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 "llvm/CallingConv.h"
22 #include "llvm/Constants.h"
23 #include "llvm/DerivedTypes.h"
24 #include "llvm/GlobalAlias.h"
25 #include "llvm/GlobalVariable.h"
26 #include "llvm/Function.h"
27 #include "llvm/Instructions.h"
28 #include "llvm/Intrinsics.h"
29 #include "llvm/LLVMContext.h"
30 #include "llvm/CodeGen/MachineFrameInfo.h"
31 #include "llvm/CodeGen/MachineFunction.h"
32 #include "llvm/CodeGen/MachineInstrBuilder.h"
33 #include "llvm/CodeGen/MachineJumpTableInfo.h"
34 #include "llvm/CodeGen/MachineModuleInfo.h"
35 #include "llvm/CodeGen/MachineRegisterInfo.h"
36 #include "llvm/CodeGen/PseudoSourceValue.h"
37 #include "llvm/MC/MCAsmInfo.h"
38 #include "llvm/MC/MCContext.h"
39 #include "llvm/MC/MCExpr.h"
40 #include "llvm/MC/MCSymbol.h"
41 #include "llvm/ADT/BitVector.h"
42 #include "llvm/ADT/SmallSet.h"
43 #include "llvm/ADT/Statistic.h"
44 #include "llvm/ADT/StringExtras.h"
45 #include "llvm/ADT/VectorExtras.h"
46 #include "llvm/Support/CommandLine.h"
47 #include "llvm/Support/Debug.h"
48 #include "llvm/Support/Dwarf.h"
49 #include "llvm/Support/ErrorHandling.h"
50 #include "llvm/Support/MathExtras.h"
51 #include "llvm/Support/raw_ostream.h"
53 using namespace dwarf;
55 STATISTIC(NumTailCalls, "Number of tail calls");
58 DisableMMX("disable-mmx", cl::Hidden, cl::desc("Disable use of MMX"));
60 // Forward declarations.
61 static SDValue getMOVL(SelectionDAG &DAG, DebugLoc dl, EVT VT, SDValue V1,
64 static TargetLoweringObjectFile *createTLOF(X86TargetMachine &TM) {
66 bool is64Bit = TM.getSubtarget<X86Subtarget>().is64Bit();
68 if (TM.getSubtarget<X86Subtarget>().isTargetDarwin()) {
69 if (is64Bit) return new X8664_MachoTargetObjectFile();
70 return new TargetLoweringObjectFileMachO();
71 } else if (TM.getSubtarget<X86Subtarget>().isTargetELF() ){
72 if (is64Bit) return new X8664_ELFTargetObjectFile(TM);
73 return new X8632_ELFTargetObjectFile(TM);
74 } else if (TM.getSubtarget<X86Subtarget>().isTargetCOFF()) {
75 return new TargetLoweringObjectFileCOFF();
77 llvm_unreachable("unknown subtarget type");
80 X86TargetLowering::X86TargetLowering(X86TargetMachine &TM)
81 : TargetLowering(TM, createTLOF(TM)) {
82 Subtarget = &TM.getSubtarget<X86Subtarget>();
83 X86ScalarSSEf64 = Subtarget->hasSSE2();
84 X86ScalarSSEf32 = Subtarget->hasSSE1();
85 X86StackPtr = Subtarget->is64Bit() ? X86::RSP : X86::ESP;
87 RegInfo = TM.getRegisterInfo();
90 // Set up the TargetLowering object.
92 // X86 is weird, it always uses i8 for shift amounts and setcc results.
93 setShiftAmountType(MVT::i8);
94 setBooleanContents(ZeroOrOneBooleanContent);
95 setSchedulingPreference(Sched::RegPressure);
96 setStackPointerRegisterToSaveRestore(X86StackPtr);
98 if (Subtarget->isTargetDarwin()) {
99 // Darwin should use _setjmp/_longjmp instead of setjmp/longjmp.
100 setUseUnderscoreSetJmp(false);
101 setUseUnderscoreLongJmp(false);
102 } else if (Subtarget->isTargetMingw()) {
103 // MS runtime is weird: it exports _setjmp, but longjmp!
104 setUseUnderscoreSetJmp(true);
105 setUseUnderscoreLongJmp(false);
107 setUseUnderscoreSetJmp(true);
108 setUseUnderscoreLongJmp(true);
111 // Set up the register classes.
112 addRegisterClass(MVT::i8, X86::GR8RegisterClass);
113 addRegisterClass(MVT::i16, X86::GR16RegisterClass);
114 addRegisterClass(MVT::i32, X86::GR32RegisterClass);
115 if (Subtarget->is64Bit())
116 addRegisterClass(MVT::i64, X86::GR64RegisterClass);
118 setLoadExtAction(ISD::SEXTLOAD, MVT::i1, Promote);
120 // We don't accept any truncstore of integer registers.
121 setTruncStoreAction(MVT::i64, MVT::i32, Expand);
122 setTruncStoreAction(MVT::i64, MVT::i16, Expand);
123 setTruncStoreAction(MVT::i64, MVT::i8 , Expand);
124 setTruncStoreAction(MVT::i32, MVT::i16, Expand);
125 setTruncStoreAction(MVT::i32, MVT::i8 , Expand);
126 setTruncStoreAction(MVT::i16, MVT::i8, Expand);
128 // SETOEQ and SETUNE require checking two conditions.
129 setCondCodeAction(ISD::SETOEQ, MVT::f32, Expand);
130 setCondCodeAction(ISD::SETOEQ, MVT::f64, Expand);
131 setCondCodeAction(ISD::SETOEQ, MVT::f80, Expand);
132 setCondCodeAction(ISD::SETUNE, MVT::f32, Expand);
133 setCondCodeAction(ISD::SETUNE, MVT::f64, Expand);
134 setCondCodeAction(ISD::SETUNE, MVT::f80, Expand);
136 // Promote all UINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have this
138 setOperationAction(ISD::UINT_TO_FP , MVT::i1 , Promote);
139 setOperationAction(ISD::UINT_TO_FP , MVT::i8 , Promote);
140 setOperationAction(ISD::UINT_TO_FP , MVT::i16 , Promote);
142 if (Subtarget->is64Bit()) {
143 setOperationAction(ISD::UINT_TO_FP , MVT::i32 , Promote);
144 setOperationAction(ISD::UINT_TO_FP , MVT::i64 , Expand);
145 } else if (!UseSoftFloat) {
146 // We have an algorithm for SSE2->double, and we turn this into a
147 // 64-bit FILD followed by conditional FADD for other targets.
148 setOperationAction(ISD::UINT_TO_FP , MVT::i64 , Custom);
149 // We have an algorithm for SSE2, and we turn this into a 64-bit
150 // FILD for other targets.
151 setOperationAction(ISD::UINT_TO_FP , MVT::i32 , Custom);
154 // Promote i1/i8 SINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have
156 setOperationAction(ISD::SINT_TO_FP , MVT::i1 , Promote);
157 setOperationAction(ISD::SINT_TO_FP , MVT::i8 , Promote);
160 // SSE has no i16 to fp conversion, only i32
161 if (X86ScalarSSEf32) {
162 setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Promote);
163 // f32 and f64 cases are Legal, f80 case is not
164 setOperationAction(ISD::SINT_TO_FP , MVT::i32 , Custom);
166 setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Custom);
167 setOperationAction(ISD::SINT_TO_FP , MVT::i32 , Custom);
170 setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Promote);
171 setOperationAction(ISD::SINT_TO_FP , MVT::i32 , Promote);
174 // In 32-bit mode these are custom lowered. In 64-bit mode F32 and F64
175 // are Legal, f80 is custom lowered.
176 setOperationAction(ISD::FP_TO_SINT , MVT::i64 , Custom);
177 setOperationAction(ISD::SINT_TO_FP , MVT::i64 , Custom);
179 // Promote i1/i8 FP_TO_SINT to larger FP_TO_SINTS's, as X86 doesn't have
181 setOperationAction(ISD::FP_TO_SINT , MVT::i1 , Promote);
182 setOperationAction(ISD::FP_TO_SINT , MVT::i8 , Promote);
184 if (X86ScalarSSEf32) {
185 setOperationAction(ISD::FP_TO_SINT , MVT::i16 , Promote);
186 // f32 and f64 cases are Legal, f80 case is not
187 setOperationAction(ISD::FP_TO_SINT , MVT::i32 , Custom);
189 setOperationAction(ISD::FP_TO_SINT , MVT::i16 , Custom);
190 setOperationAction(ISD::FP_TO_SINT , MVT::i32 , Custom);
193 // Handle FP_TO_UINT by promoting the destination to a larger signed
195 setOperationAction(ISD::FP_TO_UINT , MVT::i1 , Promote);
196 setOperationAction(ISD::FP_TO_UINT , MVT::i8 , Promote);
197 setOperationAction(ISD::FP_TO_UINT , MVT::i16 , Promote);
199 if (Subtarget->is64Bit()) {
200 setOperationAction(ISD::FP_TO_UINT , MVT::i64 , Expand);
201 setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Promote);
202 } else if (!UseSoftFloat) {
203 if (X86ScalarSSEf32 && !Subtarget->hasSSE3())
204 // Expand FP_TO_UINT into a select.
205 // FIXME: We would like to use a Custom expander here eventually to do
206 // the optimal thing for SSE vs. the default expansion in the legalizer.
207 setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Expand);
209 // With SSE3 we can use fisttpll to convert to a signed i64; without
210 // SSE, we're stuck with a fistpll.
211 setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Custom);
214 // TODO: when we have SSE, these could be more efficient, by using movd/movq.
215 if (!X86ScalarSSEf64) {
216 setOperationAction(ISD::BIT_CONVERT , MVT::f32 , Expand);
217 setOperationAction(ISD::BIT_CONVERT , MVT::i32 , Expand);
218 if (Subtarget->is64Bit()) {
219 setOperationAction(ISD::BIT_CONVERT , MVT::f64 , Expand);
220 // Without SSE, i64->f64 goes through memory; i64->MMX is Legal.
221 if (Subtarget->hasMMX() && !DisableMMX)
222 setOperationAction(ISD::BIT_CONVERT , MVT::i64 , Custom);
224 setOperationAction(ISD::BIT_CONVERT , MVT::i64 , Expand);
228 // Scalar integer divide and remainder are lowered to use operations that
229 // produce two results, to match the available instructions. This exposes
230 // the two-result form to trivial CSE, which is able to combine x/y and x%y
231 // into a single instruction.
233 // Scalar integer multiply-high is also lowered to use two-result
234 // operations, to match the available instructions. However, plain multiply
235 // (low) operations are left as Legal, as there are single-result
236 // instructions for this in x86. Using the two-result multiply instructions
237 // when both high and low results are needed must be arranged by dagcombine.
238 setOperationAction(ISD::MULHS , MVT::i8 , Expand);
239 setOperationAction(ISD::MULHU , MVT::i8 , Expand);
240 setOperationAction(ISD::SDIV , MVT::i8 , Expand);
241 setOperationAction(ISD::UDIV , MVT::i8 , Expand);
242 setOperationAction(ISD::SREM , MVT::i8 , Expand);
243 setOperationAction(ISD::UREM , MVT::i8 , Expand);
244 setOperationAction(ISD::MULHS , MVT::i16 , Expand);
245 setOperationAction(ISD::MULHU , MVT::i16 , Expand);
246 setOperationAction(ISD::SDIV , MVT::i16 , Expand);
247 setOperationAction(ISD::UDIV , MVT::i16 , Expand);
248 setOperationAction(ISD::SREM , MVT::i16 , Expand);
249 setOperationAction(ISD::UREM , MVT::i16 , Expand);
250 setOperationAction(ISD::MULHS , MVT::i32 , Expand);
251 setOperationAction(ISD::MULHU , MVT::i32 , Expand);
252 setOperationAction(ISD::SDIV , MVT::i32 , Expand);
253 setOperationAction(ISD::UDIV , MVT::i32 , Expand);
254 setOperationAction(ISD::SREM , MVT::i32 , Expand);
255 setOperationAction(ISD::UREM , MVT::i32 , Expand);
256 setOperationAction(ISD::MULHS , MVT::i64 , Expand);
257 setOperationAction(ISD::MULHU , MVT::i64 , Expand);
258 setOperationAction(ISD::SDIV , MVT::i64 , Expand);
259 setOperationAction(ISD::UDIV , MVT::i64 , Expand);
260 setOperationAction(ISD::SREM , MVT::i64 , Expand);
261 setOperationAction(ISD::UREM , MVT::i64 , Expand);
263 setOperationAction(ISD::BR_JT , MVT::Other, Expand);
264 setOperationAction(ISD::BRCOND , MVT::Other, Custom);
265 setOperationAction(ISD::BR_CC , MVT::Other, Expand);
266 setOperationAction(ISD::SELECT_CC , MVT::Other, Expand);
267 if (Subtarget->is64Bit())
268 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i32, Legal);
269 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16 , Legal);
270 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8 , Legal);
271 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1 , Expand);
272 setOperationAction(ISD::FP_ROUND_INREG , MVT::f32 , Expand);
273 setOperationAction(ISD::FREM , MVT::f32 , Expand);
274 setOperationAction(ISD::FREM , MVT::f64 , Expand);
275 setOperationAction(ISD::FREM , MVT::f80 , Expand);
276 setOperationAction(ISD::FLT_ROUNDS_ , MVT::i32 , Custom);
278 setOperationAction(ISD::CTPOP , MVT::i8 , Expand);
279 setOperationAction(ISD::CTTZ , MVT::i8 , Custom);
280 setOperationAction(ISD::CTLZ , MVT::i8 , Custom);
281 setOperationAction(ISD::CTPOP , MVT::i16 , Expand);
282 setOperationAction(ISD::CTTZ , MVT::i16 , Custom);
283 setOperationAction(ISD::CTLZ , MVT::i16 , Custom);
284 setOperationAction(ISD::CTPOP , MVT::i32 , Expand);
285 setOperationAction(ISD::CTTZ , MVT::i32 , Custom);
286 setOperationAction(ISD::CTLZ , MVT::i32 , Custom);
287 if (Subtarget->is64Bit()) {
288 setOperationAction(ISD::CTPOP , MVT::i64 , Expand);
289 setOperationAction(ISD::CTTZ , MVT::i64 , Custom);
290 setOperationAction(ISD::CTLZ , MVT::i64 , Custom);
293 setOperationAction(ISD::READCYCLECOUNTER , MVT::i64 , Custom);
294 setOperationAction(ISD::BSWAP , MVT::i16 , Expand);
296 // These should be promoted to a larger select which is supported.
297 setOperationAction(ISD::SELECT , MVT::i1 , Promote);
298 // X86 wants to expand cmov itself.
299 setOperationAction(ISD::SELECT , MVT::i8 , Custom);
300 setOperationAction(ISD::SELECT , MVT::i16 , Custom);
301 setOperationAction(ISD::SELECT , MVT::i32 , Custom);
302 setOperationAction(ISD::SELECT , MVT::f32 , Custom);
303 setOperationAction(ISD::SELECT , MVT::f64 , Custom);
304 setOperationAction(ISD::SELECT , MVT::f80 , Custom);
305 setOperationAction(ISD::SETCC , MVT::i8 , Custom);
306 setOperationAction(ISD::SETCC , MVT::i16 , Custom);
307 setOperationAction(ISD::SETCC , MVT::i32 , Custom);
308 setOperationAction(ISD::SETCC , MVT::f32 , Custom);
309 setOperationAction(ISD::SETCC , MVT::f64 , Custom);
310 setOperationAction(ISD::SETCC , MVT::f80 , Custom);
311 if (Subtarget->is64Bit()) {
312 setOperationAction(ISD::SELECT , MVT::i64 , Custom);
313 setOperationAction(ISD::SETCC , MVT::i64 , Custom);
315 setOperationAction(ISD::EH_RETURN , MVT::Other, Custom);
318 setOperationAction(ISD::ConstantPool , MVT::i32 , Custom);
319 setOperationAction(ISD::JumpTable , MVT::i32 , Custom);
320 setOperationAction(ISD::GlobalAddress , MVT::i32 , Custom);
321 setOperationAction(ISD::GlobalTLSAddress, MVT::i32 , Custom);
322 if (Subtarget->is64Bit())
323 setOperationAction(ISD::GlobalTLSAddress, MVT::i64, Custom);
324 setOperationAction(ISD::ExternalSymbol , MVT::i32 , Custom);
325 setOperationAction(ISD::BlockAddress , MVT::i32 , Custom);
326 if (Subtarget->is64Bit()) {
327 setOperationAction(ISD::ConstantPool , MVT::i64 , Custom);
328 setOperationAction(ISD::JumpTable , MVT::i64 , Custom);
329 setOperationAction(ISD::GlobalAddress , MVT::i64 , Custom);
330 setOperationAction(ISD::ExternalSymbol, MVT::i64 , Custom);
331 setOperationAction(ISD::BlockAddress , MVT::i64 , Custom);
333 // 64-bit addm sub, shl, sra, srl (iff 32-bit x86)
334 setOperationAction(ISD::SHL_PARTS , MVT::i32 , Custom);
335 setOperationAction(ISD::SRA_PARTS , MVT::i32 , Custom);
336 setOperationAction(ISD::SRL_PARTS , MVT::i32 , Custom);
337 if (Subtarget->is64Bit()) {
338 setOperationAction(ISD::SHL_PARTS , MVT::i64 , Custom);
339 setOperationAction(ISD::SRA_PARTS , MVT::i64 , Custom);
340 setOperationAction(ISD::SRL_PARTS , MVT::i64 , Custom);
343 if (Subtarget->hasSSE1())
344 setOperationAction(ISD::PREFETCH , MVT::Other, Legal);
346 // We may not have a libcall for MEMBARRIER so we should lower this.
347 setOperationAction(ISD::MEMBARRIER , MVT::Other, Custom);
349 // On X86 and X86-64, atomic operations are lowered to locked instructions.
350 // Locked instructions, in turn, have implicit fence semantics (all memory
351 // operations are flushed before issuing the locked instruction, and they
352 // are not buffered), so we can fold away the common pattern of
353 // fence-atomic-fence.
354 setShouldFoldAtomicFences(true);
356 // Expand certain atomics
357 setOperationAction(ISD::ATOMIC_CMP_SWAP, MVT::i8, Custom);
358 setOperationAction(ISD::ATOMIC_CMP_SWAP, MVT::i16, Custom);
359 setOperationAction(ISD::ATOMIC_CMP_SWAP, MVT::i32, Custom);
360 setOperationAction(ISD::ATOMIC_CMP_SWAP, MVT::i64, Custom);
362 setOperationAction(ISD::ATOMIC_LOAD_SUB, MVT::i8, Custom);
363 setOperationAction(ISD::ATOMIC_LOAD_SUB, MVT::i16, Custom);
364 setOperationAction(ISD::ATOMIC_LOAD_SUB, MVT::i32, Custom);
365 setOperationAction(ISD::ATOMIC_LOAD_SUB, MVT::i64, Custom);
367 if (!Subtarget->is64Bit()) {
368 setOperationAction(ISD::ATOMIC_LOAD_ADD, MVT::i64, Custom);
369 setOperationAction(ISD::ATOMIC_LOAD_SUB, MVT::i64, Custom);
370 setOperationAction(ISD::ATOMIC_LOAD_AND, MVT::i64, Custom);
371 setOperationAction(ISD::ATOMIC_LOAD_OR, MVT::i64, Custom);
372 setOperationAction(ISD::ATOMIC_LOAD_XOR, MVT::i64, Custom);
373 setOperationAction(ISD::ATOMIC_LOAD_NAND, MVT::i64, Custom);
374 setOperationAction(ISD::ATOMIC_SWAP, MVT::i64, Custom);
377 // FIXME - use subtarget debug flags
378 if (!Subtarget->isTargetDarwin() &&
379 !Subtarget->isTargetELF() &&
380 !Subtarget->isTargetCygMing()) {
381 setOperationAction(ISD::EH_LABEL, MVT::Other, Expand);
384 setOperationAction(ISD::EXCEPTIONADDR, MVT::i64, Expand);
385 setOperationAction(ISD::EHSELECTION, MVT::i64, Expand);
386 setOperationAction(ISD::EXCEPTIONADDR, MVT::i32, Expand);
387 setOperationAction(ISD::EHSELECTION, MVT::i32, Expand);
388 if (Subtarget->is64Bit()) {
389 setExceptionPointerRegister(X86::RAX);
390 setExceptionSelectorRegister(X86::RDX);
392 setExceptionPointerRegister(X86::EAX);
393 setExceptionSelectorRegister(X86::EDX);
395 setOperationAction(ISD::FRAME_TO_ARGS_OFFSET, MVT::i32, Custom);
396 setOperationAction(ISD::FRAME_TO_ARGS_OFFSET, MVT::i64, Custom);
398 setOperationAction(ISD::TRAMPOLINE, MVT::Other, Custom);
400 setOperationAction(ISD::TRAP, MVT::Other, Legal);
402 // VASTART needs to be custom lowered to use the VarArgsFrameIndex
403 setOperationAction(ISD::VASTART , MVT::Other, Custom);
404 setOperationAction(ISD::VAEND , MVT::Other, Expand);
405 if (Subtarget->is64Bit()) {
406 setOperationAction(ISD::VAARG , MVT::Other, Custom);
407 setOperationAction(ISD::VACOPY , MVT::Other, Custom);
409 setOperationAction(ISD::VAARG , MVT::Other, Expand);
410 setOperationAction(ISD::VACOPY , MVT::Other, Expand);
413 setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
414 setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
415 if (Subtarget->is64Bit())
416 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i64, Expand);
417 if (Subtarget->isTargetCygMing())
418 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Custom);
420 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Expand);
422 if (!UseSoftFloat && X86ScalarSSEf64) {
423 // f32 and f64 use SSE.
424 // Set up the FP register classes.
425 addRegisterClass(MVT::f32, X86::FR32RegisterClass);
426 addRegisterClass(MVT::f64, X86::FR64RegisterClass);
428 // Use ANDPD to simulate FABS.
429 setOperationAction(ISD::FABS , MVT::f64, Custom);
430 setOperationAction(ISD::FABS , MVT::f32, Custom);
432 // Use XORP to simulate FNEG.
433 setOperationAction(ISD::FNEG , MVT::f64, Custom);
434 setOperationAction(ISD::FNEG , MVT::f32, Custom);
436 // Use ANDPD and ORPD to simulate FCOPYSIGN.
437 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Custom);
438 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
440 // We don't support sin/cos/fmod
441 setOperationAction(ISD::FSIN , MVT::f64, Expand);
442 setOperationAction(ISD::FCOS , MVT::f64, Expand);
443 setOperationAction(ISD::FSIN , MVT::f32, Expand);
444 setOperationAction(ISD::FCOS , MVT::f32, Expand);
446 // Expand FP immediates into loads from the stack, except for the special
448 addLegalFPImmediate(APFloat(+0.0)); // xorpd
449 addLegalFPImmediate(APFloat(+0.0f)); // xorps
450 } else if (!UseSoftFloat && X86ScalarSSEf32) {
451 // Use SSE for f32, x87 for f64.
452 // Set up the FP register classes.
453 addRegisterClass(MVT::f32, X86::FR32RegisterClass);
454 addRegisterClass(MVT::f64, X86::RFP64RegisterClass);
456 // Use ANDPS to simulate FABS.
457 setOperationAction(ISD::FABS , MVT::f32, Custom);
459 // Use XORP to simulate FNEG.
460 setOperationAction(ISD::FNEG , MVT::f32, Custom);
462 setOperationAction(ISD::UNDEF, MVT::f64, Expand);
464 // Use ANDPS and ORPS to simulate FCOPYSIGN.
465 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
466 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
468 // We don't support sin/cos/fmod
469 setOperationAction(ISD::FSIN , MVT::f32, Expand);
470 setOperationAction(ISD::FCOS , MVT::f32, Expand);
472 // Special cases we handle for FP constants.
473 addLegalFPImmediate(APFloat(+0.0f)); // xorps
474 addLegalFPImmediate(APFloat(+0.0)); // FLD0
475 addLegalFPImmediate(APFloat(+1.0)); // FLD1
476 addLegalFPImmediate(APFloat(-0.0)); // FLD0/FCHS
477 addLegalFPImmediate(APFloat(-1.0)); // FLD1/FCHS
480 setOperationAction(ISD::FSIN , MVT::f64 , Expand);
481 setOperationAction(ISD::FCOS , MVT::f64 , Expand);
483 } else if (!UseSoftFloat) {
484 // f32 and f64 in x87.
485 // Set up the FP register classes.
486 addRegisterClass(MVT::f64, X86::RFP64RegisterClass);
487 addRegisterClass(MVT::f32, X86::RFP32RegisterClass);
489 setOperationAction(ISD::UNDEF, MVT::f64, Expand);
490 setOperationAction(ISD::UNDEF, MVT::f32, Expand);
491 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
492 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand);
495 setOperationAction(ISD::FSIN , MVT::f64 , Expand);
496 setOperationAction(ISD::FCOS , MVT::f64 , Expand);
498 addLegalFPImmediate(APFloat(+0.0)); // FLD0
499 addLegalFPImmediate(APFloat(+1.0)); // FLD1
500 addLegalFPImmediate(APFloat(-0.0)); // FLD0/FCHS
501 addLegalFPImmediate(APFloat(-1.0)); // FLD1/FCHS
502 addLegalFPImmediate(APFloat(+0.0f)); // FLD0
503 addLegalFPImmediate(APFloat(+1.0f)); // FLD1
504 addLegalFPImmediate(APFloat(-0.0f)); // FLD0/FCHS
505 addLegalFPImmediate(APFloat(-1.0f)); // FLD1/FCHS
508 // Long double always uses X87.
510 addRegisterClass(MVT::f80, X86::RFP80RegisterClass);
511 setOperationAction(ISD::UNDEF, MVT::f80, Expand);
512 setOperationAction(ISD::FCOPYSIGN, MVT::f80, Expand);
515 APFloat TmpFlt(+0.0);
516 TmpFlt.convert(APFloat::x87DoubleExtended, APFloat::rmNearestTiesToEven,
518 addLegalFPImmediate(TmpFlt); // FLD0
520 addLegalFPImmediate(TmpFlt); // FLD0/FCHS
521 APFloat TmpFlt2(+1.0);
522 TmpFlt2.convert(APFloat::x87DoubleExtended, APFloat::rmNearestTiesToEven,
524 addLegalFPImmediate(TmpFlt2); // FLD1
525 TmpFlt2.changeSign();
526 addLegalFPImmediate(TmpFlt2); // FLD1/FCHS
530 setOperationAction(ISD::FSIN , MVT::f80 , Expand);
531 setOperationAction(ISD::FCOS , MVT::f80 , Expand);
535 // Always use a library call for pow.
536 setOperationAction(ISD::FPOW , MVT::f32 , Expand);
537 setOperationAction(ISD::FPOW , MVT::f64 , Expand);
538 setOperationAction(ISD::FPOW , MVT::f80 , Expand);
540 setOperationAction(ISD::FLOG, MVT::f80, Expand);
541 setOperationAction(ISD::FLOG2, MVT::f80, Expand);
542 setOperationAction(ISD::FLOG10, MVT::f80, Expand);
543 setOperationAction(ISD::FEXP, MVT::f80, Expand);
544 setOperationAction(ISD::FEXP2, MVT::f80, Expand);
546 // First set operation action for all vector types to either promote
547 // (for widening) or expand (for scalarization). Then we will selectively
548 // turn on ones that can be effectively codegen'd.
549 for (unsigned VT = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
550 VT <= (unsigned)MVT::LAST_VECTOR_VALUETYPE; ++VT) {
551 setOperationAction(ISD::ADD , (MVT::SimpleValueType)VT, Expand);
552 setOperationAction(ISD::SUB , (MVT::SimpleValueType)VT, Expand);
553 setOperationAction(ISD::FADD, (MVT::SimpleValueType)VT, Expand);
554 setOperationAction(ISD::FNEG, (MVT::SimpleValueType)VT, Expand);
555 setOperationAction(ISD::FSUB, (MVT::SimpleValueType)VT, Expand);
556 setOperationAction(ISD::MUL , (MVT::SimpleValueType)VT, Expand);
557 setOperationAction(ISD::FMUL, (MVT::SimpleValueType)VT, Expand);
558 setOperationAction(ISD::SDIV, (MVT::SimpleValueType)VT, Expand);
559 setOperationAction(ISD::UDIV, (MVT::SimpleValueType)VT, Expand);
560 setOperationAction(ISD::FDIV, (MVT::SimpleValueType)VT, Expand);
561 setOperationAction(ISD::SREM, (MVT::SimpleValueType)VT, Expand);
562 setOperationAction(ISD::UREM, (MVT::SimpleValueType)VT, Expand);
563 setOperationAction(ISD::LOAD, (MVT::SimpleValueType)VT, Expand);
564 setOperationAction(ISD::VECTOR_SHUFFLE, (MVT::SimpleValueType)VT, Expand);
565 setOperationAction(ISD::EXTRACT_VECTOR_ELT,(MVT::SimpleValueType)VT,Expand);
566 setOperationAction(ISD::EXTRACT_SUBVECTOR,(MVT::SimpleValueType)VT,Expand);
567 setOperationAction(ISD::INSERT_VECTOR_ELT,(MVT::SimpleValueType)VT, Expand);
568 setOperationAction(ISD::FABS, (MVT::SimpleValueType)VT, Expand);
569 setOperationAction(ISD::FSIN, (MVT::SimpleValueType)VT, Expand);
570 setOperationAction(ISD::FCOS, (MVT::SimpleValueType)VT, Expand);
571 setOperationAction(ISD::FREM, (MVT::SimpleValueType)VT, Expand);
572 setOperationAction(ISD::FPOWI, (MVT::SimpleValueType)VT, Expand);
573 setOperationAction(ISD::FSQRT, (MVT::SimpleValueType)VT, Expand);
574 setOperationAction(ISD::FCOPYSIGN, (MVT::SimpleValueType)VT, Expand);
575 setOperationAction(ISD::SMUL_LOHI, (MVT::SimpleValueType)VT, Expand);
576 setOperationAction(ISD::UMUL_LOHI, (MVT::SimpleValueType)VT, Expand);
577 setOperationAction(ISD::SDIVREM, (MVT::SimpleValueType)VT, Expand);
578 setOperationAction(ISD::UDIVREM, (MVT::SimpleValueType)VT, Expand);
579 setOperationAction(ISD::FPOW, (MVT::SimpleValueType)VT, Expand);
580 setOperationAction(ISD::CTPOP, (MVT::SimpleValueType)VT, Expand);
581 setOperationAction(ISD::CTTZ, (MVT::SimpleValueType)VT, Expand);
582 setOperationAction(ISD::CTLZ, (MVT::SimpleValueType)VT, Expand);
583 setOperationAction(ISD::SHL, (MVT::SimpleValueType)VT, Expand);
584 setOperationAction(ISD::SRA, (MVT::SimpleValueType)VT, Expand);
585 setOperationAction(ISD::SRL, (MVT::SimpleValueType)VT, Expand);
586 setOperationAction(ISD::ROTL, (MVT::SimpleValueType)VT, Expand);
587 setOperationAction(ISD::ROTR, (MVT::SimpleValueType)VT, Expand);
588 setOperationAction(ISD::BSWAP, (MVT::SimpleValueType)VT, Expand);
589 setOperationAction(ISD::VSETCC, (MVT::SimpleValueType)VT, Expand);
590 setOperationAction(ISD::FLOG, (MVT::SimpleValueType)VT, Expand);
591 setOperationAction(ISD::FLOG2, (MVT::SimpleValueType)VT, Expand);
592 setOperationAction(ISD::FLOG10, (MVT::SimpleValueType)VT, Expand);
593 setOperationAction(ISD::FEXP, (MVT::SimpleValueType)VT, Expand);
594 setOperationAction(ISD::FEXP2, (MVT::SimpleValueType)VT, Expand);
595 setOperationAction(ISD::FP_TO_UINT, (MVT::SimpleValueType)VT, Expand);
596 setOperationAction(ISD::FP_TO_SINT, (MVT::SimpleValueType)VT, Expand);
597 setOperationAction(ISD::UINT_TO_FP, (MVT::SimpleValueType)VT, Expand);
598 setOperationAction(ISD::SINT_TO_FP, (MVT::SimpleValueType)VT, Expand);
599 setOperationAction(ISD::SIGN_EXTEND_INREG, (MVT::SimpleValueType)VT,Expand);
600 setOperationAction(ISD::TRUNCATE, (MVT::SimpleValueType)VT, Expand);
601 setOperationAction(ISD::SIGN_EXTEND, (MVT::SimpleValueType)VT, Expand);
602 setOperationAction(ISD::ZERO_EXTEND, (MVT::SimpleValueType)VT, Expand);
603 setOperationAction(ISD::ANY_EXTEND, (MVT::SimpleValueType)VT, Expand);
604 for (unsigned InnerVT = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
605 InnerVT <= (unsigned)MVT::LAST_VECTOR_VALUETYPE; ++InnerVT)
606 setTruncStoreAction((MVT::SimpleValueType)VT,
607 (MVT::SimpleValueType)InnerVT, Expand);
608 setLoadExtAction(ISD::SEXTLOAD, (MVT::SimpleValueType)VT, Expand);
609 setLoadExtAction(ISD::ZEXTLOAD, (MVT::SimpleValueType)VT, Expand);
610 setLoadExtAction(ISD::EXTLOAD, (MVT::SimpleValueType)VT, Expand);
613 // FIXME: In order to prevent SSE instructions being expanded to MMX ones
614 // with -msoft-float, disable use of MMX as well.
615 if (!UseSoftFloat && !DisableMMX && Subtarget->hasMMX()) {
616 addRegisterClass(MVT::v8i8, X86::VR64RegisterClass, false);
617 addRegisterClass(MVT::v4i16, X86::VR64RegisterClass, false);
618 addRegisterClass(MVT::v2i32, X86::VR64RegisterClass, false);
620 addRegisterClass(MVT::v1i64, X86::VR64RegisterClass, false);
622 setOperationAction(ISD::ADD, MVT::v8i8, Legal);
623 setOperationAction(ISD::ADD, MVT::v4i16, Legal);
624 setOperationAction(ISD::ADD, MVT::v2i32, Legal);
625 setOperationAction(ISD::ADD, MVT::v1i64, Legal);
627 setOperationAction(ISD::SUB, MVT::v8i8, Legal);
628 setOperationAction(ISD::SUB, MVT::v4i16, Legal);
629 setOperationAction(ISD::SUB, MVT::v2i32, Legal);
630 setOperationAction(ISD::SUB, MVT::v1i64, Legal);
632 setOperationAction(ISD::MULHS, MVT::v4i16, Legal);
633 setOperationAction(ISD::MUL, MVT::v4i16, Legal);
635 setOperationAction(ISD::AND, MVT::v8i8, Promote);
636 AddPromotedToType (ISD::AND, MVT::v8i8, MVT::v1i64);
637 setOperationAction(ISD::AND, MVT::v4i16, Promote);
638 AddPromotedToType (ISD::AND, MVT::v4i16, MVT::v1i64);
639 setOperationAction(ISD::AND, MVT::v2i32, Promote);
640 AddPromotedToType (ISD::AND, MVT::v2i32, MVT::v1i64);
641 setOperationAction(ISD::AND, MVT::v1i64, Legal);
643 setOperationAction(ISD::OR, MVT::v8i8, Promote);
644 AddPromotedToType (ISD::OR, MVT::v8i8, MVT::v1i64);
645 setOperationAction(ISD::OR, MVT::v4i16, Promote);
646 AddPromotedToType (ISD::OR, MVT::v4i16, MVT::v1i64);
647 setOperationAction(ISD::OR, MVT::v2i32, Promote);
648 AddPromotedToType (ISD::OR, MVT::v2i32, MVT::v1i64);
649 setOperationAction(ISD::OR, MVT::v1i64, Legal);
651 setOperationAction(ISD::XOR, MVT::v8i8, Promote);
652 AddPromotedToType (ISD::XOR, MVT::v8i8, MVT::v1i64);
653 setOperationAction(ISD::XOR, MVT::v4i16, Promote);
654 AddPromotedToType (ISD::XOR, MVT::v4i16, MVT::v1i64);
655 setOperationAction(ISD::XOR, MVT::v2i32, Promote);
656 AddPromotedToType (ISD::XOR, MVT::v2i32, MVT::v1i64);
657 setOperationAction(ISD::XOR, MVT::v1i64, Legal);
659 setOperationAction(ISD::LOAD, MVT::v8i8, Promote);
660 AddPromotedToType (ISD::LOAD, MVT::v8i8, MVT::v1i64);
661 setOperationAction(ISD::LOAD, MVT::v4i16, Promote);
662 AddPromotedToType (ISD::LOAD, MVT::v4i16, MVT::v1i64);
663 setOperationAction(ISD::LOAD, MVT::v2i32, Promote);
664 AddPromotedToType (ISD::LOAD, MVT::v2i32, MVT::v1i64);
665 setOperationAction(ISD::LOAD, MVT::v1i64, Legal);
667 setOperationAction(ISD::BUILD_VECTOR, MVT::v8i8, Custom);
668 setOperationAction(ISD::BUILD_VECTOR, MVT::v4i16, Custom);
669 setOperationAction(ISD::BUILD_VECTOR, MVT::v2i32, Custom);
670 setOperationAction(ISD::BUILD_VECTOR, MVT::v1i64, Custom);
672 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v8i8, Custom);
673 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v4i16, Custom);
674 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2i32, Custom);
675 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v1i64, Custom);
677 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v8i8, Custom);
678 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v4i16, Custom);
679 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v1i64, Custom);
681 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4i16, Custom);
683 setOperationAction(ISD::SELECT, MVT::v8i8, Promote);
684 setOperationAction(ISD::SELECT, MVT::v4i16, Promote);
685 setOperationAction(ISD::SELECT, MVT::v2i32, Promote);
686 setOperationAction(ISD::SELECT, MVT::v1i64, Custom);
687 setOperationAction(ISD::VSETCC, MVT::v8i8, Custom);
688 setOperationAction(ISD::VSETCC, MVT::v4i16, Custom);
689 setOperationAction(ISD::VSETCC, MVT::v2i32, Custom);
691 if (!X86ScalarSSEf64 && Subtarget->is64Bit()) {
692 setOperationAction(ISD::BIT_CONVERT, MVT::v8i8, Custom);
693 setOperationAction(ISD::BIT_CONVERT, MVT::v4i16, Custom);
694 setOperationAction(ISD::BIT_CONVERT, MVT::v2i32, Custom);
695 setOperationAction(ISD::BIT_CONVERT, MVT::v1i64, Custom);
699 if (!UseSoftFloat && Subtarget->hasSSE1()) {
700 addRegisterClass(MVT::v4f32, X86::VR128RegisterClass);
702 setOperationAction(ISD::FADD, MVT::v4f32, Legal);
703 setOperationAction(ISD::FSUB, MVT::v4f32, Legal);
704 setOperationAction(ISD::FMUL, MVT::v4f32, Legal);
705 setOperationAction(ISD::FDIV, MVT::v4f32, Legal);
706 setOperationAction(ISD::FSQRT, MVT::v4f32, Legal);
707 setOperationAction(ISD::FNEG, MVT::v4f32, Custom);
708 setOperationAction(ISD::LOAD, MVT::v4f32, Legal);
709 setOperationAction(ISD::BUILD_VECTOR, MVT::v4f32, Custom);
710 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v4f32, Custom);
711 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4f32, Custom);
712 setOperationAction(ISD::SELECT, MVT::v4f32, Custom);
713 setOperationAction(ISD::VSETCC, MVT::v4f32, Custom);
716 if (!UseSoftFloat && Subtarget->hasSSE2()) {
717 addRegisterClass(MVT::v2f64, X86::VR128RegisterClass);
719 // FIXME: Unfortunately -soft-float and -no-implicit-float means XMM
720 // registers cannot be used even for integer operations.
721 addRegisterClass(MVT::v16i8, X86::VR128RegisterClass);
722 addRegisterClass(MVT::v8i16, X86::VR128RegisterClass);
723 addRegisterClass(MVT::v4i32, X86::VR128RegisterClass);
724 addRegisterClass(MVT::v2i64, X86::VR128RegisterClass);
726 setOperationAction(ISD::ADD, MVT::v16i8, Legal);
727 setOperationAction(ISD::ADD, MVT::v8i16, Legal);
728 setOperationAction(ISD::ADD, MVT::v4i32, Legal);
729 setOperationAction(ISD::ADD, MVT::v2i64, Legal);
730 setOperationAction(ISD::MUL, MVT::v2i64, Custom);
731 setOperationAction(ISD::SUB, MVT::v16i8, Legal);
732 setOperationAction(ISD::SUB, MVT::v8i16, Legal);
733 setOperationAction(ISD::SUB, MVT::v4i32, Legal);
734 setOperationAction(ISD::SUB, MVT::v2i64, Legal);
735 setOperationAction(ISD::MUL, MVT::v8i16, Legal);
736 setOperationAction(ISD::FADD, MVT::v2f64, Legal);
737 setOperationAction(ISD::FSUB, MVT::v2f64, Legal);
738 setOperationAction(ISD::FMUL, MVT::v2f64, Legal);
739 setOperationAction(ISD::FDIV, MVT::v2f64, Legal);
740 setOperationAction(ISD::FSQRT, MVT::v2f64, Legal);
741 setOperationAction(ISD::FNEG, MVT::v2f64, Custom);
743 setOperationAction(ISD::VSETCC, MVT::v2f64, Custom);
744 setOperationAction(ISD::VSETCC, MVT::v16i8, Custom);
745 setOperationAction(ISD::VSETCC, MVT::v8i16, Custom);
746 setOperationAction(ISD::VSETCC, MVT::v4i32, Custom);
748 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v16i8, Custom);
749 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v8i16, Custom);
750 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8i16, Custom);
751 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4i32, Custom);
752 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4f32, Custom);
754 setOperationAction(ISD::CONCAT_VECTORS, MVT::v2f64, Custom);
755 setOperationAction(ISD::CONCAT_VECTORS, MVT::v2i64, Custom);
756 setOperationAction(ISD::CONCAT_VECTORS, MVT::v16i8, Custom);
757 setOperationAction(ISD::CONCAT_VECTORS, MVT::v8i16, Custom);
758 setOperationAction(ISD::CONCAT_VECTORS, MVT::v4i32, Custom);
760 // Custom lower build_vector, vector_shuffle, and extract_vector_elt.
761 for (unsigned i = (unsigned)MVT::v16i8; i != (unsigned)MVT::v2i64; ++i) {
762 EVT VT = (MVT::SimpleValueType)i;
763 // Do not attempt to custom lower non-power-of-2 vectors
764 if (!isPowerOf2_32(VT.getVectorNumElements()))
766 // Do not attempt to custom lower non-128-bit vectors
767 if (!VT.is128BitVector())
769 setOperationAction(ISD::BUILD_VECTOR,
770 VT.getSimpleVT().SimpleTy, Custom);
771 setOperationAction(ISD::VECTOR_SHUFFLE,
772 VT.getSimpleVT().SimpleTy, Custom);
773 setOperationAction(ISD::EXTRACT_VECTOR_ELT,
774 VT.getSimpleVT().SimpleTy, Custom);
777 setOperationAction(ISD::BUILD_VECTOR, MVT::v2f64, Custom);
778 setOperationAction(ISD::BUILD_VECTOR, MVT::v2i64, Custom);
779 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2f64, Custom);
780 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2i64, Custom);
781 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2f64, Custom);
782 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2f64, Custom);
784 if (Subtarget->is64Bit()) {
785 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2i64, Custom);
786 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2i64, Custom);
789 // Promote v16i8, v8i16, v4i32 load, select, and, or, xor to v2i64.
790 for (unsigned i = (unsigned)MVT::v16i8; i != (unsigned)MVT::v2i64; i++) {
791 MVT::SimpleValueType SVT = (MVT::SimpleValueType)i;
794 // Do not attempt to promote non-128-bit vectors
795 if (!VT.is128BitVector())
798 setOperationAction(ISD::AND, SVT, Promote);
799 AddPromotedToType (ISD::AND, SVT, MVT::v2i64);
800 setOperationAction(ISD::OR, SVT, Promote);
801 AddPromotedToType (ISD::OR, SVT, MVT::v2i64);
802 setOperationAction(ISD::XOR, SVT, Promote);
803 AddPromotedToType (ISD::XOR, SVT, MVT::v2i64);
804 setOperationAction(ISD::LOAD, SVT, Promote);
805 AddPromotedToType (ISD::LOAD, SVT, MVT::v2i64);
806 setOperationAction(ISD::SELECT, SVT, Promote);
807 AddPromotedToType (ISD::SELECT, SVT, MVT::v2i64);
810 setTruncStoreAction(MVT::f64, MVT::f32, Expand);
812 // Custom lower v2i64 and v2f64 selects.
813 setOperationAction(ISD::LOAD, MVT::v2f64, Legal);
814 setOperationAction(ISD::LOAD, MVT::v2i64, Legal);
815 setOperationAction(ISD::SELECT, MVT::v2f64, Custom);
816 setOperationAction(ISD::SELECT, MVT::v2i64, Custom);
818 setOperationAction(ISD::FP_TO_SINT, MVT::v4i32, Legal);
819 setOperationAction(ISD::SINT_TO_FP, MVT::v4i32, Legal);
820 if (!DisableMMX && Subtarget->hasMMX()) {
821 setOperationAction(ISD::FP_TO_SINT, MVT::v2i32, Custom);
822 setOperationAction(ISD::SINT_TO_FP, MVT::v2i32, Custom);
826 if (Subtarget->hasSSE41()) {
827 setOperationAction(ISD::FFLOOR, MVT::f32, Legal);
828 setOperationAction(ISD::FCEIL, MVT::f32, Legal);
829 setOperationAction(ISD::FTRUNC, MVT::f32, Legal);
830 setOperationAction(ISD::FRINT, MVT::f32, Legal);
831 setOperationAction(ISD::FNEARBYINT, MVT::f32, Legal);
832 setOperationAction(ISD::FFLOOR, MVT::f64, Legal);
833 setOperationAction(ISD::FCEIL, MVT::f64, Legal);
834 setOperationAction(ISD::FTRUNC, MVT::f64, Legal);
835 setOperationAction(ISD::FRINT, MVT::f64, Legal);
836 setOperationAction(ISD::FNEARBYINT, MVT::f64, Legal);
838 // FIXME: Do we need to handle scalar-to-vector here?
839 setOperationAction(ISD::MUL, MVT::v4i32, Legal);
841 // Can turn SHL into an integer multiply.
842 setOperationAction(ISD::SHL, MVT::v4i32, Custom);
843 setOperationAction(ISD::SHL, MVT::v16i8, Custom);
845 // i8 and i16 vectors are custom , because the source register and source
846 // source memory operand types are not the same width. f32 vectors are
847 // custom since the immediate controlling the insert encodes additional
849 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v16i8, Custom);
850 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8i16, Custom);
851 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4i32, Custom);
852 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4f32, Custom);
854 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v16i8, Custom);
855 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v8i16, Custom);
856 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4i32, Custom);
857 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4f32, Custom);
859 if (Subtarget->is64Bit()) {
860 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2i64, Legal);
861 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2i64, Legal);
865 if (Subtarget->hasSSE42()) {
866 setOperationAction(ISD::VSETCC, MVT::v2i64, Custom);
869 if (!UseSoftFloat && Subtarget->hasAVX()) {
870 addRegisterClass(MVT::v8f32, X86::VR256RegisterClass);
871 addRegisterClass(MVT::v4f64, X86::VR256RegisterClass);
872 addRegisterClass(MVT::v8i32, X86::VR256RegisterClass);
873 addRegisterClass(MVT::v4i64, X86::VR256RegisterClass);
874 addRegisterClass(MVT::v32i8, X86::VR256RegisterClass);
876 setOperationAction(ISD::LOAD, MVT::v8f32, Legal);
877 setOperationAction(ISD::LOAD, MVT::v8i32, Legal);
878 setOperationAction(ISD::LOAD, MVT::v4f64, Legal);
879 setOperationAction(ISD::LOAD, MVT::v4i64, Legal);
880 setOperationAction(ISD::FADD, MVT::v8f32, Legal);
881 setOperationAction(ISD::FSUB, MVT::v8f32, Legal);
882 setOperationAction(ISD::FMUL, MVT::v8f32, Legal);
883 setOperationAction(ISD::FDIV, MVT::v8f32, Legal);
884 setOperationAction(ISD::FSQRT, MVT::v8f32, Legal);
885 setOperationAction(ISD::FNEG, MVT::v8f32, Custom);
886 setOperationAction(ISD::BUILD_VECTOR, MVT::v8f32, Custom);
887 //setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v8f32, Custom);
888 //setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v8f32, Custom);
889 //setOperationAction(ISD::SELECT, MVT::v8f32, Custom);
890 //setOperationAction(ISD::VSETCC, MVT::v8f32, Custom);
892 // Operations to consider commented out -v16i16 v32i8
893 //setOperationAction(ISD::ADD, MVT::v16i16, Legal);
894 setOperationAction(ISD::ADD, MVT::v8i32, Custom);
895 setOperationAction(ISD::ADD, MVT::v4i64, Custom);
896 //setOperationAction(ISD::SUB, MVT::v32i8, Legal);
897 //setOperationAction(ISD::SUB, MVT::v16i16, Legal);
898 setOperationAction(ISD::SUB, MVT::v8i32, Custom);
899 setOperationAction(ISD::SUB, MVT::v4i64, Custom);
900 //setOperationAction(ISD::MUL, MVT::v16i16, Legal);
901 setOperationAction(ISD::FADD, MVT::v4f64, Legal);
902 setOperationAction(ISD::FSUB, MVT::v4f64, Legal);
903 setOperationAction(ISD::FMUL, MVT::v4f64, Legal);
904 setOperationAction(ISD::FDIV, MVT::v4f64, Legal);
905 setOperationAction(ISD::FSQRT, MVT::v4f64, Legal);
906 setOperationAction(ISD::FNEG, MVT::v4f64, Custom);
908 setOperationAction(ISD::VSETCC, MVT::v4f64, Custom);
909 // setOperationAction(ISD::VSETCC, MVT::v32i8, Custom);
910 // setOperationAction(ISD::VSETCC, MVT::v16i16, Custom);
911 setOperationAction(ISD::VSETCC, MVT::v8i32, Custom);
913 // setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v32i8, Custom);
914 // setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v16i16, Custom);
915 // setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v16i16, Custom);
916 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8i32, Custom);
917 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8f32, Custom);
919 setOperationAction(ISD::BUILD_VECTOR, MVT::v4f64, Custom);
920 setOperationAction(ISD::BUILD_VECTOR, MVT::v4i64, Custom);
921 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v4f64, Custom);
922 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v4i64, Custom);
923 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4f64, Custom);
924 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4f64, Custom);
927 // Not sure we want to do this since there are no 256-bit integer
930 // Custom lower build_vector, vector_shuffle, and extract_vector_elt.
931 // This includes 256-bit vectors
932 for (unsigned i = (unsigned)MVT::v16i8; i != (unsigned)MVT::v4i64; ++i) {
933 EVT VT = (MVT::SimpleValueType)i;
935 // Do not attempt to custom lower non-power-of-2 vectors
936 if (!isPowerOf2_32(VT.getVectorNumElements()))
939 setOperationAction(ISD::BUILD_VECTOR, VT, Custom);
940 setOperationAction(ISD::VECTOR_SHUFFLE, VT, Custom);
941 setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Custom);
944 if (Subtarget->is64Bit()) {
945 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4i64, Custom);
946 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4i64, Custom);
951 // Not sure we want to do this since there are no 256-bit integer
954 // Promote v32i8, v16i16, v8i32 load, select, and, or, xor to v4i64.
955 // Including 256-bit vectors
956 for (unsigned i = (unsigned)MVT::v16i8; i != (unsigned)MVT::v4i64; i++) {
957 EVT VT = (MVT::SimpleValueType)i;
959 if (!VT.is256BitVector()) {
962 setOperationAction(ISD::AND, VT, Promote);
963 AddPromotedToType (ISD::AND, VT, MVT::v4i64);
964 setOperationAction(ISD::OR, VT, Promote);
965 AddPromotedToType (ISD::OR, VT, MVT::v4i64);
966 setOperationAction(ISD::XOR, VT, Promote);
967 AddPromotedToType (ISD::XOR, VT, MVT::v4i64);
968 setOperationAction(ISD::LOAD, VT, Promote);
969 AddPromotedToType (ISD::LOAD, VT, MVT::v4i64);
970 setOperationAction(ISD::SELECT, VT, Promote);
971 AddPromotedToType (ISD::SELECT, VT, MVT::v4i64);
974 setTruncStoreAction(MVT::f64, MVT::f32, Expand);
978 // We want to custom lower some of our intrinsics.
979 setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
981 // Add/Sub/Mul with overflow operations are custom lowered.
982 setOperationAction(ISD::SADDO, MVT::i32, Custom);
983 setOperationAction(ISD::UADDO, MVT::i32, Custom);
984 setOperationAction(ISD::SSUBO, MVT::i32, Custom);
985 setOperationAction(ISD::USUBO, MVT::i32, Custom);
986 setOperationAction(ISD::SMULO, MVT::i32, Custom);
988 // Only custom-lower 64-bit SADDO and friends on 64-bit because we don't
989 // handle type legalization for these operations here.
991 // FIXME: We really should do custom legalization for addition and
992 // subtraction on x86-32 once PR3203 is fixed. We really can't do much better
993 // than generic legalization for 64-bit multiplication-with-overflow, though.
994 if (Subtarget->is64Bit()) {
995 setOperationAction(ISD::SADDO, MVT::i64, Custom);
996 setOperationAction(ISD::UADDO, MVT::i64, Custom);
997 setOperationAction(ISD::SSUBO, MVT::i64, Custom);
998 setOperationAction(ISD::USUBO, MVT::i64, Custom);
999 setOperationAction(ISD::SMULO, MVT::i64, Custom);
1002 if (!Subtarget->is64Bit()) {
1003 // These libcalls are not available in 32-bit.
1004 setLibcallName(RTLIB::SHL_I128, 0);
1005 setLibcallName(RTLIB::SRL_I128, 0);
1006 setLibcallName(RTLIB::SRA_I128, 0);
1009 // We have target-specific dag combine patterns for the following nodes:
1010 setTargetDAGCombine(ISD::VECTOR_SHUFFLE);
1011 setTargetDAGCombine(ISD::EXTRACT_VECTOR_ELT);
1012 setTargetDAGCombine(ISD::BUILD_VECTOR);
1013 setTargetDAGCombine(ISD::SELECT);
1014 setTargetDAGCombine(ISD::SHL);
1015 setTargetDAGCombine(ISD::SRA);
1016 setTargetDAGCombine(ISD::SRL);
1017 setTargetDAGCombine(ISD::OR);
1018 setTargetDAGCombine(ISD::STORE);
1019 setTargetDAGCombine(ISD::ZERO_EXTEND);
1020 if (Subtarget->is64Bit())
1021 setTargetDAGCombine(ISD::MUL);
1023 computeRegisterProperties();
1025 // FIXME: These should be based on subtarget info. Plus, the values should
1026 // be smaller when we are in optimizing for size mode.
1027 maxStoresPerMemset = 16; // For @llvm.memset -> sequence of stores
1028 maxStoresPerMemcpy = 8; // For @llvm.memcpy -> sequence of stores
1029 maxStoresPerMemmove = 3; // For @llvm.memmove -> sequence of stores
1030 setPrefLoopAlignment(16);
1031 benefitFromCodePlacementOpt = true;
1035 MVT::SimpleValueType X86TargetLowering::getSetCCResultType(EVT VT) const {
1040 /// getMaxByValAlign - Helper for getByValTypeAlignment to determine
1041 /// the desired ByVal argument alignment.
1042 static void getMaxByValAlign(const Type *Ty, unsigned &MaxAlign) {
1045 if (const VectorType *VTy = dyn_cast<VectorType>(Ty)) {
1046 if (VTy->getBitWidth() == 128)
1048 } else if (const ArrayType *ATy = dyn_cast<ArrayType>(Ty)) {
1049 unsigned EltAlign = 0;
1050 getMaxByValAlign(ATy->getElementType(), EltAlign);
1051 if (EltAlign > MaxAlign)
1052 MaxAlign = EltAlign;
1053 } else if (const StructType *STy = dyn_cast<StructType>(Ty)) {
1054 for (unsigned i = 0, e = STy->getNumElements(); i != e; ++i) {
1055 unsigned EltAlign = 0;
1056 getMaxByValAlign(STy->getElementType(i), EltAlign);
1057 if (EltAlign > MaxAlign)
1058 MaxAlign = EltAlign;
1066 /// getByValTypeAlignment - Return the desired alignment for ByVal aggregate
1067 /// function arguments in the caller parameter area. For X86, aggregates
1068 /// that contain SSE vectors are placed at 16-byte boundaries while the rest
1069 /// are at 4-byte boundaries.
1070 unsigned X86TargetLowering::getByValTypeAlignment(const Type *Ty) const {
1071 if (Subtarget->is64Bit()) {
1072 // Max of 8 and alignment of type.
1073 unsigned TyAlign = TD->getABITypeAlignment(Ty);
1080 if (Subtarget->hasSSE1())
1081 getMaxByValAlign(Ty, Align);
1085 /// getOptimalMemOpType - Returns the target specific optimal type for load
1086 /// and store operations as a result of memset, memcpy, and memmove
1087 /// lowering. If DstAlign is zero that means it's safe to destination
1088 /// alignment can satisfy any constraint. Similarly if SrcAlign is zero it
1089 /// means there isn't a need to check it against alignment requirement,
1090 /// probably because the source does not need to be loaded. If
1091 /// 'NonScalarIntSafe' is true, that means it's safe to return a
1092 /// non-scalar-integer type, e.g. empty string source, constant, or loaded
1093 /// from memory. 'MemcpyStrSrc' indicates whether the memcpy source is
1094 /// constant so it does not need to be loaded.
1095 /// It returns EVT::Other if the type should be determined using generic
1096 /// target-independent logic.
1098 X86TargetLowering::getOptimalMemOpType(uint64_t Size,
1099 unsigned DstAlign, unsigned SrcAlign,
1100 bool NonScalarIntSafe,
1102 MachineFunction &MF) const {
1103 // FIXME: This turns off use of xmm stores for memset/memcpy on targets like
1104 // linux. This is because the stack realignment code can't handle certain
1105 // cases like PR2962. This should be removed when PR2962 is fixed.
1106 const Function *F = MF.getFunction();
1107 if (NonScalarIntSafe &&
1108 !F->hasFnAttr(Attribute::NoImplicitFloat)) {
1110 (Subtarget->isUnalignedMemAccessFast() ||
1111 ((DstAlign == 0 || DstAlign >= 16) &&
1112 (SrcAlign == 0 || SrcAlign >= 16))) &&
1113 Subtarget->getStackAlignment() >= 16) {
1114 if (Subtarget->hasSSE2())
1116 if (Subtarget->hasSSE1())
1118 } else if (!MemcpyStrSrc && Size >= 8 &&
1119 !Subtarget->is64Bit() &&
1120 Subtarget->getStackAlignment() >= 8 &&
1121 Subtarget->hasSSE2()) {
1122 // Do not use f64 to lower memcpy if source is string constant. It's
1123 // better to use i32 to avoid the loads.
1127 if (Subtarget->is64Bit() && Size >= 8)
1132 /// getJumpTableEncoding - Return the entry encoding for a jump table in the
1133 /// current function. The returned value is a member of the
1134 /// MachineJumpTableInfo::JTEntryKind enum.
1135 unsigned X86TargetLowering::getJumpTableEncoding() const {
1136 // In GOT pic mode, each entry in the jump table is emitted as a @GOTOFF
1138 if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
1139 Subtarget->isPICStyleGOT())
1140 return MachineJumpTableInfo::EK_Custom32;
1142 // Otherwise, use the normal jump table encoding heuristics.
1143 return TargetLowering::getJumpTableEncoding();
1146 /// getPICBaseSymbol - Return the X86-32 PIC base.
1148 X86TargetLowering::getPICBaseSymbol(const MachineFunction *MF,
1149 MCContext &Ctx) const {
1150 const MCAsmInfo &MAI = *getTargetMachine().getMCAsmInfo();
1151 return Ctx.GetOrCreateSymbol(Twine(MAI.getPrivateGlobalPrefix())+
1152 Twine(MF->getFunctionNumber())+"$pb");
1157 X86TargetLowering::LowerCustomJumpTableEntry(const MachineJumpTableInfo *MJTI,
1158 const MachineBasicBlock *MBB,
1159 unsigned uid,MCContext &Ctx) const{
1160 assert(getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
1161 Subtarget->isPICStyleGOT());
1162 // In 32-bit ELF systems, our jump table entries are formed with @GOTOFF
1164 return MCSymbolRefExpr::Create(MBB->getSymbol(),
1165 MCSymbolRefExpr::VK_GOTOFF, Ctx);
1168 /// getPICJumpTableRelocaBase - Returns relocation base for the given PIC
1170 SDValue X86TargetLowering::getPICJumpTableRelocBase(SDValue Table,
1171 SelectionDAG &DAG) const {
1172 if (!Subtarget->is64Bit())
1173 // This doesn't have DebugLoc associated with it, but is not really the
1174 // same as a Register.
1175 return DAG.getNode(X86ISD::GlobalBaseReg, DebugLoc(), getPointerTy());
1179 /// getPICJumpTableRelocBaseExpr - This returns the relocation base for the
1180 /// given PIC jumptable, the same as getPICJumpTableRelocBase, but as an
1182 const MCExpr *X86TargetLowering::
1183 getPICJumpTableRelocBaseExpr(const MachineFunction *MF, unsigned JTI,
1184 MCContext &Ctx) const {
1185 // X86-64 uses RIP relative addressing based on the jump table label.
1186 if (Subtarget->isPICStyleRIPRel())
1187 return TargetLowering::getPICJumpTableRelocBaseExpr(MF, JTI, Ctx);
1189 // Otherwise, the reference is relative to the PIC base.
1190 return MCSymbolRefExpr::Create(getPICBaseSymbol(MF, Ctx), Ctx);
1193 /// getFunctionAlignment - Return the Log2 alignment of this function.
1194 unsigned X86TargetLowering::getFunctionAlignment(const Function *F) const {
1195 return F->hasFnAttr(Attribute::OptimizeForSize) ? 0 : 4;
1198 std::pair<const TargetRegisterClass*, uint8_t>
1199 X86TargetLowering::findRepresentativeClass(EVT VT) const{
1200 const TargetRegisterClass *RRC = 0;
1202 switch (VT.getSimpleVT().SimpleTy) {
1204 return TargetLowering::findRepresentativeClass(VT);
1205 case MVT::i8: case MVT::i16: case MVT::i32: case MVT::i64:
1206 RRC = (Subtarget->is64Bit()
1207 ? X86::GR64RegisterClass : X86::GR32RegisterClass);
1209 case MVT::v8i8: case MVT::v4i16:
1210 case MVT::v2i32: case MVT::v1i64:
1211 RRC = X86::VR64RegisterClass;
1213 case MVT::f32: case MVT::f64:
1214 case MVT::v16i8: case MVT::v8i16: case MVT::v4i32: case MVT::v2i64:
1215 case MVT::v4f32: case MVT::v2f64:
1216 case MVT::v32i8: case MVT::v8i32: case MVT::v4i64: case MVT::v8f32:
1218 RRC = X86::VR128RegisterClass;
1221 return std::make_pair(RRC, Cost);
1225 X86TargetLowering::getRegPressureLimit(const TargetRegisterClass *RC,
1226 MachineFunction &MF) const {
1227 unsigned FPDiff = RegInfo->hasFP(MF) ? 1 : 0;
1228 switch (RC->getID()) {
1231 case X86::GR32RegClassID:
1233 case X86::GR64RegClassID:
1235 case X86::VR128RegClassID:
1236 return Subtarget->is64Bit() ? 10 : 4;
1237 case X86::VR64RegClassID:
1242 bool X86TargetLowering::getStackCookieLocation(unsigned &AddressSpace,
1243 unsigned &Offset) const {
1244 if (!Subtarget->isTargetLinux())
1247 if (Subtarget->is64Bit()) {
1248 // %fs:0x28, unless we're using a Kernel code model, in which case it's %gs:
1250 if (getTargetMachine().getCodeModel() == CodeModel::Kernel)
1263 //===----------------------------------------------------------------------===//
1264 // Return Value Calling Convention Implementation
1265 //===----------------------------------------------------------------------===//
1267 #include "X86GenCallingConv.inc"
1270 X86TargetLowering::CanLowerReturn(CallingConv::ID CallConv, bool isVarArg,
1271 const SmallVectorImpl<ISD::OutputArg> &Outs,
1272 LLVMContext &Context) const {
1273 SmallVector<CCValAssign, 16> RVLocs;
1274 CCState CCInfo(CallConv, isVarArg, getTargetMachine(),
1276 return CCInfo.CheckReturn(Outs, RetCC_X86);
1280 X86TargetLowering::LowerReturn(SDValue Chain,
1281 CallingConv::ID CallConv, bool isVarArg,
1282 const SmallVectorImpl<ISD::OutputArg> &Outs,
1283 const SmallVectorImpl<SDValue> &OutVals,
1284 DebugLoc dl, SelectionDAG &DAG) const {
1285 MachineFunction &MF = DAG.getMachineFunction();
1286 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
1288 SmallVector<CCValAssign, 16> RVLocs;
1289 CCState CCInfo(CallConv, isVarArg, getTargetMachine(),
1290 RVLocs, *DAG.getContext());
1291 CCInfo.AnalyzeReturn(Outs, RetCC_X86);
1293 // Add the regs to the liveout set for the function.
1294 MachineRegisterInfo &MRI = DAG.getMachineFunction().getRegInfo();
1295 for (unsigned i = 0; i != RVLocs.size(); ++i)
1296 if (RVLocs[i].isRegLoc() && !MRI.isLiveOut(RVLocs[i].getLocReg()))
1297 MRI.addLiveOut(RVLocs[i].getLocReg());
1301 SmallVector<SDValue, 6> RetOps;
1302 RetOps.push_back(Chain); // Operand #0 = Chain (updated below)
1303 // Operand #1 = Bytes To Pop
1304 RetOps.push_back(DAG.getTargetConstant(FuncInfo->getBytesToPopOnReturn(),
1307 // Copy the result values into the output registers.
1308 for (unsigned i = 0; i != RVLocs.size(); ++i) {
1309 CCValAssign &VA = RVLocs[i];
1310 assert(VA.isRegLoc() && "Can only return in registers!");
1311 SDValue ValToCopy = OutVals[i];
1312 EVT ValVT = ValToCopy.getValueType();
1314 // If this is x86-64, and we disabled SSE, we can't return FP values
1315 if ((ValVT == MVT::f32 || ValVT == MVT::f64) &&
1316 (Subtarget->is64Bit() && !Subtarget->hasSSE1())) {
1317 report_fatal_error("SSE register return with SSE disabled");
1319 // Likewise we can't return F64 values with SSE1 only. gcc does so, but
1320 // llvm-gcc has never done it right and no one has noticed, so this
1321 // should be OK for now.
1322 if (ValVT == MVT::f64 &&
1323 (Subtarget->is64Bit() && !Subtarget->hasSSE2()))
1324 report_fatal_error("SSE2 register return with SSE2 disabled");
1326 // Returns in ST0/ST1 are handled specially: these are pushed as operands to
1327 // the RET instruction and handled by the FP Stackifier.
1328 if (VA.getLocReg() == X86::ST0 ||
1329 VA.getLocReg() == X86::ST1) {
1330 // If this is a copy from an xmm register to ST(0), use an FPExtend to
1331 // change the value to the FP stack register class.
1332 if (isScalarFPTypeInSSEReg(VA.getValVT()))
1333 ValToCopy = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f80, ValToCopy);
1334 RetOps.push_back(ValToCopy);
1335 // Don't emit a copytoreg.
1339 // 64-bit vector (MMX) values are returned in XMM0 / XMM1 except for v1i64
1340 // which is returned in RAX / RDX.
1341 if (Subtarget->is64Bit()) {
1342 if (ValVT.isVector() && ValVT.getSizeInBits() == 64) {
1343 ValToCopy = DAG.getNode(ISD::BIT_CONVERT, dl, MVT::i64, ValToCopy);
1344 if (VA.getLocReg() == X86::XMM0 || VA.getLocReg() == X86::XMM1) {
1345 ValToCopy = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2i64,
1348 // If we don't have SSE2 available, convert to v4f32 so the generated
1349 // register is legal.
1350 if (!Subtarget->hasSSE2())
1351 ValToCopy = DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v4f32,ValToCopy);
1356 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), ValToCopy, Flag);
1357 Flag = Chain.getValue(1);
1360 // The x86-64 ABI for returning structs by value requires that we copy
1361 // the sret argument into %rax for the return. We saved the argument into
1362 // a virtual register in the entry block, so now we copy the value out
1364 if (Subtarget->is64Bit() &&
1365 DAG.getMachineFunction().getFunction()->hasStructRetAttr()) {
1366 MachineFunction &MF = DAG.getMachineFunction();
1367 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
1368 unsigned Reg = FuncInfo->getSRetReturnReg();
1370 "SRetReturnReg should have been set in LowerFormalArguments().");
1371 SDValue Val = DAG.getCopyFromReg(Chain, dl, Reg, getPointerTy());
1373 Chain = DAG.getCopyToReg(Chain, dl, X86::RAX, Val, Flag);
1374 Flag = Chain.getValue(1);
1376 // RAX now acts like a return value.
1377 MRI.addLiveOut(X86::RAX);
1380 RetOps[0] = Chain; // Update chain.
1382 // Add the flag if we have it.
1384 RetOps.push_back(Flag);
1386 return DAG.getNode(X86ISD::RET_FLAG, dl,
1387 MVT::Other, &RetOps[0], RetOps.size());
1390 /// LowerCallResult - Lower the result values of a call into the
1391 /// appropriate copies out of appropriate physical registers.
1394 X86TargetLowering::LowerCallResult(SDValue Chain, SDValue InFlag,
1395 CallingConv::ID CallConv, bool isVarArg,
1396 const SmallVectorImpl<ISD::InputArg> &Ins,
1397 DebugLoc dl, SelectionDAG &DAG,
1398 SmallVectorImpl<SDValue> &InVals) const {
1400 // Assign locations to each value returned by this call.
1401 SmallVector<CCValAssign, 16> RVLocs;
1402 bool Is64Bit = Subtarget->is64Bit();
1403 CCState CCInfo(CallConv, isVarArg, getTargetMachine(),
1404 RVLocs, *DAG.getContext());
1405 CCInfo.AnalyzeCallResult(Ins, RetCC_X86);
1407 // Copy all of the result registers out of their specified physreg.
1408 for (unsigned i = 0; i != RVLocs.size(); ++i) {
1409 CCValAssign &VA = RVLocs[i];
1410 EVT CopyVT = VA.getValVT();
1412 // If this is x86-64, and we disabled SSE, we can't return FP values
1413 if ((CopyVT == MVT::f32 || CopyVT == MVT::f64) &&
1414 ((Is64Bit || Ins[i].Flags.isInReg()) && !Subtarget->hasSSE1())) {
1415 report_fatal_error("SSE register return with SSE disabled");
1420 // If this is a call to a function that returns an fp value on the floating
1421 // point stack, we must guarantee the the value is popped from the stack, so
1422 // a CopyFromReg is not good enough - the copy instruction may be eliminated
1423 // if the return value is not used. We use the FpGET_ST0 instructions
1425 if (VA.getLocReg() == X86::ST0 || VA.getLocReg() == X86::ST1) {
1426 // If we prefer to use the value in xmm registers, copy it out as f80 and
1427 // use a truncate to move it from fp stack reg to xmm reg.
1428 if (isScalarFPTypeInSSEReg(VA.getValVT())) CopyVT = MVT::f80;
1429 bool isST0 = VA.getLocReg() == X86::ST0;
1431 if (CopyVT == MVT::f32) Opc = isST0 ? X86::FpGET_ST0_32:X86::FpGET_ST1_32;
1432 if (CopyVT == MVT::f64) Opc = isST0 ? X86::FpGET_ST0_64:X86::FpGET_ST1_64;
1433 if (CopyVT == MVT::f80) Opc = isST0 ? X86::FpGET_ST0_80:X86::FpGET_ST1_80;
1434 SDValue Ops[] = { Chain, InFlag };
1435 Chain = SDValue(DAG.getMachineNode(Opc, dl, CopyVT, MVT::Other, MVT::Flag,
1437 Val = Chain.getValue(0);
1439 // Round the f80 to the right size, which also moves it to the appropriate
1441 if (CopyVT != VA.getValVT())
1442 Val = DAG.getNode(ISD::FP_ROUND, dl, VA.getValVT(), Val,
1443 // This truncation won't change the value.
1444 DAG.getIntPtrConstant(1));
1445 } else if (Is64Bit && CopyVT.isVector() && CopyVT.getSizeInBits() == 64) {
1446 // For x86-64, MMX values are returned in XMM0 / XMM1 except for v1i64.
1447 if (VA.getLocReg() == X86::XMM0 || VA.getLocReg() == X86::XMM1) {
1448 Chain = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(),
1449 MVT::v2i64, InFlag).getValue(1);
1450 Val = Chain.getValue(0);
1451 Val = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i64,
1452 Val, DAG.getConstant(0, MVT::i64));
1454 Chain = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(),
1455 MVT::i64, InFlag).getValue(1);
1456 Val = Chain.getValue(0);
1458 Val = DAG.getNode(ISD::BIT_CONVERT, dl, CopyVT, Val);
1460 Chain = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(),
1461 CopyVT, InFlag).getValue(1);
1462 Val = Chain.getValue(0);
1464 InFlag = Chain.getValue(2);
1465 InVals.push_back(Val);
1472 //===----------------------------------------------------------------------===//
1473 // C & StdCall & Fast Calling Convention implementation
1474 //===----------------------------------------------------------------------===//
1475 // StdCall calling convention seems to be standard for many Windows' API
1476 // routines and around. It differs from C calling convention just a little:
1477 // callee should clean up the stack, not caller. Symbols should be also
1478 // decorated in some fancy way :) It doesn't support any vector arguments.
1479 // For info on fast calling convention see Fast Calling Convention (tail call)
1480 // implementation LowerX86_32FastCCCallTo.
1482 /// CallIsStructReturn - Determines whether a call uses struct return
1484 static bool CallIsStructReturn(const SmallVectorImpl<ISD::OutputArg> &Outs) {
1488 return Outs[0].Flags.isSRet();
1491 /// ArgsAreStructReturn - Determines whether a function uses struct
1492 /// return semantics.
1494 ArgsAreStructReturn(const SmallVectorImpl<ISD::InputArg> &Ins) {
1498 return Ins[0].Flags.isSRet();
1501 /// CCAssignFnForNode - Selects the correct CCAssignFn for a the
1502 /// given CallingConvention value.
1503 CCAssignFn *X86TargetLowering::CCAssignFnForNode(CallingConv::ID CC) const {
1504 if (Subtarget->is64Bit()) {
1505 if (CC == CallingConv::GHC)
1506 return CC_X86_64_GHC;
1507 else if (Subtarget->isTargetWin64())
1508 return CC_X86_Win64_C;
1513 if (CC == CallingConv::X86_FastCall)
1514 return CC_X86_32_FastCall;
1515 else if (CC == CallingConv::X86_ThisCall)
1516 return CC_X86_32_ThisCall;
1517 else if (CC == CallingConv::Fast)
1518 return CC_X86_32_FastCC;
1519 else if (CC == CallingConv::GHC)
1520 return CC_X86_32_GHC;
1525 /// CreateCopyOfByValArgument - Make a copy of an aggregate at address specified
1526 /// by "Src" to address "Dst" with size and alignment information specified by
1527 /// the specific parameter attribute. The copy will be passed as a byval
1528 /// function parameter.
1530 CreateCopyOfByValArgument(SDValue Src, SDValue Dst, SDValue Chain,
1531 ISD::ArgFlagsTy Flags, SelectionDAG &DAG,
1533 SDValue SizeNode = DAG.getConstant(Flags.getByValSize(), MVT::i32);
1534 return DAG.getMemcpy(Chain, dl, Dst, Src, SizeNode, Flags.getByValAlign(),
1535 /*isVolatile*/false, /*AlwaysInline=*/true,
1539 /// IsTailCallConvention - Return true if the calling convention is one that
1540 /// supports tail call optimization.
1541 static bool IsTailCallConvention(CallingConv::ID CC) {
1542 return (CC == CallingConv::Fast || CC == CallingConv::GHC);
1545 /// FuncIsMadeTailCallSafe - Return true if the function is being made into
1546 /// a tailcall target by changing its ABI.
1547 static bool FuncIsMadeTailCallSafe(CallingConv::ID CC) {
1548 return GuaranteedTailCallOpt && IsTailCallConvention(CC);
1552 X86TargetLowering::LowerMemArgument(SDValue Chain,
1553 CallingConv::ID CallConv,
1554 const SmallVectorImpl<ISD::InputArg> &Ins,
1555 DebugLoc dl, SelectionDAG &DAG,
1556 const CCValAssign &VA,
1557 MachineFrameInfo *MFI,
1559 // Create the nodes corresponding to a load from this parameter slot.
1560 ISD::ArgFlagsTy Flags = Ins[i].Flags;
1561 bool AlwaysUseMutable = FuncIsMadeTailCallSafe(CallConv);
1562 bool isImmutable = !AlwaysUseMutable && !Flags.isByVal();
1565 // If value is passed by pointer we have address passed instead of the value
1567 if (VA.getLocInfo() == CCValAssign::Indirect)
1568 ValVT = VA.getLocVT();
1570 ValVT = VA.getValVT();
1572 // FIXME: For now, all byval parameter objects are marked mutable. This can be
1573 // changed with more analysis.
1574 // In case of tail call optimization mark all arguments mutable. Since they
1575 // could be overwritten by lowering of arguments in case of a tail call.
1576 if (Flags.isByVal()) {
1577 int FI = MFI->CreateFixedObject(Flags.getByValSize(),
1578 VA.getLocMemOffset(), isImmutable);
1579 return DAG.getFrameIndex(FI, getPointerTy());
1581 int FI = MFI->CreateFixedObject(ValVT.getSizeInBits()/8,
1582 VA.getLocMemOffset(), isImmutable);
1583 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
1584 return DAG.getLoad(ValVT, dl, Chain, FIN,
1585 PseudoSourceValue::getFixedStack(FI), 0,
1591 X86TargetLowering::LowerFormalArguments(SDValue Chain,
1592 CallingConv::ID CallConv,
1594 const SmallVectorImpl<ISD::InputArg> &Ins,
1597 SmallVectorImpl<SDValue> &InVals)
1599 MachineFunction &MF = DAG.getMachineFunction();
1600 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
1602 const Function* Fn = MF.getFunction();
1603 if (Fn->hasExternalLinkage() &&
1604 Subtarget->isTargetCygMing() &&
1605 Fn->getName() == "main")
1606 FuncInfo->setForceFramePointer(true);
1608 MachineFrameInfo *MFI = MF.getFrameInfo();
1609 bool Is64Bit = Subtarget->is64Bit();
1610 bool IsWin64 = Subtarget->isTargetWin64();
1612 assert(!(isVarArg && IsTailCallConvention(CallConv)) &&
1613 "Var args not supported with calling convention fastcc or ghc");
1615 // Assign locations to all of the incoming arguments.
1616 SmallVector<CCValAssign, 16> ArgLocs;
1617 CCState CCInfo(CallConv, isVarArg, getTargetMachine(),
1618 ArgLocs, *DAG.getContext());
1619 CCInfo.AnalyzeFormalArguments(Ins, CCAssignFnForNode(CallConv));
1621 unsigned LastVal = ~0U;
1623 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
1624 CCValAssign &VA = ArgLocs[i];
1625 // TODO: If an arg is passed in two places (e.g. reg and stack), skip later
1627 assert(VA.getValNo() != LastVal &&
1628 "Don't support value assigned to multiple locs yet");
1629 LastVal = VA.getValNo();
1631 if (VA.isRegLoc()) {
1632 EVT RegVT = VA.getLocVT();
1633 TargetRegisterClass *RC = NULL;
1634 if (RegVT == MVT::i32)
1635 RC = X86::GR32RegisterClass;
1636 else if (Is64Bit && RegVT == MVT::i64)
1637 RC = X86::GR64RegisterClass;
1638 else if (RegVT == MVT::f32)
1639 RC = X86::FR32RegisterClass;
1640 else if (RegVT == MVT::f64)
1641 RC = X86::FR64RegisterClass;
1642 else if (RegVT.isVector() && RegVT.getSizeInBits() == 256)
1643 RC = X86::VR256RegisterClass;
1644 else if (RegVT.isVector() && RegVT.getSizeInBits() == 128)
1645 RC = X86::VR128RegisterClass;
1646 else if (RegVT.isVector() && RegVT.getSizeInBits() == 64)
1647 RC = X86::VR64RegisterClass;
1649 llvm_unreachable("Unknown argument type!");
1651 unsigned Reg = MF.addLiveIn(VA.getLocReg(), RC);
1652 ArgValue = DAG.getCopyFromReg(Chain, dl, Reg, RegVT);
1654 // If this is an 8 or 16-bit value, it is really passed promoted to 32
1655 // bits. Insert an assert[sz]ext to capture this, then truncate to the
1657 if (VA.getLocInfo() == CCValAssign::SExt)
1658 ArgValue = DAG.getNode(ISD::AssertSext, dl, RegVT, ArgValue,
1659 DAG.getValueType(VA.getValVT()));
1660 else if (VA.getLocInfo() == CCValAssign::ZExt)
1661 ArgValue = DAG.getNode(ISD::AssertZext, dl, RegVT, ArgValue,
1662 DAG.getValueType(VA.getValVT()));
1663 else if (VA.getLocInfo() == CCValAssign::BCvt)
1664 ArgValue = DAG.getNode(ISD::BIT_CONVERT, dl, VA.getValVT(), ArgValue);
1666 if (VA.isExtInLoc()) {
1667 // Handle MMX values passed in XMM regs.
1668 if (RegVT.isVector()) {
1669 ArgValue = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i64,
1670 ArgValue, DAG.getConstant(0, MVT::i64));
1671 ArgValue = DAG.getNode(ISD::BIT_CONVERT, dl, VA.getValVT(), ArgValue);
1673 ArgValue = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), ArgValue);
1676 assert(VA.isMemLoc());
1677 ArgValue = LowerMemArgument(Chain, CallConv, Ins, dl, DAG, VA, MFI, i);
1680 // If value is passed via pointer - do a load.
1681 if (VA.getLocInfo() == CCValAssign::Indirect)
1682 ArgValue = DAG.getLoad(VA.getValVT(), dl, Chain, ArgValue, NULL, 0,
1685 InVals.push_back(ArgValue);
1688 // The x86-64 ABI for returning structs by value requires that we copy
1689 // the sret argument into %rax for the return. Save the argument into
1690 // a virtual register so that we can access it from the return points.
1691 if (Is64Bit && MF.getFunction()->hasStructRetAttr()) {
1692 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
1693 unsigned Reg = FuncInfo->getSRetReturnReg();
1695 Reg = MF.getRegInfo().createVirtualRegister(getRegClassFor(MVT::i64));
1696 FuncInfo->setSRetReturnReg(Reg);
1698 SDValue Copy = DAG.getCopyToReg(DAG.getEntryNode(), dl, Reg, InVals[0]);
1699 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Copy, Chain);
1702 unsigned StackSize = CCInfo.getNextStackOffset();
1703 // Align stack specially for tail calls.
1704 if (FuncIsMadeTailCallSafe(CallConv))
1705 StackSize = GetAlignedArgumentStackSize(StackSize, DAG);
1707 // If the function takes variable number of arguments, make a frame index for
1708 // the start of the first vararg value... for expansion of llvm.va_start.
1710 if (Is64Bit || (CallConv != CallingConv::X86_FastCall &&
1711 CallConv != CallingConv::X86_ThisCall)) {
1712 FuncInfo->setVarArgsFrameIndex(MFI->CreateFixedObject(1, StackSize,true));
1715 unsigned TotalNumIntRegs = 0, TotalNumXMMRegs = 0;
1717 // FIXME: We should really autogenerate these arrays
1718 static const unsigned GPR64ArgRegsWin64[] = {
1719 X86::RCX, X86::RDX, X86::R8, X86::R9
1721 static const unsigned XMMArgRegsWin64[] = {
1722 X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3
1724 static const unsigned GPR64ArgRegs64Bit[] = {
1725 X86::RDI, X86::RSI, X86::RDX, X86::RCX, X86::R8, X86::R9
1727 static const unsigned XMMArgRegs64Bit[] = {
1728 X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3,
1729 X86::XMM4, X86::XMM5, X86::XMM6, X86::XMM7
1731 const unsigned *GPR64ArgRegs, *XMMArgRegs;
1734 TotalNumIntRegs = 4; TotalNumXMMRegs = 4;
1735 GPR64ArgRegs = GPR64ArgRegsWin64;
1736 XMMArgRegs = XMMArgRegsWin64;
1738 TotalNumIntRegs = 6; TotalNumXMMRegs = 8;
1739 GPR64ArgRegs = GPR64ArgRegs64Bit;
1740 XMMArgRegs = XMMArgRegs64Bit;
1742 unsigned NumIntRegs = CCInfo.getFirstUnallocated(GPR64ArgRegs,
1744 unsigned NumXMMRegs = CCInfo.getFirstUnallocated(XMMArgRegs,
1747 bool NoImplicitFloatOps = Fn->hasFnAttr(Attribute::NoImplicitFloat);
1748 assert(!(NumXMMRegs && !Subtarget->hasSSE1()) &&
1749 "SSE register cannot be used when SSE is disabled!");
1750 assert(!(NumXMMRegs && UseSoftFloat && NoImplicitFloatOps) &&
1751 "SSE register cannot be used when SSE is disabled!");
1752 if (UseSoftFloat || NoImplicitFloatOps || !Subtarget->hasSSE1())
1753 // Kernel mode asks for SSE to be disabled, so don't push them
1755 TotalNumXMMRegs = 0;
1757 // For X86-64, if there are vararg parameters that are passed via
1758 // registers, then we must store them to their spots on the stack so they
1759 // may be loaded by deferencing the result of va_next.
1760 FuncInfo->setVarArgsGPOffset(NumIntRegs * 8);
1761 FuncInfo->setVarArgsFPOffset(TotalNumIntRegs * 8 + NumXMMRegs * 16);
1762 FuncInfo->setRegSaveFrameIndex(
1763 MFI->CreateStackObject(TotalNumIntRegs * 8 + TotalNumXMMRegs * 16, 16,
1766 // Store the integer parameter registers.
1767 SmallVector<SDValue, 8> MemOps;
1768 SDValue RSFIN = DAG.getFrameIndex(FuncInfo->getRegSaveFrameIndex(),
1770 unsigned Offset = FuncInfo->getVarArgsGPOffset();
1771 for (; NumIntRegs != TotalNumIntRegs; ++NumIntRegs) {
1772 SDValue FIN = DAG.getNode(ISD::ADD, dl, getPointerTy(), RSFIN,
1773 DAG.getIntPtrConstant(Offset));
1774 unsigned VReg = MF.addLiveIn(GPR64ArgRegs[NumIntRegs],
1775 X86::GR64RegisterClass);
1776 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i64);
1778 DAG.getStore(Val.getValue(1), dl, Val, FIN,
1779 PseudoSourceValue::getFixedStack(
1780 FuncInfo->getRegSaveFrameIndex()),
1781 Offset, false, false, 0);
1782 MemOps.push_back(Store);
1786 if (TotalNumXMMRegs != 0 && NumXMMRegs != TotalNumXMMRegs) {
1787 // Now store the XMM (fp + vector) parameter registers.
1788 SmallVector<SDValue, 11> SaveXMMOps;
1789 SaveXMMOps.push_back(Chain);
1791 unsigned AL = MF.addLiveIn(X86::AL, X86::GR8RegisterClass);
1792 SDValue ALVal = DAG.getCopyFromReg(DAG.getEntryNode(), dl, AL, MVT::i8);
1793 SaveXMMOps.push_back(ALVal);
1795 SaveXMMOps.push_back(DAG.getIntPtrConstant(
1796 FuncInfo->getRegSaveFrameIndex()));
1797 SaveXMMOps.push_back(DAG.getIntPtrConstant(
1798 FuncInfo->getVarArgsFPOffset()));
1800 for (; NumXMMRegs != TotalNumXMMRegs; ++NumXMMRegs) {
1801 unsigned VReg = MF.addLiveIn(XMMArgRegs[NumXMMRegs],
1802 X86::VR128RegisterClass);
1803 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, MVT::v4f32);
1804 SaveXMMOps.push_back(Val);
1806 MemOps.push_back(DAG.getNode(X86ISD::VASTART_SAVE_XMM_REGS, dl,
1808 &SaveXMMOps[0], SaveXMMOps.size()));
1811 if (!MemOps.empty())
1812 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
1813 &MemOps[0], MemOps.size());
1817 // Some CCs need callee pop.
1818 if (Subtarget->IsCalleePop(isVarArg, CallConv)) {
1819 FuncInfo->setBytesToPopOnReturn(StackSize); // Callee pops everything.
1821 FuncInfo->setBytesToPopOnReturn(0); // Callee pops nothing.
1822 // If this is an sret function, the return should pop the hidden pointer.
1823 if (!Is64Bit && !IsTailCallConvention(CallConv) && ArgsAreStructReturn(Ins))
1824 FuncInfo->setBytesToPopOnReturn(4);
1828 // RegSaveFrameIndex is X86-64 only.
1829 FuncInfo->setRegSaveFrameIndex(0xAAAAAAA);
1830 if (CallConv == CallingConv::X86_FastCall ||
1831 CallConv == CallingConv::X86_ThisCall)
1832 // fastcc functions can't have varargs.
1833 FuncInfo->setVarArgsFrameIndex(0xAAAAAAA);
1840 X86TargetLowering::LowerMemOpCallTo(SDValue Chain,
1841 SDValue StackPtr, SDValue Arg,
1842 DebugLoc dl, SelectionDAG &DAG,
1843 const CCValAssign &VA,
1844 ISD::ArgFlagsTy Flags) const {
1845 const unsigned FirstStackArgOffset = (Subtarget->isTargetWin64() ? 32 : 0);
1846 unsigned LocMemOffset = FirstStackArgOffset + VA.getLocMemOffset();
1847 SDValue PtrOff = DAG.getIntPtrConstant(LocMemOffset);
1848 PtrOff = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr, PtrOff);
1849 if (Flags.isByVal()) {
1850 return CreateCopyOfByValArgument(Arg, PtrOff, Chain, Flags, DAG, dl);
1852 return DAG.getStore(Chain, dl, Arg, PtrOff,
1853 PseudoSourceValue::getStack(), LocMemOffset,
1857 /// EmitTailCallLoadRetAddr - Emit a load of return address if tail call
1858 /// optimization is performed and it is required.
1860 X86TargetLowering::EmitTailCallLoadRetAddr(SelectionDAG &DAG,
1861 SDValue &OutRetAddr, SDValue Chain,
1862 bool IsTailCall, bool Is64Bit,
1863 int FPDiff, DebugLoc dl) const {
1864 // Adjust the Return address stack slot.
1865 EVT VT = getPointerTy();
1866 OutRetAddr = getReturnAddressFrameIndex(DAG);
1868 // Load the "old" Return address.
1869 OutRetAddr = DAG.getLoad(VT, dl, Chain, OutRetAddr, NULL, 0, false, false, 0);
1870 return SDValue(OutRetAddr.getNode(), 1);
1873 /// EmitTailCallStoreRetAddr - Emit a store of the return adress if tail call
1874 /// optimization is performed and it is required (FPDiff!=0).
1876 EmitTailCallStoreRetAddr(SelectionDAG & DAG, MachineFunction &MF,
1877 SDValue Chain, SDValue RetAddrFrIdx,
1878 bool Is64Bit, int FPDiff, DebugLoc dl) {
1879 // Store the return address to the appropriate stack slot.
1880 if (!FPDiff) return Chain;
1881 // Calculate the new stack slot for the return address.
1882 int SlotSize = Is64Bit ? 8 : 4;
1883 int NewReturnAddrFI =
1884 MF.getFrameInfo()->CreateFixedObject(SlotSize, FPDiff-SlotSize, false);
1885 EVT VT = Is64Bit ? MVT::i64 : MVT::i32;
1886 SDValue NewRetAddrFrIdx = DAG.getFrameIndex(NewReturnAddrFI, VT);
1887 Chain = DAG.getStore(Chain, dl, RetAddrFrIdx, NewRetAddrFrIdx,
1888 PseudoSourceValue::getFixedStack(NewReturnAddrFI), 0,
1894 X86TargetLowering::LowerCall(SDValue Chain, SDValue Callee,
1895 CallingConv::ID CallConv, bool isVarArg,
1897 const SmallVectorImpl<ISD::OutputArg> &Outs,
1898 const SmallVectorImpl<SDValue> &OutVals,
1899 const SmallVectorImpl<ISD::InputArg> &Ins,
1900 DebugLoc dl, SelectionDAG &DAG,
1901 SmallVectorImpl<SDValue> &InVals) const {
1902 MachineFunction &MF = DAG.getMachineFunction();
1903 bool Is64Bit = Subtarget->is64Bit();
1904 bool IsStructRet = CallIsStructReturn(Outs);
1905 bool IsSibcall = false;
1908 // Check if it's really possible to do a tail call.
1909 isTailCall = IsEligibleForTailCallOptimization(Callee, CallConv,
1910 isVarArg, IsStructRet, MF.getFunction()->hasStructRetAttr(),
1911 Outs, OutVals, Ins, DAG);
1913 // Sibcalls are automatically detected tailcalls which do not require
1915 if (!GuaranteedTailCallOpt && isTailCall)
1922 assert(!(isVarArg && IsTailCallConvention(CallConv)) &&
1923 "Var args not supported with calling convention fastcc or ghc");
1925 // Analyze operands of the call, assigning locations to each operand.
1926 SmallVector<CCValAssign, 16> ArgLocs;
1927 CCState CCInfo(CallConv, isVarArg, getTargetMachine(),
1928 ArgLocs, *DAG.getContext());
1929 CCInfo.AnalyzeCallOperands(Outs, CCAssignFnForNode(CallConv));
1931 // Get a count of how many bytes are to be pushed on the stack.
1932 unsigned NumBytes = CCInfo.getNextStackOffset();
1934 // This is a sibcall. The memory operands are available in caller's
1935 // own caller's stack.
1937 else if (GuaranteedTailCallOpt && IsTailCallConvention(CallConv))
1938 NumBytes = GetAlignedArgumentStackSize(NumBytes, DAG);
1941 if (isTailCall && !IsSibcall) {
1942 // Lower arguments at fp - stackoffset + fpdiff.
1943 unsigned NumBytesCallerPushed =
1944 MF.getInfo<X86MachineFunctionInfo>()->getBytesToPopOnReturn();
1945 FPDiff = NumBytesCallerPushed - NumBytes;
1947 // Set the delta of movement of the returnaddr stackslot.
1948 // But only set if delta is greater than previous delta.
1949 if (FPDiff < (MF.getInfo<X86MachineFunctionInfo>()->getTCReturnAddrDelta()))
1950 MF.getInfo<X86MachineFunctionInfo>()->setTCReturnAddrDelta(FPDiff);
1954 Chain = DAG.getCALLSEQ_START(Chain, DAG.getIntPtrConstant(NumBytes, true));
1956 SDValue RetAddrFrIdx;
1957 // Load return adress for tail calls.
1958 if (isTailCall && FPDiff)
1959 Chain = EmitTailCallLoadRetAddr(DAG, RetAddrFrIdx, Chain, isTailCall,
1960 Is64Bit, FPDiff, dl);
1962 SmallVector<std::pair<unsigned, SDValue>, 8> RegsToPass;
1963 SmallVector<SDValue, 8> MemOpChains;
1966 // Walk the register/memloc assignments, inserting copies/loads. In the case
1967 // of tail call optimization arguments are handle later.
1968 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
1969 CCValAssign &VA = ArgLocs[i];
1970 EVT RegVT = VA.getLocVT();
1971 SDValue Arg = OutVals[i];
1972 ISD::ArgFlagsTy Flags = Outs[i].Flags;
1973 bool isByVal = Flags.isByVal();
1975 // Promote the value if needed.
1976 switch (VA.getLocInfo()) {
1977 default: llvm_unreachable("Unknown loc info!");
1978 case CCValAssign::Full: break;
1979 case CCValAssign::SExt:
1980 Arg = DAG.getNode(ISD::SIGN_EXTEND, dl, RegVT, Arg);
1982 case CCValAssign::ZExt:
1983 Arg = DAG.getNode(ISD::ZERO_EXTEND, dl, RegVT, Arg);
1985 case CCValAssign::AExt:
1986 if (RegVT.isVector() && RegVT.getSizeInBits() == 128) {
1987 // Special case: passing MMX values in XMM registers.
1988 Arg = DAG.getNode(ISD::BIT_CONVERT, dl, MVT::i64, Arg);
1989 Arg = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2i64, Arg);
1990 Arg = getMOVL(DAG, dl, MVT::v2i64, DAG.getUNDEF(MVT::v2i64), Arg);
1992 Arg = DAG.getNode(ISD::ANY_EXTEND, dl, RegVT, Arg);
1994 case CCValAssign::BCvt:
1995 Arg = DAG.getNode(ISD::BIT_CONVERT, dl, RegVT, Arg);
1997 case CCValAssign::Indirect: {
1998 // Store the argument.
1999 SDValue SpillSlot = DAG.CreateStackTemporary(VA.getValVT());
2000 int FI = cast<FrameIndexSDNode>(SpillSlot)->getIndex();
2001 Chain = DAG.getStore(Chain, dl, Arg, SpillSlot,
2002 PseudoSourceValue::getFixedStack(FI), 0,
2009 if (VA.isRegLoc()) {
2010 RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
2011 if (isVarArg && Subtarget->isTargetWin64()) {
2012 // Win64 ABI requires argument XMM reg to be copied to the corresponding
2013 // shadow reg if callee is a varargs function.
2014 unsigned ShadowReg = 0;
2015 switch (VA.getLocReg()) {
2016 case X86::XMM0: ShadowReg = X86::RCX; break;
2017 case X86::XMM1: ShadowReg = X86::RDX; break;
2018 case X86::XMM2: ShadowReg = X86::R8; break;
2019 case X86::XMM3: ShadowReg = X86::R9; break;
2022 RegsToPass.push_back(std::make_pair(ShadowReg, Arg));
2024 } else if (!IsSibcall && (!isTailCall || isByVal)) {
2025 assert(VA.isMemLoc());
2026 if (StackPtr.getNode() == 0)
2027 StackPtr = DAG.getCopyFromReg(Chain, dl, X86StackPtr, getPointerTy());
2028 MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, Arg,
2029 dl, DAG, VA, Flags));
2033 if (!MemOpChains.empty())
2034 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
2035 &MemOpChains[0], MemOpChains.size());
2037 // Build a sequence of copy-to-reg nodes chained together with token chain
2038 // and flag operands which copy the outgoing args into registers.
2040 // Tail call byval lowering might overwrite argument registers so in case of
2041 // tail call optimization the copies to registers are lowered later.
2043 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
2044 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
2045 RegsToPass[i].second, InFlag);
2046 InFlag = Chain.getValue(1);
2049 if (Subtarget->isPICStyleGOT()) {
2050 // ELF / PIC requires GOT in the EBX register before function calls via PLT
2053 Chain = DAG.getCopyToReg(Chain, dl, X86::EBX,
2054 DAG.getNode(X86ISD::GlobalBaseReg,
2055 DebugLoc(), getPointerTy()),
2057 InFlag = Chain.getValue(1);
2059 // If we are tail calling and generating PIC/GOT style code load the
2060 // address of the callee into ECX. The value in ecx is used as target of
2061 // the tail jump. This is done to circumvent the ebx/callee-saved problem
2062 // for tail calls on PIC/GOT architectures. Normally we would just put the
2063 // address of GOT into ebx and then call target@PLT. But for tail calls
2064 // ebx would be restored (since ebx is callee saved) before jumping to the
2067 // Note: The actual moving to ECX is done further down.
2068 GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee);
2069 if (G && !G->getGlobal()->hasHiddenVisibility() &&
2070 !G->getGlobal()->hasProtectedVisibility())
2071 Callee = LowerGlobalAddress(Callee, DAG);
2072 else if (isa<ExternalSymbolSDNode>(Callee))
2073 Callee = LowerExternalSymbol(Callee, DAG);
2077 if (Is64Bit && isVarArg && !Subtarget->isTargetWin64()) {
2078 // From AMD64 ABI document:
2079 // For calls that may call functions that use varargs or stdargs
2080 // (prototype-less calls or calls to functions containing ellipsis (...) in
2081 // the declaration) %al is used as hidden argument to specify the number
2082 // of SSE registers used. The contents of %al do not need to match exactly
2083 // the number of registers, but must be an ubound on the number of SSE
2084 // registers used and is in the range 0 - 8 inclusive.
2086 // Count the number of XMM registers allocated.
2087 static const unsigned XMMArgRegs[] = {
2088 X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3,
2089 X86::XMM4, X86::XMM5, X86::XMM6, X86::XMM7
2091 unsigned NumXMMRegs = CCInfo.getFirstUnallocated(XMMArgRegs, 8);
2092 assert((Subtarget->hasSSE1() || !NumXMMRegs)
2093 && "SSE registers cannot be used when SSE is disabled");
2095 Chain = DAG.getCopyToReg(Chain, dl, X86::AL,
2096 DAG.getConstant(NumXMMRegs, MVT::i8), InFlag);
2097 InFlag = Chain.getValue(1);
2101 // For tail calls lower the arguments to the 'real' stack slot.
2103 // Force all the incoming stack arguments to be loaded from the stack
2104 // before any new outgoing arguments are stored to the stack, because the
2105 // outgoing stack slots may alias the incoming argument stack slots, and
2106 // the alias isn't otherwise explicit. This is slightly more conservative
2107 // than necessary, because it means that each store effectively depends
2108 // on every argument instead of just those arguments it would clobber.
2109 SDValue ArgChain = DAG.getStackArgumentTokenFactor(Chain);
2111 SmallVector<SDValue, 8> MemOpChains2;
2114 // Do not flag preceeding copytoreg stuff together with the following stuff.
2116 if (GuaranteedTailCallOpt) {
2117 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2118 CCValAssign &VA = ArgLocs[i];
2121 assert(VA.isMemLoc());
2122 SDValue Arg = OutVals[i];
2123 ISD::ArgFlagsTy Flags = Outs[i].Flags;
2124 // Create frame index.
2125 int32_t Offset = VA.getLocMemOffset()+FPDiff;
2126 uint32_t OpSize = (VA.getLocVT().getSizeInBits()+7)/8;
2127 FI = MF.getFrameInfo()->CreateFixedObject(OpSize, Offset, true);
2128 FIN = DAG.getFrameIndex(FI, getPointerTy());
2130 if (Flags.isByVal()) {
2131 // Copy relative to framepointer.
2132 SDValue Source = DAG.getIntPtrConstant(VA.getLocMemOffset());
2133 if (StackPtr.getNode() == 0)
2134 StackPtr = DAG.getCopyFromReg(Chain, dl, X86StackPtr,
2136 Source = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr, Source);
2138 MemOpChains2.push_back(CreateCopyOfByValArgument(Source, FIN,
2142 // Store relative to framepointer.
2143 MemOpChains2.push_back(
2144 DAG.getStore(ArgChain, dl, Arg, FIN,
2145 PseudoSourceValue::getFixedStack(FI), 0,
2151 if (!MemOpChains2.empty())
2152 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
2153 &MemOpChains2[0], MemOpChains2.size());
2155 // Copy arguments to their registers.
2156 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
2157 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
2158 RegsToPass[i].second, InFlag);
2159 InFlag = Chain.getValue(1);
2163 // Store the return address to the appropriate stack slot.
2164 Chain = EmitTailCallStoreRetAddr(DAG, MF, Chain, RetAddrFrIdx, Is64Bit,
2168 if (getTargetMachine().getCodeModel() == CodeModel::Large) {
2169 assert(Is64Bit && "Large code model is only legal in 64-bit mode.");
2170 // In the 64-bit large code model, we have to make all calls
2171 // through a register, since the call instruction's 32-bit
2172 // pc-relative offset may not be large enough to hold the whole
2174 } else if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
2175 // If the callee is a GlobalAddress node (quite common, every direct call
2176 // is) turn it into a TargetGlobalAddress node so that legalize doesn't hack
2179 // We should use extra load for direct calls to dllimported functions in
2181 const GlobalValue *GV = G->getGlobal();
2182 if (!GV->hasDLLImportLinkage()) {
2183 unsigned char OpFlags = 0;
2185 // On ELF targets, in both X86-64 and X86-32 mode, direct calls to
2186 // external symbols most go through the PLT in PIC mode. If the symbol
2187 // has hidden or protected visibility, or if it is static or local, then
2188 // we don't need to use the PLT - we can directly call it.
2189 if (Subtarget->isTargetELF() &&
2190 getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
2191 GV->hasDefaultVisibility() && !GV->hasLocalLinkage()) {
2192 OpFlags = X86II::MO_PLT;
2193 } else if (Subtarget->isPICStyleStubAny() &&
2194 (GV->isDeclaration() || GV->isWeakForLinker()) &&
2195 Subtarget->getDarwinVers() < 9) {
2196 // PC-relative references to external symbols should go through $stub,
2197 // unless we're building with the leopard linker or later, which
2198 // automatically synthesizes these stubs.
2199 OpFlags = X86II::MO_DARWIN_STUB;
2202 Callee = DAG.getTargetGlobalAddress(GV, dl, getPointerTy(),
2203 G->getOffset(), OpFlags);
2205 } else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) {
2206 unsigned char OpFlags = 0;
2208 // On ELF targets, in either X86-64 or X86-32 mode, direct calls to external
2209 // symbols should go through the PLT.
2210 if (Subtarget->isTargetELF() &&
2211 getTargetMachine().getRelocationModel() == Reloc::PIC_) {
2212 OpFlags = X86II::MO_PLT;
2213 } else if (Subtarget->isPICStyleStubAny() &&
2214 Subtarget->getDarwinVers() < 9) {
2215 // PC-relative references to external symbols should go through $stub,
2216 // unless we're building with the leopard linker or later, which
2217 // automatically synthesizes these stubs.
2218 OpFlags = X86II::MO_DARWIN_STUB;
2221 Callee = DAG.getTargetExternalSymbol(S->getSymbol(), getPointerTy(),
2225 // Returns a chain & a flag for retval copy to use.
2226 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Flag);
2227 SmallVector<SDValue, 8> Ops;
2229 if (!IsSibcall && isTailCall) {
2230 Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(NumBytes, true),
2231 DAG.getIntPtrConstant(0, true), InFlag);
2232 InFlag = Chain.getValue(1);
2235 Ops.push_back(Chain);
2236 Ops.push_back(Callee);
2239 Ops.push_back(DAG.getConstant(FPDiff, MVT::i32));
2241 // Add argument registers to the end of the list so that they are known live
2243 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
2244 Ops.push_back(DAG.getRegister(RegsToPass[i].first,
2245 RegsToPass[i].second.getValueType()));
2247 // Add an implicit use GOT pointer in EBX.
2248 if (!isTailCall && Subtarget->isPICStyleGOT())
2249 Ops.push_back(DAG.getRegister(X86::EBX, getPointerTy()));
2251 // Add an implicit use of AL for non-Windows x86 64-bit vararg functions.
2252 if (Is64Bit && isVarArg && !Subtarget->isTargetWin64())
2253 Ops.push_back(DAG.getRegister(X86::AL, MVT::i8));
2255 if (InFlag.getNode())
2256 Ops.push_back(InFlag);
2260 //// If this is the first return lowered for this function, add the regs
2261 //// to the liveout set for the function.
2262 // This isn't right, although it's probably harmless on x86; liveouts
2263 // should be computed from returns not tail calls. Consider a void
2264 // function making a tail call to a function returning int.
2265 return DAG.getNode(X86ISD::TC_RETURN, dl,
2266 NodeTys, &Ops[0], Ops.size());
2269 Chain = DAG.getNode(X86ISD::CALL, dl, NodeTys, &Ops[0], Ops.size());
2270 InFlag = Chain.getValue(1);
2272 // Create the CALLSEQ_END node.
2273 unsigned NumBytesForCalleeToPush;
2274 if (Subtarget->IsCalleePop(isVarArg, CallConv))
2275 NumBytesForCalleeToPush = NumBytes; // Callee pops everything
2276 else if (!Is64Bit && !IsTailCallConvention(CallConv) && IsStructRet)
2277 // If this is a call to a struct-return function, the callee
2278 // pops the hidden struct pointer, so we have to push it back.
2279 // This is common for Darwin/X86, Linux & Mingw32 targets.
2280 NumBytesForCalleeToPush = 4;
2282 NumBytesForCalleeToPush = 0; // Callee pops nothing.
2284 // Returns a flag for retval copy to use.
2286 Chain = DAG.getCALLSEQ_END(Chain,
2287 DAG.getIntPtrConstant(NumBytes, true),
2288 DAG.getIntPtrConstant(NumBytesForCalleeToPush,
2291 InFlag = Chain.getValue(1);
2294 // Handle result values, copying them out of physregs into vregs that we
2296 return LowerCallResult(Chain, InFlag, CallConv, isVarArg,
2297 Ins, dl, DAG, InVals);
2301 //===----------------------------------------------------------------------===//
2302 // Fast Calling Convention (tail call) implementation
2303 //===----------------------------------------------------------------------===//
2305 // Like std call, callee cleans arguments, convention except that ECX is
2306 // reserved for storing the tail called function address. Only 2 registers are
2307 // free for argument passing (inreg). Tail call optimization is performed
2309 // * tailcallopt is enabled
2310 // * caller/callee are fastcc
2311 // On X86_64 architecture with GOT-style position independent code only local
2312 // (within module) calls are supported at the moment.
2313 // To keep the stack aligned according to platform abi the function
2314 // GetAlignedArgumentStackSize ensures that argument delta is always multiples
2315 // of stack alignment. (Dynamic linkers need this - darwin's dyld for example)
2316 // If a tail called function callee has more arguments than the caller the
2317 // caller needs to make sure that there is room to move the RETADDR to. This is
2318 // achieved by reserving an area the size of the argument delta right after the
2319 // original REtADDR, but before the saved framepointer or the spilled registers
2320 // e.g. caller(arg1, arg2) calls callee(arg1, arg2,arg3,arg4)
2332 /// GetAlignedArgumentStackSize - Make the stack size align e.g 16n + 12 aligned
2333 /// for a 16 byte align requirement.
2335 X86TargetLowering::GetAlignedArgumentStackSize(unsigned StackSize,
2336 SelectionDAG& DAG) const {
2337 MachineFunction &MF = DAG.getMachineFunction();
2338 const TargetMachine &TM = MF.getTarget();
2339 const TargetFrameInfo &TFI = *TM.getFrameInfo();
2340 unsigned StackAlignment = TFI.getStackAlignment();
2341 uint64_t AlignMask = StackAlignment - 1;
2342 int64_t Offset = StackSize;
2343 uint64_t SlotSize = TD->getPointerSize();
2344 if ( (Offset & AlignMask) <= (StackAlignment - SlotSize) ) {
2345 // Number smaller than 12 so just add the difference.
2346 Offset += ((StackAlignment - SlotSize) - (Offset & AlignMask));
2348 // Mask out lower bits, add stackalignment once plus the 12 bytes.
2349 Offset = ((~AlignMask) & Offset) + StackAlignment +
2350 (StackAlignment-SlotSize);
2355 /// MatchingStackOffset - Return true if the given stack call argument is
2356 /// already available in the same position (relatively) of the caller's
2357 /// incoming argument stack.
2359 bool MatchingStackOffset(SDValue Arg, unsigned Offset, ISD::ArgFlagsTy Flags,
2360 MachineFrameInfo *MFI, const MachineRegisterInfo *MRI,
2361 const X86InstrInfo *TII) {
2362 unsigned Bytes = Arg.getValueType().getSizeInBits() / 8;
2364 if (Arg.getOpcode() == ISD::CopyFromReg) {
2365 unsigned VR = cast<RegisterSDNode>(Arg.getOperand(1))->getReg();
2366 if (!VR || TargetRegisterInfo::isPhysicalRegister(VR))
2368 MachineInstr *Def = MRI->getVRegDef(VR);
2371 if (!Flags.isByVal()) {
2372 if (!TII->isLoadFromStackSlot(Def, FI))
2375 unsigned Opcode = Def->getOpcode();
2376 if ((Opcode == X86::LEA32r || Opcode == X86::LEA64r) &&
2377 Def->getOperand(1).isFI()) {
2378 FI = Def->getOperand(1).getIndex();
2379 Bytes = Flags.getByValSize();
2383 } else if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Arg)) {
2384 if (Flags.isByVal())
2385 // ByVal argument is passed in as a pointer but it's now being
2386 // dereferenced. e.g.
2387 // define @foo(%struct.X* %A) {
2388 // tail call @bar(%struct.X* byval %A)
2391 SDValue Ptr = Ld->getBasePtr();
2392 FrameIndexSDNode *FINode = dyn_cast<FrameIndexSDNode>(Ptr);
2395 FI = FINode->getIndex();
2399 assert(FI != INT_MAX);
2400 if (!MFI->isFixedObjectIndex(FI))
2402 return Offset == MFI->getObjectOffset(FI) && Bytes == MFI->getObjectSize(FI);
2405 /// IsEligibleForTailCallOptimization - Check whether the call is eligible
2406 /// for tail call optimization. Targets which want to do tail call
2407 /// optimization should implement this function.
2409 X86TargetLowering::IsEligibleForTailCallOptimization(SDValue Callee,
2410 CallingConv::ID CalleeCC,
2412 bool isCalleeStructRet,
2413 bool isCallerStructRet,
2414 const SmallVectorImpl<ISD::OutputArg> &Outs,
2415 const SmallVectorImpl<SDValue> &OutVals,
2416 const SmallVectorImpl<ISD::InputArg> &Ins,
2417 SelectionDAG& DAG) const {
2418 if (!IsTailCallConvention(CalleeCC) &&
2419 CalleeCC != CallingConv::C)
2422 // If -tailcallopt is specified, make fastcc functions tail-callable.
2423 const MachineFunction &MF = DAG.getMachineFunction();
2424 const Function *CallerF = DAG.getMachineFunction().getFunction();
2425 CallingConv::ID CallerCC = CallerF->getCallingConv();
2426 bool CCMatch = CallerCC == CalleeCC;
2428 if (GuaranteedTailCallOpt) {
2429 if (IsTailCallConvention(CalleeCC) && CCMatch)
2434 // Look for obvious safe cases to perform tail call optimization that do not
2435 // require ABI changes. This is what gcc calls sibcall.
2437 // Can't do sibcall if stack needs to be dynamically re-aligned. PEI needs to
2438 // emit a special epilogue.
2439 if (RegInfo->needsStackRealignment(MF))
2442 // Do not sibcall optimize vararg calls unless the call site is not passing
2444 if (isVarArg && !Outs.empty())
2447 // Also avoid sibcall optimization if either caller or callee uses struct
2448 // return semantics.
2449 if (isCalleeStructRet || isCallerStructRet)
2452 // If the call result is in ST0 / ST1, it needs to be popped off the x87 stack.
2453 // Therefore if it's not used by the call it is not safe to optimize this into
2455 bool Unused = false;
2456 for (unsigned i = 0, e = Ins.size(); i != e; ++i) {
2463 SmallVector<CCValAssign, 16> RVLocs;
2464 CCState CCInfo(CalleeCC, false, getTargetMachine(),
2465 RVLocs, *DAG.getContext());
2466 CCInfo.AnalyzeCallResult(Ins, RetCC_X86);
2467 for (unsigned i = 0, e = RVLocs.size(); i != e; ++i) {
2468 CCValAssign &VA = RVLocs[i];
2469 if (VA.getLocReg() == X86::ST0 || VA.getLocReg() == X86::ST1)
2474 // If the calling conventions do not match, then we'd better make sure the
2475 // results are returned in the same way as what the caller expects.
2477 SmallVector<CCValAssign, 16> RVLocs1;
2478 CCState CCInfo1(CalleeCC, false, getTargetMachine(),
2479 RVLocs1, *DAG.getContext());
2480 CCInfo1.AnalyzeCallResult(Ins, RetCC_X86);
2482 SmallVector<CCValAssign, 16> RVLocs2;
2483 CCState CCInfo2(CallerCC, false, getTargetMachine(),
2484 RVLocs2, *DAG.getContext());
2485 CCInfo2.AnalyzeCallResult(Ins, RetCC_X86);
2487 if (RVLocs1.size() != RVLocs2.size())
2489 for (unsigned i = 0, e = RVLocs1.size(); i != e; ++i) {
2490 if (RVLocs1[i].isRegLoc() != RVLocs2[i].isRegLoc())
2492 if (RVLocs1[i].getLocInfo() != RVLocs2[i].getLocInfo())
2494 if (RVLocs1[i].isRegLoc()) {
2495 if (RVLocs1[i].getLocReg() != RVLocs2[i].getLocReg())
2498 if (RVLocs1[i].getLocMemOffset() != RVLocs2[i].getLocMemOffset())
2504 // If the callee takes no arguments then go on to check the results of the
2506 if (!Outs.empty()) {
2507 // Check if stack adjustment is needed. For now, do not do this if any
2508 // argument is passed on the stack.
2509 SmallVector<CCValAssign, 16> ArgLocs;
2510 CCState CCInfo(CalleeCC, isVarArg, getTargetMachine(),
2511 ArgLocs, *DAG.getContext());
2512 CCInfo.AnalyzeCallOperands(Outs, CCAssignFnForNode(CalleeCC));
2513 if (CCInfo.getNextStackOffset()) {
2514 MachineFunction &MF = DAG.getMachineFunction();
2515 if (MF.getInfo<X86MachineFunctionInfo>()->getBytesToPopOnReturn())
2517 if (Subtarget->isTargetWin64())
2518 // Win64 ABI has additional complications.
2521 // Check if the arguments are already laid out in the right way as
2522 // the caller's fixed stack objects.
2523 MachineFrameInfo *MFI = MF.getFrameInfo();
2524 const MachineRegisterInfo *MRI = &MF.getRegInfo();
2525 const X86InstrInfo *TII =
2526 ((X86TargetMachine&)getTargetMachine()).getInstrInfo();
2527 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2528 CCValAssign &VA = ArgLocs[i];
2529 SDValue Arg = OutVals[i];
2530 ISD::ArgFlagsTy Flags = Outs[i].Flags;
2531 if (VA.getLocInfo() == CCValAssign::Indirect)
2533 if (!VA.isRegLoc()) {
2534 if (!MatchingStackOffset(Arg, VA.getLocMemOffset(), Flags,
2541 // If the tailcall address may be in a register, then make sure it's
2542 // possible to register allocate for it. In 32-bit, the call address can
2543 // only target EAX, EDX, or ECX since the tail call must be scheduled after
2544 // callee-saved registers are restored. These happen to be the same
2545 // registers used to pass 'inreg' arguments so watch out for those.
2546 if (!Subtarget->is64Bit() &&
2547 !isa<GlobalAddressSDNode>(Callee) &&
2548 !isa<ExternalSymbolSDNode>(Callee)) {
2549 unsigned NumInRegs = 0;
2550 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2551 CCValAssign &VA = ArgLocs[i];
2554 unsigned Reg = VA.getLocReg();
2557 case X86::EAX: case X86::EDX: case X86::ECX:
2558 if (++NumInRegs == 3)
2570 X86TargetLowering::createFastISel(FunctionLoweringInfo &funcInfo) const {
2571 return X86::createFastISel(funcInfo);
2575 //===----------------------------------------------------------------------===//
2576 // Other Lowering Hooks
2577 //===----------------------------------------------------------------------===//
2579 static bool isTargetShuffle(unsigned Opcode) {
2581 default: return false;
2582 case X86ISD::PSHUFD:
2583 case X86ISD::PSHUFHW:
2584 case X86ISD::PSHUFLW:
2585 case X86ISD::SHUFPD:
2586 case X86ISD::SHUFPS:
2587 case X86ISD::MOVLHPS:
2590 case X86ISD::PUNPCKLDQ:
2596 static SDValue getTargetShuffleNode(unsigned Opc, DebugLoc dl, EVT VT,
2597 SDValue V1, unsigned TargetMask, SelectionDAG &DAG) {
2599 default: llvm_unreachable("Unknown x86 shuffle node");
2600 case X86ISD::PSHUFD:
2601 case X86ISD::PSHUFHW:
2602 case X86ISD::PSHUFLW:
2603 return DAG.getNode(Opc, dl, VT, V1, DAG.getConstant(TargetMask, MVT::i8));
2609 static SDValue getTargetShuffleNode(unsigned Opc, DebugLoc dl, EVT VT,
2610 SDValue V1, SDValue V2, unsigned TargetMask, SelectionDAG &DAG) {
2612 default: llvm_unreachable("Unknown x86 shuffle node");
2613 case X86ISD::SHUFPD:
2614 case X86ISD::SHUFPS:
2615 return DAG.getNode(Opc, dl, VT, V1, V2,
2616 DAG.getConstant(TargetMask, MVT::i8));
2621 static SDValue getTargetShuffleNode(unsigned Opc, DebugLoc dl, EVT VT,
2622 SDValue V1, SDValue V2, SelectionDAG &DAG) {
2624 default: llvm_unreachable("Unknown x86 shuffle node");
2625 case X86ISD::MOVLHPS:
2628 case X86ISD::PUNPCKLDQ:
2629 return DAG.getNode(Opc, dl, VT, V1, V2);
2634 SDValue X86TargetLowering::getReturnAddressFrameIndex(SelectionDAG &DAG) const {
2635 MachineFunction &MF = DAG.getMachineFunction();
2636 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
2637 int ReturnAddrIndex = FuncInfo->getRAIndex();
2639 if (ReturnAddrIndex == 0) {
2640 // Set up a frame object for the return address.
2641 uint64_t SlotSize = TD->getPointerSize();
2642 ReturnAddrIndex = MF.getFrameInfo()->CreateFixedObject(SlotSize, -SlotSize,
2644 FuncInfo->setRAIndex(ReturnAddrIndex);
2647 return DAG.getFrameIndex(ReturnAddrIndex, getPointerTy());
2651 bool X86::isOffsetSuitableForCodeModel(int64_t Offset, CodeModel::Model M,
2652 bool hasSymbolicDisplacement) {
2653 // Offset should fit into 32 bit immediate field.
2654 if (!isInt<32>(Offset))
2657 // If we don't have a symbolic displacement - we don't have any extra
2659 if (!hasSymbolicDisplacement)
2662 // FIXME: Some tweaks might be needed for medium code model.
2663 if (M != CodeModel::Small && M != CodeModel::Kernel)
2666 // For small code model we assume that latest object is 16MB before end of 31
2667 // bits boundary. We may also accept pretty large negative constants knowing
2668 // that all objects are in the positive half of address space.
2669 if (M == CodeModel::Small && Offset < 16*1024*1024)
2672 // For kernel code model we know that all object resist in the negative half
2673 // of 32bits address space. We may not accept negative offsets, since they may
2674 // be just off and we may accept pretty large positive ones.
2675 if (M == CodeModel::Kernel && Offset > 0)
2681 /// TranslateX86CC - do a one to one translation of a ISD::CondCode to the X86
2682 /// specific condition code, returning the condition code and the LHS/RHS of the
2683 /// comparison to make.
2684 static unsigned TranslateX86CC(ISD::CondCode SetCCOpcode, bool isFP,
2685 SDValue &LHS, SDValue &RHS, SelectionDAG &DAG) {
2687 if (ConstantSDNode *RHSC = dyn_cast<ConstantSDNode>(RHS)) {
2688 if (SetCCOpcode == ISD::SETGT && RHSC->isAllOnesValue()) {
2689 // X > -1 -> X == 0, jump !sign.
2690 RHS = DAG.getConstant(0, RHS.getValueType());
2691 return X86::COND_NS;
2692 } else if (SetCCOpcode == ISD::SETLT && RHSC->isNullValue()) {
2693 // X < 0 -> X == 0, jump on sign.
2695 } else if (SetCCOpcode == ISD::SETLT && RHSC->getZExtValue() == 1) {
2697 RHS = DAG.getConstant(0, RHS.getValueType());
2698 return X86::COND_LE;
2702 switch (SetCCOpcode) {
2703 default: llvm_unreachable("Invalid integer condition!");
2704 case ISD::SETEQ: return X86::COND_E;
2705 case ISD::SETGT: return X86::COND_G;
2706 case ISD::SETGE: return X86::COND_GE;
2707 case ISD::SETLT: return X86::COND_L;
2708 case ISD::SETLE: return X86::COND_LE;
2709 case ISD::SETNE: return X86::COND_NE;
2710 case ISD::SETULT: return X86::COND_B;
2711 case ISD::SETUGT: return X86::COND_A;
2712 case ISD::SETULE: return X86::COND_BE;
2713 case ISD::SETUGE: return X86::COND_AE;
2717 // First determine if it is required or is profitable to flip the operands.
2719 // If LHS is a foldable load, but RHS is not, flip the condition.
2720 if ((ISD::isNON_EXTLoad(LHS.getNode()) && LHS.hasOneUse()) &&
2721 !(ISD::isNON_EXTLoad(RHS.getNode()) && RHS.hasOneUse())) {
2722 SetCCOpcode = getSetCCSwappedOperands(SetCCOpcode);
2723 std::swap(LHS, RHS);
2726 switch (SetCCOpcode) {
2732 std::swap(LHS, RHS);
2736 // On a floating point condition, the flags are set as follows:
2738 // 0 | 0 | 0 | X > Y
2739 // 0 | 0 | 1 | X < Y
2740 // 1 | 0 | 0 | X == Y
2741 // 1 | 1 | 1 | unordered
2742 switch (SetCCOpcode) {
2743 default: llvm_unreachable("Condcode should be pre-legalized away");
2745 case ISD::SETEQ: return X86::COND_E;
2746 case ISD::SETOLT: // flipped
2748 case ISD::SETGT: return X86::COND_A;
2749 case ISD::SETOLE: // flipped
2751 case ISD::SETGE: return X86::COND_AE;
2752 case ISD::SETUGT: // flipped
2754 case ISD::SETLT: return X86::COND_B;
2755 case ISD::SETUGE: // flipped
2757 case ISD::SETLE: return X86::COND_BE;
2759 case ISD::SETNE: return X86::COND_NE;
2760 case ISD::SETUO: return X86::COND_P;
2761 case ISD::SETO: return X86::COND_NP;
2763 case ISD::SETUNE: return X86::COND_INVALID;
2767 /// hasFPCMov - is there a floating point cmov for the specific X86 condition
2768 /// code. Current x86 isa includes the following FP cmov instructions:
2769 /// fcmovb, fcomvbe, fcomve, fcmovu, fcmovae, fcmova, fcmovne, fcmovnu.
2770 static bool hasFPCMov(unsigned X86CC) {
2786 /// isFPImmLegal - Returns true if the target can instruction select the
2787 /// specified FP immediate natively. If false, the legalizer will
2788 /// materialize the FP immediate as a load from a constant pool.
2789 bool X86TargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT) const {
2790 for (unsigned i = 0, e = LegalFPImmediates.size(); i != e; ++i) {
2791 if (Imm.bitwiseIsEqual(LegalFPImmediates[i]))
2797 /// isUndefOrInRange - Return true if Val is undef or if its value falls within
2798 /// the specified range (L, H].
2799 static bool isUndefOrInRange(int Val, int Low, int Hi) {
2800 return (Val < 0) || (Val >= Low && Val < Hi);
2803 /// isUndefOrEqual - Val is either less than zero (undef) or equal to the
2804 /// specified value.
2805 static bool isUndefOrEqual(int Val, int CmpVal) {
2806 if (Val < 0 || Val == CmpVal)
2811 /// isPSHUFDMask - Return true if the node specifies a shuffle of elements that
2812 /// is suitable for input to PSHUFD or PSHUFW. That is, it doesn't reference
2813 /// the second operand.
2814 static bool isPSHUFDMask(const SmallVectorImpl<int> &Mask, EVT VT) {
2815 if (VT == MVT::v4f32 || VT == MVT::v4i32 || VT == MVT::v4i16)
2816 return (Mask[0] < 4 && Mask[1] < 4 && Mask[2] < 4 && Mask[3] < 4);
2817 if (VT == MVT::v2f64 || VT == MVT::v2i64)
2818 return (Mask[0] < 2 && Mask[1] < 2);
2822 bool X86::isPSHUFDMask(ShuffleVectorSDNode *N) {
2823 SmallVector<int, 8> M;
2825 return ::isPSHUFDMask(M, N->getValueType(0));
2828 /// isPSHUFHWMask - Return true if the node specifies a shuffle of elements that
2829 /// is suitable for input to PSHUFHW.
2830 static bool isPSHUFHWMask(const SmallVectorImpl<int> &Mask, EVT VT) {
2831 if (VT != MVT::v8i16)
2834 // Lower quadword copied in order or undef.
2835 for (int i = 0; i != 4; ++i)
2836 if (Mask[i] >= 0 && Mask[i] != i)
2839 // Upper quadword shuffled.
2840 for (int i = 4; i != 8; ++i)
2841 if (Mask[i] >= 0 && (Mask[i] < 4 || Mask[i] > 7))
2847 bool X86::isPSHUFHWMask(ShuffleVectorSDNode *N) {
2848 SmallVector<int, 8> M;
2850 return ::isPSHUFHWMask(M, N->getValueType(0));
2853 /// isPSHUFLWMask - Return true if the node specifies a shuffle of elements that
2854 /// is suitable for input to PSHUFLW.
2855 static bool isPSHUFLWMask(const SmallVectorImpl<int> &Mask, EVT VT) {
2856 if (VT != MVT::v8i16)
2859 // Upper quadword copied in order.
2860 for (int i = 4; i != 8; ++i)
2861 if (Mask[i] >= 0 && Mask[i] != i)
2864 // Lower quadword shuffled.
2865 for (int i = 0; i != 4; ++i)
2872 bool X86::isPSHUFLWMask(ShuffleVectorSDNode *N) {
2873 SmallVector<int, 8> M;
2875 return ::isPSHUFLWMask(M, N->getValueType(0));
2878 /// isPALIGNRMask - Return true if the node specifies a shuffle of elements that
2879 /// is suitable for input to PALIGNR.
2880 static bool isPALIGNRMask(const SmallVectorImpl<int> &Mask, EVT VT,
2882 int i, e = VT.getVectorNumElements();
2884 // Do not handle v2i64 / v2f64 shuffles with palignr.
2885 if (e < 4 || !hasSSSE3)
2888 for (i = 0; i != e; ++i)
2892 // All undef, not a palignr.
2896 // Determine if it's ok to perform a palignr with only the LHS, since we
2897 // don't have access to the actual shuffle elements to see if RHS is undef.
2898 bool Unary = Mask[i] < (int)e;
2899 bool NeedsUnary = false;
2901 int s = Mask[i] - i;
2903 // Check the rest of the elements to see if they are consecutive.
2904 for (++i; i != e; ++i) {
2909 Unary = Unary && (m < (int)e);
2910 NeedsUnary = NeedsUnary || (m < s);
2912 if (NeedsUnary && !Unary)
2914 if (Unary && m != ((s+i) & (e-1)))
2916 if (!Unary && m != (s+i))
2922 bool X86::isPALIGNRMask(ShuffleVectorSDNode *N) {
2923 SmallVector<int, 8> M;
2925 return ::isPALIGNRMask(M, N->getValueType(0), true);
2928 /// isSHUFPMask - Return true if the specified VECTOR_SHUFFLE operand
2929 /// specifies a shuffle of elements that is suitable for input to SHUFP*.
2930 static bool isSHUFPMask(const SmallVectorImpl<int> &Mask, EVT VT) {
2931 int NumElems = VT.getVectorNumElements();
2932 if (NumElems != 2 && NumElems != 4)
2935 int Half = NumElems / 2;
2936 for (int i = 0; i < Half; ++i)
2937 if (!isUndefOrInRange(Mask[i], 0, NumElems))
2939 for (int i = Half; i < NumElems; ++i)
2940 if (!isUndefOrInRange(Mask[i], NumElems, NumElems*2))
2946 bool X86::isSHUFPMask(ShuffleVectorSDNode *N) {
2947 SmallVector<int, 8> M;
2949 return ::isSHUFPMask(M, N->getValueType(0));
2952 /// isCommutedSHUFP - Returns true if the shuffle mask is exactly
2953 /// the reverse of what x86 shuffles want. x86 shuffles requires the lower
2954 /// half elements to come from vector 1 (which would equal the dest.) and
2955 /// the upper half to come from vector 2.
2956 static bool isCommutedSHUFPMask(const SmallVectorImpl<int> &Mask, EVT VT) {
2957 int NumElems = VT.getVectorNumElements();
2959 if (NumElems != 2 && NumElems != 4)
2962 int Half = NumElems / 2;
2963 for (int i = 0; i < Half; ++i)
2964 if (!isUndefOrInRange(Mask[i], NumElems, NumElems*2))
2966 for (int i = Half; i < NumElems; ++i)
2967 if (!isUndefOrInRange(Mask[i], 0, NumElems))
2972 static bool isCommutedSHUFP(ShuffleVectorSDNode *N) {
2973 SmallVector<int, 8> M;
2975 return isCommutedSHUFPMask(M, N->getValueType(0));
2978 /// isMOVHLPSMask - Return true if the specified VECTOR_SHUFFLE operand
2979 /// specifies a shuffle of elements that is suitable for input to MOVHLPS.
2980 bool X86::isMOVHLPSMask(ShuffleVectorSDNode *N) {
2981 if (N->getValueType(0).getVectorNumElements() != 4)
2984 // Expect bit0 == 6, bit1 == 7, bit2 == 2, bit3 == 3
2985 return isUndefOrEqual(N->getMaskElt(0), 6) &&
2986 isUndefOrEqual(N->getMaskElt(1), 7) &&
2987 isUndefOrEqual(N->getMaskElt(2), 2) &&
2988 isUndefOrEqual(N->getMaskElt(3), 3);
2991 /// isMOVHLPS_v_undef_Mask - Special case of isMOVHLPSMask for canonical form
2992 /// of vector_shuffle v, v, <2, 3, 2, 3>, i.e. vector_shuffle v, undef,
2994 bool X86::isMOVHLPS_v_undef_Mask(ShuffleVectorSDNode *N) {
2995 unsigned NumElems = N->getValueType(0).getVectorNumElements();
3000 return isUndefOrEqual(N->getMaskElt(0), 2) &&
3001 isUndefOrEqual(N->getMaskElt(1), 3) &&
3002 isUndefOrEqual(N->getMaskElt(2), 2) &&
3003 isUndefOrEqual(N->getMaskElt(3), 3);
3006 /// isMOVLPMask - Return true if the specified VECTOR_SHUFFLE operand
3007 /// specifies a shuffle of elements that is suitable for input to MOVLP{S|D}.
3008 bool X86::isMOVLPMask(ShuffleVectorSDNode *N) {
3009 unsigned NumElems = N->getValueType(0).getVectorNumElements();
3011 if (NumElems != 2 && NumElems != 4)
3014 for (unsigned i = 0; i < NumElems/2; ++i)
3015 if (!isUndefOrEqual(N->getMaskElt(i), i + NumElems))
3018 for (unsigned i = NumElems/2; i < NumElems; ++i)
3019 if (!isUndefOrEqual(N->getMaskElt(i), i))
3025 /// isMOVLHPSMask - Return true if the specified VECTOR_SHUFFLE operand
3026 /// specifies a shuffle of elements that is suitable for input to MOVLHPS.
3027 bool X86::isMOVLHPSMask(ShuffleVectorSDNode *N) {
3028 unsigned NumElems = N->getValueType(0).getVectorNumElements();
3030 if (NumElems != 2 && NumElems != 4)
3033 for (unsigned i = 0; i < NumElems/2; ++i)
3034 if (!isUndefOrEqual(N->getMaskElt(i), i))
3037 for (unsigned i = 0; i < NumElems/2; ++i)
3038 if (!isUndefOrEqual(N->getMaskElt(i + NumElems/2), i + NumElems))
3044 /// isUNPCKLMask - Return true if the specified VECTOR_SHUFFLE operand
3045 /// specifies a shuffle of elements that is suitable for input to UNPCKL.
3046 static bool isUNPCKLMask(const SmallVectorImpl<int> &Mask, EVT VT,
3047 bool V2IsSplat = false) {
3048 int NumElts = VT.getVectorNumElements();
3049 if (NumElts != 2 && NumElts != 4 && NumElts != 8 && NumElts != 16)
3052 for (int i = 0, j = 0; i != NumElts; i += 2, ++j) {
3054 int BitI1 = Mask[i+1];
3055 if (!isUndefOrEqual(BitI, j))
3058 if (!isUndefOrEqual(BitI1, NumElts))
3061 if (!isUndefOrEqual(BitI1, j + NumElts))
3068 bool X86::isUNPCKLMask(ShuffleVectorSDNode *N, bool V2IsSplat) {
3069 SmallVector<int, 8> M;
3071 return ::isUNPCKLMask(M, N->getValueType(0), V2IsSplat);
3074 /// isUNPCKHMask - Return true if the specified VECTOR_SHUFFLE operand
3075 /// specifies a shuffle of elements that is suitable for input to UNPCKH.
3076 static bool isUNPCKHMask(const SmallVectorImpl<int> &Mask, EVT VT,
3077 bool V2IsSplat = false) {
3078 int NumElts = VT.getVectorNumElements();
3079 if (NumElts != 2 && NumElts != 4 && NumElts != 8 && NumElts != 16)
3082 for (int i = 0, j = 0; i != NumElts; i += 2, ++j) {
3084 int BitI1 = Mask[i+1];
3085 if (!isUndefOrEqual(BitI, j + NumElts/2))
3088 if (isUndefOrEqual(BitI1, NumElts))
3091 if (!isUndefOrEqual(BitI1, j + NumElts/2 + NumElts))
3098 bool X86::isUNPCKHMask(ShuffleVectorSDNode *N, bool V2IsSplat) {
3099 SmallVector<int, 8> M;
3101 return ::isUNPCKHMask(M, N->getValueType(0), V2IsSplat);
3104 /// isUNPCKL_v_undef_Mask - Special case of isUNPCKLMask for canonical form
3105 /// of vector_shuffle v, v, <0, 4, 1, 5>, i.e. vector_shuffle v, undef,
3107 static bool isUNPCKL_v_undef_Mask(const SmallVectorImpl<int> &Mask, EVT VT) {
3108 int NumElems = VT.getVectorNumElements();
3109 if (NumElems != 2 && NumElems != 4 && NumElems != 8 && NumElems != 16)
3112 for (int i = 0, j = 0; i != NumElems; i += 2, ++j) {
3114 int BitI1 = Mask[i+1];
3115 if (!isUndefOrEqual(BitI, j))
3117 if (!isUndefOrEqual(BitI1, j))
3123 bool X86::isUNPCKL_v_undef_Mask(ShuffleVectorSDNode *N) {
3124 SmallVector<int, 8> M;
3126 return ::isUNPCKL_v_undef_Mask(M, N->getValueType(0));
3129 /// isUNPCKH_v_undef_Mask - Special case of isUNPCKHMask for canonical form
3130 /// of vector_shuffle v, v, <2, 6, 3, 7>, i.e. vector_shuffle v, undef,
3132 static bool isUNPCKH_v_undef_Mask(const SmallVectorImpl<int> &Mask, EVT VT) {
3133 int NumElems = VT.getVectorNumElements();
3134 if (NumElems != 2 && NumElems != 4 && NumElems != 8 && NumElems != 16)
3137 for (int i = 0, j = NumElems / 2; i != NumElems; i += 2, ++j) {
3139 int BitI1 = Mask[i+1];
3140 if (!isUndefOrEqual(BitI, j))
3142 if (!isUndefOrEqual(BitI1, j))
3148 bool X86::isUNPCKH_v_undef_Mask(ShuffleVectorSDNode *N) {
3149 SmallVector<int, 8> M;
3151 return ::isUNPCKH_v_undef_Mask(M, N->getValueType(0));
3154 /// isMOVLMask - Return true if the specified VECTOR_SHUFFLE operand
3155 /// specifies a shuffle of elements that is suitable for input to MOVSS,
3156 /// MOVSD, and MOVD, i.e. setting the lowest element.
3157 static bool isMOVLMask(const SmallVectorImpl<int> &Mask, EVT VT) {
3158 if (VT.getVectorElementType().getSizeInBits() < 32)
3161 int NumElts = VT.getVectorNumElements();
3163 if (!isUndefOrEqual(Mask[0], NumElts))
3166 for (int i = 1; i < NumElts; ++i)
3167 if (!isUndefOrEqual(Mask[i], i))
3173 bool X86::isMOVLMask(ShuffleVectorSDNode *N) {
3174 SmallVector<int, 8> M;
3176 return ::isMOVLMask(M, N->getValueType(0));
3179 /// isCommutedMOVL - Returns true if the shuffle mask is except the reverse
3180 /// of what x86 movss want. X86 movs requires the lowest element to be lowest
3181 /// element of vector 2 and the other elements to come from vector 1 in order.
3182 static bool isCommutedMOVLMask(const SmallVectorImpl<int> &Mask, EVT VT,
3183 bool V2IsSplat = false, bool V2IsUndef = false) {
3184 int NumOps = VT.getVectorNumElements();
3185 if (NumOps != 2 && NumOps != 4 && NumOps != 8 && NumOps != 16)
3188 if (!isUndefOrEqual(Mask[0], 0))
3191 for (int i = 1; i < NumOps; ++i)
3192 if (!(isUndefOrEqual(Mask[i], i+NumOps) ||
3193 (V2IsUndef && isUndefOrInRange(Mask[i], NumOps, NumOps*2)) ||
3194 (V2IsSplat && isUndefOrEqual(Mask[i], NumOps))))
3200 static bool isCommutedMOVL(ShuffleVectorSDNode *N, bool V2IsSplat = false,
3201 bool V2IsUndef = false) {
3202 SmallVector<int, 8> M;
3204 return isCommutedMOVLMask(M, N->getValueType(0), V2IsSplat, V2IsUndef);
3207 /// isMOVSHDUPMask - Return true if the specified VECTOR_SHUFFLE operand
3208 /// specifies a shuffle of elements that is suitable for input to MOVSHDUP.
3209 bool X86::isMOVSHDUPMask(ShuffleVectorSDNode *N) {
3210 if (N->getValueType(0).getVectorNumElements() != 4)
3213 // Expect 1, 1, 3, 3
3214 for (unsigned i = 0; i < 2; ++i) {
3215 int Elt = N->getMaskElt(i);
3216 if (Elt >= 0 && Elt != 1)
3221 for (unsigned i = 2; i < 4; ++i) {
3222 int Elt = N->getMaskElt(i);
3223 if (Elt >= 0 && Elt != 3)
3228 // Don't use movshdup if it can be done with a shufps.
3229 // FIXME: verify that matching u, u, 3, 3 is what we want.
3233 /// isMOVSLDUPMask - Return true if the specified VECTOR_SHUFFLE operand
3234 /// specifies a shuffle of elements that is suitable for input to MOVSLDUP.
3235 bool X86::isMOVSLDUPMask(ShuffleVectorSDNode *N) {
3236 if (N->getValueType(0).getVectorNumElements() != 4)
3239 // Expect 0, 0, 2, 2
3240 for (unsigned i = 0; i < 2; ++i)
3241 if (N->getMaskElt(i) > 0)
3245 for (unsigned i = 2; i < 4; ++i) {
3246 int Elt = N->getMaskElt(i);
3247 if (Elt >= 0 && Elt != 2)
3252 // Don't use movsldup if it can be done with a shufps.
3256 /// isMOVDDUPMask - Return true if the specified VECTOR_SHUFFLE operand
3257 /// specifies a shuffle of elements that is suitable for input to MOVDDUP.
3258 bool X86::isMOVDDUPMask(ShuffleVectorSDNode *N) {
3259 int e = N->getValueType(0).getVectorNumElements() / 2;
3261 for (int i = 0; i < e; ++i)
3262 if (!isUndefOrEqual(N->getMaskElt(i), i))
3264 for (int i = 0; i < e; ++i)
3265 if (!isUndefOrEqual(N->getMaskElt(e+i), i))
3270 /// getShuffleSHUFImmediate - Return the appropriate immediate to shuffle
3271 /// the specified VECTOR_SHUFFLE mask with PSHUF* and SHUFP* instructions.
3272 unsigned X86::getShuffleSHUFImmediate(SDNode *N) {
3273 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);
3274 int NumOperands = SVOp->getValueType(0).getVectorNumElements();
3276 unsigned Shift = (NumOperands == 4) ? 2 : 1;
3278 for (int i = 0; i < NumOperands; ++i) {
3279 int Val = SVOp->getMaskElt(NumOperands-i-1);
3280 if (Val < 0) Val = 0;
3281 if (Val >= NumOperands) Val -= NumOperands;
3283 if (i != NumOperands - 1)
3289 /// getShufflePSHUFHWImmediate - Return the appropriate immediate to shuffle
3290 /// the specified VECTOR_SHUFFLE mask with the PSHUFHW instruction.
3291 unsigned X86::getShufflePSHUFHWImmediate(SDNode *N) {
3292 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);
3294 // 8 nodes, but we only care about the last 4.
3295 for (unsigned i = 7; i >= 4; --i) {
3296 int Val = SVOp->getMaskElt(i);
3305 /// getShufflePSHUFLWImmediate - Return the appropriate immediate to shuffle
3306 /// the specified VECTOR_SHUFFLE mask with the PSHUFLW instruction.
3307 unsigned X86::getShufflePSHUFLWImmediate(SDNode *N) {
3308 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);
3310 // 8 nodes, but we only care about the first 4.
3311 for (int i = 3; i >= 0; --i) {
3312 int Val = SVOp->getMaskElt(i);
3321 /// getShufflePALIGNRImmediate - Return the appropriate immediate to shuffle
3322 /// the specified VECTOR_SHUFFLE mask with the PALIGNR instruction.
3323 unsigned X86::getShufflePALIGNRImmediate(SDNode *N) {
3324 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);
3325 EVT VVT = N->getValueType(0);
3326 unsigned EltSize = VVT.getVectorElementType().getSizeInBits() >> 3;
3330 for (i = 0, e = VVT.getVectorNumElements(); i != e; ++i) {
3331 Val = SVOp->getMaskElt(i);
3335 return (Val - i) * EltSize;
3338 /// isZeroNode - Returns true if Elt is a constant zero or a floating point
3340 bool X86::isZeroNode(SDValue Elt) {
3341 return ((isa<ConstantSDNode>(Elt) &&
3342 cast<ConstantSDNode>(Elt)->isNullValue()) ||
3343 (isa<ConstantFPSDNode>(Elt) &&
3344 cast<ConstantFPSDNode>(Elt)->getValueAPF().isPosZero()));
3347 /// CommuteVectorShuffle - Swap vector_shuffle operands as well as values in
3348 /// their permute mask.
3349 static SDValue CommuteVectorShuffle(ShuffleVectorSDNode *SVOp,
3350 SelectionDAG &DAG) {
3351 EVT VT = SVOp->getValueType(0);
3352 unsigned NumElems = VT.getVectorNumElements();
3353 SmallVector<int, 8> MaskVec;
3355 for (unsigned i = 0; i != NumElems; ++i) {
3356 int idx = SVOp->getMaskElt(i);
3358 MaskVec.push_back(idx);
3359 else if (idx < (int)NumElems)
3360 MaskVec.push_back(idx + NumElems);
3362 MaskVec.push_back(idx - NumElems);
3364 return DAG.getVectorShuffle(VT, SVOp->getDebugLoc(), SVOp->getOperand(1),
3365 SVOp->getOperand(0), &MaskVec[0]);
3368 /// CommuteVectorShuffleMask - Change values in a shuffle permute mask assuming
3369 /// the two vector operands have swapped position.
3370 static void CommuteVectorShuffleMask(SmallVectorImpl<int> &Mask, EVT VT) {
3371 unsigned NumElems = VT.getVectorNumElements();
3372 for (unsigned i = 0; i != NumElems; ++i) {
3376 else if (idx < (int)NumElems)
3377 Mask[i] = idx + NumElems;
3379 Mask[i] = idx - NumElems;
3383 /// ShouldXformToMOVHLPS - Return true if the node should be transformed to
3384 /// match movhlps. The lower half elements should come from upper half of
3385 /// V1 (and in order), and the upper half elements should come from the upper
3386 /// half of V2 (and in order).
3387 static bool ShouldXformToMOVHLPS(ShuffleVectorSDNode *Op) {
3388 if (Op->getValueType(0).getVectorNumElements() != 4)
3390 for (unsigned i = 0, e = 2; i != e; ++i)
3391 if (!isUndefOrEqual(Op->getMaskElt(i), i+2))
3393 for (unsigned i = 2; i != 4; ++i)
3394 if (!isUndefOrEqual(Op->getMaskElt(i), i+4))
3399 /// isScalarLoadToVector - Returns true if the node is a scalar load that
3400 /// is promoted to a vector. It also returns the LoadSDNode by reference if
3402 static bool isScalarLoadToVector(SDNode *N, LoadSDNode **LD = NULL) {
3403 if (N->getOpcode() != ISD::SCALAR_TO_VECTOR)
3405 N = N->getOperand(0).getNode();
3406 if (!ISD::isNON_EXTLoad(N))
3409 *LD = cast<LoadSDNode>(N);
3413 /// ShouldXformToMOVLP{S|D} - Return true if the node should be transformed to
3414 /// match movlp{s|d}. The lower half elements should come from lower half of
3415 /// V1 (and in order), and the upper half elements should come from the upper
3416 /// half of V2 (and in order). And since V1 will become the source of the
3417 /// MOVLP, it must be either a vector load or a scalar load to vector.
3418 static bool ShouldXformToMOVLP(SDNode *V1, SDNode *V2,
3419 ShuffleVectorSDNode *Op) {
3420 if (!ISD::isNON_EXTLoad(V1) && !isScalarLoadToVector(V1))
3422 // Is V2 is a vector load, don't do this transformation. We will try to use
3423 // load folding shufps op.
3424 if (ISD::isNON_EXTLoad(V2))
3427 unsigned NumElems = Op->getValueType(0).getVectorNumElements();
3429 if (NumElems != 2 && NumElems != 4)
3431 for (unsigned i = 0, e = NumElems/2; i != e; ++i)
3432 if (!isUndefOrEqual(Op->getMaskElt(i), i))
3434 for (unsigned i = NumElems/2; i != NumElems; ++i)
3435 if (!isUndefOrEqual(Op->getMaskElt(i), i+NumElems))
3440 /// isSplatVector - Returns true if N is a BUILD_VECTOR node whose elements are
3442 static bool isSplatVector(SDNode *N) {
3443 if (N->getOpcode() != ISD::BUILD_VECTOR)
3446 SDValue SplatValue = N->getOperand(0);
3447 for (unsigned i = 1, e = N->getNumOperands(); i != e; ++i)
3448 if (N->getOperand(i) != SplatValue)
3453 /// isZeroShuffle - Returns true if N is a VECTOR_SHUFFLE that can be resolved
3454 /// to an zero vector.
3455 /// FIXME: move to dag combiner / method on ShuffleVectorSDNode
3456 static bool isZeroShuffle(ShuffleVectorSDNode *N) {
3457 SDValue V1 = N->getOperand(0);
3458 SDValue V2 = N->getOperand(1);
3459 unsigned NumElems = N->getValueType(0).getVectorNumElements();
3460 for (unsigned i = 0; i != NumElems; ++i) {
3461 int Idx = N->getMaskElt(i);
3462 if (Idx >= (int)NumElems) {
3463 unsigned Opc = V2.getOpcode();
3464 if (Opc == ISD::UNDEF || ISD::isBuildVectorAllZeros(V2.getNode()))
3466 if (Opc != ISD::BUILD_VECTOR ||
3467 !X86::isZeroNode(V2.getOperand(Idx-NumElems)))
3469 } else if (Idx >= 0) {
3470 unsigned Opc = V1.getOpcode();
3471 if (Opc == ISD::UNDEF || ISD::isBuildVectorAllZeros(V1.getNode()))
3473 if (Opc != ISD::BUILD_VECTOR ||
3474 !X86::isZeroNode(V1.getOperand(Idx)))
3481 /// getZeroVector - Returns a vector of specified type with all zero elements.
3483 static SDValue getZeroVector(EVT VT, bool HasSSE2, SelectionDAG &DAG,
3485 assert(VT.isVector() && "Expected a vector type");
3487 // Always build zero vectors as <4 x i32> or <2 x i32> bitcasted
3488 // to their dest type. This ensures they get CSE'd.
3490 if (VT.getSizeInBits() == 64) { // MMX
3491 SDValue Cst = DAG.getTargetConstant(0, MVT::i32);
3492 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v2i32, Cst, Cst);
3493 } else if (VT.getSizeInBits() == 128) {
3494 if (HasSSE2) { // SSE2
3495 SDValue Cst = DAG.getTargetConstant(0, MVT::i32);
3496 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, Cst, Cst, Cst, Cst);
3498 SDValue Cst = DAG.getTargetConstantFP(+0.0, MVT::f32);
3499 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4f32, Cst, Cst, Cst, Cst);
3501 } else if (VT.getSizeInBits() == 256) { // AVX
3502 // 256-bit logic and arithmetic instructions in AVX are
3503 // all floating-point, no support for integer ops. Default
3504 // to emitting fp zeroed vectors then.
3505 SDValue Cst = DAG.getTargetConstantFP(+0.0, MVT::f32);
3506 SDValue Ops[] = { Cst, Cst, Cst, Cst, Cst, Cst, Cst, Cst };
3507 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v8f32, Ops, 8);
3509 return DAG.getNode(ISD::BIT_CONVERT, dl, VT, Vec);
3512 /// getOnesVector - Returns a vector of specified type with all bits set.
3514 static SDValue getOnesVector(EVT VT, SelectionDAG &DAG, DebugLoc dl) {
3515 assert(VT.isVector() && "Expected a vector type");
3517 // Always build ones vectors as <4 x i32> or <2 x i32> bitcasted to their dest
3518 // type. This ensures they get CSE'd.
3519 SDValue Cst = DAG.getTargetConstant(~0U, MVT::i32);
3521 if (VT.getSizeInBits() == 64) // MMX
3522 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v2i32, Cst, Cst);
3524 Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, Cst, Cst, Cst, Cst);
3525 return DAG.getNode(ISD::BIT_CONVERT, dl, VT, Vec);
3529 /// NormalizeMask - V2 is a splat, modify the mask (if needed) so all elements
3530 /// that point to V2 points to its first element.
3531 static SDValue NormalizeMask(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG) {
3532 EVT VT = SVOp->getValueType(0);
3533 unsigned NumElems = VT.getVectorNumElements();
3535 bool Changed = false;
3536 SmallVector<int, 8> MaskVec;
3537 SVOp->getMask(MaskVec);
3539 for (unsigned i = 0; i != NumElems; ++i) {
3540 if (MaskVec[i] > (int)NumElems) {
3541 MaskVec[i] = NumElems;
3546 return DAG.getVectorShuffle(VT, SVOp->getDebugLoc(), SVOp->getOperand(0),
3547 SVOp->getOperand(1), &MaskVec[0]);
3548 return SDValue(SVOp, 0);
3551 /// getMOVLMask - Returns a vector_shuffle mask for an movs{s|d}, movd
3552 /// operation of specified width.
3553 static SDValue getMOVL(SelectionDAG &DAG, DebugLoc dl, EVT VT, SDValue V1,
3555 unsigned NumElems = VT.getVectorNumElements();
3556 SmallVector<int, 8> Mask;
3557 Mask.push_back(NumElems);
3558 for (unsigned i = 1; i != NumElems; ++i)
3560 return DAG.getVectorShuffle(VT, dl, V1, V2, &Mask[0]);
3563 /// getUnpackl - Returns a vector_shuffle node for an unpackl operation.
3564 static SDValue getUnpackl(SelectionDAG &DAG, DebugLoc dl, EVT VT, SDValue V1,
3566 unsigned NumElems = VT.getVectorNumElements();
3567 SmallVector<int, 8> Mask;
3568 for (unsigned i = 0, e = NumElems/2; i != e; ++i) {
3570 Mask.push_back(i + NumElems);
3572 return DAG.getVectorShuffle(VT, dl, V1, V2, &Mask[0]);
3575 /// getUnpackhMask - Returns a vector_shuffle node for an unpackh operation.
3576 static SDValue getUnpackh(SelectionDAG &DAG, DebugLoc dl, EVT VT, SDValue V1,
3578 unsigned NumElems = VT.getVectorNumElements();
3579 unsigned Half = NumElems/2;
3580 SmallVector<int, 8> Mask;
3581 for (unsigned i = 0; i != Half; ++i) {
3582 Mask.push_back(i + Half);
3583 Mask.push_back(i + NumElems + Half);
3585 return DAG.getVectorShuffle(VT, dl, V1, V2, &Mask[0]);
3588 /// PromoteSplat - Promote a splat of v4i32, v8i16 or v16i8 to v4f32.
3589 static SDValue PromoteSplat(ShuffleVectorSDNode *SV, SelectionDAG &DAG) {
3590 if (SV->getValueType(0).getVectorNumElements() <= 4)
3591 return SDValue(SV, 0);
3593 EVT PVT = MVT::v4f32;
3594 EVT VT = SV->getValueType(0);
3595 DebugLoc dl = SV->getDebugLoc();
3596 SDValue V1 = SV->getOperand(0);
3597 int NumElems = VT.getVectorNumElements();
3598 int EltNo = SV->getSplatIndex();
3600 // unpack elements to the correct location
3601 while (NumElems > 4) {
3602 if (EltNo < NumElems/2) {
3603 V1 = getUnpackl(DAG, dl, VT, V1, V1);
3605 V1 = getUnpackh(DAG, dl, VT, V1, V1);
3606 EltNo -= NumElems/2;
3611 // Perform the splat.
3612 int SplatMask[4] = { EltNo, EltNo, EltNo, EltNo };
3613 V1 = DAG.getNode(ISD::BIT_CONVERT, dl, PVT, V1);
3614 V1 = DAG.getVectorShuffle(PVT, dl, V1, DAG.getUNDEF(PVT), &SplatMask[0]);
3615 return DAG.getNode(ISD::BIT_CONVERT, dl, VT, V1);
3618 /// getShuffleVectorZeroOrUndef - Return a vector_shuffle of the specified
3619 /// vector of zero or undef vector. This produces a shuffle where the low
3620 /// element of V2 is swizzled into the zero/undef vector, landing at element
3621 /// Idx. This produces a shuffle mask like 4,1,2,3 (idx=0) or 0,1,2,4 (idx=3).
3622 static SDValue getShuffleVectorZeroOrUndef(SDValue V2, unsigned Idx,
3623 bool isZero, bool HasSSE2,
3624 SelectionDAG &DAG) {
3625 EVT VT = V2.getValueType();
3627 ? getZeroVector(VT, HasSSE2, DAG, V2.getDebugLoc()) : DAG.getUNDEF(VT);
3628 unsigned NumElems = VT.getVectorNumElements();
3629 SmallVector<int, 16> MaskVec;
3630 for (unsigned i = 0; i != NumElems; ++i)
3631 // If this is the insertion idx, put the low elt of V2 here.
3632 MaskVec.push_back(i == Idx ? NumElems : i);
3633 return DAG.getVectorShuffle(VT, V2.getDebugLoc(), V1, V2, &MaskVec[0]);
3636 /// getShuffleScalarElt - Returns the scalar element that will make up the ith
3637 /// element of the result of the vector shuffle.
3638 SDValue getShuffleScalarElt(SDNode *N, int Index, SelectionDAG &DAG) {
3639 SDValue V = SDValue(N, 0);
3640 EVT VT = V.getValueType();
3641 unsigned Opcode = V.getOpcode();
3642 int NumElems = VT.getVectorNumElements();
3644 // Recurse into ISD::VECTOR_SHUFFLE node to find scalars.
3645 if (const ShuffleVectorSDNode *SV = dyn_cast<ShuffleVectorSDNode>(N)) {
3646 Index = SV->getMaskElt(Index);
3649 return DAG.getUNDEF(VT.getVectorElementType());
3651 SDValue NewV = (Index < NumElems) ? SV->getOperand(0) : SV->getOperand(1);
3652 return getShuffleScalarElt(NewV.getNode(), Index % NumElems, DAG);
3655 // Recurse into target specific vector shuffles to find scalars.
3656 if (isTargetShuffle(Opcode)) {
3660 // Only care about the second operand, which can contain
3661 // a scalar_to_vector which we are looking for.
3662 return getShuffleScalarElt(V.getOperand(1).getNode(),
3663 0 /* Index */, DAG);
3665 assert("not implemented for target shuffle node");
3670 // Actual nodes that may contain scalar elements
3671 if (Opcode == ISD::BIT_CONVERT) {
3672 V = V.getOperand(0);
3673 EVT SrcVT = V.getValueType();
3675 if (!SrcVT.isVector() || SrcVT.getVectorNumElements() != (unsigned)NumElems)
3679 if (V.getOpcode() == ISD::SCALAR_TO_VECTOR)
3680 return (Index == 0) ? V.getOperand(0)
3681 : DAG.getUNDEF(VT.getVectorElementType());
3683 if (V.getOpcode() == ISD::BUILD_VECTOR)
3684 return V.getOperand(Index);
3689 /// getNumOfConsecutiveZeros - Return the number of elements of a vector
3690 /// shuffle operation which come from a consecutively from a zero. The
3691 /// search can start in two diferent directions, from left or right.
3693 unsigned getNumOfConsecutiveZeros(SDNode *N, int NumElems,
3694 bool ZerosFromLeft, SelectionDAG &DAG) {
3697 while (i < NumElems) {
3698 unsigned Index = ZerosFromLeft ? i : NumElems-i-1;
3699 SDValue Elt = getShuffleScalarElt(N, Index, DAG);
3700 if (!(Elt.getNode() &&
3701 (Elt.getOpcode() == ISD::UNDEF || X86::isZeroNode(Elt))))
3709 /// isShuffleMaskConsecutive - Check if the shuffle mask indicies from MaskI to
3710 /// MaskE correspond consecutively to elements from one of the vector operands,
3711 /// starting from its index OpIdx. Also tell OpNum which source vector operand.
3713 bool isShuffleMaskConsecutive(ShuffleVectorSDNode *SVOp, int MaskI, int MaskE,
3714 int OpIdx, int NumElems, unsigned &OpNum) {
3715 bool SeenV1 = false;
3716 bool SeenV2 = false;
3718 for (int i = MaskI; i <= MaskE; ++i, ++OpIdx) {
3719 int Idx = SVOp->getMaskElt(i);
3720 // Ignore undef indicies
3729 // Only accept consecutive elements from the same vector
3730 if ((Idx % NumElems != OpIdx) || (SeenV1 && SeenV2))
3734 OpNum = SeenV1 ? 0 : 1;
3738 /// isVectorShiftRight - Returns true if the shuffle can be implemented as a
3739 /// logical left shift of a vector.
3740 static bool isVectorShiftRight(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG,
3741 bool &isLeft, SDValue &ShVal, unsigned &ShAmt) {
3742 unsigned NumElems = SVOp->getValueType(0).getVectorNumElements();
3743 unsigned NumZeros = getNumOfConsecutiveZeros(SVOp, NumElems,
3744 false /* check zeros from right */, DAG);
3750 // Considering the elements in the mask that are not consecutive zeros,
3751 // check if they consecutively come from only one of the source vectors.
3753 // V1 = {X, A, B, C} 0
3755 // vector_shuffle V1, V2 <1, 2, 3, X>
3757 if (!isShuffleMaskConsecutive(SVOp,
3758 0, // Mask Start Index
3759 NumElems-NumZeros-1, // Mask End Index
3760 NumZeros, // Where to start looking in the src vector
3761 NumElems, // Number of elements in vector
3762 OpSrc)) // Which source operand ?
3767 ShVal = SVOp->getOperand(OpSrc);
3771 /// isVectorShiftLeft - Returns true if the shuffle can be implemented as a
3772 /// logical left shift of a vector.
3773 static bool isVectorShiftLeft(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG,
3774 bool &isLeft, SDValue &ShVal, unsigned &ShAmt) {
3775 unsigned NumElems = SVOp->getValueType(0).getVectorNumElements();
3776 unsigned NumZeros = getNumOfConsecutiveZeros(SVOp, NumElems,
3777 true /* check zeros from left */, DAG);
3783 // Considering the elements in the mask that are not consecutive zeros,
3784 // check if they consecutively come from only one of the source vectors.
3786 // 0 { A, B, X, X } = V2
3788 // vector_shuffle V1, V2 <X, X, 4, 5>
3790 if (!isShuffleMaskConsecutive(SVOp,
3791 NumZeros, // Mask Start Index
3792 NumElems-1, // Mask End Index
3793 0, // Where to start looking in the src vector
3794 NumElems, // Number of elements in vector
3795 OpSrc)) // Which source operand ?
3800 ShVal = SVOp->getOperand(OpSrc);
3804 /// isVectorShift - Returns true if the shuffle can be implemented as a
3805 /// logical left or right shift of a vector.
3806 static bool isVectorShift(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG,
3807 bool &isLeft, SDValue &ShVal, unsigned &ShAmt) {
3808 if (isVectorShiftLeft(SVOp, DAG, isLeft, ShVal, ShAmt) ||
3809 isVectorShiftRight(SVOp, DAG, isLeft, ShVal, ShAmt))
3815 /// LowerBuildVectorv16i8 - Custom lower build_vector of v16i8.
3817 static SDValue LowerBuildVectorv16i8(SDValue Op, unsigned NonZeros,
3818 unsigned NumNonZero, unsigned NumZero,
3820 const TargetLowering &TLI) {
3824 DebugLoc dl = Op.getDebugLoc();
3827 for (unsigned i = 0; i < 16; ++i) {
3828 bool ThisIsNonZero = (NonZeros & (1 << i)) != 0;
3829 if (ThisIsNonZero && First) {
3831 V = getZeroVector(MVT::v8i16, true, DAG, dl);
3833 V = DAG.getUNDEF(MVT::v8i16);
3838 SDValue ThisElt(0, 0), LastElt(0, 0);
3839 bool LastIsNonZero = (NonZeros & (1 << (i-1))) != 0;
3840 if (LastIsNonZero) {
3841 LastElt = DAG.getNode(ISD::ZERO_EXTEND, dl,
3842 MVT::i16, Op.getOperand(i-1));
3844 if (ThisIsNonZero) {
3845 ThisElt = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i16, Op.getOperand(i));
3846 ThisElt = DAG.getNode(ISD::SHL, dl, MVT::i16,
3847 ThisElt, DAG.getConstant(8, MVT::i8));
3849 ThisElt = DAG.getNode(ISD::OR, dl, MVT::i16, ThisElt, LastElt);
3853 if (ThisElt.getNode())
3854 V = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, V, ThisElt,
3855 DAG.getIntPtrConstant(i/2));
3859 return DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v16i8, V);
3862 /// LowerBuildVectorv8i16 - Custom lower build_vector of v8i16.
3864 static SDValue LowerBuildVectorv8i16(SDValue Op, unsigned NonZeros,
3865 unsigned NumNonZero, unsigned NumZero,
3867 const TargetLowering &TLI) {
3871 DebugLoc dl = Op.getDebugLoc();
3874 for (unsigned i = 0; i < 8; ++i) {
3875 bool isNonZero = (NonZeros & (1 << i)) != 0;
3879 V = getZeroVector(MVT::v8i16, true, DAG, dl);
3881 V = DAG.getUNDEF(MVT::v8i16);
3884 V = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl,
3885 MVT::v8i16, V, Op.getOperand(i),
3886 DAG.getIntPtrConstant(i));
3893 /// getVShift - Return a vector logical shift node.
3895 static SDValue getVShift(bool isLeft, EVT VT, SDValue SrcOp,
3896 unsigned NumBits, SelectionDAG &DAG,
3897 const TargetLowering &TLI, DebugLoc dl) {
3898 bool isMMX = VT.getSizeInBits() == 64;
3899 EVT ShVT = isMMX ? MVT::v1i64 : MVT::v2i64;
3900 unsigned Opc = isLeft ? X86ISD::VSHL : X86ISD::VSRL;
3901 SrcOp = DAG.getNode(ISD::BIT_CONVERT, dl, ShVT, SrcOp);
3902 return DAG.getNode(ISD::BIT_CONVERT, dl, VT,
3903 DAG.getNode(Opc, dl, ShVT, SrcOp,
3904 DAG.getConstant(NumBits, TLI.getShiftAmountTy())));
3908 X86TargetLowering::LowerAsSplatVectorLoad(SDValue SrcOp, EVT VT, DebugLoc dl,
3909 SelectionDAG &DAG) const {
3911 // Check if the scalar load can be widened into a vector load. And if
3912 // the address is "base + cst" see if the cst can be "absorbed" into
3913 // the shuffle mask.
3914 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(SrcOp)) {
3915 SDValue Ptr = LD->getBasePtr();
3916 if (!ISD::isNormalLoad(LD) || LD->isVolatile())
3918 EVT PVT = LD->getValueType(0);
3919 if (PVT != MVT::i32 && PVT != MVT::f32)
3924 if (FrameIndexSDNode *FINode = dyn_cast<FrameIndexSDNode>(Ptr)) {
3925 FI = FINode->getIndex();
3927 } else if (Ptr.getOpcode() == ISD::ADD &&
3928 isa<ConstantSDNode>(Ptr.getOperand(1)) &&
3929 isa<FrameIndexSDNode>(Ptr.getOperand(0))) {
3930 FI = cast<FrameIndexSDNode>(Ptr.getOperand(0))->getIndex();
3931 Offset = Ptr.getConstantOperandVal(1);
3932 Ptr = Ptr.getOperand(0);
3937 SDValue Chain = LD->getChain();
3938 // Make sure the stack object alignment is at least 16.
3939 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
3940 if (DAG.InferPtrAlignment(Ptr) < 16) {
3941 if (MFI->isFixedObjectIndex(FI)) {
3942 // Can't change the alignment. FIXME: It's possible to compute
3943 // the exact stack offset and reference FI + adjust offset instead.
3944 // If someone *really* cares about this. That's the way to implement it.
3947 MFI->setObjectAlignment(FI, 16);
3951 // (Offset % 16) must be multiple of 4. Then address is then
3952 // Ptr + (Offset & ~15).
3955 if ((Offset % 16) & 3)
3957 int64_t StartOffset = Offset & ~15;
3959 Ptr = DAG.getNode(ISD::ADD, Ptr.getDebugLoc(), Ptr.getValueType(),
3960 Ptr,DAG.getConstant(StartOffset, Ptr.getValueType()));
3962 int EltNo = (Offset - StartOffset) >> 2;
3963 int Mask[4] = { EltNo, EltNo, EltNo, EltNo };
3964 EVT VT = (PVT == MVT::i32) ? MVT::v4i32 : MVT::v4f32;
3965 SDValue V1 = DAG.getLoad(VT, dl, Chain, Ptr,LD->getSrcValue(),0,
3967 // Canonicalize it to a v4i32 shuffle.
3968 V1 = DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v4i32, V1);
3969 return DAG.getNode(ISD::BIT_CONVERT, dl, VT,
3970 DAG.getVectorShuffle(MVT::v4i32, dl, V1,
3971 DAG.getUNDEF(MVT::v4i32), &Mask[0]));
3977 /// EltsFromConsecutiveLoads - Given the initializing elements 'Elts' of a
3978 /// vector of type 'VT', see if the elements can be replaced by a single large
3979 /// load which has the same value as a build_vector whose operands are 'elts'.
3981 /// Example: <load i32 *a, load i32 *a+4, undef, undef> -> zextload a
3983 /// FIXME: we'd also like to handle the case where the last elements are zero
3984 /// rather than undef via VZEXT_LOAD, but we do not detect that case today.
3985 /// There's even a handy isZeroNode for that purpose.
3986 static SDValue EltsFromConsecutiveLoads(EVT VT, SmallVectorImpl<SDValue> &Elts,
3987 DebugLoc &dl, SelectionDAG &DAG) {
3988 EVT EltVT = VT.getVectorElementType();
3989 unsigned NumElems = Elts.size();
3991 LoadSDNode *LDBase = NULL;
3992 unsigned LastLoadedElt = -1U;
3994 // For each element in the initializer, see if we've found a load or an undef.
3995 // If we don't find an initial load element, or later load elements are
3996 // non-consecutive, bail out.
3997 for (unsigned i = 0; i < NumElems; ++i) {
3998 SDValue Elt = Elts[i];
4000 if (!Elt.getNode() ||
4001 (Elt.getOpcode() != ISD::UNDEF && !ISD::isNON_EXTLoad(Elt.getNode())))
4004 if (Elt.getNode()->getOpcode() == ISD::UNDEF)
4006 LDBase = cast<LoadSDNode>(Elt.getNode());
4010 if (Elt.getOpcode() == ISD::UNDEF)
4013 LoadSDNode *LD = cast<LoadSDNode>(Elt);
4014 if (!DAG.isConsecutiveLoad(LD, LDBase, EltVT.getSizeInBits()/8, i))
4019 // If we have found an entire vector of loads and undefs, then return a large
4020 // load of the entire vector width starting at the base pointer. If we found
4021 // consecutive loads for the low half, generate a vzext_load node.
4022 if (LastLoadedElt == NumElems - 1) {
4023 if (DAG.InferPtrAlignment(LDBase->getBasePtr()) >= 16)
4024 return DAG.getLoad(VT, dl, LDBase->getChain(), LDBase->getBasePtr(),
4025 LDBase->getSrcValue(), LDBase->getSrcValueOffset(),
4026 LDBase->isVolatile(), LDBase->isNonTemporal(), 0);
4027 return DAG.getLoad(VT, dl, LDBase->getChain(), LDBase->getBasePtr(),
4028 LDBase->getSrcValue(), LDBase->getSrcValueOffset(),
4029 LDBase->isVolatile(), LDBase->isNonTemporal(),
4030 LDBase->getAlignment());
4031 } else if (NumElems == 4 && LastLoadedElt == 1) {
4032 SDVTList Tys = DAG.getVTList(MVT::v2i64, MVT::Other);
4033 SDValue Ops[] = { LDBase->getChain(), LDBase->getBasePtr() };
4034 SDValue ResNode = DAG.getNode(X86ISD::VZEXT_LOAD, dl, Tys, Ops, 2);
4035 return DAG.getNode(ISD::BIT_CONVERT, dl, VT, ResNode);
4041 X86TargetLowering::LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG) const {
4042 DebugLoc dl = Op.getDebugLoc();
4043 // All zero's are handled with pxor in SSE2 and above, xorps in SSE1.
4044 // All one's are handled with pcmpeqd. In AVX, zero's are handled with
4045 // vpxor in 128-bit and xor{pd,ps} in 256-bit, but no 256 version of pcmpeqd
4046 // is present, so AllOnes is ignored.
4047 if (ISD::isBuildVectorAllZeros(Op.getNode()) ||
4048 (Op.getValueType().getSizeInBits() != 256 &&
4049 ISD::isBuildVectorAllOnes(Op.getNode()))) {
4050 // Canonicalize this to either <4 x i32> or <2 x i32> (SSE vs MMX) to
4051 // 1) ensure the zero vectors are CSE'd, and 2) ensure that i64 scalars are
4052 // eliminated on x86-32 hosts.
4053 if (Op.getValueType() == MVT::v4i32 || Op.getValueType() == MVT::v2i32)
4056 if (ISD::isBuildVectorAllOnes(Op.getNode()))
4057 return getOnesVector(Op.getValueType(), DAG, dl);
4058 return getZeroVector(Op.getValueType(), Subtarget->hasSSE2(), DAG, dl);
4061 EVT VT = Op.getValueType();
4062 EVT ExtVT = VT.getVectorElementType();
4063 unsigned EVTBits = ExtVT.getSizeInBits();
4065 unsigned NumElems = Op.getNumOperands();
4066 unsigned NumZero = 0;
4067 unsigned NumNonZero = 0;
4068 unsigned NonZeros = 0;
4069 bool IsAllConstants = true;
4070 SmallSet<SDValue, 8> Values;
4071 for (unsigned i = 0; i < NumElems; ++i) {
4072 SDValue Elt = Op.getOperand(i);
4073 if (Elt.getOpcode() == ISD::UNDEF)
4076 if (Elt.getOpcode() != ISD::Constant &&
4077 Elt.getOpcode() != ISD::ConstantFP)
4078 IsAllConstants = false;
4079 if (X86::isZeroNode(Elt))
4082 NonZeros |= (1 << i);
4087 // All undef vector. Return an UNDEF. All zero vectors were handled above.
4088 if (NumNonZero == 0)
4089 return DAG.getUNDEF(VT);
4091 // Special case for single non-zero, non-undef, element.
4092 if (NumNonZero == 1) {
4093 unsigned Idx = CountTrailingZeros_32(NonZeros);
4094 SDValue Item = Op.getOperand(Idx);
4096 // If this is an insertion of an i64 value on x86-32, and if the top bits of
4097 // the value are obviously zero, truncate the value to i32 and do the
4098 // insertion that way. Only do this if the value is non-constant or if the
4099 // value is a constant being inserted into element 0. It is cheaper to do
4100 // a constant pool load than it is to do a movd + shuffle.
4101 if (ExtVT == MVT::i64 && !Subtarget->is64Bit() &&
4102 (!IsAllConstants || Idx == 0)) {
4103 if (DAG.MaskedValueIsZero(Item, APInt::getBitsSet(64, 32, 64))) {
4104 // Handle MMX and SSE both.
4105 EVT VecVT = VT == MVT::v2i64 ? MVT::v4i32 : MVT::v2i32;
4106 unsigned VecElts = VT == MVT::v2i64 ? 4 : 2;
4108 // Truncate the value (which may itself be a constant) to i32, and
4109 // convert it to a vector with movd (S2V+shuffle to zero extend).
4110 Item = DAG.getNode(ISD::TRUNCATE, dl, MVT::i32, Item);
4111 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VecVT, Item);
4112 Item = getShuffleVectorZeroOrUndef(Item, 0, true,
4113 Subtarget->hasSSE2(), DAG);
4115 // Now we have our 32-bit value zero extended in the low element of
4116 // a vector. If Idx != 0, swizzle it into place.
4118 SmallVector<int, 4> Mask;
4119 Mask.push_back(Idx);
4120 for (unsigned i = 1; i != VecElts; ++i)
4122 Item = DAG.getVectorShuffle(VecVT, dl, Item,
4123 DAG.getUNDEF(Item.getValueType()),
4126 return DAG.getNode(ISD::BIT_CONVERT, dl, Op.getValueType(), Item);
4130 // If we have a constant or non-constant insertion into the low element of
4131 // a vector, we can do this with SCALAR_TO_VECTOR + shuffle of zero into
4132 // the rest of the elements. This will be matched as movd/movq/movss/movsd
4133 // depending on what the source datatype is.
4136 return DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Item);
4137 } else if (ExtVT == MVT::i32 || ExtVT == MVT::f32 || ExtVT == MVT::f64 ||
4138 (ExtVT == MVT::i64 && Subtarget->is64Bit())) {
4139 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Item);
4140 // Turn it into a MOVL (i.e. movss, movsd, or movd) to a zero vector.
4141 return getShuffleVectorZeroOrUndef(Item, 0, true, Subtarget->hasSSE2(),
4143 } else if (ExtVT == MVT::i16 || ExtVT == MVT::i8) {
4144 Item = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, Item);
4145 EVT MiddleVT = VT.getSizeInBits() == 64 ? MVT::v2i32 : MVT::v4i32;
4146 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MiddleVT, Item);
4147 Item = getShuffleVectorZeroOrUndef(Item, 0, true,
4148 Subtarget->hasSSE2(), DAG);
4149 return DAG.getNode(ISD::BIT_CONVERT, dl, VT, Item);
4153 // Is it a vector logical left shift?
4154 if (NumElems == 2 && Idx == 1 &&
4155 X86::isZeroNode(Op.getOperand(0)) &&
4156 !X86::isZeroNode(Op.getOperand(1))) {
4157 unsigned NumBits = VT.getSizeInBits();
4158 return getVShift(true, VT,
4159 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
4160 VT, Op.getOperand(1)),
4161 NumBits/2, DAG, *this, dl);
4164 if (IsAllConstants) // Otherwise, it's better to do a constpool load.
4167 // Otherwise, if this is a vector with i32 or f32 elements, and the element
4168 // is a non-constant being inserted into an element other than the low one,
4169 // we can't use a constant pool load. Instead, use SCALAR_TO_VECTOR (aka
4170 // movd/movss) to move this into the low element, then shuffle it into
4172 if (EVTBits == 32) {
4173 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Item);
4175 // Turn it into a shuffle of zero and zero-extended scalar to vector.
4176 Item = getShuffleVectorZeroOrUndef(Item, 0, NumZero > 0,
4177 Subtarget->hasSSE2(), DAG);
4178 SmallVector<int, 8> MaskVec;
4179 for (unsigned i = 0; i < NumElems; i++)
4180 MaskVec.push_back(i == Idx ? 0 : 1);
4181 return DAG.getVectorShuffle(VT, dl, Item, DAG.getUNDEF(VT), &MaskVec[0]);
4185 // Splat is obviously ok. Let legalizer expand it to a shuffle.
4186 if (Values.size() == 1) {
4187 if (EVTBits == 32) {
4188 // Instead of a shuffle like this:
4189 // shuffle (scalar_to_vector (load (ptr + 4))), undef, <0, 0, 0, 0>
4190 // Check if it's possible to issue this instead.
4191 // shuffle (vload ptr)), undef, <1, 1, 1, 1>
4192 unsigned Idx = CountTrailingZeros_32(NonZeros);
4193 SDValue Item = Op.getOperand(Idx);
4194 if (Op.getNode()->isOnlyUserOf(Item.getNode()))
4195 return LowerAsSplatVectorLoad(Item, VT, dl, DAG);
4200 // A vector full of immediates; various special cases are already
4201 // handled, so this is best done with a single constant-pool load.
4205 // Let legalizer expand 2-wide build_vectors.
4206 if (EVTBits == 64) {
4207 if (NumNonZero == 1) {
4208 // One half is zero or undef.
4209 unsigned Idx = CountTrailingZeros_32(NonZeros);
4210 SDValue V2 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT,
4211 Op.getOperand(Idx));
4212 return getShuffleVectorZeroOrUndef(V2, Idx, true,
4213 Subtarget->hasSSE2(), DAG);
4218 // If element VT is < 32 bits, convert it to inserts into a zero vector.
4219 if (EVTBits == 8 && NumElems == 16) {
4220 SDValue V = LowerBuildVectorv16i8(Op, NonZeros,NumNonZero,NumZero, DAG,
4222 if (V.getNode()) return V;
4225 if (EVTBits == 16 && NumElems == 8) {
4226 SDValue V = LowerBuildVectorv8i16(Op, NonZeros,NumNonZero,NumZero, DAG,
4228 if (V.getNode()) return V;
4231 // If element VT is == 32 bits, turn it into a number of shuffles.
4232 SmallVector<SDValue, 8> V;
4234 if (NumElems == 4 && NumZero > 0) {
4235 for (unsigned i = 0; i < 4; ++i) {
4236 bool isZero = !(NonZeros & (1 << i));
4238 V[i] = getZeroVector(VT, Subtarget->hasSSE2(), DAG, dl);
4240 V[i] = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Op.getOperand(i));
4243 for (unsigned i = 0; i < 2; ++i) {
4244 switch ((NonZeros & (0x3 << i*2)) >> (i*2)) {
4247 V[i] = V[i*2]; // Must be a zero vector.
4250 V[i] = getMOVL(DAG, dl, VT, V[i*2+1], V[i*2]);
4253 V[i] = getMOVL(DAG, dl, VT, V[i*2], V[i*2+1]);
4256 V[i] = getUnpackl(DAG, dl, VT, V[i*2], V[i*2+1]);
4261 SmallVector<int, 8> MaskVec;
4262 bool Reverse = (NonZeros & 0x3) == 2;
4263 for (unsigned i = 0; i < 2; ++i)
4264 MaskVec.push_back(Reverse ? 1-i : i);
4265 Reverse = ((NonZeros & (0x3 << 2)) >> 2) == 2;
4266 for (unsigned i = 0; i < 2; ++i)
4267 MaskVec.push_back(Reverse ? 1-i+NumElems : i+NumElems);
4268 return DAG.getVectorShuffle(VT, dl, V[0], V[1], &MaskVec[0]);
4271 if (Values.size() > 1 && VT.getSizeInBits() == 128) {
4272 // Check for a build vector of consecutive loads.
4273 for (unsigned i = 0; i < NumElems; ++i)
4274 V[i] = Op.getOperand(i);
4276 // Check for elements which are consecutive loads.
4277 SDValue LD = EltsFromConsecutiveLoads(VT, V, dl, DAG);
4281 // For SSE 4.1, use insertps to put the high elements into the low element.
4282 if (getSubtarget()->hasSSE41()) {
4284 if (Op.getOperand(0).getOpcode() != ISD::UNDEF)
4285 Result = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Op.getOperand(0));
4287 Result = DAG.getUNDEF(VT);
4289 for (unsigned i = 1; i < NumElems; ++i) {
4290 if (Op.getOperand(i).getOpcode() == ISD::UNDEF) continue;
4291 Result = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, VT, Result,
4292 Op.getOperand(i), DAG.getIntPtrConstant(i));
4297 // Otherwise, expand into a number of unpckl*, start by extending each of
4298 // our (non-undef) elements to the full vector width with the element in the
4299 // bottom slot of the vector (which generates no code for SSE).
4300 for (unsigned i = 0; i < NumElems; ++i) {
4301 if (Op.getOperand(i).getOpcode() != ISD::UNDEF)
4302 V[i] = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Op.getOperand(i));
4304 V[i] = DAG.getUNDEF(VT);
4307 // Next, we iteratively mix elements, e.g. for v4f32:
4308 // Step 1: unpcklps 0, 2 ==> X: <?, ?, 2, 0>
4309 // : unpcklps 1, 3 ==> Y: <?, ?, 3, 1>
4310 // Step 2: unpcklps X, Y ==> <3, 2, 1, 0>
4311 unsigned EltStride = NumElems >> 1;
4312 while (EltStride != 0) {
4313 for (unsigned i = 0; i < EltStride; ++i) {
4314 // If V[i+EltStride] is undef and this is the first round of mixing,
4315 // then it is safe to just drop this shuffle: V[i] is already in the
4316 // right place, the one element (since it's the first round) being
4317 // inserted as undef can be dropped. This isn't safe for successive
4318 // rounds because they will permute elements within both vectors.
4319 if (V[i+EltStride].getOpcode() == ISD::UNDEF &&
4320 EltStride == NumElems/2)
4323 V[i] = getUnpackl(DAG, dl, VT, V[i], V[i + EltStride]);
4333 X86TargetLowering::LowerCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) const {
4334 // We support concatenate two MMX registers and place them in a MMX
4335 // register. This is better than doing a stack convert.
4336 DebugLoc dl = Op.getDebugLoc();
4337 EVT ResVT = Op.getValueType();
4338 assert(Op.getNumOperands() == 2);
4339 assert(ResVT == MVT::v2i64 || ResVT == MVT::v4i32 ||
4340 ResVT == MVT::v8i16 || ResVT == MVT::v16i8);
4342 SDValue InVec = DAG.getNode(ISD::BIT_CONVERT,dl, MVT::v1i64, Op.getOperand(0));
4343 SDValue VecOp = DAG.getNode(X86ISD::MOVQ2DQ, dl, MVT::v2i64, InVec);
4344 InVec = Op.getOperand(1);
4345 if (InVec.getOpcode() == ISD::SCALAR_TO_VECTOR) {
4346 unsigned NumElts = ResVT.getVectorNumElements();
4347 VecOp = DAG.getNode(ISD::BIT_CONVERT, dl, ResVT, VecOp);
4348 VecOp = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, ResVT, VecOp,
4349 InVec.getOperand(0), DAG.getIntPtrConstant(NumElts/2+1));
4351 InVec = DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v1i64, InVec);
4352 SDValue VecOp2 = DAG.getNode(X86ISD::MOVQ2DQ, dl, MVT::v2i64, InVec);
4353 Mask[0] = 0; Mask[1] = 2;
4354 VecOp = DAG.getVectorShuffle(MVT::v2i64, dl, VecOp, VecOp2, Mask);
4356 return DAG.getNode(ISD::BIT_CONVERT, dl, ResVT, VecOp);
4359 // v8i16 shuffles - Prefer shuffles in the following order:
4360 // 1. [all] pshuflw, pshufhw, optional move
4361 // 2. [ssse3] 1 x pshufb
4362 // 3. [ssse3] 2 x pshufb + 1 x por
4363 // 4. [all] mov + pshuflw + pshufhw + N x (pextrw + pinsrw)
4365 X86TargetLowering::LowerVECTOR_SHUFFLEv8i16(SDValue Op,
4366 SelectionDAG &DAG) const {
4367 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
4368 SDValue V1 = SVOp->getOperand(0);
4369 SDValue V2 = SVOp->getOperand(1);
4370 DebugLoc dl = SVOp->getDebugLoc();
4371 SmallVector<int, 8> MaskVals;
4373 // Determine if more than 1 of the words in each of the low and high quadwords
4374 // of the result come from the same quadword of one of the two inputs. Undef
4375 // mask values count as coming from any quadword, for better codegen.
4376 SmallVector<unsigned, 4> LoQuad(4);
4377 SmallVector<unsigned, 4> HiQuad(4);
4378 BitVector InputQuads(4);
4379 for (unsigned i = 0; i < 8; ++i) {
4380 SmallVectorImpl<unsigned> &Quad = i < 4 ? LoQuad : HiQuad;
4381 int EltIdx = SVOp->getMaskElt(i);
4382 MaskVals.push_back(EltIdx);
4391 InputQuads.set(EltIdx / 4);
4394 int BestLoQuad = -1;
4395 unsigned MaxQuad = 1;
4396 for (unsigned i = 0; i < 4; ++i) {
4397 if (LoQuad[i] > MaxQuad) {
4399 MaxQuad = LoQuad[i];
4403 int BestHiQuad = -1;
4405 for (unsigned i = 0; i < 4; ++i) {
4406 if (HiQuad[i] > MaxQuad) {
4408 MaxQuad = HiQuad[i];
4412 // For SSSE3, If all 8 words of the result come from only 1 quadword of each
4413 // of the two input vectors, shuffle them into one input vector so only a
4414 // single pshufb instruction is necessary. If There are more than 2 input
4415 // quads, disable the next transformation since it does not help SSSE3.
4416 bool V1Used = InputQuads[0] || InputQuads[1];
4417 bool V2Used = InputQuads[2] || InputQuads[3];
4418 if (Subtarget->hasSSSE3()) {
4419 if (InputQuads.count() == 2 && V1Used && V2Used) {
4420 BestLoQuad = InputQuads.find_first();
4421 BestHiQuad = InputQuads.find_next(BestLoQuad);
4423 if (InputQuads.count() > 2) {
4429 // If BestLoQuad or BestHiQuad are set, shuffle the quads together and update
4430 // the shuffle mask. If a quad is scored as -1, that means that it contains
4431 // words from all 4 input quadwords.
4433 if (BestLoQuad >= 0 || BestHiQuad >= 0) {
4434 SmallVector<int, 8> MaskV;
4435 MaskV.push_back(BestLoQuad < 0 ? 0 : BestLoQuad);
4436 MaskV.push_back(BestHiQuad < 0 ? 1 : BestHiQuad);
4437 NewV = DAG.getVectorShuffle(MVT::v2i64, dl,
4438 DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v2i64, V1),
4439 DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v2i64, V2), &MaskV[0]);
4440 NewV = DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v8i16, NewV);
4442 // Rewrite the MaskVals and assign NewV to V1 if NewV now contains all the
4443 // source words for the shuffle, to aid later transformations.
4444 bool AllWordsInNewV = true;
4445 bool InOrder[2] = { true, true };
4446 for (unsigned i = 0; i != 8; ++i) {
4447 int idx = MaskVals[i];
4449 InOrder[i/4] = false;
4450 if (idx < 0 || (idx/4) == BestLoQuad || (idx/4) == BestHiQuad)
4452 AllWordsInNewV = false;
4456 bool pshuflw = AllWordsInNewV, pshufhw = AllWordsInNewV;
4457 if (AllWordsInNewV) {
4458 for (int i = 0; i != 8; ++i) {
4459 int idx = MaskVals[i];
4462 idx = MaskVals[i] = (idx / 4) == BestLoQuad ? (idx & 3) : (idx & 3) + 4;
4463 if ((idx != i) && idx < 4)
4465 if ((idx != i) && idx > 3)
4474 // If we've eliminated the use of V2, and the new mask is a pshuflw or
4475 // pshufhw, that's as cheap as it gets. Return the new shuffle.
4476 if ((pshufhw && InOrder[0]) || (pshuflw && InOrder[1])) {
4477 unsigned Opc = pshufhw ? X86ISD::PSHUFHW : X86ISD::PSHUFLW;
4478 unsigned TargetMask = 0;
4479 NewV = DAG.getVectorShuffle(MVT::v8i16, dl, NewV,
4480 DAG.getUNDEF(MVT::v8i16), &MaskVals[0]);
4481 TargetMask = pshufhw ? X86::getShufflePSHUFHWImmediate(NewV.getNode()):
4482 X86::getShufflePSHUFLWImmediate(NewV.getNode());
4483 V1 = NewV.getOperand(0);
4484 return getTargetShuffleNode(Opc, dl, MVT::v8i16, V1, TargetMask, DAG);
4488 // If we have SSSE3, and all words of the result are from 1 input vector,
4489 // case 2 is generated, otherwise case 3 is generated. If no SSSE3
4490 // is present, fall back to case 4.
4491 if (Subtarget->hasSSSE3()) {
4492 SmallVector<SDValue,16> pshufbMask;
4494 // If we have elements from both input vectors, set the high bit of the
4495 // shuffle mask element to zero out elements that come from V2 in the V1
4496 // mask, and elements that come from V1 in the V2 mask, so that the two
4497 // results can be OR'd together.
4498 bool TwoInputs = V1Used && V2Used;
4499 for (unsigned i = 0; i != 8; ++i) {
4500 int EltIdx = MaskVals[i] * 2;
4501 if (TwoInputs && (EltIdx >= 16)) {
4502 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
4503 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
4506 pshufbMask.push_back(DAG.getConstant(EltIdx, MVT::i8));
4507 pshufbMask.push_back(DAG.getConstant(EltIdx+1, MVT::i8));
4509 V1 = DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v16i8, V1);
4510 V1 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V1,
4511 DAG.getNode(ISD::BUILD_VECTOR, dl,
4512 MVT::v16i8, &pshufbMask[0], 16));
4514 return DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v8i16, V1);
4516 // Calculate the shuffle mask for the second input, shuffle it, and
4517 // OR it with the first shuffled input.
4519 for (unsigned i = 0; i != 8; ++i) {
4520 int EltIdx = MaskVals[i] * 2;
4522 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
4523 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
4526 pshufbMask.push_back(DAG.getConstant(EltIdx - 16, MVT::i8));
4527 pshufbMask.push_back(DAG.getConstant(EltIdx - 15, MVT::i8));
4529 V2 = DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v16i8, V2);
4530 V2 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V2,
4531 DAG.getNode(ISD::BUILD_VECTOR, dl,
4532 MVT::v16i8, &pshufbMask[0], 16));
4533 V1 = DAG.getNode(ISD::OR, dl, MVT::v16i8, V1, V2);
4534 return DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v8i16, V1);
4537 // If BestLoQuad >= 0, generate a pshuflw to put the low elements in order,
4538 // and update MaskVals with new element order.
4539 BitVector InOrder(8);
4540 if (BestLoQuad >= 0) {
4541 SmallVector<int, 8> MaskV;
4542 for (int i = 0; i != 4; ++i) {
4543 int idx = MaskVals[i];
4545 MaskV.push_back(-1);
4547 } else if ((idx / 4) == BestLoQuad) {
4548 MaskV.push_back(idx & 3);
4551 MaskV.push_back(-1);
4554 for (unsigned i = 4; i != 8; ++i)
4556 NewV = DAG.getVectorShuffle(MVT::v8i16, dl, NewV, DAG.getUNDEF(MVT::v8i16),
4559 if (NewV.getOpcode() == ISD::VECTOR_SHUFFLE && Subtarget->hasSSSE3())
4560 NewV = getTargetShuffleNode(X86ISD::PSHUFLW, dl, MVT::v8i16,
4562 X86::getShufflePSHUFLWImmediate(NewV.getNode()),
4566 // If BestHi >= 0, generate a pshufhw to put the high elements in order,
4567 // and update MaskVals with the new element order.
4568 if (BestHiQuad >= 0) {
4569 SmallVector<int, 8> MaskV;
4570 for (unsigned i = 0; i != 4; ++i)
4572 for (unsigned i = 4; i != 8; ++i) {
4573 int idx = MaskVals[i];
4575 MaskV.push_back(-1);
4577 } else if ((idx / 4) == BestHiQuad) {
4578 MaskV.push_back((idx & 3) + 4);
4581 MaskV.push_back(-1);
4584 NewV = DAG.getVectorShuffle(MVT::v8i16, dl, NewV, DAG.getUNDEF(MVT::v8i16),
4587 if (NewV.getOpcode() == ISD::VECTOR_SHUFFLE && Subtarget->hasSSSE3())
4588 NewV = getTargetShuffleNode(X86ISD::PSHUFHW, dl, MVT::v8i16,
4590 X86::getShufflePSHUFHWImmediate(NewV.getNode()),
4594 // In case BestHi & BestLo were both -1, which means each quadword has a word
4595 // from each of the four input quadwords, calculate the InOrder bitvector now
4596 // before falling through to the insert/extract cleanup.
4597 if (BestLoQuad == -1 && BestHiQuad == -1) {
4599 for (int i = 0; i != 8; ++i)
4600 if (MaskVals[i] < 0 || MaskVals[i] == i)
4604 // The other elements are put in the right place using pextrw and pinsrw.
4605 for (unsigned i = 0; i != 8; ++i) {
4608 int EltIdx = MaskVals[i];
4611 SDValue ExtOp = (EltIdx < 8)
4612 ? DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, V1,
4613 DAG.getIntPtrConstant(EltIdx))
4614 : DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, V2,
4615 DAG.getIntPtrConstant(EltIdx - 8));
4616 NewV = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, NewV, ExtOp,
4617 DAG.getIntPtrConstant(i));
4622 // v16i8 shuffles - Prefer shuffles in the following order:
4623 // 1. [ssse3] 1 x pshufb
4624 // 2. [ssse3] 2 x pshufb + 1 x por
4625 // 3. [all] v8i16 shuffle + N x pextrw + rotate + pinsrw
4627 SDValue LowerVECTOR_SHUFFLEv16i8(ShuffleVectorSDNode *SVOp,
4629 const X86TargetLowering &TLI) {
4630 SDValue V1 = SVOp->getOperand(0);
4631 SDValue V2 = SVOp->getOperand(1);
4632 DebugLoc dl = SVOp->getDebugLoc();
4633 SmallVector<int, 16> MaskVals;
4634 SVOp->getMask(MaskVals);
4636 // If we have SSSE3, case 1 is generated when all result bytes come from
4637 // one of the inputs. Otherwise, case 2 is generated. If no SSSE3 is
4638 // present, fall back to case 3.
4639 // FIXME: kill V2Only once shuffles are canonizalized by getNode.
4642 for (unsigned i = 0; i < 16; ++i) {
4643 int EltIdx = MaskVals[i];
4652 // If SSSE3, use 1 pshufb instruction per vector with elements in the result.
4653 if (TLI.getSubtarget()->hasSSSE3()) {
4654 SmallVector<SDValue,16> pshufbMask;
4656 // If all result elements are from one input vector, then only translate
4657 // undef mask values to 0x80 (zero out result) in the pshufb mask.
4659 // Otherwise, we have elements from both input vectors, and must zero out
4660 // elements that come from V2 in the first mask, and V1 in the second mask
4661 // so that we can OR them together.
4662 bool TwoInputs = !(V1Only || V2Only);
4663 for (unsigned i = 0; i != 16; ++i) {
4664 int EltIdx = MaskVals[i];
4665 if (EltIdx < 0 || (TwoInputs && EltIdx >= 16)) {
4666 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
4669 pshufbMask.push_back(DAG.getConstant(EltIdx, MVT::i8));
4671 // If all the elements are from V2, assign it to V1 and return after
4672 // building the first pshufb.
4675 V1 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V1,
4676 DAG.getNode(ISD::BUILD_VECTOR, dl,
4677 MVT::v16i8, &pshufbMask[0], 16));
4681 // Calculate the shuffle mask for the second input, shuffle it, and
4682 // OR it with the first shuffled input.
4684 for (unsigned i = 0; i != 16; ++i) {
4685 int EltIdx = MaskVals[i];
4687 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
4690 pshufbMask.push_back(DAG.getConstant(EltIdx - 16, MVT::i8));
4692 V2 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V2,
4693 DAG.getNode(ISD::BUILD_VECTOR, dl,
4694 MVT::v16i8, &pshufbMask[0], 16));
4695 return DAG.getNode(ISD::OR, dl, MVT::v16i8, V1, V2);
4698 // No SSSE3 - Calculate in place words and then fix all out of place words
4699 // With 0-16 extracts & inserts. Worst case is 16 bytes out of order from
4700 // the 16 different words that comprise the two doublequadword input vectors.
4701 V1 = DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v8i16, V1);
4702 V2 = DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v8i16, V2);
4703 SDValue NewV = V2Only ? V2 : V1;
4704 for (int i = 0; i != 8; ++i) {
4705 int Elt0 = MaskVals[i*2];
4706 int Elt1 = MaskVals[i*2+1];
4708 // This word of the result is all undef, skip it.
4709 if (Elt0 < 0 && Elt1 < 0)
4712 // This word of the result is already in the correct place, skip it.
4713 if (V1Only && (Elt0 == i*2) && (Elt1 == i*2+1))
4715 if (V2Only && (Elt0 == i*2+16) && (Elt1 == i*2+17))
4718 SDValue Elt0Src = Elt0 < 16 ? V1 : V2;
4719 SDValue Elt1Src = Elt1 < 16 ? V1 : V2;
4722 // If Elt0 and Elt1 are defined, are consecutive, and can be load
4723 // using a single extract together, load it and store it.
4724 if ((Elt0 >= 0) && ((Elt0 + 1) == Elt1) && ((Elt0 & 1) == 0)) {
4725 InsElt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, Elt1Src,
4726 DAG.getIntPtrConstant(Elt1 / 2));
4727 NewV = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, NewV, InsElt,
4728 DAG.getIntPtrConstant(i));
4732 // If Elt1 is defined, extract it from the appropriate source. If the
4733 // source byte is not also odd, shift the extracted word left 8 bits
4734 // otherwise clear the bottom 8 bits if we need to do an or.
4736 InsElt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, Elt1Src,
4737 DAG.getIntPtrConstant(Elt1 / 2));
4738 if ((Elt1 & 1) == 0)
4739 InsElt = DAG.getNode(ISD::SHL, dl, MVT::i16, InsElt,
4740 DAG.getConstant(8, TLI.getShiftAmountTy()));
4742 InsElt = DAG.getNode(ISD::AND, dl, MVT::i16, InsElt,
4743 DAG.getConstant(0xFF00, MVT::i16));
4745 // If Elt0 is defined, extract it from the appropriate source. If the
4746 // source byte is not also even, shift the extracted word right 8 bits. If
4747 // Elt1 was also defined, OR the extracted values together before
4748 // inserting them in the result.
4750 SDValue InsElt0 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16,
4751 Elt0Src, DAG.getIntPtrConstant(Elt0 / 2));
4752 if ((Elt0 & 1) != 0)
4753 InsElt0 = DAG.getNode(ISD::SRL, dl, MVT::i16, InsElt0,
4754 DAG.getConstant(8, TLI.getShiftAmountTy()));
4756 InsElt0 = DAG.getNode(ISD::AND, dl, MVT::i16, InsElt0,
4757 DAG.getConstant(0x00FF, MVT::i16));
4758 InsElt = Elt1 >= 0 ? DAG.getNode(ISD::OR, dl, MVT::i16, InsElt, InsElt0)
4761 NewV = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, NewV, InsElt,
4762 DAG.getIntPtrConstant(i));
4764 return DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v16i8, NewV);
4767 /// RewriteAsNarrowerShuffle - Try rewriting v8i16 and v16i8 shuffles as 4 wide
4768 /// ones, or rewriting v4i32 / v2i32 as 2 wide ones if possible. This can be
4769 /// done when every pair / quad of shuffle mask elements point to elements in
4770 /// the right sequence. e.g.
4771 /// vector_shuffle <>, <>, < 3, 4, | 10, 11, | 0, 1, | 14, 15>
4773 SDValue RewriteAsNarrowerShuffle(ShuffleVectorSDNode *SVOp,
4775 const TargetLowering &TLI, DebugLoc dl) {
4776 EVT VT = SVOp->getValueType(0);
4777 SDValue V1 = SVOp->getOperand(0);
4778 SDValue V2 = SVOp->getOperand(1);
4779 unsigned NumElems = VT.getVectorNumElements();
4780 unsigned NewWidth = (NumElems == 4) ? 2 : 4;
4781 EVT MaskVT = (NewWidth == 4) ? MVT::v4i16 : MVT::v2i32;
4783 switch (VT.getSimpleVT().SimpleTy) {
4784 default: assert(false && "Unexpected!");
4785 case MVT::v4f32: NewVT = MVT::v2f64; break;
4786 case MVT::v4i32: NewVT = MVT::v2i64; break;
4787 case MVT::v8i16: NewVT = MVT::v4i32; break;
4788 case MVT::v16i8: NewVT = MVT::v4i32; break;
4791 if (NewWidth == 2) {
4797 int Scale = NumElems / NewWidth;
4798 SmallVector<int, 8> MaskVec;
4799 for (unsigned i = 0; i < NumElems; i += Scale) {
4801 for (int j = 0; j < Scale; ++j) {
4802 int EltIdx = SVOp->getMaskElt(i+j);
4806 StartIdx = EltIdx - (EltIdx % Scale);
4807 if (EltIdx != StartIdx + j)
4811 MaskVec.push_back(-1);
4813 MaskVec.push_back(StartIdx / Scale);
4816 V1 = DAG.getNode(ISD::BIT_CONVERT, dl, NewVT, V1);
4817 V2 = DAG.getNode(ISD::BIT_CONVERT, dl, NewVT, V2);
4818 return DAG.getVectorShuffle(NewVT, dl, V1, V2, &MaskVec[0]);
4821 /// getVZextMovL - Return a zero-extending vector move low node.
4823 static SDValue getVZextMovL(EVT VT, EVT OpVT,
4824 SDValue SrcOp, SelectionDAG &DAG,
4825 const X86Subtarget *Subtarget, DebugLoc dl) {
4826 if (VT == MVT::v2f64 || VT == MVT::v4f32) {
4827 LoadSDNode *LD = NULL;
4828 if (!isScalarLoadToVector(SrcOp.getNode(), &LD))
4829 LD = dyn_cast<LoadSDNode>(SrcOp);
4831 // movssrr and movsdrr do not clear top bits. Try to use movd, movq
4833 MVT ExtVT = (OpVT == MVT::v2f64) ? MVT::i64 : MVT::i32;
4834 if ((ExtVT.SimpleTy != MVT::i64 || Subtarget->is64Bit()) &&
4835 SrcOp.getOpcode() == ISD::SCALAR_TO_VECTOR &&
4836 SrcOp.getOperand(0).getOpcode() == ISD::BIT_CONVERT &&
4837 SrcOp.getOperand(0).getOperand(0).getValueType() == ExtVT) {
4839 OpVT = (OpVT == MVT::v2f64) ? MVT::v2i64 : MVT::v4i32;
4840 return DAG.getNode(ISD::BIT_CONVERT, dl, VT,
4841 DAG.getNode(X86ISD::VZEXT_MOVL, dl, OpVT,
4842 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
4850 return DAG.getNode(ISD::BIT_CONVERT, dl, VT,
4851 DAG.getNode(X86ISD::VZEXT_MOVL, dl, OpVT,
4852 DAG.getNode(ISD::BIT_CONVERT, dl,
4856 /// LowerVECTOR_SHUFFLE_4wide - Handle all 4 wide cases with a number of
4859 LowerVECTOR_SHUFFLE_4wide(ShuffleVectorSDNode *SVOp, SelectionDAG &DAG) {
4860 SDValue V1 = SVOp->getOperand(0);
4861 SDValue V2 = SVOp->getOperand(1);
4862 DebugLoc dl = SVOp->getDebugLoc();
4863 EVT VT = SVOp->getValueType(0);
4865 SmallVector<std::pair<int, int>, 8> Locs;
4867 SmallVector<int, 8> Mask1(4U, -1);
4868 SmallVector<int, 8> PermMask;
4869 SVOp->getMask(PermMask);
4873 for (unsigned i = 0; i != 4; ++i) {
4874 int Idx = PermMask[i];
4876 Locs[i] = std::make_pair(-1, -1);
4878 assert(Idx < 8 && "Invalid VECTOR_SHUFFLE index!");
4880 Locs[i] = std::make_pair(0, NumLo);
4884 Locs[i] = std::make_pair(1, NumHi);
4886 Mask1[2+NumHi] = Idx;
4892 if (NumLo <= 2 && NumHi <= 2) {
4893 // If no more than two elements come from either vector. This can be
4894 // implemented with two shuffles. First shuffle gather the elements.
4895 // The second shuffle, which takes the first shuffle as both of its
4896 // vector operands, put the elements into the right order.
4897 V1 = DAG.getVectorShuffle(VT, dl, V1, V2, &Mask1[0]);
4899 SmallVector<int, 8> Mask2(4U, -1);
4901 for (unsigned i = 0; i != 4; ++i) {
4902 if (Locs[i].first == -1)
4905 unsigned Idx = (i < 2) ? 0 : 4;
4906 Idx += Locs[i].first * 2 + Locs[i].second;
4911 return DAG.getVectorShuffle(VT, dl, V1, V1, &Mask2[0]);
4912 } else if (NumLo == 3 || NumHi == 3) {
4913 // Otherwise, we must have three elements from one vector, call it X, and
4914 // one element from the other, call it Y. First, use a shufps to build an
4915 // intermediate vector with the one element from Y and the element from X
4916 // that will be in the same half in the final destination (the indexes don't
4917 // matter). Then, use a shufps to build the final vector, taking the half
4918 // containing the element from Y from the intermediate, and the other half
4921 // Normalize it so the 3 elements come from V1.
4922 CommuteVectorShuffleMask(PermMask, VT);
4926 // Find the element from V2.
4928 for (HiIndex = 0; HiIndex < 3; ++HiIndex) {
4929 int Val = PermMask[HiIndex];
4936 Mask1[0] = PermMask[HiIndex];
4938 Mask1[2] = PermMask[HiIndex^1];
4940 V2 = DAG.getVectorShuffle(VT, dl, V1, V2, &Mask1[0]);
4943 Mask1[0] = PermMask[0];
4944 Mask1[1] = PermMask[1];
4945 Mask1[2] = HiIndex & 1 ? 6 : 4;
4946 Mask1[3] = HiIndex & 1 ? 4 : 6;
4947 return DAG.getVectorShuffle(VT, dl, V1, V2, &Mask1[0]);
4949 Mask1[0] = HiIndex & 1 ? 2 : 0;
4950 Mask1[1] = HiIndex & 1 ? 0 : 2;
4951 Mask1[2] = PermMask[2];
4952 Mask1[3] = PermMask[3];
4957 return DAG.getVectorShuffle(VT, dl, V2, V1, &Mask1[0]);
4961 // Break it into (shuffle shuffle_hi, shuffle_lo).
4963 SmallVector<int,8> LoMask(4U, -1);
4964 SmallVector<int,8> HiMask(4U, -1);
4966 SmallVector<int,8> *MaskPtr = &LoMask;
4967 unsigned MaskIdx = 0;
4970 for (unsigned i = 0; i != 4; ++i) {
4977 int Idx = PermMask[i];
4979 Locs[i] = std::make_pair(-1, -1);
4980 } else if (Idx < 4) {
4981 Locs[i] = std::make_pair(MaskIdx, LoIdx);
4982 (*MaskPtr)[LoIdx] = Idx;
4985 Locs[i] = std::make_pair(MaskIdx, HiIdx);
4986 (*MaskPtr)[HiIdx] = Idx;
4991 SDValue LoShuffle = DAG.getVectorShuffle(VT, dl, V1, V2, &LoMask[0]);
4992 SDValue HiShuffle = DAG.getVectorShuffle(VT, dl, V1, V2, &HiMask[0]);
4993 SmallVector<int, 8> MaskOps;
4994 for (unsigned i = 0; i != 4; ++i) {
4995 if (Locs[i].first == -1) {
4996 MaskOps.push_back(-1);
4998 unsigned Idx = Locs[i].first * 4 + Locs[i].second;
4999 MaskOps.push_back(Idx);
5002 return DAG.getVectorShuffle(VT, dl, LoShuffle, HiShuffle, &MaskOps[0]);
5006 X86TargetLowering::LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) const {
5007 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
5008 SDValue V1 = Op.getOperand(0);
5009 SDValue V2 = Op.getOperand(1);
5010 EVT VT = Op.getValueType();
5011 DebugLoc dl = Op.getDebugLoc();
5012 unsigned NumElems = VT.getVectorNumElements();
5013 bool isMMX = VT.getSizeInBits() == 64;
5014 bool V1IsUndef = V1.getOpcode() == ISD::UNDEF;
5015 bool V2IsUndef = V2.getOpcode() == ISD::UNDEF;
5016 bool V1IsSplat = false;
5017 bool V2IsSplat = false;
5018 bool HasSSE2 = Subtarget->hasSSE2() || Subtarget->hasAVX();
5019 MachineFunction &MF = DAG.getMachineFunction();
5020 bool OptForSize = MF.getFunction()->hasFnAttr(Attribute::OptimizeForSize);
5022 if (isZeroShuffle(SVOp))
5023 return getZeroVector(VT, Subtarget->hasSSE2(), DAG, dl);
5025 // Promote splats to v4f32.
5026 if (SVOp->isSplat()) {
5027 if (isMMX || NumElems < 4)
5029 return PromoteSplat(SVOp, DAG);
5032 // If the shuffle can be profitably rewritten as a narrower shuffle, then
5034 if (VT == MVT::v8i16 || VT == MVT::v16i8) {
5035 SDValue NewOp = RewriteAsNarrowerShuffle(SVOp, DAG, *this, dl);
5036 if (NewOp.getNode())
5037 return DAG.getNode(ISD::BIT_CONVERT, dl, VT,
5038 LowerVECTOR_SHUFFLE(NewOp, DAG));
5039 } else if ((VT == MVT::v4i32 || (VT == MVT::v4f32 && Subtarget->hasSSE2()))) {
5040 // FIXME: Figure out a cleaner way to do this.
5041 // Try to make use of movq to zero out the top part.
5042 if (ISD::isBuildVectorAllZeros(V2.getNode())) {
5043 SDValue NewOp = RewriteAsNarrowerShuffle(SVOp, DAG, *this, dl);
5044 if (NewOp.getNode()) {
5045 if (isCommutedMOVL(cast<ShuffleVectorSDNode>(NewOp), true, false))
5046 return getVZextMovL(VT, NewOp.getValueType(), NewOp.getOperand(0),
5047 DAG, Subtarget, dl);
5049 } else if (ISD::isBuildVectorAllZeros(V1.getNode())) {
5050 SDValue NewOp = RewriteAsNarrowerShuffle(SVOp, DAG, *this, dl);
5051 if (NewOp.getNode() && X86::isMOVLMask(cast<ShuffleVectorSDNode>(NewOp)))
5052 return getVZextMovL(VT, NewOp.getValueType(), NewOp.getOperand(1),
5053 DAG, Subtarget, dl);
5057 if (X86::isPSHUFDMask(SVOp)) {
5058 // The actual implementation will match the mask in the if above and then
5059 // during isel it can match several different instructions, not only pshufd
5060 // as its name says, sad but true, emulate the behavior for now...
5061 if (X86::isMOVDDUPMask(SVOp) && ((VT == MVT::v4f32 || VT == MVT::v2i64)))
5062 return getTargetShuffleNode(X86ISD::MOVLHPS, dl, VT, V1, V1, DAG);
5064 if (OptForSize && HasSSE2 && X86::isUNPCKL_v_undef_Mask(SVOp) &&
5066 return getTargetShuffleNode(X86ISD::PUNPCKLDQ, dl, VT, V1, V1, DAG);
5068 unsigned TargetMask = X86::getShuffleSHUFImmediate(SVOp);
5070 if (HasSSE2 && (VT == MVT::v4f32 || VT == MVT::v4i32))
5071 return getTargetShuffleNode(X86ISD::PSHUFD, dl, VT, V1, TargetMask, DAG);
5073 if (HasSSE2 && (VT == MVT::v2i64 || VT == MVT::v2f64))
5074 return getTargetShuffleNode(X86ISD::SHUFPD, dl, VT, V1, V1,
5077 if (VT == MVT::v4f32)
5078 return getTargetShuffleNode(X86ISD::SHUFPS, dl, VT, V1, V1,
5082 // Check if this can be converted into a logical shift.
5083 bool isLeft = false;
5086 bool isShift = getSubtarget()->hasSSE2() &&
5087 isVectorShift(SVOp, DAG, isLeft, ShVal, ShAmt);
5088 if (isShift && ShVal.hasOneUse()) {
5089 // If the shifted value has multiple uses, it may be cheaper to use
5090 // v_set0 + movlhps or movhlps, etc.
5091 EVT EltVT = VT.getVectorElementType();
5092 ShAmt *= EltVT.getSizeInBits();
5093 return getVShift(isLeft, VT, ShVal, ShAmt, DAG, *this, dl);
5096 if (X86::isMOVLMask(SVOp)) {
5099 if (ISD::isBuildVectorAllZeros(V1.getNode()))
5100 return getVZextMovL(VT, VT, V2, DAG, Subtarget, dl);
5105 // FIXME: fold these into legal mask.
5106 if (!isMMX && (X86::isMOVSHDUPMask(SVOp) ||
5107 X86::isMOVSLDUPMask(SVOp) ||
5108 X86::isMOVHLPSMask(SVOp) ||
5109 X86::isMOVLHPSMask(SVOp) ||
5110 X86::isMOVLPMask(SVOp)))
5113 if (ShouldXformToMOVHLPS(SVOp) ||
5114 ShouldXformToMOVLP(V1.getNode(), V2.getNode(), SVOp))
5115 return CommuteVectorShuffle(SVOp, DAG);
5118 // No better options. Use a vshl / vsrl.
5119 EVT EltVT = VT.getVectorElementType();
5120 ShAmt *= EltVT.getSizeInBits();
5121 return getVShift(isLeft, VT, ShVal, ShAmt, DAG, *this, dl);
5124 bool Commuted = false;
5125 // FIXME: This should also accept a bitcast of a splat? Be careful, not
5126 // 1,1,1,1 -> v8i16 though.
5127 V1IsSplat = isSplatVector(V1.getNode());
5128 V2IsSplat = isSplatVector(V2.getNode());
5130 // Canonicalize the splat or undef, if present, to be on the RHS.
5131 if ((V1IsSplat || V1IsUndef) && !(V2IsSplat || V2IsUndef)) {
5132 Op = CommuteVectorShuffle(SVOp, DAG);
5133 SVOp = cast<ShuffleVectorSDNode>(Op);
5134 V1 = SVOp->getOperand(0);
5135 V2 = SVOp->getOperand(1);
5136 std::swap(V1IsSplat, V2IsSplat);
5137 std::swap(V1IsUndef, V2IsUndef);
5141 if (isCommutedMOVL(SVOp, V2IsSplat, V2IsUndef)) {
5142 // Shuffling low element of v1 into undef, just return v1.
5145 // If V2 is a splat, the mask may be malformed such as <4,3,3,3>, which
5146 // the instruction selector will not match, so get a canonical MOVL with
5147 // swapped operands to undo the commute.
5148 return getMOVL(DAG, dl, VT, V2, V1);
5151 if (X86::isUNPCKL_v_undef_Mask(SVOp) ||
5152 X86::isUNPCKH_v_undef_Mask(SVOp) ||
5153 X86::isUNPCKLMask(SVOp) ||
5154 X86::isUNPCKHMask(SVOp))
5158 // Normalize mask so all entries that point to V2 points to its first
5159 // element then try to match unpck{h|l} again. If match, return a
5160 // new vector_shuffle with the corrected mask.
5161 SDValue NewMask = NormalizeMask(SVOp, DAG);
5162 ShuffleVectorSDNode *NSVOp = cast<ShuffleVectorSDNode>(NewMask);
5163 if (NSVOp != SVOp) {
5164 if (X86::isUNPCKLMask(NSVOp, true)) {
5166 } else if (X86::isUNPCKHMask(NSVOp, true)) {
5173 // Commute is back and try unpck* again.
5174 // FIXME: this seems wrong.
5175 SDValue NewOp = CommuteVectorShuffle(SVOp, DAG);
5176 ShuffleVectorSDNode *NewSVOp = cast<ShuffleVectorSDNode>(NewOp);
5177 if (X86::isUNPCKL_v_undef_Mask(NewSVOp) ||
5178 X86::isUNPCKH_v_undef_Mask(NewSVOp) ||
5179 X86::isUNPCKLMask(NewSVOp) ||
5180 X86::isUNPCKHMask(NewSVOp))
5184 // FIXME: for mmx, bitcast v2i32 to v4i16 for shuffle.
5186 // Normalize the node to match x86 shuffle ops if needed
5187 if (!isMMX && V2.getOpcode() != ISD::UNDEF && isCommutedSHUFP(SVOp))
5188 return CommuteVectorShuffle(SVOp, DAG);
5190 // Check for legal shuffle and return?
5191 SmallVector<int, 16> PermMask;
5192 SVOp->getMask(PermMask);
5193 if (isShuffleMaskLegal(PermMask, VT))
5196 // Handle v8i16 specifically since SSE can do byte extraction and insertion.
5197 if (VT == MVT::v8i16) {
5198 SDValue NewOp = LowerVECTOR_SHUFFLEv8i16(Op, DAG);
5199 if (NewOp.getNode())
5203 if (VT == MVT::v16i8) {
5204 SDValue NewOp = LowerVECTOR_SHUFFLEv16i8(SVOp, DAG, *this);
5205 if (NewOp.getNode())
5209 // Handle all 4 wide cases with a number of shuffles except for MMX.
5210 if (NumElems == 4 && !isMMX)
5211 return LowerVECTOR_SHUFFLE_4wide(SVOp, DAG);
5217 X86TargetLowering::LowerEXTRACT_VECTOR_ELT_SSE4(SDValue Op,
5218 SelectionDAG &DAG) const {
5219 EVT VT = Op.getValueType();
5220 DebugLoc dl = Op.getDebugLoc();
5221 if (VT.getSizeInBits() == 8) {
5222 SDValue Extract = DAG.getNode(X86ISD::PEXTRB, dl, MVT::i32,
5223 Op.getOperand(0), Op.getOperand(1));
5224 SDValue Assert = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Extract,
5225 DAG.getValueType(VT));
5226 return DAG.getNode(ISD::TRUNCATE, dl, VT, Assert);
5227 } else if (VT.getSizeInBits() == 16) {
5228 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
5229 // If Idx is 0, it's cheaper to do a move instead of a pextrw.
5231 return DAG.getNode(ISD::TRUNCATE, dl, MVT::i16,
5232 DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32,
5233 DAG.getNode(ISD::BIT_CONVERT, dl,
5237 SDValue Extract = DAG.getNode(X86ISD::PEXTRW, dl, MVT::i32,
5238 Op.getOperand(0), Op.getOperand(1));
5239 SDValue Assert = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Extract,
5240 DAG.getValueType(VT));
5241 return DAG.getNode(ISD::TRUNCATE, dl, VT, Assert);
5242 } else if (VT == MVT::f32) {
5243 // EXTRACTPS outputs to a GPR32 register which will require a movd to copy
5244 // the result back to FR32 register. It's only worth matching if the
5245 // result has a single use which is a store or a bitcast to i32. And in
5246 // the case of a store, it's not worth it if the index is a constant 0,
5247 // because a MOVSSmr can be used instead, which is smaller and faster.
5248 if (!Op.hasOneUse())
5250 SDNode *User = *Op.getNode()->use_begin();
5251 if ((User->getOpcode() != ISD::STORE ||
5252 (isa<ConstantSDNode>(Op.getOperand(1)) &&
5253 cast<ConstantSDNode>(Op.getOperand(1))->isNullValue())) &&
5254 (User->getOpcode() != ISD::BIT_CONVERT ||
5255 User->getValueType(0) != MVT::i32))
5257 SDValue Extract = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32,
5258 DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v4i32,
5261 return DAG.getNode(ISD::BIT_CONVERT, dl, MVT::f32, Extract);
5262 } else if (VT == MVT::i32) {
5263 // ExtractPS works with constant index.
5264 if (isa<ConstantSDNode>(Op.getOperand(1)))
5272 X86TargetLowering::LowerEXTRACT_VECTOR_ELT(SDValue Op,
5273 SelectionDAG &DAG) const {
5274 if (!isa<ConstantSDNode>(Op.getOperand(1)))
5277 if (Subtarget->hasSSE41()) {
5278 SDValue Res = LowerEXTRACT_VECTOR_ELT_SSE4(Op, DAG);
5283 EVT VT = Op.getValueType();
5284 DebugLoc dl = Op.getDebugLoc();
5285 // TODO: handle v16i8.
5286 if (VT.getSizeInBits() == 16) {
5287 SDValue Vec = Op.getOperand(0);
5288 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
5290 return DAG.getNode(ISD::TRUNCATE, dl, MVT::i16,
5291 DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32,
5292 DAG.getNode(ISD::BIT_CONVERT, dl,
5295 // Transform it so it match pextrw which produces a 32-bit result.
5296 EVT EltVT = MVT::i32;
5297 SDValue Extract = DAG.getNode(X86ISD::PEXTRW, dl, EltVT,
5298 Op.getOperand(0), Op.getOperand(1));
5299 SDValue Assert = DAG.getNode(ISD::AssertZext, dl, EltVT, Extract,
5300 DAG.getValueType(VT));
5301 return DAG.getNode(ISD::TRUNCATE, dl, VT, Assert);
5302 } else if (VT.getSizeInBits() == 32) {
5303 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
5307 // SHUFPS the element to the lowest double word, then movss.
5308 int Mask[4] = { Idx, -1, -1, -1 };
5309 EVT VVT = Op.getOperand(0).getValueType();
5310 SDValue Vec = DAG.getVectorShuffle(VVT, dl, Op.getOperand(0),
5311 DAG.getUNDEF(VVT), Mask);
5312 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, VT, Vec,
5313 DAG.getIntPtrConstant(0));
5314 } else if (VT.getSizeInBits() == 64) {
5315 // FIXME: .td only matches this for <2 x f64>, not <2 x i64> on 32b
5316 // FIXME: seems like this should be unnecessary if mov{h,l}pd were taught
5317 // to match extract_elt for f64.
5318 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
5322 // UNPCKHPD the element to the lowest double word, then movsd.
5323 // Note if the lower 64 bits of the result of the UNPCKHPD is then stored
5324 // to a f64mem, the whole operation is folded into a single MOVHPDmr.
5325 int Mask[2] = { 1, -1 };
5326 EVT VVT = Op.getOperand(0).getValueType();
5327 SDValue Vec = DAG.getVectorShuffle(VVT, dl, Op.getOperand(0),
5328 DAG.getUNDEF(VVT), Mask);
5329 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, VT, Vec,
5330 DAG.getIntPtrConstant(0));
5337 X86TargetLowering::LowerINSERT_VECTOR_ELT_SSE4(SDValue Op,
5338 SelectionDAG &DAG) const {
5339 EVT VT = Op.getValueType();
5340 EVT EltVT = VT.getVectorElementType();
5341 DebugLoc dl = Op.getDebugLoc();
5343 SDValue N0 = Op.getOperand(0);
5344 SDValue N1 = Op.getOperand(1);
5345 SDValue N2 = Op.getOperand(2);
5347 if ((EltVT.getSizeInBits() == 8 || EltVT.getSizeInBits() == 16) &&
5348 isa<ConstantSDNode>(N2)) {
5350 if (VT == MVT::v8i16)
5351 Opc = X86ISD::PINSRW;
5352 else if (VT == MVT::v4i16)
5353 Opc = X86ISD::MMX_PINSRW;
5354 else if (VT == MVT::v16i8)
5355 Opc = X86ISD::PINSRB;
5357 Opc = X86ISD::PINSRB;
5359 // Transform it so it match pinsr{b,w} which expects a GR32 as its second
5361 if (N1.getValueType() != MVT::i32)
5362 N1 = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, N1);
5363 if (N2.getValueType() != MVT::i32)
5364 N2 = DAG.getIntPtrConstant(cast<ConstantSDNode>(N2)->getZExtValue());
5365 return DAG.getNode(Opc, dl, VT, N0, N1, N2);
5366 } else if (EltVT == MVT::f32 && isa<ConstantSDNode>(N2)) {
5367 // Bits [7:6] of the constant are the source select. This will always be
5368 // zero here. The DAG Combiner may combine an extract_elt index into these
5369 // bits. For example (insert (extract, 3), 2) could be matched by putting
5370 // the '3' into bits [7:6] of X86ISD::INSERTPS.
5371 // Bits [5:4] of the constant are the destination select. This is the
5372 // value of the incoming immediate.
5373 // Bits [3:0] of the constant are the zero mask. The DAG Combiner may
5374 // combine either bitwise AND or insert of float 0.0 to set these bits.
5375 N2 = DAG.getIntPtrConstant(cast<ConstantSDNode>(N2)->getZExtValue() << 4);
5376 // Create this as a scalar to vector..
5377 N1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4f32, N1);
5378 return DAG.getNode(X86ISD::INSERTPS, dl, VT, N0, N1, N2);
5379 } else if (EltVT == MVT::i32 && isa<ConstantSDNode>(N2)) {
5380 // PINSR* works with constant index.
5387 X86TargetLowering::LowerINSERT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) const {
5388 EVT VT = Op.getValueType();
5389 EVT EltVT = VT.getVectorElementType();
5391 if (Subtarget->hasSSE41())
5392 return LowerINSERT_VECTOR_ELT_SSE4(Op, DAG);
5394 if (EltVT == MVT::i8)
5397 DebugLoc dl = Op.getDebugLoc();
5398 SDValue N0 = Op.getOperand(0);
5399 SDValue N1 = Op.getOperand(1);
5400 SDValue N2 = Op.getOperand(2);
5402 if (EltVT.getSizeInBits() == 16 && isa<ConstantSDNode>(N2)) {
5403 // Transform it so it match pinsrw which expects a 16-bit value in a GR32
5404 // as its second argument.
5405 if (N1.getValueType() != MVT::i32)
5406 N1 = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, N1);
5407 if (N2.getValueType() != MVT::i32)
5408 N2 = DAG.getIntPtrConstant(cast<ConstantSDNode>(N2)->getZExtValue());
5409 return DAG.getNode(VT == MVT::v8i16 ? X86ISD::PINSRW : X86ISD::MMX_PINSRW,
5410 dl, VT, N0, N1, N2);
5416 X86TargetLowering::LowerSCALAR_TO_VECTOR(SDValue Op, SelectionDAG &DAG) const {
5417 DebugLoc dl = Op.getDebugLoc();
5419 if (Op.getValueType() == MVT::v1i64 &&
5420 Op.getOperand(0).getValueType() == MVT::i64)
5421 return DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v1i64, Op.getOperand(0));
5423 SDValue AnyExt = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, Op.getOperand(0));
5424 EVT VT = MVT::v2i32;
5425 switch (Op.getValueType().getSimpleVT().SimpleTy) {
5432 return DAG.getNode(ISD::BIT_CONVERT, dl, Op.getValueType(),
5433 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, AnyExt));
5436 // ConstantPool, JumpTable, GlobalAddress, and ExternalSymbol are lowered as
5437 // their target countpart wrapped in the X86ISD::Wrapper node. Suppose N is
5438 // one of the above mentioned nodes. It has to be wrapped because otherwise
5439 // Select(N) returns N. So the raw TargetGlobalAddress nodes, etc. can only
5440 // be used to form addressing mode. These wrapped nodes will be selected
5443 X86TargetLowering::LowerConstantPool(SDValue Op, SelectionDAG &DAG) const {
5444 ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
5446 // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
5448 unsigned char OpFlag = 0;
5449 unsigned WrapperKind = X86ISD::Wrapper;
5450 CodeModel::Model M = getTargetMachine().getCodeModel();
5452 if (Subtarget->isPICStyleRIPRel() &&
5453 (M == CodeModel::Small || M == CodeModel::Kernel))
5454 WrapperKind = X86ISD::WrapperRIP;
5455 else if (Subtarget->isPICStyleGOT())
5456 OpFlag = X86II::MO_GOTOFF;
5457 else if (Subtarget->isPICStyleStubPIC())
5458 OpFlag = X86II::MO_PIC_BASE_OFFSET;
5460 SDValue Result = DAG.getTargetConstantPool(CP->getConstVal(), getPointerTy(),
5462 CP->getOffset(), OpFlag);
5463 DebugLoc DL = CP->getDebugLoc();
5464 Result = DAG.getNode(WrapperKind, DL, getPointerTy(), Result);
5465 // With PIC, the address is actually $g + Offset.
5467 Result = DAG.getNode(ISD::ADD, DL, getPointerTy(),
5468 DAG.getNode(X86ISD::GlobalBaseReg,
5469 DebugLoc(), getPointerTy()),
5476 SDValue X86TargetLowering::LowerJumpTable(SDValue Op, SelectionDAG &DAG) const {
5477 JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
5479 // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
5481 unsigned char OpFlag = 0;
5482 unsigned WrapperKind = X86ISD::Wrapper;
5483 CodeModel::Model M = getTargetMachine().getCodeModel();
5485 if (Subtarget->isPICStyleRIPRel() &&
5486 (M == CodeModel::Small || M == CodeModel::Kernel))
5487 WrapperKind = X86ISD::WrapperRIP;
5488 else if (Subtarget->isPICStyleGOT())
5489 OpFlag = X86II::MO_GOTOFF;
5490 else if (Subtarget->isPICStyleStubPIC())
5491 OpFlag = X86II::MO_PIC_BASE_OFFSET;
5493 SDValue Result = DAG.getTargetJumpTable(JT->getIndex(), getPointerTy(),
5495 DebugLoc DL = JT->getDebugLoc();
5496 Result = DAG.getNode(WrapperKind, DL, getPointerTy(), Result);
5498 // With PIC, the address is actually $g + Offset.
5500 Result = DAG.getNode(ISD::ADD, DL, getPointerTy(),
5501 DAG.getNode(X86ISD::GlobalBaseReg,
5502 DebugLoc(), getPointerTy()),
5510 X86TargetLowering::LowerExternalSymbol(SDValue Op, SelectionDAG &DAG) const {
5511 const char *Sym = cast<ExternalSymbolSDNode>(Op)->getSymbol();
5513 // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
5515 unsigned char OpFlag = 0;
5516 unsigned WrapperKind = X86ISD::Wrapper;
5517 CodeModel::Model M = getTargetMachine().getCodeModel();
5519 if (Subtarget->isPICStyleRIPRel() &&
5520 (M == CodeModel::Small || M == CodeModel::Kernel))
5521 WrapperKind = X86ISD::WrapperRIP;
5522 else if (Subtarget->isPICStyleGOT())
5523 OpFlag = X86II::MO_GOTOFF;
5524 else if (Subtarget->isPICStyleStubPIC())
5525 OpFlag = X86II::MO_PIC_BASE_OFFSET;
5527 SDValue Result = DAG.getTargetExternalSymbol(Sym, getPointerTy(), OpFlag);
5529 DebugLoc DL = Op.getDebugLoc();
5530 Result = DAG.getNode(WrapperKind, DL, getPointerTy(), Result);
5533 // With PIC, the address is actually $g + Offset.
5534 if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
5535 !Subtarget->is64Bit()) {
5536 Result = DAG.getNode(ISD::ADD, DL, getPointerTy(),
5537 DAG.getNode(X86ISD::GlobalBaseReg,
5538 DebugLoc(), getPointerTy()),
5546 X86TargetLowering::LowerBlockAddress(SDValue Op, SelectionDAG &DAG) const {
5547 // Create the TargetBlockAddressAddress node.
5548 unsigned char OpFlags =
5549 Subtarget->ClassifyBlockAddressReference();
5550 CodeModel::Model M = getTargetMachine().getCodeModel();
5551 const BlockAddress *BA = cast<BlockAddressSDNode>(Op)->getBlockAddress();
5552 DebugLoc dl = Op.getDebugLoc();
5553 SDValue Result = DAG.getBlockAddress(BA, getPointerTy(),
5554 /*isTarget=*/true, OpFlags);
5556 if (Subtarget->isPICStyleRIPRel() &&
5557 (M == CodeModel::Small || M == CodeModel::Kernel))
5558 Result = DAG.getNode(X86ISD::WrapperRIP, dl, getPointerTy(), Result);
5560 Result = DAG.getNode(X86ISD::Wrapper, dl, getPointerTy(), Result);
5562 // With PIC, the address is actually $g + Offset.
5563 if (isGlobalRelativeToPICBase(OpFlags)) {
5564 Result = DAG.getNode(ISD::ADD, dl, getPointerTy(),
5565 DAG.getNode(X86ISD::GlobalBaseReg, dl, getPointerTy()),
5573 X86TargetLowering::LowerGlobalAddress(const GlobalValue *GV, DebugLoc dl,
5575 SelectionDAG &DAG) const {
5576 // Create the TargetGlobalAddress node, folding in the constant
5577 // offset if it is legal.
5578 unsigned char OpFlags =
5579 Subtarget->ClassifyGlobalReference(GV, getTargetMachine());
5580 CodeModel::Model M = getTargetMachine().getCodeModel();
5582 if (OpFlags == X86II::MO_NO_FLAG &&
5583 X86::isOffsetSuitableForCodeModel(Offset, M)) {
5584 // A direct static reference to a global.
5585 Result = DAG.getTargetGlobalAddress(GV, dl, getPointerTy(), Offset);
5588 Result = DAG.getTargetGlobalAddress(GV, dl, getPointerTy(), 0, OpFlags);
5591 if (Subtarget->isPICStyleRIPRel() &&
5592 (M == CodeModel::Small || M == CodeModel::Kernel))
5593 Result = DAG.getNode(X86ISD::WrapperRIP, dl, getPointerTy(), Result);
5595 Result = DAG.getNode(X86ISD::Wrapper, dl, getPointerTy(), Result);
5597 // With PIC, the address is actually $g + Offset.
5598 if (isGlobalRelativeToPICBase(OpFlags)) {
5599 Result = DAG.getNode(ISD::ADD, dl, getPointerTy(),
5600 DAG.getNode(X86ISD::GlobalBaseReg, dl, getPointerTy()),
5604 // For globals that require a load from a stub to get the address, emit the
5606 if (isGlobalStubReference(OpFlags))
5607 Result = DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(), Result,
5608 PseudoSourceValue::getGOT(), 0, false, false, 0);
5610 // If there was a non-zero offset that we didn't fold, create an explicit
5613 Result = DAG.getNode(ISD::ADD, dl, getPointerTy(), Result,
5614 DAG.getConstant(Offset, getPointerTy()));
5620 X86TargetLowering::LowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const {
5621 const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
5622 int64_t Offset = cast<GlobalAddressSDNode>(Op)->getOffset();
5623 return LowerGlobalAddress(GV, Op.getDebugLoc(), Offset, DAG);
5627 GetTLSADDR(SelectionDAG &DAG, SDValue Chain, GlobalAddressSDNode *GA,
5628 SDValue *InFlag, const EVT PtrVT, unsigned ReturnReg,
5629 unsigned char OperandFlags) {
5630 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
5631 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Flag);
5632 DebugLoc dl = GA->getDebugLoc();
5633 SDValue TGA = DAG.getTargetGlobalAddress(GA->getGlobal(), dl,
5634 GA->getValueType(0),
5638 SDValue Ops[] = { Chain, TGA, *InFlag };
5639 Chain = DAG.getNode(X86ISD::TLSADDR, dl, NodeTys, Ops, 3);
5641 SDValue Ops[] = { Chain, TGA };
5642 Chain = DAG.getNode(X86ISD::TLSADDR, dl, NodeTys, Ops, 2);
5645 // TLSADDR will be codegen'ed as call. Inform MFI that function has calls.
5646 MFI->setAdjustsStack(true);
5648 SDValue Flag = Chain.getValue(1);
5649 return DAG.getCopyFromReg(Chain, dl, ReturnReg, PtrVT, Flag);
5652 // Lower ISD::GlobalTLSAddress using the "general dynamic" model, 32 bit
5654 LowerToTLSGeneralDynamicModel32(GlobalAddressSDNode *GA, SelectionDAG &DAG,
5657 DebugLoc dl = GA->getDebugLoc(); // ? function entry point might be better
5658 SDValue Chain = DAG.getCopyToReg(DAG.getEntryNode(), dl, X86::EBX,
5659 DAG.getNode(X86ISD::GlobalBaseReg,
5660 DebugLoc(), PtrVT), InFlag);
5661 InFlag = Chain.getValue(1);
5663 return GetTLSADDR(DAG, Chain, GA, &InFlag, PtrVT, X86::EAX, X86II::MO_TLSGD);
5666 // Lower ISD::GlobalTLSAddress using the "general dynamic" model, 64 bit
5668 LowerToTLSGeneralDynamicModel64(GlobalAddressSDNode *GA, SelectionDAG &DAG,
5670 return GetTLSADDR(DAG, DAG.getEntryNode(), GA, NULL, PtrVT,
5671 X86::RAX, X86II::MO_TLSGD);
5674 // Lower ISD::GlobalTLSAddress using the "initial exec" (for no-pic) or
5675 // "local exec" model.
5676 static SDValue LowerToTLSExecModel(GlobalAddressSDNode *GA, SelectionDAG &DAG,
5677 const EVT PtrVT, TLSModel::Model model,
5679 DebugLoc dl = GA->getDebugLoc();
5680 // Get the Thread Pointer
5681 SDValue Base = DAG.getNode(X86ISD::SegmentBaseAddress,
5683 DAG.getRegister(is64Bit? X86::FS : X86::GS,
5686 SDValue ThreadPointer = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), Base,
5687 NULL, 0, false, false, 0);
5689 unsigned char OperandFlags = 0;
5690 // Most TLS accesses are not RIP relative, even on x86-64. One exception is
5692 unsigned WrapperKind = X86ISD::Wrapper;
5693 if (model == TLSModel::LocalExec) {
5694 OperandFlags = is64Bit ? X86II::MO_TPOFF : X86II::MO_NTPOFF;
5695 } else if (is64Bit) {
5696 assert(model == TLSModel::InitialExec);
5697 OperandFlags = X86II::MO_GOTTPOFF;
5698 WrapperKind = X86ISD::WrapperRIP;
5700 assert(model == TLSModel::InitialExec);
5701 OperandFlags = X86II::MO_INDNTPOFF;
5704 // emit "addl x@ntpoff,%eax" (local exec) or "addl x@indntpoff,%eax" (initial
5706 SDValue TGA = DAG.getTargetGlobalAddress(GA->getGlobal(), dl,
5707 GA->getValueType(0),
5708 GA->getOffset(), OperandFlags);
5709 SDValue Offset = DAG.getNode(WrapperKind, dl, PtrVT, TGA);
5711 if (model == TLSModel::InitialExec)
5712 Offset = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), Offset,
5713 PseudoSourceValue::getGOT(), 0, false, false, 0);
5715 // The address of the thread local variable is the add of the thread
5716 // pointer with the offset of the variable.
5717 return DAG.getNode(ISD::ADD, dl, PtrVT, ThreadPointer, Offset);
5721 X86TargetLowering::LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const {
5723 GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op);
5724 const GlobalValue *GV = GA->getGlobal();
5726 if (Subtarget->isTargetELF()) {
5727 // TODO: implement the "local dynamic" model
5728 // TODO: implement the "initial exec"model for pic executables
5730 // If GV is an alias then use the aliasee for determining
5731 // thread-localness.
5732 if (const GlobalAlias *GA = dyn_cast<GlobalAlias>(GV))
5733 GV = GA->resolveAliasedGlobal(false);
5735 TLSModel::Model model
5736 = getTLSModel(GV, getTargetMachine().getRelocationModel());
5739 case TLSModel::GeneralDynamic:
5740 case TLSModel::LocalDynamic: // not implemented
5741 if (Subtarget->is64Bit())
5742 return LowerToTLSGeneralDynamicModel64(GA, DAG, getPointerTy());
5743 return LowerToTLSGeneralDynamicModel32(GA, DAG, getPointerTy());
5745 case TLSModel::InitialExec:
5746 case TLSModel::LocalExec:
5747 return LowerToTLSExecModel(GA, DAG, getPointerTy(), model,
5748 Subtarget->is64Bit());
5750 } else if (Subtarget->isTargetDarwin()) {
5751 // Darwin only has one model of TLS. Lower to that.
5752 unsigned char OpFlag = 0;
5753 unsigned WrapperKind = Subtarget->isPICStyleRIPRel() ?
5754 X86ISD::WrapperRIP : X86ISD::Wrapper;
5756 // In PIC mode (unless we're in RIPRel PIC mode) we add an offset to the
5758 bool PIC32 = (getTargetMachine().getRelocationModel() == Reloc::PIC_) &&
5759 !Subtarget->is64Bit();
5761 OpFlag = X86II::MO_TLVP_PIC_BASE;
5763 OpFlag = X86II::MO_TLVP;
5764 DebugLoc DL = Op.getDebugLoc();
5765 SDValue Result = DAG.getTargetGlobalAddress(GA->getGlobal(), DL,
5767 GA->getOffset(), OpFlag);
5768 SDValue Offset = DAG.getNode(WrapperKind, DL, getPointerTy(), Result);
5770 // With PIC32, the address is actually $g + Offset.
5772 Offset = DAG.getNode(ISD::ADD, DL, getPointerTy(),
5773 DAG.getNode(X86ISD::GlobalBaseReg,
5774 DebugLoc(), getPointerTy()),
5777 // Lowering the machine isd will make sure everything is in the right
5779 SDValue Args[] = { Offset };
5780 SDValue Chain = DAG.getNode(X86ISD::TLSCALL, DL, MVT::Other, Args, 1);
5782 // TLSCALL will be codegen'ed as call. Inform MFI that function has calls.
5783 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
5784 MFI->setAdjustsStack(true);
5786 // And our return value (tls address) is in the standard call return value
5788 unsigned Reg = Subtarget->is64Bit() ? X86::RAX : X86::EAX;
5789 return DAG.getCopyFromReg(Chain, DL, Reg, getPointerTy());
5793 "TLS not implemented for this target.");
5795 llvm_unreachable("Unreachable");
5800 /// LowerShift - Lower SRA_PARTS and friends, which return two i32 values and
5801 /// take a 2 x i32 value to shift plus a shift amount.
5802 SDValue X86TargetLowering::LowerShift(SDValue Op, SelectionDAG &DAG) const {
5803 assert(Op.getNumOperands() == 3 && "Not a double-shift!");
5804 EVT VT = Op.getValueType();
5805 unsigned VTBits = VT.getSizeInBits();
5806 DebugLoc dl = Op.getDebugLoc();
5807 bool isSRA = Op.getOpcode() == ISD::SRA_PARTS;
5808 SDValue ShOpLo = Op.getOperand(0);
5809 SDValue ShOpHi = Op.getOperand(1);
5810 SDValue ShAmt = Op.getOperand(2);
5811 SDValue Tmp1 = isSRA ? DAG.getNode(ISD::SRA, dl, VT, ShOpHi,
5812 DAG.getConstant(VTBits - 1, MVT::i8))
5813 : DAG.getConstant(0, VT);
5816 if (Op.getOpcode() == ISD::SHL_PARTS) {
5817 Tmp2 = DAG.getNode(X86ISD::SHLD, dl, VT, ShOpHi, ShOpLo, ShAmt);
5818 Tmp3 = DAG.getNode(ISD::SHL, dl, VT, ShOpLo, ShAmt);
5820 Tmp2 = DAG.getNode(X86ISD::SHRD, dl, VT, ShOpLo, ShOpHi, ShAmt);
5821 Tmp3 = DAG.getNode(isSRA ? ISD::SRA : ISD::SRL, dl, VT, ShOpHi, ShAmt);
5824 SDValue AndNode = DAG.getNode(ISD::AND, dl, MVT::i8, ShAmt,
5825 DAG.getConstant(VTBits, MVT::i8));
5826 SDValue Cond = DAG.getNode(X86ISD::CMP, dl, MVT::i32,
5827 AndNode, DAG.getConstant(0, MVT::i8));
5830 SDValue CC = DAG.getConstant(X86::COND_NE, MVT::i8);
5831 SDValue Ops0[4] = { Tmp2, Tmp3, CC, Cond };
5832 SDValue Ops1[4] = { Tmp3, Tmp1, CC, Cond };
5834 if (Op.getOpcode() == ISD::SHL_PARTS) {
5835 Hi = DAG.getNode(X86ISD::CMOV, dl, VT, Ops0, 4);
5836 Lo = DAG.getNode(X86ISD::CMOV, dl, VT, Ops1, 4);
5838 Lo = DAG.getNode(X86ISD::CMOV, dl, VT, Ops0, 4);
5839 Hi = DAG.getNode(X86ISD::CMOV, dl, VT, Ops1, 4);
5842 SDValue Ops[2] = { Lo, Hi };
5843 return DAG.getMergeValues(Ops, 2, dl);
5846 SDValue X86TargetLowering::LowerSINT_TO_FP(SDValue Op,
5847 SelectionDAG &DAG) const {
5848 EVT SrcVT = Op.getOperand(0).getValueType();
5850 if (SrcVT.isVector()) {
5851 if (SrcVT == MVT::v2i32 && Op.getValueType() == MVT::v2f64) {
5857 assert(SrcVT.getSimpleVT() <= MVT::i64 && SrcVT.getSimpleVT() >= MVT::i16 &&
5858 "Unknown SINT_TO_FP to lower!");
5860 // These are really Legal; return the operand so the caller accepts it as
5862 if (SrcVT == MVT::i32 && isScalarFPTypeInSSEReg(Op.getValueType()))
5864 if (SrcVT == MVT::i64 && isScalarFPTypeInSSEReg(Op.getValueType()) &&
5865 Subtarget->is64Bit()) {
5869 DebugLoc dl = Op.getDebugLoc();
5870 unsigned Size = SrcVT.getSizeInBits()/8;
5871 MachineFunction &MF = DAG.getMachineFunction();
5872 int SSFI = MF.getFrameInfo()->CreateStackObject(Size, Size, false);
5873 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
5874 SDValue Chain = DAG.getStore(DAG.getEntryNode(), dl, Op.getOperand(0),
5876 PseudoSourceValue::getFixedStack(SSFI), 0,
5878 return BuildFILD(Op, SrcVT, Chain, StackSlot, DAG);
5881 SDValue X86TargetLowering::BuildFILD(SDValue Op, EVT SrcVT, SDValue Chain,
5883 SelectionDAG &DAG) const {
5885 DebugLoc dl = Op.getDebugLoc();
5887 bool useSSE = isScalarFPTypeInSSEReg(Op.getValueType());
5889 Tys = DAG.getVTList(MVT::f64, MVT::Other, MVT::Flag);
5891 Tys = DAG.getVTList(Op.getValueType(), MVT::Other);
5892 SDValue Ops[] = { Chain, StackSlot, DAG.getValueType(SrcVT) };
5893 SDValue Result = DAG.getNode(useSSE ? X86ISD::FILD_FLAG : X86ISD::FILD, dl,
5894 Tys, Ops, array_lengthof(Ops));
5897 Chain = Result.getValue(1);
5898 SDValue InFlag = Result.getValue(2);
5900 // FIXME: Currently the FST is flagged to the FILD_FLAG. This
5901 // shouldn't be necessary except that RFP cannot be live across
5902 // multiple blocks. When stackifier is fixed, they can be uncoupled.
5903 MachineFunction &MF = DAG.getMachineFunction();
5904 int SSFI = MF.getFrameInfo()->CreateStackObject(8, 8, false);
5905 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
5906 Tys = DAG.getVTList(MVT::Other);
5908 Chain, Result, StackSlot, DAG.getValueType(Op.getValueType()), InFlag
5910 Chain = DAG.getNode(X86ISD::FST, dl, Tys, Ops, array_lengthof(Ops));
5911 Result = DAG.getLoad(Op.getValueType(), dl, Chain, StackSlot,
5912 PseudoSourceValue::getFixedStack(SSFI), 0,
5919 // LowerUINT_TO_FP_i64 - 64-bit unsigned integer to double expansion.
5920 SDValue X86TargetLowering::LowerUINT_TO_FP_i64(SDValue Op,
5921 SelectionDAG &DAG) const {
5922 // This algorithm is not obvious. Here it is in C code, more or less:
5924 double uint64_to_double( uint32_t hi, uint32_t lo ) {
5925 static const __m128i exp = { 0x4330000045300000ULL, 0 };
5926 static const __m128d bias = { 0x1.0p84, 0x1.0p52 };
5928 // Copy ints to xmm registers.
5929 __m128i xh = _mm_cvtsi32_si128( hi );
5930 __m128i xl = _mm_cvtsi32_si128( lo );
5932 // Combine into low half of a single xmm register.
5933 __m128i x = _mm_unpacklo_epi32( xh, xl );
5937 // Merge in appropriate exponents to give the integer bits the right
5939 x = _mm_unpacklo_epi32( x, exp );
5941 // Subtract away the biases to deal with the IEEE-754 double precision
5943 d = _mm_sub_pd( (__m128d) x, bias );
5945 // All conversions up to here are exact. The correctly rounded result is
5946 // calculated using the current rounding mode using the following
5948 d = _mm_add_sd( d, _mm_unpackhi_pd( d, d ) );
5949 _mm_store_sd( &sd, d ); // Because we are returning doubles in XMM, this
5950 // store doesn't really need to be here (except
5951 // maybe to zero the other double)
5956 DebugLoc dl = Op.getDebugLoc();
5957 LLVMContext *Context = DAG.getContext();
5959 // Build some magic constants.
5960 std::vector<Constant*> CV0;
5961 CV0.push_back(ConstantInt::get(*Context, APInt(32, 0x45300000)));
5962 CV0.push_back(ConstantInt::get(*Context, APInt(32, 0x43300000)));
5963 CV0.push_back(ConstantInt::get(*Context, APInt(32, 0)));
5964 CV0.push_back(ConstantInt::get(*Context, APInt(32, 0)));
5965 Constant *C0 = ConstantVector::get(CV0);
5966 SDValue CPIdx0 = DAG.getConstantPool(C0, getPointerTy(), 16);
5968 std::vector<Constant*> CV1;
5970 ConstantFP::get(*Context, APFloat(APInt(64, 0x4530000000000000ULL))));
5972 ConstantFP::get(*Context, APFloat(APInt(64, 0x4330000000000000ULL))));
5973 Constant *C1 = ConstantVector::get(CV1);
5974 SDValue CPIdx1 = DAG.getConstantPool(C1, getPointerTy(), 16);
5976 SDValue XR1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32,
5977 DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
5979 DAG.getIntPtrConstant(1)));
5980 SDValue XR2 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32,
5981 DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
5983 DAG.getIntPtrConstant(0)));
5984 SDValue Unpck1 = getUnpackl(DAG, dl, MVT::v4i32, XR1, XR2);
5985 SDValue CLod0 = DAG.getLoad(MVT::v4i32, dl, DAG.getEntryNode(), CPIdx0,
5986 PseudoSourceValue::getConstantPool(), 0,
5988 SDValue Unpck2 = getUnpackl(DAG, dl, MVT::v4i32, Unpck1, CLod0);
5989 SDValue XR2F = DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v2f64, Unpck2);
5990 SDValue CLod1 = DAG.getLoad(MVT::v2f64, dl, CLod0.getValue(1), CPIdx1,
5991 PseudoSourceValue::getConstantPool(), 0,
5993 SDValue Sub = DAG.getNode(ISD::FSUB, dl, MVT::v2f64, XR2F, CLod1);
5995 // Add the halves; easiest way is to swap them into another reg first.
5996 int ShufMask[2] = { 1, -1 };
5997 SDValue Shuf = DAG.getVectorShuffle(MVT::v2f64, dl, Sub,
5998 DAG.getUNDEF(MVT::v2f64), ShufMask);
5999 SDValue Add = DAG.getNode(ISD::FADD, dl, MVT::v2f64, Shuf, Sub);
6000 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Add,
6001 DAG.getIntPtrConstant(0));
6004 // LowerUINT_TO_FP_i32 - 32-bit unsigned integer to float expansion.
6005 SDValue X86TargetLowering::LowerUINT_TO_FP_i32(SDValue Op,
6006 SelectionDAG &DAG) const {
6007 DebugLoc dl = Op.getDebugLoc();
6008 // FP constant to bias correct the final result.
6009 SDValue Bias = DAG.getConstantFP(BitsToDouble(0x4330000000000000ULL),
6012 // Load the 32-bit value into an XMM register.
6013 SDValue Load = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32,
6014 DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
6016 DAG.getIntPtrConstant(0)));
6018 Load = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64,
6019 DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v2f64, Load),
6020 DAG.getIntPtrConstant(0));
6022 // Or the load with the bias.
6023 SDValue Or = DAG.getNode(ISD::OR, dl, MVT::v2i64,
6024 DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v2i64,
6025 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
6027 DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v2i64,
6028 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
6029 MVT::v2f64, Bias)));
6030 Or = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64,
6031 DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v2f64, Or),
6032 DAG.getIntPtrConstant(0));
6034 // Subtract the bias.
6035 SDValue Sub = DAG.getNode(ISD::FSUB, dl, MVT::f64, Or, Bias);
6037 // Handle final rounding.
6038 EVT DestVT = Op.getValueType();
6040 if (DestVT.bitsLT(MVT::f64)) {
6041 return DAG.getNode(ISD::FP_ROUND, dl, DestVT, Sub,
6042 DAG.getIntPtrConstant(0));
6043 } else if (DestVT.bitsGT(MVT::f64)) {
6044 return DAG.getNode(ISD::FP_EXTEND, dl, DestVT, Sub);
6047 // Handle final rounding.
6051 SDValue X86TargetLowering::LowerUINT_TO_FP(SDValue Op,
6052 SelectionDAG &DAG) const {
6053 SDValue N0 = Op.getOperand(0);
6054 DebugLoc dl = Op.getDebugLoc();
6056 // Since UINT_TO_FP is legal (it's marked custom), dag combiner won't
6057 // optimize it to a SINT_TO_FP when the sign bit is known zero. Perform
6058 // the optimization here.
6059 if (DAG.SignBitIsZero(N0))
6060 return DAG.getNode(ISD::SINT_TO_FP, dl, Op.getValueType(), N0);
6062 EVT SrcVT = N0.getValueType();
6063 EVT DstVT = Op.getValueType();
6064 if (SrcVT == MVT::i64 && DstVT == MVT::f64 && X86ScalarSSEf64)
6065 return LowerUINT_TO_FP_i64(Op, DAG);
6066 else if (SrcVT == MVT::i32 && X86ScalarSSEf64)
6067 return LowerUINT_TO_FP_i32(Op, DAG);
6069 // Make a 64-bit buffer, and use it to build an FILD.
6070 SDValue StackSlot = DAG.CreateStackTemporary(MVT::i64);
6071 if (SrcVT == MVT::i32) {
6072 SDValue WordOff = DAG.getConstant(4, getPointerTy());
6073 SDValue OffsetSlot = DAG.getNode(ISD::ADD, dl,
6074 getPointerTy(), StackSlot, WordOff);
6075 SDValue Store1 = DAG.getStore(DAG.getEntryNode(), dl, Op.getOperand(0),
6076 StackSlot, NULL, 0, false, false, 0);
6077 SDValue Store2 = DAG.getStore(Store1, dl, DAG.getConstant(0, MVT::i32),
6078 OffsetSlot, NULL, 0, false, false, 0);
6079 SDValue Fild = BuildFILD(Op, MVT::i64, Store2, StackSlot, DAG);
6083 assert(SrcVT == MVT::i64 && "Unexpected type in UINT_TO_FP");
6084 SDValue Store = DAG.getStore(DAG.getEntryNode(), dl, Op.getOperand(0),
6085 StackSlot, NULL, 0, false, false, 0);
6086 // For i64 source, we need to add the appropriate power of 2 if the input
6087 // was negative. This is the same as the optimization in
6088 // DAGTypeLegalizer::ExpandIntOp_UNIT_TO_FP, and for it to be safe here,
6089 // we must be careful to do the computation in x87 extended precision, not
6090 // in SSE. (The generic code can't know it's OK to do this, or how to.)
6091 SDVTList Tys = DAG.getVTList(MVT::f80, MVT::Other);
6092 SDValue Ops[] = { Store, StackSlot, DAG.getValueType(MVT::i64) };
6093 SDValue Fild = DAG.getNode(X86ISD::FILD, dl, Tys, Ops, 3);
6095 APInt FF(32, 0x5F800000ULL);
6097 // Check whether the sign bit is set.
6098 SDValue SignSet = DAG.getSetCC(dl, getSetCCResultType(MVT::i64),
6099 Op.getOperand(0), DAG.getConstant(0, MVT::i64),
6102 // Build a 64 bit pair (0, FF) in the constant pool, with FF in the lo bits.
6103 SDValue FudgePtr = DAG.getConstantPool(
6104 ConstantInt::get(*DAG.getContext(), FF.zext(64)),
6107 // Get a pointer to FF if the sign bit was set, or to 0 otherwise.
6108 SDValue Zero = DAG.getIntPtrConstant(0);
6109 SDValue Four = DAG.getIntPtrConstant(4);
6110 SDValue Offset = DAG.getNode(ISD::SELECT, dl, Zero.getValueType(), SignSet,
6112 FudgePtr = DAG.getNode(ISD::ADD, dl, getPointerTy(), FudgePtr, Offset);
6114 // Load the value out, extending it from f32 to f80.
6115 // FIXME: Avoid the extend by constructing the right constant pool?
6116 SDValue Fudge = DAG.getExtLoad(ISD::EXTLOAD, MVT::f80, dl, DAG.getEntryNode(),
6117 FudgePtr, PseudoSourceValue::getConstantPool(),
6118 0, MVT::f32, false, false, 4);
6119 // Extend everything to 80 bits to force it to be done on x87.
6120 SDValue Add = DAG.getNode(ISD::FADD, dl, MVT::f80, Fild, Fudge);
6121 return DAG.getNode(ISD::FP_ROUND, dl, DstVT, Add, DAG.getIntPtrConstant(0));
6124 std::pair<SDValue,SDValue> X86TargetLowering::
6125 FP_TO_INTHelper(SDValue Op, SelectionDAG &DAG, bool IsSigned) const {
6126 DebugLoc dl = Op.getDebugLoc();
6128 EVT DstTy = Op.getValueType();
6131 assert(DstTy == MVT::i32 && "Unexpected FP_TO_UINT");
6135 assert(DstTy.getSimpleVT() <= MVT::i64 &&
6136 DstTy.getSimpleVT() >= MVT::i16 &&
6137 "Unknown FP_TO_SINT to lower!");
6139 // These are really Legal.
6140 if (DstTy == MVT::i32 &&
6141 isScalarFPTypeInSSEReg(Op.getOperand(0).getValueType()))
6142 return std::make_pair(SDValue(), SDValue());
6143 if (Subtarget->is64Bit() &&
6144 DstTy == MVT::i64 &&
6145 isScalarFPTypeInSSEReg(Op.getOperand(0).getValueType()))
6146 return std::make_pair(SDValue(), SDValue());
6148 // We lower FP->sint64 into FISTP64, followed by a load, all to a temporary
6150 MachineFunction &MF = DAG.getMachineFunction();
6151 unsigned MemSize = DstTy.getSizeInBits()/8;
6152 int SSFI = MF.getFrameInfo()->CreateStackObject(MemSize, MemSize, false);
6153 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
6156 switch (DstTy.getSimpleVT().SimpleTy) {
6157 default: llvm_unreachable("Invalid FP_TO_SINT to lower!");
6158 case MVT::i16: Opc = X86ISD::FP_TO_INT16_IN_MEM; break;
6159 case MVT::i32: Opc = X86ISD::FP_TO_INT32_IN_MEM; break;
6160 case MVT::i64: Opc = X86ISD::FP_TO_INT64_IN_MEM; break;
6163 SDValue Chain = DAG.getEntryNode();
6164 SDValue Value = Op.getOperand(0);
6165 if (isScalarFPTypeInSSEReg(Op.getOperand(0).getValueType())) {
6166 assert(DstTy == MVT::i64 && "Invalid FP_TO_SINT to lower!");
6167 Chain = DAG.getStore(Chain, dl, Value, StackSlot,
6168 PseudoSourceValue::getFixedStack(SSFI), 0,
6170 SDVTList Tys = DAG.getVTList(Op.getOperand(0).getValueType(), MVT::Other);
6172 Chain, StackSlot, DAG.getValueType(Op.getOperand(0).getValueType())
6174 Value = DAG.getNode(X86ISD::FLD, dl, Tys, Ops, 3);
6175 Chain = Value.getValue(1);
6176 SSFI = MF.getFrameInfo()->CreateStackObject(MemSize, MemSize, false);
6177 StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
6180 // Build the FP_TO_INT*_IN_MEM
6181 SDValue Ops[] = { Chain, Value, StackSlot };
6182 SDValue FIST = DAG.getNode(Opc, dl, MVT::Other, Ops, 3);
6184 return std::make_pair(FIST, StackSlot);
6187 SDValue X86TargetLowering::LowerFP_TO_SINT(SDValue Op,
6188 SelectionDAG &DAG) const {
6189 if (Op.getValueType().isVector()) {
6190 if (Op.getValueType() == MVT::v2i32 &&
6191 Op.getOperand(0).getValueType() == MVT::v2f64) {
6197 std::pair<SDValue,SDValue> Vals = FP_TO_INTHelper(Op, DAG, true);
6198 SDValue FIST = Vals.first, StackSlot = Vals.second;
6199 // If FP_TO_INTHelper failed, the node is actually supposed to be Legal.
6200 if (FIST.getNode() == 0) return Op;
6203 return DAG.getLoad(Op.getValueType(), Op.getDebugLoc(),
6204 FIST, StackSlot, NULL, 0, false, false, 0);
6207 SDValue X86TargetLowering::LowerFP_TO_UINT(SDValue Op,
6208 SelectionDAG &DAG) const {
6209 std::pair<SDValue,SDValue> Vals = FP_TO_INTHelper(Op, DAG, false);
6210 SDValue FIST = Vals.first, StackSlot = Vals.second;
6211 assert(FIST.getNode() && "Unexpected failure");
6214 return DAG.getLoad(Op.getValueType(), Op.getDebugLoc(),
6215 FIST, StackSlot, NULL, 0, false, false, 0);
6218 SDValue X86TargetLowering::LowerFABS(SDValue Op,
6219 SelectionDAG &DAG) const {
6220 LLVMContext *Context = DAG.getContext();
6221 DebugLoc dl = Op.getDebugLoc();
6222 EVT VT = Op.getValueType();
6225 EltVT = VT.getVectorElementType();
6226 std::vector<Constant*> CV;
6227 if (EltVT == MVT::f64) {
6228 Constant *C = ConstantFP::get(*Context, APFloat(APInt(64, ~(1ULL << 63))));
6232 Constant *C = ConstantFP::get(*Context, APFloat(APInt(32, ~(1U << 31))));
6238 Constant *C = ConstantVector::get(CV);
6239 SDValue CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
6240 SDValue Mask = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
6241 PseudoSourceValue::getConstantPool(), 0,
6243 return DAG.getNode(X86ISD::FAND, dl, VT, Op.getOperand(0), Mask);
6246 SDValue X86TargetLowering::LowerFNEG(SDValue Op, SelectionDAG &DAG) const {
6247 LLVMContext *Context = DAG.getContext();
6248 DebugLoc dl = Op.getDebugLoc();
6249 EVT VT = Op.getValueType();
6252 EltVT = VT.getVectorElementType();
6253 std::vector<Constant*> CV;
6254 if (EltVT == MVT::f64) {
6255 Constant *C = ConstantFP::get(*Context, APFloat(APInt(64, 1ULL << 63)));
6259 Constant *C = ConstantFP::get(*Context, APFloat(APInt(32, 1U << 31)));
6265 Constant *C = ConstantVector::get(CV);
6266 SDValue CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
6267 SDValue Mask = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
6268 PseudoSourceValue::getConstantPool(), 0,
6270 if (VT.isVector()) {
6271 return DAG.getNode(ISD::BIT_CONVERT, dl, VT,
6272 DAG.getNode(ISD::XOR, dl, MVT::v2i64,
6273 DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v2i64,
6275 DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v2i64, Mask)));
6277 return DAG.getNode(X86ISD::FXOR, dl, VT, Op.getOperand(0), Mask);
6281 SDValue X86TargetLowering::LowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) const {
6282 LLVMContext *Context = DAG.getContext();
6283 SDValue Op0 = Op.getOperand(0);
6284 SDValue Op1 = Op.getOperand(1);
6285 DebugLoc dl = Op.getDebugLoc();
6286 EVT VT = Op.getValueType();
6287 EVT SrcVT = Op1.getValueType();
6289 // If second operand is smaller, extend it first.
6290 if (SrcVT.bitsLT(VT)) {
6291 Op1 = DAG.getNode(ISD::FP_EXTEND, dl, VT, Op1);
6294 // And if it is bigger, shrink it first.
6295 if (SrcVT.bitsGT(VT)) {
6296 Op1 = DAG.getNode(ISD::FP_ROUND, dl, VT, Op1, DAG.getIntPtrConstant(1));
6300 // At this point the operands and the result should have the same
6301 // type, and that won't be f80 since that is not custom lowered.
6303 // First get the sign bit of second operand.
6304 std::vector<Constant*> CV;
6305 if (SrcVT == MVT::f64) {
6306 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(64, 1ULL << 63))));
6307 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(64, 0))));
6309 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 1U << 31))));
6310 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 0))));
6311 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 0))));
6312 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 0))));
6314 Constant *C = ConstantVector::get(CV);
6315 SDValue CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
6316 SDValue Mask1 = DAG.getLoad(SrcVT, dl, DAG.getEntryNode(), CPIdx,
6317 PseudoSourceValue::getConstantPool(), 0,
6319 SDValue SignBit = DAG.getNode(X86ISD::FAND, dl, SrcVT, Op1, Mask1);
6321 // Shift sign bit right or left if the two operands have different types.
6322 if (SrcVT.bitsGT(VT)) {
6323 // Op0 is MVT::f32, Op1 is MVT::f64.
6324 SignBit = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2f64, SignBit);
6325 SignBit = DAG.getNode(X86ISD::FSRL, dl, MVT::v2f64, SignBit,
6326 DAG.getConstant(32, MVT::i32));
6327 SignBit = DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v4f32, SignBit);
6328 SignBit = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f32, SignBit,
6329 DAG.getIntPtrConstant(0));
6332 // Clear first operand sign bit.
6334 if (VT == MVT::f64) {
6335 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(64, ~(1ULL << 63)))));
6336 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(64, 0))));
6338 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, ~(1U << 31)))));
6339 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 0))));
6340 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 0))));
6341 CV.push_back(ConstantFP::get(*Context, APFloat(APInt(32, 0))));
6343 C = ConstantVector::get(CV);
6344 CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
6345 SDValue Mask2 = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
6346 PseudoSourceValue::getConstantPool(), 0,
6348 SDValue Val = DAG.getNode(X86ISD::FAND, dl, VT, Op0, Mask2);
6350 // Or the value with the sign bit.
6351 return DAG.getNode(X86ISD::FOR, dl, VT, Val, SignBit);
6354 /// Emit nodes that will be selected as "test Op0,Op0", or something
6356 SDValue X86TargetLowering::EmitTest(SDValue Op, unsigned X86CC,
6357 SelectionDAG &DAG) const {
6358 DebugLoc dl = Op.getDebugLoc();
6360 // CF and OF aren't always set the way we want. Determine which
6361 // of these we need.
6362 bool NeedCF = false;
6363 bool NeedOF = false;
6366 case X86::COND_A: case X86::COND_AE:
6367 case X86::COND_B: case X86::COND_BE:
6370 case X86::COND_G: case X86::COND_GE:
6371 case X86::COND_L: case X86::COND_LE:
6372 case X86::COND_O: case X86::COND_NO:
6377 // See if we can use the EFLAGS value from the operand instead of
6378 // doing a separate TEST. TEST always sets OF and CF to 0, so unless
6379 // we prove that the arithmetic won't overflow, we can't use OF or CF.
6380 if (Op.getResNo() != 0 || NeedOF || NeedCF)
6381 // Emit a CMP with 0, which is the TEST pattern.
6382 return DAG.getNode(X86ISD::CMP, dl, MVT::i32, Op,
6383 DAG.getConstant(0, Op.getValueType()));
6385 unsigned Opcode = 0;
6386 unsigned NumOperands = 0;
6387 switch (Op.getNode()->getOpcode()) {
6389 // Due to an isel shortcoming, be conservative if this add is likely to be
6390 // selected as part of a load-modify-store instruction. When the root node
6391 // in a match is a store, isel doesn't know how to remap non-chain non-flag
6392 // uses of other nodes in the match, such as the ADD in this case. This
6393 // leads to the ADD being left around and reselected, with the result being
6394 // two adds in the output. Alas, even if none our users are stores, that
6395 // doesn't prove we're O.K. Ergo, if we have any parents that aren't
6396 // CopyToReg or SETCC, eschew INC/DEC. A better fix seems to require
6397 // climbing the DAG back to the root, and it doesn't seem to be worth the
6399 for (SDNode::use_iterator UI = Op.getNode()->use_begin(),
6400 UE = Op.getNode()->use_end(); UI != UE; ++UI)
6401 if (UI->getOpcode() != ISD::CopyToReg && UI->getOpcode() != ISD::SETCC)
6404 if (ConstantSDNode *C =
6405 dyn_cast<ConstantSDNode>(Op.getNode()->getOperand(1))) {
6406 // An add of one will be selected as an INC.
6407 if (C->getAPIntValue() == 1) {
6408 Opcode = X86ISD::INC;
6413 // An add of negative one (subtract of one) will be selected as a DEC.
6414 if (C->getAPIntValue().isAllOnesValue()) {
6415 Opcode = X86ISD::DEC;
6421 // Otherwise use a regular EFLAGS-setting add.
6422 Opcode = X86ISD::ADD;
6426 // If the primary and result isn't used, don't bother using X86ISD::AND,
6427 // because a TEST instruction will be better.
6428 bool NonFlagUse = false;
6429 for (SDNode::use_iterator UI = Op.getNode()->use_begin(),
6430 UE = Op.getNode()->use_end(); UI != UE; ++UI) {
6432 unsigned UOpNo = UI.getOperandNo();
6433 if (User->getOpcode() == ISD::TRUNCATE && User->hasOneUse()) {
6434 // Look pass truncate.
6435 UOpNo = User->use_begin().getOperandNo();
6436 User = *User->use_begin();
6439 if (User->getOpcode() != ISD::BRCOND &&
6440 User->getOpcode() != ISD::SETCC &&
6441 (User->getOpcode() != ISD::SELECT || UOpNo != 0)) {
6454 // Due to the ISEL shortcoming noted above, be conservative if this op is
6455 // likely to be selected as part of a load-modify-store instruction.
6456 for (SDNode::use_iterator UI = Op.getNode()->use_begin(),
6457 UE = Op.getNode()->use_end(); UI != UE; ++UI)
6458 if (UI->getOpcode() == ISD::STORE)
6461 // Otherwise use a regular EFLAGS-setting instruction.
6462 switch (Op.getNode()->getOpcode()) {
6463 default: llvm_unreachable("unexpected operator!");
6464 case ISD::SUB: Opcode = X86ISD::SUB; break;
6465 case ISD::OR: Opcode = X86ISD::OR; break;
6466 case ISD::XOR: Opcode = X86ISD::XOR; break;
6467 case ISD::AND: Opcode = X86ISD::AND; break;
6479 return SDValue(Op.getNode(), 1);
6486 // Emit a CMP with 0, which is the TEST pattern.
6487 return DAG.getNode(X86ISD::CMP, dl, MVT::i32, Op,
6488 DAG.getConstant(0, Op.getValueType()));
6490 SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::i32);
6491 SmallVector<SDValue, 4> Ops;
6492 for (unsigned i = 0; i != NumOperands; ++i)
6493 Ops.push_back(Op.getOperand(i));
6495 SDValue New = DAG.getNode(Opcode, dl, VTs, &Ops[0], NumOperands);
6496 DAG.ReplaceAllUsesWith(Op, New);
6497 return SDValue(New.getNode(), 1);
6500 /// Emit nodes that will be selected as "cmp Op0,Op1", or something
6502 SDValue X86TargetLowering::EmitCmp(SDValue Op0, SDValue Op1, unsigned X86CC,
6503 SelectionDAG &DAG) const {
6504 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op1))
6505 if (C->getAPIntValue() == 0)
6506 return EmitTest(Op0, X86CC, DAG);
6508 DebugLoc dl = Op0.getDebugLoc();
6509 return DAG.getNode(X86ISD::CMP, dl, MVT::i32, Op0, Op1);
6512 /// LowerToBT - Result of 'and' is compared against zero. Turn it into a BT node
6513 /// if it's possible.
6514 SDValue X86TargetLowering::LowerToBT(SDValue And, ISD::CondCode CC,
6515 DebugLoc dl, SelectionDAG &DAG) const {
6516 SDValue Op0 = And.getOperand(0);
6517 SDValue Op1 = And.getOperand(1);
6518 if (Op0.getOpcode() == ISD::TRUNCATE)
6519 Op0 = Op0.getOperand(0);
6520 if (Op1.getOpcode() == ISD::TRUNCATE)
6521 Op1 = Op1.getOperand(0);
6524 if (Op1.getOpcode() == ISD::SHL)
6525 std::swap(Op0, Op1);
6526 if (Op0.getOpcode() == ISD::SHL) {
6527 if (ConstantSDNode *And00C = dyn_cast<ConstantSDNode>(Op0.getOperand(0)))
6528 if (And00C->getZExtValue() == 1) {
6529 // If we looked past a truncate, check that it's only truncating away
6531 unsigned BitWidth = Op0.getValueSizeInBits();
6532 unsigned AndBitWidth = And.getValueSizeInBits();
6533 if (BitWidth > AndBitWidth) {
6534 APInt Mask = APInt::getAllOnesValue(BitWidth), Zeros, Ones;
6535 DAG.ComputeMaskedBits(Op0, Mask, Zeros, Ones);
6536 if (Zeros.countLeadingOnes() < BitWidth - AndBitWidth)
6540 RHS = Op0.getOperand(1);
6542 } else if (Op1.getOpcode() == ISD::Constant) {
6543 ConstantSDNode *AndRHS = cast<ConstantSDNode>(Op1);
6544 SDValue AndLHS = Op0;
6545 if (AndRHS->getZExtValue() == 1 && AndLHS.getOpcode() == ISD::SRL) {
6546 LHS = AndLHS.getOperand(0);
6547 RHS = AndLHS.getOperand(1);
6551 if (LHS.getNode()) {
6552 // If LHS is i8, promote it to i32 with any_extend. There is no i8 BT
6553 // instruction. Since the shift amount is in-range-or-undefined, we know
6554 // that doing a bittest on the i32 value is ok. We extend to i32 because
6555 // the encoding for the i16 version is larger than the i32 version.
6556 // Also promote i16 to i32 for performance / code size reason.
6557 if (LHS.getValueType() == MVT::i8 ||
6558 LHS.getValueType() == MVT::i16)
6559 LHS = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, LHS);
6561 // If the operand types disagree, extend the shift amount to match. Since
6562 // BT ignores high bits (like shifts) we can use anyextend.
6563 if (LHS.getValueType() != RHS.getValueType())
6564 RHS = DAG.getNode(ISD::ANY_EXTEND, dl, LHS.getValueType(), RHS);
6566 SDValue BT = DAG.getNode(X86ISD::BT, dl, MVT::i32, LHS, RHS);
6567 unsigned Cond = CC == ISD::SETEQ ? X86::COND_AE : X86::COND_B;
6568 return DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
6569 DAG.getConstant(Cond, MVT::i8), BT);
6575 SDValue X86TargetLowering::LowerSETCC(SDValue Op, SelectionDAG &DAG) const {
6576 assert(Op.getValueType() == MVT::i8 && "SetCC type must be 8-bit integer");
6577 SDValue Op0 = Op.getOperand(0);
6578 SDValue Op1 = Op.getOperand(1);
6579 DebugLoc dl = Op.getDebugLoc();
6580 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(2))->get();
6582 // Optimize to BT if possible.
6583 // Lower (X & (1 << N)) == 0 to BT(X, N).
6584 // Lower ((X >>u N) & 1) != 0 to BT(X, N).
6585 // Lower ((X >>s N) & 1) != 0 to BT(X, N).
6586 if (Op0.getOpcode() == ISD::AND &&
6588 Op1.getOpcode() == ISD::Constant &&
6589 cast<ConstantSDNode>(Op1)->isNullValue() &&
6590 (CC == ISD::SETEQ || CC == ISD::SETNE)) {
6591 SDValue NewSetCC = LowerToBT(Op0, CC, dl, DAG);
6592 if (NewSetCC.getNode())
6596 // Look for "(setcc) == / != 1" to avoid unncessary setcc.
6597 if (Op0.getOpcode() == X86ISD::SETCC &&
6598 Op1.getOpcode() == ISD::Constant &&
6599 (cast<ConstantSDNode>(Op1)->getZExtValue() == 1 ||
6600 cast<ConstantSDNode>(Op1)->isNullValue()) &&
6601 (CC == ISD::SETEQ || CC == ISD::SETNE)) {
6602 X86::CondCode CCode = (X86::CondCode)Op0.getConstantOperandVal(0);
6603 bool Invert = (CC == ISD::SETNE) ^
6604 cast<ConstantSDNode>(Op1)->isNullValue();
6606 CCode = X86::GetOppositeBranchCondition(CCode);
6607 return DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
6608 DAG.getConstant(CCode, MVT::i8), Op0.getOperand(1));
6611 bool isFP = Op1.getValueType().isFloatingPoint();
6612 unsigned X86CC = TranslateX86CC(CC, isFP, Op0, Op1, DAG);
6613 if (X86CC == X86::COND_INVALID)
6616 SDValue Cond = EmitCmp(Op0, Op1, X86CC, DAG);
6618 // Use sbb x, x to materialize carry bit into a GPR.
6619 if (X86CC == X86::COND_B)
6620 return DAG.getNode(ISD::AND, dl, MVT::i8,
6621 DAG.getNode(X86ISD::SETCC_CARRY, dl, MVT::i8,
6622 DAG.getConstant(X86CC, MVT::i8), Cond),
6623 DAG.getConstant(1, MVT::i8));
6625 return DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
6626 DAG.getConstant(X86CC, MVT::i8), Cond);
6629 SDValue X86TargetLowering::LowerVSETCC(SDValue Op, SelectionDAG &DAG) const {
6631 SDValue Op0 = Op.getOperand(0);
6632 SDValue Op1 = Op.getOperand(1);
6633 SDValue CC = Op.getOperand(2);
6634 EVT VT = Op.getValueType();
6635 ISD::CondCode SetCCOpcode = cast<CondCodeSDNode>(CC)->get();
6636 bool isFP = Op.getOperand(1).getValueType().isFloatingPoint();
6637 DebugLoc dl = Op.getDebugLoc();
6641 EVT VT0 = Op0.getValueType();
6642 assert(VT0 == MVT::v4f32 || VT0 == MVT::v2f64);
6643 unsigned Opc = VT0 == MVT::v4f32 ? X86ISD::CMPPS : X86ISD::CMPPD;
6646 switch (SetCCOpcode) {
6649 case ISD::SETEQ: SSECC = 0; break;
6651 case ISD::SETGT: Swap = true; // Fallthrough
6653 case ISD::SETOLT: SSECC = 1; break;
6655 case ISD::SETGE: Swap = true; // Fallthrough
6657 case ISD::SETOLE: SSECC = 2; break;
6658 case ISD::SETUO: SSECC = 3; break;
6660 case ISD::SETNE: SSECC = 4; break;
6661 case ISD::SETULE: Swap = true;
6662 case ISD::SETUGE: SSECC = 5; break;
6663 case ISD::SETULT: Swap = true;
6664 case ISD::SETUGT: SSECC = 6; break;
6665 case ISD::SETO: SSECC = 7; break;
6668 std::swap(Op0, Op1);
6670 // In the two special cases we can't handle, emit two comparisons.
6672 if (SetCCOpcode == ISD::SETUEQ) {
6674 UNORD = DAG.getNode(Opc, dl, VT, Op0, Op1, DAG.getConstant(3, MVT::i8));
6675 EQ = DAG.getNode(Opc, dl, VT, Op0, Op1, DAG.getConstant(0, MVT::i8));
6676 return DAG.getNode(ISD::OR, dl, VT, UNORD, EQ);
6678 else if (SetCCOpcode == ISD::SETONE) {
6680 ORD = DAG.getNode(Opc, dl, VT, Op0, Op1, DAG.getConstant(7, MVT::i8));
6681 NEQ = DAG.getNode(Opc, dl, VT, Op0, Op1, DAG.getConstant(4, MVT::i8));
6682 return DAG.getNode(ISD::AND, dl, VT, ORD, NEQ);
6684 llvm_unreachable("Illegal FP comparison");
6686 // Handle all other FP comparisons here.
6687 return DAG.getNode(Opc, dl, VT, Op0, Op1, DAG.getConstant(SSECC, MVT::i8));
6690 // We are handling one of the integer comparisons here. Since SSE only has
6691 // GT and EQ comparisons for integer, swapping operands and multiple
6692 // operations may be required for some comparisons.
6693 unsigned Opc = 0, EQOpc = 0, GTOpc = 0;
6694 bool Swap = false, Invert = false, FlipSigns = false;
6696 switch (VT.getSimpleVT().SimpleTy) {
6699 case MVT::v16i8: EQOpc = X86ISD::PCMPEQB; GTOpc = X86ISD::PCMPGTB; break;
6701 case MVT::v8i16: EQOpc = X86ISD::PCMPEQW; GTOpc = X86ISD::PCMPGTW; break;
6703 case MVT::v4i32: EQOpc = X86ISD::PCMPEQD; GTOpc = X86ISD::PCMPGTD; break;
6704 case MVT::v2i64: EQOpc = X86ISD::PCMPEQQ; GTOpc = X86ISD::PCMPGTQ; break;
6707 switch (SetCCOpcode) {
6709 case ISD::SETNE: Invert = true;
6710 case ISD::SETEQ: Opc = EQOpc; break;
6711 case ISD::SETLT: Swap = true;
6712 case ISD::SETGT: Opc = GTOpc; break;
6713 case ISD::SETGE: Swap = true;
6714 case ISD::SETLE: Opc = GTOpc; Invert = true; break;
6715 case ISD::SETULT: Swap = true;
6716 case ISD::SETUGT: Opc = GTOpc; FlipSigns = true; break;
6717 case ISD::SETUGE: Swap = true;
6718 case ISD::SETULE: Opc = GTOpc; FlipSigns = true; Invert = true; break;
6721 std::swap(Op0, Op1);
6723 // Since SSE has no unsigned integer comparisons, we need to flip the sign
6724 // bits of the inputs before performing those operations.
6726 EVT EltVT = VT.getVectorElementType();
6727 SDValue SignBit = DAG.getConstant(APInt::getSignBit(EltVT.getSizeInBits()),
6729 std::vector<SDValue> SignBits(VT.getVectorNumElements(), SignBit);
6730 SDValue SignVec = DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &SignBits[0],
6732 Op0 = DAG.getNode(ISD::XOR, dl, VT, Op0, SignVec);
6733 Op1 = DAG.getNode(ISD::XOR, dl, VT, Op1, SignVec);
6736 SDValue Result = DAG.getNode(Opc, dl, VT, Op0, Op1);
6738 // If the logical-not of the result is required, perform that now.
6740 Result = DAG.getNOT(dl, Result, VT);
6745 // isX86LogicalCmp - Return true if opcode is a X86 logical comparison.
6746 static bool isX86LogicalCmp(SDValue Op) {
6747 unsigned Opc = Op.getNode()->getOpcode();
6748 if (Opc == X86ISD::CMP || Opc == X86ISD::COMI || Opc == X86ISD::UCOMI)
6750 if (Op.getResNo() == 1 &&
6751 (Opc == X86ISD::ADD ||
6752 Opc == X86ISD::SUB ||
6753 Opc == X86ISD::SMUL ||
6754 Opc == X86ISD::UMUL ||
6755 Opc == X86ISD::INC ||
6756 Opc == X86ISD::DEC ||
6757 Opc == X86ISD::OR ||
6758 Opc == X86ISD::XOR ||
6759 Opc == X86ISD::AND))
6765 SDValue X86TargetLowering::LowerSELECT(SDValue Op, SelectionDAG &DAG) const {
6766 bool addTest = true;
6767 SDValue Cond = Op.getOperand(0);
6768 DebugLoc dl = Op.getDebugLoc();
6771 if (Cond.getOpcode() == ISD::SETCC) {
6772 SDValue NewCond = LowerSETCC(Cond, DAG);
6773 if (NewCond.getNode())
6777 // (select (x == 0), -1, 0) -> (sign_bit (x - 1))
6778 SDValue Op1 = Op.getOperand(1);
6779 SDValue Op2 = Op.getOperand(2);
6780 if (Cond.getOpcode() == X86ISD::SETCC &&
6781 cast<ConstantSDNode>(Cond.getOperand(0))->getZExtValue() == X86::COND_E) {
6782 SDValue Cmp = Cond.getOperand(1);
6783 if (Cmp.getOpcode() == X86ISD::CMP) {
6784 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(Op1);
6785 ConstantSDNode *N2C = dyn_cast<ConstantSDNode>(Op2);
6786 ConstantSDNode *RHSC =
6787 dyn_cast<ConstantSDNode>(Cmp.getOperand(1).getNode());
6788 if (N1C && N1C->isAllOnesValue() &&
6789 N2C && N2C->isNullValue() &&
6790 RHSC && RHSC->isNullValue()) {
6791 SDValue CmpOp0 = Cmp.getOperand(0);
6792 Cmp = DAG.getNode(X86ISD::CMP, dl, MVT::i32,
6793 CmpOp0, DAG.getConstant(1, CmpOp0.getValueType()));
6794 return DAG.getNode(X86ISD::SETCC_CARRY, dl, Op.getValueType(),
6795 DAG.getConstant(X86::COND_B, MVT::i8), Cmp);
6800 // Look pass (and (setcc_carry (cmp ...)), 1).
6801 if (Cond.getOpcode() == ISD::AND &&
6802 Cond.getOperand(0).getOpcode() == X86ISD::SETCC_CARRY) {
6803 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Cond.getOperand(1));
6804 if (C && C->getAPIntValue() == 1)
6805 Cond = Cond.getOperand(0);
6808 // If condition flag is set by a X86ISD::CMP, then use it as the condition
6809 // setting operand in place of the X86ISD::SETCC.
6810 if (Cond.getOpcode() == X86ISD::SETCC ||
6811 Cond.getOpcode() == X86ISD::SETCC_CARRY) {
6812 CC = Cond.getOperand(0);
6814 SDValue Cmp = Cond.getOperand(1);
6815 unsigned Opc = Cmp.getOpcode();
6816 EVT VT = Op.getValueType();
6818 bool IllegalFPCMov = false;
6819 if (VT.isFloatingPoint() && !VT.isVector() &&
6820 !isScalarFPTypeInSSEReg(VT)) // FPStack?
6821 IllegalFPCMov = !hasFPCMov(cast<ConstantSDNode>(CC)->getSExtValue());
6823 if ((isX86LogicalCmp(Cmp) && !IllegalFPCMov) ||
6824 Opc == X86ISD::BT) { // FIXME
6831 // Look pass the truncate.
6832 if (Cond.getOpcode() == ISD::TRUNCATE)
6833 Cond = Cond.getOperand(0);
6835 // We know the result of AND is compared against zero. Try to match
6837 if (Cond.getOpcode() == ISD::AND && Cond.hasOneUse()) {
6838 SDValue NewSetCC = LowerToBT(Cond, ISD::SETNE, dl, DAG);
6839 if (NewSetCC.getNode()) {
6840 CC = NewSetCC.getOperand(0);
6841 Cond = NewSetCC.getOperand(1);
6848 CC = DAG.getConstant(X86::COND_NE, MVT::i8);
6849 Cond = EmitTest(Cond, X86::COND_NE, DAG);
6852 // X86ISD::CMOV means set the result (which is operand 1) to the RHS if
6853 // condition is true.
6854 SDVTList VTs = DAG.getVTList(Op.getValueType(), MVT::Flag);
6855 SDValue Ops[] = { Op2, Op1, CC, Cond };
6856 return DAG.getNode(X86ISD::CMOV, dl, VTs, Ops, array_lengthof(Ops));
6859 // isAndOrOfSingleUseSetCCs - Return true if node is an ISD::AND or
6860 // ISD::OR of two X86ISD::SETCC nodes each of which has no other use apart
6861 // from the AND / OR.
6862 static bool isAndOrOfSetCCs(SDValue Op, unsigned &Opc) {
6863 Opc = Op.getOpcode();
6864 if (Opc != ISD::OR && Opc != ISD::AND)
6866 return (Op.getOperand(0).getOpcode() == X86ISD::SETCC &&
6867 Op.getOperand(0).hasOneUse() &&
6868 Op.getOperand(1).getOpcode() == X86ISD::SETCC &&
6869 Op.getOperand(1).hasOneUse());
6872 // isXor1OfSetCC - Return true if node is an ISD::XOR of a X86ISD::SETCC and
6873 // 1 and that the SETCC node has a single use.
6874 static bool isXor1OfSetCC(SDValue Op) {
6875 if (Op.getOpcode() != ISD::XOR)
6877 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(Op.getOperand(1));
6878 if (N1C && N1C->getAPIntValue() == 1) {
6879 return Op.getOperand(0).getOpcode() == X86ISD::SETCC &&
6880 Op.getOperand(0).hasOneUse();
6885 SDValue X86TargetLowering::LowerBRCOND(SDValue Op, SelectionDAG &DAG) const {
6886 bool addTest = true;
6887 SDValue Chain = Op.getOperand(0);
6888 SDValue Cond = Op.getOperand(1);
6889 SDValue Dest = Op.getOperand(2);
6890 DebugLoc dl = Op.getDebugLoc();
6893 if (Cond.getOpcode() == ISD::SETCC) {
6894 SDValue NewCond = LowerSETCC(Cond, DAG);
6895 if (NewCond.getNode())
6899 // FIXME: LowerXALUO doesn't handle these!!
6900 else if (Cond.getOpcode() == X86ISD::ADD ||
6901 Cond.getOpcode() == X86ISD::SUB ||
6902 Cond.getOpcode() == X86ISD::SMUL ||
6903 Cond.getOpcode() == X86ISD::UMUL)
6904 Cond = LowerXALUO(Cond, DAG);
6907 // Look pass (and (setcc_carry (cmp ...)), 1).
6908 if (Cond.getOpcode() == ISD::AND &&
6909 Cond.getOperand(0).getOpcode() == X86ISD::SETCC_CARRY) {
6910 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Cond.getOperand(1));
6911 if (C && C->getAPIntValue() == 1)
6912 Cond = Cond.getOperand(0);
6915 // If condition flag is set by a X86ISD::CMP, then use it as the condition
6916 // setting operand in place of the X86ISD::SETCC.
6917 if (Cond.getOpcode() == X86ISD::SETCC ||
6918 Cond.getOpcode() == X86ISD::SETCC_CARRY) {
6919 CC = Cond.getOperand(0);
6921 SDValue Cmp = Cond.getOperand(1);
6922 unsigned Opc = Cmp.getOpcode();
6923 // FIXME: WHY THE SPECIAL CASING OF LogicalCmp??
6924 if (isX86LogicalCmp(Cmp) || Opc == X86ISD::BT) {
6928 switch (cast<ConstantSDNode>(CC)->getZExtValue()) {
6932 // These can only come from an arithmetic instruction with overflow,
6933 // e.g. SADDO, UADDO.
6934 Cond = Cond.getNode()->getOperand(1);
6941 if (Cond.hasOneUse() && isAndOrOfSetCCs(Cond, CondOpc)) {
6942 SDValue Cmp = Cond.getOperand(0).getOperand(1);
6943 if (CondOpc == ISD::OR) {
6944 // Also, recognize the pattern generated by an FCMP_UNE. We can emit
6945 // two branches instead of an explicit OR instruction with a
6947 if (Cmp == Cond.getOperand(1).getOperand(1) &&
6948 isX86LogicalCmp(Cmp)) {
6949 CC = Cond.getOperand(0).getOperand(0);
6950 Chain = DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
6951 Chain, Dest, CC, Cmp);
6952 CC = Cond.getOperand(1).getOperand(0);
6956 } else { // ISD::AND
6957 // Also, recognize the pattern generated by an FCMP_OEQ. We can emit
6958 // two branches instead of an explicit AND instruction with a
6959 // separate test. However, we only do this if this block doesn't
6960 // have a fall-through edge, because this requires an explicit
6961 // jmp when the condition is false.
6962 if (Cmp == Cond.getOperand(1).getOperand(1) &&
6963 isX86LogicalCmp(Cmp) &&
6964 Op.getNode()->hasOneUse()) {
6965 X86::CondCode CCode =
6966 (X86::CondCode)Cond.getOperand(0).getConstantOperandVal(0);
6967 CCode = X86::GetOppositeBranchCondition(CCode);
6968 CC = DAG.getConstant(CCode, MVT::i8);
6969 SDNode *User = *Op.getNode()->use_begin();
6970 // Look for an unconditional branch following this conditional branch.
6971 // We need this because we need to reverse the successors in order
6972 // to implement FCMP_OEQ.
6973 if (User->getOpcode() == ISD::BR) {
6974 SDValue FalseBB = User->getOperand(1);
6976 DAG.UpdateNodeOperands(User, User->getOperand(0), Dest);
6977 assert(NewBR == User);
6981 Chain = DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
6982 Chain, Dest, CC, Cmp);
6983 X86::CondCode CCode =
6984 (X86::CondCode)Cond.getOperand(1).getConstantOperandVal(0);
6985 CCode = X86::GetOppositeBranchCondition(CCode);
6986 CC = DAG.getConstant(CCode, MVT::i8);
6992 } else if (Cond.hasOneUse() && isXor1OfSetCC(Cond)) {
6993 // Recognize for xorb (setcc), 1 patterns. The xor inverts the condition.
6994 // It should be transformed during dag combiner except when the condition
6995 // is set by a arithmetics with overflow node.
6996 X86::CondCode CCode =
6997 (X86::CondCode)Cond.getOperand(0).getConstantOperandVal(0);
6998 CCode = X86::GetOppositeBranchCondition(CCode);
6999 CC = DAG.getConstant(CCode, MVT::i8);
7000 Cond = Cond.getOperand(0).getOperand(1);
7006 // Look pass the truncate.
7007 if (Cond.getOpcode() == ISD::TRUNCATE)
7008 Cond = Cond.getOperand(0);
7010 // We know the result of AND is compared against zero. Try to match
7012 if (Cond.getOpcode() == ISD::AND && Cond.hasOneUse()) {
7013 SDValue NewSetCC = LowerToBT(Cond, ISD::SETNE, dl, DAG);
7014 if (NewSetCC.getNode()) {
7015 CC = NewSetCC.getOperand(0);
7016 Cond = NewSetCC.getOperand(1);
7023 CC = DAG.getConstant(X86::COND_NE, MVT::i8);
7024 Cond = EmitTest(Cond, X86::COND_NE, DAG);
7026 return DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
7027 Chain, Dest, CC, Cond);
7031 // Lower dynamic stack allocation to _alloca call for Cygwin/Mingw targets.
7032 // Calls to _alloca is needed to probe the stack when allocating more than 4k
7033 // bytes in one go. Touching the stack at 4K increments is necessary to ensure
7034 // that the guard pages used by the OS virtual memory manager are allocated in
7035 // correct sequence.
7037 X86TargetLowering::LowerDYNAMIC_STACKALLOC(SDValue Op,
7038 SelectionDAG &DAG) const {
7039 assert(Subtarget->isTargetCygMing() &&
7040 "This should be used only on Cygwin/Mingw targets");
7041 DebugLoc dl = Op.getDebugLoc();
7044 SDValue Chain = Op.getOperand(0);
7045 SDValue Size = Op.getOperand(1);
7046 // FIXME: Ensure alignment here
7050 EVT SPTy = Subtarget->is64Bit() ? MVT::i64 : MVT::i32;
7052 Chain = DAG.getCopyToReg(Chain, dl, X86::EAX, Size, Flag);
7053 Flag = Chain.getValue(1);
7055 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Flag);
7057 Chain = DAG.getNode(X86ISD::MINGW_ALLOCA, dl, NodeTys, Chain, Flag);
7058 Flag = Chain.getValue(1);
7060 Chain = DAG.getCopyFromReg(Chain, dl, X86StackPtr, SPTy).getValue(1);
7062 SDValue Ops1[2] = { Chain.getValue(0), Chain };
7063 return DAG.getMergeValues(Ops1, 2, dl);
7066 SDValue X86TargetLowering::LowerVASTART(SDValue Op, SelectionDAG &DAG) const {
7067 MachineFunction &MF = DAG.getMachineFunction();
7068 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
7070 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
7071 DebugLoc dl = Op.getDebugLoc();
7073 if (!Subtarget->is64Bit()) {
7074 // vastart just stores the address of the VarArgsFrameIndex slot into the
7075 // memory location argument.
7076 SDValue FR = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(),
7078 return DAG.getStore(Op.getOperand(0), dl, FR, Op.getOperand(1), SV, 0,
7083 // gp_offset (0 - 6 * 8)
7084 // fp_offset (48 - 48 + 8 * 16)
7085 // overflow_arg_area (point to parameters coming in memory).
7087 SmallVector<SDValue, 8> MemOps;
7088 SDValue FIN = Op.getOperand(1);
7090 SDValue Store = DAG.getStore(Op.getOperand(0), dl,
7091 DAG.getConstant(FuncInfo->getVarArgsGPOffset(),
7093 FIN, SV, 0, false, false, 0);
7094 MemOps.push_back(Store);
7097 FIN = DAG.getNode(ISD::ADD, dl, getPointerTy(),
7098 FIN, DAG.getIntPtrConstant(4));
7099 Store = DAG.getStore(Op.getOperand(0), dl,
7100 DAG.getConstant(FuncInfo->getVarArgsFPOffset(),
7102 FIN, SV, 4, false, false, 0);
7103 MemOps.push_back(Store);
7105 // Store ptr to overflow_arg_area
7106 FIN = DAG.getNode(ISD::ADD, dl, getPointerTy(),
7107 FIN, DAG.getIntPtrConstant(4));
7108 SDValue OVFIN = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(),
7110 Store = DAG.getStore(Op.getOperand(0), dl, OVFIN, FIN, SV, 8,
7112 MemOps.push_back(Store);
7114 // Store ptr to reg_save_area.
7115 FIN = DAG.getNode(ISD::ADD, dl, getPointerTy(),
7116 FIN, DAG.getIntPtrConstant(8));
7117 SDValue RSFIN = DAG.getFrameIndex(FuncInfo->getRegSaveFrameIndex(),
7119 Store = DAG.getStore(Op.getOperand(0), dl, RSFIN, FIN, SV, 16,
7121 MemOps.push_back(Store);
7122 return DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
7123 &MemOps[0], MemOps.size());
7126 SDValue X86TargetLowering::LowerVAARG(SDValue Op, SelectionDAG &DAG) const {
7127 // X86-64 va_list is a struct { i32, i32, i8*, i8* }.
7128 assert(Subtarget->is64Bit() && "This code only handles 64-bit va_arg!");
7130 report_fatal_error("VAArgInst is not yet implemented for x86-64!");
7134 SDValue X86TargetLowering::LowerVACOPY(SDValue Op, SelectionDAG &DAG) const {
7135 // X86-64 va_list is a struct { i32, i32, i8*, i8* }.
7136 assert(Subtarget->is64Bit() && "This code only handles 64-bit va_copy!");
7137 SDValue Chain = Op.getOperand(0);
7138 SDValue DstPtr = Op.getOperand(1);
7139 SDValue SrcPtr = Op.getOperand(2);
7140 const Value *DstSV = cast<SrcValueSDNode>(Op.getOperand(3))->getValue();
7141 const Value *SrcSV = cast<SrcValueSDNode>(Op.getOperand(4))->getValue();
7142 DebugLoc dl = Op.getDebugLoc();
7144 return DAG.getMemcpy(Chain, dl, DstPtr, SrcPtr,
7145 DAG.getIntPtrConstant(24), 8, /*isVolatile*/false,
7146 false, DstSV, 0, SrcSV, 0);
7150 X86TargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) const {
7151 DebugLoc dl = Op.getDebugLoc();
7152 unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
7154 default: return SDValue(); // Don't custom lower most intrinsics.
7155 // Comparison intrinsics.
7156 case Intrinsic::x86_sse_comieq_ss:
7157 case Intrinsic::x86_sse_comilt_ss:
7158 case Intrinsic::x86_sse_comile_ss:
7159 case Intrinsic::x86_sse_comigt_ss:
7160 case Intrinsic::x86_sse_comige_ss:
7161 case Intrinsic::x86_sse_comineq_ss:
7162 case Intrinsic::x86_sse_ucomieq_ss:
7163 case Intrinsic::x86_sse_ucomilt_ss:
7164 case Intrinsic::x86_sse_ucomile_ss:
7165 case Intrinsic::x86_sse_ucomigt_ss:
7166 case Intrinsic::x86_sse_ucomige_ss:
7167 case Intrinsic::x86_sse_ucomineq_ss:
7168 case Intrinsic::x86_sse2_comieq_sd:
7169 case Intrinsic::x86_sse2_comilt_sd:
7170 case Intrinsic::x86_sse2_comile_sd:
7171 case Intrinsic::x86_sse2_comigt_sd:
7172 case Intrinsic::x86_sse2_comige_sd:
7173 case Intrinsic::x86_sse2_comineq_sd:
7174 case Intrinsic::x86_sse2_ucomieq_sd:
7175 case Intrinsic::x86_sse2_ucomilt_sd:
7176 case Intrinsic::x86_sse2_ucomile_sd:
7177 case Intrinsic::x86_sse2_ucomigt_sd:
7178 case Intrinsic::x86_sse2_ucomige_sd:
7179 case Intrinsic::x86_sse2_ucomineq_sd: {
7181 ISD::CondCode CC = ISD::SETCC_INVALID;
7184 case Intrinsic::x86_sse_comieq_ss:
7185 case Intrinsic::x86_sse2_comieq_sd:
7189 case Intrinsic::x86_sse_comilt_ss:
7190 case Intrinsic::x86_sse2_comilt_sd:
7194 case Intrinsic::x86_sse_comile_ss:
7195 case Intrinsic::x86_sse2_comile_sd:
7199 case Intrinsic::x86_sse_comigt_ss:
7200 case Intrinsic::x86_sse2_comigt_sd:
7204 case Intrinsic::x86_sse_comige_ss:
7205 case Intrinsic::x86_sse2_comige_sd:
7209 case Intrinsic::x86_sse_comineq_ss:
7210 case Intrinsic::x86_sse2_comineq_sd:
7214 case Intrinsic::x86_sse_ucomieq_ss:
7215 case Intrinsic::x86_sse2_ucomieq_sd:
7216 Opc = X86ISD::UCOMI;
7219 case Intrinsic::x86_sse_ucomilt_ss:
7220 case Intrinsic::x86_sse2_ucomilt_sd:
7221 Opc = X86ISD::UCOMI;
7224 case Intrinsic::x86_sse_ucomile_ss:
7225 case Intrinsic::x86_sse2_ucomile_sd:
7226 Opc = X86ISD::UCOMI;
7229 case Intrinsic::x86_sse_ucomigt_ss:
7230 case Intrinsic::x86_sse2_ucomigt_sd:
7231 Opc = X86ISD::UCOMI;
7234 case Intrinsic::x86_sse_ucomige_ss:
7235 case Intrinsic::x86_sse2_ucomige_sd:
7236 Opc = X86ISD::UCOMI;
7239 case Intrinsic::x86_sse_ucomineq_ss:
7240 case Intrinsic::x86_sse2_ucomineq_sd:
7241 Opc = X86ISD::UCOMI;
7246 SDValue LHS = Op.getOperand(1);
7247 SDValue RHS = Op.getOperand(2);
7248 unsigned X86CC = TranslateX86CC(CC, true, LHS, RHS, DAG);
7249 assert(X86CC != X86::COND_INVALID && "Unexpected illegal condition!");
7250 SDValue Cond = DAG.getNode(Opc, dl, MVT::i32, LHS, RHS);
7251 SDValue SetCC = DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
7252 DAG.getConstant(X86CC, MVT::i8), Cond);
7253 return DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, SetCC);
7255 // ptest and testp intrinsics. The intrinsic these come from are designed to
7256 // return an integer value, not just an instruction so lower it to the ptest
7257 // or testp pattern and a setcc for the result.
7258 case Intrinsic::x86_sse41_ptestz:
7259 case Intrinsic::x86_sse41_ptestc:
7260 case Intrinsic::x86_sse41_ptestnzc:
7261 case Intrinsic::x86_avx_ptestz_256:
7262 case Intrinsic::x86_avx_ptestc_256:
7263 case Intrinsic::x86_avx_ptestnzc_256:
7264 case Intrinsic::x86_avx_vtestz_ps:
7265 case Intrinsic::x86_avx_vtestc_ps:
7266 case Intrinsic::x86_avx_vtestnzc_ps:
7267 case Intrinsic::x86_avx_vtestz_pd:
7268 case Intrinsic::x86_avx_vtestc_pd:
7269 case Intrinsic::x86_avx_vtestnzc_pd:
7270 case Intrinsic::x86_avx_vtestz_ps_256:
7271 case Intrinsic::x86_avx_vtestc_ps_256:
7272 case Intrinsic::x86_avx_vtestnzc_ps_256:
7273 case Intrinsic::x86_avx_vtestz_pd_256:
7274 case Intrinsic::x86_avx_vtestc_pd_256:
7275 case Intrinsic::x86_avx_vtestnzc_pd_256: {
7276 bool IsTestPacked = false;
7279 default: llvm_unreachable("Bad fallthrough in Intrinsic lowering.");
7280 case Intrinsic::x86_avx_vtestz_ps:
7281 case Intrinsic::x86_avx_vtestz_pd:
7282 case Intrinsic::x86_avx_vtestz_ps_256:
7283 case Intrinsic::x86_avx_vtestz_pd_256:
7284 IsTestPacked = true; // Fallthrough
7285 case Intrinsic::x86_sse41_ptestz:
7286 case Intrinsic::x86_avx_ptestz_256:
7288 X86CC = X86::COND_E;
7290 case Intrinsic::x86_avx_vtestc_ps:
7291 case Intrinsic::x86_avx_vtestc_pd:
7292 case Intrinsic::x86_avx_vtestc_ps_256:
7293 case Intrinsic::x86_avx_vtestc_pd_256:
7294 IsTestPacked = true; // Fallthrough
7295 case Intrinsic::x86_sse41_ptestc:
7296 case Intrinsic::x86_avx_ptestc_256:
7298 X86CC = X86::COND_B;
7300 case Intrinsic::x86_avx_vtestnzc_ps:
7301 case Intrinsic::x86_avx_vtestnzc_pd:
7302 case Intrinsic::x86_avx_vtestnzc_ps_256:
7303 case Intrinsic::x86_avx_vtestnzc_pd_256:
7304 IsTestPacked = true; // Fallthrough
7305 case Intrinsic::x86_sse41_ptestnzc:
7306 case Intrinsic::x86_avx_ptestnzc_256:
7308 X86CC = X86::COND_A;
7312 SDValue LHS = Op.getOperand(1);
7313 SDValue RHS = Op.getOperand(2);
7314 unsigned TestOpc = IsTestPacked ? X86ISD::TESTP : X86ISD::PTEST;
7315 SDValue Test = DAG.getNode(TestOpc, dl, MVT::i32, LHS, RHS);
7316 SDValue CC = DAG.getConstant(X86CC, MVT::i8);
7317 SDValue SetCC = DAG.getNode(X86ISD::SETCC, dl, MVT::i8, CC, Test);
7318 return DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, SetCC);
7321 // Fix vector shift instructions where the last operand is a non-immediate
7323 case Intrinsic::x86_sse2_pslli_w:
7324 case Intrinsic::x86_sse2_pslli_d:
7325 case Intrinsic::x86_sse2_pslli_q:
7326 case Intrinsic::x86_sse2_psrli_w:
7327 case Intrinsic::x86_sse2_psrli_d:
7328 case Intrinsic::x86_sse2_psrli_q:
7329 case Intrinsic::x86_sse2_psrai_w:
7330 case Intrinsic::x86_sse2_psrai_d:
7331 case Intrinsic::x86_mmx_pslli_w:
7332 case Intrinsic::x86_mmx_pslli_d:
7333 case Intrinsic::x86_mmx_pslli_q:
7334 case Intrinsic::x86_mmx_psrli_w:
7335 case Intrinsic::x86_mmx_psrli_d:
7336 case Intrinsic::x86_mmx_psrli_q:
7337 case Intrinsic::x86_mmx_psrai_w:
7338 case Intrinsic::x86_mmx_psrai_d: {
7339 SDValue ShAmt = Op.getOperand(2);
7340 if (isa<ConstantSDNode>(ShAmt))
7343 unsigned NewIntNo = 0;
7344 EVT ShAmtVT = MVT::v4i32;
7346 case Intrinsic::x86_sse2_pslli_w:
7347 NewIntNo = Intrinsic::x86_sse2_psll_w;
7349 case Intrinsic::x86_sse2_pslli_d:
7350 NewIntNo = Intrinsic::x86_sse2_psll_d;
7352 case Intrinsic::x86_sse2_pslli_q:
7353 NewIntNo = Intrinsic::x86_sse2_psll_q;
7355 case Intrinsic::x86_sse2_psrli_w:
7356 NewIntNo = Intrinsic::x86_sse2_psrl_w;
7358 case Intrinsic::x86_sse2_psrli_d:
7359 NewIntNo = Intrinsic::x86_sse2_psrl_d;
7361 case Intrinsic::x86_sse2_psrli_q:
7362 NewIntNo = Intrinsic::x86_sse2_psrl_q;
7364 case Intrinsic::x86_sse2_psrai_w:
7365 NewIntNo = Intrinsic::x86_sse2_psra_w;
7367 case Intrinsic::x86_sse2_psrai_d:
7368 NewIntNo = Intrinsic::x86_sse2_psra_d;
7371 ShAmtVT = MVT::v2i32;
7373 case Intrinsic::x86_mmx_pslli_w:
7374 NewIntNo = Intrinsic::x86_mmx_psll_w;
7376 case Intrinsic::x86_mmx_pslli_d:
7377 NewIntNo = Intrinsic::x86_mmx_psll_d;
7379 case Intrinsic::x86_mmx_pslli_q:
7380 NewIntNo = Intrinsic::x86_mmx_psll_q;
7382 case Intrinsic::x86_mmx_psrli_w:
7383 NewIntNo = Intrinsic::x86_mmx_psrl_w;
7385 case Intrinsic::x86_mmx_psrli_d:
7386 NewIntNo = Intrinsic::x86_mmx_psrl_d;
7388 case Intrinsic::x86_mmx_psrli_q:
7389 NewIntNo = Intrinsic::x86_mmx_psrl_q;
7391 case Intrinsic::x86_mmx_psrai_w:
7392 NewIntNo = Intrinsic::x86_mmx_psra_w;
7394 case Intrinsic::x86_mmx_psrai_d:
7395 NewIntNo = Intrinsic::x86_mmx_psra_d;
7397 default: llvm_unreachable("Impossible intrinsic"); // Can't reach here.
7403 // The vector shift intrinsics with scalars uses 32b shift amounts but
7404 // the sse2/mmx shift instructions reads 64 bits. Set the upper 32 bits
7408 ShOps[1] = DAG.getConstant(0, MVT::i32);
7409 if (ShAmtVT == MVT::v4i32) {
7410 ShOps[2] = DAG.getUNDEF(MVT::i32);
7411 ShOps[3] = DAG.getUNDEF(MVT::i32);
7412 ShAmt = DAG.getNode(ISD::BUILD_VECTOR, dl, ShAmtVT, &ShOps[0], 4);
7414 ShAmt = DAG.getNode(ISD::BUILD_VECTOR, dl, ShAmtVT, &ShOps[0], 2);
7417 EVT VT = Op.getValueType();
7418 ShAmt = DAG.getNode(ISD::BIT_CONVERT, dl, VT, ShAmt);
7419 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
7420 DAG.getConstant(NewIntNo, MVT::i32),
7421 Op.getOperand(1), ShAmt);
7426 SDValue X86TargetLowering::LowerRETURNADDR(SDValue Op,
7427 SelectionDAG &DAG) const {
7428 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
7429 MFI->setReturnAddressIsTaken(true);
7431 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
7432 DebugLoc dl = Op.getDebugLoc();
7435 SDValue FrameAddr = LowerFRAMEADDR(Op, DAG);
7437 DAG.getConstant(TD->getPointerSize(),
7438 Subtarget->is64Bit() ? MVT::i64 : MVT::i32);
7439 return DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
7440 DAG.getNode(ISD::ADD, dl, getPointerTy(),
7442 NULL, 0, false, false, 0);
7445 // Just load the return address.
7446 SDValue RetAddrFI = getReturnAddressFrameIndex(DAG);
7447 return DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
7448 RetAddrFI, NULL, 0, false, false, 0);
7451 SDValue X86TargetLowering::LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const {
7452 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
7453 MFI->setFrameAddressIsTaken(true);
7455 EVT VT = Op.getValueType();
7456 DebugLoc dl = Op.getDebugLoc(); // FIXME probably not meaningful
7457 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
7458 unsigned FrameReg = Subtarget->is64Bit() ? X86::RBP : X86::EBP;
7459 SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, FrameReg, VT);
7461 FrameAddr = DAG.getLoad(VT, dl, DAG.getEntryNode(), FrameAddr, NULL, 0,
7466 SDValue X86TargetLowering::LowerFRAME_TO_ARGS_OFFSET(SDValue Op,
7467 SelectionDAG &DAG) const {
7468 return DAG.getIntPtrConstant(2*TD->getPointerSize());
7471 SDValue X86TargetLowering::LowerEH_RETURN(SDValue Op, SelectionDAG &DAG) const {
7472 MachineFunction &MF = DAG.getMachineFunction();
7473 SDValue Chain = Op.getOperand(0);
7474 SDValue Offset = Op.getOperand(1);
7475 SDValue Handler = Op.getOperand(2);
7476 DebugLoc dl = Op.getDebugLoc();
7478 SDValue Frame = DAG.getCopyFromReg(DAG.getEntryNode(), dl,
7479 Subtarget->is64Bit() ? X86::RBP : X86::EBP,
7481 unsigned StoreAddrReg = (Subtarget->is64Bit() ? X86::RCX : X86::ECX);
7483 SDValue StoreAddr = DAG.getNode(ISD::ADD, dl, getPointerTy(), Frame,
7484 DAG.getIntPtrConstant(TD->getPointerSize()));
7485 StoreAddr = DAG.getNode(ISD::ADD, dl, getPointerTy(), StoreAddr, Offset);
7486 Chain = DAG.getStore(Chain, dl, Handler, StoreAddr, NULL, 0, false, false, 0);
7487 Chain = DAG.getCopyToReg(Chain, dl, StoreAddrReg, StoreAddr);
7488 MF.getRegInfo().addLiveOut(StoreAddrReg);
7490 return DAG.getNode(X86ISD::EH_RETURN, dl,
7492 Chain, DAG.getRegister(StoreAddrReg, getPointerTy()));
7495 SDValue X86TargetLowering::LowerTRAMPOLINE(SDValue Op,
7496 SelectionDAG &DAG) const {
7497 SDValue Root = Op.getOperand(0);
7498 SDValue Trmp = Op.getOperand(1); // trampoline
7499 SDValue FPtr = Op.getOperand(2); // nested function
7500 SDValue Nest = Op.getOperand(3); // 'nest' parameter value
7501 DebugLoc dl = Op.getDebugLoc();
7503 const Value *TrmpAddr = cast<SrcValueSDNode>(Op.getOperand(4))->getValue();
7505 if (Subtarget->is64Bit()) {
7506 SDValue OutChains[6];
7508 // Large code-model.
7509 const unsigned char JMP64r = 0xFF; // 64-bit jmp through register opcode.
7510 const unsigned char MOV64ri = 0xB8; // X86::MOV64ri opcode.
7512 const unsigned char N86R10 = RegInfo->getX86RegNum(X86::R10);
7513 const unsigned char N86R11 = RegInfo->getX86RegNum(X86::R11);
7515 const unsigned char REX_WB = 0x40 | 0x08 | 0x01; // REX prefix
7517 // Load the pointer to the nested function into R11.
7518 unsigned OpCode = ((MOV64ri | N86R11) << 8) | REX_WB; // movabsq r11
7519 SDValue Addr = Trmp;
7520 OutChains[0] = DAG.getStore(Root, dl, DAG.getConstant(OpCode, MVT::i16),
7521 Addr, TrmpAddr, 0, false, false, 0);
7523 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
7524 DAG.getConstant(2, MVT::i64));
7525 OutChains[1] = DAG.getStore(Root, dl, FPtr, Addr, TrmpAddr, 2,
7528 // Load the 'nest' parameter value into R10.
7529 // R10 is specified in X86CallingConv.td
7530 OpCode = ((MOV64ri | N86R10) << 8) | REX_WB; // movabsq r10
7531 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
7532 DAG.getConstant(10, MVT::i64));
7533 OutChains[2] = DAG.getStore(Root, dl, DAG.getConstant(OpCode, MVT::i16),
7534 Addr, TrmpAddr, 10, false, false, 0);
7536 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
7537 DAG.getConstant(12, MVT::i64));
7538 OutChains[3] = DAG.getStore(Root, dl, Nest, Addr, TrmpAddr, 12,
7541 // Jump to the nested function.
7542 OpCode = (JMP64r << 8) | REX_WB; // jmpq *...
7543 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
7544 DAG.getConstant(20, MVT::i64));
7545 OutChains[4] = DAG.getStore(Root, dl, DAG.getConstant(OpCode, MVT::i16),
7546 Addr, TrmpAddr, 20, false, false, 0);
7548 unsigned char ModRM = N86R11 | (4 << 3) | (3 << 6); // ...r11
7549 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
7550 DAG.getConstant(22, MVT::i64));
7551 OutChains[5] = DAG.getStore(Root, dl, DAG.getConstant(ModRM, MVT::i8), Addr,
7552 TrmpAddr, 22, false, false, 0);
7555 { Trmp, DAG.getNode(ISD::TokenFactor, dl, MVT::Other, OutChains, 6) };
7556 return DAG.getMergeValues(Ops, 2, dl);
7558 const Function *Func =
7559 cast<Function>(cast<SrcValueSDNode>(Op.getOperand(5))->getValue());
7560 CallingConv::ID CC = Func->getCallingConv();
7565 llvm_unreachable("Unsupported calling convention");
7566 case CallingConv::C:
7567 case CallingConv::X86_StdCall: {
7568 // Pass 'nest' parameter in ECX.
7569 // Must be kept in sync with X86CallingConv.td
7572 // Check that ECX wasn't needed by an 'inreg' parameter.
7573 const FunctionType *FTy = Func->getFunctionType();
7574 const AttrListPtr &Attrs = Func->getAttributes();
7576 if (!Attrs.isEmpty() && !Func->isVarArg()) {
7577 unsigned InRegCount = 0;
7580 for (FunctionType::param_iterator I = FTy->param_begin(),
7581 E = FTy->param_end(); I != E; ++I, ++Idx)
7582 if (Attrs.paramHasAttr(Idx, Attribute::InReg))
7583 // FIXME: should only count parameters that are lowered to integers.
7584 InRegCount += (TD->getTypeSizeInBits(*I) + 31) / 32;
7586 if (InRegCount > 2) {
7587 report_fatal_error("Nest register in use - reduce number of inreg"
7593 case CallingConv::X86_FastCall:
7594 case CallingConv::X86_ThisCall:
7595 case CallingConv::Fast:
7596 // Pass 'nest' parameter in EAX.
7597 // Must be kept in sync with X86CallingConv.td
7602 SDValue OutChains[4];
7605 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
7606 DAG.getConstant(10, MVT::i32));
7607 Disp = DAG.getNode(ISD::SUB, dl, MVT::i32, FPtr, Addr);
7609 // This is storing the opcode for MOV32ri.
7610 const unsigned char MOV32ri = 0xB8; // X86::MOV32ri's opcode byte.
7611 const unsigned char N86Reg = RegInfo->getX86RegNum(NestReg);
7612 OutChains[0] = DAG.getStore(Root, dl,
7613 DAG.getConstant(MOV32ri|N86Reg, MVT::i8),
7614 Trmp, TrmpAddr, 0, false, false, 0);
7616 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
7617 DAG.getConstant(1, MVT::i32));
7618 OutChains[1] = DAG.getStore(Root, dl, Nest, Addr, TrmpAddr, 1,
7621 const unsigned char JMP = 0xE9; // jmp <32bit dst> opcode.
7622 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
7623 DAG.getConstant(5, MVT::i32));
7624 OutChains[2] = DAG.getStore(Root, dl, DAG.getConstant(JMP, MVT::i8), Addr,
7625 TrmpAddr, 5, false, false, 1);
7627 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
7628 DAG.getConstant(6, MVT::i32));
7629 OutChains[3] = DAG.getStore(Root, dl, Disp, Addr, TrmpAddr, 6,
7633 { Trmp, DAG.getNode(ISD::TokenFactor, dl, MVT::Other, OutChains, 4) };
7634 return DAG.getMergeValues(Ops, 2, dl);
7638 SDValue X86TargetLowering::LowerFLT_ROUNDS_(SDValue Op,
7639 SelectionDAG &DAG) const {
7641 The rounding mode is in bits 11:10 of FPSR, and has the following
7648 FLT_ROUNDS, on the other hand, expects the following:
7655 To perform the conversion, we do:
7656 (((((FPSR & 0x800) >> 11) | ((FPSR & 0x400) >> 9)) + 1) & 3)
7659 MachineFunction &MF = DAG.getMachineFunction();
7660 const TargetMachine &TM = MF.getTarget();
7661 const TargetFrameInfo &TFI = *TM.getFrameInfo();
7662 unsigned StackAlignment = TFI.getStackAlignment();
7663 EVT VT = Op.getValueType();
7664 DebugLoc dl = Op.getDebugLoc();
7666 // Save FP Control Word to stack slot
7667 int SSFI = MF.getFrameInfo()->CreateStackObject(2, StackAlignment, false);
7668 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
7670 SDValue Chain = DAG.getNode(X86ISD::FNSTCW16m, dl, MVT::Other,
7671 DAG.getEntryNode(), StackSlot);
7673 // Load FP Control Word from stack slot
7674 SDValue CWD = DAG.getLoad(MVT::i16, dl, Chain, StackSlot, NULL, 0,
7677 // Transform as necessary
7679 DAG.getNode(ISD::SRL, dl, MVT::i16,
7680 DAG.getNode(ISD::AND, dl, MVT::i16,
7681 CWD, DAG.getConstant(0x800, MVT::i16)),
7682 DAG.getConstant(11, MVT::i8));
7684 DAG.getNode(ISD::SRL, dl, MVT::i16,
7685 DAG.getNode(ISD::AND, dl, MVT::i16,
7686 CWD, DAG.getConstant(0x400, MVT::i16)),
7687 DAG.getConstant(9, MVT::i8));
7690 DAG.getNode(ISD::AND, dl, MVT::i16,
7691 DAG.getNode(ISD::ADD, dl, MVT::i16,
7692 DAG.getNode(ISD::OR, dl, MVT::i16, CWD1, CWD2),
7693 DAG.getConstant(1, MVT::i16)),
7694 DAG.getConstant(3, MVT::i16));
7697 return DAG.getNode((VT.getSizeInBits() < 16 ?
7698 ISD::TRUNCATE : ISD::ZERO_EXTEND), dl, VT, RetVal);
7701 SDValue X86TargetLowering::LowerCTLZ(SDValue Op, SelectionDAG &DAG) const {
7702 EVT VT = Op.getValueType();
7704 unsigned NumBits = VT.getSizeInBits();
7705 DebugLoc dl = Op.getDebugLoc();
7707 Op = Op.getOperand(0);
7708 if (VT == MVT::i8) {
7709 // Zero extend to i32 since there is not an i8 bsr.
7711 Op = DAG.getNode(ISD::ZERO_EXTEND, dl, OpVT, Op);
7714 // Issue a bsr (scan bits in reverse) which also sets EFLAGS.
7715 SDVTList VTs = DAG.getVTList(OpVT, MVT::i32);
7716 Op = DAG.getNode(X86ISD::BSR, dl, VTs, Op);
7718 // If src is zero (i.e. bsr sets ZF), returns NumBits.
7721 DAG.getConstant(NumBits+NumBits-1, OpVT),
7722 DAG.getConstant(X86::COND_E, MVT::i8),
7725 Op = DAG.getNode(X86ISD::CMOV, dl, OpVT, Ops, array_lengthof(Ops));
7727 // Finally xor with NumBits-1.
7728 Op = DAG.getNode(ISD::XOR, dl, OpVT, Op, DAG.getConstant(NumBits-1, OpVT));
7731 Op = DAG.getNode(ISD::TRUNCATE, dl, MVT::i8, Op);
7735 SDValue X86TargetLowering::LowerCTTZ(SDValue Op, SelectionDAG &DAG) const {
7736 EVT VT = Op.getValueType();
7738 unsigned NumBits = VT.getSizeInBits();
7739 DebugLoc dl = Op.getDebugLoc();
7741 Op = Op.getOperand(0);
7742 if (VT == MVT::i8) {
7744 Op = DAG.getNode(ISD::ZERO_EXTEND, dl, OpVT, Op);
7747 // Issue a bsf (scan bits forward) which also sets EFLAGS.
7748 SDVTList VTs = DAG.getVTList(OpVT, MVT::i32);
7749 Op = DAG.getNode(X86ISD::BSF, dl, VTs, Op);
7751 // If src is zero (i.e. bsf sets ZF), returns NumBits.
7754 DAG.getConstant(NumBits, OpVT),
7755 DAG.getConstant(X86::COND_E, MVT::i8),
7758 Op = DAG.getNode(X86ISD::CMOV, dl, OpVT, Ops, array_lengthof(Ops));
7761 Op = DAG.getNode(ISD::TRUNCATE, dl, MVT::i8, Op);
7765 SDValue X86TargetLowering::LowerMUL_V2I64(SDValue Op, SelectionDAG &DAG) const {
7766 EVT VT = Op.getValueType();
7767 assert(VT == MVT::v2i64 && "Only know how to lower V2I64 multiply");
7768 DebugLoc dl = Op.getDebugLoc();
7770 // ulong2 Ahi = __builtin_ia32_psrlqi128( a, 32);
7771 // ulong2 Bhi = __builtin_ia32_psrlqi128( b, 32);
7772 // ulong2 AloBlo = __builtin_ia32_pmuludq128( a, b );
7773 // ulong2 AloBhi = __builtin_ia32_pmuludq128( a, Bhi );
7774 // ulong2 AhiBlo = __builtin_ia32_pmuludq128( Ahi, b );
7776 // AloBhi = __builtin_ia32_psllqi128( AloBhi, 32 );
7777 // AhiBlo = __builtin_ia32_psllqi128( AhiBlo, 32 );
7778 // return AloBlo + AloBhi + AhiBlo;
7780 SDValue A = Op.getOperand(0);
7781 SDValue B = Op.getOperand(1);
7783 SDValue Ahi = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
7784 DAG.getConstant(Intrinsic::x86_sse2_psrli_q, MVT::i32),
7785 A, DAG.getConstant(32, MVT::i32));
7786 SDValue Bhi = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
7787 DAG.getConstant(Intrinsic::x86_sse2_psrli_q, MVT::i32),
7788 B, DAG.getConstant(32, MVT::i32));
7789 SDValue AloBlo = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
7790 DAG.getConstant(Intrinsic::x86_sse2_pmulu_dq, MVT::i32),
7792 SDValue AloBhi = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
7793 DAG.getConstant(Intrinsic::x86_sse2_pmulu_dq, MVT::i32),
7795 SDValue AhiBlo = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
7796 DAG.getConstant(Intrinsic::x86_sse2_pmulu_dq, MVT::i32),
7798 AloBhi = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
7799 DAG.getConstant(Intrinsic::x86_sse2_pslli_q, MVT::i32),
7800 AloBhi, DAG.getConstant(32, MVT::i32));
7801 AhiBlo = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
7802 DAG.getConstant(Intrinsic::x86_sse2_pslli_q, MVT::i32),
7803 AhiBlo, DAG.getConstant(32, MVT::i32));
7804 SDValue Res = DAG.getNode(ISD::ADD, dl, VT, AloBlo, AloBhi);
7805 Res = DAG.getNode(ISD::ADD, dl, VT, Res, AhiBlo);
7809 SDValue X86TargetLowering::LowerSHL(SDValue Op, SelectionDAG &DAG) const {
7810 EVT VT = Op.getValueType();
7811 DebugLoc dl = Op.getDebugLoc();
7812 SDValue R = Op.getOperand(0);
7814 LLVMContext *Context = DAG.getContext();
7816 assert(Subtarget->hasSSE41() && "Cannot lower SHL without SSE4.1 or later");
7818 if (VT == MVT::v4i32) {
7819 Op = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
7820 DAG.getConstant(Intrinsic::x86_sse2_pslli_d, MVT::i32),
7821 Op.getOperand(1), DAG.getConstant(23, MVT::i32));
7823 ConstantInt *CI = ConstantInt::get(*Context, APInt(32, 0x3f800000U));
7825 std::vector<Constant*> CV(4, CI);
7826 Constant *C = ConstantVector::get(CV);
7827 SDValue CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
7828 SDValue Addend = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
7829 PseudoSourceValue::getConstantPool(), 0,
7832 Op = DAG.getNode(ISD::ADD, dl, VT, Op, Addend);
7833 Op = DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v4f32, Op);
7834 Op = DAG.getNode(ISD::FP_TO_SINT, dl, VT, Op);
7835 return DAG.getNode(ISD::MUL, dl, VT, Op, R);
7837 if (VT == MVT::v16i8) {
7839 Op = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
7840 DAG.getConstant(Intrinsic::x86_sse2_pslli_w, MVT::i32),
7841 Op.getOperand(1), DAG.getConstant(5, MVT::i32));
7843 ConstantInt *CM1 = ConstantInt::get(*Context, APInt(8, 15));
7844 ConstantInt *CM2 = ConstantInt::get(*Context, APInt(8, 63));
7846 std::vector<Constant*> CVM1(16, CM1);
7847 std::vector<Constant*> CVM2(16, CM2);
7848 Constant *C = ConstantVector::get(CVM1);
7849 SDValue CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
7850 SDValue M = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
7851 PseudoSourceValue::getConstantPool(), 0,
7854 // r = pblendv(r, psllw(r & (char16)15, 4), a);
7855 M = DAG.getNode(ISD::AND, dl, VT, R, M);
7856 M = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
7857 DAG.getConstant(Intrinsic::x86_sse2_pslli_w, MVT::i32), M,
7858 DAG.getConstant(4, MVT::i32));
7859 R = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
7860 DAG.getConstant(Intrinsic::x86_sse41_pblendvb, MVT::i32),
7863 Op = DAG.getNode(ISD::ADD, dl, VT, Op, Op);
7865 C = ConstantVector::get(CVM2);
7866 CPIdx = DAG.getConstantPool(C, getPointerTy(), 16);
7867 M = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
7868 PseudoSourceValue::getConstantPool(), 0, false, false, 16);
7870 // r = pblendv(r, psllw(r & (char16)63, 2), a);
7871 M = DAG.getNode(ISD::AND, dl, VT, R, M);
7872 M = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
7873 DAG.getConstant(Intrinsic::x86_sse2_pslli_w, MVT::i32), M,
7874 DAG.getConstant(2, MVT::i32));
7875 R = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
7876 DAG.getConstant(Intrinsic::x86_sse41_pblendvb, MVT::i32),
7879 Op = DAG.getNode(ISD::ADD, dl, VT, Op, Op);
7881 // return pblendv(r, r+r, a);
7882 R = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
7883 DAG.getConstant(Intrinsic::x86_sse41_pblendvb, MVT::i32),
7884 R, DAG.getNode(ISD::ADD, dl, VT, R, R), Op);
7890 SDValue X86TargetLowering::LowerXALUO(SDValue Op, SelectionDAG &DAG) const {
7891 // Lower the "add/sub/mul with overflow" instruction into a regular ins plus
7892 // a "setcc" instruction that checks the overflow flag. The "brcond" lowering
7893 // looks for this combo and may remove the "setcc" instruction if the "setcc"
7894 // has only one use.
7895 SDNode *N = Op.getNode();
7896 SDValue LHS = N->getOperand(0);
7897 SDValue RHS = N->getOperand(1);
7898 unsigned BaseOp = 0;
7900 DebugLoc dl = Op.getDebugLoc();
7902 switch (Op.getOpcode()) {
7903 default: llvm_unreachable("Unknown ovf instruction!");
7905 // A subtract of one will be selected as a INC. Note that INC doesn't
7906 // set CF, so we can't do this for UADDO.
7907 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op))
7908 if (C->getAPIntValue() == 1) {
7909 BaseOp = X86ISD::INC;
7913 BaseOp = X86ISD::ADD;
7917 BaseOp = X86ISD::ADD;
7921 // A subtract of one will be selected as a DEC. Note that DEC doesn't
7922 // set CF, so we can't do this for USUBO.
7923 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op))
7924 if (C->getAPIntValue() == 1) {
7925 BaseOp = X86ISD::DEC;
7929 BaseOp = X86ISD::SUB;
7933 BaseOp = X86ISD::SUB;
7937 BaseOp = X86ISD::SMUL;
7941 BaseOp = X86ISD::UMUL;
7946 // Also sets EFLAGS.
7947 SDVTList VTs = DAG.getVTList(N->getValueType(0), MVT::i32);
7948 SDValue Sum = DAG.getNode(BaseOp, dl, VTs, LHS, RHS);
7951 DAG.getNode(X86ISD::SETCC, dl, N->getValueType(1),
7952 DAG.getConstant(Cond, MVT::i32), SDValue(Sum.getNode(), 1));
7954 DAG.ReplaceAllUsesOfValueWith(SDValue(N, 1), SetCC);
7958 SDValue X86TargetLowering::LowerMEMBARRIER(SDValue Op, SelectionDAG &DAG) const{
7959 DebugLoc dl = Op.getDebugLoc();
7961 if (!Subtarget->hasSSE2()) {
7962 SDValue Chain = Op.getOperand(0);
7963 SDValue Zero = DAG.getConstant(0,
7964 Subtarget->is64Bit() ? MVT::i64 : MVT::i32);
7966 DAG.getRegister(X86::ESP, MVT::i32), // Base
7967 DAG.getTargetConstant(1, MVT::i8), // Scale
7968 DAG.getRegister(0, MVT::i32), // Index
7969 DAG.getTargetConstant(0, MVT::i32), // Disp
7970 DAG.getRegister(0, MVT::i32), // Segment.
7975 DAG.getMachineNode(X86::OR32mrLocked, dl, MVT::Other, Ops,
7976 array_lengthof(Ops));
7977 return SDValue(Res, 0);
7980 unsigned isDev = cast<ConstantSDNode>(Op.getOperand(5))->getZExtValue();
7982 return DAG.getNode(X86ISD::MEMBARRIER, dl, MVT::Other, Op.getOperand(0));
7984 unsigned Op1 = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
7985 unsigned Op2 = cast<ConstantSDNode>(Op.getOperand(2))->getZExtValue();
7986 unsigned Op3 = cast<ConstantSDNode>(Op.getOperand(3))->getZExtValue();
7987 unsigned Op4 = cast<ConstantSDNode>(Op.getOperand(4))->getZExtValue();
7989 // def : Pat<(membarrier (i8 0), (i8 0), (i8 0), (i8 1), (i8 1)), (SFENCE)>;
7990 if (!Op1 && !Op2 && !Op3 && Op4)
7991 return DAG.getNode(X86ISD::SFENCE, dl, MVT::Other, Op.getOperand(0));
7993 // def : Pat<(membarrier (i8 1), (i8 0), (i8 0), (i8 0), (i8 1)), (LFENCE)>;
7994 if (Op1 && !Op2 && !Op3 && !Op4)
7995 return DAG.getNode(X86ISD::LFENCE, dl, MVT::Other, Op.getOperand(0));
7997 // def : Pat<(membarrier (i8 imm), (i8 imm), (i8 imm), (i8 imm), (i8 1)),
7999 return DAG.getNode(X86ISD::MFENCE, dl, MVT::Other, Op.getOperand(0));
8002 SDValue X86TargetLowering::LowerCMP_SWAP(SDValue Op, SelectionDAG &DAG) const {
8003 EVT T = Op.getValueType();
8004 DebugLoc dl = Op.getDebugLoc();
8007 switch(T.getSimpleVT().SimpleTy) {
8009 assert(false && "Invalid value type!");
8010 case MVT::i8: Reg = X86::AL; size = 1; break;
8011 case MVT::i16: Reg = X86::AX; size = 2; break;
8012 case MVT::i32: Reg = X86::EAX; size = 4; break;
8014 assert(Subtarget->is64Bit() && "Node not type legal!");
8015 Reg = X86::RAX; size = 8;
8018 SDValue cpIn = DAG.getCopyToReg(Op.getOperand(0), dl, Reg,
8019 Op.getOperand(2), SDValue());
8020 SDValue Ops[] = { cpIn.getValue(0),
8023 DAG.getTargetConstant(size, MVT::i8),
8025 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Flag);
8026 SDValue Result = DAG.getNode(X86ISD::LCMPXCHG_DAG, dl, Tys, Ops, 5);
8028 DAG.getCopyFromReg(Result.getValue(0), dl, Reg, T, Result.getValue(1));
8032 SDValue X86TargetLowering::LowerREADCYCLECOUNTER(SDValue Op,
8033 SelectionDAG &DAG) const {
8034 assert(Subtarget->is64Bit() && "Result not type legalized?");
8035 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Flag);
8036 SDValue TheChain = Op.getOperand(0);
8037 DebugLoc dl = Op.getDebugLoc();
8038 SDValue rd = DAG.getNode(X86ISD::RDTSC_DAG, dl, Tys, &TheChain, 1);
8039 SDValue rax = DAG.getCopyFromReg(rd, dl, X86::RAX, MVT::i64, rd.getValue(1));
8040 SDValue rdx = DAG.getCopyFromReg(rax.getValue(1), dl, X86::RDX, MVT::i64,
8042 SDValue Tmp = DAG.getNode(ISD::SHL, dl, MVT::i64, rdx,
8043 DAG.getConstant(32, MVT::i8));
8045 DAG.getNode(ISD::OR, dl, MVT::i64, rax, Tmp),
8048 return DAG.getMergeValues(Ops, 2, dl);
8051 SDValue X86TargetLowering::LowerBIT_CONVERT(SDValue Op,
8052 SelectionDAG &DAG) const {
8053 EVT SrcVT = Op.getOperand(0).getValueType();
8054 EVT DstVT = Op.getValueType();
8055 assert((Subtarget->is64Bit() && !Subtarget->hasSSE2() &&
8056 Subtarget->hasMMX() && !DisableMMX) &&
8057 "Unexpected custom BIT_CONVERT");
8058 assert((DstVT == MVT::i64 ||
8059 (DstVT.isVector() && DstVT.getSizeInBits()==64)) &&
8060 "Unexpected custom BIT_CONVERT");
8061 // i64 <=> MMX conversions are Legal.
8062 if (SrcVT==MVT::i64 && DstVT.isVector())
8064 if (DstVT==MVT::i64 && SrcVT.isVector())
8066 // MMX <=> MMX conversions are Legal.
8067 if (SrcVT.isVector() && DstVT.isVector())
8069 // All other conversions need to be expanded.
8072 SDValue X86TargetLowering::LowerLOAD_SUB(SDValue Op, SelectionDAG &DAG) const {
8073 SDNode *Node = Op.getNode();
8074 DebugLoc dl = Node->getDebugLoc();
8075 EVT T = Node->getValueType(0);
8076 SDValue negOp = DAG.getNode(ISD::SUB, dl, T,
8077 DAG.getConstant(0, T), Node->getOperand(2));
8078 return DAG.getAtomic(ISD::ATOMIC_LOAD_ADD, dl,
8079 cast<AtomicSDNode>(Node)->getMemoryVT(),
8080 Node->getOperand(0),
8081 Node->getOperand(1), negOp,
8082 cast<AtomicSDNode>(Node)->getSrcValue(),
8083 cast<AtomicSDNode>(Node)->getAlignment());
8086 /// LowerOperation - Provide custom lowering hooks for some operations.
8088 SDValue X86TargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const {
8089 switch (Op.getOpcode()) {
8090 default: llvm_unreachable("Should not custom lower this!");
8091 case ISD::MEMBARRIER: return LowerMEMBARRIER(Op,DAG);
8092 case ISD::ATOMIC_CMP_SWAP: return LowerCMP_SWAP(Op,DAG);
8093 case ISD::ATOMIC_LOAD_SUB: return LowerLOAD_SUB(Op,DAG);
8094 case ISD::BUILD_VECTOR: return LowerBUILD_VECTOR(Op, DAG);
8095 case ISD::CONCAT_VECTORS: return LowerCONCAT_VECTORS(Op, DAG);
8096 case ISD::VECTOR_SHUFFLE: return LowerVECTOR_SHUFFLE(Op, DAG);
8097 case ISD::EXTRACT_VECTOR_ELT: return LowerEXTRACT_VECTOR_ELT(Op, DAG);
8098 case ISD::INSERT_VECTOR_ELT: return LowerINSERT_VECTOR_ELT(Op, DAG);
8099 case ISD::SCALAR_TO_VECTOR: return LowerSCALAR_TO_VECTOR(Op, DAG);
8100 case ISD::ConstantPool: return LowerConstantPool(Op, DAG);
8101 case ISD::GlobalAddress: return LowerGlobalAddress(Op, DAG);
8102 case ISD::GlobalTLSAddress: return LowerGlobalTLSAddress(Op, DAG);
8103 case ISD::ExternalSymbol: return LowerExternalSymbol(Op, DAG);
8104 case ISD::BlockAddress: return LowerBlockAddress(Op, DAG);
8105 case ISD::SHL_PARTS:
8106 case ISD::SRA_PARTS:
8107 case ISD::SRL_PARTS: return LowerShift(Op, DAG);
8108 case ISD::SINT_TO_FP: return LowerSINT_TO_FP(Op, DAG);
8109 case ISD::UINT_TO_FP: return LowerUINT_TO_FP(Op, DAG);
8110 case ISD::FP_TO_SINT: return LowerFP_TO_SINT(Op, DAG);
8111 case ISD::FP_TO_UINT: return LowerFP_TO_UINT(Op, DAG);
8112 case ISD::FABS: return LowerFABS(Op, DAG);
8113 case ISD::FNEG: return LowerFNEG(Op, DAG);
8114 case ISD::FCOPYSIGN: return LowerFCOPYSIGN(Op, DAG);
8115 case ISD::SETCC: return LowerSETCC(Op, DAG);
8116 case ISD::VSETCC: return LowerVSETCC(Op, DAG);
8117 case ISD::SELECT: return LowerSELECT(Op, DAG);
8118 case ISD::BRCOND: return LowerBRCOND(Op, DAG);
8119 case ISD::JumpTable: return LowerJumpTable(Op, DAG);
8120 case ISD::VASTART: return LowerVASTART(Op, DAG);
8121 case ISD::VAARG: return LowerVAARG(Op, DAG);
8122 case ISD::VACOPY: return LowerVACOPY(Op, DAG);
8123 case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG);
8124 case ISD::RETURNADDR: return LowerRETURNADDR(Op, DAG);
8125 case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
8126 case ISD::FRAME_TO_ARGS_OFFSET:
8127 return LowerFRAME_TO_ARGS_OFFSET(Op, DAG);
8128 case ISD::DYNAMIC_STACKALLOC: return LowerDYNAMIC_STACKALLOC(Op, DAG);
8129 case ISD::EH_RETURN: return LowerEH_RETURN(Op, DAG);
8130 case ISD::TRAMPOLINE: return LowerTRAMPOLINE(Op, DAG);
8131 case ISD::FLT_ROUNDS_: return LowerFLT_ROUNDS_(Op, DAG);
8132 case ISD::CTLZ: return LowerCTLZ(Op, DAG);
8133 case ISD::CTTZ: return LowerCTTZ(Op, DAG);
8134 case ISD::MUL: return LowerMUL_V2I64(Op, DAG);
8135 case ISD::SHL: return LowerSHL(Op, DAG);
8141 case ISD::UMULO: return LowerXALUO(Op, DAG);
8142 case ISD::READCYCLECOUNTER: return LowerREADCYCLECOUNTER(Op, DAG);
8143 case ISD::BIT_CONVERT: return LowerBIT_CONVERT(Op, DAG);
8147 void X86TargetLowering::
8148 ReplaceATOMIC_BINARY_64(SDNode *Node, SmallVectorImpl<SDValue>&Results,
8149 SelectionDAG &DAG, unsigned NewOp) const {
8150 EVT T = Node->getValueType(0);
8151 DebugLoc dl = Node->getDebugLoc();
8152 assert (T == MVT::i64 && "Only know how to expand i64 atomics");
8154 SDValue Chain = Node->getOperand(0);
8155 SDValue In1 = Node->getOperand(1);
8156 SDValue In2L = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
8157 Node->getOperand(2), DAG.getIntPtrConstant(0));
8158 SDValue In2H = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
8159 Node->getOperand(2), DAG.getIntPtrConstant(1));
8160 SDValue Ops[] = { Chain, In1, In2L, In2H };
8161 SDVTList Tys = DAG.getVTList(MVT::i32, MVT::i32, MVT::Other);
8163 DAG.getMemIntrinsicNode(NewOp, dl, Tys, Ops, 4, MVT::i64,
8164 cast<MemSDNode>(Node)->getMemOperand());
8165 SDValue OpsF[] = { Result.getValue(0), Result.getValue(1)};
8166 Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, OpsF, 2));
8167 Results.push_back(Result.getValue(2));
8170 /// ReplaceNodeResults - Replace a node with an illegal result type
8171 /// with a new node built out of custom code.
8172 void X86TargetLowering::ReplaceNodeResults(SDNode *N,
8173 SmallVectorImpl<SDValue>&Results,
8174 SelectionDAG &DAG) const {
8175 DebugLoc dl = N->getDebugLoc();
8176 switch (N->getOpcode()) {
8178 assert(false && "Do not know how to custom type legalize this operation!");
8180 case ISD::FP_TO_SINT: {
8181 std::pair<SDValue,SDValue> Vals =
8182 FP_TO_INTHelper(SDValue(N, 0), DAG, true);
8183 SDValue FIST = Vals.first, StackSlot = Vals.second;
8184 if (FIST.getNode() != 0) {
8185 EVT VT = N->getValueType(0);
8186 // Return a load from the stack slot.
8187 Results.push_back(DAG.getLoad(VT, dl, FIST, StackSlot, NULL, 0,
8192 case ISD::READCYCLECOUNTER: {
8193 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Flag);
8194 SDValue TheChain = N->getOperand(0);
8195 SDValue rd = DAG.getNode(X86ISD::RDTSC_DAG, dl, Tys, &TheChain, 1);
8196 SDValue eax = DAG.getCopyFromReg(rd, dl, X86::EAX, MVT::i32,
8198 SDValue edx = DAG.getCopyFromReg(eax.getValue(1), dl, X86::EDX, MVT::i32,
8200 // Use a buildpair to merge the two 32-bit values into a 64-bit one.
8201 SDValue Ops[] = { eax, edx };
8202 Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Ops, 2));
8203 Results.push_back(edx.getValue(1));
8206 case ISD::ATOMIC_CMP_SWAP: {
8207 EVT T = N->getValueType(0);
8208 assert (T == MVT::i64 && "Only know how to expand i64 Cmp and Swap");
8209 SDValue cpInL, cpInH;
8210 cpInL = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(2),
8211 DAG.getConstant(0, MVT::i32));
8212 cpInH = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(2),
8213 DAG.getConstant(1, MVT::i32));
8214 cpInL = DAG.getCopyToReg(N->getOperand(0), dl, X86::EAX, cpInL, SDValue());
8215 cpInH = DAG.getCopyToReg(cpInL.getValue(0), dl, X86::EDX, cpInH,
8217 SDValue swapInL, swapInH;
8218 swapInL = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(3),
8219 DAG.getConstant(0, MVT::i32));
8220 swapInH = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(3),
8221 DAG.getConstant(1, MVT::i32));
8222 swapInL = DAG.getCopyToReg(cpInH.getValue(0), dl, X86::EBX, swapInL,
8224 swapInH = DAG.getCopyToReg(swapInL.getValue(0), dl, X86::ECX, swapInH,
8225 swapInL.getValue(1));
8226 SDValue Ops[] = { swapInH.getValue(0),
8228 swapInH.getValue(1) };
8229 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Flag);
8230 SDValue Result = DAG.getNode(X86ISD::LCMPXCHG8_DAG, dl, Tys, Ops, 3);
8231 SDValue cpOutL = DAG.getCopyFromReg(Result.getValue(0), dl, X86::EAX,
8232 MVT::i32, Result.getValue(1));
8233 SDValue cpOutH = DAG.getCopyFromReg(cpOutL.getValue(1), dl, X86::EDX,
8234 MVT::i32, cpOutL.getValue(2));
8235 SDValue OpsF[] = { cpOutL.getValue(0), cpOutH.getValue(0)};
8236 Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, OpsF, 2));
8237 Results.push_back(cpOutH.getValue(1));
8240 case ISD::ATOMIC_LOAD_ADD:
8241 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMADD64_DAG);
8243 case ISD::ATOMIC_LOAD_AND:
8244 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMAND64_DAG);
8246 case ISD::ATOMIC_LOAD_NAND:
8247 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMNAND64_DAG);
8249 case ISD::ATOMIC_LOAD_OR:
8250 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMOR64_DAG);
8252 case ISD::ATOMIC_LOAD_SUB:
8253 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMSUB64_DAG);
8255 case ISD::ATOMIC_LOAD_XOR:
8256 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMXOR64_DAG);
8258 case ISD::ATOMIC_SWAP:
8259 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMSWAP64_DAG);
8264 const char *X86TargetLowering::getTargetNodeName(unsigned Opcode) const {
8266 default: return NULL;
8267 case X86ISD::BSF: return "X86ISD::BSF";
8268 case X86ISD::BSR: return "X86ISD::BSR";
8269 case X86ISD::SHLD: return "X86ISD::SHLD";
8270 case X86ISD::SHRD: return "X86ISD::SHRD";
8271 case X86ISD::FAND: return "X86ISD::FAND";
8272 case X86ISD::FOR: return "X86ISD::FOR";
8273 case X86ISD::FXOR: return "X86ISD::FXOR";
8274 case X86ISD::FSRL: return "X86ISD::FSRL";
8275 case X86ISD::FILD: return "X86ISD::FILD";
8276 case X86ISD::FILD_FLAG: return "X86ISD::FILD_FLAG";
8277 case X86ISD::FP_TO_INT16_IN_MEM: return "X86ISD::FP_TO_INT16_IN_MEM";
8278 case X86ISD::FP_TO_INT32_IN_MEM: return "X86ISD::FP_TO_INT32_IN_MEM";
8279 case X86ISD::FP_TO_INT64_IN_MEM: return "X86ISD::FP_TO_INT64_IN_MEM";
8280 case X86ISD::FLD: return "X86ISD::FLD";
8281 case X86ISD::FST: return "X86ISD::FST";
8282 case X86ISD::CALL: return "X86ISD::CALL";
8283 case X86ISD::RDTSC_DAG: return "X86ISD::RDTSC_DAG";
8284 case X86ISD::BT: return "X86ISD::BT";
8285 case X86ISD::CMP: return "X86ISD::CMP";
8286 case X86ISD::COMI: return "X86ISD::COMI";
8287 case X86ISD::UCOMI: return "X86ISD::UCOMI";
8288 case X86ISD::SETCC: return "X86ISD::SETCC";
8289 case X86ISD::SETCC_CARRY: return "X86ISD::SETCC_CARRY";
8290 case X86ISD::CMOV: return "X86ISD::CMOV";
8291 case X86ISD::BRCOND: return "X86ISD::BRCOND";
8292 case X86ISD::RET_FLAG: return "X86ISD::RET_FLAG";
8293 case X86ISD::REP_STOS: return "X86ISD::REP_STOS";
8294 case X86ISD::REP_MOVS: return "X86ISD::REP_MOVS";
8295 case X86ISD::GlobalBaseReg: return "X86ISD::GlobalBaseReg";
8296 case X86ISD::Wrapper: return "X86ISD::Wrapper";
8297 case X86ISD::WrapperRIP: return "X86ISD::WrapperRIP";
8298 case X86ISD::PEXTRB: return "X86ISD::PEXTRB";
8299 case X86ISD::PEXTRW: return "X86ISD::PEXTRW";
8300 case X86ISD::INSERTPS: return "X86ISD::INSERTPS";
8301 case X86ISD::PINSRB: return "X86ISD::PINSRB";
8302 case X86ISD::PINSRW: return "X86ISD::PINSRW";
8303 case X86ISD::MMX_PINSRW: return "X86ISD::MMX_PINSRW";
8304 case X86ISD::PSHUFB: return "X86ISD::PSHUFB";
8305 case X86ISD::FMAX: return "X86ISD::FMAX";
8306 case X86ISD::FMIN: return "X86ISD::FMIN";
8307 case X86ISD::FRSQRT: return "X86ISD::FRSQRT";
8308 case X86ISD::FRCP: return "X86ISD::FRCP";
8309 case X86ISD::TLSADDR: return "X86ISD::TLSADDR";
8310 case X86ISD::TLSCALL: return "X86ISD::TLSCALL";
8311 case X86ISD::SegmentBaseAddress: return "X86ISD::SegmentBaseAddress";
8312 case X86ISD::EH_RETURN: return "X86ISD::EH_RETURN";
8313 case X86ISD::TC_RETURN: return "X86ISD::TC_RETURN";
8314 case X86ISD::FNSTCW16m: return "X86ISD::FNSTCW16m";
8315 case X86ISD::LCMPXCHG_DAG: return "X86ISD::LCMPXCHG_DAG";
8316 case X86ISD::LCMPXCHG8_DAG: return "X86ISD::LCMPXCHG8_DAG";
8317 case X86ISD::ATOMADD64_DAG: return "X86ISD::ATOMADD64_DAG";
8318 case X86ISD::ATOMSUB64_DAG: return "X86ISD::ATOMSUB64_DAG";
8319 case X86ISD::ATOMOR64_DAG: return "X86ISD::ATOMOR64_DAG";
8320 case X86ISD::ATOMXOR64_DAG: return "X86ISD::ATOMXOR64_DAG";
8321 case X86ISD::ATOMAND64_DAG: return "X86ISD::ATOMAND64_DAG";
8322 case X86ISD::ATOMNAND64_DAG: return "X86ISD::ATOMNAND64_DAG";
8323 case X86ISD::VZEXT_MOVL: return "X86ISD::VZEXT_MOVL";
8324 case X86ISD::VZEXT_LOAD: return "X86ISD::VZEXT_LOAD";
8325 case X86ISD::VSHL: return "X86ISD::VSHL";
8326 case X86ISD::VSRL: return "X86ISD::VSRL";
8327 case X86ISD::CMPPD: return "X86ISD::CMPPD";
8328 case X86ISD::CMPPS: return "X86ISD::CMPPS";
8329 case X86ISD::PCMPEQB: return "X86ISD::PCMPEQB";
8330 case X86ISD::PCMPEQW: return "X86ISD::PCMPEQW";
8331 case X86ISD::PCMPEQD: return "X86ISD::PCMPEQD";
8332 case X86ISD::PCMPEQQ: return "X86ISD::PCMPEQQ";
8333 case X86ISD::PCMPGTB: return "X86ISD::PCMPGTB";
8334 case X86ISD::PCMPGTW: return "X86ISD::PCMPGTW";
8335 case X86ISD::PCMPGTD: return "X86ISD::PCMPGTD";
8336 case X86ISD::PCMPGTQ: return "X86ISD::PCMPGTQ";
8337 case X86ISD::ADD: return "X86ISD::ADD";
8338 case X86ISD::SUB: return "X86ISD::SUB";
8339 case X86ISD::SMUL: return "X86ISD::SMUL";
8340 case X86ISD::UMUL: return "X86ISD::UMUL";
8341 case X86ISD::INC: return "X86ISD::INC";
8342 case X86ISD::DEC: return "X86ISD::DEC";
8343 case X86ISD::OR: return "X86ISD::OR";
8344 case X86ISD::XOR: return "X86ISD::XOR";
8345 case X86ISD::AND: return "X86ISD::AND";
8346 case X86ISD::MUL_IMM: return "X86ISD::MUL_IMM";
8347 case X86ISD::PTEST: return "X86ISD::PTEST";
8348 case X86ISD::TESTP: return "X86ISD::TESTP";
8349 case X86ISD::PALIGN: return "X86ISD::PALIGN";
8350 case X86ISD::PSHUFD: return "X86ISD::PSHUFD";
8351 case X86ISD::PSHUFHW: return "X86ISD::PSHUFHW";
8352 case X86ISD::PSHUFHW_LD: return "X86ISD::PSHUFHW_LD";
8353 case X86ISD::PSHUFLW: return "X86ISD::PSHUFLW";
8354 case X86ISD::PSHUFLW_LD: return "X86ISD::PSHUFLW_LD";
8355 case X86ISD::SHUFPS: return "X86ISD::SHUFPS";
8356 case X86ISD::SHUFPD: return "X86ISD::SHUFPD";
8357 case X86ISD::MOVLHPS: return "X86ISD::MOVLHPS";
8358 case X86ISD::MOVHLPS: return "X86ISD::MOVHLPS";
8359 case X86ISD::MOVLHPD: return "X86ISD::MOVLHPD";
8360 case X86ISD::MOVHLPD: return "X86ISD::MOVHLPD";
8361 case X86ISD::MOVHPS: return "X86ISD::MOVHPS";
8362 case X86ISD::MOVLPS: return "X86ISD::MOVLPS";
8363 case X86ISD::MOVHPD: return "X86ISD::MOVHPD";
8364 case X86ISD::MOVLPD: return "X86ISD::MOVLPD";
8365 case X86ISD::MOVDDUP: return "X86ISD::MOVDDUP";
8366 case X86ISD::MOVSHDUP: return "X86ISD::MOVSHDUP";
8367 case X86ISD::MOVSLDUP: return "X86ISD::MOVSLDUP";
8368 case X86ISD::MOVSHDUP_LD: return "X86ISD::MOVSHDUP_LD";
8369 case X86ISD::MOVSLDUP_LD: return "X86ISD::MOVSLDUP_LD";
8370 case X86ISD::MOVSD: return "X86ISD::MOVSD";
8371 case X86ISD::MOVSS: return "X86ISD::MOVSS";
8372 case X86ISD::UNPCKLPS: return "X86ISD::UNPCKLPS";
8373 case X86ISD::UNPCKLPD: return "X86ISD::UNPCKLPD";
8374 case X86ISD::UNPCKHPS: return "X86ISD::UNPCKHPS";
8375 case X86ISD::UNPCKHPD: return "X86ISD::UNPCKHPD";
8376 case X86ISD::PUNPCKLBW: return "X86ISD::PUNPCKLBW";
8377 case X86ISD::PUNPCKLWD: return "X86ISD::PUNPCKLWD";
8378 case X86ISD::PUNPCKLDQ: return "X86ISD::PUNPCKLDQ";
8379 case X86ISD::PUNPCKLQDQ: return "X86ISD::PUNPCKLQDQ";
8380 case X86ISD::PUNPCKHBW: return "X86ISD::PUNPCKHBW";
8381 case X86ISD::PUNPCKHWD: return "X86ISD::PUNPCKHWD";
8382 case X86ISD::PUNPCKHDQ: return "X86ISD::PUNPCKHDQ";
8383 case X86ISD::PUNPCKHQDQ: return "X86ISD::PUNPCKHQDQ";
8384 case X86ISD::VASTART_SAVE_XMM_REGS: return "X86ISD::VASTART_SAVE_XMM_REGS";
8385 case X86ISD::MINGW_ALLOCA: return "X86ISD::MINGW_ALLOCA";
8389 // isLegalAddressingMode - Return true if the addressing mode represented
8390 // by AM is legal for this target, for a load/store of the specified type.
8391 bool X86TargetLowering::isLegalAddressingMode(const AddrMode &AM,
8392 const Type *Ty) const {
8393 // X86 supports extremely general addressing modes.
8394 CodeModel::Model M = getTargetMachine().getCodeModel();
8395 Reloc::Model R = getTargetMachine().getRelocationModel();
8397 // X86 allows a sign-extended 32-bit immediate field as a displacement.
8398 if (!X86::isOffsetSuitableForCodeModel(AM.BaseOffs, M, AM.BaseGV != NULL))
8403 Subtarget->ClassifyGlobalReference(AM.BaseGV, getTargetMachine());
8405 // If a reference to this global requires an extra load, we can't fold it.
8406 if (isGlobalStubReference(GVFlags))
8409 // If BaseGV requires a register for the PIC base, we cannot also have a
8410 // BaseReg specified.
8411 if (AM.HasBaseReg && isGlobalRelativeToPICBase(GVFlags))
8414 // If lower 4G is not available, then we must use rip-relative addressing.
8415 if ((M != CodeModel::Small || R != Reloc::Static) &&
8416 Subtarget->is64Bit() && (AM.BaseOffs || AM.Scale > 1))
8426 // These scales always work.
8431 // These scales are formed with basereg+scalereg. Only accept if there is
8436 default: // Other stuff never works.
8444 bool X86TargetLowering::isTruncateFree(const Type *Ty1, const Type *Ty2) const {
8445 if (!Ty1->isIntegerTy() || !Ty2->isIntegerTy())
8447 unsigned NumBits1 = Ty1->getPrimitiveSizeInBits();
8448 unsigned NumBits2 = Ty2->getPrimitiveSizeInBits();
8449 if (NumBits1 <= NumBits2)
8454 bool X86TargetLowering::isTruncateFree(EVT VT1, EVT VT2) const {
8455 if (!VT1.isInteger() || !VT2.isInteger())
8457 unsigned NumBits1 = VT1.getSizeInBits();
8458 unsigned NumBits2 = VT2.getSizeInBits();
8459 if (NumBits1 <= NumBits2)
8464 bool X86TargetLowering::isZExtFree(const Type *Ty1, const Type *Ty2) const {
8465 // x86-64 implicitly zero-extends 32-bit results in 64-bit registers.
8466 return Ty1->isIntegerTy(32) && Ty2->isIntegerTy(64) && Subtarget->is64Bit();
8469 bool X86TargetLowering::isZExtFree(EVT VT1, EVT VT2) const {
8470 // x86-64 implicitly zero-extends 32-bit results in 64-bit registers.
8471 return VT1 == MVT::i32 && VT2 == MVT::i64 && Subtarget->is64Bit();
8474 bool X86TargetLowering::isNarrowingProfitable(EVT VT1, EVT VT2) const {
8475 // i16 instructions are longer (0x66 prefix) and potentially slower.
8476 return !(VT1 == MVT::i32 && VT2 == MVT::i16);
8479 /// isShuffleMaskLegal - Targets can use this to indicate that they only
8480 /// support *some* VECTOR_SHUFFLE operations, those with specific masks.
8481 /// By default, if a target supports the VECTOR_SHUFFLE node, all mask values
8482 /// are assumed to be legal.
8484 X86TargetLowering::isShuffleMaskLegal(const SmallVectorImpl<int> &M,
8486 // Very little shuffling can be done for 64-bit vectors right now.
8487 if (VT.getSizeInBits() == 64)
8488 return isPALIGNRMask(M, VT, Subtarget->hasSSSE3());
8490 // FIXME: pshufb, blends, shifts.
8491 return (VT.getVectorNumElements() == 2 ||
8492 ShuffleVectorSDNode::isSplatMask(&M[0], VT) ||
8493 isMOVLMask(M, VT) ||
8494 isSHUFPMask(M, VT) ||
8495 isPSHUFDMask(M, VT) ||
8496 isPSHUFHWMask(M, VT) ||
8497 isPSHUFLWMask(M, VT) ||
8498 isPALIGNRMask(M, VT, Subtarget->hasSSSE3()) ||
8499 isUNPCKLMask(M, VT) ||
8500 isUNPCKHMask(M, VT) ||
8501 isUNPCKL_v_undef_Mask(M, VT) ||
8502 isUNPCKH_v_undef_Mask(M, VT));
8506 X86TargetLowering::isVectorClearMaskLegal(const SmallVectorImpl<int> &Mask,
8508 unsigned NumElts = VT.getVectorNumElements();
8509 // FIXME: This collection of masks seems suspect.
8512 if (NumElts == 4 && VT.getSizeInBits() == 128) {
8513 return (isMOVLMask(Mask, VT) ||
8514 isCommutedMOVLMask(Mask, VT, true) ||
8515 isSHUFPMask(Mask, VT) ||
8516 isCommutedSHUFPMask(Mask, VT));
8521 //===----------------------------------------------------------------------===//
8522 // X86 Scheduler Hooks
8523 //===----------------------------------------------------------------------===//
8525 // private utility function
8527 X86TargetLowering::EmitAtomicBitwiseWithCustomInserter(MachineInstr *bInstr,
8528 MachineBasicBlock *MBB,
8535 TargetRegisterClass *RC,
8536 bool invSrc) const {
8537 // For the atomic bitwise operator, we generate
8540 // ld t1 = [bitinstr.addr]
8541 // op t2 = t1, [bitinstr.val]
8543 // lcs dest = [bitinstr.addr], t2 [EAX is implicit]
8545 // fallthrough -->nextMBB
8546 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
8547 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
8548 MachineFunction::iterator MBBIter = MBB;
8551 /// First build the CFG
8552 MachineFunction *F = MBB->getParent();
8553 MachineBasicBlock *thisMBB = MBB;
8554 MachineBasicBlock *newMBB = F->CreateMachineBasicBlock(LLVM_BB);
8555 MachineBasicBlock *nextMBB = F->CreateMachineBasicBlock(LLVM_BB);
8556 F->insert(MBBIter, newMBB);
8557 F->insert(MBBIter, nextMBB);
8559 // Transfer the remainder of thisMBB and its successor edges to nextMBB.
8560 nextMBB->splice(nextMBB->begin(), thisMBB,
8561 llvm::next(MachineBasicBlock::iterator(bInstr)),
8563 nextMBB->transferSuccessorsAndUpdatePHIs(thisMBB);
8565 // Update thisMBB to fall through to newMBB
8566 thisMBB->addSuccessor(newMBB);
8568 // newMBB jumps to itself and fall through to nextMBB
8569 newMBB->addSuccessor(nextMBB);
8570 newMBB->addSuccessor(newMBB);
8572 // Insert instructions into newMBB based on incoming instruction
8573 assert(bInstr->getNumOperands() < X86::AddrNumOperands + 4 &&
8574 "unexpected number of operands");
8575 DebugLoc dl = bInstr->getDebugLoc();
8576 MachineOperand& destOper = bInstr->getOperand(0);
8577 MachineOperand* argOpers[2 + X86::AddrNumOperands];
8578 int numArgs = bInstr->getNumOperands() - 1;
8579 for (int i=0; i < numArgs; ++i)
8580 argOpers[i] = &bInstr->getOperand(i+1);
8582 // x86 address has 4 operands: base, index, scale, and displacement
8583 int lastAddrIndx = X86::AddrNumOperands - 1; // [0,3]
8584 int valArgIndx = lastAddrIndx + 1;
8586 unsigned t1 = F->getRegInfo().createVirtualRegister(RC);
8587 MachineInstrBuilder MIB = BuildMI(newMBB, dl, TII->get(LoadOpc), t1);
8588 for (int i=0; i <= lastAddrIndx; ++i)
8589 (*MIB).addOperand(*argOpers[i]);
8591 unsigned tt = F->getRegInfo().createVirtualRegister(RC);
8593 MIB = BuildMI(newMBB, dl, TII->get(notOpc), tt).addReg(t1);
8598 unsigned t2 = F->getRegInfo().createVirtualRegister(RC);
8599 assert((argOpers[valArgIndx]->isReg() ||
8600 argOpers[valArgIndx]->isImm()) &&
8602 if (argOpers[valArgIndx]->isReg())
8603 MIB = BuildMI(newMBB, dl, TII->get(regOpc), t2);
8605 MIB = BuildMI(newMBB, dl, TII->get(immOpc), t2);
8607 (*MIB).addOperand(*argOpers[valArgIndx]);
8609 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), EAXreg);
8612 MIB = BuildMI(newMBB, dl, TII->get(CXchgOpc));
8613 for (int i=0; i <= lastAddrIndx; ++i)
8614 (*MIB).addOperand(*argOpers[i]);
8616 assert(bInstr->hasOneMemOperand() && "Unexpected number of memoperand");
8617 (*MIB).setMemRefs(bInstr->memoperands_begin(),
8618 bInstr->memoperands_end());
8620 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), destOper.getReg());
8624 BuildMI(newMBB, dl, TII->get(X86::JNE_4)).addMBB(newMBB);
8626 bInstr->eraseFromParent(); // The pseudo instruction is gone now.
8630 // private utility function: 64 bit atomics on 32 bit host.
8632 X86TargetLowering::EmitAtomicBit6432WithCustomInserter(MachineInstr *bInstr,
8633 MachineBasicBlock *MBB,
8638 bool invSrc) const {
8639 // For the atomic bitwise operator, we generate
8640 // thisMBB (instructions are in pairs, except cmpxchg8b)
8641 // ld t1,t2 = [bitinstr.addr]
8643 // out1, out2 = phi (thisMBB, t1/t2) (newMBB, t3/t4)
8644 // op t5, t6 <- out1, out2, [bitinstr.val]
8645 // (for SWAP, substitute: mov t5, t6 <- [bitinstr.val])
8646 // mov ECX, EBX <- t5, t6
8647 // mov EAX, EDX <- t1, t2
8648 // cmpxchg8b [bitinstr.addr] [EAX, EDX, EBX, ECX implicit]
8649 // mov t3, t4 <- EAX, EDX
8651 // result in out1, out2
8652 // fallthrough -->nextMBB
8654 const TargetRegisterClass *RC = X86::GR32RegisterClass;
8655 const unsigned LoadOpc = X86::MOV32rm;
8656 const unsigned NotOpc = X86::NOT32r;
8657 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
8658 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
8659 MachineFunction::iterator MBBIter = MBB;
8662 /// First build the CFG
8663 MachineFunction *F = MBB->getParent();
8664 MachineBasicBlock *thisMBB = MBB;
8665 MachineBasicBlock *newMBB = F->CreateMachineBasicBlock(LLVM_BB);
8666 MachineBasicBlock *nextMBB = F->CreateMachineBasicBlock(LLVM_BB);
8667 F->insert(MBBIter, newMBB);
8668 F->insert(MBBIter, nextMBB);
8670 // Transfer the remainder of thisMBB and its successor edges to nextMBB.
8671 nextMBB->splice(nextMBB->begin(), thisMBB,
8672 llvm::next(MachineBasicBlock::iterator(bInstr)),
8674 nextMBB->transferSuccessorsAndUpdatePHIs(thisMBB);
8676 // Update thisMBB to fall through to newMBB
8677 thisMBB->addSuccessor(newMBB);
8679 // newMBB jumps to itself and fall through to nextMBB
8680 newMBB->addSuccessor(nextMBB);
8681 newMBB->addSuccessor(newMBB);
8683 DebugLoc dl = bInstr->getDebugLoc();
8684 // Insert instructions into newMBB based on incoming instruction
8685 // There are 8 "real" operands plus 9 implicit def/uses, ignored here.
8686 assert(bInstr->getNumOperands() < X86::AddrNumOperands + 14 &&
8687 "unexpected number of operands");
8688 MachineOperand& dest1Oper = bInstr->getOperand(0);
8689 MachineOperand& dest2Oper = bInstr->getOperand(1);
8690 MachineOperand* argOpers[2 + X86::AddrNumOperands];
8691 for (int i=0; i < 2 + X86::AddrNumOperands; ++i) {
8692 argOpers[i] = &bInstr->getOperand(i+2);
8694 // We use some of the operands multiple times, so conservatively just
8695 // clear any kill flags that might be present.
8696 if (argOpers[i]->isReg() && argOpers[i]->isUse())
8697 argOpers[i]->setIsKill(false);
8700 // x86 address has 5 operands: base, index, scale, displacement, and segment.
8701 int lastAddrIndx = X86::AddrNumOperands - 1; // [0,3]
8703 unsigned t1 = F->getRegInfo().createVirtualRegister(RC);
8704 MachineInstrBuilder MIB = BuildMI(thisMBB, dl, TII->get(LoadOpc), t1);
8705 for (int i=0; i <= lastAddrIndx; ++i)
8706 (*MIB).addOperand(*argOpers[i]);
8707 unsigned t2 = F->getRegInfo().createVirtualRegister(RC);
8708 MIB = BuildMI(thisMBB, dl, TII->get(LoadOpc), t2);
8709 // add 4 to displacement.
8710 for (int i=0; i <= lastAddrIndx-2; ++i)
8711 (*MIB).addOperand(*argOpers[i]);
8712 MachineOperand newOp3 = *(argOpers[3]);
8714 newOp3.setImm(newOp3.getImm()+4);
8716 newOp3.setOffset(newOp3.getOffset()+4);
8717 (*MIB).addOperand(newOp3);
8718 (*MIB).addOperand(*argOpers[lastAddrIndx]);
8720 // t3/4 are defined later, at the bottom of the loop
8721 unsigned t3 = F->getRegInfo().createVirtualRegister(RC);
8722 unsigned t4 = F->getRegInfo().createVirtualRegister(RC);
8723 BuildMI(newMBB, dl, TII->get(X86::PHI), dest1Oper.getReg())
8724 .addReg(t1).addMBB(thisMBB).addReg(t3).addMBB(newMBB);
8725 BuildMI(newMBB, dl, TII->get(X86::PHI), dest2Oper.getReg())
8726 .addReg(t2).addMBB(thisMBB).addReg(t4).addMBB(newMBB);
8728 // The subsequent operations should be using the destination registers of
8729 //the PHI instructions.
8731 t1 = F->getRegInfo().createVirtualRegister(RC);
8732 t2 = F->getRegInfo().createVirtualRegister(RC);
8733 MIB = BuildMI(newMBB, dl, TII->get(NotOpc), t1).addReg(dest1Oper.getReg());
8734 MIB = BuildMI(newMBB, dl, TII->get(NotOpc), t2).addReg(dest2Oper.getReg());
8736 t1 = dest1Oper.getReg();
8737 t2 = dest2Oper.getReg();
8740 int valArgIndx = lastAddrIndx + 1;
8741 assert((argOpers[valArgIndx]->isReg() ||
8742 argOpers[valArgIndx]->isImm()) &&
8744 unsigned t5 = F->getRegInfo().createVirtualRegister(RC);
8745 unsigned t6 = F->getRegInfo().createVirtualRegister(RC);
8746 if (argOpers[valArgIndx]->isReg())
8747 MIB = BuildMI(newMBB, dl, TII->get(regOpcL), t5);
8749 MIB = BuildMI(newMBB, dl, TII->get(immOpcL), t5);
8750 if (regOpcL != X86::MOV32rr)
8752 (*MIB).addOperand(*argOpers[valArgIndx]);
8753 assert(argOpers[valArgIndx + 1]->isReg() ==
8754 argOpers[valArgIndx]->isReg());
8755 assert(argOpers[valArgIndx + 1]->isImm() ==
8756 argOpers[valArgIndx]->isImm());
8757 if (argOpers[valArgIndx + 1]->isReg())
8758 MIB = BuildMI(newMBB, dl, TII->get(regOpcH), t6);
8760 MIB = BuildMI(newMBB, dl, TII->get(immOpcH), t6);
8761 if (regOpcH != X86::MOV32rr)
8763 (*MIB).addOperand(*argOpers[valArgIndx + 1]);
8765 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), X86::EAX);
8767 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), X86::EDX);
8770 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), X86::EBX);
8772 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), X86::ECX);
8775 MIB = BuildMI(newMBB, dl, TII->get(X86::LCMPXCHG8B));
8776 for (int i=0; i <= lastAddrIndx; ++i)
8777 (*MIB).addOperand(*argOpers[i]);
8779 assert(bInstr->hasOneMemOperand() && "Unexpected number of memoperand");
8780 (*MIB).setMemRefs(bInstr->memoperands_begin(),
8781 bInstr->memoperands_end());
8783 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), t3);
8784 MIB.addReg(X86::EAX);
8785 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), t4);
8786 MIB.addReg(X86::EDX);
8789 BuildMI(newMBB, dl, TII->get(X86::JNE_4)).addMBB(newMBB);
8791 bInstr->eraseFromParent(); // The pseudo instruction is gone now.
8795 // private utility function
8797 X86TargetLowering::EmitAtomicMinMaxWithCustomInserter(MachineInstr *mInstr,
8798 MachineBasicBlock *MBB,
8799 unsigned cmovOpc) const {
8800 // For the atomic min/max operator, we generate
8803 // ld t1 = [min/max.addr]
8804 // mov t2 = [min/max.val]
8806 // cmov[cond] t2 = t1
8808 // lcs dest = [bitinstr.addr], t2 [EAX is implicit]
8810 // fallthrough -->nextMBB
8812 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
8813 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
8814 MachineFunction::iterator MBBIter = MBB;
8817 /// First build the CFG
8818 MachineFunction *F = MBB->getParent();
8819 MachineBasicBlock *thisMBB = MBB;
8820 MachineBasicBlock *newMBB = F->CreateMachineBasicBlock(LLVM_BB);
8821 MachineBasicBlock *nextMBB = F->CreateMachineBasicBlock(LLVM_BB);
8822 F->insert(MBBIter, newMBB);
8823 F->insert(MBBIter, nextMBB);
8825 // Transfer the remainder of thisMBB and its successor edges to nextMBB.
8826 nextMBB->splice(nextMBB->begin(), thisMBB,
8827 llvm::next(MachineBasicBlock::iterator(mInstr)),
8829 nextMBB->transferSuccessorsAndUpdatePHIs(thisMBB);
8831 // Update thisMBB to fall through to newMBB
8832 thisMBB->addSuccessor(newMBB);
8834 // newMBB jumps to newMBB and fall through to nextMBB
8835 newMBB->addSuccessor(nextMBB);
8836 newMBB->addSuccessor(newMBB);
8838 DebugLoc dl = mInstr->getDebugLoc();
8839 // Insert instructions into newMBB based on incoming instruction
8840 assert(mInstr->getNumOperands() < X86::AddrNumOperands + 4 &&
8841 "unexpected number of operands");
8842 MachineOperand& destOper = mInstr->getOperand(0);
8843 MachineOperand* argOpers[2 + X86::AddrNumOperands];
8844 int numArgs = mInstr->getNumOperands() - 1;
8845 for (int i=0; i < numArgs; ++i)
8846 argOpers[i] = &mInstr->getOperand(i+1);
8848 // x86 address has 4 operands: base, index, scale, and displacement
8849 int lastAddrIndx = X86::AddrNumOperands - 1; // [0,3]
8850 int valArgIndx = lastAddrIndx + 1;
8852 unsigned t1 = F->getRegInfo().createVirtualRegister(X86::GR32RegisterClass);
8853 MachineInstrBuilder MIB = BuildMI(newMBB, dl, TII->get(X86::MOV32rm), t1);
8854 for (int i=0; i <= lastAddrIndx; ++i)
8855 (*MIB).addOperand(*argOpers[i]);
8857 // We only support register and immediate values
8858 assert((argOpers[valArgIndx]->isReg() ||
8859 argOpers[valArgIndx]->isImm()) &&
8862 unsigned t2 = F->getRegInfo().createVirtualRegister(X86::GR32RegisterClass);
8863 if (argOpers[valArgIndx]->isReg())
8864 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), t2);
8866 MIB = BuildMI(newMBB, dl, TII->get(X86::MOV32rr), t2);
8867 (*MIB).addOperand(*argOpers[valArgIndx]);
8869 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), X86::EAX);
8872 MIB = BuildMI(newMBB, dl, TII->get(X86::CMP32rr));
8877 unsigned t3 = F->getRegInfo().createVirtualRegister(X86::GR32RegisterClass);
8878 MIB = BuildMI(newMBB, dl, TII->get(cmovOpc),t3);
8882 // Cmp and exchange if none has modified the memory location
8883 MIB = BuildMI(newMBB, dl, TII->get(X86::LCMPXCHG32));
8884 for (int i=0; i <= lastAddrIndx; ++i)
8885 (*MIB).addOperand(*argOpers[i]);
8887 assert(mInstr->hasOneMemOperand() && "Unexpected number of memoperand");
8888 (*MIB).setMemRefs(mInstr->memoperands_begin(),
8889 mInstr->memoperands_end());
8891 MIB = BuildMI(newMBB, dl, TII->get(TargetOpcode::COPY), destOper.getReg());
8892 MIB.addReg(X86::EAX);
8895 BuildMI(newMBB, dl, TII->get(X86::JNE_4)).addMBB(newMBB);
8897 mInstr->eraseFromParent(); // The pseudo instruction is gone now.
8901 // FIXME: When we get size specific XMM0 registers, i.e. XMM0_V16I8
8902 // or XMM0_V32I8 in AVX all of this code can be replaced with that
8905 X86TargetLowering::EmitPCMP(MachineInstr *MI, MachineBasicBlock *BB,
8906 unsigned numArgs, bool memArg) const {
8908 assert((Subtarget->hasSSE42() || Subtarget->hasAVX()) &&
8909 "Target must have SSE4.2 or AVX features enabled");
8911 DebugLoc dl = MI->getDebugLoc();
8912 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
8916 if (!Subtarget->hasAVX()) {
8918 Opc = numArgs == 3 ? X86::PCMPISTRM128rm : X86::PCMPESTRM128rm;
8920 Opc = numArgs == 3 ? X86::PCMPISTRM128rr : X86::PCMPESTRM128rr;
8923 Opc = numArgs == 3 ? X86::VPCMPISTRM128rm : X86::VPCMPESTRM128rm;
8925 Opc = numArgs == 3 ? X86::VPCMPISTRM128rr : X86::VPCMPESTRM128rr;
8928 MachineInstrBuilder MIB = BuildMI(BB, dl, TII->get(Opc));
8930 for (unsigned i = 0; i < numArgs; ++i) {
8931 MachineOperand &Op = MI->getOperand(i+1);
8933 if (!(Op.isReg() && Op.isImplicit()))
8937 BuildMI(BB, dl, TII->get(X86::MOVAPSrr), MI->getOperand(0).getReg())
8940 MI->eraseFromParent();
8946 X86TargetLowering::EmitVAStartSaveXMMRegsWithCustomInserter(
8948 MachineBasicBlock *MBB) const {
8949 // Emit code to save XMM registers to the stack. The ABI says that the
8950 // number of registers to save is given in %al, so it's theoretically
8951 // possible to do an indirect jump trick to avoid saving all of them,
8952 // however this code takes a simpler approach and just executes all
8953 // of the stores if %al is non-zero. It's less code, and it's probably
8954 // easier on the hardware branch predictor, and stores aren't all that
8955 // expensive anyway.
8957 // Create the new basic blocks. One block contains all the XMM stores,
8958 // and one block is the final destination regardless of whether any
8959 // stores were performed.
8960 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
8961 MachineFunction *F = MBB->getParent();
8962 MachineFunction::iterator MBBIter = MBB;
8964 MachineBasicBlock *XMMSaveMBB = F->CreateMachineBasicBlock(LLVM_BB);
8965 MachineBasicBlock *EndMBB = F->CreateMachineBasicBlock(LLVM_BB);
8966 F->insert(MBBIter, XMMSaveMBB);
8967 F->insert(MBBIter, EndMBB);
8969 // Transfer the remainder of MBB and its successor edges to EndMBB.
8970 EndMBB->splice(EndMBB->begin(), MBB,
8971 llvm::next(MachineBasicBlock::iterator(MI)),
8973 EndMBB->transferSuccessorsAndUpdatePHIs(MBB);
8975 // The original block will now fall through to the XMM save block.
8976 MBB->addSuccessor(XMMSaveMBB);
8977 // The XMMSaveMBB will fall through to the end block.
8978 XMMSaveMBB->addSuccessor(EndMBB);
8980 // Now add the instructions.
8981 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
8982 DebugLoc DL = MI->getDebugLoc();
8984 unsigned CountReg = MI->getOperand(0).getReg();
8985 int64_t RegSaveFrameIndex = MI->getOperand(1).getImm();
8986 int64_t VarArgsFPOffset = MI->getOperand(2).getImm();
8988 if (!Subtarget->isTargetWin64()) {
8989 // If %al is 0, branch around the XMM save block.
8990 BuildMI(MBB, DL, TII->get(X86::TEST8rr)).addReg(CountReg).addReg(CountReg);
8991 BuildMI(MBB, DL, TII->get(X86::JE_4)).addMBB(EndMBB);
8992 MBB->addSuccessor(EndMBB);
8995 // In the XMM save block, save all the XMM argument registers.
8996 for (int i = 3, e = MI->getNumOperands(); i != e; ++i) {
8997 int64_t Offset = (i - 3) * 16 + VarArgsFPOffset;
8998 MachineMemOperand *MMO =
8999 F->getMachineMemOperand(
9000 PseudoSourceValue::getFixedStack(RegSaveFrameIndex),
9001 MachineMemOperand::MOStore, Offset,
9002 /*Size=*/16, /*Align=*/16);
9003 BuildMI(XMMSaveMBB, DL, TII->get(X86::MOVAPSmr))
9004 .addFrameIndex(RegSaveFrameIndex)
9005 .addImm(/*Scale=*/1)
9006 .addReg(/*IndexReg=*/0)
9007 .addImm(/*Disp=*/Offset)
9008 .addReg(/*Segment=*/0)
9009 .addReg(MI->getOperand(i).getReg())
9010 .addMemOperand(MMO);
9013 MI->eraseFromParent(); // The pseudo instruction is gone now.
9019 X86TargetLowering::EmitLoweredSelect(MachineInstr *MI,
9020 MachineBasicBlock *BB) const {
9021 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
9022 DebugLoc DL = MI->getDebugLoc();
9024 // To "insert" a SELECT_CC instruction, we actually have to insert the
9025 // diamond control-flow pattern. The incoming instruction knows the
9026 // destination vreg to set, the condition code register to branch on, the
9027 // true/false values to select between, and a branch opcode to use.
9028 const BasicBlock *LLVM_BB = BB->getBasicBlock();
9029 MachineFunction::iterator It = BB;
9035 // cmpTY ccX, r1, r2
9037 // fallthrough --> copy0MBB
9038 MachineBasicBlock *thisMBB = BB;
9039 MachineFunction *F = BB->getParent();
9040 MachineBasicBlock *copy0MBB = F->CreateMachineBasicBlock(LLVM_BB);
9041 MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB);
9042 F->insert(It, copy0MBB);
9043 F->insert(It, sinkMBB);
9045 // If the EFLAGS register isn't dead in the terminator, then claim that it's
9046 // live into the sink and copy blocks.
9047 const MachineFunction *MF = BB->getParent();
9048 const TargetRegisterInfo *TRI = MF->getTarget().getRegisterInfo();
9049 BitVector ReservedRegs = TRI->getReservedRegs(*MF);
9051 for (unsigned I = 0, E = MI->getNumOperands(); I != E; ++I) {
9052 const MachineOperand &MO = MI->getOperand(I);
9053 if (!MO.isReg() || !MO.isUse() || MO.isKill()) continue;
9054 unsigned Reg = MO.getReg();
9055 if (Reg != X86::EFLAGS) continue;
9056 copy0MBB->addLiveIn(Reg);
9057 sinkMBB->addLiveIn(Reg);
9060 // Transfer the remainder of BB and its successor edges to sinkMBB.
9061 sinkMBB->splice(sinkMBB->begin(), BB,
9062 llvm::next(MachineBasicBlock::iterator(MI)),
9064 sinkMBB->transferSuccessorsAndUpdatePHIs(BB);
9066 // Add the true and fallthrough blocks as its successors.
9067 BB->addSuccessor(copy0MBB);
9068 BB->addSuccessor(sinkMBB);
9070 // Create the conditional branch instruction.
9072 X86::GetCondBranchFromCond((X86::CondCode)MI->getOperand(3).getImm());
9073 BuildMI(BB, DL, TII->get(Opc)).addMBB(sinkMBB);
9076 // %FalseValue = ...
9077 // # fallthrough to sinkMBB
9078 copy0MBB->addSuccessor(sinkMBB);
9081 // %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
9083 BuildMI(*sinkMBB, sinkMBB->begin(), DL,
9084 TII->get(X86::PHI), MI->getOperand(0).getReg())
9085 .addReg(MI->getOperand(1).getReg()).addMBB(copy0MBB)
9086 .addReg(MI->getOperand(2).getReg()).addMBB(thisMBB);
9088 MI->eraseFromParent(); // The pseudo instruction is gone now.
9093 X86TargetLowering::EmitLoweredMingwAlloca(MachineInstr *MI,
9094 MachineBasicBlock *BB) const {
9095 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
9096 DebugLoc DL = MI->getDebugLoc();
9098 // The lowering is pretty easy: we're just emitting the call to _alloca. The
9099 // non-trivial part is impdef of ESP.
9100 // FIXME: The code should be tweaked as soon as we'll try to do codegen for
9103 BuildMI(*BB, MI, DL, TII->get(X86::CALLpcrel32))
9104 .addExternalSymbol("_alloca")
9105 .addReg(X86::EAX, RegState::Implicit)
9106 .addReg(X86::ESP, RegState::Implicit)
9107 .addReg(X86::EAX, RegState::Define | RegState::Implicit)
9108 .addReg(X86::ESP, RegState::Define | RegState::Implicit)
9109 .addReg(X86::EFLAGS, RegState::Define | RegState::Implicit);
9111 MI->eraseFromParent(); // The pseudo instruction is gone now.
9116 X86TargetLowering::EmitLoweredTLSCall(MachineInstr *MI,
9117 MachineBasicBlock *BB) const {
9118 // This is pretty easy. We're taking the value that we received from
9119 // our load from the relocation, sticking it in either RDI (x86-64)
9120 // or EAX and doing an indirect call. The return value will then
9121 // be in the normal return register.
9122 const X86InstrInfo *TII
9123 = static_cast<const X86InstrInfo*>(getTargetMachine().getInstrInfo());
9124 DebugLoc DL = MI->getDebugLoc();
9125 MachineFunction *F = BB->getParent();
9126 bool IsWin64 = Subtarget->isTargetWin64();
9128 assert(MI->getOperand(3).isGlobal() && "This should be a global");
9130 if (Subtarget->is64Bit()) {
9131 MachineInstrBuilder MIB = BuildMI(*BB, MI, DL,
9132 TII->get(X86::MOV64rm), X86::RDI)
9134 .addImm(0).addReg(0)
9135 .addGlobalAddress(MI->getOperand(3).getGlobal(), 0,
9136 MI->getOperand(3).getTargetFlags())
9138 MIB = BuildMI(*BB, MI, DL, TII->get(IsWin64 ? X86::WINCALL64m : X86::CALL64m));
9139 addDirectMem(MIB, X86::RDI);
9140 } else if (getTargetMachine().getRelocationModel() != Reloc::PIC_) {
9141 MachineInstrBuilder MIB = BuildMI(*BB, MI, DL,
9142 TII->get(X86::MOV32rm), X86::EAX)
9144 .addImm(0).addReg(0)
9145 .addGlobalAddress(MI->getOperand(3).getGlobal(), 0,
9146 MI->getOperand(3).getTargetFlags())
9148 MIB = BuildMI(*BB, MI, DL, TII->get(X86::CALL32m));
9149 addDirectMem(MIB, X86::EAX);
9151 MachineInstrBuilder MIB = BuildMI(*BB, MI, DL,
9152 TII->get(X86::MOV32rm), X86::EAX)
9153 .addReg(TII->getGlobalBaseReg(F))
9154 .addImm(0).addReg(0)
9155 .addGlobalAddress(MI->getOperand(3).getGlobal(), 0,
9156 MI->getOperand(3).getTargetFlags())
9158 MIB = BuildMI(*BB, MI, DL, TII->get(X86::CALL32m));
9159 addDirectMem(MIB, X86::EAX);
9162 MI->eraseFromParent(); // The pseudo instruction is gone now.
9167 X86TargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
9168 MachineBasicBlock *BB) const {
9169 switch (MI->getOpcode()) {
9170 default: assert(false && "Unexpected instr type to insert");
9171 case X86::MINGW_ALLOCA:
9172 return EmitLoweredMingwAlloca(MI, BB);
9173 case X86::TLSCall_32:
9174 case X86::TLSCall_64:
9175 return EmitLoweredTLSCall(MI, BB);
9177 case X86::CMOV_V1I64:
9178 case X86::CMOV_FR32:
9179 case X86::CMOV_FR64:
9180 case X86::CMOV_V4F32:
9181 case X86::CMOV_V2F64:
9182 case X86::CMOV_V2I64:
9183 case X86::CMOV_GR16:
9184 case X86::CMOV_GR32:
9185 case X86::CMOV_RFP32:
9186 case X86::CMOV_RFP64:
9187 case X86::CMOV_RFP80:
9188 return EmitLoweredSelect(MI, BB);
9190 case X86::FP32_TO_INT16_IN_MEM:
9191 case X86::FP32_TO_INT32_IN_MEM:
9192 case X86::FP32_TO_INT64_IN_MEM:
9193 case X86::FP64_TO_INT16_IN_MEM:
9194 case X86::FP64_TO_INT32_IN_MEM:
9195 case X86::FP64_TO_INT64_IN_MEM:
9196 case X86::FP80_TO_INT16_IN_MEM:
9197 case X86::FP80_TO_INT32_IN_MEM:
9198 case X86::FP80_TO_INT64_IN_MEM: {
9199 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
9200 DebugLoc DL = MI->getDebugLoc();
9202 // Change the floating point control register to use "round towards zero"
9203 // mode when truncating to an integer value.
9204 MachineFunction *F = BB->getParent();
9205 int CWFrameIdx = F->getFrameInfo()->CreateStackObject(2, 2, false);
9206 addFrameReference(BuildMI(*BB, MI, DL,
9207 TII->get(X86::FNSTCW16m)), CWFrameIdx);
9209 // Load the old value of the high byte of the control word...
9211 F->getRegInfo().createVirtualRegister(X86::GR16RegisterClass);
9212 addFrameReference(BuildMI(*BB, MI, DL, TII->get(X86::MOV16rm), OldCW),
9215 // Set the high part to be round to zero...
9216 addFrameReference(BuildMI(*BB, MI, DL, TII->get(X86::MOV16mi)), CWFrameIdx)
9219 // Reload the modified control word now...
9220 addFrameReference(BuildMI(*BB, MI, DL,
9221 TII->get(X86::FLDCW16m)), CWFrameIdx);
9223 // Restore the memory image of control word to original value
9224 addFrameReference(BuildMI(*BB, MI, DL, TII->get(X86::MOV16mr)), CWFrameIdx)
9227 // Get the X86 opcode to use.
9229 switch (MI->getOpcode()) {
9230 default: llvm_unreachable("illegal opcode!");
9231 case X86::FP32_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m32; break;
9232 case X86::FP32_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m32; break;
9233 case X86::FP32_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m32; break;
9234 case X86::FP64_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m64; break;
9235 case X86::FP64_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m64; break;
9236 case X86::FP64_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m64; break;
9237 case X86::FP80_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m80; break;
9238 case X86::FP80_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m80; break;
9239 case X86::FP80_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m80; break;
9243 MachineOperand &Op = MI->getOperand(0);
9245 AM.BaseType = X86AddressMode::RegBase;
9246 AM.Base.Reg = Op.getReg();
9248 AM.BaseType = X86AddressMode::FrameIndexBase;
9249 AM.Base.FrameIndex = Op.getIndex();
9251 Op = MI->getOperand(1);
9253 AM.Scale = Op.getImm();
9254 Op = MI->getOperand(2);
9256 AM.IndexReg = Op.getImm();
9257 Op = MI->getOperand(3);
9258 if (Op.isGlobal()) {
9259 AM.GV = Op.getGlobal();
9261 AM.Disp = Op.getImm();
9263 addFullAddress(BuildMI(*BB, MI, DL, TII->get(Opc)), AM)
9264 .addReg(MI->getOperand(X86::AddrNumOperands).getReg());
9266 // Reload the original control word now.
9267 addFrameReference(BuildMI(*BB, MI, DL,
9268 TII->get(X86::FLDCW16m)), CWFrameIdx);
9270 MI->eraseFromParent(); // The pseudo instruction is gone now.
9273 // String/text processing lowering.
9274 case X86::PCMPISTRM128REG:
9275 case X86::VPCMPISTRM128REG:
9276 return EmitPCMP(MI, BB, 3, false /* in-mem */);
9277 case X86::PCMPISTRM128MEM:
9278 case X86::VPCMPISTRM128MEM:
9279 return EmitPCMP(MI, BB, 3, true /* in-mem */);
9280 case X86::PCMPESTRM128REG:
9281 case X86::VPCMPESTRM128REG:
9282 return EmitPCMP(MI, BB, 5, false /* in mem */);
9283 case X86::PCMPESTRM128MEM:
9284 case X86::VPCMPESTRM128MEM:
9285 return EmitPCMP(MI, BB, 5, true /* in mem */);
9288 case X86::ATOMAND32:
9289 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND32rr,
9290 X86::AND32ri, X86::MOV32rm,
9292 X86::NOT32r, X86::EAX,
9293 X86::GR32RegisterClass);
9295 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::OR32rr,
9296 X86::OR32ri, X86::MOV32rm,
9298 X86::NOT32r, X86::EAX,
9299 X86::GR32RegisterClass);
9300 case X86::ATOMXOR32:
9301 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::XOR32rr,
9302 X86::XOR32ri, X86::MOV32rm,
9304 X86::NOT32r, X86::EAX,
9305 X86::GR32RegisterClass);
9306 case X86::ATOMNAND32:
9307 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND32rr,
9308 X86::AND32ri, X86::MOV32rm,
9310 X86::NOT32r, X86::EAX,
9311 X86::GR32RegisterClass, true);
9312 case X86::ATOMMIN32:
9313 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVL32rr);
9314 case X86::ATOMMAX32:
9315 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVG32rr);
9316 case X86::ATOMUMIN32:
9317 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVB32rr);
9318 case X86::ATOMUMAX32:
9319 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVA32rr);
9321 case X86::ATOMAND16:
9322 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND16rr,
9323 X86::AND16ri, X86::MOV16rm,
9325 X86::NOT16r, X86::AX,
9326 X86::GR16RegisterClass);
9328 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::OR16rr,
9329 X86::OR16ri, X86::MOV16rm,
9331 X86::NOT16r, X86::AX,
9332 X86::GR16RegisterClass);
9333 case X86::ATOMXOR16:
9334 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::XOR16rr,
9335 X86::XOR16ri, X86::MOV16rm,
9337 X86::NOT16r, X86::AX,
9338 X86::GR16RegisterClass);
9339 case X86::ATOMNAND16:
9340 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND16rr,
9341 X86::AND16ri, X86::MOV16rm,
9343 X86::NOT16r, X86::AX,
9344 X86::GR16RegisterClass, true);
9345 case X86::ATOMMIN16:
9346 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVL16rr);
9347 case X86::ATOMMAX16:
9348 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVG16rr);
9349 case X86::ATOMUMIN16:
9350 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVB16rr);
9351 case X86::ATOMUMAX16:
9352 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVA16rr);
9355 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND8rr,
9356 X86::AND8ri, X86::MOV8rm,
9358 X86::NOT8r, X86::AL,
9359 X86::GR8RegisterClass);
9361 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::OR8rr,
9362 X86::OR8ri, X86::MOV8rm,
9364 X86::NOT8r, X86::AL,
9365 X86::GR8RegisterClass);
9367 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::XOR8rr,
9368 X86::XOR8ri, X86::MOV8rm,
9370 X86::NOT8r, X86::AL,
9371 X86::GR8RegisterClass);
9372 case X86::ATOMNAND8:
9373 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND8rr,
9374 X86::AND8ri, X86::MOV8rm,
9376 X86::NOT8r, X86::AL,
9377 X86::GR8RegisterClass, true);
9378 // FIXME: There are no CMOV8 instructions; MIN/MAX need some other way.
9379 // This group is for 64-bit host.
9380 case X86::ATOMAND64:
9381 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND64rr,
9382 X86::AND64ri32, X86::MOV64rm,
9384 X86::NOT64r, X86::RAX,
9385 X86::GR64RegisterClass);
9387 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::OR64rr,
9388 X86::OR64ri32, X86::MOV64rm,
9390 X86::NOT64r, X86::RAX,
9391 X86::GR64RegisterClass);
9392 case X86::ATOMXOR64:
9393 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::XOR64rr,
9394 X86::XOR64ri32, X86::MOV64rm,
9396 X86::NOT64r, X86::RAX,
9397 X86::GR64RegisterClass);
9398 case X86::ATOMNAND64:
9399 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND64rr,
9400 X86::AND64ri32, X86::MOV64rm,
9402 X86::NOT64r, X86::RAX,
9403 X86::GR64RegisterClass, true);
9404 case X86::ATOMMIN64:
9405 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVL64rr);
9406 case X86::ATOMMAX64:
9407 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVG64rr);
9408 case X86::ATOMUMIN64:
9409 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVB64rr);
9410 case X86::ATOMUMAX64:
9411 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVA64rr);
9413 // This group does 64-bit operations on a 32-bit host.
9414 case X86::ATOMAND6432:
9415 return EmitAtomicBit6432WithCustomInserter(MI, BB,
9416 X86::AND32rr, X86::AND32rr,
9417 X86::AND32ri, X86::AND32ri,
9419 case X86::ATOMOR6432:
9420 return EmitAtomicBit6432WithCustomInserter(MI, BB,
9421 X86::OR32rr, X86::OR32rr,
9422 X86::OR32ri, X86::OR32ri,
9424 case X86::ATOMXOR6432:
9425 return EmitAtomicBit6432WithCustomInserter(MI, BB,
9426 X86::XOR32rr, X86::XOR32rr,
9427 X86::XOR32ri, X86::XOR32ri,
9429 case X86::ATOMNAND6432:
9430 return EmitAtomicBit6432WithCustomInserter(MI, BB,
9431 X86::AND32rr, X86::AND32rr,
9432 X86::AND32ri, X86::AND32ri,
9434 case X86::ATOMADD6432:
9435 return EmitAtomicBit6432WithCustomInserter(MI, BB,
9436 X86::ADD32rr, X86::ADC32rr,
9437 X86::ADD32ri, X86::ADC32ri,
9439 case X86::ATOMSUB6432:
9440 return EmitAtomicBit6432WithCustomInserter(MI, BB,
9441 X86::SUB32rr, X86::SBB32rr,
9442 X86::SUB32ri, X86::SBB32ri,
9444 case X86::ATOMSWAP6432:
9445 return EmitAtomicBit6432WithCustomInserter(MI, BB,
9446 X86::MOV32rr, X86::MOV32rr,
9447 X86::MOV32ri, X86::MOV32ri,
9449 case X86::VASTART_SAVE_XMM_REGS:
9450 return EmitVAStartSaveXMMRegsWithCustomInserter(MI, BB);
9454 //===----------------------------------------------------------------------===//
9455 // X86 Optimization Hooks
9456 //===----------------------------------------------------------------------===//
9458 void X86TargetLowering::computeMaskedBitsForTargetNode(const SDValue Op,
9462 const SelectionDAG &DAG,
9463 unsigned Depth) const {
9464 unsigned Opc = Op.getOpcode();
9465 assert((Opc >= ISD::BUILTIN_OP_END ||
9466 Opc == ISD::INTRINSIC_WO_CHAIN ||
9467 Opc == ISD::INTRINSIC_W_CHAIN ||
9468 Opc == ISD::INTRINSIC_VOID) &&
9469 "Should use MaskedValueIsZero if you don't know whether Op"
9470 " is a target node!");
9472 KnownZero = KnownOne = APInt(Mask.getBitWidth(), 0); // Don't know anything.
9484 // These nodes' second result is a boolean.
9485 if (Op.getResNo() == 0)
9489 KnownZero |= APInt::getHighBitsSet(Mask.getBitWidth(),
9490 Mask.getBitWidth() - 1);
9495 /// isGAPlusOffset - Returns true (and the GlobalValue and the offset) if the
9496 /// node is a GlobalAddress + offset.
9497 bool X86TargetLowering::isGAPlusOffset(SDNode *N,
9498 const GlobalValue* &GA,
9499 int64_t &Offset) const {
9500 if (N->getOpcode() == X86ISD::Wrapper) {
9501 if (isa<GlobalAddressSDNode>(N->getOperand(0))) {
9502 GA = cast<GlobalAddressSDNode>(N->getOperand(0))->getGlobal();
9503 Offset = cast<GlobalAddressSDNode>(N->getOperand(0))->getOffset();
9507 return TargetLowering::isGAPlusOffset(N, GA, Offset);
9510 /// PerformShuffleCombine - Combine a vector_shuffle that is equal to
9511 /// build_vector load1, load2, load3, load4, <0, 1, 2, 3> into a 128-bit load
9512 /// if the load addresses are consecutive, non-overlapping, and in the right
9514 static SDValue PerformShuffleCombine(SDNode *N, SelectionDAG &DAG,
9515 const TargetLowering &TLI) {
9516 DebugLoc dl = N->getDebugLoc();
9517 EVT VT = N->getValueType(0);
9519 if (VT.getSizeInBits() != 128)
9522 SmallVector<SDValue, 16> Elts;
9523 for (unsigned i = 0, e = VT.getVectorNumElements(); i != e; ++i)
9524 Elts.push_back(getShuffleScalarElt(N, i, DAG));
9526 return EltsFromConsecutiveLoads(VT, Elts, dl, DAG);
9529 /// PerformShuffleCombine - Detect vector gather/scatter index generation
9530 /// and convert it from being a bunch of shuffles and extracts to a simple
9531 /// store and scalar loads to extract the elements.
9532 static SDValue PerformEXTRACT_VECTOR_ELTCombine(SDNode *N, SelectionDAG &DAG,
9533 const TargetLowering &TLI) {
9534 SDValue InputVector = N->getOperand(0);
9536 // Only operate on vectors of 4 elements, where the alternative shuffling
9537 // gets to be more expensive.
9538 if (InputVector.getValueType() != MVT::v4i32)
9541 // Check whether every use of InputVector is an EXTRACT_VECTOR_ELT with a
9542 // single use which is a sign-extend or zero-extend, and all elements are
9544 SmallVector<SDNode *, 4> Uses;
9545 unsigned ExtractedElements = 0;
9546 for (SDNode::use_iterator UI = InputVector.getNode()->use_begin(),
9547 UE = InputVector.getNode()->use_end(); UI != UE; ++UI) {
9548 if (UI.getUse().getResNo() != InputVector.getResNo())
9551 SDNode *Extract = *UI;
9552 if (Extract->getOpcode() != ISD::EXTRACT_VECTOR_ELT)
9555 if (Extract->getValueType(0) != MVT::i32)
9557 if (!Extract->hasOneUse())
9559 if (Extract->use_begin()->getOpcode() != ISD::SIGN_EXTEND &&
9560 Extract->use_begin()->getOpcode() != ISD::ZERO_EXTEND)
9562 if (!isa<ConstantSDNode>(Extract->getOperand(1)))
9565 // Record which element was extracted.
9566 ExtractedElements |=
9567 1 << cast<ConstantSDNode>(Extract->getOperand(1))->getZExtValue();
9569 Uses.push_back(Extract);
9572 // If not all the elements were used, this may not be worthwhile.
9573 if (ExtractedElements != 15)
9576 // Ok, we've now decided to do the transformation.
9577 DebugLoc dl = InputVector.getDebugLoc();
9579 // Store the value to a temporary stack slot.
9580 SDValue StackPtr = DAG.CreateStackTemporary(InputVector.getValueType());
9581 SDValue Ch = DAG.getStore(DAG.getEntryNode(), dl, InputVector, StackPtr, NULL,
9582 0, false, false, 0);
9584 // Replace each use (extract) with a load of the appropriate element.
9585 for (SmallVectorImpl<SDNode *>::iterator UI = Uses.begin(),
9586 UE = Uses.end(); UI != UE; ++UI) {
9587 SDNode *Extract = *UI;
9589 // Compute the element's address.
9590 SDValue Idx = Extract->getOperand(1);
9592 InputVector.getValueType().getVectorElementType().getSizeInBits()/8;
9593 uint64_t Offset = EltSize * cast<ConstantSDNode>(Idx)->getZExtValue();
9594 SDValue OffsetVal = DAG.getConstant(Offset, TLI.getPointerTy());
9596 SDValue ScalarAddr = DAG.getNode(ISD::ADD, dl, Idx.getValueType(),
9597 OffsetVal, StackPtr);
9600 SDValue LoadScalar = DAG.getLoad(Extract->getValueType(0), dl, Ch,
9601 ScalarAddr, NULL, 0, false, false, 0);
9603 // Replace the exact with the load.
9604 DAG.ReplaceAllUsesOfValueWith(SDValue(Extract, 0), LoadScalar);
9607 // The replacement was made in place; don't return anything.
9611 /// PerformSELECTCombine - Do target-specific dag combines on SELECT nodes.
9612 static SDValue PerformSELECTCombine(SDNode *N, SelectionDAG &DAG,
9613 const X86Subtarget *Subtarget) {
9614 DebugLoc DL = N->getDebugLoc();
9615 SDValue Cond = N->getOperand(0);
9616 // Get the LHS/RHS of the select.
9617 SDValue LHS = N->getOperand(1);
9618 SDValue RHS = N->getOperand(2);
9620 // If we have SSE[12] support, try to form min/max nodes. SSE min/max
9621 // instructions match the semantics of the common C idiom x<y?x:y but not
9622 // x<=y?x:y, because of how they handle negative zero (which can be
9623 // ignored in unsafe-math mode).
9624 if (Subtarget->hasSSE2() &&
9625 (LHS.getValueType() == MVT::f32 || LHS.getValueType() == MVT::f64) &&
9626 Cond.getOpcode() == ISD::SETCC) {
9627 ISD::CondCode CC = cast<CondCodeSDNode>(Cond.getOperand(2))->get();
9629 unsigned Opcode = 0;
9630 // Check for x CC y ? x : y.
9631 if (DAG.isEqualTo(LHS, Cond.getOperand(0)) &&
9632 DAG.isEqualTo(RHS, Cond.getOperand(1))) {
9636 // Converting this to a min would handle NaNs incorrectly, and swapping
9637 // the operands would cause it to handle comparisons between positive
9638 // and negative zero incorrectly.
9639 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS)) {
9640 if (!UnsafeFPMath &&
9641 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS)))
9643 std::swap(LHS, RHS);
9645 Opcode = X86ISD::FMIN;
9648 // Converting this to a min would handle comparisons between positive
9649 // and negative zero incorrectly.
9650 if (!UnsafeFPMath &&
9651 !DAG.isKnownNeverZero(LHS) && !DAG.isKnownNeverZero(RHS))
9653 Opcode = X86ISD::FMIN;
9656 // Converting this to a min would handle both negative zeros and NaNs
9657 // incorrectly, but we can swap the operands to fix both.
9658 std::swap(LHS, RHS);
9662 Opcode = X86ISD::FMIN;
9666 // Converting this to a max would handle comparisons between positive
9667 // and negative zero incorrectly.
9668 if (!UnsafeFPMath &&
9669 !DAG.isKnownNeverZero(LHS) && !DAG.isKnownNeverZero(LHS))
9671 Opcode = X86ISD::FMAX;
9674 // Converting this to a max would handle NaNs incorrectly, and swapping
9675 // the operands would cause it to handle comparisons between positive
9676 // and negative zero incorrectly.
9677 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS)) {
9678 if (!UnsafeFPMath &&
9679 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS)))
9681 std::swap(LHS, RHS);
9683 Opcode = X86ISD::FMAX;
9686 // Converting this to a max would handle both negative zeros and NaNs
9687 // incorrectly, but we can swap the operands to fix both.
9688 std::swap(LHS, RHS);
9692 Opcode = X86ISD::FMAX;
9695 // Check for x CC y ? y : x -- a min/max with reversed arms.
9696 } else if (DAG.isEqualTo(LHS, Cond.getOperand(1)) &&
9697 DAG.isEqualTo(RHS, Cond.getOperand(0))) {
9701 // Converting this to a min would handle comparisons between positive
9702 // and negative zero incorrectly, and swapping the operands would
9703 // cause it to handle NaNs incorrectly.
9704 if (!UnsafeFPMath &&
9705 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS))) {
9706 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS))
9708 std::swap(LHS, RHS);
9710 Opcode = X86ISD::FMIN;
9713 // Converting this to a min would handle NaNs incorrectly.
9714 if (!UnsafeFPMath &&
9715 (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS)))
9717 Opcode = X86ISD::FMIN;
9720 // Converting this to a min would handle both negative zeros and NaNs
9721 // incorrectly, but we can swap the operands to fix both.
9722 std::swap(LHS, RHS);
9726 Opcode = X86ISD::FMIN;
9730 // Converting this to a max would handle NaNs incorrectly.
9731 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS))
9733 Opcode = X86ISD::FMAX;
9736 // Converting this to a max would handle comparisons between positive
9737 // and negative zero incorrectly, and swapping the operands would
9738 // cause it to handle NaNs incorrectly.
9739 if (!UnsafeFPMath &&
9740 !DAG.isKnownNeverZero(LHS) && !DAG.isKnownNeverZero(RHS)) {
9741 if (!DAG.isKnownNeverNaN(LHS) || !DAG.isKnownNeverNaN(RHS))
9743 std::swap(LHS, RHS);
9745 Opcode = X86ISD::FMAX;
9748 // Converting this to a max would handle both negative zeros and NaNs
9749 // incorrectly, but we can swap the operands to fix both.
9750 std::swap(LHS, RHS);
9754 Opcode = X86ISD::FMAX;
9760 return DAG.getNode(Opcode, DL, N->getValueType(0), LHS, RHS);
9763 // If this is a select between two integer constants, try to do some
9765 if (ConstantSDNode *TrueC = dyn_cast<ConstantSDNode>(LHS)) {
9766 if (ConstantSDNode *FalseC = dyn_cast<ConstantSDNode>(RHS))
9767 // Don't do this for crazy integer types.
9768 if (DAG.getTargetLoweringInfo().isTypeLegal(LHS.getValueType())) {
9769 // If this is efficiently invertible, canonicalize the LHSC/RHSC values
9770 // so that TrueC (the true value) is larger than FalseC.
9771 bool NeedsCondInvert = false;
9773 if (TrueC->getAPIntValue().ult(FalseC->getAPIntValue()) &&
9774 // Efficiently invertible.
9775 (Cond.getOpcode() == ISD::SETCC || // setcc -> invertible.
9776 (Cond.getOpcode() == ISD::XOR && // xor(X, C) -> invertible.
9777 isa<ConstantSDNode>(Cond.getOperand(1))))) {
9778 NeedsCondInvert = true;
9779 std::swap(TrueC, FalseC);
9782 // Optimize C ? 8 : 0 -> zext(C) << 3. Likewise for any pow2/0.
9783 if (FalseC->getAPIntValue() == 0 &&
9784 TrueC->getAPIntValue().isPowerOf2()) {
9785 if (NeedsCondInvert) // Invert the condition if needed.
9786 Cond = DAG.getNode(ISD::XOR, DL, Cond.getValueType(), Cond,
9787 DAG.getConstant(1, Cond.getValueType()));
9789 // Zero extend the condition if needed.
9790 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, LHS.getValueType(), Cond);
9792 unsigned ShAmt = TrueC->getAPIntValue().logBase2();
9793 return DAG.getNode(ISD::SHL, DL, LHS.getValueType(), Cond,
9794 DAG.getConstant(ShAmt, MVT::i8));
9797 // Optimize Cond ? cst+1 : cst -> zext(setcc(C)+cst.
9798 if (FalseC->getAPIntValue()+1 == TrueC->getAPIntValue()) {
9799 if (NeedsCondInvert) // Invert the condition if needed.
9800 Cond = DAG.getNode(ISD::XOR, DL, Cond.getValueType(), Cond,
9801 DAG.getConstant(1, Cond.getValueType()));
9803 // Zero extend the condition if needed.
9804 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL,
9805 FalseC->getValueType(0), Cond);
9806 return DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond,
9807 SDValue(FalseC, 0));
9810 // Optimize cases that will turn into an LEA instruction. This requires
9811 // an i32 or i64 and an efficient multiplier (1, 2, 3, 4, 5, 8, 9).
9812 if (N->getValueType(0) == MVT::i32 || N->getValueType(0) == MVT::i64) {
9813 uint64_t Diff = TrueC->getZExtValue()-FalseC->getZExtValue();
9814 if (N->getValueType(0) == MVT::i32) Diff = (unsigned)Diff;
9816 bool isFastMultiplier = false;
9818 switch ((unsigned char)Diff) {
9820 case 1: // result = add base, cond
9821 case 2: // result = lea base( , cond*2)
9822 case 3: // result = lea base(cond, cond*2)
9823 case 4: // result = lea base( , cond*4)
9824 case 5: // result = lea base(cond, cond*4)
9825 case 8: // result = lea base( , cond*8)
9826 case 9: // result = lea base(cond, cond*8)
9827 isFastMultiplier = true;
9832 if (isFastMultiplier) {
9833 APInt Diff = TrueC->getAPIntValue()-FalseC->getAPIntValue();
9834 if (NeedsCondInvert) // Invert the condition if needed.
9835 Cond = DAG.getNode(ISD::XOR, DL, Cond.getValueType(), Cond,
9836 DAG.getConstant(1, Cond.getValueType()));
9838 // Zero extend the condition if needed.
9839 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, FalseC->getValueType(0),
9841 // Scale the condition by the difference.
9843 Cond = DAG.getNode(ISD::MUL, DL, Cond.getValueType(), Cond,
9844 DAG.getConstant(Diff, Cond.getValueType()));
9846 // Add the base if non-zero.
9847 if (FalseC->getAPIntValue() != 0)
9848 Cond = DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond,
9849 SDValue(FalseC, 0));
9859 /// Optimize X86ISD::CMOV [LHS, RHS, CONDCODE (e.g. X86::COND_NE), CONDVAL]
9860 static SDValue PerformCMOVCombine(SDNode *N, SelectionDAG &DAG,
9861 TargetLowering::DAGCombinerInfo &DCI) {
9862 DebugLoc DL = N->getDebugLoc();
9864 // If the flag operand isn't dead, don't touch this CMOV.
9865 if (N->getNumValues() == 2 && !SDValue(N, 1).use_empty())
9868 // If this is a select between two integer constants, try to do some
9869 // optimizations. Note that the operands are ordered the opposite of SELECT
9871 if (ConstantSDNode *TrueC = dyn_cast<ConstantSDNode>(N->getOperand(1))) {
9872 if (ConstantSDNode *FalseC = dyn_cast<ConstantSDNode>(N->getOperand(0))) {
9873 // Canonicalize the TrueC/FalseC values so that TrueC (the true value) is
9874 // larger than FalseC (the false value).
9875 X86::CondCode CC = (X86::CondCode)N->getConstantOperandVal(2);
9877 if (TrueC->getAPIntValue().ult(FalseC->getAPIntValue())) {
9878 CC = X86::GetOppositeBranchCondition(CC);
9879 std::swap(TrueC, FalseC);
9882 // Optimize C ? 8 : 0 -> zext(setcc(C)) << 3. Likewise for any pow2/0.
9883 // This is efficient for any integer data type (including i8/i16) and
9885 if (FalseC->getAPIntValue() == 0 && TrueC->getAPIntValue().isPowerOf2()) {
9886 SDValue Cond = N->getOperand(3);
9887 Cond = DAG.getNode(X86ISD::SETCC, DL, MVT::i8,
9888 DAG.getConstant(CC, MVT::i8), Cond);
9890 // Zero extend the condition if needed.
9891 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, TrueC->getValueType(0), Cond);
9893 unsigned ShAmt = TrueC->getAPIntValue().logBase2();
9894 Cond = DAG.getNode(ISD::SHL, DL, Cond.getValueType(), Cond,
9895 DAG.getConstant(ShAmt, MVT::i8));
9896 if (N->getNumValues() == 2) // Dead flag value?
9897 return DCI.CombineTo(N, Cond, SDValue());
9901 // Optimize Cond ? cst+1 : cst -> zext(setcc(C)+cst. This is efficient
9902 // for any integer data type, including i8/i16.
9903 if (FalseC->getAPIntValue()+1 == TrueC->getAPIntValue()) {
9904 SDValue Cond = N->getOperand(3);
9905 Cond = DAG.getNode(X86ISD::SETCC, DL, MVT::i8,
9906 DAG.getConstant(CC, MVT::i8), Cond);
9908 // Zero extend the condition if needed.
9909 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL,
9910 FalseC->getValueType(0), Cond);
9911 Cond = DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond,
9912 SDValue(FalseC, 0));
9914 if (N->getNumValues() == 2) // Dead flag value?
9915 return DCI.CombineTo(N, Cond, SDValue());
9919 // Optimize cases that will turn into an LEA instruction. This requires
9920 // an i32 or i64 and an efficient multiplier (1, 2, 3, 4, 5, 8, 9).
9921 if (N->getValueType(0) == MVT::i32 || N->getValueType(0) == MVT::i64) {
9922 uint64_t Diff = TrueC->getZExtValue()-FalseC->getZExtValue();
9923 if (N->getValueType(0) == MVT::i32) Diff = (unsigned)Diff;
9925 bool isFastMultiplier = false;
9927 switch ((unsigned char)Diff) {
9929 case 1: // result = add base, cond
9930 case 2: // result = lea base( , cond*2)
9931 case 3: // result = lea base(cond, cond*2)
9932 case 4: // result = lea base( , cond*4)
9933 case 5: // result = lea base(cond, cond*4)
9934 case 8: // result = lea base( , cond*8)
9935 case 9: // result = lea base(cond, cond*8)
9936 isFastMultiplier = true;
9941 if (isFastMultiplier) {
9942 APInt Diff = TrueC->getAPIntValue()-FalseC->getAPIntValue();
9943 SDValue Cond = N->getOperand(3);
9944 Cond = DAG.getNode(X86ISD::SETCC, DL, MVT::i8,
9945 DAG.getConstant(CC, MVT::i8), Cond);
9946 // Zero extend the condition if needed.
9947 Cond = DAG.getNode(ISD::ZERO_EXTEND, DL, FalseC->getValueType(0),
9949 // Scale the condition by the difference.
9951 Cond = DAG.getNode(ISD::MUL, DL, Cond.getValueType(), Cond,
9952 DAG.getConstant(Diff, Cond.getValueType()));
9954 // Add the base if non-zero.
9955 if (FalseC->getAPIntValue() != 0)
9956 Cond = DAG.getNode(ISD::ADD, DL, Cond.getValueType(), Cond,
9957 SDValue(FalseC, 0));
9958 if (N->getNumValues() == 2) // Dead flag value?
9959 return DCI.CombineTo(N, Cond, SDValue());
9969 /// PerformMulCombine - Optimize a single multiply with constant into two
9970 /// in order to implement it with two cheaper instructions, e.g.
9971 /// LEA + SHL, LEA + LEA.
9972 static SDValue PerformMulCombine(SDNode *N, SelectionDAG &DAG,
9973 TargetLowering::DAGCombinerInfo &DCI) {
9974 if (DCI.isBeforeLegalize() || DCI.isCalledByLegalizer())
9977 EVT VT = N->getValueType(0);
9981 ConstantSDNode *C = dyn_cast<ConstantSDNode>(N->getOperand(1));
9984 uint64_t MulAmt = C->getZExtValue();
9985 if (isPowerOf2_64(MulAmt) || MulAmt == 3 || MulAmt == 5 || MulAmt == 9)
9988 uint64_t MulAmt1 = 0;
9989 uint64_t MulAmt2 = 0;
9990 if ((MulAmt % 9) == 0) {
9992 MulAmt2 = MulAmt / 9;
9993 } else if ((MulAmt % 5) == 0) {
9995 MulAmt2 = MulAmt / 5;
9996 } else if ((MulAmt % 3) == 0) {
9998 MulAmt2 = MulAmt / 3;
10001 (isPowerOf2_64(MulAmt2) || MulAmt2 == 3 || MulAmt2 == 5 || MulAmt2 == 9)){
10002 DebugLoc DL = N->getDebugLoc();
10004 if (isPowerOf2_64(MulAmt2) &&
10005 !(N->hasOneUse() && N->use_begin()->getOpcode() == ISD::ADD))
10006 // If second multiplifer is pow2, issue it first. We want the multiply by
10007 // 3, 5, or 9 to be folded into the addressing mode unless the lone use
10009 std::swap(MulAmt1, MulAmt2);
10012 if (isPowerOf2_64(MulAmt1))
10013 NewMul = DAG.getNode(ISD::SHL, DL, VT, N->getOperand(0),
10014 DAG.getConstant(Log2_64(MulAmt1), MVT::i8));
10016 NewMul = DAG.getNode(X86ISD::MUL_IMM, DL, VT, N->getOperand(0),
10017 DAG.getConstant(MulAmt1, VT));
10019 if (isPowerOf2_64(MulAmt2))
10020 NewMul = DAG.getNode(ISD::SHL, DL, VT, NewMul,
10021 DAG.getConstant(Log2_64(MulAmt2), MVT::i8));
10023 NewMul = DAG.getNode(X86ISD::MUL_IMM, DL, VT, NewMul,
10024 DAG.getConstant(MulAmt2, VT));
10026 // Do not add new nodes to DAG combiner worklist.
10027 DCI.CombineTo(N, NewMul, false);
10032 static SDValue PerformSHLCombine(SDNode *N, SelectionDAG &DAG) {
10033 SDValue N0 = N->getOperand(0);
10034 SDValue N1 = N->getOperand(1);
10035 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1);
10036 EVT VT = N0.getValueType();
10038 // fold (shl (and (setcc_c), c1), c2) -> (and setcc_c, (c1 << c2))
10039 // since the result of setcc_c is all zero's or all ones.
10040 if (N1C && N0.getOpcode() == ISD::AND &&
10041 N0.getOperand(1).getOpcode() == ISD::Constant) {
10042 SDValue N00 = N0.getOperand(0);
10043 if (N00.getOpcode() == X86ISD::SETCC_CARRY ||
10044 ((N00.getOpcode() == ISD::ANY_EXTEND ||
10045 N00.getOpcode() == ISD::ZERO_EXTEND) &&
10046 N00.getOperand(0).getOpcode() == X86ISD::SETCC_CARRY)) {
10047 APInt Mask = cast<ConstantSDNode>(N0.getOperand(1))->getAPIntValue();
10048 APInt ShAmt = N1C->getAPIntValue();
10049 Mask = Mask.shl(ShAmt);
10051 return DAG.getNode(ISD::AND, N->getDebugLoc(), VT,
10052 N00, DAG.getConstant(Mask, VT));
10059 /// PerformShiftCombine - Transforms vector shift nodes to use vector shifts
10061 static SDValue PerformShiftCombine(SDNode* N, SelectionDAG &DAG,
10062 const X86Subtarget *Subtarget) {
10063 EVT VT = N->getValueType(0);
10064 if (!VT.isVector() && VT.isInteger() &&
10065 N->getOpcode() == ISD::SHL)
10066 return PerformSHLCombine(N, DAG);
10068 // On X86 with SSE2 support, we can transform this to a vector shift if
10069 // all elements are shifted by the same amount. We can't do this in legalize
10070 // because the a constant vector is typically transformed to a constant pool
10071 // so we have no knowledge of the shift amount.
10072 if (!Subtarget->hasSSE2())
10075 if (VT != MVT::v2i64 && VT != MVT::v4i32 && VT != MVT::v8i16)
10078 SDValue ShAmtOp = N->getOperand(1);
10079 EVT EltVT = VT.getVectorElementType();
10080 DebugLoc DL = N->getDebugLoc();
10081 SDValue BaseShAmt = SDValue();
10082 if (ShAmtOp.getOpcode() == ISD::BUILD_VECTOR) {
10083 unsigned NumElts = VT.getVectorNumElements();
10085 for (; i != NumElts; ++i) {
10086 SDValue Arg = ShAmtOp.getOperand(i);
10087 if (Arg.getOpcode() == ISD::UNDEF) continue;
10091 for (; i != NumElts; ++i) {
10092 SDValue Arg = ShAmtOp.getOperand(i);
10093 if (Arg.getOpcode() == ISD::UNDEF) continue;
10094 if (Arg != BaseShAmt) {
10098 } else if (ShAmtOp.getOpcode() == ISD::VECTOR_SHUFFLE &&
10099 cast<ShuffleVectorSDNode>(ShAmtOp)->isSplat()) {
10100 SDValue InVec = ShAmtOp.getOperand(0);
10101 if (InVec.getOpcode() == ISD::BUILD_VECTOR) {
10102 unsigned NumElts = InVec.getValueType().getVectorNumElements();
10104 for (; i != NumElts; ++i) {
10105 SDValue Arg = InVec.getOperand(i);
10106 if (Arg.getOpcode() == ISD::UNDEF) continue;
10110 } else if (InVec.getOpcode() == ISD::INSERT_VECTOR_ELT) {
10111 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(InVec.getOperand(2))) {
10112 unsigned SplatIdx= cast<ShuffleVectorSDNode>(ShAmtOp)->getSplatIndex();
10113 if (C->getZExtValue() == SplatIdx)
10114 BaseShAmt = InVec.getOperand(1);
10117 if (BaseShAmt.getNode() == 0)
10118 BaseShAmt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, EltVT, ShAmtOp,
10119 DAG.getIntPtrConstant(0));
10123 // The shift amount is an i32.
10124 if (EltVT.bitsGT(MVT::i32))
10125 BaseShAmt = DAG.getNode(ISD::TRUNCATE, DL, MVT::i32, BaseShAmt);
10126 else if (EltVT.bitsLT(MVT::i32))
10127 BaseShAmt = DAG.getNode(ISD::ZERO_EXTEND, DL, MVT::i32, BaseShAmt);
10129 // The shift amount is identical so we can do a vector shift.
10130 SDValue ValOp = N->getOperand(0);
10131 switch (N->getOpcode()) {
10133 llvm_unreachable("Unknown shift opcode!");
10136 if (VT == MVT::v2i64)
10137 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
10138 DAG.getConstant(Intrinsic::x86_sse2_pslli_q, MVT::i32),
10140 if (VT == MVT::v4i32)
10141 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
10142 DAG.getConstant(Intrinsic::x86_sse2_pslli_d, MVT::i32),
10144 if (VT == MVT::v8i16)
10145 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
10146 DAG.getConstant(Intrinsic::x86_sse2_pslli_w, MVT::i32),
10150 if (VT == MVT::v4i32)
10151 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
10152 DAG.getConstant(Intrinsic::x86_sse2_psrai_d, MVT::i32),
10154 if (VT == MVT::v8i16)
10155 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
10156 DAG.getConstant(Intrinsic::x86_sse2_psrai_w, MVT::i32),
10160 if (VT == MVT::v2i64)
10161 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
10162 DAG.getConstant(Intrinsic::x86_sse2_psrli_q, MVT::i32),
10164 if (VT == MVT::v4i32)
10165 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
10166 DAG.getConstant(Intrinsic::x86_sse2_psrli_d, MVT::i32),
10168 if (VT == MVT::v8i16)
10169 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, VT,
10170 DAG.getConstant(Intrinsic::x86_sse2_psrli_w, MVT::i32),
10177 static SDValue PerformOrCombine(SDNode *N, SelectionDAG &DAG,
10178 TargetLowering::DAGCombinerInfo &DCI,
10179 const X86Subtarget *Subtarget) {
10180 if (DCI.isBeforeLegalizeOps())
10183 EVT VT = N->getValueType(0);
10184 if (VT != MVT::i16 && VT != MVT::i32 && VT != MVT::i64)
10187 // fold (or (x << c) | (y >> (64 - c))) ==> (shld64 x, y, c)
10188 SDValue N0 = N->getOperand(0);
10189 SDValue N1 = N->getOperand(1);
10190 if (N0.getOpcode() == ISD::SRL && N1.getOpcode() == ISD::SHL)
10192 if (N0.getOpcode() != ISD::SHL || N1.getOpcode() != ISD::SRL)
10194 if (!N0.hasOneUse() || !N1.hasOneUse())
10197 SDValue ShAmt0 = N0.getOperand(1);
10198 if (ShAmt0.getValueType() != MVT::i8)
10200 SDValue ShAmt1 = N1.getOperand(1);
10201 if (ShAmt1.getValueType() != MVT::i8)
10203 if (ShAmt0.getOpcode() == ISD::TRUNCATE)
10204 ShAmt0 = ShAmt0.getOperand(0);
10205 if (ShAmt1.getOpcode() == ISD::TRUNCATE)
10206 ShAmt1 = ShAmt1.getOperand(0);
10208 DebugLoc DL = N->getDebugLoc();
10209 unsigned Opc = X86ISD::SHLD;
10210 SDValue Op0 = N0.getOperand(0);
10211 SDValue Op1 = N1.getOperand(0);
10212 if (ShAmt0.getOpcode() == ISD::SUB) {
10213 Opc = X86ISD::SHRD;
10214 std::swap(Op0, Op1);
10215 std::swap(ShAmt0, ShAmt1);
10218 unsigned Bits = VT.getSizeInBits();
10219 if (ShAmt1.getOpcode() == ISD::SUB) {
10220 SDValue Sum = ShAmt1.getOperand(0);
10221 if (ConstantSDNode *SumC = dyn_cast<ConstantSDNode>(Sum)) {
10222 SDValue ShAmt1Op1 = ShAmt1.getOperand(1);
10223 if (ShAmt1Op1.getNode()->getOpcode() == ISD::TRUNCATE)
10224 ShAmt1Op1 = ShAmt1Op1.getOperand(0);
10225 if (SumC->getSExtValue() == Bits && ShAmt1Op1 == ShAmt0)
10226 return DAG.getNode(Opc, DL, VT,
10228 DAG.getNode(ISD::TRUNCATE, DL,
10231 } else if (ConstantSDNode *ShAmt1C = dyn_cast<ConstantSDNode>(ShAmt1)) {
10232 ConstantSDNode *ShAmt0C = dyn_cast<ConstantSDNode>(ShAmt0);
10234 ShAmt0C->getSExtValue() + ShAmt1C->getSExtValue() == Bits)
10235 return DAG.getNode(Opc, DL, VT,
10236 N0.getOperand(0), N1.getOperand(0),
10237 DAG.getNode(ISD::TRUNCATE, DL,
10244 /// PerformSTORECombine - Do target-specific dag combines on STORE nodes.
10245 static SDValue PerformSTORECombine(SDNode *N, SelectionDAG &DAG,
10246 const X86Subtarget *Subtarget) {
10247 // Turn load->store of MMX types into GPR load/stores. This avoids clobbering
10248 // the FP state in cases where an emms may be missing.
10249 // A preferable solution to the general problem is to figure out the right
10250 // places to insert EMMS. This qualifies as a quick hack.
10252 // Similarly, turn load->store of i64 into double load/stores in 32-bit mode.
10253 StoreSDNode *St = cast<StoreSDNode>(N);
10254 EVT VT = St->getValue().getValueType();
10255 if (VT.getSizeInBits() != 64)
10258 const Function *F = DAG.getMachineFunction().getFunction();
10259 bool NoImplicitFloatOps = F->hasFnAttr(Attribute::NoImplicitFloat);
10260 bool F64IsLegal = !UseSoftFloat && !NoImplicitFloatOps
10261 && Subtarget->hasSSE2();
10262 if ((VT.isVector() ||
10263 (VT == MVT::i64 && F64IsLegal && !Subtarget->is64Bit())) &&
10264 isa<LoadSDNode>(St->getValue()) &&
10265 !cast<LoadSDNode>(St->getValue())->isVolatile() &&
10266 St->getChain().hasOneUse() && !St->isVolatile()) {
10267 SDNode* LdVal = St->getValue().getNode();
10268 LoadSDNode *Ld = 0;
10269 int TokenFactorIndex = -1;
10270 SmallVector<SDValue, 8> Ops;
10271 SDNode* ChainVal = St->getChain().getNode();
10272 // Must be a store of a load. We currently handle two cases: the load
10273 // is a direct child, and it's under an intervening TokenFactor. It is
10274 // possible to dig deeper under nested TokenFactors.
10275 if (ChainVal == LdVal)
10276 Ld = cast<LoadSDNode>(St->getChain());
10277 else if (St->getValue().hasOneUse() &&
10278 ChainVal->getOpcode() == ISD::TokenFactor) {
10279 for (unsigned i=0, e = ChainVal->getNumOperands(); i != e; ++i) {
10280 if (ChainVal->getOperand(i).getNode() == LdVal) {
10281 TokenFactorIndex = i;
10282 Ld = cast<LoadSDNode>(St->getValue());
10284 Ops.push_back(ChainVal->getOperand(i));
10288 if (!Ld || !ISD::isNormalLoad(Ld))
10291 // If this is not the MMX case, i.e. we are just turning i64 load/store
10292 // into f64 load/store, avoid the transformation if there are multiple
10293 // uses of the loaded value.
10294 if (!VT.isVector() && !Ld->hasNUsesOfValue(1, 0))
10297 DebugLoc LdDL = Ld->getDebugLoc();
10298 DebugLoc StDL = N->getDebugLoc();
10299 // If we are a 64-bit capable x86, lower to a single movq load/store pair.
10300 // Otherwise, if it's legal to use f64 SSE instructions, use f64 load/store
10302 if (Subtarget->is64Bit() || F64IsLegal) {
10303 EVT LdVT = Subtarget->is64Bit() ? MVT::i64 : MVT::f64;
10304 SDValue NewLd = DAG.getLoad(LdVT, LdDL, Ld->getChain(),
10305 Ld->getBasePtr(), Ld->getSrcValue(),
10306 Ld->getSrcValueOffset(), Ld->isVolatile(),
10307 Ld->isNonTemporal(), Ld->getAlignment());
10308 SDValue NewChain = NewLd.getValue(1);
10309 if (TokenFactorIndex != -1) {
10310 Ops.push_back(NewChain);
10311 NewChain = DAG.getNode(ISD::TokenFactor, LdDL, MVT::Other, &Ops[0],
10314 return DAG.getStore(NewChain, StDL, NewLd, St->getBasePtr(),
10315 St->getSrcValue(), St->getSrcValueOffset(),
10316 St->isVolatile(), St->isNonTemporal(),
10317 St->getAlignment());
10320 // Otherwise, lower to two pairs of 32-bit loads / stores.
10321 SDValue LoAddr = Ld->getBasePtr();
10322 SDValue HiAddr = DAG.getNode(ISD::ADD, LdDL, MVT::i32, LoAddr,
10323 DAG.getConstant(4, MVT::i32));
10325 SDValue LoLd = DAG.getLoad(MVT::i32, LdDL, Ld->getChain(), LoAddr,
10326 Ld->getSrcValue(), Ld->getSrcValueOffset(),
10327 Ld->isVolatile(), Ld->isNonTemporal(),
10328 Ld->getAlignment());
10329 SDValue HiLd = DAG.getLoad(MVT::i32, LdDL, Ld->getChain(), HiAddr,
10330 Ld->getSrcValue(), Ld->getSrcValueOffset()+4,
10331 Ld->isVolatile(), Ld->isNonTemporal(),
10332 MinAlign(Ld->getAlignment(), 4));
10334 SDValue NewChain = LoLd.getValue(1);
10335 if (TokenFactorIndex != -1) {
10336 Ops.push_back(LoLd);
10337 Ops.push_back(HiLd);
10338 NewChain = DAG.getNode(ISD::TokenFactor, LdDL, MVT::Other, &Ops[0],
10342 LoAddr = St->getBasePtr();
10343 HiAddr = DAG.getNode(ISD::ADD, StDL, MVT::i32, LoAddr,
10344 DAG.getConstant(4, MVT::i32));
10346 SDValue LoSt = DAG.getStore(NewChain, StDL, LoLd, LoAddr,
10347 St->getSrcValue(), St->getSrcValueOffset(),
10348 St->isVolatile(), St->isNonTemporal(),
10349 St->getAlignment());
10350 SDValue HiSt = DAG.getStore(NewChain, StDL, HiLd, HiAddr,
10352 St->getSrcValueOffset() + 4,
10354 St->isNonTemporal(),
10355 MinAlign(St->getAlignment(), 4));
10356 return DAG.getNode(ISD::TokenFactor, StDL, MVT::Other, LoSt, HiSt);
10361 /// PerformFORCombine - Do target-specific dag combines on X86ISD::FOR and
10362 /// X86ISD::FXOR nodes.
10363 static SDValue PerformFORCombine(SDNode *N, SelectionDAG &DAG) {
10364 assert(N->getOpcode() == X86ISD::FOR || N->getOpcode() == X86ISD::FXOR);
10365 // F[X]OR(0.0, x) -> x
10366 // F[X]OR(x, 0.0) -> x
10367 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(0)))
10368 if (C->getValueAPF().isPosZero())
10369 return N->getOperand(1);
10370 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(1)))
10371 if (C->getValueAPF().isPosZero())
10372 return N->getOperand(0);
10376 /// PerformFANDCombine - Do target-specific dag combines on X86ISD::FAND nodes.
10377 static SDValue PerformFANDCombine(SDNode *N, SelectionDAG &DAG) {
10378 // FAND(0.0, x) -> 0.0
10379 // FAND(x, 0.0) -> 0.0
10380 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(0)))
10381 if (C->getValueAPF().isPosZero())
10382 return N->getOperand(0);
10383 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(1)))
10384 if (C->getValueAPF().isPosZero())
10385 return N->getOperand(1);
10389 static SDValue PerformBTCombine(SDNode *N,
10391 TargetLowering::DAGCombinerInfo &DCI) {
10392 // BT ignores high bits in the bit index operand.
10393 SDValue Op1 = N->getOperand(1);
10394 if (Op1.hasOneUse()) {
10395 unsigned BitWidth = Op1.getValueSizeInBits();
10396 APInt DemandedMask = APInt::getLowBitsSet(BitWidth, Log2_32(BitWidth));
10397 APInt KnownZero, KnownOne;
10398 TargetLowering::TargetLoweringOpt TLO(DAG, !DCI.isBeforeLegalize(),
10399 !DCI.isBeforeLegalizeOps());
10400 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
10401 if (TLO.ShrinkDemandedConstant(Op1, DemandedMask) ||
10402 TLI.SimplifyDemandedBits(Op1, DemandedMask, KnownZero, KnownOne, TLO))
10403 DCI.CommitTargetLoweringOpt(TLO);
10408 static SDValue PerformVZEXT_MOVLCombine(SDNode *N, SelectionDAG &DAG) {
10409 SDValue Op = N->getOperand(0);
10410 if (Op.getOpcode() == ISD::BIT_CONVERT)
10411 Op = Op.getOperand(0);
10412 EVT VT = N->getValueType(0), OpVT = Op.getValueType();
10413 if (Op.getOpcode() == X86ISD::VZEXT_LOAD &&
10414 VT.getVectorElementType().getSizeInBits() ==
10415 OpVT.getVectorElementType().getSizeInBits()) {
10416 return DAG.getNode(ISD::BIT_CONVERT, N->getDebugLoc(), VT, Op);
10421 static SDValue PerformZExtCombine(SDNode *N, SelectionDAG &DAG) {
10422 // (i32 zext (and (i8 x86isd::setcc_carry), 1)) ->
10423 // (and (i32 x86isd::setcc_carry), 1)
10424 // This eliminates the zext. This transformation is necessary because
10425 // ISD::SETCC is always legalized to i8.
10426 DebugLoc dl = N->getDebugLoc();
10427 SDValue N0 = N->getOperand(0);
10428 EVT VT = N->getValueType(0);
10429 if (N0.getOpcode() == ISD::AND &&
10431 N0.getOperand(0).hasOneUse()) {
10432 SDValue N00 = N0.getOperand(0);
10433 if (N00.getOpcode() != X86ISD::SETCC_CARRY)
10435 ConstantSDNode *C = dyn_cast<ConstantSDNode>(N0.getOperand(1));
10436 if (!C || C->getZExtValue() != 1)
10438 return DAG.getNode(ISD::AND, dl, VT,
10439 DAG.getNode(X86ISD::SETCC_CARRY, dl, VT,
10440 N00.getOperand(0), N00.getOperand(1)),
10441 DAG.getConstant(1, VT));
10447 SDValue X86TargetLowering::PerformDAGCombine(SDNode *N,
10448 DAGCombinerInfo &DCI) const {
10449 SelectionDAG &DAG = DCI.DAG;
10450 switch (N->getOpcode()) {
10452 case ISD::VECTOR_SHUFFLE: return PerformShuffleCombine(N, DAG, *this);
10453 case ISD::EXTRACT_VECTOR_ELT:
10454 return PerformEXTRACT_VECTOR_ELTCombine(N, DAG, *this);
10455 case ISD::SELECT: return PerformSELECTCombine(N, DAG, Subtarget);
10456 case X86ISD::CMOV: return PerformCMOVCombine(N, DAG, DCI);
10457 case ISD::MUL: return PerformMulCombine(N, DAG, DCI);
10460 case ISD::SRL: return PerformShiftCombine(N, DAG, Subtarget);
10461 case ISD::OR: return PerformOrCombine(N, DAG, DCI, Subtarget);
10462 case ISD::STORE: return PerformSTORECombine(N, DAG, Subtarget);
10464 case X86ISD::FOR: return PerformFORCombine(N, DAG);
10465 case X86ISD::FAND: return PerformFANDCombine(N, DAG);
10466 case X86ISD::BT: return PerformBTCombine(N, DAG, DCI);
10467 case X86ISD::VZEXT_MOVL: return PerformVZEXT_MOVLCombine(N, DAG);
10468 case ISD::ZERO_EXTEND: return PerformZExtCombine(N, DAG);
10474 /// isTypeDesirableForOp - Return true if the target has native support for
10475 /// the specified value type and it is 'desirable' to use the type for the
10476 /// given node type. e.g. On x86 i16 is legal, but undesirable since i16
10477 /// instruction encodings are longer and some i16 instructions are slow.
10478 bool X86TargetLowering::isTypeDesirableForOp(unsigned Opc, EVT VT) const {
10479 if (!isTypeLegal(VT))
10481 if (VT != MVT::i16)
10488 case ISD::SIGN_EXTEND:
10489 case ISD::ZERO_EXTEND:
10490 case ISD::ANY_EXTEND:
10503 static bool MayFoldLoad(SDValue Op) {
10504 return Op.hasOneUse() && ISD::isNormalLoad(Op.getNode());
10507 static bool MayFoldIntoStore(SDValue Op) {
10508 return Op.hasOneUse() && ISD::isNormalStore(*Op.getNode()->use_begin());
10511 /// IsDesirableToPromoteOp - This method query the target whether it is
10512 /// beneficial for dag combiner to promote the specified node. If true, it
10513 /// should return the desired promotion type by reference.
10514 bool X86TargetLowering::IsDesirableToPromoteOp(SDValue Op, EVT &PVT) const {
10515 EVT VT = Op.getValueType();
10516 if (VT != MVT::i16)
10519 bool Promote = false;
10520 bool Commute = false;
10521 switch (Op.getOpcode()) {
10524 LoadSDNode *LD = cast<LoadSDNode>(Op);
10525 // If the non-extending load has a single use and it's not live out, then it
10526 // might be folded.
10527 if (LD->getExtensionType() == ISD::NON_EXTLOAD /*&&
10528 Op.hasOneUse()*/) {
10529 for (SDNode::use_iterator UI = Op.getNode()->use_begin(),
10530 UE = Op.getNode()->use_end(); UI != UE; ++UI) {
10531 // The only case where we'd want to promote LOAD (rather then it being
10532 // promoted as an operand is when it's only use is liveout.
10533 if (UI->getOpcode() != ISD::CopyToReg)
10540 case ISD::SIGN_EXTEND:
10541 case ISD::ZERO_EXTEND:
10542 case ISD::ANY_EXTEND:
10547 SDValue N0 = Op.getOperand(0);
10548 // Look out for (store (shl (load), x)).
10549 if (MayFoldLoad(N0) && MayFoldIntoStore(Op))
10562 SDValue N0 = Op.getOperand(0);
10563 SDValue N1 = Op.getOperand(1);
10564 if (!Commute && MayFoldLoad(N1))
10566 // Avoid disabling potential load folding opportunities.
10567 if (MayFoldLoad(N0) && (!isa<ConstantSDNode>(N1) || MayFoldIntoStore(Op)))
10569 if (MayFoldLoad(N1) && (!isa<ConstantSDNode>(N0) || MayFoldIntoStore(Op)))
10579 //===----------------------------------------------------------------------===//
10580 // X86 Inline Assembly Support
10581 //===----------------------------------------------------------------------===//
10583 static bool LowerToBSwap(CallInst *CI) {
10584 // FIXME: this should verify that we are targetting a 486 or better. If not,
10585 // we will turn this bswap into something that will be lowered to logical ops
10586 // instead of emitting the bswap asm. For now, we don't support 486 or lower
10587 // so don't worry about this.
10589 // Verify this is a simple bswap.
10590 if (CI->getNumArgOperands() != 1 ||
10591 CI->getType() != CI->getArgOperand(0)->getType() ||
10592 !CI->getType()->isIntegerTy())
10595 const IntegerType *Ty = dyn_cast<IntegerType>(CI->getType());
10596 if (!Ty || Ty->getBitWidth() % 16 != 0)
10599 // Okay, we can do this xform, do so now.
10600 const Type *Tys[] = { Ty };
10601 Module *M = CI->getParent()->getParent()->getParent();
10602 Constant *Int = Intrinsic::getDeclaration(M, Intrinsic::bswap, Tys, 1);
10604 Value *Op = CI->getArgOperand(0);
10605 Op = CallInst::Create(Int, Op, CI->getName(), CI);
10607 CI->replaceAllUsesWith(Op);
10608 CI->eraseFromParent();
10612 bool X86TargetLowering::ExpandInlineAsm(CallInst *CI) const {
10613 InlineAsm *IA = cast<InlineAsm>(CI->getCalledValue());
10614 std::vector<InlineAsm::ConstraintInfo> Constraints = IA->ParseConstraints();
10616 std::string AsmStr = IA->getAsmString();
10618 // TODO: should remove alternatives from the asmstring: "foo {a|b}" -> "foo a"
10619 SmallVector<StringRef, 4> AsmPieces;
10620 SplitString(AsmStr, AsmPieces, "\n"); // ; as separator?
10622 switch (AsmPieces.size()) {
10623 default: return false;
10625 AsmStr = AsmPieces[0];
10627 SplitString(AsmStr, AsmPieces, " \t"); // Split with whitespace.
10630 if (AsmPieces.size() == 2 &&
10631 (AsmPieces[0] == "bswap" ||
10632 AsmPieces[0] == "bswapq" ||
10633 AsmPieces[0] == "bswapl") &&
10634 (AsmPieces[1] == "$0" ||
10635 AsmPieces[1] == "${0:q}")) {
10636 // No need to check constraints, nothing other than the equivalent of
10637 // "=r,0" would be valid here.
10638 return LowerToBSwap(CI);
10640 // rorw $$8, ${0:w} --> llvm.bswap.i16
10641 if (CI->getType()->isIntegerTy(16) &&
10642 AsmPieces.size() == 3 &&
10643 (AsmPieces[0] == "rorw" || AsmPieces[0] == "rolw") &&
10644 AsmPieces[1] == "$$8," &&
10645 AsmPieces[2] == "${0:w}" &&
10646 IA->getConstraintString().compare(0, 5, "=r,0,") == 0) {
10648 const std::string &Constraints = IA->getConstraintString();
10649 SplitString(StringRef(Constraints).substr(5), AsmPieces, ",");
10650 std::sort(AsmPieces.begin(), AsmPieces.end());
10651 if (AsmPieces.size() == 4 &&
10652 AsmPieces[0] == "~{cc}" &&
10653 AsmPieces[1] == "~{dirflag}" &&
10654 AsmPieces[2] == "~{flags}" &&
10655 AsmPieces[3] == "~{fpsr}") {
10656 return LowerToBSwap(CI);
10661 if (CI->getType()->isIntegerTy(64) &&
10662 Constraints.size() >= 2 &&
10663 Constraints[0].Codes.size() == 1 && Constraints[0].Codes[0] == "A" &&
10664 Constraints[1].Codes.size() == 1 && Constraints[1].Codes[0] == "0") {
10665 // bswap %eax / bswap %edx / xchgl %eax, %edx -> llvm.bswap.i64
10666 SmallVector<StringRef, 4> Words;
10667 SplitString(AsmPieces[0], Words, " \t");
10668 if (Words.size() == 2 && Words[0] == "bswap" && Words[1] == "%eax") {
10670 SplitString(AsmPieces[1], Words, " \t");
10671 if (Words.size() == 2 && Words[0] == "bswap" && Words[1] == "%edx") {
10673 SplitString(AsmPieces[2], Words, " \t,");
10674 if (Words.size() == 3 && Words[0] == "xchgl" && Words[1] == "%eax" &&
10675 Words[2] == "%edx") {
10676 return LowerToBSwap(CI);
10688 /// getConstraintType - Given a constraint letter, return the type of
10689 /// constraint it is for this target.
10690 X86TargetLowering::ConstraintType
10691 X86TargetLowering::getConstraintType(const std::string &Constraint) const {
10692 if (Constraint.size() == 1) {
10693 switch (Constraint[0]) {
10705 return C_RegisterClass;
10713 return TargetLowering::getConstraintType(Constraint);
10716 /// LowerXConstraint - try to replace an X constraint, which matches anything,
10717 /// with another that has more specific requirements based on the type of the
10718 /// corresponding operand.
10719 const char *X86TargetLowering::
10720 LowerXConstraint(EVT ConstraintVT) const {
10721 // FP X constraints get lowered to SSE1/2 registers if available, otherwise
10722 // 'f' like normal targets.
10723 if (ConstraintVT.isFloatingPoint()) {
10724 if (Subtarget->hasSSE2())
10726 if (Subtarget->hasSSE1())
10730 return TargetLowering::LowerXConstraint(ConstraintVT);
10733 /// LowerAsmOperandForConstraint - Lower the specified operand into the Ops
10734 /// vector. If it is invalid, don't add anything to Ops.
10735 void X86TargetLowering::LowerAsmOperandForConstraint(SDValue Op,
10737 std::vector<SDValue>&Ops,
10738 SelectionDAG &DAG) const {
10739 SDValue Result(0, 0);
10741 switch (Constraint) {
10744 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
10745 if (C->getZExtValue() <= 31) {
10746 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
10752 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
10753 if (C->getZExtValue() <= 63) {
10754 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
10760 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
10761 if ((int8_t)C->getSExtValue() == C->getSExtValue()) {
10762 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
10768 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
10769 if (C->getZExtValue() <= 255) {
10770 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
10776 // 32-bit signed value
10777 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
10778 if (ConstantInt::isValueValidForType(Type::getInt32Ty(*DAG.getContext()),
10779 C->getSExtValue())) {
10780 // Widen to 64 bits here to get it sign extended.
10781 Result = DAG.getTargetConstant(C->getSExtValue(), MVT::i64);
10784 // FIXME gcc accepts some relocatable values here too, but only in certain
10785 // memory models; it's complicated.
10790 // 32-bit unsigned value
10791 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
10792 if (ConstantInt::isValueValidForType(Type::getInt32Ty(*DAG.getContext()),
10793 C->getZExtValue())) {
10794 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
10798 // FIXME gcc accepts some relocatable values here too, but only in certain
10799 // memory models; it's complicated.
10803 // Literal immediates are always ok.
10804 if (ConstantSDNode *CST = dyn_cast<ConstantSDNode>(Op)) {
10805 // Widen to 64 bits here to get it sign extended.
10806 Result = DAG.getTargetConstant(CST->getSExtValue(), MVT::i64);
10810 // In any sort of PIC mode addresses need to be computed at runtime by
10811 // adding in a register or some sort of table lookup. These can't
10812 // be used as immediates.
10813 if (Subtarget->isPICStyleGOT() || Subtarget->isPICStyleStubPIC())
10816 // If we are in non-pic codegen mode, we allow the address of a global (with
10817 // an optional displacement) to be used with 'i'.
10818 GlobalAddressSDNode *GA = 0;
10819 int64_t Offset = 0;
10821 // Match either (GA), (GA+C), (GA+C1+C2), etc.
10823 if ((GA = dyn_cast<GlobalAddressSDNode>(Op))) {
10824 Offset += GA->getOffset();
10826 } else if (Op.getOpcode() == ISD::ADD) {
10827 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op.getOperand(1))) {
10828 Offset += C->getZExtValue();
10829 Op = Op.getOperand(0);
10832 } else if (Op.getOpcode() == ISD::SUB) {
10833 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op.getOperand(1))) {
10834 Offset += -C->getZExtValue();
10835 Op = Op.getOperand(0);
10840 // Otherwise, this isn't something we can handle, reject it.
10844 const GlobalValue *GV = GA->getGlobal();
10845 // If we require an extra load to get this address, as in PIC mode, we
10846 // can't accept it.
10847 if (isGlobalStubReference(Subtarget->ClassifyGlobalReference(GV,
10848 getTargetMachine())))
10851 Result = DAG.getTargetGlobalAddress(GV, Op.getDebugLoc(),
10852 GA->getValueType(0), Offset);
10857 if (Result.getNode()) {
10858 Ops.push_back(Result);
10861 return TargetLowering::LowerAsmOperandForConstraint(Op, Constraint, Ops, DAG);
10864 std::vector<unsigned> X86TargetLowering::
10865 getRegClassForInlineAsmConstraint(const std::string &Constraint,
10867 if (Constraint.size() == 1) {
10868 // FIXME: not handling fp-stack yet!
10869 switch (Constraint[0]) { // GCC X86 Constraint Letters
10870 default: break; // Unknown constraint letter
10871 case 'q': // GENERAL_REGS in 64-bit mode, Q_REGS in 32-bit mode.
10872 if (Subtarget->is64Bit()) {
10873 if (VT == MVT::i32)
10874 return make_vector<unsigned>(X86::EAX, X86::EDX, X86::ECX, X86::EBX,
10875 X86::ESI, X86::EDI, X86::R8D, X86::R9D,
10876 X86::R10D,X86::R11D,X86::R12D,
10877 X86::R13D,X86::R14D,X86::R15D,
10878 X86::EBP, X86::ESP, 0);
10879 else if (VT == MVT::i16)
10880 return make_vector<unsigned>(X86::AX, X86::DX, X86::CX, X86::BX,
10881 X86::SI, X86::DI, X86::R8W,X86::R9W,
10882 X86::R10W,X86::R11W,X86::R12W,
10883 X86::R13W,X86::R14W,X86::R15W,
10884 X86::BP, X86::SP, 0);
10885 else if (VT == MVT::i8)
10886 return make_vector<unsigned>(X86::AL, X86::DL, X86::CL, X86::BL,
10887 X86::SIL, X86::DIL, X86::R8B,X86::R9B,
10888 X86::R10B,X86::R11B,X86::R12B,
10889 X86::R13B,X86::R14B,X86::R15B,
10890 X86::BPL, X86::SPL, 0);
10892 else if (VT == MVT::i64)
10893 return make_vector<unsigned>(X86::RAX, X86::RDX, X86::RCX, X86::RBX,
10894 X86::RSI, X86::RDI, X86::R8, X86::R9,
10895 X86::R10, X86::R11, X86::R12,
10896 X86::R13, X86::R14, X86::R15,
10897 X86::RBP, X86::RSP, 0);
10901 // 32-bit fallthrough
10902 case 'Q': // Q_REGS
10903 if (VT == MVT::i32)
10904 return make_vector<unsigned>(X86::EAX, X86::EDX, X86::ECX, X86::EBX, 0);
10905 else if (VT == MVT::i16)
10906 return make_vector<unsigned>(X86::AX, X86::DX, X86::CX, X86::BX, 0);
10907 else if (VT == MVT::i8)
10908 return make_vector<unsigned>(X86::AL, X86::DL, X86::CL, X86::BL, 0);
10909 else if (VT == MVT::i64)
10910 return make_vector<unsigned>(X86::RAX, X86::RDX, X86::RCX, X86::RBX, 0);
10915 return std::vector<unsigned>();
10918 std::pair<unsigned, const TargetRegisterClass*>
10919 X86TargetLowering::getRegForInlineAsmConstraint(const std::string &Constraint,
10921 // First, see if this is a constraint that directly corresponds to an LLVM
10923 if (Constraint.size() == 1) {
10924 // GCC Constraint Letters
10925 switch (Constraint[0]) {
10927 case 'r': // GENERAL_REGS
10928 case 'l': // INDEX_REGS
10930 return std::make_pair(0U, X86::GR8RegisterClass);
10931 if (VT == MVT::i16)
10932 return std::make_pair(0U, X86::GR16RegisterClass);
10933 if (VT == MVT::i32 || !Subtarget->is64Bit())
10934 return std::make_pair(0U, X86::GR32RegisterClass);
10935 return std::make_pair(0U, X86::GR64RegisterClass);
10936 case 'R': // LEGACY_REGS
10938 return std::make_pair(0U, X86::GR8_NOREXRegisterClass);
10939 if (VT == MVT::i16)
10940 return std::make_pair(0U, X86::GR16_NOREXRegisterClass);
10941 if (VT == MVT::i32 || !Subtarget->is64Bit())
10942 return std::make_pair(0U, X86::GR32_NOREXRegisterClass);
10943 return std::make_pair(0U, X86::GR64_NOREXRegisterClass);
10944 case 'f': // FP Stack registers.
10945 // If SSE is enabled for this VT, use f80 to ensure the isel moves the
10946 // value to the correct fpstack register class.
10947 if (VT == MVT::f32 && !isScalarFPTypeInSSEReg(VT))
10948 return std::make_pair(0U, X86::RFP32RegisterClass);
10949 if (VT == MVT::f64 && !isScalarFPTypeInSSEReg(VT))
10950 return std::make_pair(0U, X86::RFP64RegisterClass);
10951 return std::make_pair(0U, X86::RFP80RegisterClass);
10952 case 'y': // MMX_REGS if MMX allowed.
10953 if (!Subtarget->hasMMX()) break;
10954 return std::make_pair(0U, X86::VR64RegisterClass);
10955 case 'Y': // SSE_REGS if SSE2 allowed
10956 if (!Subtarget->hasSSE2()) break;
10958 case 'x': // SSE_REGS if SSE1 allowed
10959 if (!Subtarget->hasSSE1()) break;
10961 switch (VT.getSimpleVT().SimpleTy) {
10963 // Scalar SSE types.
10966 return std::make_pair(0U, X86::FR32RegisterClass);
10969 return std::make_pair(0U, X86::FR64RegisterClass);
10977 return std::make_pair(0U, X86::VR128RegisterClass);
10983 // Use the default implementation in TargetLowering to convert the register
10984 // constraint into a member of a register class.
10985 std::pair<unsigned, const TargetRegisterClass*> Res;
10986 Res = TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
10988 // Not found as a standard register?
10989 if (Res.second == 0) {
10990 // Map st(0) -> st(7) -> ST0
10991 if (Constraint.size() == 7 && Constraint[0] == '{' &&
10992 tolower(Constraint[1]) == 's' &&
10993 tolower(Constraint[2]) == 't' &&
10994 Constraint[3] == '(' &&
10995 (Constraint[4] >= '0' && Constraint[4] <= '7') &&
10996 Constraint[5] == ')' &&
10997 Constraint[6] == '}') {
10999 Res.first = X86::ST0+Constraint[4]-'0';
11000 Res.second = X86::RFP80RegisterClass;
11004 // GCC allows "st(0)" to be called just plain "st".
11005 if (StringRef("{st}").equals_lower(Constraint)) {
11006 Res.first = X86::ST0;
11007 Res.second = X86::RFP80RegisterClass;
11012 if (StringRef("{flags}").equals_lower(Constraint)) {
11013 Res.first = X86::EFLAGS;
11014 Res.second = X86::CCRRegisterClass;
11018 // 'A' means EAX + EDX.
11019 if (Constraint == "A") {
11020 Res.first = X86::EAX;
11021 Res.second = X86::GR32_ADRegisterClass;
11027 // Otherwise, check to see if this is a register class of the wrong value
11028 // type. For example, we want to map "{ax},i32" -> {eax}, we don't want it to
11029 // turn into {ax},{dx}.
11030 if (Res.second->hasType(VT))
11031 return Res; // Correct type already, nothing to do.
11033 // All of the single-register GCC register classes map their values onto
11034 // 16-bit register pieces "ax","dx","cx","bx","si","di","bp","sp". If we
11035 // really want an 8-bit or 32-bit register, map to the appropriate register
11036 // class and return the appropriate register.
11037 if (Res.second == X86::GR16RegisterClass) {
11038 if (VT == MVT::i8) {
11039 unsigned DestReg = 0;
11040 switch (Res.first) {
11042 case X86::AX: DestReg = X86::AL; break;
11043 case X86::DX: DestReg = X86::DL; break;
11044 case X86::CX: DestReg = X86::CL; break;
11045 case X86::BX: DestReg = X86::BL; break;
11048 Res.first = DestReg;
11049 Res.second = X86::GR8RegisterClass;
11051 } else if (VT == MVT::i32) {
11052 unsigned DestReg = 0;
11053 switch (Res.first) {
11055 case X86::AX: DestReg = X86::EAX; break;
11056 case X86::DX: DestReg = X86::EDX; break;
11057 case X86::CX: DestReg = X86::ECX; break;
11058 case X86::BX: DestReg = X86::EBX; break;
11059 case X86::SI: DestReg = X86::ESI; break;
11060 case X86::DI: DestReg = X86::EDI; break;
11061 case X86::BP: DestReg = X86::EBP; break;
11062 case X86::SP: DestReg = X86::ESP; break;
11065 Res.first = DestReg;
11066 Res.second = X86::GR32RegisterClass;
11068 } else if (VT == MVT::i64) {
11069 unsigned DestReg = 0;
11070 switch (Res.first) {
11072 case X86::AX: DestReg = X86::RAX; break;
11073 case X86::DX: DestReg = X86::RDX; break;
11074 case X86::CX: DestReg = X86::RCX; break;
11075 case X86::BX: DestReg = X86::RBX; break;
11076 case X86::SI: DestReg = X86::RSI; break;
11077 case X86::DI: DestReg = X86::RDI; break;
11078 case X86::BP: DestReg = X86::RBP; break;
11079 case X86::SP: DestReg = X86::RSP; break;
11082 Res.first = DestReg;
11083 Res.second = X86::GR64RegisterClass;
11086 } else if (Res.second == X86::FR32RegisterClass ||
11087 Res.second == X86::FR64RegisterClass ||
11088 Res.second == X86::VR128RegisterClass) {
11089 // Handle references to XMM physical registers that got mapped into the
11090 // wrong class. This can happen with constraints like {xmm0} where the
11091 // target independent register mapper will just pick the first match it can
11092 // find, ignoring the required type.
11093 if (VT == MVT::f32)
11094 Res.second = X86::FR32RegisterClass;
11095 else if (VT == MVT::f64)
11096 Res.second = X86::FR64RegisterClass;
11097 else if (X86::VR128RegisterClass->hasType(VT))
11098 Res.second = X86::VR128RegisterClass;