1 //===-- X86MCInstLower.cpp - Convert X86 MachineInstr to an MCInst --------===//
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 code to lower X86 MachineInstrs to their corresponding
13 //===----------------------------------------------------------------------===//
15 #include "X86MCInstLower.h"
16 #include "X86AsmPrinter.h"
17 #include "X86COFFMachineModuleInfo.h"
18 #include "X86MCAsmInfo.h"
19 #include "X86MCTargetExpr.h"
20 #include "llvm/Analysis/DebugInfo.h"
21 #include "llvm/CodeGen/MachineModuleInfoImpls.h"
22 #include "llvm/MC/MCContext.h"
23 #include "llvm/MC/MCExpr.h"
24 #include "llvm/MC/MCInst.h"
25 #include "llvm/MC/MCStreamer.h"
26 #include "llvm/Target/Mangler.h"
27 #include "llvm/Support/FormattedStream.h"
28 #include "llvm/ADT/SmallString.h"
29 #include "llvm/Type.h"
33 const X86Subtarget &X86MCInstLower::getSubtarget() const {
34 return AsmPrinter.getSubtarget();
37 MachineModuleInfoMachO &X86MCInstLower::getMachOMMI() const {
38 assert(getSubtarget().isTargetDarwin() &&"Can only get MachO info on darwin");
39 return AsmPrinter.MMI->getObjFileInfo<MachineModuleInfoMachO>();
43 MCSymbol *X86MCInstLower::GetPICBaseSymbol() const {
44 const TargetLowering *TLI = AsmPrinter.TM.getTargetLowering();
45 return static_cast<const X86TargetLowering*>(TLI)->
46 getPICBaseSymbol(AsmPrinter.MF, Ctx);
49 /// LowerGlobalAddressOperand - Lower an MO_GlobalAddress operand to an
51 MCSymbol *X86MCInstLower::
52 GetGlobalAddressSymbol(const MachineOperand &MO) const {
53 const GlobalValue *GV = MO.getGlobal();
55 bool isImplicitlyPrivate = false;
56 if (MO.getTargetFlags() == X86II::MO_DARWIN_STUB ||
57 MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY ||
58 MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY_PIC_BASE ||
59 MO.getTargetFlags() == X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE)
60 isImplicitlyPrivate = true;
62 SmallString<128> Name;
63 Mang->getNameWithPrefix(Name, GV, isImplicitlyPrivate);
65 if (getSubtarget().isTargetCygMing()) {
66 X86COFFMachineModuleInfo &COFFMMI =
67 AsmPrinter.MMI->getObjFileInfo<X86COFFMachineModuleInfo>();
68 COFFMMI.DecorateCygMingName(Name, GV, *AsmPrinter.TM.getTargetData());
71 //X86MCTargetExpr::VariantKind Kind = X86MCTargetExpr::Invalid;
73 switch (MO.getTargetFlags()) {
74 default: llvm_unreachable("Unknown target flag on GV operand");
75 case X86II::MO_NO_FLAG: // No flag.
76 case X86II::MO_PIC_BASE_OFFSET: // Doesn't modify symbol name.
78 case X86II::MO_DLLIMPORT: {
79 // Handle dllimport linkage.
80 const char *Prefix = "__imp_";
81 Name.insert(Name.begin(), Prefix, Prefix+strlen(Prefix));
84 case X86II::MO_DARWIN_NONLAZY:
85 case X86II::MO_DARWIN_NONLAZY_PIC_BASE: {
86 Name += "$non_lazy_ptr";
87 MCSymbol *Sym = Ctx.GetOrCreateSymbol(Name.str());
89 MCSymbol *&StubSym = getMachOMMI().getGVStubEntry(Sym);
91 StubSym = AsmPrinter.GetGlobalValueSymbol(GV);
94 case X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE: {
95 Name += "$non_lazy_ptr";
96 MCSymbol *Sym = Ctx.GetOrCreateSymbol(Name.str());
97 MCSymbol *&StubSym = getMachOMMI().getHiddenGVStubEntry(Sym);
99 StubSym = AsmPrinter.GetGlobalValueSymbol(GV);
102 case X86II::MO_DARWIN_STUB: {
104 MCSymbol *Sym = Ctx.GetOrCreateSymbol(Name.str());
105 MCSymbol *&StubSym = getMachOMMI().getFnStubEntry(Sym);
107 StubSym = AsmPrinter.GetGlobalValueSymbol(GV);
110 // FIXME: These probably should be a modifier on the symbol or something??
111 case X86II::MO_TLSGD: Name += "@TLSGD"; break;
112 case X86II::MO_GOTTPOFF: Name += "@GOTTPOFF"; break;
113 case X86II::MO_INDNTPOFF: Name += "@INDNTPOFF"; break;
114 case X86II::MO_TPOFF: Name += "@TPOFF"; break;
115 case X86II::MO_NTPOFF: Name += "@NTPOFF"; break;
116 case X86II::MO_GOTPCREL: Name += "@GOTPCREL"; break;
117 case X86II::MO_GOT: Name += "@GOT"; break;
118 case X86II::MO_GOTOFF: Name += "@GOTOFF"; break;
119 case X86II::MO_PLT: Name += "@PLT"; break;
122 return Ctx.GetOrCreateSymbol(Name.str());
125 MCSymbol *X86MCInstLower::
126 GetExternalSymbolSymbol(const MachineOperand &MO) const {
127 SmallString<128> Name;
128 Name += AsmPrinter.MAI->getGlobalPrefix();
129 Name += MO.getSymbolName();
131 switch (MO.getTargetFlags()) {
132 default: llvm_unreachable("Unknown target flag on GV operand");
133 case X86II::MO_NO_FLAG: // No flag.
134 case X86II::MO_GOT_ABSOLUTE_ADDRESS: // Doesn't modify symbol name.
135 case X86II::MO_PIC_BASE_OFFSET: // Doesn't modify symbol name.
137 case X86II::MO_DLLIMPORT: {
138 // Handle dllimport linkage.
139 const char *Prefix = "__imp_";
140 Name.insert(Name.begin(), Prefix, Prefix+strlen(Prefix));
143 case X86II::MO_DARWIN_STUB: {
145 MCSymbol *Sym = Ctx.GetOrCreateSymbol(Name.str());
146 MCSymbol *&StubSym = getMachOMMI().getFnStubEntry(Sym);
149 Name.erase(Name.end()-5, Name.end());
150 StubSym = Ctx.GetOrCreateSymbol(Name.str());
154 // FIXME: These probably should be a modifier on the symbol or something??
155 case X86II::MO_TLSGD: Name += "@TLSGD"; break;
156 case X86II::MO_GOTTPOFF: Name += "@GOTTPOFF"; break;
157 case X86II::MO_INDNTPOFF: Name += "@INDNTPOFF"; break;
158 case X86II::MO_TPOFF: Name += "@TPOFF"; break;
159 case X86II::MO_NTPOFF: Name += "@NTPOFF"; break;
160 case X86II::MO_GOTPCREL: Name += "@GOTPCREL"; break;
161 case X86II::MO_GOT: Name += "@GOT"; break;
162 case X86II::MO_GOTOFF: Name += "@GOTOFF"; break;
163 case X86II::MO_PLT: Name += "@PLT"; break;
166 return Ctx.GetOrCreateSymbol(Name.str());
169 MCSymbol *X86MCInstLower::GetJumpTableSymbol(const MachineOperand &MO) const {
170 SmallString<256> Name;
171 // FIXME: Use AsmPrinter.GetJTISymbol. @TLSGD shouldn't be part of the symbol
173 raw_svector_ostream(Name) << AsmPrinter.MAI->getPrivateGlobalPrefix() << "JTI"
174 << AsmPrinter.getFunctionNumber() << '_' << MO.getIndex();
176 switch (MO.getTargetFlags()) {
178 llvm_unreachable("Unknown target flag on GV operand");
179 case X86II::MO_NO_FLAG: // No flag.
180 case X86II::MO_PIC_BASE_OFFSET:
181 case X86II::MO_DARWIN_NONLAZY_PIC_BASE:
182 case X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE:
184 // FIXME: These probably should be a modifier on the symbol or something??
185 case X86II::MO_TLSGD: Name += "@TLSGD"; break;
186 case X86II::MO_GOTTPOFF: Name += "@GOTTPOFF"; break;
187 case X86II::MO_INDNTPOFF: Name += "@INDNTPOFF"; break;
188 case X86II::MO_TPOFF: Name += "@TPOFF"; break;
189 case X86II::MO_NTPOFF: Name += "@NTPOFF"; break;
190 case X86II::MO_GOTPCREL: Name += "@GOTPCREL"; break;
191 case X86II::MO_GOT: Name += "@GOT"; break;
192 case X86II::MO_GOTOFF: Name += "@GOTOFF"; break;
193 case X86II::MO_PLT: Name += "@PLT"; break;
196 // Create a symbol for the name.
197 return Ctx.GetOrCreateSymbol(Name.str());
201 MCSymbol *X86MCInstLower::
202 GetConstantPoolIndexSymbol(const MachineOperand &MO) const {
203 SmallString<256> Name;
204 // FIXME: USe AsmPrinter.GetCPISymbol. @TLSGD shouldn't be part of the symbol
206 raw_svector_ostream(Name) << AsmPrinter.MAI->getPrivateGlobalPrefix() << "CPI"
207 << AsmPrinter.getFunctionNumber() << '_' << MO.getIndex();
209 switch (MO.getTargetFlags()) {
211 llvm_unreachable("Unknown target flag on GV operand");
212 case X86II::MO_NO_FLAG: // No flag.
213 case X86II::MO_PIC_BASE_OFFSET:
214 case X86II::MO_DARWIN_NONLAZY_PIC_BASE:
215 case X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE:
217 // FIXME: These probably should be a modifier on the symbol or something??
218 case X86II::MO_TLSGD: Name += "@TLSGD"; break;
219 case X86II::MO_GOTTPOFF: Name += "@GOTTPOFF"; break;
220 case X86II::MO_INDNTPOFF: Name += "@INDNTPOFF"; break;
221 case X86II::MO_TPOFF: Name += "@TPOFF"; break;
222 case X86II::MO_NTPOFF: Name += "@NTPOFF"; break;
223 case X86II::MO_GOTPCREL: Name += "@GOTPCREL"; break;
224 case X86II::MO_GOT: Name += "@GOT"; break;
225 case X86II::MO_GOTOFF: Name += "@GOTOFF"; break;
226 case X86II::MO_PLT: Name += "@PLT"; break;
229 // Create a symbol for the name.
230 return Ctx.GetOrCreateSymbol(Name.str());
233 MCSymbol *X86MCInstLower::
234 GetBlockAddressSymbol(const MachineOperand &MO) const {
235 const char *Suffix = "";
236 switch (MO.getTargetFlags()) {
237 default: llvm_unreachable("Unknown target flag on BA operand");
238 case X86II::MO_NO_FLAG: break; // No flag.
239 case X86II::MO_PIC_BASE_OFFSET: break; // Doesn't modify symbol name.
240 case X86II::MO_GOTOFF: Suffix = "@GOTOFF"; break;
243 return AsmPrinter.GetBlockAddressSymbol(MO.getBlockAddress(), Suffix);
246 MCOperand X86MCInstLower::LowerSymbolOperand(const MachineOperand &MO,
247 MCSymbol *Sym) const {
248 // FIXME: We would like an efficient form for this, so we don't have to do a
249 // lot of extra uniquing.
250 const MCExpr *Expr = MCSymbolRefExpr::Create(Sym, Ctx);
252 switch (MO.getTargetFlags()) {
253 default: llvm_unreachable("Unknown target flag on GV operand");
254 case X86II::MO_NO_FLAG: // No flag.
256 // These affect the name of the symbol, not any suffix.
257 case X86II::MO_DARWIN_NONLAZY:
258 case X86II::MO_DLLIMPORT:
259 case X86II::MO_DARWIN_STUB:
260 case X86II::MO_TLSGD:
261 case X86II::MO_GOTTPOFF:
262 case X86II::MO_INDNTPOFF:
263 case X86II::MO_TPOFF:
264 case X86II::MO_NTPOFF:
265 case X86II::MO_GOTPCREL:
267 case X86II::MO_GOTOFF:
270 case X86II::MO_PIC_BASE_OFFSET:
271 case X86II::MO_DARWIN_NONLAZY_PIC_BASE:
272 case X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE:
273 // Subtract the pic base.
274 Expr = MCBinaryExpr::CreateSub(Expr,
275 MCSymbolRefExpr::Create(GetPICBaseSymbol(), Ctx),
280 if (!MO.isJTI() && MO.getOffset())
281 Expr = MCBinaryExpr::CreateAdd(Expr,
282 MCConstantExpr::Create(MO.getOffset(), Ctx),
284 return MCOperand::CreateExpr(Expr);
289 static void lower_subreg32(MCInst *MI, unsigned OpNo) {
290 // Convert registers in the addr mode according to subreg32.
291 unsigned Reg = MI->getOperand(OpNo).getReg();
293 MI->getOperand(OpNo).setReg(getX86SubSuperRegister(Reg, MVT::i32));
296 static void lower_lea64_32mem(MCInst *MI, unsigned OpNo) {
297 // Convert registers in the addr mode according to subreg64.
298 for (unsigned i = 0; i != 4; ++i) {
299 if (!MI->getOperand(OpNo+i).isReg()) continue;
301 unsigned Reg = MI->getOperand(OpNo+i).getReg();
302 if (Reg == 0) continue;
304 MI->getOperand(OpNo+i).setReg(getX86SubSuperRegister(Reg, MVT::i64));
308 /// LowerSubReg32_Op0 - Things like MOVZX16rr8 -> MOVZX32rr8.
309 static void LowerSubReg32_Op0(MCInst &OutMI, unsigned NewOpc) {
310 OutMI.setOpcode(NewOpc);
311 lower_subreg32(&OutMI, 0);
313 /// LowerUnaryToTwoAddr - R = setb -> R = sbb R, R
314 static void LowerUnaryToTwoAddr(MCInst &OutMI, unsigned NewOpc) {
315 OutMI.setOpcode(NewOpc);
316 OutMI.addOperand(OutMI.getOperand(0));
317 OutMI.addOperand(OutMI.getOperand(0));
321 void X86MCInstLower::Lower(const MachineInstr *MI, MCInst &OutMI) const {
322 OutMI.setOpcode(MI->getOpcode());
324 for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
325 const MachineOperand &MO = MI->getOperand(i);
328 switch (MO.getType()) {
331 llvm_unreachable("unknown operand type");
332 case MachineOperand::MO_Register:
333 // Ignore all implicit register operands.
334 if (MO.isImplicit()) continue;
335 MCOp = MCOperand::CreateReg(MO.getReg());
337 case MachineOperand::MO_Immediate:
338 MCOp = MCOperand::CreateImm(MO.getImm());
340 case MachineOperand::MO_MachineBasicBlock:
341 MCOp = MCOperand::CreateExpr(MCSymbolRefExpr::Create(
342 MO.getMBB()->getSymbol(Ctx), Ctx));
344 case MachineOperand::MO_GlobalAddress:
345 MCOp = LowerSymbolOperand(MO, GetGlobalAddressSymbol(MO));
347 case MachineOperand::MO_ExternalSymbol:
348 MCOp = LowerSymbolOperand(MO, GetExternalSymbolSymbol(MO));
350 case MachineOperand::MO_JumpTableIndex:
351 MCOp = LowerSymbolOperand(MO, GetJumpTableSymbol(MO));
353 case MachineOperand::MO_ConstantPoolIndex:
354 MCOp = LowerSymbolOperand(MO, GetConstantPoolIndexSymbol(MO));
356 case MachineOperand::MO_BlockAddress:
357 MCOp = LowerSymbolOperand(MO, GetBlockAddressSymbol(MO));
361 OutMI.addOperand(MCOp);
364 // Handle a few special cases to eliminate operand modifiers.
365 switch (OutMI.getOpcode()) {
366 case X86::LEA64_32r: // Handle 'subreg rewriting' for the lea64_32mem operand.
367 lower_lea64_32mem(&OutMI, 1);
369 case X86::MOVZX16rr8: LowerSubReg32_Op0(OutMI, X86::MOVZX32rr8); break;
370 case X86::MOVZX16rm8: LowerSubReg32_Op0(OutMI, X86::MOVZX32rm8); break;
371 case X86::MOVSX16rr8: LowerSubReg32_Op0(OutMI, X86::MOVSX32rr8); break;
372 case X86::MOVSX16rm8: LowerSubReg32_Op0(OutMI, X86::MOVSX32rm8); break;
373 case X86::MOVZX64rr32: LowerSubReg32_Op0(OutMI, X86::MOV32rr); break;
374 case X86::MOVZX64rm32: LowerSubReg32_Op0(OutMI, X86::MOV32rm); break;
375 case X86::MOV64ri64i32: LowerSubReg32_Op0(OutMI, X86::MOV32ri); break;
376 case X86::MOVZX64rr8: LowerSubReg32_Op0(OutMI, X86::MOVZX32rr8); break;
377 case X86::MOVZX64rm8: LowerSubReg32_Op0(OutMI, X86::MOVZX32rm8); break;
378 case X86::MOVZX64rr16: LowerSubReg32_Op0(OutMI, X86::MOVZX32rr16); break;
379 case X86::MOVZX64rm16: LowerSubReg32_Op0(OutMI, X86::MOVZX32rm16); break;
380 case X86::SETB_C8r: LowerUnaryToTwoAddr(OutMI, X86::SBB8rr); break;
381 case X86::SETB_C16r: LowerUnaryToTwoAddr(OutMI, X86::SBB16rr); break;
382 case X86::SETB_C32r: LowerUnaryToTwoAddr(OutMI, X86::SBB32rr); break;
383 case X86::SETB_C64r: LowerUnaryToTwoAddr(OutMI, X86::SBB64rr); break;
384 case X86::MOV8r0: LowerUnaryToTwoAddr(OutMI, X86::XOR8rr); break;
385 case X86::MOV32r0: LowerUnaryToTwoAddr(OutMI, X86::XOR32rr); break;
386 case X86::MMX_V_SET0: LowerUnaryToTwoAddr(OutMI, X86::MMX_PXORrr); break;
387 case X86::MMX_V_SETALLONES:
388 LowerUnaryToTwoAddr(OutMI, X86::MMX_PCMPEQDrr); break;
389 case X86::FsFLD0SS: LowerUnaryToTwoAddr(OutMI, X86::PXORrr); break;
390 case X86::FsFLD0SD: LowerUnaryToTwoAddr(OutMI, X86::PXORrr); break;
391 case X86::V_SET0: LowerUnaryToTwoAddr(OutMI, X86::XORPSrr); break;
392 case X86::V_SETALLONES: LowerUnaryToTwoAddr(OutMI, X86::PCMPEQDrr); break;
395 LowerSubReg32_Op0(OutMI, X86::MOV32r0); // MOV16r0 -> MOV32r0
396 LowerUnaryToTwoAddr(OutMI, X86::XOR32rr); // MOV32r0 -> XOR32rr
399 LowerSubReg32_Op0(OutMI, X86::MOV32r0); // MOV64r0 -> MOV32r0
400 LowerUnaryToTwoAddr(OutMI, X86::XOR32rr); // MOV32r0 -> XOR32rr
407 void X86AsmPrinter::EmitInstruction(const MachineInstr *MI) {
408 X86MCInstLower MCInstLowering(OutContext, Mang, *this);
409 switch (MI->getOpcode()) {
410 case TargetInstrInfo::DEBUG_VALUE: {
411 // FIXME: if this is implemented for another target before it goes
412 // away completely, the common part should be moved into AsmPrinter.
415 O << '\t' << MAI->getCommentString() << "DEBUG_VALUE: ";
416 unsigned NOps = MI->getNumOperands();
417 // cast away const; DIetc do not take const operands for some reason.
418 DIVariable V((MDNode*)(MI->getOperand(NOps-1).getMetadata()));
422 // Register or immediate value. Register 0 means undef.
423 assert(MI->getOperand(0).getType()==MachineOperand::MO_Register ||
424 MI->getOperand(0).getType()==MachineOperand::MO_Immediate ||
425 MI->getOperand(0).getType()==MachineOperand::MO_FPImmediate);
426 if (MI->getOperand(0).getType()==MachineOperand::MO_Register &&
427 MI->getOperand(0).getReg()==0) {
428 // Suppress offset in this case, it is not meaningful.
431 } else if (MI->getOperand(0).getType()==MachineOperand::MO_FPImmediate) {
432 // This is more naturally done in printOperand, but since the only use
433 // of such an operand is in this comment and that is temporary (and it's
434 // ugly), we prefer to keep this localized.
435 // The include of Type.h may be removable when this code is.
436 if (MI->getOperand(0).getFPImm()->getType()->isFloatTy() ||
437 MI->getOperand(0).getFPImm()->getType()->isDoubleTy())
438 MI->getOperand(0).print(O, &TM);
440 // There is no good way to print long double. Convert a copy to
441 // double. Ah well, it's only a comment.
443 APFloat APF = APFloat(MI->getOperand(0).getFPImm()->getValueAPF());
444 APF.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven,
446 O << "(long double) " << APF.convertToDouble();
451 // Frame address. Currently handles register +- offset only.
452 assert(MI->getOperand(0).getType()==MachineOperand::MO_Register);
453 assert(MI->getOperand(3).getType()==MachineOperand::MO_Immediate);
454 O << '['; printOperand(MI, 0); O << '+'; printOperand(MI, 3); O << ']';
457 printOperand(MI, NOps-2);
461 case X86::MOVPC32r: {
463 // This is a pseudo op for a two instruction sequence with a label, which
470 MCSymbol *PICBase = MCInstLowering.GetPICBaseSymbol();
471 TmpInst.setOpcode(X86::CALLpcrel32);
472 // FIXME: We would like an efficient form for this, so we don't have to do a
473 // lot of extra uniquing.
474 TmpInst.addOperand(MCOperand::CreateExpr(MCSymbolRefExpr::Create(PICBase,
476 OutStreamer.EmitInstruction(TmpInst);
479 OutStreamer.EmitLabel(PICBase);
482 TmpInst.setOpcode(X86::POP32r);
483 TmpInst.getOperand(0) = MCOperand::CreateReg(MI->getOperand(0).getReg());
484 OutStreamer.EmitInstruction(TmpInst);
489 // Lower the MO_GOT_ABSOLUTE_ADDRESS form of ADD32ri.
490 if (MI->getOperand(2).getTargetFlags() != X86II::MO_GOT_ABSOLUTE_ADDRESS)
493 // Okay, we have something like:
494 // EAX = ADD32ri EAX, MO_GOT_ABSOLUTE_ADDRESS(@MYGLOBAL)
496 // For this, we want to print something like:
497 // MYGLOBAL + (. - PICBASE)
498 // However, we can't generate a ".", so just emit a new label here and refer
499 // to it. We know that this operand flag occurs at most once per function.
500 const char *Prefix = MAI->getPrivateGlobalPrefix();
501 MCSymbol *DotSym = OutContext.GetOrCreateSymbol(Twine(Prefix)+"picbaseref"+
502 Twine(getFunctionNumber()));
503 OutStreamer.EmitLabel(DotSym);
505 // Now that we have emitted the label, lower the complex operand expression.
506 MCSymbol *OpSym = MCInstLowering.GetExternalSymbolSymbol(MI->getOperand(2));
508 const MCExpr *DotExpr = MCSymbolRefExpr::Create(DotSym, OutContext);
509 const MCExpr *PICBase =
510 MCSymbolRefExpr::Create(MCInstLowering.GetPICBaseSymbol(), OutContext);
511 DotExpr = MCBinaryExpr::CreateSub(DotExpr, PICBase, OutContext);
513 DotExpr = MCBinaryExpr::CreateAdd(MCSymbolRefExpr::Create(OpSym,OutContext),
514 DotExpr, OutContext);
517 TmpInst.setOpcode(X86::ADD32ri);
518 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
519 TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(1).getReg()));
520 TmpInst.addOperand(MCOperand::CreateExpr(DotExpr));
521 OutStreamer.EmitInstruction(TmpInst);
527 MCInstLowering.Lower(MI, TmpInst);
530 OutStreamer.EmitInstruction(TmpInst);