1 //===-- X86RegisterInfo.cpp - X86 Register Information --------------------===//
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 contains the X86 implementation of the TargetRegisterInfo class.
11 // This file is responsible for the frame pointer elimination optimization
14 //===----------------------------------------------------------------------===//
16 #include "X86RegisterInfo.h"
17 #include "X86InstrBuilder.h"
18 #include "X86MachineFunctionInfo.h"
19 #include "X86Subtarget.h"
20 #include "X86TargetMachine.h"
21 #include "llvm/ADT/BitVector.h"
22 #include "llvm/ADT/STLExtras.h"
23 #include "llvm/CodeGen/MachineFrameInfo.h"
24 #include "llvm/CodeGen/MachineFunction.h"
25 #include "llvm/CodeGen/MachineFunctionPass.h"
26 #include "llvm/CodeGen/MachineInstrBuilder.h"
27 #include "llvm/CodeGen/MachineModuleInfo.h"
28 #include "llvm/CodeGen/MachineRegisterInfo.h"
29 #include "llvm/CodeGen/MachineValueType.h"
30 #include "llvm/IR/Constants.h"
31 #include "llvm/IR/Function.h"
32 #include "llvm/IR/Type.h"
33 #include "llvm/MC/MCAsmInfo.h"
34 #include "llvm/Support/CommandLine.h"
35 #include "llvm/Support/ErrorHandling.h"
36 #include "llvm/Target/TargetFrameLowering.h"
37 #include "llvm/Target/TargetInstrInfo.h"
38 #include "llvm/Target/TargetMachine.h"
39 #include "llvm/Target/TargetOptions.h"
43 #define GET_REGINFO_TARGET_DESC
44 #include "X86GenRegisterInfo.inc"
47 ForceStackAlign("force-align-stack",
48 cl::desc("Force align the stack to the minimum alignment"
49 " needed for the function."),
50 cl::init(false), cl::Hidden);
53 EnableBasePointer("x86-use-base-pointer", cl::Hidden, cl::init(true),
54 cl::desc("Enable use of a base pointer for complex stack frames"));
56 X86RegisterInfo::X86RegisterInfo(const X86Subtarget &STI)
58 (STI.is64Bit() ? X86::RIP : X86::EIP),
59 X86_MC::getDwarfRegFlavour(STI.getTargetTriple(), false),
60 X86_MC::getDwarfRegFlavour(STI.getTargetTriple(), true),
61 (STI.is64Bit() ? X86::RIP : X86::EIP)),
63 X86_MC::InitLLVM2SEHRegisterMapping(this);
65 // Cache some information.
66 Is64Bit = Subtarget.is64Bit();
67 IsWin64 = Subtarget.isTargetWin64();
69 // Use a callee-saved register as the base pointer. These registers must
70 // not conflict with any ABI requirements. For example, in 32-bit mode PIC
71 // requires GOT in the EBX register before function calls via PLT GOT pointer.
75 Subtarget.isTarget64BitLP64() || Subtarget.isTargetNaCl64();
76 StackPtr = Use64BitReg ? X86::RSP : X86::ESP;
77 FramePtr = Use64BitReg ? X86::RBP : X86::EBP;
78 BasePtr = Use64BitReg ? X86::RBX : X86::EBX;
88 X86RegisterInfo::trackLivenessAfterRegAlloc(const MachineFunction &MF) const {
89 // ExeDepsFixer and PostRAScheduler require liveness.
94 X86RegisterInfo::getSEHRegNum(unsigned i) const {
95 return getEncodingValue(i);
98 const TargetRegisterClass *
99 X86RegisterInfo::getSubClassWithSubReg(const TargetRegisterClass *RC,
100 unsigned Idx) const {
101 // The sub_8bit sub-register index is more constrained in 32-bit mode.
102 // It behaves just like the sub_8bit_hi index.
103 if (!Is64Bit && Idx == X86::sub_8bit)
104 Idx = X86::sub_8bit_hi;
106 // Forward to TableGen's default version.
107 return X86GenRegisterInfo::getSubClassWithSubReg(RC, Idx);
110 const TargetRegisterClass *
111 X86RegisterInfo::getMatchingSuperRegClass(const TargetRegisterClass *A,
112 const TargetRegisterClass *B,
113 unsigned SubIdx) const {
114 // The sub_8bit sub-register index is more constrained in 32-bit mode.
115 if (!Is64Bit && SubIdx == X86::sub_8bit) {
116 A = X86GenRegisterInfo::getSubClassWithSubReg(A, X86::sub_8bit_hi);
120 return X86GenRegisterInfo::getMatchingSuperRegClass(A, B, SubIdx);
123 const TargetRegisterClass *
124 X86RegisterInfo::getLargestLegalSuperClass(const TargetRegisterClass *RC,
125 const MachineFunction &MF) const {
126 // Don't allow super-classes of GR8_NOREX. This class is only used after
127 // extracting sub_8bit_hi sub-registers. The H sub-registers cannot be copied
128 // to the full GR8 register class in 64-bit mode, so we cannot allow the
129 // reigster class inflation.
131 // The GR8_NOREX class is always used in a way that won't be constrained to a
132 // sub-class, so sub-classes like GR8_ABCD_L are allowed to expand to the
134 if (RC == &X86::GR8_NOREXRegClass)
137 const TargetRegisterClass *Super = RC;
138 TargetRegisterClass::sc_iterator I = RC->getSuperClasses();
140 switch (Super->getID()) {
141 case X86::GR8RegClassID:
142 case X86::GR16RegClassID:
143 case X86::GR32RegClassID:
144 case X86::GR64RegClassID:
145 case X86::FR32RegClassID:
146 case X86::FR64RegClassID:
147 case X86::RFP32RegClassID:
148 case X86::RFP64RegClassID:
149 case X86::RFP80RegClassID:
150 case X86::VR128RegClassID:
151 case X86::VR256RegClassID:
152 // Don't return a super-class that would shrink the spill size.
153 // That can happen with the vector and float classes.
154 if (Super->getSize() == RC->getSize())
162 const TargetRegisterClass *
163 X86RegisterInfo::getPointerRegClass(const MachineFunction &MF,
164 unsigned Kind) const {
166 default: llvm_unreachable("Unexpected Kind in getPointerRegClass!");
167 case 0: // Normal GPRs.
168 if (Subtarget.isTarget64BitLP64())
169 return &X86::GR64RegClass;
170 return &X86::GR32RegClass;
171 case 1: // Normal GPRs except the stack pointer (for encoding reasons).
172 if (Subtarget.isTarget64BitLP64())
173 return &X86::GR64_NOSPRegClass;
174 return &X86::GR32_NOSPRegClass;
175 case 2: // Available for tailcall (not callee-saved GPRs).
176 if (Subtarget.isTargetWin64())
177 return &X86::GR64_TCW64RegClass;
178 else if (Subtarget.is64Bit())
179 return &X86::GR64_TCRegClass;
181 const Function *F = MF.getFunction();
182 bool hasHipeCC = (F ? F->getCallingConv() == CallingConv::HiPE : false);
184 return &X86::GR32RegClass;
185 return &X86::GR32_TCRegClass;
189 const TargetRegisterClass *
190 X86RegisterInfo::getCrossCopyRegClass(const TargetRegisterClass *RC) const {
191 if (RC == &X86::CCRRegClass) {
193 return &X86::GR64RegClass;
195 return &X86::GR32RegClass;
201 X86RegisterInfo::getRegPressureLimit(const TargetRegisterClass *RC,
202 MachineFunction &MF) const {
203 const TargetFrameLowering *TFI = MF.getSubtarget().getFrameLowering();
205 unsigned FPDiff = TFI->hasFP(MF) ? 1 : 0;
206 switch (RC->getID()) {
209 case X86::GR32RegClassID:
211 case X86::GR64RegClassID:
213 case X86::VR128RegClassID:
214 return Subtarget.is64Bit() ? 10 : 4;
215 case X86::VR64RegClassID:
221 X86RegisterInfo::getCalleeSavedRegs(const MachineFunction *MF) const {
222 bool HasAVX = Subtarget.hasAVX();
223 bool HasAVX512 = Subtarget.hasAVX512();
224 bool CallsEHReturn = MF->getMMI().callsEHReturn();
226 assert(MF && "MachineFunction required");
227 switch (MF->getFunction()->getCallingConv()) {
228 case CallingConv::GHC:
229 case CallingConv::HiPE:
230 return CSR_NoRegs_SaveList;
231 case CallingConv::AnyReg:
233 return CSR_64_AllRegs_AVX_SaveList;
234 return CSR_64_AllRegs_SaveList;
235 case CallingConv::PreserveMost:
236 return CSR_64_RT_MostRegs_SaveList;
237 case CallingConv::PreserveAll:
239 return CSR_64_RT_AllRegs_AVX_SaveList;
240 return CSR_64_RT_AllRegs_SaveList;
241 case CallingConv::Intel_OCL_BI: {
242 if (HasAVX512 && IsWin64)
243 return CSR_Win64_Intel_OCL_BI_AVX512_SaveList;
244 if (HasAVX512 && Is64Bit)
245 return CSR_64_Intel_OCL_BI_AVX512_SaveList;
246 if (HasAVX && IsWin64)
247 return CSR_Win64_Intel_OCL_BI_AVX_SaveList;
248 if (HasAVX && Is64Bit)
249 return CSR_64_Intel_OCL_BI_AVX_SaveList;
250 if (!HasAVX && !IsWin64 && Is64Bit)
251 return CSR_64_Intel_OCL_BI_SaveList;
254 case CallingConv::Cold:
256 return CSR_64_MostRegs_SaveList;
258 case CallingConv::X86_64_Win64:
259 return CSR_Win64_SaveList;
260 case CallingConv::X86_64_SysV:
262 return CSR_64EHRet_SaveList;
263 return CSR_64_SaveList;
270 return CSR_Win64_SaveList;
272 return CSR_64EHRet_SaveList;
273 return CSR_64_SaveList;
276 return CSR_32EHRet_SaveList;
277 return CSR_32_SaveList;
281 X86RegisterInfo::getCallPreservedMask(CallingConv::ID CC) const {
282 bool HasAVX = Subtarget.hasAVX();
283 bool HasAVX512 = Subtarget.hasAVX512();
286 case CallingConv::GHC:
287 case CallingConv::HiPE:
288 return CSR_NoRegs_RegMask;
289 case CallingConv::AnyReg:
291 return CSR_64_AllRegs_AVX_RegMask;
292 return CSR_64_AllRegs_RegMask;
293 case CallingConv::PreserveMost:
294 return CSR_64_RT_MostRegs_RegMask;
295 case CallingConv::PreserveAll:
297 return CSR_64_RT_AllRegs_AVX_RegMask;
298 return CSR_64_RT_AllRegs_RegMask;
299 case CallingConv::Intel_OCL_BI: {
300 if (HasAVX512 && IsWin64)
301 return CSR_Win64_Intel_OCL_BI_AVX512_RegMask;
302 if (HasAVX512 && Is64Bit)
303 return CSR_64_Intel_OCL_BI_AVX512_RegMask;
304 if (HasAVX && IsWin64)
305 return CSR_Win64_Intel_OCL_BI_AVX_RegMask;
306 if (HasAVX && Is64Bit)
307 return CSR_64_Intel_OCL_BI_AVX_RegMask;
308 if (!HasAVX && !IsWin64 && Is64Bit)
309 return CSR_64_Intel_OCL_BI_RegMask;
312 case CallingConv::Cold:
314 return CSR_64_MostRegs_RegMask;
318 case CallingConv::X86_64_Win64:
319 return CSR_Win64_RegMask;
320 case CallingConv::X86_64_SysV:
321 return CSR_64_RegMask;
324 // Unlike getCalleeSavedRegs(), we don't have MMI so we can't check
328 return CSR_Win64_RegMask;
329 return CSR_64_RegMask;
331 return CSR_32_RegMask;
335 X86RegisterInfo::getNoPreservedMask() const {
336 return CSR_NoRegs_RegMask;
339 BitVector X86RegisterInfo::getReservedRegs(const MachineFunction &MF) const {
340 BitVector Reserved(getNumRegs());
341 const TargetFrameLowering *TFI = MF.getSubtarget().getFrameLowering();
343 // Set the stack-pointer register and its aliases as reserved.
344 for (MCSubRegIterator I(X86::RSP, this, /*IncludeSelf=*/true); I.isValid();
348 // Set the instruction pointer register and its aliases as reserved.
349 for (MCSubRegIterator I(X86::RIP, this, /*IncludeSelf=*/true); I.isValid();
353 // Set the frame-pointer register and its aliases as reserved if needed.
354 if (TFI->hasFP(MF)) {
355 for (MCSubRegIterator I(X86::RBP, this, /*IncludeSelf=*/true); I.isValid();
360 // Set the base-pointer register and its aliases as reserved if needed.
361 if (hasBasePointer(MF)) {
362 CallingConv::ID CC = MF.getFunction()->getCallingConv();
363 const uint32_t* RegMask = getCallPreservedMask(CC);
364 if (MachineOperand::clobbersPhysReg(RegMask, getBaseRegister()))
366 "Stack realignment in presence of dynamic allocas is not supported with"
367 "this calling convention.");
369 unsigned BasePtr = getX86SubSuperRegister(getBaseRegister(), MVT::i64,
371 for (MCSubRegIterator I(BasePtr, this, /*IncludeSelf=*/true);
376 // Mark the segment registers as reserved.
377 Reserved.set(X86::CS);
378 Reserved.set(X86::SS);
379 Reserved.set(X86::DS);
380 Reserved.set(X86::ES);
381 Reserved.set(X86::FS);
382 Reserved.set(X86::GS);
384 // Mark the floating point stack registers as reserved.
385 for (unsigned n = 0; n != 8; ++n)
386 Reserved.set(X86::ST0 + n);
388 // Reserve the registers that only exist in 64-bit mode.
390 // These 8-bit registers are part of the x86-64 extension even though their
391 // super-registers are old 32-bits.
392 Reserved.set(X86::SIL);
393 Reserved.set(X86::DIL);
394 Reserved.set(X86::BPL);
395 Reserved.set(X86::SPL);
397 for (unsigned n = 0; n != 8; ++n) {
399 for (MCRegAliasIterator AI(X86::R8 + n, this, true); AI.isValid(); ++AI)
403 for (MCRegAliasIterator AI(X86::XMM8 + n, this, true); AI.isValid(); ++AI)
407 if (!Is64Bit || !Subtarget.hasAVX512()) {
408 for (unsigned n = 16; n != 32; ++n) {
409 for (MCRegAliasIterator AI(X86::XMM0 + n, this, true); AI.isValid(); ++AI)
417 //===----------------------------------------------------------------------===//
418 // Stack Frame Processing methods
419 //===----------------------------------------------------------------------===//
421 bool X86RegisterInfo::hasBasePointer(const MachineFunction &MF) const {
422 const MachineFrameInfo *MFI = MF.getFrameInfo();
424 if (!EnableBasePointer)
427 // When we need stack realignment, we can't address the stack from the frame
428 // pointer. When we have dynamic allocas or stack-adjusting inline asm, we
429 // can't address variables from the stack pointer. MS inline asm can
430 // reference locals while also adjusting the stack pointer. When we can't
431 // use both the SP and the FP, we need a separate base pointer register.
432 bool CantUseFP = needsStackRealignment(MF);
434 MFI->hasVarSizedObjects() || MFI->hasInlineAsmWithSPAdjust();
435 return CantUseFP && CantUseSP;
438 bool X86RegisterInfo::canRealignStack(const MachineFunction &MF) const {
439 if (MF.getFunction()->hasFnAttribute("no-realign-stack"))
442 const MachineFrameInfo *MFI = MF.getFrameInfo();
443 const MachineRegisterInfo *MRI = &MF.getRegInfo();
445 // Stack realignment requires a frame pointer. If we already started
446 // register allocation with frame pointer elimination, it is too late now.
447 if (!MRI->canReserveReg(FramePtr))
450 // If a base pointer is necessary. Check that it isn't too late to reserve
452 if (MFI->hasVarSizedObjects())
453 return MRI->canReserveReg(BasePtr);
457 bool X86RegisterInfo::needsStackRealignment(const MachineFunction &MF) const {
458 const MachineFrameInfo *MFI = MF.getFrameInfo();
459 const Function *F = MF.getFunction();
460 unsigned StackAlign =
461 MF.getSubtarget().getFrameLowering()->getStackAlignment();
462 bool requiresRealignment = ((MFI->getMaxAlignment() > StackAlign) ||
463 F->hasFnAttribute(Attribute::StackAlignment));
465 // If we've requested that we force align the stack do so now.
467 return canRealignStack(MF);
469 return requiresRealignment && canRealignStack(MF);
472 bool X86RegisterInfo::hasReservedSpillSlot(const MachineFunction &MF,
473 unsigned Reg, int &FrameIdx) const {
474 // Since X86 defines assignCalleeSavedSpillSlots which always return true
475 // this function neither used nor tested.
476 llvm_unreachable("Unused function on X86. Otherwise need a test case.");
480 X86RegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II,
481 int SPAdj, unsigned FIOperandNum,
482 RegScavenger *RS) const {
483 MachineInstr &MI = *II;
484 MachineFunction &MF = *MI.getParent()->getParent();
485 const TargetFrameLowering *TFI = MF.getSubtarget().getFrameLowering();
486 int FrameIndex = MI.getOperand(FIOperandNum).getIndex();
489 unsigned Opc = MI.getOpcode();
490 bool AfterFPPop = Opc == X86::TAILJMPm64 || Opc == X86::TAILJMPm;
491 if (hasBasePointer(MF))
492 BasePtr = (FrameIndex < 0 ? FramePtr : getBaseRegister());
493 else if (needsStackRealignment(MF))
494 BasePtr = (FrameIndex < 0 ? FramePtr : StackPtr);
498 BasePtr = (TFI->hasFP(MF) ? FramePtr : StackPtr);
500 // FRAME_ALLOC uses a single offset, with no register. It only works in the
501 // simple FP case, and doesn't work with stack realignment. On 32-bit, the
502 // offset is from the traditional base pointer location. On 64-bit, the
503 // offset is from the SP at the end of the prologue, not the FP location. This
504 // matches the behavior of llvm.frameaddress.
505 if (Opc == TargetOpcode::FRAME_ALLOC) {
506 assert(TFI->hasFP(MF) && "frame alloc requires FP");
507 MachineOperand &FI = MI.getOperand(FIOperandNum);
508 const MachineFrameInfo *MFI = MF.getFrameInfo();
509 int Offset = MFI->getObjectOffset(FrameIndex) - TFI->getOffsetOfLocalArea();
510 bool IsWinEH = MF.getTarget().getMCAsmInfo()->usesWindowsCFI();
512 Offset += MFI->getStackSize();
515 FI.ChangeToImmediate(Offset);
519 // For LEA64_32r when BasePtr is 32-bits (X32) we can use full-size 64-bit
520 // register as source operand, semantic is the same and destination is
521 // 32-bits. It saves one byte per lea in code since 0x67 prefix is avoided.
522 if (Opc == X86::LEA64_32r && X86::GR32RegClass.contains(BasePtr))
523 BasePtr = getX86SubSuperRegister(BasePtr, MVT::i64, false);
525 // This must be part of a four operand memory reference. Replace the
526 // FrameIndex with base register with EBP. Add an offset to the offset.
527 MI.getOperand(FIOperandNum).ChangeToRegister(BasePtr, false);
529 // Now add the frame object offset to the offset from EBP.
532 // Tail call jmp happens after FP is popped.
533 const MachineFrameInfo *MFI = MF.getFrameInfo();
534 FIOffset = MFI->getObjectOffset(FrameIndex) - TFI->getOffsetOfLocalArea();
536 FIOffset = TFI->getFrameIndexOffset(MF, FrameIndex);
538 if (BasePtr == StackPtr)
541 // The frame index format for stackmaps and patchpoints is different from the
542 // X86 format. It only has a FI and an offset.
543 if (Opc == TargetOpcode::STACKMAP || Opc == TargetOpcode::PATCHPOINT) {
544 assert(BasePtr == FramePtr && "Expected the FP as base register");
545 int64_t Offset = MI.getOperand(FIOperandNum + 1).getImm() + FIOffset;
546 MI.getOperand(FIOperandNum + 1).ChangeToImmediate(Offset);
550 if (MI.getOperand(FIOperandNum+3).isImm()) {
551 // Offset is a 32-bit integer.
552 int Imm = (int)(MI.getOperand(FIOperandNum + 3).getImm());
553 int Offset = FIOffset + Imm;
554 assert((!Is64Bit || isInt<32>((long long)FIOffset + Imm)) &&
555 "Requesting 64-bit offset in 32-bit immediate!");
556 MI.getOperand(FIOperandNum + 3).ChangeToImmediate(Offset);
558 // Offset is symbolic. This is extremely rare.
559 uint64_t Offset = FIOffset +
560 (uint64_t)MI.getOperand(FIOperandNum+3).getOffset();
561 MI.getOperand(FIOperandNum + 3).setOffset(Offset);
565 unsigned X86RegisterInfo::getFrameRegister(const MachineFunction &MF) const {
566 const TargetFrameLowering *TFI = MF.getSubtarget().getFrameLowering();
567 return TFI->hasFP(MF) ? FramePtr : StackPtr;
570 unsigned X86RegisterInfo::getPtrSizedFrameRegister(
571 const MachineFunction &MF) const {
572 unsigned FrameReg = getFrameRegister(MF);
573 if (Subtarget.isTarget64BitILP32())
574 FrameReg = getX86SubSuperRegister(FrameReg, MVT::i32, false);
579 unsigned getX86SubSuperRegister(unsigned Reg, MVT::SimpleValueType VT,
582 default: llvm_unreachable("Unexpected VT");
586 default: return getX86SubSuperRegister(Reg, MVT::i64);
587 case X86::SIL: case X86::SI: case X86::ESI: case X86::RSI:
589 case X86::DIL: case X86::DI: case X86::EDI: case X86::RDI:
591 case X86::BPL: case X86::BP: case X86::EBP: case X86::RBP:
593 case X86::SPL: case X86::SP: case X86::ESP: case X86::RSP:
595 case X86::AH: case X86::AL: case X86::AX: case X86::EAX: case X86::RAX:
597 case X86::DH: case X86::DL: case X86::DX: case X86::EDX: case X86::RDX:
599 case X86::CH: case X86::CL: case X86::CX: case X86::ECX: case X86::RCX:
601 case X86::BH: case X86::BL: case X86::BX: case X86::EBX: case X86::RBX:
606 default: llvm_unreachable("Unexpected register");
607 case X86::AH: case X86::AL: case X86::AX: case X86::EAX: case X86::RAX:
609 case X86::DH: case X86::DL: case X86::DX: case X86::EDX: case X86::RDX:
611 case X86::CH: case X86::CL: case X86::CX: case X86::ECX: case X86::RCX:
613 case X86::BH: case X86::BL: case X86::BX: case X86::EBX: case X86::RBX:
615 case X86::SIL: case X86::SI: case X86::ESI: case X86::RSI:
617 case X86::DIL: case X86::DI: case X86::EDI: case X86::RDI:
619 case X86::BPL: case X86::BP: case X86::EBP: case X86::RBP:
621 case X86::SPL: case X86::SP: case X86::ESP: case X86::RSP:
623 case X86::R8B: case X86::R8W: case X86::R8D: case X86::R8:
625 case X86::R9B: case X86::R9W: case X86::R9D: case X86::R9:
627 case X86::R10B: case X86::R10W: case X86::R10D: case X86::R10:
629 case X86::R11B: case X86::R11W: case X86::R11D: case X86::R11:
631 case X86::R12B: case X86::R12W: case X86::R12D: case X86::R12:
633 case X86::R13B: case X86::R13W: case X86::R13D: case X86::R13:
635 case X86::R14B: case X86::R14W: case X86::R14D: case X86::R14:
637 case X86::R15B: case X86::R15W: case X86::R15D: case X86::R15:
643 default: llvm_unreachable("Unexpected register");
644 case X86::AH: case X86::AL: case X86::AX: case X86::EAX: case X86::RAX:
646 case X86::DH: case X86::DL: case X86::DX: case X86::EDX: case X86::RDX:
648 case X86::CH: case X86::CL: case X86::CX: case X86::ECX: case X86::RCX:
650 case X86::BH: case X86::BL: case X86::BX: case X86::EBX: case X86::RBX:
652 case X86::SIL: case X86::SI: case X86::ESI: case X86::RSI:
654 case X86::DIL: case X86::DI: case X86::EDI: case X86::RDI:
656 case X86::BPL: case X86::BP: case X86::EBP: case X86::RBP:
658 case X86::SPL: case X86::SP: case X86::ESP: case X86::RSP:
660 case X86::R8B: case X86::R8W: case X86::R8D: case X86::R8:
662 case X86::R9B: case X86::R9W: case X86::R9D: case X86::R9:
664 case X86::R10B: case X86::R10W: case X86::R10D: case X86::R10:
666 case X86::R11B: case X86::R11W: case X86::R11D: case X86::R11:
668 case X86::R12B: case X86::R12W: case X86::R12D: case X86::R12:
670 case X86::R13B: case X86::R13W: case X86::R13D: case X86::R13:
672 case X86::R14B: case X86::R14W: case X86::R14D: case X86::R14:
674 case X86::R15B: case X86::R15W: case X86::R15D: case X86::R15:
679 default: llvm_unreachable("Unexpected register");
680 case X86::AH: case X86::AL: case X86::AX: case X86::EAX: case X86::RAX:
682 case X86::DH: case X86::DL: case X86::DX: case X86::EDX: case X86::RDX:
684 case X86::CH: case X86::CL: case X86::CX: case X86::ECX: case X86::RCX:
686 case X86::BH: case X86::BL: case X86::BX: case X86::EBX: case X86::RBX:
688 case X86::SIL: case X86::SI: case X86::ESI: case X86::RSI:
690 case X86::DIL: case X86::DI: case X86::EDI: case X86::RDI:
692 case X86::BPL: case X86::BP: case X86::EBP: case X86::RBP:
694 case X86::SPL: case X86::SP: case X86::ESP: case X86::RSP:
696 case X86::R8B: case X86::R8W: case X86::R8D: case X86::R8:
698 case X86::R9B: case X86::R9W: case X86::R9D: case X86::R9:
700 case X86::R10B: case X86::R10W: case X86::R10D: case X86::R10:
702 case X86::R11B: case X86::R11W: case X86::R11D: case X86::R11:
704 case X86::R12B: case X86::R12W: case X86::R12D: case X86::R12:
706 case X86::R13B: case X86::R13W: case X86::R13D: case X86::R13:
708 case X86::R14B: case X86::R14W: case X86::R14D: case X86::R14:
710 case X86::R15B: case X86::R15W: case X86::R15D: case X86::R15:
715 default: llvm_unreachable("Unexpected register");
716 case X86::AH: case X86::AL: case X86::AX: case X86::EAX: case X86::RAX:
718 case X86::DH: case X86::DL: case X86::DX: case X86::EDX: case X86::RDX:
720 case X86::CH: case X86::CL: case X86::CX: case X86::ECX: case X86::RCX:
722 case X86::BH: case X86::BL: case X86::BX: case X86::EBX: case X86::RBX:
724 case X86::SIL: case X86::SI: case X86::ESI: case X86::RSI:
726 case X86::DIL: case X86::DI: case X86::EDI: case X86::RDI:
728 case X86::BPL: case X86::BP: case X86::EBP: case X86::RBP:
730 case X86::SPL: case X86::SP: case X86::ESP: case X86::RSP:
732 case X86::R8B: case X86::R8W: case X86::R8D: case X86::R8:
734 case X86::R9B: case X86::R9W: case X86::R9D: case X86::R9:
736 case X86::R10B: case X86::R10W: case X86::R10D: case X86::R10:
738 case X86::R11B: case X86::R11W: case X86::R11D: case X86::R11:
740 case X86::R12B: case X86::R12W: case X86::R12D: case X86::R12:
742 case X86::R13B: case X86::R13W: case X86::R13D: case X86::R13:
744 case X86::R14B: case X86::R14W: case X86::R14D: case X86::R14:
746 case X86::R15B: case X86::R15W: case X86::R15D: case X86::R15:
752 unsigned get512BitSuperRegister(unsigned Reg) {
753 if (Reg >= X86::XMM0 && Reg <= X86::XMM31)
754 return X86::ZMM0 + (Reg - X86::XMM0);
755 if (Reg >= X86::YMM0 && Reg <= X86::YMM31)
756 return X86::ZMM0 + (Reg - X86::YMM0);
757 if (Reg >= X86::ZMM0 && Reg <= X86::ZMM31)
759 llvm_unreachable("Unexpected SIMD register");