1 //===-- X86AsmPrinter.cpp - Convert X86 LLVM code to AT&T assembly --------===//
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 a printer that converts from our internal representation
11 // of machine-dependent LLVM code to X86 machine code.
13 //===----------------------------------------------------------------------===//
15 #include "X86AsmPrinter.h"
16 #include "X86ATTInstPrinter.h"
17 #include "X86IntelInstPrinter.h"
18 #include "X86MCInstLower.h"
21 #include "X86COFFMachineModuleInfo.h"
22 #include "X86MachineFunctionInfo.h"
23 #include "X86TargetMachine.h"
24 #include "llvm/CallingConv.h"
25 #include "llvm/DerivedTypes.h"
26 #include "llvm/Module.h"
27 #include "llvm/Type.h"
28 #include "llvm/Assembly/Writer.h"
29 #include "llvm/MC/MCAsmInfo.h"
30 #include "llvm/MC/MCContext.h"
31 #include "llvm/MC/MCExpr.h"
32 #include "llvm/MC/MCSectionMachO.h"
33 #include "llvm/MC/MCStreamer.h"
34 #include "llvm/MC/MCSymbol.h"
35 #include "llvm/CodeGen/MachineJumpTableInfo.h"
36 #include "llvm/CodeGen/MachineModuleInfoImpls.h"
37 #include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
38 #include "llvm/Support/ErrorHandling.h"
39 #include "llvm/Target/Mangler.h"
40 #include "llvm/Target/TargetOptions.h"
41 #include "llvm/Target/TargetRegistry.h"
42 #include "llvm/ADT/SmallString.h"
45 //===----------------------------------------------------------------------===//
46 // Primitive Helper Functions.
47 //===----------------------------------------------------------------------===//
49 void X86AsmPrinter::PrintPICBaseSymbol(raw_ostream &O) const {
50 const TargetLowering *TLI = TM.getTargetLowering();
51 O << *static_cast<const X86TargetLowering*>(TLI)->getPICBaseSymbol(MF,
55 /// runOnMachineFunction - Emit the function body.
57 bool X86AsmPrinter::runOnMachineFunction(MachineFunction &MF) {
58 SetupMachineFunction(MF);
60 if (Subtarget->isTargetCOFF()) {
61 bool Intrn = MF.getFunction()->hasInternalLinkage();
62 OutStreamer.BeginCOFFSymbolDef(CurrentFnSym);
63 OutStreamer.EmitCOFFSymbolStorageClass(Intrn ? COFF::C_STAT : COFF::C_EXT);
64 OutStreamer.EmitCOFFSymbolType(COFF::DT_FCN << COFF::N_BTSHFT);
65 OutStreamer.EndCOFFSymbolDef();
68 // Have common code print out the function header with linkage info etc.
71 // Emit the rest of the function body.
74 // We didn't modify anything.
78 /// printSymbolOperand - Print a raw symbol reference operand. This handles
79 /// jump tables, constant pools, global address and external symbols, all of
80 /// which print to a label with various suffixes for relocation types etc.
81 void X86AsmPrinter::printSymbolOperand(const MachineOperand &MO,
83 switch (MO.getType()) {
84 default: llvm_unreachable("unknown symbol type!");
85 case MachineOperand::MO_JumpTableIndex:
86 O << *GetJTISymbol(MO.getIndex());
88 case MachineOperand::MO_ConstantPoolIndex:
89 O << *GetCPISymbol(MO.getIndex());
90 printOffset(MO.getOffset(), O);
92 case MachineOperand::MO_GlobalAddress: {
93 const GlobalValue *GV = MO.getGlobal();
96 if (MO.getTargetFlags() == X86II::MO_DARWIN_STUB)
97 GVSym = GetSymbolWithGlobalValueBase(GV, "$stub");
98 else if (MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY ||
99 MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY_PIC_BASE ||
100 MO.getTargetFlags() == X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE)
101 GVSym = GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
103 GVSym = Mang->getSymbol(GV);
105 // Handle dllimport linkage.
106 if (MO.getTargetFlags() == X86II::MO_DLLIMPORT)
107 GVSym = OutContext.GetOrCreateSymbol(Twine("__imp_") + GVSym->getName());
109 if (MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY ||
110 MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY_PIC_BASE) {
111 MCSymbol *Sym = GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
112 MachineModuleInfoImpl::StubValueTy &StubSym =
113 MMI->getObjFileInfo<MachineModuleInfoMachO>().getGVStubEntry(Sym);
114 if (StubSym.getPointer() == 0)
115 StubSym = MachineModuleInfoImpl::
116 StubValueTy(Mang->getSymbol(GV), !GV->hasInternalLinkage());
117 } else if (MO.getTargetFlags() == X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE){
118 MCSymbol *Sym = GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
119 MachineModuleInfoImpl::StubValueTy &StubSym =
120 MMI->getObjFileInfo<MachineModuleInfoMachO>().getHiddenGVStubEntry(Sym);
121 if (StubSym.getPointer() == 0)
122 StubSym = MachineModuleInfoImpl::
123 StubValueTy(Mang->getSymbol(GV), !GV->hasInternalLinkage());
124 } else if (MO.getTargetFlags() == X86II::MO_DARWIN_STUB) {
125 MCSymbol *Sym = GetSymbolWithGlobalValueBase(GV, "$stub");
126 MachineModuleInfoImpl::StubValueTy &StubSym =
127 MMI->getObjFileInfo<MachineModuleInfoMachO>().getFnStubEntry(Sym);
128 if (StubSym.getPointer() == 0)
129 StubSym = MachineModuleInfoImpl::
130 StubValueTy(Mang->getSymbol(GV), !GV->hasInternalLinkage());
133 // If the name begins with a dollar-sign, enclose it in parens. We do this
134 // to avoid having it look like an integer immediate to the assembler.
135 if (GVSym->getName()[0] != '$')
138 O << '(' << *GVSym << ')';
139 printOffset(MO.getOffset(), O);
142 case MachineOperand::MO_ExternalSymbol: {
143 const MCSymbol *SymToPrint;
144 if (MO.getTargetFlags() == X86II::MO_DARWIN_STUB) {
145 SmallString<128> TempNameStr;
146 TempNameStr += StringRef(MO.getSymbolName());
147 TempNameStr += StringRef("$stub");
149 MCSymbol *Sym = GetExternalSymbolSymbol(TempNameStr.str());
150 MachineModuleInfoImpl::StubValueTy &StubSym =
151 MMI->getObjFileInfo<MachineModuleInfoMachO>().getFnStubEntry(Sym);
152 if (StubSym.getPointer() == 0) {
153 TempNameStr.erase(TempNameStr.end()-5, TempNameStr.end());
154 StubSym = MachineModuleInfoImpl::
155 StubValueTy(OutContext.GetOrCreateSymbol(TempNameStr.str()),
158 SymToPrint = StubSym.getPointer();
160 SymToPrint = GetExternalSymbolSymbol(MO.getSymbolName());
163 // If the name begins with a dollar-sign, enclose it in parens. We do this
164 // to avoid having it look like an integer immediate to the assembler.
165 if (SymToPrint->getName()[0] != '$')
168 O << '(' << *SymToPrint << '(';
173 switch (MO.getTargetFlags()) {
175 llvm_unreachable("Unknown target flag on GV operand");
176 case X86II::MO_NO_FLAG: // No flag.
178 case X86II::MO_DARWIN_NONLAZY:
179 case X86II::MO_DLLIMPORT:
180 case X86II::MO_DARWIN_STUB:
181 // These affect the name of the symbol, not any suffix.
183 case X86II::MO_GOT_ABSOLUTE_ADDRESS:
185 PrintPICBaseSymbol(O);
188 case X86II::MO_PIC_BASE_OFFSET:
189 case X86II::MO_DARWIN_NONLAZY_PIC_BASE:
190 case X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE:
192 PrintPICBaseSymbol(O);
194 case X86II::MO_TLSGD: O << "@TLSGD"; break;
195 case X86II::MO_GOTTPOFF: O << "@GOTTPOFF"; break;
196 case X86II::MO_INDNTPOFF: O << "@INDNTPOFF"; break;
197 case X86II::MO_TPOFF: O << "@TPOFF"; break;
198 case X86II::MO_NTPOFF: O << "@NTPOFF"; break;
199 case X86II::MO_GOTPCREL: O << "@GOTPCREL"; break;
200 case X86II::MO_GOT: O << "@GOT"; break;
201 case X86II::MO_GOTOFF: O << "@GOTOFF"; break;
202 case X86II::MO_PLT: O << "@PLT"; break;
206 /// print_pcrel_imm - This is used to print an immediate value that ends up
207 /// being encoded as a pc-relative value. These print slightly differently, for
208 /// example, a $ is not emitted.
209 void X86AsmPrinter::print_pcrel_imm(const MachineInstr *MI, unsigned OpNo,
211 const MachineOperand &MO = MI->getOperand(OpNo);
212 switch (MO.getType()) {
213 default: llvm_unreachable("Unknown pcrel immediate operand");
214 case MachineOperand::MO_Immediate:
217 case MachineOperand::MO_MachineBasicBlock:
218 O << *MO.getMBB()->getSymbol();
220 case MachineOperand::MO_GlobalAddress:
221 case MachineOperand::MO_ExternalSymbol:
222 printSymbolOperand(MO, O);
228 void X86AsmPrinter::printOperand(const MachineInstr *MI, unsigned OpNo,
229 raw_ostream &O, const char *Modifier) {
230 const MachineOperand &MO = MI->getOperand(OpNo);
231 switch (MO.getType()) {
232 default: llvm_unreachable("unknown operand type!");
233 case MachineOperand::MO_Register: {
235 unsigned Reg = MO.getReg();
236 if (Modifier && strncmp(Modifier, "subreg", strlen("subreg")) == 0) {
237 EVT VT = (strcmp(Modifier+6,"64") == 0) ?
238 MVT::i64 : ((strcmp(Modifier+6, "32") == 0) ? MVT::i32 :
239 ((strcmp(Modifier+6,"16") == 0) ? MVT::i16 : MVT::i8));
240 Reg = getX86SubSuperRegister(Reg, VT);
242 O << X86ATTInstPrinter::getRegisterName(Reg);
246 case MachineOperand::MO_Immediate:
247 O << '$' << MO.getImm();
250 case MachineOperand::MO_JumpTableIndex:
251 case MachineOperand::MO_ConstantPoolIndex:
252 case MachineOperand::MO_GlobalAddress:
253 case MachineOperand::MO_ExternalSymbol: {
255 printSymbolOperand(MO, O);
261 void X86AsmPrinter::printSSECC(const MachineInstr *MI, unsigned Op,
263 unsigned char value = MI->getOperand(Op).getImm();
264 assert(value <= 7 && "Invalid ssecc argument!");
266 case 0: O << "eq"; break;
267 case 1: O << "lt"; break;
268 case 2: O << "le"; break;
269 case 3: O << "unord"; break;
270 case 4: O << "neq"; break;
271 case 5: O << "nlt"; break;
272 case 6: O << "nle"; break;
273 case 7: O << "ord"; break;
277 void X86AsmPrinter::printLeaMemReference(const MachineInstr *MI, unsigned Op,
278 raw_ostream &O, const char *Modifier) {
279 const MachineOperand &BaseReg = MI->getOperand(Op);
280 const MachineOperand &IndexReg = MI->getOperand(Op+2);
281 const MachineOperand &DispSpec = MI->getOperand(Op+3);
283 // If we really don't want to print out (rip), don't.
284 bool HasBaseReg = BaseReg.getReg() != 0;
285 if (HasBaseReg && Modifier && !strcmp(Modifier, "no-rip") &&
286 BaseReg.getReg() == X86::RIP)
289 // HasParenPart - True if we will print out the () part of the mem ref.
290 bool HasParenPart = IndexReg.getReg() || HasBaseReg;
292 if (DispSpec.isImm()) {
293 int DispVal = DispSpec.getImm();
294 if (DispVal || !HasParenPart)
297 assert(DispSpec.isGlobal() || DispSpec.isCPI() ||
298 DispSpec.isJTI() || DispSpec.isSymbol());
299 printSymbolOperand(MI->getOperand(Op+3), O);
303 assert(IndexReg.getReg() != X86::ESP &&
304 "X86 doesn't allow scaling by ESP");
308 printOperand(MI, Op, O, Modifier);
310 if (IndexReg.getReg()) {
312 printOperand(MI, Op+2, O, Modifier);
313 unsigned ScaleVal = MI->getOperand(Op+1).getImm();
315 O << ',' << ScaleVal;
321 void X86AsmPrinter::printMemReference(const MachineInstr *MI, unsigned Op,
322 raw_ostream &O, const char *Modifier) {
323 assert(isMem(MI, Op) && "Invalid memory reference!");
324 const MachineOperand &Segment = MI->getOperand(Op+4);
325 if (Segment.getReg()) {
326 printOperand(MI, Op+4, O, Modifier);
329 printLeaMemReference(MI, Op, O, Modifier);
332 void X86AsmPrinter::printPICLabel(const MachineInstr *MI, unsigned Op,
334 PrintPICBaseSymbol(O);
336 PrintPICBaseSymbol(O);
340 bool X86AsmPrinter::printAsmMRegister(const MachineOperand &MO, char Mode,
342 unsigned Reg = MO.getReg();
344 default: return true; // Unknown mode.
345 case 'b': // Print QImode register
346 Reg = getX86SubSuperRegister(Reg, MVT::i8);
348 case 'h': // Print QImode high register
349 Reg = getX86SubSuperRegister(Reg, MVT::i8, true);
351 case 'w': // Print HImode register
352 Reg = getX86SubSuperRegister(Reg, MVT::i16);
354 case 'k': // Print SImode register
355 Reg = getX86SubSuperRegister(Reg, MVT::i32);
357 case 'q': // Print DImode register
358 Reg = getX86SubSuperRegister(Reg, MVT::i64);
362 O << '%' << X86ATTInstPrinter::getRegisterName(Reg);
366 /// PrintAsmOperand - Print out an operand for an inline asm expression.
368 bool X86AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
370 const char *ExtraCode, raw_ostream &O) {
371 // Does this asm operand have a single letter operand modifier?
372 if (ExtraCode && ExtraCode[0]) {
373 if (ExtraCode[1] != 0) return true; // Unknown modifier.
375 const MachineOperand &MO = MI->getOperand(OpNo);
377 switch (ExtraCode[0]) {
378 default: return true; // Unknown modifier.
379 case 'a': // This is an address. Currently only 'i' and 'r' are expected.
384 if (MO.isGlobal() || MO.isCPI() || MO.isJTI() || MO.isSymbol()) {
385 printSymbolOperand(MO, O);
390 printOperand(MI, OpNo, O);
396 case 'c': // Don't print "$" before a global var name or constant.
399 else if (MO.isGlobal() || MO.isCPI() || MO.isJTI() || MO.isSymbol())
400 printSymbolOperand(MO, O);
402 printOperand(MI, OpNo, O);
405 case 'A': // Print '*' before a register (it must be a register)
408 printOperand(MI, OpNo, O);
413 case 'b': // Print QImode register
414 case 'h': // Print QImode high register
415 case 'w': // Print HImode register
416 case 'k': // Print SImode register
417 case 'q': // Print DImode register
419 return printAsmMRegister(MO, ExtraCode[0], O);
420 printOperand(MI, OpNo, O);
423 case 'P': // This is the operand of a call, treat specially.
424 print_pcrel_imm(MI, OpNo, O);
427 case 'n': // Negate the immediate or print a '-' before the operand.
428 // Note: this is a temporary solution. It should be handled target
429 // independently as part of the 'MC' work.
438 printOperand(MI, OpNo, O);
442 bool X86AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
443 unsigned OpNo, unsigned AsmVariant,
444 const char *ExtraCode,
446 if (ExtraCode && ExtraCode[0]) {
447 if (ExtraCode[1] != 0) return true; // Unknown modifier.
449 switch (ExtraCode[0]) {
450 default: return true; // Unknown modifier.
451 case 'b': // Print QImode register
452 case 'h': // Print QImode high register
453 case 'w': // Print HImode register
454 case 'k': // Print SImode register
455 case 'q': // Print SImode register
456 // These only apply to registers, ignore on mem.
458 case 'P': // Don't print @PLT, but do print as memory.
459 printMemReference(MI, OpNo, O, "no-rip");
463 printMemReference(MI, OpNo, O);
467 void X86AsmPrinter::EmitStartOfAsmFile(Module &M) {
468 if (Subtarget->isTargetDarwin())
469 OutStreamer.SwitchSection(getObjFileLowering().getTextSection());
473 void X86AsmPrinter::EmitEndOfAsmFile(Module &M) {
474 if (Subtarget->isTargetDarwin()) {
475 // All darwin targets use mach-o.
476 MachineModuleInfoMachO &MMIMacho =
477 MMI->getObjFileInfo<MachineModuleInfoMachO>();
479 // Output stubs for dynamically-linked functions.
480 MachineModuleInfoMachO::SymbolListTy Stubs;
482 Stubs = MMIMacho.GetFnStubList();
483 if (!Stubs.empty()) {
484 const MCSection *TheSection =
485 OutContext.getMachOSection("__IMPORT", "__jump_table",
486 MCSectionMachO::S_SYMBOL_STUBS |
487 MCSectionMachO::S_ATTR_SELF_MODIFYING_CODE |
488 MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
489 5, SectionKind::getMetadata());
490 OutStreamer.SwitchSection(TheSection);
492 for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
494 OutStreamer.EmitLabel(Stubs[i].first);
495 // .indirect_symbol _foo
496 OutStreamer.EmitSymbolAttribute(Stubs[i].second.getPointer(),
497 MCSA_IndirectSymbol);
498 // hlt; hlt; hlt; hlt; hlt hlt = 0xf4 = -12.
499 const char HltInsts[] = { -12, -12, -12, -12, -12 };
500 OutStreamer.EmitBytes(StringRef(HltInsts, 5), 0/*addrspace*/);
504 OutStreamer.AddBlankLine();
507 // Output stubs for external and common global variables.
508 Stubs = MMIMacho.GetGVStubList();
509 if (!Stubs.empty()) {
510 const MCSection *TheSection =
511 OutContext.getMachOSection("__IMPORT", "__pointers",
512 MCSectionMachO::S_NON_LAZY_SYMBOL_POINTERS,
513 SectionKind::getMetadata());
514 OutStreamer.SwitchSection(TheSection);
516 for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
517 // L_foo$non_lazy_ptr:
518 OutStreamer.EmitLabel(Stubs[i].first);
519 // .indirect_symbol _foo
520 MachineModuleInfoImpl::StubValueTy &MCSym = Stubs[i].second;
521 OutStreamer.EmitSymbolAttribute(MCSym.getPointer(),
522 MCSA_IndirectSymbol);
525 // External to current translation unit.
526 OutStreamer.EmitIntValue(0, 4/*size*/, 0/*addrspace*/);
528 // Internal to current translation unit.
530 // When we place the LSDA into the TEXT section, the type info
531 // pointers need to be indirect and pc-rel. We accomplish this by
532 // using NLPs. However, sometimes the types are local to the file. So
533 // we need to fill in the value for the NLP in those cases.
534 OutStreamer.EmitValue(MCSymbolRefExpr::Create(MCSym.getPointer(),
536 4/*size*/, 0/*addrspace*/);
539 OutStreamer.AddBlankLine();
542 Stubs = MMIMacho.GetHiddenGVStubList();
543 if (!Stubs.empty()) {
544 OutStreamer.SwitchSection(getObjFileLowering().getDataSection());
547 for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
548 // L_foo$non_lazy_ptr:
549 OutStreamer.EmitLabel(Stubs[i].first);
551 OutStreamer.EmitValue(MCSymbolRefExpr::
552 Create(Stubs[i].second.getPointer(),
554 4/*size*/, 0/*addrspace*/);
557 OutStreamer.AddBlankLine();
560 // Funny Darwin hack: This flag tells the linker that no global symbols
561 // contain code that falls through to other global symbols (e.g. the obvious
562 // implementation of multiple entry points). If this doesn't occur, the
563 // linker can safely perform dead code stripping. Since LLVM never
564 // generates code that does this, it is always safe to set.
565 OutStreamer.EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
568 if (Subtarget->isTargetCOFF()) {
569 X86COFFMachineModuleInfo &COFFMMI =
570 MMI->getObjFileInfo<X86COFFMachineModuleInfo>();
572 // Emit type information for external functions
573 typedef X86COFFMachineModuleInfo::externals_iterator externals_iterator;
574 for (externals_iterator I = COFFMMI.externals_begin(),
575 E = COFFMMI.externals_end();
577 OutStreamer.BeginCOFFSymbolDef(CurrentFnSym);
578 OutStreamer.EmitCOFFSymbolStorageClass(COFF::C_EXT);
579 OutStreamer.EmitCOFFSymbolType(COFF::DT_FCN << COFF::N_BTSHFT);
580 OutStreamer.EndCOFFSymbolDef();
583 if (Subtarget->isTargetCygMing()) {
584 // Necessary for dllexport support
585 std::vector<const MCSymbol*> DLLExportedFns, DLLExportedGlobals;
587 const TargetLoweringObjectFileCOFF &TLOFCOFF =
588 static_cast<const TargetLoweringObjectFileCOFF&>(getObjFileLowering());
590 for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I)
591 if (I->hasDLLExportLinkage())
592 DLLExportedFns.push_back(Mang->getSymbol(I));
594 for (Module::const_global_iterator I = M.global_begin(),
595 E = M.global_end(); I != E; ++I)
596 if (I->hasDLLExportLinkage())
597 DLLExportedGlobals.push_back(Mang->getSymbol(I));
599 // Output linker support code for dllexported globals on windows.
600 if (!DLLExportedGlobals.empty() || !DLLExportedFns.empty()) {
601 OutStreamer.SwitchSection(TLOFCOFF.getDrectveSection());
602 for (unsigned i = 0, e = DLLExportedGlobals.size(); i != e; ++i)
603 OutStreamer.EmitRawText("\t.ascii \" -export:" +
604 Twine(DLLExportedGlobals[i]->getName()) +
607 for (unsigned i = 0, e = DLLExportedFns.size(); i != e; ++i)
608 OutStreamer.EmitRawText("\t.ascii \" -export:" +
609 Twine(DLLExportedFns[i]->getName()) + "\"");
614 if (Subtarget->isTargetELF()) {
615 const TargetLoweringObjectFileELF &TLOFELF =
616 static_cast<const TargetLoweringObjectFileELF &>(getObjFileLowering());
618 MachineModuleInfoELF &MMIELF = MMI->getObjFileInfo<MachineModuleInfoELF>();
620 // Output stubs for external and common global variables.
621 MachineModuleInfoELF::SymbolListTy Stubs = MMIELF.GetGVStubList();
622 if (!Stubs.empty()) {
623 OutStreamer.SwitchSection(TLOFELF.getDataRelSection());
624 const TargetData *TD = TM.getTargetData();
626 for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
627 OutStreamer.EmitLabel(Stubs[i].first);
628 OutStreamer.EmitSymbolValue(Stubs[i].second.getPointer(),
629 TD->getPointerSize(), 0);
637 //===----------------------------------------------------------------------===//
638 // Target Registry Stuff
639 //===----------------------------------------------------------------------===//
641 static MCInstPrinter *createX86MCInstPrinter(const Target &T,
642 unsigned SyntaxVariant,
643 const MCAsmInfo &MAI) {
644 if (SyntaxVariant == 0)
645 return new X86ATTInstPrinter(MAI);
646 if (SyntaxVariant == 1)
647 return new X86IntelInstPrinter(MAI);
651 // Force static initialization.
652 extern "C" void LLVMInitializeX86AsmPrinter() {
653 RegisterAsmPrinter<X86AsmPrinter> X(TheX86_32Target);
654 RegisterAsmPrinter<X86AsmPrinter> Y(TheX86_64Target);
656 TargetRegistry::RegisterMCInstPrinter(TheX86_32Target,createX86MCInstPrinter);
657 TargetRegistry::RegisterMCInstPrinter(TheX86_64Target,createX86MCInstPrinter);