
8675 Op.getOperand(1).getOpcode() == X86ISD::SETCC &&
8676 Op.getOperand(1).hasOneUse());
8679 // isXor1OfSetCC - Return true if node is an ISD::XOR of a X86ISD::SETCC and
8680 // 1 and that the SETCC node has a single use.
8681 static bool isXor1OfSetCC(SDValue Op) {
8682 if (Op.getOpcode() != ISD::XOR)
8684 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(Op.getOperand(1));
8685 if (N1C && N1C->getAPIntValue() == 1) {
8686 return Op.getOperand(0).getOpcode() == X86ISD::SETCC &&
8687 Op.getOperand(0).hasOneUse();
8692 SDValue X86TargetLowering::LowerBRCOND(SDValue Op, SelectionDAG &DAG) const {
8693 bool addTest = true;
8694 SDValue Chain = Op.getOperand(0);
8695 SDValue Cond = Op.getOperand(1);
8696 SDValue Dest = Op.getOperand(2);
8697 DebugLoc dl = Op.getDebugLoc();
8699 bool Inverted = false;
8701 if (Cond.getOpcode() == ISD::SETCC) {
8702 // Check for setcc([su]{add,sub,mul}o == 0).
8703 if (cast<CondCodeSDNode>(Cond.getOperand(2))->get() == ISD::SETEQ &&
8704 isa<ConstantSDNode>(Cond.getOperand(1)) &&
8705 cast<ConstantSDNode>(Cond.getOperand(1))->isNullValue() &&
8706 Cond.getOperand(0).getResNo() == 1 &&
8707 (Cond.getOperand(0).getOpcode() == ISD::SADDO ||
8708 Cond.getOperand(0).getOpcode() == ISD::UADDO ||
8709 Cond.getOperand(0).getOpcode() == ISD::SSUBO ||
8710 Cond.getOperand(0).getOpcode() == ISD::USUBO ||
8711 Cond.getOperand(0).getOpcode() == ISD::SMULO ||
8712 Cond.getOperand(0).getOpcode() == ISD::UMULO)) {
8714 Cond = Cond.getOperand(0);
8716 SDValue NewCond = LowerSETCC(Cond, DAG);
8717 if (NewCond.getNode())
8722 // FIXME: LowerXALUO doesn't handle these!!
8723 else if (Cond.getOpcode() == X86ISD::ADD ||
8724 Cond.getOpcode() == X86ISD::SUB ||
8725 Cond.getOpcode() == X86ISD::SMUL ||
8726 Cond.getOpcode() == X86ISD::UMUL)
8727 Cond = LowerXALUO(Cond, DAG);
8730 // Look pass (and (setcc_carry (cmp ...)), 1).
8731 if (Cond.getOpcode() == ISD::AND &&
8732 Cond.getOperand(0).getOpcode() == X86ISD::SETCC_CARRY) {
8733 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Cond.getOperand(1));
8734 if (C && C->getAPIntValue() == 1)
8735 Cond = Cond.getOperand(0);
8738 // If condition flag is set by a X86ISD::CMP, then use it as the condition
8739 // setting operand in place of the X86ISD::SETCC.
8740 unsigned CondOpcode = Cond.getOpcode();
8741 if (CondOpcode == X86ISD::SETCC ||
8742 CondOpcode == X86ISD::SETCC_CARRY) {
8743 CC = Cond.getOperand(0);
8745 SDValue Cmp = Cond.getOperand(1);
8746 unsigned Opc = Cmp.getOpcode();
8747 // FIXME: WHY THE SPECIAL CASING OF LogicalCmp??
8748 if (isX86LogicalCmp(Cmp) || Opc == X86ISD::BT) {
8752 switch (cast<ConstantSDNode>(CC)->getZExtValue()) {
8756 // These can only come from an arithmetic instruction with overflow,
8757 // e.g. SADDO, UADDO.
8758 Cond = Cond.getNode()->getOperand(1);
8764 CondOpcode = Cond.getOpcode();
8765 if (CondOpcode == ISD::UADDO || CondOpcode == ISD::SADDO ||
8766 CondOpcode == ISD::USUBO || CondOpcode == ISD::SSUBO ||
8767 ((CondOpcode == ISD::UMULO || CondOpcode == ISD::SMULO) &&
8768 Cond.getOperand(0).getValueType() != MVT::i8)) {
8769 SDValue LHS = Cond.getOperand(0);
8770 SDValue RHS = Cond.getOperand(1);
8774 switch (CondOpcode) {
8775 case ISD::UADDO: X86Opcode = X86ISD::ADD; X86Cond = X86::COND_B; break;
8776 case ISD::SADDO: X86Opcode = X86ISD::ADD; X86Cond = X86::COND_O; break;
8777 case ISD::USUBO: X86Opcode = X86ISD::SUB; X86Cond = X86::COND_B; break;
8778 case ISD::SSUBO: X86Opcode = X86ISD::SUB; X86Cond = X86::COND_O; break;
8779 case ISD::UMULO: X86Opcode = X86ISD::UMUL; X86Cond = X86::COND_O; break;
8780 case ISD::SMULO: X86Opcode = X86ISD::SMUL; X86Cond = X86::COND_O; break;
8781 default: llvm_unreachable("unexpected overflowing operator");
8784 X86Cond = X86::GetOppositeBranchCondition((X86::CondCode)X86Cond);
8785 if (CondOpcode == ISD::UMULO)
8786 VTs = DAG.getVTList(LHS.getValueType(), LHS.getValueType(),
8789 VTs = DAG.getVTList(LHS.getValueType(), MVT::i32);
8791 SDValue X86Op = DAG.getNode(X86Opcode, dl, VTs, LHS, RHS);
8793 if (CondOpcode == ISD::UMULO)
8794 Cond = X86Op.getValue(2);
8796 Cond = X86Op.getValue(1);
8798 CC = DAG.getConstant(X86Cond, MVT::i8);
8802 if (Cond.hasOneUse() && isAndOrOfSetCCs(Cond, CondOpc)) {
8803 SDValue Cmp = Cond.getOperand(0).getOperand(1);
8804 if (CondOpc == ISD::OR) {
8805 // Also, recognize the pattern generated by an FCMP_UNE. We can emit
8806 // two branches instead of an explicit OR instruction with a
8808 if (Cmp == Cond.getOperand(1).getOperand(1) &&
8809 isX86LogicalCmp(Cmp)) {
8810 CC = Cond.getOperand(0).getOperand(0);
8811 Chain = DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
8812 Chain, Dest, CC, Cmp);
8813 CC = Cond.getOperand(1).getOperand(0);
8817 } else { // ISD::AND
8818 // Also, recognize the pattern generated by an FCMP_OEQ. We can emit
8819 // two branches instead of an explicit AND instruction with a
8820 // separate test. However, we only do this if this block doesn't
8821 // have a fall-through edge, because this requires an explicit
8822 // jmp when the condition is false.
8823 if (Cmp == Cond.getOperand(1).getOperand(1) &&
8824 isX86LogicalCmp(Cmp) &&
8825 Op.getNode()->hasOneUse()) {
8826 X86::CondCode CCode =
8827 (X86::CondCode)Cond.getOperand(0).getConstantOperandVal(0);
8828 CCode = X86::GetOppositeBranchCondition(CCode);
8829 CC = DAG.getConstant(CCode, MVT::i8);
8830 SDNode *User = *Op.getNode()->use_begin();
8831 // Look for an unconditional branch following this conditional branch.
8832 // We need this because we need to reverse the successors in order
8833 // to implement FCMP_OEQ.
8834 if (User->getOpcode() == ISD::BR) {
8835 SDValue FalseBB = User->getOperand(1);
8837 DAG.UpdateNodeOperands(User, User->getOperand(0), Dest);
8838 assert(NewBR == User);
8842 Chain = DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
8843 Chain, Dest, CC, Cmp);
8844 X86::CondCode CCode =
8845 (X86::CondCode)Cond.getOperand(1).getConstantOperandVal(0);
8846 CCode = X86::GetOppositeBranchCondition(CCode);
8847 CC = DAG.getConstant(CCode, MVT::i8);
8853 } else if (Cond.hasOneUse() && isXor1OfSetCC(Cond)) {
8854 // Recognize for xorb (setcc), 1 patterns. The xor inverts the condition.
8855 // It should be transformed during dag combiner except when the condition
8856 // is set by a arithmetics with overflow node.
8857 X86::CondCode CCode =
8858 (X86::CondCode)Cond.getOperand(0).getConstantOperandVal(0);
8859 CCode = X86::GetOppositeBranchCondition(CCode);
8860 CC = DAG.getConstant(CCode, MVT::i8);
8861 Cond = Cond.getOperand(0).getOperand(1);
8863 } else if (Cond.getOpcode() == ISD::SETCC &&
8864 cast<CondCodeSDNode>(Cond.getOperand(2))->get() == ISD::SETOEQ) {
8865 // For FCMP_OEQ, we can emit
8866 // two branches instead of an explicit AND instruction with a
8867 // separate test. However, we only do this if this block doesn't
8868 // have a fall-through edge, because this requires an explicit
8869 // jmp when the condition is false.
8870 if (Op.getNode()->hasOneUse()) {
8871 SDNode *User = *Op.getNode()->use_begin();
8872 // Look for an unconditional branch following this conditional branch.
8873 // We need this because we need to reverse the successors in order
8874 // to implement FCMP_OEQ.
8875 if (User->getOpcode() == ISD::BR) {
8876 SDValue FalseBB = User->getOperand(1);
8878 DAG.UpdateNodeOperands(User, User->getOperand(0), Dest);
8879 assert(NewBR == User);
8883 SDValue Cmp = DAG.getNode(X86ISD::CMP, dl, MVT::i32,
8884 Cond.getOperand(0), Cond.getOperand(1));
8885 CC = DAG.getConstant(X86::COND_NE, MVT::i8);
8886 Chain = DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
8887 Chain, Dest, CC, Cmp);
8888 CC = DAG.getConstant(X86::COND_P, MVT::i8);
8893 } else if (Cond.getOpcode() == ISD::SETCC &&
8894 cast<CondCodeSDNode>(Cond.getOperand(2))->get() == ISD::SETUNE) {
8895 // For FCMP_UNE, we can emit
8896 // two branches instead of an explicit AND instruction with a
8897 // separate test. However, we only do this if this block doesn't
8898 // have a fall-through edge, because this requires an explicit
8899 // jmp when the condition is false.
8900 if (Op.getNode()->hasOneUse()) {
8901 SDNode *User = *Op.getNode()->use_begin();
8902 // Look for an unconditional branch following this conditional branch.
8903 // We need this because we need to reverse the successors in order
8904 // to implement FCMP_UNE.
8905 if (User->getOpcode() == ISD::BR) {
8906 SDValue FalseBB = User->getOperand(1);
8908 DAG.UpdateNodeOperands(User, User->getOperand(0), Dest);
8909 assert(NewBR == User);
8912 SDValue Cmp = DAG.getNode(X86ISD::CMP, dl, MVT::i32,
8913 Cond.getOperand(0), Cond.getOperand(1));
8914 CC = DAG.getConstant(X86::COND_NE, MVT::i8);
8915 Chain = DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
8916 Chain, Dest, CC, Cmp);
8917 CC = DAG.getConstant(X86::COND_NP, MVT::i8);
8927 // Look pass the truncate.
8928 if (Cond.getOpcode() == ISD::TRUNCATE)
8929 Cond = Cond.getOperand(0);
8931 // We know the result of AND is compared against zero. Try to match
8933 if (Cond.getOpcode() == ISD::AND && Cond.hasOneUse()) {
8934 SDValue NewSetCC = LowerToBT(Cond, ISD::SETNE, dl, DAG);
8935 if (NewSetCC.getNode()) {
8936 CC = NewSetCC.getOperand(0);
8937 Cond = NewSetCC.getOperand(1);
8944 CC = DAG.getConstant(X86::COND_NE, MVT::i8);
8945 Cond = EmitTest(Cond, X86::COND_NE, DAG);
8947 return DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
8948 Chain, Dest, CC, Cond);
8952 // Lower dynamic stack allocation to _alloca call for Cygwin/Mingw targets.
8953 // Calls to _alloca is needed to probe the stack when allocating more than 4k
8954 // bytes in one go. Touching the stack at 4K increments is necessary to ensure
8955 // that the guard pages used by the OS virtual memory manager are allocated in
8956 // correct sequence.
8958 X86TargetLowering::LowerDYNAMIC_STACKALLOC(SDValue Op,
8959 SelectionDAG &DAG) const {
8960 assert((Subtarget->isTargetCygMing() || Subtarget->isTargetWindows() ||
8961 getTargetMachine().Options.EnableSegmentedStacks) &&
8962 "This should be used only on Windows targets or when segmented stacks "
8964 assert(!Subtarget->isTargetEnvMacho() && "Not implemented");
8965 DebugLoc dl = Op.getDebugLoc();
8968 SDValue Chain = Op.getOperand(0);
8969 SDValue Size = Op.getOperand(1);
8970 // FIXME: Ensure alignment here
8972 bool Is64Bit = Subtarget->is64Bit();
8973 EVT SPTy = Is64Bit ? MVT::i64 : MVT::i32;
8975 if (getTargetMachine().Options.EnableSegmentedStacks) {
8976 MachineFunction &MF = DAG.getMachineFunction();
8977 MachineRegisterInfo &MRI = MF.getRegInfo();
8980 // The 64 bit implementation of segmented stacks needs to clobber both r10
8981 // r11. This makes it impossible to use it along with nested parameters.
8982 const Function *F = MF.getFunction();
8984 for (Function::const_arg_iterator I = F->arg_begin(), E = F->arg_end();
8986 if (I->hasNestAttr())
8987 report_fatal_error("Cannot use segmented stacks with functions that "
8988 "have nested arguments.");
8991 const TargetRegisterClass *AddrRegClass =
8992 getRegClassFor(Subtarget->is64Bit() ? MVT::i64:MVT::i32);
8993 unsigned Vreg = MRI.createVirtualRegister(AddrRegClass);
8994 Chain = DAG.getCopyToReg(Chain, dl, Vreg, Size);
8995 SDValue Value = DAG.getNode(X86ISD::SEG_ALLOCA, dl, SPTy, Chain,
8996 DAG.getRegister(Vreg, SPTy));
8997 SDValue Ops1[2] = { Value, Chain };
8998 return DAG.getMergeValues(Ops1, 2, dl);
9001 unsigned Reg = (Subtarget->is64Bit() ? X86::RAX : X86::EAX);
9003 Chain = DAG.getCopyToReg(Chain, dl, Reg, Size, Flag);
9004 Flag = Chain.getValue(1);
9005 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
9007 Chain = DAG.getNode(X86ISD::WIN_ALLOCA, dl, NodeTys, Chain, Flag);
9008 Flag = Chain.getValue(1);
9010 Chain = DAG.getCopyFromReg(Chain, dl, X86StackPtr, SPTy).getValue(1);
9012 SDValue Ops1[2] = { Chain.getValue(0), Chain };
9013 return DAG.getMergeValues(Ops1, 2, dl);
9017 SDValue X86TargetLowering::LowerVASTART(SDValue Op, SelectionDAG &DAG) const {
9018 MachineFunction &MF = DAG.getMachineFunction();
9019 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
9021 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
9022 DebugLoc DL = Op.getDebugLoc();
9024 if (!Subtarget->is64Bit() || Subtarget->isTargetWin64()) {
9025 // vastart just stores the address of the VarArgsFrameIndex slot into the
9026 // memory location argument.
9027 SDValue FR = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(),
9029 return DAG.getStore(Op.getOperand(0), DL, FR, Op.getOperand(1),
9030 MachinePointerInfo(SV), false, false, 0);
9034 // gp_offset (0 - 6 * 8)
9035 // fp_offset (48 - 48 + 8 * 16)
9036 // overflow_arg_area (point to parameters coming in memory).
9038 SmallVector<SDValue, 8> MemOps;
9039 SDValue FIN = Op.getOperand(1);
9041 SDValue Store = DAG.getStore(Op.getOperand(0), DL,
9042 DAG.getConstant(FuncInfo->getVarArgsGPOffset(),
9044 FIN, MachinePointerInfo(SV), false, false, 0);
9045 MemOps.push_back(Store);
9048 FIN = DAG.getNode(ISD::ADD, DL, getPointerTy(),
9049 FIN, DAG.getIntPtrConstant(4));
9050 Store = DAG.getStore(Op.getOperand(0), DL,
9051 DAG.getConstant(FuncInfo->getVarArgsFPOffset(),
9053 FIN, MachinePointerInfo(SV, 4), false, false, 0);
9054 MemOps.push_back(Store);
9056 // Store ptr to overflow_arg_area
9057 FIN = DAG.getNode(ISD::ADD, DL, getPointerTy(),
9058 FIN, DAG.getIntPtrConstant(4));
9059 SDValue OVFIN = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(),
9061 Store = DAG.getStore(Op.getOperand(0), DL, OVFIN, FIN,
9062 MachinePointerInfo(SV, 8),
9064 MemOps.push_back(Store);
9066 // Store ptr to reg_save_area.
9067 FIN = DAG.getNode(ISD::ADD, DL, getPointerTy(),
9068 FIN, DAG.getIntPtrConstant(8));
9069 SDValue RSFIN = DAG.getFrameIndex(FuncInfo->getRegSaveFrameIndex(),
9071 Store = DAG.getStore(Op.getOperand(0), DL, RSFIN, FIN,
9072 MachinePointerInfo(SV, 16), false, false, 0);
9073 MemOps.push_back(Store);
9074 return DAG.getNode(ISD::TokenFactor, DL, MVT::Other,
9075 &MemOps[0], MemOps.size());
9078 SDValue X86TargetLowering::LowerVAARG(SDValue Op, SelectionDAG &DAG) const {
9079 assert(Subtarget->is64Bit() &&
9080 "LowerVAARG only handles 64-bit va_arg!");
9081 assert((Subtarget->isTargetLinux() ||
9082 Subtarget->isTargetDarwin()) &&
9083 "Unhandled target in LowerVAARG");
9084 assert(Op.getNode()->getNumOperands() == 4);
9085 SDValue Chain = Op.getOperand(0);
9086 SDValue SrcPtr = Op.getOperand(1);
9087 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
9088 unsigned Align = Op.getConstantOperandVal(3);
9089 DebugLoc dl = Op.getDebugLoc();
9091 EVT ArgVT = Op.getNode()->getValueType(0);
9092 Type *ArgTy = ArgVT.getTypeForEVT(*DAG.getContext());
9093 uint32_t ArgSize = getTargetData()->getTypeAllocSize(ArgTy);
9096 // Decide which area this value should be read from.
9097 // TODO: Implement the AMD64 ABI in its entirety. This simple
9098 // selection mechanism works only for the basic types.
9099 if (ArgVT == MVT::f80) {
9100 llvm_unreachable("va_arg for f80 not yet implemented");
9101 } else if (ArgVT.isFloatingPoint() && ArgSize <= 16 /*bytes*/) {
9102 ArgMode = 2; // Argument passed in XMM register. Use fp_offset.
9103 } else if (ArgVT.isInteger() && ArgSize <= 32 /*bytes*/) {
9104 ArgMode = 1; // Argument passed in GPR64 register(s). Use gp_offset.
9106 llvm_unreachable("Unhandled argument type in LowerVAARG");
9110 // Sanity Check: Make sure using fp_offset makes sense.
9111 assert(!getTargetMachine().Options.UseSoftFloat &&
9112 !(DAG.getMachineFunction()
9113 .getFunction()->hasFnAttr(Attribute::NoImplicitFloat)) &&
9114 Subtarget->hasSSE1());
9117 // Insert VAARG_64 node into the DAG
9118 // VAARG_64 returns two values: Variable Argument Address, Chain
9119 SmallVector<SDValue, 11> InstOps;
9120 InstOps.push_back(Chain);
9121 InstOps.push_back(SrcPtr);
9122 InstOps.push_back(DAG.getConstant(ArgSize, MVT::i32));
9123 InstOps.push_back(DAG.getConstant(ArgMode, MVT::i8));
9124 InstOps.push_back(DAG.getConstant(Align, MVT::i32));
9125 SDVTList VTs = DAG.getVTList(getPointerTy(), MVT::Other);
9126 SDValue VAARG = DAG.getMemIntrinsicNode(X86ISD::VAARG_64, dl,
9127 VTs, &InstOps[0], InstOps.size(),
9129 MachinePointerInfo(SV),
9134 Chain = VAARG.getValue(1);
9136 // Load the next argument and return it
9137 return DAG.getLoad(ArgVT, dl,
9140 MachinePointerInfo(),
9141 false, false, false, 0);
9144 SDValue X86TargetLowering::LowerVACOPY(SDValue Op, SelectionDAG &DAG) const {
9145 // X86-64 va_list is a struct { i32, i32, i8*, i8* }.
9146 assert(Subtarget->is64Bit() && "This code only handles 64-bit va_copy!");
9147 SDValue Chain = Op.getOperand(0);
9148 SDValue DstPtr = Op.getOperand(1);
9149 SDValue SrcPtr = Op.getOperand(2);
9150 const Value *DstSV = cast<SrcValueSDNode>(Op.getOperand(3))->getValue();
9151 const Value *SrcSV = cast<SrcValueSDNode>(Op.getOperand(4))->getValue();
9152 DebugLoc DL = Op.getDebugLoc();
9154 return DAG.getMemcpy(Chain, DL, DstPtr, SrcPtr,
9155 DAG.getIntPtrConstant(24), 8, /*isVolatile*/false,
9157 MachinePointerInfo(DstSV), MachinePointerInfo(SrcSV));
9161 X86TargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) const {
9162 DebugLoc dl = Op.getDebugLoc();
9163 unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
9165 default: return SDValue(); // Don't custom lower most intrinsics.
9166 // Comparison intrinsics.
9167 case Intrinsic::x86_sse_comieq_ss:
9168 case Intrinsic::x86_sse_comilt_ss:
9169 case Intrinsic::x86_sse_comile_ss:
9170 case Intrinsic::x86_sse_comigt_ss:
9171 case Intrinsic::x86_sse_comige_ss:
9172 case Intrinsic::x86_sse_comineq_ss:
9173 case Intrinsic::x86_sse_ucomieq_ss:
9174 case Intrinsic::x86_sse_ucomilt_ss:
9175 case Intrinsic::x86_sse_ucomile_ss:
9176 case Intrinsic::x86_sse_ucomigt_ss:
9177 case Intrinsic::x86_sse_ucomige_ss:
9178 case Intrinsic::x86_sse_ucomineq_ss:
9179 case Intrinsic::x86_sse2_comieq_sd:
9180 case Intrinsic::x86_sse2_comilt_sd:
9181 case Intrinsic::x86_sse2_comile_sd:
9182 case Intrinsic::x86_sse2_comigt_sd:
9183 case Intrinsic::x86_sse2_comige_sd:
9184 case Intrinsic::x86_sse2_comineq_sd:
9185 case Intrinsic::x86_sse2_ucomieq_sd:
9186 case Intrinsic::x86_sse2_ucomilt_sd:
9187 case Intrinsic::x86_sse2_ucomile_sd:
9188 case Intrinsic::x86_sse2_ucomigt_sd:
9189 case Intrinsic::x86_sse2_ucomige_sd:
9190 case Intrinsic::x86_sse2_ucomineq_sd: {
9192 ISD::CondCode CC = ISD::SETCC_INVALID;
9195 case Intrinsic::x86_sse_comieq_ss:
9196 case Intrinsic::x86_sse2_comieq_sd:
9200 case Intrinsic::x86_sse_comilt_ss:
9201 case Intrinsic::x86_sse2_comilt_sd:
9205 case Intrinsic::x86_sse_comile_ss:
9206 case Intrinsic::x86_sse2_comile_sd:
9210 case Intrinsic::x86_sse_comigt_ss:
9211 case Intrinsic::x86_sse2_comigt_sd:
9215 case Intrinsic::x86_sse_comige_ss:
9216 case Intrinsic::x86_sse2_comige_sd:
9220 case Intrinsic::x86_sse_comineq_ss:
9221 case Intrinsic::x86_sse2_comineq_sd:
9225 case Intrinsic::x86_sse_ucomieq_ss:
9226 case Intrinsic::x86_sse2_ucomieq_sd:
9227 Opc = X86ISD::UCOMI;
9230 case Intrinsic::x86_sse_ucomilt_ss:
9231 case Intrinsic::x86_sse2_ucomilt_sd:
9232 Opc = X86ISD::UCOMI;
9235 case Intrinsic::x86_sse_ucomile_ss:
9236 case Intrinsic::x86_sse2_ucomile_sd:
9237 Opc = X86ISD::UCOMI;
9240 case Intrinsic::x86_sse_ucomigt_ss:
9241 case Intrinsic::x86_sse2_ucomigt_sd:
9242 Opc = X86ISD::UCOMI;
9245 case Intrinsic::x86_sse_ucomige_ss:
9246 case Intrinsic::x86_sse2_ucomige_sd:
9247 Opc = X86ISD::UCOMI;
9250 case Intrinsic::x86_sse_ucomineq_ss:
9251 case Intrinsic::x86_sse2_ucomineq_sd:
9252 Opc = X86ISD::UCOMI;
9257 SDValue LHS = Op.getOperand(1);
9258 SDValue RHS = Op.getOperand(2);
9259 unsigned X86CC = TranslateX86CC(CC, true, LHS, RHS, DAG);
9260 assert(X86CC != X86::COND_INVALID && "Unexpected illegal condition!");
9261 SDValue Cond = DAG.getNode(Opc, dl, MVT::i32, LHS, RHS);
9262 SDValue SetCC = DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
9263 DAG.getConstant(X86CC, MVT::i8), Cond);
9264 return DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, SetCC);
9266 // Arithmetic intrinsics.
9267 case Intrinsic::x86_sse3_hadd_ps:
9268 case Intrinsic::x86_sse3_hadd_pd:
9269 case Intrinsic::x86_avx_hadd_ps_256:
9270 case Intrinsic::x86_avx_hadd_pd_256:
9271 return DAG.getNode(X86ISD::FHADD, dl, Op.getValueType(),
9272 Op.getOperand(1), Op.getOperand(2));
9273 case Intrinsic::x86_sse3_hsub_ps:
9274 case Intrinsic::x86_sse3_hsub_pd:
9275 case Intrinsic::x86_avx_hsub_ps_256:
9276 case Intrinsic::x86_avx_hsub_pd_256:
9277 return DAG.getNode(X86ISD::FHSUB, dl, Op.getValueType(),
9278 Op.getOperand(1), Op.getOperand(2));
9279 case Intrinsic::x86_avx2_psllv_d:
9280 case Intrinsic::x86_avx2_psllv_q:
9281 case Intrinsic::x86_avx2_psllv_d_256:
9282 case Intrinsic::x86_avx2_psllv_q_256:
9283 return DAG.getNode(ISD::SHL, dl, Op.getValueType(),
9284 Op.getOperand(1), Op.getOperand(2));
9285 case Intrinsic::x86_avx2_psrlv_d:
9286 case Intrinsic::x86_avx2_psrlv_q:
9287 case Intrinsic::x86_avx2_psrlv_d_256:
9288 case Intrinsic::x86_avx2_psrlv_q_256:
9289 return DAG.getNode(ISD::SRL, dl, Op.getValueType(),
9290 Op.getOperand(1), Op.getOperand(2));
9291 case Intrinsic::x86_avx2_psrav_d:
9292 case Intrinsic::x86_avx2_psrav_d_256:
9293 return DAG.getNode(ISD::SRA, dl, Op.getValueType(),
9294 Op.getOperand(1), Op.getOperand(2));
9296 // ptest and testp intrinsics. The intrinsic these come from are designed to
9297 // return an integer value, not just an instruction so lower it to the ptest
9298 // or testp pattern and a setcc for the result.
9299 case Intrinsic::x86_sse41_ptestz:
9300 case Intrinsic::x86_sse41_ptestc:
9301 case Intrinsic::x86_sse41_ptestnzc:
9302 case Intrinsic::x86_avx_ptestz_256:
9303 case Intrinsic::x86_avx_ptestc_256:
9304 case Intrinsic::x86_avx_ptestnzc_256:
9305 case Intrinsic::x86_avx_vtestz_ps:
9306 case Intrinsic::x86_avx_vtestc_ps:
9307 case Intrinsic::x86_avx_vtestnzc_ps:
9308 case Intrinsic::x86_avx_vtestz_pd:
9309 case Intrinsic::x86_avx_vtestc_pd:
9310 case Intrinsic::x86_avx_vtestnzc_pd:
9311 case Intrinsic::x86_avx_vtestz_ps_256:
9312 case Intrinsic::x86_avx_vtestc_ps_256:
9313 case Intrinsic::x86_avx_vtestnzc_ps_256:
9314 case Intrinsic::x86_avx_vtestz_pd_256:
9315 case Intrinsic::x86_avx_vtestc_pd_256:
9316 case Intrinsic::x86_avx_vtestnzc_pd_256: {
9317 bool IsTestPacked = false;
9320 default: llvm_unreachable("Bad fallthrough in Intrinsic lowering.");
9321 case Intrinsic::x86_avx_vtestz_ps:
9322 case Intrinsic::x86_avx_vtestz_pd:
9323 case Intrinsic::x86_avx_vtestz_ps_256:
9324 case Intrinsic::x86_avx_vtestz_pd_256:
9325 IsTestPacked = true; // Fallthrough
9326 case Intrinsic::x86_sse41_ptestz:
9327 case Intrinsic::x86_avx_ptestz_256:
9329 X86CC = X86::COND_E;
9331 case Intrinsic::x86_avx_vtestc_ps:
9332 case Intrinsic::x86_avx_vtestc_pd:
9333 case Intrinsic::x86_avx_vtestc_ps_256:
9334 case Intrinsic::x86_avx_vtestc_pd_256:
9335 IsTestPacked = true; // Fallthrough
9336 case Intrinsic::x86_sse41_ptestc:
9337 case Intrinsic::x86_avx_ptestc_256:
9339 X86CC = X86::COND_B;
9341 case Intrinsic::x86_avx_vtestnzc_ps:
9342 case Intrinsic::x86_avx_vtestnzc_pd:
9343 case Intrinsic::x86_avx_vtestnzc_ps_256:
9344 case Intrinsic::x86_avx_vtestnzc_pd_256:
9345 IsTestPacked = true; // Fallthrough
9346 case Intrinsic::x86_sse41_ptestnzc:
9347 case Intrinsic::x86_avx_ptestnzc_256:
9349 X86CC = X86::COND_A;
9353 SDValue LHS = Op.getOperand(1);
9354 SDValue RHS = Op.getOperand(2);
9355 unsigned TestOpc = IsTestPacked ? X86ISD::TESTP : X86ISD::PTEST;
9356 SDValue Test = DAG.getNode(TestOpc, dl, MVT::i32, LHS, RHS);
9357 SDValue CC = DAG.getConstant(X86CC, MVT::i8);
9358 SDValue SetCC = DAG.getNode(X86ISD::SETCC, dl, MVT::i8, CC, Test);
9359 return DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, SetCC);
9362 // Fix vector shift instructions where the last operand is a non-immediate
9364 case Intrinsic::x86_avx2_pslli_w:
9365 case Intrinsic::x86_avx2_pslli_d:
9366 case Intrinsic::x86_avx2_pslli_q:
9367 case Intrinsic::x86_avx2_psrli_w:
9368 case Intrinsic::x86_avx2_psrli_d:
9369 case Intrinsic::x86_avx2_psrli_q:
9370 case Intrinsic::x86_avx2_psrai_w:
9371 case Intrinsic::x86_avx2_psrai_d:
9372 case Intrinsic::x86_sse2_pslli_w:
9373 case Intrinsic::x86_sse2_pslli_d:
9374 case Intrinsic::x86_sse2_pslli_q:
9375 case Intrinsic::x86_sse2_psrli_w:
9376 case Intrinsic::x86_sse2_psrli_d:
9377 case Intrinsic::x86_sse2_psrli_q:
9378 case Intrinsic::x86_sse2_psrai_w:
9379 case Intrinsic::x86_sse2_psrai_d:
9380 case Intrinsic::x86_mmx_pslli_w:
9381 case Intrinsic::x86_mmx_pslli_d:
9382 case Intrinsic::x86_mmx_pslli_q:
9383 case Intrinsic::x86_mmx_psrli_w:
9384 case Intrinsic::x86_mmx_psrli_d:
9385 case Intrinsic::x86_mmx_psrli_q:
9386 case Intrinsic::x86_mmx_psrai_w:
9387 case Intrinsic::x86_mmx_psrai_d: {
9388 SDValue ShAmt = Op.getOperand(2);
9389 if (isa<ConstantSDNode>(ShAmt))
9392 unsigned NewIntNo = 0;
9393 EVT ShAmtVT = MVT::v4i32;
9395 case Intrinsic::x86_sse2_pslli_w:
9396 NewIntNo = Intrinsic::x86_sse2_psll_w;
9398 case Intrinsic::x86_sse2_pslli_d:
9399 NewIntNo = Intrinsic::x86_sse2_psll_d;
9401 case Intrinsic::x86_sse2_pslli_q:
9402 NewIntNo = Intrinsic::x86_sse2_psll_q;
9404 case Intrinsic::x86_sse2_psrli_w:
9405 NewIntNo = Intrinsic::x86_sse2_psrl_w;
9407 case Intrinsic::x86_sse2_psrli_d:
9408 NewIntNo = Intrinsic::x86_sse2_psrl_d;
9410 case Intrinsic::x86_sse2_psrli_q:
9411 NewIntNo = Intrinsic::x86_sse2_psrl_q;
9413 case Intrinsic::x86_sse2_psrai_w:
9414 NewIntNo = Intrinsic::x86_sse2_psra_w;
9416 case Intrinsic::x86_sse2_psrai_d:
9417 NewIntNo = Intrinsic::x86_sse2_psra_d;
9419 case Intrinsic::x86_avx2_pslli_w:
9420 NewIntNo = Intrinsic::x86_avx2_psll_w;
9422 case Intrinsic::x86_avx2_pslli_d:
9423 NewIntNo = Intrinsic::x86_avx2_psll_d;
9425 case Intrinsic::x86_avx2_pslli_q:
9426 NewIntNo = Intrinsic::x86_avx2_psll_q;
9428 case Intrinsic::x86_avx2_psrli_w:
9429 NewIntNo = Intrinsic::x86_avx2_psrl_w;
9431 case Intrinsic::x86_avx2_psrli_d:
9432 NewIntNo = Intrinsic::x86_avx2_psrl_d;
9434 case Intrinsic::x86_avx2_psrli_q:
9435 NewIntNo = Intrinsic::x86_avx2_psrl_q;
9437 case Intrinsic::x86_avx2_psrai_w:
9438 NewIntNo = Intrinsic::x86_avx2_psra_w;
9440 case Intrinsic::x86_avx2_psrai_d:
9441 NewIntNo = Intrinsic::x86_avx2_psra_d;
9444 ShAmtVT = MVT::v2i32;
9446 case Intrinsic::x86_mmx_pslli_w:
9447 NewIntNo = Intrinsic::x86_mmx_psll_w;
9449 case Intrinsic::x86_mmx_pslli_d:
9450 NewIntNo = Intrinsic::x86_mmx_psll_d;
9452 case Intrinsic::x86_mmx_pslli_q:
9453 NewIntNo = Intrinsic::x86_mmx_psll_q;
9455 case Intrinsic::x86_mmx_psrli_w:
9456 NewIntNo = Intrinsic::x86_mmx_psrl_w;
9458 case Intrinsic::x86_mmx_psrli_d:
9459 NewIntNo = Intrinsic::x86_mmx_psrl_d;
9461 case Intrinsic::x86_mmx_psrli_q:
9462 NewIntNo = Intrinsic::x86_mmx_psrl_q;
9464 case Intrinsic::x86_mmx_psrai_w:
9465 NewIntNo = Intrinsic::x86_mmx_psra_w;
9467 case Intrinsic::x86_mmx_psrai_d:
9468 NewIntNo = Intrinsic::x86_mmx_psra_d;
9470 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
9476 // The vector shift intrinsics with scalars uses 32b shift amounts but
9477 // the sse2/mmx shift instructions reads 64 bits. Set the upper 32 bits
9481 ShOps[1] = DAG.getConstant(0, MVT::i32);
9482 if (ShAmtVT == MVT::v4i32) {
9483 ShOps[2] = DAG.getUNDEF(MVT::i32);
9484 ShOps[3] = DAG.getUNDEF(MVT::i32);
9485 ShAmt = DAG.getNode(ISD::BUILD_VECTOR, dl, ShAmtVT, &ShOps[0], 4);
9487 ShAmt = DAG.getNode(ISD::BUILD_VECTOR, dl, ShAmtVT, &ShOps[0], 2);
9488 // FIXME this must be lowered to get rid of the invalid type.
9491 EVT VT = Op.getValueType();
9492 ShAmt = DAG.getNode(ISD::BITCAST, dl, VT, ShAmt);
9493 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
9494 DAG.getConstant(NewIntNo, MVT::i32),
9495 Op.getOperand(1), ShAmt);
9500 SDValue X86TargetLowering::LowerRETURNADDR(SDValue Op,
9501 SelectionDAG &DAG) const {
9502 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
9503 MFI->setReturnAddressIsTaken(true);
9505 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
9506 DebugLoc dl = Op.getDebugLoc();
9509 SDValue FrameAddr = LowerFRAMEADDR(Op, DAG);
9511 DAG.getConstant(TD->getPointerSize(),
9512 Subtarget->is64Bit() ? MVT::i64 : MVT::i32);
9513 return DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
9514 DAG.getNode(ISD::ADD, dl, getPointerTy(),
9516 MachinePointerInfo(), false, false, false, 0);
9519 // Just load the return address.
9520 SDValue RetAddrFI = getReturnAddressFrameIndex(DAG);
9521 return DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
9522 RetAddrFI, MachinePointerInfo(), false, false, false, 0);
9525 SDValue X86TargetLowering::LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const {
9526 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
9527 MFI->setFrameAddressIsTaken(true);
9529 EVT VT = Op.getValueType();
9530 DebugLoc dl = Op.getDebugLoc(); // FIXME probably not meaningful
9531 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
9532 unsigned FrameReg = Subtarget->is64Bit() ? X86::RBP : X86::EBP;
9533 SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, FrameReg, VT);
9535 FrameAddr = DAG.getLoad(VT, dl, DAG.getEntryNode(), FrameAddr,
9536 MachinePointerInfo(),
9537 false, false, false, 0);
9541 SDValue X86TargetLowering::LowerFRAME_TO_ARGS_OFFSET(SDValue Op,
9542 SelectionDAG &DAG) const {
9543 return DAG.getIntPtrConstant(2*TD->getPointerSize());
9546 SDValue X86TargetLowering::LowerEH_RETURN(SDValue Op, SelectionDAG &DAG) const {
9547 MachineFunction &MF = DAG.getMachineFunction();
9548 SDValue Chain = Op.getOperand(0);
9549 SDValue Offset = Op.getOperand(1);
9550 SDValue Handler = Op.getOperand(2);
9551 DebugLoc dl = Op.getDebugLoc();
9553 SDValue Frame = DAG.getCopyFromReg(DAG.getEntryNode(), dl,
9554 Subtarget->is64Bit() ? X86::RBP : X86::EBP,
9556 unsigned StoreAddrReg = (Subtarget->is64Bit() ? X86::RCX : X86::ECX);
9558 SDValue StoreAddr = DAG.getNode(ISD::ADD, dl, getPointerTy(), Frame,
9559 DAG.getIntPtrConstant(TD->getPointerSize()));
9560 StoreAddr = DAG.getNode(ISD::ADD, dl, getPointerTy(), StoreAddr, Offset);
9561 Chain = DAG.getStore(Chain, dl, Handler, StoreAddr, MachinePointerInfo(),
9563 Chain = DAG.getCopyToReg(Chain, dl, StoreAddrReg, StoreAddr);
9564 MF.getRegInfo().addLiveOut(StoreAddrReg);
9566 return DAG.getNode(X86ISD::EH_RETURN, dl,
9568 Chain, DAG.getRegister(StoreAddrReg, getPointerTy()));
9571 SDValue X86TargetLowering::LowerADJUST_TRAMPOLINE(SDValue Op,
9572 SelectionDAG &DAG) const {
9573 return Op.getOperand(0);
9576 SDValue X86TargetLowering::LowerINIT_TRAMPOLINE(SDValue Op,
9577 SelectionDAG &DAG) const {
9578 SDValue Root = Op.getOperand(0);
9579 SDValue Trmp = Op.getOperand(1); // trampoline
9580 SDValue FPtr = Op.getOperand(2); // nested function
9581 SDValue Nest = Op.getOperand(3); // 'nest' parameter value
9582 DebugLoc dl = Op.getDebugLoc();
9584 const Value *TrmpAddr = cast<SrcValueSDNode>(Op.getOperand(4))->getValue();
9586 if (Subtarget->is64Bit()) {
9587 SDValue OutChains[6];
9589 // Large code-model.
9590 const unsigned char JMP64r = 0xFF; // 64-bit jmp through register opcode.
9591 const unsigned char MOV64ri = 0xB8; // X86::MOV64ri opcode.
9593 const unsigned char N86R10 = X86_MC::getX86RegNum(X86::R10);
9594 const unsigned char N86R11 = X86_MC::getX86RegNum(X86::R11);
9596 const unsigned char REX_WB = 0x40 | 0x08 | 0x01; // REX prefix
9598 // Load the pointer to the nested function into R11.
9599 unsigned OpCode = ((MOV64ri | N86R11) << 8) | REX_WB; // movabsq r11
9600 SDValue Addr = Trmp;
9601 OutChains[0] = DAG.getStore(Root, dl, DAG.getConstant(OpCode, MVT::i16),
9602 Addr, MachinePointerInfo(TrmpAddr),
9605 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
9606 DAG.getConstant(2, MVT::i64));
9607 OutChains[1] = DAG.getStore(Root, dl, FPtr, Addr,
9608 MachinePointerInfo(TrmpAddr, 2),
9611 // Load the 'nest' parameter value into R10.
9612 // R10 is specified in X86CallingConv.td
9613 OpCode = ((MOV64ri | N86R10) << 8) | REX_WB; // movabsq r10
9614 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
9615 DAG.getConstant(10, MVT::i64));
9616 OutChains[2] = DAG.getStore(Root, dl, DAG.getConstant(OpCode, MVT::i16),
9617 Addr, MachinePointerInfo(TrmpAddr, 10),
9620 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
9621 DAG.getConstant(12, MVT::i64));
9622 OutChains[3] = DAG.getStore(Root, dl, Nest, Addr,
9623 MachinePointerInfo(TrmpAddr, 12),
9626 // Jump to the nested function.
9627 OpCode = (JMP64r << 8) | REX_WB; // jmpq *...
9628 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
9629 DAG.getConstant(20, MVT::i64));
9630 OutChains[4] = DAG.getStore(Root, dl, DAG.getConstant(OpCode, MVT::i16),
9631 Addr, MachinePointerInfo(TrmpAddr, 20),
9634 unsigned char ModRM = N86R11 | (4 << 3) | (3 << 6); // ...r11
9635 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
9636 DAG.getConstant(22, MVT::i64));
9637 OutChains[5] = DAG.getStore(Root, dl, DAG.getConstant(ModRM, MVT::i8), Addr,
9638 MachinePointerInfo(TrmpAddr, 22),
9641 return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, OutChains, 6);
9643 const Function *Func =
9644 cast<Function>(cast<SrcValueSDNode>(Op.getOperand(5))->getValue());
9645 CallingConv::ID CC = Func->getCallingConv();
9650 llvm_unreachable("Unsupported calling convention");
9651 case CallingConv::C:
9652 case CallingConv::X86_StdCall: {
9653 // Pass 'nest' parameter in ECX.
9654 // Must be kept in sync with X86CallingConv.td
9657 // Check that ECX wasn't needed by an 'inreg' parameter.
9658 FunctionType *FTy = Func->getFunctionType();
9659 const AttrListPtr &Attrs = Func->getAttributes();
9661 if (!Attrs.isEmpty() && !Func->isVarArg()) {
9662 unsigned InRegCount = 0;
9665 for (FunctionType::param_iterator I = FTy->param_begin(),
9666 E = FTy->param_end(); I != E; ++I, ++Idx)
9667 if (Attrs.paramHasAttr(Idx, Attribute::InReg))
9668 // FIXME: should only count parameters that are lowered to integers.
9669 InRegCount += (TD->getTypeSizeInBits(*I) + 31) / 32;
9671 if (InRegCount > 2) {
9672 report_fatal_error("Nest register in use - reduce number of inreg"
9678 case CallingConv::X86_FastCall:
9679 case CallingConv::X86_ThisCall:
9680 case CallingConv::Fast:
9681 // Pass 'nest' parameter in EAX.
9682 // Must be kept in sync with X86CallingConv.td
9687 SDValue OutChains[4];
9690 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
9691 DAG.getConstant(10, MVT::i32));
9692 Disp = DAG.getNode(ISD::SUB, dl, MVT::i32, FPtr, Addr);
9694 // This is storing the opcode for MOV32ri.
9695 const unsigned char MOV32ri = 0xB8; // X86::MOV32ri's opcode byte.
9696 const unsigned char N86Reg = X86_MC::getX86RegNum(NestReg);
9697 OutChains[0] = DAG.getStore(Root, dl,
9698 DAG.getConstant(MOV32ri|N86Reg, MVT::i8),
9699 Trmp, MachinePointerInfo(TrmpAddr),
9702 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
9703 DAG.getConstant(1, MVT::i32));
9704 OutChains[1] = DAG.getStore(Root, dl, Nest, Addr,
9705 MachinePointerInfo(TrmpAddr, 1),
9708 const unsigned char JMP = 0xE9; // jmp <32bit dst> opcode.
9709 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
9710 DAG.getConstant(5, MVT::i32));
9711 OutChains[2] = DAG.getStore(Root, dl, DAG.getConstant(JMP, MVT::i8), Addr,
9712 MachinePointerInfo(TrmpAddr, 5),
9715 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
9716 DAG.getConstant(6, MVT::i32));
9717 OutChains[3] = DAG.getStore(Root, dl, Disp, Addr,
9718 MachinePointerInfo(TrmpAddr, 6),
9721 return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, OutChains, 4);
9725 SDValue X86TargetLowering::LowerFLT_ROUNDS_(SDValue Op,
9726 SelectionDAG &DAG) const {
9728 The rounding mode is in bits 11:10 of FPSR, and has the following
9735 FLT_ROUNDS, on the other hand, expects the following:
9742 To perform the conversion, we do:
9743 (((((FPSR & 0x800) >> 11) | ((FPSR & 0x400) >> 9)) + 1) & 3)
9746 MachineFunction &MF = DAG.getMachineFunction();
9747 const TargetMachine &TM = MF.getTarget();
9748 const TargetFrameLowering &TFI = *TM.getFrameLowering();
9749 unsigned StackAlignment = TFI.getStackAlignment();
9750 EVT VT = Op.getValueType();
9751 DebugLoc DL = Op.getDebugLoc();
9753 // Save FP Control Word to stack slot
9754 int SSFI = MF.getFrameInfo()->CreateStackObject(2, StackAlignment, false);
9755 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
9758 MachineMemOperand *MMO =
9759 MF.getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
9760 MachineMemOperand::MOStore, 2, 2);
9762 SDValue Ops[] = { DAG.getEntryNode(), StackSlot };
9763 SDValue Chain = DAG.getMemIntrinsicNode(X86ISD::FNSTCW16m, DL,
9764 DAG.getVTList(MVT::Other),
9765 Ops, 2, MVT::i16, MMO);
9767 // Load FP Control Word from stack slot
9768 SDValue CWD = DAG.getLoad(MVT::i16, DL, Chain, StackSlot,
9769 MachinePointerInfo(), false, false, false, 0);
9771 // Transform as necessary
9773 DAG.getNode(ISD::SRL, DL, MVT::i16,
9774 DAG.getNode(ISD::AND, DL, MVT::i16,
9775 CWD, DAG.getConstant(0x800, MVT::i16)),
9776 DAG.getConstant(11, MVT::i8));
9778 DAG.getNode(ISD::SRL, DL, MVT::i16,
9779 DAG.getNode(ISD::AND, DL, MVT::i16,
9780 CWD, DAG.getConstant(0x400, MVT::i16)),
9781 DAG.getConstant(9, MVT::i8));
9784 DAG.getNode(ISD::AND, DL, MVT::i16,
9785 DAG.getNode(ISD::ADD, DL, MVT::i16,
9786 DAG.getNode(ISD::OR, DL, MVT::i16, CWD1, CWD2),
9787 DAG.getConstant(1, MVT::i16)),
9788 DAG.getConstant(3, MVT::i16));
9791 return DAG.getNode((VT.getSizeInBits() < 16 ?
9792 ISD::TRUNCATE : ISD::ZERO_EXTEND), DL, VT, RetVal);
9795 SDValue X86TargetLowering::LowerCTLZ(SDValue Op, SelectionDAG &DAG) const {
9796 EVT VT = Op.getValueType();
9798 unsigned NumBits = VT.getSizeInBits();
9799 DebugLoc dl = Op.getDebugLoc();
9801 Op = Op.getOperand(0);
9802 if (VT == MVT::i8) {
9803 // Zero extend to i32 since there is not an i8 bsr.
9805 Op = DAG.getNode(ISD::ZERO_EXTEND, dl, OpVT, Op);
9808 // Issue a bsr (scan bits in reverse) which also sets EFLAGS.
9809 SDVTList VTs = DAG.getVTList(OpVT, MVT::i32);
9810 Op = DAG.getNode(X86ISD::BSR, dl, VTs, Op);
9812 // If src is zero (i.e. bsr sets ZF), returns NumBits.
9815 DAG.getConstant(NumBits+NumBits-1, OpVT),
9816 DAG.getConstant(X86::COND_E, MVT::i8),
9819 Op = DAG.getNode(X86ISD::CMOV, dl, OpVT, Ops, array_lengthof(Ops));
9821 // Finally xor with NumBits-1.
9822 Op = DAG.getNode(ISD::XOR, dl, OpVT, Op, DAG.getConstant(NumBits-1, OpVT));
9825 Op = DAG.getNode(ISD::TRUNCATE, dl, MVT::i8, Op);
9829 SDValue X86TargetLowering::LowerCTLZ_ZERO_UNDEF(SDValue Op,
9830 SelectionDAG &DAG) const {
9831 EVT VT = Op.getValueType();
9833 unsigned NumBits = VT.getSizeInBits();
9834 DebugLoc dl = Op.getDebugLoc();
9836 Op = Op.getOperand(0);
9837 if (VT == MVT::i8) {
9838 // Zero extend to i32 since there is not an i8 bsr.
9840 Op = DAG.getNode(ISD::ZERO_EXTEND, dl, OpVT, Op);
9843 // Issue a bsr (scan bits in reverse).
9844 SDVTList VTs = DAG.getVTList(OpVT, MVT::i32);
9845 Op = DAG.getNode(X86ISD::BSR, dl, VTs, Op);
9847 // And xor with NumBits-1.
9848 Op = DAG.getNode(ISD::XOR, dl, OpVT, Op, DAG.getConstant(NumBits-1, OpVT));
9851 Op = DAG.getNode(ISD::TRUNCATE, dl, MVT::i8, Op);
9855 SDValue X86TargetLowering::LowerCTTZ(SDValue Op, SelectionDAG &DAG) const {
9856 EVT VT = Op.getValueType();
9857 unsigned NumBits = VT.getSizeInBits();
9858 DebugLoc dl = Op.getDebugLoc();
9859 Op = Op.getOperand(0);
9861 // Issue a bsf (scan bits forward) which also sets EFLAGS.
9862 SDVTList VTs = DAG.getVTList(VT, MVT::i32);
9863 Op = DAG.getNode(X86ISD::BSF, dl, VTs, Op);
9865 // If src is zero (i.e. bsf sets ZF), returns NumBits.
9868 DAG.getConstant(NumBits, VT),
9869 DAG.getConstant(X86::COND_E, MVT::i8),
9872 return DAG.getNode(X86ISD::CMOV, dl, VT, Ops, array_lengthof(Ops));
9875 // Lower256IntArith - Break a 256-bit integer operation into two new 128-bit
9876 // ones, and then concatenate the result back.
9877 static SDValue Lower256IntArith(SDValue Op, SelectionDAG &DAG) {
9878 EVT VT = Op.getValueType();
9880 assert(VT.getSizeInBits() == 256 && VT.isInteger() &&
9881 "Unsupported value type for operation");
9883 int NumElems = VT.getVectorNumElements();
9884 DebugLoc dl = Op.getDebugLoc();
9885 SDValue Idx0 = DAG.getConstant(0, MVT::i32);
9886 SDValue Idx1 = DAG.getConstant(NumElems/2, MVT::i32);
9888 // Extract the LHS vectors
9889 SDValue LHS = Op.getOperand(0);
9890 SDValue LHS1 = Extract128BitVector(LHS, Idx0, DAG, dl);
9891 SDValue LHS2 = Extract128BitVector(LHS, Idx1, DAG, dl);
9893 // Extract the RHS vectors
9894 SDValue RHS = Op.getOperand(1);
9895 SDValue RHS1 = Extract128BitVector(RHS, Idx0, DAG, dl);
9896 SDValue RHS2 = Extract128BitVector(RHS, Idx1, DAG, dl);
9898 MVT EltVT = VT.getVectorElementType().getSimpleVT();
9899 EVT NewVT = MVT::getVectorVT(EltVT, NumElems/2);
9901 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT,
9902 DAG.getNode(Op.getOpcode(), dl, NewVT, LHS1, RHS1),
9903 DAG.getNode(Op.getOpcode(), dl, NewVT, LHS2, RHS2));
9906 SDValue X86TargetLowering::LowerADD(SDValue Op, SelectionDAG &DAG) const {
9907 assert(Op.getValueType().getSizeInBits() == 256 &&
9908 Op.getValueType().isInteger() &&
9909 "Only handle AVX 256-bit vector integer operation");
9910 return Lower256IntArith(Op, DAG);
9913 SDValue X86TargetLowering::LowerSUB(SDValue Op, SelectionDAG &DAG) const {
9914 assert(Op.getValueType().getSizeInBits() == 256 &&
9915 Op.getValueType().isInteger() &&
9916 "Only handle AVX 256-bit vector integer operation");
9917 return Lower256IntArith(Op, DAG);
9920 SDValue X86TargetLowering::LowerMUL(SDValue Op, SelectionDAG &DAG) const {
9921 EVT VT = Op.getValueType();
9923 // Decompose 256-bit ops into smaller 128-bit ops.
9924 if (VT.getSizeInBits() == 256 && !Subtarget->hasAVX2())
9925 return Lower256IntArith(Op, DAG);
9927 DebugLoc dl = Op.getDebugLoc();
9929 SDValue A = Op.getOperand(0);
9930 SDValue B = Op.getOperand(1);
9932 if (VT == MVT::v4i64) {
9933 assert(Subtarget->hasAVX2() && "Lowering v4i64 multiply requires AVX2");
9935 // ulong2 Ahi = __builtin_ia32_psrlqi256( a, 32);
9936 // ulong2 Bhi = __builtin_ia32_psrlqi256( b, 32);
9937 // ulong2 AloBlo = __builtin_ia32_pmuludq256( a, b );
9938 // ulong2 AloBhi = __builtin_ia32_pmuludq256( a, Bhi );
9939 // ulong2 AhiBlo = __builtin_ia32_pmuludq256( Ahi, b );
9941 // AloBhi = __builtin_ia32_psllqi256( AloBhi, 32 );
9942 // AhiBlo = __builtin_ia32_psllqi256( AhiBlo, 32 );
9943 // return AloBlo + AloBhi + AhiBlo;
9945 SDValue Ahi = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
9946 DAG.getConstant(Intrinsic::x86_avx2_psrli_q, MVT::i32),
9947 A, DAG.getConstant(32, MVT::i32));
9948 SDValue Bhi = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
9949 DAG.getConstant(Intrinsic::x86_avx2_psrli_q, MVT::i32),
9950 B, DAG.getConstant(32, MVT::i32));
9951 SDValue AloBlo = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
9952 DAG.getConstant(Intrinsic::x86_avx2_pmulu_dq, MVT::i32),
9954 SDValue AloBhi = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
9955 DAG.getConstant(Intrinsic::x86_avx2_pmulu_dq, MVT::i32),
9957 SDValue AhiBlo = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
9958 DAG.getConstant(Intrinsic::x86_avx2_pmulu_dq, MVT::i32),
9960 AloBhi = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
9961 DAG.getConstant(Intrinsic::x86_avx2_pslli_q, MVT::i32),
9962 AloBhi, DAG.getConstant(32, MVT::i32));
9963 AhiBlo = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
9964 DAG.getConstant(Intrinsic::x86_avx2_pslli_q, MVT::i32),
9965 AhiBlo, DAG.getConstant(32, MVT::i32));
9966 SDValue Res = DAG.getNode(ISD::ADD, dl, VT, AloBlo, AloBhi);
9967 Res = DAG.getNode(ISD::ADD, dl, VT, Res, AhiBlo);
9971 assert(VT == MVT::v2i64 && "Only know how to lower V2I64 multiply");
9973 // ulong2 Ahi = __builtin_ia32_psrlqi128( a, 32);
9974 // ulong2 Bhi = __builtin_ia32_psrlqi128( b, 32);
9975 // ulong2 AloBlo = __builtin_ia32_pmuludq128( a, b );
9976 // ulong2 AloBhi = __builtin_ia32_pmuludq128( a, Bhi );
9977 // ulong2 AhiBlo = __builtin_ia32_pmuludq128( Ahi, b );
9979 // AloBhi = __builtin_ia32_psllqi128( AloBhi, 32 );
9980 // AhiBlo = __builtin_ia32_psllqi128( AhiBlo, 32 );
9981 // return AloBlo + AloBhi + AhiBlo;
9983 SDValue Ahi = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
9984 DAG.getConstant(Intrinsic::x86_sse2_psrli_q, MVT::i32),
9985 A, DAG.getConstant(32, MVT::i32));
9986 SDValue Bhi = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
9987 DAG.getConstant(Intrinsic::x86_sse2_psrli_q, MVT::i32),
9988 B, DAG.getConstant(32, MVT::i32));
9989 SDValue AloBlo = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
9990 DAG.getConstant(Intrinsic::x86_sse2_pmulu_dq, MVT::i32),
9992 SDValue AloBhi = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
9993 DAG.getConstant(Intrinsic::x86_sse2_pmulu_dq, MVT::i32),
9995 SDValue AhiBlo = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
9996 DAG.getConstant(Intrinsic::x86_sse2_pmulu_dq, MVT::i32),
9998 AloBhi = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
9999 DAG.getConstant(Intrinsic::x86_sse2_pslli_q, MVT::i32),
10000 AloBhi, DAG.getConstant(32, MVT::i32));
10001 AhiBlo = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
10002 DAG.getConstant(Intrinsic::x86_sse2_pslli_q, MVT::i32),
10003 AhiBlo, DAG.getConstant(32, MVT::i32));
10004 SDValue Res = DAG.getNode(ISD::ADD, dl, VT, AloBlo, AloBhi);
10005 Res = DAG.getNode(ISD::ADD, dl, VT, Res, AhiBlo);
10009 SDValue X86TargetLowering::LowerShift(SDValue Op, SelectionDAG &DAG) const {
10011 EVT VT = Op.getValueType();
10012 DebugLoc dl = Op.getDebugLoc();
10013 SDValue R = Op.getOperand(0);
10014 SDValue Amt = Op.getOperand(1);
10015 LLVMContext *Context = DAG.getContext();
10017 if (!Subtarget->hasSSE2())
10020 // Optimize shl/srl/sra with constant shift amount.
10021 if (isSplatVector(Amt.getNode())) {
10022 SDValue SclrAmt = Amt->getOperand(0);
10023 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(SclrAmt)) {
10024 uint64_t ShiftAmt = C->getZExtValue();
10026 if (VT == MVT::v16i8 && Op.getOpcode() == ISD::SHL) {
10027 // Make a large shift.
10029 DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
10030 DAG.getConstant(Intrinsic::x86_sse2_pslli_w, MVT::i32),
10031 R, DAG.getConstant(ShiftAmt, MVT::i32));
10032 // Zero out the rightmost bits.
10033 SmallVector<SDValue, 16> V(16, DAG.getConstant(uint8_t(-1U << ShiftAmt),
10035 return DAG.getNode(ISD::AND, dl, VT, SHL,
10036 DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &V[0], 16));
10039 if (VT == MVT::v2i64 && Op.getOpcode() == ISD::SHL)
10040 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
10041 DAG.getConstant(Intrinsic::x86_sse2_pslli_q, MVT::i32),
10042 R, DAG.getConstant(ShiftAmt, MVT::i32));
10044 if (VT == MVT::v4i32 && Op.getOpcode() == ISD::SHL)
10045 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
10046 DAG.getConstant(Intrinsic::x86_sse2_pslli_d, MVT::i32),
10047 R, DAG.getConstant(ShiftAmt, MVT::i32));
10049 if (VT == MVT::v8i16 && Op.getOpcode() == ISD::SHL)
10050 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
10051 DAG.getConstant(Intrinsic::x86_sse2_pslli_w, MVT::i32),
10052 R, DAG.getConstant(ShiftAmt, MVT::i32));
10054 if (VT == MVT::v16i8 && Op.getOpcode() == ISD::SRL) {
10055 // Make a large shift.
10057 DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
10058 DAG.getConstant(Intrinsic::x86_sse2_psrli_w, MVT::i32),
10059 R, DAG.getConstant(ShiftAmt, MVT::i32));
10060 // Zero out the leftmost bits.
10061 SmallVector<SDValue, 16> V(16, DAG.getConstant(uint8_t(-1U) >> ShiftAmt,
10063 return DAG.getNode(ISD::AND, dl, VT, SRL,
10064 DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &V[0], 16));
10067 if (VT == MVT::v2i64 && Op.getOpcode() == ISD::SRL)
10068 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
10069 DAG.getConstant(Intrinsic::x86_sse2_psrli_q, MVT::i32),
10070 R, DAG.getConstant(ShiftAmt, MVT::i32));
10072 if (VT == MVT::v4i32 && Op.getOpcode() == ISD::SRL)
10073 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
10074 DAG.getConstant(Intrinsic::x86_sse2_psrli_d, MVT::i32),
10075 R, DAG.getConstant(ShiftAmt, MVT::i32));
10077 if (VT == MVT::v8i16 && Op.getOpcode() == ISD::SRL)
10078 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
10079 DAG.getConstant(Intrinsic::x86_sse2_psrli_w, MVT::i32),
10080 R, DAG.getConstant(ShiftAmt, MVT::i32));
10082 if (VT == MVT::v4i32 && Op.getOpcode() == ISD::SRA)
10083 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
10084 DAG.getConstant(Intrinsic::x86_sse2_psrai_d, MVT::i32),
10085 R, DAG.getConstant(ShiftAmt, MVT::i32));
10087 if (VT == MVT::v8i16 && Op.getOpcode() == ISD::SRA)
10088 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
10089 DAG.getConstant(Intrinsic::x86_sse2_psrai_w, MVT::i32),
10090 R, DAG.getConstant(ShiftAmt, MVT::i32));
10092 if (VT == MVT::v16i8 && Op.getOpcode() == ISD::SRA) {
10093 if (ShiftAmt == 7) {
10094 // R s>> 7 === R s< 0
10095 SDValue Zeros = getZeroVector(VT, /* HasSSE2 */true,
10096 /* HasAVX2 */false, DAG, dl);
10097 return DAG.getNode(X86ISD::PCMPGTB, dl, VT, Zeros, R);
10100 // R s>> a === ((R u>> a) ^ m) - m
10101 SDValue Res = DAG.getNode(ISD::SRL, dl, VT, R, Amt);
10102 SmallVector<SDValue, 16> V(16, DAG.getConstant(128 >> ShiftAmt,
10104 SDValue Mask = DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &V[0], 16);
10105 Res = DAG.getNode(ISD::XOR, dl, VT, Res, Mask);
10106 Res = DAG.getNode(ISD::SUB, dl, VT, Res, Mask);
10110 if (Subtarget->hasAVX2() && VT == MVT::v32i8) {
10111 if (Op.getOpcode() == ISD::SHL) {
10112 // Make a large shift.
10114 DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
10115 DAG.getConstant(Intrinsic::x86_avx2_pslli_w, MVT::i32),
10116 R, DAG.getConstant(ShiftAmt, MVT::i32));
10117 // Zero out the rightmost bits.
10118 SmallVector<SDValue, 32> V(32, DAG.getConstant(uint8_t(-1U << ShiftAmt),
10120 return DAG.getNode(ISD::AND, dl, VT, SHL,
10121 DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &V[0], 32));
10123 if (Op.getOpcode() == ISD::SRL) {
10124 // Make a large shift.
10126 DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
10127 DAG.getConstant(Intrinsic::x86_avx2_psrli_w, MVT::i32),
10128 R, DAG.getConstant(ShiftAmt, MVT::i32));
10129 // Zero out the leftmost bits.
10130 SmallVector<SDValue, 32> V(32, DAG.getConstant(uint8_t(-1U) >> ShiftAmt,
10132 return DAG.getNode(ISD::AND, dl, VT, SRL,
10133 DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &V[0], 32));
10135 if (Op.getOpcode() == ISD::SRA) {
10136 if (ShiftAmt == 7) {
10137 // R s>> 7 === R s< 0
10138 SDValue Zeros = getZeroVector(VT, true /* HasSSE2 */,
10139 true /* HasAVX2 */, DAG, dl);
10140 return DAG.getNode(X86ISD::PCMPGTB, dl, VT, Zeros, R);
10143 // R s>> a === ((R u>> a) ^ m) - m
10144 SDValue Res = DAG.getNode(ISD::SRL, dl, VT, R, Amt);
10145 SmallVector<SDValue, 32> V(32, DAG.getConstant(128 >> ShiftAmt,
10147 SDValue Mask = DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &V[0], 32);
10148 Res = DAG.getNode(ISD::XOR, dl, VT, Res, Mask);
10149 Res = DAG.getNode(ISD::SUB, dl, VT, Res, Mask);
10156 // Lower SHL with variable shift amount.
10157 if (VT == MVT::v4i32 && Op->getOpcode() == ISD::SHL) {
10158 Op = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
10159 DAG.getConstant(Intrinsic::x86_sse2_pslli_d, MVT::i32),
10160 Op.getOperand(1), DAG.getConstant(23, MVT::i32));
10162 ConstantInt *CI = ConstantInt::get(*Context, APInt(32, 0x3f800000U));
10164 std::vector<Constant*> CV(4, CI);
10165 Constant *C = ConstantVector::get(CV);
10166 SDValue CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
10167 SDValue Addend = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
10168 MachinePointerInfo::getConstantPool(),
10169 false, false, false, 16);
10171 Op = DAG.getNode(ISD::ADD, dl, VT, Op, Addend);
10172 Op = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, Op);
10173 Op = DAG.getNode(ISD::FP_TO_SINT, dl, VT, Op);
10174 return DAG.getNode(ISD::MUL, dl, VT, Op, R);
10176 if (VT == MVT::v16i8 && Op->getOpcode() == ISD::SHL) {
10177 assert(Subtarget->hasSSE2() && "Need SSE2 for pslli/pcmpeq.");
10180 Op = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
10181 DAG.getConstant(Intrinsic::x86_sse2_pslli_w, MVT::i32),
10182 Op.getOperand(1), DAG.getConstant(5, MVT::i32));
10184 // Turn 'a' into a mask suitable for VSELECT
10185 SDValue VSelM = DAG.getConstant(0x80, VT);
10186 SDValue OpVSel = DAG.getNode(ISD::AND, dl, VT, VSelM, Op);
10187 OpVSel = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
10188 DAG.getConstant(Intrinsic::x86_sse2_pcmpeq_b, MVT::i32),
10191 SDValue CM1 = DAG.getConstant(0x0f, VT);
10192 SDValue CM2 = DAG.getConstant(0x3f, VT);
10194 // r = VSELECT(r, psllw(r & (char16)15, 4), a);
10195 SDValue M = DAG.getNode(ISD::AND, dl, VT, R, CM1);
10196 M = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
10197 DAG.getConstant(Intrinsic::x86_sse2_pslli_w, MVT::i32), M,
10198 DAG.getConstant(4, MVT::i32));
10199 R = DAG.getNode(ISD::VSELECT, dl, VT, OpVSel, M, R);
10202 Op = DAG.getNode(ISD::ADD, dl, VT, Op, Op);
10203 OpVSel = DAG.getNode(ISD::AND, dl, VT, VSelM, Op);
10204 OpVSel = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
10205 DAG.getConstant(Intrinsic::x86_sse2_pcmpeq_b, MVT::i32),
10208 // r = VSELECT(r, psllw(r & (char16)63, 2), a);
10209 M = DAG.getNode(ISD::AND, dl, VT, R, CM2);
10210 M = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
10211 DAG.getConstant(Intrinsic::x86_sse2_pslli_w, MVT::i32), M,
10212 DAG.getConstant(2, MVT::i32));
10213 R = DAG.getNode(ISD::VSELECT, dl, VT, OpVSel, M, R);
10216 Op = DAG.getNode(ISD::ADD, dl, VT, Op, Op);
10217 OpVSel = DAG.getNode(ISD::AND, dl, VT, VSelM, Op);
10218 OpVSel = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
10219 DAG.getConstant(Intrinsic::x86_sse2_pcmpeq_b, MVT::i32),
10222 // return VSELECT(r, r+r, a);
10223 R = DAG.getNode(ISD::VSELECT, dl, VT, OpVSel,
10224 DAG.getNode(ISD::ADD, dl, VT, R, R), R);
10228 // Decompose 256-bit shifts into smaller 128-bit shifts.
10229 if (VT.getSizeInBits() == 256) {
10230 int NumElems = VT.getVectorNumElements();
10231 MVT EltVT = VT.getVectorElementType().getSimpleVT();
10232 EVT NewVT = MVT::getVectorVT(EltVT, NumElems/2);
10234 // Extract the two vectors
10235 SDValue V1 = Extract128BitVector(R, DAG.getConstant(0, MVT::i32), DAG, dl);
10236 SDValue V2 = Extract128BitVector(R, DAG.getConstant(NumElems/2, MVT::i32),
10239 // Recreate the shift amount vectors
10240 SDValue Amt1, Amt2;
10241 if (Amt.getOpcode() == ISD::BUILD_VECTOR) {
10242 // Constant shift amount
10243 SmallVector<SDValue, 4> Amt1Csts;
10244 SmallVector<SDValue, 4> Amt2Csts;
10245 for (int i = 0; i < NumElems/2; ++i)
10246 Amt1Csts.push_back(Amt->getOperand(i));
10247 for (int i = NumElems/2; i < NumElems; ++i)
10248 Amt2Csts.push_back(Amt->getOperand(i));
10250 Amt1 = DAG.getNode(ISD::BUILD_VECTOR, dl, NewVT,
10251 &Amt1Csts[0], NumElems/2);
10252 Amt2 = DAG.getNode(ISD::BUILD_VECTOR, dl, NewVT,
10253 &Amt2Csts[0], NumElems/2);
10255 // Variable shift amount
10256 Amt1 = Extract128BitVector(Amt, DAG.getConstant(0, MVT::i32), DAG, dl);
10257 Amt2 = Extract128BitVector(Amt, DAG.getConstant(NumElems/2, MVT::i32),
10261 // Issue new vector shifts for the smaller types
10262 V1 = DAG.getNode(Op.getOpcode(), dl, NewVT, V1, Amt1);
10263 V2 = DAG.getNode(Op.getOpcode(), dl, NewVT, V2, Amt2);
10265 // Concatenate the result back
10266 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, V1, V2);
10272 SDValue X86TargetLowering::LowerXALUO(SDValue Op, SelectionDAG &DAG) const {
10273 // Lower the "add/sub/mul with overflow" instruction into a regular ins plus
10274 // a "setcc" instruction that checks the overflow flag. The "brcond" lowering
10275 // looks for this combo and may remove the "setcc" instruction if the "setcc"
10276 // has only one use.
10277 SDNode *N = Op.getNode();
10278 SDValue LHS = N->getOperand(0);
10279 SDValue RHS = N->getOperand(1);
10280 unsigned BaseOp = 0;
10282 DebugLoc DL = Op.getDebugLoc();
10283 switch (Op.getOpcode()) {
10284 default: llvm_unreachable("Unknown ovf instruction!");
10286 // A subtract of one will be selected as a INC. Note that INC doesn't
10287 // set CF, so we can't do this for UADDO.
10288 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(RHS))
10290 BaseOp = X86ISD::INC;
10291 Cond = X86::COND_O;
10294 BaseOp = X86ISD::ADD;
10295 Cond = X86::COND_O;
10298 BaseOp = X86ISD::ADD;
10299 Cond = X86::COND_B;
10302 // A subtract of one will be selected as a DEC. Note that DEC doesn't
10303 // set CF, so we can't do this for USUBO.
10304 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(RHS))
10306 BaseOp = X86ISD::DEC;
10307 Cond = X86::COND_O;
10310 BaseOp = X86ISD::SUB;
10311 Cond = X86::COND_O;
10314 BaseOp = X86ISD::SUB;
10315 Cond = X86::COND_B;
10318 BaseOp = X86ISD::SMUL;
10319 Cond = X86::COND_O;
10321 case ISD::UMULO: { // i64, i8 = umulo lhs, rhs --> i64, i64, i32 umul lhs,rhs
10322 SDVTList VTs = DAG.getVTList(N->getValueType(0), N->getValueType(0),
10324 SDValue Sum = DAG.getNode(X86ISD::UMUL, DL, VTs, LHS, RHS);
10327 DAG.getNode(X86ISD::SETCC, DL, MVT::i8,
10328 DAG.getConstant(X86::COND_O, MVT::i32),
10329 SDValue(Sum.getNode(), 2));
10331 return DAG.getNode(ISD::MERGE_VALUES, DL, N->getVTList(), Sum, SetCC);
10335 // Also sets EFLAGS.
10336 SDVTList VTs = DAG.getVTList(N->getValueType(0), MVT::i32);
10337 SDValue Sum = DAG.getNode(BaseOp, DL, VTs, LHS, RHS);
10340 DAG.getNode(X86ISD::SETCC, DL, N->getValueType(1),
10341 DAG.getConstant(Cond, MVT::i32),
10342 SDValue(Sum.getNode(), 1));
10344 return DAG.getNode(ISD::MERGE_VALUES, DL, N->getVTList(), Sum, SetCC);
10347 SDValue X86TargetLowering::LowerSIGN_EXTEND_INREG(SDValue Op,
10348 SelectionDAG &DAG) const {
10349 DebugLoc dl = Op.getDebugLoc();
10350 EVT ExtraVT = cast<VTSDNode>(Op.getOperand(1))->getVT();
10351 EVT VT = Op.getValueType();
10353 if (Subtarget->hasSSE2() && VT.isVector()) {
10354 unsigned BitsDiff = VT.getScalarType().getSizeInBits() -
10355 ExtraVT.getScalarType().getSizeInBits();
10356 SDValue ShAmt = DAG.getConstant(BitsDiff, MVT::i32);
10358 unsigned SHLIntrinsicsID = 0;
10359 unsigned SRAIntrinsicsID = 0;
10360 switch (VT.getSimpleVT().SimpleTy) {
10364 SHLIntrinsicsID = Intrinsic::x86_sse2_pslli_d;
10365 SRAIntrinsicsID = Intrinsic::x86_sse2_psrai_d;
10368 SHLIntrinsicsID = Intrinsic::x86_sse2_pslli_w;
10369 SRAIntrinsicsID = Intrinsic::x86_sse2_psrai_w;
10373 if (!Subtarget->hasAVX())
10375 if (!Subtarget->hasAVX2()) {
10376 // needs to be split
10377 int NumElems = VT.getVectorNumElements();
10378 SDValue Idx0 = DAG.getConstant(0, MVT::i32);
10379 SDValue Idx1 = DAG.getConstant(NumElems/2, MVT::i32);
10381 // Extract the LHS vectors
10382 SDValue LHS = Op.getOperand(0);
10383 SDValue LHS1 = Extract128BitVector(LHS, Idx0, DAG, dl);
10384 SDValue LHS2 = Extract128BitVector(LHS, Idx1, DAG, dl);
10386 MVT EltVT = VT.getVectorElementType().getSimpleVT();
10387 EVT NewVT = MVT::getVectorVT(EltVT, NumElems/2);
10389 EVT ExtraEltVT = ExtraVT.getVectorElementType();
10390 int ExtraNumElems = ExtraVT.getVectorNumElements();
10391 ExtraVT = EVT::getVectorVT(*DAG.getContext(), ExtraEltVT,
10393 SDValue Extra = DAG.getValueType(ExtraVT);
10395 LHS1 = DAG.getNode(Op.getOpcode(), dl, NewVT, LHS1, Extra);
10396 LHS2 = DAG.getNode(Op.getOpcode(), dl, NewVT, LHS2, Extra);
10398 return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, LHS1, LHS2);;
10400 if (VT == MVT::v8i32) {
10401 SHLIntrinsicsID = Intrinsic::x86_avx2_pslli_d;
10402 SRAIntrinsicsID = Intrinsic::x86_avx2_psrai_d;
10404 SHLIntrinsicsID = Intrinsic::x86_avx2_pslli_w;
10405 SRAIntrinsicsID = Intrinsic::x86_avx2_psrai_w;
10409 SDValue Tmp1 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
10410 DAG.getConstant(SHLIntrinsicsID, MVT::i32),
10411 Op.getOperand(0), ShAmt);
10413 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
10414 DAG.getConstant(SRAIntrinsicsID, MVT::i32),
10422 SDValue X86TargetLowering::LowerMEMBARRIER(SDValue Op, SelectionDAG &DAG) const{
10423 DebugLoc dl = Op.getDebugLoc();
10425 // Go ahead and emit the fence on x86-64 even if we asked for no-sse2.
10426 // There isn't any reason to disable it if the target processor supports it.
10427 if (!Subtarget->hasSSE2() && !Subtarget->is64Bit()) {
10428 SDValue Chain = Op.getOperand(0);
10429 SDValue Zero = DAG.getConstant(0, MVT::i32);
10431 DAG.getRegister(X86::ESP, MVT::i32), // Base
10432 DAG.getTargetConstant(1, MVT::i8), // Scale
10433 DAG.getRegister(0, MVT::i32), // Index
10434 DAG.getTargetConstant(0, MVT::i32), // Disp
10435 DAG.getRegister(0, MVT::i32), // Segment.
10440 DAG.getMachineNode(X86::OR32mrLocked, dl, MVT::Other, Ops,
10441 array_lengthof(Ops));
10442 return SDValue(Res, 0);
10445 unsigned isDev = cast<ConstantSDNode>(Op.getOperand(5))->getZExtValue();
10447 return DAG.getNode(X86ISD::MEMBARRIER, dl, MVT::Other, Op.getOperand(0));
10449 unsigned Op1 = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
10450 unsigned Op2 = cast<ConstantSDNode>(Op.getOperand(2))->getZExtValue();
10451 unsigned Op3 = cast<ConstantSDNode>(Op.getOperand(3))->getZExtValue();
10452 unsigned Op4 = cast<ConstantSDNode>(Op.getOperand(4))->getZExtValue();
10454 // def : Pat<(membarrier (i8 0), (i8 0), (i8 0), (i8 1), (i8 1)), (SFENCE)>;
10455 if (!Op1 && !Op2 && !Op3 && Op4)
10456 return DAG.getNode(X86ISD::SFENCE, dl, MVT::Other, Op.getOperand(0));
10458 // def : Pat<(membarrier (i8 1), (i8 0), (i8 0), (i8 0), (i8 1)), (LFENCE)>;
10459 if (Op1 && !Op2 && !Op3 && !Op4)
10460 return DAG.getNode(X86ISD::LFENCE, dl, MVT::Other, Op.getOperand(0));
10462 // def : Pat<(membarrier (i8 imm), (i8 imm), (i8 imm), (i8 imm), (i8 1)),
10464 return DAG.getNode(X86ISD::MFENCE, dl, MVT::Other, Op.getOperand(0));
10467 SDValue X86TargetLowering::LowerATOMIC_FENCE(SDValue Op,
10468 SelectionDAG &DAG) const {
10469 DebugLoc dl = Op.getDebugLoc();
10470 AtomicOrdering FenceOrdering = static_cast<AtomicOrdering>(
10471 cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue());
10472 SynchronizationScope FenceScope = static_cast<SynchronizationScope>(
10473 cast<ConstantSDNode>(Op.getOperand(2))->getZExtValue());
10475 // The only fence that needs an instruction is a sequentially-consistent
10476 // cross-thread fence.
10477 if (FenceOrdering == SequentiallyConsistent && FenceScope == CrossThread) {
10478 // Use mfence if we have SSE2 or we're on x86-64 (even if we asked for
10479 // no-sse2). There isn't any reason to disable it if the target processor
10481 if (Subtarget->hasSSE2() || Subtarget->is64Bit())
10482 return DAG.getNode(X86ISD::MFENCE, dl, MVT::Other, Op.getOperand(0));
10484 SDValue Chain = Op.getOperand(0);
10485 SDValue Zero = DAG.getConstant(0, MVT::i32);
10487 DAG.getRegister(X86::ESP, MVT::i32), // Base
10488 DAG.getTargetConstant(1, MVT::i8), // Scale
10489 DAG.getRegister(0, MVT::i32), // Index
10490 DAG.getTargetConstant(0, MVT::i32), // Disp
10491 DAG.getRegister(0, MVT::i32), // Segment.
10496 DAG.getMachineNode(X86::OR32mrLocked, dl, MVT::Other, Ops,
10497 array_lengthof(Ops));
10498 return SDValue(Res, 0);
10501 // MEMBARRIER is a compiler barrier; it codegens to a no-op.
10502 return DAG.getNode(X86ISD::MEMBARRIER, dl, MVT::Other, Op.getOperand(0));
10506 SDValue X86TargetLowering::LowerCMP_SWAP(SDValue Op, SelectionDAG &DAG) const {
10507 EVT T = Op.getValueType();
10508 DebugLoc DL = Op.getDebugLoc();
10511 switch(T.getSimpleVT().SimpleTy) {
10513 assert(false && "Invalid value type!");
10514 case MVT::i8: Reg = X86::AL; size = 1; break;
10515 case MVT::i16: Reg = X86::AX; size = 2; break;
10516 case MVT::i32: Reg = X86::EAX; size = 4; break;
10518 assert(Subtarget->is64Bit() && "Node not type legal!");
10519 Reg = X86::RAX; size = 8;
10522 SDValue cpIn = DAG.getCopyToReg(Op.getOperand(0), DL, Reg,
10523 Op.getOperand(2), SDValue());
10524 SDValue Ops[] = { cpIn.getValue(0),
10527 DAG.getTargetConstant(size, MVT::i8),
10528 cpIn.getValue(1) };
10529 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Glue);
10530 MachineMemOperand *MMO = cast<AtomicSDNode>(Op)->getMemOperand();
10531 SDValue Result = DAG.getMemIntrinsicNode(X86ISD::LCMPXCHG_DAG, DL, Tys,
10534 DAG.getCopyFromReg(Result.getValue(0), DL, Reg, T, Result.getValue(1));
10538 SDValue X86TargetLowering::LowerREADCYCLECOUNTER(SDValue Op,
10539 SelectionDAG &DAG) const {
10540 assert(Subtarget->is64Bit() && "Result not type legalized?");
10541 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Glue);
10542 SDValue TheChain = Op.getOperand(0);
10543 DebugLoc dl = Op.getDebugLoc();
10544 SDValue rd = DAG.getNode(X86ISD::RDTSC_DAG, dl, Tys, &TheChain, 1);
10545 SDValue rax = DAG.getCopyFromReg(rd, dl, X86::RAX, MVT::i64, rd.getValue(1));
10546 SDValue rdx = DAG.getCopyFromReg(rax.getValue(1), dl, X86::RDX, MVT::i64,
10548 SDValue Tmp = DAG.getNode(ISD::SHL, dl, MVT::i64, rdx,
10549 DAG.getConstant(32, MVT::i8));
10551 DAG.getNode(ISD::OR, dl, MVT::i64, rax, Tmp),
10554 return DAG.getMergeValues(Ops, 2, dl);
10557 SDValue X86TargetLowering::LowerBITCAST(SDValue Op,
10558 SelectionDAG &DAG) const {
10559 EVT SrcVT = Op.getOperand(0).getValueType();
10560 EVT DstVT = Op.getValueType();
10561 assert(Subtarget->is64Bit() && !Subtarget->hasSSE2() &&
10562 Subtarget->hasMMX() && "Unexpected custom BITCAST");
10563 assert((DstVT == MVT::i64 ||
10564 (DstVT.isVector() && DstVT.getSizeInBits()==64)) &&
10565 "Unexpected custom BITCAST");
10566 // i64 <=> MMX conversions are Legal.
10567 if (SrcVT==MVT::i64 && DstVT.isVector())
10569 if (DstVT==MVT::i64 && SrcVT.isVector())
10571 // MMX <=> MMX conversions are Legal.
10572 if (SrcVT.isVector() && DstVT.isVector())
10574 // All other conversions need to be expanded.
10578 SDValue X86TargetLowering::LowerLOAD_SUB(SDValue Op, SelectionDAG &DAG) const {
10579 SDNode *Node = Op.getNode();
10580 DebugLoc dl = Node->getDebugLoc();
10581 EVT T = Node->getValueType(0);
10582 SDValue negOp = DAG.getNode(ISD::SUB, dl, T,
10583 DAG.getConstant(0, T), Node->getOperand(2));
10584 return DAG.getAtomic(ISD::ATOMIC_LOAD_ADD, dl,
10585 cast<AtomicSDNode>(Node)->getMemoryVT(),
10586 Node->getOperand(0),
10587 Node->getOperand(1), negOp,
10588 cast<AtomicSDNode>(Node)->getSrcValue(),
10589 cast<AtomicSDNode>(Node)->getAlignment(),
10590 cast<AtomicSDNode>(Node)->getOrdering(),
10591 cast<AtomicSDNode>(Node)->getSynchScope());
10594 static SDValue LowerATOMIC_STORE(SDValue Op, SelectionDAG &DAG) {
10595 SDNode *Node = Op.getNode();
10596 DebugLoc dl = Node->getDebugLoc();
10597 EVT VT = cast<AtomicSDNode>(Node)->getMemoryVT();
10599 // Convert seq_cst store -> xchg
10600 // Convert wide store -> swap (-> cmpxchg8b/cmpxchg16b)
10601 // FIXME: On 32-bit, store -> fist or movq would be more efficient
10602 // (The only way to get a 16-byte store is cmpxchg16b)
10603 // FIXME: 16-byte ATOMIC_SWAP isn't actually hooked up at the moment.
10604 if (cast<AtomicSDNode>(Node)->getOrdering() == SequentiallyConsistent ||
10605 !DAG.getTargetLoweringInfo().isTypeLegal(VT)) {
10606 SDValue Swap = DAG.getAtomic(ISD::ATOMIC_SWAP, dl,
10607 cast<AtomicSDNode>(Node)->getMemoryVT(),
10608 Node->getOperand(0),
10609 Node->getOperand(1), Node->getOperand(2),
10610 cast<AtomicSDNode>(Node)->getMemOperand(),
10611 cast<AtomicSDNode>(Node)->getOrdering(),
10612 cast<AtomicSDNode>(Node)->getSynchScope());
10613 return Swap.getValue(1);
10615 // Other atomic stores have a simple pattern.
10619 static SDValue LowerADDC_ADDE_SUBC_SUBE(SDValue Op, SelectionDAG &DAG) {
10620 EVT VT = Op.getNode()->getValueType(0);
10622 // Let legalize expand this if it isn't a legal type yet.
10623 if (!DAG.getTargetLoweringInfo().isTypeLegal(VT))
10626 SDVTList VTs = DAG.getVTList(VT, MVT::i32);
10629 bool ExtraOp = false;
10630 switch (Op.getOpcode()) {
10631 default: assert(0 && "Invalid code");
10632 case ISD::ADDC: Opc = X86ISD::ADD; break;
10633 case ISD::ADDE: Opc = X86ISD::ADC; ExtraOp = true; break;
10634 case ISD::SUBC: Opc = X86ISD::SUB; break;
10635 case ISD::SUBE: Opc = X86ISD::SBB; ExtraOp = true; break;
10639 return DAG.getNode(Opc, Op->getDebugLoc(), VTs, Op.getOperand(0),
10641 return DAG.getNode(Opc, Op->getDebugLoc(), VTs, Op.getOperand(0),
10642 Op.getOperand(1), Op.getOperand(2));
10645 /// LowerOperation - Provide custom lowering hooks for some operations.
10647 SDValue X86TargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const {
10648 switch (Op.getOpcode()) {
10649 default: llvm_unreachable("Should not custom lower this!");
10650 case ISD::SIGN_EXTEND_INREG: return LowerSIGN_EXTEND_INREG(Op,DAG);
10651 case ISD::MEMBARRIER: return LowerMEMBARRIER(Op,DAG);
10652 case ISD::ATOMIC_FENCE: return LowerATOMIC_FENCE(Op,DAG);
10653 case ISD::ATOMIC_CMP_SWAP: return LowerCMP_SWAP(Op,DAG);
10654 case ISD::ATOMIC_LOAD_SUB: return LowerLOAD_SUB(Op,DAG);
10655 case ISD::ATOMIC_STORE: return LowerATOMIC_STORE(Op,DAG);
10656 case ISD::BUILD_VECTOR: return LowerBUILD_VECTOR(Op, DAG);
10657 case ISD::CONCAT_VECTORS: return LowerCONCAT_VECTORS(Op, DAG);
10658 case ISD::VECTOR_SHUFFLE: return LowerVECTOR_SHUFFLE(Op, DAG);
10659 case ISD::EXTRACT_VECTOR_ELT: return LowerEXTRACT_VECTOR_ELT(Op, DAG);
10660 case ISD::INSERT_VECTOR_ELT: return LowerINSERT_VECTOR_ELT(Op, DAG);
10661 case ISD::EXTRACT_SUBVECTOR: return LowerEXTRACT_SUBVECTOR(Op, DAG);
10662 case ISD::INSERT_SUBVECTOR: return LowerINSERT_SUBVECTOR(Op, DAG);
10663 case ISD::SCALAR_TO_VECTOR: return LowerSCALAR_TO_VECTOR(Op, DAG);
10664 case ISD::ConstantPool: return LowerConstantPool(Op, DAG);
10665 case ISD::GlobalAddress: return LowerGlobalAddress(Op, DAG);
10666 case ISD::GlobalTLSAddress: return LowerGlobalTLSAddress(Op, DAG);
10667 case ISD::ExternalSymbol: return LowerExternalSymbol(Op, DAG);
10668 case ISD::BlockAddress: return LowerBlockAddress(Op, DAG);
10669 case ISD::SHL_PARTS:
10670 case ISD::SRA_PARTS:
10671 case ISD::SRL_PARTS: return LowerShiftParts(Op, DAG);
10672 case ISD::SINT_TO_FP: return LowerSINT_TO_FP(Op, DAG);
10673 case ISD::UINT_TO_FP: return LowerUINT_TO_FP(Op, DAG);
10674 case ISD::FP_TO_SINT: return LowerFP_TO_SINT(Op, DAG);
10675 case ISD::FP_TO_UINT: return LowerFP_TO_UINT(Op, DAG);
10676 case ISD::FABS: return LowerFABS(Op, DAG);
10677 case ISD::FNEG: return LowerFNEG(Op, DAG);
10678 case ISD::FCOPYSIGN: return LowerFCOPYSIGN(Op, DAG);
10679 case ISD::FGETSIGN: return LowerFGETSIGN(Op, DAG);
10680 case ISD::SETCC: return LowerSETCC(Op, DAG);
10681 case ISD::SELECT: return LowerSELECT(Op, DAG);
10682 case ISD::BRCOND: return LowerBRCOND(Op, DAG);
10683 case ISD::JumpTable: return LowerJumpTable(Op, DAG);
10684 case ISD::VASTART: return LowerVASTART(Op, DAG);
10685 case ISD::VAARG: return LowerVAARG(Op, DAG);
10686 case ISD::VACOPY: return LowerVACOPY(Op, DAG);
10687 case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG);
10688 case ISD::RETURNADDR: return LowerRETURNADDR(Op, DAG);
10689 case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
10690 case ISD::FRAME_TO_ARGS_OFFSET:
10691 return LowerFRAME_TO_ARGS_OFFSET(Op, DAG);
10692 case ISD::DYNAMIC_STACKALLOC: return LowerDYNAMIC_STACKALLOC(Op, DAG);
10693 case ISD::EH_RETURN: return LowerEH_RETURN(Op, DAG);
10694 case ISD::INIT_TRAMPOLINE: return LowerINIT_TRAMPOLINE(Op, DAG);
10695 case ISD::ADJUST_TRAMPOLINE: return LowerADJUST_TRAMPOLINE(Op, DAG);
10696 case ISD::FLT_ROUNDS_: return LowerFLT_ROUNDS_(Op, DAG);
10697 case ISD::CTLZ: return LowerCTLZ(Op, DAG);
10698 case ISD::CTLZ_ZERO_UNDEF: return LowerCTLZ_ZERO_UNDEF(Op, DAG);
10699 case ISD::CTTZ: return LowerCTTZ(Op, DAG);
10700 case ISD::MUL: return LowerMUL(Op, DAG);
10703 case ISD::SHL: return LowerShift(Op, DAG);
10709 case ISD::UMULO: return LowerXALUO(Op, DAG);
10710 case ISD::READCYCLECOUNTER: return LowerREADCYCLECOUNTER(Op, DAG);
10711 case ISD::BITCAST: return LowerBITCAST(Op, DAG);
10715 case ISD::SUBE: return LowerADDC_ADDE_SUBC_SUBE(Op, DAG);
10716 case ISD::ADD: return LowerADD(Op, DAG);
10717 case ISD::SUB: return LowerSUB(Op, DAG);
10721 static void ReplaceATOMIC_LOAD(SDNode *Node,
10722 SmallVectorImpl<SDValue> &Results,
10723 SelectionDAG &DAG) {
10724 DebugLoc dl = Node->getDebugLoc();
10725 EVT VT = cast<AtomicSDNode>(Node)->getMemoryVT();
10727 // Convert wide load -> cmpxchg8b/cmpxchg16b
10728 // FIXME: On 32-bit, load -> fild or movq would be more efficient
10729 // (The only way to get a 16-byte load is cmpxchg16b)
10730 // FIXME: 16-byte ATOMIC_CMP_SWAP isn't actually hooked up at the moment.
10731 SDValue Zero = DAG.getConstant(0, VT);
10732 SDValue Swap = DAG.getAtomic(ISD::ATOMIC_CMP_SWAP, dl, VT,
10733 Node->getOperand(0),
10734 Node->getOperand(1), Zero, Zero,
10735 cast<AtomicSDNode>(Node)->getMemOperand(),
10736 cast<AtomicSDNode>(Node)->getOrdering(),
10737 cast<AtomicSDNode>(Node)->getSynchScope());
10738 Results.push_back(Swap.getValue(0));
10739 Results.push_back(Swap.getValue(1));
10742 void X86TargetLowering::
10743 ReplaceATOMIC_BINARY_64(SDNode *Node, SmallVectorImpl<SDValue>&Results,
10744 SelectionDAG &DAG, unsigned NewOp) const {
10745 DebugLoc dl = Node->getDebugLoc();
10746 assert (Node->getValueType(0) == MVT::i64 &&
10747 "Only know how to expand i64 atomics");
10749 SDValue Chain = Node->getOperand(0);
10750 SDValue In1 = Node->getOperand(1);
10751 SDValue In2L = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
10752 Node->getOperand(2), DAG.getIntPtrConstant(0));
10753 SDValue In2H = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
10754 Node->getOperand(2), DAG.getIntPtrConstant(1));
10755 SDValue Ops[] = { Chain, In1, In2L, In2H };
10756 SDVTList Tys = DAG.getVTList(MVT::i32, MVT::i32, MVT::Other);
10758 DAG.getMemIntrinsicNode(NewOp, dl, Tys, Ops, 4, MVT::i64,
10759 cast<MemSDNode>(Node)->getMemOperand());
10760 SDValue OpsF[] = { Result.getValue(0), Result.getValue(1)};
10761 Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, OpsF, 2));
10762 Results.push_back(Result.getValue(2));
10765 /// ReplaceNodeResults - Replace a node with an illegal result type
10766 /// with a new node built out of custom code.
10767 void X86TargetLowering::ReplaceNodeResults(SDNode *N,
10768 SmallVectorImpl<SDValue>&Results,
10769 SelectionDAG &DAG) const {
10770 DebugLoc dl = N->getDebugLoc();
10771 switch (N->getOpcode()) {
10773 assert(false && "Do not know how to custom type legalize this operation!");
10775 case ISD::SIGN_EXTEND_INREG:
10780 // We don't want to expand or promote these.
10782 case ISD::FP_TO_SINT: {
10783 std::pair<SDValue,SDValue> Vals =
10784 FP_TO_INTHelper(SDValue(N, 0), DAG, true);
10785 SDValue FIST = Vals.first, StackSlot = Vals.second;
10786 if (FIST.getNode() != 0) {
10787 EVT VT = N->getValueType(0);
10788 // Return a load from the stack slot.
10789 Results.push_back(DAG.getLoad(VT, dl, FIST, StackSlot,
10790 MachinePointerInfo(),
10791 false, false, false, 0));
10795 case ISD::READCYCLECOUNTER: {
10796 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Glue);
10797 SDValue TheChain = N->getOperand(0);
10798 SDValue rd = DAG.getNode(X86ISD::RDTSC_DAG, dl, Tys, &TheChain, 1);
10799 SDValue eax = DAG.getCopyFromReg(rd, dl, X86::EAX, MVT::i32,
10801 SDValue edx = DAG.getCopyFromReg(eax.getValue(1), dl, X86::EDX, MVT::i32,
10803 // Use a buildpair to merge the two 32-bit values into a 64-bit one.
10804 SDValue Ops[] = { eax, edx };
10805 Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Ops, 2));
10806 Results.push_back(edx.getValue(1));
10809 case ISD::ATOMIC_CMP_SWAP: {
10810 EVT T = N->getValueType(0);
10811 assert((T == MVT::i64 || T == MVT::i128) && "can only expand cmpxchg pair");
10812 bool Regs64bit = T == MVT::i128;
10813 EVT HalfT = Regs64bit ? MVT::i64 : MVT::i32;
10814 SDValue cpInL, cpInH;
10815 cpInL = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, HalfT, N->getOperand(2),
10816 DAG.getConstant(0, HalfT));
10817 cpInH = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, HalfT, N->getOperand(2),
10818 DAG.getConstant(1, HalfT));
10819 cpInL = DAG.getCopyToReg(N->getOperand(0), dl,
10820 Regs64bit ? X86::RAX : X86::EAX,
10822 cpInH = DAG.getCopyToReg(cpInL.getValue(0), dl,
10823 Regs64bit ? X86::RDX : X86::EDX,
10824 cpInH, cpInL.getValue(1));
10825 SDValue swapInL, swapInH;
10826 swapInL = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, HalfT, N->getOperand(3),
10827 DAG.getConstant(0, HalfT));
10828 swapInH = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, HalfT, N->getOperand(3),
10829 DAG.getConstant(1, HalfT));
10830 swapInL = DAG.getCopyToReg(cpInH.getValue(0), dl,
10831 Regs64bit ? X86::RBX : X86::EBX,
10832 swapInL, cpInH.getValue(1));
10833 swapInH = DAG.getCopyToReg(swapInL.getValue(0), dl,
10834 Regs64bit ? X86::RCX : X86::ECX,
10835 swapInH, swapInL.getValue(1));
10836 SDValue Ops[] = { swapInH.getValue(0),
10838 swapInH.getValue(1) };
10839 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Glue);
10840 MachineMemOperand *MMO = cast<AtomicSDNode>(N)->getMemOperand();
10841 unsigned Opcode = Regs64bit ? X86ISD::LCMPXCHG16_DAG :
10842 X86ISD::LCMPXCHG8_DAG;
10843 SDValue Result = DAG.getMemIntrinsicNode(Opcode, dl, Tys,
10845 SDValue cpOutL = DAG.getCopyFromReg(Result.getValue(0), dl,
10846 Regs64bit ? X86::RAX : X86::EAX,
10847 HalfT, Result.getValue(1));
10848 SDValue cpOutH = DAG.getCopyFromReg(cpOutL.getValue(1), dl,
10849 Regs64bit ? X86::RDX : X86::EDX,
10850 HalfT, cpOutL.getValue(2));
10851 SDValue OpsF[] = { cpOutL.getValue(0), cpOutH.getValue(0)};
10852 Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, T, OpsF, 2));
10853 Results.push_back(cpOutH.getValue(1));
10856 case ISD::ATOMIC_LOAD_ADD:
10857 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMADD64_DAG);
10859 case ISD::ATOMIC_LOAD_AND:
10860 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMAND64_DAG);
10862 case ISD::ATOMIC_LOAD_NAND:
10863 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMNAND64_DAG);
10865 case ISD::ATOMIC_LOAD_OR:
10866 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMOR64_DAG);
10868 case ISD::ATOMIC_LOAD_SUB:
10869 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMSUB64_DAG);
10871 case ISD::ATOMIC_LOAD_XOR:
10872 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMXOR64_DAG);
10874 case ISD::ATOMIC_SWAP:
10875 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMSWAP64_DAG);
10877 case ISD::ATOMIC_LOAD:
10878 ReplaceATOMIC_LOAD(N, Results, DAG);
10882 const char *X86TargetLowering::getTargetNodeName(unsigned Opcode) const {
10884 default: return NULL;
10885 case X86ISD::BSF: return "X86ISD::BSF";
10886 case X86ISD::BSR: return "X86ISD::BSR";
10887 case X86ISD::SHLD: return "X86ISD::SHLD";
10888 case X86ISD::SHRD: return "X86ISD::SHRD";
10889 case X86ISD::FAND: return "X86ISD::FAND";
10890 case X86ISD::FOR: return "X86ISD::FOR";
10891 case X86ISD::FXOR: return "X86ISD::FXOR";
10892 case X86ISD::FSRL: return "X86ISD::FSRL";
10893 case X86ISD::FILD: return "X86ISD::FILD";
10894 case X86ISD::FILD_FLAG: return "X86ISD::FILD_FLAG";
10895 case X86ISD::FP_TO_INT16_IN_MEM: return "X86ISD::FP_TO_INT16_IN_MEM";
10896 case X86ISD::FP_TO_INT32_IN_MEM: return "X86ISD::FP_TO_INT32_IN_MEM";
10897 case X86ISD::FP_TO_INT64_IN_MEM: return "X86ISD::FP_TO_INT64_IN_MEM";
10898 case X86ISD::FLD: return "X86ISD::FLD";
10899 case X86ISD::FST: return "X86ISD::FST";
10900 case X86ISD::CALL: return "X86ISD::CALL";
10901 case X86ISD::RDTSC_DAG: return "X86ISD::RDTSC_DAG";
10902 case X86ISD::BT: return "X86ISD::BT";
10903 case X86ISD::CMP: return "X86ISD::CMP";
10904 case X86ISD::COMI: return "X86ISD::COMI";
10905 case X86ISD::UCOMI: return "X86ISD::UCOMI";
10906 case X86ISD::SETCC: return "X86ISD::SETCC";
10907 case X86ISD::SETCC_CARRY: return "X86ISD::SETCC_CARRY";
10908 case X86ISD::FSETCCsd: return "X86ISD::FSETCCsd";
10909 case X86ISD::FSETCCss: return "X86ISD::FSETCCss";
10910 case X86ISD::CMOV: return "X86ISD::CMOV";
10911 case X86ISD::BRCOND: return "X86ISD::BRCOND";
10912 case X86ISD::RET_FLAG: return "X86ISD::RET_FLAG";
10913 case X86ISD::REP_STOS: return "X86ISD::REP_STOS";
10914 case X86ISD::REP_MOVS: return "X86ISD::REP_MOVS";
10915 case X86ISD::GlobalBaseReg: return "X86ISD::GlobalBaseReg";
10916 case X86ISD::Wrapper: return "X86ISD::Wrapper";
10917 case X86ISD::WrapperRIP: return "X86ISD::WrapperRIP";
10918 case X86ISD::PEXTRB: return "X86ISD::PEXTRB";
10919 case X86ISD::PEXTRW: return "X86ISD::PEXTRW";
10920 case X86ISD::INSERTPS: return "X86ISD::INSERTPS";
10921 case X86ISD::PINSRB: return "X86ISD::PINSRB";
10922 case X86ISD::PINSRW: return "X86ISD::PINSRW";
10923 case X86ISD::PSHUFB: return "X86ISD::PSHUFB";
10924 case X86ISD::ANDNP: return "X86ISD::ANDNP";
10925 case X86ISD::PSIGN: return "X86ISD::PSIGN";
10926 case X86ISD::BLENDV: return "X86ISD::BLENDV";
10927 case X86ISD::HADD: return "X86ISD::HADD";
10928 case X86ISD::HSUB: return "X86ISD::HSUB";
10929 case X86ISD::FHADD: return "X86ISD::FHADD";
10930 case X86ISD::FHSUB: return "X86ISD::FHSUB";
10931 case X86ISD::FMAX: return "X86ISD::FMAX";
10932 case X86ISD::FMIN: return "X86ISD::FMIN";
10933 case X86ISD::FRSQRT: return "X86ISD::FRSQRT";
10934 case X86ISD::FRCP: return "X86ISD::FRCP";
10935 case X86ISD::TLSADDR: return "X86ISD::TLSADDR";
10936 case X86ISD::TLSCALL: return "X86ISD::TLSCALL";
10937 case X86ISD::EH_RETURN: return "X86ISD::EH_RETURN";
10938 case X86ISD::TC_RETURN: return "X86ISD::TC_RETURN";
10939 case X86ISD::FNSTCW16m: return "X86ISD::FNSTCW16m";
10940 case X86ISD::LCMPXCHG_DAG: return "X86ISD::LCMPXCHG_DAG";
10941 case X86ISD::LCMPXCHG8_DAG: return "X86ISD::LCMPXCHG8_DAG";
10942 case X86ISD::ATOMADD64_DAG: return "X86ISD::ATOMADD64_DAG";
10943 case X86ISD::ATOMSUB64_DAG: return "X86ISD::ATOMSUB64_DAG";
10944 case X86ISD::ATOMOR64_DAG: return "X86ISD::ATOMOR64_DAG";
10945 case X86ISD::ATOMXOR64_DAG: return "X86ISD::ATOMXOR64_DAG";
10946 case X86ISD::ATOMAND64_DAG: return "X86ISD::ATOMAND64_DAG";
10947 case X86ISD::ATOMNAND64_DAG: return "X86ISD::ATOMNAND64_DAG";
10948 case X86ISD::VZEXT_MOVL: return "X86ISD::VZEXT_MOVL";
10949 case X86ISD::VZEXT_LOAD: return "X86ISD::VZEXT_LOAD";
10950 case X86ISD::VSHL: return "X86ISD::VSHL";
10951 case X86ISD::VSRL: return "X86ISD::VSRL";
10952 case X86ISD::CMPPD: return "X86ISD::CMPPD";
10953 case X86ISD::CMPPS: return "X86ISD::CMPPS";
10954 case X86ISD::PCMPEQB: return "X86ISD::PCMPEQB";
10955 case X86ISD::PCMPEQW: return "X86ISD::PCMPEQW";
10956 case X86ISD::PCMPEQD: return "X86ISD::PCMPEQD";
10957 case X86ISD::PCMPEQQ: return "X86ISD::PCMPEQQ";
10958 case X86ISD::PCMPGTB: return "X86ISD::PCMPGTB";
10959 case X86ISD::PCMPGTW: return "X86ISD::PCMPGTW";
10960 case X86ISD::PCMPGTD: return "X86ISD::PCMPGTD";
10961 case X86ISD::PCMPGTQ: return "X86ISD::PCMPGTQ";
10962 case X86ISD::ADD: return "X86ISD::ADD";
10963 case X86ISD::SUB: return "X86ISD::SUB";
10964 case X86ISD::ADC: return "X86ISD::ADC";
10965 case X86ISD::SBB: return "X86ISD::SBB";
10966 case X86ISD::SMUL: return "X86ISD::SMUL";
10967 case X86ISD::UMUL: return "X86ISD::UMUL";
10968 case X86ISD::INC: return "X86ISD::INC";
10969 case X86ISD::DEC: return "X86ISD::DEC";
10970 case X86ISD::OR: return "X86ISD::OR";
10971 case X86ISD::XOR: return "X86ISD::XOR";
10972 case X86ISD::AND: return "X86ISD::AND";
10973 case X86ISD::ANDN: return "X86ISD::ANDN";
10974 case X86ISD::BLSI: return "X86ISD::BLSI";
10975 case X86ISD::BLSMSK: return "X86ISD::BLSMSK";
10976 case X86ISD::BLSR: return "X86ISD::BLSR";
10977 case X86ISD::MUL_IMM: return "X86ISD::MUL_IMM";
10978 case X86ISD::PTEST: return "X86ISD::PTEST";
10979 case X86ISD::TESTP: return "X86ISD::TESTP";
10980 case X86ISD::PALIGN: return "X86ISD::PALIGN";
10981 case X86ISD::PSHUFD: return "X86ISD::PSHUFD";
10982 case X86ISD::PSHUFHW: return "X86ISD::PSHUFHW";
10983 case X86ISD::PSHUFHW_LD: return "X86ISD::PSHUFHW_LD";
10984 case X86ISD::PSHUFLW: return "X86ISD::PSHUFLW";
10985 case X86ISD::PSHUFLW_LD: return "X86ISD::PSHUFLW_LD";
10986 case X86ISD::SHUFP: return "X86ISD::SHUFP";
10987 case X86ISD::MOVLHPS: return "X86ISD::MOVLHPS";
10988 case X86ISD::MOVLHPD: return "X86ISD::MOVLHPD";
10989 case X86ISD::MOVHLPS: return "X86ISD::MOVHLPS";
10990 case X86ISD::MOVLPS: return "X86ISD::MOVLPS";
10991 case X86ISD::MOVLPD: return "X86ISD::MOVLPD";
10992 case X86ISD::MOVDDUP: return "X86ISD::MOVDDUP";
10993 case X86ISD::MOVSHDUP: return "X86ISD::MOVSHDUP";
10994 case X86ISD::MOVSLDUP: return "X86ISD::MOVSLDUP";
10995 case X86ISD::MOVSHDUP_LD: return "X86ISD::MOVSHDUP_LD";
10996 case X86ISD::MOVSLDUP_LD: return "X86ISD::MOVSLDUP_LD";
10997 case X86ISD::MOVSD: return "X86ISD::MOVSD";
10998 case X86ISD::MOVSS: return "X86ISD::MOVSS";
10999 case X86ISD::UNPCKL: return "X86ISD::UNPCKL";
11000 case X86ISD::UNPCKH: return "X86ISD::UNPCKH";
11001 case X86ISD::VBROADCAST: return "X86ISD::VBROADCAST";
11002 case X86ISD::VPERMILP: return "X86ISD::VPERMILP";
11003 case X86ISD::VPERM2X128: return "X86ISD::VPERM2X128";
11004 case X86ISD::VASTART_SAVE_XMM_REGS: return "X86ISD::VASTART_SAVE_XMM_REGS";
11005 case X86ISD::VAARG_64: return "X86ISD::VAARG_64";
11006 case X86ISD::WIN_ALLOCA: return "X86ISD::WIN_ALLOCA";
11007 case X86ISD::MEMBARRIER: return "X86ISD::MEMBARRIER";
11008 case X86ISD::SEG_ALLOCA: return "X86ISD::SEG_ALLOCA";
11012 // isLegalAddressingMode - Return true if the addressing mode represented
11013 // by AM is legal for this target, for a load/store of the specified type.
11014 bool X86TargetLowering::isLegalAddressingMode(const AddrMode &AM,
11016 // X86 supports extremely general addressing modes.
11017 CodeModel::Model M = getTargetMachine().getCodeModel();
11018 Reloc::Model R = getTargetMachine().getRelocationModel();
11020 // X86 allows a sign-extended 32-bit immediate field as a displacement.
11021 if (!X86::isOffsetSuitableForCodeModel(AM.BaseOffs, M, AM.BaseGV != NULL))
11026 Subtarget->ClassifyGlobalReference(AM.BaseGV, getTargetMachine());
11028 // If a reference to this global requires an extra load, we can't fold it.
11029 if (isGlobalStubReference(GVFlags))
11032 // If BaseGV requires a register for the PIC base, we cannot also have a
11033 // BaseReg specified.
11034 if (AM.HasBaseReg && isGlobalRelativeToPICBase(GVFlags))
11037 // If lower 4G is not available, then we must use rip-relative addressing.
11038 if ((M != CodeModel::Small || R != Reloc::Static) &&
11039 Subtarget->is64Bit() && (AM.BaseOffs || AM.Scale > 1))
11043 switch (AM.Scale) {
11049 // These scales always work.
11054 // These scales are formed with basereg+scalereg. Only accept if there is
11059 default: // Other stuff never works.
11067 bool X86TargetLowering::isTruncateFree(Type *Ty1, Type *Ty2) const {
11068 if (!Ty1->isIntegerTy() || !Ty2->isIntegerTy())
11070 unsigned NumBits1 = Ty1->getPrimitiveSizeInBits();
11071 unsigned NumBits2 = Ty2->getPrimitiveSizeInBits();
11072 if (NumBits1 <= NumBits2)
11077 bool X86TargetLowering::isTruncateFree(EVT VT1, EVT VT2) const {
11078 if (!VT1.isInteger() || !VT2.isInteger())
11080 unsigned NumBits1 = VT1.getSizeInBits();
11081 unsigned NumBits2 = VT2.getSizeInBits();
11082 if (NumBits1 <= NumBits2)
11087 bool X86TargetLowering::isZExtFree(Type *Ty1, Type *Ty2) const {
11088 // x86-64 implicitly zero-extends 32-bit results in 64-bit registers.
11089 return Ty1->isIntegerTy(32) && Ty2->isIntegerTy(64) && Subtarget->is64Bit();
11092 bool X86TargetLowering::isZExtFree(EVT VT1, EVT VT2) const {
11093 // x86-64 implicitly zero-extends 32-bit results in 64-bit registers.
11094 return VT1 == MVT::i32 && VT2 == MVT::i64 && Subtarget->is64Bit();
11097 bool X86TargetLowering::isNarrowingProfitable(EVT VT1, EVT VT2) const {
11098 // i16 instructions are longer (0x66 prefix) and potentially slower.
11099 return !(VT1 == MVT::i32 && VT2 == MVT::i16);
11102 /// isShuffleMaskLegal - Targets can use this to indicate that they only
11103 /// support *some* VECTOR_SHUFFLE operations, those with specific masks.
11104 /// By default, if a target supports the VECTOR_SHUFFLE node, all mask values
11105 /// are assumed to be legal.
11107 X86TargetLowering::isShuffleMaskLegal(const SmallVectorImpl<int> &M,
11109 // Very little shuffling can be done for 64-bit vectors right now.
11110 if (VT.getSizeInBits() == 64)
11113 // FIXME: pshufb, blends, shifts.
11114 return (VT.getVectorNumElements() == 2 ||
11115 ShuffleVectorSDNode::isSplatMask(&M[0], VT) ||
11116 isMOVLMask(M, VT) ||
11117 isSHUFPMask(M, VT) ||
11118 isPSHUFDMask(M, VT) ||
11119 isPSHUFHWMask(M, VT) ||
11120 isPSHUFLWMask(M, VT) ||
11121 isPALIGNRMask(M, VT, Subtarget->hasSSSE3()) ||
11122 isUNPCKLMask(M, VT, Subtarget->hasAVX2()) ||
11123 isUNPCKHMask(M, VT, Subtarget->hasAVX2()) ||
11124 isUNPCKL_v_undef_Mask(M, VT, Subtarget->hasAVX2()) ||
11125 isUNPCKH_v_undef_Mask(M, VT, Subtarget->hasAVX2()));
11129 X86TargetLowering::isVectorClearMaskLegal(const SmallVectorImpl<int> &Mask,
11131 unsigned NumElts = VT.getVectorNumElements();
11132 // FIXME: This collection of masks seems suspect.
11135 if (NumElts == 4 && VT.getSizeInBits() == 128) {
11136 return (isMOVLMask(Mask, VT) ||
11137 isCommutedMOVLMask(Mask, VT, true) ||
11138 isSHUFPMask(Mask, VT) ||
11139 isSHUFPMask(Mask, VT, /* Commuted */ true));
11144 //===----------------------------------------------------------------------===//
11145 // X86 Scheduler Hooks
11146 //===----------------------------------------------------------------------===//
11148 // private utility function
11149 MachineBasicBlock *
11150 X86TargetLowering::EmitAtomicBitwiseWithCustomInserter(MachineInstr *bInstr,
11151 MachineBasicBlock *MBB,
11158 TargetRegisterClass *RC,
11159 bool invSrc) const {
11160 // For the atomic bitwise operator, we generate
11163 // ld t1 = [bitinstr.addr]
11164 // op t2 = t1, [bitinstr.val]
11166 // lcs dest = [bitinstr.addr], t2 [EAX is implicit]
11168 // fallthrough -->nextMBB
11169 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
11170 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
11171 MachineFunction::iterator MBBIter = MBB;
11174 /// First build the CFG
11175 MachineFunction *F = MBB->getParent();
11176 MachineBasicBlock *thisMBB = MBB;
11177 MachineBasicBlock *newMBB = F->CreateMachineBasicBlock(LLVM_BB);
11178 MachineBasicBlock *nextMBB = F->CreateMachineBasicBlock(LLVM_BB);
11179 F->insert(MBBIter, newMBB);
11180 F->insert(MBBIter, nextMBB);
11182 // Transfer the remainder of thisMBB and its successor edges to nextMBB.
11183 nextMBB->splice(nextMBB->begin(), thisMBB,
11184 llvm::next(MachineBasicBlock::iterator(bInstr)),
11186 nextMBB->transferSuccessorsAndUpdatePHIs(thisMBB);
11188 // Update thisMBB to fall through to newMBB
11189 thisMBB->addSuccessor(newMBB);
11191 // newMBB jumps to itself and fall through to nextMBB
11192 newMBB->addSuccessor(nextMBB);
11193 newMBB->addSuccessor(newMBB);
11195 // Insert instructions into newMBB based on incoming instruction
11196 assert(bInstr->getNumOperands() < X86::AddrNumOperands + 4 &&
11197 "unexpected number of operands");
11198 DebugLoc dl = bInstr->getDebugLoc();
11199 MachineOperand& destOper = bInstr->getOperand(0);
11200 MachineOperand* argOpers[2 + X86::AddrNumOperands];
11201 int numArgs = bInstr->getNumOperands() - 1;
11202 for (int i=0; i < numArgs; ++i)
11203 argOpers[i] = &bInstr->getOperand(i+1);
11205 // x86 address has 4 operands: base, index, scale, and displacement
11206 int lastAddrIndx = X86::AddrNumOperands - 1; // [0,3]
11207 int valArgIndx = lastAddrIndx + 1;
11209 unsigned t1 = F->getRegInfo().createVirtualRegister(RC);
11210 MachineInstrBuilder MIB = BuildMI(newMBB, dl, TII->get(LoadOpc), t1);
11211 for (int i=0; i <= lastAddrIndx; ++i)
11212 (*MIB).addOperand(*argOpers[i]);
11214 unsigned tt = F->getRegInfo().createVirtualRegister(RC);
11216 MIB = BuildMI(newMBB, dl, TII->get(notOpc), tt).addReg(t1);
11221 unsigned t2 = F->getRegInfo().createVirtualRegister(RC);
11222 assert((argOpers[valArgIndx]->isReg() ||
11223 argOpers[valArgIndx]->isImm()) &&
11224 "invalid operand");
11225 if (argOpers[valArgIndx]->isReg())
11226 MIB = BuildMI(newMBB, dl, TII->get(regOpc), t2);
11228 MIB = BuildMI(newMBB, dl, TII->get(immOpc), t2);
11230 (*MIB).addOperand(*argOpers[valArgIndx]);
11232 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), EAXreg);
11235 MIB = BuildMI(newMBB, dl, TII->get(CXchgOpc));
11236 for (int i=0; i <= lastAddrIndx; ++i)
11237 (*MIB).addOperand(*argOpers[i]);
11239 assert(bInstr->hasOneMemOperand() && "Unexpected number of memoperand");
11240 (*MIB).setMemRefs(bInstr->memoperands_begin(),
11241 bInstr->memoperands_end());
11243 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), destOper.getReg());
11244 MIB.addReg(EAXreg);
11247 BuildMI(newMBB, dl, TII->get(X86::JNE_4)).addMBB(newMBB);
11249 bInstr->eraseFromParent(); // The pseudo instruction is gone now.
11253 // private utility function: 64 bit atomics on 32 bit host.
11254 MachineBasicBlock *
11255 X86TargetLowering::EmitAtomicBit6432WithCustomInserter(MachineInstr *bInstr,
11256 MachineBasicBlock *MBB,
11261 bool invSrc) const {
11262 // For the atomic bitwise operator, we generate
11263 // thisMBB (instructions are in pairs, except cmpxchg8b)
11264 // ld t1,t2 = [bitinstr.addr]
11266 // out1, out2 = phi (thisMBB, t1/t2) (newMBB, t3/t4)
11267 // op t5, t6 <- out1, out2, [bitinstr.val]
11268 // (for SWAP, substitute: mov t5, t6 <- [bitinstr.val])
11269 // mov ECX, EBX <- t5, t6
11270 // mov EAX, EDX <- t1, t2
11271 // cmpxchg8b [bitinstr.addr] [EAX, EDX, EBX, ECX implicit]
11272 // mov t3, t4 <- EAX, EDX
11274 // result in out1, out2
11275 // fallthrough -->nextMBB
11277 const TargetRegisterClass *RC = X86::GR32RegisterClass;
11278 const unsigned LoadOpc = X86::MOV32rm;
11279 const unsigned NotOpc = X86::NOT32r;
11280 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
11281 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
11282 MachineFunction::iterator MBBIter = MBB;
11285 /// First build the CFG
11286 MachineFunction *F = MBB->getParent();
11287 MachineBasicBlock *thisMBB = MBB;
11288 MachineBasicBlock *newMBB = F->CreateMachineBasicBlock(LLVM_BB);
11289 MachineBasicBlock *nextMBB = F->CreateMachineBasicBlock(LLVM_BB);
11290 F->insert(MBBIter, newMBB);
11291 F->insert(MBBIter, nextMBB);
11293 // Transfer the remainder of thisMBB and its successor edges to nextMBB.
11294 nextMBB->splice(nextMBB->begin(), thisMBB,
11295 llvm::next(MachineBasicBlock::iterator(bInstr)),
11297 nextMBB->transferSuccessorsAndUpdatePHIs(thisMBB);
11299 // Update thisMBB to fall through to newMBB
11300 thisMBB->addSuccessor(newMBB);
11302 // newMBB jumps to itself and fall through to nextMBB
11303 newMBB->addSuccessor(nextMBB);
11304 newMBB->addSuccessor(newMBB);
11306 DebugLoc dl = bInstr->getDebugLoc();
11307 // Insert instructions into newMBB based on incoming instruction
11308 // There are 8 "real" operands plus 9 implicit def/uses, ignored here.
11309 assert(bInstr->getNumOperands() < X86::AddrNumOperands + 14 &&
11310 "unexpected number of operands");
11311 MachineOperand& dest1Oper = bInstr->getOperand(0);
11312 MachineOperand& dest2Oper = bInstr->getOperand(1);
11313 MachineOperand* argOpers[2 + X86::AddrNumOperands];
11314 for (int i=0; i < 2 + X86::AddrNumOperands; ++i) {
11315 argOpers[i] = &bInstr->getOperand(i+2);
11317 // We use some of the operands multiple times, so conservatively just
11318 // clear any kill flags that might be present.
11319 if (argOpers[i]->isReg() && argOpers[i]->isUse())
11320 argOpers[i]->setIsKill(false);
11323 // x86 address has 5 operands: base, index, scale, displacement, and segment.
11324 int lastAddrIndx = X86::AddrNumOperands - 1; // [0,3]
11326 unsigned t1 = F->getRegInfo().createVirtualRegister(RC);
11327 MachineInstrBuilder MIB = BuildMI(thisMBB, dl, TII->get(LoadOpc), t1);
11328 for (int i=0; i <= lastAddrIndx; ++i)
11329 (*MIB).addOperand(*argOpers[i]);
11330 unsigned t2 = F->getRegInfo().createVirtualRegister(RC);
11331 MIB = BuildMI(thisMBB, dl, TII->get(LoadOpc), t2);
11332 // add 4 to displacement.
11333 for (int i=0; i <= lastAddrIndx-2; ++i)
11334 (*MIB).addOperand(*argOpers[i]);
11335 MachineOperand newOp3 = *(argOpers[3]);
11336 if (newOp3.isImm())
11337 newOp3.setImm(newOp3.getImm()+4);
11339 newOp3.setOffset(newOp3.getOffset()+4);
11340 (*MIB).addOperand(newOp3);
11341 (*MIB).addOperand(*argOpers[lastAddrIndx]);
11343 // t3/4 are defined later, at the bottom of the loop
11344 unsigned t3 = F->getRegInfo().createVirtualRegister(RC);
11345 unsigned t4 = F->getRegInfo().createVirtualRegister(RC);
11346 BuildMI(newMBB, dl, TII->get(X86::PHI), dest1Oper.getReg())
11347 .addReg(t1).addMBB(thisMBB).addReg(t3).addMBB(newMBB);
11348 BuildMI(newMBB, dl, TII->get(X86::PHI), dest2Oper.getReg())
11349 .addReg(t2).addMBB(thisMBB).addReg(t4).addMBB(newMBB);
11351 // The subsequent operations should be using the destination registers of
11352 //the PHI instructions.
11354 t1 = F->getRegInfo().createVirtualRegister(RC);
11355 t2 = F->getRegInfo().createVirtualRegister(RC);
11356 MIB = BuildMI(newMBB, dl, TII->get(NotOpc), t1).addReg(dest1Oper.getReg());
11357 MIB = BuildMI(newMBB, dl, TII->get(NotOpc), t2).addReg(dest2Oper.getReg());
11359 t1 = dest1Oper.getReg();
11360 t2 = dest2Oper.getReg();
11363 int valArgIndx = lastAddrIndx + 1;
11364 assert((argOpers[valArgIndx]->isReg() ||
11365 argOpers[valArgIndx]->isImm()) &&
11366 "invalid operand");
11367 unsigned t5 = F->getRegInfo().createVirtualRegister(RC);
11368 unsigned t6 = F->getRegInfo().createVirtualRegister(RC);
11369 if (argOpers[valArgIndx]->isReg())
11370 MIB = BuildMI(newMBB, dl, TII->get(regOpcL), t5);
11372 MIB = BuildMI(newMBB, dl, TII->get(immOpcL), t5);
11373 if (regOpcL != X86::MOV32rr)
11375 (*MIB).addOperand(*argOpers[valArgIndx]);
11376 assert(argOpers[valArgIndx + 1]->isReg() ==
11377 argOpers[valArgIndx]->isReg());
11378 assert(argOpers[valArgIndx + 1]->isImm() ==
11379 argOpers[valArgIndx]->isImm());
11380 if (argOpers[valArgIndx + 1]->isReg())
11381 MIB = BuildMI(newMBB, dl, TII->get(regOpcH), t6);
11383 MIB = BuildMI(newMBB, dl, TII->get(immOpcH), t6);
11384 if (regOpcH != X86::MOV32rr)
11386 (*MIB).addOperand(*argOpers[valArgIndx + 1]);
11388 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), X86::EAX);
11390 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), X86::EDX);
11393 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), X86::EBX);
11395 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), X86::ECX);
11398 MIB = BuildMI(newMBB, dl, TII->get(X86::LCMPXCHG8B));
11399 for (int i=0; i <= lastAddrIndx; ++i)
11400 (*MIB).addOperand(*argOpers[i]);
11402 assert(bInstr->hasOneMemOperand() && "Unexpected number of memoperand");
11403 (*MIB).setMemRefs(bInstr->memoperands_begin(),
11404 bInstr->memoperands_end());
11406 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), t3);
11407 MIB.addReg(X86::EAX);
11408 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), t4);
11409 MIB.addReg(X86::EDX);
11412 BuildMI(newMBB, dl, TII->get(X86::JNE_4)).addMBB(newMBB);
11414 bInstr->eraseFromParent(); // The pseudo instruction is gone now.
11418 // private utility function
11419 MachineBasicBlock *
11420 X86TargetLowering::EmitAtomicMinMaxWithCustomInserter(MachineInstr *mInstr,
11421 MachineBasicBlock *MBB,
11422 unsigned cmovOpc) const {
11423 // For the atomic min/max operator, we generate
11426 // ld t1 = [min/max.addr]
11427 // mov t2 = [min/max.val]
11429 // cmov[cond] t2 = t1
11431 // lcs dest = [bitinstr.addr], t2 [EAX is implicit]
11433 // fallthrough -->nextMBB
11435 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
11436 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
11437 MachineFunction::iterator MBBIter = MBB;
11440 /// First build the CFG
11441 MachineFunction *F = MBB->getParent();
11442 MachineBasicBlock *thisMBB = MBB;
11443 MachineBasicBlock *newMBB = F->CreateMachineBasicBlock(LLVM_BB);
11444 MachineBasicBlock *nextMBB = F->CreateMachineBasicBlock(LLVM_BB);
11445 F->insert(MBBIter, newMBB);
11446 F->insert(MBBIter, nextMBB);
11448 // Transfer the remainder of thisMBB and its successor edges to nextMBB.
11449 nextMBB->splice(nextMBB->begin(), thisMBB,
11450 llvm::next(MachineBasicBlock::iterator(mInstr)),
11452 nextMBB->transferSuccessorsAndUpdatePHIs(thisMBB);
11454 // Update thisMBB to fall through to newMBB
11455 thisMBB->addSuccessor(newMBB);
11457 // newMBB jumps to newMBB and fall through to nextMBB
11458 newMBB->addSuccessor(nextMBB);
11459 newMBB->addSuccessor(newMBB);
11461 DebugLoc dl = mInstr->getDebugLoc();
11462 // Insert instructions into newMBB based on incoming instruction
11463 assert(mInstr->getNumOperands() < X86::AddrNumOperands + 4 &&
11464 "unexpected number of operands");
11465 MachineOperand& destOper = mInstr->getOperand(0);
11466 MachineOperand* argOpers[2 + X86::AddrNumOperands];
11467 int numArgs = mInstr->getNumOperands() - 1;
11468 for (int i=0; i < numArgs; ++i)
11469 argOpers[i] = &mInstr->getOperand(i+1);
11471 // x86 address has 4 operands: base, index, scale, and displacement
11472 int lastAddrIndx = X86::AddrNumOperands - 1; // [0,3]
11473 int valArgIndx = lastAddrIndx + 1;
11475 unsigned t1 = F->getRegInfo().createVirtualRegister(X86::GR32RegisterClass);
11476 MachineInstrBuilder MIB = BuildMI(newMBB, dl, TII->get(X86::MOV32rm), t1);
11477 for (int i=0; i <= lastAddrIndx; ++i)
11478 (*MIB).addOperand(*argOpers[i]);
11480 // We only support register and immediate values
11481 assert((argOpers[valArgIndx]->isReg() ||
11482 argOpers[valArgIndx]->isImm()) &&
11483 "invalid operand");
11485 unsigned t2 = F->getRegInfo().createVirtualRegister(X86::GR32RegisterClass);
11486 if (argOpers[valArgIndx]->isReg())
11487 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), t2);
11489 MIB = BuildMI(newMBB, dl, TII->get(X86::MOV32rr), t2);
11490 (*MIB).addOperand(*argOpers[valArgIndx]);
11492 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), X86::EAX);
11495 MIB = BuildMI(newMBB, dl, TII->get(X86::CMP32rr));
11500 unsigned t3 = F->getRegInfo().createVirtualRegister(X86::GR32RegisterClass);
11501 MIB = BuildMI(newMBB, dl, TII->get(cmovOpc),t3);
11505 // Cmp and exchange if none has modified the memory location
11506 MIB = BuildMI(newMBB, dl, TII->get(X86::LCMPXCHG32));
11507 for (int i=0; i <= lastAddrIndx; ++i)
11508 (*MIB).addOperand(*argOpers[i]);
11510 assert(mInstr->hasOneMemOperand() && "Unexpected number of memoperand");
11511 (*MIB).setMemRefs(mInstr->memoperands_begin(),
11512 mInstr->memoperands_end());
11514 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), destOper.getReg());
11515 MIB.addReg(X86::EAX);
11518 BuildMI(newMBB, dl, TII->get(X86::JNE_4)).addMBB(newMBB);
11520 mInstr->eraseFromParent(); // The pseudo instruction is gone now.
11524 // FIXME: When we get size specific XMM0 registers, i.e. XMM0_V16I8
11525 // or XMM0_V32I8 in AVX all of this code can be replaced with that
11526 // in the .td file.
11527 MachineBasicBlock *
11528 X86TargetLowering::EmitPCMP(MachineInstr *MI, MachineBasicBlock *BB,
11529 unsigned numArgs, bool memArg) const {
11530 assert(Subtarget->hasSSE42() &&
11531 "Target must have SSE4.2 or AVX features enabled");
11533 DebugLoc dl = MI->getDebugLoc();
11534 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
11536 if (!Subtarget->hasAVX()) {
11538 Opc = numArgs == 3 ? X86::PCMPISTRM128rm : X86::PCMPESTRM128rm;
11540 Opc = numArgs == 3 ? X86::PCMPISTRM128rr : X86::PCMPESTRM128rr;
11543 Opc = numArgs == 3 ? X86::VPCMPISTRM128rm : X86::VPCMPESTRM128rm;
11545 Opc = numArgs == 3 ? X86::VPCMPISTRM128rr : X86::VPCMPESTRM128rr;
11548 MachineInstrBuilder MIB = BuildMI(*BB, MI, dl, TII->get(Opc));
11549 for (unsigned i = 0; i < numArgs; ++i) {
11550 MachineOperand &Op = MI->getOperand(i+1);
11551 if (!(Op.isReg() && Op.isImplicit()))
11552 MIB.addOperand(Op);
11554 BuildMI(*BB, MI, dl,
11555 TII->get(Subtarget->hasAVX() ? X86::VMOVAPSrr : X86::MOVAPSrr),
11556 MI->getOperand(0).getReg())
11557 .addReg(X86::XMM0);
11559 MI->eraseFromParent();
11563 MachineBasicBlock *
11564 X86TargetLowering::EmitMonitor(MachineInstr *MI, MachineBasicBlock *BB) const {
11565 DebugLoc dl = MI->getDebugLoc();
11566 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
11568 // Address into RAX/EAX, other two args into ECX, EDX.
11569 unsigned MemOpc = Subtarget->is64Bit() ? X86::LEA64r : X86::LEA32r;
11570 unsigned MemReg = Subtarget->is64Bit() ? X86::RAX : X86::EAX;
11571 MachineInstrBuilder MIB = BuildMI(*BB, MI, dl, TII->get(MemOpc), MemReg);
11572 for (int i = 0; i < X86::AddrNumOperands; ++i)
11573 MIB.addOperand(MI->getOperand(i));
11575 unsigned ValOps = X86::AddrNumOperands;
11576 BuildMI(*BB, MI, dl, TII->get(TargetOpcode::COPY), X86::ECX)
11577 .addReg(MI->getOperand(ValOps).getReg());
11578 BuildMI(*BB, MI, dl, TII->get(TargetOpcode::COPY), X86::EDX)
11579 .addReg(MI->getOperand(ValOps+1).getReg());
11581 // The instruction doesn't actually take any operands though.
11582 BuildMI(*BB, MI, dl, TII->get(X86::MONITORrrr));
11584 MI->eraseFromParent(); // The pseudo is gone now.
11588 MachineBasicBlock *
11589 X86TargetLowering::EmitMwait(MachineInstr *MI, MachineBasicBlock *BB) const {
11590 DebugLoc dl = MI->getDebugLoc();
11591 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
11593 // First arg in ECX, the second in EAX.
11594 BuildMI(*BB, MI, dl, TII->get(TargetOpcode::COPY), X86::ECX)
11595 .addReg(MI->getOperand(0).getReg());
11596 BuildMI(*BB, MI, dl, TII->get(TargetOpcode::COPY), X86::EAX)
11597 .addReg(MI->getOperand(1).getReg());
11599 // The instruction doesn't actually take any operands though.
11600 BuildMI(*BB, MI, dl, TII->get(X86::MWAITrr));
11602 MI->eraseFromParent(); // The pseudo is gone now.
11606 MachineBasicBlock *
11607 X86TargetLowering::EmitVAARG64WithCustomInserter(
11609 MachineBasicBlock *MBB) const {
11610 // Emit va_arg instruction on X86-64.
11612 // Operands to this pseudo-instruction:
11613 // 0 ) Output : destination address (reg)
11614 // 1-5) Input : va_list address (addr, i64mem)
11615 // 6 ) ArgSize : Size (in bytes) of vararg type
11616 // 7 ) ArgMode : 0=overflow only, 1=use gp_offset, 2=use fp_offset
11617 // 8 ) Align : Alignment of type
11618 // 9 ) EFLAGS (implicit-def)
11620 assert(MI->getNumOperands() == 10 && "VAARG_64 should have 10 operands!");
11621 assert(X86::AddrNumOperands == 5 && "VAARG_64 assumes 5 address operands");
11623 unsigned DestReg = MI->getOperand(0).getReg();
11624 MachineOperand &Base = MI->getOperand(1);
11625 MachineOperand &Scale = MI->getOperand(2);
11626 MachineOperand &Index = MI->getOperand(3);
11627 MachineOperand &Disp = MI->getOperand(4);
11628 MachineOperand &Segment = MI->getOperand(5);
11629 unsigned ArgSize = MI->getOperand(6).getImm();
11630 unsigned ArgMode = MI->getOperand(7).getImm();
11631 unsigned Align = MI->getOperand(8).getImm();
11633 // Memory Reference
11634 assert(MI->hasOneMemOperand() && "Expected VAARG_64 to have one memoperand");
11635 MachineInstr::mmo_iterator MMOBegin = MI->memoperands_begin();
11636 MachineInstr::mmo_iterator MMOEnd = MI->memoperands_end();
11638 // Machine Information
11639 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
11640 MachineRegisterInfo &MRI = MBB->getParent()->getRegInfo();
11641 const TargetRegisterClass *AddrRegClass = getRegClassFor(MVT::i64);
11642 const TargetRegisterClass *OffsetRegClass = getRegClassFor(MVT::i32);
11643 DebugLoc DL = MI->getDebugLoc();
11645 // struct va_list {
11648 // i64 overflow_area (address)
11649 // i64 reg_save_area (address)
11651 // sizeof(va_list) = 24
11652 // alignment(va_list) = 8
11654 unsigned TotalNumIntRegs = 6;
11655 unsigned TotalNumXMMRegs = 8;
11656 bool UseGPOffset = (ArgMode == 1);
11657 bool UseFPOffset = (ArgMode == 2);
11658 unsigned MaxOffset = TotalNumIntRegs * 8 +
11659 (UseFPOffset ? TotalNumXMMRegs * 16 : 0);
11661 /* Align ArgSize to a multiple of 8 */
11662 unsigned ArgSizeA8 = (ArgSize + 7) & ~7;
11663 bool NeedsAlign = (Align > 8);
11665 MachineBasicBlock *thisMBB = MBB;
11666 MachineBasicBlock *overflowMBB;
11667 MachineBasicBlock *offsetMBB;
11668 MachineBasicBlock *endMBB;
11670 unsigned OffsetDestReg = 0; // Argument address computed by offsetMBB
11671 unsigned OverflowDestReg = 0; // Argument address computed by overflowMBB
11672 unsigned OffsetReg = 0;
11674 if (!UseGPOffset && !UseFPOffset) {
11675 // If we only pull from the overflow region, we don't create a branch.
11676 // We don't need to alter control flow.
11677 OffsetDestReg = 0; // unused
11678 OverflowDestReg = DestReg;
11681 overflowMBB = thisMBB;
11684 // First emit code to check if gp_offset (or fp_offset) is below the bound.
11685 // If so, pull the argument from reg_save_area. (branch to offsetMBB)
11686 // If not, pull from overflow_area. (branch to overflowMBB)
11691 // offsetMBB overflowMBB
11696 // Registers for the PHI in endMBB
11697 OffsetDestReg = MRI.createVirtualRegister(AddrRegClass);
11698 OverflowDestReg = MRI.createVirtualRegister(AddrRegClass);
11700 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
11701 MachineFunction *MF = MBB->getParent();
11702 overflowMBB = MF->CreateMachineBasicBlock(LLVM_BB);
11703 offsetMBB = MF->CreateMachineBasicBlock(LLVM_BB);
11704 endMBB = MF->CreateMachineBasicBlock(LLVM_BB);
11706 MachineFunction::iterator MBBIter = MBB;
11709 // Insert the new basic blocks
11710 MF->insert(MBBIter, offsetMBB);
11711 MF->insert(MBBIter, overflowMBB);
11712 MF->insert(MBBIter, endMBB);
11714 // Transfer the remainder of MBB and its successor edges to endMBB.
11715 endMBB->splice(endMBB->begin(), thisMBB,
11716 llvm::next(MachineBasicBlock::iterator(MI)),
11718 endMBB->transferSuccessorsAndUpdatePHIs(thisMBB);
11720 // Make offsetMBB and overflowMBB successors of thisMBB
11721 thisMBB->addSuccessor(offsetMBB);
11722 thisMBB->addSuccessor(overflowMBB);
11724 // endMBB is a successor of both offsetMBB and overflowMBB
11725 offsetMBB->addSuccessor(endMBB);
11726 overflowMBB->addSuccessor(endMBB);
11728 // Load the offset value into a register
11729 OffsetReg = MRI.createVirtualRegister(OffsetRegClass);
11730 BuildMI(thisMBB, DL, TII->get(X86::MOV32rm), OffsetReg)
11734 .addDisp(Disp, UseFPOffset ? 4 : 0)
11735 .addOperand(Segment)
11736 .setMemRefs(MMOBegin, MMOEnd);
11738 // Check if there is enough room left to pull this argument.
11739 BuildMI(thisMBB, DL, TII->get(X86::CMP32ri))
11741 .addImm(MaxOffset + 8 - ArgSizeA8);
11743 // Branch to "overflowMBB" if offset >= max
11744 // Fall through to "offsetMBB" otherwise
11745 BuildMI(thisMBB, DL, TII->get(X86::GetCondBranchFromCond(X86::COND_AE)))
11746 .addMBB(overflowMBB);
11749 // In offsetMBB, emit code to use the reg_save_area.
11751 assert(OffsetReg != 0);
11753 // Read the reg_save_area address.
11754 unsigned RegSaveReg = MRI.createVirtualRegister(AddrRegClass);
11755 BuildMI(offsetMBB, DL, TII->get(X86::MOV64rm), RegSaveReg)
11760 .addOperand(Segment)
11761 .setMemRefs(MMOBegin, MMOEnd);
11763 // Zero-extend the offset
11764 unsigned OffsetReg64 = MRI.createVirtualRegister(AddrRegClass);
11765 BuildMI(offsetMBB, DL, TII->get(X86::SUBREG_TO_REG), OffsetReg64)
11768 .addImm(X86::sub_32bit);
11770 // Add the offset to the reg_save_area to get the final address.
11771 BuildMI(offsetMBB, DL, TII->get(X86::ADD64rr), OffsetDestReg)
11772 .addReg(OffsetReg64)
11773 .addReg(RegSaveReg);
11775 // Compute the offset for the next argument
11776 unsigned NextOffsetReg = MRI.createVirtualRegister(OffsetRegClass);
11777 BuildMI(offsetMBB, DL, TII->get(X86::ADD32ri), NextOffsetReg)
11779 .addImm(UseFPOffset ? 16 : 8);
11781 // Store it back into the va_list.
11782 BuildMI(offsetMBB, DL, TII->get(X86::MOV32mr))
11786 .addDisp(Disp, UseFPOffset ? 4 : 0)
11787 .addOperand(Segment)
11788 .addReg(NextOffsetReg)
11789 .setMemRefs(MMOBegin, MMOEnd);
11792 BuildMI(offsetMBB, DL, TII->get(X86::JMP_4))
11797 // Emit code to use overflow area
11800 // Load the overflow_area address into a register.
11801 unsigned OverflowAddrReg = MRI.createVirtualRegister(AddrRegClass);
11802 BuildMI(overflowMBB, DL, TII->get(X86::MOV64rm), OverflowAddrReg)
11807 .addOperand(Segment)
11808 .setMemRefs(MMOBegin, MMOEnd);
11810 // If we need to align it, do so. Otherwise, just copy the address
11811 // to OverflowDestReg.
11813 // Align the overflow address
11814 assert((Align & (Align-1)) == 0 && "Alignment must be a power of 2");
11815 unsigned TmpReg = MRI.createVirtualRegister(AddrRegClass);
11817 // aligned_addr = (addr + (align-1)) & ~(align-1)
11818 BuildMI(overflowMBB, DL, TII->get(X86::ADD64ri32), TmpReg)
11819 .addReg(OverflowAddrReg)
11822 BuildMI(overflowMBB, DL, TII->get(X86::AND64ri32), OverflowDestReg)
11824 .addImm(~(uint64_t)(Align-1));
11826 BuildMI(overflowMBB, DL, TII->get(TargetOpcode::COPY), OverflowDestReg)
11827 .addReg(OverflowAddrReg);
11830 // Compute the next overflow address after this argument.
11831 // (the overflow address should be kept 8-byte aligned)
11832 unsigned NextAddrReg = MRI.createVirtualRegister(AddrRegClass);
11833 BuildMI(overflowMBB, DL, TII->get(X86::ADD64ri32), NextAddrReg)
11834 .addReg(OverflowDestReg)
11835 .addImm(ArgSizeA8);
11837 // Store the new overflow address.
11838 BuildMI(overflowMBB, DL, TII->get(X86::MOV64mr))
11843 .addOperand(Segment)
11844 .addReg(NextAddrReg)
11845 .setMemRefs(MMOBegin, MMOEnd);
11847 // If we branched, emit the PHI to the front of endMBB.
11849 BuildMI(*endMBB, endMBB->begin(), DL,
11850 TII->get(X86::PHI), DestReg)
11851 .addReg(OffsetDestReg).addMBB(offsetMBB)
11852 .addReg(OverflowDestReg).addMBB(overflowMBB);
11855 // Erase the pseudo instruction
11856 MI->eraseFromParent();
11861 MachineBasicBlock *
11862 X86TargetLowering::EmitVAStartSaveXMMRegsWithCustomInserter(
11864 MachineBasicBlock *MBB) const {
11865 // Emit code to save XMM registers to the stack. The ABI says that the
11866 // number of registers to save is given in %al, so it's theoretically
11867 // possible to do an indirect jump trick to avoid saving all of them,
11868 // however this code takes a simpler approach and just executes all
11869 // of the stores if %al is non-zero. It's less code, and it's probably
11870 // easier on the hardware branch predictor, and stores aren't all that
11871 // expensive anyway.
11873 // Create the new basic blocks. One block contains all the XMM stores,
11874 // and one block is the final destination regardless of whether any
11875 // stores were performed.
11876 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
11877 MachineFunction *F = MBB->getParent();
11878 MachineFunction::iterator MBBIter = MBB;
11880 MachineBasicBlock *XMMSaveMBB = F->CreateMachineBasicBlock(LLVM_BB);
11881 MachineBasicBlock *EndMBB = F->CreateMachineBasicBlock(LLVM_BB);
11882 F->insert(MBBIter, XMMSaveMBB);
11883 F->insert(MBBIter, EndMBB);
11885 // Transfer the remainder of MBB and its successor edges to EndMBB.
11886 EndMBB->splice(EndMBB->begin(), MBB,
11887 llvm::next(MachineBasicBlock::iterator(MI)),
11889 EndMBB->transferSuccessorsAndUpdatePHIs(MBB);
11891 // The original block will now fall through to the XMM save block.
11892 MBB->addSuccessor(XMMSaveMBB);
11893 // The XMMSaveMBB will fall through to the end block.
11894 XMMSaveMBB->addSuccessor(EndMBB);
11896 // Now add the instructions.
11897 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
11898 DebugLoc DL = MI->getDebugLoc();
11900 unsigned CountReg = MI->getOperand(0).getReg();
11901 int64_t RegSaveFrameIndex = MI->getOperand(1).getImm();
11902 int64_t VarArgsFPOffset = MI->getOperand(2).getImm();
11904 if (!Subtarget->isTargetWin64()) {
11905 // If %al is 0, branch around the XMM save block.
11906 BuildMI(MBB, DL, TII->get(X86::TEST8rr)).addReg(CountReg).addReg(CountReg);
11907 BuildMI(MBB, DL, TII->get(X86::JE_4)).addMBB(EndMBB);
11908 MBB->addSuccessor(EndMBB);
11911 unsigned MOVOpc = Subtarget->hasAVX() ? X86::VMOVAPSmr : X86::MOVAPSmr;
11912 // In the XMM save block, save all the XMM argument registers.
11913 for (int i = 3, e = MI->getNumOperands(); i != e; ++i) {
11914 int64_t Offset = (i - 3) * 16 + VarArgsFPOffset;
11915 MachineMemOperand *MMO =
11916 F->getMachineMemOperand(
11917 MachinePointerInfo::getFixedStack(RegSaveFrameIndex, Offset),
11918 MachineMemOperand::MOStore,
11919 /*Size=*/16, /*Align=*/16);
11920 BuildMI(XMMSaveMBB, DL, TII->get(MOVOpc))
11921 .addFrameIndex(RegSaveFrameIndex)
11922 .addImm(/*Scale=*/1)
11923 .addReg(/*IndexReg=*/0)
11924 .addImm(/*Disp=*/Offset)
11925 .addReg(/*Segment=*/0)
11926 .addReg(MI->getOperand(i).getReg())
11927 .addMemOperand(MMO);
11930 MI->eraseFromParent(); // The pseudo instruction is gone now.
11935 MachineBasicBlock *
11936 X86TargetLowering::EmitLoweredSelect(MachineInstr *MI,
11937 MachineBasicBlock *BB) const {
11938 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
11939 DebugLoc DL = MI->getDebugLoc();
11941 // To "insert" a SELECT_CC instruction, we actually have to insert the
11942 // diamond control-flow pattern. The incoming instruction knows the
11943 // destination vreg to set, the condition code register to branch on, the
11944 // true/false values to select between, and a branch opcode to use.
11945 const BasicBlock *LLVM_BB = BB->getBasicBlock();
11946 MachineFunction::iterator It = BB;
11952 // cmpTY ccX, r1, r2
11954 // fallthrough --> copy0MBB
11955 MachineBasicBlock *thisMBB = BB;
11956 MachineFunction *F = BB->getParent();
11957 MachineBasicBlock *copy0MBB = F->CreateMachineBasicBlock(LLVM_BB);
11958 MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB);
11959 F->insert(It, copy0MBB);
11960 F->insert(It, sinkMBB);
11962 // If the EFLAGS register isn't dead in the terminator, then claim that it's
11963 // live into the sink and copy blocks.
11964 if (!MI->killsRegister(X86::EFLAGS)) {
11965 copy0MBB->addLiveIn(X86::EFLAGS);
11966 sinkMBB->addLiveIn(X86::EFLAGS);
11969 // Transfer the remainder of BB and its successor edges to sinkMBB.
11970 sinkMBB->splice(sinkMBB->begin(), BB,
11971 llvm::next(MachineBasicBlock::iterator(MI)),
11973 sinkMBB->transferSuccessorsAndUpdatePHIs(BB);
11975 // Add the true and fallthrough blocks as its successors.
11976 BB->addSuccessor(copy0MBB);
11977 BB->addSuccessor(sinkMBB);
11979 // Create the conditional branch instruction.
11981 X86::GetCondBranchFromCond((X86::CondCode)MI->getOperand(3).getImm());
11982 BuildMI(BB, DL, TII->get(Opc)).addMBB(sinkMBB);
11985 // %FalseValue = ...
11986 // # fallthrough to sinkMBB
11987 copy0MBB->addSuccessor(sinkMBB);
11990 // %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
11992 BuildMI(*sinkMBB, sinkMBB->begin(), DL,
11993 TII->get(X86::PHI), MI->getOperand(0).getReg())
11994 .addReg(MI->getOperand(1).getReg()).addMBB(copy0MBB)
11995 .addReg(MI->getOperand(2).getReg()).addMBB(thisMBB);
11997 MI->eraseFromParent(); // The pseudo instruction is gone now.
12001 MachineBasicBlock *
12002 X86TargetLowering::EmitLoweredSegAlloca(MachineInstr *MI, MachineBasicBlock *BB,
12003 bool Is64Bit) const {
12004 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
12005 DebugLoc DL = MI->getDebugLoc();
12006 MachineFunction *MF = BB->getParent();
12007 const BasicBlock *LLVM_BB = BB->getBasicBlock();
12009 assert(getTargetMachine().Options.EnableSegmentedStacks);
12011 unsigned TlsReg = Is64Bit ? X86::FS : X86::GS;
12012 unsigned TlsOffset = Is64Bit ? 0x70 : 0x30;
12015 // ... [Till the alloca]
12016 // If stacklet is not large enough, jump to mallocMBB
12019 // Allocate by subtracting from RSP
12020 // Jump to continueMBB
12023 // Allocate by call to runtime
12027 // [rest of original BB]
12030 MachineBasicBlock *mallocMBB = MF->CreateMachineBasicBlock(LLVM_BB);
12031 MachineBasicBlock *bumpMBB = MF->CreateMachineBasicBlock(LLVM_BB);
12032 MachineBasicBlock *continueMBB = MF->CreateMachineBasicBlock(LLVM_BB);
12034 MachineRegisterInfo &MRI = MF->getRegInfo();
12035 const TargetRegisterClass *AddrRegClass =
12036 getRegClassFor(Is64Bit ? MVT::i64:MVT::i32);
12038 unsigned mallocPtrVReg = MRI.createVirtualRegister(AddrRegClass),
12039 bumpSPPtrVReg = MRI.createVirtualRegister(AddrRegClass),
12040 tmpSPVReg = MRI.createVirtualRegister(AddrRegClass),
12041 SPLimitVReg = MRI.createVirtualRegister(AddrRegClass),
12042 sizeVReg = MI->getOperand(1).getReg(),
12043 physSPReg = Is64Bit ? X86::RSP : X86::ESP;
12045 MachineFunction::iterator MBBIter = BB;
12048 MF->insert(MBBIter, bumpMBB);
12049 MF->insert(MBBIter, mallocMBB);
12050 MF->insert(MBBIter, continueMBB);
12052 continueMBB->splice(continueMBB->begin(), BB, llvm::next
12053 (MachineBasicBlock::iterator(MI)), BB->end());
12054 continueMBB->transferSuccessorsAndUpdatePHIs(BB);
12056 // Add code to the main basic block to check if the stack limit has been hit,
12057 // and if so, jump to mallocMBB otherwise to bumpMBB.
12058 BuildMI(BB, DL, TII->get(TargetOpcode::COPY), tmpSPVReg).addReg(physSPReg);
12059 BuildMI(BB, DL, TII->get(Is64Bit ? X86::SUB64rr:X86::SUB32rr), SPLimitVReg)
12060 .addReg(tmpSPVReg).addReg(sizeVReg);
12061 BuildMI(BB, DL, TII->get(Is64Bit ? X86::CMP64mr:X86::CMP32mr))
12062 .addReg(0).addImm(1).addReg(0).addImm(TlsOffset).addReg(TlsReg)
12063 .addReg(SPLimitVReg);
12064 BuildMI(BB, DL, TII->get(X86::JG_4)).addMBB(mallocMBB);
12066 // bumpMBB simply decreases the stack pointer, since we know the current
12067 // stacklet has enough space.
12068 BuildMI(bumpMBB, DL, TII->get(TargetOpcode::COPY), physSPReg)
12069 .addReg(SPLimitVReg);
12070 BuildMI(bumpMBB, DL, TII->get(TargetOpcode::COPY), bumpSPPtrVReg)
12071 .addReg(SPLimitVReg);
12072 BuildMI(bumpMBB, DL, TII->get(X86::JMP_4)).addMBB(continueMBB);
12074 // Calls into a routine in libgcc to allocate more space from the heap.
12076 BuildMI(mallocMBB, DL, TII->get(X86::MOV64rr), X86::RDI)
12078 BuildMI(mallocMBB, DL, TII->get(X86::CALL64pcrel32))
12079 .addExternalSymbol("__morestack_allocate_stack_space").addReg(X86::RDI);
12081 BuildMI(mallocMBB, DL, TII->get(X86::SUB32ri), physSPReg).addReg(physSPReg)
12083 BuildMI(mallocMBB, DL, TII->get(X86::PUSH32r)).addReg(sizeVReg);
12084 BuildMI(mallocMBB, DL, TII->get(X86::CALLpcrel32))
12085 .addExternalSymbol("__morestack_allocate_stack_space");
12089 BuildMI(mallocMBB, DL, TII->get(X86::ADD32ri), physSPReg).addReg(physSPReg)
12092 BuildMI(mallocMBB, DL, TII->get(TargetOpcode::COPY), mallocPtrVReg)
12093 .addReg(Is64Bit ? X86::RAX : X86::EAX);
12094 BuildMI(mallocMBB, DL, TII->get(X86::JMP_4)).addMBB(continueMBB);
12096 // Set up the CFG correctly.
12097 BB->addSuccessor(bumpMBB);
12098 BB->addSuccessor(mallocMBB);
12099 mallocMBB->addSuccessor(continueMBB);
12100 bumpMBB->addSuccessor(continueMBB);
12102 // Take care of the PHI nodes.
12103 BuildMI(*continueMBB, continueMBB->begin(), DL, TII->get(X86::PHI),
12104 MI->getOperand(0).getReg())
12105 .addReg(mallocPtrVReg).addMBB(mallocMBB)
12106 .addReg(bumpSPPtrVReg).addMBB(bumpMBB);
12108 // Delete the original pseudo instruction.
12109 MI->eraseFromParent();
12112 return continueMBB;
12115 MachineBasicBlock *
12116 X86TargetLowering::EmitLoweredWinAlloca(MachineInstr *MI,
12117 MachineBasicBlock *BB) const {
12118 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
12119 DebugLoc DL = MI->getDebugLoc();
12121 assert(!Subtarget->isTargetEnvMacho());
12123 // The lowering is pretty easy: we're just emitting the call to _alloca. The
12124 // non-trivial part is impdef of ESP.
12126 if (Subtarget->isTargetWin64()) {
12127 if (Subtarget->isTargetCygMing()) {
12128 // ___chkstk(Mingw64):
12129 // Clobbers R10, R11, RAX and EFLAGS.
12131 BuildMI(*BB, MI, DL, TII->get(X86::W64ALLOCA))
12132 .addExternalSymbol("___chkstk")
12133 .addReg(X86::RAX, RegState::Implicit)
12134 .addReg(X86::RSP, RegState::Implicit)
12135 .addReg(X86::RAX, RegState::Define | RegState::Implicit)
12136 .addReg(X86::RSP, RegState::Define | RegState::Implicit)
12137 .addReg(X86::EFLAGS, RegState::Define | RegState::Implicit);
12139 // __chkstk(MSVCRT): does not update stack pointer.
12140 // Clobbers R10, R11 and EFLAGS.
12141 // FIXME: RAX(allocated size) might be reused and not killed.
12142 BuildMI(*BB, MI, DL, TII->get(X86::W64ALLOCA))
12143 .addExternalSymbol("__chkstk")
12144 .addReg(X86::RAX, RegState::Implicit)
12145 .addReg(X86::EFLAGS, RegState::Define | RegState::Implicit);
12146 // RAX has the offset to subtracted from RSP.
12147 BuildMI(*BB, MI, DL, TII->get(X86::SUB64rr), X86::RSP)
12152 const char *StackProbeSymbol =
12153 Subtarget->isTargetWindows() ? "_chkstk" : "_alloca";
12155 BuildMI(*BB, MI, DL, TII->get(X86::CALLpcrel32))
12156 .addExternalSymbol(StackProbeSymbol)
12157 .addReg(X86::EAX, RegState::Implicit)
12158 .addReg(X86::ESP, RegState::Implicit)
12159 .addReg(X86::EAX, RegState::Define | RegState::Implicit)
12160 .addReg(X86::ESP, RegState::Define | RegState::Implicit)
12161 .addReg(X86::EFLAGS, RegState::Define | RegState::Implicit);
12164 MI->eraseFromParent(); // The pseudo instruction is gone now.
12168 MachineBasicBlock *
12169 X86TargetLowering::EmitLoweredTLSCall(MachineInstr *MI,
12170 MachineBasicBlock *BB) const {
12171 // This is pretty easy. We're taking the value that we received from
12172 // our load from the relocation, sticking it in either RDI (x86-64)
12173 // or EAX and doing an indirect call. The return value will then
12174 // be in the normal return register.
12175 const X86InstrInfo *TII
12176 = static_cast<const X86InstrInfo*>(getTargetMachine().getInstrInfo());
12177 DebugLoc DL = MI->getDebugLoc();
12178 MachineFunction *F = BB->getParent();
12180 assert(Subtarget->isTargetDarwin() && "Darwin only instr emitted?");
12181 assert(MI->getOperand(3).isGlobal() && "This should be a global");
12183 if (Subtarget->is64Bit()) {
12184 MachineInstrBuilder MIB = BuildMI(*BB, MI, DL,
12185 TII->get(X86::MOV64rm), X86::RDI)
12187 .addImm(0).addReg(0)
12188 .addGlobalAddress(MI->getOperand(3).getGlobal(), 0,
12189 MI->getOperand(3).getTargetFlags())
12191 MIB = BuildMI(*BB, MI, DL, TII->get(X86::CALL64m));
12192 addDirectMem(MIB, X86::RDI);
12193 } else if (getTargetMachine().getRelocationModel() != Reloc::PIC_) {
12194 MachineInstrBuilder MIB = BuildMI(*BB, MI, DL,
12195 TII->get(X86::MOV32rm), X86::EAX)
12197 .addImm(0).addReg(0)
12198 .addGlobalAddress(MI->getOperand(3).getGlobal(), 0,
12199 MI->getOperand(3).getTargetFlags())
12201 MIB = BuildMI(*BB, MI, DL, TII->get(X86::CALL32m));
12202 addDirectMem(MIB, X86::EAX);
12204 MachineInstrBuilder MIB = BuildMI(*BB, MI, DL,
12205 TII->get(X86::MOV32rm), X86::EAX)
12206 .addReg(TII->getGlobalBaseReg(F))
12207 .addImm(0).addReg(0)
12208 .addGlobalAddress(MI->getOperand(3).getGlobal(), 0,
12209 MI->getOperand(3).getTargetFlags())
12211 MIB = BuildMI(*BB, MI, DL, TII->get(X86::CALL32m));
12212 addDirectMem(MIB, X86::EAX);
12215 MI->eraseFromParent(); // The pseudo instruction is gone now.
12219 MachineBasicBlock *
12220 X86TargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
12221 MachineBasicBlock *BB) const {
12222 switch (MI->getOpcode()) {
12223 default: assert(0 && "Unexpected instr type to insert");
12224 case X86::TAILJMPd64:
12225 case X86::TAILJMPr64:
12226 case X86::TAILJMPm64:
12227 assert(0 && "TAILJMP64 would not be touched here.");
12228 case X86::TCRETURNdi64:
12229 case X86::TCRETURNri64:
12230 case X86::TCRETURNmi64:
12231 // Defs of TCRETURNxx64 has Win64's callee-saved registers, as subset.
12232 // On AMD64, additional defs should be added before register allocation.
12233 if (!Subtarget->isTargetWin64()) {
12234 MI->addRegisterDefined(X86::RSI);
12235 MI->addRegisterDefined(X86::RDI);
12236 MI->addRegisterDefined(X86::XMM6);
12237 MI->addRegisterDefined(X86::XMM7);
12238 MI->addRegisterDefined(X86::XMM8);
12239 MI->addRegisterDefined(X86::XMM9);
12240 MI->addRegisterDefined(X86::XMM10);
12241 MI->addRegisterDefined(X86::XMM11);
12242 MI->addRegisterDefined(X86::XMM12);
12243 MI->addRegisterDefined(X86::XMM13);
12244 MI->addRegisterDefined(X86::XMM14);
12245 MI->addRegisterDefined(X86::XMM15);
12248 case X86::WIN_ALLOCA:
12249 return EmitLoweredWinAlloca(MI, BB);
12250 case X86::SEG_ALLOCA_32:
12251 return EmitLoweredSegAlloca(MI, BB, false);
12252 case X86::SEG_ALLOCA_64:
12253 return EmitLoweredSegAlloca(MI, BB, true);
12254 case X86::TLSCall_32:
12255 case X86::TLSCall_64:
12256 return EmitLoweredTLSCall(MI, BB);
12257 case X86::CMOV_GR8:
12258 case X86::CMOV_FR32:
12259 case X86::CMOV_FR64:
12260 case X86::CMOV_V4F32:
12261 case X86::CMOV_V2F64:
12262 case X86::CMOV_V2I64:
12263 case X86::CMOV_V8F32:
12264 case X86::CMOV_V4F64:
12265 case X86::CMOV_V4I64:
12266 case X86::CMOV_GR16:
12267 case X86::CMOV_GR32:
12268 case X86::CMOV_RFP32:
12269 case X86::CMOV_RFP64:
12270 case X86::CMOV_RFP80:
12271 return EmitLoweredSelect(MI, BB);
12273 case X86::FP32_TO_INT16_IN_MEM:
12274 case X86::FP32_TO_INT32_IN_MEM:
12275 case X86::FP32_TO_INT64_IN_MEM:
12276 case X86::FP64_TO_INT16_IN_MEM:
12277 case X86::FP64_TO_INT32_IN_MEM:
12278 case X86::FP64_TO_INT64_IN_MEM:
12279 case X86::FP80_TO_INT16_IN_MEM:
12280 case X86::FP80_TO_INT32_IN_MEM:
12281 case X86::FP80_TO_INT64_IN_MEM: {
12282 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
12283 DebugLoc DL = MI->getDebugLoc();
12285 // Change the floating point control register to use "round towards zero"
12286 // mode when truncating to an integer value.
12287 MachineFunction *F = BB->getParent();
12288 int CWFrameIdx = F->getFrameInfo()->CreateStackObject(2, 2, false);
12289 addFrameReference(BuildMI(*BB, MI, DL,
12290 TII->get(X86::FNSTCW16m)), CWFrameIdx);
12292 // Load the old value of the high byte of the control word...
12294 F->getRegInfo().createVirtualRegister(X86::GR16RegisterClass);
12295 addFrameReference(BuildMI(*BB, MI, DL, TII->get(X86::MOV16rm), OldCW),
12298 // Set the high part to be round to zero...
12299 addFrameReference(BuildMI(*BB, MI, DL, TII->get(X86::MOV16mi)), CWFrameIdx)
12302 // Reload the modified control word now...
12303 addFrameReference(BuildMI(*BB, MI, DL,
12304 TII->get(X86::FLDCW16m)), CWFrameIdx);
12306 // Restore the memory image of control word to original value
12307 addFrameReference(BuildMI(*BB, MI, DL, TII->get(X86::MOV16mr)), CWFrameIdx)
12310 // Get the X86 opcode to use.
12312 switch (MI->getOpcode()) {
12313 default: llvm_unreachable("illegal opcode!");
12314 case X86::FP32_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m32; break;
12315 case X86::FP32_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m32; break;
12316 case X86::FP32_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m32; break;
12317 case X86::FP64_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m64; break;
12318 case X86::FP64_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m64; break;
12319 case X86::FP64_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m64; break;
12320 case X86::FP80_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m80; break;
12321 case X86::FP80_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m80; break;
12322 case X86::FP80_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m80; break;
12326 MachineOperand &Op = MI->getOperand(0);
12328 AM.BaseType = X86AddressMode::RegBase;
12329 AM.Base.Reg = Op.getReg();
12331 AM.BaseType = X86AddressMode::FrameIndexBase;
12332 AM.Base.FrameIndex = Op.getIndex();
12334 Op = MI->getOperand(1);
12336 AM.Scale = Op.getImm();
12337 Op = MI->getOperand(2);
12339 AM.IndexReg = Op.getImm();
12340 Op = MI->getOperand(3);
12341 if (Op.isGlobal()) {
12342 AM.GV = Op.getGlobal();
12344 AM.Disp = Op.getImm();
12346 addFullAddress(BuildMI(*BB, MI, DL, TII->get(Opc)), AM)
12347 .addReg(MI->getOperand(X86::AddrNumOperands).getReg());
12349 // Reload the original control word now.
12350 addFrameReference(BuildMI(*BB, MI, DL,
12351 TII->get(X86::FLDCW16m)), CWFrameIdx);
12353 MI->eraseFromParent(); // The pseudo instruction is gone now.
12356 // String/text processing lowering.
12357 case X86::PCMPISTRM128REG:
12358 case X86::VPCMPISTRM128REG:
12359 return EmitPCMP(MI, BB, 3, false /* in-mem */);
12360 case X86::PCMPISTRM128MEM:
12361 case X86::VPCMPISTRM128MEM:
12362 return EmitPCMP(MI, BB, 3, true /* in-mem */);
12363 case X86::PCMPESTRM128REG:
12364 case X86::VPCMPESTRM128REG:
12365 return EmitPCMP(MI, BB, 5, false /* in mem */);
12366 case X86::PCMPESTRM128MEM:
12367 case X86::VPCMPESTRM128MEM:
12368 return EmitPCMP(MI, BB, 5, true /* in mem */);
12370 // Thread synchronization.
12372 return EmitMonitor(MI, BB);
12374 return EmitMwait(MI, BB);
12376 // Atomic Lowering.
12377 case X86::ATOMAND32:
12378 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND32rr,
12379 X86::AND32ri, X86::MOV32rm,
12381 X86::NOT32r, X86::EAX,
12382 X86::GR32RegisterClass);
12383 case X86::ATOMOR32:
12384 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::OR32rr,
12385 X86::OR32ri, X86::MOV32rm,
12387 X86::NOT32r, X86::EAX,
12388 X86::GR32RegisterClass);
12389 case X86::ATOMXOR32:
12390 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::XOR32rr,
12391 X86::XOR32ri, X86::MOV32rm,
12393 X86::NOT32r, X86::EAX,
12394 X86::GR32RegisterClass);
12395 case X86::ATOMNAND32:
12396 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND32rr,
12397 X86::AND32ri, X86::MOV32rm,
12399 X86::NOT32r, X86::EAX,
12400 X86::GR32RegisterClass, true);
12401 case X86::ATOMMIN32:
12402 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVL32rr);
12403 case X86::ATOMMAX32:
12404 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVG32rr);
12405 case X86::ATOMUMIN32:
12406 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVB32rr);
12407 case X86::ATOMUMAX32:
12408 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVA32rr);
12410 case X86::ATOMAND16:
12411 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND16rr,
12412 X86::AND16ri, X86::MOV16rm,
12414 X86::NOT16r, X86::AX,
12415 X86::GR16RegisterClass);
12416 case X86::ATOMOR16:
12417 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::OR16rr,
12418 X86::OR16ri, X86::MOV16rm,
12420 X86::NOT16r, X86::AX,
12421 X86::GR16RegisterClass);
12422 case X86::ATOMXOR16:
12423 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::XOR16rr,
12424 X86::XOR16ri, X86::MOV16rm,
12426 X86::NOT16r, X86::AX,
12427 X86::GR16RegisterClass);
12428 case X86::ATOMNAND16:
12429 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND16rr,
12430 X86::AND16ri, X86::MOV16rm,
12432 X86::NOT16r, X86::AX,
12433 X86::GR16RegisterClass, true);
12434 case X86::ATOMMIN16:
12435 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVL16rr);
12436 case X86::ATOMMAX16:
12437 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVG16rr);
12438 case X86::ATOMUMIN16:
12439 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVB16rr);
12440 case X86::ATOMUMAX16:
12441 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVA16rr);
12443 case X86::ATOMAND8:
12444 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND8rr,
12445 X86::AND8ri, X86::MOV8rm,
12447 X86::NOT8r, X86::AL,
12448 X86::GR8RegisterClass);
12450 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::OR8rr,
12451 X86::OR8ri, X86::MOV8rm,
12453 X86::NOT8r, X86::AL,
12454 X86::GR8RegisterClass);
12455 case X86::ATOMXOR8:
12456 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::XOR8rr,
12457 X86::XOR8ri, X86::MOV8rm,
12459 X86::NOT8r, X86::AL,
12460 X86::GR8RegisterClass);
12461 case X86::ATOMNAND8:
12462 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND8rr,
12463 X86::AND8ri, X86::MOV8rm,
12465 X86::NOT8r, X86::AL,
12466 X86::GR8RegisterClass, true);
12467 // FIXME: There are no CMOV8 instructions; MIN/MAX need some other way.
12468 // This group is for 64-bit host.
12469 case X86::ATOMAND64:
12470 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND64rr,
12471 X86::AND64ri32, X86::MOV64rm,
12473 X86::NOT64r, X86::RAX,
12474 X86::GR64RegisterClass);
12475 case X86::ATOMOR64:
12476 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::OR64rr,
12477 X86::OR64ri32, X86::MOV64rm,
12479 X86::NOT64r, X86::RAX,
12480 X86::GR64RegisterClass);
12481 case X86::ATOMXOR64:
12482 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::XOR64rr,
12483 X86::XOR64ri32, X86::MOV64rm,
12485 X86::NOT64r, X86::RAX,
12486 X86::GR64RegisterClass);
12487 case X86::ATOMNAND64:
12488 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND64rr,
12489 X86::AND64ri32, X86::MOV64rm,
12491 X86::NOT64r, X86::RAX,
12492 X86::GR64RegisterClass, true);
12493 case X86::ATOMMIN64:
12494 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVL64rr);
12495 case X86::ATOMMAX64:
12496 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVG64rr);
12497 case X86::ATOMUMIN64:
12498 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVB64rr);
12499 case X86::ATOMUMAX64:
12500 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVA64rr);
12502 // This group does 64-bit operations on a 32-bit host.
12503 case X86::ATOMAND6432:
12504 return EmitAtomicBit6432WithCustomInserter(MI, BB,
12505 X86::AND32rr, X86::AND32rr,
12506 X86::AND32ri, X86::AND32ri,
12508 case X86::ATOMOR6432:
12509 return EmitAtomicBit6432WithCustomInserter(MI, BB,
12510 X86::OR32rr, X86::OR32rr,
12511 X86::OR32ri, X86::OR32ri,
12513 case X86::ATOMXOR6432:
12514 return EmitAtomicBit6432WithCustomInserter(MI, BB,
12515 X86::XOR32rr, X86::XOR32rr,
12516 X86::XOR32ri, X86::XOR32ri,
12518 case X86::ATOMNAND6432:
12519 return EmitAtomicBit6432WithCustomInserter(MI, BB,
12520 X86::AND32rr, X86::AND32rr,
12521 X86::AND32ri, X86::AND32ri,
12523 case X86::ATOMADD6432:
12524 return EmitAtomicBit6432WithCustomInserter(MI, BB,
12525 X86::ADD32rr, X86::ADC32rr,
12526 X86::ADD32ri, X86::ADC32ri,
12528 case X86::ATOMSUB6432:
12529 return EmitAtomicBit6432WithCustomInserter(MI, BB,
12530 X86::SUB32rr, X86::SBB32rr,
12531 X86::SUB32ri, X86::SBB32ri,
12533 case X86::ATOMSWAP6432:
12534 return EmitAtomicBit6432WithCustomInserter(MI, BB,
12535 X86::MOV32rr, X86::MOV32rr,
12536 X86::MOV32ri, X86::MOV32ri,
12538 case X86::VASTART_SAVE_XMM_REGS:
12539 return EmitVAStartSaveXMMRegsWithCustomInserter(MI, BB);
12541 case X86::VAARG_64:
12542 return EmitVAARG64WithCustomInserter(MI, BB);
12546 //===----------------------------------------------------------------------===//
12547 // X86 Optimization Hooks
12548 //===----------------------------------------------------------------------===//
12550 void X86TargetLowering::computeMaskedBitsForTargetNode(const SDValue Op,
12554 const SelectionDAG &DAG,
12555 unsigned Depth) const {
12556 unsigned Opc = Op.getOpcode();
12557 assert((Opc >= ISD::BUILTIN_OP_END ||
12558 Opc == ISD::INTRINSIC_WO_CHAIN ||
12559 Opc == ISD::INTRINSIC_W_CHAIN ||
12560 Opc == ISD::INTRINSIC_VOID) &&
12561 "Should use MaskedValueIsZero if you don't know whether Op"
12562 " is a target node!");
12564 KnownZero = KnownOne = APInt(Mask.getBitWidth(), 0); // Don't know anything.
12578 // These nodes' second result is a boolean.
12579 if (Op.getResNo() == 0)
12582 case X86ISD::SETCC:
12583 KnownZero |= APInt::getHighBitsSet(Mask.getBitWidth(),
12584 Mask.getBitWidth() - 1);
12586 case ISD::INTRINSIC_WO_CHAIN: {
12587 unsigned IntId = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
12588 unsigned NumLoBits = 0;
12591 case Intrinsic::x86_sse_movmsk_ps:
12592 case Intrinsic::x86_avx_movmsk_ps_256:
12593 case Intrinsic::x86_sse2_movmsk_pd:
12594 case Intrinsic::x86_avx_movmsk_pd_256:
12595 case Intrinsic::x86_mmx_pmovmskb:
12596 case Intrinsic::x86_sse2_pmovmskb_128:
12597 case Intrinsic::x86_avx2_pmovmskb: {
12598 // High bits of movmskp{s|d}, pmovmskb are known zero.
12600 case Intrinsic::x86_sse_movmsk_ps: NumLoBits = 4; break;
12601 case Intrinsic::x86_avx_movmsk_ps_256: NumLoBits = 8; break;
12602 case Intrinsic::x86_sse2_movmsk_pd: NumLoBits = 2; break;
12603 case Intrinsic::x86_avx_movmsk_pd_256: NumLoBits = 4; break;
12604 case Intrinsic::x86_mmx_pmovmskb: NumLoBits = 8; break;
12605 case Intrinsic::x86_sse2_pmovmskb_128: NumLoBits = 16; break;
12606 case Intrinsic::x86_avx2_pmovmskb: NumLoBits = 32; break;
12608 KnownZero = APInt::getHighBitsSet(Mask.getBitWidth(),
12609 Mask.getBitWidth() - NumLoBits);
12618 unsigned X86TargetLowering::ComputeNumSignBitsForTargetNode(SDValue Op,
12619 unsigned Depth) const {
12620 // SETCC_CARRY sets the dest to ~0 for true or 0 for false.
12621 if (Op.getOpcode() == X86ISD::SETCC_CARRY)
12622 return Op.getValueType().getScalarType().getSizeInBits();
12628 /// isGAPlusOffset - Returns true (and the GlobalValue and the offset) if the
12629 /// node is a GlobalAddress + offset.
12630 bool X86TargetLowering::isGAPlusOffset(SDNode *N,
12631 const GlobalValue* &GA,
12632 int64_t &Offset) const {
12633 if (N->getOpcode() == X86ISD::Wrapper) {
12634 if (isa<GlobalAddressSDNode>(N->getOperand(0))) {
12635 GA = cast<GlobalAddressSDNode>(N->getOperand(0))->getGlobal();
12636 Offset = cast<GlobalAddressSDNode>(N->getOperand(0))->getOffset();
12640 return TargetLowering::isGAPlusOffset(N, GA, Offset);
12643 /// isShuffleHigh128VectorInsertLow - Checks whether the shuffle node is the
12644 /// same as extracting the high 128-bit part of 256-bit vector and then
12645 /// inserting the result into the low part of a new 256-bit vector
12646 static bool isShuffleHigh128VectorInsertLow(ShuffleVectorSDNode *SVOp) {
12647 EVT VT = SVOp->getValueType(0);
12648 int NumElems = VT.getVectorNumElements();
12650 // vector_shuffle <4, 5, 6, 7, u, u, u, u> or <2, 3, u, u>
12651 for (int i = 0, j = NumElems/2; i < NumElems/2; ++i, ++j)
12652 if (!isUndefOrEqual(SVOp->getMaskElt(i), j) ||
12653 SVOp->getMaskElt(j) >= 0)
12659 /// isShuffleLow128VectorInsertHigh - Checks whether the shuffle node is the
12660 /// same as extracting the low 128-bit part of 256-bit vector and then
12661 /// inserting the result into the high part of a new 256-bit vector
12662 static bool isShuffleLow128VectorInsertHigh(ShuffleVectorSDNode *SVOp) {
12663 EVT VT = SVOp->getValueType(0);
12664 int NumElems = VT.getVectorNumElements();
12666 // vector_shuffle <u, u, u, u, 0, 1, 2, 3> or <u, u, 0, 1>
12667 for (int i = NumElems/2, j = 0; i < NumElems; ++i, ++j)
12668 if (!isUndefOrEqual(SVOp->getMaskElt(i), j) ||
12669 SVOp->getMaskElt(j) >= 0)
12675 /// PerformShuffleCombine256 - Performs shuffle combines for 256-bit vectors.
12676 static SDValue PerformShuffleCombine256(SDNode *N, SelectionDAG &DAG,
12677 TargetLowering::DAGCombinerInfo &DCI,
12679 DebugLoc dl = N->getDebugLoc();
12680 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);
12681 SDValue V1 = SVOp->getOperand(0);
12682 SDValue V2 = SVOp->getOperand(1);
12683 EVT VT = SVOp->getValueType(0);
12684 int NumElems = VT.getVectorNumElements();
12686 if (V1.getOpcode() == ISD::CONCAT_VECTORS &&
12687 V2.getOpcode() == ISD::CONCAT_VECTORS) {
12691 // V UNDEF BUILD_VECTOR UNDEF
12693 // CONCAT_VECTOR CONCAT_VECTOR
12696 // RESULT: V + zero extended
12698 if (V2.getOperand(0).getOpcode() != ISD::BUILD_VECTOR ||
12699 V2.getOperand(1).getOpcode() != ISD::UNDEF ||
12700 V1.getOperand(1).getOpcode() != ISD::UNDEF)
12703 if (!ISD::isBuildVectorAllZeros(V2.getOperand(0).getNode()))
12706 // To match the shuffle mask, the first half of the mask should
12707 // be exactly the first vector, and all the rest a splat with the
12708 // first element of the second one.
12709 for (int i = 0; i < NumElems/2; ++i)
12710 if (!isUndefOrEqual(SVOp->getMaskElt(i), i) ||
12711 !isUndefOrEqual(SVOp->getMaskElt(i+NumElems/2), NumElems))
12714 // If V1 is coming from a vector load then just fold to a VZEXT_LOAD.
12715 if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(V1.getOperand(0))) {
12716 SDVTList Tys = DAG.getVTList(MVT::v4i64, MVT::Other);
12717 SDValue Ops[] = { Ld->getChain(), Ld->getBasePtr() };
12719 DAG.getMemIntrinsicNode(X86ISD::VZEXT_LOAD, dl, Tys, Ops, 2,
12721 Ld->getPointerInfo(),
12722 Ld->getAlignment(),
12723 false/*isVolatile*/, true/*ReadMem*/,
12724 false/*WriteMem*/);
12725 return DAG.getNode(ISD::BITCAST, dl, VT, ResNode);
12728 // Emit a zeroed vector and insert the desired subvector on its
12730 SDValue Zeros = getZeroVector(VT, true /* HasSSE2 */, HasAVX2, DAG, dl);
12731 SDValue InsV = Insert128BitVector(Zeros, V1.getOperand(0),
12732 DAG.getConstant(0, MVT::i32), DAG, dl);
12733 return DCI.CombineTo(N, InsV);
12736 //===--------------------------------------------------------------------===//
12737 // Combine some shuffles into subvector extracts and inserts:
12740 // vector_shuffle <4, 5, 6, 7, u, u, u, u> or <2, 3, u, u>
12741 if (isShuffleHigh128VectorInsertLow(SVOp)) {
12742 SDValue V = Extract128BitVector(V1, DAG.getConstant(NumElems/2, MVT::i32),
12744 SDValue InsV = Insert128BitVector(DAG.getNode(ISD::UNDEF, dl, VT),
12745 V, DAG.getConstant(0, MVT::i32), DAG, dl);
12746 return DCI.CombineTo(N, InsV);
12749 // vector_shuffle <u, u, u, u, 0, 1, 2, 3> or <u, u, 0, 1>
12750 if (isShuffleLow128VectorInsertHigh(SVOp)) {
12751 SDValue V = Extract128BitVector(V1, DAG.getConstant(0, MVT::i32), DAG, dl);
12752 SDValue InsV = Insert128BitVector(DAG.getNode(ISD::UNDEF, dl, VT),
12753 V, DAG.getConstant(NumElems/2, MVT::i32), DAG, dl);
12754 return DCI.CombineTo(N, InsV);
12760 /// PerformShuffleCombine - Performs several different shuffle combines.
12761 static SDValue PerformShuffleCombine(SDNode *N, SelectionDAG &DAG,
12762 TargetLowering::DAGCombinerInfo &DCI,
12763 const X86Subtarget *Subtarget) {
12764 DebugLoc dl = N->getDebugLoc();
12765 EVT VT = N->getValueType(0);
12767 // Don't create instructions with illegal types after legalize types has run.
12768 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
12769 if (!DCI.isBeforeLegalize() && !TLI.isTypeLegal(VT.getVectorElementType()))
12772 // Combine 256-bit vector shuffles. This is only profitable when in AVX mode
12773 if (Subtarget->hasAVX() && VT.getSizeInBits() == 256 &&
12774 N->getOpcode() == ISD::VECTOR_SHUFFLE)
12775 return PerformShuffleCombine256(N, DAG, DCI, Subtarget->hasAVX2());
12777 // Only handle 128 wide vector from here on.
12778 if (VT.getSizeInBits() != 128)
12781 // Combine a vector_shuffle that is equal to build_vector load1, load2, load3,
12782 // load4, <0, 1, 2, 3> into a 128-bit load if the load addresses are
12783 // consecutive, non-overlapping, and in the right order.
12784 SmallVector<SDValue, 16> Elts;
12785 for (unsigned i = 0, e = VT.getVectorNumElements(); i != e; ++i)
12786 Elts.push_back(getShuffleScalarElt(N, i, DAG, 0));
12788 return EltsFromConsecutiveLoads(VT, Elts, dl, DAG);
12791 /// PerformEXTRACT_VECTOR_ELTCombine - Detect vector gather/scatter index
12792 /// generation and convert it from being a bunch of shuffles and extracts
12793 /// to a simple store and scalar loads to extract the elements.
12794 static SDValue PerformEXTRACT_VECTOR_ELTCombine(SDNode *N, SelectionDAG &DAG,
12795 const TargetLowering &TLI) {
12796 SDValue InputVector = N->getOperand(0);
12798 // Only operate on vectors of 4 elements, where the alternative shuffling
12799 // gets to be more expensive.
12800 if (InputVector.getValueType() != MVT::v4i32)
12803 // Check whether every use of InputVector is an EXTRACT_VECTOR_ELT with a
12804 // single use which is a sign-extend or zero-extend, and all elements are
12806 SmallVector<SDNode *, 4> Uses;
12807 unsigned ExtractedElements = 0;
12808 for (SDNode::use_iterator UI = InputVector.getNode()->use_begin(),
12809 UE = InputVector.getNode()->use_end(); UI != UE; ++UI) {
12810 if (UI.getUse().getResNo() != InputVector.getResNo())
12813 SDNode *Extract = *UI;
12814 if (Extract->getOpcode() != ISD::EXTRACT_VECTOR_ELT)
12817 if (Extract->getValueType(0) != MVT::i32)
12819 if (!Extract->hasOneUse())
12821 if (Extract->use_begin()->getOpcode() != ISD::SIGN_EXTEND &&
12822 Extract->use_begin()->getOpcode() != ISD::ZERO_EXTEND)
12824 if (!isa<ConstantSDNode>(Extract->getOperand(1)))
12827 // Record which element was extracted.
12828 ExtractedElements |=
12829 1 << cast<ConstantSDNode>(Extract->getOperand(1))->getZExtValue();
12831 Uses.push_back(Extract);
12834 // If not all the elements were used, this may not be worthwhile.
12835 if (ExtractedElements != 15)
12838 // Ok, we've now decided to do the transformation.
12839 DebugLoc dl = InputVector.getDebugLoc();
12841 // Store the value to a temporary stack slot.
12842 SDValue StackPtr = DAG.CreateStackTemporary(InputVector.getValueType());
12843 SDValue Ch = DAG.getStore(DAG.getEntryNode(), dl, InputVector, StackPtr,
12844 MachinePointerInfo(), false, false, 0);
12846 // Replace each use (extract) with a load of the appropriate element.
12847 for (SmallVectorImpl<SDNode *>::iterator UI = Uses.begin(),
12848 UE = Uses.end(); UI != UE; ++UI) {
12849 SDNode *Extract = *UI;
12851 // cOMpute the element's address.
12852 SDValue Idx = Extract->getOperand(1);
12854 InputVector.getValueType().getVectorElementType().getSizeInBits()/8;
12855 uint64_t Offset = EltSize * cast<ConstantSDNode>(Idx)->getZExtValue();
12856 SDValue OffsetVal = DAG.getConstant(Offset, TLI.getPointerTy());
12858 SDValue ScalarAddr = DAG.getNode(ISD::ADD, dl, TLI.getPointerTy(),
12859 StackPtr, OffsetVal);
12861 // Load the scalar.
12862 SDValue LoadScalar = DAG.getLoad(Extract->getValueType(0), dl, Ch,
12863 ScalarAddr, MachinePointerInfo(),
12864 false, false, false, 0);
12866 // Replace the exact with the load.
12867 DAG.ReplaceAllUsesOfValueWith(SDValue(Extract, 0), LoadScalar);
12870 // The replacement was made in place; don't return anything.
12874 /// PerformSELECTCombine - Do target-specific dag combines on SELECT and VSELECT
12876 static SDValue PerformSELECTCombine(SDNode *N, SelectionDAG &DAG,
12877 TargetLowering::DAGCombinerInfo &DCI,
12878 const X86Subtarget *Subtarget) {
12879 DebugLoc DL = N->getDebugLoc();
12880 SDValue Cond = N->getOperand(0);
12881 // Get the LHS/RHS of the select.
12882 SDValue LHS = N->getOperand(1);
12883 SDValue RHS = N->getOperand(2);
12884 EVT VT = LHS.getValueType();
12886 // If we have SSE[12] support, try to form min/max nodes. SSE min/max
12887 // instructions match the semantics of the common C idiom x<y?x:y but not
12888 // x<=y?x:y, because of how they handle negative zero (which can be
12889 // ignored in unsafe-math mode).
12890 if (Cond.getOpcode() == ISD::SETCC && VT.isFloatingPoint() &&
12891 VT != MVT::f80 && DAG.getTargetLoweringInfo().isTypeLegal(VT) &&
12892 (Subtarget->hasSSE2() ||
12893 (Subtarget->hasSSE1() && VT.getScalarType() == MVT::f32))) {
12894 ISD::CondCode CC = cast<CondCodeSDNode>(Cond.getOperand(2))->get();
12896 unsigned Opcode = 0;
12897 // Check for x CC y ? x : y.
12898 if (DAG.isEqualTo(LHS, Cond.getOperand(0)) &&
12899 DAG.isEqualTo(RHS, Cond.getOperand(1))) {
12903 // Converting this to a min would handle NaNs incorrectly, and swapping
12904 // the operands would cause it to handle comparisons between positive
12905 // and negative zero incorrectly.
12906 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS)) {
12907 if (!DAG.getTarget().Options.UnsafeFPMath &&
12908 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS)))
12910 std::swap(LHS, RHS);
12912 Opcode = X86ISD::FMIN;
12915 // Converting this to a min would handle comparisons between positive
12916 // and negative zero incorrectly.
12917 if (!DAG.getTarget().Options.UnsafeFPMath &&
12918 !DAG.isKnownNeverZero(LHS) && !DAG.isKnownNeverZero(RHS))
12920 Opcode = X86ISD::FMIN;
12923 // Converting this to a min would handle both negative zeros and NaNs
12924 // incorrectly, but we can swap the operands to fix both.
12925 std::swap(LHS, RHS);
12929 Opcode = X86ISD::FMIN;
12933 // Converting this to a max would handle comparisons between positive
12934 // and negative zero incorrectly.
12935 if (!DAG.getTarget().Options.UnsafeFPMath &&
12936 !DAG.isKnownNeverZero(LHS) && !DAG.isKnownNeverZero(RHS))
12938 Opcode = X86ISD::FMAX;
12941 // Converting this to a max would handle NaNs incorrectly, and swapping
12942 // the operands would cause it to handle comparisons between positive
12943 // and negative zero incorrectly.
12944 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS)) {
12945 if (!DAG.getTarget().Options.UnsafeFPMath &&
12946 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS)))
12948 std::swap(LHS, RHS);
12950 Opcode = X86ISD::FMAX;
12953 // Converting this to a max would handle both negative zeros and NaNs
12954 // incorrectly, but we can swap the operands to fix both.
12955 std::swap(LHS, RHS);
12959 Opcode = X86ISD::FMAX;
12962 // Check for x CC y ? y : x -- a min/max with reversed arms.
12963 } else if (DAG.isEqualTo(LHS, Cond.getOperand(1)) &&
12964 DAG.isEqualTo(RHS, Cond.getOperand(0))) {
12968 // Converting this to a min would handle comparisons between positive
12969 // and negative zero incorrectly, and swapping the operands would
12970 // cause it to handle NaNs incorrectly.
12971 if (!DAG.getTarget().Options.UnsafeFPMath &&
12972 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS))) {
12973 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS))
12975 std::swap(LHS, RHS);
12977 Opcode = X86ISD::FMIN;
12980 // Converting this to a min would handle NaNs incorrectly.
12981 if (!DAG.getTarget().Options.UnsafeFPMath &&
12982 (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS)))
12984 Opcode = X86ISD::FMIN;
12987 // Converting this to a min would handle both negative zeros and NaNs
12988 // incorrectly, but we can swap the operands to fix both.
12989 std::swap(LHS, RHS);
12993 Opcode = X86ISD::FMIN;
12997 // Converting this to a max would handle NaNs incorrectly.
12998 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS))
13000 Opcode = X86ISD::FMAX;
13003 // Converting this to a max would handle comparisons between positive
13004 // and negative zero incorrectly, and swapping the operands would
13005 // cause it to handle NaNs incorrectly.
13006 if (!DAG.getTarget().Options.UnsafeFPMath &&
13007 !DAG.isKnownNeverZero(LHS) && !DAG.isKnownNeverZero(RHS)) {
13008 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS))
13010 std::swap(LHS, RHS);
13012 Opcode = X86ISD::FMAX;
13015 // Converting this to a max would handle both negative zeros and NaNs
13016 // incorrectly, but we can swap the operands to fix both.
13017 std::swap(LHS, RHS);
13021 Opcode = X86ISD::FMAX;
13027 return DAG.getNode(Opcode, DL, N->getValueType(0), LHS, RHS);
13030 // If this is a select between two integer constants, try to do some
13032 if (ConstantSDNode *TrueC = dyn_cast<ConstantSDNode>(LHS)) {
13033 if (ConstantSDNode *FalseC = dyn_cast<ConstantSDNode>(RHS))
13034 // Don't do this for crazy integer types.
13035 if (DAG.getTargetLoweringInfo().isTypeLegal(LHS.getValueType())) {
13036 // If this is efficiently invertible, canonicalize the LHSC/RHSC values
13037 // so that TrueC (the true value) is larger than FalseC.
13038 bool NeedsCondInvert = false;
13040 if (TrueC->getAPIntValue().ult(FalseC->getAPIntValue()) &&
13041 // Efficiently invertible.
13042 (Cond.getOpcode() == ISD::SETCC || // setcc -> invertible.
13043 (Cond.getOpcode() == ISD::XOR && // xor(X, C) -> invertible.
13044 isa<ConstantSDNode>(Cond.getOperand(1))))) {
13045 NeedsCondInvert = true;
13046 std::swap(TrueC, FalseC);
13049 // Optimize C ? 8 : 0 -> zext(C) << 3. Likewise for any pow2/0.
13050 if (FalseC->getAPIntValue() == 0 &&
13051 TrueC->getAPIntValue().isPowerOf2()) {
13052 if (NeedsCondInvert) // Invert the condition if needed.
13053 Cond = DAG.getNode(ISD::XOR, DL, Cond.getValueType(), Cond,
13054 DAG.getConstant(1, Cond.getValueType()));
13056 // Zero extend the condition if needed.
13057 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, LHS.getValueType(), Cond);
13059 unsigned ShAmt = TrueC->getAPIntValue().logBase2();
13060 return DAG.getNode(ISD::SHL, DL, LHS.getValueType(), Cond,
13061 DAG.getConstant(ShAmt, MVT::i8));
13064 // Optimize Cond ? cst+1 : cst -> zext(setcc(C)+cst.
13065 if (FalseC->getAPIntValue()+1 == TrueC->getAPIntValue()) {
13066 if (NeedsCondInvert) // Invert the condition if needed.
13067 Cond = DAG.getNode(ISD::XOR, DL, Cond.getValueType(), Cond,
13068 DAG.getConstant(1, Cond.getValueType()));
13070 // Zero extend the condition if needed.
13071 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL,
13072 FalseC->getValueType(0), Cond);
13073 return DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond,
13074 SDValue(FalseC, 0));
13077 // Optimize cases that will turn into an LEA instruction. This requires
13078 // an i32 or i64 and an efficient multiplier (1, 2, 3, 4, 5, 8, 9).
13079 if (N->getValueType(0) == MVT::i32 || N->getValueType(0) == MVT::i64) {
13080 uint64_t Diff = TrueC->getZExtValue()-FalseC->getZExtValue();
13081 if (N->getValueType(0) == MVT::i32) Diff = (unsigned)Diff;
13083 bool isFastMultiplier = false;
13085 switch ((unsigned char)Diff) {
13087 case 1: // result = add base, cond
13088 case 2: // result = lea base( , cond*2)
13089 case 3: // result = lea base(cond, cond*2)
13090 case 4: // result = lea base( , cond*4)
13091 case 5: // result = lea base(cond, cond*4)
13092 case 8: // result = lea base( , cond*8)
13093 case 9: // result = lea base(cond, cond*8)
13094 isFastMultiplier = true;
13099 if (isFastMultiplier) {
13100 APInt Diff = TrueC->getAPIntValue()-FalseC->getAPIntValue();
13101 if (NeedsCondInvert) // Invert the condition if needed.
13102 Cond = DAG.getNode(ISD::XOR, DL, Cond.getValueType(), Cond,
13103 DAG.getConstant(1, Cond.getValueType()));
13105 // Zero extend the condition if needed.
13106 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, FalseC->getValueType(0),
13108 // Scale the condition by the difference.
13110 Cond = DAG.getNode(ISD::MUL, DL, Cond.getValueType(), Cond,
13111 DAG.getConstant(Diff, Cond.getValueType()));
13113 // Add the base if non-zero.
13114 if (FalseC->getAPIntValue() != 0)
13115 Cond = DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond,
13116 SDValue(FalseC, 0));
13123 // Canonicalize max and min:
13124 // (x > y) ? x : y -> (x >= y) ? x : y
13125 // (x < y) ? x : y -> (x <= y) ? x : y
13126 // This allows use of COND_S / COND_NS (see TranslateX86CC) which eliminates
13127 // the need for an extra compare
13128 // against zero. e.g.
13129 // (x - y) > 0 : (x - y) ? 0 -> (x - y) >= 0 : (x - y) ? 0
13131 // testl %edi, %edi
13133 // cmovgl %edi, %eax
13137 // cmovsl %eax, %edi
13138 if (N->getOpcode() == ISD::SELECT && Cond.getOpcode() == ISD::SETCC &&
13139 DAG.isEqualTo(LHS, Cond.getOperand(0)) &&
13140 DAG.isEqualTo(RHS, Cond.getOperand(1))) {
13141 ISD::CondCode CC = cast<CondCodeSDNode>(Cond.getOperand(2))->get();
13146 ISD::CondCode NewCC = (CC == ISD::SETLT) ? ISD::SETLE : ISD::SETGE;
13147 Cond = DAG.getSetCC(Cond.getDebugLoc(), Cond.getValueType(),
13148 Cond.getOperand(0), Cond.getOperand(1), NewCC);
13149 return DAG.getNode(ISD::SELECT, DL, VT, Cond, LHS, RHS);
13154 // If we know that this node is legal then we know that it is going to be
13155 // matched by one of the SSE/AVX BLEND instructions. These instructions only
13156 // depend on the highest bit in each word. Try to use SimplifyDemandedBits
13157 // to simplify previous instructions.
13158 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
13159 if (N->getOpcode() == ISD::VSELECT && DCI.isBeforeLegalizeOps() &&
13160 !DCI.isBeforeLegalize() &&
13161 TLI.isOperationLegal(ISD::VSELECT, VT)) {
13162 unsigned BitWidth = Cond.getValueType().getScalarType().getSizeInBits();
13163 assert(BitWidth >= 8 && BitWidth <= 64 && "Invalid mask size");
13164 APInt DemandedMask = APInt::getHighBitsSet(BitWidth, 1);
13166 APInt KnownZero, KnownOne;
13167 TargetLowering::TargetLoweringOpt TLO(DAG, DCI.isBeforeLegalize(),
13168 DCI.isBeforeLegalizeOps());
13169 if (TLO.ShrinkDemandedConstant(Cond, DemandedMask) ||
13170 TLI.SimplifyDemandedBits(Cond, DemandedMask, KnownZero, KnownOne, TLO))
13171 DCI.CommitTargetLoweringOpt(TLO);
13177 /// Optimize X86ISD::CMOV [LHS, RHS, CONDCODE (e.g. X86::COND_NE), CONDVAL]
13178 static SDValue PerformCMOVCombine(SDNode *N, SelectionDAG &DAG,
13179 TargetLowering::DAGCombinerInfo &DCI) {
13180 DebugLoc DL = N->getDebugLoc();
13182 // If the flag operand isn't dead, don't touch this CMOV.
13183 if (N->getNumValues() == 2 && !SDValue(N, 1).use_empty())
13186 SDValue FalseOp = N->getOperand(0);
13187 SDValue TrueOp = N->getOperand(1);
13188 X86::CondCode CC = (X86::CondCode)N->getConstantOperandVal(2);
13189 SDValue Cond = N->getOperand(3);
13190 if (CC == X86::COND_E || CC == X86::COND_NE) {
13191 switch (Cond.getOpcode()) {
13195 // If operand of BSR / BSF are proven never zero, then ZF cannot be set.
13196 if (DAG.isKnownNeverZero(Cond.getOperand(0)))
13197 return (CC == X86::COND_E) ? FalseOp : TrueOp;
13201 // If this is a select between two integer constants, try to do some
13202 // optimizations. Note that the operands are ordered the opposite of SELECT
13204 if (ConstantSDNode *TrueC = dyn_cast<ConstantSDNode>(TrueOp)) {
13205 if (ConstantSDNode *FalseC = dyn_cast<ConstantSDNode>(FalseOp)) {
13206 // Canonicalize the TrueC/FalseC values so that TrueC (the true value) is
13207 // larger than FalseC (the false value).
13208 if (TrueC->getAPIntValue().ult(FalseC->getAPIntValue())) {
13209 CC = X86::GetOppositeBranchCondition(CC);
13210 std::swap(TrueC, FalseC);
13213 // Optimize C ? 8 : 0 -> zext(setcc(C)) << 3. Likewise for any pow2/0.
13214 // This is efficient for any integer data type (including i8/i16) and
13216 if (FalseC->getAPIntValue() == 0 && TrueC->getAPIntValue().isPowerOf2()) {
13217 Cond = DAG.getNode(X86ISD::SETCC, DL, MVT::i8,
13218 DAG.getConstant(CC, MVT::i8), Cond);
13220 // Zero extend the condition if needed.
13221 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, TrueC->getValueType(0), Cond);
13223 unsigned ShAmt = TrueC->getAPIntValue().logBase2();
13224 Cond = DAG.getNode(ISD::SHL, DL, Cond.getValueType(), Cond,
13225 DAG.getConstant(ShAmt, MVT::i8));
13226 if (N->getNumValues() == 2) // Dead flag value?
13227 return DCI.CombineTo(N, Cond, SDValue());
13231 // Optimize Cond ? cst+1 : cst -> zext(setcc(C)+cst. This is efficient
13232 // for any integer data type, including i8/i16.
13233 if (FalseC->getAPIntValue()+1 == TrueC->getAPIntValue()) {
13234 Cond = DAG.getNode(X86ISD::SETCC, DL, MVT::i8,
13235 DAG.getConstant(CC, MVT::i8), Cond);
13237 // Zero extend the condition if needed.
13238 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL,
13239 FalseC->getValueType(0), Cond);
13240 Cond = DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond,
13241 SDValue(FalseC, 0));
13243 if (N->getNumValues() == 2) // Dead flag value?
13244 return DCI.CombineTo(N, Cond, SDValue());
13248 // Optimize cases that will turn into an LEA instruction. This requires
13249 // an i32 or i64 and an efficient multiplier (1, 2, 3, 4, 5, 8, 9).
13250 if (N->getValueType(0) == MVT::i32 || N->getValueType(0) == MVT::i64) {
13251 uint64_t Diff = TrueC->getZExtValue()-FalseC->getZExtValue();
13252 if (N->getValueType(0) == MVT::i32) Diff = (unsigned)Diff;
13254 bool isFastMultiplier = false;
13256 switch ((unsigned char)Diff) {
13258 case 1: // result = add base, cond
13259 case 2: // result = lea base( , cond*2)
13260 case 3: // result = lea base(cond, cond*2)
13261 case 4: // result = lea base( , cond*4)
13262 case 5: // result = lea base(cond, cond*4)
13263 case 8: // result = lea base( , cond*8)
13264 case 9: // result = lea base(cond, cond*8)
13265 isFastMultiplier = true;
13270 if (isFastMultiplier) {
13271 APInt Diff = TrueC->getAPIntValue()-FalseC->getAPIntValue();
13272 Cond = DAG.getNode(X86ISD::SETCC, DL, MVT::i8,
13273 DAG.getConstant(CC, MVT::i8), Cond);
13274 // Zero extend the condition if needed.
13275 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, FalseC->getValueType(0),
13277 // Scale the condition by the difference.
13279 Cond = DAG.getNode(ISD::MUL, DL, Cond.getValueType(), Cond,
13280 DAG.getConstant(Diff, Cond.getValueType()));
13282 // Add the base if non-zero.
13283 if (FalseC->getAPIntValue() != 0)
13284 Cond = DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond,
13285 SDValue(FalseC, 0));
13286 if (N->getNumValues() == 2) // Dead flag value?
13287 return DCI.CombineTo(N, Cond, SDValue());
13297 /// PerformMulCombine - Optimize a single multiply with constant into two
13298 /// in order to implement it with two cheaper instructions, e.g.
13299 /// LEA + SHL, LEA + LEA.
13300 static SDValue PerformMulCombine(SDNode *N, SelectionDAG &DAG,
13301 TargetLowering::DAGCombinerInfo &DCI) {
13302 if (DCI.isBeforeLegalize() || DCI.isCalledByLegalizer())
13305 EVT VT = N->getValueType(0);
13306 if (VT != MVT::i64)
13309 ConstantSDNode *C = dyn_cast<ConstantSDNode>(N->getOperand(1));
13312 uint64_t MulAmt = C->getZExtValue();
13313 if (isPowerOf2_64(MulAmt) || MulAmt == 3 || MulAmt == 5 || MulAmt == 9)
13316 uint64_t MulAmt1 = 0;
13317 uint64_t MulAmt2 = 0;
13318 if ((MulAmt % 9) == 0) {
13320 MulAmt2 = MulAmt / 9;
13321 } else if ((MulAmt % 5) == 0) {
13323 MulAmt2 = MulAmt / 5;
13324 } else if ((MulAmt % 3) == 0) {
13326 MulAmt2 = MulAmt / 3;
13329 (isPowerOf2_64(MulAmt2) || MulAmt2 == 3 || MulAmt2 == 5 || MulAmt2 == 9)){
13330 DebugLoc DL = N->getDebugLoc();
13332 if (isPowerOf2_64(MulAmt2) &&
13333 !(N->hasOneUse() && N->use_begin()->getOpcode() == ISD::ADD))
13334 // If second multiplifer is pow2, issue it first. We want the multiply by
13335 // 3, 5, or 9 to be folded into the addressing mode unless the lone use
13337 std::swap(MulAmt1, MulAmt2);
13340 if (isPowerOf2_64(MulAmt1))
13341 NewMul = DAG.getNode(ISD::SHL, DL, VT, N->getOperand(0),
13342 DAG.getConstant(Log2_64(MulAmt1), MVT::i8));
13344 NewMul = DAG.getNode(X86ISD::MUL_IMM, DL, VT, N->getOperand(0),
13345 DAG.getConstant(MulAmt1, VT));
13347 if (isPowerOf2_64(MulAmt2))
13348 NewMul = DAG.getNode(ISD::SHL, DL, VT, NewMul,
13349 DAG.getConstant(Log2_64(MulAmt2), MVT::i8));
13351 NewMul = DAG.getNode(X86ISD::MUL_IMM, DL, VT, NewMul,
13352 DAG.getConstant(MulAmt2, VT));
13354 // Do not add new nodes to DAG combiner worklist.
13355 DCI.CombineTo(N, NewMul, false);
13360 static SDValue PerformSHLCombine(SDNode *N, SelectionDAG &DAG) {
13361 SDValue N0 = N->getOperand(0);
13362 SDValue N1 = N->getOperand(1);
13363 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1);
13364 EVT VT = N0.getValueType();
13366 // fold (shl (and (setcc_c), c1), c2) -> (and setcc_c, (c1 << c2))
13367 // since the result of setcc_c is all zero's or all ones.
13368 if (VT.isInteger() && !VT.isVector() &&
13369 N1C && N0.getOpcode() == ISD::AND &&
13370 N0.getOperand(1).getOpcode() == ISD::Constant) {
13371 SDValue N00 = N0.getOperand(0);
13372 if (N00.getOpcode() == X86ISD::SETCC_CARRY ||
13373 ((N00.getOpcode() == ISD::ANY_EXTEND ||
13374 N00.getOpcode() == ISD::ZERO_EXTEND) &&
13375 N00.getOperand(0).getOpcode() == X86ISD::SETCC_CARRY)) {
13376 APInt Mask = cast<ConstantSDNode>(N0.getOperand(1))->getAPIntValue();
13377 APInt ShAmt = N1C->getAPIntValue();
13378 Mask = Mask.shl(ShAmt);
13380 return DAG.getNode(ISD::AND, N->getDebugLoc(), VT,
13381 N00, DAG.getConstant(Mask, VT));
13386 // Hardware support for vector shifts is sparse which makes us scalarize the
13387 // vector operations in many cases. Also, on sandybridge ADD is faster than
13389 // (shl V, 1) -> add V,V
13390 if (isSplatVector(N1.getNode())) {
13391 assert(N0.getValueType().isVector() && "Invalid vector shift type");
13392 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1->getOperand(0));
13393 // We shift all of the values by one. In many cases we do not have
13394 // hardware support for this operation. This is better expressed as an ADD
13396 if (N1C && (1 == N1C->getZExtValue())) {
13397 return DAG.getNode(ISD::ADD, N->getDebugLoc(), VT, N0, N0);
13404 /// PerformShiftCombine - Transforms vector shift nodes to use vector shifts
13406 static SDValue PerformShiftCombine(SDNode* N, SelectionDAG &DAG,
13407 const X86Subtarget *Subtarget) {
13408 EVT VT = N->getValueType(0);
13409 if (N->getOpcode() == ISD::SHL) {
13410 SDValue V = PerformSHLCombine(N, DAG);
13411 if (V.getNode()) return V;
13414 // On X86 with SSE2 support, we can transform this to a vector shift if
13415 // all elements are shifted by the same amount. We can't do this in legalize
13416 // because the a constant vector is typically transformed to a constant pool
13417 // so we have no knowledge of the shift amount.
13418 if (!Subtarget->hasSSE2())
13421 if (VT != MVT::v2i64 && VT != MVT::v4i32 && VT != MVT::v8i16 &&
13422 (!Subtarget->hasAVX2() ||
13423 (VT != MVT::v4i64 && VT != MVT::v8i32 && VT != MVT::v16i16)))
13426 SDValue ShAmtOp = N->getOperand(1);
13427 EVT EltVT = VT.getVectorElementType();
13428 DebugLoc DL = N->getDebugLoc();
13429 SDValue BaseShAmt = SDValue();
13430 if (ShAmtOp.getOpcode() == ISD::BUILD_VECTOR) {
13431 unsigned NumElts = VT.getVectorNumElements();
13433 for (; i != NumElts; ++i) {
13434 SDValue Arg = ShAmtOp.getOperand(i);
13435 if (Arg.getOpcode() == ISD::UNDEF) continue;
13439 // Handle the case where the build_vector is all undef
13440 // FIXME: Should DAG allow this?
13444 for (; i != NumElts; ++i) {
13445 SDValue Arg = ShAmtOp.getOperand(i);
13446 if (Arg.getOpcode() == ISD::UNDEF) continue;
13447 if (Arg != BaseShAmt) {
13451 } else if (ShAmtOp.getOpcode() == ISD::VECTOR_SHUFFLE &&
13452 cast<ShuffleVectorSDNode>(ShAmtOp)->isSplat()) {
13453 SDValue InVec = ShAmtOp.getOperand(0);
13454 if (InVec.getOpcode() == ISD::BUILD_VECTOR) {
13455 unsigned NumElts = InVec.getValueType().getVectorNumElements();
13457 for (; i != NumElts; ++i) {
13458 SDValue Arg = InVec.getOperand(i);
13459 if (Arg.getOpcode() == ISD::UNDEF) continue;
13463 } else if (InVec.getOpcode() == ISD::INSERT_VECTOR_ELT) {
13464 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(InVec.getOperand(2))) {
13465 unsigned SplatIdx= cast<ShuffleVectorSDNode>(ShAmtOp)->getSplatIndex();
13466 if (C->getZExtValue() == SplatIdx)
13467 BaseShAmt = InVec.getOperand(1);
13470 if (BaseShAmt.getNode() == 0)
13471 BaseShAmt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, EltVT, ShAmtOp,
13472 DAG.getIntPtrConstant(0));
13476 // The shift amount is an i32.
13477 if (EltVT.bitsGT(MVT::i32))
13478 BaseShAmt = DAG.getNode(ISD::TRUNCATE, DL, MVT::i32, BaseShAmt);
13479 else if (EltVT.bitsLT(MVT::i32))
13480 BaseShAmt = DAG.getNode(ISD::ZERO_EXTEND, DL, MVT::i32, BaseShAmt);
13482 // The shift amount is identical so we can do a vector shift.
13483 SDValue ValOp = N->getOperand(0);
13484 switch (N->getOpcode()) {
13486 llvm_unreachable("Unknown shift opcode!");
13489 if (VT == MVT::v2i64)
13490 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
13491 DAG.getConstant(Intrinsic::x86_sse2_pslli_q, MVT::i32),
13493 if (VT == MVT::v4i32)
13494 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
13495 DAG.getConstant(Intrinsic::x86_sse2_pslli_d, MVT::i32),
13497 if (VT == MVT::v8i16)
13498 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
13499 DAG.getConstant(Intrinsic::x86_sse2_pslli_w, MVT::i32),
13501 if (VT == MVT::v4i64)
13502 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
13503 DAG.getConstant(Intrinsic::x86_avx2_pslli_q, MVT::i32),
13505 if (VT == MVT::v8i32)
13506 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
13507 DAG.getConstant(Intrinsic::x86_avx2_pslli_d, MVT::i32),
13509 if (VT == MVT::v16i16)
13510 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
13511 DAG.getConstant(Intrinsic::x86_avx2_pslli_w, MVT::i32),
13515 if (VT == MVT::v4i32)
13516 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
13517 DAG.getConstant(Intrinsic::x86_sse2_psrai_d, MVT::i32),
13519 if (VT == MVT::v8i16)
13520 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
13521 DAG.getConstant(Intrinsic::x86_sse2_psrai_w, MVT::i32),
13523 if (VT == MVT::v8i32)
13524 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
13525 DAG.getConstant(Intrinsic::x86_avx2_psrai_d, MVT::i32),
13527 if (VT == MVT::v16i16)
13528 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
13529 DAG.getConstant(Intrinsic::x86_avx2_psrai_w, MVT::i32),
13533 if (VT == MVT::v2i64)
13534 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
13535 DAG.getConstant(Intrinsic::x86_sse2_psrli_q, MVT::i32),
13537 if (VT == MVT::v4i32)
13538 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
13539 DAG.getConstant(Intrinsic::x86_sse2_psrli_d, MVT::i32),
13541 if (VT == MVT::v8i16)
13542 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
13543 DAG.getConstant(Intrinsic::x86_sse2_psrli_w, MVT::i32),
13545 if (VT == MVT::v4i64)
13546 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
13547 DAG.getConstant(Intrinsic::x86_avx2_psrli_q, MVT::i32),
13549 if (VT == MVT::v8i32)
13550 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
13551 DAG.getConstant(Intrinsic::x86_avx2_psrli_d, MVT::i32),
13553 if (VT == MVT::v16i16)
13554 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
13555 DAG.getConstant(Intrinsic::x86_avx2_psrli_w, MVT::i32),
13563 // CMPEQCombine - Recognize the distinctive (AND (setcc ...) (setcc ..))
13564 // where both setccs reference the same FP CMP, and rewrite for CMPEQSS
13565 // and friends. Likewise for OR -> CMPNEQSS.
13566 static SDValue CMPEQCombine(SDNode *N, SelectionDAG &DAG,
13567 TargetLowering::DAGCombinerInfo &DCI,
13568 const X86Subtarget *Subtarget) {
13571 // SSE1 supports CMP{eq|ne}SS, and SSE2 added CMP{eq|ne}SD, but
13572 // we're requiring SSE2 for both.
13573 if (Subtarget->hasSSE2() && isAndOrOfSetCCs(SDValue(N, 0U), opcode)) {
13574 SDValue N0 = N->getOperand(0);
13575 SDValue N1 = N->getOperand(1);
13576 SDValue CMP0 = N0->getOperand(1);
13577 SDValue CMP1 = N1->getOperand(1);
13578 DebugLoc DL = N->getDebugLoc();
13580 // The SETCCs should both refer to the same CMP.
13581 if (CMP0.getOpcode() != X86ISD::CMP || CMP0 != CMP1)
13584 SDValue CMP00 = CMP0->getOperand(0);
13585 SDValue CMP01 = CMP0->getOperand(1);
13586 EVT VT = CMP00.getValueType();
13588 if (VT == MVT::f32 || VT == MVT::f64) {
13589 bool ExpectingFlags = false;
13590 // Check for any users that want flags:
13591 for (SDNode::use_iterator UI = N->use_begin(),
13593 !ExpectingFlags && UI != UE; ++UI)
13594 switch (UI->getOpcode()) {
13599 ExpectingFlags = true;
13601 case ISD::CopyToReg:
13602 case ISD::SIGN_EXTEND:
13603 case ISD::ZERO_EXTEND:
13604 case ISD::ANY_EXTEND:
13608 if (!ExpectingFlags) {
13609 enum X86::CondCode cc0 = (enum X86::CondCode)N0.getConstantOperandVal(0);
13610 enum X86::CondCode cc1 = (enum X86::CondCode)N1.getConstantOperandVal(0);
13612 if (cc1 == X86::COND_E || cc1 == X86::COND_NE) {
13613 X86::CondCode tmp = cc0;
13618 if ((cc0 == X86::COND_E && cc1 == X86::COND_NP) ||
13619 (cc0 == X86::COND_NE && cc1 == X86::COND_P)) {
13620 bool is64BitFP = (CMP00.getValueType() == MVT::f64);
13621 X86ISD::NodeType NTOperator = is64BitFP ?
13622 X86ISD::FSETCCsd : X86ISD::FSETCCss;
13623 // FIXME: need symbolic constants for these magic numbers.
13624 // See X86ATTInstPrinter.cpp:printSSECC().
13625 unsigned x86cc = (cc0 == X86::COND_E) ? 0 : 4;
13626 SDValue OnesOrZeroesF = DAG.getNode(NTOperator, DL, MVT::f32, CMP00, CMP01,
13627 DAG.getConstant(x86cc, MVT::i8));
13628 SDValue OnesOrZeroesI = DAG.getNode(ISD::BITCAST, DL, MVT::i32,
13630 SDValue ANDed = DAG.getNode(ISD::AND, DL, MVT::i32, OnesOrZeroesI,
13631 DAG.getConstant(1, MVT::i32));
13632 SDValue OneBitOfTruth = DAG.getNode(ISD::TRUNCATE, DL, MVT::i8, ANDed);
13633 return OneBitOfTruth;
13641 /// CanFoldXORWithAllOnes - Test whether the XOR operand is a AllOnes vector
13642 /// so it can be folded inside ANDNP.
13643 static bool CanFoldXORWithAllOnes(const SDNode *N) {
13644 EVT VT = N->getValueType(0);
13646 // Match direct AllOnes for 128 and 256-bit vectors
13647 if (ISD::isBuildVectorAllOnes(N))
13650 // Look through a bit convert.
13651 if (N->getOpcode() == ISD::BITCAST)
13652 N = N->getOperand(0).getNode();
13654 // Sometimes the operand may come from a insert_subvector building a 256-bit
13656 if (VT.getSizeInBits() == 256 &&
13657 N->getOpcode() == ISD::INSERT_SUBVECTOR) {
13658 SDValue V1 = N->getOperand(0);
13659 SDValue V2 = N->getOperand(1);
13661 if (V1.getOpcode() == ISD::INSERT_SUBVECTOR &&
13662 V1.getOperand(0).getOpcode() == ISD::UNDEF &&
13663 ISD::isBuildVectorAllOnes(V1.getOperand(1).getNode()) &&
13664 ISD::isBuildVectorAllOnes(V2.getNode()))
13671 static SDValue PerformAndCombine(SDNode *N, SelectionDAG &DAG,
13672 TargetLowering::DAGCombinerInfo &DCI,
13673 const X86Subtarget *Subtarget) {
13674 if (DCI.isBeforeLegalizeOps())
13677 SDValue R = CMPEQCombine(N, DAG, DCI, Subtarget);
13681 EVT VT = N->getValueType(0);
13683 // Create ANDN, BLSI, and BLSR instructions
13684 // BLSI is X & (-X)
13685 // BLSR is X & (X-1)
13686 if (Subtarget->hasBMI() && (VT == MVT::i32 || VT == MVT::i64)) {
13687 SDValue N0 = N->getOperand(0);
13688 SDValue N1 = N->getOperand(1);
13689 DebugLoc DL = N->getDebugLoc();
13691 // Check LHS for not
13692 if (N0.getOpcode() == ISD::XOR && isAllOnes(N0.getOperand(1)))
13693 return DAG.getNode(X86ISD::ANDN, DL, VT, N0.getOperand(0), N1);
13694 // Check RHS for not
13695 if (N1.getOpcode() == ISD::XOR && isAllOnes(N1.getOperand(1)))
13696 return DAG.getNode(X86ISD::ANDN, DL, VT, N1.getOperand(0), N0);
13698 // Check LHS for neg
13699 if (N0.getOpcode() == ISD::SUB && N0.getOperand(1) == N1 &&
13700 isZero(N0.getOperand(0)))
13701 return DAG.getNode(X86ISD::BLSI, DL, VT, N1);
13703 // Check RHS for neg
13704 if (N1.getOpcode() == ISD::SUB && N1.getOperand(1) == N0 &&
13705 isZero(N1.getOperand(0)))
13706 return DAG.getNode(X86ISD::BLSI, DL, VT, N0);
13708 // Check LHS for X-1
13709 if (N0.getOpcode() == ISD::ADD && N0.getOperand(0) == N1 &&
13710 isAllOnes(N0.getOperand(1)))
13711 return DAG.getNode(X86ISD::BLSR, DL, VT, N1);
13713 // Check RHS for X-1
13714 if (N1.getOpcode() == ISD::ADD && N1.getOperand(0) == N0 &&
13715 isAllOnes(N1.getOperand(1)))
13716 return DAG.getNode(X86ISD::BLSR, DL, VT, N0);
13721 // Want to form ANDNP nodes:
13722 // 1) In the hopes of then easily combining them with OR and AND nodes
13723 // to form PBLEND/PSIGN.
13724 // 2) To match ANDN packed intrinsics
13725 if (VT != MVT::v2i64 && VT != MVT::v4i64)
13728 SDValue N0 = N->getOperand(0);
13729 SDValue N1 = N->getOperand(1);
13730 DebugLoc DL = N->getDebugLoc();
13732 // Check LHS for vnot
13733 if (N0.getOpcode() == ISD::XOR &&
13734 //ISD::isBuildVectorAllOnes(N0.getOperand(1).getNode()))
13735 CanFoldXORWithAllOnes(N0.getOperand(1).getNode()))
13736 return DAG.getNode(X86ISD::ANDNP, DL, VT, N0.getOperand(0), N1);
13738 // Check RHS for vnot
13739 if (N1.getOpcode() == ISD::XOR &&
13740 //ISD::isBuildVectorAllOnes(N1.getOperand(1).getNode()))
13741 CanFoldXORWithAllOnes(N1.getOperand(1).getNode()))
13742 return DAG.getNode(X86ISD::ANDNP, DL, VT, N1.getOperand(0), N0);
13747 static SDValue PerformOrCombine(SDNode *N, SelectionDAG &DAG,
13748 TargetLowering::DAGCombinerInfo &DCI,
13749 const X86Subtarget *Subtarget) {
13750 if (DCI.isBeforeLegalizeOps())
13753 SDValue R = CMPEQCombine(N, DAG, DCI, Subtarget);
13757 EVT VT = N->getValueType(0);
13759 SDValue N0 = N->getOperand(0);
13760 SDValue N1 = N->getOperand(1);
13762 // look for psign/blend
13763 if (VT == MVT::v2i64 || VT == MVT::v4i64) {
13764 if (!Subtarget->hasSSSE3() ||
13765 (VT == MVT::v4i64 && !Subtarget->hasAVX2()))
13768 // Canonicalize pandn to RHS
13769 if (N0.getOpcode() == X86ISD::ANDNP)
13771 // or (and (m, y), (pandn m, x))
13772 if (N0.getOpcode() == ISD::AND && N1.getOpcode() == X86ISD::ANDNP) {
13773 SDValue Mask = N1.getOperand(0);
13774 SDValue X = N1.getOperand(1);
13776 if (N0.getOperand(0) == Mask)
13777 Y = N0.getOperand(1);
13778 if (N0.getOperand(1) == Mask)
13779 Y = N0.getOperand(0);
13781 // Check to see if the mask appeared in both the AND and ANDNP and
13785 // Validate that X, Y, and Mask are BIT_CONVERTS, and see through them.
13786 if (Mask.getOpcode() != ISD::BITCAST ||
13787 X.getOpcode() != ISD::BITCAST ||
13788 Y.getOpcode() != ISD::BITCAST)
13791 // Look through mask bitcast.
13792 Mask = Mask.getOperand(0);
13793 EVT MaskVT = Mask.getValueType();
13795 // Validate that the Mask operand is a vector sra node. The sra node
13796 // will be an intrinsic.
13797 if (Mask.getOpcode() != ISD::INTRINSIC_WO_CHAIN)
13800 // FIXME: what to do for bytes, since there is a psignb/pblendvb, but
13801 // there is no psrai.b
13802 switch (cast<ConstantSDNode>(Mask.getOperand(0))->getZExtValue()) {
13803 case Intrinsic::x86_sse2_psrai_w:
13804 case Intrinsic::x86_sse2_psrai_d:
13805 case Intrinsic::x86_avx2_psrai_w:
13806 case Intrinsic::x86_avx2_psrai_d:
13808 default: return SDValue();
13811 // Check that the SRA is all signbits.
13812 SDValue SraC = Mask.getOperand(2);
13813 unsigned SraAmt = cast<ConstantSDNode>(SraC)->getZExtValue();
13814 unsigned EltBits = MaskVT.getVectorElementType().getSizeInBits();
13815 if ((SraAmt + 1) != EltBits)
13818 DebugLoc DL = N->getDebugLoc();
13820 // Now we know we at least have a plendvb with the mask val. See if
13821 // we can form a psignb/w/d.
13822 // psign = x.type == y.type == mask.type && y = sub(0, x);
13823 X = X.getOperand(0);
13824 Y = Y.getOperand(0);
13825 if (Y.getOpcode() == ISD::SUB && Y.getOperand(1) == X &&
13826 ISD::isBuildVectorAllZeros(Y.getOperand(0).getNode()) &&
13827 X.getValueType() == MaskVT && X.getValueType() == Y.getValueType() &&
13828 (EltBits == 8 || EltBits == 16 || EltBits == 32)) {
13829 SDValue Sign = DAG.getNode(X86ISD::PSIGN, DL, MaskVT, X,
13830 Mask.getOperand(1));
13831 return DAG.getNode(ISD::BITCAST, DL, VT, Sign);
13833 // PBLENDVB only available on SSE 4.1
13834 if (!Subtarget->hasSSE41())
13837 EVT BlendVT = (VT == MVT::v4i64) ? MVT::v32i8 : MVT::v16i8;
13839 X = DAG.getNode(ISD::BITCAST, DL, BlendVT, X);
13840 Y = DAG.getNode(ISD::BITCAST, DL, BlendVT, Y);
13841 Mask = DAG.getNode(ISD::BITCAST, DL, BlendVT, Mask);
13842 Mask = DAG.getNode(ISD::VSELECT, DL, BlendVT, Mask, Y, X);
13843 return DAG.getNode(ISD::BITCAST, DL, VT, Mask);
13847 if (VT != MVT::i16 && VT != MVT::i32 && VT != MVT::i64)
13850 // fold (or (x << c) | (y >> (64 - c))) ==> (shld64 x, y, c)
13851 if (N0.getOpcode() == ISD::SRL && N1.getOpcode() == ISD::SHL)
13853 if (N0.getOpcode() != ISD::SHL || N1.getOpcode() != ISD::SRL)
13855 if (!N0.hasOneUse() || !N1.hasOneUse())
13858 SDValue ShAmt0 = N0.getOperand(1);
13859 if (ShAmt0.getValueType() != MVT::i8)
13861 SDValue ShAmt1 = N1.getOperand(1);
13862 if (ShAmt1.getValueType() != MVT::i8)
13864 if (ShAmt0.getOpcode() == ISD::TRUNCATE)
13865 ShAmt0 = ShAmt0.getOperand(0);
13866 if (ShAmt1.getOpcode() == ISD::TRUNCATE)
13867 ShAmt1 = ShAmt1.getOperand(0);
13869 DebugLoc DL = N->getDebugLoc();
13870 unsigned Opc = X86ISD::SHLD;
13871 SDValue Op0 = N0.getOperand(0);
13872 SDValue Op1 = N1.getOperand(0);
13873 if (ShAmt0.getOpcode() == ISD::SUB) {
13874 Opc = X86ISD::SHRD;
13875 std::swap(Op0, Op1);
13876 std::swap(ShAmt0, ShAmt1);
13879 unsigned Bits = VT.getSizeInBits();
13880 if (ShAmt1.getOpcode() == ISD::SUB) {
13881 SDValue Sum = ShAmt1.getOperand(0);
13882 if (ConstantSDNode *SumC = dyn_cast<ConstantSDNode>(Sum)) {
13883 SDValue ShAmt1Op1 = ShAmt1.getOperand(1);
13884 if (ShAmt1Op1.getNode()->getOpcode() == ISD::TRUNCATE)
13885 ShAmt1Op1 = ShAmt1Op1.getOperand(0);
13886 if (SumC->getSExtValue() == Bits && ShAmt1Op1 == ShAmt0)
13887 return DAG.getNode(Opc, DL, VT,
13889 DAG.getNode(ISD::TRUNCATE, DL,
13892 } else if (ConstantSDNode *ShAmt1C = dyn_cast<ConstantSDNode>(ShAmt1)) {
13893 ConstantSDNode *ShAmt0C = dyn_cast<ConstantSDNode>(ShAmt0);
13895 ShAmt0C->getSExtValue() + ShAmt1C->getSExtValue() == Bits)
13896 return DAG.getNode(Opc, DL, VT,
13897 N0.getOperand(0), N1.getOperand(0),
13898 DAG.getNode(ISD::TRUNCATE, DL,
13905 // PerformXorCombine - Attempts to turn XOR nodes into BLSMSK nodes
13906 static SDValue PerformXorCombine(SDNode *N, SelectionDAG &DAG,
13907 TargetLowering::DAGCombinerInfo &DCI,
13908 const X86Subtarget *Subtarget) {
13909 if (DCI.isBeforeLegalizeOps())
13912 EVT VT = N->getValueType(0);
13914 if (VT != MVT::i32 && VT != MVT::i64)
13917 assert(Subtarget->hasBMI() && "Creating BLSMSK requires BMI instructions");
13919 // Create BLSMSK instructions by finding X ^ (X-1)
13920 SDValue N0 = N->getOperand(0);
13921 SDValue N1 = N->getOperand(1);
13922 DebugLoc DL = N->getDebugLoc();
13924 if (N0.getOpcode() == ISD::ADD && N0.getOperand(0) == N1 &&
13925 isAllOnes(N0.getOperand(1)))
13926 return DAG.getNode(X86ISD::BLSMSK, DL, VT, N1);
13928 if (N1.getOpcode() == ISD::ADD && N1.getOperand(0) == N0 &&
13929 isAllOnes(N1.getOperand(1)))
13930 return DAG.getNode(X86ISD::BLSMSK, DL, VT, N0);
13935 /// PerformLOADCombine - Do target-specific dag combines on LOAD nodes.
13936 static SDValue PerformLOADCombine(SDNode *N, SelectionDAG &DAG,
13937 const X86Subtarget *Subtarget) {
13938 LoadSDNode *Ld = cast<LoadSDNode>(N);
13939 EVT RegVT = Ld->getValueType(0);
13940 EVT MemVT = Ld->getMemoryVT();
13941 DebugLoc dl = Ld->getDebugLoc();
13942 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
13944 ISD::LoadExtType Ext = Ld->getExtensionType();
13946 // If this is a vector EXT Load then attempt to optimize it using a
13947 // shuffle. We need SSE4 for the shuffles.
13948 // TODO: It is possible to support ZExt by zeroing the undef values
13949 // during the shuffle phase or after the shuffle.
13950 if (RegVT.isVector() && RegVT.isInteger() &&
13951 Ext == ISD::EXTLOAD && Subtarget->hasSSE41()) {
13952 assert(MemVT != RegVT && "Cannot extend to the same type");
13953 assert(MemVT.isVector() && "Must load a vector from memory");
13955 unsigned NumElems = RegVT.getVectorNumElements();
13956 unsigned RegSz = RegVT.getSizeInBits();
13957 unsigned MemSz = MemVT.getSizeInBits();
13958 assert(RegSz > MemSz && "Register size must be greater than the mem size");
13959 // All sizes must be a power of two
13960 if (!isPowerOf2_32(RegSz * MemSz * NumElems)) return SDValue();
13962 // Attempt to load the original value using a single load op.
13963 // Find a scalar type which is equal to the loaded word size.
13964 MVT SclrLoadTy = MVT::i8;
13965 for (unsigned tp = MVT::FIRST_INTEGER_VALUETYPE;
13966 tp < MVT::LAST_INTEGER_VALUETYPE; ++tp) {
13967 MVT Tp = (MVT::SimpleValueType)tp;
13968 if (TLI.isTypeLegal(Tp) && Tp.getSizeInBits() == MemSz) {
13974 // Proceed if a load word is found.
13975 if (SclrLoadTy.getSizeInBits() != MemSz) return SDValue();
13977 EVT LoadUnitVecVT = EVT::getVectorVT(*DAG.getContext(), SclrLoadTy,
13978 RegSz/SclrLoadTy.getSizeInBits());
13980 EVT WideVecVT = EVT::getVectorVT(*DAG.getContext(), MemVT.getScalarType(),
13981 RegSz/MemVT.getScalarType().getSizeInBits());
13982 // Can't shuffle using an illegal type.
13983 if (!TLI.isTypeLegal(WideVecVT)) return SDValue();
13985 // Perform a single load.
13986 SDValue ScalarLoad = DAG.getLoad(SclrLoadTy, dl, Ld->getChain(),
13988 Ld->getPointerInfo(), Ld->isVolatile(),
13989 Ld->isNonTemporal(), Ld->isInvariant(),
13990 Ld->getAlignment());
13992 // Insert the word loaded into a vector.
13993 SDValue ScalarInVector = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
13994 LoadUnitVecVT, ScalarLoad);
13996 // Bitcast the loaded value to a vector of the original element type, in
13997 // the size of the target vector type.
13998 SDValue SlicedVec = DAG.getNode(ISD::BITCAST, dl, WideVecVT,
14000 unsigned SizeRatio = RegSz/MemSz;
14002 // Redistribute the loaded elements into the different locations.
14003 SmallVector<int, 8> ShuffleVec(NumElems * SizeRatio, -1);
14004 for (unsigned i = 0; i < NumElems; i++) ShuffleVec[i*SizeRatio] = i;
14006 SDValue Shuff = DAG.getVectorShuffle(WideVecVT, dl, SlicedVec,
14007 DAG.getUNDEF(SlicedVec.getValueType()),
14008 ShuffleVec.data());
14010 // Bitcast to the requested type.
14011 Shuff = DAG.getNode(ISD::BITCAST, dl, RegVT, Shuff);
14012 // Replace the original load with the new sequence
14013 // and return the new chain.
14014 DAG.ReplaceAllUsesOfValueWith(SDValue(N, 0), Shuff);
14015 return SDValue(ScalarLoad.getNode(), 1);
14021 /// PerformSTORECombine - Do target-specific dag combines on STORE nodes.
14022 static SDValue PerformSTORECombine(SDNode *N, SelectionDAG &DAG,
14023 const X86Subtarget *Subtarget) {
14024 StoreSDNode *St = cast<StoreSDNode>(N);
14025 EVT VT = St->getValue().getValueType();
14026 EVT StVT = St->getMemoryVT();
14027 DebugLoc dl = St->getDebugLoc();
14028 SDValue StoredVal = St->getOperand(1);
14029 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
14031 // If we are saving a concatenation of two XMM registers, perform two stores.
14032 // This is better in Sandy Bridge cause one 256-bit mem op is done via two
14033 // 128-bit ones. If in the future the cost becomes only one memory access the
14034 // first version would be better.
14035 if (VT.getSizeInBits() == 256 &&
14036 StoredVal.getNode()->getOpcode() == ISD::CONCAT_VECTORS &&
14037 StoredVal.getNumOperands() == 2) {
14039 SDValue Value0 = StoredVal.getOperand(0);
14040 SDValue Value1 = StoredVal.getOperand(1);
14042 SDValue Stride = DAG.getConstant(16, TLI.getPointerTy());
14043 SDValue Ptr0 = St->getBasePtr();
14044 SDValue Ptr1 = DAG.getNode(ISD::ADD, dl, Ptr0.getValueType(), Ptr0, Stride);
14046 SDValue Ch0 = DAG.getStore(St->getChain(), dl, Value0, Ptr0,
14047 St->getPointerInfo(), St->isVolatile(),
14048 St->isNonTemporal(), St->getAlignment());
14049 SDValue Ch1 = DAG.getStore(St->getChain(), dl, Value1, Ptr1,
14050 St->getPointerInfo(), St->isVolatile(),
14051 St->isNonTemporal(), St->getAlignment());
14052 return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Ch0, Ch1);
14055 // Optimize trunc store (of multiple scalars) to shuffle and store.
14056 // First, pack all of the elements in one place. Next, store to memory
14057 // in fewer chunks.
14058 if (St->isTruncatingStore() && VT.isVector()) {
14059 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
14060 unsigned NumElems = VT.getVectorNumElements();
14061 assert(StVT != VT && "Cannot truncate to the same type");
14062 unsigned FromSz = VT.getVectorElementType().getSizeInBits();
14063 unsigned ToSz = StVT.getVectorElementType().getSizeInBits();
14065 // From, To sizes and ElemCount must be pow of two
14066 if (!isPowerOf2_32(NumElems * FromSz * ToSz)) return SDValue();
14067 // We are going to use the original vector elt for storing.
14068 // Accumulated smaller vector elements must be a multiple of the store size.
14069 if (0 != (NumElems * FromSz) % ToSz) return SDValue();
14071 unsigned SizeRatio = FromSz / ToSz;
14073 assert(SizeRatio * NumElems * ToSz == VT.getSizeInBits());
14075 // Create a type on which we perform the shuffle
14076 EVT WideVecVT = EVT::getVectorVT(*DAG.getContext(),
14077 StVT.getScalarType(), NumElems*SizeRatio);
14079 assert(WideVecVT.getSizeInBits() == VT.getSizeInBits());
14081 SDValue WideVec = DAG.getNode(ISD::BITCAST, dl, WideVecVT, St->getValue());
14082 SmallVector<int, 8> ShuffleVec(NumElems * SizeRatio, -1);
14083 for (unsigned i = 0; i < NumElems; i++ ) ShuffleVec[i] = i * SizeRatio;
14085 // Can't shuffle using an illegal type
14086 if (!TLI.isTypeLegal(WideVecVT)) return SDValue();
14088 SDValue Shuff = DAG.getVectorShuffle(WideVecVT, dl, WideVec,
14089 DAG.getUNDEF(WideVec.getValueType()),
14090 ShuffleVec.data());
14091 // At this point all of the data is stored at the bottom of the
14092 // register. We now need to save it to mem.
14094 // Find the largest store unit
14095 MVT StoreType = MVT::i8;
14096 for (unsigned tp = MVT::FIRST_INTEGER_VALUETYPE;
14097 tp < MVT::LAST_INTEGER_VALUETYPE; ++tp) {
14098 MVT Tp = (MVT::SimpleValueType)tp;
14099 if (TLI.isTypeLegal(Tp) && StoreType.getSizeInBits() < NumElems * ToSz)
14103 // Bitcast the original vector into a vector of store-size units
14104 EVT StoreVecVT = EVT::getVectorVT(*DAG.getContext(),
14105 StoreType, VT.getSizeInBits()/EVT(StoreType).getSizeInBits());
14106 assert(StoreVecVT.getSizeInBits() == VT.getSizeInBits());
14107 SDValue ShuffWide = DAG.getNode(ISD::BITCAST, dl, StoreVecVT, Shuff);
14108 SmallVector<SDValue, 8> Chains;
14109 SDValue Increment = DAG.getConstant(StoreType.getSizeInBits()/8,
14110 TLI.getPointerTy());
14111 SDValue Ptr = St->getBasePtr();
14113 // Perform one or more big stores into memory.
14114 for (unsigned i = 0; i < (ToSz*NumElems)/StoreType.getSizeInBits() ; i++) {
14115 SDValue SubVec = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl,
14116 StoreType, ShuffWide,
14117 DAG.getIntPtrConstant(i));
14118 SDValue Ch = DAG.getStore(St->getChain(), dl, SubVec, Ptr,
14119 St->getPointerInfo(), St->isVolatile(),
14120 St->isNonTemporal(), St->getAlignment());
14121 Ptr = DAG.getNode(ISD::ADD, dl, Ptr.getValueType(), Ptr, Increment);
14122 Chains.push_back(Ch);
14125 return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, &Chains[0],
14130 // Turn load->store of MMX types into GPR load/stores. This avoids clobbering
14131 // the FP state in cases where an emms may be missing.
14132 // A preferable solution to the general problem is to figure out the right
14133 // places to insert EMMS. This qualifies as a quick hack.
14135 // Similarly, turn load->store of i64 into double load/stores in 32-bit mode.
14136 if (VT.getSizeInBits() != 64)
14139 const Function *F = DAG.getMachineFunction().getFunction();
14140 bool NoImplicitFloatOps = F->hasFnAttr(Attribute::NoImplicitFloat);
14141 bool F64IsLegal = !DAG.getTarget().Options.UseSoftFloat && !NoImplicitFloatOps
14142 && Subtarget->hasSSE2();
14143 if ((VT.isVector() ||
14144 (VT == MVT::i64 && F64IsLegal && !Subtarget->is64Bit())) &&
14145 isa<LoadSDNode>(St->getValue()) &&
14146 !cast<LoadSDNode>(St->getValue())->isVolatile() &&
14147 St->getChain().hasOneUse() && !St->isVolatile()) {
14148 SDNode* LdVal = St->getValue().getNode();
14149 LoadSDNode *Ld = 0;
14150 int TokenFactorIndex = -1;
14151 SmallVector<SDValue, 8> Ops;
14152 SDNode* ChainVal = St->getChain().getNode();
14153 // Must be a store of a load. We currently handle two cases: the load
14154 // is a direct child, and it's under an intervening TokenFactor. It is
14155 // possible to dig deeper under nested TokenFactors.
14156 if (ChainVal == LdVal)
14157 Ld = cast<LoadSDNode>(St->getChain());
14158 else if (St->getValue().hasOneUse() &&
14159 ChainVal->getOpcode() == ISD::TokenFactor) {
14160 for (unsigned i=0, e = ChainVal->getNumOperands(); i != e; ++i) {
14161 if (ChainVal->getOperand(i).getNode() == LdVal) {
14162 TokenFactorIndex = i;
14163 Ld = cast<LoadSDNode>(St->getValue());
14165 Ops.push_back(ChainVal->getOperand(i));
14169 if (!Ld || !ISD::isNormalLoad(Ld))
14172 // If this is not the MMX case, i.e. we are just turning i64 load/store
14173 // into f64 load/store, avoid the transformation if there are multiple
14174 // uses of the loaded value.
14175 if (!VT.isVector() && !Ld->hasNUsesOfValue(1, 0))
14178 DebugLoc LdDL = Ld->getDebugLoc();
14179 DebugLoc StDL = N->getDebugLoc();
14180 // If we are a 64-bit capable x86, lower to a single movq load/store pair.
14181 // Otherwise, if it's legal to use f64 SSE instructions, use f64 load/store
14183 if (Subtarget->is64Bit() || F64IsLegal) {
14184 EVT LdVT = Subtarget->is64Bit() ? MVT::i64 : MVT::f64;
14185 SDValue NewLd = DAG.getLoad(LdVT, LdDL, Ld->getChain(), Ld->getBasePtr(),
14186 Ld->getPointerInfo(), Ld->isVolatile(),
14187 Ld->isNonTemporal(), Ld->isInvariant(),
14188 Ld->getAlignment());
14189 SDValue NewChain = NewLd.getValue(1);
14190 if (TokenFactorIndex != -1) {
14191 Ops.push_back(NewChain);
14192 NewChain = DAG.getNode(ISD::TokenFactor, LdDL, MVT::Other, &Ops[0],
14195 return DAG.getStore(NewChain, StDL, NewLd, St->getBasePtr(),
14196 St->getPointerInfo(),
14197 St->isVolatile(), St->isNonTemporal(),
14198 St->getAlignment());
14201 // Otherwise, lower to two pairs of 32-bit loads / stores.
14202 SDValue LoAddr = Ld->getBasePtr();
14203 SDValue HiAddr = DAG.getNode(ISD::ADD, LdDL, MVT::i32, LoAddr,
14204 DAG.getConstant(4, MVT::i32));
14206 SDValue LoLd = DAG.getLoad(MVT::i32, LdDL, Ld->getChain(), LoAddr,
14207 Ld->getPointerInfo(),
14208 Ld->isVolatile(), Ld->isNonTemporal(),
14209 Ld->isInvariant(), Ld->getAlignment());
14210 SDValue HiLd = DAG.getLoad(MVT::i32, LdDL, Ld->getChain(), HiAddr,
14211 Ld->getPointerInfo().getWithOffset(4),
14212 Ld->isVolatile(), Ld->isNonTemporal(),
14214 MinAlign(Ld->getAlignment(), 4));
14216 SDValue NewChain = LoLd.getValue(1);
14217 if (TokenFactorIndex != -1) {
14218 Ops.push_back(LoLd);
14219 Ops.push_back(HiLd);
14220 NewChain = DAG.getNode(ISD::TokenFactor, LdDL, MVT::Other, &Ops[0],
14224 LoAddr = St->getBasePtr();
14225 HiAddr = DAG.getNode(ISD::ADD, StDL, MVT::i32, LoAddr,
14226 DAG.getConstant(4, MVT::i32));
14228 SDValue LoSt = DAG.getStore(NewChain, StDL, LoLd, LoAddr,
14229 St->getPointerInfo(),
14230 St->isVolatile(), St->isNonTemporal(),
14231 St->getAlignment());
14232 SDValue HiSt = DAG.getStore(NewChain, StDL, HiLd, HiAddr,
14233 St->getPointerInfo().getWithOffset(4),
14235 St->isNonTemporal(),
14236 MinAlign(St->getAlignment(), 4));
14237 return DAG.getNode(ISD::TokenFactor, StDL, MVT::Other, LoSt, HiSt);
14242 /// isHorizontalBinOp - Return 'true' if this vector operation is "horizontal"
14243 /// and return the operands for the horizontal operation in LHS and RHS. A
14244 /// horizontal operation performs the binary operation on successive elements
14245 /// of its first operand, then on successive elements of its second operand,
14246 /// returning the resulting values in a vector. For example, if
14247 /// A = < float a0, float a1, float a2, float a3 >
14249 /// B = < float b0, float b1, float b2, float b3 >
14250 /// then the result of doing a horizontal operation on A and B is
14251 /// A horizontal-op B = < a0 op a1, a2 op a3, b0 op b1, b2 op b3 >.
14252 /// In short, LHS and RHS are inspected to see if LHS op RHS is of the form
14253 /// A horizontal-op B, for some already available A and B, and if so then LHS is
14254 /// set to A, RHS to B, and the routine returns 'true'.
14255 /// Note that the binary operation should have the property that if one of the
14256 /// operands is UNDEF then the result is UNDEF.
14257 static bool isHorizontalBinOp(SDValue &LHS, SDValue &RHS, bool IsCommutative) {
14258 // Look for the following pattern: if
14259 // A = < float a0, float a1, float a2, float a3 >
14260 // B = < float b0, float b1, float b2, float b3 >
14262 // LHS = VECTOR_SHUFFLE A, B, <0, 2, 4, 6>
14263 // RHS = VECTOR_SHUFFLE A, B, <1, 3, 5, 7>
14264 // then LHS op RHS = < a0 op a1, a2 op a3, b0 op b1, b2 op b3 >
14265 // which is A horizontal-op B.
14267 // At least one of the operands should be a vector shuffle.
14268 if (LHS.getOpcode() != ISD::VECTOR_SHUFFLE &&
14269 RHS.getOpcode() != ISD::VECTOR_SHUFFLE)
14272 EVT VT = LHS.getValueType();
14274 assert((VT.is128BitVector() || VT.is256BitVector()) &&
14275 "Unsupported vector type for horizontal add/sub");
14277 // Handle 128 and 256-bit vector lengths. AVX defines horizontal add/sub to
14278 // operate independently on 128-bit lanes.
14279 unsigned NumElts = VT.getVectorNumElements();
14280 unsigned NumLanes = VT.getSizeInBits()/128;
14281 unsigned NumLaneElts = NumElts / NumLanes;
14282 assert((NumLaneElts % 2 == 0) &&
14283 "Vector type should have an even number of elements in each lane");
14284 unsigned HalfLaneElts = NumLaneElts/2;
14286 // View LHS in the form
14287 // LHS = VECTOR_SHUFFLE A, B, LMask
14288 // If LHS is not a shuffle then pretend it is the shuffle
14289 // LHS = VECTOR_SHUFFLE LHS, undef, <0, 1, ..., N-1>
14290 // NOTE: in what follows a default initialized SDValue represents an UNDEF of
14293 SmallVector<int, 16> LMask(NumElts);
14294 if (LHS.getOpcode() == ISD::VECTOR_SHUFFLE) {
14295 if (LHS.getOperand(0).getOpcode() != ISD::UNDEF)
14296 A = LHS.getOperand(0);
14297 if (LHS.getOperand(1).getOpcode() != ISD::UNDEF)
14298 B = LHS.getOperand(1);
14299 ArrayRef<int> Mask = cast<ShuffleVectorSDNode>(LHS.getNode())->getMask();
14300 std::copy(Mask.begin(), Mask.end(), LMask.begin());
14302 if (LHS.getOpcode() != ISD::UNDEF)
14304 for (unsigned i = 0; i != NumElts; ++i)
14308 // Likewise, view RHS in the form
14309 // RHS = VECTOR_SHUFFLE C, D, RMask
14311 SmallVector<int, 16> RMask(NumElts);
14312 if (RHS.getOpcode() == ISD::VECTOR_SHUFFLE) {
14313 if (RHS.getOperand(0).getOpcode() != ISD::UNDEF)
14314 C = RHS.getOperand(0);
14315 if (RHS.getOperand(1).getOpcode() != ISD::UNDEF)
14316 D = RHS.getOperand(1);
14317 ArrayRef<int> Mask = cast<ShuffleVectorSDNode>(RHS.getNode())->getMask();
14318 std::copy(Mask.begin(), Mask.end(), RMask.begin());
14320 if (RHS.getOpcode() != ISD::UNDEF)
14322 for (unsigned i = 0; i != NumElts; ++i)
14326 // Check that the shuffles are both shuffling the same vectors.
14327 if (!(A == C && B == D) && !(A == D && B == C))
14330 // If everything is UNDEF then bail out: it would be better to fold to UNDEF.
14331 if (!A.getNode() && !B.getNode())
14334 // If A and B occur in reverse order in RHS, then "swap" them (which means
14335 // rewriting the mask).
14337 CommuteVectorShuffleMask(RMask, NumElts);
14339 // At this point LHS and RHS are equivalent to
14340 // LHS = VECTOR_SHUFFLE A, B, LMask
14341 // RHS = VECTOR_SHUFFLE A, B, RMask
14342 // Check that the masks correspond to performing a horizontal operation.
14343 for (unsigned i = 0; i != NumElts; ++i) {
14344 int LIdx = LMask[i], RIdx = RMask[i];
14346 // Ignore any UNDEF components.
14347 if (LIdx < 0 || RIdx < 0 ||
14348 (!A.getNode() && (LIdx < (int)NumElts || RIdx < (int)NumElts)) ||
14349 (!B.getNode() && (LIdx >= (int)NumElts || RIdx >= (int)NumElts)))
14352 // Check that successive elements are being operated on. If not, this is
14353 // not a horizontal operation.
14354 unsigned Src = (i/HalfLaneElts) % 2; // each lane is split between srcs
14355 unsigned LaneStart = (i/NumLaneElts) * NumLaneElts;
14356 int Index = 2*(i%HalfLaneElts) + NumElts*Src + LaneStart;
14357 if (!(LIdx == Index && RIdx == Index + 1) &&
14358 !(IsCommutative && LIdx == Index + 1 && RIdx == Index))
14362 LHS = A.getNode() ? A : B; // If A is 'UNDEF', use B for it.
14363 RHS = B.getNode() ? B : A; // If B is 'UNDEF', use A for it.
14367 /// PerformFADDCombine - Do target-specific dag combines on floating point adds.
14368 static SDValue PerformFADDCombine(SDNode *N, SelectionDAG &DAG,
14369 const X86Subtarget *Subtarget) {
14370 EVT VT = N->getValueType(0);
14371 SDValue LHS = N->getOperand(0);
14372 SDValue RHS = N->getOperand(1);
14374 // Try to synthesize horizontal adds from adds of shuffles.
14375 if (((Subtarget->hasSSE3() && (VT == MVT::v4f32 || VT == MVT::v2f64)) ||
14376 (Subtarget->hasAVX() && (VT == MVT::v8f32 || VT == MVT::v4f64))) &&
14377 isHorizontalBinOp(LHS, RHS, true))
14378 return DAG.getNode(X86ISD::FHADD, N->getDebugLoc(), VT, LHS, RHS);
14382 /// PerformFSUBCombine - Do target-specific dag combines on floating point subs.
14383 static SDValue PerformFSUBCombine(SDNode *N, SelectionDAG &DAG,
14384 const X86Subtarget *Subtarget) {
14385 EVT VT = N->getValueType(0);
14386 SDValue LHS = N->getOperand(0);
14387 SDValue RHS = N->getOperand(1);
14389 // Try to synthesize horizontal subs from subs of shuffles.
14390 if (((Subtarget->hasSSE3() && (VT == MVT::v4f32 || VT == MVT::v2f64)) ||
14391 (Subtarget->hasAVX() && (VT == MVT::v8f32 || VT == MVT::v4f64))) &&
14392 isHorizontalBinOp(LHS, RHS, false))
14393 return DAG.getNode(X86ISD::FHSUB, N->getDebugLoc(), VT, LHS, RHS);
14397 /// PerformFORCombine - Do target-specific dag combines on X86ISD::FOR and
14398 /// X86ISD::FXOR nodes.
14399 static SDValue PerformFORCombine(SDNode *N, SelectionDAG &DAG) {
14400 assert(N->getOpcode() == X86ISD::FOR || N->getOpcode() == X86ISD::FXOR);
14401 // F[X]OR(0.0, x) -> x
14402 // F[X]OR(x, 0.0) -> x
14403 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(0)))
14404 if (C->getValueAPF().isPosZero())
14405 return N->getOperand(1);
14406 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(1)))
14407 if (C->getValueAPF().isPosZero())
14408 return N->getOperand(0);
14412 /// PerformFANDCombine - Do target-specific dag combines on X86ISD::FAND nodes.
14413 static SDValue PerformFANDCombine(SDNode *N, SelectionDAG &DAG) {
14414 // FAND(0.0, x) -> 0.0
14415 // FAND(x, 0.0) -> 0.0
14416 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(0)))
14417 if (C->getValueAPF().isPosZero())
14418 return N->getOperand(0);
14419 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(1)))
14420 if (C->getValueAPF().isPosZero())
14421 return N->getOperand(1);
14425 static SDValue PerformBTCombine(SDNode *N,
14427 TargetLowering::DAGCombinerInfo &DCI) {
14428 // BT ignores high bits in the bit index operand.
14429 SDValue Op1 = N->getOperand(1);
14430 if (Op1.hasOneUse()) {
14431 unsigned BitWidth = Op1.getValueSizeInBits();
14432 APInt DemandedMask = APInt::getLowBitsSet(BitWidth, Log2_32(BitWidth));
14433 APInt KnownZero, KnownOne;
14434 TargetLowering::TargetLoweringOpt TLO(DAG, !DCI.isBeforeLegalize(),
14435 !DCI.isBeforeLegalizeOps());
14436 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
14437 if (TLO.ShrinkDemandedConstant(Op1, DemandedMask) ||
14438 TLI.SimplifyDemandedBits(Op1, DemandedMask, KnownZero, KnownOne, TLO))
14439 DCI.CommitTargetLoweringOpt(TLO);
14444 static SDValue PerformVZEXT_MOVLCombine(SDNode *N, SelectionDAG &DAG) {
14445 SDValue Op = N->getOperand(0);
14446 if (Op.getOpcode() == ISD::BITCAST)
14447 Op = Op.getOperand(0);
14448 EVT VT = N->getValueType(0), OpVT = Op.getValueType();
14449 if (Op.getOpcode() == X86ISD::VZEXT_LOAD &&
14450 VT.getVectorElementType().getSizeInBits() ==
14451 OpVT.getVectorElementType().getSizeInBits()) {
14452 return DAG.getNode(ISD::BITCAST, N->getDebugLoc(), VT, Op);
14457 static SDValue PerformZExtCombine(SDNode *N, SelectionDAG &DAG) {
14458 // (i32 zext (and (i8 x86isd::setcc_carry), 1)) ->
14459 // (and (i32 x86isd::setcc_carry), 1)
14460 // This eliminates the zext. This transformation is necessary because
14461 // ISD::SETCC is always legalized to i8.
14462 DebugLoc dl = N->getDebugLoc();
14463 SDValue N0 = N->getOperand(0);
14464 EVT VT = N->getValueType(0);
14465 if (N0.getOpcode() == ISD::AND &&
14467 N0.getOperand(0).hasOneUse()) {
14468 SDValue N00 = N0.getOperand(0);
14469 if (N00.getOpcode() != X86ISD::SETCC_CARRY)
14471 ConstantSDNode *C = dyn_cast<ConstantSDNode>(N0.getOperand(1));
14472 if (!C || C->getZExtValue() != 1)
14474 return DAG.getNode(ISD::AND, dl, VT,
14475 DAG.getNode(X86ISD::SETCC_CARRY, dl, VT,
14476 N00.getOperand(0), N00.getOperand(1)),
14477 DAG.getConstant(1, VT));
14483 // Optimize RES = X86ISD::SETCC CONDCODE, EFLAG_INPUT
14484 static SDValue PerformSETCCCombine(SDNode *N, SelectionDAG &DAG) {
14485 unsigned X86CC = N->getConstantOperandVal(0);
14486 SDValue EFLAG = N->getOperand(1);
14487 DebugLoc DL = N->getDebugLoc();
14489 // Materialize "setb reg" as "sbb reg,reg", since it can be extended without
14490 // a zext and produces an all-ones bit which is more useful than 0/1 in some
14492 if (X86CC == X86::COND_B)
14493 return DAG.getNode(ISD::AND, DL, MVT::i8,
14494 DAG.getNode(X86ISD::SETCC_CARRY, DL, MVT::i8,
14495 DAG.getConstant(X86CC, MVT::i8), EFLAG),
14496 DAG.getConstant(1, MVT::i8));
14501 static SDValue PerformSINT_TO_FPCombine(SDNode *N, SelectionDAG &DAG,
14502 const X86TargetLowering *XTLI) {
14503 SDValue Op0 = N->getOperand(0);
14504 // Transform (SINT_TO_FP (i64 ...)) into an x87 operation if we have
14505 // a 32-bit target where SSE doesn't support i64->FP operations.
14506 if (Op0.getOpcode() == ISD::LOAD) {
14507 LoadSDNode *Ld = cast<LoadSDNode>(Op0.getNode());
14508 EVT VT = Ld->getValueType(0);
14509 if (!Ld->isVolatile() && !N->getValueType(0).isVector() &&
14510 ISD::isNON_EXTLoad(Op0.getNode()) && Op0.hasOneUse() &&
14511 !XTLI->getSubtarget()->is64Bit() &&
14512 !DAG.getTargetLoweringInfo().isTypeLegal(VT)) {
14513 SDValue FILDChain = XTLI->BuildFILD(SDValue(N, 0), Ld->getValueType(0),
14514 Ld->getChain(), Op0, DAG);
14515 DAG.ReplaceAllUsesOfValueWith(Op0.getValue(1), FILDChain.getValue(1));
14522 // Optimize RES, EFLAGS = X86ISD::ADC LHS, RHS, EFLAGS
14523 static SDValue PerformADCCombine(SDNode *N, SelectionDAG &DAG,
14524 X86TargetLowering::DAGCombinerInfo &DCI) {
14525 // If the LHS and RHS of the ADC node are zero, then it can't overflow and
14526 // the result is either zero or one (depending on the input carry bit).
14527 // Strength reduce this down to a "set on carry" aka SETCC_CARRY&1.
14528 if (X86::isZeroNode(N->getOperand(0)) &&
14529 X86::isZeroNode(N->getOperand(1)) &&
14530 // We don't have a good way to replace an EFLAGS use, so only do this when
14532 SDValue(N, 1).use_empty()) {
14533 DebugLoc DL = N->getDebugLoc();
14534 EVT VT = N->getValueType(0);
14535 SDValue CarryOut = DAG.getConstant(0, N->getValueType(1));
14536 SDValue Res1 = DAG.getNode(ISD::AND, DL, VT,
14537 DAG.getNode(X86ISD::SETCC_CARRY, DL, VT,
14538 DAG.getConstant(X86::COND_B,MVT::i8),
14540 DAG.getConstant(1, VT));
14541 return DCI.CombineTo(N, Res1, CarryOut);
14547 // fold (add Y, (sete X, 0)) -> adc 0, Y
14548 // (add Y, (setne X, 0)) -> sbb -1, Y
14549 // (sub (sete X, 0), Y) -> sbb 0, Y
14550 // (sub (setne X, 0), Y) -> adc -1, Y
14551 static SDValue OptimizeConditionalInDecrement(SDNode *N, SelectionDAG &DAG) {
14552 DebugLoc DL = N->getDebugLoc();
14554 // Look through ZExts.
14555 SDValue Ext = N->getOperand(N->getOpcode() == ISD::SUB ? 1 : 0);
14556 if (Ext.getOpcode() != ISD::ZERO_EXTEND || !Ext.hasOneUse())
14559 SDValue SetCC = Ext.getOperand(0);
14560 if (SetCC.getOpcode() != X86ISD::SETCC || !SetCC.hasOneUse())
14563 X86::CondCode CC = (X86::CondCode)SetCC.getConstantOperandVal(0);
14564 if (CC != X86::COND_E && CC != X86::COND_NE)
14567 SDValue Cmp = SetCC.getOperand(1);
14568 if (Cmp.getOpcode() != X86ISD::CMP || !Cmp.hasOneUse() ||
14569 !X86::isZeroNode(Cmp.getOperand(1)) ||
14570 !Cmp.getOperand(0).getValueType().isInteger())
14573 SDValue CmpOp0 = Cmp.getOperand(0);
14574 SDValue NewCmp = DAG.getNode(X86ISD::CMP, DL, MVT::i32, CmpOp0,
14575 DAG.getConstant(1, CmpOp0.getValueType()));
14577 SDValue OtherVal = N->getOperand(N->getOpcode() == ISD::SUB ? 0 : 1);
14578 if (CC == X86::COND_NE)
14579 return DAG.getNode(N->getOpcode() == ISD::SUB ? X86ISD::ADC : X86ISD::SBB,
14580 DL, OtherVal.getValueType(), OtherVal,
14581 DAG.getConstant(-1ULL, OtherVal.getValueType()), NewCmp);
14582 return DAG.getNode(N->getOpcode() == ISD::SUB ? X86ISD::SBB : X86ISD::ADC,
14583 DL, OtherVal.getValueType(), OtherVal,
14584 DAG.getConstant(0, OtherVal.getValueType()), NewCmp);
14587 /// PerformADDCombine - Do target-specific dag combines on integer adds.
14588 static SDValue PerformAddCombine(SDNode *N, SelectionDAG &DAG,
14589 const X86Subtarget *Subtarget) {
14590 EVT VT = N->getValueType(0);
14591 SDValue Op0 = N->getOperand(0);
14592 SDValue Op1 = N->getOperand(1);
14594 // Try to synthesize horizontal adds from adds of shuffles.
14595 if (((Subtarget->hasSSSE3() && (VT == MVT::v8i16 || VT == MVT::v4i32)) ||
14596 (Subtarget->hasAVX2() && (VT == MVT::v16i16 || VT == MVT::v8i32))) &&
14597 isHorizontalBinOp(Op0, Op1, true))
14598 return DAG.getNode(X86ISD::HADD, N->getDebugLoc(), VT, Op0, Op1);
14600 return OptimizeConditionalInDecrement(N, DAG);
14603 static SDValue PerformSubCombine(SDNode *N, SelectionDAG &DAG,
14604 const X86Subtarget *Subtarget) {
14605 SDValue Op0 = N->getOperand(0);
14606 SDValue Op1 = N->getOperand(1);
14608 // X86 can't encode an immediate LHS of a sub. See if we can push the
14609 // negation into a preceding instruction.
14610 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op0)) {
14611 // If the RHS of the sub is a XOR with one use and a constant, invert the
14612 // immediate. Then add one to the LHS of the sub so we can turn
14613 // X-Y -> X+~Y+1, saving one register.
14614 if (Op1->hasOneUse() && Op1.getOpcode() == ISD::XOR &&
14615 isa<ConstantSDNode>(Op1.getOperand(1))) {
14616 APInt XorC = cast<ConstantSDNode>(Op1.getOperand(1))->getAPIntValue();
14617 EVT VT = Op0.getValueType();
14618 SDValue NewXor = DAG.getNode(ISD::XOR, Op1.getDebugLoc(), VT,
14620 DAG.getConstant(~XorC, VT));
14621 return DAG.getNode(ISD::ADD, N->getDebugLoc(), VT, NewXor,
14622 DAG.getConstant(C->getAPIntValue()+1, VT));
14626 // Try to synthesize horizontal adds from adds of shuffles.
14627 EVT VT = N->getValueType(0);
14628 if (((Subtarget->hasSSSE3() && (VT == MVT::v8i16 || VT == MVT::v4i32)) ||
14629 (Subtarget->hasAVX2() && (VT == MVT::v16i16 || VT == MVT::v8i32))) &&
14630 isHorizontalBinOp(Op0, Op1, true))
14631 return DAG.getNode(X86ISD::HSUB, N->getDebugLoc(), VT, Op0, Op1);
14633 return OptimizeConditionalInDecrement(N, DAG);
14636 SDValue X86TargetLowering::PerformDAGCombine(SDNode *N,
14637 DAGCombinerInfo &DCI) const {
14638 SelectionDAG &DAG = DCI.DAG;
14639 switch (N->getOpcode()) {
14641 case ISD::EXTRACT_VECTOR_ELT:
14642 return PerformEXTRACT_VECTOR_ELTCombine(N, DAG, *this);
14644 case ISD::SELECT: return PerformSELECTCombine(N, DAG, DCI, Subtarget);
14645 case X86ISD::CMOV: return PerformCMOVCombine(N, DAG, DCI);
14646 case ISD::ADD: return PerformAddCombine(N, DAG, Subtarget);
14647 case ISD::SUB: return PerformSubCombine(N, DAG, Subtarget);
14648 case X86ISD::ADC: return PerformADCCombine(N, DAG, DCI);
14649 case ISD::MUL: return PerformMulCombine(N, DAG, DCI);
14652 case ISD::SRL: return PerformShiftCombine(N, DAG, Subtarget);
14653 case ISD::AND: return PerformAndCombine(N, DAG, DCI, Subtarget);
14654 case ISD::OR: return PerformOrCombine(N, DAG, DCI, Subtarget);
14655 case ISD::XOR: return PerformXorCombine(N, DAG, DCI, Subtarget);
14656 case ISD::LOAD: return PerformLOADCombine(N, DAG, Subtarget);
14657 case ISD::STORE: return PerformSTORECombine(N, DAG, Subtarget);
14658 case ISD::SINT_TO_FP: return PerformSINT_TO_FPCombine(N, DAG, this);
14659 case ISD::FADD: return PerformFADDCombine(N, DAG, Subtarget);
14660 case ISD::FSUB: return PerformFSUBCombine(N, DAG, Subtarget);
14662 case X86ISD::FOR: return PerformFORCombine(N, DAG);
14663 case X86ISD::FAND: return PerformFANDCombine(N, DAG);
14664 case X86ISD::BT: return PerformBTCombine(N, DAG, DCI);
14665 case X86ISD::VZEXT_MOVL: return PerformVZEXT_MOVLCombine(N, DAG);
14666 case ISD::ZERO_EXTEND: return PerformZExtCombine(N, DAG);
14667 case X86ISD::SETCC: return PerformSETCCCombine(N, DAG);
14668 case X86ISD::SHUFP: // Handle all target specific shuffles
14669 case X86ISD::PALIGN:
14670 case X86ISD::UNPCKH:
14671 case X86ISD::UNPCKL:
14672 case X86ISD::MOVHLPS:
14673 case X86ISD::MOVLHPS:
14674 case X86ISD::PSHUFD:
14675 case X86ISD::PSHUFHW:
14676 case X86ISD::PSHUFLW:
14677 case X86ISD::MOVSS:
14678 case X86ISD::MOVSD:
14679 case X86ISD::VPERMILP:
14680 case X86ISD::VPERM2X128:
14681 case ISD::VECTOR_SHUFFLE: return PerformShuffleCombine(N, DAG, DCI,Subtarget);
14687 /// isTypeDesirableForOp - Return true if the target has native support for
14688 /// the specified value type and it is 'desirable' to use the type for the
14689 /// given node type. e.g. On x86 i16 is legal, but undesirable since i16
14690 /// instruction encodings are longer and some i16 instructions are slow.
14691 bool X86TargetLowering::isTypeDesirableForOp(unsigned Opc, EVT VT) const {
14692 if (!isTypeLegal(VT))
14694 if (VT != MVT::i16)
14701 case ISD::SIGN_EXTEND:
14702 case ISD::ZERO_EXTEND:
14703 case ISD::ANY_EXTEND:
14716 /// IsDesirableToPromoteOp - This method query the target whether it is
14717 /// beneficial for dag combiner to promote the specified node. If true, it
14718 /// should return the desired promotion type by reference.
14719 bool X86TargetLowering::IsDesirableToPromoteOp(SDValue Op, EVT &PVT) const {
14720 EVT VT = Op.getValueType();
14721 if (VT != MVT::i16)
14724 bool Promote = false;
14725 bool Commute = false;
14726 switch (Op.getOpcode()) {
14729 LoadSDNode *LD = cast<LoadSDNode>(Op);
14730 // If the non-extending load has a single use and it's not live out, then it
14731 // might be folded.
14732 if (LD->getExtensionType() == ISD::NON_EXTLOAD /*&&
14733 Op.hasOneUse()*/) {
14734 for (SDNode::use_iterator UI = Op.getNode()->use_begin(),
14735 UE = Op.getNode()->use_end(); UI != UE; ++UI) {
14736 // The only case where we'd want to promote LOAD (rather then it being
14737 // promoted as an operand is when it's only use is liveout.
14738 if (UI->getOpcode() != ISD::CopyToReg)
14745 case ISD::SIGN_EXTEND:
14746 case ISD::ZERO_EXTEND:
14747 case ISD::ANY_EXTEND:
14752 SDValue N0 = Op.getOperand(0);
14753 // Look out for (store (shl (load), x)).
14754 if (MayFoldLoad(N0) && MayFoldIntoStore(Op))
14767 SDValue N0 = Op.getOperand(0);
14768 SDValue N1 = Op.getOperand(1);
14769 if (!Commute && MayFoldLoad(N1))
14771 // Avoid disabling potential load folding opportunities.
14772 if (MayFoldLoad(N0) && (!isa<ConstantSDNode>(N1) || MayFoldIntoStore(Op)))
14774 if (MayFoldLoad(N1) && (!isa<ConstantSDNode>(N0) || MayFoldIntoStore(Op)))
14784 //===----------------------------------------------------------------------===//
14785 // X86 Inline Assembly Support
14786 //===----------------------------------------------------------------------===//
14789 // Helper to match a string separated by whitespace.
14790 bool matchAsmImpl(StringRef s, ArrayRef<const StringRef *> args) {
14791 s = s.substr(s.find_first_not_of(" \t")); // Skip leading whitespace.
14793 for (unsigned i = 0, e = args.size(); i != e; ++i) {
14794 StringRef piece(*args[i]);
14795 if (!s.startswith(piece)) // Check if the piece matches.
14798 s = s.substr(piece.size());
14799 StringRef::size_type pos = s.find_first_not_of(" \t");
14800 if (pos == 0) // We matched a prefix.
14808 const VariadicFunction1<bool, StringRef, StringRef, matchAsmImpl> matchAsm={};
14811 bool X86TargetLowering::ExpandInlineAsm(CallInst *CI) const {
14812 InlineAsm *IA = cast<InlineAsm>(CI->getCalledValue());
14814 std::string AsmStr = IA->getAsmString();
14816 IntegerType *Ty = dyn_cast<IntegerType>(CI->getType());
14817 if (!Ty || Ty->getBitWidth() % 16 != 0)
14820 // TODO: should remove alternatives from the asmstring: "foo {a|b}" -> "foo a"
14821 SmallVector<StringRef, 4> AsmPieces;
14822 SplitString(AsmStr, AsmPieces, ";\n");
14824 switch (AsmPieces.size()) {
14825 default: return false;
14827 // FIXME: this should verify that we are targeting a 486 or better. If not,
14828 // we will turn this bswap into something that will be lowered to logical
14829 // ops instead of emitting the bswap asm. For now, we don't support 486 or
14830 // lower so don't worry about this.
14832 if (matchAsm(AsmPieces[0], "bswap", "$0") ||
14833 matchAsm(AsmPieces[0], "bswapl", "$0") ||
14834 matchAsm(AsmPieces[0], "bswapq", "$0") ||
14835 matchAsm(AsmPieces[0], "bswap", "${0:q}") ||
14836 matchAsm(AsmPieces[0], "bswapl", "${0:q}") ||
14837 matchAsm(AsmPieces[0], "bswapq", "${0:q}")) {
14838 // No need to check constraints, nothing other than the equivalent of
14839 // "=r,0" would be valid here.
14840 return IntrinsicLowering::LowerToByteSwap(CI);
14843 // rorw $$8, ${0:w} --> llvm.bswap.i16
14844 if (CI->getType()->isIntegerTy(16) &&
14845 IA->getConstraintString().compare(0, 5, "=r,0,") == 0 &&
14846 (matchAsm(AsmPieces[0], "rorw", "$$8,", "${0:w}") ||
14847 matchAsm(AsmPieces[0], "rolw", "$$8,", "${0:w}"))) {
14849 const std::string &ConstraintsStr = IA->getConstraintString();
14850 SplitString(StringRef(ConstraintsStr).substr(5), AsmPieces, ",");
14851 std::sort(AsmPieces.begin(), AsmPieces.end());
14852 if (AsmPieces.size() == 4 &&
14853 AsmPieces[0] == "~{cc}" &&
14854 AsmPieces[1] == "~{dirflag}" &&
14855 AsmPieces[2] == "~{flags}" &&
14856 AsmPieces[3] == "~{fpsr}")
14857 return IntrinsicLowering::LowerToByteSwap(CI);
14861 if (CI->getType()->isIntegerTy(32) &&
14862 IA->getConstraintString().compare(0, 5, "=r,0,") == 0 &&
14863 matchAsm(AsmPieces[0], "rorw", "$$8,", "${0:w}") &&
14864 matchAsm(AsmPieces[1], "rorl", "$$16,", "$0") &&
14865 matchAsm(AsmPieces[2], "rorw", "$$8,", "${0:w}")) {
14867 const std::string &ConstraintsStr = IA->getConstraintString();
14868 SplitString(StringRef(ConstraintsStr).substr(5), AsmPieces, ",");
14869 std::sort(AsmPieces.begin(), AsmPieces.end());
14870 if (AsmPieces.size() == 4 &&
14871 AsmPieces[0] == "~{cc}" &&
14872 AsmPieces[1] == "~{dirflag}" &&
14873 AsmPieces[2] == "~{flags}" &&
14874 AsmPieces[3] == "~{fpsr}")
14875 return IntrinsicLowering::LowerToByteSwap(CI);
14878 if (CI->getType()->isIntegerTy(64)) {
14879 InlineAsm::ConstraintInfoVector Constraints = IA->ParseConstraints();
14880 if (Constraints.size() >= 2 &&
14881 Constraints[0].Codes.size() == 1 && Constraints[0].Codes[0] == "A" &&
14882 Constraints[1].Codes.size() == 1 && Constraints[1].Codes[0] == "0") {
14883 // bswap %eax / bswap %edx / xchgl %eax, %edx -> llvm.bswap.i64
14884 if (matchAsm(AsmPieces[0], "bswap", "%eax") &&
14885 matchAsm(AsmPieces[1], "bswap", "%edx") &&
14886 matchAsm(AsmPieces[2], "xchgl", "%eax,", "%edx"))
14887 return IntrinsicLowering::LowerToByteSwap(CI);
14897 /// getConstraintType - Given a constraint letter, return the type of
14898 /// constraint it is for this target.
14899 X86TargetLowering::ConstraintType
14900 X86TargetLowering::getConstraintType(const std::string &Constraint) const {
14901 if (Constraint.size() == 1) {
14902 switch (Constraint[0]) {
14913 return C_RegisterClass;
14937 return TargetLowering::getConstraintType(Constraint);
14940 /// Examine constraint type and operand type and determine a weight value.
14941 /// This object must already have been set up with the operand type
14942 /// and the current alternative constraint selected.
14943 TargetLowering::ConstraintWeight
14944 X86TargetLowering::getSingleConstraintMatchWeight(
14945 AsmOperandInfo &info, const char *constraint) const {
14946 ConstraintWeight weight = CW_Invalid;
14947 Value *CallOperandVal = info.CallOperandVal;
14948 // If we don't have a value, we can't do a match,
14949 // but allow it at the lowest weight.
14950 if (CallOperandVal == NULL)
14952 Type *type = CallOperandVal->getType();
14953 // Look at the constraint type.
14954 switch (*constraint) {
14956 weight = TargetLowering::getSingleConstraintMatchWeight(info, constraint);
14967 if (CallOperandVal->getType()->isIntegerTy())
14968 weight = CW_SpecificReg;
14973 if (type->isFloatingPointTy())
14974 weight = CW_SpecificReg;
14977 if (type->isX86_MMXTy() && Subtarget->hasMMX())
14978 weight = CW_SpecificReg;
14982 if (((type->getPrimitiveSizeInBits() == 128) && Subtarget->hasSSE1()) ||
14983 ((type->getPrimitiveSizeInBits() == 256) && Subtarget->hasAVX()))
14984 weight = CW_Register;
14987 if (ConstantInt *C = dyn_cast<ConstantInt>(info.CallOperandVal)) {
14988 if (C->getZExtValue() <= 31)
14989 weight = CW_Constant;
14993 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
14994 if (C->getZExtValue() <= 63)
14995 weight = CW_Constant;
14999 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
15000 if ((C->getSExtValue() >= -0x80) && (C->getSExtValue() <= 0x7f))
15001 weight = CW_Constant;
15005 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
15006 if ((C->getZExtValue() == 0xff) || (C->getZExtValue() == 0xffff))
15007 weight = CW_Constant;
15011 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
15012 if (C->getZExtValue() <= 3)
15013 weight = CW_Constant;
15017 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
15018 if (C->getZExtValue() <= 0xff)
15019 weight = CW_Constant;
15024 if (dyn_cast<ConstantFP>(CallOperandVal)) {
15025 weight = CW_Constant;
15029 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
15030 if ((C->getSExtValue() >= -0x80000000LL) &&
15031 (C->getSExtValue() <= 0x7fffffffLL))
15032 weight = CW_Constant;
15036 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
15037 if (C->getZExtValue() <= 0xffffffff)
15038 weight = CW_Constant;
15045 /// LowerXConstraint - try to replace an X constraint, which matches anything,
15046 /// with another that has more specific requirements based on the type of the
15047 /// corresponding operand.
15048 const char *X86TargetLowering::
15049 LowerXConstraint(EVT ConstraintVT) const {
15050 // FP X constraints get lowered to SSE1/2 registers if available, otherwise
15051 // 'f' like normal targets.
15052 if (ConstraintVT.isFloatingPoint()) {
15053 if (Subtarget->hasSSE2())
15055 if (Subtarget->hasSSE1())
15059 return TargetLowering::LowerXConstraint(ConstraintVT);
15062 /// LowerAsmOperandForConstraint - Lower the specified operand into the Ops
15063 /// vector. If it is invalid, don't add anything to Ops.
15064 void X86TargetLowering::LowerAsmOperandForConstraint(SDValue Op,
15065 std::string &Constraint,
15066 std::vector<SDValue>&Ops,
15067 SelectionDAG &DAG) const {
15068 SDValue Result(0, 0);
15070 // Only support length 1 constraints for now.
15071 if (Constraint.length() > 1) return;
15073 char ConstraintLetter = Constraint[0];
15074 switch (ConstraintLetter) {
15077 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
15078 if (C->getZExtValue() <= 31) {
15079 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
15085 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
15086 if (C->getZExtValue() <= 63) {
15087 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
15093 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
15094 if ((int8_t)C->getSExtValue() == C->getSExtValue()) {
15095 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
15101 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
15102 if (C->getZExtValue() <= 255) {
15103 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
15109 // 32-bit signed value
15110 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
15111 if (ConstantInt::isValueValidForType(Type::getInt32Ty(*DAG.getContext()),
15112 C->getSExtValue())) {
15113 // Widen to 64 bits here to get it sign extended.
15114 Result = DAG.getTargetConstant(C->getSExtValue(), MVT::i64);
15117 // FIXME gcc accepts some relocatable values here too, but only in certain
15118 // memory models; it's complicated.
15123 // 32-bit unsigned value
15124 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
15125 if (ConstantInt::isValueValidForType(Type::getInt32Ty(*DAG.getContext()),
15126 C->getZExtValue())) {
15127 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
15131 // FIXME gcc accepts some relocatable values here too, but only in certain
15132 // memory models; it's complicated.
15136 // Literal immediates are always ok.
15137 if (ConstantSDNode *CST = dyn_cast<ConstantSDNode>(Op)) {
15138 // Widen to 64 bits here to get it sign extended.
15139 Result = DAG.getTargetConstant(CST->getSExtValue(), MVT::i64);
15143 // In any sort of PIC mode addresses need to be computed at runtime by
15144 // adding in a register or some sort of table lookup. These can't
15145 // be used as immediates.
15146 if (Subtarget->isPICStyleGOT() || Subtarget->isPICStyleStubPIC())
15149 // If we are in non-pic codegen mode, we allow the address of a global (with
15150 // an optional displacement) to be used with 'i'.
15151 GlobalAddressSDNode *GA = 0;
15152 int64_t Offset = 0;
15154 // Match either (GA), (GA+C), (GA+C1+C2), etc.
15156 if ((GA = dyn_cast<GlobalAddressSDNode>(Op))) {
15157 Offset += GA->getOffset();
15159 } else if (Op.getOpcode() == ISD::ADD) {
15160 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op.getOperand(1))) {
15161 Offset += C->getZExtValue();
15162 Op = Op.getOperand(0);
15165 } else if (Op.getOpcode() == ISD::SUB) {
15166 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op.getOperand(1))) {
15167 Offset += -C->getZExtValue();
15168 Op = Op.getOperand(0);
15173 // Otherwise, this isn't something we can handle, reject it.
15177 const GlobalValue *GV = GA->getGlobal();
15178 // If we require an extra load to get this address, as in PIC mode, we
15179 // can't accept it.
15180 if (isGlobalStubReference(Subtarget->ClassifyGlobalReference(GV,
15181 getTargetMachine())))
15184 Result = DAG.getTargetGlobalAddress(GV, Op.getDebugLoc(),
15185 GA->getValueType(0), Offset);
15190 if (Result.getNode()) {
15191 Ops.push_back(Result);
15194 return TargetLowering::LowerAsmOperandForConstraint(Op, Constraint, Ops, DAG);
15197 std::pair<unsigned, const TargetRegisterClass*>
15198 X86TargetLowering::getRegForInlineAsmConstraint(const std::string &Constraint,
15200 // First, see if this is a constraint that directly corresponds to an LLVM
15202 if (Constraint.size() == 1) {
15203 // GCC Constraint Letters
15204 switch (Constraint[0]) {
15206 // TODO: Slight differences here in allocation order and leaving
15207 // RIP in the class. Do they matter any more here than they do
15208 // in the normal allocation?
15209 case 'q': // GENERAL_REGS in 64-bit mode, Q_REGS in 32-bit mode.
15210 if (Subtarget->is64Bit()) {
15211 if (VT == MVT::i32 || VT == MVT::f32)
15212 return std::make_pair(0U, X86::GR32RegisterClass);
15213 else if (VT == MVT::i16)
15214 return std::make_pair(0U, X86::GR16RegisterClass);
15215 else if (VT == MVT::i8 || VT == MVT::i1)
15216 return std::make_pair(0U, X86::GR8RegisterClass);
15217 else if (VT == MVT::i64 || VT == MVT::f64)
15218 return std::make_pair(0U, X86::GR64RegisterClass);
15221 // 32-bit fallthrough
15222 case 'Q': // Q_REGS
15223 if (VT == MVT::i32 || VT == MVT::f32)
15224 return std::make_pair(0U, X86::GR32_ABCDRegisterClass);
15225 else if (VT == MVT::i16)
15226 return std::make_pair(0U, X86::GR16_ABCDRegisterClass);
15227 else if (VT == MVT::i8 || VT == MVT::i1)
15228 return std::make_pair(0U, X86::GR8_ABCD_LRegisterClass);
15229 else if (VT == MVT::i64)
15230 return std::make_pair(0U, X86::GR64_ABCDRegisterClass);
15232 case 'r': // GENERAL_REGS
15233 case 'l': // INDEX_REGS
15234 if (VT == MVT::i8 || VT == MVT::i1)
15235 return std::make_pair(0U, X86::GR8RegisterClass);
15236 if (VT == MVT::i16)
15237 return std::make_pair(0U, X86::GR16RegisterClass);
15238 if (VT == MVT::i32 || VT == MVT::f32 || !Subtarget->is64Bit())
15239 return std::make_pair(0U, X86::GR32RegisterClass);
15240 return std::make_pair(0U, X86::GR64RegisterClass);
15241 case 'R': // LEGACY_REGS
15242 if (VT == MVT::i8 || VT == MVT::i1)
15243 return std::make_pair(0U, X86::GR8_NOREXRegisterClass);
15244 if (VT == MVT::i16)
15245 return std::make_pair(0U, X86::GR16_NOREXRegisterClass);
15246 if (VT == MVT::i32 || !Subtarget->is64Bit())
15247 return std::make_pair(0U, X86::GR32_NOREXRegisterClass);
15248 return std::make_pair(0U, X86::GR64_NOREXRegisterClass);
15249 case 'f': // FP Stack registers.
15250 // If SSE is enabled for this VT, use f80 to ensure the isel moves the
15251 // value to the correct fpstack register class.
15252 if (VT == MVT::f32 && !isScalarFPTypeInSSEReg(VT))
15253 return std::make_pair(0U, X86::RFP32RegisterClass);
15254 if (VT == MVT::f64 && !isScalarFPTypeInSSEReg(VT))
15255 return std::make_pair(0U, X86::RFP64RegisterClass);
15256 return std::make_pair(0U, X86::RFP80RegisterClass);
15257 case 'y': // MMX_REGS if MMX allowed.
15258 if (!Subtarget->hasMMX()) break;
15259 return std::make_pair(0U, X86::VR64RegisterClass);
15260 case 'Y': // SSE_REGS if SSE2 allowed
15261 if (!Subtarget->hasSSE2()) break;
15263 case 'x': // SSE_REGS if SSE1 allowed or AVX_REGS if AVX allowed
15264 if (!Subtarget->hasSSE1()) break;
15266 switch (VT.getSimpleVT().SimpleTy) {
15268 // Scalar SSE types.
15271 return std::make_pair(0U, X86::FR32RegisterClass);
15274 return std::make_pair(0U, X86::FR64RegisterClass);
15282 return std::make_pair(0U, X86::VR128RegisterClass);
15290 return std::make_pair(0U, X86::VR256RegisterClass);
15297 // Use the default implementation in TargetLowering to convert the register
15298 // constraint into a member of a register class.
15299 std::pair<unsigned, const TargetRegisterClass*> Res;
15300 Res = TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
15302 // Not found as a standard register?
15303 if (Res.second == 0) {
15304 // Map st(0) -> st(7) -> ST0
15305 if (Constraint.size() == 7 && Constraint[0] == '{' &&
15306 tolower(Constraint[1]) == 's' &&
15307 tolower(Constraint[2]) == 't' &&
15308 Constraint[3] == '(' &&
15309 (Constraint[4] >= '0' && Constraint[4] <= '7') &&
15310 Constraint[5] == ')' &&
15311 Constraint[6] == '}') {
15313 Res.first = X86::ST0+Constraint[4]-'0';
15314 Res.second = X86::RFP80RegisterClass;
15318 // GCC allows "st(0)" to be called just plain "st".
15319 if (StringRef("{st}").equals_lower(Constraint)) {
15320 Res.first = X86::ST0;
15321 Res.second = X86::RFP80RegisterClass;
15326 if (StringRef("{flags}").equals_lower(Constraint)) {
15327 Res.first = X86::EFLAGS;
15328 Res.second = X86::CCRRegisterClass;
15332 // 'A' means EAX + EDX.
15333 if (Constraint == "A") {
15334 Res.first = X86::EAX;
15335 Res.second = X86::GR32_ADRegisterClass;
15341 // Otherwise, check to see if this is a register class of the wrong value
15342 // type. For example, we want to map "{ax},i32" -> {eax}, we don't want it to
15343 // turn into {ax},{dx}.
15344 if (Res.second->hasType(VT))
15345 return Res; // Correct type already, nothing to do.
15347 // All of the single-register GCC register classes map their values onto
15348 // 16-bit register pieces "ax","dx","cx","bx","si","di","bp","sp". If we
15349 // really want an 8-bit or 32-bit register, map to the appropriate register
15350 // class and return the appropriate register.
15351 if (Res.second == X86::GR16RegisterClass) {
15352 if (VT == MVT::i8) {
15353 unsigned DestReg = 0;
15354 switch (Res.first) {
15356 case X86::AX: DestReg = X86::AL; break;
15357 case X86::DX: DestReg = X86::DL; break;
15358 case X86::CX: DestReg = X86::CL; break;
15359 case X86::BX: DestReg = X86::BL; break;
15362 Res.first = DestReg;
15363 Res.second = X86::GR8RegisterClass;
15365 } else if (VT == MVT::i32) {
15366 unsigned DestReg = 0;
15367 switch (Res.first) {
15369 case X86::AX: DestReg = X86::EAX; break;
15370 case X86::DX: DestReg = X86::EDX; break;
15371 case X86::CX: DestReg = X86::ECX; break;
15372 case X86::BX: DestReg = X86::EBX; break;
15373 case X86::SI: DestReg = X86::ESI; break;
15374 case X86::DI: DestReg = X86::EDI; break;
15375 case X86::BP: DestReg = X86::EBP; break;
15376 case X86::SP: DestReg = X86::ESP; break;
15379 Res.first = DestReg;
15380 Res.second = X86::GR32RegisterClass;
15382 } else if (VT == MVT::i64) {
15383 unsigned DestReg = 0;
15384 switch (Res.first) {
15386 case X86::AX: DestReg = X86::RAX; break;
15387 case X86::DX: DestReg = X86::RDX; break;
15388 case X86::CX: DestReg = X86::RCX; break;
15389 case X86::BX: DestReg = X86::RBX; break;
15390 case X86::SI: DestReg = X86::RSI; break;
15391 case X86::DI: DestReg = X86::RDI; break;
15392 case X86::BP: DestReg = X86::RBP; break;
15393 case X86::SP: DestReg = X86::RSP; break;
15396 Res.first = DestReg;
15397 Res.second = X86::GR64RegisterClass;
15400 } else if (Res.second == X86::FR32RegisterClass ||
15401 Res.second == X86::FR64RegisterClass ||
15402 Res.second == X86::VR128RegisterClass) {
15403 // Handle references to XMM physical registers that got mapped into the
15404 // wrong class. This can happen with constraints like {xmm0} where the
15405 // target independent register mapper will just pick the first match it can
15406 // find, ignoring the required type.
15407 if (VT == MVT::f32)
15408 Res.second = X86::FR32RegisterClass;
15409 else if (VT == MVT::f64)
15410 Res.second = X86::FR64RegisterClass;
15411 else if (X86::VR128RegisterClass->hasType(VT))
15412 Res.second = X86::VR128RegisterClass;