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 //===----------------------------------------------------------------------===//
16 #include "X86InstrBuilder.h"
17 #include "X86ISelLowering.h"
18 #include "X86MachineFunctionInfo.h"
19 #include "X86TargetMachine.h"
20 #include "llvm/CallingConv.h"
21 #include "llvm/Constants.h"
22 #include "llvm/DerivedTypes.h"
23 #include "llvm/GlobalVariable.h"
24 #include "llvm/Function.h"
25 #include "llvm/Intrinsics.h"
26 #include "llvm/ADT/BitVector.h"
27 #include "llvm/ADT/VectorExtras.h"
28 #include "llvm/CodeGen/CallingConvLower.h"
29 #include "llvm/CodeGen/MachineFrameInfo.h"
30 #include "llvm/CodeGen/MachineFunction.h"
31 #include "llvm/CodeGen/MachineInstrBuilder.h"
32 #include "llvm/CodeGen/MachineModuleInfo.h"
33 #include "llvm/CodeGen/MachineRegisterInfo.h"
34 #include "llvm/CodeGen/PseudoSourceValue.h"
35 #include "llvm/CodeGen/SelectionDAG.h"
36 #include "llvm/Support/MathExtras.h"
37 #include "llvm/Support/Debug.h"
38 #include "llvm/Target/TargetOptions.h"
39 #include "llvm/ADT/SmallSet.h"
40 #include "llvm/ADT/StringExtras.h"
41 #include "llvm/Support/CommandLine.h"
45 DisableMMX("disable-mmx", cl::Hidden, cl::desc("Disable use of MMX"));
47 // Forward declarations.
48 static SDValue getMOVLMask(unsigned NumElems, SelectionDAG &DAG, DebugLoc dl);
50 X86TargetLowering::X86TargetLowering(X86TargetMachine &TM)
51 : TargetLowering(TM) {
52 Subtarget = &TM.getSubtarget<X86Subtarget>();
53 X86ScalarSSEf64 = Subtarget->hasSSE2();
54 X86ScalarSSEf32 = Subtarget->hasSSE1();
55 X86StackPtr = Subtarget->is64Bit() ? X86::RSP : X86::ESP;
59 RegInfo = TM.getRegisterInfo();
62 // Set up the TargetLowering object.
64 // X86 is weird, it always uses i8 for shift amounts and setcc results.
65 setShiftAmountType(MVT::i8);
66 setBooleanContents(ZeroOrOneBooleanContent);
67 setSchedulingPreference(SchedulingForRegPressure);
68 setShiftAmountFlavor(Mask); // shl X, 32 == shl X, 0
69 setStackPointerRegisterToSaveRestore(X86StackPtr);
71 if (Subtarget->isTargetDarwin()) {
72 // Darwin should use _setjmp/_longjmp instead of setjmp/longjmp.
73 setUseUnderscoreSetJmp(false);
74 setUseUnderscoreLongJmp(false);
75 } else if (Subtarget->isTargetMingw()) {
76 // MS runtime is weird: it exports _setjmp, but longjmp!
77 setUseUnderscoreSetJmp(true);
78 setUseUnderscoreLongJmp(false);
80 setUseUnderscoreSetJmp(true);
81 setUseUnderscoreLongJmp(true);
84 // Set up the register classes.
85 addRegisterClass(MVT::i8, X86::GR8RegisterClass);
86 addRegisterClass(MVT::i16, X86::GR16RegisterClass);
87 addRegisterClass(MVT::i32, X86::GR32RegisterClass);
88 if (Subtarget->is64Bit())
89 addRegisterClass(MVT::i64, X86::GR64RegisterClass);
91 setLoadExtAction(ISD::SEXTLOAD, MVT::i1, Promote);
93 // We don't accept any truncstore of integer registers.
94 setTruncStoreAction(MVT::i64, MVT::i32, Expand);
95 setTruncStoreAction(MVT::i64, MVT::i16, Expand);
96 setTruncStoreAction(MVT::i64, MVT::i8 , Expand);
97 setTruncStoreAction(MVT::i32, MVT::i16, Expand);
98 setTruncStoreAction(MVT::i32, MVT::i8 , Expand);
99 setTruncStoreAction(MVT::i16, MVT::i8, Expand);
101 // SETOEQ and SETUNE require checking two conditions.
102 setCondCodeAction(ISD::SETOEQ, MVT::f32, Expand);
103 setCondCodeAction(ISD::SETOEQ, MVT::f64, Expand);
104 setCondCodeAction(ISD::SETOEQ, MVT::f80, Expand);
105 setCondCodeAction(ISD::SETUNE, MVT::f32, Expand);
106 setCondCodeAction(ISD::SETUNE, MVT::f64, Expand);
107 setCondCodeAction(ISD::SETUNE, MVT::f80, Expand);
109 // Promote all UINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have this
111 setOperationAction(ISD::UINT_TO_FP , MVT::i1 , Promote);
112 setOperationAction(ISD::UINT_TO_FP , MVT::i8 , Promote);
113 setOperationAction(ISD::UINT_TO_FP , MVT::i16 , Promote);
115 if (Subtarget->is64Bit()) {
116 setOperationAction(ISD::UINT_TO_FP , MVT::i64 , Expand);
117 setOperationAction(ISD::UINT_TO_FP , MVT::i32 , Promote);
119 if (X86ScalarSSEf64) {
120 // We have an impenetrably clever algorithm for ui64->double only.
121 setOperationAction(ISD::UINT_TO_FP , MVT::i64 , Custom);
123 // We have faster algorithm for ui32->single only.
124 setOperationAction(ISD::UINT_TO_FP , MVT::i32 , Custom);
126 setOperationAction(ISD::UINT_TO_FP , MVT::i32 , Promote);
129 // Promote i1/i8 SINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have
131 setOperationAction(ISD::SINT_TO_FP , MVT::i1 , Promote);
132 setOperationAction(ISD::SINT_TO_FP , MVT::i8 , Promote);
133 // SSE has no i16 to fp conversion, only i32
134 if (X86ScalarSSEf32) {
135 setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Promote);
136 // f32 and f64 cases are Legal, f80 case is not
137 setOperationAction(ISD::SINT_TO_FP , MVT::i32 , Custom);
139 setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Custom);
140 setOperationAction(ISD::SINT_TO_FP , MVT::i32 , Custom);
143 // In 32-bit mode these are custom lowered. In 64-bit mode F32 and F64
144 // are Legal, f80 is custom lowered.
145 setOperationAction(ISD::FP_TO_SINT , MVT::i64 , Custom);
146 setOperationAction(ISD::SINT_TO_FP , MVT::i64 , Custom);
148 // Promote i1/i8 FP_TO_SINT to larger FP_TO_SINTS's, as X86 doesn't have
150 setOperationAction(ISD::FP_TO_SINT , MVT::i1 , Promote);
151 setOperationAction(ISD::FP_TO_SINT , MVT::i8 , Promote);
153 if (X86ScalarSSEf32) {
154 setOperationAction(ISD::FP_TO_SINT , MVT::i16 , Promote);
155 // f32 and f64 cases are Legal, f80 case is not
156 setOperationAction(ISD::FP_TO_SINT , MVT::i32 , Custom);
158 setOperationAction(ISD::FP_TO_SINT , MVT::i16 , Custom);
159 setOperationAction(ISD::FP_TO_SINT , MVT::i32 , Custom);
162 // Handle FP_TO_UINT by promoting the destination to a larger signed
164 setOperationAction(ISD::FP_TO_UINT , MVT::i1 , Promote);
165 setOperationAction(ISD::FP_TO_UINT , MVT::i8 , Promote);
166 setOperationAction(ISD::FP_TO_UINT , MVT::i16 , Promote);
168 if (Subtarget->is64Bit()) {
169 setOperationAction(ISD::FP_TO_UINT , MVT::i64 , Expand);
170 setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Promote);
172 if (X86ScalarSSEf32 && !Subtarget->hasSSE3())
173 // Expand FP_TO_UINT into a select.
174 // FIXME: We would like to use a Custom expander here eventually to do
175 // the optimal thing for SSE vs. the default expansion in the legalizer.
176 setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Expand);
178 // With SSE3 we can use fisttpll to convert to a signed i64.
179 setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Promote);
182 // TODO: when we have SSE, these could be more efficient, by using movd/movq.
183 if (!X86ScalarSSEf64) {
184 setOperationAction(ISD::BIT_CONVERT , MVT::f32 , Expand);
185 setOperationAction(ISD::BIT_CONVERT , MVT::i32 , Expand);
188 // Scalar integer divide and remainder are lowered to use operations that
189 // produce two results, to match the available instructions. This exposes
190 // the two-result form to trivial CSE, which is able to combine x/y and x%y
191 // into a single instruction.
193 // Scalar integer multiply-high is also lowered to use two-result
194 // operations, to match the available instructions. However, plain multiply
195 // (low) operations are left as Legal, as there are single-result
196 // instructions for this in x86. Using the two-result multiply instructions
197 // when both high and low results are needed must be arranged by dagcombine.
198 setOperationAction(ISD::MULHS , MVT::i8 , Expand);
199 setOperationAction(ISD::MULHU , MVT::i8 , Expand);
200 setOperationAction(ISD::SDIV , MVT::i8 , Expand);
201 setOperationAction(ISD::UDIV , MVT::i8 , Expand);
202 setOperationAction(ISD::SREM , MVT::i8 , Expand);
203 setOperationAction(ISD::UREM , MVT::i8 , Expand);
204 setOperationAction(ISD::MULHS , MVT::i16 , Expand);
205 setOperationAction(ISD::MULHU , MVT::i16 , Expand);
206 setOperationAction(ISD::SDIV , MVT::i16 , Expand);
207 setOperationAction(ISD::UDIV , MVT::i16 , Expand);
208 setOperationAction(ISD::SREM , MVT::i16 , Expand);
209 setOperationAction(ISD::UREM , MVT::i16 , Expand);
210 setOperationAction(ISD::MULHS , MVT::i32 , Expand);
211 setOperationAction(ISD::MULHU , MVT::i32 , Expand);
212 setOperationAction(ISD::SDIV , MVT::i32 , Expand);
213 setOperationAction(ISD::UDIV , MVT::i32 , Expand);
214 setOperationAction(ISD::SREM , MVT::i32 , Expand);
215 setOperationAction(ISD::UREM , MVT::i32 , Expand);
216 setOperationAction(ISD::MULHS , MVT::i64 , Expand);
217 setOperationAction(ISD::MULHU , MVT::i64 , Expand);
218 setOperationAction(ISD::SDIV , MVT::i64 , Expand);
219 setOperationAction(ISD::UDIV , MVT::i64 , Expand);
220 setOperationAction(ISD::SREM , MVT::i64 , Expand);
221 setOperationAction(ISD::UREM , MVT::i64 , Expand);
223 setOperationAction(ISD::BR_JT , MVT::Other, Expand);
224 setOperationAction(ISD::BRCOND , MVT::Other, Custom);
225 setOperationAction(ISD::BR_CC , MVT::Other, Expand);
226 setOperationAction(ISD::SELECT_CC , MVT::Other, Expand);
227 if (Subtarget->is64Bit())
228 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i32, Legal);
229 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16 , Legal);
230 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8 , Legal);
231 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1 , Expand);
232 setOperationAction(ISD::FP_ROUND_INREG , MVT::f32 , Expand);
233 setOperationAction(ISD::FREM , MVT::f32 , Expand);
234 setOperationAction(ISD::FREM , MVT::f64 , Expand);
235 setOperationAction(ISD::FREM , MVT::f80 , Expand);
236 setOperationAction(ISD::FLT_ROUNDS_ , MVT::i32 , Custom);
238 setOperationAction(ISD::CTPOP , MVT::i8 , Expand);
239 setOperationAction(ISD::CTTZ , MVT::i8 , Custom);
240 setOperationAction(ISD::CTLZ , MVT::i8 , Custom);
241 setOperationAction(ISD::CTPOP , MVT::i16 , Expand);
242 setOperationAction(ISD::CTTZ , MVT::i16 , Custom);
243 setOperationAction(ISD::CTLZ , MVT::i16 , Custom);
244 setOperationAction(ISD::CTPOP , MVT::i32 , Expand);
245 setOperationAction(ISD::CTTZ , MVT::i32 , Custom);
246 setOperationAction(ISD::CTLZ , MVT::i32 , Custom);
247 if (Subtarget->is64Bit()) {
248 setOperationAction(ISD::CTPOP , MVT::i64 , Expand);
249 setOperationAction(ISD::CTTZ , MVT::i64 , Custom);
250 setOperationAction(ISD::CTLZ , MVT::i64 , Custom);
253 setOperationAction(ISD::READCYCLECOUNTER , MVT::i64 , Custom);
254 setOperationAction(ISD::BSWAP , MVT::i16 , Expand);
256 // These should be promoted to a larger select which is supported.
257 setOperationAction(ISD::SELECT , MVT::i1 , Promote);
258 setOperationAction(ISD::SELECT , MVT::i8 , Promote);
259 // X86 wants to expand cmov itself.
260 setOperationAction(ISD::SELECT , MVT::i16 , Custom);
261 setOperationAction(ISD::SELECT , MVT::i32 , Custom);
262 setOperationAction(ISD::SELECT , MVT::f32 , Custom);
263 setOperationAction(ISD::SELECT , MVT::f64 , Custom);
264 setOperationAction(ISD::SELECT , MVT::f80 , Custom);
265 setOperationAction(ISD::SETCC , MVT::i8 , Custom);
266 setOperationAction(ISD::SETCC , MVT::i16 , Custom);
267 setOperationAction(ISD::SETCC , MVT::i32 , Custom);
268 setOperationAction(ISD::SETCC , MVT::f32 , Custom);
269 setOperationAction(ISD::SETCC , MVT::f64 , Custom);
270 setOperationAction(ISD::SETCC , MVT::f80 , Custom);
271 if (Subtarget->is64Bit()) {
272 setOperationAction(ISD::SELECT , MVT::i64 , Custom);
273 setOperationAction(ISD::SETCC , MVT::i64 , Custom);
275 // X86 ret instruction may pop stack.
276 setOperationAction(ISD::RET , MVT::Other, Custom);
277 setOperationAction(ISD::EH_RETURN , MVT::Other, Custom);
280 setOperationAction(ISD::ConstantPool , MVT::i32 , Custom);
281 setOperationAction(ISD::JumpTable , MVT::i32 , Custom);
282 setOperationAction(ISD::GlobalAddress , MVT::i32 , Custom);
283 setOperationAction(ISD::GlobalTLSAddress, MVT::i32 , Custom);
284 if (Subtarget->is64Bit())
285 setOperationAction(ISD::GlobalTLSAddress, MVT::i64, Custom);
286 setOperationAction(ISD::ExternalSymbol , MVT::i32 , Custom);
287 if (Subtarget->is64Bit()) {
288 setOperationAction(ISD::ConstantPool , MVT::i64 , Custom);
289 setOperationAction(ISD::JumpTable , MVT::i64 , Custom);
290 setOperationAction(ISD::GlobalAddress , MVT::i64 , Custom);
291 setOperationAction(ISD::ExternalSymbol, MVT::i64 , Custom);
293 // 64-bit addm sub, shl, sra, srl (iff 32-bit x86)
294 setOperationAction(ISD::SHL_PARTS , MVT::i32 , Custom);
295 setOperationAction(ISD::SRA_PARTS , MVT::i32 , Custom);
296 setOperationAction(ISD::SRL_PARTS , MVT::i32 , Custom);
297 if (Subtarget->is64Bit()) {
298 setOperationAction(ISD::SHL_PARTS , MVT::i64 , Custom);
299 setOperationAction(ISD::SRA_PARTS , MVT::i64 , Custom);
300 setOperationAction(ISD::SRL_PARTS , MVT::i64 , Custom);
303 if (Subtarget->hasSSE1())
304 setOperationAction(ISD::PREFETCH , MVT::Other, Legal);
306 if (!Subtarget->hasSSE2())
307 setOperationAction(ISD::MEMBARRIER , MVT::Other, Expand);
309 // Expand certain atomics
310 setOperationAction(ISD::ATOMIC_CMP_SWAP, MVT::i8, Custom);
311 setOperationAction(ISD::ATOMIC_CMP_SWAP, MVT::i16, Custom);
312 setOperationAction(ISD::ATOMIC_CMP_SWAP, MVT::i32, Custom);
313 setOperationAction(ISD::ATOMIC_CMP_SWAP, MVT::i64, Custom);
315 setOperationAction(ISD::ATOMIC_LOAD_SUB, MVT::i8, Custom);
316 setOperationAction(ISD::ATOMIC_LOAD_SUB, MVT::i16, Custom);
317 setOperationAction(ISD::ATOMIC_LOAD_SUB, MVT::i32, Custom);
318 setOperationAction(ISD::ATOMIC_LOAD_SUB, MVT::i64, Custom);
320 if (!Subtarget->is64Bit()) {
321 setOperationAction(ISD::ATOMIC_LOAD_ADD, MVT::i64, Custom);
322 setOperationAction(ISD::ATOMIC_LOAD_SUB, MVT::i64, Custom);
323 setOperationAction(ISD::ATOMIC_LOAD_AND, MVT::i64, Custom);
324 setOperationAction(ISD::ATOMIC_LOAD_OR, MVT::i64, Custom);
325 setOperationAction(ISD::ATOMIC_LOAD_XOR, MVT::i64, Custom);
326 setOperationAction(ISD::ATOMIC_LOAD_NAND, MVT::i64, Custom);
327 setOperationAction(ISD::ATOMIC_SWAP, MVT::i64, Custom);
330 // Use the default ISD::DBG_STOPPOINT, ISD::DECLARE expansion.
331 setOperationAction(ISD::DBG_STOPPOINT, MVT::Other, Expand);
332 // FIXME - use subtarget debug flags
333 if (!Subtarget->isTargetDarwin() &&
334 !Subtarget->isTargetELF() &&
335 !Subtarget->isTargetCygMing()) {
336 setOperationAction(ISD::DBG_LABEL, MVT::Other, Expand);
337 setOperationAction(ISD::EH_LABEL, MVT::Other, Expand);
340 setOperationAction(ISD::EXCEPTIONADDR, MVT::i64, Expand);
341 setOperationAction(ISD::EHSELECTION, MVT::i64, Expand);
342 setOperationAction(ISD::EXCEPTIONADDR, MVT::i32, Expand);
343 setOperationAction(ISD::EHSELECTION, MVT::i32, Expand);
344 if (Subtarget->is64Bit()) {
345 setExceptionPointerRegister(X86::RAX);
346 setExceptionSelectorRegister(X86::RDX);
348 setExceptionPointerRegister(X86::EAX);
349 setExceptionSelectorRegister(X86::EDX);
351 setOperationAction(ISD::FRAME_TO_ARGS_OFFSET, MVT::i32, Custom);
352 setOperationAction(ISD::FRAME_TO_ARGS_OFFSET, MVT::i64, Custom);
354 setOperationAction(ISD::TRAMPOLINE, MVT::Other, Custom);
356 setOperationAction(ISD::TRAP, MVT::Other, Legal);
358 // VASTART needs to be custom lowered to use the VarArgsFrameIndex
359 setOperationAction(ISD::VASTART , MVT::Other, Custom);
360 setOperationAction(ISD::VAEND , MVT::Other, Expand);
361 if (Subtarget->is64Bit()) {
362 setOperationAction(ISD::VAARG , MVT::Other, Custom);
363 setOperationAction(ISD::VACOPY , MVT::Other, Custom);
365 setOperationAction(ISD::VAARG , MVT::Other, Expand);
366 setOperationAction(ISD::VACOPY , MVT::Other, Expand);
369 setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
370 setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
371 if (Subtarget->is64Bit())
372 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i64, Expand);
373 if (Subtarget->isTargetCygMing())
374 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Custom);
376 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Expand);
378 if (!UseSoftFloat && X86ScalarSSEf64) {
379 // f32 and f64 use SSE.
380 // Set up the FP register classes.
381 addRegisterClass(MVT::f32, X86::FR32RegisterClass);
382 addRegisterClass(MVT::f64, X86::FR64RegisterClass);
384 // Use ANDPD to simulate FABS.
385 setOperationAction(ISD::FABS , MVT::f64, Custom);
386 setOperationAction(ISD::FABS , MVT::f32, Custom);
388 // Use XORP to simulate FNEG.
389 setOperationAction(ISD::FNEG , MVT::f64, Custom);
390 setOperationAction(ISD::FNEG , MVT::f32, Custom);
392 // Use ANDPD and ORPD to simulate FCOPYSIGN.
393 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Custom);
394 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
396 // We don't support sin/cos/fmod
397 setOperationAction(ISD::FSIN , MVT::f64, Expand);
398 setOperationAction(ISD::FCOS , MVT::f64, Expand);
399 setOperationAction(ISD::FSIN , MVT::f32, Expand);
400 setOperationAction(ISD::FCOS , MVT::f32, Expand);
402 // Expand FP immediates into loads from the stack, except for the special
404 addLegalFPImmediate(APFloat(+0.0)); // xorpd
405 addLegalFPImmediate(APFloat(+0.0f)); // xorps
407 // Floating truncations from f80 and extensions to f80 go through memory.
408 // If optimizing, we lie about this though and handle it in
409 // InstructionSelectPreprocess so that dagcombine2 can hack on these.
411 setConvertAction(MVT::f32, MVT::f80, Expand);
412 setConvertAction(MVT::f64, MVT::f80, Expand);
413 setConvertAction(MVT::f80, MVT::f32, Expand);
414 setConvertAction(MVT::f80, MVT::f64, Expand);
416 } else if (!UseSoftFloat && X86ScalarSSEf32) {
417 // Use SSE for f32, x87 for f64.
418 // Set up the FP register classes.
419 addRegisterClass(MVT::f32, X86::FR32RegisterClass);
420 addRegisterClass(MVT::f64, X86::RFP64RegisterClass);
422 // Use ANDPS to simulate FABS.
423 setOperationAction(ISD::FABS , MVT::f32, Custom);
425 // Use XORP to simulate FNEG.
426 setOperationAction(ISD::FNEG , MVT::f32, Custom);
428 setOperationAction(ISD::UNDEF, MVT::f64, Expand);
430 // Use ANDPS and ORPS to simulate FCOPYSIGN.
431 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
432 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
434 // We don't support sin/cos/fmod
435 setOperationAction(ISD::FSIN , MVT::f32, Expand);
436 setOperationAction(ISD::FCOS , MVT::f32, Expand);
438 // Special cases we handle for FP constants.
439 addLegalFPImmediate(APFloat(+0.0f)); // xorps
440 addLegalFPImmediate(APFloat(+0.0)); // FLD0
441 addLegalFPImmediate(APFloat(+1.0)); // FLD1
442 addLegalFPImmediate(APFloat(-0.0)); // FLD0/FCHS
443 addLegalFPImmediate(APFloat(-1.0)); // FLD1/FCHS
445 // SSE <-> X87 conversions go through memory. If optimizing, we lie about
446 // this though and handle it in InstructionSelectPreprocess so that
447 // dagcombine2 can hack on these.
449 setConvertAction(MVT::f32, MVT::f64, Expand);
450 setConvertAction(MVT::f32, MVT::f80, Expand);
451 setConvertAction(MVT::f80, MVT::f32, Expand);
452 setConvertAction(MVT::f64, MVT::f32, Expand);
453 // And x87->x87 truncations also.
454 setConvertAction(MVT::f80, MVT::f64, Expand);
458 setOperationAction(ISD::FSIN , MVT::f64 , Expand);
459 setOperationAction(ISD::FCOS , MVT::f64 , Expand);
461 } else if (!UseSoftFloat) {
462 // f32 and f64 in x87.
463 // Set up the FP register classes.
464 addRegisterClass(MVT::f64, X86::RFP64RegisterClass);
465 addRegisterClass(MVT::f32, X86::RFP32RegisterClass);
467 setOperationAction(ISD::UNDEF, MVT::f64, Expand);
468 setOperationAction(ISD::UNDEF, MVT::f32, Expand);
469 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
470 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand);
472 // Floating truncations go through memory. If optimizing, we lie about
473 // this though and handle it in InstructionSelectPreprocess so that
474 // dagcombine2 can hack on these.
476 setConvertAction(MVT::f80, MVT::f32, Expand);
477 setConvertAction(MVT::f64, MVT::f32, Expand);
478 setConvertAction(MVT::f80, MVT::f64, Expand);
482 setOperationAction(ISD::FSIN , MVT::f64 , Expand);
483 setOperationAction(ISD::FCOS , MVT::f64 , Expand);
485 addLegalFPImmediate(APFloat(+0.0)); // FLD0
486 addLegalFPImmediate(APFloat(+1.0)); // FLD1
487 addLegalFPImmediate(APFloat(-0.0)); // FLD0/FCHS
488 addLegalFPImmediate(APFloat(-1.0)); // FLD1/FCHS
489 addLegalFPImmediate(APFloat(+0.0f)); // FLD0
490 addLegalFPImmediate(APFloat(+1.0f)); // FLD1
491 addLegalFPImmediate(APFloat(-0.0f)); // FLD0/FCHS
492 addLegalFPImmediate(APFloat(-1.0f)); // FLD1/FCHS
495 // Long double always uses X87.
497 addRegisterClass(MVT::f80, X86::RFP80RegisterClass);
498 setOperationAction(ISD::UNDEF, MVT::f80, Expand);
499 setOperationAction(ISD::FCOPYSIGN, MVT::f80, Expand);
502 APFloat TmpFlt(+0.0);
503 TmpFlt.convert(APFloat::x87DoubleExtended, APFloat::rmNearestTiesToEven,
505 addLegalFPImmediate(TmpFlt); // FLD0
507 addLegalFPImmediate(TmpFlt); // FLD0/FCHS
508 APFloat TmpFlt2(+1.0);
509 TmpFlt2.convert(APFloat::x87DoubleExtended, APFloat::rmNearestTiesToEven,
511 addLegalFPImmediate(TmpFlt2); // FLD1
512 TmpFlt2.changeSign();
513 addLegalFPImmediate(TmpFlt2); // FLD1/FCHS
517 setOperationAction(ISD::FSIN , MVT::f80 , Expand);
518 setOperationAction(ISD::FCOS , MVT::f80 , Expand);
522 // Always use a library call for pow.
523 setOperationAction(ISD::FPOW , MVT::f32 , Expand);
524 setOperationAction(ISD::FPOW , MVT::f64 , Expand);
525 setOperationAction(ISD::FPOW , MVT::f80 , Expand);
527 setOperationAction(ISD::FLOG, MVT::f80, Expand);
528 setOperationAction(ISD::FLOG2, MVT::f80, Expand);
529 setOperationAction(ISD::FLOG10, MVT::f80, Expand);
530 setOperationAction(ISD::FEXP, MVT::f80, Expand);
531 setOperationAction(ISD::FEXP2, MVT::f80, Expand);
533 // First set operation action for all vector types to either promote
534 // (for widening) or expand (for scalarization). Then we will selectively
535 // turn on ones that can be effectively codegen'd.
536 for (unsigned VT = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
537 VT <= (unsigned)MVT::LAST_VECTOR_VALUETYPE; ++VT) {
538 setOperationAction(ISD::ADD , (MVT::SimpleValueType)VT, Expand);
539 setOperationAction(ISD::SUB , (MVT::SimpleValueType)VT, Expand);
540 setOperationAction(ISD::FADD, (MVT::SimpleValueType)VT, Expand);
541 setOperationAction(ISD::FNEG, (MVT::SimpleValueType)VT, Expand);
542 setOperationAction(ISD::FSUB, (MVT::SimpleValueType)VT, Expand);
543 setOperationAction(ISD::MUL , (MVT::SimpleValueType)VT, Expand);
544 setOperationAction(ISD::FMUL, (MVT::SimpleValueType)VT, Expand);
545 setOperationAction(ISD::SDIV, (MVT::SimpleValueType)VT, Expand);
546 setOperationAction(ISD::UDIV, (MVT::SimpleValueType)VT, Expand);
547 setOperationAction(ISD::FDIV, (MVT::SimpleValueType)VT, Expand);
548 setOperationAction(ISD::SREM, (MVT::SimpleValueType)VT, Expand);
549 setOperationAction(ISD::UREM, (MVT::SimpleValueType)VT, Expand);
550 setOperationAction(ISD::LOAD, (MVT::SimpleValueType)VT, Expand);
551 setOperationAction(ISD::VECTOR_SHUFFLE, (MVT::SimpleValueType)VT, Expand);
552 setOperationAction(ISD::EXTRACT_VECTOR_ELT,(MVT::SimpleValueType)VT,Expand);
553 setOperationAction(ISD::INSERT_VECTOR_ELT,(MVT::SimpleValueType)VT, Expand);
554 setOperationAction(ISD::FABS, (MVT::SimpleValueType)VT, Expand);
555 setOperationAction(ISD::FSIN, (MVT::SimpleValueType)VT, Expand);
556 setOperationAction(ISD::FCOS, (MVT::SimpleValueType)VT, Expand);
557 setOperationAction(ISD::FREM, (MVT::SimpleValueType)VT, Expand);
558 setOperationAction(ISD::FPOWI, (MVT::SimpleValueType)VT, Expand);
559 setOperationAction(ISD::FSQRT, (MVT::SimpleValueType)VT, Expand);
560 setOperationAction(ISD::FCOPYSIGN, (MVT::SimpleValueType)VT, Expand);
561 setOperationAction(ISD::SMUL_LOHI, (MVT::SimpleValueType)VT, Expand);
562 setOperationAction(ISD::UMUL_LOHI, (MVT::SimpleValueType)VT, Expand);
563 setOperationAction(ISD::SDIVREM, (MVT::SimpleValueType)VT, Expand);
564 setOperationAction(ISD::UDIVREM, (MVT::SimpleValueType)VT, Expand);
565 setOperationAction(ISD::FPOW, (MVT::SimpleValueType)VT, Expand);
566 setOperationAction(ISD::CTPOP, (MVT::SimpleValueType)VT, Expand);
567 setOperationAction(ISD::CTTZ, (MVT::SimpleValueType)VT, Expand);
568 setOperationAction(ISD::CTLZ, (MVT::SimpleValueType)VT, Expand);
569 setOperationAction(ISD::SHL, (MVT::SimpleValueType)VT, Expand);
570 setOperationAction(ISD::SRA, (MVT::SimpleValueType)VT, Expand);
571 setOperationAction(ISD::SRL, (MVT::SimpleValueType)VT, Expand);
572 setOperationAction(ISD::ROTL, (MVT::SimpleValueType)VT, Expand);
573 setOperationAction(ISD::ROTR, (MVT::SimpleValueType)VT, Expand);
574 setOperationAction(ISD::BSWAP, (MVT::SimpleValueType)VT, Expand);
575 setOperationAction(ISD::VSETCC, (MVT::SimpleValueType)VT, Expand);
576 setOperationAction(ISD::FLOG, (MVT::SimpleValueType)VT, Expand);
577 setOperationAction(ISD::FLOG2, (MVT::SimpleValueType)VT, Expand);
578 setOperationAction(ISD::FLOG10, (MVT::SimpleValueType)VT, Expand);
579 setOperationAction(ISD::FEXP, (MVT::SimpleValueType)VT, Expand);
580 setOperationAction(ISD::FEXP2, (MVT::SimpleValueType)VT, Expand);
583 // FIXME: In order to prevent SSE instructions being expanded to MMX ones
584 // with -msoft-float, disable use of MMX as well.
585 if (!UseSoftFloat && !DisableMMX && Subtarget->hasMMX()) {
586 addRegisterClass(MVT::v8i8, X86::VR64RegisterClass);
587 addRegisterClass(MVT::v4i16, X86::VR64RegisterClass);
588 addRegisterClass(MVT::v2i32, X86::VR64RegisterClass);
589 addRegisterClass(MVT::v2f32, X86::VR64RegisterClass);
590 addRegisterClass(MVT::v1i64, X86::VR64RegisterClass);
592 setOperationAction(ISD::ADD, MVT::v8i8, Legal);
593 setOperationAction(ISD::ADD, MVT::v4i16, Legal);
594 setOperationAction(ISD::ADD, MVT::v2i32, Legal);
595 setOperationAction(ISD::ADD, MVT::v1i64, Legal);
597 setOperationAction(ISD::SUB, MVT::v8i8, Legal);
598 setOperationAction(ISD::SUB, MVT::v4i16, Legal);
599 setOperationAction(ISD::SUB, MVT::v2i32, Legal);
600 setOperationAction(ISD::SUB, MVT::v1i64, Legal);
602 setOperationAction(ISD::MULHS, MVT::v4i16, Legal);
603 setOperationAction(ISD::MUL, MVT::v4i16, Legal);
605 setOperationAction(ISD::AND, MVT::v8i8, Promote);
606 AddPromotedToType (ISD::AND, MVT::v8i8, MVT::v1i64);
607 setOperationAction(ISD::AND, MVT::v4i16, Promote);
608 AddPromotedToType (ISD::AND, MVT::v4i16, MVT::v1i64);
609 setOperationAction(ISD::AND, MVT::v2i32, Promote);
610 AddPromotedToType (ISD::AND, MVT::v2i32, MVT::v1i64);
611 setOperationAction(ISD::AND, MVT::v1i64, Legal);
613 setOperationAction(ISD::OR, MVT::v8i8, Promote);
614 AddPromotedToType (ISD::OR, MVT::v8i8, MVT::v1i64);
615 setOperationAction(ISD::OR, MVT::v4i16, Promote);
616 AddPromotedToType (ISD::OR, MVT::v4i16, MVT::v1i64);
617 setOperationAction(ISD::OR, MVT::v2i32, Promote);
618 AddPromotedToType (ISD::OR, MVT::v2i32, MVT::v1i64);
619 setOperationAction(ISD::OR, MVT::v1i64, Legal);
621 setOperationAction(ISD::XOR, MVT::v8i8, Promote);
622 AddPromotedToType (ISD::XOR, MVT::v8i8, MVT::v1i64);
623 setOperationAction(ISD::XOR, MVT::v4i16, Promote);
624 AddPromotedToType (ISD::XOR, MVT::v4i16, MVT::v1i64);
625 setOperationAction(ISD::XOR, MVT::v2i32, Promote);
626 AddPromotedToType (ISD::XOR, MVT::v2i32, MVT::v1i64);
627 setOperationAction(ISD::XOR, MVT::v1i64, Legal);
629 setOperationAction(ISD::LOAD, MVT::v8i8, Promote);
630 AddPromotedToType (ISD::LOAD, MVT::v8i8, MVT::v1i64);
631 setOperationAction(ISD::LOAD, MVT::v4i16, Promote);
632 AddPromotedToType (ISD::LOAD, MVT::v4i16, MVT::v1i64);
633 setOperationAction(ISD::LOAD, MVT::v2i32, Promote);
634 AddPromotedToType (ISD::LOAD, MVT::v2i32, MVT::v1i64);
635 setOperationAction(ISD::LOAD, MVT::v2f32, Promote);
636 AddPromotedToType (ISD::LOAD, MVT::v2f32, MVT::v1i64);
637 setOperationAction(ISD::LOAD, MVT::v1i64, Legal);
639 setOperationAction(ISD::BUILD_VECTOR, MVT::v8i8, Custom);
640 setOperationAction(ISD::BUILD_VECTOR, MVT::v4i16, Custom);
641 setOperationAction(ISD::BUILD_VECTOR, MVT::v2i32, Custom);
642 setOperationAction(ISD::BUILD_VECTOR, MVT::v2f32, Custom);
643 setOperationAction(ISD::BUILD_VECTOR, MVT::v1i64, Custom);
645 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v8i8, Custom);
646 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v4i16, Custom);
647 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2i32, Custom);
648 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v1i64, Custom);
650 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v2f32, Custom);
651 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v8i8, Custom);
652 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v4i16, Custom);
653 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v1i64, Custom);
655 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4i16, Custom);
657 setTruncStoreAction(MVT::v8i16, MVT::v8i8, Expand);
658 setOperationAction(ISD::TRUNCATE, MVT::v8i8, Expand);
659 setOperationAction(ISD::SELECT, MVT::v8i8, Promote);
660 setOperationAction(ISD::SELECT, MVT::v4i16, Promote);
661 setOperationAction(ISD::SELECT, MVT::v2i32, Promote);
662 setOperationAction(ISD::SELECT, MVT::v1i64, Custom);
665 if (!UseSoftFloat && Subtarget->hasSSE1()) {
666 addRegisterClass(MVT::v4f32, X86::VR128RegisterClass);
668 setOperationAction(ISD::FADD, MVT::v4f32, Legal);
669 setOperationAction(ISD::FSUB, MVT::v4f32, Legal);
670 setOperationAction(ISD::FMUL, MVT::v4f32, Legal);
671 setOperationAction(ISD::FDIV, MVT::v4f32, Legal);
672 setOperationAction(ISD::FSQRT, MVT::v4f32, Legal);
673 setOperationAction(ISD::FNEG, MVT::v4f32, Custom);
674 setOperationAction(ISD::LOAD, MVT::v4f32, Legal);
675 setOperationAction(ISD::BUILD_VECTOR, MVT::v4f32, Custom);
676 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v4f32, Custom);
677 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4f32, Custom);
678 setOperationAction(ISD::SELECT, MVT::v4f32, Custom);
679 setOperationAction(ISD::VSETCC, MVT::v4f32, Custom);
682 if (!UseSoftFloat && Subtarget->hasSSE2()) {
683 addRegisterClass(MVT::v2f64, X86::VR128RegisterClass);
685 // FIXME: Unfortunately -soft-float means XMM registers cannot be used even
686 // for integer operations.
687 addRegisterClass(MVT::v16i8, X86::VR128RegisterClass);
688 addRegisterClass(MVT::v8i16, X86::VR128RegisterClass);
689 addRegisterClass(MVT::v4i32, X86::VR128RegisterClass);
690 addRegisterClass(MVT::v2i64, X86::VR128RegisterClass);
692 setOperationAction(ISD::ADD, MVT::v16i8, Legal);
693 setOperationAction(ISD::ADD, MVT::v8i16, Legal);
694 setOperationAction(ISD::ADD, MVT::v4i32, Legal);
695 setOperationAction(ISD::ADD, MVT::v2i64, Legal);
696 setOperationAction(ISD::MUL, MVT::v2i64, Custom);
697 setOperationAction(ISD::SUB, MVT::v16i8, Legal);
698 setOperationAction(ISD::SUB, MVT::v8i16, Legal);
699 setOperationAction(ISD::SUB, MVT::v4i32, Legal);
700 setOperationAction(ISD::SUB, MVT::v2i64, Legal);
701 setOperationAction(ISD::MUL, MVT::v8i16, Legal);
702 setOperationAction(ISD::FADD, MVT::v2f64, Legal);
703 setOperationAction(ISD::FSUB, MVT::v2f64, Legal);
704 setOperationAction(ISD::FMUL, MVT::v2f64, Legal);
705 setOperationAction(ISD::FDIV, MVT::v2f64, Legal);
706 setOperationAction(ISD::FSQRT, MVT::v2f64, Legal);
707 setOperationAction(ISD::FNEG, MVT::v2f64, Custom);
709 setOperationAction(ISD::VSETCC, MVT::v2f64, Custom);
710 setOperationAction(ISD::VSETCC, MVT::v16i8, Custom);
711 setOperationAction(ISD::VSETCC, MVT::v8i16, Custom);
712 setOperationAction(ISD::VSETCC, MVT::v4i32, Custom);
714 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v16i8, Custom);
715 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v8i16, Custom);
716 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8i16, Custom);
717 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4i32, Custom);
718 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4f32, Custom);
720 // Custom lower build_vector, vector_shuffle, and extract_vector_elt.
721 for (unsigned i = (unsigned)MVT::v16i8; i != (unsigned)MVT::v2i64; ++i) {
722 MVT VT = (MVT::SimpleValueType)i;
723 // Do not attempt to custom lower non-power-of-2 vectors
724 if (!isPowerOf2_32(VT.getVectorNumElements()))
726 setOperationAction(ISD::BUILD_VECTOR, VT, Custom);
727 setOperationAction(ISD::VECTOR_SHUFFLE, VT, Custom);
728 setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Custom);
730 setOperationAction(ISD::BUILD_VECTOR, MVT::v2f64, Custom);
731 setOperationAction(ISD::BUILD_VECTOR, MVT::v2i64, Custom);
732 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2f64, Custom);
733 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2i64, Custom);
734 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2f64, Custom);
735 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2f64, Custom);
736 if (Subtarget->is64Bit()) {
737 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2i64, Custom);
738 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2i64, Custom);
741 // Promote v16i8, v8i16, v4i32 load, select, and, or, xor to v2i64.
742 for (unsigned VT = (unsigned)MVT::v16i8; VT != (unsigned)MVT::v2i64; VT++) {
743 setOperationAction(ISD::AND, (MVT::SimpleValueType)VT, Promote);
744 AddPromotedToType (ISD::AND, (MVT::SimpleValueType)VT, MVT::v2i64);
745 setOperationAction(ISD::OR, (MVT::SimpleValueType)VT, Promote);
746 AddPromotedToType (ISD::OR, (MVT::SimpleValueType)VT, MVT::v2i64);
747 setOperationAction(ISD::XOR, (MVT::SimpleValueType)VT, Promote);
748 AddPromotedToType (ISD::XOR, (MVT::SimpleValueType)VT, MVT::v2i64);
749 setOperationAction(ISD::LOAD, (MVT::SimpleValueType)VT, Promote);
750 AddPromotedToType (ISD::LOAD, (MVT::SimpleValueType)VT, MVT::v2i64);
751 setOperationAction(ISD::SELECT, (MVT::SimpleValueType)VT, Promote);
752 AddPromotedToType (ISD::SELECT, (MVT::SimpleValueType)VT, MVT::v2i64);
755 setTruncStoreAction(MVT::f64, MVT::f32, Expand);
757 // Custom lower v2i64 and v2f64 selects.
758 setOperationAction(ISD::LOAD, MVT::v2f64, Legal);
759 setOperationAction(ISD::LOAD, MVT::v2i64, Legal);
760 setOperationAction(ISD::SELECT, MVT::v2f64, Custom);
761 setOperationAction(ISD::SELECT, MVT::v2i64, Custom);
765 if (Subtarget->hasSSE41()) {
766 // FIXME: Do we need to handle scalar-to-vector here?
767 setOperationAction(ISD::MUL, MVT::v4i32, Legal);
769 // i8 and i16 vectors are custom , because the source register and source
770 // source memory operand types are not the same width. f32 vectors are
771 // custom since the immediate controlling the insert encodes additional
773 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v16i8, Custom);
774 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8i16, Custom);
775 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4i32, Custom);
776 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4f32, Custom);
778 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v16i8, Custom);
779 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v8i16, Custom);
780 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4i32, Custom);
781 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4f32, Custom);
783 if (Subtarget->is64Bit()) {
784 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2i64, Legal);
785 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2i64, Legal);
789 if (Subtarget->hasSSE42()) {
790 setOperationAction(ISD::VSETCC, MVT::v2i64, Custom);
793 // We want to custom lower some of our intrinsics.
794 setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
796 // Add/Sub/Mul with overflow operations are custom lowered.
797 setOperationAction(ISD::SADDO, MVT::i32, Custom);
798 setOperationAction(ISD::SADDO, MVT::i64, Custom);
799 setOperationAction(ISD::UADDO, MVT::i32, Custom);
800 setOperationAction(ISD::UADDO, MVT::i64, Custom);
801 setOperationAction(ISD::SSUBO, MVT::i32, Custom);
802 setOperationAction(ISD::SSUBO, MVT::i64, Custom);
803 setOperationAction(ISD::USUBO, MVT::i32, Custom);
804 setOperationAction(ISD::USUBO, MVT::i64, Custom);
805 setOperationAction(ISD::SMULO, MVT::i32, Custom);
806 setOperationAction(ISD::SMULO, MVT::i64, Custom);
807 setOperationAction(ISD::UMULO, MVT::i32, Custom);
808 setOperationAction(ISD::UMULO, MVT::i64, Custom);
810 // We have target-specific dag combine patterns for the following nodes:
811 setTargetDAGCombine(ISD::VECTOR_SHUFFLE);
812 setTargetDAGCombine(ISD::BUILD_VECTOR);
813 setTargetDAGCombine(ISD::SELECT);
814 setTargetDAGCombine(ISD::SHL);
815 setTargetDAGCombine(ISD::SRA);
816 setTargetDAGCombine(ISD::SRL);
817 setTargetDAGCombine(ISD::STORE);
819 computeRegisterProperties();
821 // FIXME: These should be based on subtarget info. Plus, the values should
822 // be smaller when we are in optimizing for size mode.
823 maxStoresPerMemset = 16; // For @llvm.memset -> sequence of stores
824 maxStoresPerMemcpy = 16; // For @llvm.memcpy -> sequence of stores
825 maxStoresPerMemmove = 3; // For @llvm.memmove -> sequence of stores
826 allowUnalignedMemoryAccesses = true; // x86 supports it!
827 setPrefLoopAlignment(16);
831 MVT X86TargetLowering::getSetCCResultType(MVT VT) const {
836 /// getMaxByValAlign - Helper for getByValTypeAlignment to determine
837 /// the desired ByVal argument alignment.
838 static void getMaxByValAlign(const Type *Ty, unsigned &MaxAlign) {
841 if (const VectorType *VTy = dyn_cast<VectorType>(Ty)) {
842 if (VTy->getBitWidth() == 128)
844 } else if (const ArrayType *ATy = dyn_cast<ArrayType>(Ty)) {
845 unsigned EltAlign = 0;
846 getMaxByValAlign(ATy->getElementType(), EltAlign);
847 if (EltAlign > MaxAlign)
849 } else if (const StructType *STy = dyn_cast<StructType>(Ty)) {
850 for (unsigned i = 0, e = STy->getNumElements(); i != e; ++i) {
851 unsigned EltAlign = 0;
852 getMaxByValAlign(STy->getElementType(i), EltAlign);
853 if (EltAlign > MaxAlign)
862 /// getByValTypeAlignment - Return the desired alignment for ByVal aggregate
863 /// function arguments in the caller parameter area. For X86, aggregates
864 /// that contain SSE vectors are placed at 16-byte boundaries while the rest
865 /// are at 4-byte boundaries.
866 unsigned X86TargetLowering::getByValTypeAlignment(const Type *Ty) const {
867 if (Subtarget->is64Bit()) {
868 // Max of 8 and alignment of type.
869 unsigned TyAlign = TD->getABITypeAlignment(Ty);
876 if (Subtarget->hasSSE1())
877 getMaxByValAlign(Ty, Align);
881 /// getOptimalMemOpType - Returns the target specific optimal type for load
882 /// and store operations as a result of memset, memcpy, and memmove
883 /// lowering. It returns MVT::iAny if SelectionDAG should be responsible for
886 X86TargetLowering::getOptimalMemOpType(uint64_t Size, unsigned Align,
887 bool isSrcConst, bool isSrcStr) const {
888 // FIXME: This turns off use of xmm stores for memset/memcpy on targets like
889 // linux. This is because the stack realignment code can't handle certain
890 // cases like PR2962. This should be removed when PR2962 is fixed.
891 if (Subtarget->getStackAlignment() >= 16) {
892 if ((isSrcConst || isSrcStr) && Subtarget->hasSSE2() && Size >= 16)
894 if ((isSrcConst || isSrcStr) && Subtarget->hasSSE1() && Size >= 16)
897 if (Subtarget->is64Bit() && Size >= 8)
903 /// getPICJumpTableRelocaBase - Returns relocation base for the given PIC
905 SDValue X86TargetLowering::getPICJumpTableRelocBase(SDValue Table,
906 SelectionDAG &DAG) const {
907 if (usesGlobalOffsetTable())
908 return DAG.getGLOBAL_OFFSET_TABLE(getPointerTy());
909 if (!Subtarget->isPICStyleRIPRel())
910 // This doesn't have DebugLoc associated with it, but is not really the
911 // same as a Register.
912 return DAG.getNode(X86ISD::GlobalBaseReg, DebugLoc::getUnknownLoc(),
917 //===----------------------------------------------------------------------===//
918 // Return Value Calling Convention Implementation
919 //===----------------------------------------------------------------------===//
921 #include "X86GenCallingConv.inc"
923 /// LowerRET - Lower an ISD::RET node.
924 SDValue X86TargetLowering::LowerRET(SDValue Op, SelectionDAG &DAG) {
925 DebugLoc dl = Op.getDebugLoc();
926 assert((Op.getNumOperands() & 1) == 1 && "ISD::RET should have odd # args");
928 SmallVector<CCValAssign, 16> RVLocs;
929 unsigned CC = DAG.getMachineFunction().getFunction()->getCallingConv();
930 bool isVarArg = DAG.getMachineFunction().getFunction()->isVarArg();
931 CCState CCInfo(CC, isVarArg, getTargetMachine(), RVLocs);
932 CCInfo.AnalyzeReturn(Op.getNode(), RetCC_X86);
934 // If this is the first return lowered for this function, add the regs to the
935 // liveout set for the function.
936 if (DAG.getMachineFunction().getRegInfo().liveout_empty()) {
937 for (unsigned i = 0; i != RVLocs.size(); ++i)
938 if (RVLocs[i].isRegLoc())
939 DAG.getMachineFunction().getRegInfo().addLiveOut(RVLocs[i].getLocReg());
941 SDValue Chain = Op.getOperand(0);
943 // Handle tail call return.
944 Chain = GetPossiblePreceedingTailCall(Chain, X86ISD::TAILCALL);
945 if (Chain.getOpcode() == X86ISD::TAILCALL) {
946 SDValue TailCall = Chain;
947 SDValue TargetAddress = TailCall.getOperand(1);
948 SDValue StackAdjustment = TailCall.getOperand(2);
949 assert(((TargetAddress.getOpcode() == ISD::Register &&
950 (cast<RegisterSDNode>(TargetAddress)->getReg() == X86::EAX ||
951 cast<RegisterSDNode>(TargetAddress)->getReg() == X86::R9)) ||
952 TargetAddress.getOpcode() == ISD::TargetExternalSymbol ||
953 TargetAddress.getOpcode() == ISD::TargetGlobalAddress) &&
954 "Expecting an global address, external symbol, or register");
955 assert(StackAdjustment.getOpcode() == ISD::Constant &&
956 "Expecting a const value");
958 SmallVector<SDValue,8> Operands;
959 Operands.push_back(Chain.getOperand(0));
960 Operands.push_back(TargetAddress);
961 Operands.push_back(StackAdjustment);
962 // Copy registers used by the call. Last operand is a flag so it is not
964 for (unsigned i=3; i < TailCall.getNumOperands()-1; i++) {
965 Operands.push_back(Chain.getOperand(i));
967 return DAG.getNode(X86ISD::TC_RETURN, dl, MVT::Other, &Operands[0],
974 SmallVector<SDValue, 6> RetOps;
975 RetOps.push_back(Chain); // Operand #0 = Chain (updated below)
976 // Operand #1 = Bytes To Pop
977 RetOps.push_back(DAG.getConstant(getBytesToPopOnReturn(), MVT::i16));
979 // Copy the result values into the output registers.
980 for (unsigned i = 0; i != RVLocs.size(); ++i) {
981 CCValAssign &VA = RVLocs[i];
982 assert(VA.isRegLoc() && "Can only return in registers!");
983 SDValue ValToCopy = Op.getOperand(i*2+1);
985 // Returns in ST0/ST1 are handled specially: these are pushed as operands to
986 // the RET instruction and handled by the FP Stackifier.
987 if (VA.getLocReg() == X86::ST0 ||
988 VA.getLocReg() == X86::ST1) {
989 // If this is a copy from an xmm register to ST(0), use an FPExtend to
990 // change the value to the FP stack register class.
991 if (isScalarFPTypeInSSEReg(VA.getValVT()))
992 ValToCopy = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f80, ValToCopy);
993 RetOps.push_back(ValToCopy);
994 // Don't emit a copytoreg.
998 // 64-bit vector (MMX) values are returned in XMM0 / XMM1 except for v1i64
999 // which is returned in RAX / RDX.
1000 if (Subtarget->is64Bit()) {
1001 MVT ValVT = ValToCopy.getValueType();
1002 if (ValVT.isVector() && ValVT.getSizeInBits() == 64) {
1003 ValToCopy = DAG.getNode(ISD::BIT_CONVERT, dl, MVT::i64, ValToCopy);
1004 if (VA.getLocReg() == X86::XMM0 || VA.getLocReg() == X86::XMM1)
1005 ValToCopy = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2i64, ValToCopy);
1009 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), ValToCopy, Flag);
1010 Flag = Chain.getValue(1);
1013 // The x86-64 ABI for returning structs by value requires that we copy
1014 // the sret argument into %rax for the return. We saved the argument into
1015 // a virtual register in the entry block, so now we copy the value out
1017 if (Subtarget->is64Bit() &&
1018 DAG.getMachineFunction().getFunction()->hasStructRetAttr()) {
1019 MachineFunction &MF = DAG.getMachineFunction();
1020 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
1021 unsigned Reg = FuncInfo->getSRetReturnReg();
1023 Reg = MF.getRegInfo().createVirtualRegister(getRegClassFor(MVT::i64));
1024 FuncInfo->setSRetReturnReg(Reg);
1026 SDValue Val = DAG.getCopyFromReg(Chain, dl, Reg, getPointerTy());
1028 Chain = DAG.getCopyToReg(Chain, dl, X86::RAX, Val, Flag);
1029 Flag = Chain.getValue(1);
1032 RetOps[0] = Chain; // Update chain.
1034 // Add the flag if we have it.
1036 RetOps.push_back(Flag);
1038 return DAG.getNode(X86ISD::RET_FLAG, dl,
1039 MVT::Other, &RetOps[0], RetOps.size());
1043 /// LowerCallResult - Lower the result values of an ISD::CALL into the
1044 /// appropriate copies out of appropriate physical registers. This assumes that
1045 /// Chain/InFlag are the input chain/flag to use, and that TheCall is the call
1046 /// being lowered. The returns a SDNode with the same number of values as the
1048 SDNode *X86TargetLowering::
1049 LowerCallResult(SDValue Chain, SDValue InFlag, CallSDNode *TheCall,
1050 unsigned CallingConv, SelectionDAG &DAG) {
1052 DebugLoc dl = TheCall->getDebugLoc();
1053 // Assign locations to each value returned by this call.
1054 SmallVector<CCValAssign, 16> RVLocs;
1055 bool isVarArg = TheCall->isVarArg();
1056 bool Is64Bit = Subtarget->is64Bit();
1057 CCState CCInfo(CallingConv, isVarArg, getTargetMachine(), RVLocs);
1058 CCInfo.AnalyzeCallResult(TheCall, RetCC_X86);
1060 SmallVector<SDValue, 8> ResultVals;
1062 // Copy all of the result registers out of their specified physreg.
1063 for (unsigned i = 0; i != RVLocs.size(); ++i) {
1064 CCValAssign &VA = RVLocs[i];
1065 MVT CopyVT = VA.getValVT();
1067 // If this is x86-64, and we disabled SSE, we can't return FP values
1068 if ((CopyVT == MVT::f32 || CopyVT == MVT::f64) &&
1069 ((Is64Bit || TheCall->isInreg()) && !Subtarget->hasSSE1())) {
1070 cerr << "SSE register return with SSE disabled\n";
1074 // If this is a call to a function that returns an fp value on the floating
1075 // point stack, but where we prefer to use the value in xmm registers, copy
1076 // it out as F80 and use a truncate to move it from fp stack reg to xmm reg.
1077 if ((VA.getLocReg() == X86::ST0 ||
1078 VA.getLocReg() == X86::ST1) &&
1079 isScalarFPTypeInSSEReg(VA.getValVT())) {
1084 if (Is64Bit && CopyVT.isVector() && CopyVT.getSizeInBits() == 64) {
1085 // For x86-64, MMX values are returned in XMM0 / XMM1 except for v1i64.
1086 if (VA.getLocReg() == X86::XMM0 || VA.getLocReg() == X86::XMM1) {
1087 Chain = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(),
1088 MVT::v2i64, InFlag).getValue(1);
1089 Val = Chain.getValue(0);
1090 Val = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i64,
1091 Val, DAG.getConstant(0, MVT::i64));
1093 Chain = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(),
1094 MVT::i64, InFlag).getValue(1);
1095 Val = Chain.getValue(0);
1097 Val = DAG.getNode(ISD::BIT_CONVERT, dl, CopyVT, Val);
1099 Chain = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(),
1100 CopyVT, InFlag).getValue(1);
1101 Val = Chain.getValue(0);
1103 InFlag = Chain.getValue(2);
1105 if (CopyVT != VA.getValVT()) {
1106 // Round the F80 the right size, which also moves to the appropriate xmm
1108 Val = DAG.getNode(ISD::FP_ROUND, dl, VA.getValVT(), Val,
1109 // This truncation won't change the value.
1110 DAG.getIntPtrConstant(1));
1113 ResultVals.push_back(Val);
1116 // Merge everything together with a MERGE_VALUES node.
1117 ResultVals.push_back(Chain);
1118 return DAG.getNode(ISD::MERGE_VALUES, dl, TheCall->getVTList(),
1119 &ResultVals[0], ResultVals.size()).getNode();
1123 //===----------------------------------------------------------------------===//
1124 // C & StdCall & Fast Calling Convention implementation
1125 //===----------------------------------------------------------------------===//
1126 // StdCall calling convention seems to be standard for many Windows' API
1127 // routines and around. It differs from C calling convention just a little:
1128 // callee should clean up the stack, not caller. Symbols should be also
1129 // decorated in some fancy way :) It doesn't support any vector arguments.
1130 // For info on fast calling convention see Fast Calling Convention (tail call)
1131 // implementation LowerX86_32FastCCCallTo.
1133 /// AddLiveIn - This helper function adds the specified physical register to the
1134 /// MachineFunction as a live in value. It also creates a corresponding virtual
1135 /// register for it.
1136 static unsigned AddLiveIn(MachineFunction &MF, unsigned PReg,
1137 const TargetRegisterClass *RC) {
1138 assert(RC->contains(PReg) && "Not the correct regclass!");
1139 unsigned VReg = MF.getRegInfo().createVirtualRegister(RC);
1140 MF.getRegInfo().addLiveIn(PReg, VReg);
1144 /// CallIsStructReturn - Determines whether a CALL node uses struct return
1146 static bool CallIsStructReturn(CallSDNode *TheCall) {
1147 unsigned NumOps = TheCall->getNumArgs();
1151 return TheCall->getArgFlags(0).isSRet();
1154 /// ArgsAreStructReturn - Determines whether a FORMAL_ARGUMENTS node uses struct
1155 /// return semantics.
1156 static bool ArgsAreStructReturn(SDValue Op) {
1157 unsigned NumArgs = Op.getNode()->getNumValues() - 1;
1161 return cast<ARG_FLAGSSDNode>(Op.getOperand(3))->getArgFlags().isSRet();
1164 /// IsCalleePop - Determines whether a CALL or FORMAL_ARGUMENTS node requires
1165 /// the callee to pop its own arguments. Callee pop is necessary to support tail
1167 bool X86TargetLowering::IsCalleePop(bool IsVarArg, unsigned CallingConv) {
1171 switch (CallingConv) {
1174 case CallingConv::X86_StdCall:
1175 return !Subtarget->is64Bit();
1176 case CallingConv::X86_FastCall:
1177 return !Subtarget->is64Bit();
1178 case CallingConv::Fast:
1179 return PerformTailCallOpt;
1183 /// CCAssignFnForNode - Selects the correct CCAssignFn for a the
1184 /// given CallingConvention value.
1185 CCAssignFn *X86TargetLowering::CCAssignFnForNode(unsigned CC) const {
1186 if (Subtarget->is64Bit()) {
1187 if (Subtarget->isTargetWin64())
1188 return CC_X86_Win64_C;
1189 else if (CC == CallingConv::Fast && PerformTailCallOpt)
1190 return CC_X86_64_TailCall;
1195 if (CC == CallingConv::X86_FastCall)
1196 return CC_X86_32_FastCall;
1197 else if (CC == CallingConv::Fast)
1198 return CC_X86_32_FastCC;
1203 /// NameDecorationForFORMAL_ARGUMENTS - Selects the appropriate decoration to
1204 /// apply to a MachineFunction containing a given FORMAL_ARGUMENTS node.
1206 X86TargetLowering::NameDecorationForFORMAL_ARGUMENTS(SDValue Op) {
1207 unsigned CC = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
1208 if (CC == CallingConv::X86_FastCall)
1210 else if (CC == CallingConv::X86_StdCall)
1216 /// CallRequiresGOTInRegister - Check whether the call requires the GOT pointer
1217 /// in a register before calling.
1218 bool X86TargetLowering::CallRequiresGOTPtrInReg(bool Is64Bit, bool IsTailCall) {
1219 return !IsTailCall && !Is64Bit &&
1220 getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
1221 Subtarget->isPICStyleGOT();
1224 /// CallRequiresFnAddressInReg - Check whether the call requires the function
1225 /// address to be loaded in a register.
1227 X86TargetLowering::CallRequiresFnAddressInReg(bool Is64Bit, bool IsTailCall) {
1228 return !Is64Bit && IsTailCall &&
1229 getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
1230 Subtarget->isPICStyleGOT();
1233 /// CreateCopyOfByValArgument - Make a copy of an aggregate at address specified
1234 /// by "Src" to address "Dst" with size and alignment information specified by
1235 /// the specific parameter attribute. The copy will be passed as a byval
1236 /// function parameter.
1238 CreateCopyOfByValArgument(SDValue Src, SDValue Dst, SDValue Chain,
1239 ISD::ArgFlagsTy Flags, SelectionDAG &DAG,
1241 SDValue SizeNode = DAG.getConstant(Flags.getByValSize(), MVT::i32);
1242 return DAG.getMemcpy(Chain, dl, Dst, Src, SizeNode, Flags.getByValAlign(),
1243 /*AlwaysInline=*/true, NULL, 0, NULL, 0);
1246 SDValue X86TargetLowering::LowerMemArgument(SDValue Op, SelectionDAG &DAG,
1247 const CCValAssign &VA,
1248 MachineFrameInfo *MFI,
1250 SDValue Root, unsigned i) {
1251 // Create the nodes corresponding to a load from this parameter slot.
1252 ISD::ArgFlagsTy Flags =
1253 cast<ARG_FLAGSSDNode>(Op.getOperand(3 + i))->getArgFlags();
1254 bool AlwaysUseMutable = (CC==CallingConv::Fast) && PerformTailCallOpt;
1255 bool isImmutable = !AlwaysUseMutable && !Flags.isByVal();
1257 // FIXME: For now, all byval parameter objects are marked mutable. This can be
1258 // changed with more analysis.
1259 // In case of tail call optimization mark all arguments mutable. Since they
1260 // could be overwritten by lowering of arguments in case of a tail call.
1261 int FI = MFI->CreateFixedObject(VA.getValVT().getSizeInBits()/8,
1262 VA.getLocMemOffset(), isImmutable);
1263 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
1264 if (Flags.isByVal())
1266 return DAG.getLoad(VA.getValVT(), Op.getDebugLoc(), Root, FIN,
1267 PseudoSourceValue::getFixedStack(FI), 0);
1271 X86TargetLowering::LowerFORMAL_ARGUMENTS(SDValue Op, SelectionDAG &DAG) {
1272 MachineFunction &MF = DAG.getMachineFunction();
1273 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
1274 DebugLoc dl = Op.getDebugLoc();
1276 const Function* Fn = MF.getFunction();
1277 if (Fn->hasExternalLinkage() &&
1278 Subtarget->isTargetCygMing() &&
1279 Fn->getName() == "main")
1280 FuncInfo->setForceFramePointer(true);
1282 // Decorate the function name.
1283 FuncInfo->setDecorationStyle(NameDecorationForFORMAL_ARGUMENTS(Op));
1285 MachineFrameInfo *MFI = MF.getFrameInfo();
1286 SDValue Root = Op.getOperand(0);
1287 bool isVarArg = cast<ConstantSDNode>(Op.getOperand(2))->getZExtValue() != 0;
1288 unsigned CC = MF.getFunction()->getCallingConv();
1289 bool Is64Bit = Subtarget->is64Bit();
1290 bool IsWin64 = Subtarget->isTargetWin64();
1292 assert(!(isVarArg && CC == CallingConv::Fast) &&
1293 "Var args not supported with calling convention fastcc");
1295 // Assign locations to all of the incoming arguments.
1296 SmallVector<CCValAssign, 16> ArgLocs;
1297 CCState CCInfo(CC, isVarArg, getTargetMachine(), ArgLocs);
1298 CCInfo.AnalyzeFormalArguments(Op.getNode(), CCAssignFnForNode(CC));
1300 SmallVector<SDValue, 8> ArgValues;
1301 unsigned LastVal = ~0U;
1302 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
1303 CCValAssign &VA = ArgLocs[i];
1304 // TODO: If an arg is passed in two places (e.g. reg and stack), skip later
1306 assert(VA.getValNo() != LastVal &&
1307 "Don't support value assigned to multiple locs yet");
1308 LastVal = VA.getValNo();
1310 if (VA.isRegLoc()) {
1311 MVT RegVT = VA.getLocVT();
1312 TargetRegisterClass *RC = NULL;
1313 if (RegVT == MVT::i32)
1314 RC = X86::GR32RegisterClass;
1315 else if (Is64Bit && RegVT == MVT::i64)
1316 RC = X86::GR64RegisterClass;
1317 else if (RegVT == MVT::f32)
1318 RC = X86::FR32RegisterClass;
1319 else if (RegVT == MVT::f64)
1320 RC = X86::FR64RegisterClass;
1321 else if (RegVT.isVector() && RegVT.getSizeInBits() == 128)
1322 RC = X86::VR128RegisterClass;
1323 else if (RegVT.isVector()) {
1324 assert(RegVT.getSizeInBits() == 64);
1326 RC = X86::VR64RegisterClass; // MMX values are passed in MMXs.
1328 // Darwin calling convention passes MMX values in either GPRs or
1329 // XMMs in x86-64. Other targets pass them in memory.
1330 if (RegVT != MVT::v1i64 && Subtarget->hasSSE2()) {
1331 RC = X86::VR128RegisterClass; // MMX values are passed in XMMs.
1334 RC = X86::GR64RegisterClass; // v1i64 values are passed in GPRs.
1339 assert(0 && "Unknown argument type!");
1342 unsigned Reg = AddLiveIn(DAG.getMachineFunction(), VA.getLocReg(), RC);
1343 SDValue ArgValue = DAG.getCopyFromReg(Root, dl, Reg, RegVT);
1345 // If this is an 8 or 16-bit value, it is really passed promoted to 32
1346 // bits. Insert an assert[sz]ext to capture this, then truncate to the
1348 if (VA.getLocInfo() == CCValAssign::SExt)
1349 ArgValue = DAG.getNode(ISD::AssertSext, dl, RegVT, ArgValue,
1350 DAG.getValueType(VA.getValVT()));
1351 else if (VA.getLocInfo() == CCValAssign::ZExt)
1352 ArgValue = DAG.getNode(ISD::AssertZext, dl, RegVT, ArgValue,
1353 DAG.getValueType(VA.getValVT()));
1355 if (VA.getLocInfo() != CCValAssign::Full)
1356 ArgValue = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), ArgValue);
1358 // Handle MMX values passed in GPRs.
1359 if (Is64Bit && RegVT != VA.getLocVT()) {
1360 if (RegVT.getSizeInBits() == 64 && RC == X86::GR64RegisterClass)
1361 ArgValue = DAG.getNode(ISD::BIT_CONVERT, dl, VA.getLocVT(), ArgValue);
1362 else if (RC == X86::VR128RegisterClass) {
1363 ArgValue = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i64,
1364 ArgValue, DAG.getConstant(0, MVT::i64));
1365 ArgValue = DAG.getNode(ISD::BIT_CONVERT, dl, VA.getLocVT(), ArgValue);
1369 ArgValues.push_back(ArgValue);
1371 assert(VA.isMemLoc());
1372 ArgValues.push_back(LowerMemArgument(Op, DAG, VA, MFI, CC, Root, i));
1376 // The x86-64 ABI for returning structs by value requires that we copy
1377 // the sret argument into %rax for the return. Save the argument into
1378 // a virtual register so that we can access it from the return points.
1379 if (Is64Bit && DAG.getMachineFunction().getFunction()->hasStructRetAttr()) {
1380 MachineFunction &MF = DAG.getMachineFunction();
1381 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
1382 unsigned Reg = FuncInfo->getSRetReturnReg();
1384 Reg = MF.getRegInfo().createVirtualRegister(getRegClassFor(MVT::i64));
1385 FuncInfo->setSRetReturnReg(Reg);
1387 SDValue Copy = DAG.getCopyToReg(DAG.getEntryNode(), dl, Reg, ArgValues[0]);
1388 Root = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Copy, Root);
1391 unsigned StackSize = CCInfo.getNextStackOffset();
1392 // align stack specially for tail calls
1393 if (PerformTailCallOpt && CC == CallingConv::Fast)
1394 StackSize = GetAlignedArgumentStackSize(StackSize, DAG);
1396 // If the function takes variable number of arguments, make a frame index for
1397 // the start of the first vararg value... for expansion of llvm.va_start.
1399 if (Is64Bit || CC != CallingConv::X86_FastCall) {
1400 VarArgsFrameIndex = MFI->CreateFixedObject(1, StackSize);
1403 unsigned TotalNumIntRegs = 0, TotalNumXMMRegs = 0;
1405 // FIXME: We should really autogenerate these arrays
1406 static const unsigned GPR64ArgRegsWin64[] = {
1407 X86::RCX, X86::RDX, X86::R8, X86::R9
1409 static const unsigned XMMArgRegsWin64[] = {
1410 X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3
1412 static const unsigned GPR64ArgRegs64Bit[] = {
1413 X86::RDI, X86::RSI, X86::RDX, X86::RCX, X86::R8, X86::R9
1415 static const unsigned XMMArgRegs64Bit[] = {
1416 X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3,
1417 X86::XMM4, X86::XMM5, X86::XMM6, X86::XMM7
1419 const unsigned *GPR64ArgRegs, *XMMArgRegs;
1422 TotalNumIntRegs = 4; TotalNumXMMRegs = 4;
1423 GPR64ArgRegs = GPR64ArgRegsWin64;
1424 XMMArgRegs = XMMArgRegsWin64;
1426 TotalNumIntRegs = 6; TotalNumXMMRegs = 8;
1427 GPR64ArgRegs = GPR64ArgRegs64Bit;
1428 XMMArgRegs = XMMArgRegs64Bit;
1430 unsigned NumIntRegs = CCInfo.getFirstUnallocated(GPR64ArgRegs,
1432 unsigned NumXMMRegs = CCInfo.getFirstUnallocated(XMMArgRegs,
1435 assert(!(NumXMMRegs && !Subtarget->hasSSE1()) &&
1436 "SSE register cannot be used when SSE is disabled!");
1437 assert(!(NumXMMRegs && UseSoftFloat) &&
1438 "SSE register cannot be used when SSE is disabled!");
1439 if (UseSoftFloat || !Subtarget->hasSSE1()) {
1440 // Kernel mode asks for SSE to be disabled, so don't push them
1442 TotalNumXMMRegs = 0;
1444 // For X86-64, if there are vararg parameters that are passed via
1445 // registers, then we must store them to their spots on the stack so they
1446 // may be loaded by deferencing the result of va_next.
1447 VarArgsGPOffset = NumIntRegs * 8;
1448 VarArgsFPOffset = TotalNumIntRegs * 8 + NumXMMRegs * 16;
1449 RegSaveFrameIndex = MFI->CreateStackObject(TotalNumIntRegs * 8 +
1450 TotalNumXMMRegs * 16, 16);
1452 // Store the integer parameter registers.
1453 SmallVector<SDValue, 8> MemOps;
1454 SDValue RSFIN = DAG.getFrameIndex(RegSaveFrameIndex, getPointerTy());
1455 SDValue FIN = DAG.getNode(ISD::ADD, dl, getPointerTy(), RSFIN,
1456 DAG.getIntPtrConstant(VarArgsGPOffset));
1457 for (; NumIntRegs != TotalNumIntRegs; ++NumIntRegs) {
1458 unsigned VReg = AddLiveIn(MF, GPR64ArgRegs[NumIntRegs],
1459 X86::GR64RegisterClass);
1460 SDValue Val = DAG.getCopyFromReg(Root, dl, VReg, MVT::i64);
1462 DAG.getStore(Val.getValue(1), dl, Val, FIN,
1463 PseudoSourceValue::getFixedStack(RegSaveFrameIndex), 0);
1464 MemOps.push_back(Store);
1465 FIN = DAG.getNode(ISD::ADD, dl, getPointerTy(), FIN,
1466 DAG.getIntPtrConstant(8));
1469 // Now store the XMM (fp + vector) parameter registers.
1470 FIN = DAG.getNode(ISD::ADD, dl, getPointerTy(), RSFIN,
1471 DAG.getIntPtrConstant(VarArgsFPOffset));
1472 for (; NumXMMRegs != TotalNumXMMRegs; ++NumXMMRegs) {
1473 unsigned VReg = AddLiveIn(MF, XMMArgRegs[NumXMMRegs],
1474 X86::VR128RegisterClass);
1475 SDValue Val = DAG.getCopyFromReg(Root, dl, VReg, MVT::v4f32);
1477 DAG.getStore(Val.getValue(1), dl, Val, FIN,
1478 PseudoSourceValue::getFixedStack(RegSaveFrameIndex), 0);
1479 MemOps.push_back(Store);
1480 FIN = DAG.getNode(ISD::ADD, dl, getPointerTy(), FIN,
1481 DAG.getIntPtrConstant(16));
1483 if (!MemOps.empty())
1484 Root = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
1485 &MemOps[0], MemOps.size());
1489 ArgValues.push_back(Root);
1491 // Some CCs need callee pop.
1492 if (IsCalleePop(isVarArg, CC)) {
1493 BytesToPopOnReturn = StackSize; // Callee pops everything.
1494 BytesCallerReserves = 0;
1496 BytesToPopOnReturn = 0; // Callee pops nothing.
1497 // If this is an sret function, the return should pop the hidden pointer.
1498 if (!Is64Bit && CC != CallingConv::Fast && ArgsAreStructReturn(Op))
1499 BytesToPopOnReturn = 4;
1500 BytesCallerReserves = StackSize;
1504 RegSaveFrameIndex = 0xAAAAAAA; // RegSaveFrameIndex is X86-64 only.
1505 if (CC == CallingConv::X86_FastCall)
1506 VarArgsFrameIndex = 0xAAAAAAA; // fastcc functions can't have varargs.
1509 FuncInfo->setBytesToPopOnReturn(BytesToPopOnReturn);
1511 // Return the new list of results.
1512 return DAG.getNode(ISD::MERGE_VALUES, dl, Op.getNode()->getVTList(),
1513 &ArgValues[0], ArgValues.size()).getValue(Op.getResNo());
1517 X86TargetLowering::LowerMemOpCallTo(CallSDNode *TheCall, SelectionDAG &DAG,
1518 const SDValue &StackPtr,
1519 const CCValAssign &VA,
1521 SDValue Arg, ISD::ArgFlagsTy Flags) {
1522 DebugLoc dl = TheCall->getDebugLoc();
1523 unsigned LocMemOffset = VA.getLocMemOffset();
1524 SDValue PtrOff = DAG.getIntPtrConstant(LocMemOffset);
1525 PtrOff = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr, PtrOff);
1526 if (Flags.isByVal()) {
1527 return CreateCopyOfByValArgument(Arg, PtrOff, Chain, Flags, DAG, dl);
1529 return DAG.getStore(Chain, dl, Arg, PtrOff,
1530 PseudoSourceValue::getStack(), LocMemOffset);
1533 /// EmitTailCallLoadRetAddr - Emit a load of return address if tail call
1534 /// optimization is performed and it is required.
1536 X86TargetLowering::EmitTailCallLoadRetAddr(SelectionDAG &DAG,
1537 SDValue &OutRetAddr,
1543 if (!IsTailCall || FPDiff==0) return Chain;
1545 // Adjust the Return address stack slot.
1546 MVT VT = getPointerTy();
1547 OutRetAddr = getReturnAddressFrameIndex(DAG);
1549 // Load the "old" Return address.
1550 OutRetAddr = DAG.getLoad(VT, dl, Chain, OutRetAddr, NULL, 0);
1551 return SDValue(OutRetAddr.getNode(), 1);
1554 /// EmitTailCallStoreRetAddr - Emit a store of the return adress if tail call
1555 /// optimization is performed and it is required (FPDiff!=0).
1557 EmitTailCallStoreRetAddr(SelectionDAG & DAG, MachineFunction &MF,
1558 SDValue Chain, SDValue RetAddrFrIdx,
1559 bool Is64Bit, int FPDiff, DebugLoc dl) {
1560 // Store the return address to the appropriate stack slot.
1561 if (!FPDiff) return Chain;
1562 // Calculate the new stack slot for the return address.
1563 int SlotSize = Is64Bit ? 8 : 4;
1564 int NewReturnAddrFI =
1565 MF.getFrameInfo()->CreateFixedObject(SlotSize, FPDiff-SlotSize);
1566 MVT VT = Is64Bit ? MVT::i64 : MVT::i32;
1567 SDValue NewRetAddrFrIdx = DAG.getFrameIndex(NewReturnAddrFI, VT);
1568 Chain = DAG.getStore(Chain, dl, RetAddrFrIdx, NewRetAddrFrIdx,
1569 PseudoSourceValue::getFixedStack(NewReturnAddrFI), 0);
1573 SDValue X86TargetLowering::LowerCALL(SDValue Op, SelectionDAG &DAG) {
1574 MachineFunction &MF = DAG.getMachineFunction();
1575 CallSDNode *TheCall = cast<CallSDNode>(Op.getNode());
1576 SDValue Chain = TheCall->getChain();
1577 unsigned CC = TheCall->getCallingConv();
1578 bool isVarArg = TheCall->isVarArg();
1579 bool IsTailCall = TheCall->isTailCall() &&
1580 CC == CallingConv::Fast && PerformTailCallOpt;
1581 SDValue Callee = TheCall->getCallee();
1582 bool Is64Bit = Subtarget->is64Bit();
1583 bool IsStructRet = CallIsStructReturn(TheCall);
1584 DebugLoc dl = TheCall->getDebugLoc();
1586 assert(!(isVarArg && CC == CallingConv::Fast) &&
1587 "Var args not supported with calling convention fastcc");
1589 // Analyze operands of the call, assigning locations to each operand.
1590 SmallVector<CCValAssign, 16> ArgLocs;
1591 CCState CCInfo(CC, isVarArg, getTargetMachine(), ArgLocs);
1592 CCInfo.AnalyzeCallOperands(TheCall, CCAssignFnForNode(CC));
1594 // Get a count of how many bytes are to be pushed on the stack.
1595 unsigned NumBytes = CCInfo.getNextStackOffset();
1596 if (PerformTailCallOpt && CC == CallingConv::Fast)
1597 NumBytes = GetAlignedArgumentStackSize(NumBytes, DAG);
1601 // Lower arguments at fp - stackoffset + fpdiff.
1602 unsigned NumBytesCallerPushed =
1603 MF.getInfo<X86MachineFunctionInfo>()->getBytesToPopOnReturn();
1604 FPDiff = NumBytesCallerPushed - NumBytes;
1606 // Set the delta of movement of the returnaddr stackslot.
1607 // But only set if delta is greater than previous delta.
1608 if (FPDiff < (MF.getInfo<X86MachineFunctionInfo>()->getTCReturnAddrDelta()))
1609 MF.getInfo<X86MachineFunctionInfo>()->setTCReturnAddrDelta(FPDiff);
1612 Chain = DAG.getCALLSEQ_START(Chain, DAG.getIntPtrConstant(NumBytes, true));
1614 SDValue RetAddrFrIdx;
1615 // Load return adress for tail calls.
1616 Chain = EmitTailCallLoadRetAddr(DAG, RetAddrFrIdx, Chain, IsTailCall, Is64Bit,
1619 SmallVector<std::pair<unsigned, SDValue>, 8> RegsToPass;
1620 SmallVector<SDValue, 8> MemOpChains;
1623 // Walk the register/memloc assignments, inserting copies/loads. In the case
1624 // of tail call optimization arguments are handle later.
1625 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
1626 CCValAssign &VA = ArgLocs[i];
1627 SDValue Arg = TheCall->getArg(i);
1628 ISD::ArgFlagsTy Flags = TheCall->getArgFlags(i);
1629 bool isByVal = Flags.isByVal();
1631 // Promote the value if needed.
1632 switch (VA.getLocInfo()) {
1633 default: assert(0 && "Unknown loc info!");
1634 case CCValAssign::Full: break;
1635 case CCValAssign::SExt:
1636 Arg = DAG.getNode(ISD::SIGN_EXTEND, dl, VA.getLocVT(), Arg);
1638 case CCValAssign::ZExt:
1639 Arg = DAG.getNode(ISD::ZERO_EXTEND, dl, VA.getLocVT(), Arg);
1641 case CCValAssign::AExt:
1642 Arg = DAG.getNode(ISD::ANY_EXTEND, dl, VA.getLocVT(), Arg);
1646 if (VA.isRegLoc()) {
1648 MVT RegVT = VA.getLocVT();
1649 if (RegVT.isVector() && RegVT.getSizeInBits() == 64)
1650 switch (VA.getLocReg()) {
1653 case X86::RDI: case X86::RSI: case X86::RDX: case X86::RCX:
1655 // Special case: passing MMX values in GPR registers.
1656 Arg = DAG.getNode(ISD::BIT_CONVERT, dl, MVT::i64, Arg);
1659 case X86::XMM0: case X86::XMM1: case X86::XMM2: case X86::XMM3:
1660 case X86::XMM4: case X86::XMM5: case X86::XMM6: case X86::XMM7: {
1661 // Special case: passing MMX values in XMM registers.
1662 Arg = DAG.getNode(ISD::BIT_CONVERT, dl, MVT::i64, Arg);
1663 Arg = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2i64, Arg);
1664 Arg = DAG.getNode(ISD::VECTOR_SHUFFLE, dl, MVT::v2i64,
1665 DAG.getUNDEF(MVT::v2i64), Arg,
1666 getMOVLMask(2, DAG, dl));
1671 RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
1673 if (!IsTailCall || (IsTailCall && isByVal)) {
1674 assert(VA.isMemLoc());
1675 if (StackPtr.getNode() == 0)
1676 StackPtr = DAG.getCopyFromReg(Chain, dl, X86StackPtr, getPointerTy());
1678 MemOpChains.push_back(LowerMemOpCallTo(TheCall, DAG, StackPtr, VA,
1679 Chain, Arg, Flags));
1684 if (!MemOpChains.empty())
1685 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
1686 &MemOpChains[0], MemOpChains.size());
1688 // Build a sequence of copy-to-reg nodes chained together with token chain
1689 // and flag operands which copy the outgoing args into registers.
1691 // Tail call byval lowering might overwrite argument registers so in case of
1692 // tail call optimization the copies to registers are lowered later.
1694 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
1695 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
1696 RegsToPass[i].second, InFlag);
1697 InFlag = Chain.getValue(1);
1700 // ELF / PIC requires GOT in the EBX register before function calls via PLT
1702 if (CallRequiresGOTPtrInReg(Is64Bit, IsTailCall)) {
1703 Chain = DAG.getCopyToReg(Chain, dl, X86::EBX,
1704 DAG.getNode(X86ISD::GlobalBaseReg,
1705 DebugLoc::getUnknownLoc(),
1708 InFlag = Chain.getValue(1);
1710 // If we are tail calling and generating PIC/GOT style code load the address
1711 // of the callee into ecx. The value in ecx is used as target of the tail
1712 // jump. This is done to circumvent the ebx/callee-saved problem for tail
1713 // calls on PIC/GOT architectures. Normally we would just put the address of
1714 // GOT into ebx and then call target@PLT. But for tail callss ebx would be
1715 // restored (since ebx is callee saved) before jumping to the target@PLT.
1716 if (CallRequiresFnAddressInReg(Is64Bit, IsTailCall)) {
1717 // Note: The actual moving to ecx is done further down.
1718 GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee);
1719 if (G && !G->getGlobal()->hasHiddenVisibility() &&
1720 !G->getGlobal()->hasProtectedVisibility())
1721 Callee = LowerGlobalAddress(Callee, DAG);
1722 else if (isa<ExternalSymbolSDNode>(Callee))
1723 Callee = LowerExternalSymbol(Callee,DAG);
1726 if (Is64Bit && isVarArg) {
1727 // From AMD64 ABI document:
1728 // For calls that may call functions that use varargs or stdargs
1729 // (prototype-less calls or calls to functions containing ellipsis (...) in
1730 // the declaration) %al is used as hidden argument to specify the number
1731 // of SSE registers used. The contents of %al do not need to match exactly
1732 // the number of registers, but must be an ubound on the number of SSE
1733 // registers used and is in the range 0 - 8 inclusive.
1735 // FIXME: Verify this on Win64
1736 // Count the number of XMM registers allocated.
1737 static const unsigned XMMArgRegs[] = {
1738 X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3,
1739 X86::XMM4, X86::XMM5, X86::XMM6, X86::XMM7
1741 unsigned NumXMMRegs = CCInfo.getFirstUnallocated(XMMArgRegs, 8);
1742 assert((Subtarget->hasSSE1() || !NumXMMRegs)
1743 && "SSE registers cannot be used when SSE is disabled");
1745 Chain = DAG.getCopyToReg(Chain, dl, X86::AL,
1746 DAG.getConstant(NumXMMRegs, MVT::i8), InFlag);
1747 InFlag = Chain.getValue(1);
1751 // For tail calls lower the arguments to the 'real' stack slot.
1753 SmallVector<SDValue, 8> MemOpChains2;
1756 // Do not flag preceeding copytoreg stuff together with the following stuff.
1758 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
1759 CCValAssign &VA = ArgLocs[i];
1760 if (!VA.isRegLoc()) {
1761 assert(VA.isMemLoc());
1762 SDValue Arg = TheCall->getArg(i);
1763 ISD::ArgFlagsTy Flags = TheCall->getArgFlags(i);
1764 // Create frame index.
1765 int32_t Offset = VA.getLocMemOffset()+FPDiff;
1766 uint32_t OpSize = (VA.getLocVT().getSizeInBits()+7)/8;
1767 FI = MF.getFrameInfo()->CreateFixedObject(OpSize, Offset);
1768 FIN = DAG.getFrameIndex(FI, getPointerTy());
1770 if (Flags.isByVal()) {
1771 // Copy relative to framepointer.
1772 SDValue Source = DAG.getIntPtrConstant(VA.getLocMemOffset());
1773 if (StackPtr.getNode() == 0)
1774 StackPtr = DAG.getCopyFromReg(Chain, dl, X86StackPtr,
1776 Source = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr, Source);
1778 MemOpChains2.push_back(CreateCopyOfByValArgument(Source, FIN, Chain,
1781 // Store relative to framepointer.
1782 MemOpChains2.push_back(
1783 DAG.getStore(Chain, dl, Arg, FIN,
1784 PseudoSourceValue::getFixedStack(FI), 0));
1789 if (!MemOpChains2.empty())
1790 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
1791 &MemOpChains2[0], MemOpChains2.size());
1793 // Copy arguments to their registers.
1794 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
1795 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
1796 RegsToPass[i].second, InFlag);
1797 InFlag = Chain.getValue(1);
1801 // Store the return address to the appropriate stack slot.
1802 Chain = EmitTailCallStoreRetAddr(DAG, MF, Chain, RetAddrFrIdx, Is64Bit,
1806 // If the callee is a GlobalAddress node (quite common, every direct call is)
1807 // turn it into a TargetGlobalAddress node so that legalize doesn't hack it.
1808 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
1809 // We should use extra load for direct calls to dllimported functions in
1811 if (!Subtarget->GVRequiresExtraLoad(G->getGlobal(),
1812 getTargetMachine(), true))
1813 Callee = DAG.getTargetGlobalAddress(G->getGlobal(), getPointerTy(),
1815 } else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) {
1816 Callee = DAG.getTargetExternalSymbol(S->getSymbol(), getPointerTy());
1817 } else if (IsTailCall) {
1818 unsigned Opc = Is64Bit ? X86::R9 : X86::EAX;
1820 Chain = DAG.getCopyToReg(Chain, dl,
1821 DAG.getRegister(Opc, getPointerTy()),
1823 Callee = DAG.getRegister(Opc, getPointerTy());
1824 // Add register as live out.
1825 DAG.getMachineFunction().getRegInfo().addLiveOut(Opc);
1828 // Returns a chain & a flag for retval copy to use.
1829 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Flag);
1830 SmallVector<SDValue, 8> Ops;
1833 Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(NumBytes, true),
1834 DAG.getIntPtrConstant(0, true), InFlag);
1835 InFlag = Chain.getValue(1);
1837 // Returns a chain & a flag for retval copy to use.
1838 NodeTys = DAG.getVTList(MVT::Other, MVT::Flag);
1842 Ops.push_back(Chain);
1843 Ops.push_back(Callee);
1846 Ops.push_back(DAG.getConstant(FPDiff, MVT::i32));
1848 // Add argument registers to the end of the list so that they are known live
1850 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
1851 Ops.push_back(DAG.getRegister(RegsToPass[i].first,
1852 RegsToPass[i].second.getValueType()));
1854 // Add an implicit use GOT pointer in EBX.
1855 if (!IsTailCall && !Is64Bit &&
1856 getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
1857 Subtarget->isPICStyleGOT())
1858 Ops.push_back(DAG.getRegister(X86::EBX, getPointerTy()));
1860 // Add an implicit use of AL for x86 vararg functions.
1861 if (Is64Bit && isVarArg)
1862 Ops.push_back(DAG.getRegister(X86::AL, MVT::i8));
1864 if (InFlag.getNode())
1865 Ops.push_back(InFlag);
1868 assert(InFlag.getNode() &&
1869 "Flag must be set. Depend on flag being set in LowerRET");
1870 Chain = DAG.getNode(X86ISD::TAILCALL, dl,
1871 TheCall->getVTList(), &Ops[0], Ops.size());
1873 return SDValue(Chain.getNode(), Op.getResNo());
1876 Chain = DAG.getNode(X86ISD::CALL, dl, NodeTys, &Ops[0], Ops.size());
1877 InFlag = Chain.getValue(1);
1879 // Create the CALLSEQ_END node.
1880 unsigned NumBytesForCalleeToPush;
1881 if (IsCalleePop(isVarArg, CC))
1882 NumBytesForCalleeToPush = NumBytes; // Callee pops everything
1883 else if (!Is64Bit && CC != CallingConv::Fast && IsStructRet)
1884 // If this is is a call to a struct-return function, the callee
1885 // pops the hidden struct pointer, so we have to push it back.
1886 // This is common for Darwin/X86, Linux & Mingw32 targets.
1887 NumBytesForCalleeToPush = 4;
1889 NumBytesForCalleeToPush = 0; // Callee pops nothing.
1891 // Returns a flag for retval copy to use.
1892 Chain = DAG.getCALLSEQ_END(Chain,
1893 DAG.getIntPtrConstant(NumBytes, true),
1894 DAG.getIntPtrConstant(NumBytesForCalleeToPush,
1897 InFlag = Chain.getValue(1);
1899 // Handle result values, copying them out of physregs into vregs that we
1901 return SDValue(LowerCallResult(Chain, InFlag, TheCall, CC, DAG),
1906 //===----------------------------------------------------------------------===//
1907 // Fast Calling Convention (tail call) implementation
1908 //===----------------------------------------------------------------------===//
1910 // Like std call, callee cleans arguments, convention except that ECX is
1911 // reserved for storing the tail called function address. Only 2 registers are
1912 // free for argument passing (inreg). Tail call optimization is performed
1914 // * tailcallopt is enabled
1915 // * caller/callee are fastcc
1916 // On X86_64 architecture with GOT-style position independent code only local
1917 // (within module) calls are supported at the moment.
1918 // To keep the stack aligned according to platform abi the function
1919 // GetAlignedArgumentStackSize ensures that argument delta is always multiples
1920 // of stack alignment. (Dynamic linkers need this - darwin's dyld for example)
1921 // If a tail called function callee has more arguments than the caller the
1922 // caller needs to make sure that there is room to move the RETADDR to. This is
1923 // achieved by reserving an area the size of the argument delta right after the
1924 // original REtADDR, but before the saved framepointer or the spilled registers
1925 // e.g. caller(arg1, arg2) calls callee(arg1, arg2,arg3,arg4)
1937 /// GetAlignedArgumentStackSize - Make the stack size align e.g 16n + 12 aligned
1938 /// for a 16 byte align requirement.
1939 unsigned X86TargetLowering::GetAlignedArgumentStackSize(unsigned StackSize,
1940 SelectionDAG& DAG) {
1941 MachineFunction &MF = DAG.getMachineFunction();
1942 const TargetMachine &TM = MF.getTarget();
1943 const TargetFrameInfo &TFI = *TM.getFrameInfo();
1944 unsigned StackAlignment = TFI.getStackAlignment();
1945 uint64_t AlignMask = StackAlignment - 1;
1946 int64_t Offset = StackSize;
1947 uint64_t SlotSize = TD->getPointerSize();
1948 if ( (Offset & AlignMask) <= (StackAlignment - SlotSize) ) {
1949 // Number smaller than 12 so just add the difference.
1950 Offset += ((StackAlignment - SlotSize) - (Offset & AlignMask));
1952 // Mask out lower bits, add stackalignment once plus the 12 bytes.
1953 Offset = ((~AlignMask) & Offset) + StackAlignment +
1954 (StackAlignment-SlotSize);
1959 /// IsEligibleForTailCallElimination - Check to see whether the next instruction
1960 /// following the call is a return. A function is eligible if caller/callee
1961 /// calling conventions match, currently only fastcc supports tail calls, and
1962 /// the function CALL is immediatly followed by a RET.
1963 bool X86TargetLowering::IsEligibleForTailCallOptimization(CallSDNode *TheCall,
1965 SelectionDAG& DAG) const {
1966 if (!PerformTailCallOpt)
1969 if (CheckTailCallReturnConstraints(TheCall, Ret)) {
1970 MachineFunction &MF = DAG.getMachineFunction();
1971 unsigned CallerCC = MF.getFunction()->getCallingConv();
1972 unsigned CalleeCC= TheCall->getCallingConv();
1973 if (CalleeCC == CallingConv::Fast && CallerCC == CalleeCC) {
1974 SDValue Callee = TheCall->getCallee();
1975 // On x86/32Bit PIC/GOT tail calls are supported.
1976 if (getTargetMachine().getRelocationModel() != Reloc::PIC_ ||
1977 !Subtarget->isPICStyleGOT()|| !Subtarget->is64Bit())
1980 // Can only do local tail calls (in same module, hidden or protected) on
1981 // x86_64 PIC/GOT at the moment.
1982 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee))
1983 return G->getGlobal()->hasHiddenVisibility()
1984 || G->getGlobal()->hasProtectedVisibility();
1992 X86TargetLowering::createFastISel(MachineFunction &mf,
1993 MachineModuleInfo *mmo,
1995 DenseMap<const Value *, unsigned> &vm,
1996 DenseMap<const BasicBlock *,
1997 MachineBasicBlock *> &bm,
1998 DenseMap<const AllocaInst *, int> &am
2000 , SmallSet<Instruction*, 8> &cil
2003 return X86::createFastISel(mf, mmo, dw, vm, bm, am
2011 //===----------------------------------------------------------------------===//
2012 // Other Lowering Hooks
2013 //===----------------------------------------------------------------------===//
2016 SDValue X86TargetLowering::getReturnAddressFrameIndex(SelectionDAG &DAG) {
2017 MachineFunction &MF = DAG.getMachineFunction();
2018 X86MachineFunctionInfo *FuncInfo = MF.getInfo<X86MachineFunctionInfo>();
2019 int ReturnAddrIndex = FuncInfo->getRAIndex();
2021 if (ReturnAddrIndex == 0) {
2022 // Set up a frame object for the return address.
2023 uint64_t SlotSize = TD->getPointerSize();
2024 ReturnAddrIndex = MF.getFrameInfo()->CreateFixedObject(SlotSize, -SlotSize);
2025 FuncInfo->setRAIndex(ReturnAddrIndex);
2028 return DAG.getFrameIndex(ReturnAddrIndex, getPointerTy());
2032 /// TranslateX86CC - do a one to one translation of a ISD::CondCode to the X86
2033 /// specific condition code, returning the condition code and the LHS/RHS of the
2034 /// comparison to make.
2035 static unsigned TranslateX86CC(ISD::CondCode SetCCOpcode, bool isFP,
2036 SDValue &LHS, SDValue &RHS, SelectionDAG &DAG) {
2038 if (ConstantSDNode *RHSC = dyn_cast<ConstantSDNode>(RHS)) {
2039 if (SetCCOpcode == ISD::SETGT && RHSC->isAllOnesValue()) {
2040 // X > -1 -> X == 0, jump !sign.
2041 RHS = DAG.getConstant(0, RHS.getValueType());
2042 return X86::COND_NS;
2043 } else if (SetCCOpcode == ISD::SETLT && RHSC->isNullValue()) {
2044 // X < 0 -> X == 0, jump on sign.
2046 } else if (SetCCOpcode == ISD::SETLT && RHSC->getZExtValue() == 1) {
2048 RHS = DAG.getConstant(0, RHS.getValueType());
2049 return X86::COND_LE;
2053 switch (SetCCOpcode) {
2054 default: assert(0 && "Invalid integer condition!");
2055 case ISD::SETEQ: return X86::COND_E;
2056 case ISD::SETGT: return X86::COND_G;
2057 case ISD::SETGE: return X86::COND_GE;
2058 case ISD::SETLT: return X86::COND_L;
2059 case ISD::SETLE: return X86::COND_LE;
2060 case ISD::SETNE: return X86::COND_NE;
2061 case ISD::SETULT: return X86::COND_B;
2062 case ISD::SETUGT: return X86::COND_A;
2063 case ISD::SETULE: return X86::COND_BE;
2064 case ISD::SETUGE: return X86::COND_AE;
2068 // First determine if it is required or is profitable to flip the operands.
2070 // If LHS is a foldable load, but RHS is not, flip the condition.
2071 if ((ISD::isNON_EXTLoad(LHS.getNode()) && LHS.hasOneUse()) &&
2072 !(ISD::isNON_EXTLoad(RHS.getNode()) && RHS.hasOneUse())) {
2073 SetCCOpcode = getSetCCSwappedOperands(SetCCOpcode);
2074 std::swap(LHS, RHS);
2077 switch (SetCCOpcode) {
2083 std::swap(LHS, RHS);
2087 // On a floating point condition, the flags are set as follows:
2089 // 0 | 0 | 0 | X > Y
2090 // 0 | 0 | 1 | X < Y
2091 // 1 | 0 | 0 | X == Y
2092 // 1 | 1 | 1 | unordered
2093 switch (SetCCOpcode) {
2094 default: assert(0 && "Condcode should be pre-legalized away");
2096 case ISD::SETEQ: return X86::COND_E;
2097 case ISD::SETOLT: // flipped
2099 case ISD::SETGT: return X86::COND_A;
2100 case ISD::SETOLE: // flipped
2102 case ISD::SETGE: return X86::COND_AE;
2103 case ISD::SETUGT: // flipped
2105 case ISD::SETLT: return X86::COND_B;
2106 case ISD::SETUGE: // flipped
2108 case ISD::SETLE: return X86::COND_BE;
2110 case ISD::SETNE: return X86::COND_NE;
2111 case ISD::SETUO: return X86::COND_P;
2112 case ISD::SETO: return X86::COND_NP;
2116 /// hasFPCMov - is there a floating point cmov for the specific X86 condition
2117 /// code. Current x86 isa includes the following FP cmov instructions:
2118 /// fcmovb, fcomvbe, fcomve, fcmovu, fcmovae, fcmova, fcmovne, fcmovnu.
2119 static bool hasFPCMov(unsigned X86CC) {
2135 /// isUndefOrInRange - Op is either an undef node or a ConstantSDNode. Return
2136 /// true if Op is undef or if its value falls within the specified range (L, H].
2137 static bool isUndefOrInRange(SDValue Op, unsigned Low, unsigned Hi) {
2138 if (Op.getOpcode() == ISD::UNDEF)
2141 unsigned Val = cast<ConstantSDNode>(Op)->getZExtValue();
2142 return (Val >= Low && Val < Hi);
2145 /// isUndefOrEqual - Op is either an undef node or a ConstantSDNode. Return
2146 /// true if Op is undef or if its value equal to the specified value.
2147 static bool isUndefOrEqual(SDValue Op, unsigned Val) {
2148 if (Op.getOpcode() == ISD::UNDEF)
2150 return cast<ConstantSDNode>(Op)->getZExtValue() == Val;
2153 /// isPSHUFDMask - Return true if the specified VECTOR_SHUFFLE operand
2154 /// specifies a shuffle of elements that is suitable for input to PSHUFD.
2155 bool X86::isPSHUFDMask(SDNode *N) {
2156 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2158 if (N->getNumOperands() != 2 && N->getNumOperands() != 4)
2161 // Check if the value doesn't reference the second vector.
2162 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
2163 SDValue Arg = N->getOperand(i);
2164 if (Arg.getOpcode() == ISD::UNDEF) continue;
2165 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
2166 if (cast<ConstantSDNode>(Arg)->getZExtValue() >= e)
2173 /// isPSHUFHWMask - Return true if the specified VECTOR_SHUFFLE operand
2174 /// specifies a shuffle of elements that is suitable for input to PSHUFHW.
2175 bool X86::isPSHUFHWMask(SDNode *N) {
2176 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2178 if (N->getNumOperands() != 8)
2181 // Lower quadword copied in order.
2182 for (unsigned i = 0; i != 4; ++i) {
2183 SDValue Arg = N->getOperand(i);
2184 if (Arg.getOpcode() == ISD::UNDEF) continue;
2185 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
2186 if (cast<ConstantSDNode>(Arg)->getZExtValue() != i)
2190 // Upper quadword shuffled.
2191 for (unsigned i = 4; i != 8; ++i) {
2192 SDValue Arg = N->getOperand(i);
2193 if (Arg.getOpcode() == ISD::UNDEF) continue;
2194 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
2195 unsigned Val = cast<ConstantSDNode>(Arg)->getZExtValue();
2196 if (Val < 4 || Val > 7)
2203 /// isPSHUFLWMask - Return true if the specified VECTOR_SHUFFLE operand
2204 /// specifies a shuffle of elements that is suitable for input to PSHUFLW.
2205 bool X86::isPSHUFLWMask(SDNode *N) {
2206 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2208 if (N->getNumOperands() != 8)
2211 // Upper quadword copied in order.
2212 for (unsigned i = 4; i != 8; ++i)
2213 if (!isUndefOrEqual(N->getOperand(i), i))
2216 // Lower quadword shuffled.
2217 for (unsigned i = 0; i != 4; ++i)
2218 if (!isUndefOrInRange(N->getOperand(i), 0, 4))
2224 /// isSHUFPMask - Return true if the specified VECTOR_SHUFFLE operand
2225 /// specifies a shuffle of elements that is suitable for input to SHUFP*.
2226 template<class SDOperand>
2227 static bool isSHUFPMask(SDOperand *Elems, unsigned NumElems) {
2228 if (NumElems != 2 && NumElems != 4) return false;
2230 unsigned Half = NumElems / 2;
2231 for (unsigned i = 0; i < Half; ++i)
2232 if (!isUndefOrInRange(Elems[i], 0, NumElems))
2234 for (unsigned i = Half; i < NumElems; ++i)
2235 if (!isUndefOrInRange(Elems[i], NumElems, NumElems*2))
2241 bool X86::isSHUFPMask(SDNode *N) {
2242 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2243 return ::isSHUFPMask(N->op_begin(), N->getNumOperands());
2246 /// isCommutedSHUFP - Returns true if the shuffle mask is exactly
2247 /// the reverse of what x86 shuffles want. x86 shuffles requires the lower
2248 /// half elements to come from vector 1 (which would equal the dest.) and
2249 /// the upper half to come from vector 2.
2250 template<class SDOperand>
2251 static bool isCommutedSHUFP(SDOperand *Ops, unsigned NumOps) {
2252 if (NumOps != 2 && NumOps != 4) return false;
2254 unsigned Half = NumOps / 2;
2255 for (unsigned i = 0; i < Half; ++i)
2256 if (!isUndefOrInRange(Ops[i], NumOps, NumOps*2))
2258 for (unsigned i = Half; i < NumOps; ++i)
2259 if (!isUndefOrInRange(Ops[i], 0, NumOps))
2264 static bool isCommutedSHUFP(SDNode *N) {
2265 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2266 return isCommutedSHUFP(N->op_begin(), N->getNumOperands());
2269 /// isMOVHLPSMask - Return true if the specified VECTOR_SHUFFLE operand
2270 /// specifies a shuffle of elements that is suitable for input to MOVHLPS.
2271 bool X86::isMOVHLPSMask(SDNode *N) {
2272 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2274 if (N->getNumOperands() != 4)
2277 // Expect bit0 == 6, bit1 == 7, bit2 == 2, bit3 == 3
2278 return isUndefOrEqual(N->getOperand(0), 6) &&
2279 isUndefOrEqual(N->getOperand(1), 7) &&
2280 isUndefOrEqual(N->getOperand(2), 2) &&
2281 isUndefOrEqual(N->getOperand(3), 3);
2284 /// isMOVHLPS_v_undef_Mask - Special case of isMOVHLPSMask for canonical form
2285 /// of vector_shuffle v, v, <2, 3, 2, 3>, i.e. vector_shuffle v, undef,
2287 bool X86::isMOVHLPS_v_undef_Mask(SDNode *N) {
2288 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2290 if (N->getNumOperands() != 4)
2293 // Expect bit0 == 2, bit1 == 3, bit2 == 2, bit3 == 3
2294 return isUndefOrEqual(N->getOperand(0), 2) &&
2295 isUndefOrEqual(N->getOperand(1), 3) &&
2296 isUndefOrEqual(N->getOperand(2), 2) &&
2297 isUndefOrEqual(N->getOperand(3), 3);
2300 /// isMOVLPMask - Return true if the specified VECTOR_SHUFFLE operand
2301 /// specifies a shuffle of elements that is suitable for input to MOVLP{S|D}.
2302 bool X86::isMOVLPMask(SDNode *N) {
2303 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2305 unsigned NumElems = N->getNumOperands();
2306 if (NumElems != 2 && NumElems != 4)
2309 for (unsigned i = 0; i < NumElems/2; ++i)
2310 if (!isUndefOrEqual(N->getOperand(i), i + NumElems))
2313 for (unsigned i = NumElems/2; i < NumElems; ++i)
2314 if (!isUndefOrEqual(N->getOperand(i), i))
2320 /// isMOVHPMask - Return true if the specified VECTOR_SHUFFLE operand
2321 /// specifies a shuffle of elements that is suitable for input to MOVHP{S|D}
2323 bool X86::isMOVHPMask(SDNode *N) {
2324 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2326 unsigned NumElems = N->getNumOperands();
2327 if (NumElems != 2 && NumElems != 4)
2330 for (unsigned i = 0; i < NumElems/2; ++i)
2331 if (!isUndefOrEqual(N->getOperand(i), i))
2334 for (unsigned i = 0; i < NumElems/2; ++i) {
2335 SDValue Arg = N->getOperand(i + NumElems/2);
2336 if (!isUndefOrEqual(Arg, i + NumElems))
2343 /// isUNPCKLMask - Return true if the specified VECTOR_SHUFFLE operand
2344 /// specifies a shuffle of elements that is suitable for input to UNPCKL.
2345 template<class SDOperand>
2346 bool static isUNPCKLMask(SDOperand *Elts, unsigned NumElts,
2347 bool V2IsSplat = false) {
2348 if (NumElts != 2 && NumElts != 4 && NumElts != 8 && NumElts != 16)
2351 for (unsigned i = 0, j = 0; i != NumElts; i += 2, ++j) {
2352 SDValue BitI = Elts[i];
2353 SDValue BitI1 = Elts[i+1];
2354 if (!isUndefOrEqual(BitI, j))
2357 if (!isUndefOrEqual(BitI1, NumElts))
2360 if (!isUndefOrEqual(BitI1, j + NumElts))
2368 bool X86::isUNPCKLMask(SDNode *N, bool V2IsSplat) {
2369 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2370 return ::isUNPCKLMask(N->op_begin(), N->getNumOperands(), V2IsSplat);
2373 /// isUNPCKHMask - Return true if the specified VECTOR_SHUFFLE operand
2374 /// specifies a shuffle of elements that is suitable for input to UNPCKH.
2375 template<class SDOperand>
2376 bool static isUNPCKHMask(SDOperand *Elts, unsigned NumElts,
2377 bool V2IsSplat = false) {
2378 if (NumElts != 2 && NumElts != 4 && NumElts != 8 && NumElts != 16)
2381 for (unsigned i = 0, j = 0; i != NumElts; i += 2, ++j) {
2382 SDValue BitI = Elts[i];
2383 SDValue BitI1 = Elts[i+1];
2384 if (!isUndefOrEqual(BitI, j + NumElts/2))
2387 if (isUndefOrEqual(BitI1, NumElts))
2390 if (!isUndefOrEqual(BitI1, j + NumElts/2 + NumElts))
2398 bool X86::isUNPCKHMask(SDNode *N, bool V2IsSplat) {
2399 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2400 return ::isUNPCKHMask(N->op_begin(), N->getNumOperands(), V2IsSplat);
2403 /// isUNPCKL_v_undef_Mask - Special case of isUNPCKLMask for canonical form
2404 /// of vector_shuffle v, v, <0, 4, 1, 5>, i.e. vector_shuffle v, undef,
2406 bool X86::isUNPCKL_v_undef_Mask(SDNode *N) {
2407 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2409 unsigned NumElems = N->getNumOperands();
2410 if (NumElems != 2 && NumElems != 4 && NumElems != 8 && NumElems != 16)
2413 for (unsigned i = 0, j = 0; i != NumElems; i += 2, ++j) {
2414 SDValue BitI = N->getOperand(i);
2415 SDValue BitI1 = N->getOperand(i+1);
2417 if (!isUndefOrEqual(BitI, j))
2419 if (!isUndefOrEqual(BitI1, j))
2426 /// isUNPCKH_v_undef_Mask - Special case of isUNPCKHMask for canonical form
2427 /// of vector_shuffle v, v, <2, 6, 3, 7>, i.e. vector_shuffle v, undef,
2429 bool X86::isUNPCKH_v_undef_Mask(SDNode *N) {
2430 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2432 unsigned NumElems = N->getNumOperands();
2433 if (NumElems != 2 && NumElems != 4 && NumElems != 8 && NumElems != 16)
2436 for (unsigned i = 0, j = NumElems / 2; i != NumElems; i += 2, ++j) {
2437 SDValue BitI = N->getOperand(i);
2438 SDValue BitI1 = N->getOperand(i + 1);
2440 if (!isUndefOrEqual(BitI, j))
2442 if (!isUndefOrEqual(BitI1, j))
2449 /// isMOVLMask - Return true if the specified VECTOR_SHUFFLE operand
2450 /// specifies a shuffle of elements that is suitable for input to MOVSS,
2451 /// MOVSD, and MOVD, i.e. setting the lowest element.
2452 template<class SDOperand>
2453 static bool isMOVLMask(SDOperand *Elts, unsigned NumElts) {
2454 if (NumElts != 2 && NumElts != 4)
2457 if (!isUndefOrEqual(Elts[0], NumElts))
2460 for (unsigned i = 1; i < NumElts; ++i) {
2461 if (!isUndefOrEqual(Elts[i], i))
2468 bool X86::isMOVLMask(SDNode *N) {
2469 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2470 return ::isMOVLMask(N->op_begin(), N->getNumOperands());
2473 /// isCommutedMOVL - Returns true if the shuffle mask is except the reverse
2474 /// of what x86 movss want. X86 movs requires the lowest element to be lowest
2475 /// element of vector 2 and the other elements to come from vector 1 in order.
2476 template<class SDOperand>
2477 static bool isCommutedMOVL(SDOperand *Ops, unsigned NumOps,
2478 bool V2IsSplat = false,
2479 bool V2IsUndef = false) {
2480 if (NumOps != 2 && NumOps != 4 && NumOps != 8 && NumOps != 16)
2483 if (!isUndefOrEqual(Ops[0], 0))
2486 for (unsigned i = 1; i < NumOps; ++i) {
2487 SDValue Arg = Ops[i];
2488 if (!(isUndefOrEqual(Arg, i+NumOps) ||
2489 (V2IsUndef && isUndefOrInRange(Arg, NumOps, NumOps*2)) ||
2490 (V2IsSplat && isUndefOrEqual(Arg, NumOps))))
2497 static bool isCommutedMOVL(SDNode *N, bool V2IsSplat = false,
2498 bool V2IsUndef = false) {
2499 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2500 return isCommutedMOVL(N->op_begin(), N->getNumOperands(),
2501 V2IsSplat, V2IsUndef);
2504 /// isMOVSHDUPMask - Return true if the specified VECTOR_SHUFFLE operand
2505 /// specifies a shuffle of elements that is suitable for input to MOVSHDUP.
2506 bool X86::isMOVSHDUPMask(SDNode *N) {
2507 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2509 if (N->getNumOperands() != 4)
2512 // Expect 1, 1, 3, 3
2513 for (unsigned i = 0; i < 2; ++i) {
2514 SDValue Arg = N->getOperand(i);
2515 if (Arg.getOpcode() == ISD::UNDEF) continue;
2516 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
2517 unsigned Val = cast<ConstantSDNode>(Arg)->getZExtValue();
2518 if (Val != 1) return false;
2522 for (unsigned i = 2; i < 4; ++i) {
2523 SDValue Arg = N->getOperand(i);
2524 if (Arg.getOpcode() == ISD::UNDEF) continue;
2525 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
2526 unsigned Val = cast<ConstantSDNode>(Arg)->getZExtValue();
2527 if (Val != 3) return false;
2531 // Don't use movshdup if it can be done with a shufps.
2535 /// isMOVSLDUPMask - Return true if the specified VECTOR_SHUFFLE operand
2536 /// specifies a shuffle of elements that is suitable for input to MOVSLDUP.
2537 bool X86::isMOVSLDUPMask(SDNode *N) {
2538 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2540 if (N->getNumOperands() != 4)
2543 // Expect 0, 0, 2, 2
2544 for (unsigned i = 0; i < 2; ++i) {
2545 SDValue Arg = N->getOperand(i);
2546 if (Arg.getOpcode() == ISD::UNDEF) continue;
2547 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
2548 unsigned Val = cast<ConstantSDNode>(Arg)->getZExtValue();
2549 if (Val != 0) return false;
2553 for (unsigned i = 2; i < 4; ++i) {
2554 SDValue Arg = N->getOperand(i);
2555 if (Arg.getOpcode() == ISD::UNDEF) continue;
2556 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
2557 unsigned Val = cast<ConstantSDNode>(Arg)->getZExtValue();
2558 if (Val != 2) return false;
2562 // Don't use movshdup if it can be done with a shufps.
2566 /// isIdentityMask - Return true if the specified VECTOR_SHUFFLE operand
2567 /// specifies a identity operation on the LHS or RHS.
2568 static bool isIdentityMask(SDNode *N, bool RHS = false) {
2569 unsigned NumElems = N->getNumOperands();
2570 for (unsigned i = 0; i < NumElems; ++i)
2571 if (!isUndefOrEqual(N->getOperand(i), i + (RHS ? NumElems : 0)))
2576 /// isSplatMask - Return true if the specified VECTOR_SHUFFLE operand specifies
2577 /// a splat of a single element.
2578 static bool isSplatMask(SDNode *N) {
2579 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2581 // This is a splat operation if each element of the permute is the same, and
2582 // if the value doesn't reference the second vector.
2583 unsigned NumElems = N->getNumOperands();
2584 SDValue ElementBase;
2586 for (; i != NumElems; ++i) {
2587 SDValue Elt = N->getOperand(i);
2588 if (isa<ConstantSDNode>(Elt)) {
2594 if (!ElementBase.getNode())
2597 for (; i != NumElems; ++i) {
2598 SDValue Arg = N->getOperand(i);
2599 if (Arg.getOpcode() == ISD::UNDEF) continue;
2600 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
2601 if (Arg != ElementBase) return false;
2604 // Make sure it is a splat of the first vector operand.
2605 return cast<ConstantSDNode>(ElementBase)->getZExtValue() < NumElems;
2608 /// getSplatMaskEltNo - Given a splat mask, return the index to the element
2609 /// we want to splat.
2610 static SDValue getSplatMaskEltNo(SDNode *N) {
2611 assert(isSplatMask(N) && "Not a splat mask");
2612 unsigned NumElems = N->getNumOperands();
2613 SDValue ElementBase;
2615 for (; i != NumElems; ++i) {
2616 SDValue Elt = N->getOperand(i);
2617 if (isa<ConstantSDNode>(Elt))
2620 assert(0 && " No splat value found!");
2625 /// isSplatMask - Return true if the specified VECTOR_SHUFFLE operand specifies
2626 /// a splat of a single element and it's a 2 or 4 element mask.
2627 bool X86::isSplatMask(SDNode *N) {
2628 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2630 // We can only splat 64-bit, and 32-bit quantities with a single instruction.
2631 if (N->getNumOperands() != 4 && N->getNumOperands() != 2)
2633 return ::isSplatMask(N);
2636 /// isSplatLoMask - Return true if the specified VECTOR_SHUFFLE operand
2637 /// specifies a splat of zero element.
2638 bool X86::isSplatLoMask(SDNode *N) {
2639 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2641 for (unsigned i = 0, e = N->getNumOperands(); i < e; ++i)
2642 if (!isUndefOrEqual(N->getOperand(i), 0))
2647 /// isMOVDDUPMask - Return true if the specified VECTOR_SHUFFLE operand
2648 /// specifies a shuffle of elements that is suitable for input to MOVDDUP.
2649 bool X86::isMOVDDUPMask(SDNode *N) {
2650 assert(N->getOpcode() == ISD::BUILD_VECTOR);
2652 unsigned e = N->getNumOperands() / 2;
2653 for (unsigned i = 0; i < e; ++i)
2654 if (!isUndefOrEqual(N->getOperand(i), i))
2656 for (unsigned i = 0; i < e; ++i)
2657 if (!isUndefOrEqual(N->getOperand(e+i), i))
2662 /// getShuffleSHUFImmediate - Return the appropriate immediate to shuffle
2663 /// the specified isShuffleMask VECTOR_SHUFFLE mask with PSHUF* and SHUFP*
2665 unsigned X86::getShuffleSHUFImmediate(SDNode *N) {
2666 unsigned NumOperands = N->getNumOperands();
2667 unsigned Shift = (NumOperands == 4) ? 2 : 1;
2669 for (unsigned i = 0; i < NumOperands; ++i) {
2671 SDValue Arg = N->getOperand(NumOperands-i-1);
2672 if (Arg.getOpcode() != ISD::UNDEF)
2673 Val = cast<ConstantSDNode>(Arg)->getZExtValue();
2674 if (Val >= NumOperands) Val -= NumOperands;
2676 if (i != NumOperands - 1)
2683 /// getShufflePSHUFHWImmediate - Return the appropriate immediate to shuffle
2684 /// the specified isShuffleMask VECTOR_SHUFFLE mask with PSHUFHW
2686 unsigned X86::getShufflePSHUFHWImmediate(SDNode *N) {
2688 // 8 nodes, but we only care about the last 4.
2689 for (unsigned i = 7; i >= 4; --i) {
2691 SDValue Arg = N->getOperand(i);
2692 if (Arg.getOpcode() != ISD::UNDEF) {
2693 Val = cast<ConstantSDNode>(Arg)->getZExtValue();
2703 /// getShufflePSHUFLWImmediate - Return the appropriate immediate to shuffle
2704 /// the specified isShuffleMask VECTOR_SHUFFLE mask with PSHUFLW
2706 unsigned X86::getShufflePSHUFLWImmediate(SDNode *N) {
2708 // 8 nodes, but we only care about the first 4.
2709 for (int i = 3; i >= 0; --i) {
2711 SDValue Arg = N->getOperand(i);
2712 if (Arg.getOpcode() != ISD::UNDEF)
2713 Val = cast<ConstantSDNode>(Arg)->getZExtValue();
2722 /// CommuteVectorShuffle - Swap vector_shuffle operands as well as
2723 /// values in ther permute mask.
2724 static SDValue CommuteVectorShuffle(SDValue Op, SDValue &V1,
2725 SDValue &V2, SDValue &Mask,
2726 SelectionDAG &DAG) {
2727 MVT VT = Op.getValueType();
2728 MVT MaskVT = Mask.getValueType();
2729 MVT EltVT = MaskVT.getVectorElementType();
2730 unsigned NumElems = Mask.getNumOperands();
2731 SmallVector<SDValue, 8> MaskVec;
2732 DebugLoc dl = Op.getDebugLoc();
2734 for (unsigned i = 0; i != NumElems; ++i) {
2735 SDValue Arg = Mask.getOperand(i);
2736 if (Arg.getOpcode() == ISD::UNDEF) {
2737 MaskVec.push_back(DAG.getUNDEF(EltVT));
2740 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
2741 unsigned Val = cast<ConstantSDNode>(Arg)->getZExtValue();
2743 MaskVec.push_back(DAG.getConstant(Val + NumElems, EltVT));
2745 MaskVec.push_back(DAG.getConstant(Val - NumElems, EltVT));
2749 Mask = DAG.getBUILD_VECTOR(MaskVT, dl, &MaskVec[0], NumElems);
2750 return DAG.getNode(ISD::VECTOR_SHUFFLE, dl, VT, V1, V2, Mask);
2753 /// CommuteVectorShuffleMask - Change values in a shuffle permute mask assuming
2754 /// the two vector operands have swapped position.
2756 SDValue CommuteVectorShuffleMask(SDValue Mask, SelectionDAG &DAG, DebugLoc dl) {
2757 MVT MaskVT = Mask.getValueType();
2758 MVT EltVT = MaskVT.getVectorElementType();
2759 unsigned NumElems = Mask.getNumOperands();
2760 SmallVector<SDValue, 8> MaskVec;
2761 for (unsigned i = 0; i != NumElems; ++i) {
2762 SDValue Arg = Mask.getOperand(i);
2763 if (Arg.getOpcode() == ISD::UNDEF) {
2764 MaskVec.push_back(DAG.getUNDEF(EltVT));
2767 assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
2768 unsigned Val = cast<ConstantSDNode>(Arg)->getZExtValue();
2770 MaskVec.push_back(DAG.getConstant(Val + NumElems, EltVT));
2772 MaskVec.push_back(DAG.getConstant(Val - NumElems, EltVT));
2774 return DAG.getBUILD_VECTOR(MaskVT, dl, &MaskVec[0], NumElems);
2778 /// ShouldXformToMOVHLPS - Return true if the node should be transformed to
2779 /// match movhlps. The lower half elements should come from upper half of
2780 /// V1 (and in order), and the upper half elements should come from the upper
2781 /// half of V2 (and in order).
2782 static bool ShouldXformToMOVHLPS(SDNode *Mask) {
2783 unsigned NumElems = Mask->getNumOperands();
2786 for (unsigned i = 0, e = 2; i != e; ++i)
2787 if (!isUndefOrEqual(Mask->getOperand(i), i+2))
2789 for (unsigned i = 2; i != 4; ++i)
2790 if (!isUndefOrEqual(Mask->getOperand(i), i+4))
2795 /// isScalarLoadToVector - Returns true if the node is a scalar load that
2796 /// is promoted to a vector. It also returns the LoadSDNode by reference if
2798 static bool isScalarLoadToVector(SDNode *N, LoadSDNode **LD = NULL) {
2799 if (N->getOpcode() != ISD::SCALAR_TO_VECTOR)
2801 N = N->getOperand(0).getNode();
2802 if (!ISD::isNON_EXTLoad(N))
2805 *LD = cast<LoadSDNode>(N);
2809 /// ShouldXformToMOVLP{S|D} - Return true if the node should be transformed to
2810 /// match movlp{s|d}. The lower half elements should come from lower half of
2811 /// V1 (and in order), and the upper half elements should come from the upper
2812 /// half of V2 (and in order). And since V1 will become the source of the
2813 /// MOVLP, it must be either a vector load or a scalar load to vector.
2814 static bool ShouldXformToMOVLP(SDNode *V1, SDNode *V2, SDNode *Mask) {
2815 if (!ISD::isNON_EXTLoad(V1) && !isScalarLoadToVector(V1))
2817 // Is V2 is a vector load, don't do this transformation. We will try to use
2818 // load folding shufps op.
2819 if (ISD::isNON_EXTLoad(V2))
2822 unsigned NumElems = Mask->getNumOperands();
2823 if (NumElems != 2 && NumElems != 4)
2825 for (unsigned i = 0, e = NumElems/2; i != e; ++i)
2826 if (!isUndefOrEqual(Mask->getOperand(i), i))
2828 for (unsigned i = NumElems/2; i != NumElems; ++i)
2829 if (!isUndefOrEqual(Mask->getOperand(i), i+NumElems))
2834 /// isSplatVector - Returns true if N is a BUILD_VECTOR node whose elements are
2836 static bool isSplatVector(SDNode *N) {
2837 if (N->getOpcode() != ISD::BUILD_VECTOR)
2840 SDValue SplatValue = N->getOperand(0);
2841 for (unsigned i = 1, e = N->getNumOperands(); i != e; ++i)
2842 if (N->getOperand(i) != SplatValue)
2847 /// isUndefShuffle - Returns true if N is a VECTOR_SHUFFLE that can be resolved
2849 static bool isUndefShuffle(SDNode *N) {
2850 if (N->getOpcode() != ISD::VECTOR_SHUFFLE)
2853 SDValue V1 = N->getOperand(0);
2854 SDValue V2 = N->getOperand(1);
2855 SDValue Mask = N->getOperand(2);
2856 unsigned NumElems = Mask.getNumOperands();
2857 for (unsigned i = 0; i != NumElems; ++i) {
2858 SDValue Arg = Mask.getOperand(i);
2859 if (Arg.getOpcode() != ISD::UNDEF) {
2860 unsigned Val = cast<ConstantSDNode>(Arg)->getZExtValue();
2861 if (Val < NumElems && V1.getOpcode() != ISD::UNDEF)
2863 else if (Val >= NumElems && V2.getOpcode() != ISD::UNDEF)
2870 /// isZeroNode - Returns true if Elt is a constant zero or a floating point
2872 static inline bool isZeroNode(SDValue Elt) {
2873 return ((isa<ConstantSDNode>(Elt) &&
2874 cast<ConstantSDNode>(Elt)->getZExtValue() == 0) ||
2875 (isa<ConstantFPSDNode>(Elt) &&
2876 cast<ConstantFPSDNode>(Elt)->getValueAPF().isPosZero()));
2879 /// isZeroShuffle - Returns true if N is a VECTOR_SHUFFLE that can be resolved
2880 /// to an zero vector.
2881 static bool isZeroShuffle(SDNode *N) {
2882 if (N->getOpcode() != ISD::VECTOR_SHUFFLE)
2885 SDValue V1 = N->getOperand(0);
2886 SDValue V2 = N->getOperand(1);
2887 SDValue Mask = N->getOperand(2);
2888 unsigned NumElems = Mask.getNumOperands();
2889 for (unsigned i = 0; i != NumElems; ++i) {
2890 SDValue Arg = Mask.getOperand(i);
2891 if (Arg.getOpcode() == ISD::UNDEF)
2894 unsigned Idx = cast<ConstantSDNode>(Arg)->getZExtValue();
2895 if (Idx < NumElems) {
2896 unsigned Opc = V1.getNode()->getOpcode();
2897 if (Opc == ISD::UNDEF || ISD::isBuildVectorAllZeros(V1.getNode()))
2899 if (Opc != ISD::BUILD_VECTOR ||
2900 !isZeroNode(V1.getNode()->getOperand(Idx)))
2902 } else if (Idx >= NumElems) {
2903 unsigned Opc = V2.getNode()->getOpcode();
2904 if (Opc == ISD::UNDEF || ISD::isBuildVectorAllZeros(V2.getNode()))
2906 if (Opc != ISD::BUILD_VECTOR ||
2907 !isZeroNode(V2.getNode()->getOperand(Idx - NumElems)))
2914 /// getZeroVector - Returns a vector of specified type with all zero elements.
2916 static SDValue getZeroVector(MVT VT, bool HasSSE2, SelectionDAG &DAG,
2918 assert(VT.isVector() && "Expected a vector type");
2920 // Always build zero vectors as <4 x i32> or <2 x i32> bitcasted to their dest
2921 // type. This ensures they get CSE'd.
2923 if (VT.getSizeInBits() == 64) { // MMX
2924 SDValue Cst = DAG.getTargetConstant(0, MVT::i32);
2925 Vec = DAG.getBUILD_VECTOR(MVT::v2i32, dl, Cst, Cst);
2926 } else if (HasSSE2) { // SSE2
2927 SDValue Cst = DAG.getTargetConstant(0, MVT::i32);
2928 Vec = DAG.getBUILD_VECTOR(MVT::v4i32, dl, Cst, Cst, Cst, Cst);
2930 SDValue Cst = DAG.getTargetConstantFP(+0.0, MVT::f32);
2931 Vec = DAG.getBUILD_VECTOR(MVT::v4f32, dl, Cst, Cst, Cst, Cst);
2933 return DAG.getNode(ISD::BIT_CONVERT, dl, VT, Vec);
2936 /// getOnesVector - Returns a vector of specified type with all bits set.
2938 static SDValue getOnesVector(MVT VT, SelectionDAG &DAG, DebugLoc dl) {
2939 assert(VT.isVector() && "Expected a vector type");
2941 // Always build ones vectors as <4 x i32> or <2 x i32> bitcasted to their dest
2942 // type. This ensures they get CSE'd.
2943 SDValue Cst = DAG.getTargetConstant(~0U, MVT::i32);
2945 if (VT.getSizeInBits() == 64) // MMX
2946 Vec = DAG.getBUILD_VECTOR(MVT::v2i32, dl, Cst, Cst);
2948 Vec = DAG.getBUILD_VECTOR(MVT::v4i32, dl, Cst, Cst, Cst, Cst);
2949 return DAG.getNode(ISD::BIT_CONVERT, dl, VT, Vec);
2953 /// NormalizeMask - V2 is a splat, modify the mask (if needed) so all elements
2954 /// that point to V2 points to its first element.
2955 static SDValue NormalizeMask(SDValue Mask, SelectionDAG &DAG) {
2956 assert(Mask.getOpcode() == ISD::BUILD_VECTOR);
2958 bool Changed = false;
2959 SmallVector<SDValue, 8> MaskVec;
2960 unsigned NumElems = Mask.getNumOperands();
2961 for (unsigned i = 0; i != NumElems; ++i) {
2962 SDValue Arg = Mask.getOperand(i);
2963 if (Arg.getOpcode() != ISD::UNDEF) {
2964 unsigned Val = cast<ConstantSDNode>(Arg)->getZExtValue();
2965 if (Val > NumElems) {
2966 Arg = DAG.getConstant(NumElems, Arg.getValueType());
2970 MaskVec.push_back(Arg);
2974 Mask = DAG.getBUILD_VECTOR(Mask.getValueType(), Mask.getDebugLoc(),
2975 &MaskVec[0], MaskVec.size());
2979 /// getMOVLMask - Returns a vector_shuffle mask for an movs{s|d}, movd
2980 /// operation of specified width.
2981 static SDValue getMOVLMask(unsigned NumElems, SelectionDAG &DAG, DebugLoc dl) {
2982 MVT MaskVT = MVT::getIntVectorWithNumElements(NumElems);
2983 MVT BaseVT = MaskVT.getVectorElementType();
2985 SmallVector<SDValue, 8> MaskVec;
2986 MaskVec.push_back(DAG.getConstant(NumElems, BaseVT));
2987 for (unsigned i = 1; i != NumElems; ++i)
2988 MaskVec.push_back(DAG.getConstant(i, BaseVT));
2989 return DAG.getBUILD_VECTOR(MaskVT, dl, &MaskVec[0], MaskVec.size());
2992 /// getUnpacklMask - Returns a vector_shuffle mask for an unpackl operation
2993 /// of specified width.
2994 static SDValue getUnpacklMask(unsigned NumElems, SelectionDAG &DAG,
2996 MVT MaskVT = MVT::getIntVectorWithNumElements(NumElems);
2997 MVT BaseVT = MaskVT.getVectorElementType();
2998 SmallVector<SDValue, 8> MaskVec;
2999 for (unsigned i = 0, e = NumElems/2; i != e; ++i) {
3000 MaskVec.push_back(DAG.getConstant(i, BaseVT));
3001 MaskVec.push_back(DAG.getConstant(i + NumElems, BaseVT));
3003 return DAG.getBUILD_VECTOR(MaskVT, dl, &MaskVec[0], MaskVec.size());
3006 /// getUnpackhMask - Returns a vector_shuffle mask for an unpackh operation
3007 /// of specified width.
3008 static SDValue getUnpackhMask(unsigned NumElems, SelectionDAG &DAG,
3010 MVT MaskVT = MVT::getIntVectorWithNumElements(NumElems);
3011 MVT BaseVT = MaskVT.getVectorElementType();
3012 unsigned Half = NumElems/2;
3013 SmallVector<SDValue, 8> MaskVec;
3014 for (unsigned i = 0; i != Half; ++i) {
3015 MaskVec.push_back(DAG.getConstant(i + Half, BaseVT));
3016 MaskVec.push_back(DAG.getConstant(i + NumElems + Half, BaseVT));
3018 return DAG.getBUILD_VECTOR(MaskVT, dl, &MaskVec[0], MaskVec.size());
3021 /// getSwapEltZeroMask - Returns a vector_shuffle mask for a shuffle that swaps
3022 /// element #0 of a vector with the specified index, leaving the rest of the
3023 /// elements in place.
3024 static SDValue getSwapEltZeroMask(unsigned NumElems, unsigned DestElt,
3025 SelectionDAG &DAG, DebugLoc dl) {
3026 MVT MaskVT = MVT::getIntVectorWithNumElements(NumElems);
3027 MVT BaseVT = MaskVT.getVectorElementType();
3028 SmallVector<SDValue, 8> MaskVec;
3029 // Element #0 of the result gets the elt we are replacing.
3030 MaskVec.push_back(DAG.getConstant(DestElt, BaseVT));
3031 for (unsigned i = 1; i != NumElems; ++i)
3032 MaskVec.push_back(DAG.getConstant(i == DestElt ? 0 : i, BaseVT));
3033 return DAG.getBUILD_VECTOR(MaskVT, dl, &MaskVec[0], MaskVec.size());
3036 /// PromoteSplat - Promote a splat of v4f32, v8i16 or v16i8 to v4i32.
3037 static SDValue PromoteSplat(SDValue Op, SelectionDAG &DAG, bool HasSSE2) {
3038 MVT PVT = HasSSE2 ? MVT::v4i32 : MVT::v4f32;
3039 MVT VT = Op.getValueType();
3042 SDValue V1 = Op.getOperand(0);
3043 SDValue Mask = Op.getOperand(2);
3044 unsigned MaskNumElems = Mask.getNumOperands();
3045 unsigned NumElems = MaskNumElems;
3046 DebugLoc dl = Op.getDebugLoc();
3047 // Special handling of v4f32 -> v4i32.
3048 if (VT != MVT::v4f32) {
3049 // Find which element we want to splat.
3050 SDNode* EltNoNode = getSplatMaskEltNo(Mask.getNode()).getNode();
3051 unsigned EltNo = cast<ConstantSDNode>(EltNoNode)->getZExtValue();
3052 // unpack elements to the correct location
3053 while (NumElems > 4) {
3054 if (EltNo < NumElems/2) {
3055 Mask = getUnpacklMask(MaskNumElems, DAG, dl);
3057 Mask = getUnpackhMask(MaskNumElems, DAG, dl);
3058 EltNo -= NumElems/2;
3060 V1 = DAG.getNode(ISD::VECTOR_SHUFFLE, dl, VT, V1, V1, Mask);
3063 SDValue Cst = DAG.getConstant(EltNo, MVT::i32);
3064 Mask = DAG.getBUILD_VECTOR(MVT::v4i32, dl, Cst, Cst, Cst, Cst);
3067 V1 = DAG.getNode(ISD::BIT_CONVERT, dl, PVT, V1);
3068 SDValue Shuffle = DAG.getNode(ISD::VECTOR_SHUFFLE, dl, PVT, V1,
3069 DAG.getUNDEF(PVT), Mask);
3070 return DAG.getNode(ISD::BIT_CONVERT, dl, VT, Shuffle);
3073 /// isVectorLoad - Returns true if the node is a vector load, a scalar
3074 /// load that's promoted to vector, or a load bitcasted.
3075 static bool isVectorLoad(SDValue Op) {
3076 assert(Op.getValueType().isVector() && "Expected a vector type");
3077 if (Op.getOpcode() == ISD::SCALAR_TO_VECTOR ||
3078 Op.getOpcode() == ISD::BIT_CONVERT) {
3079 return isa<LoadSDNode>(Op.getOperand(0));
3081 return isa<LoadSDNode>(Op);
3085 /// CanonicalizeMovddup - Cannonicalize movddup shuffle to v2f64.
3087 static SDValue CanonicalizeMovddup(SDValue Op, SDValue V1, SDValue Mask,
3088 SelectionDAG &DAG, bool HasSSE3) {
3089 // If we have sse3 and shuffle has more than one use or input is a load, then
3090 // use movddup. Otherwise, use movlhps.
3091 bool UseMovddup = HasSSE3 && (!Op.hasOneUse() || isVectorLoad(V1));
3092 MVT PVT = UseMovddup ? MVT::v2f64 : MVT::v4f32;
3093 MVT VT = Op.getValueType();
3096 DebugLoc dl = Op.getDebugLoc();
3097 unsigned NumElems = PVT.getVectorNumElements();
3098 if (NumElems == 2) {
3099 SDValue Cst = DAG.getTargetConstant(0, MVT::i32);
3100 Mask = DAG.getBUILD_VECTOR(MVT::v2i32, dl, Cst, Cst);
3102 assert(NumElems == 4);
3103 SDValue Cst0 = DAG.getTargetConstant(0, MVT::i32);
3104 SDValue Cst1 = DAG.getTargetConstant(1, MVT::i32);
3105 Mask = DAG.getBUILD_VECTOR(MVT::v4i32, dl, Cst0, Cst1, Cst0, Cst1);
3108 V1 = DAG.getNode(ISD::BIT_CONVERT, dl, PVT, V1);
3109 SDValue Shuffle = DAG.getNode(ISD::VECTOR_SHUFFLE, dl, PVT, V1,
3110 DAG.getUNDEF(PVT), Mask);
3111 return DAG.getNode(ISD::BIT_CONVERT, dl, VT, Shuffle);
3114 /// getShuffleVectorZeroOrUndef - Return a vector_shuffle of the specified
3115 /// vector of zero or undef vector. This produces a shuffle where the low
3116 /// element of V2 is swizzled into the zero/undef vector, landing at element
3117 /// Idx. This produces a shuffle mask like 4,1,2,3 (idx=0) or 0,1,2,4 (idx=3).
3118 static SDValue getShuffleVectorZeroOrUndef(SDValue V2, unsigned Idx,
3119 bool isZero, bool HasSSE2,
3120 SelectionDAG &DAG) {
3121 DebugLoc dl = V2.getDebugLoc();
3122 MVT VT = V2.getValueType();
3124 ? getZeroVector(VT, HasSSE2, DAG, dl) : DAG.getUNDEF(VT);
3125 unsigned NumElems = V2.getValueType().getVectorNumElements();
3126 MVT MaskVT = MVT::getIntVectorWithNumElements(NumElems);
3127 MVT EVT = MaskVT.getVectorElementType();
3128 SmallVector<SDValue, 16> MaskVec;
3129 for (unsigned i = 0; i != NumElems; ++i)
3130 if (i == Idx) // If this is the insertion idx, put the low elt of V2 here.
3131 MaskVec.push_back(DAG.getConstant(NumElems, EVT));
3133 MaskVec.push_back(DAG.getConstant(i, EVT));
3134 SDValue Mask = DAG.getBUILD_VECTOR(MaskVT, dl, &MaskVec[0], MaskVec.size());
3135 return DAG.getNode(ISD::VECTOR_SHUFFLE, dl, VT, V1, V2, Mask);
3138 /// getNumOfConsecutiveZeros - Return the number of elements in a result of
3139 /// a shuffle that is zero.
3141 unsigned getNumOfConsecutiveZeros(SDValue Op, SDValue Mask,
3142 unsigned NumElems, bool Low,
3143 SelectionDAG &DAG) {
3144 unsigned NumZeros = 0;
3145 for (unsigned i = 0; i < NumElems; ++i) {
3146 unsigned Index = Low ? i : NumElems-i-1;
3147 SDValue Idx = Mask.getOperand(Index);
3148 if (Idx.getOpcode() == ISD::UNDEF) {
3152 SDValue Elt = DAG.getShuffleScalarElt(Op.getNode(), Index);
3153 if (Elt.getNode() && isZeroNode(Elt))
3161 /// isVectorShift - Returns true if the shuffle can be implemented as a
3162 /// logical left or right shift of a vector.
3163 static bool isVectorShift(SDValue Op, SDValue Mask, SelectionDAG &DAG,
3164 bool &isLeft, SDValue &ShVal, unsigned &ShAmt) {
3165 unsigned NumElems = Mask.getNumOperands();
3168 unsigned NumZeros= getNumOfConsecutiveZeros(Op, Mask, NumElems, true, DAG);
3171 NumZeros = getNumOfConsecutiveZeros(Op, Mask, NumElems, false, DAG);
3176 bool SeenV1 = false;
3177 bool SeenV2 = false;
3178 for (unsigned i = NumZeros; i < NumElems; ++i) {
3179 unsigned Val = isLeft ? (i - NumZeros) : i;
3180 SDValue Idx = Mask.getOperand(isLeft ? i : (i - NumZeros));
3181 if (Idx.getOpcode() == ISD::UNDEF)
3183 unsigned Index = cast<ConstantSDNode>(Idx)->getZExtValue();
3184 if (Index < NumElems)
3193 if (SeenV1 && SeenV2)
3196 ShVal = SeenV1 ? Op.getOperand(0) : Op.getOperand(1);
3202 /// LowerBuildVectorv16i8 - Custom lower build_vector of v16i8.
3204 static SDValue LowerBuildVectorv16i8(SDValue Op, unsigned NonZeros,
3205 unsigned NumNonZero, unsigned NumZero,
3206 SelectionDAG &DAG, TargetLowering &TLI) {
3210 DebugLoc dl = Op.getDebugLoc();
3213 for (unsigned i = 0; i < 16; ++i) {
3214 bool ThisIsNonZero = (NonZeros & (1 << i)) != 0;
3215 if (ThisIsNonZero && First) {
3217 V = getZeroVector(MVT::v8i16, true, DAG, dl);
3219 V = DAG.getUNDEF(MVT::v8i16);
3224 SDValue ThisElt(0, 0), LastElt(0, 0);
3225 bool LastIsNonZero = (NonZeros & (1 << (i-1))) != 0;
3226 if (LastIsNonZero) {
3227 LastElt = DAG.getNode(ISD::ZERO_EXTEND, dl,
3228 MVT::i16, Op.getOperand(i-1));
3230 if (ThisIsNonZero) {
3231 ThisElt = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i16, Op.getOperand(i));
3232 ThisElt = DAG.getNode(ISD::SHL, dl, MVT::i16,
3233 ThisElt, DAG.getConstant(8, MVT::i8));
3235 ThisElt = DAG.getNode(ISD::OR, dl, MVT::i16, ThisElt, LastElt);
3239 if (ThisElt.getNode())
3240 V = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, V, ThisElt,
3241 DAG.getIntPtrConstant(i/2));
3245 return DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v16i8, V);
3248 /// LowerBuildVectorv8i16 - Custom lower build_vector of v8i16.
3250 static SDValue LowerBuildVectorv8i16(SDValue Op, unsigned NonZeros,
3251 unsigned NumNonZero, unsigned NumZero,
3252 SelectionDAG &DAG, TargetLowering &TLI) {
3256 DebugLoc dl = Op.getDebugLoc();
3259 for (unsigned i = 0; i < 8; ++i) {
3260 bool isNonZero = (NonZeros & (1 << i)) != 0;
3264 V = getZeroVector(MVT::v8i16, true, DAG, dl);
3266 V = DAG.getUNDEF(MVT::v8i16);
3269 V = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl,
3270 MVT::v8i16, V, Op.getOperand(i),
3271 DAG.getIntPtrConstant(i));
3278 /// getVShift - Return a vector logical shift node.
3280 static SDValue getVShift(bool isLeft, MVT VT, SDValue SrcOp,
3281 unsigned NumBits, SelectionDAG &DAG,
3282 const TargetLowering &TLI, DebugLoc dl) {
3283 bool isMMX = VT.getSizeInBits() == 64;
3284 MVT ShVT = isMMX ? MVT::v1i64 : MVT::v2i64;
3285 unsigned Opc = isLeft ? X86ISD::VSHL : X86ISD::VSRL;
3286 SrcOp = DAG.getNode(ISD::BIT_CONVERT, dl, ShVT, SrcOp);
3287 return DAG.getNode(ISD::BIT_CONVERT, dl, VT,
3288 DAG.getNode(Opc, dl, ShVT, SrcOp,
3289 DAG.getConstant(NumBits, TLI.getShiftAmountTy())));
3293 X86TargetLowering::LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG) {
3294 DebugLoc dl = Op.getDebugLoc();
3295 // All zero's are handled with pxor, all one's are handled with pcmpeqd.
3296 if (ISD::isBuildVectorAllZeros(Op.getNode())
3297 || ISD::isBuildVectorAllOnes(Op.getNode())) {
3298 // Canonicalize this to either <4 x i32> or <2 x i32> (SSE vs MMX) to
3299 // 1) ensure the zero vectors are CSE'd, and 2) ensure that i64 scalars are
3300 // eliminated on x86-32 hosts.
3301 if (Op.getValueType() == MVT::v4i32 || Op.getValueType() == MVT::v2i32)
3304 if (ISD::isBuildVectorAllOnes(Op.getNode()))
3305 return getOnesVector(Op.getValueType(), DAG, dl);
3306 return getZeroVector(Op.getValueType(), Subtarget->hasSSE2(), DAG, dl);
3309 MVT VT = Op.getValueType();
3310 MVT EVT = VT.getVectorElementType();
3311 unsigned EVTBits = EVT.getSizeInBits();
3313 unsigned NumElems = Op.getNumOperands();
3314 unsigned NumZero = 0;
3315 unsigned NumNonZero = 0;
3316 unsigned NonZeros = 0;
3317 bool IsAllConstants = true;
3318 SmallSet<SDValue, 8> Values;
3319 for (unsigned i = 0; i < NumElems; ++i) {
3320 SDValue Elt = Op.getOperand(i);
3321 if (Elt.getOpcode() == ISD::UNDEF)
3324 if (Elt.getOpcode() != ISD::Constant &&
3325 Elt.getOpcode() != ISD::ConstantFP)
3326 IsAllConstants = false;
3327 if (isZeroNode(Elt))
3330 NonZeros |= (1 << i);
3335 if (NumNonZero == 0) {
3336 // All undef vector. Return an UNDEF. All zero vectors were handled above.
3337 return DAG.getUNDEF(VT);
3340 // Special case for single non-zero, non-undef, element.
3341 if (NumNonZero == 1 && NumElems <= 4) {
3342 unsigned Idx = CountTrailingZeros_32(NonZeros);
3343 SDValue Item = Op.getOperand(Idx);
3345 // If this is an insertion of an i64 value on x86-32, and if the top bits of
3346 // the value are obviously zero, truncate the value to i32 and do the
3347 // insertion that way. Only do this if the value is non-constant or if the
3348 // value is a constant being inserted into element 0. It is cheaper to do
3349 // a constant pool load than it is to do a movd + shuffle.
3350 if (EVT == MVT::i64 && !Subtarget->is64Bit() &&
3351 (!IsAllConstants || Idx == 0)) {
3352 if (DAG.MaskedValueIsZero(Item, APInt::getBitsSet(64, 32, 64))) {
3353 // Handle MMX and SSE both.
3354 MVT VecVT = VT == MVT::v2i64 ? MVT::v4i32 : MVT::v2i32;
3355 unsigned VecElts = VT == MVT::v2i64 ? 4 : 2;
3357 // Truncate the value (which may itself be a constant) to i32, and
3358 // convert it to a vector with movd (S2V+shuffle to zero extend).
3359 Item = DAG.getNode(ISD::TRUNCATE, dl, MVT::i32, Item);
3360 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VecVT, Item);
3361 Item = getShuffleVectorZeroOrUndef(Item, 0, true,
3362 Subtarget->hasSSE2(), DAG);
3364 // Now we have our 32-bit value zero extended in the low element of
3365 // a vector. If Idx != 0, swizzle it into place.
3368 Item, DAG.getUNDEF(Item.getValueType()),
3369 getSwapEltZeroMask(VecElts, Idx, DAG, dl)
3371 Item = DAG.getNode(ISD::VECTOR_SHUFFLE, dl, VecVT, Ops, 3);
3373 return DAG.getNode(ISD::BIT_CONVERT, dl, Op.getValueType(), Item);
3377 // If we have a constant or non-constant insertion into the low element of
3378 // a vector, we can do this with SCALAR_TO_VECTOR + shuffle of zero into
3379 // the rest of the elements. This will be matched as movd/movq/movss/movsd
3380 // depending on what the source datatype is. Because we can only get here
3381 // when NumElems <= 4, this only needs to handle i32/f32/i64/f64.
3383 // Don't do this for i64 values on x86-32.
3384 (EVT != MVT::i64 || Subtarget->is64Bit())) {
3385 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Item);
3386 // Turn it into a MOVL (i.e. movss, movsd, or movd) to a zero vector.
3387 return getShuffleVectorZeroOrUndef(Item, 0, NumZero > 0,
3388 Subtarget->hasSSE2(), DAG);
3391 // Is it a vector logical left shift?
3392 if (NumElems == 2 && Idx == 1 &&
3393 isZeroNode(Op.getOperand(0)) && !isZeroNode(Op.getOperand(1))) {
3394 unsigned NumBits = VT.getSizeInBits();
3395 return getVShift(true, VT,
3396 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
3397 VT, Op.getOperand(1)),
3398 NumBits/2, DAG, *this, dl);
3401 if (IsAllConstants) // Otherwise, it's better to do a constpool load.
3404 // Otherwise, if this is a vector with i32 or f32 elements, and the element
3405 // is a non-constant being inserted into an element other than the low one,
3406 // we can't use a constant pool load. Instead, use SCALAR_TO_VECTOR (aka
3407 // movd/movss) to move this into the low element, then shuffle it into
3409 if (EVTBits == 32) {
3410 Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Item);
3412 // Turn it into a shuffle of zero and zero-extended scalar to vector.
3413 Item = getShuffleVectorZeroOrUndef(Item, 0, NumZero > 0,
3414 Subtarget->hasSSE2(), DAG);
3415 MVT MaskVT = MVT::getIntVectorWithNumElements(NumElems);
3416 MVT MaskEVT = MaskVT.getVectorElementType();
3417 SmallVector<SDValue, 8> MaskVec;
3418 for (unsigned i = 0; i < NumElems; i++)
3419 MaskVec.push_back(DAG.getConstant((i == Idx) ? 0 : 1, MaskEVT));
3420 SDValue Mask = DAG.getBUILD_VECTOR(MaskVT, dl, &MaskVec[0], MaskVec.size());
3421 return DAG.getNode(ISD::VECTOR_SHUFFLE, dl, VT, Item,
3422 DAG.getUNDEF(VT), Mask);
3426 // Splat is obviously ok. Let legalizer expand it to a shuffle.
3427 if (Values.size() == 1)
3430 // A vector full of immediates; various special cases are already
3431 // handled, so this is best done with a single constant-pool load.
3435 // Let legalizer expand 2-wide build_vectors.
3436 if (EVTBits == 64) {
3437 if (NumNonZero == 1) {
3438 // One half is zero or undef.
3439 unsigned Idx = CountTrailingZeros_32(NonZeros);
3440 SDValue V2 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT,
3441 Op.getOperand(Idx));
3442 return getShuffleVectorZeroOrUndef(V2, Idx, true,
3443 Subtarget->hasSSE2(), DAG);
3448 // If element VT is < 32 bits, convert it to inserts into a zero vector.
3449 if (EVTBits == 8 && NumElems == 16) {
3450 SDValue V = LowerBuildVectorv16i8(Op, NonZeros,NumNonZero,NumZero, DAG,
3452 if (V.getNode()) return V;
3455 if (EVTBits == 16 && NumElems == 8) {
3456 SDValue V = LowerBuildVectorv8i16(Op, NonZeros,NumNonZero,NumZero, DAG,
3458 if (V.getNode()) return V;
3461 // If element VT is == 32 bits, turn it into a number of shuffles.
3462 SmallVector<SDValue, 8> V;
3464 if (NumElems == 4 && NumZero > 0) {
3465 for (unsigned i = 0; i < 4; ++i) {
3466 bool isZero = !(NonZeros & (1 << i));
3468 V[i] = getZeroVector(VT, Subtarget->hasSSE2(), DAG, dl);
3470 V[i] = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Op.getOperand(i));
3473 for (unsigned i = 0; i < 2; ++i) {
3474 switch ((NonZeros & (0x3 << i*2)) >> (i*2)) {
3477 V[i] = V[i*2]; // Must be a zero vector.
3480 V[i] = DAG.getNode(ISD::VECTOR_SHUFFLE, dl, VT, V[i*2+1], V[i*2],
3481 getMOVLMask(NumElems, DAG, dl));
3484 V[i] = DAG.getNode(ISD::VECTOR_SHUFFLE, dl, VT, V[i*2], V[i*2+1],
3485 getMOVLMask(NumElems, DAG, dl));
3488 V[i] = DAG.getNode(ISD::VECTOR_SHUFFLE, dl, VT, V[i*2], V[i*2+1],
3489 getUnpacklMask(NumElems, DAG, dl));
3494 MVT MaskVT = MVT::getIntVectorWithNumElements(NumElems);
3495 MVT EVT = MaskVT.getVectorElementType();
3496 SmallVector<SDValue, 8> MaskVec;
3497 bool Reverse = (NonZeros & 0x3) == 2;
3498 for (unsigned i = 0; i < 2; ++i)
3500 MaskVec.push_back(DAG.getConstant(1-i, EVT));
3502 MaskVec.push_back(DAG.getConstant(i, EVT));
3503 Reverse = ((NonZeros & (0x3 << 2)) >> 2) == 2;
3504 for (unsigned i = 0; i < 2; ++i)
3506 MaskVec.push_back(DAG.getConstant(1-i+NumElems, EVT));
3508 MaskVec.push_back(DAG.getConstant(i+NumElems, EVT));
3509 SDValue ShufMask = DAG.getBUILD_VECTOR(MaskVT, dl,
3510 &MaskVec[0], MaskVec.size());
3511 return DAG.getNode(ISD::VECTOR_SHUFFLE, dl, VT, V[0], V[1], ShufMask);
3514 if (Values.size() > 2) {
3515 // Expand into a number of unpckl*.
3517 // Step 1: unpcklps 0, 2 ==> X: <?, ?, 2, 0>
3518 // : unpcklps 1, 3 ==> Y: <?, ?, 3, 1>
3519 // Step 2: unpcklps X, Y ==> <3, 2, 1, 0>
3520 SDValue UnpckMask = getUnpacklMask(NumElems, DAG, dl);
3521 for (unsigned i = 0; i < NumElems; ++i)
3522 V[i] = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Op.getOperand(i));
3524 while (NumElems != 0) {
3525 for (unsigned i = 0; i < NumElems; ++i)
3526 V[i] = DAG.getNode(ISD::VECTOR_SHUFFLE, dl, VT, V[i], V[i + NumElems],
3536 // v8i16 shuffles - Prefer shuffles in the following order:
3537 // 1. [all] pshuflw, pshufhw, optional move
3538 // 2. [ssse3] 1 x pshufb
3539 // 3. [ssse3] 2 x pshufb + 1 x por
3540 // 4. [all] mov + pshuflw + pshufhw + N x (pextrw + pinsrw)
3542 SDValue LowerVECTOR_SHUFFLEv8i16(SDValue V1, SDValue V2,
3543 SDValue PermMask, SelectionDAG &DAG,
3544 X86TargetLowering &TLI, DebugLoc dl) {
3545 SmallVector<SDValue, 8> MaskElts(PermMask.getNode()->op_begin(),
3546 PermMask.getNode()->op_end());
3547 SmallVector<int, 8> MaskVals;
3549 // Determine if more than 1 of the words in each of the low and high quadwords
3550 // of the result come from the same quadword of one of the two inputs. Undef
3551 // mask values count as coming from any quadword, for better codegen.
3552 SmallVector<unsigned, 4> LoQuad(4);
3553 SmallVector<unsigned, 4> HiQuad(4);
3554 BitVector InputQuads(4);
3555 for (unsigned i = 0; i < 8; ++i) {
3556 SmallVectorImpl<unsigned> &Quad = i < 4 ? LoQuad : HiQuad;
3557 SDValue Elt = MaskElts[i];
3558 int EltIdx = Elt.getOpcode() == ISD::UNDEF ? -1 :
3559 cast<ConstantSDNode>(Elt)->getZExtValue();
3560 MaskVals.push_back(EltIdx);
3569 InputQuads.set(EltIdx / 4);
3572 int BestLoQuad = -1;
3573 unsigned MaxQuad = 1;
3574 for (unsigned i = 0; i < 4; ++i) {
3575 if (LoQuad[i] > MaxQuad) {
3577 MaxQuad = LoQuad[i];
3581 int BestHiQuad = -1;
3583 for (unsigned i = 0; i < 4; ++i) {
3584 if (HiQuad[i] > MaxQuad) {
3586 MaxQuad = HiQuad[i];
3590 // For SSSE3, If all 8 words of the result come from only 1 quadword of each
3591 // of the two input vectors, shuffle them into one input vector so only a
3592 // single pshufb instruction is necessary. If There are more than 2 input
3593 // quads, disable the next transformation since it does not help SSSE3.
3594 bool V1Used = InputQuads[0] || InputQuads[1];
3595 bool V2Used = InputQuads[2] || InputQuads[3];
3596 if (TLI.getSubtarget()->hasSSSE3()) {
3597 if (InputQuads.count() == 2 && V1Used && V2Used) {
3598 BestLoQuad = InputQuads.find_first();
3599 BestHiQuad = InputQuads.find_next(BestLoQuad);
3601 if (InputQuads.count() > 2) {
3607 // If BestLoQuad or BestHiQuad are set, shuffle the quads together and update
3608 // the shuffle mask. If a quad is scored as -1, that means that it contains
3609 // words from all 4 input quadwords.
3611 if (BestLoQuad >= 0 || BestHiQuad >= 0) {
3612 SmallVector<SDValue,8> MaskV;
3613 MaskV.push_back(DAG.getConstant(BestLoQuad < 0 ? 0 : BestLoQuad, MVT::i64));
3614 MaskV.push_back(DAG.getConstant(BestHiQuad < 0 ? 1 : BestHiQuad, MVT::i64));
3615 SDValue Mask = DAG.getBUILD_VECTOR(MVT::v2i64, dl, &MaskV[0], 2);
3617 NewV = DAG.getNode(ISD::VECTOR_SHUFFLE, dl, MVT::v2i64,
3618 DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v2i64, V1),
3619 DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v2i64, V2), Mask);
3620 NewV = DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v8i16, NewV);
3622 // Rewrite the MaskVals and assign NewV to V1 if NewV now contains all the
3623 // source words for the shuffle, to aid later transformations.
3624 bool AllWordsInNewV = true;
3625 for (unsigned i = 0; i != 8; ++i) {
3626 int idx = MaskVals[i];
3627 if (idx < 0 || (idx/4) == BestLoQuad || (idx/4) == BestHiQuad)
3629 AllWordsInNewV = false;
3633 bool pshuflw = AllWordsInNewV, pshufhw = AllWordsInNewV;
3634 if (AllWordsInNewV) {
3635 for (int i = 0; i != 8; ++i) {
3636 int idx = MaskVals[i];
3639 idx = MaskVals[i] = (idx / 4) == BestLoQuad ? (idx & 3) : (idx & 3) + 4;
3640 if ((idx != i) && idx < 4)
3642 if ((idx != i) && idx > 3)
3651 // If we've eliminated the use of V2, and the new mask is a pshuflw or
3652 // pshufhw, that's as cheap as it gets. Return the new shuffle.
3653 if (pshufhw || pshuflw) {
3655 for (unsigned i = 0; i != 8; ++i)
3656 MaskV.push_back((MaskVals[i] < 0) ? DAG.getUNDEF(MVT::i16)
3657 : DAG.getConstant(MaskVals[i],
3659 return DAG.getNode(ISD::VECTOR_SHUFFLE, dl, MVT::v8i16, NewV,
3660 DAG.getUNDEF(MVT::v8i16),
3661 DAG.getBUILD_VECTOR(MVT::v8i16, dl, &MaskV[0], 8));
3665 // If we have SSSE3, and all words of the result are from 1 input vector,
3666 // case 2 is generated, otherwise case 3 is generated. If no SSSE3
3667 // is present, fall back to case 4.
3668 if (TLI.getSubtarget()->hasSSSE3()) {
3669 SmallVector<SDValue,16> pshufbMask;
3671 // If we have elements from both input vectors, set the high bit of the
3672 // shuffle mask element to zero out elements that come from V2 in the V1
3673 // mask, and elements that come from V1 in the V2 mask, so that the two
3674 // results can be OR'd together.
3675 bool TwoInputs = V1Used && V2Used;
3676 for (unsigned i = 0; i != 8; ++i) {
3677 int EltIdx = MaskVals[i] * 2;
3678 if (TwoInputs && (EltIdx >= 16)) {
3679 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
3680 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
3683 pshufbMask.push_back(DAG.getConstant(EltIdx, MVT::i8));
3684 pshufbMask.push_back(DAG.getConstant(EltIdx+1, MVT::i8));
3686 V1 = DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v16i8, V1);
3687 V1 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V1,
3688 DAG.getBUILD_VECTOR(MVT::v16i8, dl, &pshufbMask[0], 16));
3690 return DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v8i16, V1);
3692 // Calculate the shuffle mask for the second input, shuffle it, and
3693 // OR it with the first shuffled input.
3695 for (unsigned i = 0; i != 8; ++i) {
3696 int EltIdx = MaskVals[i] * 2;
3698 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
3699 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
3702 pshufbMask.push_back(DAG.getConstant(EltIdx - 16, MVT::i8));
3703 pshufbMask.push_back(DAG.getConstant(EltIdx - 15, MVT::i8));
3705 V2 = DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v16i8, V2);
3706 V2 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V2,
3707 DAG.getBUILD_VECTOR(MVT::v16i8, dl, &pshufbMask[0], 16));
3708 V1 = DAG.getNode(ISD::OR, dl, MVT::v16i8, V1, V2);
3709 return DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v8i16, V1);
3712 // If BestLoQuad >= 0, generate a pshuflw to put the low elements in order,
3713 // and update MaskVals with new element order.
3714 BitVector InOrder(8);
3715 if (BestLoQuad >= 0) {
3716 SmallVector<SDValue, 8> MaskV;
3717 for (int i = 0; i != 4; ++i) {
3718 int idx = MaskVals[i];
3720 MaskV.push_back(DAG.getUNDEF(MVT::i16));
3722 } else if ((idx / 4) == BestLoQuad) {
3723 MaskV.push_back(DAG.getConstant(idx & 3, MVT::i16));
3726 MaskV.push_back(DAG.getUNDEF(MVT::i16));
3729 for (unsigned i = 4; i != 8; ++i)
3730 MaskV.push_back(DAG.getConstant(i, MVT::i16));
3731 NewV = DAG.getNode(ISD::VECTOR_SHUFFLE, dl, MVT::v8i16, NewV,
3732 DAG.getUNDEF(MVT::v8i16),
3733 DAG.getBUILD_VECTOR(MVT::v8i16, dl, &MaskV[0], 8));
3736 // If BestHi >= 0, generate a pshufhw to put the high elements in order,
3737 // and update MaskVals with the new element order.
3738 if (BestHiQuad >= 0) {
3739 SmallVector<SDValue, 8> MaskV;
3740 for (unsigned i = 0; i != 4; ++i)
3741 MaskV.push_back(DAG.getConstant(i, MVT::i16));
3742 for (unsigned i = 4; i != 8; ++i) {
3743 int idx = MaskVals[i];
3745 MaskV.push_back(DAG.getUNDEF(MVT::i16));
3747 } else if ((idx / 4) == BestHiQuad) {
3748 MaskV.push_back(DAG.getConstant((idx & 3) + 4, MVT::i16));
3751 MaskV.push_back(DAG.getUNDEF(MVT::i16));
3754 NewV = DAG.getNode(ISD::VECTOR_SHUFFLE, dl, MVT::v8i16, NewV,
3755 DAG.getUNDEF(MVT::v8i16),
3756 DAG.getBUILD_VECTOR(MVT::v8i16, dl, &MaskV[0], 8));
3759 // In case BestHi & BestLo were both -1, which means each quadword has a word
3760 // from each of the four input quadwords, calculate the InOrder bitvector now
3761 // before falling through to the insert/extract cleanup.
3762 if (BestLoQuad == -1 && BestHiQuad == -1) {
3764 for (int i = 0; i != 8; ++i)
3765 if (MaskVals[i] < 0 || MaskVals[i] == i)
3769 // The other elements are put in the right place using pextrw and pinsrw.
3770 for (unsigned i = 0; i != 8; ++i) {
3773 int EltIdx = MaskVals[i];
3776 SDValue ExtOp = (EltIdx < 8)
3777 ? DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, V1,
3778 DAG.getIntPtrConstant(EltIdx))
3779 : DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, V2,
3780 DAG.getIntPtrConstant(EltIdx - 8));
3781 NewV = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, NewV, ExtOp,
3782 DAG.getIntPtrConstant(i));
3787 // v16i8 shuffles - Prefer shuffles in the following order:
3788 // 1. [ssse3] 1 x pshufb
3789 // 2. [ssse3] 2 x pshufb + 1 x por
3790 // 3. [all] v8i16 shuffle + N x pextrw + rotate + pinsrw
3792 SDValue LowerVECTOR_SHUFFLEv16i8(SDValue V1, SDValue V2,
3793 SDValue PermMask, SelectionDAG &DAG,
3794 X86TargetLowering &TLI, DebugLoc dl) {
3795 SmallVector<SDValue, 16> MaskElts(PermMask.getNode()->op_begin(),
3796 PermMask.getNode()->op_end());
3797 SmallVector<int, 16> MaskVals;
3799 // If we have SSSE3, case 1 is generated when all result bytes come from
3800 // one of the inputs. Otherwise, case 2 is generated. If no SSSE3 is
3801 // present, fall back to case 3.
3802 // FIXME: kill V2Only once shuffles are canonizalized by getNode.
3805 for (unsigned i = 0; i < 16; ++i) {
3806 SDValue Elt = MaskElts[i];
3807 int EltIdx = Elt.getOpcode() == ISD::UNDEF ? -1 :
3808 cast<ConstantSDNode>(Elt)->getZExtValue();
3809 MaskVals.push_back(EltIdx);
3818 // If SSSE3, use 1 pshufb instruction per vector with elements in the result.
3819 if (TLI.getSubtarget()->hasSSSE3()) {
3820 SmallVector<SDValue,16> pshufbMask;
3822 // If all result elements are from one input vector, then only translate
3823 // undef mask values to 0x80 (zero out result) in the pshufb mask.
3825 // Otherwise, we have elements from both input vectors, and must zero out
3826 // elements that come from V2 in the first mask, and V1 in the second mask
3827 // so that we can OR them together.
3828 bool TwoInputs = !(V1Only || V2Only);
3829 for (unsigned i = 0; i != 16; ++i) {
3830 int EltIdx = MaskVals[i];
3831 if (EltIdx < 0 || (TwoInputs && EltIdx >= 16)) {
3832 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
3835 pshufbMask.push_back(DAG.getConstant(EltIdx, MVT::i8));
3837 // If all the elements are from V2, assign it to V1 and return after
3838 // building the first pshufb.
3841 V1 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V1,
3842 DAG.getBUILD_VECTOR(MVT::v16i8, dl, &pshufbMask[0], 16));
3846 // Calculate the shuffle mask for the second input, shuffle it, and
3847 // OR it with the first shuffled input.
3849 for (unsigned i = 0; i != 16; ++i) {
3850 int EltIdx = MaskVals[i];
3852 pshufbMask.push_back(DAG.getConstant(0x80, MVT::i8));
3855 pshufbMask.push_back(DAG.getConstant(EltIdx - 16, MVT::i8));
3857 V2 = DAG.getNode(X86ISD::PSHUFB, dl, MVT::v16i8, V2,
3858 DAG.getBUILD_VECTOR(MVT::v16i8, dl, &pshufbMask[0], 16));
3859 return DAG.getNode(ISD::OR, dl, MVT::v16i8, V1, V2);
3862 // No SSSE3 - Calculate in place words and then fix all out of place words
3863 // With 0-16 extracts & inserts. Worst case is 16 bytes out of order from
3864 // the 16 different words that comprise the two doublequadword input vectors.
3865 V1 = DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v8i16, V1);
3866 V2 = DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v8i16, V2);
3867 SDValue NewV = V2Only ? V2 : V1;
3868 for (int i = 0; i != 8; ++i) {
3869 int Elt0 = MaskVals[i*2];
3870 int Elt1 = MaskVals[i*2+1];
3872 // This word of the result is all undef, skip it.
3873 if (Elt0 < 0 && Elt1 < 0)
3876 // This word of the result is already in the correct place, skip it.
3877 if (V1Only && (Elt0 == i*2) && (Elt1 == i*2+1))
3879 if (V2Only && (Elt0 == i*2+16) && (Elt1 == i*2+17))
3882 SDValue Elt0Src = Elt0 < 16 ? V1 : V2;
3883 SDValue Elt1Src = Elt1 < 16 ? V1 : V2;
3886 // If Elt1 is defined, extract it from the appropriate source. If the
3887 // source byte is not also odd, shift the extracted word left 8 bits.
3889 InsElt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, Elt1Src,
3890 DAG.getIntPtrConstant(Elt1 / 2));
3891 if ((Elt1 & 1) == 0)
3892 InsElt = DAG.getNode(ISD::SHL, dl, MVT::i16, InsElt,
3893 DAG.getConstant(8, TLI.getShiftAmountTy()));
3895 // If Elt0 is defined, extract it from the appropriate source. If the
3896 // source byte is not also even, shift the extracted word right 8 bits. If
3897 // Elt1 was also defined, OR the extracted values together before
3898 // inserting them in the result.
3900 SDValue InsElt0 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16,
3901 Elt0Src, DAG.getIntPtrConstant(Elt0 / 2));
3902 if ((Elt0 & 1) != 0)
3903 InsElt0 = DAG.getNode(ISD::SRL, dl, MVT::i16, InsElt0,
3904 DAG.getConstant(8, TLI.getShiftAmountTy()));
3905 InsElt = Elt1 >= 0 ? DAG.getNode(ISD::OR, dl, MVT::i16, InsElt, InsElt0)
3908 NewV = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v8i16, NewV, InsElt,
3909 DAG.getIntPtrConstant(i));
3911 return DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v16i8, NewV);
3914 /// RewriteAsNarrowerShuffle - Try rewriting v8i16 and v16i8 shuffles as 4 wide
3915 /// ones, or rewriting v4i32 / v2f32 as 2 wide ones if possible. This can be
3916 /// done when every pair / quad of shuffle mask elements point to elements in
3917 /// the right sequence. e.g.
3918 /// vector_shuffle <>, <>, < 3, 4, | 10, 11, | 0, 1, | 14, 15>
3920 SDValue RewriteAsNarrowerShuffle(SDValue V1, SDValue V2,
3922 SDValue PermMask, SelectionDAG &DAG,
3923 TargetLowering &TLI, DebugLoc dl) {
3924 unsigned NumElems = PermMask.getNumOperands();
3925 unsigned NewWidth = (NumElems == 4) ? 2 : 4;
3926 MVT MaskVT = MVT::getIntVectorWithNumElements(NewWidth);
3927 MVT MaskEltVT = MaskVT.getVectorElementType();
3929 switch (VT.getSimpleVT()) {
3930 default: assert(false && "Unexpected!");
3931 case MVT::v4f32: NewVT = MVT::v2f64; break;
3932 case MVT::v4i32: NewVT = MVT::v2i64; break;
3933 case MVT::v8i16: NewVT = MVT::v4i32; break;
3934 case MVT::v16i8: NewVT = MVT::v4i32; break;
3937 if (NewWidth == 2) {
3943 unsigned Scale = NumElems / NewWidth;
3944 SmallVector<SDValue, 8> MaskVec;
3945 for (unsigned i = 0; i < NumElems; i += Scale) {
3946 unsigned StartIdx = ~0U;
3947 for (unsigned j = 0; j < Scale; ++j) {
3948 SDValue Elt = PermMask.getOperand(i+j);
3949 if (Elt.getOpcode() == ISD::UNDEF)
3951 unsigned EltIdx = cast<ConstantSDNode>(Elt)->getZExtValue();
3952 if (StartIdx == ~0U)
3953 StartIdx = EltIdx - (EltIdx % Scale);
3954 if (EltIdx != StartIdx + j)
3957 if (StartIdx == ~0U)
3958 MaskVec.push_back(DAG.getUNDEF(MaskEltVT));
3960 MaskVec.push_back(DAG.getConstant(StartIdx / Scale, MaskEltVT));
3963 V1 = DAG.getNode(ISD::BIT_CONVERT, dl, NewVT, V1);
3964 V2 = DAG.getNode(ISD::BIT_CONVERT, dl, NewVT, V2);
3965 return DAG.getNode(ISD::VECTOR_SHUFFLE, dl, NewVT, V1, V2,
3966 DAG.getBUILD_VECTOR(MaskVT, dl, &MaskVec[0], MaskVec.size()));
3969 /// getVZextMovL - Return a zero-extending vector move low node.
3971 static SDValue getVZextMovL(MVT VT, MVT OpVT,
3972 SDValue SrcOp, SelectionDAG &DAG,
3973 const X86Subtarget *Subtarget, DebugLoc dl) {
3974 if (VT == MVT::v2f64 || VT == MVT::v4f32) {
3975 LoadSDNode *LD = NULL;
3976 if (!isScalarLoadToVector(SrcOp.getNode(), &LD))
3977 LD = dyn_cast<LoadSDNode>(SrcOp);
3979 // movssrr and movsdrr do not clear top bits. Try to use movd, movq
3981 MVT EVT = (OpVT == MVT::v2f64) ? MVT::i64 : MVT::i32;
3982 if ((EVT != MVT::i64 || Subtarget->is64Bit()) &&
3983 SrcOp.getOpcode() == ISD::SCALAR_TO_VECTOR &&
3984 SrcOp.getOperand(0).getOpcode() == ISD::BIT_CONVERT &&
3985 SrcOp.getOperand(0).getOperand(0).getValueType() == EVT) {
3987 OpVT = (OpVT == MVT::v2f64) ? MVT::v2i64 : MVT::v4i32;
3988 return DAG.getNode(ISD::BIT_CONVERT, dl, VT,
3989 DAG.getNode(X86ISD::VZEXT_MOVL, dl, OpVT,
3990 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
3998 return DAG.getNode(ISD::BIT_CONVERT, dl, VT,
3999 DAG.getNode(X86ISD::VZEXT_MOVL, dl, OpVT,
4000 DAG.getNode(ISD::BIT_CONVERT, dl,
4004 /// LowerVECTOR_SHUFFLE_4wide - Handle all 4 wide cases with a number of
4007 LowerVECTOR_SHUFFLE_4wide(SDValue V1, SDValue V2,
4008 SDValue PermMask, MVT VT, SelectionDAG &DAG,
4010 MVT MaskVT = PermMask.getValueType();
4011 MVT MaskEVT = MaskVT.getVectorElementType();
4012 SmallVector<std::pair<int, int>, 8> Locs;
4014 SmallVector<SDValue, 8> Mask1(4, DAG.getUNDEF(MaskEVT));
4017 for (unsigned i = 0; i != 4; ++i) {
4018 SDValue Elt = PermMask.getOperand(i);
4019 if (Elt.getOpcode() == ISD::UNDEF) {
4020 Locs[i] = std::make_pair(-1, -1);
4022 unsigned Val = cast<ConstantSDNode>(Elt)->getZExtValue();
4023 assert(Val < 8 && "Invalid VECTOR_SHUFFLE index!");
4025 Locs[i] = std::make_pair(0, NumLo);
4029 Locs[i] = std::make_pair(1, NumHi);
4031 Mask1[2+NumHi] = Elt;
4037 if (NumLo <= 2 && NumHi <= 2) {
4038 // If no more than two elements come from either vector. This can be
4039 // implemented with two shuffles. First shuffle gather the elements.
4040 // The second shuffle, which takes the first shuffle as both of its
4041 // vector operands, put the elements into the right order.
4042 V1 = DAG.getNode(ISD::VECTOR_SHUFFLE, dl, VT, V1, V2,
4043 DAG.getBUILD_VECTOR(MaskVT, dl, &Mask1[0], Mask1.size()));
4045 SmallVector<SDValue, 8> Mask2(4, DAG.getUNDEF(MaskEVT));
4046 for (unsigned i = 0; i != 4; ++i) {
4047 if (Locs[i].first == -1)
4050 unsigned Idx = (i < 2) ? 0 : 4;
4051 Idx += Locs[i].first * 2 + Locs[i].second;
4052 Mask2[i] = DAG.getConstant(Idx, MaskEVT);
4056 return DAG.getNode(ISD::VECTOR_SHUFFLE, dl, VT, V1, V1,
4057 DAG.getBUILD_VECTOR(MaskVT, dl,
4058 &Mask2[0], Mask2.size()));
4059 } else if (NumLo == 3 || NumHi == 3) {
4060 // Otherwise, we must have three elements from one vector, call it X, and
4061 // one element from the other, call it Y. First, use a shufps to build an
4062 // intermediate vector with the one element from Y and the element from X
4063 // that will be in the same half in the final destination (the indexes don't
4064 // matter). Then, use a shufps to build the final vector, taking the half
4065 // containing the element from Y from the intermediate, and the other half
4068 // Normalize it so the 3 elements come from V1.
4069 PermMask = CommuteVectorShuffleMask(PermMask, DAG, dl);
4073 // Find the element from V2.
4075 for (HiIndex = 0; HiIndex < 3; ++HiIndex) {
4076 SDValue Elt = PermMask.getOperand(HiIndex);
4077 if (Elt.getOpcode() == ISD::UNDEF)
4079 unsigned Val = cast<ConstantSDNode>(Elt)->getZExtValue();
4084 Mask1[0] = PermMask.getOperand(HiIndex);
4085 Mask1[1] = DAG.getUNDEF(MaskEVT);
4086 Mask1[2] = PermMask.getOperand(HiIndex^1);
4087 Mask1[3] = DAG.getUNDEF(MaskEVT);
4088 V2 = DAG.getNode(ISD::VECTOR_SHUFFLE, dl, VT, V1, V2,
4089 DAG.getBUILD_VECTOR(MaskVT, dl, &Mask1[0], 4));
4092 Mask1[0] = PermMask.getOperand(0);
4093 Mask1[1] = PermMask.getOperand(1);
4094 Mask1[2] = DAG.getConstant(HiIndex & 1 ? 6 : 4, MaskEVT);
4095 Mask1[3] = DAG.getConstant(HiIndex & 1 ? 4 : 6, MaskEVT);
4096 return DAG.getNode(ISD::VECTOR_SHUFFLE, dl, VT, V1, V2,
4097 DAG.getBUILD_VECTOR(MaskVT, dl, &Mask1[0], 4));
4099 Mask1[0] = DAG.getConstant(HiIndex & 1 ? 2 : 0, MaskEVT);
4100 Mask1[1] = DAG.getConstant(HiIndex & 1 ? 0 : 2, MaskEVT);
4101 Mask1[2] = PermMask.getOperand(2);
4102 Mask1[3] = PermMask.getOperand(3);
4103 if (Mask1[2].getOpcode() != ISD::UNDEF)
4105 DAG.getConstant(cast<ConstantSDNode>(Mask1[2])->getZExtValue()+4,
4107 if (Mask1[3].getOpcode() != ISD::UNDEF)
4109 DAG.getConstant(cast<ConstantSDNode>(Mask1[3])->getZExtValue()+4,
4111 return DAG.getNode(ISD::VECTOR_SHUFFLE, dl, VT, V2, V1,
4112 DAG.getBUILD_VECTOR(MaskVT, dl, &Mask1[0], 4));
4116 // Break it into (shuffle shuffle_hi, shuffle_lo).
4118 SmallVector<SDValue,8> LoMask(4, DAG.getUNDEF(MaskEVT));
4119 SmallVector<SDValue,8> HiMask(4, DAG.getUNDEF(MaskEVT));
4120 SmallVector<SDValue,8> *MaskPtr = &LoMask;
4121 unsigned MaskIdx = 0;
4124 for (unsigned i = 0; i != 4; ++i) {
4131 SDValue Elt = PermMask.getOperand(i);
4132 if (Elt.getOpcode() == ISD::UNDEF) {
4133 Locs[i] = std::make_pair(-1, -1);
4134 } else if (cast<ConstantSDNode>(Elt)->getZExtValue() < 4) {
4135 Locs[i] = std::make_pair(MaskIdx, LoIdx);
4136 (*MaskPtr)[LoIdx] = Elt;
4139 Locs[i] = std::make_pair(MaskIdx, HiIdx);
4140 (*MaskPtr)[HiIdx] = Elt;
4145 SDValue LoShuffle = DAG.getNode(ISD::VECTOR_SHUFFLE, dl, VT, V1, V2,
4146 DAG.getBUILD_VECTOR(MaskVT, dl,
4147 &LoMask[0], LoMask.size()));
4148 SDValue HiShuffle = DAG.getNode(ISD::VECTOR_SHUFFLE, dl, VT, V1, V2,
4149 DAG.getBUILD_VECTOR(MaskVT, dl,
4150 &HiMask[0], HiMask.size()));
4151 SmallVector<SDValue, 8> MaskOps;
4152 for (unsigned i = 0; i != 4; ++i) {
4153 if (Locs[i].first == -1) {
4154 MaskOps.push_back(DAG.getUNDEF(MaskEVT));
4156 unsigned Idx = Locs[i].first * 4 + Locs[i].second;
4157 MaskOps.push_back(DAG.getConstant(Idx, MaskEVT));
4160 return DAG.getNode(ISD::VECTOR_SHUFFLE, dl, VT, LoShuffle, HiShuffle,
4161 DAG.getBUILD_VECTOR(MaskVT, dl, &MaskOps[0], MaskOps.size()));
4165 X86TargetLowering::LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) {
4166 SDValue V1 = Op.getOperand(0);
4167 SDValue V2 = Op.getOperand(1);
4168 SDValue PermMask = Op.getOperand(2);
4169 MVT VT = Op.getValueType();
4170 DebugLoc dl = Op.getDebugLoc();
4171 unsigned NumElems = PermMask.getNumOperands();
4172 bool isMMX = VT.getSizeInBits() == 64;
4173 bool V1IsUndef = V1.getOpcode() == ISD::UNDEF;
4174 bool V2IsUndef = V2.getOpcode() == ISD::UNDEF;
4175 bool V1IsSplat = false;
4176 bool V2IsSplat = false;
4178 // FIXME: Check for legal shuffle and return?
4180 if (isUndefShuffle(Op.getNode()))
4181 return DAG.getUNDEF(VT);
4183 if (isZeroShuffle(Op.getNode()))
4184 return getZeroVector(VT, Subtarget->hasSSE2(), DAG, dl);
4186 if (isIdentityMask(PermMask.getNode()))
4188 else if (isIdentityMask(PermMask.getNode(), true))
4191 // Canonicalize movddup shuffles.
4192 if (V2IsUndef && Subtarget->hasSSE2() &&
4193 VT.getSizeInBits() == 128 &&
4194 X86::isMOVDDUPMask(PermMask.getNode()))
4195 return CanonicalizeMovddup(Op, V1, PermMask, DAG, Subtarget->hasSSE3());
4197 if (isSplatMask(PermMask.getNode())) {
4198 if (isMMX || NumElems < 4) return Op;
4199 // Promote it to a v4{if}32 splat.
4200 return PromoteSplat(Op, DAG, Subtarget->hasSSE2());
4203 // If the shuffle can be profitably rewritten as a narrower shuffle, then
4205 if (VT == MVT::v8i16 || VT == MVT::v16i8) {
4206 SDValue NewOp= RewriteAsNarrowerShuffle(V1, V2, VT, PermMask, DAG,
4208 if (NewOp.getNode())
4209 return DAG.getNode(ISD::BIT_CONVERT, dl, VT,
4210 LowerVECTOR_SHUFFLE(NewOp, DAG));
4211 } else if ((VT == MVT::v4i32 || (VT == MVT::v4f32 && Subtarget->hasSSE2()))) {
4212 // FIXME: Figure out a cleaner way to do this.
4213 // Try to make use of movq to zero out the top part.
4214 if (ISD::isBuildVectorAllZeros(V2.getNode())) {
4215 SDValue NewOp = RewriteAsNarrowerShuffle(V1, V2, VT, PermMask,
4217 if (NewOp.getNode()) {
4218 SDValue NewV1 = NewOp.getOperand(0);
4219 SDValue NewV2 = NewOp.getOperand(1);
4220 SDValue NewMask = NewOp.getOperand(2);
4221 if (isCommutedMOVL(NewMask.getNode(), true, false)) {
4222 NewOp = CommuteVectorShuffle(NewOp, NewV1, NewV2, NewMask, DAG);
4223 return getVZextMovL(VT, NewOp.getValueType(), NewV2, DAG, Subtarget,
4227 } else if (ISD::isBuildVectorAllZeros(V1.getNode())) {
4228 SDValue NewOp= RewriteAsNarrowerShuffle(V1, V2, VT, PermMask,
4230 if (NewOp.getNode() && X86::isMOVLMask(NewOp.getOperand(2).getNode()))
4231 return getVZextMovL(VT, NewOp.getValueType(), NewOp.getOperand(1),
4232 DAG, Subtarget, dl);
4236 // Check if this can be converted into a logical shift.
4237 bool isLeft = false;
4240 bool isShift = isVectorShift(Op, PermMask, DAG, isLeft, ShVal, ShAmt);
4241 if (isShift && ShVal.hasOneUse()) {
4242 // If the shifted value has multiple uses, it may be cheaper to use
4243 // v_set0 + movlhps or movhlps, etc.
4244 MVT EVT = VT.getVectorElementType();
4245 ShAmt *= EVT.getSizeInBits();
4246 return getVShift(isLeft, VT, ShVal, ShAmt, DAG, *this, dl);
4249 if (X86::isMOVLMask(PermMask.getNode())) {
4252 if (ISD::isBuildVectorAllZeros(V1.getNode()))
4253 return getVZextMovL(VT, VT, V2, DAG, Subtarget, dl);
4258 if (!isMMX && (X86::isMOVSHDUPMask(PermMask.getNode()) ||
4259 X86::isMOVSLDUPMask(PermMask.getNode()) ||
4260 X86::isMOVHLPSMask(PermMask.getNode()) ||
4261 X86::isMOVHPMask(PermMask.getNode()) ||
4262 X86::isMOVLPMask(PermMask.getNode())))
4265 if (ShouldXformToMOVHLPS(PermMask.getNode()) ||
4266 ShouldXformToMOVLP(V1.getNode(), V2.getNode(), PermMask.getNode()))
4267 return CommuteVectorShuffle(Op, V1, V2, PermMask, DAG);
4270 // No better options. Use a vshl / vsrl.
4271 MVT EVT = VT.getVectorElementType();
4272 ShAmt *= EVT.getSizeInBits();
4273 return getVShift(isLeft, VT, ShVal, ShAmt, DAG, *this, dl);
4276 bool Commuted = false;
4277 // FIXME: This should also accept a bitcast of a splat? Be careful, not
4278 // 1,1,1,1 -> v8i16 though.
4279 V1IsSplat = isSplatVector(V1.getNode());
4280 V2IsSplat = isSplatVector(V2.getNode());
4282 // Canonicalize the splat or undef, if present, to be on the RHS.
4283 if ((V1IsSplat || V1IsUndef) && !(V2IsSplat || V2IsUndef)) {
4284 Op = CommuteVectorShuffle(Op, V1, V2, PermMask, DAG);
4285 std::swap(V1IsSplat, V2IsSplat);
4286 std::swap(V1IsUndef, V2IsUndef);
4290 // FIXME: Figure out a cleaner way to do this.
4291 if (isCommutedMOVL(PermMask.getNode(), V2IsSplat, V2IsUndef)) {
4292 if (V2IsUndef) return V1;
4293 Op = CommuteVectorShuffle(Op, V1, V2, PermMask, DAG);
4295 // V2 is a splat, so the mask may be malformed. That is, it may point
4296 // to any V2 element. The instruction selectior won't like this. Get
4297 // a corrected mask and commute to form a proper MOVS{S|D}.
4298 SDValue NewMask = getMOVLMask(NumElems, DAG, dl);
4299 if (NewMask.getNode() != PermMask.getNode())
4300 Op = DAG.getNode(ISD::VECTOR_SHUFFLE, dl, VT, V1, V2, NewMask);
4305 if (X86::isUNPCKL_v_undef_Mask(PermMask.getNode()) ||
4306 X86::isUNPCKH_v_undef_Mask(PermMask.getNode()) ||
4307 X86::isUNPCKLMask(PermMask.getNode()) ||
4308 X86::isUNPCKHMask(PermMask.getNode()))
4312 // Normalize mask so all entries that point to V2 points to its first
4313 // element then try to match unpck{h|l} again. If match, return a
4314 // new vector_shuffle with the corrected mask.
4315 SDValue NewMask = NormalizeMask(PermMask, DAG);
4316 if (NewMask.getNode() != PermMask.getNode()) {
4317 if (X86::isUNPCKLMask(NewMask.getNode(), true)) {
4318 SDValue NewMask = getUnpacklMask(NumElems, DAG, dl);
4319 return DAG.getNode(ISD::VECTOR_SHUFFLE, dl, VT, V1, V2, NewMask);
4320 } else if (X86::isUNPCKHMask(NewMask.getNode(), true)) {
4321 SDValue NewMask = getUnpackhMask(NumElems, DAG, dl);
4322 return DAG.getNode(ISD::VECTOR_SHUFFLE, dl, VT, V1, V2, NewMask);
4327 // Normalize the node to match x86 shuffle ops if needed
4328 if (V2.getOpcode() != ISD::UNDEF && isCommutedSHUFP(PermMask.getNode()))
4329 Op = CommuteVectorShuffle(Op, V1, V2, PermMask, DAG);
4332 // Commute is back and try unpck* again.
4333 Op = CommuteVectorShuffle(Op, V1, V2, PermMask, DAG);
4334 if (X86::isUNPCKL_v_undef_Mask(PermMask.getNode()) ||
4335 X86::isUNPCKH_v_undef_Mask(PermMask.getNode()) ||
4336 X86::isUNPCKLMask(PermMask.getNode()) ||
4337 X86::isUNPCKHMask(PermMask.getNode()))
4341 // FIXME: for mmx, bitcast v2i32 to v4i16 for shuffle.
4342 // Try PSHUF* first, then SHUFP*.
4343 // MMX doesn't have PSHUFD but it does have PSHUFW. While it's theoretically
4344 // possible to shuffle a v2i32 using PSHUFW, that's not yet implemented.
4345 if (isMMX && NumElems == 4 && X86::isPSHUFDMask(PermMask.getNode())) {
4346 if (V2.getOpcode() != ISD::UNDEF)
4347 return DAG.getNode(ISD::VECTOR_SHUFFLE, dl, VT, V1,
4348 DAG.getUNDEF(VT), PermMask);
4353 if (Subtarget->hasSSE2() &&
4354 (X86::isPSHUFDMask(PermMask.getNode()) ||
4355 X86::isPSHUFHWMask(PermMask.getNode()) ||
4356 X86::isPSHUFLWMask(PermMask.getNode()))) {
4358 if (VT == MVT::v4f32) {
4360 Op = DAG.getNode(ISD::VECTOR_SHUFFLE, dl, RVT,
4361 DAG.getNode(ISD::BIT_CONVERT, dl, RVT, V1),
4362 DAG.getUNDEF(RVT), PermMask);
4363 } else if (V2.getOpcode() != ISD::UNDEF)
4364 Op = DAG.getNode(ISD::VECTOR_SHUFFLE, dl, RVT, V1,
4365 DAG.getUNDEF(RVT), PermMask);
4367 Op = DAG.getNode(ISD::BIT_CONVERT, dl, VT, Op);
4371 // Binary or unary shufps.
4372 if (X86::isSHUFPMask(PermMask.getNode()) ||
4373 (V2.getOpcode() == ISD::UNDEF && X86::isPSHUFDMask(PermMask.getNode())))
4377 // Handle v8i16 specifically since SSE can do byte extraction and insertion.
4378 if (VT == MVT::v8i16) {
4379 SDValue NewOp = LowerVECTOR_SHUFFLEv8i16(V1, V2, PermMask, DAG, *this, dl);
4380 if (NewOp.getNode())
4384 if (VT == MVT::v16i8) {
4385 SDValue NewOp = LowerVECTOR_SHUFFLEv16i8(V1, V2, PermMask, DAG, *this, dl);
4386 if (NewOp.getNode())
4390 // Handle all 4 wide cases with a number of shuffles except for MMX.
4391 if (NumElems == 4 && !isMMX)
4392 return LowerVECTOR_SHUFFLE_4wide(V1, V2, PermMask, VT, DAG, dl);
4398 X86TargetLowering::LowerEXTRACT_VECTOR_ELT_SSE4(SDValue Op,
4399 SelectionDAG &DAG) {
4400 MVT VT = Op.getValueType();
4401 DebugLoc dl = Op.getDebugLoc();
4402 if (VT.getSizeInBits() == 8) {
4403 SDValue Extract = DAG.getNode(X86ISD::PEXTRB, dl, MVT::i32,
4404 Op.getOperand(0), Op.getOperand(1));
4405 SDValue Assert = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Extract,
4406 DAG.getValueType(VT));
4407 return DAG.getNode(ISD::TRUNCATE, dl, VT, Assert);
4408 } else if (VT.getSizeInBits() == 16) {
4409 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
4410 // If Idx is 0, it's cheaper to do a move instead of a pextrw.
4412 return DAG.getNode(ISD::TRUNCATE, dl, MVT::i16,
4413 DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32,
4414 DAG.getNode(ISD::BIT_CONVERT, dl,
4418 SDValue Extract = DAG.getNode(X86ISD::PEXTRW, dl, MVT::i32,
4419 Op.getOperand(0), Op.getOperand(1));
4420 SDValue Assert = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Extract,
4421 DAG.getValueType(VT));
4422 return DAG.getNode(ISD::TRUNCATE, dl, VT, Assert);
4423 } else if (VT == MVT::f32) {
4424 // EXTRACTPS outputs to a GPR32 register which will require a movd to copy
4425 // the result back to FR32 register. It's only worth matching if the
4426 // result has a single use which is a store or a bitcast to i32. And in
4427 // the case of a store, it's not worth it if the index is a constant 0,
4428 // because a MOVSSmr can be used instead, which is smaller and faster.
4429 if (!Op.hasOneUse())
4431 SDNode *User = *Op.getNode()->use_begin();
4432 if ((User->getOpcode() != ISD::STORE ||
4433 (isa<ConstantSDNode>(Op.getOperand(1)) &&
4434 cast<ConstantSDNode>(Op.getOperand(1))->isNullValue())) &&
4435 (User->getOpcode() != ISD::BIT_CONVERT ||
4436 User->getValueType(0) != MVT::i32))
4438 SDValue Extract = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32,
4439 DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v4i32,
4442 return DAG.getNode(ISD::BIT_CONVERT, dl, MVT::f32, Extract);
4443 } else if (VT == MVT::i32) {
4444 // ExtractPS works with constant index.
4445 if (isa<ConstantSDNode>(Op.getOperand(1)))
4453 X86TargetLowering::LowerEXTRACT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) {
4454 if (!isa<ConstantSDNode>(Op.getOperand(1)))
4457 if (Subtarget->hasSSE41()) {
4458 SDValue Res = LowerEXTRACT_VECTOR_ELT_SSE4(Op, DAG);
4463 MVT VT = Op.getValueType();
4464 DebugLoc dl = Op.getDebugLoc();
4465 // TODO: handle v16i8.
4466 if (VT.getSizeInBits() == 16) {
4467 SDValue Vec = Op.getOperand(0);
4468 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
4470 return DAG.getNode(ISD::TRUNCATE, dl, MVT::i16,
4471 DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32,
4472 DAG.getNode(ISD::BIT_CONVERT, dl,
4475 // Transform it so it match pextrw which produces a 32-bit result.
4476 MVT EVT = (MVT::SimpleValueType)(VT.getSimpleVT()+1);
4477 SDValue Extract = DAG.getNode(X86ISD::PEXTRW, dl, EVT,
4478 Op.getOperand(0), Op.getOperand(1));
4479 SDValue Assert = DAG.getNode(ISD::AssertZext, dl, EVT, Extract,
4480 DAG.getValueType(VT));
4481 return DAG.getNode(ISD::TRUNCATE, dl, VT, Assert);
4482 } else if (VT.getSizeInBits() == 32) {
4483 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
4486 // SHUFPS the element to the lowest double word, then movss.
4487 MVT MaskVT = MVT::getIntVectorWithNumElements(4);
4488 SmallVector<SDValue, 8> IdxVec;
4490 push_back(DAG.getConstant(Idx, MaskVT.getVectorElementType()));
4492 push_back(DAG.getUNDEF(MaskVT.getVectorElementType()));
4494 push_back(DAG.getUNDEF(MaskVT.getVectorElementType()));
4496 push_back(DAG.getUNDEF(MaskVT.getVectorElementType()));
4497 SDValue Mask = DAG.getBUILD_VECTOR(MaskVT, dl, &IdxVec[0], IdxVec.size());
4498 SDValue Vec = Op.getOperand(0);
4499 Vec = DAG.getNode(ISD::VECTOR_SHUFFLE, dl, Vec.getValueType(),
4500 Vec, DAG.getUNDEF(Vec.getValueType()), Mask);
4501 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, VT, Vec,
4502 DAG.getIntPtrConstant(0));
4503 } else if (VT.getSizeInBits() == 64) {
4504 // FIXME: .td only matches this for <2 x f64>, not <2 x i64> on 32b
4505 // FIXME: seems like this should be unnecessary if mov{h,l}pd were taught
4506 // to match extract_elt for f64.
4507 unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
4511 // UNPCKHPD the element to the lowest double word, then movsd.
4512 // Note if the lower 64 bits of the result of the UNPCKHPD is then stored
4513 // to a f64mem, the whole operation is folded into a single MOVHPDmr.
4514 MVT MaskVT = MVT::getIntVectorWithNumElements(2);
4515 SmallVector<SDValue, 8> IdxVec;
4516 IdxVec.push_back(DAG.getConstant(1, MaskVT.getVectorElementType()));
4518 push_back(DAG.getUNDEF(MaskVT.getVectorElementType()));
4519 SDValue Mask = DAG.getBUILD_VECTOR(MaskVT, dl, &IdxVec[0], IdxVec.size());
4520 SDValue Vec = Op.getOperand(0);
4521 Vec = DAG.getNode(ISD::VECTOR_SHUFFLE, dl, Vec.getValueType(),
4522 Vec, DAG.getUNDEF(Vec.getValueType()),
4524 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, VT, Vec,
4525 DAG.getIntPtrConstant(0));
4532 X86TargetLowering::LowerINSERT_VECTOR_ELT_SSE4(SDValue Op, SelectionDAG &DAG){
4533 MVT VT = Op.getValueType();
4534 MVT EVT = VT.getVectorElementType();
4535 DebugLoc dl = Op.getDebugLoc();
4537 SDValue N0 = Op.getOperand(0);
4538 SDValue N1 = Op.getOperand(1);
4539 SDValue N2 = Op.getOperand(2);
4541 if ((EVT.getSizeInBits() == 8 || EVT.getSizeInBits() == 16) &&
4542 isa<ConstantSDNode>(N2)) {
4543 unsigned Opc = (EVT.getSizeInBits() == 8) ? X86ISD::PINSRB
4545 // Transform it so it match pinsr{b,w} which expects a GR32 as its second
4547 if (N1.getValueType() != MVT::i32)
4548 N1 = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, N1);
4549 if (N2.getValueType() != MVT::i32)
4550 N2 = DAG.getIntPtrConstant(cast<ConstantSDNode>(N2)->getZExtValue());
4551 return DAG.getNode(Opc, dl, VT, N0, N1, N2);
4552 } else if (EVT == MVT::f32 && isa<ConstantSDNode>(N2)) {
4553 // Bits [7:6] of the constant are the source select. This will always be
4554 // zero here. The DAG Combiner may combine an extract_elt index into these
4555 // bits. For example (insert (extract, 3), 2) could be matched by putting
4556 // the '3' into bits [7:6] of X86ISD::INSERTPS.
4557 // Bits [5:4] of the constant are the destination select. This is the
4558 // value of the incoming immediate.
4559 // Bits [3:0] of the constant are the zero mask. The DAG Combiner may
4560 // combine either bitwise AND or insert of float 0.0 to set these bits.
4561 N2 = DAG.getIntPtrConstant(cast<ConstantSDNode>(N2)->getZExtValue() << 4);
4562 return DAG.getNode(X86ISD::INSERTPS, dl, VT, N0, N1, N2);
4563 } else if (EVT == MVT::i32) {
4564 // InsertPS works with constant index.
4565 if (isa<ConstantSDNode>(N2))
4572 X86TargetLowering::LowerINSERT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) {
4573 MVT VT = Op.getValueType();
4574 MVT EVT = VT.getVectorElementType();
4576 if (Subtarget->hasSSE41())
4577 return LowerINSERT_VECTOR_ELT_SSE4(Op, DAG);
4582 DebugLoc dl = Op.getDebugLoc();
4583 SDValue N0 = Op.getOperand(0);
4584 SDValue N1 = Op.getOperand(1);
4585 SDValue N2 = Op.getOperand(2);
4587 if (EVT.getSizeInBits() == 16) {
4588 // Transform it so it match pinsrw which expects a 16-bit value in a GR32
4589 // as its second argument.
4590 if (N1.getValueType() != MVT::i32)
4591 N1 = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, N1);
4592 if (N2.getValueType() != MVT::i32)
4593 N2 = DAG.getIntPtrConstant(cast<ConstantSDNode>(N2)->getZExtValue());
4594 return DAG.getNode(X86ISD::PINSRW, dl, VT, N0, N1, N2);
4600 X86TargetLowering::LowerSCALAR_TO_VECTOR(SDValue Op, SelectionDAG &DAG) {
4601 DebugLoc dl = Op.getDebugLoc();
4602 if (Op.getValueType() == MVT::v2f32)
4603 return DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v2f32,
4604 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2i32,
4605 DAG.getNode(ISD::BIT_CONVERT, dl, MVT::i32,
4606 Op.getOperand(0))));
4608 SDValue AnyExt = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, Op.getOperand(0));
4609 MVT VT = MVT::v2i32;
4610 switch (Op.getValueType().getSimpleVT()) {
4617 return DAG.getNode(ISD::BIT_CONVERT, dl, Op.getValueType(),
4618 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, AnyExt));
4621 // ConstantPool, JumpTable, GlobalAddress, and ExternalSymbol are lowered as
4622 // their target countpart wrapped in the X86ISD::Wrapper node. Suppose N is
4623 // one of the above mentioned nodes. It has to be wrapped because otherwise
4624 // Select(N) returns N. So the raw TargetGlobalAddress nodes, etc. can only
4625 // be used to form addressing mode. These wrapped nodes will be selected
4628 X86TargetLowering::LowerConstantPool(SDValue Op, SelectionDAG &DAG) {
4629 ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
4630 // FIXME there isn't really any debug info here, should come from the parent
4631 DebugLoc dl = CP->getDebugLoc();
4632 SDValue Result = DAG.getTargetConstantPool(CP->getConstVal(),
4634 CP->getAlignment());
4635 Result = DAG.getNode(X86ISD::Wrapper, dl, getPointerTy(), Result);
4636 // With PIC, the address is actually $g + Offset.
4637 if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
4638 !Subtarget->isPICStyleRIPRel()) {
4639 Result = DAG.getNode(ISD::ADD, dl, getPointerTy(),
4640 DAG.getNode(X86ISD::GlobalBaseReg,
4641 DebugLoc::getUnknownLoc(),
4650 X86TargetLowering::LowerGlobalAddress(const GlobalValue *GV, DebugLoc dl,
4652 SelectionDAG &DAG) const {
4653 bool IsPic = getTargetMachine().getRelocationModel() == Reloc::PIC_;
4654 bool ExtraLoadRequired =
4655 Subtarget->GVRequiresExtraLoad(GV, getTargetMachine(), false);
4657 // Create the TargetGlobalAddress node, folding in the constant
4658 // offset if it is legal.
4660 if (!IsPic && !ExtraLoadRequired && isInt32(Offset)) {
4661 Result = DAG.getTargetGlobalAddress(GV, getPointerTy(), Offset);
4664 Result = DAG.getTargetGlobalAddress(GV, getPointerTy(), 0);
4665 Result = DAG.getNode(X86ISD::Wrapper, dl, getPointerTy(), Result);
4667 // With PIC, the address is actually $g + Offset.
4668 if (IsPic && !Subtarget->isPICStyleRIPRel()) {
4669 Result = DAG.getNode(ISD::ADD, dl, getPointerTy(),
4670 DAG.getNode(X86ISD::GlobalBaseReg, dl, getPointerTy()),
4674 // For Darwin & Mingw32, external and weak symbols are indirect, so we want to
4675 // load the value at address GV, not the value of GV itself. This means that
4676 // the GlobalAddress must be in the base or index register of the address, not
4677 // the GV offset field. Platform check is inside GVRequiresExtraLoad() call
4678 // The same applies for external symbols during PIC codegen
4679 if (ExtraLoadRequired)
4680 Result = DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(), Result,
4681 PseudoSourceValue::getGOT(), 0);
4683 // If there was a non-zero offset that we didn't fold, create an explicit
4686 Result = DAG.getNode(ISD::ADD, dl, getPointerTy(), Result,
4687 DAG.getConstant(Offset, getPointerTy()));
4693 X86TargetLowering::LowerGlobalAddress(SDValue Op, SelectionDAG &DAG) {
4694 const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
4695 int64_t Offset = cast<GlobalAddressSDNode>(Op)->getOffset();
4696 return LowerGlobalAddress(GV, Op.getDebugLoc(), Offset, DAG);
4699 // Lower ISD::GlobalTLSAddress using the "general dynamic" model, 32 bit
4701 LowerToTLSGeneralDynamicModel32(GlobalAddressSDNode *GA, SelectionDAG &DAG,
4704 DebugLoc dl = GA->getDebugLoc(); // ? function entry point might be better
4705 SDValue Chain = DAG.getCopyToReg(DAG.getEntryNode(), dl, X86::EBX,
4706 DAG.getNode(X86ISD::GlobalBaseReg,
4707 DebugLoc::getUnknownLoc(),
4709 InFlag = Chain.getValue(1);
4711 // emit leal symbol@TLSGD(,%ebx,1), %eax
4712 SDVTList NodeTys = DAG.getVTList(PtrVT, MVT::Other, MVT::Flag);
4713 SDValue TGA = DAG.getTargetGlobalAddress(GA->getGlobal(),
4714 GA->getValueType(0),
4716 SDValue Ops[] = { Chain, TGA, InFlag };
4717 SDValue Result = DAG.getNode(X86ISD::TLSADDR, dl, NodeTys, Ops, 3);
4718 InFlag = Result.getValue(2);
4719 Chain = Result.getValue(1);
4721 // call ___tls_get_addr. This function receives its argument in
4722 // the register EAX.
4723 Chain = DAG.getCopyToReg(Chain, dl, X86::EAX, Result, InFlag);
4724 InFlag = Chain.getValue(1);
4726 NodeTys = DAG.getVTList(MVT::Other, MVT::Flag);
4727 SDValue Ops1[] = { Chain,
4728 DAG.getTargetExternalSymbol("___tls_get_addr",
4730 DAG.getRegister(X86::EAX, PtrVT),
4731 DAG.getRegister(X86::EBX, PtrVT),
4733 Chain = DAG.getNode(X86ISD::CALL, dl, NodeTys, Ops1, 5);
4734 InFlag = Chain.getValue(1);
4736 return DAG.getCopyFromReg(Chain, dl, X86::EAX, PtrVT, InFlag);
4739 // Lower ISD::GlobalTLSAddress using the "general dynamic" model, 64 bit
4741 LowerToTLSGeneralDynamicModel64(GlobalAddressSDNode *GA, SelectionDAG &DAG,
4743 SDValue InFlag, Chain;
4744 DebugLoc dl = GA->getDebugLoc(); // ? function entry point might be better
4746 // emit leaq symbol@TLSGD(%rip), %rdi
4747 SDVTList NodeTys = DAG.getVTList(PtrVT, MVT::Other, MVT::Flag);
4748 SDValue TGA = DAG.getTargetGlobalAddress(GA->getGlobal(),
4749 GA->getValueType(0),
4751 SDValue Ops[] = { DAG.getEntryNode(), TGA};
4752 SDValue Result = DAG.getNode(X86ISD::TLSADDR, dl, NodeTys, Ops, 2);
4753 Chain = Result.getValue(1);
4754 InFlag = Result.getValue(2);
4756 // call __tls_get_addr. This function receives its argument in
4757 // the register RDI.
4758 Chain = DAG.getCopyToReg(Chain, dl, X86::RDI, Result, InFlag);
4759 InFlag = Chain.getValue(1);
4761 NodeTys = DAG.getVTList(MVT::Other, MVT::Flag);
4762 SDValue Ops1[] = { Chain,
4763 DAG.getTargetExternalSymbol("__tls_get_addr",
4765 DAG.getRegister(X86::RDI, PtrVT),
4767 Chain = DAG.getNode(X86ISD::CALL, dl, NodeTys, Ops1, 4);
4768 InFlag = Chain.getValue(1);
4770 return DAG.getCopyFromReg(Chain, dl, X86::RAX, PtrVT, InFlag);
4773 // Lower ISD::GlobalTLSAddress using the "initial exec" (for no-pic) or
4774 // "local exec" model.
4775 static SDValue LowerToTLSExecModel(GlobalAddressSDNode *GA, SelectionDAG &DAG,
4777 DebugLoc dl = GA->getDebugLoc();
4778 // Get the Thread Pointer
4779 SDValue ThreadPointer = DAG.getNode(X86ISD::THREAD_POINTER,
4780 DebugLoc::getUnknownLoc(), PtrVT);
4781 // emit "addl x@ntpoff,%eax" (local exec) or "addl x@indntpoff,%eax" (initial
4783 SDValue TGA = DAG.getTargetGlobalAddress(GA->getGlobal(),
4784 GA->getValueType(0),
4786 SDValue Offset = DAG.getNode(X86ISD::Wrapper, dl, PtrVT, TGA);
4788 if (GA->getGlobal()->isDeclaration()) // initial exec TLS model
4789 Offset = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), Offset,
4790 PseudoSourceValue::getGOT(), 0);
4792 // The address of the thread local variable is the add of the thread
4793 // pointer with the offset of the variable.
4794 return DAG.getNode(ISD::ADD, dl, PtrVT, ThreadPointer, Offset);
4798 X86TargetLowering::LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) {
4799 // TODO: implement the "local dynamic" model
4800 // TODO: implement the "initial exec"model for pic executables
4801 assert(Subtarget->isTargetELF() &&
4802 "TLS not implemented for non-ELF targets");
4803 GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op);
4804 // If the relocation model is PIC, use the "General Dynamic" TLS Model,
4805 // otherwise use the "Local Exec"TLS Model
4806 if (Subtarget->is64Bit()) {
4807 return LowerToTLSGeneralDynamicModel64(GA, DAG, getPointerTy());
4809 if (getTargetMachine().getRelocationModel() == Reloc::PIC_)
4810 return LowerToTLSGeneralDynamicModel32(GA, DAG, getPointerTy());
4812 return LowerToTLSExecModel(GA, DAG, getPointerTy());
4817 X86TargetLowering::LowerExternalSymbol(SDValue Op, SelectionDAG &DAG) {
4818 // FIXME there isn't really any debug info here
4819 DebugLoc dl = Op.getDebugLoc();
4820 const char *Sym = cast<ExternalSymbolSDNode>(Op)->getSymbol();
4821 SDValue Result = DAG.getTargetExternalSymbol(Sym, getPointerTy());
4822 Result = DAG.getNode(X86ISD::Wrapper, dl, getPointerTy(), Result);
4823 // With PIC, the address is actually $g + Offset.
4824 if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
4825 !Subtarget->isPICStyleRIPRel()) {
4826 Result = DAG.getNode(ISD::ADD, dl, getPointerTy(),
4827 DAG.getNode(X86ISD::GlobalBaseReg,
4828 DebugLoc::getUnknownLoc(),
4836 SDValue X86TargetLowering::LowerJumpTable(SDValue Op, SelectionDAG &DAG) {
4837 JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
4838 // FIXME there isn't really any debug into here
4839 DebugLoc dl = JT->getDebugLoc();
4840 SDValue Result = DAG.getTargetJumpTable(JT->getIndex(), getPointerTy());
4841 Result = DAG.getNode(X86ISD::Wrapper, dl, getPointerTy(), Result);
4842 // With PIC, the address is actually $g + Offset.
4843 if (getTargetMachine().getRelocationModel() == Reloc::PIC_ &&
4844 !Subtarget->isPICStyleRIPRel()) {
4845 Result = DAG.getNode(ISD::ADD, dl, getPointerTy(),
4846 DAG.getNode(X86ISD::GlobalBaseReg,
4847 DebugLoc::getUnknownLoc(),
4855 /// LowerShift - Lower SRA_PARTS and friends, which return two i32 values and
4856 /// take a 2 x i32 value to shift plus a shift amount.
4857 SDValue X86TargetLowering::LowerShift(SDValue Op, SelectionDAG &DAG) {
4858 assert(Op.getNumOperands() == 3 && "Not a double-shift!");
4859 MVT VT = Op.getValueType();
4860 unsigned VTBits = VT.getSizeInBits();
4861 DebugLoc dl = Op.getDebugLoc();
4862 bool isSRA = Op.getOpcode() == ISD::SRA_PARTS;
4863 SDValue ShOpLo = Op.getOperand(0);
4864 SDValue ShOpHi = Op.getOperand(1);
4865 SDValue ShAmt = Op.getOperand(2);
4866 SDValue Tmp1 = isSRA ?
4867 DAG.getNode(ISD::SRA, dl, VT, ShOpHi,
4868 DAG.getConstant(VTBits - 1, MVT::i8)) :
4869 DAG.getConstant(0, VT);
4872 if (Op.getOpcode() == ISD::SHL_PARTS) {
4873 Tmp2 = DAG.getNode(X86ISD::SHLD, dl, VT, ShOpHi, ShOpLo, ShAmt);
4874 Tmp3 = DAG.getNode(ISD::SHL, dl, VT, ShOpLo, ShAmt);
4876 Tmp2 = DAG.getNode(X86ISD::SHRD, dl, VT, ShOpLo, ShOpHi, ShAmt);
4877 Tmp3 = DAG.getNode(isSRA ? ISD::SRA : ISD::SRL, dl, VT, ShOpHi, ShAmt);
4880 SDValue AndNode = DAG.getNode(ISD::AND, dl, MVT::i8, ShAmt,
4881 DAG.getConstant(VTBits, MVT::i8));
4882 SDValue Cond = DAG.getNode(X86ISD::CMP, dl, VT,
4883 AndNode, DAG.getConstant(0, MVT::i8));
4886 SDValue CC = DAG.getConstant(X86::COND_NE, MVT::i8);
4887 SDValue Ops0[4] = { Tmp2, Tmp3, CC, Cond };
4888 SDValue Ops1[4] = { Tmp3, Tmp1, CC, Cond };
4890 if (Op.getOpcode() == ISD::SHL_PARTS) {
4891 Hi = DAG.getNode(X86ISD::CMOV, dl, VT, Ops0, 4);
4892 Lo = DAG.getNode(X86ISD::CMOV, dl, VT, Ops1, 4);
4894 Lo = DAG.getNode(X86ISD::CMOV, dl, VT, Ops0, 4);
4895 Hi = DAG.getNode(X86ISD::CMOV, dl, VT, Ops1, 4);
4898 SDValue Ops[2] = { Lo, Hi };
4899 return DAG.getMergeValues(Ops, 2, dl);
4902 SDValue X86TargetLowering::LowerSINT_TO_FP(SDValue Op, SelectionDAG &DAG) {
4903 MVT SrcVT = Op.getOperand(0).getValueType();
4904 assert(SrcVT.getSimpleVT() <= MVT::i64 && SrcVT.getSimpleVT() >= MVT::i16 &&
4905 "Unknown SINT_TO_FP to lower!");
4907 // These are really Legal; caller falls through into that case.
4908 if (SrcVT == MVT::i32 && isScalarFPTypeInSSEReg(Op.getValueType()))
4910 if (SrcVT == MVT::i64 && Op.getValueType() != MVT::f80 &&
4911 Subtarget->is64Bit())
4914 DebugLoc dl = Op.getDebugLoc();
4915 unsigned Size = SrcVT.getSizeInBits()/8;
4916 MachineFunction &MF = DAG.getMachineFunction();
4917 int SSFI = MF.getFrameInfo()->CreateStackObject(Size, Size);
4918 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
4919 SDValue Chain = DAG.getStore(DAG.getEntryNode(), dl, Op.getOperand(0),
4921 PseudoSourceValue::getFixedStack(SSFI), 0);
4925 bool useSSE = isScalarFPTypeInSSEReg(Op.getValueType());
4927 Tys = DAG.getVTList(MVT::f64, MVT::Other, MVT::Flag);
4929 Tys = DAG.getVTList(Op.getValueType(), MVT::Other);
4930 SmallVector<SDValue, 8> Ops;
4931 Ops.push_back(Chain);
4932 Ops.push_back(StackSlot);
4933 Ops.push_back(DAG.getValueType(SrcVT));
4934 SDValue Result = DAG.getNode(useSSE ? X86ISD::FILD_FLAG : X86ISD::FILD, dl,
4935 Tys, &Ops[0], Ops.size());
4938 Chain = Result.getValue(1);
4939 SDValue InFlag = Result.getValue(2);
4941 // FIXME: Currently the FST is flagged to the FILD_FLAG. This
4942 // shouldn't be necessary except that RFP cannot be live across
4943 // multiple blocks. When stackifier is fixed, they can be uncoupled.
4944 MachineFunction &MF = DAG.getMachineFunction();
4945 int SSFI = MF.getFrameInfo()->CreateStackObject(8, 8);
4946 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
4947 Tys = DAG.getVTList(MVT::Other);
4948 SmallVector<SDValue, 8> Ops;
4949 Ops.push_back(Chain);
4950 Ops.push_back(Result);
4951 Ops.push_back(StackSlot);
4952 Ops.push_back(DAG.getValueType(Op.getValueType()));
4953 Ops.push_back(InFlag);
4954 Chain = DAG.getNode(X86ISD::FST, dl, Tys, &Ops[0], Ops.size());
4955 Result = DAG.getLoad(Op.getValueType(), dl, Chain, StackSlot,
4956 PseudoSourceValue::getFixedStack(SSFI), 0);
4962 // LowerUINT_TO_FP_i64 - 64-bit unsigned integer to double expansion.
4963 SDValue X86TargetLowering::LowerUINT_TO_FP_i64(SDValue Op, SelectionDAG &DAG) {
4964 // This algorithm is not obvious. Here it is in C code, more or less:
4966 double uint64_to_double( uint32_t hi, uint32_t lo ) {
4967 static const __m128i exp = { 0x4330000045300000ULL, 0 };
4968 static const __m128d bias = { 0x1.0p84, 0x1.0p52 };
4970 // Copy ints to xmm registers.
4971 __m128i xh = _mm_cvtsi32_si128( hi );
4972 __m128i xl = _mm_cvtsi32_si128( lo );
4974 // Combine into low half of a single xmm register.
4975 __m128i x = _mm_unpacklo_epi32( xh, xl );
4979 // Merge in appropriate exponents to give the integer bits the right
4981 x = _mm_unpacklo_epi32( x, exp );
4983 // Subtract away the biases to deal with the IEEE-754 double precision
4985 d = _mm_sub_pd( (__m128d) x, bias );
4987 // All conversions up to here are exact. The correctly rounded result is
4988 // calculated using the current rounding mode using the following
4990 d = _mm_add_sd( d, _mm_unpackhi_pd( d, d ) );
4991 _mm_store_sd( &sd, d ); // Because we are returning doubles in XMM, this
4992 // store doesn't really need to be here (except
4993 // maybe to zero the other double)
4998 DebugLoc dl = Op.getDebugLoc();
5000 // Build some magic constants.
5001 std::vector<Constant*> CV0;
5002 CV0.push_back(ConstantInt::get(APInt(32, 0x45300000)));
5003 CV0.push_back(ConstantInt::get(APInt(32, 0x43300000)));
5004 CV0.push_back(ConstantInt::get(APInt(32, 0)));
5005 CV0.push_back(ConstantInt::get(APInt(32, 0)));
5006 Constant *C0 = ConstantVector::get(CV0);
5007 SDValue CPIdx0 = DAG.getConstantPool(C0, getPointerTy(), 4);
5009 std::vector<Constant*> CV1;
5010 CV1.push_back(ConstantFP::get(APFloat(APInt(64, 0x4530000000000000ULL))));
5011 CV1.push_back(ConstantFP::get(APFloat(APInt(64, 0x4330000000000000ULL))));
5012 Constant *C1 = ConstantVector::get(CV1);
5013 SDValue CPIdx1 = DAG.getConstantPool(C1, getPointerTy(), 4);
5015 SmallVector<SDValue, 4> MaskVec;
5016 MaskVec.push_back(DAG.getConstant(0, MVT::i32));
5017 MaskVec.push_back(DAG.getConstant(4, MVT::i32));
5018 MaskVec.push_back(DAG.getConstant(1, MVT::i32));
5019 MaskVec.push_back(DAG.getConstant(5, MVT::i32));
5020 SDValue UnpcklMask = DAG.getBUILD_VECTOR(MVT::v4i32, dl,
5021 &MaskVec[0], MaskVec.size());
5022 SmallVector<SDValue, 4> MaskVec2;
5023 MaskVec2.push_back(DAG.getConstant(1, MVT::i32));
5024 MaskVec2.push_back(DAG.getConstant(0, MVT::i32));
5025 SDValue ShufMask = DAG.getBUILD_VECTOR(MVT::v2i32, dl,
5026 &MaskVec2[0], MaskVec2.size());
5028 SDValue XR1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32,
5029 DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
5031 DAG.getIntPtrConstant(1)));
5032 SDValue XR2 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32,
5033 DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
5035 DAG.getIntPtrConstant(0)));
5036 SDValue Unpck1 = DAG.getNode(ISD::VECTOR_SHUFFLE, dl, MVT::v4i32,
5037 XR1, XR2, UnpcklMask);
5038 SDValue CLod0 = DAG.getLoad(MVT::v4i32, dl, DAG.getEntryNode(), CPIdx0,
5039 PseudoSourceValue::getConstantPool(), 0,
5041 SDValue Unpck2 = DAG.getNode(ISD::VECTOR_SHUFFLE, dl, MVT::v4i32,
5042 Unpck1, CLod0, UnpcklMask);
5043 SDValue XR2F = DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v2f64, Unpck2);
5044 SDValue CLod1 = DAG.getLoad(MVT::v2f64, dl, CLod0.getValue(1), CPIdx1,
5045 PseudoSourceValue::getConstantPool(), 0,
5047 SDValue Sub = DAG.getNode(ISD::FSUB, dl, MVT::v2f64, XR2F, CLod1);
5049 // Add the halves; easiest way is to swap them into another reg first.
5050 SDValue Shuf = DAG.getNode(ISD::VECTOR_SHUFFLE, dl, MVT::v2f64,
5051 Sub, Sub, ShufMask);
5052 SDValue Add = DAG.getNode(ISD::FADD, dl, MVT::v2f64, Shuf, Sub);
5053 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Add,
5054 DAG.getIntPtrConstant(0));
5057 // LowerUINT_TO_FP_i32 - 32-bit unsigned integer to float expansion.
5058 SDValue X86TargetLowering::LowerUINT_TO_FP_i32(SDValue Op, SelectionDAG &DAG) {
5059 DebugLoc dl = Op.getDebugLoc();
5060 // FP constant to bias correct the final result.
5061 SDValue Bias = DAG.getConstantFP(BitsToDouble(0x4330000000000000ULL),
5064 // Load the 32-bit value into an XMM register.
5065 SDValue Load = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v4i32,
5066 DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
5068 DAG.getIntPtrConstant(0)));
5070 Load = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64,
5071 DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v2f64, Load),
5072 DAG.getIntPtrConstant(0));
5074 // Or the load with the bias.
5075 SDValue Or = DAG.getNode(ISD::OR, dl, MVT::v2i64,
5076 DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v2i64,
5077 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
5079 DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v2i64,
5080 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl,
5081 MVT::v2f64, Bias)));
5082 Or = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64,
5083 DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v2f64, Or),
5084 DAG.getIntPtrConstant(0));
5086 // Subtract the bias.
5087 SDValue Sub = DAG.getNode(ISD::FSUB, dl, MVT::f64, Or, Bias);
5089 // Handle final rounding.
5090 MVT DestVT = Op.getValueType();
5092 if (DestVT.bitsLT(MVT::f64)) {
5093 return DAG.getNode(ISD::FP_ROUND, dl, DestVT, Sub,
5094 DAG.getIntPtrConstant(0));
5095 } else if (DestVT.bitsGT(MVT::f64)) {
5096 return DAG.getNode(ISD::FP_EXTEND, dl, DestVT, Sub);
5099 // Handle final rounding.
5103 SDValue X86TargetLowering::LowerUINT_TO_FP(SDValue Op, SelectionDAG &DAG) {
5104 SDValue N0 = Op.getOperand(0);
5105 DebugLoc dl = Op.getDebugLoc();
5107 // Now not UINT_TO_FP is legal (it's marked custom), dag combiner won't
5108 // optimize it to a SINT_TO_FP when the sign bit is known zero. Perform
5109 // the optimization here.
5110 if (DAG.SignBitIsZero(N0))
5111 return DAG.getNode(ISD::SINT_TO_FP, dl, Op.getValueType(), N0);
5113 MVT SrcVT = N0.getValueType();
5114 if (SrcVT == MVT::i64) {
5115 // We only handle SSE2 f64 target here; caller can handle the rest.
5116 if (Op.getValueType() != MVT::f64 || !X86ScalarSSEf64)
5119 return LowerUINT_TO_FP_i64(Op, DAG);
5120 } else if (SrcVT == MVT::i32) {
5121 return LowerUINT_TO_FP_i32(Op, DAG);
5124 assert(0 && "Unknown UINT_TO_FP to lower!");
5128 std::pair<SDValue,SDValue> X86TargetLowering::
5129 FP_TO_SINTHelper(SDValue Op, SelectionDAG &DAG) {
5130 DebugLoc dl = Op.getDebugLoc();
5131 assert(Op.getValueType().getSimpleVT() <= MVT::i64 &&
5132 Op.getValueType().getSimpleVT() >= MVT::i16 &&
5133 "Unknown FP_TO_SINT to lower!");
5135 // These are really Legal.
5136 if (Op.getValueType() == MVT::i32 &&
5137 isScalarFPTypeInSSEReg(Op.getOperand(0).getValueType()))
5138 return std::make_pair(SDValue(), SDValue());
5139 if (Subtarget->is64Bit() &&
5140 Op.getValueType() == MVT::i64 &&
5141 Op.getOperand(0).getValueType() != MVT::f80)
5142 return std::make_pair(SDValue(), SDValue());
5144 // We lower FP->sint64 into FISTP64, followed by a load, all to a temporary
5146 MachineFunction &MF = DAG.getMachineFunction();
5147 unsigned MemSize = Op.getValueType().getSizeInBits()/8;
5148 int SSFI = MF.getFrameInfo()->CreateStackObject(MemSize, MemSize);
5149 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
5151 switch (Op.getValueType().getSimpleVT()) {
5152 default: assert(0 && "Invalid FP_TO_SINT to lower!");
5153 case MVT::i16: Opc = X86ISD::FP_TO_INT16_IN_MEM; break;
5154 case MVT::i32: Opc = X86ISD::FP_TO_INT32_IN_MEM; break;
5155 case MVT::i64: Opc = X86ISD::FP_TO_INT64_IN_MEM; break;
5158 SDValue Chain = DAG.getEntryNode();
5159 SDValue Value = Op.getOperand(0);
5160 if (isScalarFPTypeInSSEReg(Op.getOperand(0).getValueType())) {
5161 assert(Op.getValueType() == MVT::i64 && "Invalid FP_TO_SINT to lower!");
5162 Chain = DAG.getStore(Chain, dl, Value, StackSlot,
5163 PseudoSourceValue::getFixedStack(SSFI), 0);
5164 SDVTList Tys = DAG.getVTList(Op.getOperand(0).getValueType(), MVT::Other);
5166 Chain, StackSlot, DAG.getValueType(Op.getOperand(0).getValueType())
5168 Value = DAG.getNode(X86ISD::FLD, dl, Tys, Ops, 3);
5169 Chain = Value.getValue(1);
5170 SSFI = MF.getFrameInfo()->CreateStackObject(MemSize, MemSize);
5171 StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
5174 // Build the FP_TO_INT*_IN_MEM
5175 SDValue Ops[] = { Chain, Value, StackSlot };
5176 SDValue FIST = DAG.getNode(Opc, dl, MVT::Other, Ops, 3);
5178 return std::make_pair(FIST, StackSlot);
5181 SDValue X86TargetLowering::LowerFP_TO_SINT(SDValue Op, SelectionDAG &DAG) {
5182 std::pair<SDValue,SDValue> Vals = FP_TO_SINTHelper(Op, DAG);
5183 SDValue FIST = Vals.first, StackSlot = Vals.second;
5184 if (FIST.getNode() == 0) return SDValue();
5187 return DAG.getLoad(Op.getValueType(), Op.getDebugLoc(),
5188 FIST, StackSlot, NULL, 0);
5191 SDValue X86TargetLowering::LowerFABS(SDValue Op, SelectionDAG &DAG) {
5192 DebugLoc dl = Op.getDebugLoc();
5193 MVT VT = Op.getValueType();
5196 EltVT = VT.getVectorElementType();
5197 std::vector<Constant*> CV;
5198 if (EltVT == MVT::f64) {
5199 Constant *C = ConstantFP::get(APFloat(APInt(64, ~(1ULL << 63))));
5203 Constant *C = ConstantFP::get(APFloat(APInt(32, ~(1U << 31))));
5209 Constant *C = ConstantVector::get(CV);
5210 SDValue CPIdx = DAG.getConstantPool(C, getPointerTy(), 4);
5211 SDValue Mask = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
5212 PseudoSourceValue::getConstantPool(), 0,
5214 return DAG.getNode(X86ISD::FAND, dl, VT, Op.getOperand(0), Mask);
5217 SDValue X86TargetLowering::LowerFNEG(SDValue Op, SelectionDAG &DAG) {
5218 DebugLoc dl = Op.getDebugLoc();
5219 MVT VT = Op.getValueType();
5221 unsigned EltNum = 1;
5222 if (VT.isVector()) {
5223 EltVT = VT.getVectorElementType();
5224 EltNum = VT.getVectorNumElements();
5226 std::vector<Constant*> CV;
5227 if (EltVT == MVT::f64) {
5228 Constant *C = ConstantFP::get(APFloat(APInt(64, 1ULL << 63)));
5232 Constant *C = ConstantFP::get(APFloat(APInt(32, 1U << 31)));
5238 Constant *C = ConstantVector::get(CV);
5239 SDValue CPIdx = DAG.getConstantPool(C, getPointerTy(), 4);
5240 SDValue Mask = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
5241 PseudoSourceValue::getConstantPool(), 0,
5243 if (VT.isVector()) {
5244 return DAG.getNode(ISD::BIT_CONVERT, dl, VT,
5245 DAG.getNode(ISD::XOR, dl, MVT::v2i64,
5246 DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v2i64,
5248 DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v2i64, Mask)));
5250 return DAG.getNode(X86ISD::FXOR, dl, VT, Op.getOperand(0), Mask);
5254 SDValue X86TargetLowering::LowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) {
5255 SDValue Op0 = Op.getOperand(0);
5256 SDValue Op1 = Op.getOperand(1);
5257 DebugLoc dl = Op.getDebugLoc();
5258 MVT VT = Op.getValueType();
5259 MVT SrcVT = Op1.getValueType();
5261 // If second operand is smaller, extend it first.
5262 if (SrcVT.bitsLT(VT)) {
5263 Op1 = DAG.getNode(ISD::FP_EXTEND, dl, VT, Op1);
5266 // And if it is bigger, shrink it first.
5267 if (SrcVT.bitsGT(VT)) {
5268 Op1 = DAG.getNode(ISD::FP_ROUND, dl, VT, Op1, DAG.getIntPtrConstant(1));
5272 // At this point the operands and the result should have the same
5273 // type, and that won't be f80 since that is not custom lowered.
5275 // First get the sign bit of second operand.
5276 std::vector<Constant*> CV;
5277 if (SrcVT == MVT::f64) {
5278 CV.push_back(ConstantFP::get(APFloat(APInt(64, 1ULL << 63))));
5279 CV.push_back(ConstantFP::get(APFloat(APInt(64, 0))));
5281 CV.push_back(ConstantFP::get(APFloat(APInt(32, 1U << 31))));
5282 CV.push_back(ConstantFP::get(APFloat(APInt(32, 0))));
5283 CV.push_back(ConstantFP::get(APFloat(APInt(32, 0))));
5284 CV.push_back(ConstantFP::get(APFloat(APInt(32, 0))));
5286 Constant *C = ConstantVector::get(CV);
5287 SDValue CPIdx = DAG.getConstantPool(C, getPointerTy(), 4);
5288 SDValue Mask1 = DAG.getLoad(SrcVT, dl, DAG.getEntryNode(), CPIdx,
5289 PseudoSourceValue::getConstantPool(), 0,
5291 SDValue SignBit = DAG.getNode(X86ISD::FAND, dl, SrcVT, Op1, Mask1);
5293 // Shift sign bit right or left if the two operands have different types.
5294 if (SrcVT.bitsGT(VT)) {
5295 // Op0 is MVT::f32, Op1 is MVT::f64.
5296 SignBit = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2f64, SignBit);
5297 SignBit = DAG.getNode(X86ISD::FSRL, dl, MVT::v2f64, SignBit,
5298 DAG.getConstant(32, MVT::i32));
5299 SignBit = DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v4f32, SignBit);
5300 SignBit = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f32, SignBit,
5301 DAG.getIntPtrConstant(0));
5304 // Clear first operand sign bit.
5306 if (VT == MVT::f64) {
5307 CV.push_back(ConstantFP::get(APFloat(APInt(64, ~(1ULL << 63)))));
5308 CV.push_back(ConstantFP::get(APFloat(APInt(64, 0))));
5310 CV.push_back(ConstantFP::get(APFloat(APInt(32, ~(1U << 31)))));
5311 CV.push_back(ConstantFP::get(APFloat(APInt(32, 0))));
5312 CV.push_back(ConstantFP::get(APFloat(APInt(32, 0))));
5313 CV.push_back(ConstantFP::get(APFloat(APInt(32, 0))));
5315 C = ConstantVector::get(CV);
5316 CPIdx = DAG.getConstantPool(C, getPointerTy(), 4);
5317 SDValue Mask2 = DAG.getLoad(VT, dl, DAG.getEntryNode(), CPIdx,
5318 PseudoSourceValue::getConstantPool(), 0,
5320 SDValue Val = DAG.getNode(X86ISD::FAND, dl, VT, Op0, Mask2);
5322 // Or the value with the sign bit.
5323 return DAG.getNode(X86ISD::FOR, dl, VT, Val, SignBit);
5326 SDValue X86TargetLowering::LowerSETCC(SDValue Op, SelectionDAG &DAG) {
5327 assert(Op.getValueType() == MVT::i8 && "SetCC type must be 8-bit integer");
5328 SDValue Op0 = Op.getOperand(0);
5329 SDValue Op1 = Op.getOperand(1);
5330 DebugLoc dl = Op.getDebugLoc();
5331 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(2))->get();
5333 // Lower (X & (1 << N)) == 0 to BT(X, N).
5334 // Lower ((X >>u N) & 1) != 0 to BT(X, N).
5335 // Lower ((X >>s N) & 1) != 0 to BT(X, N).
5336 if (Op0.getOpcode() == ISD::AND &&
5338 Op1.getOpcode() == ISD::Constant &&
5339 cast<ConstantSDNode>(Op1)->getZExtValue() == 0 &&
5340 (CC == ISD::SETEQ || CC == ISD::SETNE)) {
5342 if (Op0.getOperand(1).getOpcode() == ISD::SHL) {
5343 if (ConstantSDNode *Op010C =
5344 dyn_cast<ConstantSDNode>(Op0.getOperand(1).getOperand(0)))
5345 if (Op010C->getZExtValue() == 1) {
5346 LHS = Op0.getOperand(0);
5347 RHS = Op0.getOperand(1).getOperand(1);
5349 } else if (Op0.getOperand(0).getOpcode() == ISD::SHL) {
5350 if (ConstantSDNode *Op000C =
5351 dyn_cast<ConstantSDNode>(Op0.getOperand(0).getOperand(0)))
5352 if (Op000C->getZExtValue() == 1) {
5353 LHS = Op0.getOperand(1);
5354 RHS = Op0.getOperand(0).getOperand(1);
5356 } else if (Op0.getOperand(1).getOpcode() == ISD::Constant) {
5357 ConstantSDNode *AndRHS = cast<ConstantSDNode>(Op0.getOperand(1));
5358 SDValue AndLHS = Op0.getOperand(0);
5359 if (AndRHS->getZExtValue() == 1 && AndLHS.getOpcode() == ISD::SRL) {
5360 LHS = AndLHS.getOperand(0);
5361 RHS = AndLHS.getOperand(1);
5365 if (LHS.getNode()) {
5366 // If LHS is i8, promote it to i16 with any_extend. There is no i8 BT
5367 // instruction. Since the shift amount is in-range-or-undefined, we know
5368 // that doing a bittest on the i16 value is ok. We extend to i32 because
5369 // the encoding for the i16 version is larger than the i32 version.
5370 if (LHS.getValueType() == MVT::i8)
5371 LHS = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, LHS);
5373 // If the operand types disagree, extend the shift amount to match. Since
5374 // BT ignores high bits (like shifts) we can use anyextend.
5375 if (LHS.getValueType() != RHS.getValueType())
5376 RHS = DAG.getNode(ISD::ANY_EXTEND, dl, LHS.getValueType(), RHS);
5378 SDValue BT = DAG.getNode(X86ISD::BT, dl, MVT::i32, LHS, RHS);
5379 unsigned Cond = CC == ISD::SETEQ ? X86::COND_AE : X86::COND_B;
5380 return DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
5381 DAG.getConstant(Cond, MVT::i8), BT);
5385 bool isFP = Op.getOperand(1).getValueType().isFloatingPoint();
5386 unsigned X86CC = TranslateX86CC(CC, isFP, Op0, Op1, DAG);
5388 SDValue Cond = DAG.getNode(X86ISD::CMP, dl, MVT::i32, Op0, Op1);
5389 return DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
5390 DAG.getConstant(X86CC, MVT::i8), Cond);
5393 SDValue X86TargetLowering::LowerVSETCC(SDValue Op, SelectionDAG &DAG) {
5395 SDValue Op0 = Op.getOperand(0);
5396 SDValue Op1 = Op.getOperand(1);
5397 SDValue CC = Op.getOperand(2);
5398 MVT VT = Op.getValueType();
5399 ISD::CondCode SetCCOpcode = cast<CondCodeSDNode>(CC)->get();
5400 bool isFP = Op.getOperand(1).getValueType().isFloatingPoint();
5401 DebugLoc dl = Op.getDebugLoc();
5405 MVT VT0 = Op0.getValueType();
5406 assert(VT0 == MVT::v4f32 || VT0 == MVT::v2f64);
5407 unsigned Opc = VT0 == MVT::v4f32 ? X86ISD::CMPPS : X86ISD::CMPPD;
5410 switch (SetCCOpcode) {
5413 case ISD::SETEQ: SSECC = 0; break;
5415 case ISD::SETGT: Swap = true; // Fallthrough
5417 case ISD::SETOLT: SSECC = 1; break;
5419 case ISD::SETGE: Swap = true; // Fallthrough
5421 case ISD::SETOLE: SSECC = 2; break;
5422 case ISD::SETUO: SSECC = 3; break;
5424 case ISD::SETNE: SSECC = 4; break;
5425 case ISD::SETULE: Swap = true;
5426 case ISD::SETUGE: SSECC = 5; break;
5427 case ISD::SETULT: Swap = true;
5428 case ISD::SETUGT: SSECC = 6; break;
5429 case ISD::SETO: SSECC = 7; break;
5432 std::swap(Op0, Op1);
5434 // In the two special cases we can't handle, emit two comparisons.
5436 if (SetCCOpcode == ISD::SETUEQ) {
5438 UNORD = DAG.getNode(Opc, dl, VT, Op0, Op1, DAG.getConstant(3, MVT::i8));
5439 EQ = DAG.getNode(Opc, dl, VT, Op0, Op1, DAG.getConstant(0, MVT::i8));
5440 return DAG.getNode(ISD::OR, dl, VT, UNORD, EQ);
5442 else if (SetCCOpcode == ISD::SETONE) {
5444 ORD = DAG.getNode(Opc, dl, VT, Op0, Op1, DAG.getConstant(7, MVT::i8));
5445 NEQ = DAG.getNode(Opc, dl, VT, Op0, Op1, DAG.getConstant(4, MVT::i8));
5446 return DAG.getNode(ISD::AND, dl, VT, ORD, NEQ);
5448 assert(0 && "Illegal FP comparison");
5450 // Handle all other FP comparisons here.
5451 return DAG.getNode(Opc, dl, VT, Op0, Op1, DAG.getConstant(SSECC, MVT::i8));
5454 // We are handling one of the integer comparisons here. Since SSE only has
5455 // GT and EQ comparisons for integer, swapping operands and multiple
5456 // operations may be required for some comparisons.
5457 unsigned Opc = 0, EQOpc = 0, GTOpc = 0;
5458 bool Swap = false, Invert = false, FlipSigns = false;
5460 switch (VT.getSimpleVT()) {
5462 case MVT::v16i8: EQOpc = X86ISD::PCMPEQB; GTOpc = X86ISD::PCMPGTB; break;
5463 case MVT::v8i16: EQOpc = X86ISD::PCMPEQW; GTOpc = X86ISD::PCMPGTW; break;
5464 case MVT::v4i32: EQOpc = X86ISD::PCMPEQD; GTOpc = X86ISD::PCMPGTD; break;
5465 case MVT::v2i64: EQOpc = X86ISD::PCMPEQQ; GTOpc = X86ISD::PCMPGTQ; break;
5468 switch (SetCCOpcode) {
5470 case ISD::SETNE: Invert = true;
5471 case ISD::SETEQ: Opc = EQOpc; break;
5472 case ISD::SETLT: Swap = true;
5473 case ISD::SETGT: Opc = GTOpc; break;
5474 case ISD::SETGE: Swap = true;
5475 case ISD::SETLE: Opc = GTOpc; Invert = true; break;
5476 case ISD::SETULT: Swap = true;
5477 case ISD::SETUGT: Opc = GTOpc; FlipSigns = true; break;
5478 case ISD::SETUGE: Swap = true;
5479 case ISD::SETULE: Opc = GTOpc; FlipSigns = true; Invert = true; break;
5482 std::swap(Op0, Op1);
5484 // Since SSE has no unsigned integer comparisons, we need to flip the sign
5485 // bits of the inputs before performing those operations.
5487 MVT EltVT = VT.getVectorElementType();
5488 SDValue SignBit = DAG.getConstant(APInt::getSignBit(EltVT.getSizeInBits()),
5490 std::vector<SDValue> SignBits(VT.getVectorNumElements(), SignBit);
5491 SDValue SignVec = DAG.getBUILD_VECTOR(VT, dl, &SignBits[0], SignBits.size());
5492 Op0 = DAG.getNode(ISD::XOR, dl, VT, Op0, SignVec);
5493 Op1 = DAG.getNode(ISD::XOR, dl, VT, Op1, SignVec);
5496 SDValue Result = DAG.getNode(Opc, dl, VT, Op0, Op1);
5498 // If the logical-not of the result is required, perform that now.
5500 Result = DAG.getNOT(dl, Result, VT);
5505 // isX86LogicalCmp - Return true if opcode is a X86 logical comparison.
5506 static bool isX86LogicalCmp(unsigned Opc) {
5507 return Opc == X86ISD::CMP || Opc == X86ISD::COMI || Opc == X86ISD::UCOMI;
5510 SDValue X86TargetLowering::LowerSELECT(SDValue Op, SelectionDAG &DAG) {
5511 bool addTest = true;
5512 SDValue Cond = Op.getOperand(0);
5513 DebugLoc dl = Op.getDebugLoc();
5516 if (Cond.getOpcode() == ISD::SETCC)
5517 Cond = LowerSETCC(Cond, DAG);
5519 // If condition flag is set by a X86ISD::CMP, then use it as the condition
5520 // setting operand in place of the X86ISD::SETCC.
5521 if (Cond.getOpcode() == X86ISD::SETCC) {
5522 CC = Cond.getOperand(0);
5524 SDValue Cmp = Cond.getOperand(1);
5525 unsigned Opc = Cmp.getOpcode();
5526 MVT VT = Op.getValueType();
5528 bool IllegalFPCMov = false;
5529 if (VT.isFloatingPoint() && !VT.isVector() &&
5530 !isScalarFPTypeInSSEReg(VT)) // FPStack?
5531 IllegalFPCMov = !hasFPCMov(cast<ConstantSDNode>(CC)->getSExtValue());
5533 if ((isX86LogicalCmp(Opc) && !IllegalFPCMov) || Opc == X86ISD::BT) { // FIXME
5540 CC = DAG.getConstant(X86::COND_NE, MVT::i8);
5541 Cond= DAG.getNode(X86ISD::CMP, dl, MVT::i32, Cond,
5542 DAG.getConstant(0, MVT::i8));
5545 const MVT *VTs = DAG.getNodeValueTypes(Op.getValueType(),
5547 SmallVector<SDValue, 4> Ops;
5548 // X86ISD::CMOV means set the result (which is operand 1) to the RHS if
5549 // condition is true.
5550 Ops.push_back(Op.getOperand(2));
5551 Ops.push_back(Op.getOperand(1));
5553 Ops.push_back(Cond);
5554 return DAG.getNode(X86ISD::CMOV, dl, VTs, 2, &Ops[0], Ops.size());
5557 // isAndOrOfSingleUseSetCCs - Return true if node is an ISD::AND or
5558 // ISD::OR of two X86ISD::SETCC nodes each of which has no other use apart
5559 // from the AND / OR.
5560 static bool isAndOrOfSetCCs(SDValue Op, unsigned &Opc) {
5561 Opc = Op.getOpcode();
5562 if (Opc != ISD::OR && Opc != ISD::AND)
5564 return (Op.getOperand(0).getOpcode() == X86ISD::SETCC &&
5565 Op.getOperand(0).hasOneUse() &&
5566 Op.getOperand(1).getOpcode() == X86ISD::SETCC &&
5567 Op.getOperand(1).hasOneUse());
5570 // isXor1OfSetCC - Return true if node is an ISD::XOR of a X86ISD::SETCC and
5571 // 1 and that the SETCC node has a single use.
5572 static bool isXor1OfSetCC(SDValue Op) {
5573 if (Op.getOpcode() != ISD::XOR)
5575 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(Op.getOperand(1));
5576 if (N1C && N1C->getAPIntValue() == 1) {
5577 return Op.getOperand(0).getOpcode() == X86ISD::SETCC &&
5578 Op.getOperand(0).hasOneUse();
5583 SDValue X86TargetLowering::LowerBRCOND(SDValue Op, SelectionDAG &DAG) {
5584 bool addTest = true;
5585 SDValue Chain = Op.getOperand(0);
5586 SDValue Cond = Op.getOperand(1);
5587 SDValue Dest = Op.getOperand(2);
5588 DebugLoc dl = Op.getDebugLoc();
5591 if (Cond.getOpcode() == ISD::SETCC)
5592 Cond = LowerSETCC(Cond, DAG);
5594 // FIXME: LowerXALUO doesn't handle these!!
5595 else if (Cond.getOpcode() == X86ISD::ADD ||
5596 Cond.getOpcode() == X86ISD::SUB ||
5597 Cond.getOpcode() == X86ISD::SMUL ||
5598 Cond.getOpcode() == X86ISD::UMUL)
5599 Cond = LowerXALUO(Cond, DAG);
5602 // If condition flag is set by a X86ISD::CMP, then use it as the condition
5603 // setting operand in place of the X86ISD::SETCC.
5604 if (Cond.getOpcode() == X86ISD::SETCC) {
5605 CC = Cond.getOperand(0);
5607 SDValue Cmp = Cond.getOperand(1);
5608 unsigned Opc = Cmp.getOpcode();
5609 // FIXME: WHY THE SPECIAL CASING OF LogicalCmp??
5610 if (isX86LogicalCmp(Opc) || Opc == X86ISD::BT) {
5614 switch (cast<ConstantSDNode>(CC)->getZExtValue()) {
5618 // These can only come from an arithmetic instruction with overflow,
5619 // e.g. SADDO, UADDO.
5620 Cond = Cond.getNode()->getOperand(1);
5627 if (Cond.hasOneUse() && isAndOrOfSetCCs(Cond, CondOpc)) {
5628 SDValue Cmp = Cond.getOperand(0).getOperand(1);
5629 unsigned Opc = Cmp.getOpcode();
5630 if (CondOpc == ISD::OR) {
5631 // Also, recognize the pattern generated by an FCMP_UNE. We can emit
5632 // two branches instead of an explicit OR instruction with a
5634 if (Cmp == Cond.getOperand(1).getOperand(1) &&
5635 isX86LogicalCmp(Opc)) {
5636 CC = Cond.getOperand(0).getOperand(0);
5637 Chain = DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
5638 Chain, Dest, CC, Cmp);
5639 CC = Cond.getOperand(1).getOperand(0);
5643 } else { // ISD::AND
5644 // Also, recognize the pattern generated by an FCMP_OEQ. We can emit
5645 // two branches instead of an explicit AND instruction with a
5646 // separate test. However, we only do this if this block doesn't
5647 // have a fall-through edge, because this requires an explicit
5648 // jmp when the condition is false.
5649 if (Cmp == Cond.getOperand(1).getOperand(1) &&
5650 isX86LogicalCmp(Opc) &&
5651 Op.getNode()->hasOneUse()) {
5652 X86::CondCode CCode =
5653 (X86::CondCode)Cond.getOperand(0).getConstantOperandVal(0);
5654 CCode = X86::GetOppositeBranchCondition(CCode);
5655 CC = DAG.getConstant(CCode, MVT::i8);
5656 SDValue User = SDValue(*Op.getNode()->use_begin(), 0);
5657 // Look for an unconditional branch following this conditional branch.
5658 // We need this because we need to reverse the successors in order
5659 // to implement FCMP_OEQ.
5660 if (User.getOpcode() == ISD::BR) {
5661 SDValue FalseBB = User.getOperand(1);
5663 DAG.UpdateNodeOperands(User, User.getOperand(0), Dest);
5664 assert(NewBR == User);
5667 Chain = DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
5668 Chain, Dest, CC, Cmp);
5669 X86::CondCode CCode =
5670 (X86::CondCode)Cond.getOperand(1).getConstantOperandVal(0);
5671 CCode = X86::GetOppositeBranchCondition(CCode);
5672 CC = DAG.getConstant(CCode, MVT::i8);
5678 } else if (Cond.hasOneUse() && isXor1OfSetCC(Cond)) {
5679 // Recognize for xorb (setcc), 1 patterns. The xor inverts the condition.
5680 // It should be transformed during dag combiner except when the condition
5681 // is set by a arithmetics with overflow node.
5682 X86::CondCode CCode =
5683 (X86::CondCode)Cond.getOperand(0).getConstantOperandVal(0);
5684 CCode = X86::GetOppositeBranchCondition(CCode);
5685 CC = DAG.getConstant(CCode, MVT::i8);
5686 Cond = Cond.getOperand(0).getOperand(1);
5692 CC = DAG.getConstant(X86::COND_NE, MVT::i8);
5693 Cond= DAG.getNode(X86ISD::CMP, dl, MVT::i32, Cond,
5694 DAG.getConstant(0, MVT::i8));
5696 return DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
5697 Chain, Dest, CC, Cond);
5701 // Lower dynamic stack allocation to _alloca call for Cygwin/Mingw targets.
5702 // Calls to _alloca is needed to probe the stack when allocating more than 4k
5703 // bytes in one go. Touching the stack at 4K increments is necessary to ensure
5704 // that the guard pages used by the OS virtual memory manager are allocated in
5705 // correct sequence.
5707 X86TargetLowering::LowerDYNAMIC_STACKALLOC(SDValue Op,
5708 SelectionDAG &DAG) {
5709 assert(Subtarget->isTargetCygMing() &&
5710 "This should be used only on Cygwin/Mingw targets");
5711 DebugLoc dl = Op.getDebugLoc();
5714 SDValue Chain = Op.getOperand(0);
5715 SDValue Size = Op.getOperand(1);
5716 // FIXME: Ensure alignment here
5720 MVT IntPtr = getPointerTy();
5721 MVT SPTy = Subtarget->is64Bit() ? MVT::i64 : MVT::i32;
5723 Chain = DAG.getCALLSEQ_START(Chain, DAG.getIntPtrConstant(0, true));
5725 Chain = DAG.getCopyToReg(Chain, dl, X86::EAX, Size, Flag);
5726 Flag = Chain.getValue(1);
5728 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Flag);
5729 SDValue Ops[] = { Chain,
5730 DAG.getTargetExternalSymbol("_alloca", IntPtr),
5731 DAG.getRegister(X86::EAX, IntPtr),
5732 DAG.getRegister(X86StackPtr, SPTy),
5734 Chain = DAG.getNode(X86ISD::CALL, dl, NodeTys, Ops, 5);
5735 Flag = Chain.getValue(1);
5737 Chain = DAG.getCALLSEQ_END(Chain,
5738 DAG.getIntPtrConstant(0, true),
5739 DAG.getIntPtrConstant(0, true),
5742 Chain = DAG.getCopyFromReg(Chain, dl, X86StackPtr, SPTy).getValue(1);
5744 SDValue Ops1[2] = { Chain.getValue(0), Chain };
5745 return DAG.getMergeValues(Ops1, 2, dl);
5749 X86TargetLowering::EmitTargetCodeForMemset(SelectionDAG &DAG, DebugLoc dl,
5751 SDValue Dst, SDValue Src,
5752 SDValue Size, unsigned Align,
5754 uint64_t DstSVOff) {
5755 ConstantSDNode *ConstantSize = dyn_cast<ConstantSDNode>(Size);
5757 // If not DWORD aligned or size is more than the threshold, call the library.
5758 // The libc version is likely to be faster for these cases. It can use the
5759 // address value and run time information about the CPU.
5760 if ((Align & 3) != 0 ||
5762 ConstantSize->getZExtValue() >
5763 getSubtarget()->getMaxInlineSizeThreshold()) {
5764 SDValue InFlag(0, 0);
5766 // Check to see if there is a specialized entry-point for memory zeroing.
5767 ConstantSDNode *V = dyn_cast<ConstantSDNode>(Src);
5769 if (const char *bzeroEntry = V &&
5770 V->isNullValue() ? Subtarget->getBZeroEntry() : 0) {
5771 MVT IntPtr = getPointerTy();
5772 const Type *IntPtrTy = TD->getIntPtrType();
5773 TargetLowering::ArgListTy Args;
5774 TargetLowering::ArgListEntry Entry;
5776 Entry.Ty = IntPtrTy;
5777 Args.push_back(Entry);
5779 Args.push_back(Entry);
5780 std::pair<SDValue,SDValue> CallResult =
5781 LowerCallTo(Chain, Type::VoidTy, false, false, false, false,
5782 CallingConv::C, false,
5783 DAG.getExternalSymbol(bzeroEntry, IntPtr), Args, DAG, dl);
5784 return CallResult.second;
5787 // Otherwise have the target-independent code call memset.
5791 uint64_t SizeVal = ConstantSize->getZExtValue();
5792 SDValue InFlag(0, 0);
5795 ConstantSDNode *ValC = dyn_cast<ConstantSDNode>(Src);
5796 unsigned BytesLeft = 0;
5797 bool TwoRepStos = false;
5800 uint64_t Val = ValC->getZExtValue() & 255;
5802 // If the value is a constant, then we can potentially use larger sets.
5803 switch (Align & 3) {
5804 case 2: // WORD aligned
5807 Val = (Val << 8) | Val;
5809 case 0: // DWORD aligned
5812 Val = (Val << 8) | Val;
5813 Val = (Val << 16) | Val;
5814 if (Subtarget->is64Bit() && ((Align & 0x7) == 0)) { // QWORD aligned
5817 Val = (Val << 32) | Val;
5820 default: // Byte aligned
5823 Count = DAG.getIntPtrConstant(SizeVal);
5827 if (AVT.bitsGT(MVT::i8)) {
5828 unsigned UBytes = AVT.getSizeInBits() / 8;
5829 Count = DAG.getIntPtrConstant(SizeVal / UBytes);
5830 BytesLeft = SizeVal % UBytes;
5833 Chain = DAG.getCopyToReg(Chain, dl, ValReg, DAG.getConstant(Val, AVT),
5835 InFlag = Chain.getValue(1);
5838 Count = DAG.getIntPtrConstant(SizeVal);
5839 Chain = DAG.getCopyToReg(Chain, dl, X86::AL, Src, InFlag);
5840 InFlag = Chain.getValue(1);
5843 Chain = DAG.getCopyToReg(Chain, dl, Subtarget->is64Bit() ? X86::RCX :
5846 InFlag = Chain.getValue(1);
5847 Chain = DAG.getCopyToReg(Chain, dl, Subtarget->is64Bit() ? X86::RDI :
5850 InFlag = Chain.getValue(1);
5852 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Flag);
5853 SmallVector<SDValue, 8> Ops;
5854 Ops.push_back(Chain);
5855 Ops.push_back(DAG.getValueType(AVT));
5856 Ops.push_back(InFlag);
5857 Chain = DAG.getNode(X86ISD::REP_STOS, dl, Tys, &Ops[0], Ops.size());
5860 InFlag = Chain.getValue(1);
5862 MVT CVT = Count.getValueType();
5863 SDValue Left = DAG.getNode(ISD::AND, dl, CVT, Count,
5864 DAG.getConstant((AVT == MVT::i64) ? 7 : 3, CVT));
5865 Chain = DAG.getCopyToReg(Chain, dl, (CVT == MVT::i64) ? X86::RCX :
5868 InFlag = Chain.getValue(1);
5869 Tys = DAG.getVTList(MVT::Other, MVT::Flag);
5871 Ops.push_back(Chain);
5872 Ops.push_back(DAG.getValueType(MVT::i8));
5873 Ops.push_back(InFlag);
5874 Chain = DAG.getNode(X86ISD::REP_STOS, dl, Tys, &Ops[0], Ops.size());
5875 } else if (BytesLeft) {
5876 // Handle the last 1 - 7 bytes.
5877 unsigned Offset = SizeVal - BytesLeft;
5878 MVT AddrVT = Dst.getValueType();
5879 MVT SizeVT = Size.getValueType();
5881 Chain = DAG.getMemset(Chain, dl,
5882 DAG.getNode(ISD::ADD, dl, AddrVT, Dst,
5883 DAG.getConstant(Offset, AddrVT)),
5885 DAG.getConstant(BytesLeft, SizeVT),
5886 Align, DstSV, DstSVOff + Offset);
5889 // TODO: Use a Tokenfactor, as in memcpy, instead of a single chain.
5894 X86TargetLowering::EmitTargetCodeForMemcpy(SelectionDAG &DAG, DebugLoc dl,
5895 SDValue Chain, SDValue Dst, SDValue Src,
5896 SDValue Size, unsigned Align,
5898 const Value *DstSV, uint64_t DstSVOff,
5899 const Value *SrcSV, uint64_t SrcSVOff) {
5900 // This requires the copy size to be a constant, preferrably
5901 // within a subtarget-specific limit.
5902 ConstantSDNode *ConstantSize = dyn_cast<ConstantSDNode>(Size);
5905 uint64_t SizeVal = ConstantSize->getZExtValue();
5906 if (!AlwaysInline && SizeVal > getSubtarget()->getMaxInlineSizeThreshold())
5909 /// If not DWORD aligned, call the library.
5910 if ((Align & 3) != 0)
5915 if (Subtarget->is64Bit() && ((Align & 0x7) == 0)) // QWORD aligned
5918 unsigned UBytes = AVT.getSizeInBits() / 8;
5919 unsigned CountVal = SizeVal / UBytes;
5920 SDValue Count = DAG.getIntPtrConstant(CountVal);
5921 unsigned BytesLeft = SizeVal % UBytes;
5923 SDValue InFlag(0, 0);
5924 Chain = DAG.getCopyToReg(Chain, dl, Subtarget->is64Bit() ? X86::RCX :
5927 InFlag = Chain.getValue(1);
5928 Chain = DAG.getCopyToReg(Chain, dl, Subtarget->is64Bit() ? X86::RDI :
5931 InFlag = Chain.getValue(1);
5932 Chain = DAG.getCopyToReg(Chain, dl, Subtarget->is64Bit() ? X86::RSI :
5935 InFlag = Chain.getValue(1);
5937 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Flag);
5938 SmallVector<SDValue, 8> Ops;
5939 Ops.push_back(Chain);
5940 Ops.push_back(DAG.getValueType(AVT));
5941 Ops.push_back(InFlag);
5942 SDValue RepMovs = DAG.getNode(X86ISD::REP_MOVS, dl, Tys, &Ops[0], Ops.size());
5944 SmallVector<SDValue, 4> Results;
5945 Results.push_back(RepMovs);
5947 // Handle the last 1 - 7 bytes.
5948 unsigned Offset = SizeVal - BytesLeft;
5949 MVT DstVT = Dst.getValueType();
5950 MVT SrcVT = Src.getValueType();
5951 MVT SizeVT = Size.getValueType();
5952 Results.push_back(DAG.getMemcpy(Chain, dl,
5953 DAG.getNode(ISD::ADD, dl, DstVT, Dst,
5954 DAG.getConstant(Offset, DstVT)),
5955 DAG.getNode(ISD::ADD, dl, SrcVT, Src,
5956 DAG.getConstant(Offset, SrcVT)),
5957 DAG.getConstant(BytesLeft, SizeVT),
5958 Align, AlwaysInline,
5959 DstSV, DstSVOff + Offset,
5960 SrcSV, SrcSVOff + Offset));
5963 return DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
5964 &Results[0], Results.size());
5967 SDValue X86TargetLowering::LowerVASTART(SDValue Op, SelectionDAG &DAG) {
5968 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
5969 DebugLoc dl = Op.getDebugLoc();
5971 if (!Subtarget->is64Bit()) {
5972 // vastart just stores the address of the VarArgsFrameIndex slot into the
5973 // memory location argument.
5974 SDValue FR = DAG.getFrameIndex(VarArgsFrameIndex, getPointerTy());
5975 return DAG.getStore(Op.getOperand(0), dl, FR, Op.getOperand(1), SV, 0);
5979 // gp_offset (0 - 6 * 8)
5980 // fp_offset (48 - 48 + 8 * 16)
5981 // overflow_arg_area (point to parameters coming in memory).
5983 SmallVector<SDValue, 8> MemOps;
5984 SDValue FIN = Op.getOperand(1);
5986 SDValue Store = DAG.getStore(Op.getOperand(0), dl,
5987 DAG.getConstant(VarArgsGPOffset, MVT::i32),
5989 MemOps.push_back(Store);
5992 FIN = DAG.getNode(ISD::ADD, dl, getPointerTy(),
5993 FIN, DAG.getIntPtrConstant(4));
5994 Store = DAG.getStore(Op.getOperand(0), dl,
5995 DAG.getConstant(VarArgsFPOffset, MVT::i32),
5997 MemOps.push_back(Store);
5999 // Store ptr to overflow_arg_area
6000 FIN = DAG.getNode(ISD::ADD, dl, getPointerTy(),
6001 FIN, DAG.getIntPtrConstant(4));
6002 SDValue OVFIN = DAG.getFrameIndex(VarArgsFrameIndex, getPointerTy());
6003 Store = DAG.getStore(Op.getOperand(0), dl, OVFIN, FIN, SV, 0);
6004 MemOps.push_back(Store);
6006 // Store ptr to reg_save_area.
6007 FIN = DAG.getNode(ISD::ADD, dl, getPointerTy(),
6008 FIN, DAG.getIntPtrConstant(8));
6009 SDValue RSFIN = DAG.getFrameIndex(RegSaveFrameIndex, getPointerTy());
6010 Store = DAG.getStore(Op.getOperand(0), dl, RSFIN, FIN, SV, 0);
6011 MemOps.push_back(Store);
6012 return DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
6013 &MemOps[0], MemOps.size());
6016 SDValue X86TargetLowering::LowerVAARG(SDValue Op, SelectionDAG &DAG) {
6017 // X86-64 va_list is a struct { i32, i32, i8*, i8* }.
6018 assert(Subtarget->is64Bit() && "This code only handles 64-bit va_arg!");
6019 SDValue Chain = Op.getOperand(0);
6020 SDValue SrcPtr = Op.getOperand(1);
6021 SDValue SrcSV = Op.getOperand(2);
6023 assert(0 && "VAArgInst is not yet implemented for x86-64!");
6028 SDValue X86TargetLowering::LowerVACOPY(SDValue Op, SelectionDAG &DAG) {
6029 // X86-64 va_list is a struct { i32, i32, i8*, i8* }.
6030 assert(Subtarget->is64Bit() && "This code only handles 64-bit va_copy!");
6031 SDValue Chain = Op.getOperand(0);
6032 SDValue DstPtr = Op.getOperand(1);
6033 SDValue SrcPtr = Op.getOperand(2);
6034 const Value *DstSV = cast<SrcValueSDNode>(Op.getOperand(3))->getValue();
6035 const Value *SrcSV = cast<SrcValueSDNode>(Op.getOperand(4))->getValue();
6036 DebugLoc dl = Op.getDebugLoc();
6038 return DAG.getMemcpy(Chain, dl, DstPtr, SrcPtr,
6039 DAG.getIntPtrConstant(24), 8, false,
6040 DstSV, 0, SrcSV, 0);
6044 X86TargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) {
6045 DebugLoc dl = Op.getDebugLoc();
6046 unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
6048 default: return SDValue(); // Don't custom lower most intrinsics.
6049 // Comparison intrinsics.
6050 case Intrinsic::x86_sse_comieq_ss:
6051 case Intrinsic::x86_sse_comilt_ss:
6052 case Intrinsic::x86_sse_comile_ss:
6053 case Intrinsic::x86_sse_comigt_ss:
6054 case Intrinsic::x86_sse_comige_ss:
6055 case Intrinsic::x86_sse_comineq_ss:
6056 case Intrinsic::x86_sse_ucomieq_ss:
6057 case Intrinsic::x86_sse_ucomilt_ss:
6058 case Intrinsic::x86_sse_ucomile_ss:
6059 case Intrinsic::x86_sse_ucomigt_ss:
6060 case Intrinsic::x86_sse_ucomige_ss:
6061 case Intrinsic::x86_sse_ucomineq_ss:
6062 case Intrinsic::x86_sse2_comieq_sd:
6063 case Intrinsic::x86_sse2_comilt_sd:
6064 case Intrinsic::x86_sse2_comile_sd:
6065 case Intrinsic::x86_sse2_comigt_sd:
6066 case Intrinsic::x86_sse2_comige_sd:
6067 case Intrinsic::x86_sse2_comineq_sd:
6068 case Intrinsic::x86_sse2_ucomieq_sd:
6069 case Intrinsic::x86_sse2_ucomilt_sd:
6070 case Intrinsic::x86_sse2_ucomile_sd:
6071 case Intrinsic::x86_sse2_ucomigt_sd:
6072 case Intrinsic::x86_sse2_ucomige_sd:
6073 case Intrinsic::x86_sse2_ucomineq_sd: {
6075 ISD::CondCode CC = ISD::SETCC_INVALID;
6078 case Intrinsic::x86_sse_comieq_ss:
6079 case Intrinsic::x86_sse2_comieq_sd:
6083 case Intrinsic::x86_sse_comilt_ss:
6084 case Intrinsic::x86_sse2_comilt_sd:
6088 case Intrinsic::x86_sse_comile_ss:
6089 case Intrinsic::x86_sse2_comile_sd:
6093 case Intrinsic::x86_sse_comigt_ss:
6094 case Intrinsic::x86_sse2_comigt_sd:
6098 case Intrinsic::x86_sse_comige_ss:
6099 case Intrinsic::x86_sse2_comige_sd:
6103 case Intrinsic::x86_sse_comineq_ss:
6104 case Intrinsic::x86_sse2_comineq_sd:
6108 case Intrinsic::x86_sse_ucomieq_ss:
6109 case Intrinsic::x86_sse2_ucomieq_sd:
6110 Opc = X86ISD::UCOMI;
6113 case Intrinsic::x86_sse_ucomilt_ss:
6114 case Intrinsic::x86_sse2_ucomilt_sd:
6115 Opc = X86ISD::UCOMI;
6118 case Intrinsic::x86_sse_ucomile_ss:
6119 case Intrinsic::x86_sse2_ucomile_sd:
6120 Opc = X86ISD::UCOMI;
6123 case Intrinsic::x86_sse_ucomigt_ss:
6124 case Intrinsic::x86_sse2_ucomigt_sd:
6125 Opc = X86ISD::UCOMI;
6128 case Intrinsic::x86_sse_ucomige_ss:
6129 case Intrinsic::x86_sse2_ucomige_sd:
6130 Opc = X86ISD::UCOMI;
6133 case Intrinsic::x86_sse_ucomineq_ss:
6134 case Intrinsic::x86_sse2_ucomineq_sd:
6135 Opc = X86ISD::UCOMI;
6140 SDValue LHS = Op.getOperand(1);
6141 SDValue RHS = Op.getOperand(2);
6142 unsigned X86CC = TranslateX86CC(CC, true, LHS, RHS, DAG);
6143 SDValue Cond = DAG.getNode(Opc, dl, MVT::i32, LHS, RHS);
6144 SDValue SetCC = DAG.getNode(X86ISD::SETCC, dl, MVT::i8,
6145 DAG.getConstant(X86CC, MVT::i8), Cond);
6146 return DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, SetCC);
6149 // Fix vector shift instructions where the last operand is a non-immediate
6151 case Intrinsic::x86_sse2_pslli_w:
6152 case Intrinsic::x86_sse2_pslli_d:
6153 case Intrinsic::x86_sse2_pslli_q:
6154 case Intrinsic::x86_sse2_psrli_w:
6155 case Intrinsic::x86_sse2_psrli_d:
6156 case Intrinsic::x86_sse2_psrli_q:
6157 case Intrinsic::x86_sse2_psrai_w:
6158 case Intrinsic::x86_sse2_psrai_d:
6159 case Intrinsic::x86_mmx_pslli_w:
6160 case Intrinsic::x86_mmx_pslli_d:
6161 case Intrinsic::x86_mmx_pslli_q:
6162 case Intrinsic::x86_mmx_psrli_w:
6163 case Intrinsic::x86_mmx_psrli_d:
6164 case Intrinsic::x86_mmx_psrli_q:
6165 case Intrinsic::x86_mmx_psrai_w:
6166 case Intrinsic::x86_mmx_psrai_d: {
6167 SDValue ShAmt = Op.getOperand(2);
6168 if (isa<ConstantSDNode>(ShAmt))
6171 unsigned NewIntNo = 0;
6172 MVT ShAmtVT = MVT::v4i32;
6174 case Intrinsic::x86_sse2_pslli_w:
6175 NewIntNo = Intrinsic::x86_sse2_psll_w;
6177 case Intrinsic::x86_sse2_pslli_d:
6178 NewIntNo = Intrinsic::x86_sse2_psll_d;
6180 case Intrinsic::x86_sse2_pslli_q:
6181 NewIntNo = Intrinsic::x86_sse2_psll_q;
6183 case Intrinsic::x86_sse2_psrli_w:
6184 NewIntNo = Intrinsic::x86_sse2_psrl_w;
6186 case Intrinsic::x86_sse2_psrli_d:
6187 NewIntNo = Intrinsic::x86_sse2_psrl_d;
6189 case Intrinsic::x86_sse2_psrli_q:
6190 NewIntNo = Intrinsic::x86_sse2_psrl_q;
6192 case Intrinsic::x86_sse2_psrai_w:
6193 NewIntNo = Intrinsic::x86_sse2_psra_w;
6195 case Intrinsic::x86_sse2_psrai_d:
6196 NewIntNo = Intrinsic::x86_sse2_psra_d;
6199 ShAmtVT = MVT::v2i32;
6201 case Intrinsic::x86_mmx_pslli_w:
6202 NewIntNo = Intrinsic::x86_mmx_psll_w;
6204 case Intrinsic::x86_mmx_pslli_d:
6205 NewIntNo = Intrinsic::x86_mmx_psll_d;
6207 case Intrinsic::x86_mmx_pslli_q:
6208 NewIntNo = Intrinsic::x86_mmx_psll_q;
6210 case Intrinsic::x86_mmx_psrli_w:
6211 NewIntNo = Intrinsic::x86_mmx_psrl_w;
6213 case Intrinsic::x86_mmx_psrli_d:
6214 NewIntNo = Intrinsic::x86_mmx_psrl_d;
6216 case Intrinsic::x86_mmx_psrli_q:
6217 NewIntNo = Intrinsic::x86_mmx_psrl_q;
6219 case Intrinsic::x86_mmx_psrai_w:
6220 NewIntNo = Intrinsic::x86_mmx_psra_w;
6222 case Intrinsic::x86_mmx_psrai_d:
6223 NewIntNo = Intrinsic::x86_mmx_psra_d;
6225 default: abort(); // Can't reach here.
6230 MVT VT = Op.getValueType();
6231 ShAmt = DAG.getNode(ISD::BIT_CONVERT, dl, VT,
6232 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, ShAmtVT, ShAmt));
6233 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
6234 DAG.getConstant(NewIntNo, MVT::i32),
6235 Op.getOperand(1), ShAmt);
6240 SDValue X86TargetLowering::LowerRETURNADDR(SDValue Op, SelectionDAG &DAG) {
6241 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
6242 DebugLoc dl = Op.getDebugLoc();
6245 SDValue FrameAddr = LowerFRAMEADDR(Op, DAG);
6247 DAG.getConstant(TD->getPointerSize(),
6248 Subtarget->is64Bit() ? MVT::i64 : MVT::i32);
6249 return DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
6250 DAG.getNode(ISD::ADD, dl, getPointerTy(),
6255 // Just load the return address.
6256 SDValue RetAddrFI = getReturnAddressFrameIndex(DAG);
6257 return DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
6258 RetAddrFI, NULL, 0);
6261 SDValue X86TargetLowering::LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) {
6262 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
6263 MFI->setFrameAddressIsTaken(true);
6264 MVT VT = Op.getValueType();
6265 DebugLoc dl = Op.getDebugLoc(); // FIXME probably not meaningful
6266 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
6267 unsigned FrameReg = Subtarget->is64Bit() ? X86::RBP : X86::EBP;
6268 SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, FrameReg, VT);
6270 FrameAddr = DAG.getLoad(VT, dl, DAG.getEntryNode(), FrameAddr, NULL, 0);
6274 SDValue X86TargetLowering::LowerFRAME_TO_ARGS_OFFSET(SDValue Op,
6275 SelectionDAG &DAG) {
6276 return DAG.getIntPtrConstant(2*TD->getPointerSize());
6279 SDValue X86TargetLowering::LowerEH_RETURN(SDValue Op, SelectionDAG &DAG)
6281 MachineFunction &MF = DAG.getMachineFunction();
6282 SDValue Chain = Op.getOperand(0);
6283 SDValue Offset = Op.getOperand(1);
6284 SDValue Handler = Op.getOperand(2);
6285 DebugLoc dl = Op.getDebugLoc();
6287 SDValue Frame = DAG.getRegister(Subtarget->is64Bit() ? X86::RBP : X86::EBP,
6289 unsigned StoreAddrReg = (Subtarget->is64Bit() ? X86::RCX : X86::ECX);
6291 SDValue StoreAddr = DAG.getNode(ISD::SUB, dl, getPointerTy(), Frame,
6292 DAG.getIntPtrConstant(-TD->getPointerSize()));
6293 StoreAddr = DAG.getNode(ISD::ADD, dl, getPointerTy(), StoreAddr, Offset);
6294 Chain = DAG.getStore(Chain, dl, Handler, StoreAddr, NULL, 0);
6295 Chain = DAG.getCopyToReg(Chain, dl, StoreAddrReg, StoreAddr);
6296 MF.getRegInfo().addLiveOut(StoreAddrReg);
6298 return DAG.getNode(X86ISD::EH_RETURN, dl,
6300 Chain, DAG.getRegister(StoreAddrReg, getPointerTy()));
6303 SDValue X86TargetLowering::LowerTRAMPOLINE(SDValue Op,
6304 SelectionDAG &DAG) {
6305 SDValue Root = Op.getOperand(0);
6306 SDValue Trmp = Op.getOperand(1); // trampoline
6307 SDValue FPtr = Op.getOperand(2); // nested function
6308 SDValue Nest = Op.getOperand(3); // 'nest' parameter value
6309 DebugLoc dl = Op.getDebugLoc();
6311 const Value *TrmpAddr = cast<SrcValueSDNode>(Op.getOperand(4))->getValue();
6313 const X86InstrInfo *TII =
6314 ((X86TargetMachine&)getTargetMachine()).getInstrInfo();
6316 if (Subtarget->is64Bit()) {
6317 SDValue OutChains[6];
6319 // Large code-model.
6321 const unsigned char JMP64r = TII->getBaseOpcodeFor(X86::JMP64r);
6322 const unsigned char MOV64ri = TII->getBaseOpcodeFor(X86::MOV64ri);
6324 const unsigned char N86R10 = RegInfo->getX86RegNum(X86::R10);
6325 const unsigned char N86R11 = RegInfo->getX86RegNum(X86::R11);
6327 const unsigned char REX_WB = 0x40 | 0x08 | 0x01; // REX prefix
6329 // Load the pointer to the nested function into R11.
6330 unsigned OpCode = ((MOV64ri | N86R11) << 8) | REX_WB; // movabsq r11
6331 SDValue Addr = Trmp;
6332 OutChains[0] = DAG.getStore(Root, dl, DAG.getConstant(OpCode, MVT::i16),
6335 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
6336 DAG.getConstant(2, MVT::i64));
6337 OutChains[1] = DAG.getStore(Root, dl, FPtr, Addr, TrmpAddr, 2, false, 2);
6339 // Load the 'nest' parameter value into R10.
6340 // R10 is specified in X86CallingConv.td
6341 OpCode = ((MOV64ri | N86R10) << 8) | REX_WB; // movabsq r10
6342 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
6343 DAG.getConstant(10, MVT::i64));
6344 OutChains[2] = DAG.getStore(Root, dl, DAG.getConstant(OpCode, MVT::i16),
6345 Addr, TrmpAddr, 10);
6347 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
6348 DAG.getConstant(12, MVT::i64));
6349 OutChains[3] = DAG.getStore(Root, dl, Nest, Addr, TrmpAddr, 12, false, 2);
6351 // Jump to the nested function.
6352 OpCode = (JMP64r << 8) | REX_WB; // jmpq *...
6353 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
6354 DAG.getConstant(20, MVT::i64));
6355 OutChains[4] = DAG.getStore(Root, dl, DAG.getConstant(OpCode, MVT::i16),
6356 Addr, TrmpAddr, 20);
6358 unsigned char ModRM = N86R11 | (4 << 3) | (3 << 6); // ...r11
6359 Addr = DAG.getNode(ISD::ADD, dl, MVT::i64, Trmp,
6360 DAG.getConstant(22, MVT::i64));
6361 OutChains[5] = DAG.getStore(Root, dl, DAG.getConstant(ModRM, MVT::i8), Addr,
6365 { Trmp, DAG.getNode(ISD::TokenFactor, dl, MVT::Other, OutChains, 6) };
6366 return DAG.getMergeValues(Ops, 2, dl);
6368 const Function *Func =
6369 cast<Function>(cast<SrcValueSDNode>(Op.getOperand(5))->getValue());
6370 unsigned CC = Func->getCallingConv();
6375 assert(0 && "Unsupported calling convention");
6376 case CallingConv::C:
6377 case CallingConv::X86_StdCall: {
6378 // Pass 'nest' parameter in ECX.
6379 // Must be kept in sync with X86CallingConv.td
6382 // Check that ECX wasn't needed by an 'inreg' parameter.
6383 const FunctionType *FTy = Func->getFunctionType();
6384 const AttrListPtr &Attrs = Func->getAttributes();
6386 if (!Attrs.isEmpty() && !Func->isVarArg()) {
6387 unsigned InRegCount = 0;
6390 for (FunctionType::param_iterator I = FTy->param_begin(),
6391 E = FTy->param_end(); I != E; ++I, ++Idx)
6392 if (Attrs.paramHasAttr(Idx, Attribute::InReg))
6393 // FIXME: should only count parameters that are lowered to integers.
6394 InRegCount += (TD->getTypeSizeInBits(*I) + 31) / 32;
6396 if (InRegCount > 2) {
6397 cerr << "Nest register in use - reduce number of inreg parameters!\n";
6403 case CallingConv::X86_FastCall:
6404 case CallingConv::Fast:
6405 // Pass 'nest' parameter in EAX.
6406 // Must be kept in sync with X86CallingConv.td
6411 SDValue OutChains[4];
6414 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
6415 DAG.getConstant(10, MVT::i32));
6416 Disp = DAG.getNode(ISD::SUB, dl, MVT::i32, FPtr, Addr);
6418 const unsigned char MOV32ri = TII->getBaseOpcodeFor(X86::MOV32ri);
6419 const unsigned char N86Reg = RegInfo->getX86RegNum(NestReg);
6420 OutChains[0] = DAG.getStore(Root, dl,
6421 DAG.getConstant(MOV32ri|N86Reg, MVT::i8),
6424 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
6425 DAG.getConstant(1, MVT::i32));
6426 OutChains[1] = DAG.getStore(Root, dl, Nest, Addr, TrmpAddr, 1, false, 1);
6428 const unsigned char JMP = TII->getBaseOpcodeFor(X86::JMP);
6429 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
6430 DAG.getConstant(5, MVT::i32));
6431 OutChains[2] = DAG.getStore(Root, dl, DAG.getConstant(JMP, MVT::i8), Addr,
6432 TrmpAddr, 5, false, 1);
6434 Addr = DAG.getNode(ISD::ADD, dl, MVT::i32, Trmp,
6435 DAG.getConstant(6, MVT::i32));
6436 OutChains[3] = DAG.getStore(Root, dl, Disp, Addr, TrmpAddr, 6, false, 1);
6439 { Trmp, DAG.getNode(ISD::TokenFactor, dl, MVT::Other, OutChains, 4) };
6440 return DAG.getMergeValues(Ops, 2, dl);
6444 SDValue X86TargetLowering::LowerFLT_ROUNDS_(SDValue Op, SelectionDAG &DAG) {
6446 The rounding mode is in bits 11:10 of FPSR, and has the following
6453 FLT_ROUNDS, on the other hand, expects the following:
6460 To perform the conversion, we do:
6461 (((((FPSR & 0x800) >> 11) | ((FPSR & 0x400) >> 9)) + 1) & 3)
6464 MachineFunction &MF = DAG.getMachineFunction();
6465 const TargetMachine &TM = MF.getTarget();
6466 const TargetFrameInfo &TFI = *TM.getFrameInfo();
6467 unsigned StackAlignment = TFI.getStackAlignment();
6468 MVT VT = Op.getValueType();
6469 DebugLoc dl = Op.getDebugLoc();
6471 // Save FP Control Word to stack slot
6472 int SSFI = MF.getFrameInfo()->CreateStackObject(2, StackAlignment);
6473 SDValue StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
6475 SDValue Chain = DAG.getNode(X86ISD::FNSTCW16m, dl, MVT::Other,
6476 DAG.getEntryNode(), StackSlot);
6478 // Load FP Control Word from stack slot
6479 SDValue CWD = DAG.getLoad(MVT::i16, dl, Chain, StackSlot, NULL, 0);
6481 // Transform as necessary
6483 DAG.getNode(ISD::SRL, dl, MVT::i16,
6484 DAG.getNode(ISD::AND, dl, MVT::i16,
6485 CWD, DAG.getConstant(0x800, MVT::i16)),
6486 DAG.getConstant(11, MVT::i8));
6488 DAG.getNode(ISD::SRL, dl, MVT::i16,
6489 DAG.getNode(ISD::AND, dl, MVT::i16,
6490 CWD, DAG.getConstant(0x400, MVT::i16)),
6491 DAG.getConstant(9, MVT::i8));
6494 DAG.getNode(ISD::AND, dl, MVT::i16,
6495 DAG.getNode(ISD::ADD, dl, MVT::i16,
6496 DAG.getNode(ISD::OR, dl, MVT::i16, CWD1, CWD2),
6497 DAG.getConstant(1, MVT::i16)),
6498 DAG.getConstant(3, MVT::i16));
6501 return DAG.getNode((VT.getSizeInBits() < 16 ?
6502 ISD::TRUNCATE : ISD::ZERO_EXTEND), dl, VT, RetVal);
6505 SDValue X86TargetLowering::LowerCTLZ(SDValue Op, SelectionDAG &DAG) {
6506 MVT VT = Op.getValueType();
6508 unsigned NumBits = VT.getSizeInBits();
6509 DebugLoc dl = Op.getDebugLoc();
6511 Op = Op.getOperand(0);
6512 if (VT == MVT::i8) {
6513 // Zero extend to i32 since there is not an i8 bsr.
6515 Op = DAG.getNode(ISD::ZERO_EXTEND, dl, OpVT, Op);
6518 // Issue a bsr (scan bits in reverse) which also sets EFLAGS.
6519 SDVTList VTs = DAG.getVTList(OpVT, MVT::i32);
6520 Op = DAG.getNode(X86ISD::BSR, dl, VTs, Op);
6522 // If src is zero (i.e. bsr sets ZF), returns NumBits.
6523 SmallVector<SDValue, 4> Ops;
6525 Ops.push_back(DAG.getConstant(NumBits+NumBits-1, OpVT));
6526 Ops.push_back(DAG.getConstant(X86::COND_E, MVT::i8));
6527 Ops.push_back(Op.getValue(1));
6528 Op = DAG.getNode(X86ISD::CMOV, dl, OpVT, &Ops[0], 4);
6530 // Finally xor with NumBits-1.
6531 Op = DAG.getNode(ISD::XOR, dl, OpVT, Op, DAG.getConstant(NumBits-1, OpVT));
6534 Op = DAG.getNode(ISD::TRUNCATE, dl, MVT::i8, Op);
6538 SDValue X86TargetLowering::LowerCTTZ(SDValue Op, SelectionDAG &DAG) {
6539 MVT VT = Op.getValueType();
6541 unsigned NumBits = VT.getSizeInBits();
6542 DebugLoc dl = Op.getDebugLoc();
6544 Op = Op.getOperand(0);
6545 if (VT == MVT::i8) {
6547 Op = DAG.getNode(ISD::ZERO_EXTEND, dl, OpVT, Op);
6550 // Issue a bsf (scan bits forward) which also sets EFLAGS.
6551 SDVTList VTs = DAG.getVTList(OpVT, MVT::i32);
6552 Op = DAG.getNode(X86ISD::BSF, dl, VTs, Op);
6554 // If src is zero (i.e. bsf sets ZF), returns NumBits.
6555 SmallVector<SDValue, 4> Ops;
6557 Ops.push_back(DAG.getConstant(NumBits, OpVT));
6558 Ops.push_back(DAG.getConstant(X86::COND_E, MVT::i8));
6559 Ops.push_back(Op.getValue(1));
6560 Op = DAG.getNode(X86ISD::CMOV, dl, OpVT, &Ops[0], 4);
6563 Op = DAG.getNode(ISD::TRUNCATE, dl, MVT::i8, Op);
6567 SDValue X86TargetLowering::LowerMUL_V2I64(SDValue Op, SelectionDAG &DAG) {
6568 MVT VT = Op.getValueType();
6569 assert(VT == MVT::v2i64 && "Only know how to lower V2I64 multiply");
6570 DebugLoc dl = Op.getDebugLoc();
6572 // ulong2 Ahi = __builtin_ia32_psrlqi128( a, 32);
6573 // ulong2 Bhi = __builtin_ia32_psrlqi128( b, 32);
6574 // ulong2 AloBlo = __builtin_ia32_pmuludq128( a, b );
6575 // ulong2 AloBhi = __builtin_ia32_pmuludq128( a, Bhi );
6576 // ulong2 AhiBlo = __builtin_ia32_pmuludq128( Ahi, b );
6578 // AloBhi = __builtin_ia32_psllqi128( AloBhi, 32 );
6579 // AhiBlo = __builtin_ia32_psllqi128( AhiBlo, 32 );
6580 // return AloBlo + AloBhi + AhiBlo;
6582 SDValue A = Op.getOperand(0);
6583 SDValue B = Op.getOperand(1);
6585 SDValue Ahi = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
6586 DAG.getConstant(Intrinsic::x86_sse2_psrli_q, MVT::i32),
6587 A, DAG.getConstant(32, MVT::i32));
6588 SDValue Bhi = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
6589 DAG.getConstant(Intrinsic::x86_sse2_psrli_q, MVT::i32),
6590 B, DAG.getConstant(32, MVT::i32));
6591 SDValue AloBlo = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
6592 DAG.getConstant(Intrinsic::x86_sse2_pmulu_dq, MVT::i32),
6594 SDValue AloBhi = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
6595 DAG.getConstant(Intrinsic::x86_sse2_pmulu_dq, MVT::i32),
6597 SDValue AhiBlo = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
6598 DAG.getConstant(Intrinsic::x86_sse2_pmulu_dq, MVT::i32),
6600 AloBhi = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
6601 DAG.getConstant(Intrinsic::x86_sse2_pslli_q, MVT::i32),
6602 AloBhi, DAG.getConstant(32, MVT::i32));
6603 AhiBlo = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
6604 DAG.getConstant(Intrinsic::x86_sse2_pslli_q, MVT::i32),
6605 AhiBlo, DAG.getConstant(32, MVT::i32));
6606 SDValue Res = DAG.getNode(ISD::ADD, dl, VT, AloBlo, AloBhi);
6607 Res = DAG.getNode(ISD::ADD, dl, VT, Res, AhiBlo);
6612 SDValue X86TargetLowering::LowerXALUO(SDValue Op, SelectionDAG &DAG) {
6613 // Lower the "add/sub/mul with overflow" instruction into a regular ins plus
6614 // a "setcc" instruction that checks the overflow flag. The "brcond" lowering
6615 // looks for this combo and may remove the "setcc" instruction if the "setcc"
6616 // has only one use.
6617 SDNode *N = Op.getNode();
6618 SDValue LHS = N->getOperand(0);
6619 SDValue RHS = N->getOperand(1);
6620 unsigned BaseOp = 0;
6622 DebugLoc dl = Op.getDebugLoc();
6624 switch (Op.getOpcode()) {
6625 default: assert(0 && "Unknown ovf instruction!");
6627 BaseOp = X86ISD::ADD;
6631 BaseOp = X86ISD::ADD;
6635 BaseOp = X86ISD::SUB;
6639 BaseOp = X86ISD::SUB;
6643 BaseOp = X86ISD::SMUL;
6647 BaseOp = X86ISD::UMUL;
6652 // Also sets EFLAGS.
6653 SDVTList VTs = DAG.getVTList(N->getValueType(0), MVT::i32);
6654 SDValue Sum = DAG.getNode(BaseOp, dl, VTs, LHS, RHS);
6657 DAG.getNode(X86ISD::SETCC, dl, N->getValueType(1),
6658 DAG.getConstant(Cond, MVT::i32), SDValue(Sum.getNode(), 1));
6660 DAG.ReplaceAllUsesOfValueWith(SDValue(N, 1), SetCC);
6664 SDValue X86TargetLowering::LowerCMP_SWAP(SDValue Op, SelectionDAG &DAG) {
6665 MVT T = Op.getValueType();
6666 DebugLoc dl = Op.getDebugLoc();
6669 switch(T.getSimpleVT()) {
6671 assert(false && "Invalid value type!");
6672 case MVT::i8: Reg = X86::AL; size = 1; break;
6673 case MVT::i16: Reg = X86::AX; size = 2; break;
6674 case MVT::i32: Reg = X86::EAX; size = 4; break;
6676 assert(Subtarget->is64Bit() && "Node not type legal!");
6677 Reg = X86::RAX; size = 8;
6680 SDValue cpIn = DAG.getCopyToReg(Op.getOperand(0), dl, Reg,
6681 Op.getOperand(2), SDValue());
6682 SDValue Ops[] = { cpIn.getValue(0),
6685 DAG.getTargetConstant(size, MVT::i8),
6687 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Flag);
6688 SDValue Result = DAG.getNode(X86ISD::LCMPXCHG_DAG, dl, Tys, Ops, 5);
6690 DAG.getCopyFromReg(Result.getValue(0), dl, Reg, T, Result.getValue(1));
6694 SDValue X86TargetLowering::LowerREADCYCLECOUNTER(SDValue Op,
6695 SelectionDAG &DAG) {
6696 assert(Subtarget->is64Bit() && "Result not type legalized?");
6697 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Flag);
6698 SDValue TheChain = Op.getOperand(0);
6699 DebugLoc dl = Op.getDebugLoc();
6700 SDValue rd = DAG.getNode(X86ISD::RDTSC_DAG, dl, Tys, &TheChain, 1);
6701 SDValue rax = DAG.getCopyFromReg(rd, dl, X86::RAX, MVT::i64, rd.getValue(1));
6702 SDValue rdx = DAG.getCopyFromReg(rax.getValue(1), dl, X86::RDX, MVT::i64,
6704 SDValue Tmp = DAG.getNode(ISD::SHL, dl, MVT::i64, rdx,
6705 DAG.getConstant(32, MVT::i8));
6707 DAG.getNode(ISD::OR, dl, MVT::i64, rax, Tmp),
6710 return DAG.getMergeValues(Ops, 2, dl);
6713 SDValue X86TargetLowering::LowerLOAD_SUB(SDValue Op, SelectionDAG &DAG) {
6714 SDNode *Node = Op.getNode();
6715 DebugLoc dl = Node->getDebugLoc();
6716 MVT T = Node->getValueType(0);
6717 SDValue negOp = DAG.getNode(ISD::SUB, dl, T,
6718 DAG.getConstant(0, T), Node->getOperand(2));
6719 return DAG.getAtomic(ISD::ATOMIC_LOAD_ADD, dl,
6720 cast<AtomicSDNode>(Node)->getMemoryVT(),
6721 Node->getOperand(0),
6722 Node->getOperand(1), negOp,
6723 cast<AtomicSDNode>(Node)->getSrcValue(),
6724 cast<AtomicSDNode>(Node)->getAlignment());
6727 /// LowerOperation - Provide custom lowering hooks for some operations.
6729 SDValue X86TargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) {
6730 switch (Op.getOpcode()) {
6731 default: assert(0 && "Should not custom lower this!");
6732 case ISD::ATOMIC_CMP_SWAP: return LowerCMP_SWAP(Op,DAG);
6733 case ISD::ATOMIC_LOAD_SUB: return LowerLOAD_SUB(Op,DAG);
6734 case ISD::BUILD_VECTOR: return LowerBUILD_VECTOR(Op, DAG);
6735 case ISD::VECTOR_SHUFFLE: return LowerVECTOR_SHUFFLE(Op, DAG);
6736 case ISD::EXTRACT_VECTOR_ELT: return LowerEXTRACT_VECTOR_ELT(Op, DAG);
6737 case ISD::INSERT_VECTOR_ELT: return LowerINSERT_VECTOR_ELT(Op, DAG);
6738 case ISD::SCALAR_TO_VECTOR: return LowerSCALAR_TO_VECTOR(Op, DAG);
6739 case ISD::ConstantPool: return LowerConstantPool(Op, DAG);
6740 case ISD::GlobalAddress: return LowerGlobalAddress(Op, DAG);
6741 case ISD::GlobalTLSAddress: return LowerGlobalTLSAddress(Op, DAG);
6742 case ISD::ExternalSymbol: return LowerExternalSymbol(Op, DAG);
6743 case ISD::SHL_PARTS:
6744 case ISD::SRA_PARTS:
6745 case ISD::SRL_PARTS: return LowerShift(Op, DAG);
6746 case ISD::SINT_TO_FP: return LowerSINT_TO_FP(Op, DAG);
6747 case ISD::UINT_TO_FP: return LowerUINT_TO_FP(Op, DAG);
6748 case ISD::FP_TO_SINT: return LowerFP_TO_SINT(Op, DAG);
6749 case ISD::FABS: return LowerFABS(Op, DAG);
6750 case ISD::FNEG: return LowerFNEG(Op, DAG);
6751 case ISD::FCOPYSIGN: return LowerFCOPYSIGN(Op, DAG);
6752 case ISD::SETCC: return LowerSETCC(Op, DAG);
6753 case ISD::VSETCC: return LowerVSETCC(Op, DAG);
6754 case ISD::SELECT: return LowerSELECT(Op, DAG);
6755 case ISD::BRCOND: return LowerBRCOND(Op, DAG);
6756 case ISD::JumpTable: return LowerJumpTable(Op, DAG);
6757 case ISD::CALL: return LowerCALL(Op, DAG);
6758 case ISD::RET: return LowerRET(Op, DAG);
6759 case ISD::FORMAL_ARGUMENTS: return LowerFORMAL_ARGUMENTS(Op, DAG);
6760 case ISD::VASTART: return LowerVASTART(Op, DAG);
6761 case ISD::VAARG: return LowerVAARG(Op, DAG);
6762 case ISD::VACOPY: return LowerVACOPY(Op, DAG);
6763 case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG);
6764 case ISD::RETURNADDR: return LowerRETURNADDR(Op, DAG);
6765 case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
6766 case ISD::FRAME_TO_ARGS_OFFSET:
6767 return LowerFRAME_TO_ARGS_OFFSET(Op, DAG);
6768 case ISD::DYNAMIC_STACKALLOC: return LowerDYNAMIC_STACKALLOC(Op, DAG);
6769 case ISD::EH_RETURN: return LowerEH_RETURN(Op, DAG);
6770 case ISD::TRAMPOLINE: return LowerTRAMPOLINE(Op, DAG);
6771 case ISD::FLT_ROUNDS_: return LowerFLT_ROUNDS_(Op, DAG);
6772 case ISD::CTLZ: return LowerCTLZ(Op, DAG);
6773 case ISD::CTTZ: return LowerCTTZ(Op, DAG);
6774 case ISD::MUL: return LowerMUL_V2I64(Op, DAG);
6780 case ISD::UMULO: return LowerXALUO(Op, DAG);
6781 case ISD::READCYCLECOUNTER: return LowerREADCYCLECOUNTER(Op, DAG);
6785 void X86TargetLowering::
6786 ReplaceATOMIC_BINARY_64(SDNode *Node, SmallVectorImpl<SDValue>&Results,
6787 SelectionDAG &DAG, unsigned NewOp) {
6788 MVT T = Node->getValueType(0);
6789 DebugLoc dl = Node->getDebugLoc();
6790 assert (T == MVT::i64 && "Only know how to expand i64 atomics");
6792 SDValue Chain = Node->getOperand(0);
6793 SDValue In1 = Node->getOperand(1);
6794 SDValue In2L = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
6795 Node->getOperand(2), DAG.getIntPtrConstant(0));
6796 SDValue In2H = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
6797 Node->getOperand(2), DAG.getIntPtrConstant(1));
6798 // This is a generalized SDNode, not an AtomicSDNode, so it doesn't
6799 // have a MemOperand. Pass the info through as a normal operand.
6800 SDValue LSI = DAG.getMemOperand(cast<MemSDNode>(Node)->getMemOperand());
6801 SDValue Ops[] = { Chain, In1, In2L, In2H, LSI };
6802 SDVTList Tys = DAG.getVTList(MVT::i32, MVT::i32, MVT::Other);
6803 SDValue Result = DAG.getNode(NewOp, dl, Tys, Ops, 5);
6804 SDValue OpsF[] = { Result.getValue(0), Result.getValue(1)};
6805 Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, OpsF, 2));
6806 Results.push_back(Result.getValue(2));
6809 /// ReplaceNodeResults - Replace a node with an illegal result type
6810 /// with a new node built out of custom code.
6811 void X86TargetLowering::ReplaceNodeResults(SDNode *N,
6812 SmallVectorImpl<SDValue>&Results,
6813 SelectionDAG &DAG) {
6814 DebugLoc dl = N->getDebugLoc();
6815 switch (N->getOpcode()) {
6817 assert(false && "Do not know how to custom type legalize this operation!");
6819 case ISD::FP_TO_SINT: {
6820 std::pair<SDValue,SDValue> Vals = FP_TO_SINTHelper(SDValue(N, 0), DAG);
6821 SDValue FIST = Vals.first, StackSlot = Vals.second;
6822 if (FIST.getNode() != 0) {
6823 MVT VT = N->getValueType(0);
6824 // Return a load from the stack slot.
6825 Results.push_back(DAG.getLoad(VT, dl, FIST, StackSlot, NULL, 0));
6829 case ISD::READCYCLECOUNTER: {
6830 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Flag);
6831 SDValue TheChain = N->getOperand(0);
6832 SDValue rd = DAG.getNode(X86ISD::RDTSC_DAG, dl, Tys, &TheChain, 1);
6833 SDValue eax = DAG.getCopyFromReg(rd, dl, X86::EAX, MVT::i32,
6835 SDValue edx = DAG.getCopyFromReg(eax.getValue(1), dl, X86::EDX, MVT::i32,
6837 // Use a buildpair to merge the two 32-bit values into a 64-bit one.
6838 SDValue Ops[] = { eax, edx };
6839 Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Ops, 2));
6840 Results.push_back(edx.getValue(1));
6843 case ISD::ATOMIC_CMP_SWAP: {
6844 MVT T = N->getValueType(0);
6845 assert (T == MVT::i64 && "Only know how to expand i64 Cmp and Swap");
6846 SDValue cpInL, cpInH;
6847 cpInL = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(2),
6848 DAG.getConstant(0, MVT::i32));
6849 cpInH = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(2),
6850 DAG.getConstant(1, MVT::i32));
6851 cpInL = DAG.getCopyToReg(N->getOperand(0), dl, X86::EAX, cpInL, SDValue());
6852 cpInH = DAG.getCopyToReg(cpInL.getValue(0), dl, X86::EDX, cpInH,
6854 SDValue swapInL, swapInH;
6855 swapInL = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(3),
6856 DAG.getConstant(0, MVT::i32));
6857 swapInH = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(3),
6858 DAG.getConstant(1, MVT::i32));
6859 swapInL = DAG.getCopyToReg(cpInH.getValue(0), dl, X86::EBX, swapInL,
6861 swapInH = DAG.getCopyToReg(swapInL.getValue(0), dl, X86::ECX, swapInH,
6862 swapInL.getValue(1));
6863 SDValue Ops[] = { swapInH.getValue(0),
6865 swapInH.getValue(1) };
6866 SDVTList Tys = DAG.getVTList(MVT::Other, MVT::Flag);
6867 SDValue Result = DAG.getNode(X86ISD::LCMPXCHG8_DAG, dl, Tys, Ops, 3);
6868 SDValue cpOutL = DAG.getCopyFromReg(Result.getValue(0), dl, X86::EAX,
6869 MVT::i32, Result.getValue(1));
6870 SDValue cpOutH = DAG.getCopyFromReg(cpOutL.getValue(1), dl, X86::EDX,
6871 MVT::i32, cpOutL.getValue(2));
6872 SDValue OpsF[] = { cpOutL.getValue(0), cpOutH.getValue(0)};
6873 Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, OpsF, 2));
6874 Results.push_back(cpOutH.getValue(1));
6877 case ISD::ATOMIC_LOAD_ADD:
6878 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMADD64_DAG);
6880 case ISD::ATOMIC_LOAD_AND:
6881 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMAND64_DAG);
6883 case ISD::ATOMIC_LOAD_NAND:
6884 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMNAND64_DAG);
6886 case ISD::ATOMIC_LOAD_OR:
6887 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMOR64_DAG);
6889 case ISD::ATOMIC_LOAD_SUB:
6890 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMSUB64_DAG);
6892 case ISD::ATOMIC_LOAD_XOR:
6893 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMXOR64_DAG);
6895 case ISD::ATOMIC_SWAP:
6896 ReplaceATOMIC_BINARY_64(N, Results, DAG, X86ISD::ATOMSWAP64_DAG);
6901 const char *X86TargetLowering::getTargetNodeName(unsigned Opcode) const {
6903 default: return NULL;
6904 case X86ISD::BSF: return "X86ISD::BSF";
6905 case X86ISD::BSR: return "X86ISD::BSR";
6906 case X86ISD::SHLD: return "X86ISD::SHLD";
6907 case X86ISD::SHRD: return "X86ISD::SHRD";
6908 case X86ISD::FAND: return "X86ISD::FAND";
6909 case X86ISD::FOR: return "X86ISD::FOR";
6910 case X86ISD::FXOR: return "X86ISD::FXOR";
6911 case X86ISD::FSRL: return "X86ISD::FSRL";
6912 case X86ISD::FILD: return "X86ISD::FILD";
6913 case X86ISD::FILD_FLAG: return "X86ISD::FILD_FLAG";
6914 case X86ISD::FP_TO_INT16_IN_MEM: return "X86ISD::FP_TO_INT16_IN_MEM";
6915 case X86ISD::FP_TO_INT32_IN_MEM: return "X86ISD::FP_TO_INT32_IN_MEM";
6916 case X86ISD::FP_TO_INT64_IN_MEM: return "X86ISD::FP_TO_INT64_IN_MEM";
6917 case X86ISD::FLD: return "X86ISD::FLD";
6918 case X86ISD::FST: return "X86ISD::FST";
6919 case X86ISD::CALL: return "X86ISD::CALL";
6920 case X86ISD::TAILCALL: return "X86ISD::TAILCALL";
6921 case X86ISD::RDTSC_DAG: return "X86ISD::RDTSC_DAG";
6922 case X86ISD::BT: return "X86ISD::BT";
6923 case X86ISD::CMP: return "X86ISD::CMP";
6924 case X86ISD::COMI: return "X86ISD::COMI";
6925 case X86ISD::UCOMI: return "X86ISD::UCOMI";
6926 case X86ISD::SETCC: return "X86ISD::SETCC";
6927 case X86ISD::CMOV: return "X86ISD::CMOV";
6928 case X86ISD::BRCOND: return "X86ISD::BRCOND";
6929 case X86ISD::RET_FLAG: return "X86ISD::RET_FLAG";
6930 case X86ISD::REP_STOS: return "X86ISD::REP_STOS";
6931 case X86ISD::REP_MOVS: return "X86ISD::REP_MOVS";
6932 case X86ISD::GlobalBaseReg: return "X86ISD::GlobalBaseReg";
6933 case X86ISD::Wrapper: return "X86ISD::Wrapper";
6934 case X86ISD::PEXTRB: return "X86ISD::PEXTRB";
6935 case X86ISD::PEXTRW: return "X86ISD::PEXTRW";
6936 case X86ISD::INSERTPS: return "X86ISD::INSERTPS";
6937 case X86ISD::PINSRB: return "X86ISD::PINSRB";
6938 case X86ISD::PINSRW: return "X86ISD::PINSRW";
6939 case X86ISD::PSHUFB: return "X86ISD::PSHUFB";
6940 case X86ISD::FMAX: return "X86ISD::FMAX";
6941 case X86ISD::FMIN: return "X86ISD::FMIN";
6942 case X86ISD::FRSQRT: return "X86ISD::FRSQRT";
6943 case X86ISD::FRCP: return "X86ISD::FRCP";
6944 case X86ISD::TLSADDR: return "X86ISD::TLSADDR";
6945 case X86ISD::THREAD_POINTER: return "X86ISD::THREAD_POINTER";
6946 case X86ISD::EH_RETURN: return "X86ISD::EH_RETURN";
6947 case X86ISD::TC_RETURN: return "X86ISD::TC_RETURN";
6948 case X86ISD::FNSTCW16m: return "X86ISD::FNSTCW16m";
6949 case X86ISD::LCMPXCHG_DAG: return "X86ISD::LCMPXCHG_DAG";
6950 case X86ISD::LCMPXCHG8_DAG: return "X86ISD::LCMPXCHG8_DAG";
6951 case X86ISD::ATOMADD64_DAG: return "X86ISD::ATOMADD64_DAG";
6952 case X86ISD::ATOMSUB64_DAG: return "X86ISD::ATOMSUB64_DAG";
6953 case X86ISD::ATOMOR64_DAG: return "X86ISD::ATOMOR64_DAG";
6954 case X86ISD::ATOMXOR64_DAG: return "X86ISD::ATOMXOR64_DAG";
6955 case X86ISD::ATOMAND64_DAG: return "X86ISD::ATOMAND64_DAG";
6956 case X86ISD::ATOMNAND64_DAG: return "X86ISD::ATOMNAND64_DAG";
6957 case X86ISD::VZEXT_MOVL: return "X86ISD::VZEXT_MOVL";
6958 case X86ISD::VZEXT_LOAD: return "X86ISD::VZEXT_LOAD";
6959 case X86ISD::VSHL: return "X86ISD::VSHL";
6960 case X86ISD::VSRL: return "X86ISD::VSRL";
6961 case X86ISD::CMPPD: return "X86ISD::CMPPD";
6962 case X86ISD::CMPPS: return "X86ISD::CMPPS";
6963 case X86ISD::PCMPEQB: return "X86ISD::PCMPEQB";
6964 case X86ISD::PCMPEQW: return "X86ISD::PCMPEQW";
6965 case X86ISD::PCMPEQD: return "X86ISD::PCMPEQD";
6966 case X86ISD::PCMPEQQ: return "X86ISD::PCMPEQQ";
6967 case X86ISD::PCMPGTB: return "X86ISD::PCMPGTB";
6968 case X86ISD::PCMPGTW: return "X86ISD::PCMPGTW";
6969 case X86ISD::PCMPGTD: return "X86ISD::PCMPGTD";
6970 case X86ISD::PCMPGTQ: return "X86ISD::PCMPGTQ";
6971 case X86ISD::ADD: return "X86ISD::ADD";
6972 case X86ISD::SUB: return "X86ISD::SUB";
6973 case X86ISD::SMUL: return "X86ISD::SMUL";
6974 case X86ISD::UMUL: return "X86ISD::UMUL";
6978 // isLegalAddressingMode - Return true if the addressing mode represented
6979 // by AM is legal for this target, for a load/store of the specified type.
6980 bool X86TargetLowering::isLegalAddressingMode(const AddrMode &AM,
6981 const Type *Ty) const {
6982 // X86 supports extremely general addressing modes.
6984 // X86 allows a sign-extended 32-bit immediate field as a displacement.
6985 if (AM.BaseOffs <= -(1LL << 32) || AM.BaseOffs >= (1LL << 32)-1)
6989 // We can only fold this if we don't need an extra load.
6990 if (Subtarget->GVRequiresExtraLoad(AM.BaseGV, getTargetMachine(), false))
6992 // If BaseGV requires a register, we cannot also have a BaseReg.
6993 if (Subtarget->GVRequiresRegister(AM.BaseGV, getTargetMachine(), false) &&
6997 // X86-64 only supports addr of globals in small code model.
6998 if (Subtarget->is64Bit()) {
6999 if (getTargetMachine().getCodeModel() != CodeModel::Small)
7001 // If lower 4G is not available, then we must use rip-relative addressing.
7002 if (AM.BaseOffs || AM.Scale > 1)
7013 // These scales always work.
7018 // These scales are formed with basereg+scalereg. Only accept if there is
7023 default: // Other stuff never works.
7031 bool X86TargetLowering::isTruncateFree(const Type *Ty1, const Type *Ty2) const {
7032 if (!Ty1->isInteger() || !Ty2->isInteger())
7034 unsigned NumBits1 = Ty1->getPrimitiveSizeInBits();
7035 unsigned NumBits2 = Ty2->getPrimitiveSizeInBits();
7036 if (NumBits1 <= NumBits2)
7038 return Subtarget->is64Bit() || NumBits1 < 64;
7041 bool X86TargetLowering::isTruncateFree(MVT VT1, MVT VT2) const {
7042 if (!VT1.isInteger() || !VT2.isInteger())
7044 unsigned NumBits1 = VT1.getSizeInBits();
7045 unsigned NumBits2 = VT2.getSizeInBits();
7046 if (NumBits1 <= NumBits2)
7048 return Subtarget->is64Bit() || NumBits1 < 64;
7051 /// isShuffleMaskLegal - Targets can use this to indicate that they only
7052 /// support *some* VECTOR_SHUFFLE operations, those with specific masks.
7053 /// By default, if a target supports the VECTOR_SHUFFLE node, all mask values
7054 /// are assumed to be legal.
7056 X86TargetLowering::isShuffleMaskLegal(SDValue Mask, MVT VT) const {
7057 // Only do shuffles on 128-bit vector types for now.
7058 // FIXME: pshufb, blends
7059 if (VT.getSizeInBits() == 64) return false;
7060 return (Mask.getNode()->getNumOperands() <= 4 ||
7061 isIdentityMask(Mask.getNode()) ||
7062 isIdentityMask(Mask.getNode(), true) ||
7063 isSplatMask(Mask.getNode()) ||
7064 X86::isPSHUFHWMask(Mask.getNode()) ||
7065 X86::isPSHUFLWMask(Mask.getNode()) ||
7066 X86::isUNPCKLMask(Mask.getNode()) ||
7067 X86::isUNPCKHMask(Mask.getNode()) ||
7068 X86::isUNPCKL_v_undef_Mask(Mask.getNode()) ||
7069 X86::isUNPCKH_v_undef_Mask(Mask.getNode()));
7073 X86TargetLowering::isVectorClearMaskLegal(const std::vector<SDValue> &BVOps,
7074 MVT EVT, SelectionDAG &DAG) const {
7075 unsigned NumElts = BVOps.size();
7076 // Only do shuffles on 128-bit vector types for now.
7077 if (EVT.getSizeInBits() * NumElts == 64) return false;
7078 if (NumElts == 2) return true;
7080 return (isMOVLMask(&BVOps[0], 4) ||
7081 isCommutedMOVL(&BVOps[0], 4, true) ||
7082 isSHUFPMask(&BVOps[0], 4) ||
7083 isCommutedSHUFP(&BVOps[0], 4));
7088 //===----------------------------------------------------------------------===//
7089 // X86 Scheduler Hooks
7090 //===----------------------------------------------------------------------===//
7092 // private utility function
7094 X86TargetLowering::EmitAtomicBitwiseWithCustomInserter(MachineInstr *bInstr,
7095 MachineBasicBlock *MBB,
7103 TargetRegisterClass *RC,
7104 bool invSrc) const {
7105 // For the atomic bitwise operator, we generate
7108 // ld t1 = [bitinstr.addr]
7109 // op t2 = t1, [bitinstr.val]
7111 // lcs dest = [bitinstr.addr], t2 [EAX is implicit]
7113 // fallthrough -->nextMBB
7114 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
7115 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
7116 MachineFunction::iterator MBBIter = MBB;
7119 /// First build the CFG
7120 MachineFunction *F = MBB->getParent();
7121 MachineBasicBlock *thisMBB = MBB;
7122 MachineBasicBlock *newMBB = F->CreateMachineBasicBlock(LLVM_BB);
7123 MachineBasicBlock *nextMBB = F->CreateMachineBasicBlock(LLVM_BB);
7124 F->insert(MBBIter, newMBB);
7125 F->insert(MBBIter, nextMBB);
7127 // Move all successors to thisMBB to nextMBB
7128 nextMBB->transferSuccessors(thisMBB);
7130 // Update thisMBB to fall through to newMBB
7131 thisMBB->addSuccessor(newMBB);
7133 // newMBB jumps to itself and fall through to nextMBB
7134 newMBB->addSuccessor(nextMBB);
7135 newMBB->addSuccessor(newMBB);
7137 // Insert instructions into newMBB based on incoming instruction
7138 assert(bInstr->getNumOperands() < 8 && "unexpected number of operands");
7139 DebugLoc dl = bInstr->getDebugLoc();
7140 MachineOperand& destOper = bInstr->getOperand(0);
7141 MachineOperand* argOpers[6];
7142 int numArgs = bInstr->getNumOperands() - 1;
7143 for (int i=0; i < numArgs; ++i)
7144 argOpers[i] = &bInstr->getOperand(i+1);
7146 // x86 address has 4 operands: base, index, scale, and displacement
7147 int lastAddrIndx = 3; // [0,3]
7150 unsigned t1 = F->getRegInfo().createVirtualRegister(RC);
7151 MachineInstrBuilder MIB = BuildMI(newMBB, dl, TII->get(LoadOpc), t1);
7152 for (int i=0; i <= lastAddrIndx; ++i)
7153 (*MIB).addOperand(*argOpers[i]);
7155 unsigned tt = F->getRegInfo().createVirtualRegister(RC);
7157 MIB = BuildMI(newMBB, dl, TII->get(notOpc), tt).addReg(t1);
7162 unsigned t2 = F->getRegInfo().createVirtualRegister(RC);
7163 assert((argOpers[valArgIndx]->isReg() ||
7164 argOpers[valArgIndx]->isImm()) &&
7166 if (argOpers[valArgIndx]->isReg())
7167 MIB = BuildMI(newMBB, dl, TII->get(regOpc), t2);
7169 MIB = BuildMI(newMBB, dl, TII->get(immOpc), t2);
7171 (*MIB).addOperand(*argOpers[valArgIndx]);
7173 MIB = BuildMI(newMBB, dl, TII->get(copyOpc), EAXreg);
7176 MIB = BuildMI(newMBB, dl, TII->get(CXchgOpc));
7177 for (int i=0; i <= lastAddrIndx; ++i)
7178 (*MIB).addOperand(*argOpers[i]);
7180 assert(bInstr->hasOneMemOperand() && "Unexpected number of memoperand");
7181 (*MIB).addMemOperand(*F, *bInstr->memoperands_begin());
7183 MIB = BuildMI(newMBB, dl, TII->get(copyOpc), destOper.getReg());
7187 BuildMI(newMBB, dl, TII->get(X86::JNE)).addMBB(newMBB);
7189 F->DeleteMachineInstr(bInstr); // The pseudo instruction is gone now.
7193 // private utility function: 64 bit atomics on 32 bit host.
7195 X86TargetLowering::EmitAtomicBit6432WithCustomInserter(MachineInstr *bInstr,
7196 MachineBasicBlock *MBB,
7201 bool invSrc) const {
7202 // For the atomic bitwise operator, we generate
7203 // thisMBB (instructions are in pairs, except cmpxchg8b)
7204 // ld t1,t2 = [bitinstr.addr]
7206 // out1, out2 = phi (thisMBB, t1/t2) (newMBB, t3/t4)
7207 // op t5, t6 <- out1, out2, [bitinstr.val]
7208 // (for SWAP, substitute: mov t5, t6 <- [bitinstr.val])
7209 // mov ECX, EBX <- t5, t6
7210 // mov EAX, EDX <- t1, t2
7211 // cmpxchg8b [bitinstr.addr] [EAX, EDX, EBX, ECX implicit]
7212 // mov t3, t4 <- EAX, EDX
7214 // result in out1, out2
7215 // fallthrough -->nextMBB
7217 const TargetRegisterClass *RC = X86::GR32RegisterClass;
7218 const unsigned LoadOpc = X86::MOV32rm;
7219 const unsigned copyOpc = X86::MOV32rr;
7220 const unsigned NotOpc = X86::NOT32r;
7221 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
7222 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
7223 MachineFunction::iterator MBBIter = MBB;
7226 /// First build the CFG
7227 MachineFunction *F = MBB->getParent();
7228 MachineBasicBlock *thisMBB = MBB;
7229 MachineBasicBlock *newMBB = F->CreateMachineBasicBlock(LLVM_BB);
7230 MachineBasicBlock *nextMBB = F->CreateMachineBasicBlock(LLVM_BB);
7231 F->insert(MBBIter, newMBB);
7232 F->insert(MBBIter, nextMBB);
7234 // Move all successors to thisMBB to nextMBB
7235 nextMBB->transferSuccessors(thisMBB);
7237 // Update thisMBB to fall through to newMBB
7238 thisMBB->addSuccessor(newMBB);
7240 // newMBB jumps to itself and fall through to nextMBB
7241 newMBB->addSuccessor(nextMBB);
7242 newMBB->addSuccessor(newMBB);
7244 DebugLoc dl = bInstr->getDebugLoc();
7245 // Insert instructions into newMBB based on incoming instruction
7246 // There are 8 "real" operands plus 9 implicit def/uses, ignored here.
7247 assert(bInstr->getNumOperands() < 18 && "unexpected number of operands");
7248 MachineOperand& dest1Oper = bInstr->getOperand(0);
7249 MachineOperand& dest2Oper = bInstr->getOperand(1);
7250 MachineOperand* argOpers[6];
7251 for (int i=0; i < 6; ++i)
7252 argOpers[i] = &bInstr->getOperand(i+2);
7254 // x86 address has 4 operands: base, index, scale, and displacement
7255 int lastAddrIndx = 3; // [0,3]
7257 unsigned t1 = F->getRegInfo().createVirtualRegister(RC);
7258 MachineInstrBuilder MIB = BuildMI(thisMBB, dl, TII->get(LoadOpc), t1);
7259 for (int i=0; i <= lastAddrIndx; ++i)
7260 (*MIB).addOperand(*argOpers[i]);
7261 unsigned t2 = F->getRegInfo().createVirtualRegister(RC);
7262 MIB = BuildMI(thisMBB, dl, TII->get(LoadOpc), t2);
7263 // add 4 to displacement.
7264 for (int i=0; i <= lastAddrIndx-1; ++i)
7265 (*MIB).addOperand(*argOpers[i]);
7266 MachineOperand newOp3 = *(argOpers[3]);
7268 newOp3.setImm(newOp3.getImm()+4);
7270 newOp3.setOffset(newOp3.getOffset()+4);
7271 (*MIB).addOperand(newOp3);
7273 // t3/4 are defined later, at the bottom of the loop
7274 unsigned t3 = F->getRegInfo().createVirtualRegister(RC);
7275 unsigned t4 = F->getRegInfo().createVirtualRegister(RC);
7276 BuildMI(newMBB, dl, TII->get(X86::PHI), dest1Oper.getReg())
7277 .addReg(t1).addMBB(thisMBB).addReg(t3).addMBB(newMBB);
7278 BuildMI(newMBB, dl, TII->get(X86::PHI), dest2Oper.getReg())
7279 .addReg(t2).addMBB(thisMBB).addReg(t4).addMBB(newMBB);
7281 unsigned tt1 = F->getRegInfo().createVirtualRegister(RC);
7282 unsigned tt2 = F->getRegInfo().createVirtualRegister(RC);
7284 MIB = BuildMI(newMBB, dl, TII->get(NotOpc), tt1).addReg(t1);
7285 MIB = BuildMI(newMBB, dl, TII->get(NotOpc), tt2).addReg(t2);
7291 assert((argOpers[4]->isReg() || argOpers[4]->isImm()) &&
7293 unsigned t5 = F->getRegInfo().createVirtualRegister(RC);
7294 unsigned t6 = F->getRegInfo().createVirtualRegister(RC);
7295 if (argOpers[4]->isReg())
7296 MIB = BuildMI(newMBB, dl, TII->get(regOpcL), t5);
7298 MIB = BuildMI(newMBB, dl, TII->get(immOpcL), t5);
7299 if (regOpcL != X86::MOV32rr)
7301 (*MIB).addOperand(*argOpers[4]);
7302 assert(argOpers[5]->isReg() == argOpers[4]->isReg());
7303 assert(argOpers[5]->isImm() == argOpers[4]->isImm());
7304 if (argOpers[5]->isReg())
7305 MIB = BuildMI(newMBB, dl, TII->get(regOpcH), t6);
7307 MIB = BuildMI(newMBB, dl, TII->get(immOpcH), t6);
7308 if (regOpcH != X86::MOV32rr)
7310 (*MIB).addOperand(*argOpers[5]);
7312 MIB = BuildMI(newMBB, dl, TII->get(copyOpc), X86::EAX);
7314 MIB = BuildMI(newMBB, dl, TII->get(copyOpc), X86::EDX);
7317 MIB = BuildMI(newMBB, dl, TII->get(copyOpc), X86::EBX);
7319 MIB = BuildMI(newMBB, dl, TII->get(copyOpc), X86::ECX);
7322 MIB = BuildMI(newMBB, dl, TII->get(X86::LCMPXCHG8B));
7323 for (int i=0; i <= lastAddrIndx; ++i)
7324 (*MIB).addOperand(*argOpers[i]);
7326 assert(bInstr->hasOneMemOperand() && "Unexpected number of memoperand");
7327 (*MIB).addMemOperand(*F, *bInstr->memoperands_begin());
7329 MIB = BuildMI(newMBB, dl, TII->get(copyOpc), t3);
7330 MIB.addReg(X86::EAX);
7331 MIB = BuildMI(newMBB, dl, TII->get(copyOpc), t4);
7332 MIB.addReg(X86::EDX);
7335 BuildMI(newMBB, dl, TII->get(X86::JNE)).addMBB(newMBB);
7337 F->DeleteMachineInstr(bInstr); // The pseudo instruction is gone now.
7341 // private utility function
7343 X86TargetLowering::EmitAtomicMinMaxWithCustomInserter(MachineInstr *mInstr,
7344 MachineBasicBlock *MBB,
7345 unsigned cmovOpc) const {
7346 // For the atomic min/max operator, we generate
7349 // ld t1 = [min/max.addr]
7350 // mov t2 = [min/max.val]
7352 // cmov[cond] t2 = t1
7354 // lcs dest = [bitinstr.addr], t2 [EAX is implicit]
7356 // fallthrough -->nextMBB
7358 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
7359 const BasicBlock *LLVM_BB = MBB->getBasicBlock();
7360 MachineFunction::iterator MBBIter = MBB;
7363 /// First build the CFG
7364 MachineFunction *F = MBB->getParent();
7365 MachineBasicBlock *thisMBB = MBB;
7366 MachineBasicBlock *newMBB = F->CreateMachineBasicBlock(LLVM_BB);
7367 MachineBasicBlock *nextMBB = F->CreateMachineBasicBlock(LLVM_BB);
7368 F->insert(MBBIter, newMBB);
7369 F->insert(MBBIter, nextMBB);
7371 // Move all successors to thisMBB to nextMBB
7372 nextMBB->transferSuccessors(thisMBB);
7374 // Update thisMBB to fall through to newMBB
7375 thisMBB->addSuccessor(newMBB);
7377 // newMBB jumps to newMBB and fall through to nextMBB
7378 newMBB->addSuccessor(nextMBB);
7379 newMBB->addSuccessor(newMBB);
7381 DebugLoc dl = mInstr->getDebugLoc();
7382 // Insert instructions into newMBB based on incoming instruction
7383 assert(mInstr->getNumOperands() < 8 && "unexpected number of operands");
7384 MachineOperand& destOper = mInstr->getOperand(0);
7385 MachineOperand* argOpers[6];
7386 int numArgs = mInstr->getNumOperands() - 1;
7387 for (int i=0; i < numArgs; ++i)
7388 argOpers[i] = &mInstr->getOperand(i+1);
7390 // x86 address has 4 operands: base, index, scale, and displacement
7391 int lastAddrIndx = 3; // [0,3]
7394 unsigned t1 = F->getRegInfo().createVirtualRegister(X86::GR32RegisterClass);
7395 MachineInstrBuilder MIB = BuildMI(newMBB, dl, TII->get(X86::MOV32rm), t1);
7396 for (int i=0; i <= lastAddrIndx; ++i)
7397 (*MIB).addOperand(*argOpers[i]);
7399 // We only support register and immediate values
7400 assert((argOpers[valArgIndx]->isReg() ||
7401 argOpers[valArgIndx]->isImm()) &&
7404 unsigned t2 = F->getRegInfo().createVirtualRegister(X86::GR32RegisterClass);
7405 if (argOpers[valArgIndx]->isReg())
7406 MIB = BuildMI(newMBB, dl, TII->get(X86::MOV32rr), t2);
7408 MIB = BuildMI(newMBB, dl, TII->get(X86::MOV32rr), t2);
7409 (*MIB).addOperand(*argOpers[valArgIndx]);
7411 MIB = BuildMI(newMBB, dl, TII->get(X86::MOV32rr), X86::EAX);
7414 MIB = BuildMI(newMBB, dl, TII->get(X86::CMP32rr));
7419 unsigned t3 = F->getRegInfo().createVirtualRegister(X86::GR32RegisterClass);
7420 MIB = BuildMI(newMBB, dl, TII->get(cmovOpc),t3);
7424 // Cmp and exchange if none has modified the memory location
7425 MIB = BuildMI(newMBB, dl, TII->get(X86::LCMPXCHG32));
7426 for (int i=0; i <= lastAddrIndx; ++i)
7427 (*MIB).addOperand(*argOpers[i]);
7429 assert(mInstr->hasOneMemOperand() && "Unexpected number of memoperand");
7430 (*MIB).addMemOperand(*F, *mInstr->memoperands_begin());
7432 MIB = BuildMI(newMBB, dl, TII->get(X86::MOV32rr), destOper.getReg());
7433 MIB.addReg(X86::EAX);
7436 BuildMI(newMBB, dl, TII->get(X86::JNE)).addMBB(newMBB);
7438 F->DeleteMachineInstr(mInstr); // The pseudo instruction is gone now.
7444 X86TargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
7445 MachineBasicBlock *BB) const {
7446 DebugLoc dl = MI->getDebugLoc();
7447 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
7448 switch (MI->getOpcode()) {
7449 default: assert(false && "Unexpected instr type to insert");
7450 case X86::CMOV_V1I64:
7451 case X86::CMOV_FR32:
7452 case X86::CMOV_FR64:
7453 case X86::CMOV_V4F32:
7454 case X86::CMOV_V2F64:
7455 case X86::CMOV_V2I64: {
7456 // To "insert" a SELECT_CC instruction, we actually have to insert the
7457 // diamond control-flow pattern. The incoming instruction knows the
7458 // destination vreg to set, the condition code register to branch on, the
7459 // true/false values to select between, and a branch opcode to use.
7460 const BasicBlock *LLVM_BB = BB->getBasicBlock();
7461 MachineFunction::iterator It = BB;
7467 // cmpTY ccX, r1, r2
7469 // fallthrough --> copy0MBB
7470 MachineBasicBlock *thisMBB = BB;
7471 MachineFunction *F = BB->getParent();
7472 MachineBasicBlock *copy0MBB = F->CreateMachineBasicBlock(LLVM_BB);
7473 MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB);
7475 X86::GetCondBranchFromCond((X86::CondCode)MI->getOperand(3).getImm());
7476 BuildMI(BB, dl, TII->get(Opc)).addMBB(sinkMBB);
7477 F->insert(It, copy0MBB);
7478 F->insert(It, sinkMBB);
7479 // Update machine-CFG edges by transferring all successors of the current
7480 // block to the new block which will contain the Phi node for the select.
7481 sinkMBB->transferSuccessors(BB);
7483 // Add the true and fallthrough blocks as its successors.
7484 BB->addSuccessor(copy0MBB);
7485 BB->addSuccessor(sinkMBB);
7488 // %FalseValue = ...
7489 // # fallthrough to sinkMBB
7492 // Update machine-CFG edges
7493 BB->addSuccessor(sinkMBB);
7496 // %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
7499 BuildMI(BB, dl, TII->get(X86::PHI), MI->getOperand(0).getReg())
7500 .addReg(MI->getOperand(1).getReg()).addMBB(copy0MBB)
7501 .addReg(MI->getOperand(2).getReg()).addMBB(thisMBB);
7503 F->DeleteMachineInstr(MI); // The pseudo instruction is gone now.
7507 case X86::FP32_TO_INT16_IN_MEM:
7508 case X86::FP32_TO_INT32_IN_MEM:
7509 case X86::FP32_TO_INT64_IN_MEM:
7510 case X86::FP64_TO_INT16_IN_MEM:
7511 case X86::FP64_TO_INT32_IN_MEM:
7512 case X86::FP64_TO_INT64_IN_MEM:
7513 case X86::FP80_TO_INT16_IN_MEM:
7514 case X86::FP80_TO_INT32_IN_MEM:
7515 case X86::FP80_TO_INT64_IN_MEM: {
7516 // Change the floating point control register to use "round towards zero"
7517 // mode when truncating to an integer value.
7518 MachineFunction *F = BB->getParent();
7519 int CWFrameIdx = F->getFrameInfo()->CreateStackObject(2, 2);
7520 addFrameReference(BuildMI(BB, dl, TII->get(X86::FNSTCW16m)), CWFrameIdx);
7522 // Load the old value of the high byte of the control word...
7524 F->getRegInfo().createVirtualRegister(X86::GR16RegisterClass);
7525 addFrameReference(BuildMI(BB, dl, TII->get(X86::MOV16rm), OldCW),
7528 // Set the high part to be round to zero...
7529 addFrameReference(BuildMI(BB, dl, TII->get(X86::MOV16mi)), CWFrameIdx)
7532 // Reload the modified control word now...
7533 addFrameReference(BuildMI(BB, dl, TII->get(X86::FLDCW16m)), CWFrameIdx);
7535 // Restore the memory image of control word to original value
7536 addFrameReference(BuildMI(BB, dl, TII->get(X86::MOV16mr)), CWFrameIdx)
7539 // Get the X86 opcode to use.
7541 switch (MI->getOpcode()) {
7542 default: assert(0 && "illegal opcode!");
7543 case X86::FP32_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m32; break;
7544 case X86::FP32_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m32; break;
7545 case X86::FP32_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m32; break;
7546 case X86::FP64_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m64; break;
7547 case X86::FP64_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m64; break;
7548 case X86::FP64_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m64; break;
7549 case X86::FP80_TO_INT16_IN_MEM: Opc = X86::IST_Fp16m80; break;
7550 case X86::FP80_TO_INT32_IN_MEM: Opc = X86::IST_Fp32m80; break;
7551 case X86::FP80_TO_INT64_IN_MEM: Opc = X86::IST_Fp64m80; break;
7555 MachineOperand &Op = MI->getOperand(0);
7557 AM.BaseType = X86AddressMode::RegBase;
7558 AM.Base.Reg = Op.getReg();
7560 AM.BaseType = X86AddressMode::FrameIndexBase;
7561 AM.Base.FrameIndex = Op.getIndex();
7563 Op = MI->getOperand(1);
7565 AM.Scale = Op.getImm();
7566 Op = MI->getOperand(2);
7568 AM.IndexReg = Op.getImm();
7569 Op = MI->getOperand(3);
7570 if (Op.isGlobal()) {
7571 AM.GV = Op.getGlobal();
7573 AM.Disp = Op.getImm();
7575 addFullAddress(BuildMI(BB, dl, TII->get(Opc)), AM)
7576 .addReg(MI->getOperand(4).getReg());
7578 // Reload the original control word now.
7579 addFrameReference(BuildMI(BB, dl, TII->get(X86::FLDCW16m)), CWFrameIdx);
7581 F->DeleteMachineInstr(MI); // The pseudo instruction is gone now.
7584 case X86::ATOMAND32:
7585 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND32rr,
7586 X86::AND32ri, X86::MOV32rm,
7587 X86::LCMPXCHG32, X86::MOV32rr,
7588 X86::NOT32r, X86::EAX,
7589 X86::GR32RegisterClass);
7591 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::OR32rr,
7592 X86::OR32ri, X86::MOV32rm,
7593 X86::LCMPXCHG32, X86::MOV32rr,
7594 X86::NOT32r, X86::EAX,
7595 X86::GR32RegisterClass);
7596 case X86::ATOMXOR32:
7597 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::XOR32rr,
7598 X86::XOR32ri, X86::MOV32rm,
7599 X86::LCMPXCHG32, X86::MOV32rr,
7600 X86::NOT32r, X86::EAX,
7601 X86::GR32RegisterClass);
7602 case X86::ATOMNAND32:
7603 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND32rr,
7604 X86::AND32ri, X86::MOV32rm,
7605 X86::LCMPXCHG32, X86::MOV32rr,
7606 X86::NOT32r, X86::EAX,
7607 X86::GR32RegisterClass, true);
7608 case X86::ATOMMIN32:
7609 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVL32rr);
7610 case X86::ATOMMAX32:
7611 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVG32rr);
7612 case X86::ATOMUMIN32:
7613 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVB32rr);
7614 case X86::ATOMUMAX32:
7615 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVA32rr);
7617 case X86::ATOMAND16:
7618 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND16rr,
7619 X86::AND16ri, X86::MOV16rm,
7620 X86::LCMPXCHG16, X86::MOV16rr,
7621 X86::NOT16r, X86::AX,
7622 X86::GR16RegisterClass);
7624 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::OR16rr,
7625 X86::OR16ri, X86::MOV16rm,
7626 X86::LCMPXCHG16, X86::MOV16rr,
7627 X86::NOT16r, X86::AX,
7628 X86::GR16RegisterClass);
7629 case X86::ATOMXOR16:
7630 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::XOR16rr,
7631 X86::XOR16ri, X86::MOV16rm,
7632 X86::LCMPXCHG16, X86::MOV16rr,
7633 X86::NOT16r, X86::AX,
7634 X86::GR16RegisterClass);
7635 case X86::ATOMNAND16:
7636 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND16rr,
7637 X86::AND16ri, X86::MOV16rm,
7638 X86::LCMPXCHG16, X86::MOV16rr,
7639 X86::NOT16r, X86::AX,
7640 X86::GR16RegisterClass, true);
7641 case X86::ATOMMIN16:
7642 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVL16rr);
7643 case X86::ATOMMAX16:
7644 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVG16rr);
7645 case X86::ATOMUMIN16:
7646 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVB16rr);
7647 case X86::ATOMUMAX16:
7648 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVA16rr);
7651 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND8rr,
7652 X86::AND8ri, X86::MOV8rm,
7653 X86::LCMPXCHG8, X86::MOV8rr,
7654 X86::NOT8r, X86::AL,
7655 X86::GR8RegisterClass);
7657 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::OR8rr,
7658 X86::OR8ri, X86::MOV8rm,
7659 X86::LCMPXCHG8, X86::MOV8rr,
7660 X86::NOT8r, X86::AL,
7661 X86::GR8RegisterClass);
7663 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::XOR8rr,
7664 X86::XOR8ri, X86::MOV8rm,
7665 X86::LCMPXCHG8, X86::MOV8rr,
7666 X86::NOT8r, X86::AL,
7667 X86::GR8RegisterClass);
7668 case X86::ATOMNAND8:
7669 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND8rr,
7670 X86::AND8ri, X86::MOV8rm,
7671 X86::LCMPXCHG8, X86::MOV8rr,
7672 X86::NOT8r, X86::AL,
7673 X86::GR8RegisterClass, true);
7674 // FIXME: There are no CMOV8 instructions; MIN/MAX need some other way.
7675 // This group is for 64-bit host.
7676 case X86::ATOMAND64:
7677 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND64rr,
7678 X86::AND64ri32, X86::MOV64rm,
7679 X86::LCMPXCHG64, X86::MOV64rr,
7680 X86::NOT64r, X86::RAX,
7681 X86::GR64RegisterClass);
7683 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::OR64rr,
7684 X86::OR64ri32, X86::MOV64rm,
7685 X86::LCMPXCHG64, X86::MOV64rr,
7686 X86::NOT64r, X86::RAX,
7687 X86::GR64RegisterClass);
7688 case X86::ATOMXOR64:
7689 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::XOR64rr,
7690 X86::XOR64ri32, X86::MOV64rm,
7691 X86::LCMPXCHG64, X86::MOV64rr,
7692 X86::NOT64r, X86::RAX,
7693 X86::GR64RegisterClass);
7694 case X86::ATOMNAND64:
7695 return EmitAtomicBitwiseWithCustomInserter(MI, BB, X86::AND64rr,
7696 X86::AND64ri32, X86::MOV64rm,
7697 X86::LCMPXCHG64, X86::MOV64rr,
7698 X86::NOT64r, X86::RAX,
7699 X86::GR64RegisterClass, true);
7700 case X86::ATOMMIN64:
7701 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVL64rr);
7702 case X86::ATOMMAX64:
7703 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVG64rr);
7704 case X86::ATOMUMIN64:
7705 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVB64rr);
7706 case X86::ATOMUMAX64:
7707 return EmitAtomicMinMaxWithCustomInserter(MI, BB, X86::CMOVA64rr);
7709 // This group does 64-bit operations on a 32-bit host.
7710 case X86::ATOMAND6432:
7711 return EmitAtomicBit6432WithCustomInserter(MI, BB,
7712 X86::AND32rr, X86::AND32rr,
7713 X86::AND32ri, X86::AND32ri,
7715 case X86::ATOMOR6432:
7716 return EmitAtomicBit6432WithCustomInserter(MI, BB,
7717 X86::OR32rr, X86::OR32rr,
7718 X86::OR32ri, X86::OR32ri,
7720 case X86::ATOMXOR6432:
7721 return EmitAtomicBit6432WithCustomInserter(MI, BB,
7722 X86::XOR32rr, X86::XOR32rr,
7723 X86::XOR32ri, X86::XOR32ri,
7725 case X86::ATOMNAND6432:
7726 return EmitAtomicBit6432WithCustomInserter(MI, BB,
7727 X86::AND32rr, X86::AND32rr,
7728 X86::AND32ri, X86::AND32ri,
7730 case X86::ATOMADD6432:
7731 return EmitAtomicBit6432WithCustomInserter(MI, BB,
7732 X86::ADD32rr, X86::ADC32rr,
7733 X86::ADD32ri, X86::ADC32ri,
7735 case X86::ATOMSUB6432:
7736 return EmitAtomicBit6432WithCustomInserter(MI, BB,
7737 X86::SUB32rr, X86::SBB32rr,
7738 X86::SUB32ri, X86::SBB32ri,
7740 case X86::ATOMSWAP6432:
7741 return EmitAtomicBit6432WithCustomInserter(MI, BB,
7742 X86::MOV32rr, X86::MOV32rr,
7743 X86::MOV32ri, X86::MOV32ri,
7748 //===----------------------------------------------------------------------===//
7749 // X86 Optimization Hooks
7750 //===----------------------------------------------------------------------===//
7752 void X86TargetLowering::computeMaskedBitsForTargetNode(const SDValue Op,
7756 const SelectionDAG &DAG,
7757 unsigned Depth) const {
7758 unsigned Opc = Op.getOpcode();
7759 assert((Opc >= ISD::BUILTIN_OP_END ||
7760 Opc == ISD::INTRINSIC_WO_CHAIN ||
7761 Opc == ISD::INTRINSIC_W_CHAIN ||
7762 Opc == ISD::INTRINSIC_VOID) &&
7763 "Should use MaskedValueIsZero if you don't know whether Op"
7764 " is a target node!");
7766 KnownZero = KnownOne = APInt(Mask.getBitWidth(), 0); // Don't know anything.
7773 // These nodes' second result is a boolean.
7774 if (Op.getResNo() == 0)
7778 KnownZero |= APInt::getHighBitsSet(Mask.getBitWidth(),
7779 Mask.getBitWidth() - 1);
7784 /// isGAPlusOffset - Returns true (and the GlobalValue and the offset) if the
7785 /// node is a GlobalAddress + offset.
7786 bool X86TargetLowering::isGAPlusOffset(SDNode *N,
7787 GlobalValue* &GA, int64_t &Offset) const{
7788 if (N->getOpcode() == X86ISD::Wrapper) {
7789 if (isa<GlobalAddressSDNode>(N->getOperand(0))) {
7790 GA = cast<GlobalAddressSDNode>(N->getOperand(0))->getGlobal();
7791 Offset = cast<GlobalAddressSDNode>(N->getOperand(0))->getOffset();
7795 return TargetLowering::isGAPlusOffset(N, GA, Offset);
7798 static bool isBaseAlignmentOfN(unsigned N, SDNode *Base,
7799 const TargetLowering &TLI) {
7802 if (TLI.isGAPlusOffset(Base, GV, Offset))
7803 return (GV->getAlignment() >= N && (Offset % N) == 0);
7804 // DAG combine handles the stack object case.
7808 static bool EltsFromConsecutiveLoads(SDNode *N, SDValue PermMask,
7809 unsigned NumElems, MVT EVT,
7811 SelectionDAG &DAG, MachineFrameInfo *MFI,
7812 const TargetLowering &TLI) {
7814 for (unsigned i = 0; i < NumElems; ++i) {
7815 SDValue Idx = PermMask.getOperand(i);
7816 if (Idx.getOpcode() == ISD::UNDEF) {
7822 SDValue Elt = DAG.getShuffleScalarElt(N, i);
7823 if (!Elt.getNode() ||
7824 (Elt.getOpcode() != ISD::UNDEF && !ISD::isNON_EXTLoad(Elt.getNode())))
7827 Base = Elt.getNode();
7828 if (Base->getOpcode() == ISD::UNDEF)
7832 if (Elt.getOpcode() == ISD::UNDEF)
7835 if (!TLI.isConsecutiveLoad(Elt.getNode(), Base,
7836 EVT.getSizeInBits()/8, i, MFI))
7842 /// PerformShuffleCombine - Combine a vector_shuffle that is equal to
7843 /// build_vector load1, load2, load3, load4, <0, 1, 2, 3> into a 128-bit load
7844 /// if the load addresses are consecutive, non-overlapping, and in the right
7846 static SDValue PerformShuffleCombine(SDNode *N, SelectionDAG &DAG,
7847 const TargetLowering &TLI) {
7848 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
7849 DebugLoc dl = N->getDebugLoc();
7850 MVT VT = N->getValueType(0);
7851 MVT EVT = VT.getVectorElementType();
7852 SDValue PermMask = N->getOperand(2);
7853 unsigned NumElems = PermMask.getNumOperands();
7854 SDNode *Base = NULL;
7855 if (!EltsFromConsecutiveLoads(N, PermMask, NumElems, EVT, Base,
7859 LoadSDNode *LD = cast<LoadSDNode>(Base);
7860 if (isBaseAlignmentOfN(16, Base->getOperand(1).getNode(), TLI))
7861 return DAG.getLoad(VT, dl, LD->getChain(), LD->getBasePtr(),
7862 LD->getSrcValue(), LD->getSrcValueOffset(),
7864 return DAG.getLoad(VT, dl, LD->getChain(), LD->getBasePtr(),
7865 LD->getSrcValue(), LD->getSrcValueOffset(),
7866 LD->isVolatile(), LD->getAlignment());
7869 /// PerformBuildVectorCombine - build_vector 0,(load i64 / f64) -> movq / movsd.
7870 static SDValue PerformBuildVectorCombine(SDNode *N, SelectionDAG &DAG,
7871 TargetLowering::DAGCombinerInfo &DCI,
7872 const X86Subtarget *Subtarget,
7873 const TargetLowering &TLI) {
7874 unsigned NumOps = N->getNumOperands();
7875 DebugLoc dl = N->getDebugLoc();
7877 // Ignore single operand BUILD_VECTOR.
7881 MVT VT = N->getValueType(0);
7882 MVT EVT = VT.getVectorElementType();
7883 if ((EVT != MVT::i64 && EVT != MVT::f64) || Subtarget->is64Bit())
7884 // We are looking for load i64 and zero extend. We want to transform
7885 // it before legalizer has a chance to expand it. Also look for i64
7886 // BUILD_PAIR bit casted to f64.
7888 // This must be an insertion into a zero vector.
7889 SDValue HighElt = N->getOperand(1);
7890 if (!isZeroNode(HighElt))
7893 // Value must be a load.
7894 SDNode *Base = N->getOperand(0).getNode();
7895 if (!isa<LoadSDNode>(Base)) {
7896 if (Base->getOpcode() != ISD::BIT_CONVERT)
7898 Base = Base->getOperand(0).getNode();
7899 if (!isa<LoadSDNode>(Base))
7903 // Transform it into VZEXT_LOAD addr.
7904 LoadSDNode *LD = cast<LoadSDNode>(Base);
7906 // Load must not be an extload.
7907 if (LD->getExtensionType() != ISD::NON_EXTLOAD)
7910 // Load type should legal type so we don't have to legalize it.
7911 if (!TLI.isTypeLegal(VT))
7914 SDVTList Tys = DAG.getVTList(VT, MVT::Other);
7915 SDValue Ops[] = { LD->getChain(), LD->getBasePtr() };
7916 SDValue ResNode = DAG.getNode(X86ISD::VZEXT_LOAD, dl, Tys, Ops, 2);
7917 TargetLowering::TargetLoweringOpt TLO(DAG);
7918 TLO.CombineTo(SDValue(Base, 1), ResNode.getValue(1));
7919 DCI.CommitTargetLoweringOpt(TLO);
7923 /// PerformSELECTCombine - Do target-specific dag combines on SELECT nodes.
7924 static SDValue PerformSELECTCombine(SDNode *N, SelectionDAG &DAG,
7925 const X86Subtarget *Subtarget) {
7926 DebugLoc dl = N->getDebugLoc();
7927 SDValue Cond = N->getOperand(0);
7929 // If we have SSE[12] support, try to form min/max nodes.
7930 if (Subtarget->hasSSE2() &&
7931 (N->getValueType(0) == MVT::f32 || N->getValueType(0) == MVT::f64)) {
7932 if (Cond.getOpcode() == ISD::SETCC) {
7933 // Get the LHS/RHS of the select.
7934 SDValue LHS = N->getOperand(1);
7935 SDValue RHS = N->getOperand(2);
7936 ISD::CondCode CC = cast<CondCodeSDNode>(Cond.getOperand(2))->get();
7938 unsigned Opcode = 0;
7939 if (LHS == Cond.getOperand(0) && RHS == Cond.getOperand(1)) {
7942 case ISD::SETOLE: // (X <= Y) ? X : Y -> min
7945 if (!UnsafeFPMath) break;
7947 case ISD::SETOLT: // (X olt/lt Y) ? X : Y -> min
7949 Opcode = X86ISD::FMIN;
7952 case ISD::SETOGT: // (X > Y) ? X : Y -> max
7955 if (!UnsafeFPMath) break;
7957 case ISD::SETUGE: // (X uge/ge Y) ? X : Y -> max
7959 Opcode = X86ISD::FMAX;
7962 } else if (LHS == Cond.getOperand(1) && RHS == Cond.getOperand(0)) {
7965 case ISD::SETOGT: // (X > Y) ? Y : X -> min
7968 if (!UnsafeFPMath) break;
7970 case ISD::SETUGE: // (X uge/ge Y) ? Y : X -> min
7972 Opcode = X86ISD::FMIN;
7975 case ISD::SETOLE: // (X <= Y) ? Y : X -> max
7978 if (!UnsafeFPMath) break;
7980 case ISD::SETOLT: // (X olt/lt Y) ? Y : X -> max
7982 Opcode = X86ISD::FMAX;
7988 return DAG.getNode(Opcode, dl, N->getValueType(0), LHS, RHS);
7996 /// PerformShiftCombine - Transforms vector shift nodes to use vector shifts
7998 static SDValue PerformShiftCombine(SDNode* N, SelectionDAG &DAG,
7999 const X86Subtarget *Subtarget) {
8000 // On X86 with SSE2 support, we can transform this to a vector shift if
8001 // all elements are shifted by the same amount. We can't do this in legalize
8002 // because the a constant vector is typically transformed to a constant pool
8003 // so we have no knowledge of the shift amount.
8004 if (!Subtarget->hasSSE2())
8007 MVT VT = N->getValueType(0);
8008 if (VT != MVT::v2i64 && VT != MVT::v4i32 && VT != MVT::v8i16)
8011 SDValue ShAmtOp = N->getOperand(1);
8012 MVT EltVT = VT.getVectorElementType();
8013 DebugLoc dl = N->getDebugLoc();
8015 if (ShAmtOp.getOpcode() == ISD::BUILD_VECTOR) {
8016 unsigned NumElts = VT.getVectorNumElements();
8018 for (; i != NumElts; ++i) {
8019 SDValue Arg = ShAmtOp.getOperand(i);
8020 if (Arg.getOpcode() == ISD::UNDEF) continue;
8024 for (; i != NumElts; ++i) {
8025 SDValue Arg = ShAmtOp.getOperand(i);
8026 if (Arg.getOpcode() == ISD::UNDEF) continue;
8027 if (Arg != BaseShAmt) {
8031 } else if (ShAmtOp.getOpcode() == ISD::VECTOR_SHUFFLE &&
8032 isSplatMask(ShAmtOp.getOperand(2).getNode())) {
8033 BaseShAmt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, EltVT, ShAmtOp,
8034 DAG.getIntPtrConstant(0));
8038 if (EltVT.bitsGT(MVT::i32))
8039 BaseShAmt = DAG.getNode(ISD::TRUNCATE, dl, MVT::i32, BaseShAmt);
8040 else if (EltVT.bitsLT(MVT::i32))
8041 BaseShAmt = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, BaseShAmt);
8043 // The shift amount is identical so we can do a vector shift.
8044 SDValue ValOp = N->getOperand(0);
8045 switch (N->getOpcode()) {
8047 assert(0 && "Unknown shift opcode!");
8050 if (VT == MVT::v2i64)
8051 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8052 DAG.getConstant(Intrinsic::x86_sse2_pslli_q, MVT::i32),
8054 if (VT == MVT::v4i32)
8055 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8056 DAG.getConstant(Intrinsic::x86_sse2_pslli_d, MVT::i32),
8058 if (VT == MVT::v8i16)
8059 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8060 DAG.getConstant(Intrinsic::x86_sse2_pslli_w, MVT::i32),
8064 if (VT == MVT::v4i32)
8065 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8066 DAG.getConstant(Intrinsic::x86_sse2_psrai_d, MVT::i32),
8068 if (VT == MVT::v8i16)
8069 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8070 DAG.getConstant(Intrinsic::x86_sse2_psrai_w, MVT::i32),
8074 if (VT == MVT::v2i64)
8075 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8076 DAG.getConstant(Intrinsic::x86_sse2_psrli_q, MVT::i32),
8078 if (VT == MVT::v4i32)
8079 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8080 DAG.getConstant(Intrinsic::x86_sse2_psrli_d, MVT::i32),
8082 if (VT == MVT::v8i16)
8083 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
8084 DAG.getConstant(Intrinsic::x86_sse2_psrli_w, MVT::i32),
8091 /// PerformSTORECombine - Do target-specific dag combines on STORE nodes.
8092 static SDValue PerformSTORECombine(SDNode *N, SelectionDAG &DAG,
8093 const X86Subtarget *Subtarget) {
8094 // Turn load->store of MMX types into GPR load/stores. This avoids clobbering
8095 // the FP state in cases where an emms may be missing.
8096 // A preferable solution to the general problem is to figure out the right
8097 // places to insert EMMS. This qualifies as a quick hack.
8098 StoreSDNode *St = cast<StoreSDNode>(N);
8099 if (St->getValue().getValueType().isVector() &&
8100 St->getValue().getValueType().getSizeInBits() == 64 &&
8101 isa<LoadSDNode>(St->getValue()) &&
8102 !cast<LoadSDNode>(St->getValue())->isVolatile() &&
8103 St->getChain().hasOneUse() && !St->isVolatile()) {
8104 SDNode* LdVal = St->getValue().getNode();
8106 int TokenFactorIndex = -1;
8107 SmallVector<SDValue, 8> Ops;
8108 SDNode* ChainVal = St->getChain().getNode();
8109 // Must be a store of a load. We currently handle two cases: the load
8110 // is a direct child, and it's under an intervening TokenFactor. It is
8111 // possible to dig deeper under nested TokenFactors.
8112 if (ChainVal == LdVal)
8113 Ld = cast<LoadSDNode>(St->getChain());
8114 else if (St->getValue().hasOneUse() &&
8115 ChainVal->getOpcode() == ISD::TokenFactor) {
8116 for (unsigned i=0, e = ChainVal->getNumOperands(); i != e; ++i) {
8117 if (ChainVal->getOperand(i).getNode() == LdVal) {
8118 TokenFactorIndex = i;
8119 Ld = cast<LoadSDNode>(St->getValue());
8121 Ops.push_back(ChainVal->getOperand(i));
8125 DebugLoc dl = N->getDebugLoc();
8126 // If we are a 64-bit capable x86, lower to a single movq load/store pair.
8127 if (Subtarget->is64Bit()) {
8128 SDValue NewLd = DAG.getLoad(MVT::i64, dl, Ld->getChain(),
8129 Ld->getBasePtr(), Ld->getSrcValue(),
8130 Ld->getSrcValueOffset(), Ld->isVolatile(),
8131 Ld->getAlignment());
8132 SDValue NewChain = NewLd.getValue(1);
8133 if (TokenFactorIndex != -1) {
8134 Ops.push_back(NewChain);
8135 NewChain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, &Ops[0],
8138 return DAG.getStore(NewChain, dl, NewLd, St->getBasePtr(),
8139 St->getSrcValue(), St->getSrcValueOffset(),
8140 St->isVolatile(), St->getAlignment());
8143 // Otherwise, lower to two 32-bit copies.
8144 SDValue LoAddr = Ld->getBasePtr();
8145 SDValue HiAddr = DAG.getNode(ISD::ADD, dl, MVT::i32, LoAddr,
8146 DAG.getConstant(4, MVT::i32));
8148 SDValue LoLd = DAG.getLoad(MVT::i32, dl, Ld->getChain(), LoAddr,
8149 Ld->getSrcValue(), Ld->getSrcValueOffset(),
8150 Ld->isVolatile(), Ld->getAlignment());
8151 SDValue HiLd = DAG.getLoad(MVT::i32, dl, Ld->getChain(), HiAddr,
8152 Ld->getSrcValue(), Ld->getSrcValueOffset()+4,
8154 MinAlign(Ld->getAlignment(), 4));
8156 SDValue NewChain = LoLd.getValue(1);
8157 if (TokenFactorIndex != -1) {
8158 Ops.push_back(LoLd);
8159 Ops.push_back(HiLd);
8160 NewChain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, &Ops[0],
8164 LoAddr = St->getBasePtr();
8165 HiAddr = DAG.getNode(ISD::ADD, dl, MVT::i32, LoAddr,
8166 DAG.getConstant(4, MVT::i32));
8168 SDValue LoSt = DAG.getStore(NewChain, dl, LoLd, LoAddr,
8169 St->getSrcValue(), St->getSrcValueOffset(),
8170 St->isVolatile(), St->getAlignment());
8171 SDValue HiSt = DAG.getStore(NewChain, dl, HiLd, HiAddr,
8173 St->getSrcValueOffset() + 4,
8175 MinAlign(St->getAlignment(), 4));
8176 return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, LoSt, HiSt);
8182 /// PerformFORCombine - Do target-specific dag combines on X86ISD::FOR and
8183 /// X86ISD::FXOR nodes.
8184 static SDValue PerformFORCombine(SDNode *N, SelectionDAG &DAG) {
8185 assert(N->getOpcode() == X86ISD::FOR || N->getOpcode() == X86ISD::FXOR);
8186 // F[X]OR(0.0, x) -> x
8187 // F[X]OR(x, 0.0) -> x
8188 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(0)))
8189 if (C->getValueAPF().isPosZero())
8190 return N->getOperand(1);
8191 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(1)))
8192 if (C->getValueAPF().isPosZero())
8193 return N->getOperand(0);
8197 /// PerformFANDCombine - Do target-specific dag combines on X86ISD::FAND nodes.
8198 static SDValue PerformFANDCombine(SDNode *N, SelectionDAG &DAG) {
8199 // FAND(0.0, x) -> 0.0
8200 // FAND(x, 0.0) -> 0.0
8201 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(0)))
8202 if (C->getValueAPF().isPosZero())
8203 return N->getOperand(0);
8204 if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(N->getOperand(1)))
8205 if (C->getValueAPF().isPosZero())
8206 return N->getOperand(1);
8210 static SDValue PerformBTCombine(SDNode *N,
8212 TargetLowering::DAGCombinerInfo &DCI) {
8213 // BT ignores high bits in the bit index operand.
8214 SDValue Op1 = N->getOperand(1);
8215 if (Op1.hasOneUse()) {
8216 unsigned BitWidth = Op1.getValueSizeInBits();
8217 APInt DemandedMask = APInt::getLowBitsSet(BitWidth, Log2_32(BitWidth));
8218 APInt KnownZero, KnownOne;
8219 TargetLowering::TargetLoweringOpt TLO(DAG);
8220 TargetLowering &TLI = DAG.getTargetLoweringInfo();
8221 if (TLO.ShrinkDemandedConstant(Op1, DemandedMask) ||
8222 TLI.SimplifyDemandedBits(Op1, DemandedMask, KnownZero, KnownOne, TLO))
8223 DCI.CommitTargetLoweringOpt(TLO);
8228 SDValue X86TargetLowering::PerformDAGCombine(SDNode *N,
8229 DAGCombinerInfo &DCI) const {
8230 SelectionDAG &DAG = DCI.DAG;
8231 switch (N->getOpcode()) {
8233 case ISD::VECTOR_SHUFFLE: return PerformShuffleCombine(N, DAG, *this);
8234 case ISD::BUILD_VECTOR:
8235 return PerformBuildVectorCombine(N, DAG, DCI, Subtarget, *this);
8236 case ISD::SELECT: return PerformSELECTCombine(N, DAG, Subtarget);
8239 case ISD::SRL: return PerformShiftCombine(N, DAG, Subtarget);
8240 case ISD::STORE: return PerformSTORECombine(N, DAG, Subtarget);
8242 case X86ISD::FOR: return PerformFORCombine(N, DAG);
8243 case X86ISD::FAND: return PerformFANDCombine(N, DAG);
8244 case X86ISD::BT: return PerformBTCombine(N, DAG, DCI);
8250 //===----------------------------------------------------------------------===//
8251 // X86 Inline Assembly Support
8252 //===----------------------------------------------------------------------===//
8254 /// getConstraintType - Given a constraint letter, return the type of
8255 /// constraint it is for this target.
8256 X86TargetLowering::ConstraintType
8257 X86TargetLowering::getConstraintType(const std::string &Constraint) const {
8258 if (Constraint.size() == 1) {
8259 switch (Constraint[0]) {
8271 return C_RegisterClass;
8279 return TargetLowering::getConstraintType(Constraint);
8282 /// LowerXConstraint - try to replace an X constraint, which matches anything,
8283 /// with another that has more specific requirements based on the type of the
8284 /// corresponding operand.
8285 const char *X86TargetLowering::
8286 LowerXConstraint(MVT ConstraintVT) const {
8287 // FP X constraints get lowered to SSE1/2 registers if available, otherwise
8288 // 'f' like normal targets.
8289 if (ConstraintVT.isFloatingPoint()) {
8290 if (Subtarget->hasSSE2())
8292 if (Subtarget->hasSSE1())
8296 return TargetLowering::LowerXConstraint(ConstraintVT);
8299 /// LowerAsmOperandForConstraint - Lower the specified operand into the Ops
8300 /// vector. If it is invalid, don't add anything to Ops.
8301 void X86TargetLowering::LowerAsmOperandForConstraint(SDValue Op,
8304 std::vector<SDValue>&Ops,
8305 SelectionDAG &DAG) const {
8306 SDValue Result(0, 0);
8308 switch (Constraint) {
8311 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
8312 if (C->getZExtValue() <= 31) {
8313 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
8319 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
8320 if (C->getZExtValue() <= 63) {
8321 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
8327 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
8328 if (C->getZExtValue() <= 255) {
8329 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
8335 // 32-bit signed value
8336 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
8337 const ConstantInt *CI = C->getConstantIntValue();
8338 if (CI->isValueValidForType(Type::Int32Ty, C->getSExtValue())) {
8339 // Widen to 64 bits here to get it sign extended.
8340 Result = DAG.getTargetConstant(C->getSExtValue(), MVT::i64);
8343 // FIXME gcc accepts some relocatable values here too, but only in certain
8344 // memory models; it's complicated.
8349 // 32-bit unsigned value
8350 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
8351 const ConstantInt *CI = C->getConstantIntValue();
8352 if (CI->isValueValidForType(Type::Int32Ty, C->getZExtValue())) {
8353 Result = DAG.getTargetConstant(C->getZExtValue(), Op.getValueType());
8357 // FIXME gcc accepts some relocatable values here too, but only in certain
8358 // memory models; it's complicated.
8362 // Literal immediates are always ok.
8363 if (ConstantSDNode *CST = dyn_cast<ConstantSDNode>(Op)) {
8364 // Widen to 64 bits here to get it sign extended.
8365 Result = DAG.getTargetConstant(CST->getSExtValue(), MVT::i64);
8369 // If we are in non-pic codegen mode, we allow the address of a global (with
8370 // an optional displacement) to be used with 'i'.
8371 GlobalAddressSDNode *GA = dyn_cast<GlobalAddressSDNode>(Op);
8374 // Match either (GA) or (GA+C)
8376 Offset = GA->getOffset();
8377 } else if (Op.getOpcode() == ISD::ADD) {
8378 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op.getOperand(1));
8379 GA = dyn_cast<GlobalAddressSDNode>(Op.getOperand(0));
8381 Offset = GA->getOffset()+C->getZExtValue();
8383 C = dyn_cast<ConstantSDNode>(Op.getOperand(1));
8384 GA = dyn_cast<GlobalAddressSDNode>(Op.getOperand(0));
8386 Offset = GA->getOffset()+C->getZExtValue();
8394 Op = LowerGlobalAddress(GA->getGlobal(), Op.getDebugLoc(),
8397 Op = DAG.getTargetGlobalAddress(GA->getGlobal(), GA->getValueType(0),
8403 // Otherwise, not valid for this mode.
8408 if (Result.getNode()) {
8409 Ops.push_back(Result);
8412 return TargetLowering::LowerAsmOperandForConstraint(Op, Constraint, hasMemory,
8416 std::vector<unsigned> X86TargetLowering::
8417 getRegClassForInlineAsmConstraint(const std::string &Constraint,
8419 if (Constraint.size() == 1) {
8420 // FIXME: not handling fp-stack yet!
8421 switch (Constraint[0]) { // GCC X86 Constraint Letters
8422 default: break; // Unknown constraint letter
8423 case 'q': // Q_REGS (GENERAL_REGS in 64-bit mode)
8426 return make_vector<unsigned>(X86::EAX, X86::EDX, X86::ECX, X86::EBX, 0);
8427 else if (VT == MVT::i16)
8428 return make_vector<unsigned>(X86::AX, X86::DX, X86::CX, X86::BX, 0);
8429 else if (VT == MVT::i8)
8430 return make_vector<unsigned>(X86::AL, X86::DL, X86::CL, X86::BL, 0);
8431 else if (VT == MVT::i64)
8432 return make_vector<unsigned>(X86::RAX, X86::RDX, X86::RCX, X86::RBX, 0);
8437 return std::vector<unsigned>();
8440 std::pair<unsigned, const TargetRegisterClass*>
8441 X86TargetLowering::getRegForInlineAsmConstraint(const std::string &Constraint,
8443 // First, see if this is a constraint that directly corresponds to an LLVM
8445 if (Constraint.size() == 1) {
8446 // GCC Constraint Letters
8447 switch (Constraint[0]) {
8449 case 'r': // GENERAL_REGS
8450 case 'R': // LEGACY_REGS
8451 case 'l': // INDEX_REGS
8453 return std::make_pair(0U, X86::GR8RegisterClass);
8455 return std::make_pair(0U, X86::GR16RegisterClass);
8456 if (VT == MVT::i32 || !Subtarget->is64Bit())
8457 return std::make_pair(0U, X86::GR32RegisterClass);
8458 return std::make_pair(0U, X86::GR64RegisterClass);
8459 case 'f': // FP Stack registers.
8460 // If SSE is enabled for this VT, use f80 to ensure the isel moves the
8461 // value to the correct fpstack register class.
8462 if (VT == MVT::f32 && !isScalarFPTypeInSSEReg(VT))
8463 return std::make_pair(0U, X86::RFP32RegisterClass);
8464 if (VT == MVT::f64 && !isScalarFPTypeInSSEReg(VT))
8465 return std::make_pair(0U, X86::RFP64RegisterClass);
8466 return std::make_pair(0U, X86::RFP80RegisterClass);
8467 case 'y': // MMX_REGS if MMX allowed.
8468 if (!Subtarget->hasMMX()) break;
8469 return std::make_pair(0U, X86::VR64RegisterClass);
8470 case 'Y': // SSE_REGS if SSE2 allowed
8471 if (!Subtarget->hasSSE2()) break;
8473 case 'x': // SSE_REGS if SSE1 allowed
8474 if (!Subtarget->hasSSE1()) break;
8476 switch (VT.getSimpleVT()) {
8478 // Scalar SSE types.
8481 return std::make_pair(0U, X86::FR32RegisterClass);
8484 return std::make_pair(0U, X86::FR64RegisterClass);
8492 return std::make_pair(0U, X86::VR128RegisterClass);
8498 // Use the default implementation in TargetLowering to convert the register
8499 // constraint into a member of a register class.
8500 std::pair<unsigned, const TargetRegisterClass*> Res;
8501 Res = TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
8503 // Not found as a standard register?
8504 if (Res.second == 0) {
8505 // GCC calls "st(0)" just plain "st".
8506 if (StringsEqualNoCase("{st}", Constraint)) {
8507 Res.first = X86::ST0;
8508 Res.second = X86::RFP80RegisterClass;
8510 // 'A' means EAX + EDX.
8511 if (Constraint == "A") {
8512 Res.first = X86::EAX;
8513 Res.second = X86::GRADRegisterClass;
8518 // Otherwise, check to see if this is a register class of the wrong value
8519 // type. For example, we want to map "{ax},i32" -> {eax}, we don't want it to
8520 // turn into {ax},{dx}.
8521 if (Res.second->hasType(VT))
8522 return Res; // Correct type already, nothing to do.
8524 // All of the single-register GCC register classes map their values onto
8525 // 16-bit register pieces "ax","dx","cx","bx","si","di","bp","sp". If we
8526 // really want an 8-bit or 32-bit register, map to the appropriate register
8527 // class and return the appropriate register.
8528 if (Res.second == X86::GR16RegisterClass) {
8529 if (VT == MVT::i8) {
8530 unsigned DestReg = 0;
8531 switch (Res.first) {
8533 case X86::AX: DestReg = X86::AL; break;
8534 case X86::DX: DestReg = X86::DL; break;
8535 case X86::CX: DestReg = X86::CL; break;
8536 case X86::BX: DestReg = X86::BL; break;
8539 Res.first = DestReg;
8540 Res.second = Res.second = X86::GR8RegisterClass;
8542 } else if (VT == MVT::i32) {
8543 unsigned DestReg = 0;
8544 switch (Res.first) {
8546 case X86::AX: DestReg = X86::EAX; break;
8547 case X86::DX: DestReg = X86::EDX; break;
8548 case X86::CX: DestReg = X86::ECX; break;
8549 case X86::BX: DestReg = X86::EBX; break;
8550 case X86::SI: DestReg = X86::ESI; break;
8551 case X86::DI: DestReg = X86::EDI; break;
8552 case X86::BP: DestReg = X86::EBP; break;
8553 case X86::SP: DestReg = X86::ESP; break;
8556 Res.first = DestReg;
8557 Res.second = Res.second = X86::GR32RegisterClass;
8559 } else if (VT == MVT::i64) {
8560 unsigned DestReg = 0;
8561 switch (Res.first) {
8563 case X86::AX: DestReg = X86::RAX; break;
8564 case X86::DX: DestReg = X86::RDX; break;
8565 case X86::CX: DestReg = X86::RCX; break;
8566 case X86::BX: DestReg = X86::RBX; break;
8567 case X86::SI: DestReg = X86::RSI; break;
8568 case X86::DI: DestReg = X86::RDI; break;
8569 case X86::BP: DestReg = X86::RBP; break;
8570 case X86::SP: DestReg = X86::RSP; break;
8573 Res.first = DestReg;
8574 Res.second = Res.second = X86::GR64RegisterClass;
8577 } else if (Res.second == X86::FR32RegisterClass ||
8578 Res.second == X86::FR64RegisterClass ||
8579 Res.second == X86::VR128RegisterClass) {
8580 // Handle references to XMM physical registers that got mapped into the
8581 // wrong class. This can happen with constraints like {xmm0} where the
8582 // target independent register mapper will just pick the first match it can
8583 // find, ignoring the required type.
8585 Res.second = X86::FR32RegisterClass;
8586 else if (VT == MVT::f64)
8587 Res.second = X86::FR64RegisterClass;
8588 else if (X86::VR128RegisterClass->hasType(VT))
8589 Res.second = X86::VR128RegisterClass;
8595 //===----------------------------------------------------------------------===//
8596 // X86 Widen vector type
8597 //===----------------------------------------------------------------------===//
8599 /// getWidenVectorType: given a vector type, returns the type to widen
8600 /// to (e.g., v7i8 to v8i8). If the vector type is legal, it returns itself.
8601 /// If there is no vector type that we want to widen to, returns MVT::Other
8602 /// When and where to widen is target dependent based on the cost of
8603 /// scalarizing vs using the wider vector type.
8605 MVT X86TargetLowering::getWidenVectorType(MVT VT) const {
8606 assert(VT.isVector());
8607 if (isTypeLegal(VT))
8610 // TODO: In computeRegisterProperty, we can compute the list of legal vector
8611 // type based on element type. This would speed up our search (though
8612 // it may not be worth it since the size of the list is relatively
8614 MVT EltVT = VT.getVectorElementType();
8615 unsigned NElts = VT.getVectorNumElements();
8617 // On X86, it make sense to widen any vector wider than 1
8621 for (unsigned nVT = MVT::FIRST_VECTOR_VALUETYPE;
8622 nVT <= MVT::LAST_VECTOR_VALUETYPE; ++nVT) {
8623 MVT SVT = (MVT::SimpleValueType)nVT;
8625 if (isTypeLegal(SVT) &&
8626 SVT.getVectorElementType() == EltVT &&
8627 SVT.getVectorNumElements() > NElts)