//===-- X86AsmPrinter.cpp - Convert X86 LLVM code to AT&T assembly --------===// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // // This file contains a printer that converts from our internal representation // of machine-dependent LLVM code to X86 machine code. // //===----------------------------------------------------------------------===// #include "X86AsmPrinter.h" #include "InstPrinter/X86ATTInstPrinter.h" #include "InstPrinter/X86IntelInstPrinter.h" #include "X86MCInstLower.h" #include "X86.h" #include "X86COFFMachineModuleInfo.h" #include "X86MachineFunctionInfo.h" #include "X86TargetMachine.h" #include "llvm/CallingConv.h" #include "llvm/DerivedTypes.h" #include "llvm/Module.h" #include "llvm/Type.h" #include "llvm/Analysis/DebugInfo.h" #include "llvm/Assembly/Writer.h" #include "llvm/MC/MCAsmInfo.h" #include "llvm/MC/MCContext.h" #include "llvm/MC/MCExpr.h" #include "llvm/MC/MCSectionMachO.h" #include "llvm/MC/MCStreamer.h" #include "llvm/MC/MCSymbol.h" #include "llvm/CodeGen/MachineJumpTableInfo.h" #include "llvm/CodeGen/MachineModuleInfoImpls.h" #include "llvm/CodeGen/TargetLoweringObjectFileImpl.h" #include "llvm/Support/COFF.h" #include "llvm/Support/Debug.h" #include "llvm/Support/ErrorHandling.h" #include "llvm/Target/Mangler.h" #include "llvm/Target/TargetOptions.h" #include "llvm/Target/TargetRegistry.h" #include "llvm/ADT/SmallString.h" using namespace llvm; //===----------------------------------------------------------------------===// // Primitive Helper Functions. //===----------------------------------------------------------------------===// /// runOnMachineFunction - Emit the function body. /// bool X86AsmPrinter::runOnMachineFunction(MachineFunction &MF) { SetupMachineFunction(MF); if (Subtarget->isTargetCOFF()) { bool Intrn = MF.getFunction()->hasInternalLinkage(); OutStreamer.BeginCOFFSymbolDef(CurrentFnSym); OutStreamer.EmitCOFFSymbolStorageClass(Intrn ? COFF::IMAGE_SYM_CLASS_STATIC : COFF::IMAGE_SYM_CLASS_EXTERNAL); OutStreamer.EmitCOFFSymbolType(COFF::IMAGE_SYM_DTYPE_FUNCTION << COFF::SCT_COMPLEX_TYPE_SHIFT); OutStreamer.EndCOFFSymbolDef(); } // Have common code print out the function header with linkage info etc. EmitFunctionHeader(); // Emit the rest of the function body. EmitFunctionBody(); // We didn't modify anything. return false; } /// printSymbolOperand - Print a raw symbol reference operand. This handles /// jump tables, constant pools, global address and external symbols, all of /// which print to a label with various suffixes for relocation types etc. void X86AsmPrinter::printSymbolOperand(const MachineOperand &MO, raw_ostream &O) { switch (MO.getType()) { default: llvm_unreachable("unknown symbol type!"); case MachineOperand::MO_JumpTableIndex: O << *GetJTISymbol(MO.getIndex()); break; case MachineOperand::MO_ConstantPoolIndex: O << *GetCPISymbol(MO.getIndex()); printOffset(MO.getOffset(), O); break; case MachineOperand::MO_GlobalAddress: { const GlobalValue *GV = MO.getGlobal(); MCSymbol *GVSym; if (MO.getTargetFlags() == X86II::MO_DARWIN_STUB) GVSym = GetSymbolWithGlobalValueBase(GV, "$stub"); else if (MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY || MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY_PIC_BASE || MO.getTargetFlags() == X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE) GVSym = GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr"); else GVSym = Mang->getSymbol(GV); // Handle dllimport linkage. if (MO.getTargetFlags() == X86II::MO_DLLIMPORT) GVSym = OutContext.GetOrCreateSymbol(Twine("__imp_") + GVSym->getName()); if (MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY || MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY_PIC_BASE) { MCSymbol *Sym = GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr"); MachineModuleInfoImpl::StubValueTy &StubSym = MMI->getObjFileInfo().getGVStubEntry(Sym); if (StubSym.getPointer() == 0) StubSym = MachineModuleInfoImpl:: StubValueTy(Mang->getSymbol(GV), !GV->hasInternalLinkage()); } else if (MO.getTargetFlags() == X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE){ MCSymbol *Sym = GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr"); MachineModuleInfoImpl::StubValueTy &StubSym = MMI->getObjFileInfo().getHiddenGVStubEntry(Sym); if (StubSym.getPointer() == 0) StubSym = MachineModuleInfoImpl:: StubValueTy(Mang->getSymbol(GV), !GV->hasInternalLinkage()); } else if (MO.getTargetFlags() == X86II::MO_DARWIN_STUB) { MCSymbol *Sym = GetSymbolWithGlobalValueBase(GV, "$stub"); MachineModuleInfoImpl::StubValueTy &StubSym = MMI->getObjFileInfo().getFnStubEntry(Sym); if (StubSym.getPointer() == 0) StubSym = MachineModuleInfoImpl:: StubValueTy(Mang->getSymbol(GV), !GV->hasInternalLinkage()); } // If the name begins with a dollar-sign, enclose it in parens. We do this // to avoid having it look like an integer immediate to the assembler. if (GVSym->getName()[0] != '$') O << *GVSym; else O << '(' << *GVSym << ')'; printOffset(MO.getOffset(), O); break; } case MachineOperand::MO_ExternalSymbol: { const MCSymbol *SymToPrint; if (MO.getTargetFlags() == X86II::MO_DARWIN_STUB) { SmallString<128> TempNameStr; TempNameStr += StringRef(MO.getSymbolName()); TempNameStr += StringRef("$stub"); MCSymbol *Sym = GetExternalSymbolSymbol(TempNameStr.str()); MachineModuleInfoImpl::StubValueTy &StubSym = MMI->getObjFileInfo().getFnStubEntry(Sym); if (StubSym.getPointer() == 0) { TempNameStr.erase(TempNameStr.end()-5, TempNameStr.end()); StubSym = MachineModuleInfoImpl:: StubValueTy(OutContext.GetOrCreateSymbol(TempNameStr.str()), true); } SymToPrint = StubSym.getPointer(); } else { SymToPrint = GetExternalSymbolSymbol(MO.getSymbolName()); } // If the name begins with a dollar-sign, enclose it in parens. We do this // to avoid having it look like an integer immediate to the assembler. if (SymToPrint->getName()[0] != '$') O << *SymToPrint; else O << '(' << *SymToPrint << '('; break; } } switch (MO.getTargetFlags()) { default: llvm_unreachable("Unknown target flag on GV operand"); case X86II::MO_NO_FLAG: // No flag. break; case X86II::MO_DARWIN_NONLAZY: case X86II::MO_DLLIMPORT: case X86II::MO_DARWIN_STUB: // These affect the name of the symbol, not any suffix. break; case X86II::MO_GOT_ABSOLUTE_ADDRESS: O << " + [.-" << *MF->getPICBaseSymbol() << ']'; break; case X86II::MO_PIC_BASE_OFFSET: case X86II::MO_DARWIN_NONLAZY_PIC_BASE: case X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE: O << '-' << *MF->getPICBaseSymbol(); break; case X86II::MO_TLSGD: O << "@TLSGD"; break; case X86II::MO_GOTTPOFF: O << "@GOTTPOFF"; break; case X86II::MO_INDNTPOFF: O << "@INDNTPOFF"; break; case X86II::MO_TPOFF: O << "@TPOFF"; break; case X86II::MO_NTPOFF: O << "@NTPOFF"; break; case X86II::MO_GOTPCREL: O << "@GOTPCREL"; break; case X86II::MO_GOT: O << "@GOT"; break; case X86II::MO_GOTOFF: O << "@GOTOFF"; break; case X86II::MO_PLT: O << "@PLT"; break; case X86II::MO_TLVP: O << "@TLVP"; break; case X86II::MO_TLVP_PIC_BASE: O << "@TLVP" << '-' << *MF->getPICBaseSymbol(); break; } } /// print_pcrel_imm - This is used to print an immediate value that ends up /// being encoded as a pc-relative value. These print slightly differently, for /// example, a $ is not emitted. void X86AsmPrinter::print_pcrel_imm(const MachineInstr *MI, unsigned OpNo, raw_ostream &O) { const MachineOperand &MO = MI->getOperand(OpNo); switch (MO.getType()) { default: llvm_unreachable("Unknown pcrel immediate operand"); case MachineOperand::MO_Register: // pc-relativeness was handled when computing the value in the reg. printOperand(MI, OpNo, O); return; case MachineOperand::MO_Immediate: O << MO.getImm(); return; case MachineOperand::MO_MachineBasicBlock: O << *MO.getMBB()->getSymbol(); return; case MachineOperand::MO_GlobalAddress: case MachineOperand::MO_ExternalSymbol: printSymbolOperand(MO, O); return; } } void X86AsmPrinter::printOperand(const MachineInstr *MI, unsigned OpNo, raw_ostream &O, const char *Modifier) { const MachineOperand &MO = MI->getOperand(OpNo); switch (MO.getType()) { default: llvm_unreachable("unknown operand type!"); case MachineOperand::MO_Register: { O << '%'; unsigned Reg = MO.getReg(); if (Modifier && strncmp(Modifier, "subreg", strlen("subreg")) == 0) { EVT VT = (strcmp(Modifier+6,"64") == 0) ? MVT::i64 : ((strcmp(Modifier+6, "32") == 0) ? MVT::i32 : ((strcmp(Modifier+6,"16") == 0) ? MVT::i16 : MVT::i8)); Reg = getX86SubSuperRegister(Reg, VT); } O << X86ATTInstPrinter::getRegisterName(Reg); return; } case MachineOperand::MO_Immediate: O << '$' << MO.getImm(); return; case MachineOperand::MO_JumpTableIndex: case MachineOperand::MO_ConstantPoolIndex: case MachineOperand::MO_GlobalAddress: case MachineOperand::MO_ExternalSymbol: { O << '$'; printSymbolOperand(MO, O); break; } } } void X86AsmPrinter::printSSECC(const MachineInstr *MI, unsigned Op, raw_ostream &O) { unsigned char value = MI->getOperand(Op).getImm(); assert(value <= 7 && "Invalid ssecc argument!"); switch (value) { case 0: O << "eq"; break; case 1: O << "lt"; break; case 2: O << "le"; break; case 3: O << "unord"; break; case 4: O << "neq"; break; case 5: O << "nlt"; break; case 6: O << "nle"; break; case 7: O << "ord"; break; } } void X86AsmPrinter::printLeaMemReference(const MachineInstr *MI, unsigned Op, raw_ostream &O, const char *Modifier) { const MachineOperand &BaseReg = MI->getOperand(Op); const MachineOperand &IndexReg = MI->getOperand(Op+2); const MachineOperand &DispSpec = MI->getOperand(Op+3); // If we really don't want to print out (rip), don't. bool HasBaseReg = BaseReg.getReg() != 0; if (HasBaseReg && Modifier && !strcmp(Modifier, "no-rip") && BaseReg.getReg() == X86::RIP) HasBaseReg = false; // HasParenPart - True if we will print out the () part of the mem ref. bool HasParenPart = IndexReg.getReg() || HasBaseReg; if (DispSpec.isImm()) { int DispVal = DispSpec.getImm(); if (DispVal || !HasParenPart) O << DispVal; } else { assert(DispSpec.isGlobal() || DispSpec.isCPI() || DispSpec.isJTI() || DispSpec.isSymbol()); printSymbolOperand(MI->getOperand(Op+3), O); } if (Modifier && strcmp(Modifier, "H") == 0) O << "+8"; if (HasParenPart) { assert(IndexReg.getReg() != X86::ESP && "X86 doesn't allow scaling by ESP"); O << '('; if (HasBaseReg) printOperand(MI, Op, O, Modifier); if (IndexReg.getReg()) { O << ','; printOperand(MI, Op+2, O, Modifier); unsigned ScaleVal = MI->getOperand(Op+1).getImm(); if (ScaleVal != 1) O << ',' << ScaleVal; } O << ')'; } } void X86AsmPrinter::printMemReference(const MachineInstr *MI, unsigned Op, raw_ostream &O, const char *Modifier) { assert(isMem(MI, Op) && "Invalid memory reference!"); const MachineOperand &Segment = MI->getOperand(Op+4); if (Segment.getReg()) { printOperand(MI, Op+4, O, Modifier); O << ':'; } printLeaMemReference(MI, Op, O, Modifier); } void X86AsmPrinter::printPICLabel(const MachineInstr *MI, unsigned Op, raw_ostream &O) { O << *MF->getPICBaseSymbol() << '\n'; O << *MF->getPICBaseSymbol() << ':'; } bool X86AsmPrinter::printAsmMRegister(const MachineOperand &MO, char Mode, raw_ostream &O) { unsigned Reg = MO.getReg(); switch (Mode) { default: return true; // Unknown mode. case 'b': // Print QImode register Reg = getX86SubSuperRegister(Reg, MVT::i8); break; case 'h': // Print QImode high register Reg = getX86SubSuperRegister(Reg, MVT::i8, true); break; case 'w': // Print HImode register Reg = getX86SubSuperRegister(Reg, MVT::i16); break; case 'k': // Print SImode register Reg = getX86SubSuperRegister(Reg, MVT::i32); break; case 'q': // Print DImode register Reg = getX86SubSuperRegister(Reg, MVT::i64); break; } O << '%' << X86ATTInstPrinter::getRegisterName(Reg); return false; } /// PrintAsmOperand - Print out an operand for an inline asm expression. /// bool X86AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo, unsigned AsmVariant, const char *ExtraCode, raw_ostream &O) { // Does this asm operand have a single letter operand modifier? if (ExtraCode && ExtraCode[0]) { if (ExtraCode[1] != 0) return true; // Unknown modifier. const MachineOperand &MO = MI->getOperand(OpNo); switch (ExtraCode[0]) { default: return true; // Unknown modifier. case 'a': // This is an address. Currently only 'i' and 'r' are expected. if (MO.isImm()) { O << MO.getImm(); return false; } if (MO.isGlobal() || MO.isCPI() || MO.isJTI() || MO.isSymbol()) { printSymbolOperand(MO, O); if (Subtarget->isPICStyleRIPRel()) O << "(%rip)"; return false; } if (MO.isReg()) { O << '('; printOperand(MI, OpNo, O); O << ')'; return false; } return true; case 'c': // Don't print "$" before a global var name or constant. if (MO.isImm()) O << MO.getImm(); else if (MO.isGlobal() || MO.isCPI() || MO.isJTI() || MO.isSymbol()) printSymbolOperand(MO, O); else printOperand(MI, OpNo, O); return false; case 'A': // Print '*' before a register (it must be a register) if (MO.isReg()) { O << '*'; printOperand(MI, OpNo, O); return false; } return true; case 'b': // Print QImode register case 'h': // Print QImode high register case 'w': // Print HImode register case 'k': // Print SImode register case 'q': // Print DImode register if (MO.isReg()) return printAsmMRegister(MO, ExtraCode[0], O); printOperand(MI, OpNo, O); return false; case 'P': // This is the operand of a call, treat specially. print_pcrel_imm(MI, OpNo, O); return false; case 'n': // Negate the immediate or print a '-' before the operand. // Note: this is a temporary solution. It should be handled target // independently as part of the 'MC' work. if (MO.isImm()) { O << -MO.getImm(); return false; } O << '-'; } } printOperand(MI, OpNo, O); return false; } bool X86AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo, unsigned AsmVariant, const char *ExtraCode, raw_ostream &O) { if (ExtraCode && ExtraCode[0]) { if (ExtraCode[1] != 0) return true; // Unknown modifier. switch (ExtraCode[0]) { default: return true; // Unknown modifier. case 'b': // Print QImode register case 'h': // Print QImode high register case 'w': // Print HImode register case 'k': // Print SImode register case 'q': // Print SImode register // These only apply to registers, ignore on mem. break; case 'H': printMemReference(MI, OpNo, O, "H"); return false; case 'P': // Don't print @PLT, but do print as memory. printMemReference(MI, OpNo, O, "no-rip"); return false; } } printMemReference(MI, OpNo, O); return false; } void X86AsmPrinter::EmitStartOfAsmFile(Module &M) { if (Subtarget->isTargetDarwin()) OutStreamer.SwitchSection(getObjFileLowering().getTextSection()); } void X86AsmPrinter::EmitEndOfAsmFile(Module &M) { if (Subtarget->isTargetDarwin()) { // All darwin targets use mach-o. MachineModuleInfoMachO &MMIMacho = MMI->getObjFileInfo(); // Output stubs for dynamically-linked functions. MachineModuleInfoMachO::SymbolListTy Stubs; Stubs = MMIMacho.GetFnStubList(); if (!Stubs.empty()) { const MCSection *TheSection = OutContext.getMachOSection("__IMPORT", "__jump_table", MCSectionMachO::S_SYMBOL_STUBS | MCSectionMachO::S_ATTR_SELF_MODIFYING_CODE | MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS, 5, SectionKind::getMetadata()); OutStreamer.SwitchSection(TheSection); for (unsigned i = 0, e = Stubs.size(); i != e; ++i) { // L_foo$stub: OutStreamer.EmitLabel(Stubs[i].first); // .indirect_symbol _foo OutStreamer.EmitSymbolAttribute(Stubs[i].second.getPointer(), MCSA_IndirectSymbol); // hlt; hlt; hlt; hlt; hlt hlt = 0xf4 = -12. const char HltInsts[] = { -12, -12, -12, -12, -12 }; OutStreamer.EmitBytes(StringRef(HltInsts, 5), 0/*addrspace*/); } Stubs.clear(); OutStreamer.AddBlankLine(); } // Output stubs for external and common global variables. Stubs = MMIMacho.GetGVStubList(); if (!Stubs.empty()) { const MCSection *TheSection = OutContext.getMachOSection("__IMPORT", "__pointers", MCSectionMachO::S_NON_LAZY_SYMBOL_POINTERS, SectionKind::getMetadata()); OutStreamer.SwitchSection(TheSection); for (unsigned i = 0, e = Stubs.size(); i != e; ++i) { // L_foo$non_lazy_ptr: OutStreamer.EmitLabel(Stubs[i].first); // .indirect_symbol _foo MachineModuleInfoImpl::StubValueTy &MCSym = Stubs[i].second; OutStreamer.EmitSymbolAttribute(MCSym.getPointer(), MCSA_IndirectSymbol); // .long 0 if (MCSym.getInt()) // External to current translation unit. OutStreamer.EmitIntValue(0, 4/*size*/, 0/*addrspace*/); else // Internal to current translation unit. // // When we place the LSDA into the TEXT section, the type info // pointers need to be indirect and pc-rel. We accomplish this by // using NLPs. However, sometimes the types are local to the file. So // we need to fill in the value for the NLP in those cases. OutStreamer.EmitValue(MCSymbolRefExpr::Create(MCSym.getPointer(), OutContext), 4/*size*/, 0/*addrspace*/); } Stubs.clear(); OutStreamer.AddBlankLine(); } Stubs = MMIMacho.GetHiddenGVStubList(); if (!Stubs.empty()) { OutStreamer.SwitchSection(getObjFileLowering().getDataSection()); EmitAlignment(2); for (unsigned i = 0, e = Stubs.size(); i != e; ++i) { // L_foo$non_lazy_ptr: OutStreamer.EmitLabel(Stubs[i].first); // .long _foo OutStreamer.EmitValue(MCSymbolRefExpr:: Create(Stubs[i].second.getPointer(), OutContext), 4/*size*/, 0/*addrspace*/); } Stubs.clear(); OutStreamer.AddBlankLine(); } // Funny Darwin hack: This flag tells the linker that no global symbols // contain code that falls through to other global symbols (e.g. the obvious // implementation of multiple entry points). If this doesn't occur, the // linker can safely perform dead code stripping. Since LLVM never // generates code that does this, it is always safe to set. OutStreamer.EmitAssemblerFlag(MCAF_SubsectionsViaSymbols); } if (Subtarget->isTargetWindows() && !Subtarget->isTargetCygMing() && MMI->callsExternalVAFunctionWithFloatingPointArguments()) { StringRef SymbolName = Subtarget->is64Bit() ? "_fltused" : "__fltused"; MCSymbol *S = MMI->getContext().GetOrCreateSymbol(SymbolName); OutStreamer.EmitSymbolAttribute(S, MCSA_Global); } if (Subtarget->isTargetCOFF()) { X86COFFMachineModuleInfo &COFFMMI = MMI->getObjFileInfo(); // Emit type information for external functions typedef X86COFFMachineModuleInfo::externals_iterator externals_iterator; for (externals_iterator I = COFFMMI.externals_begin(), E = COFFMMI.externals_end(); I != E; ++I) { OutStreamer.BeginCOFFSymbolDef(CurrentFnSym); OutStreamer.EmitCOFFSymbolStorageClass(COFF::IMAGE_SYM_CLASS_EXTERNAL); OutStreamer.EmitCOFFSymbolType(COFF::IMAGE_SYM_DTYPE_FUNCTION << COFF::SCT_COMPLEX_TYPE_SHIFT); OutStreamer.EndCOFFSymbolDef(); } // Necessary for dllexport support std::vector DLLExportedFns, DLLExportedGlobals; const TargetLoweringObjectFileCOFF &TLOFCOFF = static_cast(getObjFileLowering()); for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I) if (I->hasDLLExportLinkage()) DLLExportedFns.push_back(Mang->getSymbol(I)); for (Module::const_global_iterator I = M.global_begin(), E = M.global_end(); I != E; ++I) if (I->hasDLLExportLinkage()) DLLExportedGlobals.push_back(Mang->getSymbol(I)); // Output linker support code for dllexported globals on windows. if (!DLLExportedGlobals.empty() || !DLLExportedFns.empty()) { OutStreamer.SwitchSection(TLOFCOFF.getDrectveSection()); SmallString<128> name; for (unsigned i = 0, e = DLLExportedGlobals.size(); i != e; ++i) { if (Subtarget->isTargetWindows()) name = " /EXPORT:"; else name = " -export:"; name += DLLExportedGlobals[i]->getName(); if (Subtarget->isTargetWindows()) name += ",DATA"; else name += ",data"; OutStreamer.EmitBytes(name, 0); } for (unsigned i = 0, e = DLLExportedFns.size(); i != e; ++i) { if (Subtarget->isTargetWindows()) name = " /EXPORT:"; else name = " -export:"; name += DLLExportedFns[i]->getName(); OutStreamer.EmitBytes(name, 0); } } } if (Subtarget->isTargetELF()) { const TargetLoweringObjectFileELF &TLOFELF = static_cast(getObjFileLowering()); MachineModuleInfoELF &MMIELF = MMI->getObjFileInfo(); // Output stubs for external and common global variables. MachineModuleInfoELF::SymbolListTy Stubs = MMIELF.GetGVStubList(); if (!Stubs.empty()) { OutStreamer.SwitchSection(TLOFELF.getDataRelSection()); const TargetData *TD = TM.getTargetData(); for (unsigned i = 0, e = Stubs.size(); i != e; ++i) { OutStreamer.EmitLabel(Stubs[i].first); OutStreamer.EmitSymbolValue(Stubs[i].second.getPointer(), TD->getPointerSize(), 0); } Stubs.clear(); } } } MachineLocation X86AsmPrinter::getDebugValueLocation(const MachineInstr *MI) const { MachineLocation Location; assert (MI->getNumOperands() == 7 && "Invalid no. of machine operands!"); // Frame address. Currently handles register +- offset only. if (MI->getOperand(0).isReg() && MI->getOperand(3).isImm()) Location.set(MI->getOperand(0).getReg(), MI->getOperand(3).getImm()); else { DEBUG(dbgs() << "DBG_VALUE instruction ignored! " << *MI << "\n"); } return Location; } void X86AsmPrinter::PrintDebugValueComment(const MachineInstr *MI, raw_ostream &O) { // Only the target-dependent form of DBG_VALUE should get here. // Referencing the offset and metadata as NOps-2 and NOps-1 is // probably portable to other targets; frame pointer location is not. unsigned NOps = MI->getNumOperands(); assert(NOps==7); O << '\t' << MAI->getCommentString() << "DEBUG_VALUE: "; // cast away const; DIetc do not take const operands for some reason. DIVariable V(const_cast(MI->getOperand(NOps-1).getMetadata())); if (V.getContext().isSubprogram()) O << DISubprogram(V.getContext()).getDisplayName() << ":"; O << V.getName(); O << " <- "; // Frame address. Currently handles register +- offset only. O << '['; if (MI->getOperand(0).isReg() && MI->getOperand(0).getReg()) printOperand(MI, 0, O); else O << "undef"; O << '+'; printOperand(MI, 3, O); O << ']'; O << "+"; printOperand(MI, NOps-2, O); } //===----------------------------------------------------------------------===// // Target Registry Stuff //===----------------------------------------------------------------------===// static MCInstPrinter *createX86MCInstPrinter(const Target &T, unsigned SyntaxVariant, const MCAsmInfo &MAI) { if (SyntaxVariant == 0) return new X86ATTInstPrinter(MAI); if (SyntaxVariant == 1) return new X86IntelInstPrinter(MAI); return 0; } // Force static initialization. extern "C" void LLVMInitializeX86AsmPrinter() { RegisterAsmPrinter X(TheX86_32Target); RegisterAsmPrinter Y(TheX86_64Target); TargetRegistry::RegisterMCInstPrinter(TheX86_32Target,createX86MCInstPrinter); TargetRegistry::RegisterMCInstPrinter(TheX86_64Target,createX86MCInstPrinter); }