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 "X86FrameLowering.h"
18 #include "X86InstrBuilder.h"
19 #include "X86MachineFunctionInfo.h"
20 #include "X86Subtarget.h"
21 #include "X86TargetMachine.h"
22 #include "llvm/ADT/BitVector.h"
23 #include "llvm/ADT/STLExtras.h"
24 #include "llvm/CodeGen/MachineFrameInfo.h"
25 #include "llvm/CodeGen/MachineFunction.h"
26 #include "llvm/CodeGen/MachineFunctionPass.h"
27 #include "llvm/CodeGen/MachineInstrBuilder.h"
28 #include "llvm/CodeGen/MachineModuleInfo.h"
29 #include "llvm/CodeGen/MachineRegisterInfo.h"
30 #include "llvm/CodeGen/MachineValueType.h"
31 #include "llvm/IR/Constants.h"
32 #include "llvm/IR/Function.h"
33 #include "llvm/IR/Type.h"
34 #include "llvm/MC/MCAsmInfo.h"
35 #include "llvm/Support/CommandLine.h"
36 #include "llvm/Support/ErrorHandling.h"
37 #include "llvm/Target/TargetFrameLowering.h"
38 #include "llvm/Target/TargetInstrInfo.h"
39 #include "llvm/Target/TargetMachine.h"
40 #include "llvm/Target/TargetOptions.h"
44 #define GET_REGINFO_TARGET_DESC
45 #include "X86GenRegisterInfo.inc"
48 ForceStackAlign("force-align-stack",
49 cl::desc("Force align the stack to the minimum alignment"
50 " needed for the function."),
51 cl::init(false), cl::Hidden);
54 EnableBasePointer("x86-use-base-pointer", cl::Hidden, cl::init(true),
55 cl::desc("Enable use of a base pointer for complex stack frames"));
57 X86RegisterInfo::X86RegisterInfo(const Triple &TT)
58 : X86GenRegisterInfo((TT.isArch64Bit() ? X86::RIP : X86::EIP),
59 X86_MC::getDwarfRegFlavour(TT, false),
60 X86_MC::getDwarfRegFlavour(TT, true),
61 (TT.isArch64Bit() ? X86::RIP : X86::EIP)) {
62 X86_MC::InitLLVM2SEHRegisterMapping(this);
64 // Cache some information.
65 Is64Bit = TT.isArch64Bit();
66 IsWin64 = Is64Bit && TT.isOSWindows();
68 // Use a callee-saved register as the base pointer. These registers must
69 // not conflict with any ABI requirements. For example, in 32-bit mode PIC
70 // requires GOT in the EBX register before function calls via PLT GOT pointer.
73 // This matches the simplified 32-bit pointer code in the data layout
75 // FIXME: Should use the data layout?
76 bool Use64BitReg = TT.getEnvironment() != Triple::GNUX32;
77 StackPtr = Use64BitReg ? X86::RSP : X86::ESP;
78 FramePtr = Use64BitReg ? X86::RBP : X86::EBP;
79 BasePtr = Use64BitReg ? X86::RBX : X86::EBX;
89 X86RegisterInfo::trackLivenessAfterRegAlloc(const MachineFunction &MF) const {
90 // ExeDepsFixer and PostRAScheduler require liveness.
95 X86RegisterInfo::getSEHRegNum(unsigned i) const {
96 return getEncodingValue(i);
99 const TargetRegisterClass *
100 X86RegisterInfo::getSubClassWithSubReg(const TargetRegisterClass *RC,
101 unsigned Idx) const {
102 // The sub_8bit sub-register index is more constrained in 32-bit mode.
103 // It behaves just like the sub_8bit_hi index.
104 if (!Is64Bit && Idx == X86::sub_8bit)
105 Idx = X86::sub_8bit_hi;
107 // Forward to TableGen's default version.
108 return X86GenRegisterInfo::getSubClassWithSubReg(RC, Idx);
111 const TargetRegisterClass *
112 X86RegisterInfo::getMatchingSuperRegClass(const TargetRegisterClass *A,
113 const TargetRegisterClass *B,
114 unsigned SubIdx) const {
115 // The sub_8bit sub-register index is more constrained in 32-bit mode.
116 if (!Is64Bit && SubIdx == X86::sub_8bit) {
117 A = X86GenRegisterInfo::getSubClassWithSubReg(A, X86::sub_8bit_hi);
121 return X86GenRegisterInfo::getMatchingSuperRegClass(A, B, SubIdx);
124 const TargetRegisterClass *
125 X86RegisterInfo::getLargestLegalSuperClass(const TargetRegisterClass *RC,
126 const MachineFunction &MF) const {
127 // Don't allow super-classes of GR8_NOREX. This class is only used after
128 // extracting sub_8bit_hi sub-registers. The H sub-registers cannot be copied
129 // to the full GR8 register class in 64-bit mode, so we cannot allow the
130 // reigster class inflation.
132 // The GR8_NOREX class is always used in a way that won't be constrained to a
133 // sub-class, so sub-classes like GR8_ABCD_L are allowed to expand to the
135 if (RC == &X86::GR8_NOREXRegClass)
138 const TargetRegisterClass *Super = RC;
139 TargetRegisterClass::sc_iterator I = RC->getSuperClasses();
141 switch (Super->getID()) {
142 case X86::GR8RegClassID:
143 case X86::GR16RegClassID:
144 case X86::GR32RegClassID:
145 case X86::GR64RegClassID:
146 case X86::FR32RegClassID:
147 case X86::FR64RegClassID:
148 case X86::RFP32RegClassID:
149 case X86::RFP64RegClassID:
150 case X86::RFP80RegClassID:
151 case X86::VR128RegClassID:
152 case X86::VR256RegClassID:
153 // Don't return a super-class that would shrink the spill size.
154 // That can happen with the vector and float classes.
155 if (Super->getSize() == RC->getSize())
163 const TargetRegisterClass *
164 X86RegisterInfo::getPointerRegClass(const MachineFunction &MF,
165 unsigned Kind) const {
166 const X86Subtarget &Subtarget = MF.getSubtarget<X86Subtarget>();
168 default: llvm_unreachable("Unexpected Kind in getPointerRegClass!");
169 case 0: // Normal GPRs.
170 if (Subtarget.isTarget64BitLP64())
171 return &X86::GR64RegClass;
172 return &X86::GR32RegClass;
173 case 1: // Normal GPRs except the stack pointer (for encoding reasons).
174 if (Subtarget.isTarget64BitLP64())
175 return &X86::GR64_NOSPRegClass;
176 return &X86::GR32_NOSPRegClass;
177 case 2: // Available for tailcall (not callee-saved GPRs).
179 return &X86::GR64_TCW64RegClass;
181 return &X86::GR64_TCRegClass;
183 const Function *F = MF.getFunction();
184 bool hasHipeCC = (F ? F->getCallingConv() == CallingConv::HiPE : false);
186 return &X86::GR32RegClass;
187 return &X86::GR32_TCRegClass;
191 const TargetRegisterClass *
192 X86RegisterInfo::getCrossCopyRegClass(const TargetRegisterClass *RC) const {
193 if (RC == &X86::CCRRegClass) {
195 return &X86::GR64RegClass;
197 return &X86::GR32RegClass;
203 X86RegisterInfo::getRegPressureLimit(const TargetRegisterClass *RC,
204 MachineFunction &MF) const {
205 const TargetFrameLowering *TFI = MF.getSubtarget().getFrameLowering();
207 unsigned FPDiff = TFI->hasFP(MF) ? 1 : 0;
208 switch (RC->getID()) {
211 case X86::GR32RegClassID:
213 case X86::GR64RegClassID:
215 case X86::VR128RegClassID:
216 return Is64Bit ? 10 : 4;
217 case X86::VR64RegClassID:
223 X86RegisterInfo::getCalleeSavedRegs(const MachineFunction *MF) const {
224 const X86Subtarget &Subtarget = MF->getSubtarget<X86Subtarget>();
225 bool HasAVX = Subtarget.hasAVX();
226 bool HasAVX512 = Subtarget.hasAVX512();
227 bool CallsEHReturn = MF->getMMI().callsEHReturn();
229 assert(MF && "MachineFunction required");
230 switch (MF->getFunction()->getCallingConv()) {
231 case CallingConv::GHC:
232 case CallingConv::HiPE:
233 return CSR_NoRegs_SaveList;
234 case CallingConv::AnyReg:
236 return CSR_64_AllRegs_AVX_SaveList;
237 return CSR_64_AllRegs_SaveList;
238 case CallingConv::PreserveMost:
239 return CSR_64_RT_MostRegs_SaveList;
240 case CallingConv::PreserveAll:
242 return CSR_64_RT_AllRegs_AVX_SaveList;
243 return CSR_64_RT_AllRegs_SaveList;
244 case CallingConv::Intel_OCL_BI: {
245 if (HasAVX512 && IsWin64)
246 return CSR_Win64_Intel_OCL_BI_AVX512_SaveList;
247 if (HasAVX512 && Is64Bit)
248 return CSR_64_Intel_OCL_BI_AVX512_SaveList;
249 if (HasAVX && IsWin64)
250 return CSR_Win64_Intel_OCL_BI_AVX_SaveList;
251 if (HasAVX && Is64Bit)
252 return CSR_64_Intel_OCL_BI_AVX_SaveList;
253 if (!HasAVX && !IsWin64 && Is64Bit)
254 return CSR_64_Intel_OCL_BI_SaveList;
257 case CallingConv::Cold:
259 return CSR_64_MostRegs_SaveList;
261 case CallingConv::X86_64_Win64:
262 return CSR_Win64_SaveList;
263 case CallingConv::X86_64_SysV:
265 return CSR_64EHRet_SaveList;
266 return CSR_64_SaveList;
273 return CSR_Win64_SaveList;
275 return CSR_64EHRet_SaveList;
276 return CSR_64_SaveList;
279 return CSR_32EHRet_SaveList;
280 return CSR_32_SaveList;
284 X86RegisterInfo::getCallPreservedMask(const MachineFunction &MF,
285 CallingConv::ID CC) const {
286 const X86Subtarget &Subtarget = MF.getSubtarget<X86Subtarget>();
287 bool HasAVX = Subtarget.hasAVX();
288 bool HasAVX512 = Subtarget.hasAVX512();
291 case CallingConv::GHC:
292 case CallingConv::HiPE:
293 return CSR_NoRegs_RegMask;
294 case CallingConv::AnyReg:
296 return CSR_64_AllRegs_AVX_RegMask;
297 return CSR_64_AllRegs_RegMask;
298 case CallingConv::PreserveMost:
299 return CSR_64_RT_MostRegs_RegMask;
300 case CallingConv::PreserveAll:
302 return CSR_64_RT_AllRegs_AVX_RegMask;
303 return CSR_64_RT_AllRegs_RegMask;
304 case CallingConv::Intel_OCL_BI: {
305 if (HasAVX512 && IsWin64)
306 return CSR_Win64_Intel_OCL_BI_AVX512_RegMask;
307 if (HasAVX512 && Is64Bit)
308 return CSR_64_Intel_OCL_BI_AVX512_RegMask;
309 if (HasAVX && IsWin64)
310 return CSR_Win64_Intel_OCL_BI_AVX_RegMask;
311 if (HasAVX && Is64Bit)
312 return CSR_64_Intel_OCL_BI_AVX_RegMask;
313 if (!HasAVX && !IsWin64 && Is64Bit)
314 return CSR_64_Intel_OCL_BI_RegMask;
317 case CallingConv::Cold:
319 return CSR_64_MostRegs_RegMask;
323 case CallingConv::X86_64_Win64:
324 return CSR_Win64_RegMask;
325 case CallingConv::X86_64_SysV:
326 return CSR_64_RegMask;
329 // Unlike getCalleeSavedRegs(), we don't have MMI so we can't check
333 return CSR_Win64_RegMask;
334 return CSR_64_RegMask;
336 return CSR_32_RegMask;
340 X86RegisterInfo::getNoPreservedMask() const {
341 return CSR_NoRegs_RegMask;
344 BitVector X86RegisterInfo::getReservedRegs(const MachineFunction &MF) const {
345 BitVector Reserved(getNumRegs());
346 const TargetFrameLowering *TFI = MF.getSubtarget().getFrameLowering();
348 // Set the stack-pointer register and its aliases as reserved.
349 for (MCSubRegIterator I(X86::RSP, this, /*IncludeSelf=*/true); I.isValid();
353 // Set the instruction pointer register and its aliases as reserved.
354 for (MCSubRegIterator I(X86::RIP, this, /*IncludeSelf=*/true); I.isValid();
358 // Set the frame-pointer register and its aliases as reserved if needed.
359 if (TFI->hasFP(MF)) {
360 for (MCSubRegIterator I(X86::RBP, this, /*IncludeSelf=*/true); I.isValid();
365 // Set the base-pointer register and its aliases as reserved if needed.
366 if (hasBasePointer(MF)) {
367 CallingConv::ID CC = MF.getFunction()->getCallingConv();
368 const uint32_t *RegMask = getCallPreservedMask(MF, CC);
369 if (MachineOperand::clobbersPhysReg(RegMask, getBaseRegister()))
371 "Stack realignment in presence of dynamic allocas is not supported with"
372 "this calling convention.");
374 unsigned BasePtr = getX86SubSuperRegister(getBaseRegister(), MVT::i64,
376 for (MCSubRegIterator I(BasePtr, this, /*IncludeSelf=*/true);
381 // Mark the segment registers as reserved.
382 Reserved.set(X86::CS);
383 Reserved.set(X86::SS);
384 Reserved.set(X86::DS);
385 Reserved.set(X86::ES);
386 Reserved.set(X86::FS);
387 Reserved.set(X86::GS);
389 // Mark the floating point stack registers as reserved.
390 for (unsigned n = 0; n != 8; ++n)
391 Reserved.set(X86::ST0 + n);
393 // Reserve the registers that only exist in 64-bit mode.
395 // These 8-bit registers are part of the x86-64 extension even though their
396 // super-registers are old 32-bits.
397 Reserved.set(X86::SIL);
398 Reserved.set(X86::DIL);
399 Reserved.set(X86::BPL);
400 Reserved.set(X86::SPL);
402 for (unsigned n = 0; n != 8; ++n) {
404 for (MCRegAliasIterator AI(X86::R8 + n, this, true); AI.isValid(); ++AI)
408 for (MCRegAliasIterator AI(X86::XMM8 + n, this, true); AI.isValid(); ++AI)
412 if (!Is64Bit || !MF.getSubtarget<X86Subtarget>().hasAVX512()) {
413 for (unsigned n = 16; n != 32; ++n) {
414 for (MCRegAliasIterator AI(X86::XMM0 + n, this, true); AI.isValid(); ++AI)
422 //===----------------------------------------------------------------------===//
423 // Stack Frame Processing methods
424 //===----------------------------------------------------------------------===//
426 bool X86RegisterInfo::hasBasePointer(const MachineFunction &MF) const {
427 const MachineFrameInfo *MFI = MF.getFrameInfo();
429 if (!EnableBasePointer)
432 // When we need stack realignment, we can't address the stack from the frame
433 // pointer. When we have dynamic allocas or stack-adjusting inline asm, we
434 // can't address variables from the stack pointer. MS inline asm can
435 // reference locals while also adjusting the stack pointer. When we can't
436 // use both the SP and the FP, we need a separate base pointer register.
437 bool CantUseFP = needsStackRealignment(MF);
439 MFI->hasVarSizedObjects() || MFI->hasInlineAsmWithSPAdjust();
440 return CantUseFP && CantUseSP;
443 bool X86RegisterInfo::canRealignStack(const MachineFunction &MF) const {
444 if (MF.getFunction()->hasFnAttribute("no-realign-stack"))
447 const MachineFrameInfo *MFI = MF.getFrameInfo();
448 const MachineRegisterInfo *MRI = &MF.getRegInfo();
450 // Stack realignment requires a frame pointer. If we already started
451 // register allocation with frame pointer elimination, it is too late now.
452 if (!MRI->canReserveReg(FramePtr))
455 // If a base pointer is necessary. Check that it isn't too late to reserve
457 if (MFI->hasVarSizedObjects())
458 return MRI->canReserveReg(BasePtr);
462 bool X86RegisterInfo::needsStackRealignment(const MachineFunction &MF) const {
463 const MachineFrameInfo *MFI = MF.getFrameInfo();
464 const Function *F = MF.getFunction();
465 unsigned StackAlign =
466 MF.getSubtarget().getFrameLowering()->getStackAlignment();
467 bool requiresRealignment = ((MFI->getMaxAlignment() > StackAlign) ||
468 F->hasFnAttribute(Attribute::StackAlignment));
470 // If we've requested that we force align the stack do so now.
472 return canRealignStack(MF);
474 return requiresRealignment && canRealignStack(MF);
477 bool X86RegisterInfo::hasReservedSpillSlot(const MachineFunction &MF,
478 unsigned Reg, int &FrameIdx) const {
479 // Since X86 defines assignCalleeSavedSpillSlots which always return true
480 // this function neither used nor tested.
481 llvm_unreachable("Unused function on X86. Otherwise need a test case.");
485 X86RegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II,
486 int SPAdj, unsigned FIOperandNum,
487 RegScavenger *RS) const {
488 MachineInstr &MI = *II;
489 MachineFunction &MF = *MI.getParent()->getParent();
490 const TargetFrameLowering *TFI = MF.getSubtarget().getFrameLowering();
491 int FrameIndex = MI.getOperand(FIOperandNum).getIndex();
494 unsigned Opc = MI.getOpcode();
495 bool AfterFPPop = Opc == X86::TAILJMPm64 || Opc == X86::TAILJMPm;
496 if (hasBasePointer(MF))
497 BasePtr = (FrameIndex < 0 ? FramePtr : getBaseRegister());
498 else if (needsStackRealignment(MF))
499 BasePtr = (FrameIndex < 0 ? FramePtr : StackPtr);
503 BasePtr = (TFI->hasFP(MF) ? FramePtr : StackPtr);
505 // FRAME_ALLOC uses a single offset, with no register. It only works in the
506 // simple FP case, and doesn't work with stack realignment. On 32-bit, the
507 // offset is from the traditional base pointer location. On 64-bit, the
508 // offset is from the SP at the end of the prologue, not the FP location. This
509 // matches the behavior of llvm.frameaddress.
510 if (Opc == TargetOpcode::FRAME_ALLOC) {
511 MachineOperand &FI = MI.getOperand(FIOperandNum);
512 bool IsWinEH = MF.getTarget().getMCAsmInfo()->usesWindowsCFI();
515 Offset = static_cast<const X86FrameLowering *>(TFI)
516 ->getFrameIndexOffsetFromSP(MF, FrameIndex);
518 Offset = TFI->getFrameIndexOffset(MF, FrameIndex);
519 FI.ChangeToImmediate(Offset);
523 // For LEA64_32r when BasePtr is 32-bits (X32) we can use full-size 64-bit
524 // register as source operand, semantic is the same and destination is
525 // 32-bits. It saves one byte per lea in code since 0x67 prefix is avoided.
526 if (Opc == X86::LEA64_32r && X86::GR32RegClass.contains(BasePtr))
527 BasePtr = getX86SubSuperRegister(BasePtr, MVT::i64, false);
529 // This must be part of a four operand memory reference. Replace the
530 // FrameIndex with base register with EBP. Add an offset to the offset.
531 MI.getOperand(FIOperandNum).ChangeToRegister(BasePtr, false);
533 // Now add the frame object offset to the offset from EBP.
536 // Tail call jmp happens after FP is popped.
537 const MachineFrameInfo *MFI = MF.getFrameInfo();
538 FIOffset = MFI->getObjectOffset(FrameIndex) - TFI->getOffsetOfLocalArea();
540 FIOffset = TFI->getFrameIndexOffset(MF, FrameIndex);
542 if (BasePtr == StackPtr)
545 // The frame index format for stackmaps and patchpoints is different from the
546 // X86 format. It only has a FI and an offset.
547 if (Opc == TargetOpcode::STACKMAP || Opc == TargetOpcode::PATCHPOINT) {
548 assert(BasePtr == FramePtr && "Expected the FP as base register");
549 int64_t Offset = MI.getOperand(FIOperandNum + 1).getImm() + FIOffset;
550 MI.getOperand(FIOperandNum + 1).ChangeToImmediate(Offset);
554 if (MI.getOperand(FIOperandNum+3).isImm()) {
555 // Offset is a 32-bit integer.
556 int Imm = (int)(MI.getOperand(FIOperandNum + 3).getImm());
557 int Offset = FIOffset + Imm;
558 assert((!Is64Bit || isInt<32>((long long)FIOffset + Imm)) &&
559 "Requesting 64-bit offset in 32-bit immediate!");
560 MI.getOperand(FIOperandNum + 3).ChangeToImmediate(Offset);
562 // Offset is symbolic. This is extremely rare.
563 uint64_t Offset = FIOffset +
564 (uint64_t)MI.getOperand(FIOperandNum+3).getOffset();
565 MI.getOperand(FIOperandNum + 3).setOffset(Offset);
569 unsigned X86RegisterInfo::getFrameRegister(const MachineFunction &MF) const {
570 const TargetFrameLowering *TFI = MF.getSubtarget().getFrameLowering();
571 return TFI->hasFP(MF) ? FramePtr : StackPtr;
575 X86RegisterInfo::getPtrSizedFrameRegister(const MachineFunction &MF) const {
576 const X86Subtarget &Subtarget = MF.getSubtarget<X86Subtarget>();
577 unsigned FrameReg = getFrameRegister(MF);
578 if (Subtarget.isTarget64BitILP32())
579 FrameReg = getX86SubSuperRegister(FrameReg, MVT::i32, false);
584 unsigned getX86SubSuperRegister(unsigned Reg, MVT::SimpleValueType VT,
587 default: llvm_unreachable("Unexpected VT");
591 default: return getX86SubSuperRegister(Reg, MVT::i64);
592 case X86::SIL: case X86::SI: case X86::ESI: case X86::RSI:
594 case X86::DIL: case X86::DI: case X86::EDI: case X86::RDI:
596 case X86::BPL: case X86::BP: case X86::EBP: case X86::RBP:
598 case X86::SPL: case X86::SP: case X86::ESP: case X86::RSP:
600 case X86::AH: case X86::AL: case X86::AX: case X86::EAX: case X86::RAX:
602 case X86::DH: case X86::DL: case X86::DX: case X86::EDX: case X86::RDX:
604 case X86::CH: case X86::CL: case X86::CX: case X86::ECX: case X86::RCX:
606 case X86::BH: case X86::BL: case X86::BX: case X86::EBX: case X86::RBX:
611 default: llvm_unreachable("Unexpected register");
612 case X86::AH: case X86::AL: case X86::AX: case X86::EAX: case X86::RAX:
614 case X86::DH: case X86::DL: case X86::DX: case X86::EDX: case X86::RDX:
616 case X86::CH: case X86::CL: case X86::CX: case X86::ECX: case X86::RCX:
618 case X86::BH: case X86::BL: case X86::BX: case X86::EBX: case X86::RBX:
620 case X86::SIL: case X86::SI: case X86::ESI: case X86::RSI:
622 case X86::DIL: case X86::DI: case X86::EDI: case X86::RDI:
624 case X86::BPL: case X86::BP: case X86::EBP: case X86::RBP:
626 case X86::SPL: case X86::SP: case X86::ESP: case X86::RSP:
628 case X86::R8B: case X86::R8W: case X86::R8D: case X86::R8:
630 case X86::R9B: case X86::R9W: case X86::R9D: case X86::R9:
632 case X86::R10B: case X86::R10W: case X86::R10D: case X86::R10:
634 case X86::R11B: case X86::R11W: case X86::R11D: case X86::R11:
636 case X86::R12B: case X86::R12W: case X86::R12D: case X86::R12:
638 case X86::R13B: case X86::R13W: case X86::R13D: case X86::R13:
640 case X86::R14B: case X86::R14W: case X86::R14D: case X86::R14:
642 case X86::R15B: case X86::R15W: case X86::R15D: case X86::R15:
648 default: llvm_unreachable("Unexpected register");
649 case X86::AH: case X86::AL: case X86::AX: case X86::EAX: case X86::RAX:
651 case X86::DH: case X86::DL: case X86::DX: case X86::EDX: case X86::RDX:
653 case X86::CH: case X86::CL: case X86::CX: case X86::ECX: case X86::RCX:
655 case X86::BH: case X86::BL: case X86::BX: case X86::EBX: case X86::RBX:
657 case X86::SIL: case X86::SI: case X86::ESI: case X86::RSI:
659 case X86::DIL: case X86::DI: case X86::EDI: case X86::RDI:
661 case X86::BPL: case X86::BP: case X86::EBP: case X86::RBP:
663 case X86::SPL: case X86::SP: case X86::ESP: case X86::RSP:
665 case X86::R8B: case X86::R8W: case X86::R8D: case X86::R8:
667 case X86::R9B: case X86::R9W: case X86::R9D: case X86::R9:
669 case X86::R10B: case X86::R10W: case X86::R10D: case X86::R10:
671 case X86::R11B: case X86::R11W: case X86::R11D: case X86::R11:
673 case X86::R12B: case X86::R12W: case X86::R12D: case X86::R12:
675 case X86::R13B: case X86::R13W: case X86::R13D: case X86::R13:
677 case X86::R14B: case X86::R14W: case X86::R14D: case X86::R14:
679 case X86::R15B: case X86::R15W: case X86::R15D: case X86::R15:
684 default: llvm_unreachable("Unexpected register");
685 case X86::AH: case X86::AL: case X86::AX: case X86::EAX: case X86::RAX:
687 case X86::DH: case X86::DL: case X86::DX: case X86::EDX: case X86::RDX:
689 case X86::CH: case X86::CL: case X86::CX: case X86::ECX: case X86::RCX:
691 case X86::BH: case X86::BL: case X86::BX: case X86::EBX: case X86::RBX:
693 case X86::SIL: case X86::SI: case X86::ESI: case X86::RSI:
695 case X86::DIL: case X86::DI: case X86::EDI: case X86::RDI:
697 case X86::BPL: case X86::BP: case X86::EBP: case X86::RBP:
699 case X86::SPL: case X86::SP: case X86::ESP: case X86::RSP:
701 case X86::R8B: case X86::R8W: case X86::R8D: case X86::R8:
703 case X86::R9B: case X86::R9W: case X86::R9D: case X86::R9:
705 case X86::R10B: case X86::R10W: case X86::R10D: case X86::R10:
707 case X86::R11B: case X86::R11W: case X86::R11D: case X86::R11:
709 case X86::R12B: case X86::R12W: case X86::R12D: case X86::R12:
711 case X86::R13B: case X86::R13W: case X86::R13D: case X86::R13:
713 case X86::R14B: case X86::R14W: case X86::R14D: case X86::R14:
715 case X86::R15B: case X86::R15W: case X86::R15D: case X86::R15:
720 default: llvm_unreachable("Unexpected register");
721 case X86::AH: case X86::AL: case X86::AX: case X86::EAX: case X86::RAX:
723 case X86::DH: case X86::DL: case X86::DX: case X86::EDX: case X86::RDX:
725 case X86::CH: case X86::CL: case X86::CX: case X86::ECX: case X86::RCX:
727 case X86::BH: case X86::BL: case X86::BX: case X86::EBX: case X86::RBX:
729 case X86::SIL: case X86::SI: case X86::ESI: case X86::RSI:
731 case X86::DIL: case X86::DI: case X86::EDI: case X86::RDI:
733 case X86::BPL: case X86::BP: case X86::EBP: case X86::RBP:
735 case X86::SPL: case X86::SP: case X86::ESP: case X86::RSP:
737 case X86::R8B: case X86::R8W: case X86::R8D: case X86::R8:
739 case X86::R9B: case X86::R9W: case X86::R9D: case X86::R9:
741 case X86::R10B: case X86::R10W: case X86::R10D: case X86::R10:
743 case X86::R11B: case X86::R11W: case X86::R11D: case X86::R11:
745 case X86::R12B: case X86::R12W: case X86::R12D: case X86::R12:
747 case X86::R13B: case X86::R13W: case X86::R13D: case X86::R13:
749 case X86::R14B: case X86::R14W: case X86::R14D: case X86::R14:
751 case X86::R15B: case X86::R15W: case X86::R15D: case X86::R15:
757 unsigned get512BitSuperRegister(unsigned Reg) {
758 if (Reg >= X86::XMM0 && Reg <= X86::XMM31)
759 return X86::ZMM0 + (Reg - X86::XMM0);
760 if (Reg >= X86::YMM0 && Reg <= X86::YMM31)
761 return X86::ZMM0 + (Reg - X86::YMM0);
762 if (Reg >= X86::ZMM0 && Reg <= X86::ZMM31)
764 llvm_unreachable("Unexpected SIMD register");