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/CodeGen/PseudoSourceValue.h"
39 #include "llvm/MC/MCAsmInfo.h"
40 #include "llvm/MC/MCContext.h"
41 #include "llvm/MC/MCExpr.h"
42 #include "llvm/MC/MCSymbol.h"
43 #include "llvm/ADT/BitVector.h"
44 #include "llvm/ADT/SmallSet.h"
45 #include "llvm/ADT/Statistic.h"
46 #include "llvm/ADT/StringExtras.h"
47 #include "llvm/ADT/VectorExtras.h"
48 #include "llvm/Support/CallSite.h"
49 #include "llvm/Support/Debug.h"
50 #include "llvm/Support/Dwarf.h"
51 #include "llvm/Support/ErrorHandling.h"
52 #include "llvm/Support/MathExtras.h"
53 #include "llvm/Support/raw_ostream.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 static SDValue ConcatVectors(SDValue Lower, SDValue Upper, SelectionDAG &DAG);
77 /// Generate a DAG to grab 128-bits from a vector > 128 bits. This
78 /// sets things up to match to an AVX VEXTRACTF128 instruction or a
79 /// simple subregister reference. Idx is an index in the 128 bits we
80 /// want. It need not be aligned to a 128-bit bounday. That makes
81 /// lowering EXTRACT_VECTOR_ELT operations easier.
82 static SDValue Extract128BitVector(SDValue Vec,
86 EVT VT = Vec.getValueType();
87 assert(VT.getSizeInBits() == 256 && "Unexpected vector size!");
89 EVT ElVT = VT.getVectorElementType();
91 int Factor = VT.getSizeInBits() / 128;
93 EVT ResultVT = EVT::getVectorVT(*DAG.getContext(),
95 VT.getVectorNumElements() / Factor);
97 // Extract from UNDEF is UNDEF.
98 if (Vec.getOpcode() == ISD::UNDEF)
99 return DAG.getNode(ISD::UNDEF, dl, ResultVT);
101 if (isa<ConstantSDNode>(Idx)) {
102 unsigned IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
104 // Extract the relevant 128 bits. Generate an EXTRACT_SUBVECTOR
105 // we can match to VEXTRACTF128.
106 unsigned ElemsPerChunk = 128 / ElVT.getSizeInBits();
108 // This is the index of the first element of the 128-bit chunk
110 unsigned NormalizedIdxVal = (((IdxVal * ElVT.getSizeInBits()) / 128)
113 SDValue VecIdx = DAG.getConstant(NormalizedIdxVal, MVT::i32);
115 SDValue Result = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, ResultVT, Vec,
124 /// Generate a DAG to put 128-bits into a vector > 128 bits. This
125 /// sets things up to match to an AVX VINSERTF128 instruction or a
126 /// simple superregister reference. Idx is an index in the 128 bits
127 /// we want. It need not be aligned to a 128-bit bounday. That makes
128 /// lowering INSERT_VECTOR_ELT operations easier.
129 static SDValue Insert128BitVector(SDValue Result,
134 if (isa<ConstantSDNode>(Idx)) {
135 EVT VT = Vec.getValueType();
136 assert(VT.getSizeInBits() == 128 && "Unexpected vector size!");
138 EVT ElVT = VT.getVectorElementType();
140 unsigned IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
142 EVT ResultVT = Result.getValueType();
144 // Insert the relevant 128 bits.
145 unsigned ElemsPerChunk = 128 / ElVT.getSizeInBits();
147 // This is the index of the first element of the 128-bit chunk
149 unsigned NormalizedIdxVal = (((IdxVal * ElVT.getSizeInBits()) / 128)
152 SDValue VecIdx = DAG.getConstant(NormalizedIdxVal, MVT::i32);
154 Result = DAG.getNode(ISD::INSERT_SUBVECTOR, dl, ResultVT, Result, Vec,
162 /// Given two vectors, concat them.
163 static SDValue ConcatVectors(SDValue Lower, SDValue Upper, SelectionDAG &DAG) {
164 DebugLoc dl = Lower.getDebugLoc();
166 assert(Lower.getValueType() == Upper.getValueType() && "Mismatched vectors!");
168 EVT VT = EVT::getVectorVT(*DAG.getContext(),
169 Lower.getValueType().getVectorElementType(),
170 Lower.getValueType().getVectorNumElements() * 2);
172 // TODO: Generalize to arbitrary vector length (this assumes 256-bit vectors).
173 assert(VT.getSizeInBits() == 256 && "Unsupported vector concat!");
175 // Insert the upper subvector.
176 SDValue Vec = Insert128BitVector(DAG.getNode(ISD::UNDEF, dl, VT), Upper,
178 // This is half the length of the result
179 // vector. Start inserting the upper 128
181 Lower.getValueType().getVectorNumElements(),
185 // Insert the lower subvector.
186 Vec = Insert128BitVector(Vec, Lower, DAG.getConstant(0, MVT::i32), DAG, dl);
190 static TargetLoweringObjectFile *createTLOF(X86TargetMachine &TM) {
191 const X86Subtarget *Subtarget = &TM.getSubtarget<X86Subtarget>();
192 bool is64Bit = Subtarget->is64Bit();
194 if (Subtarget->isTargetEnvMacho()) {
196 return new X8664_MachoTargetObjectFile();
197 return new TargetLoweringObjectFileMachO();
200 if (Subtarget->isTargetELF()) {
202 return new X8664_ELFTargetObjectFile(TM);
203 return new X8632_ELFTargetObjectFile(TM);
205 if (Subtarget->isTargetCOFF() && !Subtarget->isTargetEnvMacho())
206 return new TargetLoweringObjectFileCOFF();
207 llvm_unreachable("unknown subtarget type");
210 X86TargetLowering::X86TargetLowering(X86TargetMachine &TM)
211 : TargetLowering(TM, createTLOF(TM)) {
212 Subtarget = &TM.getSubtarget<X86Subtarget>();
213 X86ScalarSSEf64 = Subtarget->hasXMMInt();
214 X86ScalarSSEf32 = Subtarget->hasXMM();
215 X86StackPtr = Subtarget->is64Bit() ? X86::RSP : X86::ESP;
217 RegInfo = TM.getRegisterInfo();
218 TD = getTargetData();
220 // Set up the TargetLowering object.
221 static MVT IntVTs[] = { MVT::i8, MVT::i16, MVT::i32, MVT::i64 };
223 // X86 is weird, it always uses i8 for shift amounts and setcc results.
224 setBooleanContents(ZeroOrOneBooleanContent);
226 // For 64-bit since we have so many registers use the ILP scheduler, for
227 // 32-bit code use the register pressure specific scheduling.
228 if (Subtarget->is64Bit())
229 setSchedulingPreference(Sched::ILP);
231 setSchedulingPreference(Sched::RegPressure);
232 setStackPointerRegisterToSaveRestore(X86StackPtr);
234 if (Subtarget->isTargetWindows() && !Subtarget->isTargetCygMing()) {
235 // Setup Windows compiler runtime calls.
236 setLibcallName(RTLIB::SDIV_I64, "_alldiv");
237 setLibcallName(RTLIB::UDIV_I64, "_aulldiv");
238 setLibcallName(RTLIB::FPTOUINT_F64_I64, "_ftol2");
239 setLibcallName(RTLIB::FPTOUINT_F32_I64, "_ftol2");
240 setLibcallCallingConv(RTLIB::SDIV_I64, CallingConv::X86_StdCall);
241 setLibcallCallingConv(RTLIB::UDIV_I64, CallingConv::X86_StdCall);
242 setLibcallCallingConv(RTLIB::FPTOUINT_F64_I64, CallingConv::C);
243 setLibcallCallingConv(RTLIB::FPTOUINT_F32_I64, CallingConv::C);
246 if (Subtarget->isTargetDarwin()) {
247 // Darwin should use _setjmp/_longjmp instead of setjmp/longjmp.
248 setUseUnderscoreSetJmp(false);
249 setUseUnderscoreLongJmp(false);
250 } else if (Subtarget->isTargetMingw()) {
251 // MS runtime is weird: it exports _setjmp, but longjmp!
252 setUseUnderscoreSetJmp(true);
253 setUseUnderscoreLongJmp(false);
255 setUseUnderscoreSetJmp(true);
256 setUseUnderscoreLongJmp(true);
259 // Set up the register classes.
260 addRegisterClass(MVT::i8, X86::GR8RegisterClass);
261 addRegisterClass(MVT::i16, X86::GR16RegisterClass);
262 addRegisterClass(MVT::i32, X86::GR32RegisterClass);
263 if (Subtarget->is64Bit())
264 addRegisterClass(MVT::i64, X86::GR64RegisterClass);
266 setLoadExtAction(ISD::SEXTLOAD, MVT::i1, Promote);
268 // We don't accept any truncstore of integer registers.
269 setTruncStoreAction(MVT::i64, MVT::i32, Expand);
270 setTruncStoreAction(MVT::i64, MVT::i16, Expand);
271 setTruncStoreAction(MVT::i64, MVT::i8 , Expand);
272 setTruncStoreAction(MVT::i32, MVT::i16, Expand);
273 setTruncStoreAction(MVT::i32, MVT::i8 , Expand);
274 setTruncStoreAction(MVT::i16, MVT::i8, Expand);
276 // SETOEQ and SETUNE require checking two conditions.
277 setCondCodeAction(ISD::SETOEQ, MVT::f32, Expand);
278 setCondCodeAction(ISD::SETOEQ, MVT::f64, Expand);
279 setCondCodeAction(ISD::SETOEQ, MVT::f80, Expand);
280 setCondCodeAction(ISD::SETUNE, MVT::f32, Expand);
281 setCondCodeAction(ISD::SETUNE, MVT::f64, Expand);
282 setCondCodeAction(ISD::SETUNE, MVT::f80, Expand);
284 // Promote all UINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have this
286 setOperationAction(ISD::UINT_TO_FP , MVT::i1 , Promote);
287 setOperationAction(ISD::UINT_TO_FP , MVT::i8 , Promote);
288 setOperationAction(ISD::UINT_TO_FP , MVT::i16 , Promote);
290 if (Subtarget->is64Bit()) {
291 setOperationAction(ISD::UINT_TO_FP , MVT::i32 , Promote);
292 setOperationAction(ISD::UINT_TO_FP , MVT::i64 , Expand);
293 } else if (!UseSoftFloat) {
294 // We have an algorithm for SSE2->double, and we turn this into a
295 // 64-bit FILD followed by conditional FADD for other targets.
296 setOperationAction(ISD::UINT_TO_FP , MVT::i64 , Custom);
297 // We have an algorithm for SSE2, and we turn this into a 64-bit
298 // FILD for other targets.
299 setOperationAction(ISD::UINT_TO_FP , MVT::i32 , Custom);
302 // Promote i1/i8 SINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have
304 setOperationAction(ISD::SINT_TO_FP , MVT::i1 , Promote);
305 setOperationAction(ISD::SINT_TO_FP , MVT::i8 , Promote);
308 // SSE has no i16 to fp conversion, only i32
309 if (X86ScalarSSEf32) {
310 setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Promote);
311 // f32 and f64 cases are Legal, f80 case is not
312 setOperationAction(ISD::SINT_TO_FP , MVT::i32 , Custom);
314 setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Custom);
315 setOperationAction(ISD::SINT_TO_FP , MVT::i32 , Custom);
318 setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Promote);
319 setOperationAction(ISD::SINT_TO_FP , MVT::i32 , Promote);
322 // In 32-bit mode these are custom lowered. In 64-bit mode F32 and F64
323 // are Legal, f80 is custom lowered.
324 setOperationAction(ISD::FP_TO_SINT , MVT::i64 , Custom);
325 setOperationAction(ISD::SINT_TO_FP , MVT::i64 , Custom);
327 // Promote i1/i8 FP_TO_SINT to larger FP_TO_SINTS's, as X86 doesn't have
329 setOperationAction(ISD::FP_TO_SINT , MVT::i1 , Promote);
330 setOperationAction(ISD::FP_TO_SINT , MVT::i8 , Promote);
332 if (X86ScalarSSEf32) {
333 setOperationAction(ISD::FP_TO_SINT , MVT::i16 , Promote);
334 // f32 and f64 cases are Legal, f80 case is not
335 setOperationAction(ISD::FP_TO_SINT , MVT::i32 , Custom);
337 setOperationAction(ISD::FP_TO_SINT , MVT::i16 , Custom);
338 setOperationAction(ISD::FP_TO_SINT , MVT::i32 , Custom);
341 // Handle FP_TO_UINT by promoting the destination to a larger signed
343 setOperationAction(ISD::FP_TO_UINT , MVT::i1 , Promote);
344 setOperationAction(ISD::FP_TO_UINT , MVT::i8 , Promote);
345 setOperationAction(ISD::FP_TO_UINT , MVT::i16 , Promote);
347 if (Subtarget->is64Bit()) {
348 setOperationAction(ISD::FP_TO_UINT , MVT::i64 , Expand);
349 setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Promote);
350 } else if (!UseSoftFloat) {
351 if (X86ScalarSSEf32 && !Subtarget->hasSSE3())
352 // Expand FP_TO_UINT into a select.
353 // FIXME: We would like to use a Custom expander here eventually to do
354 // the optimal thing for SSE vs. the default expansion in the legalizer.
355 setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Expand);
357 // With SSE3 we can use fisttpll to convert to a signed i64; without
358 // SSE, we're stuck with a fistpll.
359 setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Custom);
362 // TODO: when we have SSE, these could be more efficient, by using movd/movq.
363 if (!X86ScalarSSEf64) {
364 setOperationAction(ISD::BITCAST , MVT::f32 , Expand);
365 setOperationAction(ISD::BITCAST , MVT::i32 , Expand);
366 if (Subtarget->is64Bit()) {
367 setOperationAction(ISD::BITCAST , MVT::f64 , Expand);
368 // Without SSE, i64->f64 goes through memory.
369 setOperationAction(ISD::BITCAST , MVT::i64 , Expand);
373 // Scalar integer divide and remainder are lowered to use operations that
374 // produce two results, to match the available instructions. This exposes
375 // the two-result form to trivial CSE, which is able to combine x/y and x%y
376 // into a single instruction.
378 // Scalar integer multiply-high is also lowered to use two-result
379 // operations, to match the available instructions. However, plain multiply
380 // (low) operations are left as Legal, as there are single-result
381 // instructions for this in x86. Using the two-result multiply instructions
382 // when both high and low results are needed must be arranged by dagcombine.
383 for (unsigned i = 0, e = 4; i != e; ++i) {
385 setOperationAction(ISD::MULHS, VT, Expand);
386 setOperationAction(ISD::MULHU, VT, Expand);
387 setOperationAction(ISD::SDIV, VT, Expand);
388 setOperationAction(ISD::UDIV, VT, Expand);
389 setOperationAction(ISD::SREM, VT, Expand);
390 setOperationAction(ISD::UREM, VT, Expand);
392 // Add/Sub overflow ops with MVT::Glues are lowered to EFLAGS dependences.
393 setOperationAction(ISD::ADDC, VT, Custom);
394 setOperationAction(ISD::ADDE, VT, Custom);
395 setOperationAction(ISD::SUBC, VT, Custom);
396 setOperationAction(ISD::SUBE, VT, Custom);
399 setOperationAction(ISD::BR_JT , MVT::Other, Expand);
400 setOperationAction(ISD::BRCOND , MVT::Other, Custom);
401 setOperationAction(ISD::BR_CC , MVT::Other, Expand);
402 setOperationAction(ISD::SELECT_CC , MVT::Other, Expand);
403 if (Subtarget->is64Bit())
404 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i32, Legal);
405 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16 , Legal);
406 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8 , Legal);
407 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1 , Expand);
408 setOperationAction(ISD::FP_ROUND_INREG , MVT::f32 , Expand);
409 setOperationAction(ISD::FREM , MVT::f32 , Expand);
410 setOperationAction(ISD::FREM , MVT::f64 , Expand);
411 setOperationAction(ISD::FREM , MVT::f80 , Expand);
412 setOperationAction(ISD::FLT_ROUNDS_ , MVT::i32 , Custom);
414 setOperationAction(ISD::CTTZ , MVT::i8 , Custom);
415 setOperationAction(ISD::CTLZ , MVT::i8 , Custom);
416 setOperationAction(ISD::CTTZ , MVT::i16 , Custom);
417 setOperationAction(ISD::CTLZ , MVT::i16 , Custom);
418 setOperationAction(ISD::CTTZ , MVT::i32 , Custom);
419 setOperationAction(ISD::CTLZ , MVT::i32 , Custom);
420 if (Subtarget->is64Bit()) {
421 setOperationAction(ISD::CTTZ , MVT::i64 , Custom);
422 setOperationAction(ISD::CTLZ , MVT::i64 , Custom);
425 if (Subtarget->hasPOPCNT()) {
426 setOperationAction(ISD::CTPOP , MVT::i8 , Promote);
428 setOperationAction(ISD::CTPOP , MVT::i8 , Expand);
429 setOperationAction(ISD::CTPOP , MVT::i16 , Expand);
430 setOperationAction(ISD::CTPOP , MVT::i32 , Expand);
431 if (Subtarget->is64Bit())
432 setOperationAction(ISD::CTPOP , MVT::i64 , Expand);
435 setOperationAction(ISD::READCYCLECOUNTER , MVT::i64 , Custom);
436 setOperationAction(ISD::BSWAP , MVT::i16 , Expand);
438 // These should be promoted to a larger select which is supported.
439 setOperationAction(ISD::SELECT , MVT::i1 , Promote);
440 // X86 wants to expand cmov itself.
441 setOperationAction(ISD::SELECT , MVT::i8 , Custom);
442 setOperationAction(ISD::SELECT , MVT::i16 , Custom);
443 setOperationAction(ISD::SELECT , MVT::i32 , Custom);
444 setOperationAction(ISD::SELECT , MVT::f32 , Custom);
445 setOperationAction(ISD::SELECT , MVT::f64 , Custom);
446 setOperationAction(ISD::SELECT , MVT::f80 , Custom);
447 setOperationAction(ISD::SETCC , MVT::i8 , Custom);
448 setOperationAction(ISD::SETCC , MVT::i16 , Custom);
449 setOperationAction(ISD::SETCC , MVT::i32 , Custom);
450 setOperationAction(ISD::SETCC , MVT::f32 , Custom);
451 setOperationAction(ISD::SETCC , MVT::f64 , Custom);
452 setOperationAction(ISD::SETCC , MVT::f80 , Custom);
453 if (Subtarget->is64Bit()) {
454 setOperationAction(ISD::SELECT , MVT::i64 , Custom);
455 setOperationAction(ISD::SETCC , MVT::i64 , Custom);
457 setOperationAction(ISD::EH_RETURN , MVT::Other, Custom);
460 setOperationAction(ISD::ConstantPool , MVT::i32 , Custom);
461 setOperationAction(ISD::JumpTable , MVT::i32 , Custom);
462 setOperationAction(ISD::GlobalAddress , MVT::i32 , Custom);
463 setOperationAction(ISD::GlobalTLSAddress, MVT::i32 , Custom);
464 if (Subtarget->is64Bit())
465 setOperationAction(ISD::GlobalTLSAddress, MVT::i64, Custom);
466 setOperationAction(ISD::ExternalSymbol , MVT::i32 , Custom);
467 setOperationAction(ISD::BlockAddress , MVT::i32 , Custom);
468 if (Subtarget->is64Bit()) {
469 setOperationAction(ISD::ConstantPool , MVT::i64 , Custom);
470 setOperationAction(ISD::JumpTable , MVT::i64 , Custom);
471 setOperationAction(ISD::GlobalAddress , MVT::i64 , Custom);
472 setOperationAction(ISD::ExternalSymbol, MVT::i64 , Custom);
473 setOperationAction(ISD::BlockAddress , MVT::i64 , Custom);
475 // 64-bit addm sub, shl, sra, srl (iff 32-bit x86)
476 setOperationAction(ISD::SHL_PARTS , MVT::i32 , Custom);
477 setOperationAction(ISD::SRA_PARTS , MVT::i32 , Custom);
478 setOperationAction(ISD::SRL_PARTS , MVT::i32 , Custom);
479 if (Subtarget->is64Bit()) {
480 setOperationAction(ISD::SHL_PARTS , MVT::i64 , Custom);
481 setOperationAction(ISD::SRA_PARTS , MVT::i64 , Custom);
482 setOperationAction(ISD::SRL_PARTS , MVT::i64 , Custom);
485 if (Subtarget->hasXMM())
486 setOperationAction(ISD::PREFETCH , MVT::Other, Legal);
488 // We may not have a libcall for MEMBARRIER so we should lower this.
489 setOperationAction(ISD::MEMBARRIER , MVT::Other, Custom);
491 // On X86 and X86-64, atomic operations are lowered to locked instructions.
492 // Locked instructions, in turn, have implicit fence semantics (all memory
493 // operations are flushed before issuing the locked instruction, and they
494 // are not buffered), so we can fold away the common pattern of
495 // fence-atomic-fence.
496 setShouldFoldAtomicFences(true);
498 // Expand certain atomics
499 for (unsigned i = 0, e = 4; i != e; ++i) {
501 setOperationAction(ISD::ATOMIC_CMP_SWAP, VT, Custom);
502 setOperationAction(ISD::ATOMIC_LOAD_SUB, VT, Custom);
505 if (!Subtarget->is64Bit()) {
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 // FIXME - use subtarget debug flags
516 if (!Subtarget->isTargetDarwin() &&
517 !Subtarget->isTargetELF() &&
518 !Subtarget->isTargetCygMing()) {
519 setOperationAction(ISD::EH_LABEL, MVT::Other, Expand);
522 setOperationAction(ISD::EXCEPTIONADDR, MVT::i64, Expand);
523 setOperationAction(ISD::EHSELECTION, MVT::i64, Expand);
524 setOperationAction(ISD::EXCEPTIONADDR, MVT::i32, Expand);
525 setOperationAction(ISD::EHSELECTION, MVT::i32, Expand);
526 if (Subtarget->is64Bit()) {
527 setExceptionPointerRegister(X86::RAX);
528 setExceptionSelectorRegister(X86::RDX);
530 setExceptionPointerRegister(X86::EAX);
531 setExceptionSelectorRegister(X86::EDX);
533 setOperationAction(ISD::FRAME_TO_ARGS_OFFSET, MVT::i32, Custom);
534 setOperationAction(ISD::FRAME_TO_ARGS_OFFSET, MVT::i64, Custom);
536 setOperationAction(ISD::TRAMPOLINE, MVT::Other, Custom);
538 setOperationAction(ISD::TRAP, MVT::Other, Legal);
540 // VASTART needs to be custom lowered to use the VarArgsFrameIndex
541 setOperationAction(ISD::VASTART , MVT::Other, Custom);
542 setOperationAction(ISD::VAEND , MVT::Other, Expand);
543 if (Subtarget->is64Bit()) {
544 setOperationAction(ISD::VAARG , MVT::Other, Custom);
545 setOperationAction(ISD::VACOPY , MVT::Other, Custom);
547 setOperationAction(ISD::VAARG , MVT::Other, Expand);
548 setOperationAction(ISD::VACOPY , MVT::Other, Expand);
551 setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
552 setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
553 setOperationAction(ISD::DYNAMIC_STACKALLOC,
554 (Subtarget->is64Bit() ? MVT::i64 : MVT::i32),
555 (Subtarget->isTargetCOFF()
556 && !Subtarget->isTargetEnvMacho()
559 if (!UseSoftFloat && X86ScalarSSEf64) {
560 // f32 and f64 use SSE.
561 // Set up the FP register classes.
562 addRegisterClass(MVT::f32, X86::FR32RegisterClass);
563 addRegisterClass(MVT::f64, X86::FR64RegisterClass);
565 // Use ANDPD to simulate FABS.
566 setOperationAction(ISD::FABS , MVT::f64, Custom);
567 setOperationAction(ISD::FABS , MVT::f32, Custom);
569 // Use XORP to simulate FNEG.
570 setOperationAction(ISD::FNEG , MVT::f64, Custom);
571 setOperationAction(ISD::FNEG , MVT::f32, Custom);
573 // Use ANDPD and ORPD to simulate FCOPYSIGN.
574 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Custom);
575 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
577 // Lower this to FGETSIGNx86 plus an AND.
578 setOperationAction(ISD::FGETSIGN, MVT::i64, Custom);
579 setOperationAction(ISD::FGETSIGN, MVT::i32, Custom);
581 // We don't support sin/cos/fmod
582 setOperationAction(ISD::FSIN , MVT::f64, Expand);
583 setOperationAction(ISD::FCOS , MVT::f64, Expand);
584 setOperationAction(ISD::FSIN , MVT::f32, Expand);
585 setOperationAction(ISD::FCOS , MVT::f32, Expand);
587 // Expand FP immediates into loads from the stack, except for the special
589 addLegalFPImmediate(APFloat(+0.0)); // xorpd
590 addLegalFPImmediate(APFloat(+0.0f)); // xorps
591 } else if (!UseSoftFloat && X86ScalarSSEf32) {
592 // Use SSE for f32, x87 for f64.
593 // Set up the FP register classes.
594 addRegisterClass(MVT::f32, X86::FR32RegisterClass);
595 addRegisterClass(MVT::f64, X86::RFP64RegisterClass);
597 // Use ANDPS to simulate FABS.
598 setOperationAction(ISD::FABS , MVT::f32, Custom);
600 // Use XORP to simulate FNEG.
601 setOperationAction(ISD::FNEG , MVT::f32, Custom);
603 setOperationAction(ISD::UNDEF, MVT::f64, Expand);
605 // Use ANDPS and ORPS to simulate FCOPYSIGN.
606 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
607 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
609 // We don't support sin/cos/fmod
610 setOperationAction(ISD::FSIN , MVT::f32, Expand);
611 setOperationAction(ISD::FCOS , MVT::f32, Expand);
613 // Special cases we handle for FP constants.
614 addLegalFPImmediate(APFloat(+0.0f)); // xorps
615 addLegalFPImmediate(APFloat(+0.0)); // FLD0
616 addLegalFPImmediate(APFloat(+1.0)); // FLD1
617 addLegalFPImmediate(APFloat(-0.0)); // FLD0/FCHS
618 addLegalFPImmediate(APFloat(-1.0)); // FLD1/FCHS
621 setOperationAction(ISD::FSIN , MVT::f64 , Expand);
622 setOperationAction(ISD::FCOS , MVT::f64 , Expand);
624 } else if (!UseSoftFloat) {
625 // f32 and f64 in x87.
626 // Set up the FP register classes.
627 addRegisterClass(MVT::f64, X86::RFP64RegisterClass);
628 addRegisterClass(MVT::f32, X86::RFP32RegisterClass);
630 setOperationAction(ISD::UNDEF, MVT::f64, Expand);
631 setOperationAction(ISD::UNDEF, MVT::f32, Expand);
632 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
633 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand);
636 setOperationAction(ISD::FSIN , MVT::f64 , Expand);
637 setOperationAction(ISD::FCOS , MVT::f64 , Expand);
639 addLegalFPImmediate(APFloat(+0.0)); // FLD0
640 addLegalFPImmediate(APFloat(+1.0)); // FLD1
641 addLegalFPImmediate(APFloat(-0.0)); // FLD0/FCHS
642 addLegalFPImmediate(APFloat(-1.0)); // FLD1/FCHS
643 addLegalFPImmediate(APFloat(+0.0f)); // FLD0
644 addLegalFPImmediate(APFloat(+1.0f)); // FLD1
645 addLegalFPImmediate(APFloat(-0.0f)); // FLD0/FCHS
646 addLegalFPImmediate(APFloat(-1.0f)); // FLD1/FCHS
649 // Long double always uses X87.
651 addRegisterClass(MVT::f80, X86::RFP80RegisterClass);
652 setOperationAction(ISD::UNDEF, MVT::f80, Expand);
653 setOperationAction(ISD::FCOPYSIGN, MVT::f80, Expand);
655 APFloat TmpFlt = APFloat::getZero(APFloat::x87DoubleExtended);
656 addLegalFPImmediate(TmpFlt); // FLD0
658 addLegalFPImmediate(TmpFlt); // FLD0/FCHS
661 APFloat TmpFlt2(+1.0);
662 TmpFlt2.convert(APFloat::x87DoubleExtended, APFloat::rmNearestTiesToEven,
664 addLegalFPImmediate(TmpFlt2); // FLD1
665 TmpFlt2.changeSign();
666 addLegalFPImmediate(TmpFlt2); // FLD1/FCHS
670 setOperationAction(ISD::FSIN , MVT::f80 , Expand);
671 setOperationAction(ISD::FCOS , MVT::f80 , Expand);
675 // Always use a library call for pow.
676 setOperationAction(ISD::FPOW , MVT::f32 , Expand);
677 setOperationAction(ISD::FPOW , MVT::f64 , Expand);
678 setOperationAction(ISD::FPOW , MVT::f80 , Expand);
680 setOperationAction(ISD::FLOG, MVT::f80, Expand);
681 setOperationAction(ISD::FLOG2, MVT::f80, Expand);
682 setOperationAction(ISD::FLOG10, MVT::f80, Expand);
683 setOperationAction(ISD::FEXP, MVT::f80, Expand);
684 setOperationAction(ISD::FEXP2, MVT::f80, Expand);
686 // First set operation action for all vector types to either promote
687 // (for widening) or expand (for scalarization). Then we will selectively
688 // turn on ones that can be effectively codegen'd.
689 for (unsigned VT = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
690 VT <= (unsigned)MVT::LAST_VECTOR_VALUETYPE; ++VT) {
691 setOperationAction(ISD::ADD , (MVT::SimpleValueType)VT, Expand);
692 setOperationAction(ISD::SUB , (MVT::SimpleValueType)VT, Expand);
693 setOperationAction(ISD::FADD, (MVT::SimpleValueType)VT, Expand);
694 setOperationAction(ISD::FNEG, (MVT::SimpleValueType)VT, Expand);
695 setOperationAction(ISD::FSUB, (MVT::SimpleValueType)VT, Expand);
696 setOperationAction(ISD::MUL , (MVT::SimpleValueType)VT, Expand);
697 setOperationAction(ISD::FMUL, (MVT::SimpleValueType)VT, Expand);
698 setOperationAction(ISD::SDIV, (MVT::SimpleValueType)VT, Expand);
699 setOperationAction(ISD::UDIV, (MVT::SimpleValueType)VT, Expand);
700 setOperationAction(ISD::FDIV, (MVT::SimpleValueType)VT, Expand);
701 setOperationAction(ISD::SREM, (MVT::SimpleValueType)VT, Expand);
702 setOperationAction(ISD::UREM, (MVT::SimpleValueType)VT, Expand);
703 setOperationAction(ISD::LOAD, (MVT::SimpleValueType)VT, Expand);
704 setOperationAction(ISD::VECTOR_SHUFFLE, (MVT::SimpleValueType)VT, Expand);
705 setOperationAction(ISD::EXTRACT_VECTOR_ELT,(MVT::SimpleValueType)VT,Expand);
706 setOperationAction(ISD::INSERT_VECTOR_ELT,(MVT::SimpleValueType)VT, Expand);
707 setOperationAction(ISD::EXTRACT_SUBVECTOR,(MVT::SimpleValueType)VT,Expand);
708 setOperationAction(ISD::INSERT_SUBVECTOR,(MVT::SimpleValueType)VT,Expand);
709 setOperationAction(ISD::FABS, (MVT::SimpleValueType)VT, Expand);
710 setOperationAction(ISD::FSIN, (MVT::SimpleValueType)VT, Expand);
711 setOperationAction(ISD::FCOS, (MVT::SimpleValueType)VT, Expand);
712 setOperationAction(ISD::FREM, (MVT::SimpleValueType)VT, Expand);
713 setOperationAction(ISD::FPOWI, (MVT::SimpleValueType)VT, Expand);
714 setOperationAction(ISD::FSQRT, (MVT::SimpleValueType)VT, Expand);
715 setOperationAction(ISD::FCOPYSIGN, (MVT::SimpleValueType)VT, Expand);
716 setOperationAction(ISD::SMUL_LOHI, (MVT::SimpleValueType)VT, Expand);
717 setOperationAction(ISD::UMUL_LOHI, (MVT::SimpleValueType)VT, Expand);
718 setOperationAction(ISD::SDIVREM, (MVT::SimpleValueType)VT, Expand);
719 setOperationAction(ISD::UDIVREM, (MVT::SimpleValueType)VT, Expand);
720 setOperationAction(ISD::FPOW, (MVT::SimpleValueType)VT, Expand);
721 setOperationAction(ISD::CTPOP, (MVT::SimpleValueType)VT, Expand);
722 setOperationAction(ISD::CTTZ, (MVT::SimpleValueType)VT, Expand);
723 setOperationAction(ISD::CTLZ, (MVT::SimpleValueType)VT, Expand);
724 setOperationAction(ISD::SHL, (MVT::SimpleValueType)VT, Expand);
725 setOperationAction(ISD::SRA, (MVT::SimpleValueType)VT, Expand);
726 setOperationAction(ISD::SRL, (MVT::SimpleValueType)VT, Expand);
727 setOperationAction(ISD::ROTL, (MVT::SimpleValueType)VT, Expand);
728 setOperationAction(ISD::ROTR, (MVT::SimpleValueType)VT, Expand);
729 setOperationAction(ISD::BSWAP, (MVT::SimpleValueType)VT, Expand);
730 setOperationAction(ISD::VSETCC, (MVT::SimpleValueType)VT, Expand);
731 setOperationAction(ISD::FLOG, (MVT::SimpleValueType)VT, Expand);
732 setOperationAction(ISD::FLOG2, (MVT::SimpleValueType)VT, Expand);
733 setOperationAction(ISD::FLOG10, (MVT::SimpleValueType)VT, Expand);
734 setOperationAction(ISD::FEXP, (MVT::SimpleValueType)VT, Expand);
735 setOperationAction(ISD::FEXP2, (MVT::SimpleValueType)VT, Expand);
736 setOperationAction(ISD::FP_TO_UINT, (MVT::SimpleValueType)VT, Expand);
737 setOperationAction(ISD::FP_TO_SINT, (MVT::SimpleValueType)VT, Expand);
738 setOperationAction(ISD::UINT_TO_FP, (MVT::SimpleValueType)VT, Expand);
739 setOperationAction(ISD::SINT_TO_FP, (MVT::SimpleValueType)VT, Expand);
740 setOperationAction(ISD::SIGN_EXTEND_INREG, (MVT::SimpleValueType)VT,Expand);
741 setOperationAction(ISD::TRUNCATE, (MVT::SimpleValueType)VT, Expand);
742 setOperationAction(ISD::SIGN_EXTEND, (MVT::SimpleValueType)VT, Expand);
743 setOperationAction(ISD::ZERO_EXTEND, (MVT::SimpleValueType)VT, Expand);
744 setOperationAction(ISD::ANY_EXTEND, (MVT::SimpleValueType)VT, Expand);
745 for (unsigned InnerVT = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
746 InnerVT <= (unsigned)MVT::LAST_VECTOR_VALUETYPE; ++InnerVT)
747 setTruncStoreAction((MVT::SimpleValueType)VT,
748 (MVT::SimpleValueType)InnerVT, Expand);
749 setLoadExtAction(ISD::SEXTLOAD, (MVT::SimpleValueType)VT, Expand);
750 setLoadExtAction(ISD::ZEXTLOAD, (MVT::SimpleValueType)VT, Expand);
751 setLoadExtAction(ISD::EXTLOAD, (MVT::SimpleValueType)VT, Expand);
754 // FIXME: In order to prevent SSE instructions being expanded to MMX ones
755 // with -msoft-float, disable use of MMX as well.
756 if (!UseSoftFloat && Subtarget->hasMMX()) {
757 addRegisterClass(MVT::x86mmx, X86::VR64RegisterClass);
758 // No operations on x86mmx supported, everything uses intrinsics.
761 // MMX-sized vectors (other than x86mmx) are expected to be expanded
762 // into smaller operations.
763 setOperationAction(ISD::MULHS, MVT::v8i8, Expand);
764 setOperationAction(ISD::MULHS, MVT::v4i16, Expand);
765 setOperationAction(ISD::MULHS, MVT::v2i32, Expand);
766 setOperationAction(ISD::MULHS, MVT::v1i64, Expand);
767 setOperationAction(ISD::AND, MVT::v8i8, Expand);
768 setOperationAction(ISD::AND, MVT::v4i16, Expand);
769 setOperationAction(ISD::AND, MVT::v2i32, Expand);
770 setOperationAction(ISD::AND, MVT::v1i64, Expand);
771 setOperationAction(ISD::OR, MVT::v8i8, Expand);
772 setOperationAction(ISD::OR, MVT::v4i16, Expand);
773 setOperationAction(ISD::OR, MVT::v2i32, Expand);
774 setOperationAction(ISD::OR, MVT::v1i64, Expand);
775 setOperationAction(ISD::XOR, MVT::v8i8, Expand);
776 setOperationAction(ISD::XOR, MVT::v4i16, Expand);
777 setOperationAction(ISD::XOR, MVT::v2i32, Expand);
778 setOperationAction(ISD::XOR, MVT::v1i64, Expand);
779 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v8i8, Expand);
780 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v4i16, Expand);
781 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v2i32, Expand);
782 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v1i64, Expand);
783 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v1i64, Expand);
784 setOperationAction(ISD::SELECT, MVT::v8i8, Expand);
785 setOperationAction(ISD::SELECT, MVT::v4i16, Expand);
786 setOperationAction(ISD::SELECT, MVT::v2i32, Expand);
787 setOperationAction(ISD::SELECT, MVT::v1i64, Expand);
788 setOperationAction(ISD::BITCAST, MVT::v8i8, Expand);
789 setOperationAction(ISD::BITCAST, MVT::v4i16, Expand);
790 setOperationAction(ISD::BITCAST, MVT::v2i32, Expand);
791 setOperationAction(ISD::BITCAST, MVT::v1i64, Expand);
793 if (!UseSoftFloat && Subtarget->hasXMM()) {
794 addRegisterClass(MVT::v4f32, X86::VR128RegisterClass);
796 setOperationAction(ISD::FADD, MVT::v4f32, Legal);
797 setOperationAction(ISD::FSUB, MVT::v4f32, Legal);
798 setOperationAction(ISD::FMUL, MVT::v4f32, Legal);
799 setOperationAction(ISD::FDIV, MVT::v4f32, Legal);
800 setOperationAction(ISD::FSQRT, MVT::v4f32, Legal);
801 setOperationAction(ISD::FNEG, MVT::v4f32, Custom);
802 setOperationAction(ISD::LOAD, MVT::v4f32, Legal);
803 setOperationAction(ISD::BUILD_VECTOR, MVT::v4f32, Custom);
804 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v4f32, Custom);
805 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4f32, Custom);
806 setOperationAction(ISD::SELECT, MVT::v4f32, Custom);
807 setOperationAction(ISD::VSETCC, MVT::v4f32, Custom);
810 if (!UseSoftFloat && Subtarget->hasXMMInt()) {
811 addRegisterClass(MVT::v2f64, X86::VR128RegisterClass);
813 // FIXME: Unfortunately -soft-float and -no-implicit-float means XMM
814 // registers cannot be used even for integer operations.
815 addRegisterClass(MVT::v16i8, X86::VR128RegisterClass);
816 addRegisterClass(MVT::v8i16, X86::VR128RegisterClass);
817 addRegisterClass(MVT::v4i32, X86::VR128RegisterClass);
818 addRegisterClass(MVT::v2i64, X86::VR128RegisterClass);
820 setOperationAction(ISD::ADD, MVT::v16i8, Legal);
821 setOperationAction(ISD::ADD, MVT::v8i16, Legal);
822 setOperationAction(ISD::ADD, MVT::v4i32, Legal);
823 setOperationAction(ISD::ADD, MVT::v2i64, Legal);
824 setOperationAction(ISD::MUL, MVT::v2i64, Custom);
825 setOperationAction(ISD::SUB, MVT::v16i8, Legal);
826 setOperationAction(ISD::SUB, MVT::v8i16, Legal);
827 setOperationAction(ISD::SUB, MVT::v4i32, Legal);
828 setOperationAction(ISD::SUB, MVT::v2i64, Legal);
829 setOperationAction(ISD::MUL, MVT::v8i16, Legal);
830 setOperationAction(ISD::FADD, MVT::v2f64, Legal);
831 setOperationAction(ISD::FSUB, MVT::v2f64, Legal);
832 setOperationAction(ISD::FMUL, MVT::v2f64, Legal);
833 setOperationAction(ISD::FDIV, MVT::v2f64, Legal);
834 setOperationAction(ISD::FSQRT, MVT::v2f64, Legal);
835 setOperationAction(ISD::FNEG, MVT::v2f64, Custom);
837 setOperationAction(ISD::VSETCC, MVT::v2f64, Custom);
838 setOperationAction(ISD::VSETCC, MVT::v16i8, Custom);
839 setOperationAction(ISD::VSETCC, MVT::v8i16, Custom);
840 setOperationAction(ISD::VSETCC, MVT::v4i32, Custom);
842 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v16i8, Custom);
843 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v8i16, Custom);
844 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8i16, Custom);
845 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4i32, Custom);
846 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4f32, Custom);
848 setOperationAction(ISD::CONCAT_VECTORS, MVT::v2f64, Custom);
849 setOperationAction(ISD::CONCAT_VECTORS, MVT::v2i64, Custom);
850 setOperationAction(ISD::CONCAT_VECTORS, MVT::v16i8, Custom);
851 setOperationAction(ISD::CONCAT_VECTORS, MVT::v8i16, Custom);
852 setOperationAction(ISD::CONCAT_VECTORS, MVT::v4i32, Custom);
854 // Custom lower build_vector, vector_shuffle, and extract_vector_elt.
855 for (unsigned i = (unsigned)MVT::v16i8; i != (unsigned)MVT::v2i64; ++i) {
856 EVT VT = (MVT::SimpleValueType)i;
857 // Do not attempt to custom lower non-power-of-2 vectors
858 if (!isPowerOf2_32(VT.getVectorNumElements()))
860 // Do not attempt to custom lower non-128-bit vectors
861 if (!VT.is128BitVector())
863 setOperationAction(ISD::BUILD_VECTOR,
864 VT.getSimpleVT().SimpleTy, Custom);
865 setOperationAction(ISD::VECTOR_SHUFFLE,
866 VT.getSimpleVT().SimpleTy, Custom);
867 setOperationAction(ISD::EXTRACT_VECTOR_ELT,
868 VT.getSimpleVT().SimpleTy, Custom);
871 setOperationAction(ISD::BUILD_VECTOR, MVT::v2f64, Custom);
872 setOperationAction(ISD::BUILD_VECTOR, MVT::v2i64, Custom);
873 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2f64, Custom);
874 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2i64, Custom);
875 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2f64, Custom);
876 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2f64, Custom);
878 if (Subtarget->is64Bit()) {
879 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2i64, Custom);
880 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2i64, Custom);
883 // Promote v16i8, v8i16, v4i32 load, select, and, or, xor to v2i64.
884 for (unsigned i = (unsigned)MVT::v16i8; i != (unsigned)MVT::v2i64; i++) {
885 MVT::SimpleValueType SVT = (MVT::SimpleValueType)i;
888 // Do not attempt to promote non-128-bit vectors
889 if (!VT.is128BitVector())
892 setOperationAction(ISD::AND, SVT, Promote);
893 AddPromotedToType (ISD::AND, SVT, MVT::v2i64);
894 setOperationAction(ISD::OR, SVT, Promote);
895 AddPromotedToType (ISD::OR, SVT, MVT::v2i64);
896 setOperationAction(ISD::XOR, SVT, Promote);
897 AddPromotedToType (ISD::XOR, SVT, MVT::v2i64);
898 setOperationAction(ISD::LOAD, SVT, Promote);
899 AddPromotedToType (ISD::LOAD, SVT, MVT::v2i64);
900 setOperationAction(ISD::SELECT, SVT, Promote);
901 AddPromotedToType (ISD::SELECT, SVT, MVT::v2i64);
904 setTruncStoreAction(MVT::f64, MVT::f32, Expand);
906 // Custom lower v2i64 and v2f64 selects.
907 setOperationAction(ISD::LOAD, MVT::v2f64, Legal);
908 setOperationAction(ISD::LOAD, MVT::v2i64, Legal);
909 setOperationAction(ISD::SELECT, MVT::v2f64, Custom);
910 setOperationAction(ISD::SELECT, MVT::v2i64, Custom);
912 setOperationAction(ISD::FP_TO_SINT, MVT::v4i32, Legal);
913 setOperationAction(ISD::SINT_TO_FP, MVT::v4i32, Legal);
916 if (Subtarget->hasSSE41()) {
917 setOperationAction(ISD::FFLOOR, MVT::f32, Legal);
918 setOperationAction(ISD::FCEIL, MVT::f32, Legal);
919 setOperationAction(ISD::FTRUNC, MVT::f32, Legal);
920 setOperationAction(ISD::FRINT, MVT::f32, Legal);
921 setOperationAction(ISD::FNEARBYINT, MVT::f32, Legal);
922 setOperationAction(ISD::FFLOOR, MVT::f64, Legal);
923 setOperationAction(ISD::FCEIL, MVT::f64, Legal);
924 setOperationAction(ISD::FTRUNC, MVT::f64, Legal);
925 setOperationAction(ISD::FRINT, MVT::f64, Legal);
926 setOperationAction(ISD::FNEARBYINT, MVT::f64, Legal);
928 // FIXME: Do we need to handle scalar-to-vector here?
929 setOperationAction(ISD::MUL, MVT::v4i32, Legal);
931 // Can turn SHL into an integer multiply.
932 setOperationAction(ISD::SHL, MVT::v4i32, Custom);
933 setOperationAction(ISD::SHL, MVT::v16i8, Custom);
935 // i8 and i16 vectors are custom , because the source register and source
936 // source memory operand types are not the same width. f32 vectors are
937 // custom since the immediate controlling the insert encodes additional
939 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v16i8, Custom);
940 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8i16, Custom);
941 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4i32, Custom);
942 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4f32, Custom);
944 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v16i8, Custom);
945 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v8i16, Custom);
946 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4i32, Custom);
947 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4f32, Custom);
949 if (Subtarget->is64Bit()) {
950 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2i64, Legal);
951 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2i64, Legal);
955 if (Subtarget->hasSSE2()) {
956 setOperationAction(ISD::SRL, MVT::v2i64, Custom);
957 setOperationAction(ISD::SRL, MVT::v4i32, Custom);
958 setOperationAction(ISD::SRL, MVT::v16i8, Custom);
960 setOperationAction(ISD::SHL, MVT::v2i64, Custom);
961 setOperationAction(ISD::SHL, MVT::v4i32, Custom);
962 setOperationAction(ISD::SHL, MVT::v8i16, Custom);
964 setOperationAction(ISD::SRA, MVT::v4i32, Custom);
965 setOperationAction(ISD::SRA, MVT::v8i16, Custom);
968 if (Subtarget->hasSSE42())
969 setOperationAction(ISD::VSETCC, MVT::v2i64, Custom);
971 if (!UseSoftFloat && Subtarget->hasAVX()) {
972 addRegisterClass(MVT::v8f32, X86::VR256RegisterClass);
973 addRegisterClass(MVT::v4f64, X86::VR256RegisterClass);
974 addRegisterClass(MVT::v8i32, X86::VR256RegisterClass);
975 addRegisterClass(MVT::v4i64, X86::VR256RegisterClass);
976 addRegisterClass(MVT::v32i8, X86::VR256RegisterClass);
978 setOperationAction(ISD::LOAD, MVT::v8f32, Legal);
979 setOperationAction(ISD::LOAD, MVT::v8i32, Legal);
980 setOperationAction(ISD::LOAD, MVT::v4f64, Legal);
981 setOperationAction(ISD::LOAD, MVT::v4i64, Legal);
983 setOperationAction(ISD::FADD, MVT::v8f32, Legal);
984 setOperationAction(ISD::FSUB, MVT::v8f32, Legal);
985 setOperationAction(ISD::FMUL, MVT::v8f32, Legal);
986 setOperationAction(ISD::FDIV, MVT::v8f32, Legal);
987 setOperationAction(ISD::FSQRT, MVT::v8f32, Legal);
988 setOperationAction(ISD::FNEG, MVT::v8f32, Custom);
990 setOperationAction(ISD::FADD, MVT::v4f64, Legal);
991 setOperationAction(ISD::FSUB, MVT::v4f64, Legal);
992 setOperationAction(ISD::FMUL, MVT::v4f64, Legal);
993 setOperationAction(ISD::FDIV, MVT::v4f64, Legal);
994 setOperationAction(ISD::FSQRT, MVT::v4f64, Legal);
995 setOperationAction(ISD::FNEG, MVT::v4f64, Custom);
997 // Custom lower build_vector, vector_shuffle, scalar_to_vector,
998 // insert_vector_elt extract_subvector and extract_vector_elt for
1000 for (unsigned i = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
1001 i <= (unsigned)MVT::LAST_VECTOR_VALUETYPE;
1003 MVT::SimpleValueType VT = (MVT::SimpleValueType)i;
1004 // Do not attempt to custom lower non-256-bit vectors
1005 if (!isPowerOf2_32(MVT(VT).getVectorNumElements())
1006 || (MVT(VT).getSizeInBits() < 256))
1008 setOperationAction(ISD::BUILD_VECTOR, VT, Custom);
1009 setOperationAction(ISD::VECTOR_SHUFFLE, VT, Custom);
1010 setOperationAction(ISD::INSERT_VECTOR_ELT, VT, Custom);
1011 setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Custom);
1012 setOperationAction(ISD::SCALAR_TO_VECTOR, VT, Custom);
1014 // Custom-lower insert_subvector and extract_subvector based on
1016 for (unsigned i = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
1017 i <= (unsigned)MVT::LAST_VECTOR_VALUETYPE;
1019 MVT::SimpleValueType VT = (MVT::SimpleValueType)i;
1020 // Do not attempt to custom lower non-256-bit vectors
1021 if (!isPowerOf2_32(MVT(VT).getVectorNumElements()))
1024 if (MVT(VT).getSizeInBits() == 128) {
1025 setOperationAction(ISD::EXTRACT_SUBVECTOR, VT, Custom);
1027 else if (MVT(VT).getSizeInBits() == 256) {
1028 setOperationAction(ISD::INSERT_SUBVECTOR, VT, Custom);
1032 // Promote v32i8, v16i16, v8i32 select, and, or, xor to v4i64.
1033 // Don't promote loads because we need them for VPERM vector index versions.
1035 for (unsigned VT = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
1036 VT != (unsigned)MVT::LAST_VECTOR_VALUETYPE;
1038 if (!isPowerOf2_32(MVT((MVT::SimpleValueType)VT).getVectorNumElements())
1039 || (MVT((MVT::SimpleValueType)VT).getSizeInBits() < 256))
1041 setOperationAction(ISD::AND, (MVT::SimpleValueType)VT, Promote);
1042 AddPromotedToType (ISD::AND, (MVT::SimpleValueType)VT, MVT::v4i64);
1043 setOperationAction(ISD::OR, (MVT::SimpleValueType)VT, Promote);
1044 AddPromotedToType (ISD::OR, (MVT::SimpleValueType)VT, MVT::v4i64);
1045 setOperationAction(ISD::XOR, (MVT::SimpleValueType)VT, Promote);
1046 AddPromotedToType (ISD::XOR, (MVT::SimpleValueType)VT, MVT::v4i64);
1047 //setOperationAction(ISD::LOAD, (MVT::SimpleValueType)VT, Promote);
1048 //AddPromotedToType (ISD::LOAD, (MVT::SimpleValueType)VT, MVT::v4i64);
1049 setOperationAction(ISD::SELECT, (MVT::SimpleValueType)VT, Promote);
1050 AddPromotedToType (ISD::SELECT, (MVT::SimpleValueType)VT, MVT::v4i64);
1054 // We want to custom lower some of our intrinsics.
1055 setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
1058 // Only custom-lower 64-bit SADDO and friends on 64-bit because we don't
1059 // handle type legalization for these operations here.
1061 // FIXME: We really should do custom legalization for addition and
1062 // subtraction on x86-32 once PR3203 is fixed. We really can't do much better
1063 // than generic legalization for 64-bit multiplication-with-overflow, though.
1064 for (unsigned i = 0, e = 3+Subtarget->is64Bit(); i != e; ++i) {
1065 // Add/Sub/Mul with overflow operations are custom lowered.
1067 setOperationAction(ISD::SADDO, VT, Custom);
1068 setOperationAction(ISD::UADDO, VT, Custom);
1069 setOperationAction(ISD::SSUBO, VT, Custom);
1070 setOperationAction(ISD::USUBO, VT, Custom);
1071 setOperationAction(ISD::SMULO, VT, Custom);
1072 setOperationAction(ISD::UMULO, VT, Custom);
1075 // There are no 8-bit 3-address imul/mul instructions
1076 setOperationAction(ISD::SMULO, MVT::i8, Expand);
1077 setOperationAction(ISD::UMULO, MVT::i8, Expand);
1079 if (!Subtarget->is64Bit()) {
1080 // These libcalls are not available in 32-bit.
1081 setLibcallName(RTLIB::SHL_I128, 0);
1082 setLibcallName(RTLIB::SRL_I128, 0);
1083 setLibcallName(RTLIB::SRA_I128, 0);
1086 // We have target-specific dag combine patterns for the following nodes:
1087 setTargetDAGCombine(ISD::VECTOR_SHUFFLE);
1088 setTargetDAGCombine(ISD::EXTRACT_VECTOR_ELT);
1089 setTargetDAGCombine(ISD::BUILD_VECTOR);
1090 setTargetDAGCombine(ISD::SELECT);
1091 setTargetDAGCombine(ISD::SHL);
1092 setTargetDAGCombine(ISD::SRA);
1093 setTargetDAGCombine(ISD::SRL);
1094 setTargetDAGCombine(ISD::OR);
1095 setTargetDAGCombine(ISD::AND);
1096 setTargetDAGCombine(ISD::ADD);
1097 setTargetDAGCombine(ISD::SUB);
1098 setTargetDAGCombine(ISD::STORE);
1099 setTargetDAGCombine(ISD::ZERO_EXTEND);
1100 setTargetDAGCombine(ISD::SINT_TO_FP);
1101 if (Subtarget->is64Bit())
1102 setTargetDAGCombine(ISD::MUL);
1104 computeRegisterProperties();
1106 // On Darwin, -Os means optimize for size without hurting performance,
1107 // do not reduce the limit.
1108 maxStoresPerMemset = 16; // For @llvm.memset -> sequence of stores
1109 maxStoresPerMemsetOptSize = Subtarget->isTargetDarwin() ? 16 : 8;
1110 maxStoresPerMemcpy = 8; // For @llvm.memcpy -> sequence of stores
1111 maxStoresPerMemcpyOptSize = Subtarget->isTargetDarwin() ? 8 : 4;
1112 maxStoresPerMemmove = 8; // For @llvm.memmove -> sequence of stores
1113 maxStoresPerMemmoveOptSize = Subtarget->isTargetDarwin() ? 8 : 4;
1114 setPrefLoopAlignment(16);
1115 benefitFromCodePlacementOpt = true;
1117 setPrefFunctionAlignment(4);
1121 MVT::SimpleValueType X86TargetLowering::getSetCCResultType(EVT VT) const {
1126 /// getMaxByValAlign - Helper for getByValTypeAlignment to determine
1127 /// the desired ByVal argument alignment.
1128 static void getMaxByValAlign(const Type *Ty, unsigned &MaxAlign) {
1131 if (const VectorType *VTy = dyn_cast<VectorType>(Ty)) {
1132 if (VTy->getBitWidth() == 128)
1134 } else if (const ArrayType *ATy = dyn_cast<ArrayType>(Ty)) {
1135 unsigned EltAlign = 0;
1136 getMaxByValAlign(ATy->getElementType(), EltAlign);
1137 if (EltAlign > MaxAlign)
1138 MaxAlign = EltAlign;
1139 } else if (const StructType *STy = dyn_cast<StructType>(Ty)) {
1140 for (unsigned i = 0, e = STy->getNumElements(); i != e; ++i) {
1141 unsigned EltAlign = 0;
1142 getMaxByValAlign(STy->getElementType(i), EltAlign);
1143 if (EltAlign > MaxAlign)
1144 MaxAlign = EltAlign;
1152 /// getByValTypeAlignment - Return the desired alignment for ByVal aggregate
1153 /// function arguments in the caller parameter area. For X86, aggregates
1154 /// that contain SSE vectors are placed at 16-byte boundaries while the rest
1155 /// are at 4-byte boundaries.
1156 unsigned X86TargetLowering::getByValTypeAlignment(const Type *Ty) const {
1157 if (Subtarget->is64Bit()) {
1158 // Max of 8 and alignment of type.
1159 unsigned TyAlign = TD->getABITypeAlignment(Ty);
1166 if (Subtarget->hasXMM())
1167 getMaxByValAlign(Ty, Align);
1171 /// getOptimalMemOpType - Returns the target specific optimal type for load
1172 /// and store operations as a result of memset, memcpy, and memmove
1173 /// lowering. If DstAlign is zero that means it's safe to destination
1174 /// alignment can satisfy any constraint. Similarly if SrcAlign is zero it
1175 /// means there isn't a need to check it against alignment requirement,
1176 /// probably because the source does not need to be loaded. If
1177 /// 'NonScalarIntSafe' is true, that means it's safe to return a
1178 /// non-scalar-integer type, e.g. empty string source, constant, or loaded
1179 /// from memory. 'MemcpyStrSrc' indicates whether the memcpy source is
1180 /// constant so it does not need to be loaded.
1181 /// It returns EVT::Other if the type should be determined using generic
1182 /// target-independent logic.
1184 X86TargetLowering::getOptimalMemOpType(uint64_t Size,
1185 unsigned DstAlign, unsigned SrcAlign,
1186 bool NonScalarIntSafe,
1188 MachineFunction &MF) const {
1189 // FIXME: This turns off use of xmm stores for memset/memcpy on targets like
1190 // linux. This is because the stack realignment code can't handle certain
1191 // cases like PR2962. This should be removed when PR2962 is fixed.
1192 const Function *F = MF.getFunction();
1193 if (NonScalarIntSafe &&
1194 !F->hasFnAttr(Attribute::NoImplicitFloat)) {
1196 (Subtarget->isUnalignedMemAccessFast() ||
1197 ((DstAlign == 0 || DstAlign >= 16) &&
1198 (SrcAlign == 0 || SrcAlign >= 16))) &&
1199 Subtarget->getStackAlignment() >= 16) {
1200 if (Subtarget->hasSSE2())
1202 if (Subtarget->hasSSE1())
1204 } else if (!MemcpyStrSrc && Size >= 8 &&
1205 !Subtarget->is64Bit() &&
1206 Subtarget->getStackAlignment() >= 8 &&
1207 Subtarget->hasXMMInt()) {
1208 // Do not use f64 to lower memcpy if source is string constant. It's
1209 // better to use i32 to avoid the loads.
1213 if (Subtarget->is64Bit() && Size >= 8)
1218 /// getJumpTableEncoding - Return the entry encoding for a jump table in the
1219 /// current function. The returned value is a member of the
1220 /// MachineJumpTableInfo::JTEntryKind enum.
1221 unsigned X86TargetLowering::getJumpTableEncoding() const {
1222 // In GOT pic mode, each entry in the jump table is emitted as a @GOTOFF
1224 if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
1225 Subtarget->isPICStyleGOT())
1226 return MachineJumpTableInfo::EK_Custom32;
1228 // Otherwise, use the normal jump table encoding heuristics.
1229 return TargetLowering::getJumpTableEncoding();
1233 X86TargetLowering::LowerCustomJumpTableEntry(const MachineJumpTableInfo *MJTI,
1234 const MachineBasicBlock *MBB,
1235 unsigned uid,MCContext &Ctx) const{
1236 assert(getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
1237 Subtarget->isPICStyleGOT());
1238 // In 32-bit ELF systems, our jump table entries are formed with @GOTOFF
1240 return MCSymbolRefExpr::Create(MBB->getSymbol(),
1241 MCSymbolRefExpr::VK_GOTOFF, Ctx);
1244 /// getPICJumpTableRelocaBase - Returns relocation base for the given PIC
1246 SDValue X86TargetLowering::getPICJumpTableRelocBase(SDValue Table,
1247 SelectionDAG &DAG) const {
1248 if (!Subtarget->is64Bit())
1249 // This doesn't have DebugLoc associated with it, but is not really the
1250 // same as a Register.
1251 return DAG.getNode(X86ISD::GlobalBaseReg, DebugLoc(), getPointerTy());
1255 /// getPICJumpTableRelocBaseExpr - This returns the relocation base for the
1256 /// given PIC jumptable, the same as getPICJumpTableRelocBase, but as an
1258 const MCExpr *X86TargetLowering::
1259 getPICJumpTableRelocBaseExpr(const MachineFunction *MF, unsigned JTI,
1260 MCContext &Ctx) const {
1261 // X86-64 uses RIP relative addressing based on the jump table label.
1262 if (Subtarget->isPICStyleRIPRel())
1263 return TargetLowering::getPICJumpTableRelocBaseExpr(MF, JTI, Ctx);
1265 // Otherwise, the reference is relative to the PIC base.
1266 return MCSymbolRefExpr::Create(MF->getPICBaseSymbol(), Ctx);
1269 // FIXME: Why this routine is here? Move to RegInfo!
1270 std::pair<const TargetRegisterClass*, uint8_t>
1271 X86TargetLowering::findRepresentativeClass(EVT VT) const{
1272 const TargetRegisterClass *RRC = 0;
1274 switch (VT.getSimpleVT().SimpleTy) {
1276 return TargetLowering::findRepresentativeClass(VT);
1277 case MVT::i8: case MVT::i16: case MVT::i32: case MVT::i64:
1278 RRC = (Subtarget->is64Bit()
1279 ? X86::GR64RegisterClass : X86::GR32RegisterClass);
1282 RRC = X86::VR64RegisterClass;
1284 case MVT::f32: case MVT::f64:
1285 case MVT::v16i8: case MVT::v8i16: case MVT::v4i32: case MVT::v2i64:
1286 case MVT::v4f32: case MVT::v2f64:
1287 case MVT::v32i8: case MVT::v8i32: case MVT::v4i64: case MVT::v8f32:
1289 RRC = X86::VR128RegisterClass;
1292 return std::make_pair(RRC, Cost);
1295 bool X86TargetLowering::getStackCookieLocation(unsigned &AddressSpace,
1296 unsigned &Offset) const {
1297 if (!Subtarget->isTargetLinux())
1300 if (Subtarget->is64Bit()) {
1301 // %fs:0x28, unless we're using a Kernel code model, in which case it's %gs:
1303 if (getTargetMachine().getCodeModel() == CodeModel::Kernel)
1316 //===----------------------------------------------------------------------===//
1317 // Return Value Calling Convention Implementation
1318 //===----------------------------------------------------------------------===//
1320 #include "X86GenCallingConv.inc"
1323 X86TargetLowering::CanLowerReturn(CallingConv::ID CallConv,
1324 MachineFunction &MF, bool isVarArg,
1325 const SmallVectorImpl<ISD::OutputArg> &Outs,
1326 LLVMContext &Context) const {
1327 SmallVector<CCValAssign, 16> RVLocs;
1328 CCState CCInfo(CallConv, isVarArg, MF, getTargetMachine(),
1330 return CCInfo.CheckReturn(Outs, RetCC_X86);
1334 X86TargetLowering::LowerReturn(SDValue Chain,
1335 CallingConv::ID CallConv, bool isVarArg,
1336 const SmallVectorImpl<ISD::OutputArg> &Outs,
1337 const SmallVectorImpl<SDValue> &OutVals,
1338 DebugLoc dl, SelectionDAG &DAG) const {
1339 MachineFunction &MF = DAG.getMachineFunction();
1340 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
1342 SmallVector<CCValAssign, 16> RVLocs;
1343 CCState CCInfo(CallConv, isVarArg, MF, getTargetMachine(),
1344 RVLocs, *DAG.getContext());
1345 CCInfo.AnalyzeReturn(Outs, RetCC_X86);
1347 // Add the regs to the liveout set for the function.
1348 MachineRegisterInfo &MRI = DAG.getMachineFunction().getRegInfo();
1349 for (unsigned i = 0; i != RVLocs.size(); ++i)
1350 if (RVLocs[i].isRegLoc() && !MRI.isLiveOut(RVLocs[i].getLocReg()))
1351 MRI.addLiveOut(RVLocs[i].getLocReg());
1355 SmallVector<SDValue, 6> RetOps;
1356 RetOps.push_back(Chain); // Operand #0 = Chain (updated below)
1357 // Operand #1 = Bytes To Pop
1358 RetOps.push_back(DAG.getTargetConstant(FuncInfo->getBytesToPopOnReturn(),
1361 // Copy the result values into the output registers.
1362 for (unsigned i = 0; i != RVLocs.size(); ++i) {
1363 CCValAssign &VA = RVLocs[i];
1364 assert(VA.isRegLoc() && "Can only return in registers!");
1365 SDValue ValToCopy = OutVals[i];
1366 EVT ValVT = ValToCopy.getValueType();
1368 // If this is x86-64, and we disabled SSE, we can't return FP values,
1369 // or SSE or MMX vectors.
1370 if ((ValVT == MVT::f32 || ValVT == MVT::f64 ||
1371 VA.getLocReg() == X86::XMM0 || VA.getLocReg() == X86::XMM1) &&
1372 (Subtarget->is64Bit() && !Subtarget->hasXMM())) {
1373 report_fatal_error("SSE register return with SSE disabled");
1375 // Likewise we can't return F64 values with SSE1 only. gcc does so, but
1376 // llvm-gcc has never done it right and no one has noticed, so this
1377 // should be OK for now.
1378 if (ValVT == MVT::f64 &&
1379 (Subtarget->is64Bit() && !Subtarget->hasXMMInt()))
1380 report_fatal_error("SSE2 register return with SSE2 disabled");
1382 // Returns in ST0/ST1 are handled specially: these are pushed as operands to
1383 // the RET instruction and handled by the FP Stackifier.
1384 if (VA.getLocReg() == X86::ST0 ||
1385 VA.getLocReg() == X86::ST1) {
1386 // If this is a copy from an xmm register to ST(0), use an FPExtend to
1387 // change the value to the FP stack register class.
1388 if (isScalarFPTypeInSSEReg(VA.getValVT()))
1389 ValToCopy = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f80, ValToCopy);
1390 RetOps.push_back(ValToCopy);
1391 // Don't emit a copytoreg.
1395 // 64-bit vector (MMX) values are returned in XMM0 / XMM1 except for v1i64
1396 // which is returned in RAX / RDX.
1397 if (Subtarget->is64Bit()) {
1398 if (ValVT == MVT::x86mmx) {
1399 if (VA.getLocReg() == X86::XMM0 || VA.getLocReg() == X86::XMM1) {
1400 ValToCopy = DAG.getNode(ISD::BITCAST, dl, MVT::i64, ValToCopy);
1401 ValToCopy = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2i64,
1403 // If we don't have SSE2 available, convert to v4f32 so the generated
1404 // register is legal.
1405 if (!Subtarget->hasSSE2())
1406 ValToCopy = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32,ValToCopy);
1411 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), ValToCopy, Flag);
1412 Flag = Chain.getValue(1);
1415 // The x86-64 ABI for returning structs by value requires that we copy
1416 // the sret argument into %rax for the return. We saved the argument into
1417 // a virtual register in the entry block, so now we copy the value out
1419 if (Subtarget->is64Bit() &&
1420 DAG.getMachineFunction().getFunction()->hasStructRetAttr()) {
1421 MachineFunction &MF = DAG.getMachineFunction();
1422 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
1423 unsigned Reg = FuncInfo->getSRetReturnReg();
1425 "SRetReturnReg should have been set in LowerFormalArguments().");
1426 SDValue Val = DAG.getCopyFromReg(Chain, dl, Reg, getPointerTy());
1428 Chain = DAG.getCopyToReg(Chain, dl, X86::RAX, Val, Flag);
1429 Flag = Chain.getValue(1);
1431 // RAX now acts like a return value.
1432 MRI.addLiveOut(X86::RAX);
1435 RetOps[0] = Chain; // Update chain.
1437 // Add the flag if we have it.
1439 RetOps.push_back(Flag);
1441 return DAG.getNode(X86ISD::RET_FLAG, dl,
1442 MVT::Other, &RetOps[0], RetOps.size());
1445 bool X86TargetLowering::isUsedByReturnOnly(SDNode *N) const {
1446 if (N->getNumValues() != 1)
1448 if (!N->hasNUsesOfValue(1, 0))
1451 SDNode *Copy = *N->use_begin();
1452 if (Copy->getOpcode() != ISD::CopyToReg &&
1453 Copy->getOpcode() != ISD::FP_EXTEND)
1456 bool HasRet = false;
1457 for (SDNode::use_iterator UI = Copy->use_begin(), UE = Copy->use_end();
1459 if (UI->getOpcode() != X86ISD::RET_FLAG)
1468 X86TargetLowering::getTypeForExtArgOrReturn(LLVMContext &Context, EVT VT,
1469 ISD::NodeType ExtendKind) const {
1471 // TODO: Is this also valid on 32-bit?
1472 if (Subtarget->is64Bit() && VT == MVT::i1 && ExtendKind == ISD::ZERO_EXTEND)
1473 ReturnMVT = MVT::i8;
1475 ReturnMVT = MVT::i32;
1477 EVT MinVT = getRegisterType(Context, ReturnMVT);
1478 return VT.bitsLT(MinVT) ? MinVT : VT;
1481 /// LowerCallResult - Lower the result values of a call into the
1482 /// appropriate copies out of appropriate physical registers.
1485 X86TargetLowering::LowerCallResult(SDValue Chain, SDValue InFlag,
1486 CallingConv::ID CallConv, bool isVarArg,
1487 const SmallVectorImpl<ISD::InputArg> &Ins,
1488 DebugLoc dl, SelectionDAG &DAG,
1489 SmallVectorImpl<SDValue> &InVals) const {
1491 // Assign locations to each value returned by this call.
1492 SmallVector<CCValAssign, 16> RVLocs;
1493 bool Is64Bit = Subtarget->is64Bit();
1494 CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
1495 getTargetMachine(), RVLocs, *DAG.getContext());
1496 CCInfo.AnalyzeCallResult(Ins, RetCC_X86);
1498 // Copy all of the result registers out of their specified physreg.
1499 for (unsigned i = 0; i != RVLocs.size(); ++i) {
1500 CCValAssign &VA = RVLocs[i];
1501 EVT CopyVT = VA.getValVT();
1503 // If this is x86-64, and we disabled SSE, we can't return FP values
1504 if ((CopyVT == MVT::f32 || CopyVT == MVT::f64) &&
1505 ((Is64Bit || Ins[i].Flags.isInReg()) && !Subtarget->hasXMM())) {
1506 report_fatal_error("SSE register return with SSE disabled");
1511 // If this is a call to a function that returns an fp value on the floating
1512 // point stack, we must guarantee the the value is popped from the stack, so
1513 // a CopyFromReg is not good enough - the copy instruction may be eliminated
1514 // if the return value is not used. We use the FpGET_ST0 instructions
1516 if (VA.getLocReg() == X86::ST0 || VA.getLocReg() == X86::ST1) {
1517 // If we prefer to use the value in xmm registers, copy it out as f80 and
1518 // use a truncate to move it from fp stack reg to xmm reg.
1519 if (isScalarFPTypeInSSEReg(VA.getValVT())) CopyVT = MVT::f80;
1520 bool isST0 = VA.getLocReg() == X86::ST0;
1522 if (CopyVT == MVT::f32) Opc = isST0 ? X86::FpGET_ST0_32:X86::FpGET_ST1_32;
1523 if (CopyVT == MVT::f64) Opc = isST0 ? X86::FpGET_ST0_64:X86::FpGET_ST1_64;
1524 if (CopyVT == MVT::f80) Opc = isST0 ? X86::FpGET_ST0_80:X86::FpGET_ST1_80;
1525 SDValue Ops[] = { Chain, InFlag };
1526 Chain = SDValue(DAG.getMachineNode(Opc, dl, CopyVT, MVT::Other, MVT::Glue,
1528 Val = Chain.getValue(0);
1530 // Round the f80 to the right size, which also moves it to the appropriate
1532 if (CopyVT != VA.getValVT())
1533 Val = DAG.getNode(ISD::FP_ROUND, dl, VA.getValVT(), Val,
1534 // This truncation won't change the value.
1535 DAG.getIntPtrConstant(1));
1537 Chain = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(),
1538 CopyVT, InFlag).getValue(1);
1539 Val = Chain.getValue(0);
1541 InFlag = Chain.getValue(2);
1542 InVals.push_back(Val);
1549 //===----------------------------------------------------------------------===//
1550 // C & StdCall & Fast Calling Convention implementation
1551 //===----------------------------------------------------------------------===//
1552 // StdCall calling convention seems to be standard for many Windows' API
1553 // routines and around. It differs from C calling convention just a little:
1554 // callee should clean up the stack, not caller. Symbols should be also
1555 // decorated in some fancy way :) It doesn't support any vector arguments.
1556 // For info on fast calling convention see Fast Calling Convention (tail call)
1557 // implementation LowerX86_32FastCCCallTo.
1559 /// CallIsStructReturn - Determines whether a call uses struct return
1561 static bool CallIsStructReturn(const SmallVectorImpl<ISD::OutputArg> &Outs) {
1565 return Outs[0].Flags.isSRet();
1568 /// ArgsAreStructReturn - Determines whether a function uses struct
1569 /// return semantics.
1571 ArgsAreStructReturn(const SmallVectorImpl<ISD::InputArg> &Ins) {
1575 return Ins[0].Flags.isSRet();
1578 /// CreateCopyOfByValArgument - Make a copy of an aggregate at address specified
1579 /// by "Src" to address "Dst" with size and alignment information specified by
1580 /// the specific parameter attribute. The copy will be passed as a byval
1581 /// function parameter.
1583 CreateCopyOfByValArgument(SDValue Src, SDValue Dst, SDValue Chain,
1584 ISD::ArgFlagsTy Flags, SelectionDAG &DAG,
1586 SDValue SizeNode = DAG.getConstant(Flags.getByValSize(), MVT::i32);
1588 return DAG.getMemcpy(Chain, dl, Dst, Src, SizeNode, Flags.getByValAlign(),
1589 /*isVolatile*/false, /*AlwaysInline=*/true,
1590 MachinePointerInfo(), MachinePointerInfo());
1593 /// IsTailCallConvention - Return true if the calling convention is one that
1594 /// supports tail call optimization.
1595 static bool IsTailCallConvention(CallingConv::ID CC) {
1596 return (CC == CallingConv::Fast || CC == CallingConv::GHC);
1599 bool X86TargetLowering::mayBeEmittedAsTailCall(CallInst *CI) const {
1600 if (!CI->isTailCall())
1604 CallingConv::ID CalleeCC = CS.getCallingConv();
1605 if (!IsTailCallConvention(CalleeCC) && CalleeCC != CallingConv::C)
1611 /// FuncIsMadeTailCallSafe - Return true if the function is being made into
1612 /// a tailcall target by changing its ABI.
1613 static bool FuncIsMadeTailCallSafe(CallingConv::ID CC) {
1614 return GuaranteedTailCallOpt && IsTailCallConvention(CC);
1618 X86TargetLowering::LowerMemArgument(SDValue Chain,
1619 CallingConv::ID CallConv,
1620 const SmallVectorImpl<ISD::InputArg> &Ins,
1621 DebugLoc dl, SelectionDAG &DAG,
1622 const CCValAssign &VA,
1623 MachineFrameInfo *MFI,
1625 // Create the nodes corresponding to a load from this parameter slot.
1626 ISD::ArgFlagsTy Flags = Ins[i].Flags;
1627 bool AlwaysUseMutable = FuncIsMadeTailCallSafe(CallConv);
1628 bool isImmutable = !AlwaysUseMutable && !Flags.isByVal();
1631 // If value is passed by pointer we have address passed instead of the value
1633 if (VA.getLocInfo() == CCValAssign::Indirect)
1634 ValVT = VA.getLocVT();
1636 ValVT = VA.getValVT();
1638 // FIXME: For now, all byval parameter objects are marked mutable. This can be
1639 // changed with more analysis.
1640 // In case of tail call optimization mark all arguments mutable. Since they
1641 // could be overwritten by lowering of arguments in case of a tail call.
1642 if (Flags.isByVal()) {
1643 unsigned Bytes = Flags.getByValSize();
1644 if (Bytes == 0) Bytes = 1; // Don't create zero-sized stack objects.
1645 int FI = MFI->CreateFixedObject(Bytes, VA.getLocMemOffset(), isImmutable);
1646 return DAG.getFrameIndex(FI, getPointerTy());
1648 int FI = MFI->CreateFixedObject(ValVT.getSizeInBits()/8,
1649 VA.getLocMemOffset(), isImmutable);
1650 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
1651 return DAG.getLoad(ValVT, dl, Chain, FIN,
1652 MachinePointerInfo::getFixedStack(FI),
1658 X86TargetLowering::LowerFormalArguments(SDValue Chain,
1659 CallingConv::ID CallConv,
1661 const SmallVectorImpl<ISD::InputArg> &Ins,
1664 SmallVectorImpl<SDValue> &InVals)
1666 MachineFunction &MF = DAG.getMachineFunction();
1667 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
1669 const Function* Fn = MF.getFunction();
1670 if (Fn->hasExternalLinkage() &&
1671 Subtarget->isTargetCygMing() &&
1672 Fn->getName() == "main")
1673 FuncInfo->setForceFramePointer(true);
1675 MachineFrameInfo *MFI = MF.getFrameInfo();
1676 bool Is64Bit = Subtarget->is64Bit();
1677 bool IsWin64 = Subtarget->isTargetWin64();
1679 assert(!(isVarArg && IsTailCallConvention(CallConv)) &&
1680 "Var args not supported with calling convention fastcc or ghc");
1682 // Assign locations to all of the incoming arguments.
1683 SmallVector<CCValAssign, 16> ArgLocs;
1684 CCState CCInfo(CallConv, isVarArg, MF, getTargetMachine(),
1685 ArgLocs, *DAG.getContext());
1687 // Allocate shadow area for Win64
1689 CCInfo.AllocateStack(32, 8);
1692 CCInfo.AnalyzeFormalArguments(Ins, CC_X86);
1694 unsigned LastVal = ~0U;
1696 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
1697 CCValAssign &VA = ArgLocs[i];
1698 // TODO: If an arg is passed in two places (e.g. reg and stack), skip later
1700 assert(VA.getValNo() != LastVal &&
1701 "Don't support value assigned to multiple locs yet");
1702 LastVal = VA.getValNo();
1704 if (VA.isRegLoc()) {
1705 EVT RegVT = VA.getLocVT();
1706 TargetRegisterClass *RC = NULL;
1707 if (RegVT == MVT::i32)
1708 RC = X86::GR32RegisterClass;
1709 else if (Is64Bit && RegVT == MVT::i64)
1710 RC = X86::GR64RegisterClass;
1711 else if (RegVT == MVT::f32)
1712 RC = X86::FR32RegisterClass;
1713 else if (RegVT == MVT::f64)
1714 RC = X86::FR64RegisterClass;
1715 else if (RegVT.isVector() && RegVT.getSizeInBits() == 256)
1716 RC = X86::VR256RegisterClass;
1717 else if (RegVT.isVector() && RegVT.getSizeInBits() == 128)
1718 RC = X86::VR128RegisterClass;
1719 else if (RegVT == MVT::x86mmx)
1720 RC = X86::VR64RegisterClass;
1722 llvm_unreachable("Unknown argument type!");
1724 unsigned Reg = MF.addLiveIn(VA.getLocReg(), RC);
1725 ArgValue = DAG.getCopyFromReg(Chain, dl, Reg, RegVT);
1727 // If this is an 8 or 16-bit value, it is really passed promoted to 32
1728 // bits. Insert an assert[sz]ext to capture this, then truncate to the
1730 if (VA.getLocInfo() == CCValAssign::SExt)
1731 ArgValue = DAG.getNode(ISD::AssertSext, dl, RegVT, ArgValue,
1732 DAG.getValueType(VA.getValVT()));
1733 else if (VA.getLocInfo() == CCValAssign::ZExt)
1734 ArgValue = DAG.getNode(ISD::AssertZext, dl, RegVT, ArgValue,
1735 DAG.getValueType(VA.getValVT()));
1736 else if (VA.getLocInfo() == CCValAssign::BCvt)
1737 ArgValue = DAG.getNode(ISD::BITCAST, dl, VA.getValVT(), ArgValue);
1739 if (VA.isExtInLoc()) {
1740 // Handle MMX values passed in XMM regs.
1741 if (RegVT.isVector()) {
1742 ArgValue = DAG.getNode(X86ISD::MOVDQ2Q, dl, VA.getValVT(),
1745 ArgValue = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), ArgValue);
1748 assert(VA.isMemLoc());
1749 ArgValue = LowerMemArgument(Chain, CallConv, Ins, dl, DAG, VA, MFI, i);
1752 // If value is passed via pointer - do a load.
1753 if (VA.getLocInfo() == CCValAssign::Indirect)
1754 ArgValue = DAG.getLoad(VA.getValVT(), dl, Chain, ArgValue,
1755 MachinePointerInfo(), false, false, 0);
1757 InVals.push_back(ArgValue);
1760 // The x86-64 ABI for returning structs by value requires that we copy
1761 // the sret argument into %rax for the return. Save the argument into
1762 // a virtual register so that we can access it from the return points.
1763 if (Is64Bit && MF.getFunction()->hasStructRetAttr()) {
1764 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
1765 unsigned Reg = FuncInfo->getSRetReturnReg();
1767 Reg = MF.getRegInfo().createVirtualRegister(getRegClassFor(MVT::i64));
1768 FuncInfo->setSRetReturnReg(Reg);
1770 SDValue Copy = DAG.getCopyToReg(DAG.getEntryNode(), dl, Reg, InVals[0]);
1771 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Copy, Chain);
1774 unsigned StackSize = CCInfo.getNextStackOffset();
1775 // Align stack specially for tail calls.
1776 if (FuncIsMadeTailCallSafe(CallConv))
1777 StackSize = GetAlignedArgumentStackSize(StackSize, DAG);
1779 // If the function takes variable number of arguments, make a frame index for
1780 // the start of the first vararg value... for expansion of llvm.va_start.
1782 if (Is64Bit || (CallConv != CallingConv::X86_FastCall &&
1783 CallConv != CallingConv::X86_ThisCall)) {
1784 FuncInfo->setVarArgsFrameIndex(MFI->CreateFixedObject(1, StackSize,true));
1787 unsigned TotalNumIntRegs = 0, TotalNumXMMRegs = 0;
1789 // FIXME: We should really autogenerate these arrays
1790 static const unsigned GPR64ArgRegsWin64[] = {
1791 X86::RCX, X86::RDX, X86::R8, X86::R9
1793 static const unsigned GPR64ArgRegs64Bit[] = {
1794 X86::RDI, X86::RSI, X86::RDX, X86::RCX, X86::R8, X86::R9
1796 static const unsigned XMMArgRegs64Bit[] = {
1797 X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3,
1798 X86::XMM4, X86::XMM5, X86::XMM6, X86::XMM7
1800 const unsigned *GPR64ArgRegs;
1801 unsigned NumXMMRegs = 0;
1804 // The XMM registers which might contain var arg parameters are shadowed
1805 // in their paired GPR. So we only need to save the GPR to their home
1807 TotalNumIntRegs = 4;
1808 GPR64ArgRegs = GPR64ArgRegsWin64;
1810 TotalNumIntRegs = 6; TotalNumXMMRegs = 8;
1811 GPR64ArgRegs = GPR64ArgRegs64Bit;
1813 NumXMMRegs = CCInfo.getFirstUnallocated(XMMArgRegs64Bit, TotalNumXMMRegs);
1815 unsigned NumIntRegs = CCInfo.getFirstUnallocated(GPR64ArgRegs,
1818 bool NoImplicitFloatOps = Fn->hasFnAttr(Attribute::NoImplicitFloat);
1819 assert(!(NumXMMRegs && !Subtarget->hasXMM()) &&
1820 "SSE register cannot be used when SSE is disabled!");
1821 assert(!(NumXMMRegs && UseSoftFloat && NoImplicitFloatOps) &&
1822 "SSE register cannot be used when SSE is disabled!");
1823 if (UseSoftFloat || NoImplicitFloatOps || !Subtarget->hasXMM())
1824 // Kernel mode asks for SSE to be disabled, so don't push them
1826 TotalNumXMMRegs = 0;
1829 const TargetFrameLowering &TFI = *getTargetMachine().getFrameLowering();
1830 // Get to the caller-allocated home save location. Add 8 to account
1831 // for the return address.
1832 int HomeOffset = TFI.getOffsetOfLocalArea() + 8;
1833 FuncInfo->setRegSaveFrameIndex(
1834 MFI->CreateFixedObject(1, NumIntRegs * 8 + HomeOffset, false));
1835 // Fixup to set vararg frame on shadow area (4 x i64).
1837 FuncInfo->setVarArgsFrameIndex(FuncInfo->getRegSaveFrameIndex());
1839 // For X86-64, if there are vararg parameters that are passed via
1840 // registers, then we must store them to their spots on the stack so they
1841 // may be loaded by deferencing the result of va_next.
1842 FuncInfo->setVarArgsGPOffset(NumIntRegs * 8);
1843 FuncInfo->setVarArgsFPOffset(TotalNumIntRegs * 8 + NumXMMRegs * 16);
1844 FuncInfo->setRegSaveFrameIndex(
1845 MFI->CreateStackObject(TotalNumIntRegs * 8 + TotalNumXMMRegs * 16, 16,
1849 // Store the integer parameter registers.
1850 SmallVector<SDValue, 8> MemOps;
1851 SDValue RSFIN = DAG.getFrameIndex(FuncInfo->getRegSaveFrameIndex(),
1853 unsigned Offset = FuncInfo->getVarArgsGPOffset();
1854 for (; NumIntRegs != TotalNumIntRegs; ++NumIntRegs) {
1855 SDValue FIN = DAG.getNode(ISD::ADD, dl, getPointerTy(), RSFIN,
1856 DAG.getIntPtrConstant(Offset));
1857 unsigned VReg = MF.addLiveIn(GPR64ArgRegs[NumIntRegs],
1858 X86::GR64RegisterClass);
1859 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i64);
1861 DAG.getStore(Val.getValue(1), dl, Val, FIN,
1862 MachinePointerInfo::getFixedStack(
1863 FuncInfo->getRegSaveFrameIndex(), Offset),
1865 MemOps.push_back(Store);
1869 if (TotalNumXMMRegs != 0 && NumXMMRegs != TotalNumXMMRegs) {
1870 // Now store the XMM (fp + vector) parameter registers.
1871 SmallVector<SDValue, 11> SaveXMMOps;
1872 SaveXMMOps.push_back(Chain);
1874 unsigned AL = MF.addLiveIn(X86::AL, X86::GR8RegisterClass);
1875 SDValue ALVal = DAG.getCopyFromReg(DAG.getEntryNode(), dl, AL, MVT::i8);
1876 SaveXMMOps.push_back(ALVal);
1878 SaveXMMOps.push_back(DAG.getIntPtrConstant(
1879 FuncInfo->getRegSaveFrameIndex()));
1880 SaveXMMOps.push_back(DAG.getIntPtrConstant(
1881 FuncInfo->getVarArgsFPOffset()));
1883 for (; NumXMMRegs != TotalNumXMMRegs; ++NumXMMRegs) {
1884 unsigned VReg = MF.addLiveIn(XMMArgRegs64Bit[NumXMMRegs],
1885 X86::VR128RegisterClass);
1886 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, MVT::v4f32);
1887 SaveXMMOps.push_back(Val);
1889 MemOps.push_back(DAG.getNode(X86ISD::VASTART_SAVE_XMM_REGS, dl,
1891 &SaveXMMOps[0], SaveXMMOps.size()));
1894 if (!MemOps.empty())
1895 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
1896 &MemOps[0], MemOps.size());
1900 // Some CCs need callee pop.
1901 if (X86::isCalleePop(CallConv, Is64Bit, isVarArg, GuaranteedTailCallOpt)) {
1902 FuncInfo->setBytesToPopOnReturn(StackSize); // Callee pops everything.
1904 FuncInfo->setBytesToPopOnReturn(0); // Callee pops nothing.
1905 // If this is an sret function, the return should pop the hidden pointer.
1906 if (!Is64Bit && !IsTailCallConvention(CallConv) && ArgsAreStructReturn(Ins))
1907 FuncInfo->setBytesToPopOnReturn(4);
1911 // RegSaveFrameIndex is X86-64 only.
1912 FuncInfo->setRegSaveFrameIndex(0xAAAAAAA);
1913 if (CallConv == CallingConv::X86_FastCall ||
1914 CallConv == CallingConv::X86_ThisCall)
1915 // fastcc functions can't have varargs.
1916 FuncInfo->setVarArgsFrameIndex(0xAAAAAAA);
1923 X86TargetLowering::LowerMemOpCallTo(SDValue Chain,
1924 SDValue StackPtr, SDValue Arg,
1925 DebugLoc dl, SelectionDAG &DAG,
1926 const CCValAssign &VA,
1927 ISD::ArgFlagsTy Flags) const {
1928 unsigned LocMemOffset = VA.getLocMemOffset();
1929 SDValue PtrOff = DAG.getIntPtrConstant(LocMemOffset);
1930 PtrOff = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr, PtrOff);
1931 if (Flags.isByVal())
1932 return CreateCopyOfByValArgument(Arg, PtrOff, Chain, Flags, DAG, dl);
1934 return DAG.getStore(Chain, dl, Arg, PtrOff,
1935 MachinePointerInfo::getStack(LocMemOffset),
1939 /// EmitTailCallLoadRetAddr - Emit a load of return address if tail call
1940 /// optimization is performed and it is required.
1942 X86TargetLowering::EmitTailCallLoadRetAddr(SelectionDAG &DAG,
1943 SDValue &OutRetAddr, SDValue Chain,
1944 bool IsTailCall, bool Is64Bit,
1945 int FPDiff, DebugLoc dl) const {
1946 // Adjust the Return address stack slot.
1947 EVT VT = getPointerTy();
1948 OutRetAddr = getReturnAddressFrameIndex(DAG);
1950 // Load the "old" Return address.
1951 OutRetAddr = DAG.getLoad(VT, dl, Chain, OutRetAddr, MachinePointerInfo(),
1953 return SDValue(OutRetAddr.getNode(), 1);
1956 /// EmitTailCallStoreRetAddr - Emit a store of the return address if tail call
1957 /// optimization is performed and it is required (FPDiff!=0).
1959 EmitTailCallStoreRetAddr(SelectionDAG & DAG, MachineFunction &MF,
1960 SDValue Chain, SDValue RetAddrFrIdx,
1961 bool Is64Bit, int FPDiff, DebugLoc dl) {
1962 // Store the return address to the appropriate stack slot.
1963 if (!FPDiff) return Chain;
1964 // Calculate the new stack slot for the return address.
1965 int SlotSize = Is64Bit ? 8 : 4;
1966 int NewReturnAddrFI =
1967 MF.getFrameInfo()->CreateFixedObject(SlotSize, FPDiff-SlotSize, false);
1968 EVT VT = Is64Bit ? MVT::i64 : MVT::i32;
1969 SDValue NewRetAddrFrIdx = DAG.getFrameIndex(NewReturnAddrFI, VT);
1970 Chain = DAG.getStore(Chain, dl, RetAddrFrIdx, NewRetAddrFrIdx,
1971 MachinePointerInfo::getFixedStack(NewReturnAddrFI),
1977 X86TargetLowering::LowerCall(SDValue Chain, SDValue Callee,
1978 CallingConv::ID CallConv, bool isVarArg,
1980 const SmallVectorImpl<ISD::OutputArg> &Outs,
1981 const SmallVectorImpl<SDValue> &OutVals,
1982 const SmallVectorImpl<ISD::InputArg> &Ins,
1983 DebugLoc dl, SelectionDAG &DAG,
1984 SmallVectorImpl<SDValue> &InVals) const {
1985 MachineFunction &MF = DAG.getMachineFunction();
1986 bool Is64Bit = Subtarget->is64Bit();
1987 bool IsWin64 = Subtarget->isTargetWin64();
1988 bool IsStructRet = CallIsStructReturn(Outs);
1989 bool IsSibcall = false;
1992 // Check if it's really possible to do a tail call.
1993 isTailCall = IsEligibleForTailCallOptimization(Callee, CallConv,
1994 isVarArg, IsStructRet, MF.getFunction()->hasStructRetAttr(),
1995 Outs, OutVals, Ins, DAG);
1997 // Sibcalls are automatically detected tailcalls which do not require
1999 if (!GuaranteedTailCallOpt && isTailCall)
2006 assert(!(isVarArg && IsTailCallConvention(CallConv)) &&
2007 "Var args not supported with calling convention fastcc or ghc");
2009 // Analyze operands of the call, assigning locations to each operand.
2010 SmallVector<CCValAssign, 16> ArgLocs;
2011 CCState CCInfo(CallConv, isVarArg, MF, getTargetMachine(),
2012 ArgLocs, *DAG.getContext());
2014 // Allocate shadow area for Win64
2016 CCInfo.AllocateStack(32, 8);
2019 CCInfo.AnalyzeCallOperands(Outs, CC_X86);
2021 // Get a count of how many bytes are to be pushed on the stack.
2022 unsigned NumBytes = CCInfo.getNextStackOffset();
2024 // This is a sibcall. The memory operands are available in caller's
2025 // own caller's stack.
2027 else if (GuaranteedTailCallOpt && IsTailCallConvention(CallConv))
2028 NumBytes = GetAlignedArgumentStackSize(NumBytes, DAG);
2031 if (isTailCall && !IsSibcall) {
2032 // Lower arguments at fp - stackoffset + fpdiff.
2033 unsigned NumBytesCallerPushed =
2034 MF.getInfo<X86MachineFunctionInfo>()->getBytesToPopOnReturn();
2035 FPDiff = NumBytesCallerPushed - NumBytes;
2037 // Set the delta of movement of the returnaddr stackslot.
2038 // But only set if delta is greater than previous delta.
2039 if (FPDiff < (MF.getInfo<X86MachineFunctionInfo>()->getTCReturnAddrDelta()))
2040 MF.getInfo<X86MachineFunctionInfo>()->setTCReturnAddrDelta(FPDiff);
2044 Chain = DAG.getCALLSEQ_START(Chain, DAG.getIntPtrConstant(NumBytes, true));
2046 SDValue RetAddrFrIdx;
2047 // Load return address for tail calls.
2048 if (isTailCall && FPDiff)
2049 Chain = EmitTailCallLoadRetAddr(DAG, RetAddrFrIdx, Chain, isTailCall,
2050 Is64Bit, FPDiff, dl);
2052 SmallVector<std::pair<unsigned, SDValue>, 8> RegsToPass;
2053 SmallVector<SDValue, 8> MemOpChains;
2056 // Walk the register/memloc assignments, inserting copies/loads. In the case
2057 // of tail call optimization arguments are handle later.
2058 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2059 CCValAssign &VA = ArgLocs[i];
2060 EVT RegVT = VA.getLocVT();
2061 SDValue Arg = OutVals[i];
2062 ISD::ArgFlagsTy Flags = Outs[i].Flags;
2063 bool isByVal = Flags.isByVal();
2065 // Promote the value if needed.
2066 switch (VA.getLocInfo()) {
2067 default: llvm_unreachable("Unknown loc info!");
2068 case CCValAssign::Full: break;
2069 case CCValAssign::SExt:
2070 Arg = DAG.getNode(ISD::SIGN_EXTEND, dl, RegVT, Arg);
2072 case CCValAssign::ZExt:
2073 Arg = DAG.getNode(ISD::ZERO_EXTEND, dl, RegVT, Arg);
2075 case CCValAssign::AExt:
2076 if (RegVT.isVector() && RegVT.getSizeInBits() == 128) {
2077 // Special case: passing MMX values in XMM registers.
2078 Arg = DAG.getNode(ISD::BITCAST, dl, MVT::i64, Arg);
2079 Arg = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2i64, Arg);
2080 Arg = getMOVL(DAG, dl, MVT::v2i64, DAG.getUNDEF(MVT::v2i64), Arg);
2082 Arg = DAG.getNode(ISD::ANY_EXTEND, dl, RegVT, Arg);
2084 case CCValAssign::BCvt:
2085 Arg = DAG.getNode(ISD::BITCAST, dl, RegVT, Arg);
2087 case CCValAssign::Indirect: {
2088 // Store the argument.
2089 SDValue SpillSlot = DAG.CreateStackTemporary(VA.getValVT());
2090 int FI = cast<FrameIndexSDNode>(SpillSlot)->getIndex();
2091 Chain = DAG.getStore(Chain, dl, Arg, SpillSlot,
2092 MachinePointerInfo::getFixedStack(FI),
2099 if (VA.isRegLoc()) {
2100 RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
2101 if (isVarArg && IsWin64) {
2102 // Win64 ABI requires argument XMM reg to be copied to the corresponding
2103 // shadow reg if callee is a varargs function.
2104 unsigned ShadowReg = 0;
2105 switch (VA.getLocReg()) {
2106 case X86::XMM0: ShadowReg = X86::RCX; break;
2107 case X86::XMM1: ShadowReg = X86::RDX; break;
2108 case X86::XMM2: ShadowReg = X86::R8; break;
2109 case X86::XMM3: ShadowReg = X86::R9; break;
2112 RegsToPass.push_back(std::make_pair(ShadowReg, Arg));
2114 } else if (!IsSibcall && (!isTailCall || isByVal)) {
2115 assert(VA.isMemLoc());
2116 if (StackPtr.getNode() == 0)
2117 StackPtr = DAG.getCopyFromReg(Chain, dl, X86StackPtr, getPointerTy());
2118 MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, Arg,
2119 dl, DAG, VA, Flags));
2123 if (!MemOpChains.empty())
2124 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
2125 &MemOpChains[0], MemOpChains.size());
2127 // Build a sequence of copy-to-reg nodes chained together with token chain
2128 // and flag operands which copy the outgoing args into registers.
2130 // Tail call byval lowering might overwrite argument registers so in case of
2131 // tail call optimization the copies to registers are lowered later.
2133 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
2134 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
2135 RegsToPass[i].second, InFlag);
2136 InFlag = Chain.getValue(1);
2139 if (Subtarget->isPICStyleGOT()) {
2140 // ELF / PIC requires GOT in the EBX register before function calls via PLT
2143 Chain = DAG.getCopyToReg(Chain, dl, X86::EBX,
2144 DAG.getNode(X86ISD::GlobalBaseReg,
2145 DebugLoc(), getPointerTy()),
2147 InFlag = Chain.getValue(1);
2149 // If we are tail calling and generating PIC/GOT style code load the
2150 // address of the callee into ECX. The value in ecx is used as target of
2151 // the tail jump. This is done to circumvent the ebx/callee-saved problem
2152 // for tail calls on PIC/GOT architectures. Normally we would just put the
2153 // address of GOT into ebx and then call target@PLT. But for tail calls
2154 // ebx would be restored (since ebx is callee saved) before jumping to the
2157 // Note: The actual moving to ECX is done further down.
2158 GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee);
2159 if (G && !G->getGlobal()->hasHiddenVisibility() &&
2160 !G->getGlobal()->hasProtectedVisibility())
2161 Callee = LowerGlobalAddress(Callee, DAG);
2162 else if (isa<ExternalSymbolSDNode>(Callee))
2163 Callee = LowerExternalSymbol(Callee, DAG);
2167 if (Is64Bit && isVarArg && !IsWin64) {
2168 // From AMD64 ABI document:
2169 // For calls that may call functions that use varargs or stdargs
2170 // (prototype-less calls or calls to functions containing ellipsis (...) in
2171 // the declaration) %al is used as hidden argument to specify the number
2172 // of SSE registers used. The contents of %al do not need to match exactly
2173 // the number of registers, but must be an ubound on the number of SSE
2174 // registers used and is in the range 0 - 8 inclusive.
2176 // Count the number of XMM registers allocated.
2177 static const unsigned XMMArgRegs[] = {
2178 X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3,
2179 X86::XMM4, X86::XMM5, X86::XMM6, X86::XMM7
2181 unsigned NumXMMRegs = CCInfo.getFirstUnallocated(XMMArgRegs, 8);
2182 assert((Subtarget->hasXMM() || !NumXMMRegs)
2183 && "SSE registers cannot be used when SSE is disabled");
2185 Chain = DAG.getCopyToReg(Chain, dl, X86::AL,
2186 DAG.getConstant(NumXMMRegs, MVT::i8), InFlag);
2187 InFlag = Chain.getValue(1);
2191 // For tail calls lower the arguments to the 'real' stack slot.
2193 // Force all the incoming stack arguments to be loaded from the stack
2194 // before any new outgoing arguments are stored to the stack, because the
2195 // outgoing stack slots may alias the incoming argument stack slots, and
2196 // the alias isn't otherwise explicit. This is slightly more conservative
2197 // than necessary, because it means that each store effectively depends
2198 // on every argument instead of just those arguments it would clobber.
2199 SDValue ArgChain = DAG.getStackArgumentTokenFactor(Chain);
2201 SmallVector<SDValue, 8> MemOpChains2;
2204 // Do not flag preceding copytoreg stuff together with the following stuff.
2206 if (GuaranteedTailCallOpt) {
2207 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2208 CCValAssign &VA = ArgLocs[i];
2211 assert(VA.isMemLoc());
2212 SDValue Arg = OutVals[i];
2213 ISD::ArgFlagsTy Flags = Outs[i].Flags;
2214 // Create frame index.
2215 int32_t Offset = VA.getLocMemOffset()+FPDiff;
2216 uint32_t OpSize = (VA.getLocVT().getSizeInBits()+7)/8;
2217 FI = MF.getFrameInfo()->CreateFixedObject(OpSize, Offset, true);
2218 FIN = DAG.getFrameIndex(FI, getPointerTy());
2220 if (Flags.isByVal()) {
2221 // Copy relative to framepointer.
2222 SDValue Source = DAG.getIntPtrConstant(VA.getLocMemOffset());
2223 if (StackPtr.getNode() == 0)
2224 StackPtr = DAG.getCopyFromReg(Chain, dl, X86StackPtr,
2226 Source = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr, Source);
2228 MemOpChains2.push_back(CreateCopyOfByValArgument(Source, FIN,
2232 // Store relative to framepointer.
2233 MemOpChains2.push_back(
2234 DAG.getStore(ArgChain, dl, Arg, FIN,
2235 MachinePointerInfo::getFixedStack(FI),
2241 if (!MemOpChains2.empty())
2242 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
2243 &MemOpChains2[0], MemOpChains2.size());
2245 // Copy arguments to their registers.
2246 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
2247 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
2248 RegsToPass[i].second, InFlag);
2249 InFlag = Chain.getValue(1);
2253 // Store the return address to the appropriate stack slot.
2254 Chain = EmitTailCallStoreRetAddr(DAG, MF, Chain, RetAddrFrIdx, Is64Bit,
2258 if (getTargetMachine().getCodeModel() == CodeModel::Large) {
2259 assert(Is64Bit && "Large code model is only legal in 64-bit mode.");
2260 // In the 64-bit large code model, we have to make all calls
2261 // through a register, since the call instruction's 32-bit
2262 // pc-relative offset may not be large enough to hold the whole
2264 } else if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
2265 // If the callee is a GlobalAddress node (quite common, every direct call
2266 // is) turn it into a TargetGlobalAddress node so that legalize doesn't hack
2269 // We should use extra load for direct calls to dllimported functions in
2271 const GlobalValue *GV = G->getGlobal();
2272 if (!GV->hasDLLImportLinkage()) {
2273 unsigned char OpFlags = 0;
2274 bool ExtraLoad = false;
2275 unsigned WrapperKind = ISD::DELETED_NODE;
2277 // On ELF targets, in both X86-64 and X86-32 mode, direct calls to
2278 // external symbols most go through the PLT in PIC mode. If the symbol
2279 // has hidden or protected visibility, or if it is static or local, then
2280 // we don't need to use the PLT - we can directly call it.
2281 if (Subtarget->isTargetELF() &&
2282 getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
2283 GV->hasDefaultVisibility() && !GV->hasLocalLinkage()) {
2284 OpFlags = X86II::MO_PLT;
2285 } else if (Subtarget->isPICStyleStubAny() &&
2286 (GV->isDeclaration() || GV->isWeakForLinker()) &&
2287 (!Subtarget->getTargetTriple().isMacOSX() ||
2288 Subtarget->getTargetTriple().isMacOSXVersionLT(10, 5))) {
2289 // PC-relative references to external symbols should go through $stub,
2290 // unless we're building with the leopard linker or later, which
2291 // automatically synthesizes these stubs.
2292 OpFlags = X86II::MO_DARWIN_STUB;
2293 } else if (Subtarget->isPICStyleRIPRel() &&
2294 isa<Function>(GV) &&
2295 cast<Function>(GV)->hasFnAttr(Attribute::NonLazyBind)) {
2296 // If the function is marked as non-lazy, generate an indirect call
2297 // which loads from the GOT directly. This avoids runtime overhead
2298 // at the cost of eager binding (and one extra byte of encoding).
2299 OpFlags = X86II::MO_GOTPCREL;
2300 WrapperKind = X86ISD::WrapperRIP;
2304 Callee = DAG.getTargetGlobalAddress(GV, dl, getPointerTy(),
2305 G->getOffset(), OpFlags);
2307 // Add a wrapper if needed.
2308 if (WrapperKind != ISD::DELETED_NODE)
2309 Callee = DAG.getNode(X86ISD::WrapperRIP, dl, getPointerTy(), Callee);
2310 // Add extra indirection if needed.
2312 Callee = DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(), Callee,
2313 MachinePointerInfo::getGOT(),
2316 } else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) {
2317 unsigned char OpFlags = 0;
2319 // On ELF targets, in either X86-64 or X86-32 mode, direct calls to
2320 // external symbols should go through the PLT.
2321 if (Subtarget->isTargetELF() &&
2322 getTargetMachine().getRelocationModel() == Reloc::PIC_) {
2323 OpFlags = X86II::MO_PLT;
2324 } else if (Subtarget->isPICStyleStubAny() &&
2325 (!Subtarget->getTargetTriple().isMacOSX() ||
2326 Subtarget->getTargetTriple().isMacOSXVersionLT(10, 5))) {
2327 // PC-relative references to external symbols should go through $stub,
2328 // unless we're building with the leopard linker or later, which
2329 // automatically synthesizes these stubs.
2330 OpFlags = X86II::MO_DARWIN_STUB;
2333 Callee = DAG.getTargetExternalSymbol(S->getSymbol(), getPointerTy(),
2337 // Returns a chain & a flag for retval copy to use.
2338 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
2339 SmallVector<SDValue, 8> Ops;
2341 if (!IsSibcall && isTailCall) {
2342 Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(NumBytes, true),
2343 DAG.getIntPtrConstant(0, true), InFlag);
2344 InFlag = Chain.getValue(1);
2347 Ops.push_back(Chain);
2348 Ops.push_back(Callee);
2351 Ops.push_back(DAG.getConstant(FPDiff, MVT::i32));
2353 // Add argument registers to the end of the list so that they are known live
2355 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
2356 Ops.push_back(DAG.getRegister(RegsToPass[i].first,
2357 RegsToPass[i].second.getValueType()));
2359 // Add an implicit use GOT pointer in EBX.
2360 if (!isTailCall && Subtarget->isPICStyleGOT())
2361 Ops.push_back(DAG.getRegister(X86::EBX, getPointerTy()));
2363 // Add an implicit use of AL for non-Windows x86 64-bit vararg functions.
2364 if (Is64Bit && isVarArg && !IsWin64)
2365 Ops.push_back(DAG.getRegister(X86::AL, MVT::i8));
2367 if (InFlag.getNode())
2368 Ops.push_back(InFlag);
2372 //// If this is the first return lowered for this function, add the regs
2373 //// to the liveout set for the function.
2374 // This isn't right, although it's probably harmless on x86; liveouts
2375 // should be computed from returns not tail calls. Consider a void
2376 // function making a tail call to a function returning int.
2377 return DAG.getNode(X86ISD::TC_RETURN, dl,
2378 NodeTys, &Ops[0], Ops.size());
2381 Chain = DAG.getNode(X86ISD::CALL, dl, NodeTys, &Ops[0], Ops.size());
2382 InFlag = Chain.getValue(1);
2384 // Create the CALLSEQ_END node.
2385 unsigned NumBytesForCalleeToPush;
2386 if (X86::isCalleePop(CallConv, Is64Bit, isVarArg, GuaranteedTailCallOpt))
2387 NumBytesForCalleeToPush = NumBytes; // Callee pops everything
2388 else if (!Is64Bit && !IsTailCallConvention(CallConv) && IsStructRet)
2389 // If this is a call to a struct-return function, the callee
2390 // pops the hidden struct pointer, so we have to push it back.
2391 // This is common for Darwin/X86, Linux & Mingw32 targets.
2392 NumBytesForCalleeToPush = 4;
2394 NumBytesForCalleeToPush = 0; // Callee pops nothing.
2396 // Returns a flag for retval copy to use.
2398 Chain = DAG.getCALLSEQ_END(Chain,
2399 DAG.getIntPtrConstant(NumBytes, true),
2400 DAG.getIntPtrConstant(NumBytesForCalleeToPush,
2403 InFlag = Chain.getValue(1);
2406 // Handle result values, copying them out of physregs into vregs that we
2408 return LowerCallResult(Chain, InFlag, CallConv, isVarArg,
2409 Ins, dl, DAG, InVals);
2413 //===----------------------------------------------------------------------===//
2414 // Fast Calling Convention (tail call) implementation
2415 //===----------------------------------------------------------------------===//
2417 // Like std call, callee cleans arguments, convention except that ECX is
2418 // reserved for storing the tail called function address. Only 2 registers are
2419 // free for argument passing (inreg). Tail call optimization is performed
2421 // * tailcallopt is enabled
2422 // * caller/callee are fastcc
2423 // On X86_64 architecture with GOT-style position independent code only local
2424 // (within module) calls are supported at the moment.
2425 // To keep the stack aligned according to platform abi the function
2426 // GetAlignedArgumentStackSize ensures that argument delta is always multiples
2427 // of stack alignment. (Dynamic linkers need this - darwin's dyld for example)
2428 // If a tail called function callee has more arguments than the caller the
2429 // caller needs to make sure that there is room to move the RETADDR to. This is
2430 // achieved by reserving an area the size of the argument delta right after the
2431 // original REtADDR, but before the saved framepointer or the spilled registers
2432 // e.g. caller(arg1, arg2) calls callee(arg1, arg2,arg3,arg4)
2444 /// GetAlignedArgumentStackSize - Make the stack size align e.g 16n + 12 aligned
2445 /// for a 16 byte align requirement.
2447 X86TargetLowering::GetAlignedArgumentStackSize(unsigned StackSize,
2448 SelectionDAG& DAG) const {
2449 MachineFunction &MF = DAG.getMachineFunction();
2450 const TargetMachine &TM = MF.getTarget();
2451 const TargetFrameLowering &TFI = *TM.getFrameLowering();
2452 unsigned StackAlignment = TFI.getStackAlignment();
2453 uint64_t AlignMask = StackAlignment - 1;
2454 int64_t Offset = StackSize;
2455 uint64_t SlotSize = TD->getPointerSize();
2456 if ( (Offset & AlignMask) <= (StackAlignment - SlotSize) ) {
2457 // Number smaller than 12 so just add the difference.
2458 Offset += ((StackAlignment - SlotSize) - (Offset & AlignMask));
2460 // Mask out lower bits, add stackalignment once plus the 12 bytes.
2461 Offset = ((~AlignMask) & Offset) + StackAlignment +
2462 (StackAlignment-SlotSize);
2467 /// MatchingStackOffset - Return true if the given stack call argument is
2468 /// already available in the same position (relatively) of the caller's
2469 /// incoming argument stack.
2471 bool MatchingStackOffset(SDValue Arg, unsigned Offset, ISD::ArgFlagsTy Flags,
2472 MachineFrameInfo *MFI, const MachineRegisterInfo *MRI,
2473 const X86InstrInfo *TII) {
2474 unsigned Bytes = Arg.getValueType().getSizeInBits() / 8;
2476 if (Arg.getOpcode() == ISD::CopyFromReg) {
2477 unsigned VR = cast<RegisterSDNode>(Arg.getOperand(1))->getReg();
2478 if (!TargetRegisterInfo::isVirtualRegister(VR))
2480 MachineInstr *Def = MRI->getVRegDef(VR);
2483 if (!Flags.isByVal()) {
2484 if (!TII->isLoadFromStackSlot(Def, FI))
2487 unsigned Opcode = Def->getOpcode();
2488 if ((Opcode == X86::LEA32r || Opcode == X86::LEA64r) &&
2489 Def->getOperand(1).isFI()) {
2490 FI = Def->getOperand(1).getIndex();
2491 Bytes = Flags.getByValSize();
2495 } else if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Arg)) {
2496 if (Flags.isByVal())
2497 // ByVal argument is passed in as a pointer but it's now being
2498 // dereferenced. e.g.
2499 // define @foo(%struct.X* %A) {
2500 // tail call @bar(%struct.X* byval %A)
2503 SDValue Ptr = Ld->getBasePtr();
2504 FrameIndexSDNode *FINode = dyn_cast<FrameIndexSDNode>(Ptr);
2507 FI = FINode->getIndex();
2511 assert(FI != INT_MAX);
2512 if (!MFI->isFixedObjectIndex(FI))
2514 return Offset == MFI->getObjectOffset(FI) && Bytes == MFI->getObjectSize(FI);
2517 /// IsEligibleForTailCallOptimization - Check whether the call is eligible
2518 /// for tail call optimization. Targets which want to do tail call
2519 /// optimization should implement this function.
2521 X86TargetLowering::IsEligibleForTailCallOptimization(SDValue Callee,
2522 CallingConv::ID CalleeCC,
2524 bool isCalleeStructRet,
2525 bool isCallerStructRet,
2526 const SmallVectorImpl<ISD::OutputArg> &Outs,
2527 const SmallVectorImpl<SDValue> &OutVals,
2528 const SmallVectorImpl<ISD::InputArg> &Ins,
2529 SelectionDAG& DAG) const {
2530 if (!IsTailCallConvention(CalleeCC) &&
2531 CalleeCC != CallingConv::C)
2534 // If -tailcallopt is specified, make fastcc functions tail-callable.
2535 const MachineFunction &MF = DAG.getMachineFunction();
2536 const Function *CallerF = DAG.getMachineFunction().getFunction();
2537 CallingConv::ID CallerCC = CallerF->getCallingConv();
2538 bool CCMatch = CallerCC == CalleeCC;
2540 if (GuaranteedTailCallOpt) {
2541 if (IsTailCallConvention(CalleeCC) && CCMatch)
2546 // Look for obvious safe cases to perform tail call optimization that do not
2547 // require ABI changes. This is what gcc calls sibcall.
2549 // Can't do sibcall if stack needs to be dynamically re-aligned. PEI needs to
2550 // emit a special epilogue.
2551 if (RegInfo->needsStackRealignment(MF))
2554 // Also avoid sibcall optimization if either caller or callee uses struct
2555 // return semantics.
2556 if (isCalleeStructRet || isCallerStructRet)
2559 // Do not sibcall optimize vararg calls unless all arguments are passed via
2561 if (isVarArg && !Outs.empty()) {
2563 // Optimizing for varargs on Win64 is unlikely to be safe without
2564 // additional testing.
2565 if (Subtarget->isTargetWin64())
2568 SmallVector<CCValAssign, 16> ArgLocs;
2569 CCState CCInfo(CalleeCC, isVarArg, DAG.getMachineFunction(),
2570 getTargetMachine(), ArgLocs, *DAG.getContext());
2572 CCInfo.AnalyzeCallOperands(Outs, CC_X86);
2573 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i)
2574 if (!ArgLocs[i].isRegLoc())
2578 // If the call result is in ST0 / ST1, it needs to be popped off the x87 stack.
2579 // Therefore if it's not used by the call it is not safe to optimize this into
2581 bool Unused = false;
2582 for (unsigned i = 0, e = Ins.size(); i != e; ++i) {
2589 SmallVector<CCValAssign, 16> RVLocs;
2590 CCState CCInfo(CalleeCC, false, DAG.getMachineFunction(),
2591 getTargetMachine(), RVLocs, *DAG.getContext());
2592 CCInfo.AnalyzeCallResult(Ins, RetCC_X86);
2593 for (unsigned i = 0, e = RVLocs.size(); i != e; ++i) {
2594 CCValAssign &VA = RVLocs[i];
2595 if (VA.getLocReg() == X86::ST0 || VA.getLocReg() == X86::ST1)
2600 // If the calling conventions do not match, then we'd better make sure the
2601 // results are returned in the same way as what the caller expects.
2603 SmallVector<CCValAssign, 16> RVLocs1;
2604 CCState CCInfo1(CalleeCC, false, DAG.getMachineFunction(),
2605 getTargetMachine(), RVLocs1, *DAG.getContext());
2606 CCInfo1.AnalyzeCallResult(Ins, RetCC_X86);
2608 SmallVector<CCValAssign, 16> RVLocs2;
2609 CCState CCInfo2(CallerCC, false, DAG.getMachineFunction(),
2610 getTargetMachine(), RVLocs2, *DAG.getContext());
2611 CCInfo2.AnalyzeCallResult(Ins, RetCC_X86);
2613 if (RVLocs1.size() != RVLocs2.size())
2615 for (unsigned i = 0, e = RVLocs1.size(); i != e; ++i) {
2616 if (RVLocs1[i].isRegLoc() != RVLocs2[i].isRegLoc())
2618 if (RVLocs1[i].getLocInfo() != RVLocs2[i].getLocInfo())
2620 if (RVLocs1[i].isRegLoc()) {
2621 if (RVLocs1[i].getLocReg() != RVLocs2[i].getLocReg())
2624 if (RVLocs1[i].getLocMemOffset() != RVLocs2[i].getLocMemOffset())
2630 // If the callee takes no arguments then go on to check the results of the
2632 if (!Outs.empty()) {
2633 // Check if stack adjustment is needed. For now, do not do this if any
2634 // argument is passed on the stack.
2635 SmallVector<CCValAssign, 16> ArgLocs;
2636 CCState CCInfo(CalleeCC, isVarArg, DAG.getMachineFunction(),
2637 getTargetMachine(), ArgLocs, *DAG.getContext());
2639 // Allocate shadow area for Win64
2640 if (Subtarget->isTargetWin64()) {
2641 CCInfo.AllocateStack(32, 8);
2644 CCInfo.AnalyzeCallOperands(Outs, CC_X86);
2645 if (CCInfo.getNextStackOffset()) {
2646 MachineFunction &MF = DAG.getMachineFunction();
2647 if (MF.getInfo<X86MachineFunctionInfo>()->getBytesToPopOnReturn())
2650 // Check if the arguments are already laid out in the right way as
2651 // the caller's fixed stack objects.
2652 MachineFrameInfo *MFI = MF.getFrameInfo();
2653 const MachineRegisterInfo *MRI = &MF.getRegInfo();
2654 const X86InstrInfo *TII =
2655 ((X86TargetMachine&)getTargetMachine()).getInstrInfo();
2656 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2657 CCValAssign &VA = ArgLocs[i];
2658 SDValue Arg = OutVals[i];
2659 ISD::ArgFlagsTy Flags = Outs[i].Flags;
2660 if (VA.getLocInfo() == CCValAssign::Indirect)
2662 if (!VA.isRegLoc()) {
2663 if (!MatchingStackOffset(Arg, VA.getLocMemOffset(), Flags,
2670 // If the tailcall address may be in a register, then make sure it's
2671 // possible to register allocate for it. In 32-bit, the call address can
2672 // only target EAX, EDX, or ECX since the tail call must be scheduled after
2673 // callee-saved registers are restored. These happen to be the same
2674 // registers used to pass 'inreg' arguments so watch out for those.
2675 if (!Subtarget->is64Bit() &&
2676 !isa<GlobalAddressSDNode>(Callee) &&
2677 !isa<ExternalSymbolSDNode>(Callee)) {
2678 unsigned NumInRegs = 0;
2679 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2680 CCValAssign &VA = ArgLocs[i];
2683 unsigned Reg = VA.getLocReg();
2686 case X86::EAX: case X86::EDX: case X86::ECX:
2687 if (++NumInRegs == 3)
2695 // An stdcall caller is expected to clean up its arguments; the callee
2696 // isn't going to do that.
2697 if (!CCMatch && CallerCC==CallingConv::X86_StdCall)
2704 X86TargetLowering::createFastISel(FunctionLoweringInfo &funcInfo) const {
2705 return X86::createFastISel(funcInfo);
2709 //===----------------------------------------------------------------------===//
2710 // Other Lowering Hooks
2711 //===----------------------------------------------------------------------===//
2713 static bool MayFoldLoad(SDValue Op) {
2714 return Op.hasOneUse() && ISD::isNormalLoad(Op.getNode());
2717 static bool MayFoldIntoStore(SDValue Op) {
2718 return Op.hasOneUse() && ISD::isNormalStore(*Op.getNode()->use_begin());
2721 static bool isTargetShuffle(unsigned Opcode) {
2723 default: return false;
2724 case X86ISD::PSHUFD:
2725 case X86ISD::PSHUFHW:
2726 case X86ISD::PSHUFLW:
2727 case X86ISD::SHUFPD:
2728 case X86ISD::PALIGN:
2729 case X86ISD::SHUFPS:
2730 case X86ISD::MOVLHPS:
2731 case X86ISD::MOVLHPD:
2732 case X86ISD::MOVHLPS:
2733 case X86ISD::MOVLPS:
2734 case X86ISD::MOVLPD:
2735 case X86ISD::MOVSHDUP:
2736 case X86ISD::MOVSLDUP:
2737 case X86ISD::MOVDDUP:
2740 case X86ISD::UNPCKLPS:
2741 case X86ISD::UNPCKLPD:
2742 case X86ISD::VUNPCKLPS:
2743 case X86ISD::VUNPCKLPD:
2744 case X86ISD::VUNPCKLPSY:
2745 case X86ISD::VUNPCKLPDY:
2746 case X86ISD::PUNPCKLWD:
2747 case X86ISD::PUNPCKLBW:
2748 case X86ISD::PUNPCKLDQ:
2749 case X86ISD::PUNPCKLQDQ:
2750 case X86ISD::UNPCKHPS:
2751 case X86ISD::UNPCKHPD:
2752 case X86ISD::PUNPCKHWD:
2753 case X86ISD::PUNPCKHBW:
2754 case X86ISD::PUNPCKHDQ:
2755 case X86ISD::PUNPCKHQDQ:
2761 static SDValue getTargetShuffleNode(unsigned Opc, DebugLoc dl, EVT VT,
2762 SDValue V1, SelectionDAG &DAG) {
2764 default: llvm_unreachable("Unknown x86 shuffle node");
2765 case X86ISD::MOVSHDUP:
2766 case X86ISD::MOVSLDUP:
2767 case X86ISD::MOVDDUP:
2768 return DAG.getNode(Opc, dl, VT, V1);
2774 static SDValue getTargetShuffleNode(unsigned Opc, DebugLoc dl, EVT VT,
2775 SDValue V1, unsigned TargetMask, SelectionDAG &DAG) {
2777 default: llvm_unreachable("Unknown x86 shuffle node");
2778 case X86ISD::PSHUFD:
2779 case X86ISD::PSHUFHW:
2780 case X86ISD::PSHUFLW:
2781 return DAG.getNode(Opc, dl, VT, V1, DAG.getConstant(TargetMask, MVT::i8));
2787 static SDValue getTargetShuffleNode(unsigned Opc, DebugLoc dl, EVT VT,
2788 SDValue V1, SDValue V2, unsigned TargetMask, SelectionDAG &DAG) {
2790 default: llvm_unreachable("Unknown x86 shuffle node");
2791 case X86ISD::PALIGN:
2792 case X86ISD::SHUFPD:
2793 case X86ISD::SHUFPS:
2794 return DAG.getNode(Opc, dl, VT, V1, V2,
2795 DAG.getConstant(TargetMask, MVT::i8));
2800 static SDValue getTargetShuffleNode(unsigned Opc, DebugLoc dl, EVT VT,
2801 SDValue V1, SDValue V2, SelectionDAG &DAG) {
2803 default: llvm_unreachable("Unknown x86 shuffle node");
2804 case X86ISD::MOVLHPS:
2805 case X86ISD::MOVLHPD:
2806 case X86ISD::MOVHLPS:
2807 case X86ISD::MOVLPS:
2808 case X86ISD::MOVLPD:
2811 case X86ISD::UNPCKLPS:
2812 case X86ISD::UNPCKLPD:
2813 case X86ISD::VUNPCKLPS:
2814 case X86ISD::VUNPCKLPD:
2815 case X86ISD::VUNPCKLPSY:
2816 case X86ISD::VUNPCKLPDY:
2817 case X86ISD::PUNPCKLWD:
2818 case X86ISD::PUNPCKLBW:
2819 case X86ISD::PUNPCKLDQ:
2820 case X86ISD::PUNPCKLQDQ:
2821 case X86ISD::UNPCKHPS:
2822 case X86ISD::UNPCKHPD:
2823 case X86ISD::PUNPCKHWD:
2824 case X86ISD::PUNPCKHBW:
2825 case X86ISD::PUNPCKHDQ:
2826 case X86ISD::PUNPCKHQDQ:
2827 return DAG.getNode(Opc, dl, VT, V1, V2);
2832 SDValue X86TargetLowering::getReturnAddressFrameIndex(SelectionDAG &DAG) const {
2833 MachineFunction &MF = DAG.getMachineFunction();
2834 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
2835 int ReturnAddrIndex = FuncInfo->getRAIndex();
2837 if (ReturnAddrIndex == 0) {
2838 // Set up a frame object for the return address.
2839 uint64_t SlotSize = TD->getPointerSize();
2840 ReturnAddrIndex = MF.getFrameInfo()->CreateFixedObject(SlotSize, -SlotSize,
2842 FuncInfo->setRAIndex(ReturnAddrIndex);
2845 return DAG.getFrameIndex(ReturnAddrIndex, getPointerTy());
2849 bool X86::isOffsetSuitableForCodeModel(int64_t Offset, CodeModel::Model M,
2850 bool hasSymbolicDisplacement) {
2851 // Offset should fit into 32 bit immediate field.
2852 if (!isInt<32>(Offset))
2855 // If we don't have a symbolic displacement - we don't have any extra
2857 if (!hasSymbolicDisplacement)
2860 // FIXME: Some tweaks might be needed for medium code model.
2861 if (M != CodeModel::Small && M != CodeModel::Kernel)
2864 // For small code model we assume that latest object is 16MB before end of 31
2865 // bits boundary. We may also accept pretty large negative constants knowing
2866 // that all objects are in the positive half of address space.
2867 if (M == CodeModel::Small && Offset < 16*1024*1024)
2870 // For kernel code model we know that all object resist in the negative half
2871 // of 32bits address space. We may not accept negative offsets, since they may
2872 // be just off and we may accept pretty large positive ones.
2873 if (M == CodeModel::Kernel && Offset > 0)
2879 /// isCalleePop - Determines whether the callee is required to pop its
2880 /// own arguments. Callee pop is necessary to support tail calls.
2881 bool X86::isCalleePop(CallingConv::ID CallingConv,
2882 bool is64Bit, bool IsVarArg, bool TailCallOpt) {
2886 switch (CallingConv) {
2889 case CallingConv::X86_StdCall:
2891 case CallingConv::X86_FastCall:
2893 case CallingConv::X86_ThisCall:
2895 case CallingConv::Fast:
2897 case CallingConv::GHC:
2902 /// TranslateX86CC - do a one to one translation of a ISD::CondCode to the X86
2903 /// specific condition code, returning the condition code and the LHS/RHS of the
2904 /// comparison to make.
2905 static unsigned TranslateX86CC(ISD::CondCode SetCCOpcode, bool isFP,
2906 SDValue &LHS, SDValue &RHS, SelectionDAG &DAG) {
2908 if (ConstantSDNode *RHSC = dyn_cast<ConstantSDNode>(RHS)) {
2909 if (SetCCOpcode == ISD::SETGT && RHSC->isAllOnesValue()) {
2910 // X > -1 -> X == 0, jump !sign.
2911 RHS = DAG.getConstant(0, RHS.getValueType());
2912 return X86::COND_NS;
2913 } else if (SetCCOpcode == ISD::SETLT && RHSC->isNullValue()) {
2914 // X < 0 -> X == 0, jump on sign.
2916 } else if (SetCCOpcode == ISD::SETLT && RHSC->getZExtValue() == 1) {
2918 RHS = DAG.getConstant(0, RHS.getValueType());
2919 return X86::COND_LE;
2923 switch (SetCCOpcode) {
2924 default: llvm_unreachable("Invalid integer condition!");
2925 case ISD::SETEQ: return X86::COND_E;
2926 case ISD::SETGT: return X86::COND_G;
2927 case ISD::SETGE: return X86::COND_GE;
2928 case ISD::SETLT: return X86::COND_L;
2929 case ISD::SETLE: return X86::COND_LE;
2930 case ISD::SETNE: return X86::COND_NE;
2931 case ISD::SETULT: return X86::COND_B;
2932 case ISD::SETUGT: return X86::COND_A;
2933 case ISD::SETULE: return X86::COND_BE;
2934 case ISD::SETUGE: return X86::COND_AE;
2938 // First determine if it is required or is profitable to flip the operands.
2940 // If LHS is a foldable load, but RHS is not, flip the condition.
2941 if (ISD::isNON_EXTLoad(LHS.getNode()) &&
2942 !ISD::isNON_EXTLoad(RHS.getNode())) {
2943 SetCCOpcode = getSetCCSwappedOperands(SetCCOpcode);
2944 std::swap(LHS, RHS);
2947 switch (SetCCOpcode) {
2953 std::swap(LHS, RHS);
2957 // On a floating point condition, the flags are set as follows:
2959 // 0 | 0 | 0 | X > Y
2960 // 0 | 0 | 1 | X < Y
2961 // 1 | 0 | 0 | X == Y
2962 // 1 | 1 | 1 | unordered
2963 switch (SetCCOpcode) {
2964 default: llvm_unreachable("Condcode should be pre-legalized away");
2966 case ISD::SETEQ: return X86::COND_E;
2967 case ISD::SETOLT: // flipped
2969 case ISD::SETGT: return X86::COND_A;
2970 case ISD::SETOLE: // flipped
2972 case ISD::SETGE: return X86::COND_AE;
2973 case ISD::SETUGT: // flipped
2975 case ISD::SETLT: return X86::COND_B;
2976 case ISD::SETUGE: // flipped
2978 case ISD::SETLE: return X86::COND_BE;
2980 case ISD::SETNE: return X86::COND_NE;
2981 case ISD::SETUO: return X86::COND_P;
2982 case ISD::SETO: return X86::COND_NP;
2984 case ISD::SETUNE: return X86::COND_INVALID;
2988 /// hasFPCMov - is there a floating point cmov for the specific X86 condition
2989 /// code. Current x86 isa includes the following FP cmov instructions:
2990 /// fcmovb, fcomvbe, fcomve, fcmovu, fcmovae, fcmova, fcmovne, fcmovnu.
2991 static bool hasFPCMov(unsigned X86CC) {
3007 /// isFPImmLegal - Returns true if the target can instruction select the
3008 /// specified FP immediate natively. If false, the legalizer will
3009 /// materialize the FP immediate as a load from a constant pool.
3010 bool X86TargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT) const {
3011 for (unsigned i = 0, e = LegalFPImmediates.size(); i != e; ++i) {
3012 if (Imm.bitwiseIsEqual(LegalFPImmediates[i]))
3018 /// isUndefOrInRange - Return true if Val is undef or if its value falls within
3019 /// the specified range (L, H].
3020 static bool isUndefOrInRange(int Val, int Low, int Hi) {
3021 return (Val < 0) || (Val >= Low && Val < Hi);
3024 /// isUndefOrEqual - Val is either less than zero (undef) or equal to the
3025 /// specified value.
3026 static bool isUndefOrEqual(int Val, int CmpVal) {
3027 if (Val < 0 || Val == CmpVal)
3032 /// isPSHUFDMask - Return true if the node specifies a shuffle of elements that
3033 /// is suitable for input to PSHUFD or PSHUFW. That is, it doesn't reference
3034 /// the second operand.
3035 static bool isPSHUFDMask(const SmallVectorImpl<int> &Mask, EVT VT) {
3036 if (VT == MVT::v4f32 || VT == MVT::v4i32 )
3037 return (Mask[0] < 4 && Mask[1] < 4 && Mask[2] < 4 && Mask[3] < 4);
3038 if (VT == MVT::v2f64 || VT == MVT::v2i64)
3039 return (Mask[0] < 2 && Mask[1] < 2);
3043 bool X86::isPSHUFDMask(ShuffleVectorSDNode *N) {
3044 SmallVector<int, 8> M;
3046 return ::isPSHUFDMask(M, N->getValueType(0));
3049 /// isPSHUFHWMask - Return true if the node specifies a shuffle of elements that
3050 /// is suitable for input to PSHUFHW.
3051 static bool isPSHUFHWMask(const SmallVectorImpl<int> &Mask, EVT VT) {
3052 if (VT != MVT::v8i16)
3055 // Lower quadword copied in order or undef.
3056 for (int i = 0; i != 4; ++i)
3057 if (Mask[i] >= 0 && Mask[i] != i)
3060 // Upper quadword shuffled.
3061 for (int i = 4; i != 8; ++i)
3062 if (Mask[i] >= 0 && (Mask[i] < 4 || Mask[i] > 7))
3068 bool X86::isPSHUFHWMask(ShuffleVectorSDNode *N) {
3069 SmallVector<int, 8> M;
3071 return ::isPSHUFHWMask(M, N->getValueType(0));
3074 /// isPSHUFLWMask - Return true if the node specifies a shuffle of elements that
3075 /// is suitable for input to PSHUFLW.
3076 static bool isPSHUFLWMask(const SmallVectorImpl<int> &Mask, EVT VT) {
3077 if (VT != MVT::v8i16)
3080 // Upper quadword copied in order.
3081 for (int i = 4; i != 8; ++i)
3082 if (Mask[i] >= 0 && Mask[i] != i)
3085 // Lower quadword shuffled.
3086 for (int i = 0; i != 4; ++i)
3093 bool X86::isPSHUFLWMask(ShuffleVectorSDNode *N) {
3094 SmallVector<int, 8> M;
3096 return ::isPSHUFLWMask(M, N->getValueType(0));
3099 /// isPALIGNRMask - Return true if the node specifies a shuffle of elements that
3100 /// is suitable for input to PALIGNR.
3101 static bool isPALIGNRMask(const SmallVectorImpl<int> &Mask, EVT VT,
3103 int i, e = VT.getVectorNumElements();
3105 // Do not handle v2i64 / v2f64 shuffles with palignr.
3106 if (e < 4 || !hasSSSE3)
3109 for (i = 0; i != e; ++i)
3113 // All undef, not a palignr.
3117 // Determine if it's ok to perform a palignr with only the LHS, since we
3118 // don't have access to the actual shuffle elements to see if RHS is undef.
3119 bool Unary = Mask[i] < (int)e;
3120 bool NeedsUnary = false;
3122 int s = Mask[i] - i;
3124 // Check the rest of the elements to see if they are consecutive.
3125 for (++i; i != e; ++i) {
3130 Unary = Unary && (m < (int)e);
3131 NeedsUnary = NeedsUnary || (m < s);
3133 if (NeedsUnary && !Unary)
3135 if (Unary && m != ((s+i) & (e-1)))
3137 if (!Unary && m != (s+i))
3143 bool X86::isPALIGNRMask(ShuffleVectorSDNode *N) {
3144 SmallVector<int, 8> M;
3146 return ::isPALIGNRMask(M, N->getValueType(0), true);
3149 /// isSHUFPMask - Return true if the specified VECTOR_SHUFFLE operand
3150 /// specifies a shuffle of elements that is suitable for input to SHUFP*.
3151 static bool isSHUFPMask(const SmallVectorImpl<int> &Mask, EVT VT) {
3152 int NumElems = VT.getVectorNumElements();
3153 if (NumElems != 2 && NumElems != 4)
3156 int Half = NumElems / 2;
3157 for (int i = 0; i < Half; ++i)
3158 if (!isUndefOrInRange(Mask[i], 0, NumElems))
3160 for (int i = Half; i < NumElems; ++i)
3161 if (!isUndefOrInRange(Mask[i], NumElems, NumElems*2))
3167 bool X86::isSHUFPMask(ShuffleVectorSDNode *N) {
3168 SmallVector<int, 8> M;
3170 return ::isSHUFPMask(M, N->getValueType(0));
3173 /// isCommutedSHUFP - Returns true if the shuffle mask is exactly
3174 /// the reverse of what x86 shuffles want. x86 shuffles requires the lower
3175 /// half elements to come from vector 1 (which would equal the dest.) and
3176 /// the upper half to come from vector 2.
3177 static bool isCommutedSHUFPMask(const SmallVectorImpl<int> &Mask, EVT VT) {
3178 int NumElems = VT.getVectorNumElements();
3180 if (NumElems != 2 && NumElems != 4)
3183 int Half = NumElems / 2;
3184 for (int i = 0; i < Half; ++i)
3185 if (!isUndefOrInRange(Mask[i], NumElems, NumElems*2))
3187 for (int i = Half; i < NumElems; ++i)
3188 if (!isUndefOrInRange(Mask[i], 0, NumElems))
3193 static bool isCommutedSHUFP(ShuffleVectorSDNode *N) {
3194 SmallVector<int, 8> M;
3196 return isCommutedSHUFPMask(M, N->getValueType(0));
3199 /// isMOVHLPSMask - Return true if the specified VECTOR_SHUFFLE operand
3200 /// specifies a shuffle of elements that is suitable for input to MOVHLPS.
3201 bool X86::isMOVHLPSMask(ShuffleVectorSDNode *N) {
3202 if (N->getValueType(0).getVectorNumElements() != 4)
3205 // Expect bit0 == 6, bit1 == 7, bit2 == 2, bit3 == 3
3206 return isUndefOrEqual(N->getMaskElt(0), 6) &&
3207 isUndefOrEqual(N->getMaskElt(1), 7) &&
3208 isUndefOrEqual(N->getMaskElt(2), 2) &&
3209 isUndefOrEqual(N->getMaskElt(3), 3);
3212 /// isMOVHLPS_v_undef_Mask - Special case of isMOVHLPSMask for canonical form
3213 /// of vector_shuffle v, v, <2, 3, 2, 3>, i.e. vector_shuffle v, undef,
3215 bool X86::isMOVHLPS_v_undef_Mask(ShuffleVectorSDNode *N) {
3216 unsigned NumElems = N->getValueType(0).getVectorNumElements();
3221 return isUndefOrEqual(N->getMaskElt(0), 2) &&
3222 isUndefOrEqual(N->getMaskElt(1), 3) &&
3223 isUndefOrEqual(N->getMaskElt(2), 2) &&
3224 isUndefOrEqual(N->getMaskElt(3), 3);
3227 /// isMOVLPMask - Return true if the specified VECTOR_SHUFFLE operand
3228 /// specifies a shuffle of elements that is suitable for input to MOVLP{S|D}.
3229 bool X86::isMOVLPMask(ShuffleVectorSDNode *N) {
3230 unsigned NumElems = N->getValueType(0).getVectorNumElements();
3232 if (NumElems != 2 && NumElems != 4)
3235 for (unsigned i = 0; i < NumElems/2; ++i)
3236 if (!isUndefOrEqual(N->getMaskElt(i), i + NumElems))
3239 for (unsigned i = NumElems/2; i < NumElems; ++i)
3240 if (!isUndefOrEqual(N->getMaskElt(i), i))
3246 /// isMOVLHPSMask - Return true if the specified VECTOR_SHUFFLE operand
3247 /// specifies a shuffle of elements that is suitable for input to MOVLHPS.
3248 bool X86::isMOVLHPSMask(ShuffleVectorSDNode *N) {
3249 unsigned NumElems = N->getValueType(0).getVectorNumElements();
3251 if ((NumElems != 2 && NumElems != 4)
3252 || N->getValueType(0).getSizeInBits() > 128)
3255 for (unsigned i = 0; i < NumElems/2; ++i)
3256 if (!isUndefOrEqual(N->getMaskElt(i), i))
3259 for (unsigned i = 0; i < NumElems/2; ++i)
3260 if (!isUndefOrEqual(N->getMaskElt(i + NumElems/2), i + NumElems))
3266 /// isUNPCKLMask - Return true if the specified VECTOR_SHUFFLE operand
3267 /// specifies a shuffle of elements that is suitable for input to UNPCKL.
3268 static bool isUNPCKLMask(const SmallVectorImpl<int> &Mask, EVT VT,
3269 bool V2IsSplat = false) {
3270 int NumElts = VT.getVectorNumElements();
3271 if (NumElts != 2 && NumElts != 4 && NumElts != 8 && NumElts != 16)
3274 // Handle vector lengths > 128 bits. Define a "section" as a set of
3275 // 128 bits. AVX defines UNPCK* to operate independently on 128-bit
3277 unsigned NumSections = VT.getSizeInBits() / 128;
3278 if (NumSections == 0 ) NumSections = 1; // Handle MMX
3279 unsigned NumSectionElts = NumElts / NumSections;
3282 unsigned End = NumSectionElts;
3283 for (unsigned s = 0; s < NumSections; ++s) {
3284 for (unsigned i = Start, j = s * NumSectionElts;
3288 int BitI1 = Mask[i+1];
3289 if (!isUndefOrEqual(BitI, j))
3292 if (!isUndefOrEqual(BitI1, NumElts))
3295 if (!isUndefOrEqual(BitI1, j + NumElts))
3299 // Process the next 128 bits.
3300 Start += NumSectionElts;
3301 End += NumSectionElts;
3307 bool X86::isUNPCKLMask(ShuffleVectorSDNode *N, bool V2IsSplat) {
3308 SmallVector<int, 8> M;
3310 return ::isUNPCKLMask(M, N->getValueType(0), V2IsSplat);
3313 /// isUNPCKHMask - Return true if the specified VECTOR_SHUFFLE operand
3314 /// specifies a shuffle of elements that is suitable for input to UNPCKH.
3315 static bool isUNPCKHMask(const SmallVectorImpl<int> &Mask, EVT VT,
3316 bool V2IsSplat = false) {
3317 int NumElts = VT.getVectorNumElements();
3318 if (NumElts != 2 && NumElts != 4 && NumElts != 8 && NumElts != 16)
3321 for (int i = 0, j = 0; i != NumElts; i += 2, ++j) {
3323 int BitI1 = Mask[i+1];
3324 if (!isUndefOrEqual(BitI, j + NumElts/2))
3327 if (isUndefOrEqual(BitI1, NumElts))
3330 if (!isUndefOrEqual(BitI1, j + NumElts/2 + NumElts))
3337 bool X86::isUNPCKHMask(ShuffleVectorSDNode *N, bool V2IsSplat) {
3338 SmallVector<int, 8> M;
3340 return ::isUNPCKHMask(M, N->getValueType(0), V2IsSplat);
3343 /// isUNPCKL_v_undef_Mask - Special case of isUNPCKLMask for canonical form
3344 /// of vector_shuffle v, v, <0, 4, 1, 5>, i.e. vector_shuffle v, undef,
3346 static bool isUNPCKL_v_undef_Mask(const SmallVectorImpl<int> &Mask, EVT VT) {
3347 int NumElems = VT.getVectorNumElements();
3348 if (NumElems != 2 && NumElems != 4 && NumElems != 8 && NumElems != 16)
3351 // Handle vector lengths > 128 bits. Define a "section" as a set of
3352 // 128 bits. AVX defines UNPCK* to operate independently on 128-bit
3354 unsigned NumSections = VT.getSizeInBits() / 128;
3355 if (NumSections == 0 ) NumSections = 1; // Handle MMX
3356 unsigned NumSectionElts = NumElems / NumSections;
3358 for (unsigned s = 0; s < NumSections; ++s) {
3359 for (unsigned i = s * NumSectionElts, j = s * NumSectionElts;
3360 i != NumSectionElts * (s + 1);
3363 int BitI1 = Mask[i+1];
3365 if (!isUndefOrEqual(BitI, j))
3367 if (!isUndefOrEqual(BitI1, j))
3375 bool X86::isUNPCKL_v_undef_Mask(ShuffleVectorSDNode *N) {
3376 SmallVector<int, 8> M;
3378 return ::isUNPCKL_v_undef_Mask(M, N->getValueType(0));
3381 /// isUNPCKH_v_undef_Mask - Special case of isUNPCKHMask for canonical form
3382 /// of vector_shuffle v, v, <2, 6, 3, 7>, i.e. vector_shuffle v, undef,
3384 static bool isUNPCKH_v_undef_Mask(const SmallVectorImpl<int> &Mask, EVT VT) {
3385 int NumElems = VT.getVectorNumElements();
3386 if (NumElems != 2 && NumElems != 4 && NumElems != 8 && NumElems != 16)
3389 for (int i = 0, j = NumElems / 2; i != NumElems; i += 2, ++j) {
3391 int BitI1 = Mask[i+1];
3392 if (!isUndefOrEqual(BitI, j))
3394 if (!isUndefOrEqual(BitI1, j))
3400 bool X86::isUNPCKH_v_undef_Mask(ShuffleVectorSDNode *N) {
3401 SmallVector<int, 8> M;
3403 return ::isUNPCKH_v_undef_Mask(M, N->getValueType(0));
3406 /// isMOVLMask - Return true if the specified VECTOR_SHUFFLE operand
3407 /// specifies a shuffle of elements that is suitable for input to MOVSS,
3408 /// MOVSD, and MOVD, i.e. setting the lowest element.
3409 static bool isMOVLMask(const SmallVectorImpl<int> &Mask, EVT VT) {
3410 if (VT.getVectorElementType().getSizeInBits() < 32)
3413 int NumElts = VT.getVectorNumElements();
3415 if (!isUndefOrEqual(Mask[0], NumElts))
3418 for (int i = 1; i < NumElts; ++i)
3419 if (!isUndefOrEqual(Mask[i], i))
3425 bool X86::isMOVLMask(ShuffleVectorSDNode *N) {
3426 SmallVector<int, 8> M;
3428 return ::isMOVLMask(M, N->getValueType(0));
3431 /// isCommutedMOVL - Returns true if the shuffle mask is except the reverse
3432 /// of what x86 movss want. X86 movs requires the lowest element to be lowest
3433 /// element of vector 2 and the other elements to come from vector 1 in order.
3434 static bool isCommutedMOVLMask(const SmallVectorImpl<int> &Mask, EVT VT,
3435 bool V2IsSplat = false, bool V2IsUndef = false) {
3436 int NumOps = VT.getVectorNumElements();
3437 if (NumOps != 2 && NumOps != 4 && NumOps != 8 && NumOps != 16)
3440 if (!isUndefOrEqual(Mask[0], 0))
3443 for (int i = 1; i < NumOps; ++i)
3444 if (!(isUndefOrEqual(Mask[i], i+NumOps) ||
3445 (V2IsUndef && isUndefOrInRange(Mask[i], NumOps, NumOps*2)) ||
3446 (V2IsSplat && isUndefOrEqual(Mask[i], NumOps))))
3452 static bool isCommutedMOVL(ShuffleVectorSDNode *N, bool V2IsSplat = false,
3453 bool V2IsUndef = false) {
3454 SmallVector<int, 8> M;
3456 return isCommutedMOVLMask(M, N->getValueType(0), V2IsSplat, V2IsUndef);
3459 /// isMOVSHDUPMask - Return true if the specified VECTOR_SHUFFLE operand
3460 /// specifies a shuffle of elements that is suitable for input to MOVSHDUP.
3461 bool X86::isMOVSHDUPMask(ShuffleVectorSDNode *N) {
3462 if (N->getValueType(0).getVectorNumElements() != 4)
3465 // Expect 1, 1, 3, 3
3466 for (unsigned i = 0; i < 2; ++i) {
3467 int Elt = N->getMaskElt(i);
3468 if (Elt >= 0 && Elt != 1)
3473 for (unsigned i = 2; i < 4; ++i) {
3474 int Elt = N->getMaskElt(i);
3475 if (Elt >= 0 && Elt != 3)
3480 // Don't use movshdup if it can be done with a shufps.
3481 // FIXME: verify that matching u, u, 3, 3 is what we want.
3485 /// isMOVSLDUPMask - Return true if the specified VECTOR_SHUFFLE operand
3486 /// specifies a shuffle of elements that is suitable for input to MOVSLDUP.
3487 bool X86::isMOVSLDUPMask(ShuffleVectorSDNode *N) {
3488 if (N->getValueType(0).getVectorNumElements() != 4)
3491 // Expect 0, 0, 2, 2
3492 for (unsigned i = 0; i < 2; ++i)
3493 if (N->getMaskElt(i) > 0)
3497 for (unsigned i = 2; i < 4; ++i) {
3498 int Elt = N->getMaskElt(i);
3499 if (Elt >= 0 && Elt != 2)
3504 // Don't use movsldup if it can be done with a shufps.
3508 /// isMOVDDUPMask - Return true if the specified VECTOR_SHUFFLE operand
3509 /// specifies a shuffle of elements that is suitable for input to MOVDDUP.
3510 bool X86::isMOVDDUPMask(ShuffleVectorSDNode *N) {
3511 int e = N->getValueType(0).getVectorNumElements() / 2;
3513 for (int i = 0; i < e; ++i)
3514 if (!isUndefOrEqual(N->getMaskElt(i), i))
3516 for (int i = 0; i < e; ++i)
3517 if (!isUndefOrEqual(N->getMaskElt(e+i), i))
3522 /// isVEXTRACTF128Index - Return true if the specified
3523 /// EXTRACT_SUBVECTOR operand specifies a vector extract that is
3524 /// suitable for input to VEXTRACTF128.
3525 bool X86::isVEXTRACTF128Index(SDNode *N) {
3526 if (!isa<ConstantSDNode>(N->getOperand(1).getNode()))
3529 // The index should be aligned on a 128-bit boundary.
3531 cast<ConstantSDNode>(N->getOperand(1).getNode())->getZExtValue();
3533 unsigned VL = N->getValueType(0).getVectorNumElements();
3534 unsigned VBits = N->getValueType(0).getSizeInBits();
3535 unsigned ElSize = VBits / VL;
3536 bool Result = (Index * ElSize) % 128 == 0;
3541 /// isVINSERTF128Index - Return true if the specified INSERT_SUBVECTOR
3542 /// operand specifies a subvector insert that is suitable for input to
3544 bool X86::isVINSERTF128Index(SDNode *N) {
3545 if (!isa<ConstantSDNode>(N->getOperand(2).getNode()))
3548 // The index should be aligned on a 128-bit boundary.
3550 cast<ConstantSDNode>(N->getOperand(2).getNode())->getZExtValue();
3552 unsigned VL = N->getValueType(0).getVectorNumElements();
3553 unsigned VBits = N->getValueType(0).getSizeInBits();
3554 unsigned ElSize = VBits / VL;
3555 bool Result = (Index * ElSize) % 128 == 0;
3560 /// getShuffleSHUFImmediate - Return the appropriate immediate to shuffle
3561 /// the specified VECTOR_SHUFFLE mask with PSHUF* and SHUFP* instructions.
3562 unsigned X86::getShuffleSHUFImmediate(SDNode *N) {
3563 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);
3564 int NumOperands = SVOp->getValueType(0).getVectorNumElements();
3566 unsigned Shift = (NumOperands == 4) ? 2 : 1;
3568 for (int i = 0; i < NumOperands; ++i) {
3569 int Val = SVOp->getMaskElt(NumOperands-i-1);
3570 if (Val < 0) Val = 0;
3571 if (Val >= NumOperands) Val -= NumOperands;
3573 if (i != NumOperands - 1)
3579 /// getShufflePSHUFHWImmediate - Return the appropriate immediate to shuffle
3580 /// the specified VECTOR_SHUFFLE mask with the PSHUFHW instruction.
3581 unsigned X86::getShufflePSHUFHWImmediate(SDNode *N) {
3582 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);
3584 // 8 nodes, but we only care about the last 4.
3585 for (unsigned i = 7; i >= 4; --i) {
3586 int Val = SVOp->getMaskElt(i);
3595 /// getShufflePSHUFLWImmediate - Return the appropriate immediate to shuffle
3596 /// the specified VECTOR_SHUFFLE mask with the PSHUFLW instruction.
3597 unsigned X86::getShufflePSHUFLWImmediate(SDNode *N) {
3598 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);
3600 // 8 nodes, but we only care about the first 4.
3601 for (int i = 3; i >= 0; --i) {
3602 int Val = SVOp->getMaskElt(i);
3611 /// getShufflePALIGNRImmediate - Return the appropriate immediate to shuffle
3612 /// the specified VECTOR_SHUFFLE mask with the PALIGNR instruction.
3613 unsigned X86::getShufflePALIGNRImmediate(SDNode *N) {
3614 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);
3615 EVT VVT = N->getValueType(0);
3616 unsigned EltSize = VVT.getVectorElementType().getSizeInBits() >> 3;
3620 for (i = 0, e = VVT.getVectorNumElements(); i != e; ++i) {
3621 Val = SVOp->getMaskElt(i);
3625 return (Val - i) * EltSize;
3628 /// getExtractVEXTRACTF128Immediate - Return the appropriate immediate
3629 /// to extract the specified EXTRACT_SUBVECTOR index with VEXTRACTF128
3631 unsigned X86::getExtractVEXTRACTF128Immediate(SDNode *N) {
3632 if (!isa<ConstantSDNode>(N->getOperand(1).getNode()))
3633 llvm_unreachable("Illegal extract subvector for VEXTRACTF128");
3636 cast<ConstantSDNode>(N->getOperand(1).getNode())->getZExtValue();
3638 EVT VecVT = N->getOperand(0).getValueType();
3639 EVT ElVT = VecVT.getVectorElementType();
3641 unsigned NumElemsPerChunk = 128 / ElVT.getSizeInBits();
3643 return Index / NumElemsPerChunk;
3646 /// getInsertVINSERTF128Immediate - Return the appropriate immediate
3647 /// to insert at the specified INSERT_SUBVECTOR index with VINSERTF128
3649 unsigned X86::getInsertVINSERTF128Immediate(SDNode *N) {
3650 if (!isa<ConstantSDNode>(N->getOperand(2).getNode()))
3651 llvm_unreachable("Illegal insert subvector for VINSERTF128");
3654 cast<ConstantSDNode>(N->getOperand(2).getNode())->getZExtValue();
3656 EVT VecVT = N->getValueType(0);
3657 EVT ElVT = VecVT.getVectorElementType();
3659 unsigned NumElemsPerChunk = 128 / ElVT.getSizeInBits();
3661 return Index / NumElemsPerChunk;
3664 /// isZeroNode - Returns true if Elt is a constant zero or a floating point
3666 bool X86::isZeroNode(SDValue Elt) {
3667 return ((isa<ConstantSDNode>(Elt) &&
3668 cast<ConstantSDNode>(Elt)->isNullValue()) ||
3669 (isa<ConstantFPSDNode>(Elt) &&
3670 cast<ConstantFPSDNode>(Elt)->getValueAPF().isPosZero()));
3673 /// CommuteVectorShuffle - Swap vector_shuffle operands as well as values in
3674 /// their permute mask.
3675 static SDValue CommuteVectorShuffle(ShuffleVectorSDNode *SVOp,
3676 SelectionDAG &DAG) {
3677 EVT VT = SVOp->getValueType(0);
3678 unsigned NumElems = VT.getVectorNumElements();
3679 SmallVector<int, 8> MaskVec;
3681 for (unsigned i = 0; i != NumElems; ++i) {
3682 int idx = SVOp->getMaskElt(i);
3684 MaskVec.push_back(idx);
3685 else if (idx < (int)NumElems)
3686 MaskVec.push_back(idx + NumElems);
3688 MaskVec.push_back(idx - NumElems);
3690 return DAG.getVectorShuffle(VT, SVOp->getDebugLoc(), SVOp->getOperand(1),
3691 SVOp->getOperand(0), &MaskVec[0]);
3694 /// CommuteVectorShuffleMask - Change values in a shuffle permute mask assuming
3695 /// the two vector operands have swapped position.
3696 static void CommuteVectorShuffleMask(SmallVectorImpl<int> &Mask, EVT VT) {
3697 unsigned NumElems = VT.getVectorNumElements();
3698 for (unsigned i = 0; i != NumElems; ++i) {
3702 else if (idx < (int)NumElems)
3703 Mask[i] = idx + NumElems;
3705 Mask[i] = idx - NumElems;
3709 /// ShouldXformToMOVHLPS - Return true if the node should be transformed to
3710 /// match movhlps. The lower half elements should come from upper half of
3711 /// V1 (and in order), and the upper half elements should come from the upper
3712 /// half of V2 (and in order).
3713 static bool ShouldXformToMOVHLPS(ShuffleVectorSDNode *Op) {
3714 if (Op->getValueType(0).getVectorNumElements() != 4)
3716 for (unsigned i = 0, e = 2; i != e; ++i)
3717 if (!isUndefOrEqual(Op->getMaskElt(i), i+2))
3719 for (unsigned i = 2; i != 4; ++i)
3720 if (!isUndefOrEqual(Op->getMaskElt(i), i+4))
3725 /// isScalarLoadToVector - Returns true if the node is a scalar load that
3726 /// is promoted to a vector. It also returns the LoadSDNode by reference if
3728 static bool isScalarLoadToVector(SDNode *N, LoadSDNode **LD = NULL) {
3729 if (N->getOpcode() != ISD::SCALAR_TO_VECTOR)
3731 N = N->getOperand(0).getNode();
3732 if (!ISD::isNON_EXTLoad(N))
3735 *LD = cast<LoadSDNode>(N);
3739 /// ShouldXformToMOVLP{S|D} - Return true if the node should be transformed to
3740 /// match movlp{s|d}. The lower half elements should come from lower half of
3741 /// V1 (and in order), and the upper half elements should come from the upper
3742 /// half of V2 (and in order). And since V1 will become the source of the
3743 /// MOVLP, it must be either a vector load or a scalar load to vector.
3744 static bool ShouldXformToMOVLP(SDNode *V1, SDNode *V2,
3745 ShuffleVectorSDNode *Op) {
3746 if (!ISD::isNON_EXTLoad(V1) && !isScalarLoadToVector(V1))
3748 // Is V2 is a vector load, don't do this transformation. We will try to use
3749 // load folding shufps op.
3750 if (ISD::isNON_EXTLoad(V2))
3753 unsigned NumElems = Op->getValueType(0).getVectorNumElements();
3755 if (NumElems != 2 && NumElems != 4)
3757 for (unsigned i = 0, e = NumElems/2; i != e; ++i)
3758 if (!isUndefOrEqual(Op->getMaskElt(i), i))
3760 for (unsigned i = NumElems/2; i != NumElems; ++i)
3761 if (!isUndefOrEqual(Op->getMaskElt(i), i+NumElems))
3766 /// isSplatVector - Returns true if N is a BUILD_VECTOR node whose elements are
3768 static bool isSplatVector(SDNode *N) {
3769 if (N->getOpcode() != ISD::BUILD_VECTOR)
3772 SDValue SplatValue = N->getOperand(0);
3773 for (unsigned i = 1, e = N->getNumOperands(); i != e; ++i)
3774 if (N->getOperand(i) != SplatValue)
3779 /// isZeroShuffle - Returns true if N is a VECTOR_SHUFFLE that can be resolved
3780 /// to an zero vector.
3781 /// FIXME: move to dag combiner / method on ShuffleVectorSDNode
3782 static bool isZeroShuffle(ShuffleVectorSDNode *N) {
3783 SDValue V1 = N->getOperand(0);
3784 SDValue V2 = N->getOperand(1);
3785 unsigned NumElems = N->getValueType(0).getVectorNumElements();
3786 for (unsigned i = 0; i != NumElems; ++i) {
3787 int Idx = N->getMaskElt(i);
3788 if (Idx >= (int)NumElems) {
3789 unsigned Opc = V2.getOpcode();
3790 if (Opc == ISD::UNDEF || ISD::isBuildVectorAllZeros(V2.getNode()))
3792 if (Opc != ISD::BUILD_VECTOR ||
3793 !X86::isZeroNode(V2.getOperand(Idx-NumElems)))
3795 } else if (Idx >= 0) {
3796 unsigned Opc = V1.getOpcode();
3797 if (Opc == ISD::UNDEF || ISD::isBuildVectorAllZeros(V1.getNode()))
3799 if (Opc != ISD::BUILD_VECTOR ||
3800 !X86::isZeroNode(V1.getOperand(Idx)))
3807 /// getZeroVector - Returns a vector of specified type with all zero elements.
3809 static SDValue getZeroVector(EVT VT, bool HasSSE2, SelectionDAG &DAG,
3811 assert(VT.isVector() && "Expected a vector type");
3813 // Always build SSE zero vectors as <4 x i32> bitcasted
3814 // to their dest type. This ensures they get CSE'd.
3816 if (VT.getSizeInBits() == 128) { // SSE
3817 if (HasSSE2) { // SSE2
3818 SDValue Cst = DAG.getTargetConstant(0, MVT::i32);
3819 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, Cst, Cst, Cst, Cst);
3821 SDValue Cst = DAG.getTargetConstantFP(+0.0, MVT::f32);
3822 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4f32, Cst, Cst, Cst, Cst);
3824 } else if (VT.getSizeInBits() == 256) { // AVX
3825 // 256-bit logic and arithmetic instructions in AVX are
3826 // all floating-point, no support for integer ops. Default
3827 // to emitting fp zeroed vectors then.
3828 SDValue Cst = DAG.getTargetConstantFP(+0.0, MVT::f32);
3829 SDValue Ops[] = { Cst, Cst, Cst, Cst, Cst, Cst, Cst, Cst };
3830 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v8f32, Ops, 8);
3832 return DAG.getNode(ISD::BITCAST, dl, VT, Vec);
3835 /// getOnesVector - Returns a vector of specified type with all bits set.
3837 static SDValue getOnesVector(EVT VT, SelectionDAG &DAG, DebugLoc dl) {
3838 assert(VT.isVector() && "Expected a vector type");
3840 // Always build ones vectors as <4 x i32> or <2 x i32> bitcasted to their dest
3841 // type. This ensures they get CSE'd.
3842 SDValue Cst = DAG.getTargetConstant(~0U, MVT::i32);
3844 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, Cst, Cst, Cst, Cst);
3845 return DAG.getNode(ISD::BITCAST, dl, VT, Vec);
3849 /// NormalizeMask - V2 is a splat, modify the mask (if needed) so all elements
3850 /// that point to V2 points to its first element.
3851 static SDValue NormalizeMask(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG) {
3852 EVT VT = SVOp->getValueType(0);
3853 unsigned NumElems = VT.getVectorNumElements();
3855 bool Changed = false;
3856 SmallVector<int, 8> MaskVec;
3857 SVOp->getMask(MaskVec);
3859 for (unsigned i = 0; i != NumElems; ++i) {
3860 if (MaskVec[i] > (int)NumElems) {
3861 MaskVec[i] = NumElems;
3866 return DAG.getVectorShuffle(VT, SVOp->getDebugLoc(), SVOp->getOperand(0),
3867 SVOp->getOperand(1), &MaskVec[0]);
3868 return SDValue(SVOp, 0);
3871 /// getMOVLMask - Returns a vector_shuffle mask for an movs{s|d}, movd
3872 /// operation of specified width.
3873 static SDValue getMOVL(SelectionDAG &DAG, DebugLoc dl, EVT VT, SDValue V1,
3875 unsigned NumElems = VT.getVectorNumElements();
3876 SmallVector<int, 8> Mask;
3877 Mask.push_back(NumElems);
3878 for (unsigned i = 1; i != NumElems; ++i)
3880 return DAG.getVectorShuffle(VT, dl, V1, V2, &Mask[0]);
3883 /// getUnpackl - Returns a vector_shuffle node for an unpackl operation.
3884 static SDValue getUnpackl(SelectionDAG &DAG, DebugLoc dl, EVT VT, SDValue V1,
3886 unsigned NumElems = VT.getVectorNumElements();
3887 SmallVector<int, 8> Mask;
3888 for (unsigned i = 0, e = NumElems/2; i != e; ++i) {
3890 Mask.push_back(i + NumElems);
3892 return DAG.getVectorShuffle(VT, dl, V1, V2, &Mask[0]);
3895 /// getUnpackhMask - Returns a vector_shuffle node for an unpackh operation.
3896 static SDValue getUnpackh(SelectionDAG &DAG, DebugLoc dl, EVT VT, SDValue V1,
3898 unsigned NumElems = VT.getVectorNumElements();
3899 unsigned Half = NumElems/2;
3900 SmallVector<int, 8> Mask;
3901 for (unsigned i = 0; i != Half; ++i) {
3902 Mask.push_back(i + Half);
3903 Mask.push_back(i + NumElems + Half);
3905 return DAG.getVectorShuffle(VT, dl, V1, V2, &Mask[0]);
3908 /// PromoteSplat - Promote a splat of v4i32, v8i16 or v16i8 to v4f32.
3909 static SDValue PromoteSplat(ShuffleVectorSDNode *SV, SelectionDAG &DAG) {
3910 EVT PVT = MVT::v4f32;
3911 EVT VT = SV->getValueType(0);
3912 DebugLoc dl = SV->getDebugLoc();
3913 SDValue V1 = SV->getOperand(0);
3914 int NumElems = VT.getVectorNumElements();
3915 int EltNo = SV->getSplatIndex();
3917 // unpack elements to the correct location
3918 while (NumElems > 4) {
3919 if (EltNo < NumElems/2) {
3920 V1 = getUnpackl(DAG, dl, VT, V1, V1);
3922 V1 = getUnpackh(DAG, dl, VT, V1, V1);
3923 EltNo -= NumElems/2;
3928 // Perform the splat.
3929 int SplatMask[4] = { EltNo, EltNo, EltNo, EltNo };
3930 V1 = DAG.getNode(ISD::BITCAST, dl, PVT, V1);
3931 V1 = DAG.getVectorShuffle(PVT, dl, V1, DAG.getUNDEF(PVT), &SplatMask[0]);
3932 return DAG.getNode(ISD::BITCAST, dl, VT, V1);
3935 /// getShuffleVectorZeroOrUndef - Return a vector_shuffle of the specified
3936 /// vector of zero or undef vector. This produces a shuffle where the low
3937 /// element of V2 is swizzled into the zero/undef vector, landing at element
3938 /// Idx. This produces a shuffle mask like 4,1,2,3 (idx=0) or 0,1,2,4 (idx=3).
3939 static SDValue getShuffleVectorZeroOrUndef(SDValue V2, unsigned Idx,
3940 bool isZero, bool HasSSE2,
3941 SelectionDAG &DAG) {
3942 EVT VT = V2.getValueType();
3944 ? getZeroVector(VT, HasSSE2, DAG, V2.getDebugLoc()) : DAG.getUNDEF(VT);
3945 unsigned NumElems = VT.getVectorNumElements();
3946 SmallVector<int, 16> MaskVec;
3947 for (unsigned i = 0; i != NumElems; ++i)
3948 // If this is the insertion idx, put the low elt of V2 here.
3949 MaskVec.push_back(i == Idx ? NumElems : i);
3950 return DAG.getVectorShuffle(VT, V2.getDebugLoc(), V1, V2, &MaskVec[0]);
3953 /// getShuffleScalarElt - Returns the scalar element that will make up the ith
3954 /// element of the result of the vector shuffle.
3955 static SDValue getShuffleScalarElt(SDNode *N, int Index, SelectionDAG &DAG,
3958 return SDValue(); // Limit search depth.
3960 SDValue V = SDValue(N, 0);
3961 EVT VT = V.getValueType();
3962 unsigned Opcode = V.getOpcode();
3964 // Recurse into ISD::VECTOR_SHUFFLE node to find scalars.
3965 if (const ShuffleVectorSDNode *SV = dyn_cast<ShuffleVectorSDNode>(N)) {
3966 Index = SV->getMaskElt(Index);
3969 return DAG.getUNDEF(VT.getVectorElementType());
3971 int NumElems = VT.getVectorNumElements();
3972 SDValue NewV = (Index < NumElems) ? SV->getOperand(0) : SV->getOperand(1);
3973 return getShuffleScalarElt(NewV.getNode(), Index % NumElems, DAG, Depth+1);
3976 // Recurse into target specific vector shuffles to find scalars.
3977 if (isTargetShuffle(Opcode)) {
3978 int NumElems = VT.getVectorNumElements();
3979 SmallVector<unsigned, 16> ShuffleMask;
3983 case X86ISD::SHUFPS:
3984 case X86ISD::SHUFPD:
3985 ImmN = N->getOperand(N->getNumOperands()-1);
3986 DecodeSHUFPSMask(NumElems,
3987 cast<ConstantSDNode>(ImmN)->getZExtValue(),
3990 case X86ISD::PUNPCKHBW:
3991 case X86ISD::PUNPCKHWD:
3992 case X86ISD::PUNPCKHDQ:
3993 case X86ISD::PUNPCKHQDQ:
3994 DecodePUNPCKHMask(NumElems, ShuffleMask);
3996 case X86ISD::UNPCKHPS:
3997 case X86ISD::UNPCKHPD:
3998 DecodeUNPCKHPMask(NumElems, ShuffleMask);
4000 case X86ISD::PUNPCKLBW:
4001 case X86ISD::PUNPCKLWD:
4002 case X86ISD::PUNPCKLDQ:
4003 case X86ISD::PUNPCKLQDQ:
4004 DecodePUNPCKLMask(VT, ShuffleMask);
4006 case X86ISD::UNPCKLPS:
4007 case X86ISD::UNPCKLPD:
4008 case X86ISD::VUNPCKLPS:
4009 case X86ISD::VUNPCKLPD:
4010 case X86ISD::VUNPCKLPSY:
4011 case X86ISD::VUNPCKLPDY:
4012 DecodeUNPCKLPMask(VT, ShuffleMask);
4014 case X86ISD::MOVHLPS:
4015 DecodeMOVHLPSMask(NumElems, ShuffleMask);
4017 case X86ISD::MOVLHPS:
4018 DecodeMOVLHPSMask(NumElems, ShuffleMask);
4020 case X86ISD::PSHUFD:
4021 ImmN = N->getOperand(N->getNumOperands()-1);
4022 DecodePSHUFMask(NumElems,
4023 cast<ConstantSDNode>(ImmN)->getZExtValue(),
4026 case X86ISD::PSHUFHW:
4027 ImmN = N->getOperand(N->getNumOperands()-1);
4028 DecodePSHUFHWMask(cast<ConstantSDNode>(ImmN)->getZExtValue(),
4031 case X86ISD::PSHUFLW:
4032 ImmN = N->getOperand(N->getNumOperands()-1);
4033 DecodePSHUFLWMask(cast<ConstantSDNode>(ImmN)->getZExtValue(),
4037 case X86ISD::MOVSD: {
4038 // The index 0 always comes from the first element of the second source,
4039 // this is why MOVSS and MOVSD are used in the first place. The other
4040 // elements come from the other positions of the first source vector.
4041 unsigned OpNum = (Index == 0) ? 1 : 0;
4042 return getShuffleScalarElt(V.getOperand(OpNum).getNode(), Index, DAG,
4046 assert("not implemented for target shuffle node");
4050 Index = ShuffleMask[Index];
4052 return DAG.getUNDEF(VT.getVectorElementType());
4054 SDValue NewV = (Index < NumElems) ? N->getOperand(0) : N->getOperand(1);
4055 return getShuffleScalarElt(NewV.getNode(), Index % NumElems, DAG,
4059 // Actual nodes that may contain scalar elements
4060 if (Opcode == ISD::BITCAST) {
4061 V = V.getOperand(0);
4062 EVT SrcVT = V.getValueType();
4063 unsigned NumElems = VT.getVectorNumElements();
4065 if (!SrcVT.isVector() || SrcVT.getVectorNumElements() != NumElems)
4069 if (V.getOpcode() == ISD::SCALAR_TO_VECTOR)
4070 return (Index == 0) ? V.getOperand(0)
4071 : DAG.getUNDEF(VT.getVectorElementType());
4073 if (V.getOpcode() == ISD::BUILD_VECTOR)
4074 return V.getOperand(Index);
4079 /// getNumOfConsecutiveZeros - Return the number of elements of a vector
4080 /// shuffle operation which come from a consecutively from a zero. The
4081 /// search can start in two different directions, from left or right.
4083 unsigned getNumOfConsecutiveZeros(SDNode *N, int NumElems,
4084 bool ZerosFromLeft, SelectionDAG &DAG) {
4087 while (i < NumElems) {
4088 unsigned Index = ZerosFromLeft ? i : NumElems-i-1;
4089 SDValue Elt = getShuffleScalarElt(N, Index, DAG, 0);
4090 if (!(Elt.getNode() &&
4091 (Elt.getOpcode() == ISD::UNDEF || X86::isZeroNode(Elt))))
4099 /// isShuffleMaskConsecutive - Check if the shuffle mask indicies from MaskI to
4100 /// MaskE correspond consecutively to elements from one of the vector operands,
4101 /// starting from its index OpIdx. Also tell OpNum which source vector operand.
4103 bool isShuffleMaskConsecutive(ShuffleVectorSDNode *SVOp, int MaskI, int MaskE,
4104 int OpIdx, int NumElems, unsigned &OpNum) {
4105 bool SeenV1 = false;
4106 bool SeenV2 = false;
4108 for (int i = MaskI; i <= MaskE; ++i, ++OpIdx) {
4109 int Idx = SVOp->getMaskElt(i);
4110 // Ignore undef indicies
4119 // Only accept consecutive elements from the same vector
4120 if ((Idx % NumElems != OpIdx) || (SeenV1 && SeenV2))
4124 OpNum = SeenV1 ? 0 : 1;
4128 /// isVectorShiftRight - Returns true if the shuffle can be implemented as a
4129 /// logical left shift of a vector.
4130 static bool isVectorShiftRight(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG,
4131 bool &isLeft, SDValue &ShVal, unsigned &ShAmt) {
4132 unsigned NumElems = SVOp->getValueType(0).getVectorNumElements();
4133 unsigned NumZeros = getNumOfConsecutiveZeros(SVOp, NumElems,
4134 false /* check zeros from right */, DAG);
4140 // Considering the elements in the mask that are not consecutive zeros,
4141 // check if they consecutively come from only one of the source vectors.
4143 // V1 = {X, A, B, C} 0
4145 // vector_shuffle V1, V2 <1, 2, 3, X>
4147 if (!isShuffleMaskConsecutive(SVOp,
4148 0, // Mask Start Index
4149 NumElems-NumZeros-1, // Mask End Index
4150 NumZeros, // Where to start looking in the src vector
4151 NumElems, // Number of elements in vector
4152 OpSrc)) // Which source operand ?
4157 ShVal = SVOp->getOperand(OpSrc);
4161 /// isVectorShiftLeft - Returns true if the shuffle can be implemented as a
4162 /// logical left shift of a vector.
4163 static bool isVectorShiftLeft(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG,
4164 bool &isLeft, SDValue &ShVal, unsigned &ShAmt) {
4165 unsigned NumElems = SVOp->getValueType(0).getVectorNumElements();
4166 unsigned NumZeros = getNumOfConsecutiveZeros(SVOp, NumElems,
4167 true /* check zeros from left */, DAG);
4173 // Considering the elements in the mask that are not consecutive zeros,
4174 // check if they consecutively come from only one of the source vectors.
4176 // 0 { A, B, X, X } = V2
4178 // vector_shuffle V1, V2 <X, X, 4, 5>
4180 if (!isShuffleMaskConsecutive(SVOp,
4181 NumZeros, // Mask Start Index
4182 NumElems-1, // Mask End Index
4183 0, // Where to start looking in the src vector
4184 NumElems, // Number of elements in vector
4185 OpSrc)) // Which source operand ?
4190 ShVal = SVOp->getOperand(OpSrc);
4194 /// isVectorShift - Returns true if the shuffle can be implemented as a
4195 /// logical left or right shift of a vector.
4196 static bool isVectorShift(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG,
4197 bool &isLeft, SDValue &ShVal, unsigned &ShAmt) {
4198 if (isVectorShiftLeft(SVOp, DAG, isLeft, ShVal, ShAmt) ||
4199 isVectorShiftRight(SVOp, DAG, isLeft, ShVal, ShAmt))
4205 /// LowerBuildVectorv16i8 - Custom lower build_vector of v16i8.
4207 static SDValue LowerBuildVectorv16i8(SDValue Op, unsigned NonZeros,
4208 unsigned NumNonZero, unsigned NumZero,
4210 const TargetLowering &TLI) {
4214 DebugLoc dl = Op.getDebugLoc();
4217 for (unsigned i = 0; i < 16; ++i) {
4218 bool ThisIsNonZero = (NonZeros & (1 << i)) != 0;
4219 if (ThisIsNonZero && First) {
4221 V = getZeroVector(MVT::v8i16, true, DAG, dl);
4223 V = DAG.getUNDEF(MVT::v8i16);
4228 SDValue ThisElt(0, 0), LastElt(0, 0);
4229 bool LastIsNonZero = (NonZeros & (1 << (i-1))) != 0;
4230 if (LastIsNonZero) {
4231 LastElt = DAG.getNode(ISD::ZERO_EXTEND, dl,
4232 MVT::i16, Op.getOperand(i-1));
4234 if (ThisIsNonZero) {
4235 ThisElt = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i16, Op.getOperand(i));
4236 ThisElt = DAG.getNode(ISD::SHL, dl, MVT::i16,
4237 ThisElt, DAG.getConstant(8, MVT::i8));
4239 ThisElt = DAG.getNode(ISD::OR, dl, MVT::i16, ThisElt, LastElt);
4243 if (ThisElt.getNode())
4244 V = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, V, ThisElt,
4245 DAG.getIntPtrConstant(i/2));
4249 return DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, V);
4252 /// LowerBuildVectorv8i16 - Custom lower build_vector of v8i16.
4254 static SDValue LowerBuildVectorv8i16(SDValue Op, unsigned NonZeros,
4255 unsigned NumNonZero, unsigned NumZero,
4257 const TargetLowering &TLI) {
4261 DebugLoc dl = Op.getDebugLoc();
4264 for (unsigned i = 0; i < 8; ++i) {
4265 bool isNonZero = (NonZeros & (1 << i)) != 0;
4269 V = getZeroVector(MVT::v8i16, true, DAG, dl);
4271 V = DAG.getUNDEF(MVT::v8i16);
4274 V = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl,
4275 MVT::v8i16, V, Op.getOperand(i),
4276 DAG.getIntPtrConstant(i));
4283 /// getVShift - Return a vector logical shift node.
4285 static SDValue getVShift(bool isLeft, EVT VT, SDValue SrcOp,
4286 unsigned NumBits, SelectionDAG &DAG,
4287 const TargetLowering &TLI, DebugLoc dl) {
4288 EVT ShVT = MVT::v2i64;
4289 unsigned Opc = isLeft ? X86ISD::VSHL : X86ISD::VSRL;
4290 SrcOp = DAG.getNode(ISD::BITCAST, dl, ShVT, SrcOp);
4291 return DAG.getNode(ISD::BITCAST, dl, VT,
4292 DAG.getNode(Opc, dl, ShVT, SrcOp,
4293 DAG.getConstant(NumBits,
4294 TLI.getShiftAmountTy(SrcOp.getValueType()))));
4298 X86TargetLowering::LowerAsSplatVectorLoad(SDValue SrcOp, EVT VT, DebugLoc dl,
4299 SelectionDAG &DAG) const {
4301 // Check if the scalar load can be widened into a vector load. And if
4302 // the address is "base + cst" see if the cst can be "absorbed" into
4303 // the shuffle mask.
4304 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(SrcOp)) {
4305 SDValue Ptr = LD->getBasePtr();
4306 if (!ISD::isNormalLoad(LD) || LD->isVolatile())
4308 EVT PVT = LD->getValueType(0);
4309 if (PVT != MVT::i32 && PVT != MVT::f32)
4314 if (FrameIndexSDNode *FINode = dyn_cast<FrameIndexSDNode>(Ptr)) {
4315 FI = FINode->getIndex();
4317 } else if (DAG.isBaseWithConstantOffset(Ptr) &&
4318 isa<FrameIndexSDNode>(Ptr.getOperand(0))) {
4319 FI = cast<FrameIndexSDNode>(Ptr.getOperand(0))->getIndex();
4320 Offset = Ptr.getConstantOperandVal(1);
4321 Ptr = Ptr.getOperand(0);
4326 SDValue Chain = LD->getChain();
4327 // Make sure the stack object alignment is at least 16.
4328 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
4329 if (DAG.InferPtrAlignment(Ptr) < 16) {
4330 if (MFI->isFixedObjectIndex(FI)) {
4331 // Can't change the alignment. FIXME: It's possible to compute
4332 // the exact stack offset and reference FI + adjust offset instead.
4333 // If someone *really* cares about this. That's the way to implement it.
4336 MFI->setObjectAlignment(FI, 16);
4340 // (Offset % 16) must be multiple of 4. Then address is then
4341 // Ptr + (Offset & ~15).
4344 if ((Offset % 16) & 3)
4346 int64_t StartOffset = Offset & ~15;
4348 Ptr = DAG.getNode(ISD::ADD, Ptr.getDebugLoc(), Ptr.getValueType(),
4349 Ptr,DAG.getConstant(StartOffset, Ptr.getValueType()));
4351 int EltNo = (Offset - StartOffset) >> 2;
4352 int Mask[4] = { EltNo, EltNo, EltNo, EltNo };
4353 EVT VT = (PVT == MVT::i32) ? MVT::v4i32 : MVT::v4f32;
4354 SDValue V1 = DAG.getLoad(VT, dl, Chain, Ptr,
4355 LD->getPointerInfo().getWithOffset(StartOffset),
4357 // Canonicalize it to a v4i32 shuffle.
4358 V1 = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, V1);
4359 return DAG.getNode(ISD::BITCAST, dl, VT,
4360 DAG.getVectorShuffle(MVT::v4i32, dl, V1,
4361 DAG.getUNDEF(MVT::v4i32),&Mask[0]));
4367 /// EltsFromConsecutiveLoads - Given the initializing elements 'Elts' of a
4368 /// vector of type 'VT', see if the elements can be replaced by a single large
4369 /// load which has the same value as a build_vector whose operands are 'elts'.
4371 /// Example: <load i32 *a, load i32 *a+4, undef, undef> -> zextload a
4373 /// FIXME: we'd also like to handle the case where the last elements are zero
4374 /// rather than undef via VZEXT_LOAD, but we do not detect that case today.
4375 /// There's even a handy isZeroNode for that purpose.
4376 static SDValue EltsFromConsecutiveLoads(EVT VT, SmallVectorImpl<SDValue> &Elts,
4377 DebugLoc &DL, SelectionDAG &DAG) {
4378 EVT EltVT = VT.getVectorElementType();
4379 unsigned NumElems = Elts.size();
4381 LoadSDNode *LDBase = NULL;
4382 unsigned LastLoadedElt = -1U;
4384 // For each element in the initializer, see if we've found a load or an undef.
4385 // If we don't find an initial load element, or later load elements are
4386 // non-consecutive, bail out.
4387 for (unsigned i = 0; i < NumElems; ++i) {
4388 SDValue Elt = Elts[i];
4390 if (!Elt.getNode() ||
4391 (Elt.getOpcode() != ISD::UNDEF && !ISD::isNON_EXTLoad(Elt.getNode())))
4394 if (Elt.getNode()->getOpcode() == ISD::UNDEF)
4396 LDBase = cast<LoadSDNode>(Elt.getNode());
4400 if (Elt.getOpcode() == ISD::UNDEF)
4403 LoadSDNode *LD = cast<LoadSDNode>(Elt);
4404 if (!DAG.isConsecutiveLoad(LD, LDBase, EltVT.getSizeInBits()/8, i))
4409 // If we have found an entire vector of loads and undefs, then return a large
4410 // load of the entire vector width starting at the base pointer. If we found
4411 // consecutive loads for the low half, generate a vzext_load node.
4412 if (LastLoadedElt == NumElems - 1) {
4413 if (DAG.InferPtrAlignment(LDBase->getBasePtr()) >= 16)
4414 return DAG.getLoad(VT, DL, LDBase->getChain(), LDBase->getBasePtr(),
4415 LDBase->getPointerInfo(),
4416 LDBase->isVolatile(), LDBase->isNonTemporal(), 0);
4417 return DAG.getLoad(VT, DL, LDBase->getChain(), LDBase->getBasePtr(),
4418 LDBase->getPointerInfo(),
4419 LDBase->isVolatile(), LDBase->isNonTemporal(),
4420 LDBase->getAlignment());
4421 } else if (NumElems == 4 && LastLoadedElt == 1) {
4422 SDVTList Tys = DAG.getVTList(MVT::v2i64, MVT::Other);
4423 SDValue Ops[] = { LDBase->getChain(), LDBase->getBasePtr() };
4424 SDValue ResNode = DAG.getMemIntrinsicNode(X86ISD::VZEXT_LOAD, DL, Tys,
4426 LDBase->getMemOperand());
4427 return DAG.getNode(ISD::BITCAST, DL, VT, ResNode);
4433 X86TargetLowering::LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG) const {
4434 DebugLoc dl = Op.getDebugLoc();
4436 EVT VT = Op.getValueType();
4437 EVT ExtVT = VT.getVectorElementType();
4439 unsigned NumElems = Op.getNumOperands();
4441 // For AVX-length vectors, build the individual 128-bit pieces and
4442 // use shuffles to put them in place.
4443 if (VT.getSizeInBits() > 256 &&
4444 Subtarget->hasAVX() &&
4445 !ISD::isBuildVectorAllZeros(Op.getNode())) {
4446 SmallVector<SDValue, 8> V;
4448 for (unsigned i = 0; i < NumElems; ++i) {
4449 V[i] = Op.getOperand(i);
4452 EVT HVT = EVT::getVectorVT(*DAG.getContext(), ExtVT, NumElems/2);
4454 // Build the lower subvector.
4455 SDValue Lower = DAG.getNode(ISD::BUILD_VECTOR, dl, HVT, &V[0], NumElems/2);
4456 // Build the upper subvector.
4457 SDValue Upper = DAG.getNode(ISD::BUILD_VECTOR, dl, HVT, &V[NumElems / 2],
4460 return ConcatVectors(Lower, Upper, DAG);
4463 // All zero's are handled with pxor in SSE2 and above, xorps in SSE1.
4464 // All one's are handled with pcmpeqd. In AVX, zero's are handled with
4465 // vpxor in 128-bit and xor{pd,ps} in 256-bit, but no 256 version of pcmpeqd
4466 // is present, so AllOnes is ignored.
4467 if (ISD::isBuildVectorAllZeros(Op.getNode()) ||
4468 (Op.getValueType().getSizeInBits() != 256 &&
4469 ISD::isBuildVectorAllOnes(Op.getNode()))) {
4470 // Canonicalize this to <4 x i32> (SSE) to
4471 // 1) ensure the zero vectors are CSE'd, and 2) ensure that i64 scalars are
4472 // eliminated on x86-32 hosts.
4473 if (Op.getValueType() == MVT::v4i32)
4476 if (ISD::isBuildVectorAllOnes(Op.getNode()))
4477 return getOnesVector(Op.getValueType(), DAG, dl);
4478 return getZeroVector(Op.getValueType(), Subtarget->hasSSE2(), DAG, dl);
4481 unsigned EVTBits = ExtVT.getSizeInBits();
4483 unsigned NumZero = 0;
4484 unsigned NumNonZero = 0;
4485 unsigned NonZeros = 0;
4486 bool IsAllConstants = true;
4487 SmallSet<SDValue, 8> Values;
4488 for (unsigned i = 0; i < NumElems; ++i) {
4489 SDValue Elt = Op.getOperand(i);
4490 if (Elt.getOpcode() == ISD::UNDEF)
4493 if (Elt.getOpcode() != ISD::Constant &&
4494 Elt.getOpcode() != ISD::ConstantFP)
4495 IsAllConstants = false;
4496 if (X86::isZeroNode(Elt))
4499 NonZeros |= (1 << i);
4504 // All undef vector. Return an UNDEF. All zero vectors were handled above.
4505 if (NumNonZero == 0)
4506 return DAG.getUNDEF(VT);
4508 // Special case for single non-zero, non-undef, element.
4509 if (NumNonZero == 1) {
4510 unsigned Idx = CountTrailingZeros_32(NonZeros);
4511 SDValue Item = Op.getOperand(Idx);
4513 // If this is an insertion of an i64 value on x86-32, and if the top bits of
4514 // the value are obviously zero, truncate the value to i32 and do the
4515 // insertion that way. Only do this if the value is non-constant or if the
4516 // value is a constant being inserted into element 0. It is cheaper to do
4517 // a constant pool load than it is to do a movd + shuffle.
4518 if (ExtVT == MVT::i64 && !Subtarget->is64Bit() &&
4519 (!IsAllConstants || Idx == 0)) {
4520 if (DAG.MaskedValueIsZero(Item, APInt::getBitsSet(64, 32, 64))) {
4522 assert(VT == MVT::v2i64 && "Expected an SSE value type!");
4523 EVT VecVT = MVT::v4i32;
4524 unsigned VecElts = 4;
4526 // Truncate the value (which may itself be a constant) to i32, and
4527 // convert it to a vector with movd (S2V+shuffle to zero extend).
4528 Item = DAG.getNode(ISD::TRUNCATE, dl, MVT::i32, Item);
4529 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VecVT, Item);
4530 Item = getShuffleVectorZeroOrUndef(Item, 0, true,
4531 Subtarget->hasSSE2(), DAG);
4533 // Now we have our 32-bit value zero extended in the low element of
4534 // a vector. If Idx != 0, swizzle it into place.
4536 SmallVector<int, 4> Mask;
4537 Mask.push_back(Idx);
4538 for (unsigned i = 1; i != VecElts; ++i)
4540 Item = DAG.getVectorShuffle(VecVT, dl, Item,
4541 DAG.getUNDEF(Item.getValueType()),
4544 return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(), Item);
4548 // If we have a constant or non-constant insertion into the low element of
4549 // a vector, we can do this with SCALAR_TO_VECTOR + shuffle of zero into
4550 // the rest of the elements. This will be matched as movd/movq/movss/movsd
4551 // depending on what the source datatype is.
4554 return DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Item);
4555 } else if (ExtVT == MVT::i32 || ExtVT == MVT::f32 || ExtVT == MVT::f64 ||
4556 (ExtVT == MVT::i64 && Subtarget->is64Bit())) {
4557 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Item);
4558 // Turn it into a MOVL (i.e. movss, movsd, or movd) to a zero vector.
4559 return getShuffleVectorZeroOrUndef(Item, 0, true, Subtarget->hasSSE2(),
4561 } else if (ExtVT == MVT::i16 || ExtVT == MVT::i8) {
4562 Item = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, Item);
4563 assert(VT.getSizeInBits() == 128 && "Expected an SSE value type!");
4564 EVT MiddleVT = MVT::v4i32;
4565 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MiddleVT, Item);
4566 Item = getShuffleVectorZeroOrUndef(Item, 0, true,
4567 Subtarget->hasSSE2(), DAG);
4568 return DAG.getNode(ISD::BITCAST, dl, VT, Item);
4572 // Is it a vector logical left shift?
4573 if (NumElems == 2 && Idx == 1 &&
4574 X86::isZeroNode(Op.getOperand(0)) &&
4575 !X86::isZeroNode(Op.getOperand(1))) {
4576 unsigned NumBits = VT.getSizeInBits();
4577 return getVShift(true, VT,
4578 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
4579 VT, Op.getOperand(1)),
4580 NumBits/2, DAG, *this, dl);
4583 if (IsAllConstants) // Otherwise, it's better to do a constpool load.
4586 // Otherwise, if this is a vector with i32 or f32 elements, and the element
4587 // is a non-constant being inserted into an element other than the low one,
4588 // we can't use a constant pool load. Instead, use SCALAR_TO_VECTOR (aka
4589 // movd/movss) to move this into the low element, then shuffle it into
4591 if (EVTBits == 32) {
4592 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Item);
4594 // Turn it into a shuffle of zero and zero-extended scalar to vector.
4595 Item = getShuffleVectorZeroOrUndef(Item, 0, NumZero > 0,
4596 Subtarget->hasSSE2(), DAG);
4597 SmallVector<int, 8> MaskVec;
4598 for (unsigned i = 0; i < NumElems; i++)
4599 MaskVec.push_back(i == Idx ? 0 : 1);
4600 return DAG.getVectorShuffle(VT, dl, Item, DAG.getUNDEF(VT), &MaskVec[0]);
4604 // Splat is obviously ok. Let legalizer expand it to a shuffle.
4605 if (Values.size() == 1) {
4606 if (EVTBits == 32) {
4607 // Instead of a shuffle like this:
4608 // shuffle (scalar_to_vector (load (ptr + 4))), undef, <0, 0, 0, 0>
4609 // Check if it's possible to issue this instead.
4610 // shuffle (vload ptr)), undef, <1, 1, 1, 1>
4611 unsigned Idx = CountTrailingZeros_32(NonZeros);
4612 SDValue Item = Op.getOperand(Idx);
4613 if (Op.getNode()->isOnlyUserOf(Item.getNode()))
4614 return LowerAsSplatVectorLoad(Item, VT, dl, DAG);
4619 // A vector full of immediates; various special cases are already
4620 // handled, so this is best done with a single constant-pool load.
4624 // Let legalizer expand 2-wide build_vectors.
4625 if (EVTBits == 64) {
4626 if (NumNonZero == 1) {
4627 // One half is zero or undef.
4628 unsigned Idx = CountTrailingZeros_32(NonZeros);
4629 SDValue V2 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT,
4630 Op.getOperand(Idx));
4631 return getShuffleVectorZeroOrUndef(V2, Idx, true,
4632 Subtarget->hasSSE2(), DAG);
4637 // If element VT is < 32 bits, convert it to inserts into a zero vector.
4638 if (EVTBits == 8 && NumElems == 16) {
4639 SDValue V = LowerBuildVectorv16i8(Op, NonZeros,NumNonZero,NumZero, DAG,
4641 if (V.getNode()) return V;
4644 if (EVTBits == 16 && NumElems == 8) {
4645 SDValue V = LowerBuildVectorv8i16(Op, NonZeros,NumNonZero,NumZero, DAG,
4647 if (V.getNode()) return V;
4650 // If element VT is == 32 bits, turn it into a number of shuffles.
4651 SmallVector<SDValue, 8> V;
4653 if (NumElems == 4 && NumZero > 0) {
4654 for (unsigned i = 0; i < 4; ++i) {
4655 bool isZero = !(NonZeros & (1 << i));
4657 V[i] = getZeroVector(VT, Subtarget->hasSSE2(), DAG, dl);
4659 V[i] = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Op.getOperand(i));
4662 for (unsigned i = 0; i < 2; ++i) {
4663 switch ((NonZeros & (0x3 << i*2)) >> (i*2)) {
4666 V[i] = V[i*2]; // Must be a zero vector.
4669 V[i] = getMOVL(DAG, dl, VT, V[i*2+1], V[i*2]);
4672 V[i] = getMOVL(DAG, dl, VT, V[i*2], V[i*2+1]);
4675 V[i] = getUnpackl(DAG, dl, VT, V[i*2], V[i*2+1]);
4680 SmallVector<int, 8> MaskVec;
4681 bool Reverse = (NonZeros & 0x3) == 2;
4682 for (unsigned i = 0; i < 2; ++i)
4683 MaskVec.push_back(Reverse ? 1-i : i);
4684 Reverse = ((NonZeros & (0x3 << 2)) >> 2) == 2;
4685 for (unsigned i = 0; i < 2; ++i)
4686 MaskVec.push_back(Reverse ? 1-i+NumElems : i+NumElems);
4687 return DAG.getVectorShuffle(VT, dl, V[0], V[1], &MaskVec[0]);
4690 if (Values.size() > 1 && VT.getSizeInBits() == 128) {
4691 // Check for a build vector of consecutive loads.
4692 for (unsigned i = 0; i < NumElems; ++i)
4693 V[i] = Op.getOperand(i);
4695 // Check for elements which are consecutive loads.
4696 SDValue LD = EltsFromConsecutiveLoads(VT, V, dl, DAG);
4700 // For SSE 4.1, use insertps to put the high elements into the low element.
4701 if (getSubtarget()->hasSSE41()) {
4703 if (Op.getOperand(0).getOpcode() != ISD::UNDEF)
4704 Result = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Op.getOperand(0));
4706 Result = DAG.getUNDEF(VT);
4708 for (unsigned i = 1; i < NumElems; ++i) {
4709 if (Op.getOperand(i).getOpcode() == ISD::UNDEF) continue;
4710 Result = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, Result,
4711 Op.getOperand(i), DAG.getIntPtrConstant(i));
4716 // Otherwise, expand into a number of unpckl*, start by extending each of
4717 // our (non-undef) elements to the full vector width with the element in the
4718 // bottom slot of the vector (which generates no code for SSE).
4719 for (unsigned i = 0; i < NumElems; ++i) {
4720 if (Op.getOperand(i).getOpcode() != ISD::UNDEF)
4721 V[i] = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Op.getOperand(i));
4723 V[i] = DAG.getUNDEF(VT);
4726 // Next, we iteratively mix elements, e.g. for v4f32:
4727 // Step 1: unpcklps 0, 2 ==> X: <?, ?, 2, 0>
4728 // : unpcklps 1, 3 ==> Y: <?, ?, 3, 1>
4729 // Step 2: unpcklps X, Y ==> <3, 2, 1, 0>
4730 unsigned EltStride = NumElems >> 1;
4731 while (EltStride != 0) {
4732 for (unsigned i = 0; i < EltStride; ++i) {
4733 // If V[i+EltStride] is undef and this is the first round of mixing,
4734 // then it is safe to just drop this shuffle: V[i] is already in the
4735 // right place, the one element (since it's the first round) being
4736 // inserted as undef can be dropped. This isn't safe for successive
4737 // rounds because they will permute elements within both vectors.
4738 if (V[i+EltStride].getOpcode() == ISD::UNDEF &&
4739 EltStride == NumElems/2)
4742 V[i] = getUnpackl(DAG, dl, VT, V[i], V[i + EltStride]);
4752 X86TargetLowering::LowerCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) const {
4753 // We support concatenate two MMX registers and place them in a MMX
4754 // register. This is better than doing a stack convert.
4755 DebugLoc dl = Op.getDebugLoc();
4756 EVT ResVT = Op.getValueType();
4757 assert(Op.getNumOperands() == 2);
4758 assert(ResVT == MVT::v2i64 || ResVT == MVT::v4i32 ||
4759 ResVT == MVT::v8i16 || ResVT == MVT::v16i8);
4761 SDValue InVec = DAG.getNode(ISD::BITCAST,dl, MVT::v1i64, Op.getOperand(0));
4762 SDValue VecOp = DAG.getNode(X86ISD::MOVQ2DQ, dl, MVT::v2i64, InVec);
4763 InVec = Op.getOperand(1);
4764 if (InVec.getOpcode() == ISD::SCALAR_TO_VECTOR) {
4765 unsigned NumElts = ResVT.getVectorNumElements();
4766 VecOp = DAG.getNode(ISD::BITCAST, dl, ResVT, VecOp);
4767 VecOp = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, ResVT, VecOp,
4768 InVec.getOperand(0), DAG.getIntPtrConstant(NumElts/2+1));
4770 InVec = DAG.getNode(ISD::BITCAST, dl, MVT::v1i64, InVec);
4771 SDValue VecOp2 = DAG.getNode(X86ISD::MOVQ2DQ, dl, MVT::v2i64, InVec);
4772 Mask[0] = 0; Mask[1] = 2;
4773 VecOp = DAG.getVectorShuffle(MVT::v2i64, dl, VecOp, VecOp2, Mask);
4775 return DAG.getNode(ISD::BITCAST, dl, ResVT, VecOp);
4778 // v8i16 shuffles - Prefer shuffles in the following order:
4779 // 1. [all] pshuflw, pshufhw, optional move
4780 // 2. [ssse3] 1 x pshufb
4781 // 3. [ssse3] 2 x pshufb + 1 x por
4782 // 4. [all] mov + pshuflw + pshufhw + N x (pextrw + pinsrw)
4784 X86TargetLowering::LowerVECTOR_SHUFFLEv8i16(SDValue Op,
4785 SelectionDAG &DAG) const {
4786 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
4787 SDValue V1 = SVOp->getOperand(0);
4788 SDValue V2 = SVOp->getOperand(1);
4789 DebugLoc dl = SVOp->getDebugLoc();
4790 SmallVector<int, 8> MaskVals;
4792 // Determine if more than 1 of the words in each of the low and high quadwords
4793 // of the result come from the same quadword of one of the two inputs. Undef
4794 // mask values count as coming from any quadword, for better codegen.
4795 SmallVector<unsigned, 4> LoQuad(4);
4796 SmallVector<unsigned, 4> HiQuad(4);
4797 BitVector InputQuads(4);
4798 for (unsigned i = 0; i < 8; ++i) {
4799 SmallVectorImpl<unsigned> &Quad = i < 4 ? LoQuad : HiQuad;
4800 int EltIdx = SVOp->getMaskElt(i);
4801 MaskVals.push_back(EltIdx);
4810 InputQuads.set(EltIdx / 4);
4813 int BestLoQuad = -1;
4814 unsigned MaxQuad = 1;
4815 for (unsigned i = 0; i < 4; ++i) {
4816 if (LoQuad[i] > MaxQuad) {
4818 MaxQuad = LoQuad[i];
4822 int BestHiQuad = -1;
4824 for (unsigned i = 0; i < 4; ++i) {
4825 if (HiQuad[i] > MaxQuad) {
4827 MaxQuad = HiQuad[i];
4831 // For SSSE3, If all 8 words of the result come from only 1 quadword of each
4832 // of the two input vectors, shuffle them into one input vector so only a
4833 // single pshufb instruction is necessary. If There are more than 2 input
4834 // quads, disable the next transformation since it does not help SSSE3.
4835 bool V1Used = InputQuads[0] || InputQuads[1];
4836 bool V2Used = InputQuads[2] || InputQuads[3];
4837 if (Subtarget->hasSSSE3()) {
4838 if (InputQuads.count() == 2 && V1Used && V2Used) {
4839 BestLoQuad = InputQuads.find_first();
4840 BestHiQuad = InputQuads.find_next(BestLoQuad);
4842 if (InputQuads.count() > 2) {
4848 // If BestLoQuad or BestHiQuad are set, shuffle the quads together and update
4849 // the shuffle mask. If a quad is scored as -1, that means that it contains
4850 // words from all 4 input quadwords.
4852 if (BestLoQuad >= 0 || BestHiQuad >= 0) {
4853 SmallVector<int, 8> MaskV;
4854 MaskV.push_back(BestLoQuad < 0 ? 0 : BestLoQuad);
4855 MaskV.push_back(BestHiQuad < 0 ? 1 : BestHiQuad);
4856 NewV = DAG.getVectorShuffle(MVT::v2i64, dl,
4857 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64, V1),
4858 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64, V2), &MaskV[0]);
4859 NewV = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, NewV);
4861 // Rewrite the MaskVals and assign NewV to V1 if NewV now contains all the
4862 // source words for the shuffle, to aid later transformations.
4863 bool AllWordsInNewV = true;
4864 bool InOrder[2] = { true, true };
4865 for (unsigned i = 0; i != 8; ++i) {
4866 int idx = MaskVals[i];
4868 InOrder[i/4] = false;
4869 if (idx < 0 || (idx/4) == BestLoQuad || (idx/4) == BestHiQuad)
4871 AllWordsInNewV = false;
4875 bool pshuflw = AllWordsInNewV, pshufhw = AllWordsInNewV;
4876 if (AllWordsInNewV) {
4877 for (int i = 0; i != 8; ++i) {
4878 int idx = MaskVals[i];
4881 idx = MaskVals[i] = (idx / 4) == BestLoQuad ? (idx & 3) : (idx & 3) + 4;
4882 if ((idx != i) && idx < 4)
4884 if ((idx != i) && idx > 3)
4893 // If we've eliminated the use of V2, and the new mask is a pshuflw or
4894 // pshufhw, that's as cheap as it gets. Return the new shuffle.
4895 if ((pshufhw && InOrder[0]) || (pshuflw && InOrder[1])) {
4896 unsigned Opc = pshufhw ? X86ISD::PSHUFHW : X86ISD::PSHUFLW;
4897 unsigned TargetMask = 0;
4898 NewV = DAG.getVectorShuffle(MVT::v8i16, dl, NewV,
4899 DAG.getUNDEF(MVT::v8i16), &MaskVals[0]);
4900 TargetMask = pshufhw ? X86::getShufflePSHUFHWImmediate(NewV.getNode()):
4901 X86::getShufflePSHUFLWImmediate(NewV.getNode());
4902 V1 = NewV.getOperand(0);
4903 return getTargetShuffleNode(Opc, dl, MVT::v8i16, V1, TargetMask, DAG);
4907 // If we have SSSE3, and all words of the result are from 1 input vector,
4908 // case 2 is generated, otherwise case 3 is generated. If no SSSE3
4909 // is present, fall back to case 4.
4910 if (Subtarget->hasSSSE3()) {
4911 SmallVector<SDValue,16> pshufbMask;
4913 // If we have elements from both input vectors, set the high bit of the
4914 // shuffle mask element to zero out elements that come from V2 in the V1
4915 // mask, and elements that come from V1 in the V2 mask, so that the two
4916 // results can be OR'd together.
4917 bool TwoInputs = V1Used && V2Used;
4918 for (unsigned i = 0; i != 8; ++i) {
4919 int EltIdx = MaskVals[i] * 2;
4920 if (TwoInputs && (EltIdx >= 16)) {
4921 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
4922 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
4925 pshufbMask.push_back(DAG.getConstant(EltIdx, MVT::i8));
4926 pshufbMask.push_back(DAG.getConstant(EltIdx+1, MVT::i8));
4928 V1 = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, V1);
4929 V1 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V1,
4930 DAG.getNode(ISD::BUILD_VECTOR, dl,
4931 MVT::v16i8, &pshufbMask[0], 16));
4933 return DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, V1);
4935 // Calculate the shuffle mask for the second input, shuffle it, and
4936 // OR it with the first shuffled input.
4938 for (unsigned i = 0; i != 8; ++i) {
4939 int EltIdx = MaskVals[i] * 2;
4941 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
4942 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
4945 pshufbMask.push_back(DAG.getConstant(EltIdx - 16, MVT::i8));
4946 pshufbMask.push_back(DAG.getConstant(EltIdx - 15, MVT::i8));
4948 V2 = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, V2);
4949 V2 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V2,
4950 DAG.getNode(ISD::BUILD_VECTOR, dl,
4951 MVT::v16i8, &pshufbMask[0], 16));
4952 V1 = DAG.getNode(ISD::OR, dl, MVT::v16i8, V1, V2);
4953 return DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, V1);
4956 // If BestLoQuad >= 0, generate a pshuflw to put the low elements in order,
4957 // and update MaskVals with new element order.
4958 BitVector InOrder(8);
4959 if (BestLoQuad >= 0) {
4960 SmallVector<int, 8> MaskV;
4961 for (int i = 0; i != 4; ++i) {
4962 int idx = MaskVals[i];
4964 MaskV.push_back(-1);
4966 } else if ((idx / 4) == BestLoQuad) {
4967 MaskV.push_back(idx & 3);
4970 MaskV.push_back(-1);
4973 for (unsigned i = 4; i != 8; ++i)
4975 NewV = DAG.getVectorShuffle(MVT::v8i16, dl, NewV, DAG.getUNDEF(MVT::v8i16),
4978 if (NewV.getOpcode() == ISD::VECTOR_SHUFFLE && Subtarget->hasSSSE3())
4979 NewV = getTargetShuffleNode(X86ISD::PSHUFLW, dl, MVT::v8i16,
4981 X86::getShufflePSHUFLWImmediate(NewV.getNode()),
4985 // If BestHi >= 0, generate a pshufhw to put the high elements in order,
4986 // and update MaskVals with the new element order.
4987 if (BestHiQuad >= 0) {
4988 SmallVector<int, 8> MaskV;
4989 for (unsigned i = 0; i != 4; ++i)
4991 for (unsigned i = 4; i != 8; ++i) {
4992 int idx = MaskVals[i];
4994 MaskV.push_back(-1);
4996 } else if ((idx / 4) == BestHiQuad) {
4997 MaskV.push_back((idx & 3) + 4);
5000 MaskV.push_back(-1);
5003 NewV = DAG.getVectorShuffle(MVT::v8i16, dl, NewV, DAG.getUNDEF(MVT::v8i16),
5006 if (NewV.getOpcode() == ISD::VECTOR_SHUFFLE && Subtarget->hasSSSE3())
5007 NewV = getTargetShuffleNode(X86ISD::PSHUFHW, dl, MVT::v8i16,
5009 X86::getShufflePSHUFHWImmediate(NewV.getNode()),
5013 // In case BestHi & BestLo were both -1, which means each quadword has a word
5014 // from each of the four input quadwords, calculate the InOrder bitvector now
5015 // before falling through to the insert/extract cleanup.
5016 if (BestLoQuad == -1 && BestHiQuad == -1) {
5018 for (int i = 0; i != 8; ++i)
5019 if (MaskVals[i] < 0 || MaskVals[i] == i)
5023 // The other elements are put in the right place using pextrw and pinsrw.
5024 for (unsigned i = 0; i != 8; ++i) {
5027 int EltIdx = MaskVals[i];
5030 SDValue ExtOp = (EltIdx < 8)
5031 ? DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, V1,
5032 DAG.getIntPtrConstant(EltIdx))
5033 : DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, V2,
5034 DAG.getIntPtrConstant(EltIdx - 8));
5035 NewV = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, NewV, ExtOp,
5036 DAG.getIntPtrConstant(i));
5041 // v16i8 shuffles - Prefer shuffles in the following order:
5042 // 1. [ssse3] 1 x pshufb
5043 // 2. [ssse3] 2 x pshufb + 1 x por
5044 // 3. [all] v8i16 shuffle + N x pextrw + rotate + pinsrw
5046 SDValue LowerVECTOR_SHUFFLEv16i8(ShuffleVectorSDNode *SVOp,
5048 const X86TargetLowering &TLI) {
5049 SDValue V1 = SVOp->getOperand(0);
5050 SDValue V2 = SVOp->getOperand(1);
5051 DebugLoc dl = SVOp->getDebugLoc();
5052 SmallVector<int, 16> MaskVals;
5053 SVOp->getMask(MaskVals);
5055 // If we have SSSE3, case 1 is generated when all result bytes come from
5056 // one of the inputs. Otherwise, case 2 is generated. If no SSSE3 is
5057 // present, fall back to case 3.
5058 // FIXME: kill V2Only once shuffles are canonizalized by getNode.
5061 for (unsigned i = 0; i < 16; ++i) {
5062 int EltIdx = MaskVals[i];
5071 // If SSSE3, use 1 pshufb instruction per vector with elements in the result.
5072 if (TLI.getSubtarget()->hasSSSE3()) {
5073 SmallVector<SDValue,16> pshufbMask;
5075 // If all result elements are from one input vector, then only translate
5076 // undef mask values to 0x80 (zero out result) in the pshufb mask.
5078 // Otherwise, we have elements from both input vectors, and must zero out
5079 // elements that come from V2 in the first mask, and V1 in the second mask
5080 // so that we can OR them together.
5081 bool TwoInputs = !(V1Only || V2Only);
5082 for (unsigned i = 0; i != 16; ++i) {
5083 int EltIdx = MaskVals[i];
5084 if (EltIdx < 0 || (TwoInputs && EltIdx >= 16)) {
5085 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
5088 pshufbMask.push_back(DAG.getConstant(EltIdx, MVT::i8));
5090 // If all the elements are from V2, assign it to V1 and return after
5091 // building the first pshufb.
5094 V1 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V1,
5095 DAG.getNode(ISD::BUILD_VECTOR, dl,
5096 MVT::v16i8, &pshufbMask[0], 16));
5100 // Calculate the shuffle mask for the second input, shuffle it, and
5101 // OR it with the first shuffled input.
5103 for (unsigned i = 0; i != 16; ++i) {
5104 int EltIdx = MaskVals[i];
5106 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
5109 pshufbMask.push_back(DAG.getConstant(EltIdx - 16, MVT::i8));
5111 V2 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V2,
5112 DAG.getNode(ISD::BUILD_VECTOR, dl,
5113 MVT::v16i8, &pshufbMask[0], 16));
5114 return DAG.getNode(ISD::OR, dl, MVT::v16i8, V1, V2);
5117 // No SSSE3 - Calculate in place words and then fix all out of place words
5118 // With 0-16 extracts & inserts. Worst case is 16 bytes out of order from
5119 // the 16 different words that comprise the two doublequadword input vectors.
5120 V1 = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, V1);
5121 V2 = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, V2);
5122 SDValue NewV = V2Only ? V2 : V1;
5123 for (int i = 0; i != 8; ++i) {
5124 int Elt0 = MaskVals[i*2];
5125 int Elt1 = MaskVals[i*2+1];
5127 // This word of the result is all undef, skip it.
5128 if (Elt0 < 0 && Elt1 < 0)
5131 // This word of the result is already in the correct place, skip it.
5132 if (V1Only && (Elt0 == i*2) && (Elt1 == i*2+1))
5134 if (V2Only && (Elt0 == i*2+16) && (Elt1 == i*2+17))
5137 SDValue Elt0Src = Elt0 < 16 ? V1 : V2;
5138 SDValue Elt1Src = Elt1 < 16 ? V1 : V2;
5141 // If Elt0 and Elt1 are defined, are consecutive, and can be load
5142 // using a single extract together, load it and store it.
5143 if ((Elt0 >= 0) && ((Elt0 + 1) == Elt1) && ((Elt0 & 1) == 0)) {
5144 InsElt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, Elt1Src,
5145 DAG.getIntPtrConstant(Elt1 / 2));
5146 NewV = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, NewV, InsElt,
5147 DAG.getIntPtrConstant(i));
5151 // If Elt1 is defined, extract it from the appropriate source. If the
5152 // source byte is not also odd, shift the extracted word left 8 bits
5153 // otherwise clear the bottom 8 bits if we need to do an or.
5155 InsElt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, Elt1Src,
5156 DAG.getIntPtrConstant(Elt1 / 2));
5157 if ((Elt1 & 1) == 0)
5158 InsElt = DAG.getNode(ISD::SHL, dl, MVT::i16, InsElt,
5160 TLI.getShiftAmountTy(InsElt.getValueType())));
5162 InsElt = DAG.getNode(ISD::AND, dl, MVT::i16, InsElt,
5163 DAG.getConstant(0xFF00, MVT::i16));
5165 // If Elt0 is defined, extract it from the appropriate source. If the
5166 // source byte is not also even, shift the extracted word right 8 bits. If
5167 // Elt1 was also defined, OR the extracted values together before
5168 // inserting them in the result.
5170 SDValue InsElt0 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16,
5171 Elt0Src, DAG.getIntPtrConstant(Elt0 / 2));
5172 if ((Elt0 & 1) != 0)
5173 InsElt0 = DAG.getNode(ISD::SRL, dl, MVT::i16, InsElt0,
5175 TLI.getShiftAmountTy(InsElt0.getValueType())));
5177 InsElt0 = DAG.getNode(ISD::AND, dl, MVT::i16, InsElt0,
5178 DAG.getConstant(0x00FF, MVT::i16));
5179 InsElt = Elt1 >= 0 ? DAG.getNode(ISD::OR, dl, MVT::i16, InsElt, InsElt0)
5182 NewV = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, NewV, InsElt,
5183 DAG.getIntPtrConstant(i));
5185 return DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, NewV);
5188 /// RewriteAsNarrowerShuffle - Try rewriting v8i16 and v16i8 shuffles as 4 wide
5189 /// ones, or rewriting v4i32 / v4f32 as 2 wide ones if possible. This can be
5190 /// done when every pair / quad of shuffle mask elements point to elements in
5191 /// the right sequence. e.g.
5192 /// vector_shuffle X, Y, <2, 3, | 10, 11, | 0, 1, | 14, 15>
5194 SDValue RewriteAsNarrowerShuffle(ShuffleVectorSDNode *SVOp,
5195 SelectionDAG &DAG, DebugLoc dl) {
5196 EVT VT = SVOp->getValueType(0);
5197 SDValue V1 = SVOp->getOperand(0);
5198 SDValue V2 = SVOp->getOperand(1);
5199 unsigned NumElems = VT.getVectorNumElements();
5200 unsigned NewWidth = (NumElems == 4) ? 2 : 4;
5202 switch (VT.getSimpleVT().SimpleTy) {
5203 default: assert(false && "Unexpected!");
5204 case MVT::v4f32: NewVT = MVT::v2f64; break;
5205 case MVT::v4i32: NewVT = MVT::v2i64; break;
5206 case MVT::v8i16: NewVT = MVT::v4i32; break;
5207 case MVT::v16i8: NewVT = MVT::v4i32; break;
5210 int Scale = NumElems / NewWidth;
5211 SmallVector<int, 8> MaskVec;
5212 for (unsigned i = 0; i < NumElems; i += Scale) {
5214 for (int j = 0; j < Scale; ++j) {
5215 int EltIdx = SVOp->getMaskElt(i+j);
5219 StartIdx = EltIdx - (EltIdx % Scale);
5220 if (EltIdx != StartIdx + j)
5224 MaskVec.push_back(-1);
5226 MaskVec.push_back(StartIdx / Scale);
5229 V1 = DAG.getNode(ISD::BITCAST, dl, NewVT, V1);
5230 V2 = DAG.getNode(ISD::BITCAST, dl, NewVT, V2);
5231 return DAG.getVectorShuffle(NewVT, dl, V1, V2, &MaskVec[0]);
5234 /// getVZextMovL - Return a zero-extending vector move low node.
5236 static SDValue getVZextMovL(EVT VT, EVT OpVT,
5237 SDValue SrcOp, SelectionDAG &DAG,
5238 const X86Subtarget *Subtarget, DebugLoc dl) {
5239 if (VT == MVT::v2f64 || VT == MVT::v4f32) {
5240 LoadSDNode *LD = NULL;
5241 if (!isScalarLoadToVector(SrcOp.getNode(), &LD))
5242 LD = dyn_cast<LoadSDNode>(SrcOp);
5244 // movssrr and movsdrr do not clear top bits. Try to use movd, movq
5246 MVT ExtVT = (OpVT == MVT::v2f64) ? MVT::i64 : MVT::i32;
5247 if ((ExtVT != MVT::i64 || Subtarget->is64Bit()) &&
5248 SrcOp.getOpcode() == ISD::SCALAR_TO_VECTOR &&
5249 SrcOp.getOperand(0).getOpcode() == ISD::BITCAST &&
5250 SrcOp.getOperand(0).getOperand(0).getValueType() == ExtVT) {
5252 OpVT = (OpVT == MVT::v2f64) ? MVT::v2i64 : MVT::v4i32;
5253 return DAG.getNode(ISD::BITCAST, dl, VT,
5254 DAG.getNode(X86ISD::VZEXT_MOVL, dl, OpVT,
5255 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
5263 return DAG.getNode(ISD::BITCAST, dl, VT,
5264 DAG.getNode(X86ISD::VZEXT_MOVL, dl, OpVT,
5265 DAG.getNode(ISD::BITCAST, dl,
5269 /// LowerVECTOR_SHUFFLE_4wide - Handle all 4 wide cases with a number of
5272 LowerVECTOR_SHUFFLE_4wide(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG) {
5273 SDValue V1 = SVOp->getOperand(0);
5274 SDValue V2 = SVOp->getOperand(1);
5275 DebugLoc dl = SVOp->getDebugLoc();
5276 EVT VT = SVOp->getValueType(0);
5278 SmallVector<std::pair<int, int>, 8> Locs;
5280 SmallVector<int, 8> Mask1(4U, -1);
5281 SmallVector<int, 8> PermMask;
5282 SVOp->getMask(PermMask);
5286 for (unsigned i = 0; i != 4; ++i) {
5287 int Idx = PermMask[i];
5289 Locs[i] = std::make_pair(-1, -1);
5291 assert(Idx < 8 && "Invalid VECTOR_SHUFFLE index!");
5293 Locs[i] = std::make_pair(0, NumLo);
5297 Locs[i] = std::make_pair(1, NumHi);
5299 Mask1[2+NumHi] = Idx;
5305 if (NumLo <= 2 && NumHi <= 2) {
5306 // If no more than two elements come from either vector. This can be
5307 // implemented with two shuffles. First shuffle gather the elements.
5308 // The second shuffle, which takes the first shuffle as both of its
5309 // vector operands, put the elements into the right order.
5310 V1 = DAG.getVectorShuffle(VT, dl, V1, V2, &Mask1[0]);
5312 SmallVector<int, 8> Mask2(4U, -1);
5314 for (unsigned i = 0; i != 4; ++i) {
5315 if (Locs[i].first == -1)
5318 unsigned Idx = (i < 2) ? 0 : 4;
5319 Idx += Locs[i].first * 2 + Locs[i].second;
5324 return DAG.getVectorShuffle(VT, dl, V1, V1, &Mask2[0]);
5325 } else if (NumLo == 3 || NumHi == 3) {
5326 // Otherwise, we must have three elements from one vector, call it X, and
5327 // one element from the other, call it Y. First, use a shufps to build an
5328 // intermediate vector with the one element from Y and the element from X
5329 // that will be in the same half in the final destination (the indexes don't
5330 // matter). Then, use a shufps to build the final vector, taking the half
5331 // containing the element from Y from the intermediate, and the other half
5334 // Normalize it so the 3 elements come from V1.
5335 CommuteVectorShuffleMask(PermMask, VT);
5339 // Find the element from V2.
5341 for (HiIndex = 0; HiIndex < 3; ++HiIndex) {
5342 int Val = PermMask[HiIndex];
5349 Mask1[0] = PermMask[HiIndex];
5351 Mask1[2] = PermMask[HiIndex^1];
5353 V2 = DAG.getVectorShuffle(VT, dl, V1, V2, &Mask1[0]);
5356 Mask1[0] = PermMask[0];
5357 Mask1[1] = PermMask[1];
5358 Mask1[2] = HiIndex & 1 ? 6 : 4;
5359 Mask1[3] = HiIndex & 1 ? 4 : 6;
5360 return DAG.getVectorShuffle(VT, dl, V1, V2, &Mask1[0]);
5362 Mask1[0] = HiIndex & 1 ? 2 : 0;
5363 Mask1[1] = HiIndex & 1 ? 0 : 2;
5364 Mask1[2] = PermMask[2];
5365 Mask1[3] = PermMask[3];
5370 return DAG.getVectorShuffle(VT, dl, V2, V1, &Mask1[0]);
5374 // Break it into (shuffle shuffle_hi, shuffle_lo).
5377 SmallVector<int,8> LoMask(4U, -1);
5378 SmallVector<int,8> HiMask(4U, -1);
5380 SmallVector<int,8> *MaskPtr = &LoMask;
5381 unsigned MaskIdx = 0;
5384 for (unsigned i = 0; i != 4; ++i) {
5391 int Idx = PermMask[i];
5393 Locs[i] = std::make_pair(-1, -1);
5394 } else if (Idx < 4) {
5395 Locs[i] = std::make_pair(MaskIdx, LoIdx);
5396 (*MaskPtr)[LoIdx] = Idx;
5399 Locs[i] = std::make_pair(MaskIdx, HiIdx);
5400 (*MaskPtr)[HiIdx] = Idx;
5405 SDValue LoShuffle = DAG.getVectorShuffle(VT, dl, V1, V2, &LoMask[0]);
5406 SDValue HiShuffle = DAG.getVectorShuffle(VT, dl, V1, V2, &HiMask[0]);
5407 SmallVector<int, 8> MaskOps;
5408 for (unsigned i = 0; i != 4; ++i) {
5409 if (Locs[i].first == -1) {
5410 MaskOps.push_back(-1);
5412 unsigned Idx = Locs[i].first * 4 + Locs[i].second;
5413 MaskOps.push_back(Idx);
5416 return DAG.getVectorShuffle(VT, dl, LoShuffle, HiShuffle, &MaskOps[0]);
5419 static bool MayFoldVectorLoad(SDValue V) {
5420 if (V.hasOneUse() && V.getOpcode() == ISD::BITCAST)
5421 V = V.getOperand(0);
5422 if (V.hasOneUse() && V.getOpcode() == ISD::SCALAR_TO_VECTOR)
5423 V = V.getOperand(0);
5429 // FIXME: the version above should always be used. Since there's
5430 // a bug where several vector shuffles can't be folded because the
5431 // DAG is not updated during lowering and a node claims to have two
5432 // uses while it only has one, use this version, and let isel match
5433 // another instruction if the load really happens to have more than
5434 // one use. Remove this version after this bug get fixed.
5435 // rdar://8434668, PR8156
5436 static bool RelaxedMayFoldVectorLoad(SDValue V) {
5437 if (V.hasOneUse() && V.getOpcode() == ISD::BITCAST)
5438 V = V.getOperand(0);
5439 if (V.hasOneUse() && V.getOpcode() == ISD::SCALAR_TO_VECTOR)
5440 V = V.getOperand(0);
5441 if (ISD::isNormalLoad(V.getNode()))
5446 /// CanFoldShuffleIntoVExtract - Check if the current shuffle is used by
5447 /// a vector extract, and if both can be later optimized into a single load.
5448 /// This is done in visitEXTRACT_VECTOR_ELT and the conditions are checked
5449 /// here because otherwise a target specific shuffle node is going to be
5450 /// emitted for this shuffle, and the optimization not done.
5451 /// FIXME: This is probably not the best approach, but fix the problem
5452 /// until the right path is decided.
5454 bool CanXFormVExtractWithShuffleIntoLoad(SDValue V, SelectionDAG &DAG,
5455 const TargetLowering &TLI) {
5456 EVT VT = V.getValueType();
5457 ShuffleVectorSDNode *SVOp = dyn_cast<ShuffleVectorSDNode>(V);
5459 // Be sure that the vector shuffle is present in a pattern like this:
5460 // (vextract (v4f32 shuffle (load $addr), <1,u,u,u>), c) -> (f32 load $addr)
5464 SDNode *N = *V.getNode()->use_begin();
5465 if (N->getOpcode() != ISD::EXTRACT_VECTOR_ELT)
5468 SDValue EltNo = N->getOperand(1);
5469 if (!isa<ConstantSDNode>(EltNo))
5472 // If the bit convert changed the number of elements, it is unsafe
5473 // to examine the mask.
5474 bool HasShuffleIntoBitcast = false;
5475 if (V.getOpcode() == ISD::BITCAST) {
5476 EVT SrcVT = V.getOperand(0).getValueType();
5477 if (SrcVT.getVectorNumElements() != VT.getVectorNumElements())
5479 V = V.getOperand(0);
5480 HasShuffleIntoBitcast = true;
5483 // Select the input vector, guarding against out of range extract vector.
5484 unsigned NumElems = VT.getVectorNumElements();
5485 unsigned Elt = cast<ConstantSDNode>(EltNo)->getZExtValue();
5486 int Idx = (Elt > NumElems) ? -1 : SVOp->getMaskElt(Elt);
5487 V = (Idx < (int)NumElems) ? V.getOperand(0) : V.getOperand(1);
5489 // Skip one more bit_convert if necessary
5490 if (V.getOpcode() == ISD::BITCAST)
5491 V = V.getOperand(0);
5493 if (ISD::isNormalLoad(V.getNode())) {
5494 // Is the original load suitable?
5495 LoadSDNode *LN0 = cast<LoadSDNode>(V);
5497 // FIXME: avoid the multi-use bug that is preventing lots of
5498 // of foldings to be detected, this is still wrong of course, but
5499 // give the temporary desired behavior, and if it happens that
5500 // the load has real more uses, during isel it will not fold, and
5501 // will generate poor code.
5502 if (!LN0 || LN0->isVolatile()) // || !LN0->hasOneUse()
5505 if (!HasShuffleIntoBitcast)
5508 // If there's a bitcast before the shuffle, check if the load type and
5509 // alignment is valid.
5510 unsigned Align = LN0->getAlignment();
5512 TLI.getTargetData()->getABITypeAlignment(
5513 VT.getTypeForEVT(*DAG.getContext()));
5515 if (NewAlign > Align || !TLI.isOperationLegalOrCustom(ISD::LOAD, VT))
5523 SDValue getMOVDDup(SDValue &Op, DebugLoc &dl, SDValue V1, SelectionDAG &DAG) {
5524 EVT VT = Op.getValueType();
5526 // Canonizalize to v2f64.
5527 V1 = DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, V1);
5528 return DAG.getNode(ISD::BITCAST, dl, VT,
5529 getTargetShuffleNode(X86ISD::MOVDDUP, dl, MVT::v2f64,
5534 SDValue getMOVLowToHigh(SDValue &Op, DebugLoc &dl, SelectionDAG &DAG,
5536 SDValue V1 = Op.getOperand(0);
5537 SDValue V2 = Op.getOperand(1);
5538 EVT VT = Op.getValueType();
5540 assert(VT != MVT::v2i64 && "unsupported shuffle type");
5542 if (HasSSE2 && VT == MVT::v2f64)
5543 return getTargetShuffleNode(X86ISD::MOVLHPD, dl, VT, V1, V2, DAG);
5546 return getTargetShuffleNode(X86ISD::MOVLHPS, dl, VT, V1, V2, DAG);
5550 SDValue getMOVHighToLow(SDValue &Op, DebugLoc &dl, SelectionDAG &DAG) {
5551 SDValue V1 = Op.getOperand(0);
5552 SDValue V2 = Op.getOperand(1);
5553 EVT VT = Op.getValueType();
5555 assert((VT == MVT::v4i32 || VT == MVT::v4f32) &&
5556 "unsupported shuffle type");
5558 if (V2.getOpcode() == ISD::UNDEF)
5562 return getTargetShuffleNode(X86ISD::MOVHLPS, dl, VT, V1, V2, DAG);
5566 SDValue getMOVLP(SDValue &Op, DebugLoc &dl, SelectionDAG &DAG, bool HasSSE2) {
5567 SDValue V1 = Op.getOperand(0);
5568 SDValue V2 = Op.getOperand(1);
5569 EVT VT = Op.getValueType();
5570 unsigned NumElems = VT.getVectorNumElements();
5572 // Use MOVLPS and MOVLPD in case V1 or V2 are loads. During isel, the second
5573 // operand of these instructions is only memory, so check if there's a
5574 // potencial load folding here, otherwise use SHUFPS or MOVSD to match the
5576 bool CanFoldLoad = false;
5578 // Trivial case, when V2 comes from a load.
5579 if (MayFoldVectorLoad(V2))
5582 // When V1 is a load, it can be folded later into a store in isel, example:
5583 // (store (v4f32 (X86Movlps (load addr:$src1), VR128:$src2)), addr:$src1)
5585 // (MOVLPSmr addr:$src1, VR128:$src2)
5586 // So, recognize this potential and also use MOVLPS or MOVLPD
5587 if (MayFoldVectorLoad(V1) && MayFoldIntoStore(Op))
5590 // Both of them can't be memory operations though.
5591 if (MayFoldVectorLoad(V1) && MayFoldVectorLoad(V2))
5592 CanFoldLoad = false;
5595 if (HasSSE2 && NumElems == 2)
5596 return getTargetShuffleNode(X86ISD::MOVLPD, dl, VT, V1, V2, DAG);
5599 return getTargetShuffleNode(X86ISD::MOVLPS, dl, VT, V1, V2, DAG);
5602 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
5603 // movl and movlp will both match v2i64, but v2i64 is never matched by
5604 // movl earlier because we make it strict to avoid messing with the movlp load
5605 // folding logic (see the code above getMOVLP call). Match it here then,
5606 // this is horrible, but will stay like this until we move all shuffle
5607 // matching to x86 specific nodes. Note that for the 1st condition all
5608 // types are matched with movsd.
5609 if ((HasSSE2 && NumElems == 2) || !X86::isMOVLMask(SVOp))
5610 return getTargetShuffleNode(X86ISD::MOVSD, dl, VT, V1, V2, DAG);
5612 return getTargetShuffleNode(X86ISD::MOVSS, dl, VT, V1, V2, DAG);
5615 assert(VT != MVT::v4i32 && "unsupported shuffle type");
5617 // Invert the operand order and use SHUFPS to match it.
5618 return getTargetShuffleNode(X86ISD::SHUFPS, dl, VT, V2, V1,
5619 X86::getShuffleSHUFImmediate(SVOp), DAG);
5622 static inline unsigned getUNPCKLOpcode(EVT VT, const X86Subtarget *Subtarget) {
5623 switch(VT.getSimpleVT().SimpleTy) {
5624 case MVT::v4i32: return X86ISD::PUNPCKLDQ;
5625 case MVT::v2i64: return X86ISD::PUNPCKLQDQ;
5627 return Subtarget->hasAVX() ? X86ISD::VUNPCKLPS : X86ISD::UNPCKLPS;
5629 return Subtarget->hasAVX() ? X86ISD::VUNPCKLPD : X86ISD::UNPCKLPD;
5630 case MVT::v8f32: return X86ISD::VUNPCKLPSY;
5631 case MVT::v4f64: return X86ISD::VUNPCKLPDY;
5632 case MVT::v16i8: return X86ISD::PUNPCKLBW;
5633 case MVT::v8i16: return X86ISD::PUNPCKLWD;
5635 llvm_unreachable("Unknown type for unpckl");
5640 static inline unsigned getUNPCKHOpcode(EVT VT) {
5641 switch(VT.getSimpleVT().SimpleTy) {
5642 case MVT::v4i32: return X86ISD::PUNPCKHDQ;
5643 case MVT::v2i64: return X86ISD::PUNPCKHQDQ;
5644 case MVT::v4f32: return X86ISD::UNPCKHPS;
5645 case MVT::v2f64: return X86ISD::UNPCKHPD;
5646 case MVT::v16i8: return X86ISD::PUNPCKHBW;
5647 case MVT::v8i16: return X86ISD::PUNPCKHWD;
5649 llvm_unreachable("Unknown type for unpckh");
5655 SDValue NormalizeVectorShuffle(SDValue Op, SelectionDAG &DAG,
5656 const TargetLowering &TLI,
5657 const X86Subtarget *Subtarget) {
5658 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
5659 EVT VT = Op.getValueType();
5660 DebugLoc dl = Op.getDebugLoc();
5661 SDValue V1 = Op.getOperand(0);
5662 SDValue V2 = Op.getOperand(1);
5664 if (isZeroShuffle(SVOp))
5665 return getZeroVector(VT, Subtarget->hasSSE2(), DAG, dl);
5667 // Handle splat operations
5668 if (SVOp->isSplat()) {
5669 // Special case, this is the only place now where it's
5670 // allowed to return a vector_shuffle operation without
5671 // using a target specific node, because *hopefully* it
5672 // will be optimized away by the dag combiner.
5673 if (VT.getVectorNumElements() <= 4 &&
5674 CanXFormVExtractWithShuffleIntoLoad(Op, DAG, TLI))
5677 // Handle splats by matching through known masks
5678 if (VT.getVectorNumElements() <= 4)
5681 // Canonicalize all of the remaining to v4f32.
5682 return PromoteSplat(SVOp, DAG);
5685 // If the shuffle can be profitably rewritten as a narrower shuffle, then
5687 if (VT == MVT::v8i16 || VT == MVT::v16i8) {
5688 SDValue NewOp = RewriteAsNarrowerShuffle(SVOp, DAG, dl);
5689 if (NewOp.getNode())
5690 return DAG.getNode(ISD::BITCAST, dl, VT, NewOp);
5691 } else if ((VT == MVT::v4i32 || (VT == MVT::v4f32 && Subtarget->hasSSE2()))) {
5692 // FIXME: Figure out a cleaner way to do this.
5693 // Try to make use of movq to zero out the top part.
5694 if (ISD::isBuildVectorAllZeros(V2.getNode())) {
5695 SDValue NewOp = RewriteAsNarrowerShuffle(SVOp, DAG, dl);
5696 if (NewOp.getNode()) {
5697 if (isCommutedMOVL(cast<ShuffleVectorSDNode>(NewOp), true, false))
5698 return getVZextMovL(VT, NewOp.getValueType(), NewOp.getOperand(0),
5699 DAG, Subtarget, dl);
5701 } else if (ISD::isBuildVectorAllZeros(V1.getNode())) {
5702 SDValue NewOp = RewriteAsNarrowerShuffle(SVOp, DAG, dl);
5703 if (NewOp.getNode() && X86::isMOVLMask(cast<ShuffleVectorSDNode>(NewOp)))
5704 return getVZextMovL(VT, NewOp.getValueType(), NewOp.getOperand(1),
5705 DAG, Subtarget, dl);
5712 X86TargetLowering::LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) const {
5713 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
5714 SDValue V1 = Op.getOperand(0);
5715 SDValue V2 = Op.getOperand(1);
5716 EVT VT = Op.getValueType();
5717 DebugLoc dl = Op.getDebugLoc();
5718 unsigned NumElems = VT.getVectorNumElements();
5719 bool isMMX = VT.getSizeInBits() == 64;
5720 bool V1IsUndef = V1.getOpcode() == ISD::UNDEF;
5721 bool V2IsUndef = V2.getOpcode() == ISD::UNDEF;
5722 bool V1IsSplat = false;
5723 bool V2IsSplat = false;
5724 bool HasSSE2 = Subtarget->hasSSE2() || Subtarget->hasAVX();
5725 bool HasSSE3 = Subtarget->hasSSE3() || Subtarget->hasAVX();
5726 bool HasSSSE3 = Subtarget->hasSSSE3() || Subtarget->hasAVX();
5727 MachineFunction &MF = DAG.getMachineFunction();
5728 bool OptForSize = MF.getFunction()->hasFnAttr(Attribute::OptimizeForSize);
5730 // Shuffle operations on MMX not supported.
5734 // Vector shuffle lowering takes 3 steps:
5736 // 1) Normalize the input vectors. Here splats, zeroed vectors, profitable
5737 // narrowing and commutation of operands should be handled.
5738 // 2) Matching of shuffles with known shuffle masks to x86 target specific
5740 // 3) Rewriting of unmatched masks into new generic shuffle operations,
5741 // so the shuffle can be broken into other shuffles and the legalizer can
5742 // try the lowering again.
5744 // The general ideia is that no vector_shuffle operation should be left to
5745 // be matched during isel, all of them must be converted to a target specific
5748 // Normalize the input vectors. Here splats, zeroed vectors, profitable
5749 // narrowing and commutation of operands should be handled. The actual code
5750 // doesn't include all of those, work in progress...
5751 SDValue NewOp = NormalizeVectorShuffle(Op, DAG, *this, Subtarget);
5752 if (NewOp.getNode())
5755 // NOTE: isPSHUFDMask can also match both masks below (unpckl_undef and
5756 // unpckh_undef). Only use pshufd if speed is more important than size.
5757 if (OptForSize && X86::isUNPCKL_v_undef_Mask(SVOp))
5758 if (VT != MVT::v2i64 && VT != MVT::v2f64)
5759 return getTargetShuffleNode(getUNPCKLOpcode(VT, getSubtarget()), dl, VT, V1, V1, DAG);
5760 if (OptForSize && X86::isUNPCKH_v_undef_Mask(SVOp))
5761 if (VT != MVT::v2i64 && VT != MVT::v2f64)
5762 return getTargetShuffleNode(getUNPCKHOpcode(VT), dl, VT, V1, V1, DAG);
5764 if (X86::isMOVDDUPMask(SVOp) && HasSSE3 && V2IsUndef &&
5765 RelaxedMayFoldVectorLoad(V1))
5766 return getMOVDDup(Op, dl, V1, DAG);
5768 if (X86::isMOVHLPS_v_undef_Mask(SVOp))
5769 return getMOVHighToLow(Op, dl, DAG);
5771 // Use to match splats
5772 if (HasSSE2 && X86::isUNPCKHMask(SVOp) && V2IsUndef &&
5773 (VT == MVT::v2f64 || VT == MVT::v2i64))
5774 return getTargetShuffleNode(getUNPCKHOpcode(VT), dl, VT, V1, V1, DAG);
5776 if (X86::isPSHUFDMask(SVOp)) {
5777 // The actual implementation will match the mask in the if above and then
5778 // during isel it can match several different instructions, not only pshufd
5779 // as its name says, sad but true, emulate the behavior for now...
5780 if (X86::isMOVDDUPMask(SVOp) && ((VT == MVT::v4f32 || VT == MVT::v2i64)))
5781 return getTargetShuffleNode(X86ISD::MOVLHPS, dl, VT, V1, V1, DAG);
5783 unsigned TargetMask = X86::getShuffleSHUFImmediate(SVOp);
5785 if (HasSSE2 && (VT == MVT::v4f32 || VT == MVT::v4i32))
5786 return getTargetShuffleNode(X86ISD::PSHUFD, dl, VT, V1, TargetMask, DAG);
5788 if (HasSSE2 && (VT == MVT::v2i64 || VT == MVT::v2f64))
5789 return getTargetShuffleNode(X86ISD::SHUFPD, dl, VT, V1, V1,
5792 if (VT == MVT::v4f32)
5793 return getTargetShuffleNode(X86ISD::SHUFPS, dl, VT, V1, V1,
5797 // Check if this can be converted into a logical shift.
5798 bool isLeft = false;
5801 bool isShift = getSubtarget()->hasSSE2() &&
5802 isVectorShift(SVOp, DAG, isLeft, ShVal, ShAmt);
5803 if (isShift && ShVal.hasOneUse()) {
5804 // If the shifted value has multiple uses, it may be cheaper to use
5805 // v_set0 + movlhps or movhlps, etc.
5806 EVT EltVT = VT.getVectorElementType();
5807 ShAmt *= EltVT.getSizeInBits();
5808 return getVShift(isLeft, VT, ShVal, ShAmt, DAG, *this, dl);
5811 if (X86::isMOVLMask(SVOp)) {
5814 if (ISD::isBuildVectorAllZeros(V1.getNode()))
5815 return getVZextMovL(VT, VT, V2, DAG, Subtarget, dl);
5816 if (!X86::isMOVLPMask(SVOp)) {
5817 if (HasSSE2 && (VT == MVT::v2i64 || VT == MVT::v2f64))
5818 return getTargetShuffleNode(X86ISD::MOVSD, dl, VT, V1, V2, DAG);
5820 if (VT == MVT::v4i32 || VT == MVT::v4f32)
5821 return getTargetShuffleNode(X86ISD::MOVSS, dl, VT, V1, V2, DAG);
5825 // FIXME: fold these into legal mask.
5826 if (X86::isMOVLHPSMask(SVOp) && !X86::isUNPCKLMask(SVOp))
5827 return getMOVLowToHigh(Op, dl, DAG, HasSSE2);
5829 if (X86::isMOVHLPSMask(SVOp))
5830 return getMOVHighToLow(Op, dl, DAG);
5832 if (X86::isMOVSHDUPMask(SVOp) && HasSSE3 && V2IsUndef && NumElems == 4)
5833 return getTargetShuffleNode(X86ISD::MOVSHDUP, dl, VT, V1, DAG);
5835 if (X86::isMOVSLDUPMask(SVOp) && HasSSE3 && V2IsUndef && NumElems == 4)
5836 return getTargetShuffleNode(X86ISD::MOVSLDUP, dl, VT, V1, DAG);
5838 if (X86::isMOVLPMask(SVOp))
5839 return getMOVLP(Op, dl, DAG, HasSSE2);
5841 if (ShouldXformToMOVHLPS(SVOp) ||
5842 ShouldXformToMOVLP(V1.getNode(), V2.getNode(), SVOp))
5843 return CommuteVectorShuffle(SVOp, DAG);
5846 // No better options. Use a vshl / vsrl.
5847 EVT EltVT = VT.getVectorElementType();
5848 ShAmt *= EltVT.getSizeInBits();
5849 return getVShift(isLeft, VT, ShVal, ShAmt, DAG, *this, dl);
5852 bool Commuted = false;
5853 // FIXME: This should also accept a bitcast of a splat? Be careful, not
5854 // 1,1,1,1 -> v8i16 though.
5855 V1IsSplat = isSplatVector(V1.getNode());
5856 V2IsSplat = isSplatVector(V2.getNode());
5858 // Canonicalize the splat or undef, if present, to be on the RHS.
5859 if ((V1IsSplat || V1IsUndef) && !(V2IsSplat || V2IsUndef)) {
5860 Op = CommuteVectorShuffle(SVOp, DAG);
5861 SVOp = cast<ShuffleVectorSDNode>(Op);
5862 V1 = SVOp->getOperand(0);
5863 V2 = SVOp->getOperand(1);
5864 std::swap(V1IsSplat, V2IsSplat);
5865 std::swap(V1IsUndef, V2IsUndef);
5869 if (isCommutedMOVL(SVOp, V2IsSplat, V2IsUndef)) {
5870 // Shuffling low element of v1 into undef, just return v1.
5873 // If V2 is a splat, the mask may be malformed such as <4,3,3,3>, which
5874 // the instruction selector will not match, so get a canonical MOVL with
5875 // swapped operands to undo the commute.
5876 return getMOVL(DAG, dl, VT, V2, V1);
5879 if (X86::isUNPCKLMask(SVOp))
5880 return getTargetShuffleNode(getUNPCKLOpcode(VT, getSubtarget()),
5881 dl, VT, V1, V2, DAG);
5883 if (X86::isUNPCKHMask(SVOp))
5884 return getTargetShuffleNode(getUNPCKHOpcode(VT), dl, VT, V1, V2, DAG);
5887 // Normalize mask so all entries that point to V2 points to its first
5888 // element then try to match unpck{h|l} again. If match, return a
5889 // new vector_shuffle with the corrected mask.
5890 SDValue NewMask = NormalizeMask(SVOp, DAG);
5891 ShuffleVectorSDNode *NSVOp = cast<ShuffleVectorSDNode>(NewMask);
5892 if (NSVOp != SVOp) {
5893 if (X86::isUNPCKLMask(NSVOp, true)) {
5895 } else if (X86::isUNPCKHMask(NSVOp, true)) {
5902 // Commute is back and try unpck* again.
5903 // FIXME: this seems wrong.
5904 SDValue NewOp = CommuteVectorShuffle(SVOp, DAG);
5905 ShuffleVectorSDNode *NewSVOp = cast<ShuffleVectorSDNode>(NewOp);
5907 if (X86::isUNPCKLMask(NewSVOp))
5908 return getTargetShuffleNode(getUNPCKLOpcode(VT, getSubtarget()),
5909 dl, VT, V2, V1, DAG);
5911 if (X86::isUNPCKHMask(NewSVOp))
5912 return getTargetShuffleNode(getUNPCKHOpcode(VT), dl, VT, V2, V1, DAG);
5915 // Normalize the node to match x86 shuffle ops if needed
5916 if (V2.getOpcode() != ISD::UNDEF && isCommutedSHUFP(SVOp))
5917 return CommuteVectorShuffle(SVOp, DAG);
5919 // The checks below are all present in isShuffleMaskLegal, but they are
5920 // inlined here right now to enable us to directly emit target specific
5921 // nodes, and remove one by one until they don't return Op anymore.
5922 SmallVector<int, 16> M;
5925 if (isPALIGNRMask(M, VT, HasSSSE3))
5926 return getTargetShuffleNode(X86ISD::PALIGN, dl, VT, V1, V2,
5927 X86::getShufflePALIGNRImmediate(SVOp),
5930 if (ShuffleVectorSDNode::isSplatMask(&M[0], VT) &&
5931 SVOp->getSplatIndex() == 0 && V2IsUndef) {
5932 if (VT == MVT::v2f64) {
5933 X86ISD::NodeType Opcode =
5934 getSubtarget()->hasAVX() ? X86ISD::VUNPCKLPD : X86ISD::UNPCKLPD;
5935 return getTargetShuffleNode(Opcode, dl, VT, V1, V1, DAG);
5937 if (VT == MVT::v2i64)
5938 return getTargetShuffleNode(X86ISD::PUNPCKLQDQ, dl, VT, V1, V1, DAG);
5941 if (isPSHUFHWMask(M, VT))
5942 return getTargetShuffleNode(X86ISD::PSHUFHW, dl, VT, V1,
5943 X86::getShufflePSHUFHWImmediate(SVOp),
5946 if (isPSHUFLWMask(M, VT))
5947 return getTargetShuffleNode(X86ISD::PSHUFLW, dl, VT, V1,
5948 X86::getShufflePSHUFLWImmediate(SVOp),
5951 if (isSHUFPMask(M, VT)) {
5952 unsigned TargetMask = X86::getShuffleSHUFImmediate(SVOp);
5953 if (VT == MVT::v4f32 || VT == MVT::v4i32)
5954 return getTargetShuffleNode(X86ISD::SHUFPS, dl, VT, V1, V2,
5956 if (VT == MVT::v2f64 || VT == MVT::v2i64)
5957 return getTargetShuffleNode(X86ISD::SHUFPD, dl, VT, V1, V2,
5961 if (X86::isUNPCKL_v_undef_Mask(SVOp))
5962 if (VT != MVT::v2i64 && VT != MVT::v2f64)
5963 return getTargetShuffleNode(getUNPCKLOpcode(VT, getSubtarget()),
5964 dl, VT, V1, V1, DAG);
5965 if (X86::isUNPCKH_v_undef_Mask(SVOp))
5966 if (VT != MVT::v2i64 && VT != MVT::v2f64)
5967 return getTargetShuffleNode(getUNPCKHOpcode(VT), dl, VT, V1, V1, DAG);
5969 // Handle v8i16 specifically since SSE can do byte extraction and insertion.
5970 if (VT == MVT::v8i16) {
5971 SDValue NewOp = LowerVECTOR_SHUFFLEv8i16(Op, DAG);
5972 if (NewOp.getNode())
5976 if (VT == MVT::v16i8) {
5977 SDValue NewOp = LowerVECTOR_SHUFFLEv16i8(SVOp, DAG, *this);
5978 if (NewOp.getNode())
5982 // Handle all 4 wide cases with a number of shuffles.
5984 return LowerVECTOR_SHUFFLE_4wide(SVOp, DAG);
5990 X86TargetLowering::LowerEXTRACT_VECTOR_ELT_SSE4(SDValue Op,
5991 SelectionDAG &DAG) const {
5992 EVT VT = Op.getValueType();
5993 DebugLoc dl = Op.getDebugLoc();
5994 if (VT.getSizeInBits() == 8) {
5995 SDValue Extract = DAG.getNode(X86ISD::PEXTRB, dl, MVT::i32,
5996 Op.getOperand(0), Op.getOperand(1));
5997 SDValue Assert = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Extract,
5998 DAG.getValueType(VT));
5999 return DAG.getNode(ISD::TRUNCATE, dl, VT, Assert);
6000 } else if (VT.getSizeInBits() == 16) {
6001 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
6002 // If Idx is 0, it's cheaper to do a move instead of a pextrw.
6004 return DAG.getNode(ISD::TRUNCATE, dl, MVT::i16,
6005 DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32,
6006 DAG.getNode(ISD::BITCAST, dl,
6010 SDValue Extract = DAG.getNode(X86ISD::PEXTRW, dl, MVT::i32,
6011 Op.getOperand(0), Op.getOperand(1));
6012 SDValue Assert = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Extract,
6013 DAG.getValueType(VT));
6014 return DAG.getNode(ISD::TRUNCATE, dl, VT, Assert);
6015 } else if (VT == MVT::f32) {
6016 // EXTRACTPS outputs to a GPR32 register which will require a movd to copy
6017 // the result back to FR32 register. It's only worth matching if the
6018 // result has a single use which is a store or a bitcast to i32. And in
6019 // the case of a store, it's not worth it if the index is a constant 0,
6020 // because a MOVSSmr can be used instead, which is smaller and faster.
6021 if (!Op.hasOneUse())
6023 SDNode *User = *Op.getNode()->use_begin();
6024 if ((User->getOpcode() != ISD::STORE ||
6025 (isa<ConstantSDNode>(Op.getOperand(1)) &&
6026 cast<ConstantSDNode>(Op.getOperand(1))->isNullValue())) &&
6027 (User->getOpcode() != ISD::BITCAST ||
6028 User->getValueType(0) != MVT::i32))
6030 SDValue Extract = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32,
6031 DAG.getNode(ISD::BITCAST, dl, MVT::v4i32,
6034 return DAG.getNode(ISD::BITCAST, dl, MVT::f32, Extract);
6035 } else if (VT == MVT::i32) {
6036 // ExtractPS works with constant index.
6037 if (isa<ConstantSDNode>(Op.getOperand(1)))
6045 X86TargetLowering::LowerEXTRACT_VECTOR_ELT(SDValue Op,
6046 SelectionDAG &DAG) const {
6047 if (!isa<ConstantSDNode>(Op.getOperand(1)))
6050 SDValue Vec = Op.getOperand(0);
6051 EVT VecVT = Vec.getValueType();
6053 // If this is a 256-bit vector result, first extract the 128-bit
6054 // vector and then extract from the 128-bit vector.
6055 if (VecVT.getSizeInBits() > 128) {
6056 DebugLoc dl = Op.getNode()->getDebugLoc();
6057 unsigned NumElems = VecVT.getVectorNumElements();
6058 SDValue Idx = Op.getOperand(1);
6060 if (!isa<ConstantSDNode>(Idx))
6063 unsigned ExtractNumElems = NumElems / (VecVT.getSizeInBits() / 128);
6064 unsigned IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
6066 // Get the 128-bit vector.
6067 bool Upper = IdxVal >= ExtractNumElems;
6068 Vec = Extract128BitVector(Vec, Idx, DAG, dl);
6071 SDValue ScaledIdx = Idx;
6073 ScaledIdx = DAG.getNode(ISD::SUB, dl, Idx.getValueType(), Idx,
6074 DAG.getConstant(ExtractNumElems,
6075 Idx.getValueType()));
6076 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, Op.getValueType(), Vec,
6080 assert(Vec.getValueSizeInBits() <= 128 && "Unexpected vector length");
6082 if (Subtarget->hasSSE41()) {
6083 SDValue Res = LowerEXTRACT_VECTOR_ELT_SSE4(Op, DAG);
6088 EVT VT = Op.getValueType();
6089 DebugLoc dl = Op.getDebugLoc();
6090 // TODO: handle v16i8.
6091 if (VT.getSizeInBits() == 16) {
6092 SDValue Vec = Op.getOperand(0);
6093 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
6095 return DAG.getNode(ISD::TRUNCATE, dl, MVT::i16,
6096 DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32,
6097 DAG.getNode(ISD::BITCAST, dl,
6100 // Transform it so it match pextrw which produces a 32-bit result.
6101 EVT EltVT = MVT::i32;
6102 SDValue Extract = DAG.getNode(X86ISD::PEXTRW, dl, EltVT,
6103 Op.getOperand(0), Op.getOperand(1));
6104 SDValue Assert = DAG.getNode(ISD::AssertZext, dl, EltVT, Extract,
6105 DAG.getValueType(VT));
6106 return DAG.getNode(ISD::TRUNCATE, dl, VT, Assert);
6107 } else if (VT.getSizeInBits() == 32) {
6108 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
6112 // SHUFPS the element to the lowest double word, then movss.
6113 int Mask[4] = { Idx, -1, -1, -1 };
6114 EVT VVT = Op.getOperand(0).getValueType();
6115 SDValue Vec = DAG.getVectorShuffle(VVT, dl, Op.getOperand(0),
6116 DAG.getUNDEF(VVT), Mask);
6117 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, VT, Vec,
6118 DAG.getIntPtrConstant(0));
6119 } else if (VT.getSizeInBits() == 64) {
6120 // FIXME: .td only matches this for <2 x f64>, not <2 x i64> on 32b
6121 // FIXME: seems like this should be unnecessary if mov{h,l}pd were taught
6122 // to match extract_elt for f64.
6123 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
6127 // UNPCKHPD the element to the lowest double word, then movsd.
6128 // Note if the lower 64 bits of the result of the UNPCKHPD is then stored
6129 // to a f64mem, the whole operation is folded into a single MOVHPDmr.
6130 int Mask[2] = { 1, -1 };
6131 EVT VVT = Op.getOperand(0).getValueType();
6132 SDValue Vec = DAG.getVectorShuffle(VVT, dl, Op.getOperand(0),
6133 DAG.getUNDEF(VVT), Mask);
6134 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, VT, Vec,
6135 DAG.getIntPtrConstant(0));
6142 X86TargetLowering::LowerINSERT_VECTOR_ELT_SSE4(SDValue Op,
6143 SelectionDAG &DAG) const {
6144 EVT VT = Op.getValueType();
6145 EVT EltVT = VT.getVectorElementType();
6146 DebugLoc dl = Op.getDebugLoc();
6148 SDValue N0 = Op.getOperand(0);
6149 SDValue N1 = Op.getOperand(1);
6150 SDValue N2 = Op.getOperand(2);
6152 if ((EltVT.getSizeInBits() == 8 || EltVT.getSizeInBits() == 16) &&
6153 isa<ConstantSDNode>(N2)) {
6155 if (VT == MVT::v8i16)
6156 Opc = X86ISD::PINSRW;
6157 else if (VT == MVT::v16i8)
6158 Opc = X86ISD::PINSRB;
6160 Opc = X86ISD::PINSRB;
6162 // Transform it so it match pinsr{b,w} which expects a GR32 as its second
6164 if (N1.getValueType() != MVT::i32)
6165 N1 = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, N1);
6166 if (N2.getValueType() != MVT::i32)
6167 N2 = DAG.getIntPtrConstant(cast<ConstantSDNode>(N2)->getZExtValue());
6168 return DAG.getNode(Opc, dl, VT, N0, N1, N2);
6169 } else if (EltVT == MVT::f32 && isa<ConstantSDNode>(N2)) {
6170 // Bits [7:6] of the constant are the source select. This will always be
6171 // zero here. The DAG Combiner may combine an extract_elt index into these
6172 // bits. For example (insert (extract, 3), 2) could be matched by putting
6173 // the '3' into bits [7:6] of X86ISD::INSERTPS.
6174 // Bits [5:4] of the constant are the destination select. This is the
6175 // value of the incoming immediate.
6176 // Bits [3:0] of the constant are the zero mask. The DAG Combiner may
6177 // combine either bitwise AND or insert of float 0.0 to set these bits.
6178 N2 = DAG.getIntPtrConstant(cast<ConstantSDNode>(N2)->getZExtValue() << 4);
6179 // Create this as a scalar to vector..
6180 N1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4f32, N1);
6181 return DAG.getNode(X86ISD::INSERTPS, dl, VT, N0, N1, N2);
6182 } else if (EltVT == MVT::i32 && isa<ConstantSDNode>(N2)) {
6183 // PINSR* works with constant index.
6190 X86TargetLowering::LowerINSERT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) const {
6191 EVT VT = Op.getValueType();
6192 EVT EltVT = VT.getVectorElementType();
6194 DebugLoc dl = Op.getDebugLoc();
6195 SDValue N0 = Op.getOperand(0);
6196 SDValue N1 = Op.getOperand(1);
6197 SDValue N2 = Op.getOperand(2);
6199 // If this is a 256-bit vector result, first insert into a 128-bit
6200 // vector and then insert into the 256-bit vector.
6201 if (VT.getSizeInBits() > 128) {
6202 if (!isa<ConstantSDNode>(N2))
6205 // Get the 128-bit vector.
6206 unsigned NumElems = VT.getVectorNumElements();
6207 unsigned IdxVal = cast<ConstantSDNode>(N2)->getZExtValue();
6208 bool Upper = IdxVal >= NumElems / 2;
6210 SDValue SubN0 = Extract128BitVector(N0, N2, DAG, dl);
6213 SDValue ScaledN2 = N2;
6215 ScaledN2 = DAG.getNode(ISD::SUB, dl, N2.getValueType(), N2,
6216 DAG.getConstant(NumElems /
6217 (VT.getSizeInBits() / 128),
6218 N2.getValueType()));
6219 Op = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, SubN0.getValueType(), SubN0,
6222 // Insert the 128-bit vector
6223 // FIXME: Why UNDEF?
6224 return Insert128BitVector(N0, Op, N2, DAG, dl);
6227 if (Subtarget->hasSSE41())
6228 return LowerINSERT_VECTOR_ELT_SSE4(Op, DAG);
6230 if (EltVT == MVT::i8)
6233 if (EltVT.getSizeInBits() == 16 && isa<ConstantSDNode>(N2)) {
6234 // Transform it so it match pinsrw which expects a 16-bit value in a GR32
6235 // as its second argument.
6236 if (N1.getValueType() != MVT::i32)
6237 N1 = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, N1);
6238 if (N2.getValueType() != MVT::i32)
6239 N2 = DAG.getIntPtrConstant(cast<ConstantSDNode>(N2)->getZExtValue());
6240 return DAG.getNode(X86ISD::PINSRW, dl, VT, N0, N1, N2);
6246 X86TargetLowering::LowerSCALAR_TO_VECTOR(SDValue Op, SelectionDAG &DAG) const {
6247 LLVMContext *Context = DAG.getContext();
6248 DebugLoc dl = Op.getDebugLoc();
6249 EVT OpVT = Op.getValueType();
6251 // If this is a 256-bit vector result, first insert into a 128-bit
6252 // vector and then insert into the 256-bit vector.
6253 if (OpVT.getSizeInBits() > 128) {
6254 // Insert into a 128-bit vector.
6255 EVT VT128 = EVT::getVectorVT(*Context,
6256 OpVT.getVectorElementType(),
6257 OpVT.getVectorNumElements() / 2);
6259 Op = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT128, Op.getOperand(0));
6261 // Insert the 128-bit vector.
6262 return Insert128BitVector(DAG.getNode(ISD::UNDEF, dl, OpVT), Op,
6263 DAG.getConstant(0, MVT::i32),
6267 if (Op.getValueType() == MVT::v1i64 &&
6268 Op.getOperand(0).getValueType() == MVT::i64)
6269 return DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v1i64, Op.getOperand(0));
6271 SDValue AnyExt = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, Op.getOperand(0));
6272 assert(Op.getValueType().getSimpleVT().getSizeInBits() == 128 &&
6273 "Expected an SSE type!");
6274 return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(),
6275 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32,AnyExt));
6278 // Lower a node with an EXTRACT_SUBVECTOR opcode. This may result in
6279 // a simple subregister reference or explicit instructions to grab
6280 // upper bits of a vector.
6282 X86TargetLowering::LowerEXTRACT_SUBVECTOR(SDValue Op, SelectionDAG &DAG) const {
6283 if (Subtarget->hasAVX()) {
6284 DebugLoc dl = Op.getNode()->getDebugLoc();
6285 SDValue Vec = Op.getNode()->getOperand(0);
6286 SDValue Idx = Op.getNode()->getOperand(1);
6288 if (Op.getNode()->getValueType(0).getSizeInBits() == 128
6289 && Vec.getNode()->getValueType(0).getSizeInBits() == 256) {
6290 return Extract128BitVector(Vec, Idx, DAG, dl);
6296 // Lower a node with an INSERT_SUBVECTOR opcode. This may result in a
6297 // simple superregister reference or explicit instructions to insert
6298 // the upper bits of a vector.
6300 X86TargetLowering::LowerINSERT_SUBVECTOR(SDValue Op, SelectionDAG &DAG) const {
6301 if (Subtarget->hasAVX()) {
6302 DebugLoc dl = Op.getNode()->getDebugLoc();
6303 SDValue Vec = Op.getNode()->getOperand(0);
6304 SDValue SubVec = Op.getNode()->getOperand(1);
6305 SDValue Idx = Op.getNode()->getOperand(2);
6307 if (Op.getNode()->getValueType(0).getSizeInBits() == 256
6308 && SubVec.getNode()->getValueType(0).getSizeInBits() == 128) {
6309 return Insert128BitVector(Vec, SubVec, Idx, DAG, dl);
6315 // ConstantPool, JumpTable, GlobalAddress, and ExternalSymbol are lowered as
6316 // their target countpart wrapped in the X86ISD::Wrapper node. Suppose N is
6317 // one of the above mentioned nodes. It has to be wrapped because otherwise
6318 // Select(N) returns N. So the raw TargetGlobalAddress nodes, etc. can only
6319 // be used to form addressing mode. These wrapped nodes will be selected
6322 X86TargetLowering::LowerConstantPool(SDValue Op, SelectionDAG &DAG) const {
6323 ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
6325 // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
6327 unsigned char OpFlag = 0;
6328 unsigned WrapperKind = X86ISD::Wrapper;
6329 CodeModel::Model M = getTargetMachine().getCodeModel();
6331 if (Subtarget->isPICStyleRIPRel() &&
6332 (M == CodeModel::Small || M == CodeModel::Kernel))
6333 WrapperKind = X86ISD::WrapperRIP;
6334 else if (Subtarget->isPICStyleGOT())
6335 OpFlag = X86II::MO_GOTOFF;
6336 else if (Subtarget->isPICStyleStubPIC())
6337 OpFlag = X86II::MO_PIC_BASE_OFFSET;
6339 SDValue Result = DAG.getTargetConstantPool(CP->getConstVal(), getPointerTy(),
6341 CP->getOffset(), OpFlag);
6342 DebugLoc DL = CP->getDebugLoc();
6343 Result = DAG.getNode(WrapperKind, DL, getPointerTy(), Result);
6344 // With PIC, the address is actually $g + Offset.
6346 Result = DAG.getNode(ISD::ADD, DL, getPointerTy(),
6347 DAG.getNode(X86ISD::GlobalBaseReg,
6348 DebugLoc(), getPointerTy()),
6355 SDValue X86TargetLowering::LowerJumpTable(SDValue Op, SelectionDAG &DAG) const {
6356 JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
6358 // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
6360 unsigned char OpFlag = 0;
6361 unsigned WrapperKind = X86ISD::Wrapper;
6362 CodeModel::Model M = getTargetMachine().getCodeModel();
6364 if (Subtarget->isPICStyleRIPRel() &&
6365 (M == CodeModel::Small || M == CodeModel::Kernel))
6366 WrapperKind = X86ISD::WrapperRIP;
6367 else if (Subtarget->isPICStyleGOT())
6368 OpFlag = X86II::MO_GOTOFF;
6369 else if (Subtarget->isPICStyleStubPIC())
6370 OpFlag = X86II::MO_PIC_BASE_OFFSET;
6372 SDValue Result = DAG.getTargetJumpTable(JT->getIndex(), getPointerTy(),
6374 DebugLoc DL = JT->getDebugLoc();
6375 Result = DAG.getNode(WrapperKind, DL, getPointerTy(), Result);
6377 // With PIC, the address is actually $g + Offset.
6379 Result = DAG.getNode(ISD::ADD, DL, getPointerTy(),
6380 DAG.getNode(X86ISD::GlobalBaseReg,
6381 DebugLoc(), getPointerTy()),
6388 X86TargetLowering::LowerExternalSymbol(SDValue Op, SelectionDAG &DAG) const {
6389 const char *Sym = cast<ExternalSymbolSDNode>(Op)->getSymbol();
6391 // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
6393 unsigned char OpFlag = 0;
6394 unsigned WrapperKind = X86ISD::Wrapper;
6395 CodeModel::Model M = getTargetMachine().getCodeModel();
6397 if (Subtarget->isPICStyleRIPRel() &&
6398 (M == CodeModel::Small || M == CodeModel::Kernel))
6399 WrapperKind = X86ISD::WrapperRIP;
6400 else if (Subtarget->isPICStyleGOT())
6401 OpFlag = X86II::MO_GOTOFF;
6402 else if (Subtarget->isPICStyleStubPIC())
6403 OpFlag = X86II::MO_PIC_BASE_OFFSET;
6405 SDValue Result = DAG.getTargetExternalSymbol(Sym, getPointerTy(), OpFlag);
6407 DebugLoc DL = Op.getDebugLoc();
6408 Result = DAG.getNode(WrapperKind, DL, getPointerTy(), Result);
6411 // With PIC, the address is actually $g + Offset.
6412 if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
6413 !Subtarget->is64Bit()) {
6414 Result = DAG.getNode(ISD::ADD, DL, getPointerTy(),
6415 DAG.getNode(X86ISD::GlobalBaseReg,
6416 DebugLoc(), getPointerTy()),
6424 X86TargetLowering::LowerBlockAddress(SDValue Op, SelectionDAG &DAG) const {
6425 // Create the TargetBlockAddressAddress node.
6426 unsigned char OpFlags =
6427 Subtarget->ClassifyBlockAddressReference();
6428 CodeModel::Model M = getTargetMachine().getCodeModel();
6429 const BlockAddress *BA = cast<BlockAddressSDNode>(Op)->getBlockAddress();
6430 DebugLoc dl = Op.getDebugLoc();
6431 SDValue Result = DAG.getBlockAddress(BA, getPointerTy(),
6432 /*isTarget=*/true, OpFlags);
6434 if (Subtarget->isPICStyleRIPRel() &&
6435 (M == CodeModel::Small || M == CodeModel::Kernel))
6436 Result = DAG.getNode(X86ISD::WrapperRIP, dl, getPointerTy(), Result);
6438 Result = DAG.getNode(X86ISD::Wrapper, dl, getPointerTy(), Result);
6440 // With PIC, the address is actually $g + Offset.
6441 if (isGlobalRelativeToPICBase(OpFlags)) {
6442 Result = DAG.getNode(ISD::ADD, dl, getPointerTy(),
6443 DAG.getNode(X86ISD::GlobalBaseReg, dl, getPointerTy()),
6451 X86TargetLowering::LowerGlobalAddress(const GlobalValue *GV, DebugLoc dl,
6453 SelectionDAG &DAG) const {
6454 // Create the TargetGlobalAddress node, folding in the constant
6455 // offset if it is legal.
6456 unsigned char OpFlags =
6457 Subtarget->ClassifyGlobalReference(GV, getTargetMachine());
6458 CodeModel::Model M = getTargetMachine().getCodeModel();
6460 if (OpFlags == X86II::MO_NO_FLAG &&
6461 X86::isOffsetSuitableForCodeModel(Offset, M)) {
6462 // A direct static reference to a global.
6463 Result = DAG.getTargetGlobalAddress(GV, dl, getPointerTy(), Offset);
6466 Result = DAG.getTargetGlobalAddress(GV, dl, getPointerTy(), 0, OpFlags);
6469 if (Subtarget->isPICStyleRIPRel() &&
6470 (M == CodeModel::Small || M == CodeModel::Kernel))
6471 Result = DAG.getNode(X86ISD::WrapperRIP, dl, getPointerTy(), Result);
6473 Result = DAG.getNode(X86ISD::Wrapper, dl, getPointerTy(), Result);
6475 // With PIC, the address is actually $g + Offset.
6476 if (isGlobalRelativeToPICBase(OpFlags)) {
6477 Result = DAG.getNode(ISD::ADD, dl, getPointerTy(),
6478 DAG.getNode(X86ISD::GlobalBaseReg, dl, getPointerTy()),
6482 // For globals that require a load from a stub to get the address, emit the
6484 if (isGlobalStubReference(OpFlags))
6485 Result = DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(), Result,
6486 MachinePointerInfo::getGOT(), false, false, 0);
6488 // If there was a non-zero offset that we didn't fold, create an explicit
6491 Result = DAG.getNode(ISD::ADD, dl, getPointerTy(), Result,
6492 DAG.getConstant(Offset, getPointerTy()));
6498 X86TargetLowering::LowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const {
6499 const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
6500 int64_t Offset = cast<GlobalAddressSDNode>(Op)->getOffset();
6501 return LowerGlobalAddress(GV, Op.getDebugLoc(), Offset, DAG);
6505 GetTLSADDR(SelectionDAG &DAG, SDValue Chain, GlobalAddressSDNode *GA,
6506 SDValue *InFlag, const EVT PtrVT, unsigned ReturnReg,
6507 unsigned char OperandFlags) {
6508 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
6509 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
6510 DebugLoc dl = GA->getDebugLoc();
6511 SDValue TGA = DAG.getTargetGlobalAddress(GA->getGlobal(), dl,
6512 GA->getValueType(0),
6516 SDValue Ops[] = { Chain, TGA, *InFlag };
6517 Chain = DAG.getNode(X86ISD::TLSADDR, dl, NodeTys, Ops, 3);
6519 SDValue Ops[] = { Chain, TGA };
6520 Chain = DAG.getNode(X86ISD::TLSADDR, dl, NodeTys, Ops, 2);
6523 // TLSADDR will be codegen'ed as call. Inform MFI that function has calls.
6524 MFI->setAdjustsStack(true);
6526 SDValue Flag = Chain.getValue(1);
6527 return DAG.getCopyFromReg(Chain, dl, ReturnReg, PtrVT, Flag);
6530 // Lower ISD::GlobalTLSAddress using the "general dynamic" model, 32 bit
6532 LowerToTLSGeneralDynamicModel32(GlobalAddressSDNode *GA, SelectionDAG &DAG,
6535 DebugLoc dl = GA->getDebugLoc(); // ? function entry point might be better
6536 SDValue Chain = DAG.getCopyToReg(DAG.getEntryNode(), dl, X86::EBX,
6537 DAG.getNode(X86ISD::GlobalBaseReg,
6538 DebugLoc(), PtrVT), InFlag);
6539 InFlag = Chain.getValue(1);
6541 return GetTLSADDR(DAG, Chain, GA, &InFlag, PtrVT, X86::EAX, X86II::MO_TLSGD);
6544 // Lower ISD::GlobalTLSAddress using the "general dynamic" model, 64 bit
6546 LowerToTLSGeneralDynamicModel64(GlobalAddressSDNode *GA, SelectionDAG &DAG,
6548 return GetTLSADDR(DAG, DAG.getEntryNode(), GA, NULL, PtrVT,
6549 X86::RAX, X86II::MO_TLSGD);
6552 // Lower ISD::GlobalTLSAddress using the "initial exec" (for no-pic) or
6553 // "local exec" model.
6554 static SDValue LowerToTLSExecModel(GlobalAddressSDNode *GA, SelectionDAG &DAG,
6555 const EVT PtrVT, TLSModel::Model model,
6557 DebugLoc dl = GA->getDebugLoc();
6559 // Get the Thread Pointer, which is %gs:0 (32-bit) or %fs:0 (64-bit).
6560 Value *Ptr = Constant::getNullValue(Type::getInt8PtrTy(*DAG.getContext(),
6561 is64Bit ? 257 : 256));
6563 SDValue ThreadPointer = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(),
6564 DAG.getIntPtrConstant(0),
6565 MachinePointerInfo(Ptr), false, false, 0);
6567 unsigned char OperandFlags = 0;
6568 // Most TLS accesses are not RIP relative, even on x86-64. One exception is
6570 unsigned WrapperKind = X86ISD::Wrapper;
6571 if (model == TLSModel::LocalExec) {
6572 OperandFlags = is64Bit ? X86II::MO_TPOFF : X86II::MO_NTPOFF;
6573 } else if (is64Bit) {
6574 assert(model == TLSModel::InitialExec);
6575 OperandFlags = X86II::MO_GOTTPOFF;
6576 WrapperKind = X86ISD::WrapperRIP;
6578 assert(model == TLSModel::InitialExec);
6579 OperandFlags = X86II::MO_INDNTPOFF;
6582 // emit "addl x@ntpoff,%eax" (local exec) or "addl x@indntpoff,%eax" (initial
6584 SDValue TGA = DAG.getTargetGlobalAddress(GA->getGlobal(), dl,
6585 GA->getValueType(0),
6586 GA->getOffset(), OperandFlags);
6587 SDValue Offset = DAG.getNode(WrapperKind, dl, PtrVT, TGA);
6589 if (model == TLSModel::InitialExec)
6590 Offset = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), Offset,
6591 MachinePointerInfo::getGOT(), false, false, 0);
6593 // The address of the thread local variable is the add of the thread
6594 // pointer with the offset of the variable.
6595 return DAG.getNode(ISD::ADD, dl, PtrVT, ThreadPointer, Offset);
6599 X86TargetLowering::LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const {
6601 GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op);
6602 const GlobalValue *GV = GA->getGlobal();
6604 if (Subtarget->isTargetELF()) {
6605 // TODO: implement the "local dynamic" model
6606 // TODO: implement the "initial exec"model for pic executables
6608 // If GV is an alias then use the aliasee for determining
6609 // thread-localness.
6610 if (const GlobalAlias *GA = dyn_cast<GlobalAlias>(GV))
6611 GV = GA->resolveAliasedGlobal(false);
6613 TLSModel::Model model
6614 = getTLSModel(GV, getTargetMachine().getRelocationModel());
6617 case TLSModel::GeneralDynamic:
6618 case TLSModel::LocalDynamic: // not implemented
6619 if (Subtarget->is64Bit())
6620 return LowerToTLSGeneralDynamicModel64(GA, DAG, getPointerTy());
6621 return LowerToTLSGeneralDynamicModel32(GA, DAG, getPointerTy());
6623 case TLSModel::InitialExec:
6624 case TLSModel::LocalExec:
6625 return LowerToTLSExecModel(GA, DAG, getPointerTy(), model,
6626 Subtarget->is64Bit());
6628 } else if (Subtarget->isTargetDarwin()) {
6629 // Darwin only has one model of TLS. Lower to that.
6630 unsigned char OpFlag = 0;
6631 unsigned WrapperKind = Subtarget->isPICStyleRIPRel() ?
6632 X86ISD::WrapperRIP : X86ISD::Wrapper;
6634 // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
6636 bool PIC32 = (getTargetMachine().getRelocationModel() == Reloc::PIC_) &&
6637 !Subtarget->is64Bit();
6639 OpFlag = X86II::MO_TLVP_PIC_BASE;
6641 OpFlag = X86II::MO_TLVP;
6642 DebugLoc DL = Op.getDebugLoc();
6643 SDValue Result = DAG.getTargetGlobalAddress(GA->getGlobal(), DL,
6644 GA->getValueType(0),
6645 GA->getOffset(), OpFlag);
6646 SDValue Offset = DAG.getNode(WrapperKind, DL, getPointerTy(), Result);
6648 // With PIC32, the address is actually $g + Offset.
6650 Offset = DAG.getNode(ISD::ADD, DL, getPointerTy(),
6651 DAG.getNode(X86ISD::GlobalBaseReg,
6652 DebugLoc(), getPointerTy()),
6655 // Lowering the machine isd will make sure everything is in the right
6657 SDValue Chain = DAG.getEntryNode();
6658 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
6659 SDValue Args[] = { Chain, Offset };
6660 Chain = DAG.getNode(X86ISD::TLSCALL, DL, NodeTys, Args, 2);
6662 // TLSCALL will be codegen'ed as call. Inform MFI that function has calls.
6663 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
6664 MFI->setAdjustsStack(true);
6666 // And our return value (tls address) is in the standard call return value
6668 unsigned Reg = Subtarget->is64Bit() ? X86::RAX : X86::EAX;
6669 return DAG.getCopyFromReg(Chain, DL, Reg, getPointerTy());
6673 "TLS not implemented for this target.");
6675 llvm_unreachable("Unreachable");
6680 /// LowerShiftParts - Lower SRA_PARTS and friends, which return two i32 values and
6681 /// take a 2 x i32 value to shift plus a shift amount.
6682 SDValue X86TargetLowering::LowerShiftParts(SDValue Op, SelectionDAG &DAG) const {
6683 assert(Op.getNumOperands() == 3 && "Not a double-shift!");
6684 EVT VT = Op.getValueType();
6685 unsigned VTBits = VT.getSizeInBits();
6686 DebugLoc dl = Op.getDebugLoc();
6687 bool isSRA = Op.getOpcode() == ISD::SRA_PARTS;
6688 SDValue ShOpLo = Op.getOperand(0);
6689 SDValue ShOpHi = Op.getOperand(1);
6690 SDValue ShAmt = Op.getOperand(2);
6691 SDValue Tmp1 = isSRA ? DAG.getNode(ISD::SRA, dl, VT, ShOpHi,
6692 DAG.getConstant(VTBits - 1, MVT::i8))
6693 : DAG.getConstant(0, VT);
6696 if (Op.getOpcode() == ISD::SHL_PARTS) {
6697 Tmp2 = DAG.getNode(X86ISD::SHLD, dl, VT, ShOpHi, ShOpLo, ShAmt);
6698 Tmp3 = DAG.getNode(ISD::SHL, dl, VT, ShOpLo, ShAmt);
6700 Tmp2 = DAG.getNode(X86ISD::SHRD, dl, VT, ShOpLo, ShOpHi, ShAmt);
6701 Tmp3 = DAG.getNode(isSRA ? ISD::SRA : ISD::SRL, dl, VT, ShOpHi, ShAmt);
6704 SDValue AndNode = DAG.getNode(ISD::AND, dl, MVT::i8, ShAmt,
6705 DAG.getConstant(VTBits, MVT::i8));
6706 SDValue Cond = DAG.getNode(X86ISD::CMP, dl, MVT::i32,
6707 AndNode, DAG.getConstant(0, MVT::i8));
6710 SDValue CC = DAG.getConstant(X86::COND_NE, MVT::i8);
6711 SDValue Ops0[4] = { Tmp2, Tmp3, CC, Cond };
6712 SDValue Ops1[4] = { Tmp3, Tmp1, CC, Cond };
6714 if (Op.getOpcode() == ISD::SHL_PARTS) {
6715 Hi = DAG.getNode(X86ISD::CMOV, dl, VT, Ops0, 4);
6716 Lo = DAG.getNode(X86ISD::CMOV, dl, VT, Ops1, 4);
6718 Lo = DAG.getNode(X86ISD::CMOV, dl, VT, Ops0, 4);
6719 Hi = DAG.getNode(X86ISD::CMOV, dl, VT, Ops1, 4);
6722 SDValue Ops[2] = { Lo, Hi };
6723 return DAG.getMergeValues(Ops, 2, dl);
6726 SDValue X86TargetLowering::LowerSINT_TO_FP(SDValue Op,
6727 SelectionDAG &DAG) const {
6728 EVT SrcVT = Op.getOperand(0).getValueType();
6730 if (SrcVT.isVector())
6733 assert(SrcVT.getSimpleVT() <= MVT::i64 && SrcVT.getSimpleVT() >= MVT::i16 &&
6734 "Unknown SINT_TO_FP to lower!");
6736 // These are really Legal; return the operand so the caller accepts it as
6738 if (SrcVT == MVT::i32 && isScalarFPTypeInSSEReg(Op.getValueType()))
6740 if (SrcVT == MVT::i64 && isScalarFPTypeInSSEReg(Op.getValueType()) &&
6741 Subtarget->is64Bit()) {
6745 DebugLoc dl = Op.getDebugLoc();
6746 unsigned Size = SrcVT.getSizeInBits()/8;
6747 MachineFunction &MF = DAG.getMachineFunction();
6748 int SSFI = MF.getFrameInfo()->CreateStackObject(Size, Size, false);
6749 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
6750 SDValue Chain = DAG.getStore(DAG.getEntryNode(), dl, Op.getOperand(0),
6752 MachinePointerInfo::getFixedStack(SSFI),
6754 return BuildFILD(Op, SrcVT, Chain, StackSlot, DAG);
6757 SDValue X86TargetLowering::BuildFILD(SDValue Op, EVT SrcVT, SDValue Chain,
6759 SelectionDAG &DAG) const {
6761 DebugLoc DL = Op.getDebugLoc();
6763 bool useSSE = isScalarFPTypeInSSEReg(Op.getValueType());
6765 Tys = DAG.getVTList(MVT::f64, MVT::Other, MVT::Glue);
6767 Tys = DAG.getVTList(Op.getValueType(), MVT::Other);
6769 unsigned ByteSize = SrcVT.getSizeInBits()/8;
6771 FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(StackSlot);
6772 MachineMemOperand *MMO;
6774 int SSFI = FI->getIndex();
6776 DAG.getMachineFunction()
6777 .getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
6778 MachineMemOperand::MOLoad, ByteSize, ByteSize);
6780 MMO = cast<LoadSDNode>(StackSlot)->getMemOperand();
6781 StackSlot = StackSlot.getOperand(1);
6783 SDValue Ops[] = { Chain, StackSlot, DAG.getValueType(SrcVT) };
6784 SDValue Result = DAG.getMemIntrinsicNode(useSSE ? X86ISD::FILD_FLAG :
6786 Tys, Ops, array_lengthof(Ops),
6790 Chain = Result.getValue(1);
6791 SDValue InFlag = Result.getValue(2);
6793 // FIXME: Currently the FST is flagged to the FILD_FLAG. This
6794 // shouldn't be necessary except that RFP cannot be live across
6795 // multiple blocks. When stackifier is fixed, they can be uncoupled.
6796 MachineFunction &MF = DAG.getMachineFunction();
6797 unsigned SSFISize = Op.getValueType().getSizeInBits()/8;
6798 int SSFI = MF.getFrameInfo()->CreateStackObject(SSFISize, SSFISize, false);
6799 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
6800 Tys = DAG.getVTList(MVT::Other);
6802 Chain, Result, StackSlot, DAG.getValueType(Op.getValueType()), InFlag
6804 MachineMemOperand *MMO =
6805 DAG.getMachineFunction()
6806 .getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
6807 MachineMemOperand::MOStore, SSFISize, SSFISize);
6809 Chain = DAG.getMemIntrinsicNode(X86ISD::FST, DL, Tys,
6810 Ops, array_lengthof(Ops),
6811 Op.getValueType(), MMO);
6812 Result = DAG.getLoad(Op.getValueType(), DL, Chain, StackSlot,
6813 MachinePointerInfo::getFixedStack(SSFI),
6820 // LowerUINT_TO_FP_i64 - 64-bit unsigned integer to double expansion.
6821 SDValue X86TargetLowering::LowerUINT_TO_FP_i64(SDValue Op,
6822 SelectionDAG &DAG) const {
6823 // This algorithm is not obvious. Here it is in C code, more or less:
6825 double uint64_to_double( uint32_t hi, uint32_t lo ) {
6826 static const __m128i exp = { 0x4330000045300000ULL, 0 };
6827 static const __m128d bias = { 0x1.0p84, 0x1.0p52 };
6829 // Copy ints to xmm registers.
6830 __m128i xh = _mm_cvtsi32_si128( hi );
6831 __m128i xl = _mm_cvtsi32_si128( lo );
6833 // Combine into low half of a single xmm register.
6834 __m128i x = _mm_unpacklo_epi32( xh, xl );
6838 // Merge in appropriate exponents to give the integer bits the right
6840 x = _mm_unpacklo_epi32( x, exp );
6842 // Subtract away the biases to deal with the IEEE-754 double precision
6844 d = _mm_sub_pd( (__m128d) x, bias );
6846 // All conversions up to here are exact. The correctly rounded result is
6847 // calculated using the current rounding mode using the following
6849 d = _mm_add_sd( d, _mm_unpackhi_pd( d, d ) );
6850 _mm_store_sd( &sd, d ); // Because we are returning doubles in XMM, this
6851 // store doesn't really need to be here (except
6852 // maybe to zero the other double)
6857 DebugLoc dl = Op.getDebugLoc();
6858 LLVMContext *Context = DAG.getContext();
6860 // Build some magic constants.
6861 std::vector<Constant*> CV0;
6862 CV0.push_back(ConstantInt::get(*Context, APInt(32, 0x45300000)));
6863 CV0.push_back(ConstantInt::get(*Context, APInt(32, 0x43300000)));
6864 CV0.push_back(ConstantInt::get(*Context, APInt(32, 0)));
6865 CV0.push_back(ConstantInt::get(*Context, APInt(32, 0)));
6866 Constant *C0 = ConstantVector::get(CV0);
6867 SDValue CPIdx0 = DAG.getConstantPool(C0, getPointerTy(), 16);
6869 std::vector<Constant*> CV1;
6871 ConstantFP::get(*Context, APFloat(APInt(64, 0x4530000000000000ULL))));
6873 ConstantFP::get(*Context, APFloat(APInt(64, 0x4330000000000000ULL))));
6874 Constant *C1 = ConstantVector::get(CV1);
6875 SDValue CPIdx1 = DAG.getConstantPool(C1, getPointerTy(), 16);
6877 SDValue XR1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32,
6878 DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
6880 DAG.getIntPtrConstant(1)));
6881 SDValue XR2 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32,
6882 DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
6884 DAG.getIntPtrConstant(0)));
6885 SDValue Unpck1 = getUnpackl(DAG, dl, MVT::v4i32, XR1, XR2);
6886 SDValue CLod0 = DAG.getLoad(MVT::v4i32, dl, DAG.getEntryNode(), CPIdx0,
6887 MachinePointerInfo::getConstantPool(),
6889 SDValue Unpck2 = getUnpackl(DAG, dl, MVT::v4i32, Unpck1, CLod0);
6890 SDValue XR2F = DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, Unpck2);
6891 SDValue CLod1 = DAG.getLoad(MVT::v2f64, dl, CLod0.getValue(1), CPIdx1,
6892 MachinePointerInfo::getConstantPool(),
6894 SDValue Sub = DAG.getNode(ISD::FSUB, dl, MVT::v2f64, XR2F, CLod1);
6896 // Add the halves; easiest way is to swap them into another reg first.
6897 int ShufMask[2] = { 1, -1 };
6898 SDValue Shuf = DAG.getVectorShuffle(MVT::v2f64, dl, Sub,
6899 DAG.getUNDEF(MVT::v2f64), ShufMask);
6900 SDValue Add = DAG.getNode(ISD::FADD, dl, MVT::v2f64, Shuf, Sub);
6901 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Add,
6902 DAG.getIntPtrConstant(0));
6905 // LowerUINT_TO_FP_i32 - 32-bit unsigned integer to float expansion.
6906 SDValue X86TargetLowering::LowerUINT_TO_FP_i32(SDValue Op,
6907 SelectionDAG &DAG) const {
6908 DebugLoc dl = Op.getDebugLoc();
6909 // FP constant to bias correct the final result.
6910 SDValue Bias = DAG.getConstantFP(BitsToDouble(0x4330000000000000ULL),
6913 // Load the 32-bit value into an XMM register.
6914 SDValue Load = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32,
6915 DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
6917 DAG.getIntPtrConstant(0)));
6919 Load = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64,
6920 DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, Load),
6921 DAG.getIntPtrConstant(0));
6923 // Or the load with the bias.
6924 SDValue Or = DAG.getNode(ISD::OR, dl, MVT::v2i64,
6925 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64,
6926 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
6928 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64,
6929 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
6930 MVT::v2f64, Bias)));
6931 Or = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64,
6932 DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, Or),
6933 DAG.getIntPtrConstant(0));
6935 // Subtract the bias.
6936 SDValue Sub = DAG.getNode(ISD::FSUB, dl, MVT::f64, Or, Bias);
6938 // Handle final rounding.
6939 EVT DestVT = Op.getValueType();
6941 if (DestVT.bitsLT(MVT::f64)) {
6942 return DAG.getNode(ISD::FP_ROUND, dl, DestVT, Sub,
6943 DAG.getIntPtrConstant(0));
6944 } else if (DestVT.bitsGT(MVT::f64)) {
6945 return DAG.getNode(ISD::FP_EXTEND, dl, DestVT, Sub);
6948 // Handle final rounding.
6952 SDValue X86TargetLowering::LowerUINT_TO_FP(SDValue Op,
6953 SelectionDAG &DAG) const {
6954 SDValue N0 = Op.getOperand(0);
6955 DebugLoc dl = Op.getDebugLoc();
6957 // Since UINT_TO_FP is legal (it's marked custom), dag combiner won't
6958 // optimize it to a SINT_TO_FP when the sign bit is known zero. Perform
6959 // the optimization here.
6960 if (DAG.SignBitIsZero(N0))
6961 return DAG.getNode(ISD::SINT_TO_FP, dl, Op.getValueType(), N0);
6963 EVT SrcVT = N0.getValueType();
6964 EVT DstVT = Op.getValueType();
6965 if (SrcVT == MVT::i64 && DstVT == MVT::f64 && X86ScalarSSEf64)
6966 return LowerUINT_TO_FP_i64(Op, DAG);
6967 else if (SrcVT == MVT::i32 && X86ScalarSSEf64)
6968 return LowerUINT_TO_FP_i32(Op, DAG);
6970 // Make a 64-bit buffer, and use it to build an FILD.
6971 SDValue StackSlot = DAG.CreateStackTemporary(MVT::i64);
6972 if (SrcVT == MVT::i32) {
6973 SDValue WordOff = DAG.getConstant(4, getPointerTy());
6974 SDValue OffsetSlot = DAG.getNode(ISD::ADD, dl,
6975 getPointerTy(), StackSlot, WordOff);
6976 SDValue Store1 = DAG.getStore(DAG.getEntryNode(), dl, Op.getOperand(0),
6977 StackSlot, MachinePointerInfo(),
6979 SDValue Store2 = DAG.getStore(Store1, dl, DAG.getConstant(0, MVT::i32),
6980 OffsetSlot, MachinePointerInfo(),
6982 SDValue Fild = BuildFILD(Op, MVT::i64, Store2, StackSlot, DAG);
6986 assert(SrcVT == MVT::i64 && "Unexpected type in UINT_TO_FP");
6987 SDValue Store = DAG.getStore(DAG.getEntryNode(), dl, Op.getOperand(0),
6988 StackSlot, MachinePointerInfo(),
6990 // For i64 source, we need to add the appropriate power of 2 if the input
6991 // was negative. This is the same as the optimization in
6992 // DAGTypeLegalizer::ExpandIntOp_UNIT_TO_FP, and for it to be safe here,
6993 // we must be careful to do the computation in x87 extended precision, not
6994 // in SSE. (The generic code can't know it's OK to do this, or how to.)
6995 int SSFI = cast<FrameIndexSDNode>(StackSlot)->getIndex();
6996 MachineMemOperand *MMO =
6997 DAG.getMachineFunction()
6998 .getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
6999 MachineMemOperand::MOLoad, 8, 8);
7001 SDVTList Tys = DAG.getVTList(MVT::f80, MVT::Other);
7002 SDValue Ops[] = { Store, StackSlot, DAG.getValueType(MVT::i64) };
7003 SDValue Fild = DAG.getMemIntrinsicNode(X86ISD::FILD, dl, Tys, Ops, 3,
7006 APInt FF(32, 0x5F800000ULL);
7008 // Check whether the sign bit is set.
7009 SDValue SignSet = DAG.getSetCC(dl, getSetCCResultType(MVT::i64),
7010 Op.getOperand(0), DAG.getConstant(0, MVT::i64),
7013 // Build a 64 bit pair (0, FF) in the constant pool, with FF in the lo bits.
7014 SDValue FudgePtr = DAG.getConstantPool(
7015 ConstantInt::get(*DAG.getContext(), FF.zext(64)),
7018 // Get a pointer to FF if the sign bit was set, or to 0 otherwise.
7019 SDValue Zero = DAG.getIntPtrConstant(0);
7020 SDValue Four = DAG.getIntPtrConstant(4);
7021 SDValue Offset = DAG.getNode(ISD::SELECT, dl, Zero.getValueType(), SignSet,
7023 FudgePtr = DAG.getNode(ISD::ADD, dl, getPointerTy(), FudgePtr, Offset);
7025 // Load the value out, extending it from f32 to f80.
7026 // FIXME: Avoid the extend by constructing the right constant pool?
7027 SDValue Fudge = DAG.getExtLoad(ISD::EXTLOAD, dl, MVT::f80, DAG.getEntryNode(),
7028 FudgePtr, MachinePointerInfo::getConstantPool(),
7029 MVT::f32, false, false, 4);
7030 // Extend everything to 80 bits to force it to be done on x87.
7031 SDValue Add = DAG.getNode(ISD::FADD, dl, MVT::f80, Fild, Fudge);
7032 return DAG.getNode(ISD::FP_ROUND, dl, DstVT, Add, DAG.getIntPtrConstant(0));
7035 std::pair<SDValue,SDValue> X86TargetLowering::
7036 FP_TO_INTHelper(SDValue Op, SelectionDAG &DAG, bool IsSigned) const {
7037 DebugLoc DL = Op.getDebugLoc();
7039 EVT DstTy = Op.getValueType();
7042 assert(DstTy == MVT::i32 && "Unexpected FP_TO_UINT");
7046 assert(DstTy.getSimpleVT() <= MVT::i64 &&
7047 DstTy.getSimpleVT() >= MVT::i16 &&
7048 "Unknown FP_TO_SINT to lower!");
7050 // These are really Legal.
7051 if (DstTy == MVT::i32 &&
7052 isScalarFPTypeInSSEReg(Op.getOperand(0).getValueType()))
7053 return std::make_pair(SDValue(), SDValue());
7054 if (Subtarget->is64Bit() &&
7055 DstTy == MVT::i64 &&
7056 isScalarFPTypeInSSEReg(Op.getOperand(0).getValueType()))
7057 return std::make_pair(SDValue(), SDValue());
7059 // We lower FP->sint64 into FISTP64, followed by a load, all to a temporary
7061 MachineFunction &MF = DAG.getMachineFunction();
7062 unsigned MemSize = DstTy.getSizeInBits()/8;
7063 int SSFI = MF.getFrameInfo()->CreateStackObject(MemSize, MemSize, false);
7064 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
7069 switch (DstTy.getSimpleVT().SimpleTy) {
7070 default: llvm_unreachable("Invalid FP_TO_SINT to lower!");
7071 case MVT::i16: Opc = X86ISD::FP_TO_INT16_IN_MEM; break;
7072 case MVT::i32: Opc = X86ISD::FP_TO_INT32_IN_MEM; break;
7073 case MVT::i64: Opc = X86ISD::FP_TO_INT64_IN_MEM; break;
7076 SDValue Chain = DAG.getEntryNode();
7077 SDValue Value = Op.getOperand(0);
7078 EVT TheVT = Op.getOperand(0).getValueType();
7079 if (isScalarFPTypeInSSEReg(TheVT)) {
7080 assert(DstTy == MVT::i64 && "Invalid FP_TO_SINT to lower!");
7081 Chain = DAG.getStore(Chain, DL, Value, StackSlot,
7082 MachinePointerInfo::getFixedStack(SSFI),
7084 SDVTList Tys = DAG.getVTList(Op.getOperand(0).getValueType(), MVT::Other);
7086 Chain, StackSlot, DAG.getValueType(TheVT)
7089 MachineMemOperand *MMO =
7090 MF.getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
7091 MachineMemOperand::MOLoad, MemSize, MemSize);
7092 Value = DAG.getMemIntrinsicNode(X86ISD::FLD, DL, Tys, Ops, 3,
7094 Chain = Value.getValue(1);
7095 SSFI = MF.getFrameInfo()->CreateStackObject(MemSize, MemSize, false);
7096 StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
7099 MachineMemOperand *MMO =
7100 MF.getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
7101 MachineMemOperand::MOStore, MemSize, MemSize);
7103 // Build the FP_TO_INT*_IN_MEM
7104 SDValue Ops[] = { Chain, Value, StackSlot };
7105 SDValue FIST = DAG.getMemIntrinsicNode(Opc, DL, DAG.getVTList(MVT::Other),
7106 Ops, 3, DstTy, MMO);
7108 return std::make_pair(FIST, StackSlot);
7111 SDValue X86TargetLowering::LowerFP_TO_SINT(SDValue Op,
7112 SelectionDAG &DAG) const {
7113 if (Op.getValueType().isVector())
7116 std::pair<SDValue,SDValue> Vals = FP_TO_INTHelper(Op, DAG, true);
7117 SDValue FIST = Vals.first, StackSlot = Vals.second;
7118 // If FP_TO_INTHelper failed, the node is actually supposed to be Legal.
7119 if (FIST.getNode() == 0) return Op;
7122 return DAG.getLoad(Op.getValueType(), Op.getDebugLoc(),
7123 FIST, StackSlot, MachinePointerInfo(), false, false, 0);
7126 SDValue X86TargetLowering::LowerFP_TO_UINT(SDValue Op,
7127 SelectionDAG &DAG) const {
7128 std::pair<SDValue,SDValue> Vals = FP_TO_INTHelper(Op, DAG, false);
7129 SDValue FIST = Vals.first, StackSlot = Vals.second;
7130 assert(FIST.getNode() && "Unexpected failure");
7133 return DAG.getLoad(Op.getValueType(), Op.getDebugLoc(),
7134 FIST, StackSlot, MachinePointerInfo(), false, false, 0);
7137 SDValue X86TargetLowering::LowerFABS(SDValue Op,
7138 SelectionDAG &DAG) const {
7139 LLVMContext *Context = DAG.getContext();
7140 DebugLoc dl = Op.getDebugLoc();
7141 EVT VT = Op.getValueType();
7144 EltVT = VT.getVectorElementType();
7145 std::vector<Constant*> CV;
7146 if (EltVT == MVT::f64) {
7147 Constant *C = ConstantFP::get(*Context, APFloat(APInt(64, ~(1ULL << 63))));
7151 Constant *C = ConstantFP::get(*Context, APFloat(APInt(32, ~(1U << 31))));
7157 Constant *C = ConstantVector::get(CV);
7158 SDValue CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
7159 SDValue Mask = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
7160 MachinePointerInfo::getConstantPool(),
7162 return DAG.getNode(X86ISD::FAND, dl, VT, Op.getOperand(0), Mask);
7165 SDValue X86TargetLowering::LowerFNEG(SDValue Op, SelectionDAG &DAG) const {
7166 LLVMContext *Context = DAG.getContext();
7167 DebugLoc dl = Op.getDebugLoc();
7168 EVT VT = Op.getValueType();
7171 EltVT = VT.getVectorElementType();
7172 std::vector<Constant*> CV;
7173 if (EltVT == MVT::f64) {
7174 Constant *C = ConstantFP::get(*Context, APFloat(APInt(64, 1ULL << 63)));
7178 Constant *C = ConstantFP::get(*Context, APFloat(APInt(32, 1U << 31)));
7184 Constant *C = ConstantVector::get(CV);
7185 SDValue CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
7186 SDValue Mask = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
7187 MachinePointerInfo::getConstantPool(),
7189 if (VT.isVector()) {
7190 return DAG.getNode(ISD::BITCAST, dl, VT,
7191 DAG.getNode(ISD::XOR, dl, MVT::v2i64,
7192 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64,
7194 DAG.getNode(ISD::BITCAST, dl, MVT::v2i64, Mask)));
7196 return DAG.getNode(X86ISD::FXOR, dl, VT, Op.getOperand(0), Mask);
7200 SDValue X86TargetLowering::LowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) const {
7201 LLVMContext *Context = DAG.getContext();
7202 SDValue Op0 = Op.getOperand(0);
7203 SDValue Op1 = Op.getOperand(1);
7204 DebugLoc dl = Op.getDebugLoc();
7205 EVT VT = Op.getValueType();
7206 EVT SrcVT = Op1.getValueType();
7208 // If second operand is smaller, extend it first.
7209 if (SrcVT.bitsLT(VT)) {
7210 Op1 = DAG.getNode(ISD::FP_EXTEND, dl, VT, Op1);
7213 // And if it is bigger, shrink it first.
7214 if (SrcVT.bitsGT(VT)) {
7215 Op1 = DAG.getNode(ISD::FP_ROUND, dl, VT, Op1, DAG.getIntPtrConstant(1));
7219 // At this point the operands and the result should have the same
7220 // type, and that won't be f80 since that is not custom lowered.
7222 // First get the sign bit of second operand.
7223 std::vector<Constant*> CV;
7224 if (SrcVT == MVT::f64) {
7225 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(64, 1ULL << 63))));
7226 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(64, 0))));
7228 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 1U << 31))));
7229 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 0))));
7230 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 0))));
7231 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 0))));
7233 Constant *C = ConstantVector::get(CV);
7234 SDValue CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
7235 SDValue Mask1 = DAG.getLoad(SrcVT, dl, DAG.getEntryNode(), CPIdx,
7236 MachinePointerInfo::getConstantPool(),
7238 SDValue SignBit = DAG.getNode(X86ISD::FAND, dl, SrcVT, Op1, Mask1);
7240 // Shift sign bit right or left if the two operands have different types.
7241 if (SrcVT.bitsGT(VT)) {
7242 // Op0 is MVT::f32, Op1 is MVT::f64.
7243 SignBit = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2f64, SignBit);
7244 SignBit = DAG.getNode(X86ISD::FSRL, dl, MVT::v2f64, SignBit,
7245 DAG.getConstant(32, MVT::i32));
7246 SignBit = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, SignBit);
7247 SignBit = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f32, SignBit,
7248 DAG.getIntPtrConstant(0));
7251 // Clear first operand sign bit.
7253 if (VT == MVT::f64) {
7254 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(64, ~(1ULL << 63)))));
7255 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(64, 0))));
7257 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, ~(1U << 31)))));
7258 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 0))));
7259 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 0))));
7260 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 0))));
7262 C = ConstantVector::get(CV);
7263 CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
7264 SDValue Mask2 = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
7265 MachinePointerInfo::getConstantPool(),
7267 SDValue Val = DAG.getNode(X86ISD::FAND, dl, VT, Op0, Mask2);
7269 // Or the value with the sign bit.
7270 return DAG.getNode(X86ISD::FOR, dl, VT, Val, SignBit);
7273 SDValue X86TargetLowering::LowerFGETSIGN(SDValue Op, SelectionDAG &DAG) const {
7274 SDValue N0 = Op.getOperand(0);
7275 DebugLoc dl = Op.getDebugLoc();
7276 EVT VT = Op.getValueType();
7278 // Lower ISD::FGETSIGN to (AND (X86ISD::FGETSIGNx86 ...) 1).
7279 SDValue xFGETSIGN = DAG.getNode(X86ISD::FGETSIGNx86, dl, VT, N0,
7280 DAG.getConstant(1, VT));
7281 return DAG.getNode(ISD::AND, dl, VT, xFGETSIGN, DAG.getConstant(1, VT));
7284 /// Emit nodes that will be selected as "test Op0,Op0", or something
7286 SDValue X86TargetLowering::EmitTest(SDValue Op, unsigned X86CC,
7287 SelectionDAG &DAG) const {
7288 DebugLoc dl = Op.getDebugLoc();
7290 // CF and OF aren't always set the way we want. Determine which
7291 // of these we need.
7292 bool NeedCF = false;
7293 bool NeedOF = false;
7296 case X86::COND_A: case X86::COND_AE:
7297 case X86::COND_B: case X86::COND_BE:
7300 case X86::COND_G: case X86::COND_GE:
7301 case X86::COND_L: case X86::COND_LE:
7302 case X86::COND_O: case X86::COND_NO:
7307 // See if we can use the EFLAGS value from the operand instead of
7308 // doing a separate TEST. TEST always sets OF and CF to 0, so unless
7309 // we prove that the arithmetic won't overflow, we can't use OF or CF.
7310 if (Op.getResNo() != 0 || NeedOF || NeedCF)
7311 // Emit a CMP with 0, which is the TEST pattern.
7312 return DAG.getNode(X86ISD::CMP, dl, MVT::i32, Op,
7313 DAG.getConstant(0, Op.getValueType()));
7315 unsigned Opcode = 0;
7316 unsigned NumOperands = 0;
7317 switch (Op.getNode()->getOpcode()) {
7319 // Due to an isel shortcoming, be conservative if this add is likely to be
7320 // selected as part of a load-modify-store instruction. When the root node
7321 // in a match is a store, isel doesn't know how to remap non-chain non-flag
7322 // uses of other nodes in the match, such as the ADD in this case. This
7323 // leads to the ADD being left around and reselected, with the result being
7324 // two adds in the output. Alas, even if none our users are stores, that
7325 // doesn't prove we're O.K. Ergo, if we have any parents that aren't
7326 // CopyToReg or SETCC, eschew INC/DEC. A better fix seems to require
7327 // climbing the DAG back to the root, and it doesn't seem to be worth the
7329 for (SDNode::use_iterator UI = Op.getNode()->use_begin(),
7330 UE = Op.getNode()->use_end(); UI != UE; ++UI)
7331 if (UI->getOpcode() != ISD::CopyToReg && UI->getOpcode() != ISD::SETCC)
7334 if (ConstantSDNode *C =
7335 dyn_cast<ConstantSDNode>(Op.getNode()->getOperand(1))) {
7336 // An add of one will be selected as an INC.
7337 if (C->getAPIntValue() == 1) {
7338 Opcode = X86ISD::INC;
7343 // An add of negative one (subtract of one) will be selected as a DEC.
7344 if (C->getAPIntValue().isAllOnesValue()) {
7345 Opcode = X86ISD::DEC;
7351 // Otherwise use a regular EFLAGS-setting add.
7352 Opcode = X86ISD::ADD;
7356 // If the primary and result isn't used, don't bother using X86ISD::AND,
7357 // because a TEST instruction will be better.
7358 bool NonFlagUse = false;
7359 for (SDNode::use_iterator UI = Op.getNode()->use_begin(),
7360 UE = Op.getNode()->use_end(); UI != UE; ++UI) {
7362 unsigned UOpNo = UI.getOperandNo();
7363 if (User->getOpcode() == ISD::TRUNCATE && User->hasOneUse()) {
7364 // Look pass truncate.
7365 UOpNo = User->use_begin().getOperandNo();
7366 User = *User->use_begin();
7369 if (User->getOpcode() != ISD::BRCOND &&
7370 User->getOpcode() != ISD::SETCC &&
7371 (User->getOpcode() != ISD::SELECT || UOpNo != 0)) {
7384 // Due to the ISEL shortcoming noted above, be conservative if this op is
7385 // likely to be selected as part of a load-modify-store instruction.
7386 for (SDNode::use_iterator UI = Op.getNode()->use_begin(),
7387 UE = Op.getNode()->use_end(); UI != UE; ++UI)
7388 if (UI->getOpcode() == ISD::STORE)
7391 // Otherwise use a regular EFLAGS-setting instruction.
7392 switch (Op.getNode()->getOpcode()) {
7393 default: llvm_unreachable("unexpected operator!");
7394 case ISD::SUB: Opcode = X86ISD::SUB; break;
7395 case ISD::OR: Opcode = X86ISD::OR; break;
7396 case ISD::XOR: Opcode = X86ISD::XOR; break;
7397 case ISD::AND: Opcode = X86ISD::AND; break;
7409 return SDValue(Op.getNode(), 1);
7416 // Emit a CMP with 0, which is the TEST pattern.
7417 return DAG.getNode(X86ISD::CMP, dl, MVT::i32, Op,
7418 DAG.getConstant(0, Op.getValueType()));
7420 SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::i32);
7421 SmallVector<SDValue, 4> Ops;
7422 for (unsigned i = 0; i != NumOperands; ++i)
7423 Ops.push_back(Op.getOperand(i));
7425 SDValue New = DAG.getNode(Opcode, dl, VTs, &Ops[0], NumOperands);
7426 DAG.ReplaceAllUsesWith(Op, New);
7427 return SDValue(New.getNode(), 1);
7430 /// Emit nodes that will be selected as "cmp Op0,Op1", or something
7432 SDValue X86TargetLowering::EmitCmp(SDValue Op0, SDValue Op1, unsigned X86CC,
7433 SelectionDAG &DAG) const {
7434 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op1))
7435 if (C->getAPIntValue() == 0)
7436 return EmitTest(Op0, X86CC, DAG);
7438 DebugLoc dl = Op0.getDebugLoc();
7439 return DAG.getNode(X86ISD::CMP, dl, MVT::i32, Op0, Op1);
7442 /// LowerToBT - Result of 'and' is compared against zero. Turn it into a BT node
7443 /// if it's possible.
7444 SDValue X86TargetLowering::LowerToBT(SDValue And, ISD::CondCode CC,
7445 DebugLoc dl, SelectionDAG &DAG) const {
7446 SDValue Op0 = And.getOperand(0);
7447 SDValue Op1 = And.getOperand(1);
7448 if (Op0.getOpcode() == ISD::TRUNCATE)
7449 Op0 = Op0.getOperand(0);
7450 if (Op1.getOpcode() == ISD::TRUNCATE)
7451 Op1 = Op1.getOperand(0);
7454 if (Op1.getOpcode() == ISD::SHL)
7455 std::swap(Op0, Op1);
7456 if (Op0.getOpcode() == ISD::SHL) {
7457 if (ConstantSDNode *And00C = dyn_cast<ConstantSDNode>(Op0.getOperand(0)))
7458 if (And00C->getZExtValue() == 1) {
7459 // If we looked past a truncate, check that it's only truncating away
7461 unsigned BitWidth = Op0.getValueSizeInBits();
7462 unsigned AndBitWidth = And.getValueSizeInBits();
7463 if (BitWidth > AndBitWidth) {
7464 APInt Mask = APInt::getAllOnesValue(BitWidth), Zeros, Ones;
7465 DAG.ComputeMaskedBits(Op0, Mask, Zeros, Ones);
7466 if (Zeros.countLeadingOnes() < BitWidth - AndBitWidth)
7470 RHS = Op0.getOperand(1);
7472 } else if (Op1.getOpcode() == ISD::Constant) {
7473 ConstantSDNode *AndRHS = cast<ConstantSDNode>(Op1);
7474 SDValue AndLHS = Op0;
7475 if (AndRHS->getZExtValue() == 1 && AndLHS.getOpcode() == ISD::SRL) {
7476 LHS = AndLHS.getOperand(0);
7477 RHS = AndLHS.getOperand(1);
7481 if (LHS.getNode()) {
7482 // If LHS is i8, promote it to i32 with any_extend. There is no i8 BT
7483 // instruction. Since the shift amount is in-range-or-undefined, we know
7484 // that doing a bittest on the i32 value is ok. We extend to i32 because
7485 // the encoding for the i16 version is larger than the i32 version.
7486 // Also promote i16 to i32 for performance / code size reason.
7487 if (LHS.getValueType() == MVT::i8 ||
7488 LHS.getValueType() == MVT::i16)
7489 LHS = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, LHS);
7491 // If the operand types disagree, extend the shift amount to match. Since
7492 // BT ignores high bits (like shifts) we can use anyextend.
7493 if (LHS.getValueType() != RHS.getValueType())
7494 RHS = DAG.getNode(ISD::ANY_EXTEND, dl, LHS.getValueType(), RHS);
7496 SDValue BT = DAG.getNode(X86ISD::BT, dl, MVT::i32, LHS, RHS);
7497 unsigned Cond = CC == ISD::SETEQ ? X86::COND_AE : X86::COND_B;
7498 return DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
7499 DAG.getConstant(Cond, MVT::i8), BT);
7505 SDValue X86TargetLowering::LowerSETCC(SDValue Op, SelectionDAG &DAG) const {
7506 assert(Op.getValueType() == MVT::i8 && "SetCC type must be 8-bit integer");
7507 SDValue Op0 = Op.getOperand(0);
7508 SDValue Op1 = Op.getOperand(1);
7509 DebugLoc dl = Op.getDebugLoc();
7510 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(2))->get();
7512 // Optimize to BT if possible.
7513 // Lower (X & (1 << N)) == 0 to BT(X, N).
7514 // Lower ((X >>u N) & 1) != 0 to BT(X, N).
7515 // Lower ((X >>s N) & 1) != 0 to BT(X, N).
7516 if (Op0.getOpcode() == ISD::AND && Op0.hasOneUse() &&
7517 Op1.getOpcode() == ISD::Constant &&
7518 cast<ConstantSDNode>(Op1)->isNullValue() &&
7519 (CC == ISD::SETEQ || CC == ISD::SETNE)) {
7520 SDValue NewSetCC = LowerToBT(Op0, CC, dl, DAG);
7521 if (NewSetCC.getNode())
7525 // Look for X == 0, X == 1, X != 0, or X != 1. We can simplify some forms of
7527 if (Op1.getOpcode() == ISD::Constant &&
7528 (cast<ConstantSDNode>(Op1)->getZExtValue() == 1 ||
7529 cast<ConstantSDNode>(Op1)->isNullValue()) &&
7530 (CC == ISD::SETEQ || CC == ISD::SETNE)) {
7532 // If the input is a setcc, then reuse the input setcc or use a new one with
7533 // the inverted condition.
7534 if (Op0.getOpcode() == X86ISD::SETCC) {
7535 X86::CondCode CCode = (X86::CondCode)Op0.getConstantOperandVal(0);
7536 bool Invert = (CC == ISD::SETNE) ^
7537 cast<ConstantSDNode>(Op1)->isNullValue();
7538 if (!Invert) return Op0;
7540 CCode = X86::GetOppositeBranchCondition(CCode);
7541 return DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
7542 DAG.getConstant(CCode, MVT::i8), Op0.getOperand(1));
7546 bool isFP = Op1.getValueType().isFloatingPoint();
7547 unsigned X86CC = TranslateX86CC(CC, isFP, Op0, Op1, DAG);
7548 if (X86CC == X86::COND_INVALID)
7551 SDValue EFLAGS = EmitCmp(Op0, Op1, X86CC, DAG);
7552 return DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
7553 DAG.getConstant(X86CC, MVT::i8), EFLAGS);
7556 SDValue X86TargetLowering::LowerVSETCC(SDValue Op, SelectionDAG &DAG) const {
7558 SDValue Op0 = Op.getOperand(0);
7559 SDValue Op1 = Op.getOperand(1);
7560 SDValue CC = Op.getOperand(2);
7561 EVT VT = Op.getValueType();
7562 ISD::CondCode SetCCOpcode = cast<CondCodeSDNode>(CC)->get();
7563 bool isFP = Op.getOperand(1).getValueType().isFloatingPoint();
7564 DebugLoc dl = Op.getDebugLoc();
7568 EVT VT0 = Op0.getValueType();
7569 assert(VT0 == MVT::v4f32 || VT0 == MVT::v2f64);
7570 unsigned Opc = VT0 == MVT::v4f32 ? X86ISD::CMPPS : X86ISD::CMPPD;
7573 switch (SetCCOpcode) {
7576 case ISD::SETEQ: SSECC = 0; break;
7578 case ISD::SETGT: Swap = true; // Fallthrough
7580 case ISD::SETOLT: SSECC = 1; break;
7582 case ISD::SETGE: Swap = true; // Fallthrough
7584 case ISD::SETOLE: SSECC = 2; break;
7585 case ISD::SETUO: SSECC = 3; break;
7587 case ISD::SETNE: SSECC = 4; break;
7588 case ISD::SETULE: Swap = true;
7589 case ISD::SETUGE: SSECC = 5; break;
7590 case ISD::SETULT: Swap = true;
7591 case ISD::SETUGT: SSECC = 6; break;
7592 case ISD::SETO: SSECC = 7; break;
7595 std::swap(Op0, Op1);
7597 // In the two special cases we can't handle, emit two comparisons.
7599 if (SetCCOpcode == ISD::SETUEQ) {
7601 UNORD = DAG.getNode(Opc, dl, VT, Op0, Op1, DAG.getConstant(3, MVT::i8));
7602 EQ = DAG.getNode(Opc, dl, VT, Op0, Op1, DAG.getConstant(0, MVT::i8));
7603 return DAG.getNode(ISD::OR, dl, VT, UNORD, EQ);
7605 else if (SetCCOpcode == ISD::SETONE) {
7607 ORD = DAG.getNode(Opc, dl, VT, Op0, Op1, DAG.getConstant(7, MVT::i8));
7608 NEQ = DAG.getNode(Opc, dl, VT, Op0, Op1, DAG.getConstant(4, MVT::i8));
7609 return DAG.getNode(ISD::AND, dl, VT, ORD, NEQ);
7611 llvm_unreachable("Illegal FP comparison");
7613 // Handle all other FP comparisons here.
7614 return DAG.getNode(Opc, dl, VT, Op0, Op1, DAG.getConstant(SSECC, MVT::i8));
7617 // We are handling one of the integer comparisons here. Since SSE only has
7618 // GT and EQ comparisons for integer, swapping operands and multiple
7619 // operations may be required for some comparisons.
7620 unsigned Opc = 0, EQOpc = 0, GTOpc = 0;
7621 bool Swap = false, Invert = false, FlipSigns = false;
7623 switch (VT.getSimpleVT().SimpleTy) {
7625 case MVT::v16i8: EQOpc = X86ISD::PCMPEQB; GTOpc = X86ISD::PCMPGTB; break;
7626 case MVT::v8i16: EQOpc = X86ISD::PCMPEQW; GTOpc = X86ISD::PCMPGTW; break;
7627 case MVT::v4i32: EQOpc = X86ISD::PCMPEQD; GTOpc = X86ISD::PCMPGTD; break;
7628 case MVT::v2i64: EQOpc = X86ISD::PCMPEQQ; GTOpc = X86ISD::PCMPGTQ; break;
7631 switch (SetCCOpcode) {
7633 case ISD::SETNE: Invert = true;
7634 case ISD::SETEQ: Opc = EQOpc; break;
7635 case ISD::SETLT: Swap = true;
7636 case ISD::SETGT: Opc = GTOpc; break;
7637 case ISD::SETGE: Swap = true;
7638 case ISD::SETLE: Opc = GTOpc; Invert = true; break;
7639 case ISD::SETULT: Swap = true;
7640 case ISD::SETUGT: Opc = GTOpc; FlipSigns = true; break;
7641 case ISD::SETUGE: Swap = true;
7642 case ISD::SETULE: Opc = GTOpc; FlipSigns = true; Invert = true; break;
7645 std::swap(Op0, Op1);
7647 // Since SSE has no unsigned integer comparisons, we need to flip the sign
7648 // bits of the inputs before performing those operations.
7650 EVT EltVT = VT.getVectorElementType();
7651 SDValue SignBit = DAG.getConstant(APInt::getSignBit(EltVT.getSizeInBits()),
7653 std::vector<SDValue> SignBits(VT.getVectorNumElements(), SignBit);
7654 SDValue SignVec = DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &SignBits[0],
7656 Op0 = DAG.getNode(ISD::XOR, dl, VT, Op0, SignVec);
7657 Op1 = DAG.getNode(ISD::XOR, dl, VT, Op1, SignVec);
7660 SDValue Result = DAG.getNode(Opc, dl, VT, Op0, Op1);
7662 // If the logical-not of the result is required, perform that now.
7664 Result = DAG.getNOT(dl, Result, VT);
7669 // isX86LogicalCmp - Return true if opcode is a X86 logical comparison.
7670 static bool isX86LogicalCmp(SDValue Op) {
7671 unsigned Opc = Op.getNode()->getOpcode();
7672 if (Opc == X86ISD::CMP || Opc == X86ISD::COMI || Opc == X86ISD::UCOMI)
7674 if (Op.getResNo() == 1 &&
7675 (Opc == X86ISD::ADD ||
7676 Opc == X86ISD::SUB ||
7677 Opc == X86ISD::ADC ||
7678 Opc == X86ISD::SBB ||
7679 Opc == X86ISD::SMUL ||
7680 Opc == X86ISD::UMUL ||
7681 Opc == X86ISD::INC ||
7682 Opc == X86ISD::DEC ||
7683 Opc == X86ISD::OR ||
7684 Opc == X86ISD::XOR ||
7685 Opc == X86ISD::AND))
7688 if (Op.getResNo() == 2 && Opc == X86ISD::UMUL)
7694 static bool isZero(SDValue V) {
7695 ConstantSDNode *C = dyn_cast<ConstantSDNode>(V);
7696 return C && C->isNullValue();
7699 static bool isAllOnes(SDValue V) {
7700 ConstantSDNode *C = dyn_cast<ConstantSDNode>(V);
7701 return C && C->isAllOnesValue();
7704 SDValue X86TargetLowering::LowerSELECT(SDValue Op, SelectionDAG &DAG) const {
7705 bool addTest = true;
7706 SDValue Cond = Op.getOperand(0);
7707 SDValue Op1 = Op.getOperand(1);
7708 SDValue Op2 = Op.getOperand(2);
7709 DebugLoc DL = Op.getDebugLoc();
7712 if (Cond.getOpcode() == ISD::SETCC) {
7713 SDValue NewCond = LowerSETCC(Cond, DAG);
7714 if (NewCond.getNode())
7718 // (select (x == 0), -1, y) -> (sign_bit (x - 1)) | y
7719 // (select (x == 0), y, -1) -> ~(sign_bit (x - 1)) | y
7720 // (select (x != 0), y, -1) -> (sign_bit (x - 1)) | y
7721 // (select (x != 0), -1, y) -> ~(sign_bit (x - 1)) | y
7722 if (Cond.getOpcode() == X86ISD::SETCC &&
7723 Cond.getOperand(1).getOpcode() == X86ISD::CMP &&
7724 isZero(Cond.getOperand(1).getOperand(1))) {
7725 SDValue Cmp = Cond.getOperand(1);
7727 unsigned CondCode =cast<ConstantSDNode>(Cond.getOperand(0))->getZExtValue();
7729 if ((isAllOnes(Op1) || isAllOnes(Op2)) &&
7730 (CondCode == X86::COND_E || CondCode == X86::COND_NE)) {
7731 SDValue Y = isAllOnes(Op2) ? Op1 : Op2;
7733 SDValue CmpOp0 = Cmp.getOperand(0);
7734 Cmp = DAG.getNode(X86ISD::CMP, DL, MVT::i32,
7735 CmpOp0, DAG.getConstant(1, CmpOp0.getValueType()));
7737 SDValue Res = // Res = 0 or -1.
7738 DAG.getNode(X86ISD::SETCC_CARRY, DL, Op.getValueType(),
7739 DAG.getConstant(X86::COND_B, MVT::i8), Cmp);
7741 if (isAllOnes(Op1) != (CondCode == X86::COND_E))
7742 Res = DAG.getNOT(DL, Res, Res.getValueType());
7744 ConstantSDNode *N2C = dyn_cast<ConstantSDNode>(Op2);
7745 if (N2C == 0 || !N2C->isNullValue())
7746 Res = DAG.getNode(ISD::OR, DL, Res.getValueType(), Res, Y);
7751 // Look past (and (setcc_carry (cmp ...)), 1).
7752 if (Cond.getOpcode() == ISD::AND &&
7753 Cond.getOperand(0).getOpcode() == X86ISD::SETCC_CARRY) {
7754 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Cond.getOperand(1));
7755 if (C && C->getAPIntValue() == 1)
7756 Cond = Cond.getOperand(0);
7759 // If condition flag is set by a X86ISD::CMP, then use it as the condition
7760 // setting operand in place of the X86ISD::SETCC.
7761 if (Cond.getOpcode() == X86ISD::SETCC ||
7762 Cond.getOpcode() == X86ISD::SETCC_CARRY) {
7763 CC = Cond.getOperand(0);
7765 SDValue Cmp = Cond.getOperand(1);
7766 unsigned Opc = Cmp.getOpcode();
7767 EVT VT = Op.getValueType();
7769 bool IllegalFPCMov = false;
7770 if (VT.isFloatingPoint() && !VT.isVector() &&
7771 !isScalarFPTypeInSSEReg(VT)) // FPStack?
7772 IllegalFPCMov = !hasFPCMov(cast<ConstantSDNode>(CC)->getSExtValue());
7774 if ((isX86LogicalCmp(Cmp) && !IllegalFPCMov) ||
7775 Opc == X86ISD::BT) { // FIXME
7782 // Look pass the truncate.
7783 if (Cond.getOpcode() == ISD::TRUNCATE)
7784 Cond = Cond.getOperand(0);
7786 // We know the result of AND is compared against zero. Try to match
7788 if (Cond.getOpcode() == ISD::AND && Cond.hasOneUse()) {
7789 SDValue NewSetCC = LowerToBT(Cond, ISD::SETNE, DL, DAG);
7790 if (NewSetCC.getNode()) {
7791 CC = NewSetCC.getOperand(0);
7792 Cond = NewSetCC.getOperand(1);
7799 CC = DAG.getConstant(X86::COND_NE, MVT::i8);
7800 Cond = EmitTest(Cond, X86::COND_NE, DAG);
7803 // a < b ? -1 : 0 -> RES = ~setcc_carry
7804 // a < b ? 0 : -1 -> RES = setcc_carry
7805 // a >= b ? -1 : 0 -> RES = setcc_carry
7806 // a >= b ? 0 : -1 -> RES = ~setcc_carry
7807 if (Cond.getOpcode() == X86ISD::CMP) {
7808 unsigned CondCode = cast<ConstantSDNode>(CC)->getZExtValue();
7810 if ((CondCode == X86::COND_AE || CondCode == X86::COND_B) &&
7811 (isAllOnes(Op1) || isAllOnes(Op2)) && (isZero(Op1) || isZero(Op2))) {
7812 SDValue Res = DAG.getNode(X86ISD::SETCC_CARRY, DL, Op.getValueType(),
7813 DAG.getConstant(X86::COND_B, MVT::i8), Cond);
7814 if (isAllOnes(Op1) != (CondCode == X86::COND_B))
7815 return DAG.getNOT(DL, Res, Res.getValueType());
7820 // X86ISD::CMOV means set the result (which is operand 1) to the RHS if
7821 // condition is true.
7822 SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::Glue);
7823 SDValue Ops[] = { Op2, Op1, CC, Cond };
7824 return DAG.getNode(X86ISD::CMOV, DL, VTs, Ops, array_lengthof(Ops));
7827 // isAndOrOfSingleUseSetCCs - Return true if node is an ISD::AND or
7828 // ISD::OR of two X86ISD::SETCC nodes each of which has no other use apart
7829 // from the AND / OR.
7830 static bool isAndOrOfSetCCs(SDValue Op, unsigned &Opc) {
7831 Opc = Op.getOpcode();
7832 if (Opc != ISD::OR && Opc != ISD::AND)
7834 return (Op.getOperand(0).getOpcode() == X86ISD::SETCC &&
7835 Op.getOperand(0).hasOneUse() &&
7836 Op.getOperand(1).getOpcode() == X86ISD::SETCC &&
7837 Op.getOperand(1).hasOneUse());
7840 // isXor1OfSetCC - Return true if node is an ISD::XOR of a X86ISD::SETCC and
7841 // 1 and that the SETCC node has a single use.
7842 static bool isXor1OfSetCC(SDValue Op) {
7843 if (Op.getOpcode() != ISD::XOR)
7845 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(Op.getOperand(1));
7846 if (N1C && N1C->getAPIntValue() == 1) {
7847 return Op.getOperand(0).getOpcode() == X86ISD::SETCC &&
7848 Op.getOperand(0).hasOneUse();
7853 SDValue X86TargetLowering::LowerBRCOND(SDValue Op, SelectionDAG &DAG) const {
7854 bool addTest = true;
7855 SDValue Chain = Op.getOperand(0);
7856 SDValue Cond = Op.getOperand(1);
7857 SDValue Dest = Op.getOperand(2);
7858 DebugLoc dl = Op.getDebugLoc();
7861 if (Cond.getOpcode() == ISD::SETCC) {
7862 SDValue NewCond = LowerSETCC(Cond, DAG);
7863 if (NewCond.getNode())
7867 // FIXME: LowerXALUO doesn't handle these!!
7868 else if (Cond.getOpcode() == X86ISD::ADD ||
7869 Cond.getOpcode() == X86ISD::SUB ||
7870 Cond.getOpcode() == X86ISD::SMUL ||
7871 Cond.getOpcode() == X86ISD::UMUL)
7872 Cond = LowerXALUO(Cond, DAG);
7875 // Look pass (and (setcc_carry (cmp ...)), 1).
7876 if (Cond.getOpcode() == ISD::AND &&
7877 Cond.getOperand(0).getOpcode() == X86ISD::SETCC_CARRY) {
7878 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Cond.getOperand(1));
7879 if (C && C->getAPIntValue() == 1)
7880 Cond = Cond.getOperand(0);
7883 // If condition flag is set by a X86ISD::CMP, then use it as the condition
7884 // setting operand in place of the X86ISD::SETCC.
7885 if (Cond.getOpcode() == X86ISD::SETCC ||
7886 Cond.getOpcode() == X86ISD::SETCC_CARRY) {
7887 CC = Cond.getOperand(0);
7889 SDValue Cmp = Cond.getOperand(1);
7890 unsigned Opc = Cmp.getOpcode();
7891 // FIXME: WHY THE SPECIAL CASING OF LogicalCmp??
7892 if (isX86LogicalCmp(Cmp) || Opc == X86ISD::BT) {
7896 switch (cast<ConstantSDNode>(CC)->getZExtValue()) {
7900 // These can only come from an arithmetic instruction with overflow,
7901 // e.g. SADDO, UADDO.
7902 Cond = Cond.getNode()->getOperand(1);
7909 if (Cond.hasOneUse() && isAndOrOfSetCCs(Cond, CondOpc)) {
7910 SDValue Cmp = Cond.getOperand(0).getOperand(1);
7911 if (CondOpc == ISD::OR) {
7912 // Also, recognize the pattern generated by an FCMP_UNE. We can emit
7913 // two branches instead of an explicit OR instruction with a
7915 if (Cmp == Cond.getOperand(1).getOperand(1) &&
7916 isX86LogicalCmp(Cmp)) {
7917 CC = Cond.getOperand(0).getOperand(0);
7918 Chain = DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
7919 Chain, Dest, CC, Cmp);
7920 CC = Cond.getOperand(1).getOperand(0);
7924 } else { // ISD::AND
7925 // Also, recognize the pattern generated by an FCMP_OEQ. We can emit
7926 // two branches instead of an explicit AND instruction with a
7927 // separate test. However, we only do this if this block doesn't
7928 // have a fall-through edge, because this requires an explicit
7929 // jmp when the condition is false.
7930 if (Cmp == Cond.getOperand(1).getOperand(1) &&
7931 isX86LogicalCmp(Cmp) &&
7932 Op.getNode()->hasOneUse()) {
7933 X86::CondCode CCode =
7934 (X86::CondCode)Cond.getOperand(0).getConstantOperandVal(0);
7935 CCode = X86::GetOppositeBranchCondition(CCode);
7936 CC = DAG.getConstant(CCode, MVT::i8);
7937 SDNode *User = *Op.getNode()->use_begin();
7938 // Look for an unconditional branch following this conditional branch.
7939 // We need this because we need to reverse the successors in order
7940 // to implement FCMP_OEQ.
7941 if (User->getOpcode() == ISD::BR) {
7942 SDValue FalseBB = User->getOperand(1);
7944 DAG.UpdateNodeOperands(User, User->getOperand(0), Dest);
7945 assert(NewBR == User);
7949 Chain = DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
7950 Chain, Dest, CC, Cmp);
7951 X86::CondCode CCode =
7952 (X86::CondCode)Cond.getOperand(1).getConstantOperandVal(0);
7953 CCode = X86::GetOppositeBranchCondition(CCode);
7954 CC = DAG.getConstant(CCode, MVT::i8);
7960 } else if (Cond.hasOneUse() && isXor1OfSetCC(Cond)) {
7961 // Recognize for xorb (setcc), 1 patterns. The xor inverts the condition.
7962 // It should be transformed during dag combiner except when the condition
7963 // is set by a arithmetics with overflow node.
7964 X86::CondCode CCode =
7965 (X86::CondCode)Cond.getOperand(0).getConstantOperandVal(0);
7966 CCode = X86::GetOppositeBranchCondition(CCode);
7967 CC = DAG.getConstant(CCode, MVT::i8);
7968 Cond = Cond.getOperand(0).getOperand(1);
7974 // Look pass the truncate.
7975 if (Cond.getOpcode() == ISD::TRUNCATE)
7976 Cond = Cond.getOperand(0);
7978 // We know the result of AND is compared against zero. Try to match
7980 if (Cond.getOpcode() == ISD::AND && Cond.hasOneUse()) {
7981 SDValue NewSetCC = LowerToBT(Cond, ISD::SETNE, dl, DAG);
7982 if (NewSetCC.getNode()) {
7983 CC = NewSetCC.getOperand(0);
7984 Cond = NewSetCC.getOperand(1);
7991 CC = DAG.getConstant(X86::COND_NE, MVT::i8);
7992 Cond = EmitTest(Cond, X86::COND_NE, DAG);
7994 return DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
7995 Chain, Dest, CC, Cond);
7999 // Lower dynamic stack allocation to _alloca call for Cygwin/Mingw targets.
8000 // Calls to _alloca is needed to probe the stack when allocating more than 4k
8001 // bytes in one go. Touching the stack at 4K increments is necessary to ensure
8002 // that the guard pages used by the OS virtual memory manager are allocated in
8003 // correct sequence.
8005 X86TargetLowering::LowerDYNAMIC_STACKALLOC(SDValue Op,
8006 SelectionDAG &DAG) const {
8007 assert((Subtarget->isTargetCygMing() || Subtarget->isTargetWindows()) &&
8008 "This should be used only on Windows targets");
8009 assert(!Subtarget->isTargetEnvMacho());
8010 DebugLoc dl = Op.getDebugLoc();
8013 SDValue Chain = Op.getOperand(0);
8014 SDValue Size = Op.getOperand(1);
8015 // FIXME: Ensure alignment here
8019 EVT SPTy = Subtarget->is64Bit() ? MVT::i64 : MVT::i32;
8020 unsigned Reg = (Subtarget->is64Bit() ? X86::RAX : X86::EAX);
8022 Chain = DAG.getCopyToReg(Chain, dl, Reg, Size, Flag);
8023 Flag = Chain.getValue(1);
8025 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
8027 Chain = DAG.getNode(X86ISD::WIN_ALLOCA, dl, NodeTys, Chain, Flag);
8028 Flag = Chain.getValue(1);
8030 Chain = DAG.getCopyFromReg(Chain, dl, X86StackPtr, SPTy).getValue(1);
8032 SDValue Ops1[2] = { Chain.getValue(0), Chain };
8033 return DAG.getMergeValues(Ops1, 2, dl);
8036 SDValue X86TargetLowering::LowerVASTART(SDValue Op, SelectionDAG &DAG) const {
8037 MachineFunction &MF = DAG.getMachineFunction();
8038 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
8040 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
8041 DebugLoc DL = Op.getDebugLoc();
8043 if (!Subtarget->is64Bit() || Subtarget->isTargetWin64()) {
8044 // vastart just stores the address of the VarArgsFrameIndex slot into the
8045 // memory location argument.
8046 SDValue FR = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(),
8048 return DAG.getStore(Op.getOperand(0), DL, FR, Op.getOperand(1),
8049 MachinePointerInfo(SV), false, false, 0);
8053 // gp_offset (0 - 6 * 8)
8054 // fp_offset (48 - 48 + 8 * 16)
8055 // overflow_arg_area (point to parameters coming in memory).
8057 SmallVector<SDValue, 8> MemOps;
8058 SDValue FIN = Op.getOperand(1);
8060 SDValue Store = DAG.getStore(Op.getOperand(0), DL,
8061 DAG.getConstant(FuncInfo->getVarArgsGPOffset(),
8063 FIN, MachinePointerInfo(SV), false, false, 0);
8064 MemOps.push_back(Store);
8067 FIN = DAG.getNode(ISD::ADD, DL, getPointerTy(),
8068 FIN, DAG.getIntPtrConstant(4));
8069 Store = DAG.getStore(Op.getOperand(0), DL,
8070 DAG.getConstant(FuncInfo->getVarArgsFPOffset(),
8072 FIN, MachinePointerInfo(SV, 4), false, false, 0);
8073 MemOps.push_back(Store);
8075 // Store ptr to overflow_arg_area
8076 FIN = DAG.getNode(ISD::ADD, DL, getPointerTy(),
8077 FIN, DAG.getIntPtrConstant(4));
8078 SDValue OVFIN = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(),
8080 Store = DAG.getStore(Op.getOperand(0), DL, OVFIN, FIN,
8081 MachinePointerInfo(SV, 8),
8083 MemOps.push_back(Store);
8085 // Store ptr to reg_save_area.
8086 FIN = DAG.getNode(ISD::ADD, DL, getPointerTy(),
8087 FIN, DAG.getIntPtrConstant(8));
8088 SDValue RSFIN = DAG.getFrameIndex(FuncInfo->getRegSaveFrameIndex(),
8090 Store = DAG.getStore(Op.getOperand(0), DL, RSFIN, FIN,
8091 MachinePointerInfo(SV, 16), false, false, 0);
8092 MemOps.push_back(Store);
8093 return DAG.getNode(ISD::TokenFactor, DL, MVT::Other,
8094 &MemOps[0], MemOps.size());
8097 SDValue X86TargetLowering::LowerVAARG(SDValue Op, SelectionDAG &DAG) const {
8098 assert(Subtarget->is64Bit() &&
8099 "LowerVAARG only handles 64-bit va_arg!");
8100 assert((Subtarget->isTargetLinux() ||
8101 Subtarget->isTargetDarwin()) &&
8102 "Unhandled target in LowerVAARG");
8103 assert(Op.getNode()->getNumOperands() == 4);
8104 SDValue Chain = Op.getOperand(0);
8105 SDValue SrcPtr = Op.getOperand(1);
8106 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
8107 unsigned Align = Op.getConstantOperandVal(3);
8108 DebugLoc dl = Op.getDebugLoc();
8110 EVT ArgVT = Op.getNode()->getValueType(0);
8111 const Type *ArgTy = ArgVT.getTypeForEVT(*DAG.getContext());
8112 uint32_t ArgSize = getTargetData()->getTypeAllocSize(ArgTy);
8115 // Decide which area this value should be read from.
8116 // TODO: Implement the AMD64 ABI in its entirety. This simple
8117 // selection mechanism works only for the basic types.
8118 if (ArgVT == MVT::f80) {
8119 llvm_unreachable("va_arg for f80 not yet implemented");
8120 } else if (ArgVT.isFloatingPoint() && ArgSize <= 16 /*bytes*/) {
8121 ArgMode = 2; // Argument passed in XMM register. Use fp_offset.
8122 } else if (ArgVT.isInteger() && ArgSize <= 32 /*bytes*/) {
8123 ArgMode = 1; // Argument passed in GPR64 register(s). Use gp_offset.
8125 llvm_unreachable("Unhandled argument type in LowerVAARG");
8129 // Sanity Check: Make sure using fp_offset makes sense.
8130 assert(!UseSoftFloat &&
8131 !(DAG.getMachineFunction()
8132 .getFunction()->hasFnAttr(Attribute::NoImplicitFloat)) &&
8133 Subtarget->hasXMM());
8136 // Insert VAARG_64 node into the DAG
8137 // VAARG_64 returns two values: Variable Argument Address, Chain
8138 SmallVector<SDValue, 11> InstOps;
8139 InstOps.push_back(Chain);
8140 InstOps.push_back(SrcPtr);
8141 InstOps.push_back(DAG.getConstant(ArgSize, MVT::i32));
8142 InstOps.push_back(DAG.getConstant(ArgMode, MVT::i8));
8143 InstOps.push_back(DAG.getConstant(Align, MVT::i32));
8144 SDVTList VTs = DAG.getVTList(getPointerTy(), MVT::Other);
8145 SDValue VAARG = DAG.getMemIntrinsicNode(X86ISD::VAARG_64, dl,
8146 VTs, &InstOps[0], InstOps.size(),
8148 MachinePointerInfo(SV),
8153 Chain = VAARG.getValue(1);
8155 // Load the next argument and return it
8156 return DAG.getLoad(ArgVT, dl,
8159 MachinePointerInfo(),
8163 SDValue X86TargetLowering::LowerVACOPY(SDValue Op, SelectionDAG &DAG) const {
8164 // X86-64 va_list is a struct { i32, i32, i8*, i8* }.
8165 assert(Subtarget->is64Bit() && "This code only handles 64-bit va_copy!");
8166 SDValue Chain = Op.getOperand(0);
8167 SDValue DstPtr = Op.getOperand(1);
8168 SDValue SrcPtr = Op.getOperand(2);
8169 const Value *DstSV = cast<SrcValueSDNode>(Op.getOperand(3))->getValue();
8170 const Value *SrcSV = cast<SrcValueSDNode>(Op.getOperand(4))->getValue();
8171 DebugLoc DL = Op.getDebugLoc();
8173 return DAG.getMemcpy(Chain, DL, DstPtr, SrcPtr,
8174 DAG.getIntPtrConstant(24), 8, /*isVolatile*/false,
8176 MachinePointerInfo(DstSV), MachinePointerInfo(SrcSV));
8180 X86TargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) const {
8181 DebugLoc dl = Op.getDebugLoc();
8182 unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
8184 default: return SDValue(); // Don't custom lower most intrinsics.
8185 // Comparison intrinsics.
8186 case Intrinsic::x86_sse_comieq_ss:
8187 case Intrinsic::x86_sse_comilt_ss:
8188 case Intrinsic::x86_sse_comile_ss:
8189 case Intrinsic::x86_sse_comigt_ss:
8190 case Intrinsic::x86_sse_comige_ss:
8191 case Intrinsic::x86_sse_comineq_ss:
8192 case Intrinsic::x86_sse_ucomieq_ss:
8193 case Intrinsic::x86_sse_ucomilt_ss:
8194 case Intrinsic::x86_sse_ucomile_ss:
8195 case Intrinsic::x86_sse_ucomigt_ss:
8196 case Intrinsic::x86_sse_ucomige_ss:
8197 case Intrinsic::x86_sse_ucomineq_ss:
8198 case Intrinsic::x86_sse2_comieq_sd:
8199 case Intrinsic::x86_sse2_comilt_sd:
8200 case Intrinsic::x86_sse2_comile_sd:
8201 case Intrinsic::x86_sse2_comigt_sd:
8202 case Intrinsic::x86_sse2_comige_sd:
8203 case Intrinsic::x86_sse2_comineq_sd:
8204 case Intrinsic::x86_sse2_ucomieq_sd:
8205 case Intrinsic::x86_sse2_ucomilt_sd:
8206 case Intrinsic::x86_sse2_ucomile_sd:
8207 case Intrinsic::x86_sse2_ucomigt_sd:
8208 case Intrinsic::x86_sse2_ucomige_sd:
8209 case Intrinsic::x86_sse2_ucomineq_sd: {
8211 ISD::CondCode CC = ISD::SETCC_INVALID;
8214 case Intrinsic::x86_sse_comieq_ss:
8215 case Intrinsic::x86_sse2_comieq_sd:
8219 case Intrinsic::x86_sse_comilt_ss:
8220 case Intrinsic::x86_sse2_comilt_sd:
8224 case Intrinsic::x86_sse_comile_ss:
8225 case Intrinsic::x86_sse2_comile_sd:
8229 case Intrinsic::x86_sse_comigt_ss:
8230 case Intrinsic::x86_sse2_comigt_sd:
8234 case Intrinsic::x86_sse_comige_ss:
8235 case Intrinsic::x86_sse2_comige_sd:
8239 case Intrinsic::x86_sse_comineq_ss:
8240 case Intrinsic::x86_sse2_comineq_sd:
8244 case Intrinsic::x86_sse_ucomieq_ss:
8245 case Intrinsic::x86_sse2_ucomieq_sd:
8246 Opc = X86ISD::UCOMI;
8249 case Intrinsic::x86_sse_ucomilt_ss:
8250 case Intrinsic::x86_sse2_ucomilt_sd:
8251 Opc = X86ISD::UCOMI;
8254 case Intrinsic::x86_sse_ucomile_ss:
8255 case Intrinsic::x86_sse2_ucomile_sd:
8256 Opc = X86ISD::UCOMI;
8259 case Intrinsic::x86_sse_ucomigt_ss:
8260 case Intrinsic::x86_sse2_ucomigt_sd:
8261 Opc = X86ISD::UCOMI;
8264 case Intrinsic::x86_sse_ucomige_ss:
8265 case Intrinsic::x86_sse2_ucomige_sd:
8266 Opc = X86ISD::UCOMI;
8269 case Intrinsic::x86_sse_ucomineq_ss:
8270 case Intrinsic::x86_sse2_ucomineq_sd:
8271 Opc = X86ISD::UCOMI;
8276 SDValue LHS = Op.getOperand(1);
8277 SDValue RHS = Op.getOperand(2);
8278 unsigned X86CC = TranslateX86CC(CC, true, LHS, RHS, DAG);
8279 assert(X86CC != X86::COND_INVALID && "Unexpected illegal condition!");
8280 SDValue Cond = DAG.getNode(Opc, dl, MVT::i32, LHS, RHS);
8281 SDValue SetCC = DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
8282 DAG.getConstant(X86CC, MVT::i8), Cond);
8283 return DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, SetCC);
8285 // ptest and testp intrinsics. The intrinsic these come from are designed to
8286 // return an integer value, not just an instruction so lower it to the ptest
8287 // or testp pattern and a setcc for the result.
8288 case Intrinsic::x86_sse41_ptestz:
8289 case Intrinsic::x86_sse41_ptestc:
8290 case Intrinsic::x86_sse41_ptestnzc:
8291 case Intrinsic::x86_avx_ptestz_256:
8292 case Intrinsic::x86_avx_ptestc_256:
8293 case Intrinsic::x86_avx_ptestnzc_256:
8294 case Intrinsic::x86_avx_vtestz_ps:
8295 case Intrinsic::x86_avx_vtestc_ps:
8296 case Intrinsic::x86_avx_vtestnzc_ps:
8297 case Intrinsic::x86_avx_vtestz_pd:
8298 case Intrinsic::x86_avx_vtestc_pd:
8299 case Intrinsic::x86_avx_vtestnzc_pd:
8300 case Intrinsic::x86_avx_vtestz_ps_256:
8301 case Intrinsic::x86_avx_vtestc_ps_256:
8302 case Intrinsic::x86_avx_vtestnzc_ps_256:
8303 case Intrinsic::x86_avx_vtestz_pd_256:
8304 case Intrinsic::x86_avx_vtestc_pd_256:
8305 case Intrinsic::x86_avx_vtestnzc_pd_256: {
8306 bool IsTestPacked = false;
8309 default: llvm_unreachable("Bad fallthrough in Intrinsic lowering.");
8310 case Intrinsic::x86_avx_vtestz_ps:
8311 case Intrinsic::x86_avx_vtestz_pd:
8312 case Intrinsic::x86_avx_vtestz_ps_256:
8313 case Intrinsic::x86_avx_vtestz_pd_256:
8314 IsTestPacked = true; // Fallthrough
8315 case Intrinsic::x86_sse41_ptestz:
8316 case Intrinsic::x86_avx_ptestz_256:
8318 X86CC = X86::COND_E;
8320 case Intrinsic::x86_avx_vtestc_ps:
8321 case Intrinsic::x86_avx_vtestc_pd:
8322 case Intrinsic::x86_avx_vtestc_ps_256:
8323 case Intrinsic::x86_avx_vtestc_pd_256:
8324 IsTestPacked = true; // Fallthrough
8325 case Intrinsic::x86_sse41_ptestc:
8326 case Intrinsic::x86_avx_ptestc_256:
8328 X86CC = X86::COND_B;
8330 case Intrinsic::x86_avx_vtestnzc_ps:
8331 case Intrinsic::x86_avx_vtestnzc_pd:
8332 case Intrinsic::x86_avx_vtestnzc_ps_256:
8333 case Intrinsic::x86_avx_vtestnzc_pd_256:
8334 IsTestPacked = true; // Fallthrough
8335 case Intrinsic::x86_sse41_ptestnzc:
8336 case Intrinsic::x86_avx_ptestnzc_256:
8338 X86CC = X86::COND_A;
8342 SDValue LHS = Op.getOperand(1);
8343 SDValue RHS = Op.getOperand(2);
8344 unsigned TestOpc = IsTestPacked ? X86ISD::TESTP : X86ISD::PTEST;
8345 SDValue Test = DAG.getNode(TestOpc, dl, MVT::i32, LHS, RHS);
8346 SDValue CC = DAG.getConstant(X86CC, MVT::i8);
8347 SDValue SetCC = DAG.getNode(X86ISD::SETCC, dl, MVT::i8, CC, Test);
8348 return DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, SetCC);
8351 // Fix vector shift instructions where the last operand is a non-immediate
8353 case Intrinsic::x86_sse2_pslli_w:
8354 case Intrinsic::x86_sse2_pslli_d:
8355 case Intrinsic::x86_sse2_pslli_q:
8356 case Intrinsic::x86_sse2_psrli_w:
8357 case Intrinsic::x86_sse2_psrli_d:
8358 case Intrinsic::x86_sse2_psrli_q:
8359 case Intrinsic::x86_sse2_psrai_w:
8360 case Intrinsic::x86_sse2_psrai_d:
8361 case Intrinsic::x86_mmx_pslli_w:
8362 case Intrinsic::x86_mmx_pslli_d:
8363 case Intrinsic::x86_mmx_pslli_q:
8364 case Intrinsic::x86_mmx_psrli_w:
8365 case Intrinsic::x86_mmx_psrli_d:
8366 case Intrinsic::x86_mmx_psrli_q:
8367 case Intrinsic::x86_mmx_psrai_w:
8368 case Intrinsic::x86_mmx_psrai_d: {
8369 SDValue ShAmt = Op.getOperand(2);
8370 if (isa<ConstantSDNode>(ShAmt))
8373 unsigned NewIntNo = 0;
8374 EVT ShAmtVT = MVT::v4i32;
8376 case Intrinsic::x86_sse2_pslli_w:
8377 NewIntNo = Intrinsic::x86_sse2_psll_w;
8379 case Intrinsic::x86_sse2_pslli_d:
8380 NewIntNo = Intrinsic::x86_sse2_psll_d;
8382 case Intrinsic::x86_sse2_pslli_q:
8383 NewIntNo = Intrinsic::x86_sse2_psll_q;
8385 case Intrinsic::x86_sse2_psrli_w:
8386 NewIntNo = Intrinsic::x86_sse2_psrl_w;
8388 case Intrinsic::x86_sse2_psrli_d:
8389 NewIntNo = Intrinsic::x86_sse2_psrl_d;
8391 case Intrinsic::x86_sse2_psrli_q:
8392 NewIntNo = Intrinsic::x86_sse2_psrl_q;
8394 case Intrinsic::x86_sse2_psrai_w:
8395 NewIntNo = Intrinsic::x86_sse2_psra_w;
8397 case Intrinsic::x86_sse2_psrai_d:
8398 NewIntNo = Intrinsic::x86_sse2_psra_d;
8401 ShAmtVT = MVT::v2i32;
8403 case Intrinsic::x86_mmx_pslli_w:
8404 NewIntNo = Intrinsic::x86_mmx_psll_w;
8406 case Intrinsic::x86_mmx_pslli_d:
8407 NewIntNo = Intrinsic::x86_mmx_psll_d;
8409 case Intrinsic::x86_mmx_pslli_q:
8410 NewIntNo = Intrinsic::x86_mmx_psll_q;
8412 case Intrinsic::x86_mmx_psrli_w:
8413 NewIntNo = Intrinsic::x86_mmx_psrl_w;
8415 case Intrinsic::x86_mmx_psrli_d:
8416 NewIntNo = Intrinsic::x86_mmx_psrl_d;
8418 case Intrinsic::x86_mmx_psrli_q:
8419 NewIntNo = Intrinsic::x86_mmx_psrl_q;
8421 case Intrinsic::x86_mmx_psrai_w:
8422 NewIntNo = Intrinsic::x86_mmx_psra_w;
8424 case Intrinsic::x86_mmx_psrai_d:
8425 NewIntNo = Intrinsic::x86_mmx_psra_d;
8427 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
8433 // The vector shift intrinsics with scalars uses 32b shift amounts but
8434 // the sse2/mmx shift instructions reads 64 bits. Set the upper 32 bits
8438 ShOps[1] = DAG.getConstant(0, MVT::i32);
8439 if (ShAmtVT == MVT::v4i32) {
8440 ShOps[2] = DAG.getUNDEF(MVT::i32);
8441 ShOps[3] = DAG.getUNDEF(MVT::i32);
8442 ShAmt = DAG.getNode(ISD::BUILD_VECTOR, dl, ShAmtVT, &ShOps[0], 4);
8444 ShAmt = DAG.getNode(ISD::BUILD_VECTOR, dl, ShAmtVT, &ShOps[0], 2);
8445 // FIXME this must be lowered to get rid of the invalid type.
8448 EVT VT = Op.getValueType();
8449 ShAmt = DAG.getNode(ISD::BITCAST, dl, VT, ShAmt);
8450 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8451 DAG.getConstant(NewIntNo, MVT::i32),
8452 Op.getOperand(1), ShAmt);
8457 SDValue X86TargetLowering::LowerRETURNADDR(SDValue Op,
8458 SelectionDAG &DAG) const {
8459 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
8460 MFI->setReturnAddressIsTaken(true);
8462 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
8463 DebugLoc dl = Op.getDebugLoc();
8466 SDValue FrameAddr = LowerFRAMEADDR(Op, DAG);
8468 DAG.getConstant(TD->getPointerSize(),
8469 Subtarget->is64Bit() ? MVT::i64 : MVT::i32);
8470 return DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
8471 DAG.getNode(ISD::ADD, dl, getPointerTy(),
8473 MachinePointerInfo(), false, false, 0);
8476 // Just load the return address.
8477 SDValue RetAddrFI = getReturnAddressFrameIndex(DAG);
8478 return DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
8479 RetAddrFI, MachinePointerInfo(), false, false, 0);
8482 SDValue X86TargetLowering::LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const {
8483 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
8484 MFI->setFrameAddressIsTaken(true);
8486 EVT VT = Op.getValueType();
8487 DebugLoc dl = Op.getDebugLoc(); // FIXME probably not meaningful
8488 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
8489 unsigned FrameReg = Subtarget->is64Bit() ? X86::RBP : X86::EBP;
8490 SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, FrameReg, VT);
8492 FrameAddr = DAG.getLoad(VT, dl, DAG.getEntryNode(), FrameAddr,
8493 MachinePointerInfo(),
8498 SDValue X86TargetLowering::LowerFRAME_TO_ARGS_OFFSET(SDValue Op,
8499 SelectionDAG &DAG) const {
8500 return DAG.getIntPtrConstant(2*TD->getPointerSize());
8503 SDValue X86TargetLowering::LowerEH_RETURN(SDValue Op, SelectionDAG &DAG) const {
8504 MachineFunction &MF = DAG.getMachineFunction();
8505 SDValue Chain = Op.getOperand(0);
8506 SDValue Offset = Op.getOperand(1);
8507 SDValue Handler = Op.getOperand(2);
8508 DebugLoc dl = Op.getDebugLoc();
8510 SDValue Frame = DAG.getCopyFromReg(DAG.getEntryNode(), dl,
8511 Subtarget->is64Bit() ? X86::RBP : X86::EBP,
8513 unsigned StoreAddrReg = (Subtarget->is64Bit() ? X86::RCX : X86::ECX);
8515 SDValue StoreAddr = DAG.getNode(ISD::ADD, dl, getPointerTy(), Frame,
8516 DAG.getIntPtrConstant(TD->getPointerSize()));
8517 StoreAddr = DAG.getNode(ISD::ADD, dl, getPointerTy(), StoreAddr, Offset);
8518 Chain = DAG.getStore(Chain, dl, Handler, StoreAddr, MachinePointerInfo(),
8520 Chain = DAG.getCopyToReg(Chain, dl, StoreAddrReg, StoreAddr);
8521 MF.getRegInfo().addLiveOut(StoreAddrReg);
8523 return DAG.getNode(X86ISD::EH_RETURN, dl,
8525 Chain, DAG.getRegister(StoreAddrReg, getPointerTy()));
8528 SDValue X86TargetLowering::LowerTRAMPOLINE(SDValue Op,
8529 SelectionDAG &DAG) const {
8530 SDValue Root = Op.getOperand(0);
8531 SDValue Trmp = Op.getOperand(1); // trampoline
8532 SDValue FPtr = Op.getOperand(2); // nested function
8533 SDValue Nest = Op.getOperand(3); // 'nest' parameter value
8534 DebugLoc dl = Op.getDebugLoc();
8536 const Value *TrmpAddr = cast<SrcValueSDNode>(Op.getOperand(4))->getValue();
8538 if (Subtarget->is64Bit()) {
8539 SDValue OutChains[6];
8541 // Large code-model.
8542 const unsigned char JMP64r = 0xFF; // 64-bit jmp through register opcode.
8543 const unsigned char MOV64ri = 0xB8; // X86::MOV64ri opcode.
8545 const unsigned char N86R10 = RegInfo->getX86RegNum(X86::R10);
8546 const unsigned char N86R11 = RegInfo->getX86RegNum(X86::R11);
8548 const unsigned char REX_WB = 0x40 | 0x08 | 0x01; // REX prefix
8550 // Load the pointer to the nested function into R11.
8551 unsigned OpCode = ((MOV64ri | N86R11) << 8) | REX_WB; // movabsq r11
8552 SDValue Addr = Trmp;
8553 OutChains[0] = DAG.getStore(Root, dl, DAG.getConstant(OpCode, MVT::i16),
8554 Addr, MachinePointerInfo(TrmpAddr),
8557 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
8558 DAG.getConstant(2, MVT::i64));
8559 OutChains[1] = DAG.getStore(Root, dl, FPtr, Addr,
8560 MachinePointerInfo(TrmpAddr, 2),
8563 // Load the 'nest' parameter value into R10.
8564 // R10 is specified in X86CallingConv.td
8565 OpCode = ((MOV64ri | N86R10) << 8) | REX_WB; // movabsq r10
8566 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
8567 DAG.getConstant(10, MVT::i64));
8568 OutChains[2] = DAG.getStore(Root, dl, DAG.getConstant(OpCode, MVT::i16),
8569 Addr, MachinePointerInfo(TrmpAddr, 10),
8572 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
8573 DAG.getConstant(12, MVT::i64));
8574 OutChains[3] = DAG.getStore(Root, dl, Nest, Addr,
8575 MachinePointerInfo(TrmpAddr, 12),
8578 // Jump to the nested function.
8579 OpCode = (JMP64r << 8) | REX_WB; // jmpq *...
8580 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
8581 DAG.getConstant(20, MVT::i64));
8582 OutChains[4] = DAG.getStore(Root, dl, DAG.getConstant(OpCode, MVT::i16),
8583 Addr, MachinePointerInfo(TrmpAddr, 20),
8586 unsigned char ModRM = N86R11 | (4 << 3) | (3 << 6); // ...r11
8587 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
8588 DAG.getConstant(22, MVT::i64));
8589 OutChains[5] = DAG.getStore(Root, dl, DAG.getConstant(ModRM, MVT::i8), Addr,
8590 MachinePointerInfo(TrmpAddr, 22),
8594 { Trmp, DAG.getNode(ISD::TokenFactor, dl, MVT::Other, OutChains, 6) };
8595 return DAG.getMergeValues(Ops, 2, dl);
8597 const Function *Func =
8598 cast<Function>(cast<SrcValueSDNode>(Op.getOperand(5))->getValue());
8599 CallingConv::ID CC = Func->getCallingConv();
8604 llvm_unreachable("Unsupported calling convention");
8605 case CallingConv::C:
8606 case CallingConv::X86_StdCall: {
8607 // Pass 'nest' parameter in ECX.
8608 // Must be kept in sync with X86CallingConv.td
8611 // Check that ECX wasn't needed by an 'inreg' parameter.
8612 const FunctionType *FTy = Func->getFunctionType();
8613 const AttrListPtr &Attrs = Func->getAttributes();
8615 if (!Attrs.isEmpty() && !Func->isVarArg()) {
8616 unsigned InRegCount = 0;
8619 for (FunctionType::param_iterator I = FTy->param_begin(),
8620 E = FTy->param_end(); I != E; ++I, ++Idx)
8621 if (Attrs.paramHasAttr(Idx, Attribute::InReg))
8622 // FIXME: should only count parameters that are lowered to integers.
8623 InRegCount += (TD->getTypeSizeInBits(*I) + 31) / 32;
8625 if (InRegCount > 2) {
8626 report_fatal_error("Nest register in use - reduce number of inreg"
8632 case CallingConv::X86_FastCall:
8633 case CallingConv::X86_ThisCall:
8634 case CallingConv::Fast:
8635 // Pass 'nest' parameter in EAX.
8636 // Must be kept in sync with X86CallingConv.td
8641 SDValue OutChains[4];
8644 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
8645 DAG.getConstant(10, MVT::i32));
8646 Disp = DAG.getNode(ISD::SUB, dl, MVT::i32, FPtr, Addr);
8648 // This is storing the opcode for MOV32ri.
8649 const unsigned char MOV32ri = 0xB8; // X86::MOV32ri's opcode byte.
8650 const unsigned char N86Reg = RegInfo->getX86RegNum(NestReg);
8651 OutChains[0] = DAG.getStore(Root, dl,
8652 DAG.getConstant(MOV32ri|N86Reg, MVT::i8),
8653 Trmp, MachinePointerInfo(TrmpAddr),
8656 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
8657 DAG.getConstant(1, MVT::i32));
8658 OutChains[1] = DAG.getStore(Root, dl, Nest, Addr,
8659 MachinePointerInfo(TrmpAddr, 1),
8662 const unsigned char JMP = 0xE9; // jmp <32bit dst> opcode.
8663 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
8664 DAG.getConstant(5, MVT::i32));
8665 OutChains[2] = DAG.getStore(Root, dl, DAG.getConstant(JMP, MVT::i8), Addr,
8666 MachinePointerInfo(TrmpAddr, 5),
8669 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
8670 DAG.getConstant(6, MVT::i32));
8671 OutChains[3] = DAG.getStore(Root, dl, Disp, Addr,
8672 MachinePointerInfo(TrmpAddr, 6),
8676 { Trmp, DAG.getNode(ISD::TokenFactor, dl, MVT::Other, OutChains, 4) };
8677 return DAG.getMergeValues(Ops, 2, dl);
8681 SDValue X86TargetLowering::LowerFLT_ROUNDS_(SDValue Op,
8682 SelectionDAG &DAG) const {
8684 The rounding mode is in bits 11:10 of FPSR, and has the following
8691 FLT_ROUNDS, on the other hand, expects the following:
8698 To perform the conversion, we do:
8699 (((((FPSR & 0x800) >> 11) | ((FPSR & 0x400) >> 9)) + 1) & 3)
8702 MachineFunction &MF = DAG.getMachineFunction();
8703 const TargetMachine &TM = MF.getTarget();
8704 const TargetFrameLowering &TFI = *TM.getFrameLowering();
8705 unsigned StackAlignment = TFI.getStackAlignment();
8706 EVT VT = Op.getValueType();
8707 DebugLoc DL = Op.getDebugLoc();
8709 // Save FP Control Word to stack slot
8710 int SSFI = MF.getFrameInfo()->CreateStackObject(2, StackAlignment, false);
8711 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
8714 MachineMemOperand *MMO =
8715 MF.getMachineMemOperand(MachinePointerInfo::getFixedStack(SSFI),
8716 MachineMemOperand::MOStore, 2, 2);
8718 SDValue Ops[] = { DAG.getEntryNode(), StackSlot };
8719 SDValue Chain = DAG.getMemIntrinsicNode(X86ISD::FNSTCW16m, DL,
8720 DAG.getVTList(MVT::Other),
8721 Ops, 2, MVT::i16, MMO);
8723 // Load FP Control Word from stack slot
8724 SDValue CWD = DAG.getLoad(MVT::i16, DL, Chain, StackSlot,
8725 MachinePointerInfo(), false, false, 0);
8727 // Transform as necessary
8729 DAG.getNode(ISD::SRL, DL, MVT::i16,
8730 DAG.getNode(ISD::AND, DL, MVT::i16,
8731 CWD, DAG.getConstant(0x800, MVT::i16)),
8732 DAG.getConstant(11, MVT::i8));
8734 DAG.getNode(ISD::SRL, DL, MVT::i16,
8735 DAG.getNode(ISD::AND, DL, MVT::i16,
8736 CWD, DAG.getConstant(0x400, MVT::i16)),
8737 DAG.getConstant(9, MVT::i8));
8740 DAG.getNode(ISD::AND, DL, MVT::i16,
8741 DAG.getNode(ISD::ADD, DL, MVT::i16,
8742 DAG.getNode(ISD::OR, DL, MVT::i16, CWD1, CWD2),
8743 DAG.getConstant(1, MVT::i16)),
8744 DAG.getConstant(3, MVT::i16));
8747 return DAG.getNode((VT.getSizeInBits() < 16 ?
8748 ISD::TRUNCATE : ISD::ZERO_EXTEND), DL, VT, RetVal);
8751 SDValue X86TargetLowering::LowerCTLZ(SDValue Op, SelectionDAG &DAG) const {
8752 EVT VT = Op.getValueType();
8754 unsigned NumBits = VT.getSizeInBits();
8755 DebugLoc dl = Op.getDebugLoc();
8757 Op = Op.getOperand(0);
8758 if (VT == MVT::i8) {
8759 // Zero extend to i32 since there is not an i8 bsr.
8761 Op = DAG.getNode(ISD::ZERO_EXTEND, dl, OpVT, Op);
8764 // Issue a bsr (scan bits in reverse) which also sets EFLAGS.
8765 SDVTList VTs = DAG.getVTList(OpVT, MVT::i32);
8766 Op = DAG.getNode(X86ISD::BSR, dl, VTs, Op);
8768 // If src is zero (i.e. bsr sets ZF), returns NumBits.
8771 DAG.getConstant(NumBits+NumBits-1, OpVT),
8772 DAG.getConstant(X86::COND_E, MVT::i8),
8775 Op = DAG.getNode(X86ISD::CMOV, dl, OpVT, Ops, array_lengthof(Ops));
8777 // Finally xor with NumBits-1.
8778 Op = DAG.getNode(ISD::XOR, dl, OpVT, Op, DAG.getConstant(NumBits-1, OpVT));
8781 Op = DAG.getNode(ISD::TRUNCATE, dl, MVT::i8, Op);
8785 SDValue X86TargetLowering::LowerCTTZ(SDValue Op, SelectionDAG &DAG) const {
8786 EVT VT = Op.getValueType();
8788 unsigned NumBits = VT.getSizeInBits();
8789 DebugLoc dl = Op.getDebugLoc();
8791 Op = Op.getOperand(0);
8792 if (VT == MVT::i8) {
8794 Op = DAG.getNode(ISD::ZERO_EXTEND, dl, OpVT, Op);
8797 // Issue a bsf (scan bits forward) which also sets EFLAGS.
8798 SDVTList VTs = DAG.getVTList(OpVT, MVT::i32);
8799 Op = DAG.getNode(X86ISD::BSF, dl, VTs, Op);
8801 // If src is zero (i.e. bsf sets ZF), returns NumBits.
8804 DAG.getConstant(NumBits, OpVT),
8805 DAG.getConstant(X86::COND_E, MVT::i8),
8808 Op = DAG.getNode(X86ISD::CMOV, dl, OpVT, Ops, array_lengthof(Ops));
8811 Op = DAG.getNode(ISD::TRUNCATE, dl, MVT::i8, Op);
8815 SDValue X86TargetLowering::LowerMUL_V2I64(SDValue Op, SelectionDAG &DAG) const {
8816 EVT VT = Op.getValueType();
8817 assert(VT == MVT::v2i64 && "Only know how to lower V2I64 multiply");
8818 DebugLoc dl = Op.getDebugLoc();
8820 // ulong2 Ahi = __builtin_ia32_psrlqi128( a, 32);
8821 // ulong2 Bhi = __builtin_ia32_psrlqi128( b, 32);
8822 // ulong2 AloBlo = __builtin_ia32_pmuludq128( a, b );
8823 // ulong2 AloBhi = __builtin_ia32_pmuludq128( a, Bhi );
8824 // ulong2 AhiBlo = __builtin_ia32_pmuludq128( Ahi, b );
8826 // AloBhi = __builtin_ia32_psllqi128( AloBhi, 32 );
8827 // AhiBlo = __builtin_ia32_psllqi128( AhiBlo, 32 );
8828 // return AloBlo + AloBhi + AhiBlo;
8830 SDValue A = Op.getOperand(0);
8831 SDValue B = Op.getOperand(1);
8833 SDValue Ahi = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8834 DAG.getConstant(Intrinsic::x86_sse2_psrli_q, MVT::i32),
8835 A, DAG.getConstant(32, MVT::i32));
8836 SDValue Bhi = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8837 DAG.getConstant(Intrinsic::x86_sse2_psrli_q, MVT::i32),
8838 B, DAG.getConstant(32, MVT::i32));
8839 SDValue AloBlo = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8840 DAG.getConstant(Intrinsic::x86_sse2_pmulu_dq, MVT::i32),
8842 SDValue AloBhi = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8843 DAG.getConstant(Intrinsic::x86_sse2_pmulu_dq, MVT::i32),
8845 SDValue AhiBlo = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8846 DAG.getConstant(Intrinsic::x86_sse2_pmulu_dq, MVT::i32),
8848 AloBhi = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8849 DAG.getConstant(Intrinsic::x86_sse2_pslli_q, MVT::i32),
8850 AloBhi, DAG.getConstant(32, MVT::i32));
8851 AhiBlo = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8852 DAG.getConstant(Intrinsic::x86_sse2_pslli_q, MVT::i32),
8853 AhiBlo, DAG.getConstant(32, MVT::i32));
8854 SDValue Res = DAG.getNode(ISD::ADD, dl, VT, AloBlo, AloBhi);
8855 Res = DAG.getNode(ISD::ADD, dl, VT, Res, AhiBlo);
8859 SDValue X86TargetLowering::LowerShift(SDValue Op, SelectionDAG &DAG) const {
8861 EVT VT = Op.getValueType();
8862 DebugLoc dl = Op.getDebugLoc();
8863 SDValue R = Op.getOperand(0);
8864 SDValue Amt = Op.getOperand(1);
8866 LLVMContext *Context = DAG.getContext();
8869 if (!Subtarget->hasSSE2()) return SDValue();
8871 // Optimize shl/srl/sra with constant shift amount.
8872 if (isSplatVector(Amt.getNode())) {
8873 SDValue SclrAmt = Amt->getOperand(0);
8874 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(SclrAmt)) {
8875 uint64_t ShiftAmt = C->getZExtValue();
8877 if (VT == MVT::v2i64 && Op.getOpcode() == ISD::SHL)
8878 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8879 DAG.getConstant(Intrinsic::x86_sse2_pslli_q, MVT::i32),
8880 R, DAG.getConstant(ShiftAmt, MVT::i32));
8882 if (VT == MVT::v4i32 && Op.getOpcode() == ISD::SHL)
8883 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8884 DAG.getConstant(Intrinsic::x86_sse2_pslli_d, MVT::i32),
8885 R, DAG.getConstant(ShiftAmt, MVT::i32));
8887 if (VT == MVT::v8i16 && Op.getOpcode() == ISD::SHL)
8888 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8889 DAG.getConstant(Intrinsic::x86_sse2_pslli_w, MVT::i32),
8890 R, DAG.getConstant(ShiftAmt, MVT::i32));
8892 if (VT == MVT::v2i64 && Op.getOpcode() == ISD::SRL)
8893 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8894 DAG.getConstant(Intrinsic::x86_sse2_psrli_q, MVT::i32),
8895 R, DAG.getConstant(ShiftAmt, MVT::i32));
8897 if (VT == MVT::v4i32 && Op.getOpcode() == ISD::SRL)
8898 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8899 DAG.getConstant(Intrinsic::x86_sse2_psrli_d, MVT::i32),
8900 R, DAG.getConstant(ShiftAmt, MVT::i32));
8902 if (VT == MVT::v8i16 && Op.getOpcode() == ISD::SRL)
8903 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8904 DAG.getConstant(Intrinsic::x86_sse2_psrli_w, MVT::i32),
8905 R, DAG.getConstant(ShiftAmt, MVT::i32));
8907 if (VT == MVT::v4i32 && Op.getOpcode() == ISD::SRA)
8908 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8909 DAG.getConstant(Intrinsic::x86_sse2_psrai_d, MVT::i32),
8910 R, DAG.getConstant(ShiftAmt, MVT::i32));
8912 if (VT == MVT::v8i16 && Op.getOpcode() == ISD::SRA)
8913 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8914 DAG.getConstant(Intrinsic::x86_sse2_psrai_w, MVT::i32),
8915 R, DAG.getConstant(ShiftAmt, MVT::i32));
8919 // Lower SHL with variable shift amount.
8920 // Cannot lower SHL without SSE4.1 or later.
8921 if (!Subtarget->hasSSE41()) return SDValue();
8923 if (VT == MVT::v4i32 && Op->getOpcode() == ISD::SHL) {
8924 Op = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8925 DAG.getConstant(Intrinsic::x86_sse2_pslli_d, MVT::i32),
8926 Op.getOperand(1), DAG.getConstant(23, MVT::i32));
8928 ConstantInt *CI = ConstantInt::get(*Context, APInt(32, 0x3f800000U));
8930 std::vector<Constant*> CV(4, CI);
8931 Constant *C = ConstantVector::get(CV);
8932 SDValue CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
8933 SDValue Addend = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
8934 MachinePointerInfo::getConstantPool(),
8937 Op = DAG.getNode(ISD::ADD, dl, VT, Op, Addend);
8938 Op = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, Op);
8939 Op = DAG.getNode(ISD::FP_TO_SINT, dl, VT, Op);
8940 return DAG.getNode(ISD::MUL, dl, VT, Op, R);
8942 if (VT == MVT::v16i8 && Op->getOpcode() == ISD::SHL) {
8944 Op = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8945 DAG.getConstant(Intrinsic::x86_sse2_pslli_w, MVT::i32),
8946 Op.getOperand(1), DAG.getConstant(5, MVT::i32));
8948 ConstantInt *CM1 = ConstantInt::get(*Context, APInt(8, 15));
8949 ConstantInt *CM2 = ConstantInt::get(*Context, APInt(8, 63));
8951 std::vector<Constant*> CVM1(16, CM1);
8952 std::vector<Constant*> CVM2(16, CM2);
8953 Constant *C = ConstantVector::get(CVM1);
8954 SDValue CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
8955 SDValue M = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
8956 MachinePointerInfo::getConstantPool(),
8959 // r = pblendv(r, psllw(r & (char16)15, 4), a);
8960 M = DAG.getNode(ISD::AND, dl, VT, R, M);
8961 M = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8962 DAG.getConstant(Intrinsic::x86_sse2_pslli_w, MVT::i32), M,
8963 DAG.getConstant(4, MVT::i32));
8964 R = DAG.getNode(X86ISD::PBLENDVB, dl, VT, R, M, Op);
8966 Op = DAG.getNode(ISD::ADD, dl, VT, Op, Op);
8968 C = ConstantVector::get(CVM2);
8969 CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
8970 M = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
8971 MachinePointerInfo::getConstantPool(),
8974 // r = pblendv(r, psllw(r & (char16)63, 2), a);
8975 M = DAG.getNode(ISD::AND, dl, VT, R, M);
8976 M = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8977 DAG.getConstant(Intrinsic::x86_sse2_pslli_w, MVT::i32), M,
8978 DAG.getConstant(2, MVT::i32));
8979 R = DAG.getNode(X86ISD::PBLENDVB, dl, VT, R, M, Op);
8981 Op = DAG.getNode(ISD::ADD, dl, VT, Op, Op);
8983 // return pblendv(r, r+r, a);
8984 R = DAG.getNode(X86ISD::PBLENDVB, dl, VT,
8985 R, DAG.getNode(ISD::ADD, dl, VT, R, R), Op);
8991 SDValue X86TargetLowering::LowerXALUO(SDValue Op, SelectionDAG &DAG) const {
8992 // Lower the "add/sub/mul with overflow" instruction into a regular ins plus
8993 // a "setcc" instruction that checks the overflow flag. The "brcond" lowering
8994 // looks for this combo and may remove the "setcc" instruction if the "setcc"
8995 // has only one use.
8996 SDNode *N = Op.getNode();
8997 SDValue LHS = N->getOperand(0);
8998 SDValue RHS = N->getOperand(1);
8999 unsigned BaseOp = 0;
9001 DebugLoc DL = Op.getDebugLoc();
9002 switch (Op.getOpcode()) {
9003 default: llvm_unreachable("Unknown ovf instruction!");
9005 // A subtract of one will be selected as a INC. Note that INC doesn't
9006 // set CF, so we can't do this for UADDO.
9007 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(RHS))
9009 BaseOp = X86ISD::INC;
9013 BaseOp = X86ISD::ADD;
9017 BaseOp = X86ISD::ADD;
9021 // A subtract of one will be selected as a DEC. Note that DEC doesn't
9022 // set CF, so we can't do this for USUBO.
9023 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(RHS))
9025 BaseOp = X86ISD::DEC;
9029 BaseOp = X86ISD::SUB;
9033 BaseOp = X86ISD::SUB;
9037 BaseOp = X86ISD::SMUL;
9040 case ISD::UMULO: { // i64, i8 = umulo lhs, rhs --> i64, i64, i32 umul lhs,rhs
9041 SDVTList VTs = DAG.getVTList(N->getValueType(0), N->getValueType(0),
9043 SDValue Sum = DAG.getNode(X86ISD::UMUL, DL, VTs, LHS, RHS);
9046 DAG.getNode(X86ISD::SETCC, DL, MVT::i8,
9047 DAG.getConstant(X86::COND_O, MVT::i32),
9048 SDValue(Sum.getNode(), 2));
9050 DAG.ReplaceAllUsesOfValueWith(SDValue(N, 1), SetCC);
9055 // Also sets EFLAGS.
9056 SDVTList VTs = DAG.getVTList(N->getValueType(0), MVT::i32);
9057 SDValue Sum = DAG.getNode(BaseOp, DL, VTs, LHS, RHS);
9060 DAG.getNode(X86ISD::SETCC, DL, N->getValueType(1),
9061 DAG.getConstant(Cond, MVT::i32),
9062 SDValue(Sum.getNode(), 1));
9064 DAG.ReplaceAllUsesOfValueWith(SDValue(N, 1), SetCC);
9068 SDValue X86TargetLowering::LowerMEMBARRIER(SDValue Op, SelectionDAG &DAG) const{
9069 DebugLoc dl = Op.getDebugLoc();
9071 if (!Subtarget->hasSSE2()) {
9072 SDValue Chain = Op.getOperand(0);
9073 SDValue Zero = DAG.getConstant(0,
9074 Subtarget->is64Bit() ? MVT::i64 : MVT::i32);
9076 DAG.getRegister(X86::ESP, MVT::i32), // Base
9077 DAG.getTargetConstant(1, MVT::i8), // Scale
9078 DAG.getRegister(0, MVT::i32), // Index
9079 DAG.getTargetConstant(0, MVT::i32), // Disp
9080 DAG.getRegister(0, MVT::i32), // Segment.
9085 DAG.getMachineNode(X86::OR32mrLocked, dl, MVT::Other, Ops,
9086 array_lengthof(Ops));
9087 return SDValue(Res, 0);
9090 unsigned isDev = cast<ConstantSDNode>(Op.getOperand(5))->getZExtValue();
9092 return DAG.getNode(X86ISD::MEMBARRIER, dl, MVT::Other, Op.getOperand(0));
9094 unsigned Op1 = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
9095 unsigned Op2 = cast<ConstantSDNode>(Op.getOperand(2))->getZExtValue();
9096 unsigned Op3 = cast<ConstantSDNode>(Op.getOperand(3))->getZExtValue();
9097 unsigned Op4 = cast<ConstantSDNode>(Op.getOperand(4))->getZExtValue();
9099 // def : Pat<(membarrier (i8 0), (i8 0), (i8 0), (i8 1), (i8 1)), (SFENCE)>;
9100 if (!Op1 && !Op2 && !Op3 && Op4)
9101 return DAG.getNode(X86ISD::SFENCE, dl, MVT::Other, Op.getOperand(0));
9103 // def : Pat<(membarrier (i8 1), (i8 0), (i8 0), (i8 0), (i8 1)), (LFENCE)>;
9104 if (Op1 && !Op2 && !Op3 && !Op4)
9105 return DAG.getNode(X86ISD::LFENCE, dl, MVT::Other, Op.getOperand(0));
9107 // def : Pat<(membarrier (i8 imm), (i8 imm), (i8 imm), (i8 imm), (i8 1)),
9109 return DAG.getNode(X86ISD::MFENCE, dl, MVT::Other, Op.getOperand(0));
9112 SDValue X86TargetLowering::LowerCMP_SWAP(SDValue Op, SelectionDAG &DAG) const {
9113 EVT T = Op.getValueType();
9114 DebugLoc DL = Op.getDebugLoc();
9117 switch(T.getSimpleVT().SimpleTy) {
9119 assert(false && "Invalid value type!");
9120 case MVT::i8: Reg = X86::AL; size = 1; break;
9121 case MVT::i16: Reg = X86::AX; size = 2; break;
9122 case MVT::i32: Reg = X86::EAX; size = 4; break;
9124 assert(Subtarget->is64Bit() && "Node not type legal!");
9125 Reg = X86::RAX; size = 8;
9128 SDValue cpIn = DAG.getCopyToReg(Op.getOperand(0), DL, Reg,
9129 Op.getOperand(2), SDValue());
9130 SDValue Ops[] = { cpIn.getValue(0),
9133 DAG.getTargetConstant(size, MVT::i8),
9135 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Glue);
9136 MachineMemOperand *MMO = cast<AtomicSDNode>(Op)->getMemOperand();
9137 SDValue Result = DAG.getMemIntrinsicNode(X86ISD::LCMPXCHG_DAG, DL, Tys,
9140 DAG.getCopyFromReg(Result.getValue(0), DL, Reg, T, Result.getValue(1));
9144 SDValue X86TargetLowering::LowerREADCYCLECOUNTER(SDValue Op,
9145 SelectionDAG &DAG) const {
9146 assert(Subtarget->is64Bit() && "Result not type legalized?");
9147 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Glue);
9148 SDValue TheChain = Op.getOperand(0);
9149 DebugLoc dl = Op.getDebugLoc();
9150 SDValue rd = DAG.getNode(X86ISD::RDTSC_DAG, dl, Tys, &TheChain, 1);
9151 SDValue rax = DAG.getCopyFromReg(rd, dl, X86::RAX, MVT::i64, rd.getValue(1));
9152 SDValue rdx = DAG.getCopyFromReg(rax.getValue(1), dl, X86::RDX, MVT::i64,
9154 SDValue Tmp = DAG.getNode(ISD::SHL, dl, MVT::i64, rdx,
9155 DAG.getConstant(32, MVT::i8));
9157 DAG.getNode(ISD::OR, dl, MVT::i64, rax, Tmp),
9160 return DAG.getMergeValues(Ops, 2, dl);
9163 SDValue X86TargetLowering::LowerBITCAST(SDValue Op,
9164 SelectionDAG &DAG) const {
9165 EVT SrcVT = Op.getOperand(0).getValueType();
9166 EVT DstVT = Op.getValueType();
9167 assert(Subtarget->is64Bit() && !Subtarget->hasSSE2() &&
9168 Subtarget->hasMMX() && "Unexpected custom BITCAST");
9169 assert((DstVT == MVT::i64 ||
9170 (DstVT.isVector() && DstVT.getSizeInBits()==64)) &&
9171 "Unexpected custom BITCAST");
9172 // i64 <=> MMX conversions are Legal.
9173 if (SrcVT==MVT::i64 && DstVT.isVector())
9175 if (DstVT==MVT::i64 && SrcVT.isVector())
9177 // MMX <=> MMX conversions are Legal.
9178 if (SrcVT.isVector() && DstVT.isVector())
9180 // All other conversions need to be expanded.
9184 SDValue X86TargetLowering::LowerLOAD_SUB(SDValue Op, SelectionDAG &DAG) const {
9185 SDNode *Node = Op.getNode();
9186 DebugLoc dl = Node->getDebugLoc();
9187 EVT T = Node->getValueType(0);
9188 SDValue negOp = DAG.getNode(ISD::SUB, dl, T,
9189 DAG.getConstant(0, T), Node->getOperand(2));
9190 return DAG.getAtomic(ISD::ATOMIC_LOAD_ADD, dl,
9191 cast<AtomicSDNode>(Node)->getMemoryVT(),
9192 Node->getOperand(0),
9193 Node->getOperand(1), negOp,
9194 cast<AtomicSDNode>(Node)->getSrcValue(),
9195 cast<AtomicSDNode>(Node)->getAlignment());
9198 static SDValue LowerADDC_ADDE_SUBC_SUBE(SDValue Op, SelectionDAG &DAG) {
9199 EVT VT = Op.getNode()->getValueType(0);
9201 // Let legalize expand this if it isn't a legal type yet.
9202 if (!DAG.getTargetLoweringInfo().isTypeLegal(VT))
9205 SDVTList VTs = DAG.getVTList(VT, MVT::i32);
9208 bool ExtraOp = false;
9209 switch (Op.getOpcode()) {
9210 default: assert(0 && "Invalid code");
9211 case ISD::ADDC: Opc = X86ISD::ADD; break;
9212 case ISD::ADDE: Opc = X86ISD::ADC; ExtraOp = true; break;
9213 case ISD::SUBC: Opc = X86ISD::SUB; break;
9214 case ISD::SUBE: Opc = X86ISD::SBB; ExtraOp = true; break;
9218 return DAG.getNode(Opc, Op->getDebugLoc(), VTs, Op.getOperand(0),
9220 return DAG.getNode(Opc, Op->getDebugLoc(), VTs, Op.getOperand(0),
9221 Op.getOperand(1), Op.getOperand(2));
9224 /// LowerOperation - Provide custom lowering hooks for some operations.
9226 SDValue X86TargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const {
9227 switch (Op.getOpcode()) {
9228 default: llvm_unreachable("Should not custom lower this!");
9229 case ISD::MEMBARRIER: return LowerMEMBARRIER(Op,DAG);
9230 case ISD::ATOMIC_CMP_SWAP: return LowerCMP_SWAP(Op,DAG);
9231 case ISD::ATOMIC_LOAD_SUB: return LowerLOAD_SUB(Op,DAG);
9232 case ISD::BUILD_VECTOR: return LowerBUILD_VECTOR(Op, DAG);
9233 case ISD::CONCAT_VECTORS: return LowerCONCAT_VECTORS(Op, DAG);
9234 case ISD::VECTOR_SHUFFLE: return LowerVECTOR_SHUFFLE(Op, DAG);
9235 case ISD::EXTRACT_VECTOR_ELT: return LowerEXTRACT_VECTOR_ELT(Op, DAG);
9236 case ISD::INSERT_VECTOR_ELT: return LowerINSERT_VECTOR_ELT(Op, DAG);
9237 case ISD::EXTRACT_SUBVECTOR: return LowerEXTRACT_SUBVECTOR(Op, DAG);
9238 case ISD::INSERT_SUBVECTOR: return LowerINSERT_SUBVECTOR(Op, DAG);
9239 case ISD::SCALAR_TO_VECTOR: return LowerSCALAR_TO_VECTOR(Op, DAG);
9240 case ISD::ConstantPool: return LowerConstantPool(Op, DAG);
9241 case ISD::GlobalAddress: return LowerGlobalAddress(Op, DAG);
9242 case ISD::GlobalTLSAddress: return LowerGlobalTLSAddress(Op, DAG);
9243 case ISD::ExternalSymbol: return LowerExternalSymbol(Op, DAG);
9244 case ISD::BlockAddress: return LowerBlockAddress(Op, DAG);
9245 case ISD::SHL_PARTS:
9246 case ISD::SRA_PARTS:
9247 case ISD::SRL_PARTS: return LowerShiftParts(Op, DAG);
9248 case ISD::SINT_TO_FP: return LowerSINT_TO_FP(Op, DAG);
9249 case ISD::UINT_TO_FP: return LowerUINT_TO_FP(Op, DAG);
9250 case ISD::FP_TO_SINT: return LowerFP_TO_SINT(Op, DAG);
9251 case ISD::FP_TO_UINT: return LowerFP_TO_UINT(Op, DAG);
9252 case ISD::FABS: return LowerFABS(Op, DAG);
9253 case ISD::FNEG: return LowerFNEG(Op, DAG);
9254 case ISD::FCOPYSIGN: return LowerFCOPYSIGN(Op, DAG);
9255 case ISD::FGETSIGN: return LowerFGETSIGN(Op, DAG);
9256 case ISD::SETCC: return LowerSETCC(Op, DAG);
9257 case ISD::VSETCC: return LowerVSETCC(Op, DAG);
9258 case ISD::SELECT: return LowerSELECT(Op, DAG);
9259 case ISD::BRCOND: return LowerBRCOND(Op, DAG);
9260 case ISD::JumpTable: return LowerJumpTable(Op, DAG);
9261 case ISD::VASTART: return LowerVASTART(Op, DAG);
9262 case ISD::VAARG: return LowerVAARG(Op, DAG);
9263 case ISD::VACOPY: return LowerVACOPY(Op, DAG);
9264 case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG);
9265 case ISD::RETURNADDR: return LowerRETURNADDR(Op, DAG);
9266 case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
9267 case ISD::FRAME_TO_ARGS_OFFSET:
9268 return LowerFRAME_TO_ARGS_OFFSET(Op, DAG);
9269 case ISD::DYNAMIC_STACKALLOC: return LowerDYNAMIC_STACKALLOC(Op, DAG);
9270 case ISD::EH_RETURN: return LowerEH_RETURN(Op, DAG);
9271 case ISD::TRAMPOLINE: return LowerTRAMPOLINE(Op, DAG);
9272 case ISD::FLT_ROUNDS_: return LowerFLT_ROUNDS_(Op, DAG);
9273 case ISD::CTLZ: return LowerCTLZ(Op, DAG);
9274 case ISD::CTTZ: return LowerCTTZ(Op, DAG);
9275 case ISD::MUL: return LowerMUL_V2I64(Op, DAG);
9278 case ISD::SHL: return LowerShift(Op, DAG);
9284 case ISD::UMULO: return LowerXALUO(Op, DAG);
9285 case ISD::READCYCLECOUNTER: return LowerREADCYCLECOUNTER(Op, DAG);
9286 case ISD::BITCAST: return LowerBITCAST(Op, DAG);
9290 case ISD::SUBE: return LowerADDC_ADDE_SUBC_SUBE(Op, DAG);
9294 void X86TargetLowering::
9295 ReplaceATOMIC_BINARY_64(SDNode *Node, SmallVectorImpl<SDValue>&Results,
9296 SelectionDAG &DAG, unsigned NewOp) const {
9297 EVT T = Node->getValueType(0);
9298 DebugLoc dl = Node->getDebugLoc();
9299 assert (T == MVT::i64 && "Only know how to expand i64 atomics");
9301 SDValue Chain = Node->getOperand(0);
9302 SDValue In1 = Node->getOperand(1);
9303 SDValue In2L = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
9304 Node->getOperand(2), DAG.getIntPtrConstant(0));
9305 SDValue In2H = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
9306 Node->getOperand(2), DAG.getIntPtrConstant(1));
9307 SDValue Ops[] = { Chain, In1, In2L, In2H };
9308 SDVTList Tys = DAG.getVTList(MVT::i32, MVT::i32, MVT::Other);
9310 DAG.getMemIntrinsicNode(NewOp, dl, Tys, Ops, 4, MVT::i64,
9311 cast<MemSDNode>(Node)->getMemOperand());
9312 SDValue OpsF[] = { Result.getValue(0), Result.getValue(1)};
9313 Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, OpsF, 2));
9314 Results.push_back(Result.getValue(2));
9317 /// ReplaceNodeResults - Replace a node with an illegal result type
9318 /// with a new node built out of custom code.
9319 void X86TargetLowering::ReplaceNodeResults(SDNode *N,
9320 SmallVectorImpl<SDValue>&Results,
9321 SelectionDAG &DAG) const {
9322 DebugLoc dl = N->getDebugLoc();
9323 switch (N->getOpcode()) {
9325 assert(false && "Do not know how to custom type legalize this operation!");
9331 // We don't want to expand or promote these.
9333 case ISD::FP_TO_SINT: {
9334 std::pair<SDValue,SDValue> Vals =
9335 FP_TO_INTHelper(SDValue(N, 0), DAG, true);
9336 SDValue FIST = Vals.first, StackSlot = Vals.second;
9337 if (FIST.getNode() != 0) {
9338 EVT VT = N->getValueType(0);
9339 // Return a load from the stack slot.
9340 Results.push_back(DAG.getLoad(VT, dl, FIST, StackSlot,
9341 MachinePointerInfo(), false, false, 0));
9345 case ISD::READCYCLECOUNTER: {
9346 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Glue);
9347 SDValue TheChain = N->getOperand(0);
9348 SDValue rd = DAG.getNode(X86ISD::RDTSC_DAG, dl, Tys, &TheChain, 1);
9349 SDValue eax = DAG.getCopyFromReg(rd, dl, X86::EAX, MVT::i32,
9351 SDValue edx = DAG.getCopyFromReg(eax.getValue(1), dl, X86::EDX, MVT::i32,
9353 // Use a buildpair to merge the two 32-bit values into a 64-bit one.
9354 SDValue Ops[] = { eax, edx };
9355 Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Ops, 2));
9356 Results.push_back(edx.getValue(1));
9359 case ISD::ATOMIC_CMP_SWAP: {
9360 EVT T = N->getValueType(0);
9361 assert (T == MVT::i64 && "Only know how to expand i64 Cmp and Swap");
9362 SDValue cpInL, cpInH;
9363 cpInL = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(2),
9364 DAG.getConstant(0, MVT::i32));
9365 cpInH = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(2),
9366 DAG.getConstant(1, MVT::i32));
9367 cpInL = DAG.getCopyToReg(N->getOperand(0), dl, X86::EAX, cpInL, SDValue());
9368 cpInH = DAG.getCopyToReg(cpInL.getValue(0), dl, X86::EDX, cpInH,
9370 SDValue swapInL, swapInH;
9371 swapInL = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(3),
9372 DAG.getConstant(0, MVT::i32));
9373 swapInH = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(3),
9374 DAG.getConstant(1, MVT::i32));
9375 swapInL = DAG.getCopyToReg(cpInH.getValue(0), dl, X86::EBX, swapInL,
9377 swapInH = DAG.getCopyToReg(swapInL.getValue(0), dl, X86::ECX, swapInH,
9378 swapInL.getValue(1));
9379 SDValue Ops[] = { swapInH.getValue(0),
9381 swapInH.getValue(1) };
9382 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Glue);
9383 MachineMemOperand *MMO = cast<AtomicSDNode>(N)->getMemOperand();
9384 SDValue Result = DAG.getMemIntrinsicNode(X86ISD::LCMPXCHG8_DAG, dl, Tys,
9386 SDValue cpOutL = DAG.getCopyFromReg(Result.getValue(0), dl, X86::EAX,
9387 MVT::i32, Result.getValue(1));
9388 SDValue cpOutH = DAG.getCopyFromReg(cpOutL.getValue(1), dl, X86::EDX,
9389 MVT::i32, cpOutL.getValue(2));
9390 SDValue OpsF[] = { cpOutL.getValue(0), cpOutH.getValue(0)};
9391 Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, OpsF, 2));
9392 Results.push_back(cpOutH.getValue(1));
9395 case ISD::ATOMIC_LOAD_ADD:
9396 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMADD64_DAG);
9398 case ISD::ATOMIC_LOAD_AND:
9399 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMAND64_DAG);
9401 case ISD::ATOMIC_LOAD_NAND:
9402 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMNAND64_DAG);
9404 case ISD::ATOMIC_LOAD_OR:
9405 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMOR64_DAG);
9407 case ISD::ATOMIC_LOAD_SUB:
9408 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMSUB64_DAG);
9410 case ISD::ATOMIC_LOAD_XOR:
9411 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMXOR64_DAG);
9413 case ISD::ATOMIC_SWAP:
9414 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMSWAP64_DAG);
9419 const char *X86TargetLowering::getTargetNodeName(unsigned Opcode) const {
9421 default: return NULL;
9422 case X86ISD::BSF: return "X86ISD::BSF";
9423 case X86ISD::BSR: return "X86ISD::BSR";
9424 case X86ISD::SHLD: return "X86ISD::SHLD";
9425 case X86ISD::SHRD: return "X86ISD::SHRD";
9426 case X86ISD::FAND: return "X86ISD::FAND";
9427 case X86ISD::FOR: return "X86ISD::FOR";
9428 case X86ISD::FXOR: return "X86ISD::FXOR";
9429 case X86ISD::FSRL: return "X86ISD::FSRL";
9430 case X86ISD::FILD: return "X86ISD::FILD";
9431 case X86ISD::FILD_FLAG: return "X86ISD::FILD_FLAG";
9432 case X86ISD::FP_TO_INT16_IN_MEM: return "X86ISD::FP_TO_INT16_IN_MEM";
9433 case X86ISD::FP_TO_INT32_IN_MEM: return "X86ISD::FP_TO_INT32_IN_MEM";
9434 case X86ISD::FP_TO_INT64_IN_MEM: return "X86ISD::FP_TO_INT64_IN_MEM";
9435 case X86ISD::FLD: return "X86ISD::FLD";
9436 case X86ISD::FST: return "X86ISD::FST";
9437 case X86ISD::CALL: return "X86ISD::CALL";
9438 case X86ISD::RDTSC_DAG: return "X86ISD::RDTSC_DAG";
9439 case X86ISD::BT: return "X86ISD::BT";
9440 case X86ISD::CMP: return "X86ISD::CMP";
9441 case X86ISD::COMI: return "X86ISD::COMI";
9442 case X86ISD::UCOMI: return "X86ISD::UCOMI";
9443 case X86ISD::SETCC: return "X86ISD::SETCC";
9444 case X86ISD::SETCC_CARRY: return "X86ISD::SETCC_CARRY";
9445 case X86ISD::FSETCCsd: return "X86ISD::FSETCCsd";
9446 case X86ISD::FSETCCss: return "X86ISD::FSETCCss";
9447 case X86ISD::CMOV: return "X86ISD::CMOV";
9448 case X86ISD::BRCOND: return "X86ISD::BRCOND";
9449 case X86ISD::RET_FLAG: return "X86ISD::RET_FLAG";
9450 case X86ISD::REP_STOS: return "X86ISD::REP_STOS";
9451 case X86ISD::REP_MOVS: return "X86ISD::REP_MOVS";
9452 case X86ISD::GlobalBaseReg: return "X86ISD::GlobalBaseReg";
9453 case X86ISD::Wrapper: return "X86ISD::Wrapper";
9454 case X86ISD::WrapperRIP: return "X86ISD::WrapperRIP";
9455 case X86ISD::PEXTRB: return "X86ISD::PEXTRB";
9456 case X86ISD::PEXTRW: return "X86ISD::PEXTRW";
9457 case X86ISD::INSERTPS: return "X86ISD::INSERTPS";
9458 case X86ISD::PINSRB: return "X86ISD::PINSRB";
9459 case X86ISD::PINSRW: return "X86ISD::PINSRW";
9460 case X86ISD::PSHUFB: return "X86ISD::PSHUFB";
9461 case X86ISD::PANDN: return "X86ISD::PANDN";
9462 case X86ISD::PSIGNB: return "X86ISD::PSIGNB";
9463 case X86ISD::PSIGNW: return "X86ISD::PSIGNW";
9464 case X86ISD::PSIGND: return "X86ISD::PSIGND";
9465 case X86ISD::PBLENDVB: return "X86ISD::PBLENDVB";
9466 case X86ISD::FMAX: return "X86ISD::FMAX";
9467 case X86ISD::FMIN: return "X86ISD::FMIN";
9468 case X86ISD::FRSQRT: return "X86ISD::FRSQRT";
9469 case X86ISD::FRCP: return "X86ISD::FRCP";
9470 case X86ISD::TLSADDR: return "X86ISD::TLSADDR";
9471 case X86ISD::TLSCALL: return "X86ISD::TLSCALL";
9472 case X86ISD::EH_RETURN: return "X86ISD::EH_RETURN";
9473 case X86ISD::TC_RETURN: return "X86ISD::TC_RETURN";
9474 case X86ISD::FNSTCW16m: return "X86ISD::FNSTCW16m";
9475 case X86ISD::LCMPXCHG_DAG: return "X86ISD::LCMPXCHG_DAG";
9476 case X86ISD::LCMPXCHG8_DAG: return "X86ISD::LCMPXCHG8_DAG";
9477 case X86ISD::ATOMADD64_DAG: return "X86ISD::ATOMADD64_DAG";
9478 case X86ISD::ATOMSUB64_DAG: return "X86ISD::ATOMSUB64_DAG";
9479 case X86ISD::ATOMOR64_DAG: return "X86ISD::ATOMOR64_DAG";
9480 case X86ISD::ATOMXOR64_DAG: return "X86ISD::ATOMXOR64_DAG";
9481 case X86ISD::ATOMAND64_DAG: return "X86ISD::ATOMAND64_DAG";
9482 case X86ISD::ATOMNAND64_DAG: return "X86ISD::ATOMNAND64_DAG";
9483 case X86ISD::VZEXT_MOVL: return "X86ISD::VZEXT_MOVL";
9484 case X86ISD::VZEXT_LOAD: return "X86ISD::VZEXT_LOAD";
9485 case X86ISD::VSHL: return "X86ISD::VSHL";
9486 case X86ISD::VSRL: return "X86ISD::VSRL";
9487 case X86ISD::CMPPD: return "X86ISD::CMPPD";
9488 case X86ISD::CMPPS: return "X86ISD::CMPPS";
9489 case X86ISD::PCMPEQB: return "X86ISD::PCMPEQB";
9490 case X86ISD::PCMPEQW: return "X86ISD::PCMPEQW";
9491 case X86ISD::PCMPEQD: return "X86ISD::PCMPEQD";
9492 case X86ISD::PCMPEQQ: return "X86ISD::PCMPEQQ";
9493 case X86ISD::PCMPGTB: return "X86ISD::PCMPGTB";
9494 case X86ISD::PCMPGTW: return "X86ISD::PCMPGTW";
9495 case X86ISD::PCMPGTD: return "X86ISD::PCMPGTD";
9496 case X86ISD::PCMPGTQ: return "X86ISD::PCMPGTQ";
9497 case X86ISD::ADD: return "X86ISD::ADD";
9498 case X86ISD::SUB: return "X86ISD::SUB";
9499 case X86ISD::ADC: return "X86ISD::ADC";
9500 case X86ISD::SBB: return "X86ISD::SBB";
9501 case X86ISD::SMUL: return "X86ISD::SMUL";
9502 case X86ISD::UMUL: return "X86ISD::UMUL";
9503 case X86ISD::INC: return "X86ISD::INC";
9504 case X86ISD::DEC: return "X86ISD::DEC";
9505 case X86ISD::OR: return "X86ISD::OR";
9506 case X86ISD::XOR: return "X86ISD::XOR";
9507 case X86ISD::AND: return "X86ISD::AND";
9508 case X86ISD::MUL_IMM: return "X86ISD::MUL_IMM";
9509 case X86ISD::PTEST: return "X86ISD::PTEST";
9510 case X86ISD::TESTP: return "X86ISD::TESTP";
9511 case X86ISD::PALIGN: return "X86ISD::PALIGN";
9512 case X86ISD::PSHUFD: return "X86ISD::PSHUFD";
9513 case X86ISD::PSHUFHW: return "X86ISD::PSHUFHW";
9514 case X86ISD::PSHUFHW_LD: return "X86ISD::PSHUFHW_LD";
9515 case X86ISD::PSHUFLW: return "X86ISD::PSHUFLW";
9516 case X86ISD::PSHUFLW_LD: return "X86ISD::PSHUFLW_LD";
9517 case X86ISD::SHUFPS: return "X86ISD::SHUFPS";
9518 case X86ISD::SHUFPD: return "X86ISD::SHUFPD";
9519 case X86ISD::MOVLHPS: return "X86ISD::MOVLHPS";
9520 case X86ISD::MOVLHPD: return "X86ISD::MOVLHPD";
9521 case X86ISD::MOVHLPS: return "X86ISD::MOVHLPS";
9522 case X86ISD::MOVHLPD: return "X86ISD::MOVHLPD";
9523 case X86ISD::MOVLPS: return "X86ISD::MOVLPS";
9524 case X86ISD::MOVLPD: return "X86ISD::MOVLPD";
9525 case X86ISD::MOVDDUP: return "X86ISD::MOVDDUP";
9526 case X86ISD::MOVSHDUP: return "X86ISD::MOVSHDUP";
9527 case X86ISD::MOVSLDUP: return "X86ISD::MOVSLDUP";
9528 case X86ISD::MOVSHDUP_LD: return "X86ISD::MOVSHDUP_LD";
9529 case X86ISD::MOVSLDUP_LD: return "X86ISD::MOVSLDUP_LD";
9530 case X86ISD::MOVSD: return "X86ISD::MOVSD";
9531 case X86ISD::MOVSS: return "X86ISD::MOVSS";
9532 case X86ISD::UNPCKLPS: return "X86ISD::UNPCKLPS";
9533 case X86ISD::UNPCKLPD: return "X86ISD::UNPCKLPD";
9534 case X86ISD::VUNPCKLPS: return "X86ISD::VUNPCKLPS";
9535 case X86ISD::VUNPCKLPD: return "X86ISD::VUNPCKLPD";
9536 case X86ISD::VUNPCKLPSY: return "X86ISD::VUNPCKLPSY";
9537 case X86ISD::VUNPCKLPDY: return "X86ISD::VUNPCKLPDY";
9538 case X86ISD::UNPCKHPS: return "X86ISD::UNPCKHPS";
9539 case X86ISD::UNPCKHPD: return "X86ISD::UNPCKHPD";
9540 case X86ISD::PUNPCKLBW: return "X86ISD::PUNPCKLBW";
9541 case X86ISD::PUNPCKLWD: return "X86ISD::PUNPCKLWD";
9542 case X86ISD::PUNPCKLDQ: return "X86ISD::PUNPCKLDQ";
9543 case X86ISD::PUNPCKLQDQ: return "X86ISD::PUNPCKLQDQ";
9544 case X86ISD::PUNPCKHBW: return "X86ISD::PUNPCKHBW";
9545 case X86ISD::PUNPCKHWD: return "X86ISD::PUNPCKHWD";
9546 case X86ISD::PUNPCKHDQ: return "X86ISD::PUNPCKHDQ";
9547 case X86ISD::PUNPCKHQDQ: return "X86ISD::PUNPCKHQDQ";
9548 case X86ISD::VASTART_SAVE_XMM_REGS: return "X86ISD::VASTART_SAVE_XMM_REGS";
9549 case X86ISD::VAARG_64: return "X86ISD::VAARG_64";
9550 case X86ISD::WIN_ALLOCA: return "X86ISD::WIN_ALLOCA";
9554 // isLegalAddressingMode - Return true if the addressing mode represented
9555 // by AM is legal for this target, for a load/store of the specified type.
9556 bool X86TargetLowering::isLegalAddressingMode(const AddrMode &AM,
9557 const Type *Ty) const {
9558 // X86 supports extremely general addressing modes.
9559 CodeModel::Model M = getTargetMachine().getCodeModel();
9560 Reloc::Model R = getTargetMachine().getRelocationModel();
9562 // X86 allows a sign-extended 32-bit immediate field as a displacement.
9563 if (!X86::isOffsetSuitableForCodeModel(AM.BaseOffs, M, AM.BaseGV != NULL))
9568 Subtarget->ClassifyGlobalReference(AM.BaseGV, getTargetMachine());
9570 // If a reference to this global requires an extra load, we can't fold it.
9571 if (isGlobalStubReference(GVFlags))
9574 // If BaseGV requires a register for the PIC base, we cannot also have a
9575 // BaseReg specified.
9576 if (AM.HasBaseReg && isGlobalRelativeToPICBase(GVFlags))
9579 // If lower 4G is not available, then we must use rip-relative addressing.
9580 if ((M != CodeModel::Small || R != Reloc::Static) &&
9581 Subtarget->is64Bit() && (AM.BaseOffs || AM.Scale > 1))
9591 // These scales always work.
9596 // These scales are formed with basereg+scalereg. Only accept if there is
9601 default: // Other stuff never works.
9609 bool X86TargetLowering::isTruncateFree(const Type *Ty1, const Type *Ty2) const {
9610 if (!Ty1->isIntegerTy() || !Ty2->isIntegerTy())
9612 unsigned NumBits1 = Ty1->getPrimitiveSizeInBits();
9613 unsigned NumBits2 = Ty2->getPrimitiveSizeInBits();
9614 if (NumBits1 <= NumBits2)
9619 bool X86TargetLowering::isTruncateFree(EVT VT1, EVT VT2) const {
9620 if (!VT1.isInteger() || !VT2.isInteger())
9622 unsigned NumBits1 = VT1.getSizeInBits();
9623 unsigned NumBits2 = VT2.getSizeInBits();
9624 if (NumBits1 <= NumBits2)
9629 bool X86TargetLowering::isZExtFree(const Type *Ty1, const Type *Ty2) const {
9630 // x86-64 implicitly zero-extends 32-bit results in 64-bit registers.
9631 return Ty1->isIntegerTy(32) && Ty2->isIntegerTy(64) && Subtarget->is64Bit();
9634 bool X86TargetLowering::isZExtFree(EVT VT1, EVT VT2) const {
9635 // x86-64 implicitly zero-extends 32-bit results in 64-bit registers.
9636 return VT1 == MVT::i32 && VT2 == MVT::i64 && Subtarget->is64Bit();
9639 bool X86TargetLowering::isNarrowingProfitable(EVT VT1, EVT VT2) const {
9640 // i16 instructions are longer (0x66 prefix) and potentially slower.
9641 return !(VT1 == MVT::i32 && VT2 == MVT::i16);
9644 /// isShuffleMaskLegal - Targets can use this to indicate that they only
9645 /// support *some* VECTOR_SHUFFLE operations, those with specific masks.
9646 /// By default, if a target supports the VECTOR_SHUFFLE node, all mask values
9647 /// are assumed to be legal.
9649 X86TargetLowering::isShuffleMaskLegal(const SmallVectorImpl<int> &M,
9651 // Very little shuffling can be done for 64-bit vectors right now.
9652 if (VT.getSizeInBits() == 64)
9653 return isPALIGNRMask(M, VT, Subtarget->hasSSSE3());
9655 // FIXME: pshufb, blends, shifts.
9656 return (VT.getVectorNumElements() == 2 ||
9657 ShuffleVectorSDNode::isSplatMask(&M[0], VT) ||
9658 isMOVLMask(M, VT) ||
9659 isSHUFPMask(M, VT) ||
9660 isPSHUFDMask(M, VT) ||
9661 isPSHUFHWMask(M, VT) ||
9662 isPSHUFLWMask(M, VT) ||
9663 isPALIGNRMask(M, VT, Subtarget->hasSSSE3()) ||
9664 isUNPCKLMask(M, VT) ||
9665 isUNPCKHMask(M, VT) ||
9666 isUNPCKL_v_undef_Mask(M, VT) ||
9667 isUNPCKH_v_undef_Mask(M, VT));
9671 X86TargetLowering::isVectorClearMaskLegal(const SmallVectorImpl<int> &Mask,
9673 unsigned NumElts = VT.getVectorNumElements();
9674 // FIXME: This collection of masks seems suspect.
9677 if (NumElts == 4 && VT.getSizeInBits() == 128) {
9678 return (isMOVLMask(Mask, VT) ||
9679 isCommutedMOVLMask(Mask, VT, true) ||
9680 isSHUFPMask(Mask, VT) ||
9681 isCommutedSHUFPMask(Mask, VT));
9686 //===----------------------------------------------------------------------===//
9687 // X86 Scheduler Hooks
9688 //===----------------------------------------------------------------------===//
9690 // private utility function
9692 X86TargetLowering::EmitAtomicBitwiseWithCustomInserter(MachineInstr *bInstr,
9693 MachineBasicBlock *MBB,
9700 TargetRegisterClass *RC,
9701 bool invSrc) const {
9702 // For the atomic bitwise operator, we generate
9705 // ld t1 = [bitinstr.addr]
9706 // op t2 = t1, [bitinstr.val]
9708 // lcs dest = [bitinstr.addr], t2 [EAX is implicit]
9710 // fallthrough -->nextMBB
9711 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
9712 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
9713 MachineFunction::iterator MBBIter = MBB;
9716 /// First build the CFG
9717 MachineFunction *F = MBB->getParent();
9718 MachineBasicBlock *thisMBB = MBB;
9719 MachineBasicBlock *newMBB = F->CreateMachineBasicBlock(LLVM_BB);
9720 MachineBasicBlock *nextMBB = F->CreateMachineBasicBlock(LLVM_BB);
9721 F->insert(MBBIter, newMBB);
9722 F->insert(MBBIter, nextMBB);
9724 // Transfer the remainder of thisMBB and its successor edges to nextMBB.
9725 nextMBB->splice(nextMBB->begin(), thisMBB,
9726 llvm::next(MachineBasicBlock::iterator(bInstr)),
9728 nextMBB->transferSuccessorsAndUpdatePHIs(thisMBB);
9730 // Update thisMBB to fall through to newMBB
9731 thisMBB->addSuccessor(newMBB);
9733 // newMBB jumps to itself and fall through to nextMBB
9734 newMBB->addSuccessor(nextMBB);
9735 newMBB->addSuccessor(newMBB);
9737 // Insert instructions into newMBB based on incoming instruction
9738 assert(bInstr->getNumOperands() < X86::AddrNumOperands + 4 &&
9739 "unexpected number of operands");
9740 DebugLoc dl = bInstr->getDebugLoc();
9741 MachineOperand& destOper = bInstr->getOperand(0);
9742 MachineOperand* argOpers[2 + X86::AddrNumOperands];
9743 int numArgs = bInstr->getNumOperands() - 1;
9744 for (int i=0; i < numArgs; ++i)
9745 argOpers[i] = &bInstr->getOperand(i+1);
9747 // x86 address has 4 operands: base, index, scale, and displacement
9748 int lastAddrIndx = X86::AddrNumOperands - 1; // [0,3]
9749 int valArgIndx = lastAddrIndx + 1;
9751 unsigned t1 = F->getRegInfo().createVirtualRegister(RC);
9752 MachineInstrBuilder MIB = BuildMI(newMBB, dl, TII->get(LoadOpc), t1);
9753 for (int i=0; i <= lastAddrIndx; ++i)
9754 (*MIB).addOperand(*argOpers[i]);
9756 unsigned tt = F->getRegInfo().createVirtualRegister(RC);
9758 MIB = BuildMI(newMBB, dl, TII->get(notOpc), tt).addReg(t1);
9763 unsigned t2 = F->getRegInfo().createVirtualRegister(RC);
9764 assert((argOpers[valArgIndx]->isReg() ||
9765 argOpers[valArgIndx]->isImm()) &&
9767 if (argOpers[valArgIndx]->isReg())
9768 MIB = BuildMI(newMBB, dl, TII->get(regOpc), t2);
9770 MIB = BuildMI(newMBB, dl, TII->get(immOpc), t2);
9772 (*MIB).addOperand(*argOpers[valArgIndx]);
9774 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), EAXreg);
9777 MIB = BuildMI(newMBB, dl, TII->get(CXchgOpc));
9778 for (int i=0; i <= lastAddrIndx; ++i)
9779 (*MIB).addOperand(*argOpers[i]);
9781 assert(bInstr->hasOneMemOperand() && "Unexpected number of memoperand");
9782 (*MIB).setMemRefs(bInstr->memoperands_begin(),
9783 bInstr->memoperands_end());
9785 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), destOper.getReg());
9789 BuildMI(newMBB, dl, TII->get(X86::JNE_4)).addMBB(newMBB);
9791 bInstr->eraseFromParent(); // The pseudo instruction is gone now.
9795 // private utility function: 64 bit atomics on 32 bit host.
9797 X86TargetLowering::EmitAtomicBit6432WithCustomInserter(MachineInstr *bInstr,
9798 MachineBasicBlock *MBB,
9803 bool invSrc) const {
9804 // For the atomic bitwise operator, we generate
9805 // thisMBB (instructions are in pairs, except cmpxchg8b)
9806 // ld t1,t2 = [bitinstr.addr]
9808 // out1, out2 = phi (thisMBB, t1/t2) (newMBB, t3/t4)
9809 // op t5, t6 <- out1, out2, [bitinstr.val]
9810 // (for SWAP, substitute: mov t5, t6 <- [bitinstr.val])
9811 // mov ECX, EBX <- t5, t6
9812 // mov EAX, EDX <- t1, t2
9813 // cmpxchg8b [bitinstr.addr] [EAX, EDX, EBX, ECX implicit]
9814 // mov t3, t4 <- EAX, EDX
9816 // result in out1, out2
9817 // fallthrough -->nextMBB
9819 const TargetRegisterClass *RC = X86::GR32RegisterClass;
9820 const unsigned LoadOpc = X86::MOV32rm;
9821 const unsigned NotOpc = X86::NOT32r;
9822 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
9823 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
9824 MachineFunction::iterator MBBIter = MBB;
9827 /// First build the CFG
9828 MachineFunction *F = MBB->getParent();
9829 MachineBasicBlock *thisMBB = MBB;
9830 MachineBasicBlock *newMBB = F->CreateMachineBasicBlock(LLVM_BB);
9831 MachineBasicBlock *nextMBB = F->CreateMachineBasicBlock(LLVM_BB);
9832 F->insert(MBBIter, newMBB);
9833 F->insert(MBBIter, nextMBB);
9835 // Transfer the remainder of thisMBB and its successor edges to nextMBB.
9836 nextMBB->splice(nextMBB->begin(), thisMBB,
9837 llvm::next(MachineBasicBlock::iterator(bInstr)),
9839 nextMBB->transferSuccessorsAndUpdatePHIs(thisMBB);
9841 // Update thisMBB to fall through to newMBB
9842 thisMBB->addSuccessor(newMBB);
9844 // newMBB jumps to itself and fall through to nextMBB
9845 newMBB->addSuccessor(nextMBB);
9846 newMBB->addSuccessor(newMBB);
9848 DebugLoc dl = bInstr->getDebugLoc();
9849 // Insert instructions into newMBB based on incoming instruction
9850 // There are 8 "real" operands plus 9 implicit def/uses, ignored here.
9851 assert(bInstr->getNumOperands() < X86::AddrNumOperands + 14 &&
9852 "unexpected number of operands");
9853 MachineOperand& dest1Oper = bInstr->getOperand(0);
9854 MachineOperand& dest2Oper = bInstr->getOperand(1);
9855 MachineOperand* argOpers[2 + X86::AddrNumOperands];
9856 for (int i=0; i < 2 + X86::AddrNumOperands; ++i) {
9857 argOpers[i] = &bInstr->getOperand(i+2);
9859 // We use some of the operands multiple times, so conservatively just
9860 // clear any kill flags that might be present.
9861 if (argOpers[i]->isReg() && argOpers[i]->isUse())
9862 argOpers[i]->setIsKill(false);
9865 // x86 address has 5 operands: base, index, scale, displacement, and segment.
9866 int lastAddrIndx = X86::AddrNumOperands - 1; // [0,3]
9868 unsigned t1 = F->getRegInfo().createVirtualRegister(RC);
9869 MachineInstrBuilder MIB = BuildMI(thisMBB, dl, TII->get(LoadOpc), t1);
9870 for (int i=0; i <= lastAddrIndx; ++i)
9871 (*MIB).addOperand(*argOpers[i]);
9872 unsigned t2 = F->getRegInfo().createVirtualRegister(RC);
9873 MIB = BuildMI(thisMBB, dl, TII->get(LoadOpc), t2);
9874 // add 4 to displacement.
9875 for (int i=0; i <= lastAddrIndx-2; ++i)
9876 (*MIB).addOperand(*argOpers[i]);
9877 MachineOperand newOp3 = *(argOpers[3]);
9879 newOp3.setImm(newOp3.getImm()+4);
9881 newOp3.setOffset(newOp3.getOffset()+4);
9882 (*MIB).addOperand(newOp3);
9883 (*MIB).addOperand(*argOpers[lastAddrIndx]);
9885 // t3/4 are defined later, at the bottom of the loop
9886 unsigned t3 = F->getRegInfo().createVirtualRegister(RC);
9887 unsigned t4 = F->getRegInfo().createVirtualRegister(RC);
9888 BuildMI(newMBB, dl, TII->get(X86::PHI), dest1Oper.getReg())
9889 .addReg(t1).addMBB(thisMBB).addReg(t3).addMBB(newMBB);
9890 BuildMI(newMBB, dl, TII->get(X86::PHI), dest2Oper.getReg())
9891 .addReg(t2).addMBB(thisMBB).addReg(t4).addMBB(newMBB);
9893 // The subsequent operations should be using the destination registers of
9894 //the PHI instructions.
9896 t1 = F->getRegInfo().createVirtualRegister(RC);
9897 t2 = F->getRegInfo().createVirtualRegister(RC);
9898 MIB = BuildMI(newMBB, dl, TII->get(NotOpc), t1).addReg(dest1Oper.getReg());
9899 MIB = BuildMI(newMBB, dl, TII->get(NotOpc), t2).addReg(dest2Oper.getReg());
9901 t1 = dest1Oper.getReg();
9902 t2 = dest2Oper.getReg();
9905 int valArgIndx = lastAddrIndx + 1;
9906 assert((argOpers[valArgIndx]->isReg() ||
9907 argOpers[valArgIndx]->isImm()) &&
9909 unsigned t5 = F->getRegInfo().createVirtualRegister(RC);
9910 unsigned t6 = F->getRegInfo().createVirtualRegister(RC);
9911 if (argOpers[valArgIndx]->isReg())
9912 MIB = BuildMI(newMBB, dl, TII->get(regOpcL), t5);
9914 MIB = BuildMI(newMBB, dl, TII->get(immOpcL), t5);
9915 if (regOpcL != X86::MOV32rr)
9917 (*MIB).addOperand(*argOpers[valArgIndx]);
9918 assert(argOpers[valArgIndx + 1]->isReg() ==
9919 argOpers[valArgIndx]->isReg());
9920 assert(argOpers[valArgIndx + 1]->isImm() ==
9921 argOpers[valArgIndx]->isImm());
9922 if (argOpers[valArgIndx + 1]->isReg())
9923 MIB = BuildMI(newMBB, dl, TII->get(regOpcH), t6);
9925 MIB = BuildMI(newMBB, dl, TII->get(immOpcH), t6);
9926 if (regOpcH != X86::MOV32rr)
9928 (*MIB).addOperand(*argOpers[valArgIndx + 1]);
9930 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), X86::EAX);
9932 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), X86::EDX);
9935 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), X86::EBX);
9937 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), X86::ECX);
9940 MIB = BuildMI(newMBB, dl, TII->get(X86::LCMPXCHG8B));
9941 for (int i=0; i <= lastAddrIndx; ++i)
9942 (*MIB).addOperand(*argOpers[i]);
9944 assert(bInstr->hasOneMemOperand() && "Unexpected number of memoperand");
9945 (*MIB).setMemRefs(bInstr->memoperands_begin(),
9946 bInstr->memoperands_end());
9948 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), t3);
9949 MIB.addReg(X86::EAX);
9950 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), t4);
9951 MIB.addReg(X86::EDX);
9954 BuildMI(newMBB, dl, TII->get(X86::JNE_4)).addMBB(newMBB);
9956 bInstr->eraseFromParent(); // The pseudo instruction is gone now.
9960 // private utility function
9962 X86TargetLowering::EmitAtomicMinMaxWithCustomInserter(MachineInstr *mInstr,
9963 MachineBasicBlock *MBB,
9964 unsigned cmovOpc) const {
9965 // For the atomic min/max operator, we generate
9968 // ld t1 = [min/max.addr]
9969 // mov t2 = [min/max.val]
9971 // cmov[cond] t2 = t1
9973 // lcs dest = [bitinstr.addr], t2 [EAX is implicit]
9975 // fallthrough -->nextMBB
9977 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
9978 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
9979 MachineFunction::iterator MBBIter = MBB;
9982 /// First build the CFG
9983 MachineFunction *F = MBB->getParent();
9984 MachineBasicBlock *thisMBB = MBB;
9985 MachineBasicBlock *newMBB = F->CreateMachineBasicBlock(LLVM_BB);
9986 MachineBasicBlock *nextMBB = F->CreateMachineBasicBlock(LLVM_BB);
9987 F->insert(MBBIter, newMBB);
9988 F->insert(MBBIter, nextMBB);
9990 // Transfer the remainder of thisMBB and its successor edges to nextMBB.
9991 nextMBB->splice(nextMBB->begin(), thisMBB,
9992 llvm::next(MachineBasicBlock::iterator(mInstr)),
9994 nextMBB->transferSuccessorsAndUpdatePHIs(thisMBB);
9996 // Update thisMBB to fall through to newMBB
9997 thisMBB->addSuccessor(newMBB);
9999 // newMBB jumps to newMBB and fall through to nextMBB
10000 newMBB->addSuccessor(nextMBB);
10001 newMBB->addSuccessor(newMBB);
10003 DebugLoc dl = mInstr->getDebugLoc();
10004 // Insert instructions into newMBB based on incoming instruction
10005 assert(mInstr->getNumOperands() < X86::AddrNumOperands + 4 &&
10006 "unexpected number of operands");
10007 MachineOperand& destOper = mInstr->getOperand(0);
10008 MachineOperand* argOpers[2 + X86::AddrNumOperands];
10009 int numArgs = mInstr->getNumOperands() - 1;
10010 for (int i=0; i < numArgs; ++i)
10011 argOpers[i] = &mInstr->getOperand(i+1);
10013 // x86 address has 4 operands: base, index, scale, and displacement
10014 int lastAddrIndx = X86::AddrNumOperands - 1; // [0,3]
10015 int valArgIndx = lastAddrIndx + 1;
10017 unsigned t1 = F->getRegInfo().createVirtualRegister(X86::GR32RegisterClass);
10018 MachineInstrBuilder MIB = BuildMI(newMBB, dl, TII->get(X86::MOV32rm), t1);
10019 for (int i=0; i <= lastAddrIndx; ++i)
10020 (*MIB).addOperand(*argOpers[i]);
10022 // We only support register and immediate values
10023 assert((argOpers[valArgIndx]->isReg() ||
10024 argOpers[valArgIndx]->isImm()) &&
10025 "invalid operand");
10027 unsigned t2 = F->getRegInfo().createVirtualRegister(X86::GR32RegisterClass);
10028 if (argOpers[valArgIndx]->isReg())
10029 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), t2);
10031 MIB = BuildMI(newMBB, dl, TII->get(X86::MOV32rr), t2);
10032 (*MIB).addOperand(*argOpers[valArgIndx]);
10034 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), X86::EAX);
10037 MIB = BuildMI(newMBB, dl, TII->get(X86::CMP32rr));
10042 unsigned t3 = F->getRegInfo().createVirtualRegister(X86::GR32RegisterClass);
10043 MIB = BuildMI(newMBB, dl, TII->get(cmovOpc),t3);
10047 // Cmp and exchange if none has modified the memory location
10048 MIB = BuildMI(newMBB, dl, TII->get(X86::LCMPXCHG32));
10049 for (int i=0; i <= lastAddrIndx; ++i)
10050 (*MIB).addOperand(*argOpers[i]);
10052 assert(mInstr->hasOneMemOperand() && "Unexpected number of memoperand");
10053 (*MIB).setMemRefs(mInstr->memoperands_begin(),
10054 mInstr->memoperands_end());
10056 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), destOper.getReg());
10057 MIB.addReg(X86::EAX);
10060 BuildMI(newMBB, dl, TII->get(X86::JNE_4)).addMBB(newMBB);
10062 mInstr->eraseFromParent(); // The pseudo instruction is gone now.
10066 // FIXME: When we get size specific XMM0 registers, i.e. XMM0_V16I8
10067 // or XMM0_V32I8 in AVX all of this code can be replaced with that
10068 // in the .td file.
10069 MachineBasicBlock *
10070 X86TargetLowering::EmitPCMP(MachineInstr *MI, MachineBasicBlock *BB,
10071 unsigned numArgs, bool memArg) const {
10072 assert((Subtarget->hasSSE42() || Subtarget->hasAVX()) &&
10073 "Target must have SSE4.2 or AVX features enabled");
10075 DebugLoc dl = MI->getDebugLoc();
10076 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
10078 if (!Subtarget->hasAVX()) {
10080 Opc = numArgs == 3 ? X86::PCMPISTRM128rm : X86::PCMPESTRM128rm;
10082 Opc = numArgs == 3 ? X86::PCMPISTRM128rr : X86::PCMPESTRM128rr;
10085 Opc = numArgs == 3 ? X86::VPCMPISTRM128rm : X86::VPCMPESTRM128rm;
10087 Opc = numArgs == 3 ? X86::VPCMPISTRM128rr : X86::VPCMPESTRM128rr;
10090 MachineInstrBuilder MIB = BuildMI(*BB, MI, dl, TII->get(Opc));
10091 for (unsigned i = 0; i < numArgs; ++i) {
10092 MachineOperand &Op = MI->getOperand(i+1);
10093 if (!(Op.isReg() && Op.isImplicit()))
10094 MIB.addOperand(Op);
10096 BuildMI(*BB, MI, dl, TII->get(X86::MOVAPSrr), MI->getOperand(0).getReg())
10097 .addReg(X86::XMM0);
10099 MI->eraseFromParent();
10103 MachineBasicBlock *
10104 X86TargetLowering::EmitMonitor(MachineInstr *MI, MachineBasicBlock *BB) const {
10105 DebugLoc dl = MI->getDebugLoc();
10106 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
10108 // Address into RAX/EAX, other two args into ECX, EDX.
10109 unsigned MemOpc = Subtarget->is64Bit() ? X86::LEA64r : X86::LEA32r;
10110 unsigned MemReg = Subtarget->is64Bit() ? X86::RAX : X86::EAX;
10111 MachineInstrBuilder MIB = BuildMI(*BB, MI, dl, TII->get(MemOpc), MemReg);
10112 for (int i = 0; i < X86::AddrNumOperands; ++i)
10113 MIB.addOperand(MI->getOperand(i));
10115 unsigned ValOps = X86::AddrNumOperands;
10116 BuildMI(*BB, MI, dl, TII->get(TargetOpcode::COPY), X86::ECX)
10117 .addReg(MI->getOperand(ValOps).getReg());
10118 BuildMI(*BB, MI, dl, TII->get(TargetOpcode::COPY), X86::EDX)
10119 .addReg(MI->getOperand(ValOps+1).getReg());
10121 // The instruction doesn't actually take any operands though.
10122 BuildMI(*BB, MI, dl, TII->get(X86::MONITORrrr));
10124 MI->eraseFromParent(); // The pseudo is gone now.
10128 MachineBasicBlock *
10129 X86TargetLowering::EmitMwait(MachineInstr *MI, MachineBasicBlock *BB) const {
10130 DebugLoc dl = MI->getDebugLoc();
10131 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
10133 // First arg in ECX, the second in EAX.
10134 BuildMI(*BB, MI, dl, TII->get(TargetOpcode::COPY), X86::ECX)
10135 .addReg(MI->getOperand(0).getReg());
10136 BuildMI(*BB, MI, dl, TII->get(TargetOpcode::COPY), X86::EAX)
10137 .addReg(MI->getOperand(1).getReg());
10139 // The instruction doesn't actually take any operands though.
10140 BuildMI(*BB, MI, dl, TII->get(X86::MWAITrr));
10142 MI->eraseFromParent(); // The pseudo is gone now.
10146 MachineBasicBlock *
10147 X86TargetLowering::EmitVAARG64WithCustomInserter(
10149 MachineBasicBlock *MBB) const {
10150 // Emit va_arg instruction on X86-64.
10152 // Operands to this pseudo-instruction:
10153 // 0 ) Output : destination address (reg)
10154 // 1-5) Input : va_list address (addr, i64mem)
10155 // 6 ) ArgSize : Size (in bytes) of vararg type
10156 // 7 ) ArgMode : 0=overflow only, 1=use gp_offset, 2=use fp_offset
10157 // 8 ) Align : Alignment of type
10158 // 9 ) EFLAGS (implicit-def)
10160 assert(MI->getNumOperands() == 10 && "VAARG_64 should have 10 operands!");
10161 assert(X86::AddrNumOperands == 5 && "VAARG_64 assumes 5 address operands");
10163 unsigned DestReg = MI->getOperand(0).getReg();
10164 MachineOperand &Base = MI->getOperand(1);
10165 MachineOperand &Scale = MI->getOperand(2);
10166 MachineOperand &Index = MI->getOperand(3);
10167 MachineOperand &Disp = MI->getOperand(4);
10168 MachineOperand &Segment = MI->getOperand(5);
10169 unsigned ArgSize = MI->getOperand(6).getImm();
10170 unsigned ArgMode = MI->getOperand(7).getImm();
10171 unsigned Align = MI->getOperand(8).getImm();
10173 // Memory Reference
10174 assert(MI->hasOneMemOperand() && "Expected VAARG_64 to have one memoperand");
10175 MachineInstr::mmo_iterator MMOBegin = MI->memoperands_begin();
10176 MachineInstr::mmo_iterator MMOEnd = MI->memoperands_end();
10178 // Machine Information
10179 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
10180 MachineRegisterInfo &MRI = MBB->getParent()->getRegInfo();
10181 const TargetRegisterClass *AddrRegClass = getRegClassFor(MVT::i64);
10182 const TargetRegisterClass *OffsetRegClass = getRegClassFor(MVT::i32);
10183 DebugLoc DL = MI->getDebugLoc();
10185 // struct va_list {
10188 // i64 overflow_area (address)
10189 // i64 reg_save_area (address)
10191 // sizeof(va_list) = 24
10192 // alignment(va_list) = 8
10194 unsigned TotalNumIntRegs = 6;
10195 unsigned TotalNumXMMRegs = 8;
10196 bool UseGPOffset = (ArgMode == 1);
10197 bool UseFPOffset = (ArgMode == 2);
10198 unsigned MaxOffset = TotalNumIntRegs * 8 +
10199 (UseFPOffset ? TotalNumXMMRegs * 16 : 0);
10201 /* Align ArgSize to a multiple of 8 */
10202 unsigned ArgSizeA8 = (ArgSize + 7) & ~7;
10203 bool NeedsAlign = (Align > 8);
10205 MachineBasicBlock *thisMBB = MBB;
10206 MachineBasicBlock *overflowMBB;
10207 MachineBasicBlock *offsetMBB;
10208 MachineBasicBlock *endMBB;
10210 unsigned OffsetDestReg = 0; // Argument address computed by offsetMBB
10211 unsigned OverflowDestReg = 0; // Argument address computed by overflowMBB
10212 unsigned OffsetReg = 0;
10214 if (!UseGPOffset && !UseFPOffset) {
10215 // If we only pull from the overflow region, we don't create a branch.
10216 // We don't need to alter control flow.
10217 OffsetDestReg = 0; // unused
10218 OverflowDestReg = DestReg;
10221 overflowMBB = thisMBB;
10224 // First emit code to check if gp_offset (or fp_offset) is below the bound.
10225 // If so, pull the argument from reg_save_area. (branch to offsetMBB)
10226 // If not, pull from overflow_area. (branch to overflowMBB)
10231 // offsetMBB overflowMBB
10236 // Registers for the PHI in endMBB
10237 OffsetDestReg = MRI.createVirtualRegister(AddrRegClass);
10238 OverflowDestReg = MRI.createVirtualRegister(AddrRegClass);
10240 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
10241 MachineFunction *MF = MBB->getParent();
10242 overflowMBB = MF->CreateMachineBasicBlock(LLVM_BB);
10243 offsetMBB = MF->CreateMachineBasicBlock(LLVM_BB);
10244 endMBB = MF->CreateMachineBasicBlock(LLVM_BB);
10246 MachineFunction::iterator MBBIter = MBB;
10249 // Insert the new basic blocks
10250 MF->insert(MBBIter, offsetMBB);
10251 MF->insert(MBBIter, overflowMBB);
10252 MF->insert(MBBIter, endMBB);
10254 // Transfer the remainder of MBB and its successor edges to endMBB.
10255 endMBB->splice(endMBB->begin(), thisMBB,
10256 llvm::next(MachineBasicBlock::iterator(MI)),
10258 endMBB->transferSuccessorsAndUpdatePHIs(thisMBB);
10260 // Make offsetMBB and overflowMBB successors of thisMBB
10261 thisMBB->addSuccessor(offsetMBB);
10262 thisMBB->addSuccessor(overflowMBB);
10264 // endMBB is a successor of both offsetMBB and overflowMBB
10265 offsetMBB->addSuccessor(endMBB);
10266 overflowMBB->addSuccessor(endMBB);
10268 // Load the offset value into a register
10269 OffsetReg = MRI.createVirtualRegister(OffsetRegClass);
10270 BuildMI(thisMBB, DL, TII->get(X86::MOV32rm), OffsetReg)
10274 .addDisp(Disp, UseFPOffset ? 4 : 0)
10275 .addOperand(Segment)
10276 .setMemRefs(MMOBegin, MMOEnd);
10278 // Check if there is enough room left to pull this argument.
10279 BuildMI(thisMBB, DL, TII->get(X86::CMP32ri))
10281 .addImm(MaxOffset + 8 - ArgSizeA8);
10283 // Branch to "overflowMBB" if offset >= max
10284 // Fall through to "offsetMBB" otherwise
10285 BuildMI(thisMBB, DL, TII->get(X86::GetCondBranchFromCond(X86::COND_AE)))
10286 .addMBB(overflowMBB);
10289 // In offsetMBB, emit code to use the reg_save_area.
10291 assert(OffsetReg != 0);
10293 // Read the reg_save_area address.
10294 unsigned RegSaveReg = MRI.createVirtualRegister(AddrRegClass);
10295 BuildMI(offsetMBB, DL, TII->get(X86::MOV64rm), RegSaveReg)
10300 .addOperand(Segment)
10301 .setMemRefs(MMOBegin, MMOEnd);
10303 // Zero-extend the offset
10304 unsigned OffsetReg64 = MRI.createVirtualRegister(AddrRegClass);
10305 BuildMI(offsetMBB, DL, TII->get(X86::SUBREG_TO_REG), OffsetReg64)
10308 .addImm(X86::sub_32bit);
10310 // Add the offset to the reg_save_area to get the final address.
10311 BuildMI(offsetMBB, DL, TII->get(X86::ADD64rr), OffsetDestReg)
10312 .addReg(OffsetReg64)
10313 .addReg(RegSaveReg);
10315 // Compute the offset for the next argument
10316 unsigned NextOffsetReg = MRI.createVirtualRegister(OffsetRegClass);
10317 BuildMI(offsetMBB, DL, TII->get(X86::ADD32ri), NextOffsetReg)
10319 .addImm(UseFPOffset ? 16 : 8);
10321 // Store it back into the va_list.
10322 BuildMI(offsetMBB, DL, TII->get(X86::MOV32mr))
10326 .addDisp(Disp, UseFPOffset ? 4 : 0)
10327 .addOperand(Segment)
10328 .addReg(NextOffsetReg)
10329 .setMemRefs(MMOBegin, MMOEnd);
10332 BuildMI(offsetMBB, DL, TII->get(X86::JMP_4))
10337 // Emit code to use overflow area
10340 // Load the overflow_area address into a register.
10341 unsigned OverflowAddrReg = MRI.createVirtualRegister(AddrRegClass);
10342 BuildMI(overflowMBB, DL, TII->get(X86::MOV64rm), OverflowAddrReg)
10347 .addOperand(Segment)
10348 .setMemRefs(MMOBegin, MMOEnd);
10350 // If we need to align it, do so. Otherwise, just copy the address
10351 // to OverflowDestReg.
10353 // Align the overflow address
10354 assert((Align & (Align-1)) == 0 && "Alignment must be a power of 2");
10355 unsigned TmpReg = MRI.createVirtualRegister(AddrRegClass);
10357 // aligned_addr = (addr + (align-1)) & ~(align-1)
10358 BuildMI(overflowMBB, DL, TII->get(X86::ADD64ri32), TmpReg)
10359 .addReg(OverflowAddrReg)
10362 BuildMI(overflowMBB, DL, TII->get(X86::AND64ri32), OverflowDestReg)
10364 .addImm(~(uint64_t)(Align-1));
10366 BuildMI(overflowMBB, DL, TII->get(TargetOpcode::COPY), OverflowDestReg)
10367 .addReg(OverflowAddrReg);
10370 // Compute the next overflow address after this argument.
10371 // (the overflow address should be kept 8-byte aligned)
10372 unsigned NextAddrReg = MRI.createVirtualRegister(AddrRegClass);
10373 BuildMI(overflowMBB, DL, TII->get(X86::ADD64ri32), NextAddrReg)
10374 .addReg(OverflowDestReg)
10375 .addImm(ArgSizeA8);
10377 // Store the new overflow address.
10378 BuildMI(overflowMBB, DL, TII->get(X86::MOV64mr))
10383 .addOperand(Segment)
10384 .addReg(NextAddrReg)
10385 .setMemRefs(MMOBegin, MMOEnd);
10387 // If we branched, emit the PHI to the front of endMBB.
10389 BuildMI(*endMBB, endMBB->begin(), DL,
10390 TII->get(X86::PHI), DestReg)
10391 .addReg(OffsetDestReg).addMBB(offsetMBB)
10392 .addReg(OverflowDestReg).addMBB(overflowMBB);
10395 // Erase the pseudo instruction
10396 MI->eraseFromParent();
10401 MachineBasicBlock *
10402 X86TargetLowering::EmitVAStartSaveXMMRegsWithCustomInserter(
10404 MachineBasicBlock *MBB) const {
10405 // Emit code to save XMM registers to the stack. The ABI says that the
10406 // number of registers to save is given in %al, so it's theoretically
10407 // possible to do an indirect jump trick to avoid saving all of them,
10408 // however this code takes a simpler approach and just executes all
10409 // of the stores if %al is non-zero. It's less code, and it's probably
10410 // easier on the hardware branch predictor, and stores aren't all that
10411 // expensive anyway.
10413 // Create the new basic blocks. One block contains all the XMM stores,
10414 // and one block is the final destination regardless of whether any
10415 // stores were performed.
10416 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
10417 MachineFunction *F = MBB->getParent();
10418 MachineFunction::iterator MBBIter = MBB;
10420 MachineBasicBlock *XMMSaveMBB = F->CreateMachineBasicBlock(LLVM_BB);
10421 MachineBasicBlock *EndMBB = F->CreateMachineBasicBlock(LLVM_BB);
10422 F->insert(MBBIter, XMMSaveMBB);
10423 F->insert(MBBIter, EndMBB);
10425 // Transfer the remainder of MBB and its successor edges to EndMBB.
10426 EndMBB->splice(EndMBB->begin(), MBB,
10427 llvm::next(MachineBasicBlock::iterator(MI)),
10429 EndMBB->transferSuccessorsAndUpdatePHIs(MBB);
10431 // The original block will now fall through to the XMM save block.
10432 MBB->addSuccessor(XMMSaveMBB);
10433 // The XMMSaveMBB will fall through to the end block.
10434 XMMSaveMBB->addSuccessor(EndMBB);
10436 // Now add the instructions.
10437 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
10438 DebugLoc DL = MI->getDebugLoc();
10440 unsigned CountReg = MI->getOperand(0).getReg();
10441 int64_t RegSaveFrameIndex = MI->getOperand(1).getImm();
10442 int64_t VarArgsFPOffset = MI->getOperand(2).getImm();
10444 if (!Subtarget->isTargetWin64()) {
10445 // If %al is 0, branch around the XMM save block.
10446 BuildMI(MBB, DL, TII->get(X86::TEST8rr)).addReg(CountReg).addReg(CountReg);
10447 BuildMI(MBB, DL, TII->get(X86::JE_4)).addMBB(EndMBB);
10448 MBB->addSuccessor(EndMBB);
10451 // In the XMM save block, save all the XMM argument registers.
10452 for (int i = 3, e = MI->getNumOperands(); i != e; ++i) {
10453 int64_t Offset = (i - 3) * 16 + VarArgsFPOffset;
10454 MachineMemOperand *MMO =
10455 F->getMachineMemOperand(
10456 MachinePointerInfo::getFixedStack(RegSaveFrameIndex, Offset),
10457 MachineMemOperand::MOStore,
10458 /*Size=*/16, /*Align=*/16);
10459 BuildMI(XMMSaveMBB, DL, TII->get(X86::MOVAPSmr))
10460 .addFrameIndex(RegSaveFrameIndex)
10461 .addImm(/*Scale=*/1)
10462 .addReg(/*IndexReg=*/0)
10463 .addImm(/*Disp=*/Offset)
10464 .addReg(/*Segment=*/0)
10465 .addReg(MI->getOperand(i).getReg())
10466 .addMemOperand(MMO);
10469 MI->eraseFromParent(); // The pseudo instruction is gone now.
10474 MachineBasicBlock *
10475 X86TargetLowering::EmitLoweredSelect(MachineInstr *MI,
10476 MachineBasicBlock *BB) const {
10477 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
10478 DebugLoc DL = MI->getDebugLoc();
10480 // To "insert" a SELECT_CC instruction, we actually have to insert the
10481 // diamond control-flow pattern. The incoming instruction knows the
10482 // destination vreg to set, the condition code register to branch on, the
10483 // true/false values to select between, and a branch opcode to use.
10484 const BasicBlock *LLVM_BB = BB->getBasicBlock();
10485 MachineFunction::iterator It = BB;
10491 // cmpTY ccX, r1, r2
10493 // fallthrough --> copy0MBB
10494 MachineBasicBlock *thisMBB = BB;
10495 MachineFunction *F = BB->getParent();
10496 MachineBasicBlock *copy0MBB = F->CreateMachineBasicBlock(LLVM_BB);
10497 MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB);
10498 F->insert(It, copy0MBB);
10499 F->insert(It, sinkMBB);
10501 // If the EFLAGS register isn't dead in the terminator, then claim that it's
10502 // live into the sink and copy blocks.
10503 const MachineFunction *MF = BB->getParent();
10504 const TargetRegisterInfo *TRI = MF->getTarget().getRegisterInfo();
10505 BitVector ReservedRegs = TRI->getReservedRegs(*MF);
10507 for (unsigned I = 0, E = MI->getNumOperands(); I != E; ++I) {
10508 const MachineOperand &MO = MI->getOperand(I);
10509 if (!MO.isReg() || !MO.isUse() || MO.isKill()) continue;
10510 unsigned Reg = MO.getReg();
10511 if (Reg != X86::EFLAGS) continue;
10512 copy0MBB->addLiveIn(Reg);
10513 sinkMBB->addLiveIn(Reg);
10516 // Transfer the remainder of BB and its successor edges to sinkMBB.
10517 sinkMBB->splice(sinkMBB->begin(), BB,
10518 llvm::next(MachineBasicBlock::iterator(MI)),
10520 sinkMBB->transferSuccessorsAndUpdatePHIs(BB);
10522 // Add the true and fallthrough blocks as its successors.
10523 BB->addSuccessor(copy0MBB);
10524 BB->addSuccessor(sinkMBB);
10526 // Create the conditional branch instruction.
10528 X86::GetCondBranchFromCond((X86::CondCode)MI->getOperand(3).getImm());
10529 BuildMI(BB, DL, TII->get(Opc)).addMBB(sinkMBB);
10532 // %FalseValue = ...
10533 // # fallthrough to sinkMBB
10534 copy0MBB->addSuccessor(sinkMBB);
10537 // %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
10539 BuildMI(*sinkMBB, sinkMBB->begin(), DL,
10540 TII->get(X86::PHI), MI->getOperand(0).getReg())
10541 .addReg(MI->getOperand(1).getReg()).addMBB(copy0MBB)
10542 .addReg(MI->getOperand(2).getReg()).addMBB(thisMBB);
10544 MI->eraseFromParent(); // The pseudo instruction is gone now.
10548 MachineBasicBlock *
10549 X86TargetLowering::EmitLoweredWinAlloca(MachineInstr *MI,
10550 MachineBasicBlock *BB) const {
10551 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
10552 DebugLoc DL = MI->getDebugLoc();
10554 assert(!Subtarget->isTargetEnvMacho());
10556 // The lowering is pretty easy: we're just emitting the call to _alloca. The
10557 // non-trivial part is impdef of ESP.
10559 if (Subtarget->isTargetWin64()) {
10560 if (Subtarget->isTargetCygMing()) {
10561 // ___chkstk(Mingw64):
10562 // Clobbers R10, R11, RAX and EFLAGS.
10564 BuildMI(*BB, MI, DL, TII->get(X86::W64ALLOCA))
10565 .addExternalSymbol("___chkstk")
10566 .addReg(X86::RAX, RegState::Implicit)
10567 .addReg(X86::RSP, RegState::Implicit)
10568 .addReg(X86::RAX, RegState::Define | RegState::Implicit)
10569 .addReg(X86::RSP, RegState::Define | RegState::Implicit)
10570 .addReg(X86::EFLAGS, RegState::Define | RegState::Implicit);
10572 // __chkstk(MSVCRT): does not update stack pointer.
10573 // Clobbers R10, R11 and EFLAGS.
10574 // FIXME: RAX(allocated size) might be reused and not killed.
10575 BuildMI(*BB, MI, DL, TII->get(X86::W64ALLOCA))
10576 .addExternalSymbol("__chkstk")
10577 .addReg(X86::RAX, RegState::Implicit)
10578 .addReg(X86::EFLAGS, RegState::Define | RegState::Implicit);
10579 // RAX has the offset to subtracted from RSP.
10580 BuildMI(*BB, MI, DL, TII->get(X86::SUB64rr), X86::RSP)
10585 const char *StackProbeSymbol =
10586 Subtarget->isTargetWindows() ? "_chkstk" : "_alloca";
10588 BuildMI(*BB, MI, DL, TII->get(X86::CALLpcrel32))
10589 .addExternalSymbol(StackProbeSymbol)
10590 .addReg(X86::EAX, RegState::Implicit)
10591 .addReg(X86::ESP, RegState::Implicit)
10592 .addReg(X86::EAX, RegState::Define | RegState::Implicit)
10593 .addReg(X86::ESP, RegState::Define | RegState::Implicit)
10594 .addReg(X86::EFLAGS, RegState::Define | RegState::Implicit);
10597 MI->eraseFromParent(); // The pseudo instruction is gone now.
10601 MachineBasicBlock *
10602 X86TargetLowering::EmitLoweredTLSCall(MachineInstr *MI,
10603 MachineBasicBlock *BB) const {
10604 // This is pretty easy. We're taking the value that we received from
10605 // our load from the relocation, sticking it in either RDI (x86-64)
10606 // or EAX and doing an indirect call. The return value will then
10607 // be in the normal return register.
10608 const X86InstrInfo *TII
10609 = static_cast<const X86InstrInfo*>(getTargetMachine().getInstrInfo());
10610 DebugLoc DL = MI->getDebugLoc();
10611 MachineFunction *F = BB->getParent();
10613 assert(Subtarget->isTargetDarwin() && "Darwin only instr emitted?");
10614 assert(MI->getOperand(3).isGlobal() && "This should be a global");
10616 if (Subtarget->is64Bit()) {
10617 MachineInstrBuilder MIB = BuildMI(*BB, MI, DL,
10618 TII->get(X86::MOV64rm), X86::RDI)
10620 .addImm(0).addReg(0)
10621 .addGlobalAddress(MI->getOperand(3).getGlobal(), 0,
10622 MI->getOperand(3).getTargetFlags())
10624 MIB = BuildMI(*BB, MI, DL, TII->get(X86::CALL64m));
10625 addDirectMem(MIB, X86::RDI);
10626 } else if (getTargetMachine().getRelocationModel() != Reloc::PIC_) {
10627 MachineInstrBuilder MIB = BuildMI(*BB, MI, DL,
10628 TII->get(X86::MOV32rm), X86::EAX)
10630 .addImm(0).addReg(0)
10631 .addGlobalAddress(MI->getOperand(3).getGlobal(), 0,
10632 MI->getOperand(3).getTargetFlags())
10634 MIB = BuildMI(*BB, MI, DL, TII->get(X86::CALL32m));
10635 addDirectMem(MIB, X86::EAX);
10637 MachineInstrBuilder MIB = BuildMI(*BB, MI, DL,
10638 TII->get(X86::MOV32rm), X86::EAX)
10639 .addReg(TII->getGlobalBaseReg(F))
10640 .addImm(0).addReg(0)
10641 .addGlobalAddress(MI->getOperand(3).getGlobal(), 0,
10642 MI->getOperand(3).getTargetFlags())
10644 MIB = BuildMI(*BB, MI, DL, TII->get(X86::CALL32m));
10645 addDirectMem(MIB, X86::EAX);
10648 MI->eraseFromParent(); // The pseudo instruction is gone now.
10652 MachineBasicBlock *
10653 X86TargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
10654 MachineBasicBlock *BB) const {
10655 switch (MI->getOpcode()) {
10656 default: assert(false && "Unexpected instr type to insert");
10657 case X86::TAILJMPd64:
10658 case X86::TAILJMPr64:
10659 case X86::TAILJMPm64:
10660 assert(!"TAILJMP64 would not be touched here.");
10661 case X86::TCRETURNdi64:
10662 case X86::TCRETURNri64:
10663 case X86::TCRETURNmi64:
10664 // Defs of TCRETURNxx64 has Win64's callee-saved registers, as subset.
10665 // On AMD64, additional defs should be added before register allocation.
10666 if (!Subtarget->isTargetWin64()) {
10667 MI->addRegisterDefined(X86::RSI);
10668 MI->addRegisterDefined(X86::RDI);
10669 MI->addRegisterDefined(X86::XMM6);
10670 MI->addRegisterDefined(X86::XMM7);
10671 MI->addRegisterDefined(X86::XMM8);
10672 MI->addRegisterDefined(X86::XMM9);
10673 MI->addRegisterDefined(X86::XMM10);
10674 MI->addRegisterDefined(X86::XMM11);
10675 MI->addRegisterDefined(X86::XMM12);
10676 MI->addRegisterDefined(X86::XMM13);
10677 MI->addRegisterDefined(X86::XMM14);
10678 MI->addRegisterDefined(X86::XMM15);
10681 case X86::WIN_ALLOCA:
10682 return EmitLoweredWinAlloca(MI, BB);
10683 case X86::TLSCall_32:
10684 case X86::TLSCall_64:
10685 return EmitLoweredTLSCall(MI, BB);
10686 case X86::CMOV_GR8:
10687 case X86::CMOV_FR32:
10688 case X86::CMOV_FR64:
10689 case X86::CMOV_V4F32:
10690 case X86::CMOV_V2F64:
10691 case X86::CMOV_V2I64:
10692 case X86::CMOV_GR16:
10693 case X86::CMOV_GR32:
10694 case X86::CMOV_RFP32:
10695 case X86::CMOV_RFP64:
10696 case X86::CMOV_RFP80:
10697 return EmitLoweredSelect(MI, BB);
10699 case X86::FP32_TO_INT16_IN_MEM:
10700 case X86::FP32_TO_INT32_IN_MEM:
10701 case X86::FP32_TO_INT64_IN_MEM:
10702 case X86::FP64_TO_INT16_IN_MEM:
10703 case X86::FP64_TO_INT32_IN_MEM:
10704 case X86::FP64_TO_INT64_IN_MEM:
10705 case X86::FP80_TO_INT16_IN_MEM:
10706 case X86::FP80_TO_INT32_IN_MEM:
10707 case X86::FP80_TO_INT64_IN_MEM: {
10708 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
10709 DebugLoc DL = MI->getDebugLoc();
10711 // Change the floating point control register to use "round towards zero"
10712 // mode when truncating to an integer value.
10713 MachineFunction *F = BB->getParent();
10714 int CWFrameIdx = F->getFrameInfo()->CreateStackObject(2, 2, false);
10715 addFrameReference(BuildMI(*BB, MI, DL,
10716 TII->get(X86::FNSTCW16m)), CWFrameIdx);
10718 // Load the old value of the high byte of the control word...
10720 F->getRegInfo().createVirtualRegister(X86::GR16RegisterClass);
10721 addFrameReference(BuildMI(*BB, MI, DL, TII->get(X86::MOV16rm), OldCW),
10724 // Set the high part to be round to zero...
10725 addFrameReference(BuildMI(*BB, MI, DL, TII->get(X86::MOV16mi)), CWFrameIdx)
10728 // Reload the modified control word now...
10729 addFrameReference(BuildMI(*BB, MI, DL,
10730 TII->get(X86::FLDCW16m)), CWFrameIdx);
10732 // Restore the memory image of control word to original value
10733 addFrameReference(BuildMI(*BB, MI, DL, TII->get(X86::MOV16mr)), CWFrameIdx)
10736 // Get the X86 opcode to use.
10738 switch (MI->getOpcode()) {
10739 default: llvm_unreachable("illegal opcode!");
10740 case X86::FP32_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m32; break;
10741 case X86::FP32_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m32; break;
10742 case X86::FP32_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m32; break;
10743 case X86::FP64_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m64; break;
10744 case X86::FP64_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m64; break;
10745 case X86::FP64_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m64; break;
10746 case X86::FP80_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m80; break;
10747 case X86::FP80_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m80; break;
10748 case X86::FP80_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m80; break;
10752 MachineOperand &Op = MI->getOperand(0);
10754 AM.BaseType = X86AddressMode::RegBase;
10755 AM.Base.Reg = Op.getReg();
10757 AM.BaseType = X86AddressMode::FrameIndexBase;
10758 AM.Base.FrameIndex = Op.getIndex();
10760 Op = MI->getOperand(1);
10762 AM.Scale = Op.getImm();
10763 Op = MI->getOperand(2);
10765 AM.IndexReg = Op.getImm();
10766 Op = MI->getOperand(3);
10767 if (Op.isGlobal()) {
10768 AM.GV = Op.getGlobal();
10770 AM.Disp = Op.getImm();
10772 addFullAddress(BuildMI(*BB, MI, DL, TII->get(Opc)), AM)
10773 .addReg(MI->getOperand(X86::AddrNumOperands).getReg());
10775 // Reload the original control word now.
10776 addFrameReference(BuildMI(*BB, MI, DL,
10777 TII->get(X86::FLDCW16m)), CWFrameIdx);
10779 MI->eraseFromParent(); // The pseudo instruction is gone now.
10782 // String/text processing lowering.
10783 case X86::PCMPISTRM128REG:
10784 case X86::VPCMPISTRM128REG:
10785 return EmitPCMP(MI, BB, 3, false /* in-mem */);
10786 case X86::PCMPISTRM128MEM:
10787 case X86::VPCMPISTRM128MEM:
10788 return EmitPCMP(MI, BB, 3, true /* in-mem */);
10789 case X86::PCMPESTRM128REG:
10790 case X86::VPCMPESTRM128REG:
10791 return EmitPCMP(MI, BB, 5, false /* in mem */);
10792 case X86::PCMPESTRM128MEM:
10793 case X86::VPCMPESTRM128MEM:
10794 return EmitPCMP(MI, BB, 5, true /* in mem */);
10796 // Thread synchronization.
10798 return EmitMonitor(MI, BB);
10800 return EmitMwait(MI, BB);
10802 // Atomic Lowering.
10803 case X86::ATOMAND32:
10804 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND32rr,
10805 X86::AND32ri, X86::MOV32rm,
10807 X86::NOT32r, X86::EAX,
10808 X86::GR32RegisterClass);
10809 case X86::ATOMOR32:
10810 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::OR32rr,
10811 X86::OR32ri, X86::MOV32rm,
10813 X86::NOT32r, X86::EAX,
10814 X86::GR32RegisterClass);
10815 case X86::ATOMXOR32:
10816 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::XOR32rr,
10817 X86::XOR32ri, X86::MOV32rm,
10819 X86::NOT32r, X86::EAX,
10820 X86::GR32RegisterClass);
10821 case X86::ATOMNAND32:
10822 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND32rr,
10823 X86::AND32ri, X86::MOV32rm,
10825 X86::NOT32r, X86::EAX,
10826 X86::GR32RegisterClass, true);
10827 case X86::ATOMMIN32:
10828 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVL32rr);
10829 case X86::ATOMMAX32:
10830 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVG32rr);
10831 case X86::ATOMUMIN32:
10832 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVB32rr);
10833 case X86::ATOMUMAX32:
10834 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVA32rr);
10836 case X86::ATOMAND16:
10837 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND16rr,
10838 X86::AND16ri, X86::MOV16rm,
10840 X86::NOT16r, X86::AX,
10841 X86::GR16RegisterClass);
10842 case X86::ATOMOR16:
10843 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::OR16rr,
10844 X86::OR16ri, X86::MOV16rm,
10846 X86::NOT16r, X86::AX,
10847 X86::GR16RegisterClass);
10848 case X86::ATOMXOR16:
10849 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::XOR16rr,
10850 X86::XOR16ri, X86::MOV16rm,
10852 X86::NOT16r, X86::AX,
10853 X86::GR16RegisterClass);
10854 case X86::ATOMNAND16:
10855 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND16rr,
10856 X86::AND16ri, X86::MOV16rm,
10858 X86::NOT16r, X86::AX,
10859 X86::GR16RegisterClass, true);
10860 case X86::ATOMMIN16:
10861 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVL16rr);
10862 case X86::ATOMMAX16:
10863 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVG16rr);
10864 case X86::ATOMUMIN16:
10865 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVB16rr);
10866 case X86::ATOMUMAX16:
10867 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVA16rr);
10869 case X86::ATOMAND8:
10870 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND8rr,
10871 X86::AND8ri, X86::MOV8rm,
10873 X86::NOT8r, X86::AL,
10874 X86::GR8RegisterClass);
10876 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::OR8rr,
10877 X86::OR8ri, X86::MOV8rm,
10879 X86::NOT8r, X86::AL,
10880 X86::GR8RegisterClass);
10881 case X86::ATOMXOR8:
10882 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::XOR8rr,
10883 X86::XOR8ri, X86::MOV8rm,
10885 X86::NOT8r, X86::AL,
10886 X86::GR8RegisterClass);
10887 case X86::ATOMNAND8:
10888 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND8rr,
10889 X86::AND8ri, X86::MOV8rm,
10891 X86::NOT8r, X86::AL,
10892 X86::GR8RegisterClass, true);
10893 // FIXME: There are no CMOV8 instructions; MIN/MAX need some other way.
10894 // This group is for 64-bit host.
10895 case X86::ATOMAND64:
10896 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND64rr,
10897 X86::AND64ri32, X86::MOV64rm,
10899 X86::NOT64r, X86::RAX,
10900 X86::GR64RegisterClass);
10901 case X86::ATOMOR64:
10902 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::OR64rr,
10903 X86::OR64ri32, X86::MOV64rm,
10905 X86::NOT64r, X86::RAX,
10906 X86::GR64RegisterClass);
10907 case X86::ATOMXOR64:
10908 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::XOR64rr,
10909 X86::XOR64ri32, X86::MOV64rm,
10911 X86::NOT64r, X86::RAX,
10912 X86::GR64RegisterClass);
10913 case X86::ATOMNAND64:
10914 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND64rr,
10915 X86::AND64ri32, X86::MOV64rm,
10917 X86::NOT64r, X86::RAX,
10918 X86::GR64RegisterClass, true);
10919 case X86::ATOMMIN64:
10920 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVL64rr);
10921 case X86::ATOMMAX64:
10922 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVG64rr);
10923 case X86::ATOMUMIN64:
10924 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVB64rr);
10925 case X86::ATOMUMAX64:
10926 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVA64rr);
10928 // This group does 64-bit operations on a 32-bit host.
10929 case X86::ATOMAND6432:
10930 return EmitAtomicBit6432WithCustomInserter(MI, BB,
10931 X86::AND32rr, X86::AND32rr,
10932 X86::AND32ri, X86::AND32ri,
10934 case X86::ATOMOR6432:
10935 return EmitAtomicBit6432WithCustomInserter(MI, BB,
10936 X86::OR32rr, X86::OR32rr,
10937 X86::OR32ri, X86::OR32ri,
10939 case X86::ATOMXOR6432:
10940 return EmitAtomicBit6432WithCustomInserter(MI, BB,
10941 X86::XOR32rr, X86::XOR32rr,
10942 X86::XOR32ri, X86::XOR32ri,
10944 case X86::ATOMNAND6432:
10945 return EmitAtomicBit6432WithCustomInserter(MI, BB,
10946 X86::AND32rr, X86::AND32rr,
10947 X86::AND32ri, X86::AND32ri,
10949 case X86::ATOMADD6432:
10950 return EmitAtomicBit6432WithCustomInserter(MI, BB,
10951 X86::ADD32rr, X86::ADC32rr,
10952 X86::ADD32ri, X86::ADC32ri,
10954 case X86::ATOMSUB6432:
10955 return EmitAtomicBit6432WithCustomInserter(MI, BB,
10956 X86::SUB32rr, X86::SBB32rr,
10957 X86::SUB32ri, X86::SBB32ri,
10959 case X86::ATOMSWAP6432:
10960 return EmitAtomicBit6432WithCustomInserter(MI, BB,
10961 X86::MOV32rr, X86::MOV32rr,
10962 X86::MOV32ri, X86::MOV32ri,
10964 case X86::VASTART_SAVE_XMM_REGS:
10965 return EmitVAStartSaveXMMRegsWithCustomInserter(MI, BB);
10967 case X86::VAARG_64:
10968 return EmitVAARG64WithCustomInserter(MI, BB);
10972 //===----------------------------------------------------------------------===//
10973 // X86 Optimization Hooks
10974 //===----------------------------------------------------------------------===//
10976 void X86TargetLowering::computeMaskedBitsForTargetNode(const SDValue Op,
10980 const SelectionDAG &DAG,
10981 unsigned Depth) const {
10982 unsigned Opc = Op.getOpcode();
10983 assert((Opc >= ISD::BUILTIN_OP_END ||
10984 Opc == ISD::INTRINSIC_WO_CHAIN ||
10985 Opc == ISD::INTRINSIC_W_CHAIN ||
10986 Opc == ISD::INTRINSIC_VOID) &&
10987 "Should use MaskedValueIsZero if you don't know whether Op"
10988 " is a target node!");
10990 KnownZero = KnownOne = APInt(Mask.getBitWidth(), 0); // Don't know anything.
11004 // These nodes' second result is a boolean.
11005 if (Op.getResNo() == 0)
11008 case X86ISD::SETCC:
11009 KnownZero |= APInt::getHighBitsSet(Mask.getBitWidth(),
11010 Mask.getBitWidth() - 1);
11015 unsigned X86TargetLowering::ComputeNumSignBitsForTargetNode(SDValue Op,
11016 unsigned Depth) const {
11017 // SETCC_CARRY sets the dest to ~0 for true or 0 for false.
11018 if (Op.getOpcode() == X86ISD::SETCC_CARRY)
11019 return Op.getValueType().getScalarType().getSizeInBits();
11025 /// isGAPlusOffset - Returns true (and the GlobalValue and the offset) if the
11026 /// node is a GlobalAddress + offset.
11027 bool X86TargetLowering::isGAPlusOffset(SDNode *N,
11028 const GlobalValue* &GA,
11029 int64_t &Offset) const {
11030 if (N->getOpcode() == X86ISD::Wrapper) {
11031 if (isa<GlobalAddressSDNode>(N->getOperand(0))) {
11032 GA = cast<GlobalAddressSDNode>(N->getOperand(0))->getGlobal();
11033 Offset = cast<GlobalAddressSDNode>(N->getOperand(0))->getOffset();
11037 return TargetLowering::isGAPlusOffset(N, GA, Offset);
11040 /// PerformShuffleCombine - Combine a vector_shuffle that is equal to
11041 /// build_vector load1, load2, load3, load4, <0, 1, 2, 3> into a 128-bit load
11042 /// if the load addresses are consecutive, non-overlapping, and in the right
11044 static SDValue PerformShuffleCombine(SDNode *N, SelectionDAG &DAG,
11045 TargetLowering::DAGCombinerInfo &DCI) {
11046 DebugLoc dl = N->getDebugLoc();
11047 EVT VT = N->getValueType(0);
11049 if (VT.getSizeInBits() != 128)
11052 // Don't create instructions with illegal types after legalize types has run.
11053 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
11054 if (!DCI.isBeforeLegalize() && !TLI.isTypeLegal(VT.getVectorElementType()))
11057 SmallVector<SDValue, 16> Elts;
11058 for (unsigned i = 0, e = VT.getVectorNumElements(); i != e; ++i)
11059 Elts.push_back(getShuffleScalarElt(N, i, DAG, 0));
11061 return EltsFromConsecutiveLoads(VT, Elts, dl, DAG);
11064 /// PerformEXTRACT_VECTOR_ELTCombine - Detect vector gather/scatter index
11065 /// generation and convert it from being a bunch of shuffles and extracts
11066 /// to a simple store and scalar loads to extract the elements.
11067 static SDValue PerformEXTRACT_VECTOR_ELTCombine(SDNode *N, SelectionDAG &DAG,
11068 const TargetLowering &TLI) {
11069 SDValue InputVector = N->getOperand(0);
11071 // Only operate on vectors of 4 elements, where the alternative shuffling
11072 // gets to be more expensive.
11073 if (InputVector.getValueType() != MVT::v4i32)
11076 // Check whether every use of InputVector is an EXTRACT_VECTOR_ELT with a
11077 // single use which is a sign-extend or zero-extend, and all elements are
11079 SmallVector<SDNode *, 4> Uses;
11080 unsigned ExtractedElements = 0;
11081 for (SDNode::use_iterator UI = InputVector.getNode()->use_begin(),
11082 UE = InputVector.getNode()->use_end(); UI != UE; ++UI) {
11083 if (UI.getUse().getResNo() != InputVector.getResNo())
11086 SDNode *Extract = *UI;
11087 if (Extract->getOpcode() != ISD::EXTRACT_VECTOR_ELT)
11090 if (Extract->getValueType(0) != MVT::i32)
11092 if (!Extract->hasOneUse())
11094 if (Extract->use_begin()->getOpcode() != ISD::SIGN_EXTEND &&
11095 Extract->use_begin()->getOpcode() != ISD::ZERO_EXTEND)
11097 if (!isa<ConstantSDNode>(Extract->getOperand(1)))
11100 // Record which element was extracted.
11101 ExtractedElements |=
11102 1 << cast<ConstantSDNode>(Extract->getOperand(1))->getZExtValue();
11104 Uses.push_back(Extract);
11107 // If not all the elements were used, this may not be worthwhile.
11108 if (ExtractedElements != 15)
11111 // Ok, we've now decided to do the transformation.
11112 DebugLoc dl = InputVector.getDebugLoc();
11114 // Store the value to a temporary stack slot.
11115 SDValue StackPtr = DAG.CreateStackTemporary(InputVector.getValueType());
11116 SDValue Ch = DAG.getStore(DAG.getEntryNode(), dl, InputVector, StackPtr,
11117 MachinePointerInfo(), false, false, 0);
11119 // Replace each use (extract) with a load of the appropriate element.
11120 for (SmallVectorImpl<SDNode *>::iterator UI = Uses.begin(),
11121 UE = Uses.end(); UI != UE; ++UI) {
11122 SDNode *Extract = *UI;
11124 // cOMpute the element's address.
11125 SDValue Idx = Extract->getOperand(1);
11127 InputVector.getValueType().getVectorElementType().getSizeInBits()/8;
11128 uint64_t Offset = EltSize * cast<ConstantSDNode>(Idx)->getZExtValue();
11129 SDValue OffsetVal = DAG.getConstant(Offset, TLI.getPointerTy());
11131 SDValue ScalarAddr = DAG.getNode(ISD::ADD, dl, TLI.getPointerTy(),
11132 StackPtr, OffsetVal);
11134 // Load the scalar.
11135 SDValue LoadScalar = DAG.getLoad(Extract->getValueType(0), dl, Ch,
11136 ScalarAddr, MachinePointerInfo(),
11139 // Replace the exact with the load.
11140 DAG.ReplaceAllUsesOfValueWith(SDValue(Extract, 0), LoadScalar);
11143 // The replacement was made in place; don't return anything.
11147 /// PerformSELECTCombine - Do target-specific dag combines on SELECT nodes.
11148 static SDValue PerformSELECTCombine(SDNode *N, SelectionDAG &DAG,
11149 const X86Subtarget *Subtarget) {
11150 DebugLoc DL = N->getDebugLoc();
11151 SDValue Cond = N->getOperand(0);
11152 // Get the LHS/RHS of the select.
11153 SDValue LHS = N->getOperand(1);
11154 SDValue RHS = N->getOperand(2);
11156 // If we have SSE[12] support, try to form min/max nodes. SSE min/max
11157 // instructions match the semantics of the common C idiom x<y?x:y but not
11158 // x<=y?x:y, because of how they handle negative zero (which can be
11159 // ignored in unsafe-math mode).
11160 if (Subtarget->hasSSE2() &&
11161 (LHS.getValueType() == MVT::f32 || LHS.getValueType() == MVT::f64) &&
11162 Cond.getOpcode() == ISD::SETCC) {
11163 ISD::CondCode CC = cast<CondCodeSDNode>(Cond.getOperand(2))->get();
11165 unsigned Opcode = 0;
11166 // Check for x CC y ? x : y.
11167 if (DAG.isEqualTo(LHS, Cond.getOperand(0)) &&
11168 DAG.isEqualTo(RHS, Cond.getOperand(1))) {
11172 // Converting this to a min would handle NaNs incorrectly, and swapping
11173 // the operands would cause it to handle comparisons between positive
11174 // and negative zero incorrectly.
11175 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS)) {
11176 if (!UnsafeFPMath &&
11177 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS)))
11179 std::swap(LHS, RHS);
11181 Opcode = X86ISD::FMIN;
11184 // Converting this to a min would handle comparisons between positive
11185 // and negative zero incorrectly.
11186 if (!UnsafeFPMath &&
11187 !DAG.isKnownNeverZero(LHS) && !DAG.isKnownNeverZero(RHS))
11189 Opcode = X86ISD::FMIN;
11192 // Converting this to a min would handle both negative zeros and NaNs
11193 // incorrectly, but we can swap the operands to fix both.
11194 std::swap(LHS, RHS);
11198 Opcode = X86ISD::FMIN;
11202 // Converting this to a max would handle comparisons between positive
11203 // and negative zero incorrectly.
11204 if (!UnsafeFPMath &&
11205 !DAG.isKnownNeverZero(LHS) && !DAG.isKnownNeverZero(LHS))
11207 Opcode = X86ISD::FMAX;
11210 // Converting this to a max would handle NaNs incorrectly, and swapping
11211 // the operands would cause it to handle comparisons between positive
11212 // and negative zero incorrectly.
11213 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS)) {
11214 if (!UnsafeFPMath &&
11215 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS)))
11217 std::swap(LHS, RHS);
11219 Opcode = X86ISD::FMAX;
11222 // Converting this to a max would handle both negative zeros and NaNs
11223 // incorrectly, but we can swap the operands to fix both.
11224 std::swap(LHS, RHS);
11228 Opcode = X86ISD::FMAX;
11231 // Check for x CC y ? y : x -- a min/max with reversed arms.
11232 } else if (DAG.isEqualTo(LHS, Cond.getOperand(1)) &&
11233 DAG.isEqualTo(RHS, Cond.getOperand(0))) {
11237 // Converting this to a min would handle comparisons between positive
11238 // and negative zero incorrectly, and swapping the operands would
11239 // cause it to handle NaNs incorrectly.
11240 if (!UnsafeFPMath &&
11241 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS))) {
11242 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS))
11244 std::swap(LHS, RHS);
11246 Opcode = X86ISD::FMIN;
11249 // Converting this to a min would handle NaNs incorrectly.
11250 if (!UnsafeFPMath &&
11251 (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS)))
11253 Opcode = X86ISD::FMIN;
11256 // Converting this to a min would handle both negative zeros and NaNs
11257 // incorrectly, but we can swap the operands to fix both.
11258 std::swap(LHS, RHS);
11262 Opcode = X86ISD::FMIN;
11266 // Converting this to a max would handle NaNs incorrectly.
11267 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS))
11269 Opcode = X86ISD::FMAX;
11272 // Converting this to a max would handle comparisons between positive
11273 // and negative zero incorrectly, and swapping the operands would
11274 // cause it to handle NaNs incorrectly.
11275 if (!UnsafeFPMath &&
11276 !DAG.isKnownNeverZero(LHS) && !DAG.isKnownNeverZero(RHS)) {
11277 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS))
11279 std::swap(LHS, RHS);
11281 Opcode = X86ISD::FMAX;
11284 // Converting this to a max would handle both negative zeros and NaNs
11285 // incorrectly, but we can swap the operands to fix both.
11286 std::swap(LHS, RHS);
11290 Opcode = X86ISD::FMAX;
11296 return DAG.getNode(Opcode, DL, N->getValueType(0), LHS, RHS);
11299 // If this is a select between two integer constants, try to do some
11301 if (ConstantSDNode *TrueC = dyn_cast<ConstantSDNode>(LHS)) {
11302 if (ConstantSDNode *FalseC = dyn_cast<ConstantSDNode>(RHS))
11303 // Don't do this for crazy integer types.
11304 if (DAG.getTargetLoweringInfo().isTypeLegal(LHS.getValueType())) {
11305 // If this is efficiently invertible, canonicalize the LHSC/RHSC values
11306 // so that TrueC (the true value) is larger than FalseC.
11307 bool NeedsCondInvert = false;
11309 if (TrueC->getAPIntValue().ult(FalseC->getAPIntValue()) &&
11310 // Efficiently invertible.
11311 (Cond.getOpcode() == ISD::SETCC || // setcc -> invertible.
11312 (Cond.getOpcode() == ISD::XOR && // xor(X, C) -> invertible.
11313 isa<ConstantSDNode>(Cond.getOperand(1))))) {
11314 NeedsCondInvert = true;
11315 std::swap(TrueC, FalseC);
11318 // Optimize C ? 8 : 0 -> zext(C) << 3. Likewise for any pow2/0.
11319 if (FalseC->getAPIntValue() == 0 &&
11320 TrueC->getAPIntValue().isPowerOf2()) {
11321 if (NeedsCondInvert) // Invert the condition if needed.
11322 Cond = DAG.getNode(ISD::XOR, DL, Cond.getValueType(), Cond,
11323 DAG.getConstant(1, Cond.getValueType()));
11325 // Zero extend the condition if needed.
11326 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, LHS.getValueType(), Cond);
11328 unsigned ShAmt = TrueC->getAPIntValue().logBase2();
11329 return DAG.getNode(ISD::SHL, DL, LHS.getValueType(), Cond,
11330 DAG.getConstant(ShAmt, MVT::i8));
11333 // Optimize Cond ? cst+1 : cst -> zext(setcc(C)+cst.
11334 if (FalseC->getAPIntValue()+1 == TrueC->getAPIntValue()) {
11335 if (NeedsCondInvert) // Invert the condition if needed.
11336 Cond = DAG.getNode(ISD::XOR, DL, Cond.getValueType(), Cond,
11337 DAG.getConstant(1, Cond.getValueType()));
11339 // Zero extend the condition if needed.
11340 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL,
11341 FalseC->getValueType(0), Cond);
11342 return DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond,
11343 SDValue(FalseC, 0));
11346 // Optimize cases that will turn into an LEA instruction. This requires
11347 // an i32 or i64 and an efficient multiplier (1, 2, 3, 4, 5, 8, 9).
11348 if (N->getValueType(0) == MVT::i32 || N->getValueType(0) == MVT::i64) {
11349 uint64_t Diff = TrueC->getZExtValue()-FalseC->getZExtValue();
11350 if (N->getValueType(0) == MVT::i32) Diff = (unsigned)Diff;
11352 bool isFastMultiplier = false;
11354 switch ((unsigned char)Diff) {
11356 case 1: // result = add base, cond
11357 case 2: // result = lea base( , cond*2)
11358 case 3: // result = lea base(cond, cond*2)
11359 case 4: // result = lea base( , cond*4)
11360 case 5: // result = lea base(cond, cond*4)
11361 case 8: // result = lea base( , cond*8)
11362 case 9: // result = lea base(cond, cond*8)
11363 isFastMultiplier = true;
11368 if (isFastMultiplier) {
11369 APInt Diff = TrueC->getAPIntValue()-FalseC->getAPIntValue();
11370 if (NeedsCondInvert) // Invert the condition if needed.
11371 Cond = DAG.getNode(ISD::XOR, DL, Cond.getValueType(), Cond,
11372 DAG.getConstant(1, Cond.getValueType()));
11374 // Zero extend the condition if needed.
11375 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, FalseC->getValueType(0),
11377 // Scale the condition by the difference.
11379 Cond = DAG.getNode(ISD::MUL, DL, Cond.getValueType(), Cond,
11380 DAG.getConstant(Diff, Cond.getValueType()));
11382 // Add the base if non-zero.
11383 if (FalseC->getAPIntValue() != 0)
11384 Cond = DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond,
11385 SDValue(FalseC, 0));
11395 /// Optimize X86ISD::CMOV [LHS, RHS, CONDCODE (e.g. X86::COND_NE), CONDVAL]
11396 static SDValue PerformCMOVCombine(SDNode *N, SelectionDAG &DAG,
11397 TargetLowering::DAGCombinerInfo &DCI) {
11398 DebugLoc DL = N->getDebugLoc();
11400 // If the flag operand isn't dead, don't touch this CMOV.
11401 if (N->getNumValues() == 2 && !SDValue(N, 1).use_empty())
11404 SDValue FalseOp = N->getOperand(0);
11405 SDValue TrueOp = N->getOperand(1);
11406 X86::CondCode CC = (X86::CondCode)N->getConstantOperandVal(2);
11407 SDValue Cond = N->getOperand(3);
11408 if (CC == X86::COND_E || CC == X86::COND_NE) {
11409 switch (Cond.getOpcode()) {
11413 // If operand of BSR / BSF are proven never zero, then ZF cannot be set.
11414 if (DAG.isKnownNeverZero(Cond.getOperand(0)))
11415 return (CC == X86::COND_E) ? FalseOp : TrueOp;
11419 // If this is a select between two integer constants, try to do some
11420 // optimizations. Note that the operands are ordered the opposite of SELECT
11422 if (ConstantSDNode *TrueC = dyn_cast<ConstantSDNode>(TrueOp)) {
11423 if (ConstantSDNode *FalseC = dyn_cast<ConstantSDNode>(FalseOp)) {
11424 // Canonicalize the TrueC/FalseC values so that TrueC (the true value) is
11425 // larger than FalseC (the false value).
11426 if (TrueC->getAPIntValue().ult(FalseC->getAPIntValue())) {
11427 CC = X86::GetOppositeBranchCondition(CC);
11428 std::swap(TrueC, FalseC);
11431 // Optimize C ? 8 : 0 -> zext(setcc(C)) << 3. Likewise for any pow2/0.
11432 // This is efficient for any integer data type (including i8/i16) and
11434 if (FalseC->getAPIntValue() == 0 && TrueC->getAPIntValue().isPowerOf2()) {
11435 Cond = DAG.getNode(X86ISD::SETCC, DL, MVT::i8,
11436 DAG.getConstant(CC, MVT::i8), Cond);
11438 // Zero extend the condition if needed.
11439 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, TrueC->getValueType(0), Cond);
11441 unsigned ShAmt = TrueC->getAPIntValue().logBase2();
11442 Cond = DAG.getNode(ISD::SHL, DL, Cond.getValueType(), Cond,
11443 DAG.getConstant(ShAmt, MVT::i8));
11444 if (N->getNumValues() == 2) // Dead flag value?
11445 return DCI.CombineTo(N, Cond, SDValue());
11449 // Optimize Cond ? cst+1 : cst -> zext(setcc(C)+cst. This is efficient
11450 // for any integer data type, including i8/i16.
11451 if (FalseC->getAPIntValue()+1 == TrueC->getAPIntValue()) {
11452 Cond = DAG.getNode(X86ISD::SETCC, DL, MVT::i8,
11453 DAG.getConstant(CC, MVT::i8), Cond);
11455 // Zero extend the condition if needed.
11456 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL,
11457 FalseC->getValueType(0), Cond);
11458 Cond = DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond,
11459 SDValue(FalseC, 0));
11461 if (N->getNumValues() == 2) // Dead flag value?
11462 return DCI.CombineTo(N, Cond, SDValue());
11466 // Optimize cases that will turn into an LEA instruction. This requires
11467 // an i32 or i64 and an efficient multiplier (1, 2, 3, 4, 5, 8, 9).
11468 if (N->getValueType(0) == MVT::i32 || N->getValueType(0) == MVT::i64) {
11469 uint64_t Diff = TrueC->getZExtValue()-FalseC->getZExtValue();
11470 if (N->getValueType(0) == MVT::i32) Diff = (unsigned)Diff;
11472 bool isFastMultiplier = false;
11474 switch ((unsigned char)Diff) {
11476 case 1: // result = add base, cond
11477 case 2: // result = lea base( , cond*2)
11478 case 3: // result = lea base(cond, cond*2)
11479 case 4: // result = lea base( , cond*4)
11480 case 5: // result = lea base(cond, cond*4)
11481 case 8: // result = lea base( , cond*8)
11482 case 9: // result = lea base(cond, cond*8)
11483 isFastMultiplier = true;
11488 if (isFastMultiplier) {
11489 APInt Diff = TrueC->getAPIntValue()-FalseC->getAPIntValue();
11490 Cond = DAG.getNode(X86ISD::SETCC, DL, MVT::i8,
11491 DAG.getConstant(CC, MVT::i8), Cond);
11492 // Zero extend the condition if needed.
11493 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, FalseC->getValueType(0),
11495 // Scale the condition by the difference.
11497 Cond = DAG.getNode(ISD::MUL, DL, Cond.getValueType(), Cond,
11498 DAG.getConstant(Diff, Cond.getValueType()));
11500 // Add the base if non-zero.
11501 if (FalseC->getAPIntValue() != 0)
11502 Cond = DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond,
11503 SDValue(FalseC, 0));
11504 if (N->getNumValues() == 2) // Dead flag value?
11505 return DCI.CombineTo(N, Cond, SDValue());
11515 /// PerformMulCombine - Optimize a single multiply with constant into two
11516 /// in order to implement it with two cheaper instructions, e.g.
11517 /// LEA + SHL, LEA + LEA.
11518 static SDValue PerformMulCombine(SDNode *N, SelectionDAG &DAG,
11519 TargetLowering::DAGCombinerInfo &DCI) {
11520 if (DCI.isBeforeLegalize() || DCI.isCalledByLegalizer())
11523 EVT VT = N->getValueType(0);
11524 if (VT != MVT::i64)
11527 ConstantSDNode *C = dyn_cast<ConstantSDNode>(N->getOperand(1));
11530 uint64_t MulAmt = C->getZExtValue();
11531 if (isPowerOf2_64(MulAmt) || MulAmt == 3 || MulAmt == 5 || MulAmt == 9)
11534 uint64_t MulAmt1 = 0;
11535 uint64_t MulAmt2 = 0;
11536 if ((MulAmt % 9) == 0) {
11538 MulAmt2 = MulAmt / 9;
11539 } else if ((MulAmt % 5) == 0) {
11541 MulAmt2 = MulAmt / 5;
11542 } else if ((MulAmt % 3) == 0) {
11544 MulAmt2 = MulAmt / 3;
11547 (isPowerOf2_64(MulAmt2) || MulAmt2 == 3 || MulAmt2 == 5 || MulAmt2 == 9)){
11548 DebugLoc DL = N->getDebugLoc();
11550 if (isPowerOf2_64(MulAmt2) &&
11551 !(N->hasOneUse() && N->use_begin()->getOpcode() == ISD::ADD))
11552 // If second multiplifer is pow2, issue it first. We want the multiply by
11553 // 3, 5, or 9 to be folded into the addressing mode unless the lone use
11555 std::swap(MulAmt1, MulAmt2);
11558 if (isPowerOf2_64(MulAmt1))
11559 NewMul = DAG.getNode(ISD::SHL, DL, VT, N->getOperand(0),
11560 DAG.getConstant(Log2_64(MulAmt1), MVT::i8));
11562 NewMul = DAG.getNode(X86ISD::MUL_IMM, DL, VT, N->getOperand(0),
11563 DAG.getConstant(MulAmt1, VT));
11565 if (isPowerOf2_64(MulAmt2))
11566 NewMul = DAG.getNode(ISD::SHL, DL, VT, NewMul,
11567 DAG.getConstant(Log2_64(MulAmt2), MVT::i8));
11569 NewMul = DAG.getNode(X86ISD::MUL_IMM, DL, VT, NewMul,
11570 DAG.getConstant(MulAmt2, VT));
11572 // Do not add new nodes to DAG combiner worklist.
11573 DCI.CombineTo(N, NewMul, false);
11578 static SDValue PerformSHLCombine(SDNode *N, SelectionDAG &DAG) {
11579 SDValue N0 = N->getOperand(0);
11580 SDValue N1 = N->getOperand(1);
11581 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1);
11582 EVT VT = N0.getValueType();
11584 // fold (shl (and (setcc_c), c1), c2) -> (and setcc_c, (c1 << c2))
11585 // since the result of setcc_c is all zero's or all ones.
11586 if (N1C && N0.getOpcode() == ISD::AND &&
11587 N0.getOperand(1).getOpcode() == ISD::Constant) {
11588 SDValue N00 = N0.getOperand(0);
11589 if (N00.getOpcode() == X86ISD::SETCC_CARRY ||
11590 ((N00.getOpcode() == ISD::ANY_EXTEND ||
11591 N00.getOpcode() == ISD::ZERO_EXTEND) &&
11592 N00.getOperand(0).getOpcode() == X86ISD::SETCC_CARRY)) {
11593 APInt Mask = cast<ConstantSDNode>(N0.getOperand(1))->getAPIntValue();
11594 APInt ShAmt = N1C->getAPIntValue();
11595 Mask = Mask.shl(ShAmt);
11597 return DAG.getNode(ISD::AND, N->getDebugLoc(), VT,
11598 N00, DAG.getConstant(Mask, VT));
11605 /// PerformShiftCombine - Transforms vector shift nodes to use vector shifts
11607 static SDValue PerformShiftCombine(SDNode* N, SelectionDAG &DAG,
11608 const X86Subtarget *Subtarget) {
11609 EVT VT = N->getValueType(0);
11610 if (!VT.isVector() && VT.isInteger() &&
11611 N->getOpcode() == ISD::SHL)
11612 return PerformSHLCombine(N, DAG);
11614 // On X86 with SSE2 support, we can transform this to a vector shift if
11615 // all elements are shifted by the same amount. We can't do this in legalize
11616 // because the a constant vector is typically transformed to a constant pool
11617 // so we have no knowledge of the shift amount.
11618 if (!Subtarget->hasSSE2())
11621 if (VT != MVT::v2i64 && VT != MVT::v4i32 && VT != MVT::v8i16)
11624 SDValue ShAmtOp = N->getOperand(1);
11625 EVT EltVT = VT.getVectorElementType();
11626 DebugLoc DL = N->getDebugLoc();
11627 SDValue BaseShAmt = SDValue();
11628 if (ShAmtOp.getOpcode() == ISD::BUILD_VECTOR) {
11629 unsigned NumElts = VT.getVectorNumElements();
11631 for (; i != NumElts; ++i) {
11632 SDValue Arg = ShAmtOp.getOperand(i);
11633 if (Arg.getOpcode() == ISD::UNDEF) continue;
11637 for (; i != NumElts; ++i) {
11638 SDValue Arg = ShAmtOp.getOperand(i);
11639 if (Arg.getOpcode() == ISD::UNDEF) continue;
11640 if (Arg != BaseShAmt) {
11644 } else if (ShAmtOp.getOpcode() == ISD::VECTOR_SHUFFLE &&
11645 cast<ShuffleVectorSDNode>(ShAmtOp)->isSplat()) {
11646 SDValue InVec = ShAmtOp.getOperand(0);
11647 if (InVec.getOpcode() == ISD::BUILD_VECTOR) {
11648 unsigned NumElts = InVec.getValueType().getVectorNumElements();
11650 for (; i != NumElts; ++i) {
11651 SDValue Arg = InVec.getOperand(i);
11652 if (Arg.getOpcode() == ISD::UNDEF) continue;
11656 } else if (InVec.getOpcode() == ISD::INSERT_VECTOR_ELT) {
11657 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(InVec.getOperand(2))) {
11658 unsigned SplatIdx= cast<ShuffleVectorSDNode>(ShAmtOp)->getSplatIndex();
11659 if (C->getZExtValue() == SplatIdx)
11660 BaseShAmt = InVec.getOperand(1);
11663 if (BaseShAmt.getNode() == 0)
11664 BaseShAmt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, EltVT, ShAmtOp,
11665 DAG.getIntPtrConstant(0));
11669 // The shift amount is an i32.
11670 if (EltVT.bitsGT(MVT::i32))
11671 BaseShAmt = DAG.getNode(ISD::TRUNCATE, DL, MVT::i32, BaseShAmt);
11672 else if (EltVT.bitsLT(MVT::i32))
11673 BaseShAmt = DAG.getNode(ISD::ZERO_EXTEND, DL, MVT::i32, BaseShAmt);
11675 // The shift amount is identical so we can do a vector shift.
11676 SDValue ValOp = N->getOperand(0);
11677 switch (N->getOpcode()) {
11679 llvm_unreachable("Unknown shift opcode!");
11682 if (VT == MVT::v2i64)
11683 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
11684 DAG.getConstant(Intrinsic::x86_sse2_pslli_q, MVT::i32),
11686 if (VT == MVT::v4i32)
11687 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
11688 DAG.getConstant(Intrinsic::x86_sse2_pslli_d, MVT::i32),
11690 if (VT == MVT::v8i16)
11691 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
11692 DAG.getConstant(Intrinsic::x86_sse2_pslli_w, MVT::i32),
11696 if (VT == MVT::v4i32)
11697 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
11698 DAG.getConstant(Intrinsic::x86_sse2_psrai_d, MVT::i32),
11700 if (VT == MVT::v8i16)
11701 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
11702 DAG.getConstant(Intrinsic::x86_sse2_psrai_w, MVT::i32),
11706 if (VT == MVT::v2i64)
11707 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
11708 DAG.getConstant(Intrinsic::x86_sse2_psrli_q, MVT::i32),
11710 if (VT == MVT::v4i32)
11711 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
11712 DAG.getConstant(Intrinsic::x86_sse2_psrli_d, MVT::i32),
11714 if (VT == MVT::v8i16)
11715 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
11716 DAG.getConstant(Intrinsic::x86_sse2_psrli_w, MVT::i32),
11724 // CMPEQCombine - Recognize the distinctive (AND (setcc ...) (setcc ..))
11725 // where both setccs reference the same FP CMP, and rewrite for CMPEQSS
11726 // and friends. Likewise for OR -> CMPNEQSS.
11727 static SDValue CMPEQCombine(SDNode *N, SelectionDAG &DAG,
11728 TargetLowering::DAGCombinerInfo &DCI,
11729 const X86Subtarget *Subtarget) {
11732 // SSE1 supports CMP{eq|ne}SS, and SSE2 added CMP{eq|ne}SD, but
11733 // we're requiring SSE2 for both.
11734 if (Subtarget->hasSSE2() && isAndOrOfSetCCs(SDValue(N, 0U), opcode)) {
11735 SDValue N0 = N->getOperand(0);
11736 SDValue N1 = N->getOperand(1);
11737 SDValue CMP0 = N0->getOperand(1);
11738 SDValue CMP1 = N1->getOperand(1);
11739 DebugLoc DL = N->getDebugLoc();
11741 // The SETCCs should both refer to the same CMP.
11742 if (CMP0.getOpcode() != X86ISD::CMP || CMP0 != CMP1)
11745 SDValue CMP00 = CMP0->getOperand(0);
11746 SDValue CMP01 = CMP0->getOperand(1);
11747 EVT VT = CMP00.getValueType();
11749 if (VT == MVT::f32 || VT == MVT::f64) {
11750 bool ExpectingFlags = false;
11751 // Check for any users that want flags:
11752 for (SDNode::use_iterator UI = N->use_begin(),
11754 !ExpectingFlags && UI != UE; ++UI)
11755 switch (UI->getOpcode()) {
11760 ExpectingFlags = true;
11762 case ISD::CopyToReg:
11763 case ISD::SIGN_EXTEND:
11764 case ISD::ZERO_EXTEND:
11765 case ISD::ANY_EXTEND:
11769 if (!ExpectingFlags) {
11770 enum X86::CondCode cc0 = (enum X86::CondCode)N0.getConstantOperandVal(0);
11771 enum X86::CondCode cc1 = (enum X86::CondCode)N1.getConstantOperandVal(0);
11773 if (cc1 == X86::COND_E || cc1 == X86::COND_NE) {
11774 X86::CondCode tmp = cc0;
11779 if ((cc0 == X86::COND_E && cc1 == X86::COND_NP) ||
11780 (cc0 == X86::COND_NE && cc1 == X86::COND_P)) {
11781 bool is64BitFP = (CMP00.getValueType() == MVT::f64);
11782 X86ISD::NodeType NTOperator = is64BitFP ?
11783 X86ISD::FSETCCsd : X86ISD::FSETCCss;
11784 // FIXME: need symbolic constants for these magic numbers.
11785 // See X86ATTInstPrinter.cpp:printSSECC().
11786 unsigned x86cc = (cc0 == X86::COND_E) ? 0 : 4;
11787 SDValue OnesOrZeroesF = DAG.getNode(NTOperator, DL, MVT::f32, CMP00, CMP01,
11788 DAG.getConstant(x86cc, MVT::i8));
11789 SDValue OnesOrZeroesI = DAG.getNode(ISD::BITCAST, DL, MVT::i32,
11791 SDValue ANDed = DAG.getNode(ISD::AND, DL, MVT::i32, OnesOrZeroesI,
11792 DAG.getConstant(1, MVT::i32));
11793 SDValue OneBitOfTruth = DAG.getNode(ISD::TRUNCATE, DL, MVT::i8, ANDed);
11794 return OneBitOfTruth;
11802 static SDValue PerformAndCombine(SDNode *N, SelectionDAG &DAG,
11803 TargetLowering::DAGCombinerInfo &DCI,
11804 const X86Subtarget *Subtarget) {
11805 if (DCI.isBeforeLegalizeOps())
11808 SDValue R = CMPEQCombine(N, DAG, DCI, Subtarget);
11812 // Want to form PANDN nodes, in the hopes of then easily combining them with
11813 // OR and AND nodes to form PBLEND/PSIGN.
11814 EVT VT = N->getValueType(0);
11815 if (VT != MVT::v2i64)
11818 SDValue N0 = N->getOperand(0);
11819 SDValue N1 = N->getOperand(1);
11820 DebugLoc DL = N->getDebugLoc();
11822 // Check LHS for vnot
11823 if (N0.getOpcode() == ISD::XOR &&
11824 ISD::isBuildVectorAllOnes(N0.getOperand(1).getNode()))
11825 return DAG.getNode(X86ISD::PANDN, DL, VT, N0.getOperand(0), N1);
11827 // Check RHS for vnot
11828 if (N1.getOpcode() == ISD::XOR &&
11829 ISD::isBuildVectorAllOnes(N1.getOperand(1).getNode()))
11830 return DAG.getNode(X86ISD::PANDN, DL, VT, N1.getOperand(0), N0);
11835 static SDValue PerformOrCombine(SDNode *N, SelectionDAG &DAG,
11836 TargetLowering::DAGCombinerInfo &DCI,
11837 const X86Subtarget *Subtarget) {
11838 if (DCI.isBeforeLegalizeOps())
11841 SDValue R = CMPEQCombine(N, DAG, DCI, Subtarget);
11845 EVT VT = N->getValueType(0);
11846 if (VT != MVT::i16 && VT != MVT::i32 && VT != MVT::i64 && VT != MVT::v2i64)
11849 SDValue N0 = N->getOperand(0);
11850 SDValue N1 = N->getOperand(1);
11852 // look for psign/blend
11853 if (Subtarget->hasSSSE3()) {
11854 if (VT == MVT::v2i64) {
11855 // Canonicalize pandn to RHS
11856 if (N0.getOpcode() == X86ISD::PANDN)
11858 // or (and (m, x), (pandn m, y))
11859 if (N0.getOpcode() == ISD::AND && N1.getOpcode() == X86ISD::PANDN) {
11860 SDValue Mask = N1.getOperand(0);
11861 SDValue X = N1.getOperand(1);
11863 if (N0.getOperand(0) == Mask)
11864 Y = N0.getOperand(1);
11865 if (N0.getOperand(1) == Mask)
11866 Y = N0.getOperand(0);
11868 // Check to see if the mask appeared in both the AND and PANDN and
11872 // Validate that X, Y, and Mask are BIT_CONVERTS, and see through them.
11873 if (Mask.getOpcode() != ISD::BITCAST ||
11874 X.getOpcode() != ISD::BITCAST ||
11875 Y.getOpcode() != ISD::BITCAST)
11878 // Look through mask bitcast.
11879 Mask = Mask.getOperand(0);
11880 EVT MaskVT = Mask.getValueType();
11882 // Validate that the Mask operand is a vector sra node. The sra node
11883 // will be an intrinsic.
11884 if (Mask.getOpcode() != ISD::INTRINSIC_WO_CHAIN)
11887 // FIXME: what to do for bytes, since there is a psignb/pblendvb, but
11888 // there is no psrai.b
11889 switch (cast<ConstantSDNode>(Mask.getOperand(0))->getZExtValue()) {
11890 case Intrinsic::x86_sse2_psrai_w:
11891 case Intrinsic::x86_sse2_psrai_d:
11893 default: return SDValue();
11896 // Check that the SRA is all signbits.
11897 SDValue SraC = Mask.getOperand(2);
11898 unsigned SraAmt = cast<ConstantSDNode>(SraC)->getZExtValue();
11899 unsigned EltBits = MaskVT.getVectorElementType().getSizeInBits();
11900 if ((SraAmt + 1) != EltBits)
11903 DebugLoc DL = N->getDebugLoc();
11905 // Now we know we at least have a plendvb with the mask val. See if
11906 // we can form a psignb/w/d.
11907 // psign = x.type == y.type == mask.type && y = sub(0, x);
11908 X = X.getOperand(0);
11909 Y = Y.getOperand(0);
11910 if (Y.getOpcode() == ISD::SUB && Y.getOperand(1) == X &&
11911 ISD::isBuildVectorAllZeros(Y.getOperand(0).getNode()) &&
11912 X.getValueType() == MaskVT && X.getValueType() == Y.getValueType()){
11915 case 8: Opc = X86ISD::PSIGNB; break;
11916 case 16: Opc = X86ISD::PSIGNW; break;
11917 case 32: Opc = X86ISD::PSIGND; break;
11921 SDValue Sign = DAG.getNode(Opc, DL, MaskVT, X, Mask.getOperand(1));
11922 return DAG.getNode(ISD::BITCAST, DL, MVT::v2i64, Sign);
11925 // PBLENDVB only available on SSE 4.1
11926 if (!Subtarget->hasSSE41())
11929 X = DAG.getNode(ISD::BITCAST, DL, MVT::v16i8, X);
11930 Y = DAG.getNode(ISD::BITCAST, DL, MVT::v16i8, Y);
11931 Mask = DAG.getNode(ISD::BITCAST, DL, MVT::v16i8, Mask);
11932 Mask = DAG.getNode(X86ISD::PBLENDVB, DL, MVT::v16i8, X, Y, Mask);
11933 return DAG.getNode(ISD::BITCAST, DL, MVT::v2i64, Mask);
11938 // fold (or (x << c) | (y >> (64 - c))) ==> (shld64 x, y, c)
11939 if (N0.getOpcode() == ISD::SRL && N1.getOpcode() == ISD::SHL)
11941 if (N0.getOpcode() != ISD::SHL || N1.getOpcode() != ISD::SRL)
11943 if (!N0.hasOneUse() || !N1.hasOneUse())
11946 SDValue ShAmt0 = N0.getOperand(1);
11947 if (ShAmt0.getValueType() != MVT::i8)
11949 SDValue ShAmt1 = N1.getOperand(1);
11950 if (ShAmt1.getValueType() != MVT::i8)
11952 if (ShAmt0.getOpcode() == ISD::TRUNCATE)
11953 ShAmt0 = ShAmt0.getOperand(0);
11954 if (ShAmt1.getOpcode() == ISD::TRUNCATE)
11955 ShAmt1 = ShAmt1.getOperand(0);
11957 DebugLoc DL = N->getDebugLoc();
11958 unsigned Opc = X86ISD::SHLD;
11959 SDValue Op0 = N0.getOperand(0);
11960 SDValue Op1 = N1.getOperand(0);
11961 if (ShAmt0.getOpcode() == ISD::SUB) {
11962 Opc = X86ISD::SHRD;
11963 std::swap(Op0, Op1);
11964 std::swap(ShAmt0, ShAmt1);
11967 unsigned Bits = VT.getSizeInBits();
11968 if (ShAmt1.getOpcode() == ISD::SUB) {
11969 SDValue Sum = ShAmt1.getOperand(0);
11970 if (ConstantSDNode *SumC = dyn_cast<ConstantSDNode>(Sum)) {
11971 SDValue ShAmt1Op1 = ShAmt1.getOperand(1);
11972 if (ShAmt1Op1.getNode()->getOpcode() == ISD::TRUNCATE)
11973 ShAmt1Op1 = ShAmt1Op1.getOperand(0);
11974 if (SumC->getSExtValue() == Bits && ShAmt1Op1 == ShAmt0)
11975 return DAG.getNode(Opc, DL, VT,
11977 DAG.getNode(ISD::TRUNCATE, DL,
11980 } else if (ConstantSDNode *ShAmt1C = dyn_cast<ConstantSDNode>(ShAmt1)) {
11981 ConstantSDNode *ShAmt0C = dyn_cast<ConstantSDNode>(ShAmt0);
11983 ShAmt0C->getSExtValue() + ShAmt1C->getSExtValue() == Bits)
11984 return DAG.getNode(Opc, DL, VT,
11985 N0.getOperand(0), N1.getOperand(0),
11986 DAG.getNode(ISD::TRUNCATE, DL,
11993 /// PerformSTORECombine - Do target-specific dag combines on STORE nodes.
11994 static SDValue PerformSTORECombine(SDNode *N, SelectionDAG &DAG,
11995 const X86Subtarget *Subtarget) {
11996 // Turn load->store of MMX types into GPR load/stores. This avoids clobbering
11997 // the FP state in cases where an emms may be missing.
11998 // A preferable solution to the general problem is to figure out the right
11999 // places to insert EMMS. This qualifies as a quick hack.
12001 // Similarly, turn load->store of i64 into double load/stores in 32-bit mode.
12002 StoreSDNode *St = cast<StoreSDNode>(N);
12003 EVT VT = St->getValue().getValueType();
12004 if (VT.getSizeInBits() != 64)
12007 const Function *F = DAG.getMachineFunction().getFunction();
12008 bool NoImplicitFloatOps = F->hasFnAttr(Attribute::NoImplicitFloat);
12009 bool F64IsLegal = !UseSoftFloat && !NoImplicitFloatOps
12010 && Subtarget->hasSSE2();
12011 if ((VT.isVector() ||
12012 (VT == MVT::i64 && F64IsLegal && !Subtarget->is64Bit())) &&
12013 isa<LoadSDNode>(St->getValue()) &&
12014 !cast<LoadSDNode>(St->getValue())->isVolatile() &&
12015 St->getChain().hasOneUse() && !St->isVolatile()) {
12016 SDNode* LdVal = St->getValue().getNode();
12017 LoadSDNode *Ld = 0;
12018 int TokenFactorIndex = -1;
12019 SmallVector<SDValue, 8> Ops;
12020 SDNode* ChainVal = St->getChain().getNode();
12021 // Must be a store of a load. We currently handle two cases: the load
12022 // is a direct child, and it's under an intervening TokenFactor. It is
12023 // possible to dig deeper under nested TokenFactors.
12024 if (ChainVal == LdVal)
12025 Ld = cast<LoadSDNode>(St->getChain());
12026 else if (St->getValue().hasOneUse() &&
12027 ChainVal->getOpcode() == ISD::TokenFactor) {
12028 for (unsigned i=0, e = ChainVal->getNumOperands(); i != e; ++i) {
12029 if (ChainVal->getOperand(i).getNode() == LdVal) {
12030 TokenFactorIndex = i;
12031 Ld = cast<LoadSDNode>(St->getValue());
12033 Ops.push_back(ChainVal->getOperand(i));
12037 if (!Ld || !ISD::isNormalLoad(Ld))
12040 // If this is not the MMX case, i.e. we are just turning i64 load/store
12041 // into f64 load/store, avoid the transformation if there are multiple
12042 // uses of the loaded value.
12043 if (!VT.isVector() && !Ld->hasNUsesOfValue(1, 0))
12046 DebugLoc LdDL = Ld->getDebugLoc();
12047 DebugLoc StDL = N->getDebugLoc();
12048 // If we are a 64-bit capable x86, lower to a single movq load/store pair.
12049 // Otherwise, if it's legal to use f64 SSE instructions, use f64 load/store
12051 if (Subtarget->is64Bit() || F64IsLegal) {
12052 EVT LdVT = Subtarget->is64Bit() ? MVT::i64 : MVT::f64;
12053 SDValue NewLd = DAG.getLoad(LdVT, LdDL, Ld->getChain(), Ld->getBasePtr(),
12054 Ld->getPointerInfo(), Ld->isVolatile(),
12055 Ld->isNonTemporal(), Ld->getAlignment());
12056 SDValue NewChain = NewLd.getValue(1);
12057 if (TokenFactorIndex != -1) {
12058 Ops.push_back(NewChain);
12059 NewChain = DAG.getNode(ISD::TokenFactor, LdDL, MVT::Other, &Ops[0],
12062 return DAG.getStore(NewChain, StDL, NewLd, St->getBasePtr(),
12063 St->getPointerInfo(),
12064 St->isVolatile(), St->isNonTemporal(),
12065 St->getAlignment());
12068 // Otherwise, lower to two pairs of 32-bit loads / stores.
12069 SDValue LoAddr = Ld->getBasePtr();
12070 SDValue HiAddr = DAG.getNode(ISD::ADD, LdDL, MVT::i32, LoAddr,
12071 DAG.getConstant(4, MVT::i32));
12073 SDValue LoLd = DAG.getLoad(MVT::i32, LdDL, Ld->getChain(), LoAddr,
12074 Ld->getPointerInfo(),
12075 Ld->isVolatile(), Ld->isNonTemporal(),
12076 Ld->getAlignment());
12077 SDValue HiLd = DAG.getLoad(MVT::i32, LdDL, Ld->getChain(), HiAddr,
12078 Ld->getPointerInfo().getWithOffset(4),
12079 Ld->isVolatile(), Ld->isNonTemporal(),
12080 MinAlign(Ld->getAlignment(), 4));
12082 SDValue NewChain = LoLd.getValue(1);
12083 if (TokenFactorIndex != -1) {
12084 Ops.push_back(LoLd);
12085 Ops.push_back(HiLd);
12086 NewChain = DAG.getNode(ISD::TokenFactor, LdDL, MVT::Other, &Ops[0],
12090 LoAddr = St->getBasePtr();
12091 HiAddr = DAG.getNode(ISD::ADD, StDL, MVT::i32, LoAddr,
12092 DAG.getConstant(4, MVT::i32));
12094 SDValue LoSt = DAG.getStore(NewChain, StDL, LoLd, LoAddr,
12095 St->getPointerInfo(),
12096 St->isVolatile(), St->isNonTemporal(),
12097 St->getAlignment());
12098 SDValue HiSt = DAG.getStore(NewChain, StDL, HiLd, HiAddr,
12099 St->getPointerInfo().getWithOffset(4),
12101 St->isNonTemporal(),
12102 MinAlign(St->getAlignment(), 4));
12103 return DAG.getNode(ISD::TokenFactor, StDL, MVT::Other, LoSt, HiSt);
12108 /// PerformFORCombine - Do target-specific dag combines on X86ISD::FOR and
12109 /// X86ISD::FXOR nodes.
12110 static SDValue PerformFORCombine(SDNode *N, SelectionDAG &DAG) {
12111 assert(N->getOpcode() == X86ISD::FOR || N->getOpcode() == X86ISD::FXOR);
12112 // F[X]OR(0.0, x) -> x
12113 // F[X]OR(x, 0.0) -> x
12114 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(0)))
12115 if (C->getValueAPF().isPosZero())
12116 return N->getOperand(1);
12117 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(1)))
12118 if (C->getValueAPF().isPosZero())
12119 return N->getOperand(0);
12123 /// PerformFANDCombine - Do target-specific dag combines on X86ISD::FAND nodes.
12124 static SDValue PerformFANDCombine(SDNode *N, SelectionDAG &DAG) {
12125 // FAND(0.0, x) -> 0.0
12126 // FAND(x, 0.0) -> 0.0
12127 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(0)))
12128 if (C->getValueAPF().isPosZero())
12129 return N->getOperand(0);
12130 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(1)))
12131 if (C->getValueAPF().isPosZero())
12132 return N->getOperand(1);
12136 static SDValue PerformBTCombine(SDNode *N,
12138 TargetLowering::DAGCombinerInfo &DCI) {
12139 // BT ignores high bits in the bit index operand.
12140 SDValue Op1 = N->getOperand(1);
12141 if (Op1.hasOneUse()) {
12142 unsigned BitWidth = Op1.getValueSizeInBits();
12143 APInt DemandedMask = APInt::getLowBitsSet(BitWidth, Log2_32(BitWidth));
12144 APInt KnownZero, KnownOne;
12145 TargetLowering::TargetLoweringOpt TLO(DAG, !DCI.isBeforeLegalize(),
12146 !DCI.isBeforeLegalizeOps());
12147 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
12148 if (TLO.ShrinkDemandedConstant(Op1, DemandedMask) ||
12149 TLI.SimplifyDemandedBits(Op1, DemandedMask, KnownZero, KnownOne, TLO))
12150 DCI.CommitTargetLoweringOpt(TLO);
12155 static SDValue PerformVZEXT_MOVLCombine(SDNode *N, SelectionDAG &DAG) {
12156 SDValue Op = N->getOperand(0);
12157 if (Op.getOpcode() == ISD::BITCAST)
12158 Op = Op.getOperand(0);
12159 EVT VT = N->getValueType(0), OpVT = Op.getValueType();
12160 if (Op.getOpcode() == X86ISD::VZEXT_LOAD &&
12161 VT.getVectorElementType().getSizeInBits() ==
12162 OpVT.getVectorElementType().getSizeInBits()) {
12163 return DAG.getNode(ISD::BITCAST, N->getDebugLoc(), VT, Op);
12168 static SDValue PerformZExtCombine(SDNode *N, SelectionDAG &DAG) {
12169 // (i32 zext (and (i8 x86isd::setcc_carry), 1)) ->
12170 // (and (i32 x86isd::setcc_carry), 1)
12171 // This eliminates the zext. This transformation is necessary because
12172 // ISD::SETCC is always legalized to i8.
12173 DebugLoc dl = N->getDebugLoc();
12174 SDValue N0 = N->getOperand(0);
12175 EVT VT = N->getValueType(0);
12176 if (N0.getOpcode() == ISD::AND &&
12178 N0.getOperand(0).hasOneUse()) {
12179 SDValue N00 = N0.getOperand(0);
12180 if (N00.getOpcode() != X86ISD::SETCC_CARRY)
12182 ConstantSDNode *C = dyn_cast<ConstantSDNode>(N0.getOperand(1));
12183 if (!C || C->getZExtValue() != 1)
12185 return DAG.getNode(ISD::AND, dl, VT,
12186 DAG.getNode(X86ISD::SETCC_CARRY, dl, VT,
12187 N00.getOperand(0), N00.getOperand(1)),
12188 DAG.getConstant(1, VT));
12194 // Optimize RES = X86ISD::SETCC CONDCODE, EFLAG_INPUT
12195 static SDValue PerformSETCCCombine(SDNode *N, SelectionDAG &DAG) {
12196 unsigned X86CC = N->getConstantOperandVal(0);
12197 SDValue EFLAG = N->getOperand(1);
12198 DebugLoc DL = N->getDebugLoc();
12200 // Materialize "setb reg" as "sbb reg,reg", since it can be extended without
12201 // a zext and produces an all-ones bit which is more useful than 0/1 in some
12203 if (X86CC == X86::COND_B)
12204 return DAG.getNode(ISD::AND, DL, MVT::i8,
12205 DAG.getNode(X86ISD::SETCC_CARRY, DL, MVT::i8,
12206 DAG.getConstant(X86CC, MVT::i8), EFLAG),
12207 DAG.getConstant(1, MVT::i8));
12212 static SDValue PerformSINT_TO_FPCombine(SDNode *N, SelectionDAG &DAG,
12213 const X86TargetLowering *XTLI) {
12214 SDValue Op0 = N->getOperand(0);
12215 // Transform (SINT_TO_FP (i64 ...)) into an x87 operation if we have
12216 // a 32-bit target where SSE doesn't support i64->FP operations.
12217 if (Op0.getOpcode() == ISD::LOAD) {
12218 LoadSDNode *Ld = cast<LoadSDNode>(Op0.getNode());
12219 EVT VT = Ld->getValueType(0);
12220 if (!Ld->isVolatile() && !N->getValueType(0).isVector() &&
12221 ISD::isNON_EXTLoad(Op0.getNode()) && Op0.hasOneUse() &&
12222 !XTLI->getSubtarget()->is64Bit() &&
12223 !DAG.getTargetLoweringInfo().isTypeLegal(VT)) {
12224 SDValue FILDChain = XTLI->BuildFILD(SDValue(N, 0), Ld->getValueType(0),
12225 Ld->getChain(), Op0, DAG);
12226 DAG.ReplaceAllUsesOfValueWith(Op0.getValue(1), FILDChain.getValue(1));
12233 // Optimize RES, EFLAGS = X86ISD::ADC LHS, RHS, EFLAGS
12234 static SDValue PerformADCCombine(SDNode *N, SelectionDAG &DAG,
12235 X86TargetLowering::DAGCombinerInfo &DCI) {
12236 // If the LHS and RHS of the ADC node are zero, then it can't overflow and
12237 // the result is either zero or one (depending on the input carry bit).
12238 // Strength reduce this down to a "set on carry" aka SETCC_CARRY&1.
12239 if (X86::isZeroNode(N->getOperand(0)) &&
12240 X86::isZeroNode(N->getOperand(1)) &&
12241 // We don't have a good way to replace an EFLAGS use, so only do this when
12243 SDValue(N, 1).use_empty()) {
12244 DebugLoc DL = N->getDebugLoc();
12245 EVT VT = N->getValueType(0);
12246 SDValue CarryOut = DAG.getConstant(0, N->getValueType(1));
12247 SDValue Res1 = DAG.getNode(ISD::AND, DL, VT,
12248 DAG.getNode(X86ISD::SETCC_CARRY, DL, VT,
12249 DAG.getConstant(X86::COND_B,MVT::i8),
12251 DAG.getConstant(1, VT));
12252 return DCI.CombineTo(N, Res1, CarryOut);
12258 // fold (add Y, (sete X, 0)) -> adc 0, Y
12259 // (add Y, (setne X, 0)) -> sbb -1, Y
12260 // (sub (sete X, 0), Y) -> sbb 0, Y
12261 // (sub (setne X, 0), Y) -> adc -1, Y
12262 static SDValue OptimizeConditonalInDecrement(SDNode *N, SelectionDAG &DAG) {
12263 DebugLoc DL = N->getDebugLoc();
12265 // Look through ZExts.
12266 SDValue Ext = N->getOperand(N->getOpcode() == ISD::SUB ? 1 : 0);
12267 if (Ext.getOpcode() != ISD::ZERO_EXTEND || !Ext.hasOneUse())
12270 SDValue SetCC = Ext.getOperand(0);
12271 if (SetCC.getOpcode() != X86ISD::SETCC || !SetCC.hasOneUse())
12274 X86::CondCode CC = (X86::CondCode)SetCC.getConstantOperandVal(0);
12275 if (CC != X86::COND_E && CC != X86::COND_NE)
12278 SDValue Cmp = SetCC.getOperand(1);
12279 if (Cmp.getOpcode() != X86ISD::CMP || !Cmp.hasOneUse() ||
12280 !X86::isZeroNode(Cmp.getOperand(1)) ||
12281 !Cmp.getOperand(0).getValueType().isInteger())
12284 SDValue CmpOp0 = Cmp.getOperand(0);
12285 SDValue NewCmp = DAG.getNode(X86ISD::CMP, DL, MVT::i32, CmpOp0,
12286 DAG.getConstant(1, CmpOp0.getValueType()));
12288 SDValue OtherVal = N->getOperand(N->getOpcode() == ISD::SUB ? 0 : 1);
12289 if (CC == X86::COND_NE)
12290 return DAG.getNode(N->getOpcode() == ISD::SUB ? X86ISD::ADC : X86ISD::SBB,
12291 DL, OtherVal.getValueType(), OtherVal,
12292 DAG.getConstant(-1ULL, OtherVal.getValueType()), NewCmp);
12293 return DAG.getNode(N->getOpcode() == ISD::SUB ? X86ISD::SBB : X86ISD::ADC,
12294 DL, OtherVal.getValueType(), OtherVal,
12295 DAG.getConstant(0, OtherVal.getValueType()), NewCmp);
12298 SDValue X86TargetLowering::PerformDAGCombine(SDNode *N,
12299 DAGCombinerInfo &DCI) const {
12300 SelectionDAG &DAG = DCI.DAG;
12301 switch (N->getOpcode()) {
12303 case ISD::EXTRACT_VECTOR_ELT:
12304 return PerformEXTRACT_VECTOR_ELTCombine(N, DAG, *this);
12305 case ISD::SELECT: return PerformSELECTCombine(N, DAG, Subtarget);
12306 case X86ISD::CMOV: return PerformCMOVCombine(N, DAG, DCI);
12308 case ISD::SUB: return OptimizeConditonalInDecrement(N, DAG);
12309 case X86ISD::ADC: return PerformADCCombine(N, DAG, DCI);
12310 case ISD::MUL: return PerformMulCombine(N, DAG, DCI);
12313 case ISD::SRL: return PerformShiftCombine(N, DAG, Subtarget);
12314 case ISD::AND: return PerformAndCombine(N, DAG, DCI, Subtarget);
12315 case ISD::OR: return PerformOrCombine(N, DAG, DCI, Subtarget);
12316 case ISD::STORE: return PerformSTORECombine(N, DAG, Subtarget);
12317 case ISD::SINT_TO_FP: return PerformSINT_TO_FPCombine(N, DAG, this);
12319 case X86ISD::FOR: return PerformFORCombine(N, DAG);
12320 case X86ISD::FAND: return PerformFANDCombine(N, DAG);
12321 case X86ISD::BT: return PerformBTCombine(N, DAG, DCI);
12322 case X86ISD::VZEXT_MOVL: return PerformVZEXT_MOVLCombine(N, DAG);
12323 case ISD::ZERO_EXTEND: return PerformZExtCombine(N, DAG);
12324 case X86ISD::SETCC: return PerformSETCCCombine(N, DAG);
12325 case X86ISD::SHUFPS: // Handle all target specific shuffles
12326 case X86ISD::SHUFPD:
12327 case X86ISD::PALIGN:
12328 case X86ISD::PUNPCKHBW:
12329 case X86ISD::PUNPCKHWD:
12330 case X86ISD::PUNPCKHDQ:
12331 case X86ISD::PUNPCKHQDQ:
12332 case X86ISD::UNPCKHPS:
12333 case X86ISD::UNPCKHPD:
12334 case X86ISD::PUNPCKLBW:
12335 case X86ISD::PUNPCKLWD:
12336 case X86ISD::PUNPCKLDQ:
12337 case X86ISD::PUNPCKLQDQ:
12338 case X86ISD::UNPCKLPS:
12339 case X86ISD::UNPCKLPD:
12340 case X86ISD::VUNPCKLPS:
12341 case X86ISD::VUNPCKLPD:
12342 case X86ISD::VUNPCKLPSY:
12343 case X86ISD::VUNPCKLPDY:
12344 case X86ISD::MOVHLPS:
12345 case X86ISD::MOVLHPS:
12346 case X86ISD::PSHUFD:
12347 case X86ISD::PSHUFHW:
12348 case X86ISD::PSHUFLW:
12349 case X86ISD::MOVSS:
12350 case X86ISD::MOVSD:
12351 case ISD::VECTOR_SHUFFLE: return PerformShuffleCombine(N, DAG, DCI);
12357 /// isTypeDesirableForOp - Return true if the target has native support for
12358 /// the specified value type and it is 'desirable' to use the type for the
12359 /// given node type. e.g. On x86 i16 is legal, but undesirable since i16
12360 /// instruction encodings are longer and some i16 instructions are slow.
12361 bool X86TargetLowering::isTypeDesirableForOp(unsigned Opc, EVT VT) const {
12362 if (!isTypeLegal(VT))
12364 if (VT != MVT::i16)
12371 case ISD::SIGN_EXTEND:
12372 case ISD::ZERO_EXTEND:
12373 case ISD::ANY_EXTEND:
12386 /// IsDesirableToPromoteOp - This method query the target whether it is
12387 /// beneficial for dag combiner to promote the specified node. If true, it
12388 /// should return the desired promotion type by reference.
12389 bool X86TargetLowering::IsDesirableToPromoteOp(SDValue Op, EVT &PVT) const {
12390 EVT VT = Op.getValueType();
12391 if (VT != MVT::i16)
12394 bool Promote = false;
12395 bool Commute = false;
12396 switch (Op.getOpcode()) {
12399 LoadSDNode *LD = cast<LoadSDNode>(Op);
12400 // If the non-extending load has a single use and it's not live out, then it
12401 // might be folded.
12402 if (LD->getExtensionType() == ISD::NON_EXTLOAD /*&&
12403 Op.hasOneUse()*/) {
12404 for (SDNode::use_iterator UI = Op.getNode()->use_begin(),
12405 UE = Op.getNode()->use_end(); UI != UE; ++UI) {
12406 // The only case where we'd want to promote LOAD (rather then it being
12407 // promoted as an operand is when it's only use is liveout.
12408 if (UI->getOpcode() != ISD::CopyToReg)
12415 case ISD::SIGN_EXTEND:
12416 case ISD::ZERO_EXTEND:
12417 case ISD::ANY_EXTEND:
12422 SDValue N0 = Op.getOperand(0);
12423 // Look out for (store (shl (load), x)).
12424 if (MayFoldLoad(N0) && MayFoldIntoStore(Op))
12437 SDValue N0 = Op.getOperand(0);
12438 SDValue N1 = Op.getOperand(1);
12439 if (!Commute && MayFoldLoad(N1))
12441 // Avoid disabling potential load folding opportunities.
12442 if (MayFoldLoad(N0) && (!isa<ConstantSDNode>(N1) || MayFoldIntoStore(Op)))
12444 if (MayFoldLoad(N1) && (!isa<ConstantSDNode>(N0) || MayFoldIntoStore(Op)))
12454 //===----------------------------------------------------------------------===//
12455 // X86 Inline Assembly Support
12456 //===----------------------------------------------------------------------===//
12458 bool X86TargetLowering::ExpandInlineAsm(CallInst *CI) const {
12459 InlineAsm *IA = cast<InlineAsm>(CI->getCalledValue());
12461 std::string AsmStr = IA->getAsmString();
12463 // TODO: should remove alternatives from the asmstring: "foo {a|b}" -> "foo a"
12464 SmallVector<StringRef, 4> AsmPieces;
12465 SplitString(AsmStr, AsmPieces, ";\n");
12467 switch (AsmPieces.size()) {
12468 default: return false;
12470 AsmStr = AsmPieces[0];
12472 SplitString(AsmStr, AsmPieces, " \t"); // Split with whitespace.
12474 // FIXME: this should verify that we are targeting a 486 or better. If not,
12475 // we will turn this bswap into something that will be lowered to logical ops
12476 // instead of emitting the bswap asm. For now, we don't support 486 or lower
12477 // so don't worry about this.
12479 if (AsmPieces.size() == 2 &&
12480 (AsmPieces[0] == "bswap" ||
12481 AsmPieces[0] == "bswapq" ||
12482 AsmPieces[0] == "bswapl") &&
12483 (AsmPieces[1] == "$0" ||
12484 AsmPieces[1] == "${0:q}")) {
12485 // No need to check constraints, nothing other than the equivalent of
12486 // "=r,0" would be valid here.
12487 const IntegerType *Ty = dyn_cast<IntegerType>(CI->getType());
12488 if (!Ty || Ty->getBitWidth() % 16 != 0)
12490 return IntrinsicLowering::LowerToByteSwap(CI);
12492 // rorw $$8, ${0:w} --> llvm.bswap.i16
12493 if (CI->getType()->isIntegerTy(16) &&
12494 AsmPieces.size() == 3 &&
12495 (AsmPieces[0] == "rorw" || AsmPieces[0] == "rolw") &&
12496 AsmPieces[1] == "$$8," &&
12497 AsmPieces[2] == "${0:w}" &&
12498 IA->getConstraintString().compare(0, 5, "=r,0,") == 0) {
12500 const std::string &ConstraintsStr = IA->getConstraintString();
12501 SplitString(StringRef(ConstraintsStr).substr(5), AsmPieces, ",");
12502 std::sort(AsmPieces.begin(), AsmPieces.end());
12503 if (AsmPieces.size() == 4 &&
12504 AsmPieces[0] == "~{cc}" &&
12505 AsmPieces[1] == "~{dirflag}" &&
12506 AsmPieces[2] == "~{flags}" &&
12507 AsmPieces[3] == "~{fpsr}") {
12508 const IntegerType *Ty = dyn_cast<IntegerType>(CI->getType());
12509 if (!Ty || Ty->getBitWidth() % 16 != 0)
12511 return IntrinsicLowering::LowerToByteSwap(CI);
12516 if (CI->getType()->isIntegerTy(32) &&
12517 IA->getConstraintString().compare(0, 5, "=r,0,") == 0) {
12518 SmallVector<StringRef, 4> Words;
12519 SplitString(AsmPieces[0], Words, " \t,");
12520 if (Words.size() == 3 && Words[0] == "rorw" && Words[1] == "$$8" &&
12521 Words[2] == "${0:w}") {
12523 SplitString(AsmPieces[1], Words, " \t,");
12524 if (Words.size() == 3 && Words[0] == "rorl" && Words[1] == "$$16" &&
12525 Words[2] == "$0") {
12527 SplitString(AsmPieces[2], Words, " \t,");
12528 if (Words.size() == 3 && Words[0] == "rorw" && Words[1] == "$$8" &&
12529 Words[2] == "${0:w}") {
12531 const std::string &ConstraintsStr = IA->getConstraintString();
12532 SplitString(StringRef(ConstraintsStr).substr(5), AsmPieces, ",");
12533 std::sort(AsmPieces.begin(), AsmPieces.end());
12534 if (AsmPieces.size() == 4 &&
12535 AsmPieces[0] == "~{cc}" &&
12536 AsmPieces[1] == "~{dirflag}" &&
12537 AsmPieces[2] == "~{flags}" &&
12538 AsmPieces[3] == "~{fpsr}") {
12539 const IntegerType *Ty = dyn_cast<IntegerType>(CI->getType());
12540 if (!Ty || Ty->getBitWidth() % 16 != 0)
12542 return IntrinsicLowering::LowerToByteSwap(CI);
12549 if (CI->getType()->isIntegerTy(64)) {
12550 InlineAsm::ConstraintInfoVector Constraints = IA->ParseConstraints();
12551 if (Constraints.size() >= 2 &&
12552 Constraints[0].Codes.size() == 1 && Constraints[0].Codes[0] == "A" &&
12553 Constraints[1].Codes.size() == 1 && Constraints[1].Codes[0] == "0") {
12554 // bswap %eax / bswap %edx / xchgl %eax, %edx -> llvm.bswap.i64
12555 SmallVector<StringRef, 4> Words;
12556 SplitString(AsmPieces[0], Words, " \t");
12557 if (Words.size() == 2 && Words[0] == "bswap" && Words[1] == "%eax") {
12559 SplitString(AsmPieces[1], Words, " \t");
12560 if (Words.size() == 2 && Words[0] == "bswap" && Words[1] == "%edx") {
12562 SplitString(AsmPieces[2], Words, " \t,");
12563 if (Words.size() == 3 && Words[0] == "xchgl" && Words[1] == "%eax" &&
12564 Words[2] == "%edx") {
12565 const IntegerType *Ty = dyn_cast<IntegerType>(CI->getType());
12566 if (!Ty || Ty->getBitWidth() % 16 != 0)
12568 return IntrinsicLowering::LowerToByteSwap(CI);
12581 /// getConstraintType - Given a constraint letter, return the type of
12582 /// constraint it is for this target.
12583 X86TargetLowering::ConstraintType
12584 X86TargetLowering::getConstraintType(const std::string &Constraint) const {
12585 if (Constraint.size() == 1) {
12586 switch (Constraint[0]) {
12596 return C_RegisterClass;
12620 return TargetLowering::getConstraintType(Constraint);
12623 /// Examine constraint type and operand type and determine a weight value.
12624 /// This object must already have been set up with the operand type
12625 /// and the current alternative constraint selected.
12626 TargetLowering::ConstraintWeight
12627 X86TargetLowering::getSingleConstraintMatchWeight(
12628 AsmOperandInfo &info, const char *constraint) const {
12629 ConstraintWeight weight = CW_Invalid;
12630 Value *CallOperandVal = info.CallOperandVal;
12631 // If we don't have a value, we can't do a match,
12632 // but allow it at the lowest weight.
12633 if (CallOperandVal == NULL)
12635 const Type *type = CallOperandVal->getType();
12636 // Look at the constraint type.
12637 switch (*constraint) {
12639 weight = TargetLowering::getSingleConstraintMatchWeight(info, constraint);
12650 if (CallOperandVal->getType()->isIntegerTy())
12651 weight = CW_SpecificReg;
12656 if (type->isFloatingPointTy())
12657 weight = CW_SpecificReg;
12660 if (type->isX86_MMXTy() && Subtarget->hasMMX())
12661 weight = CW_SpecificReg;
12665 if ((type->getPrimitiveSizeInBits() == 128) && Subtarget->hasXMM())
12666 weight = CW_Register;
12669 if (ConstantInt *C = dyn_cast<ConstantInt>(info.CallOperandVal)) {
12670 if (C->getZExtValue() <= 31)
12671 weight = CW_Constant;
12675 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
12676 if (C->getZExtValue() <= 63)
12677 weight = CW_Constant;
12681 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
12682 if ((C->getSExtValue() >= -0x80) && (C->getSExtValue() <= 0x7f))
12683 weight = CW_Constant;
12687 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
12688 if ((C->getZExtValue() == 0xff) || (C->getZExtValue() == 0xffff))
12689 weight = CW_Constant;
12693 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
12694 if (C->getZExtValue() <= 3)
12695 weight = CW_Constant;
12699 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
12700 if (C->getZExtValue() <= 0xff)
12701 weight = CW_Constant;
12706 if (dyn_cast<ConstantFP>(CallOperandVal)) {
12707 weight = CW_Constant;
12711 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
12712 if ((C->getSExtValue() >= -0x80000000LL) &&
12713 (C->getSExtValue() <= 0x7fffffffLL))
12714 weight = CW_Constant;
12718 if (ConstantInt *C = dyn_cast<ConstantInt>(CallOperandVal)) {
12719 if (C->getZExtValue() <= 0xffffffff)
12720 weight = CW_Constant;
12727 /// LowerXConstraint - try to replace an X constraint, which matches anything,
12728 /// with another that has more specific requirements based on the type of the
12729 /// corresponding operand.
12730 const char *X86TargetLowering::
12731 LowerXConstraint(EVT ConstraintVT) const {
12732 // FP X constraints get lowered to SSE1/2 registers if available, otherwise
12733 // 'f' like normal targets.
12734 if (ConstraintVT.isFloatingPoint()) {
12735 if (Subtarget->hasXMMInt())
12737 if (Subtarget->hasXMM())
12741 return TargetLowering::LowerXConstraint(ConstraintVT);
12744 /// LowerAsmOperandForConstraint - Lower the specified operand into the Ops
12745 /// vector. If it is invalid, don't add anything to Ops.
12746 void X86TargetLowering::LowerAsmOperandForConstraint(SDValue Op,
12747 std::string &Constraint,
12748 std::vector<SDValue>&Ops,
12749 SelectionDAG &DAG) const {
12750 SDValue Result(0, 0);
12752 // Only support length 1 constraints for now.
12753 if (Constraint.length() > 1) return;
12755 char ConstraintLetter = Constraint[0];
12756 switch (ConstraintLetter) {
12759 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
12760 if (C->getZExtValue() <= 31) {
12761 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
12767 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
12768 if (C->getZExtValue() <= 63) {
12769 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
12775 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
12776 if ((int8_t)C->getSExtValue() == C->getSExtValue()) {
12777 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
12783 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
12784 if (C->getZExtValue() <= 255) {
12785 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
12791 // 32-bit signed value
12792 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
12793 if (ConstantInt::isValueValidForType(Type::getInt32Ty(*DAG.getContext()),
12794 C->getSExtValue())) {
12795 // Widen to 64 bits here to get it sign extended.
12796 Result = DAG.getTargetConstant(C->getSExtValue(), MVT::i64);
12799 // FIXME gcc accepts some relocatable values here too, but only in certain
12800 // memory models; it's complicated.
12805 // 32-bit unsigned value
12806 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
12807 if (ConstantInt::isValueValidForType(Type::getInt32Ty(*DAG.getContext()),
12808 C->getZExtValue())) {
12809 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
12813 // FIXME gcc accepts some relocatable values here too, but only in certain
12814 // memory models; it's complicated.
12818 // Literal immediates are always ok.
12819 if (ConstantSDNode *CST = dyn_cast<ConstantSDNode>(Op)) {
12820 // Widen to 64 bits here to get it sign extended.
12821 Result = DAG.getTargetConstant(CST->getSExtValue(), MVT::i64);
12825 // In any sort of PIC mode addresses need to be computed at runtime by
12826 // adding in a register or some sort of table lookup. These can't
12827 // be used as immediates.
12828 if (Subtarget->isPICStyleGOT() || Subtarget->isPICStyleStubPIC())
12831 // If we are in non-pic codegen mode, we allow the address of a global (with
12832 // an optional displacement) to be used with 'i'.
12833 GlobalAddressSDNode *GA = 0;
12834 int64_t Offset = 0;
12836 // Match either (GA), (GA+C), (GA+C1+C2), etc.
12838 if ((GA = dyn_cast<GlobalAddressSDNode>(Op))) {
12839 Offset += GA->getOffset();
12841 } else if (Op.getOpcode() == ISD::ADD) {
12842 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op.getOperand(1))) {
12843 Offset += C->getZExtValue();
12844 Op = Op.getOperand(0);
12847 } else if (Op.getOpcode() == ISD::SUB) {
12848 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op.getOperand(1))) {
12849 Offset += -C->getZExtValue();
12850 Op = Op.getOperand(0);
12855 // Otherwise, this isn't something we can handle, reject it.
12859 const GlobalValue *GV = GA->getGlobal();
12860 // If we require an extra load to get this address, as in PIC mode, we
12861 // can't accept it.
12862 if (isGlobalStubReference(Subtarget->ClassifyGlobalReference(GV,
12863 getTargetMachine())))
12866 Result = DAG.getTargetGlobalAddress(GV, Op.getDebugLoc(),
12867 GA->getValueType(0), Offset);
12872 if (Result.getNode()) {
12873 Ops.push_back(Result);
12876 return TargetLowering::LowerAsmOperandForConstraint(Op, Constraint, Ops, DAG);
12879 std::vector<unsigned> X86TargetLowering::
12880 getRegClassForInlineAsmConstraint(const std::string &Constraint,
12882 if (Constraint.size() == 1) {
12883 // FIXME: not handling fp-stack yet!
12884 switch (Constraint[0]) { // GCC X86 Constraint Letters
12885 default: break; // Unknown constraint letter
12886 case 'q': // GENERAL_REGS in 64-bit mode, Q_REGS in 32-bit mode.
12887 if (Subtarget->is64Bit()) {
12888 if (VT == MVT::i32)
12889 return make_vector<unsigned>(X86::EAX, X86::EDX, X86::ECX, X86::EBX,
12890 X86::ESI, X86::EDI, X86::R8D, X86::R9D,
12891 X86::R10D,X86::R11D,X86::R12D,
12892 X86::R13D,X86::R14D,X86::R15D,
12893 X86::EBP, X86::ESP, 0);
12894 else if (VT == MVT::i16)
12895 return make_vector<unsigned>(X86::AX, X86::DX, X86::CX, X86::BX,
12896 X86::SI, X86::DI, X86::R8W,X86::R9W,
12897 X86::R10W,X86::R11W,X86::R12W,
12898 X86::R13W,X86::R14W,X86::R15W,
12899 X86::BP, X86::SP, 0);
12900 else if (VT == MVT::i8)
12901 return make_vector<unsigned>(X86::AL, X86::DL, X86::CL, X86::BL,
12902 X86::SIL, X86::DIL, X86::R8B,X86::R9B,
12903 X86::R10B,X86::R11B,X86::R12B,
12904 X86::R13B,X86::R14B,X86::R15B,
12905 X86::BPL, X86::SPL, 0);
12907 else if (VT == MVT::i64)
12908 return make_vector<unsigned>(X86::RAX, X86::RDX, X86::RCX, X86::RBX,
12909 X86::RSI, X86::RDI, X86::R8, X86::R9,
12910 X86::R10, X86::R11, X86::R12,
12911 X86::R13, X86::R14, X86::R15,
12912 X86::RBP, X86::RSP, 0);
12916 // 32-bit fallthrough
12917 case 'Q': // Q_REGS
12918 if (VT == MVT::i32)
12919 return make_vector<unsigned>(X86::EAX, X86::EDX, X86::ECX, X86::EBX, 0);
12920 else if (VT == MVT::i16)
12921 return make_vector<unsigned>(X86::AX, X86::DX, X86::CX, X86::BX, 0);
12922 else if (VT == MVT::i8)
12923 return make_vector<unsigned>(X86::AL, X86::DL, X86::CL, X86::BL, 0);
12924 else if (VT == MVT::i64)
12925 return make_vector<unsigned>(X86::RAX, X86::RDX, X86::RCX, X86::RBX, 0);
12930 return std::vector<unsigned>();
12933 std::pair<unsigned, const TargetRegisterClass*>
12934 X86TargetLowering::getRegForInlineAsmConstraint(const std::string &Constraint,
12936 // First, see if this is a constraint that directly corresponds to an LLVM
12938 if (Constraint.size() == 1) {
12939 // GCC Constraint Letters
12940 switch (Constraint[0]) {
12942 case 'r': // GENERAL_REGS
12943 case 'l': // INDEX_REGS
12945 return std::make_pair(0U, X86::GR8RegisterClass);
12946 if (VT == MVT::i16)
12947 return std::make_pair(0U, X86::GR16RegisterClass);
12948 if (VT == MVT::i32 || VT == MVT::f32 || !Subtarget->is64Bit())
12949 return std::make_pair(0U, X86::GR32RegisterClass);
12950 return std::make_pair(0U, X86::GR64RegisterClass);
12951 case 'R': // LEGACY_REGS
12953 return std::make_pair(0U, X86::GR8_NOREXRegisterClass);
12954 if (VT == MVT::i16)
12955 return std::make_pair(0U, X86::GR16_NOREXRegisterClass);
12956 if (VT == MVT::i32 || !Subtarget->is64Bit())
12957 return std::make_pair(0U, X86::GR32_NOREXRegisterClass);
12958 return std::make_pair(0U, X86::GR64_NOREXRegisterClass);
12959 case 'f': // FP Stack registers.
12960 // If SSE is enabled for this VT, use f80 to ensure the isel moves the
12961 // value to the correct fpstack register class.
12962 if (VT == MVT::f32 && !isScalarFPTypeInSSEReg(VT))
12963 return std::make_pair(0U, X86::RFP32RegisterClass);
12964 if (VT == MVT::f64 && !isScalarFPTypeInSSEReg(VT))
12965 return std::make_pair(0U, X86::RFP64RegisterClass);
12966 return std::make_pair(0U, X86::RFP80RegisterClass);
12967 case 'y': // MMX_REGS if MMX allowed.
12968 if (!Subtarget->hasMMX()) break;
12969 return std::make_pair(0U, X86::VR64RegisterClass);
12970 case 'Y': // SSE_REGS if SSE2 allowed
12971 if (!Subtarget->hasXMMInt()) break;
12973 case 'x': // SSE_REGS if SSE1 allowed
12974 if (!Subtarget->hasXMM()) break;
12976 switch (VT.getSimpleVT().SimpleTy) {
12978 // Scalar SSE types.
12981 return std::make_pair(0U, X86::FR32RegisterClass);
12984 return std::make_pair(0U, X86::FR64RegisterClass);
12992 return std::make_pair(0U, X86::VR128RegisterClass);
12998 // Use the default implementation in TargetLowering to convert the register
12999 // constraint into a member of a register class.
13000 std::pair<unsigned, const TargetRegisterClass*> Res;
13001 Res = TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
13003 // Not found as a standard register?
13004 if (Res.second == 0) {
13005 // Map st(0) -> st(7) -> ST0
13006 if (Constraint.size() == 7 && Constraint[0] == '{' &&
13007 tolower(Constraint[1]) == 's' &&
13008 tolower(Constraint[2]) == 't' &&
13009 Constraint[3] == '(' &&
13010 (Constraint[4] >= '0' && Constraint[4] <= '7') &&
13011 Constraint[5] == ')' &&
13012 Constraint[6] == '}') {
13014 Res.first = X86::ST0+Constraint[4]-'0';
13015 Res.second = X86::RFP80RegisterClass;
13019 // GCC allows "st(0)" to be called just plain "st".
13020 if (StringRef("{st}").equals_lower(Constraint)) {
13021 Res.first = X86::ST0;
13022 Res.second = X86::RFP80RegisterClass;
13027 if (StringRef("{flags}").equals_lower(Constraint)) {
13028 Res.first = X86::EFLAGS;
13029 Res.second = X86::CCRRegisterClass;
13033 // 'A' means EAX + EDX.
13034 if (Constraint == "A") {
13035 Res.first = X86::EAX;
13036 Res.second = X86::GR32_ADRegisterClass;
13042 // Otherwise, check to see if this is a register class of the wrong value
13043 // type. For example, we want to map "{ax},i32" -> {eax}, we don't want it to
13044 // turn into {ax},{dx}.
13045 if (Res.second->hasType(VT))
13046 return Res; // Correct type already, nothing to do.
13048 // All of the single-register GCC register classes map their values onto
13049 // 16-bit register pieces "ax","dx","cx","bx","si","di","bp","sp". If we
13050 // really want an 8-bit or 32-bit register, map to the appropriate register
13051 // class and return the appropriate register.
13052 if (Res.second == X86::GR16RegisterClass) {
13053 if (VT == MVT::i8) {
13054 unsigned DestReg = 0;
13055 switch (Res.first) {
13057 case X86::AX: DestReg = X86::AL; break;
13058 case X86::DX: DestReg = X86::DL; break;
13059 case X86::CX: DestReg = X86::CL; break;
13060 case X86::BX: DestReg = X86::BL; break;
13063 Res.first = DestReg;
13064 Res.second = X86::GR8RegisterClass;
13066 } else if (VT == MVT::i32) {
13067 unsigned DestReg = 0;
13068 switch (Res.first) {
13070 case X86::AX: DestReg = X86::EAX; break;
13071 case X86::DX: DestReg = X86::EDX; break;
13072 case X86::CX: DestReg = X86::ECX; break;
13073 case X86::BX: DestReg = X86::EBX; break;
13074 case X86::SI: DestReg = X86::ESI; break;
13075 case X86::DI: DestReg = X86::EDI; break;
13076 case X86::BP: DestReg = X86::EBP; break;
13077 case X86::SP: DestReg = X86::ESP; break;
13080 Res.first = DestReg;
13081 Res.second = X86::GR32RegisterClass;
13083 } else if (VT == MVT::i64) {
13084 unsigned DestReg = 0;
13085 switch (Res.first) {
13087 case X86::AX: DestReg = X86::RAX; break;
13088 case X86::DX: DestReg = X86::RDX; break;
13089 case X86::CX: DestReg = X86::RCX; break;
13090 case X86::BX: DestReg = X86::RBX; break;
13091 case X86::SI: DestReg = X86::RSI; break;
13092 case X86::DI: DestReg = X86::RDI; break;
13093 case X86::BP: DestReg = X86::RBP; break;
13094 case X86::SP: DestReg = X86::RSP; break;
13097 Res.first = DestReg;
13098 Res.second = X86::GR64RegisterClass;
13101 } else if (Res.second == X86::FR32RegisterClass ||
13102 Res.second == X86::FR64RegisterClass ||
13103 Res.second == X86::VR128RegisterClass) {
13104 // Handle references to XMM physical registers that got mapped into the
13105 // wrong class. This can happen with constraints like {xmm0} where the
13106 // target independent register mapper will just pick the first match it can
13107 // find, ignoring the required type.
13108 if (VT == MVT::f32)
13109 Res.second = X86::FR32RegisterClass;
13110 else if (VT == MVT::f64)
13111 Res.second = X86::FR64RegisterClass;
13112 else if (X86::VR128RegisterClass->hasType(VT))
13113 Res.second = X86::VR128RegisterClass;