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 "X86MCInstLower.h"
18 #include "X86COFFMachineModuleInfo.h"
19 #include "X86MachineFunctionInfo.h"
20 #include "X86TargetMachine.h"
21 #include "InstPrinter/X86ATTInstPrinter.h"
22 #include "llvm/CallingConv.h"
23 #include "llvm/DerivedTypes.h"
24 #include "llvm/Module.h"
25 #include "llvm/Type.h"
26 #include "llvm/Analysis/DebugInfo.h"
27 #include "llvm/Assembly/Writer.h"
28 #include "llvm/MC/MCAsmInfo.h"
29 #include "llvm/MC/MCContext.h"
30 #include "llvm/MC/MCExpr.h"
31 #include "llvm/MC/MCSectionMachO.h"
32 #include "llvm/MC/MCStreamer.h"
33 #include "llvm/MC/MCSymbol.h"
34 #include "llvm/CodeGen/MachineJumpTableInfo.h"
35 #include "llvm/CodeGen/MachineModuleInfoImpls.h"
36 #include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
37 #include "llvm/Target/Mangler.h"
38 #include "llvm/Target/TargetOptions.h"
39 #include "llvm/Support/COFF.h"
40 #include "llvm/Support/Debug.h"
41 #include "llvm/Support/ErrorHandling.h"
42 #include "llvm/Support/TargetRegistry.h"
43 #include "llvm/ADT/SmallString.h"
46 //===----------------------------------------------------------------------===//
47 // Primitive Helper Functions.
48 //===----------------------------------------------------------------------===//
50 /// runOnMachineFunction - Emit the function body.
52 bool X86AsmPrinter::runOnMachineFunction(MachineFunction &MF) {
53 SetupMachineFunction(MF);
55 if (Subtarget->isTargetCOFF() && !Subtarget->isTargetEnvMacho()) {
56 bool Intrn = MF.getFunction()->hasInternalLinkage();
57 OutStreamer.BeginCOFFSymbolDef(CurrentFnSym);
58 OutStreamer.EmitCOFFSymbolStorageClass(Intrn ? COFF::IMAGE_SYM_CLASS_STATIC
59 : COFF::IMAGE_SYM_CLASS_EXTERNAL);
60 OutStreamer.EmitCOFFSymbolType(COFF::IMAGE_SYM_DTYPE_FUNCTION
61 << COFF::SCT_COMPLEX_TYPE_SHIFT);
62 OutStreamer.EndCOFFSymbolDef();
65 // Have common code print out the function header with linkage info etc.
68 // Emit the rest of the function body.
71 // We didn't modify anything.
75 /// printSymbolOperand - Print a raw symbol reference operand. This handles
76 /// jump tables, constant pools, global address and external symbols, all of
77 /// which print to a label with various suffixes for relocation types etc.
78 void X86AsmPrinter::printSymbolOperand(const MachineOperand &MO,
80 switch (MO.getType()) {
81 default: llvm_unreachable("unknown symbol type!");
82 case MachineOperand::MO_JumpTableIndex:
83 O << *GetJTISymbol(MO.getIndex());
85 case MachineOperand::MO_ConstantPoolIndex:
86 O << *GetCPISymbol(MO.getIndex());
87 printOffset(MO.getOffset(), O);
89 case MachineOperand::MO_GlobalAddress: {
90 const GlobalValue *GV = MO.getGlobal();
93 if (MO.getTargetFlags() == X86II::MO_DARWIN_STUB)
94 GVSym = GetSymbolWithGlobalValueBase(GV, "$stub");
95 else if (MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY ||
96 MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY_PIC_BASE ||
97 MO.getTargetFlags() == X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE)
98 GVSym = GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
100 GVSym = Mang->getSymbol(GV);
102 // Handle dllimport linkage.
103 if (MO.getTargetFlags() == X86II::MO_DLLIMPORT)
104 GVSym = OutContext.GetOrCreateSymbol(Twine("__imp_") + GVSym->getName());
106 if (MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY ||
107 MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY_PIC_BASE) {
108 MCSymbol *Sym = GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
109 MachineModuleInfoImpl::StubValueTy &StubSym =
110 MMI->getObjFileInfo<MachineModuleInfoMachO>().getGVStubEntry(Sym);
111 if (StubSym.getPointer() == 0)
112 StubSym = MachineModuleInfoImpl::
113 StubValueTy(Mang->getSymbol(GV), !GV->hasInternalLinkage());
114 } else if (MO.getTargetFlags() == X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE){
115 MCSymbol *Sym = GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
116 MachineModuleInfoImpl::StubValueTy &StubSym =
117 MMI->getObjFileInfo<MachineModuleInfoMachO>().getHiddenGVStubEntry(Sym);
118 if (StubSym.getPointer() == 0)
119 StubSym = MachineModuleInfoImpl::
120 StubValueTy(Mang->getSymbol(GV), !GV->hasInternalLinkage());
121 } else if (MO.getTargetFlags() == X86II::MO_DARWIN_STUB) {
122 MCSymbol *Sym = GetSymbolWithGlobalValueBase(GV, "$stub");
123 MachineModuleInfoImpl::StubValueTy &StubSym =
124 MMI->getObjFileInfo<MachineModuleInfoMachO>().getFnStubEntry(Sym);
125 if (StubSym.getPointer() == 0)
126 StubSym = MachineModuleInfoImpl::
127 StubValueTy(Mang->getSymbol(GV), !GV->hasInternalLinkage());
130 // If the name begins with a dollar-sign, enclose it in parens. We do this
131 // to avoid having it look like an integer immediate to the assembler.
132 if (GVSym->getName()[0] != '$')
135 O << '(' << *GVSym << ')';
136 printOffset(MO.getOffset(), O);
139 case MachineOperand::MO_ExternalSymbol: {
140 const MCSymbol *SymToPrint;
141 if (MO.getTargetFlags() == X86II::MO_DARWIN_STUB) {
142 SmallString<128> TempNameStr;
143 TempNameStr += StringRef(MO.getSymbolName());
144 TempNameStr += StringRef("$stub");
146 MCSymbol *Sym = GetExternalSymbolSymbol(TempNameStr.str());
147 MachineModuleInfoImpl::StubValueTy &StubSym =
148 MMI->getObjFileInfo<MachineModuleInfoMachO>().getFnStubEntry(Sym);
149 if (StubSym.getPointer() == 0) {
150 TempNameStr.erase(TempNameStr.end()-5, TempNameStr.end());
151 StubSym = MachineModuleInfoImpl::
152 StubValueTy(OutContext.GetOrCreateSymbol(TempNameStr.str()),
155 SymToPrint = StubSym.getPointer();
157 SymToPrint = GetExternalSymbolSymbol(MO.getSymbolName());
160 // If the name begins with a dollar-sign, enclose it in parens. We do this
161 // to avoid having it look like an integer immediate to the assembler.
162 if (SymToPrint->getName()[0] != '$')
165 O << '(' << *SymToPrint << '(';
170 switch (MO.getTargetFlags()) {
172 llvm_unreachable("Unknown target flag on GV operand");
173 case X86II::MO_NO_FLAG: // No flag.
175 case X86II::MO_DARWIN_NONLAZY:
176 case X86II::MO_DLLIMPORT:
177 case X86II::MO_DARWIN_STUB:
178 // These affect the name of the symbol, not any suffix.
180 case X86II::MO_GOT_ABSOLUTE_ADDRESS:
181 O << " + [.-" << *MF->getPICBaseSymbol() << ']';
183 case X86II::MO_PIC_BASE_OFFSET:
184 case X86II::MO_DARWIN_NONLAZY_PIC_BASE:
185 case X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE:
186 O << '-' << *MF->getPICBaseSymbol();
188 case X86II::MO_TLSGD: O << "@TLSGD"; break;
189 case X86II::MO_TLSLD: O << "@TLSLD"; break;
190 case X86II::MO_TLSLDM: O << "@TLSLDM"; break;
191 case X86II::MO_GOTTPOFF: O << "@GOTTPOFF"; break;
192 case X86II::MO_INDNTPOFF: O << "@INDNTPOFF"; break;
193 case X86II::MO_TPOFF: O << "@TPOFF"; break;
194 case X86II::MO_DTPOFF: O << "@DTPOFF"; break;
195 case X86II::MO_NTPOFF: O << "@NTPOFF"; break;
196 case X86II::MO_GOTNTPOFF: O << "@GOTNTPOFF"; break;
197 case X86II::MO_GOTPCREL: O << "@GOTPCREL"; break;
198 case X86II::MO_GOT: O << "@GOT"; break;
199 case X86II::MO_GOTOFF: O << "@GOTOFF"; break;
200 case X86II::MO_PLT: O << "@PLT"; break;
201 case X86II::MO_TLVP: O << "@TLVP"; break;
202 case X86II::MO_TLVP_PIC_BASE:
203 O << "@TLVP" << '-' << *MF->getPICBaseSymbol();
205 case X86II::MO_SECREL: O << "@SECREL"; break;
209 /// print_pcrel_imm - This is used to print an immediate value that ends up
210 /// being encoded as a pc-relative value. These print slightly differently, for
211 /// example, a $ is not emitted.
212 void X86AsmPrinter::print_pcrel_imm(const MachineInstr *MI, unsigned OpNo,
214 const MachineOperand &MO = MI->getOperand(OpNo);
215 switch (MO.getType()) {
216 default: llvm_unreachable("Unknown pcrel immediate operand");
217 case MachineOperand::MO_Register:
218 // pc-relativeness was handled when computing the value in the reg.
219 printOperand(MI, OpNo, O);
221 case MachineOperand::MO_Immediate:
224 case MachineOperand::MO_MachineBasicBlock:
225 O << *MO.getMBB()->getSymbol();
227 case MachineOperand::MO_GlobalAddress:
228 case MachineOperand::MO_ExternalSymbol:
229 printSymbolOperand(MO, O);
235 void X86AsmPrinter::printOperand(const MachineInstr *MI, unsigned OpNo,
236 raw_ostream &O, const char *Modifier) {
237 const MachineOperand &MO = MI->getOperand(OpNo);
238 switch (MO.getType()) {
239 default: llvm_unreachable("unknown operand type!");
240 case MachineOperand::MO_Register: {
242 unsigned Reg = MO.getReg();
243 if (Modifier && strncmp(Modifier, "subreg", strlen("subreg")) == 0) {
244 EVT VT = (strcmp(Modifier+6,"64") == 0) ?
245 MVT::i64 : ((strcmp(Modifier+6, "32") == 0) ? MVT::i32 :
246 ((strcmp(Modifier+6,"16") == 0) ? MVT::i16 : MVT::i8));
247 Reg = getX86SubSuperRegister(Reg, VT);
249 O << X86ATTInstPrinter::getRegisterName(Reg);
253 case MachineOperand::MO_Immediate:
254 O << '$' << MO.getImm();
257 case MachineOperand::MO_JumpTableIndex:
258 case MachineOperand::MO_ConstantPoolIndex:
259 case MachineOperand::MO_GlobalAddress:
260 case MachineOperand::MO_ExternalSymbol: {
262 printSymbolOperand(MO, O);
268 void X86AsmPrinter::printSSECC(const MachineInstr *MI, unsigned Op,
270 unsigned char value = MI->getOperand(Op).getImm();
272 default: llvm_unreachable("Invalid ssecc argument!");
273 case 0: O << "eq"; break;
274 case 1: O << "lt"; break;
275 case 2: O << "le"; break;
276 case 3: O << "unord"; break;
277 case 4: O << "neq"; break;
278 case 5: O << "nlt"; break;
279 case 6: O << "nle"; break;
280 case 7: O << "ord"; break;
281 case 8: O << "eq_uq"; break;
282 case 9: O << "nge"; break;
283 case 0xa: O << "ngt"; break;
284 case 0xb: O << "false"; break;
285 case 0xc: O << "neq_oq"; break;
286 case 0xd: O << "ge"; break;
287 case 0xe: O << "gt"; break;
288 case 0xf: O << "true"; break;
289 case 0x10: O << "eq_os"; break;
290 case 0x11: O << "lt_oq"; break;
291 case 0x12: O << "le_oq"; break;
292 case 0x13: O << "unord_s"; break;
293 case 0x14: O << "neq_us"; break;
294 case 0x15: O << "nlt_uq"; break;
295 case 0x16: O << "nle_uq"; break;
296 case 0x17: O << "ord_s"; break;
297 case 0x18: O << "eq_us"; break;
298 case 0x19: O << "nge_uq"; break;
299 case 0x1a: O << "ngt_uq"; break;
300 case 0x1b: O << "false_os"; break;
301 case 0x1c: O << "neq_os"; break;
302 case 0x1d: O << "ge_oq"; break;
303 case 0x1e: O << "gt_oq"; break;
304 case 0x1f: O << "true_us"; break;
308 void X86AsmPrinter::printLeaMemReference(const MachineInstr *MI, unsigned Op,
309 raw_ostream &O, const char *Modifier) {
310 const MachineOperand &BaseReg = MI->getOperand(Op);
311 const MachineOperand &IndexReg = MI->getOperand(Op+2);
312 const MachineOperand &DispSpec = MI->getOperand(Op+3);
314 // If we really don't want to print out (rip), don't.
315 bool HasBaseReg = BaseReg.getReg() != 0;
316 if (HasBaseReg && Modifier && !strcmp(Modifier, "no-rip") &&
317 BaseReg.getReg() == X86::RIP)
320 // HasParenPart - True if we will print out the () part of the mem ref.
321 bool HasParenPart = IndexReg.getReg() || HasBaseReg;
323 if (DispSpec.isImm()) {
324 int DispVal = DispSpec.getImm();
325 if (DispVal || !HasParenPart)
328 assert(DispSpec.isGlobal() || DispSpec.isCPI() ||
329 DispSpec.isJTI() || DispSpec.isSymbol());
330 printSymbolOperand(MI->getOperand(Op+3), O);
333 if (Modifier && strcmp(Modifier, "H") == 0)
337 assert(IndexReg.getReg() != X86::ESP &&
338 "X86 doesn't allow scaling by ESP");
342 printOperand(MI, Op, O, Modifier);
344 if (IndexReg.getReg()) {
346 printOperand(MI, Op+2, O, Modifier);
347 unsigned ScaleVal = MI->getOperand(Op+1).getImm();
349 O << ',' << ScaleVal;
355 void X86AsmPrinter::printMemReference(const MachineInstr *MI, unsigned Op,
356 raw_ostream &O, const char *Modifier) {
357 assert(isMem(MI, Op) && "Invalid memory reference!");
358 const MachineOperand &Segment = MI->getOperand(Op+4);
359 if (Segment.getReg()) {
360 printOperand(MI, Op+4, O, Modifier);
363 printLeaMemReference(MI, Op, O, Modifier);
366 void X86AsmPrinter::printPICLabel(const MachineInstr *MI, unsigned Op,
368 O << *MF->getPICBaseSymbol() << '\n';
369 O << *MF->getPICBaseSymbol() << ':';
372 bool X86AsmPrinter::printAsmMRegister(const MachineOperand &MO, char Mode,
374 unsigned Reg = MO.getReg();
376 default: return true; // Unknown mode.
377 case 'b': // Print QImode register
378 Reg = getX86SubSuperRegister(Reg, MVT::i8);
380 case 'h': // Print QImode high register
381 Reg = getX86SubSuperRegister(Reg, MVT::i8, true);
383 case 'w': // Print HImode register
384 Reg = getX86SubSuperRegister(Reg, MVT::i16);
386 case 'k': // Print SImode register
387 Reg = getX86SubSuperRegister(Reg, MVT::i32);
389 case 'q': // Print DImode register
390 Reg = getX86SubSuperRegister(Reg, MVT::i64);
394 O << '%' << X86ATTInstPrinter::getRegisterName(Reg);
398 /// PrintAsmOperand - Print out an operand for an inline asm expression.
400 bool X86AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
402 const char *ExtraCode, raw_ostream &O) {
403 // Does this asm operand have a single letter operand modifier?
404 if (ExtraCode && ExtraCode[0]) {
405 if (ExtraCode[1] != 0) return true; // Unknown modifier.
407 const MachineOperand &MO = MI->getOperand(OpNo);
409 switch (ExtraCode[0]) {
410 default: return true; // Unknown modifier.
411 case 'a': // This is an address. Currently only 'i' and 'r' are expected.
416 if (MO.isGlobal() || MO.isCPI() || MO.isJTI() || MO.isSymbol()) {
417 printSymbolOperand(MO, O);
418 if (Subtarget->isPICStyleRIPRel())
424 printOperand(MI, OpNo, O);
430 case 'c': // Don't print "$" before a global var name or constant.
433 else if (MO.isGlobal() || MO.isCPI() || MO.isJTI() || MO.isSymbol())
434 printSymbolOperand(MO, O);
436 printOperand(MI, OpNo, O);
439 case 'A': // Print '*' before a register (it must be a register)
442 printOperand(MI, OpNo, O);
447 case 'b': // Print QImode register
448 case 'h': // Print QImode high register
449 case 'w': // Print HImode register
450 case 'k': // Print SImode register
451 case 'q': // Print DImode register
453 return printAsmMRegister(MO, ExtraCode[0], O);
454 printOperand(MI, OpNo, O);
457 case 'P': // This is the operand of a call, treat specially.
458 print_pcrel_imm(MI, OpNo, O);
461 case 'n': // Negate the immediate or print a '-' before the operand.
462 // Note: this is a temporary solution. It should be handled target
463 // independently as part of the 'MC' work.
472 printOperand(MI, OpNo, O);
476 bool X86AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
477 unsigned OpNo, unsigned AsmVariant,
478 const char *ExtraCode,
480 if (ExtraCode && ExtraCode[0]) {
481 if (ExtraCode[1] != 0) return true; // Unknown modifier.
483 switch (ExtraCode[0]) {
484 default: return true; // Unknown modifier.
485 case 'b': // Print QImode register
486 case 'h': // Print QImode high register
487 case 'w': // Print HImode register
488 case 'k': // Print SImode register
489 case 'q': // Print SImode register
490 // These only apply to registers, ignore on mem.
493 printMemReference(MI, OpNo, O, "H");
495 case 'P': // Don't print @PLT, but do print as memory.
496 printMemReference(MI, OpNo, O, "no-rip");
500 printMemReference(MI, OpNo, O);
504 void X86AsmPrinter::EmitStartOfAsmFile(Module &M) {
505 if (Subtarget->isTargetEnvMacho())
506 OutStreamer.SwitchSection(getObjFileLowering().getTextSection());
510 void X86AsmPrinter::EmitEndOfAsmFile(Module &M) {
511 if (Subtarget->isTargetEnvMacho()) {
512 // All darwin targets use mach-o.
513 MachineModuleInfoMachO &MMIMacho =
514 MMI->getObjFileInfo<MachineModuleInfoMachO>();
516 // Output stubs for dynamically-linked functions.
517 MachineModuleInfoMachO::SymbolListTy Stubs;
519 Stubs = MMIMacho.GetFnStubList();
520 if (!Stubs.empty()) {
521 const MCSection *TheSection =
522 OutContext.getMachOSection("__IMPORT", "__jump_table",
523 MCSectionMachO::S_SYMBOL_STUBS |
524 MCSectionMachO::S_ATTR_SELF_MODIFYING_CODE |
525 MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
526 5, SectionKind::getMetadata());
527 OutStreamer.SwitchSection(TheSection);
529 for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
531 OutStreamer.EmitLabel(Stubs[i].first);
532 // .indirect_symbol _foo
533 OutStreamer.EmitSymbolAttribute(Stubs[i].second.getPointer(),
534 MCSA_IndirectSymbol);
535 // hlt; hlt; hlt; hlt; hlt hlt = 0xf4.
536 const char HltInsts[] = "\xf4\xf4\xf4\xf4\xf4";
537 OutStreamer.EmitBytes(StringRef(HltInsts, 5), 0/*addrspace*/);
541 OutStreamer.AddBlankLine();
544 // Output stubs for external and common global variables.
545 Stubs = MMIMacho.GetGVStubList();
546 if (!Stubs.empty()) {
547 const MCSection *TheSection =
548 OutContext.getMachOSection("__IMPORT", "__pointers",
549 MCSectionMachO::S_NON_LAZY_SYMBOL_POINTERS,
550 SectionKind::getMetadata());
551 OutStreamer.SwitchSection(TheSection);
553 for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
554 // L_foo$non_lazy_ptr:
555 OutStreamer.EmitLabel(Stubs[i].first);
556 // .indirect_symbol _foo
557 MachineModuleInfoImpl::StubValueTy &MCSym = Stubs[i].second;
558 OutStreamer.EmitSymbolAttribute(MCSym.getPointer(),
559 MCSA_IndirectSymbol);
562 // External to current translation unit.
563 OutStreamer.EmitIntValue(0, 4/*size*/, 0/*addrspace*/);
565 // Internal to current translation unit.
567 // When we place the LSDA into the TEXT section, the type info
568 // pointers need to be indirect and pc-rel. We accomplish this by
569 // using NLPs. However, sometimes the types are local to the file. So
570 // we need to fill in the value for the NLP in those cases.
571 OutStreamer.EmitValue(MCSymbolRefExpr::Create(MCSym.getPointer(),
573 4/*size*/, 0/*addrspace*/);
576 OutStreamer.AddBlankLine();
579 Stubs = MMIMacho.GetHiddenGVStubList();
580 if (!Stubs.empty()) {
581 OutStreamer.SwitchSection(getObjFileLowering().getDataSection());
584 for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
585 // L_foo$non_lazy_ptr:
586 OutStreamer.EmitLabel(Stubs[i].first);
588 OutStreamer.EmitValue(MCSymbolRefExpr::
589 Create(Stubs[i].second.getPointer(),
591 4/*size*/, 0/*addrspace*/);
594 OutStreamer.AddBlankLine();
597 // Funny Darwin hack: This flag tells the linker that no global symbols
598 // contain code that falls through to other global symbols (e.g. the obvious
599 // implementation of multiple entry points). If this doesn't occur, the
600 // linker can safely perform dead code stripping. Since LLVM never
601 // generates code that does this, it is always safe to set.
602 OutStreamer.EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
605 if (Subtarget->isTargetWindows() && !Subtarget->isTargetCygMing() &&
606 MMI->usesVAFloatArgument()) {
607 StringRef SymbolName = Subtarget->is64Bit() ? "_fltused" : "__fltused";
608 MCSymbol *S = MMI->getContext().GetOrCreateSymbol(SymbolName);
609 OutStreamer.EmitSymbolAttribute(S, MCSA_Global);
612 if (Subtarget->isTargetCOFF() && !Subtarget->isTargetEnvMacho()) {
613 X86COFFMachineModuleInfo &COFFMMI =
614 MMI->getObjFileInfo<X86COFFMachineModuleInfo>();
616 // Emit type information for external functions
617 typedef X86COFFMachineModuleInfo::externals_iterator externals_iterator;
618 for (externals_iterator I = COFFMMI.externals_begin(),
619 E = COFFMMI.externals_end();
621 OutStreamer.BeginCOFFSymbolDef(CurrentFnSym);
622 OutStreamer.EmitCOFFSymbolStorageClass(COFF::IMAGE_SYM_CLASS_EXTERNAL);
623 OutStreamer.EmitCOFFSymbolType(COFF::IMAGE_SYM_DTYPE_FUNCTION
624 << COFF::SCT_COMPLEX_TYPE_SHIFT);
625 OutStreamer.EndCOFFSymbolDef();
628 // Necessary for dllexport support
629 std::vector<const MCSymbol*> DLLExportedFns, DLLExportedGlobals;
631 const TargetLoweringObjectFileCOFF &TLOFCOFF =
632 static_cast<const TargetLoweringObjectFileCOFF&>(getObjFileLowering());
634 for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I)
635 if (I->hasDLLExportLinkage())
636 DLLExportedFns.push_back(Mang->getSymbol(I));
638 for (Module::const_global_iterator I = M.global_begin(),
639 E = M.global_end(); I != E; ++I)
640 if (I->hasDLLExportLinkage())
641 DLLExportedGlobals.push_back(Mang->getSymbol(I));
643 // Output linker support code for dllexported globals on windows.
644 if (!DLLExportedGlobals.empty() || !DLLExportedFns.empty()) {
645 OutStreamer.SwitchSection(TLOFCOFF.getDrectveSection());
646 SmallString<128> name;
647 for (unsigned i = 0, e = DLLExportedGlobals.size(); i != e; ++i) {
648 if (Subtarget->isTargetWindows())
652 name += DLLExportedGlobals[i]->getName();
653 if (Subtarget->isTargetWindows())
657 OutStreamer.EmitBytes(name, 0);
660 for (unsigned i = 0, e = DLLExportedFns.size(); i != e; ++i) {
661 if (Subtarget->isTargetWindows())
665 name += DLLExportedFns[i]->getName();
666 OutStreamer.EmitBytes(name, 0);
671 if (Subtarget->isTargetELF()) {
672 const TargetLoweringObjectFileELF &TLOFELF =
673 static_cast<const TargetLoweringObjectFileELF &>(getObjFileLowering());
675 MachineModuleInfoELF &MMIELF = MMI->getObjFileInfo<MachineModuleInfoELF>();
677 // Output stubs for external and common global variables.
678 MachineModuleInfoELF::SymbolListTy Stubs = MMIELF.GetGVStubList();
679 if (!Stubs.empty()) {
680 OutStreamer.SwitchSection(TLOFELF.getDataRelSection());
681 const TargetData *TD = TM.getTargetData();
683 for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
684 OutStreamer.EmitLabel(Stubs[i].first);
685 OutStreamer.EmitSymbolValue(Stubs[i].second.getPointer(),
686 TD->getPointerSize(), 0);
694 X86AsmPrinter::getDebugValueLocation(const MachineInstr *MI) const {
695 MachineLocation Location;
696 assert (MI->getNumOperands() == 7 && "Invalid no. of machine operands!");
697 // Frame address. Currently handles register +- offset only.
699 if (MI->getOperand(0).isReg() && MI->getOperand(3).isImm())
700 Location.set(MI->getOperand(0).getReg(), MI->getOperand(3).getImm());
702 DEBUG(dbgs() << "DBG_VALUE instruction ignored! " << *MI << "\n");
707 void X86AsmPrinter::PrintDebugValueComment(const MachineInstr *MI,
709 // Only the target-dependent form of DBG_VALUE should get here.
710 // Referencing the offset and metadata as NOps-2 and NOps-1 is
711 // probably portable to other targets; frame pointer location is not.
712 unsigned NOps = MI->getNumOperands();
714 O << '\t' << MAI->getCommentString() << "DEBUG_VALUE: ";
715 // cast away const; DIetc do not take const operands for some reason.
716 DIVariable V(const_cast<MDNode *>(MI->getOperand(NOps-1).getMetadata()));
717 if (V.getContext().isSubprogram())
718 O << DISubprogram(V.getContext()).getDisplayName() << ":";
721 // Frame address. Currently handles register +- offset only.
723 if (MI->getOperand(0).isReg() && MI->getOperand(0).getReg())
724 printOperand(MI, 0, O);
727 O << '+'; printOperand(MI, 3, O);
730 printOperand(MI, NOps-2, O);
735 //===----------------------------------------------------------------------===//
736 // Target Registry Stuff
737 //===----------------------------------------------------------------------===//
739 // Force static initialization.
740 extern "C" void LLVMInitializeX86AsmPrinter() {
741 RegisterAsmPrinter<X86AsmPrinter> X(TheX86_32Target);
742 RegisterAsmPrinter<X86AsmPrinter> Y(TheX86_64Target);