diff options
Diffstat (limited to 'contrib/llvm/lib/MC/MCAsmStreamer.cpp')
| -rw-r--r-- | contrib/llvm/lib/MC/MCAsmStreamer.cpp | 690 |
1 files changed, 321 insertions, 369 deletions
diff --git a/contrib/llvm/lib/MC/MCAsmStreamer.cpp b/contrib/llvm/lib/MC/MCAsmStreamer.cpp index ca49f8f5908e..14f0f05edd1f 100644 --- a/contrib/llvm/lib/MC/MCAsmStreamer.cpp +++ b/contrib/llvm/lib/MC/MCAsmStreamer.cpp @@ -8,8 +8,8 @@ //===----------------------------------------------------------------------===// #include "llvm/MC/MCStreamer.h" -#include "llvm/ADT/OwningPtr.h" #include "llvm/ADT/SmallString.h" +#include "llvm/ADT/STLExtras.h" #include "llvm/ADT/StringExtras.h" #include "llvm/ADT/Twine.h" #include "llvm/MC/MCAsmBackend.h" @@ -32,6 +32,7 @@ #include "llvm/Support/MathExtras.h" #include "llvm/Support/Path.h" #include <cctype> +#include <unordered_map> using namespace llvm; namespace { @@ -41,44 +42,33 @@ protected: formatted_raw_ostream &OS; const MCAsmInfo *MAI; private: - OwningPtr<MCInstPrinter> InstPrinter; - OwningPtr<MCCodeEmitter> Emitter; - OwningPtr<MCAsmBackend> AsmBackend; + std::unique_ptr<MCInstPrinter> InstPrinter; + std::unique_ptr<MCCodeEmitter> Emitter; + std::unique_ptr<MCAsmBackend> AsmBackend; SmallString<128> CommentToEmit; raw_svector_ostream CommentStream; unsigned IsVerboseAsm : 1; unsigned ShowInst : 1; - unsigned UseLoc : 1; - unsigned UseCFI : 1; unsigned UseDwarfDirectory : 1; - enum EHSymbolFlags { EHGlobal = 1, - EHWeakDefinition = 1 << 1, - EHPrivateExtern = 1 << 2 }; - DenseMap<const MCSymbol*, unsigned> FlagMap; - - bool needsSet(const MCExpr *Value); - void EmitRegisterName(int64_t Register); - virtual void EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame); - virtual void EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame); + void EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) override; + void EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) override; public: - MCAsmStreamer(MCContext &Context, MCTargetStreamer *TargetStreamer, - formatted_raw_ostream &os, bool isVerboseAsm, bool useLoc, - bool useCFI, bool useDwarfDirectory, MCInstPrinter *printer, - MCCodeEmitter *emitter, MCAsmBackend *asmbackend, bool showInst) - : MCStreamer(Context, TargetStreamer), OS(os), MAI(Context.getAsmInfo()), + MCAsmStreamer(MCContext &Context, formatted_raw_ostream &os, + bool isVerboseAsm, bool useDwarfDirectory, + MCInstPrinter *printer, MCCodeEmitter *emitter, + MCAsmBackend *asmbackend, bool showInst) + : MCStreamer(Context), OS(os), MAI(Context.getAsmInfo()), InstPrinter(printer), Emitter(emitter), AsmBackend(asmbackend), CommentStream(CommentToEmit), IsVerboseAsm(isVerboseAsm), - ShowInst(showInst), UseLoc(useLoc), UseCFI(useCFI), - UseDwarfDirectory(useDwarfDirectory) { + ShowInst(showInst), UseDwarfDirectory(useDwarfDirectory) { if (InstPrinter && IsVerboseAsm) InstPrinter->setCommentStream(CommentStream); } - ~MCAsmStreamer() {} inline void EmitEOL() { // If we don't have any comments, just emit a \n. @@ -92,172 +82,163 @@ public: /// isVerboseAsm - Return true if this streamer supports verbose assembly at /// all. - virtual bool isVerboseAsm() const { return IsVerboseAsm; } + bool isVerboseAsm() const override { return IsVerboseAsm; } /// hasRawTextSupport - We support EmitRawText. - virtual bool hasRawTextSupport() const { return true; } + bool hasRawTextSupport() const override { return true; } /// AddComment - Add a comment that can be emitted to the generated .s /// file if applicable as a QoI issue to make the output of the compiler /// more readable. This only affects the MCAsmStreamer, and only when /// verbose assembly output is enabled. - virtual void AddComment(const Twine &T); + void AddComment(const Twine &T) override; /// AddEncodingComment - Add a comment showing the encoding of an instruction. - virtual void AddEncodingComment(const MCInst &Inst); + void AddEncodingComment(const MCInst &Inst, const MCSubtargetInfo &); /// GetCommentOS - Return a raw_ostream that comments can be written to. /// Unlike AddComment, you are required to terminate comments with \n if you /// use this method. - virtual raw_ostream &GetCommentOS() { + raw_ostream &GetCommentOS() override { if (!IsVerboseAsm) return nulls(); // Discard comments unless in verbose asm mode. return CommentStream; } + void emitRawComment(const Twine &T, bool TabPrefix = true) override; + /// AddBlankLine - Emit a blank line to a .s file to pretty it up. - virtual void AddBlankLine() { + void AddBlankLine() override { EmitEOL(); } /// @name MCStreamer Interface /// @{ - virtual void ChangeSection(const MCSection *Section, - const MCExpr *Subsection); - - virtual void InitSections() { - InitToTextSection(); - } - - virtual void InitToTextSection() { - SwitchSection(getContext().getObjectFileInfo()->getTextSection()); - } - - virtual void EmitLabel(MCSymbol *Symbol); - virtual void EmitDebugLabel(MCSymbol *Symbol); - - virtual void EmitEHSymAttributes(const MCSymbol *Symbol, - MCSymbol *EHSymbol); - virtual void EmitAssemblerFlag(MCAssemblerFlag Flag); - virtual void EmitLinkerOptions(ArrayRef<std::string> Options); - virtual void EmitDataRegion(MCDataRegionType Kind); - virtual void EmitThumbFunc(MCSymbol *Func); - - virtual void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value); - virtual void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol); - virtual void EmitDwarfAdvanceLineAddr(int64_t LineDelta, - const MCSymbol *LastLabel, - const MCSymbol *Label, - unsigned PointerSize); - virtual void EmitDwarfAdvanceFrameAddr(const MCSymbol *LastLabel, - const MCSymbol *Label); - - virtual bool EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute); - - virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue); - virtual void BeginCOFFSymbolDef(const MCSymbol *Symbol); - virtual void EmitCOFFSymbolStorageClass(int StorageClass); - virtual void EmitCOFFSymbolType(int Type); - virtual void EndCOFFSymbolDef(); - virtual void EmitCOFFSecRel32(MCSymbol const *Symbol); - virtual void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value); - virtual void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size, - unsigned ByteAlignment); + void ChangeSection(const MCSection *Section, + const MCExpr *Subsection) override; + + void EmitLOHDirective(MCLOHType Kind, const MCLOHArgs &Args) override; + void EmitLabel(MCSymbol *Symbol) override; + + void EmitAssemblerFlag(MCAssemblerFlag Flag) override; + void EmitLinkerOptions(ArrayRef<std::string> Options) override; + void EmitDataRegion(MCDataRegionType Kind) override; + void EmitVersionMin(MCVersionMinType Kind, unsigned Major, unsigned Minor, + unsigned Update) override; + void EmitThumbFunc(MCSymbol *Func) override; + + void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) override; + void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) override; + bool EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute) override; + + void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) override; + void BeginCOFFSymbolDef(const MCSymbol *Symbol) override; + void EmitCOFFSymbolStorageClass(int StorageClass) override; + void EmitCOFFSymbolType(int Type) override; + void EndCOFFSymbolDef() override; + void EmitCOFFSectionIndex(MCSymbol const *Symbol) override; + void EmitCOFFSecRel32(MCSymbol const *Symbol) override; + void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) override; + void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size, + unsigned ByteAlignment) override; /// EmitLocalCommonSymbol - Emit a local common (.lcomm) symbol. /// /// @param Symbol - The common symbol to emit. /// @param Size - The size of the common symbol. /// @param ByteAlignment - The alignment of the common symbol in bytes. - virtual void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size, - unsigned ByteAlignment); - - virtual void EmitZerofill(const MCSection *Section, MCSymbol *Symbol = 0, - uint64_t Size = 0, unsigned ByteAlignment = 0); - - virtual void EmitTBSSSymbol (const MCSection *Section, MCSymbol *Symbol, - uint64_t Size, unsigned ByteAlignment = 0); - - virtual void EmitBytes(StringRef Data); - - virtual void EmitValueImpl(const MCExpr *Value, unsigned Size); - virtual void EmitIntValue(uint64_t Value, unsigned Size); - - virtual void EmitULEB128Value(const MCExpr *Value); - - virtual void EmitSLEB128Value(const MCExpr *Value); - - virtual void EmitGPRel64Value(const MCExpr *Value); - - virtual void EmitGPRel32Value(const MCExpr *Value); - - - virtual void EmitFill(uint64_t NumBytes, uint8_t FillValue); - - virtual void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value = 0, - unsigned ValueSize = 1, - unsigned MaxBytesToEmit = 0); - - virtual void EmitCodeAlignment(unsigned ByteAlignment, - unsigned MaxBytesToEmit = 0); - - virtual bool EmitValueToOffset(const MCExpr *Offset, - unsigned char Value = 0); - - virtual void EmitFileDirective(StringRef Filename); - virtual bool EmitDwarfFileDirective(unsigned FileNo, StringRef Directory, - StringRef Filename, unsigned CUID = 0); - virtual void EmitDwarfLocDirective(unsigned FileNo, unsigned Line, - unsigned Column, unsigned Flags, - unsigned Isa, unsigned Discriminator, - StringRef FileName); - - virtual void EmitIdent(StringRef IdentString); - virtual void EmitCFISections(bool EH, bool Debug); - virtual void EmitCFIDefCfa(int64_t Register, int64_t Offset); - virtual void EmitCFIDefCfaOffset(int64_t Offset); - virtual void EmitCFIDefCfaRegister(int64_t Register); - virtual void EmitCFIOffset(int64_t Register, int64_t Offset); - virtual void EmitCFIPersonality(const MCSymbol *Sym, unsigned Encoding); - virtual void EmitCFILsda(const MCSymbol *Sym, unsigned Encoding); - virtual void EmitCFIRememberState(); - virtual void EmitCFIRestoreState(); - virtual void EmitCFISameValue(int64_t Register); - virtual void EmitCFIRelOffset(int64_t Register, int64_t Offset); - virtual void EmitCFIAdjustCfaOffset(int64_t Adjustment); - virtual void EmitCFISignalFrame(); - virtual void EmitCFIUndefined(int64_t Register); - virtual void EmitCFIRegister(int64_t Register1, int64_t Register2); - virtual void EmitCFIWindowSave(); - - virtual void EmitWin64EHStartProc(const MCSymbol *Symbol); - virtual void EmitWin64EHEndProc(); - virtual void EmitWin64EHStartChained(); - virtual void EmitWin64EHEndChained(); - virtual void EmitWin64EHHandler(const MCSymbol *Sym, bool Unwind, - bool Except); - virtual void EmitWin64EHHandlerData(); - virtual void EmitWin64EHPushReg(unsigned Register); - virtual void EmitWin64EHSetFrame(unsigned Register, unsigned Offset); - virtual void EmitWin64EHAllocStack(unsigned Size); - virtual void EmitWin64EHSaveReg(unsigned Register, unsigned Offset); - virtual void EmitWin64EHSaveXMM(unsigned Register, unsigned Offset); - virtual void EmitWin64EHPushFrame(bool Code); - virtual void EmitWin64EHEndProlog(); - - virtual void EmitInstruction(const MCInst &Inst); - - virtual void EmitBundleAlignMode(unsigned AlignPow2); - virtual void EmitBundleLock(bool AlignToEnd); - virtual void EmitBundleUnlock(); + void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size, + unsigned ByteAlignment) override; + + void EmitZerofill(const MCSection *Section, MCSymbol *Symbol = nullptr, + uint64_t Size = 0, unsigned ByteAlignment = 0) override; + + void EmitTBSSSymbol (const MCSection *Section, MCSymbol *Symbol, + uint64_t Size, unsigned ByteAlignment = 0) override; + + void EmitBytes(StringRef Data) override; + + void EmitValueImpl(const MCExpr *Value, unsigned Size, + const SMLoc &Loc = SMLoc()) override; + void EmitIntValue(uint64_t Value, unsigned Size) override; + + void EmitULEB128Value(const MCExpr *Value) override; + + void EmitSLEB128Value(const MCExpr *Value) override; + + void EmitGPRel64Value(const MCExpr *Value) override; + + void EmitGPRel32Value(const MCExpr *Value) override; + + + void EmitFill(uint64_t NumBytes, uint8_t FillValue) override; + + void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value = 0, + unsigned ValueSize = 1, + unsigned MaxBytesToEmit = 0) override; + + void EmitCodeAlignment(unsigned ByteAlignment, + unsigned MaxBytesToEmit = 0) override; + + bool EmitValueToOffset(const MCExpr *Offset, + unsigned char Value = 0) override; + + void EmitFileDirective(StringRef Filename) override; + unsigned EmitDwarfFileDirective(unsigned FileNo, StringRef Directory, + StringRef Filename, + unsigned CUID = 0) override; + void EmitDwarfLocDirective(unsigned FileNo, unsigned Line, + unsigned Column, unsigned Flags, + unsigned Isa, unsigned Discriminator, + StringRef FileName) override; + MCSymbol *getDwarfLineTableSymbol(unsigned CUID) override; + + void EmitIdent(StringRef IdentString) override; + void EmitCFISections(bool EH, bool Debug) override; + void EmitCFIDefCfa(int64_t Register, int64_t Offset) override; + void EmitCFIDefCfaOffset(int64_t Offset) override; + void EmitCFIDefCfaRegister(int64_t Register) override; + void EmitCFIOffset(int64_t Register, int64_t Offset) override; + void EmitCFIPersonality(const MCSymbol *Sym, unsigned Encoding) override; + void EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) override; + void EmitCFIRememberState() override; + void EmitCFIRestoreState() override; + void EmitCFISameValue(int64_t Register) override; + void EmitCFIRelOffset(int64_t Register, int64_t Offset) override; + void EmitCFIAdjustCfaOffset(int64_t Adjustment) override; + void EmitCFISignalFrame() override; + void EmitCFIUndefined(int64_t Register) override; + void EmitCFIRegister(int64_t Register1, int64_t Register2) override; + void EmitCFIWindowSave() override; + + void EmitWinCFIStartProc(const MCSymbol *Symbol) override; + void EmitWinCFIEndProc() override; + void EmitWinCFIStartChained() override; + void EmitWinCFIEndChained() override; + void EmitWinCFIPushReg(unsigned Register) override; + void EmitWinCFISetFrame(unsigned Register, unsigned Offset) override; + void EmitWinCFIAllocStack(unsigned Size) override; + void EmitWinCFISaveReg(unsigned Register, unsigned Offset) override; + void EmitWinCFISaveXMM(unsigned Register, unsigned Offset) override; + void EmitWinCFIPushFrame(bool Code) override; + void EmitWinCFIEndProlog() override; + + void EmitWinEHHandler(const MCSymbol *Sym, bool Unwind, bool Except) override; + void EmitWinEHHandlerData() override; + + void EmitInstruction(const MCInst &Inst, const MCSubtargetInfo &STI) override; + + void EmitBundleAlignMode(unsigned AlignPow2) override; + void EmitBundleLock(bool AlignToEnd) override; + void EmitBundleUnlock() override; /// EmitRawText - If this file is backed by an assembly streamer, this dumps /// the specified string in the output .s file. This capability is /// indicated by the hasRawTextSupport() predicate. - virtual void EmitRawTextImpl(StringRef String); + void EmitRawTextImpl(StringRef String) override; - virtual void FinishImpl(); + void FinishImpl() override; }; } // end anonymous namespace. @@ -310,27 +291,19 @@ static inline int64_t truncateToSize(int64_t Value, unsigned Bytes) { return Value & ((uint64_t) (int64_t) -1 >> (64 - Bytes * 8)); } +void MCAsmStreamer::emitRawComment(const Twine &T, bool TabPrefix) { + if (TabPrefix) + OS << '\t'; + OS << MAI->getCommentString() << T; + EmitEOL(); +} + void MCAsmStreamer::ChangeSection(const MCSection *Section, const MCExpr *Subsection) { assert(Section && "Cannot switch to a null section!"); Section->PrintSwitchToSection(*MAI, OS, Subsection); } -void MCAsmStreamer::EmitEHSymAttributes(const MCSymbol *Symbol, - MCSymbol *EHSymbol) { - if (UseCFI) - return; - - unsigned Flags = FlagMap.lookup(Symbol); - - if (Flags & EHGlobal) - EmitSymbolAttribute(EHSymbol, MCSA_Global); - if (Flags & EHWeakDefinition) - EmitSymbolAttribute(EHSymbol, MCSA_WeakDefinition); - if (Flags & EHPrivateExtern) - EmitSymbolAttribute(EHSymbol, MCSA_PrivateExtern); -} - void MCAsmStreamer::EmitLabel(MCSymbol *Symbol) { assert(Symbol->isUndefined() && "Cannot define a symbol twice!"); MCStreamer::EmitLabel(Symbol); @@ -339,11 +312,24 @@ void MCAsmStreamer::EmitLabel(MCSymbol *Symbol) { EmitEOL(); } -void MCAsmStreamer::EmitDebugLabel(MCSymbol *Symbol) { - assert(Symbol->isUndefined() && "Cannot define a symbol twice!"); - MCStreamer::EmitDebugLabel(Symbol); +void MCAsmStreamer::EmitLOHDirective(MCLOHType Kind, const MCLOHArgs &Args) { + StringRef str = MCLOHIdToName(Kind); + +#ifndef NDEBUG + int NbArgs = MCLOHIdToNbArgs(Kind); + assert(NbArgs != -1 && ((size_t)NbArgs) == Args.size() && "Malformed LOH!"); + assert(str != "" && "Invalid LOH name"); +#endif - OS << *Symbol << MAI->getDebugLabelSuffix(); + OS << "\t" << MCLOHDirectiveName() << " " << str << "\t"; + bool IsFirst = true; + for (MCLOHArgs::const_iterator It = Args.begin(), EndIt = Args.end(); + It != EndIt; ++It) { + if (!IsFirst) + OS << ", "; + IsFirst = false; + OS << **It; + } EmitEOL(); } @@ -381,6 +367,18 @@ void MCAsmStreamer::EmitDataRegion(MCDataRegionType Kind) { EmitEOL(); } +void MCAsmStreamer::EmitVersionMin(MCVersionMinType Kind, unsigned Major, + unsigned Minor, unsigned Update) { + switch (Kind) { + case MCVM_IOSVersionMin: OS << "\t.ios_version_min"; break; + case MCVM_OSXVersionMin: OS << "\t.macosx_version_min"; break; + } + OS << " " << Major << ", " << Minor; + if (Update) + OS << ", " << Update; + EmitEOL(); +} + void MCAsmStreamer::EmitThumbFunc(MCSymbol *Func) { // This needs to emit to a temporary string to get properly quoted // MCSymbols when they have spaces in them. @@ -395,8 +393,7 @@ void MCAsmStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) { OS << *Symbol << " = " << *Value; EmitEOL(); - // FIXME: Lift context changes into super class. - Symbol->setVariableValue(Value); + MCStreamer::EmitAssignment(Symbol, Value); } void MCAsmStreamer::EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) { @@ -404,22 +401,6 @@ void MCAsmStreamer::EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) { EmitEOL(); } -void MCAsmStreamer::EmitDwarfAdvanceLineAddr(int64_t LineDelta, - const MCSymbol *LastLabel, - const MCSymbol *Label, - unsigned PointerSize) { - EmitDwarfSetLineAddr(LineDelta, Label, PointerSize); -} - -void MCAsmStreamer::EmitDwarfAdvanceFrameAddr(const MCSymbol *LastLabel, - const MCSymbol *Label) { - EmitIntValue(dwarf::DW_CFA_advance_loc4, 1); - const MCExpr *AddrDelta = BuildSymbolDiff(getContext(), Label, LastLabel); - AddrDelta = ForceExpAbs(AddrDelta); - EmitValue(AddrDelta, 4); -} - - bool MCAsmStreamer::EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute) { switch (Attribute) { @@ -449,7 +430,6 @@ bool MCAsmStreamer::EmitSymbolAttribute(MCSymbol *Symbol, return true; case MCSA_Global: // .globl/.global OS << MAI->getGlobalDirective(); - FlagMap[Symbol] |= EHGlobal; break; case MCSA_Hidden: OS << "\t.hidden\t"; break; case MCSA_IndirectSymbol: OS << "\t.indirect_symbol\t"; break; @@ -460,14 +440,12 @@ bool MCAsmStreamer::EmitSymbolAttribute(MCSymbol *Symbol, case MCSA_SymbolResolver: OS << "\t.symbol_resolver\t"; break; case MCSA_PrivateExtern: OS << "\t.private_extern\t"; - FlagMap[Symbol] |= EHPrivateExtern; break; case MCSA_Protected: OS << "\t.protected\t"; break; case MCSA_Reference: OS << "\t.reference\t"; break; case MCSA_Weak: OS << "\t.weak\t"; break; case MCSA_WeakDefinition: OS << "\t.weak_definition\t"; - FlagMap[Symbol] |= EHWeakDefinition; break; // .weak_reference case MCSA_WeakReference: OS << MAI->getWeakRefDirective(); break; @@ -505,8 +483,13 @@ void MCAsmStreamer::EndCOFFSymbolDef() { EmitEOL(); } +void MCAsmStreamer::EmitCOFFSectionIndex(MCSymbol const *Symbol) { + OS << "\t.secidx\t" << *Symbol; + EmitEOL(); +} + void MCAsmStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) { - OS << "\t.secrel32\t" << *Symbol << '\n'; + OS << "\t.secrel32\t" << *Symbol; EmitEOL(); } @@ -518,7 +501,7 @@ void MCAsmStreamer::EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) { void MCAsmStreamer::EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size, unsigned ByteAlignment) { // Common symbols do not belong to any actual section. - AssignSection(Symbol, NULL); + AssignSection(Symbol, nullptr); OS << "\t.comm\t" << *Symbol << ',' << Size; if (ByteAlignment != 0) { @@ -537,7 +520,7 @@ void MCAsmStreamer::EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size, void MCAsmStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size, unsigned ByteAlign) { // Common symbols do not belong to any actual section. - AssignSection(Symbol, NULL); + AssignSection(Symbol, nullptr); OS << "\t.lcomm\t" << *Symbol << ',' << Size; if (ByteAlign > 1) { @@ -568,7 +551,7 @@ void MCAsmStreamer::EmitZerofill(const MCSection *Section, MCSymbol *Symbol, const MCSectionMachO *MOSection = ((const MCSectionMachO*)Section); OS << MOSection->getSegmentName() << "," << MOSection->getSectionName(); - if (Symbol != NULL) { + if (Symbol) { OS << ',' << *Symbol << ',' << Size; if (ByteAlignment != 0) OS << ',' << Log2_32(ByteAlignment); @@ -583,7 +566,7 @@ void MCAsmStreamer::EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol, uint64_t Size, unsigned ByteAlignment) { AssignSection(Symbol, Section); - assert(Symbol != NULL && "Symbol shouldn't be NULL!"); + assert(Symbol && "Symbol shouldn't be NULL!"); // Instead of using the Section we'll just use the shortcut. // This is a mach-o specific directive and section. OS << ".tbss " << *Symbol << ", " << Size; @@ -660,28 +643,48 @@ void MCAsmStreamer::EmitIntValue(uint64_t Value, unsigned Size) { EmitValue(MCConstantExpr::Create(Value, getContext()), Size); } -void MCAsmStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size) { +void MCAsmStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size, + const SMLoc &Loc) { + assert(Size <= 8 && "Invalid size"); assert(getCurrentSection().first && "Cannot emit contents before setting section!"); - const char *Directive = 0; + const char *Directive = nullptr; switch (Size) { default: break; case 1: Directive = MAI->getData8bitsDirective(); break; case 2: Directive = MAI->getData16bitsDirective(); break; case 4: Directive = MAI->getData32bitsDirective(); break; - case 8: - Directive = MAI->getData64bitsDirective(); - // If the target doesn't support 64-bit data, emit as two 32-bit halves. - if (Directive) break; + case 8: Directive = MAI->getData64bitsDirective(); break; + } + + if (!Directive) { int64_t IntValue; if (!Value->EvaluateAsAbsolute(IntValue)) report_fatal_error("Don't know how to emit this value."); - if (MAI->isLittleEndian()) { - EmitIntValue((uint32_t)(IntValue >> 0 ), 4); - EmitIntValue((uint32_t)(IntValue >> 32), 4); - } else { - EmitIntValue((uint32_t)(IntValue >> 32), 4); - EmitIntValue((uint32_t)(IntValue >> 0 ), 4); + + // We couldn't handle the requested integer size so we fallback by breaking + // the request down into several, smaller, integers. Since sizes greater + // than eight are invalid and size equivalent to eight should have been + // handled earlier, we use four bytes as our largest piece of granularity. + bool IsLittleEndian = MAI->isLittleEndian(); + for (unsigned Emitted = 0; Emitted != Size;) { + unsigned Remaining = Size - Emitted; + // The size of our partial emission must be a power of two less than + // eight. + unsigned EmissionSize = PowerOf2Floor(Remaining); + if (EmissionSize > 4) + EmissionSize = 4; + // Calculate the byte offset of our partial emission taking into account + // the endianness of the target. + unsigned ByteOffset = + IsLittleEndian ? Emitted : (Remaining - EmissionSize); + uint64_t ValueToEmit = IntValue >> (ByteOffset * 8); + // We truncate our partial emission to fit within the bounds of the + // emission domain. This produces nicer output and silences potential + // truncation warnings when round tripping through another assembler. + ValueToEmit &= ~0ULL >> (64 - EmissionSize * 8); + EmitIntValue(ValueToEmit, EmissionSize); + Emitted += EmissionSize; } return; } @@ -714,13 +717,13 @@ void MCAsmStreamer::EmitSLEB128Value(const MCExpr *Value) { } void MCAsmStreamer::EmitGPRel64Value(const MCExpr *Value) { - assert(MAI->getGPRel64Directive() != 0); + assert(MAI->getGPRel64Directive() != nullptr); OS << MAI->getGPRel64Directive() << *Value; EmitEOL(); } void MCAsmStreamer::EmitGPRel32Value(const MCExpr *Value) { - assert(MAI->getGPRel32Directive() != 0); + assert(MAI->getGPRel32Directive() != nullptr); OS << MAI->getGPRel32Directive() << *Value; EmitEOL(); } @@ -750,12 +753,19 @@ void MCAsmStreamer::EmitValueToAlignment(unsigned ByteAlignment, int64_t Value, // emit alignments as a power of two if possible. if (isPowerOf2_32(ByteAlignment)) { switch (ValueSize) { - default: llvm_unreachable("Invalid size for machine code value!"); - case 1: OS << MAI->getAlignDirective(); break; - // FIXME: use MAI for this! - case 2: OS << ".p2alignw "; break; - case 4: OS << ".p2alignl "; break; - case 8: llvm_unreachable("Unsupported alignment size!"); + default: + llvm_unreachable("Invalid size for machine code value!"); + case 1: + OS << "\t.align\t"; + break; + case 2: + OS << ".p2alignw "; + break; + case 4: + OS << ".p2alignl "; + break; + case 8: + llvm_unreachable("Unsupported alignment size!"); } if (MAI->getAlignmentIsInBytes()) @@ -814,30 +824,42 @@ void MCAsmStreamer::EmitFileDirective(StringRef Filename) { EmitEOL(); } -bool MCAsmStreamer::EmitDwarfFileDirective(unsigned FileNo, StringRef Directory, - StringRef Filename, unsigned CUID) { +unsigned MCAsmStreamer::EmitDwarfFileDirective(unsigned FileNo, + StringRef Directory, + StringRef Filename, + unsigned CUID) { + assert(CUID == 0); + + MCDwarfLineTable &Table = getContext().getMCDwarfLineTable(CUID); + unsigned NumFiles = Table.getMCDwarfFiles().size(); + FileNo = Table.getFile(Directory, Filename, FileNo); + if (FileNo == 0) + return 0; + if (NumFiles == Table.getMCDwarfFiles().size()) + return FileNo; + + SmallString<128> FullPathName; + if (!UseDwarfDirectory && !Directory.empty()) { if (sys::path::is_absolute(Filename)) - return EmitDwarfFileDirective(FileNo, "", Filename, CUID); - - SmallString<128> FullPathName = Directory; - sys::path::append(FullPathName, Filename); - return EmitDwarfFileDirective(FileNo, "", FullPathName, CUID); + Directory = ""; + else { + FullPathName = Directory; + sys::path::append(FullPathName, Filename); + Directory = ""; + Filename = FullPathName; + } } - if (UseLoc) { - OS << "\t.file\t" << FileNo << ' '; - if (!Directory.empty()) { - PrintQuotedString(Directory, OS); - OS << ' '; - } - PrintQuotedString(Filename, OS); - EmitEOL(); - // All .file will belong to a single CUID. - CUID = 0; + OS << "\t.file\t" << FileNo << ' '; + if (!Directory.empty()) { + PrintQuotedString(Directory, OS); + OS << ' '; } - return this->MCStreamer::EmitDwarfFileDirective(FileNo, Directory, Filename, - CUID); + PrintQuotedString(Filename, OS); + EmitEOL(); + + return FileNo; } void MCAsmStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line, @@ -847,9 +869,6 @@ void MCAsmStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line, StringRef FileName) { this->MCStreamer::EmitDwarfLocDirective(FileNo, Line, Column, Flags, Isa, Discriminator, FileName); - if (!UseLoc) - return; - OS << "\t.loc\t" << FileNo << " " << Line << " " << Column; if (Flags & DWARF2_FLAG_BASIC_BLOCK) OS << " basic_block"; @@ -869,9 +888,9 @@ void MCAsmStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line, } if (Isa) - OS << "isa " << Isa; + OS << " isa " << Isa; if (Discriminator) - OS << "discriminator " << Discriminator; + OS << " discriminator " << Discriminator; if (IsVerboseAsm) { OS.PadToColumn(MAI->getCommentColumn()); @@ -881,6 +900,12 @@ void MCAsmStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line, EmitEOL(); } +MCSymbol *MCAsmStreamer::getDwarfLineTableSymbol(unsigned CUID) { + // Always use the zeroth line table, since asm syntax only supports one line + // table for now. + return MCStreamer::getDwarfLineTableSymbol(0); +} + void MCAsmStreamer::EmitIdent(StringRef IdentString) { assert(MAI->hasIdentDirective() && ".ident directive not supported"); OS << "\t.ident\t"; @@ -890,10 +915,6 @@ void MCAsmStreamer::EmitIdent(StringRef IdentString) { void MCAsmStreamer::EmitCFISections(bool EH, bool Debug) { MCStreamer::EmitCFISections(EH, Debug); - - if (!UseCFI) - return; - OS << "\t.cfi_sections "; if (EH) { OS << ".eh_frame"; @@ -907,25 +928,14 @@ void MCAsmStreamer::EmitCFISections(bool EH, bool Debug) { } void MCAsmStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) { - if (!UseCFI) { - RecordProcStart(Frame); - return; - } - OS << "\t.cfi_startproc"; + if (Frame.IsSimple) + OS << " simple"; EmitEOL(); } void MCAsmStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) { - if (!UseCFI) { - RecordProcEnd(Frame); - return; - } - - // Put a dummy non-null value in Frame.End to mark that this frame has been - // closed. - Frame.End = (MCSymbol *) 1; - + MCStreamer::EmitCFIEndProcImpl(Frame); OS << "\t.cfi_endproc"; EmitEOL(); } @@ -942,10 +952,6 @@ void MCAsmStreamer::EmitRegisterName(int64_t Register) { void MCAsmStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) { MCStreamer::EmitCFIDefCfa(Register, Offset); - - if (!UseCFI) - return; - OS << "\t.cfi_def_cfa "; EmitRegisterName(Register); OS << ", " << Offset; @@ -954,20 +960,12 @@ void MCAsmStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) { void MCAsmStreamer::EmitCFIDefCfaOffset(int64_t Offset) { MCStreamer::EmitCFIDefCfaOffset(Offset); - - if (!UseCFI) - return; - OS << "\t.cfi_def_cfa_offset " << Offset; EmitEOL(); } void MCAsmStreamer::EmitCFIDefCfaRegister(int64_t Register) { MCStreamer::EmitCFIDefCfaRegister(Register); - - if (!UseCFI) - return; - OS << "\t.cfi_def_cfa_register "; EmitRegisterName(Register); EmitEOL(); @@ -975,10 +973,6 @@ void MCAsmStreamer::EmitCFIDefCfaRegister(int64_t Register) { void MCAsmStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) { this->MCStreamer::EmitCFIOffset(Register, Offset); - - if (!UseCFI) - return; - OS << "\t.cfi_offset "; EmitRegisterName(Register); OS << ", " << Offset; @@ -988,50 +982,30 @@ void MCAsmStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) { void MCAsmStreamer::EmitCFIPersonality(const MCSymbol *Sym, unsigned Encoding) { MCStreamer::EmitCFIPersonality(Sym, Encoding); - - if (!UseCFI) - return; - OS << "\t.cfi_personality " << Encoding << ", " << *Sym; EmitEOL(); } void MCAsmStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) { MCStreamer::EmitCFILsda(Sym, Encoding); - - if (!UseCFI) - return; - OS << "\t.cfi_lsda " << Encoding << ", " << *Sym; EmitEOL(); } void MCAsmStreamer::EmitCFIRememberState() { MCStreamer::EmitCFIRememberState(); - - if (!UseCFI) - return; - OS << "\t.cfi_remember_state"; EmitEOL(); } void MCAsmStreamer::EmitCFIRestoreState() { MCStreamer::EmitCFIRestoreState(); - - if (!UseCFI) - return; - OS << "\t.cfi_restore_state"; EmitEOL(); } void MCAsmStreamer::EmitCFISameValue(int64_t Register) { MCStreamer::EmitCFISameValue(Register); - - if (!UseCFI) - return; - OS << "\t.cfi_same_value "; EmitRegisterName(Register); EmitEOL(); @@ -1039,10 +1013,6 @@ void MCAsmStreamer::EmitCFISameValue(int64_t Register) { void MCAsmStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) { MCStreamer::EmitCFIRelOffset(Register, Offset); - - if (!UseCFI) - return; - OS << "\t.cfi_rel_offset "; EmitRegisterName(Register); OS << ", " << Offset; @@ -1051,85 +1021,65 @@ void MCAsmStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) { void MCAsmStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) { MCStreamer::EmitCFIAdjustCfaOffset(Adjustment); - - if (!UseCFI) - return; - OS << "\t.cfi_adjust_cfa_offset " << Adjustment; EmitEOL(); } void MCAsmStreamer::EmitCFISignalFrame() { MCStreamer::EmitCFISignalFrame(); - - if (!UseCFI) - return; - OS << "\t.cfi_signal_frame"; EmitEOL(); } void MCAsmStreamer::EmitCFIUndefined(int64_t Register) { MCStreamer::EmitCFIUndefined(Register); - - if (!UseCFI) - return; - OS << "\t.cfi_undefined " << Register; EmitEOL(); } void MCAsmStreamer::EmitCFIRegister(int64_t Register1, int64_t Register2) { MCStreamer::EmitCFIRegister(Register1, Register2); - - if (!UseCFI) - return; - OS << "\t.cfi_register " << Register1 << ", " << Register2; EmitEOL(); } void MCAsmStreamer::EmitCFIWindowSave() { MCStreamer::EmitCFIWindowSave(); - - if (!UseCFI) - return; - OS << "\t.cfi_window_save"; EmitEOL(); } -void MCAsmStreamer::EmitWin64EHStartProc(const MCSymbol *Symbol) { - MCStreamer::EmitWin64EHStartProc(Symbol); +void MCAsmStreamer::EmitWinCFIStartProc(const MCSymbol *Symbol) { + MCStreamer::EmitWinCFIStartProc(Symbol); OS << ".seh_proc " << *Symbol; EmitEOL(); } -void MCAsmStreamer::EmitWin64EHEndProc() { - MCStreamer::EmitWin64EHEndProc(); +void MCAsmStreamer::EmitWinCFIEndProc() { + MCStreamer::EmitWinCFIEndProc(); OS << "\t.seh_endproc"; EmitEOL(); } -void MCAsmStreamer::EmitWin64EHStartChained() { - MCStreamer::EmitWin64EHStartChained(); +void MCAsmStreamer::EmitWinCFIStartChained() { + MCStreamer::EmitWinCFIStartChained(); OS << "\t.seh_startchained"; EmitEOL(); } -void MCAsmStreamer::EmitWin64EHEndChained() { - MCStreamer::EmitWin64EHEndChained(); +void MCAsmStreamer::EmitWinCFIEndChained() { + MCStreamer::EmitWinCFIEndChained(); OS << "\t.seh_endchained"; EmitEOL(); } -void MCAsmStreamer::EmitWin64EHHandler(const MCSymbol *Sym, bool Unwind, - bool Except) { - MCStreamer::EmitWin64EHHandler(Sym, Unwind, Except); +void MCAsmStreamer::EmitWinEHHandler(const MCSymbol *Sym, bool Unwind, + bool Except) { + MCStreamer::EmitWinEHHandler(Sym, Unwind, Except); OS << "\t.seh_handler " << *Sym; if (Unwind) @@ -1152,14 +1102,14 @@ static const MCSection *getWin64EHTableSection(StringRef suffix, SectionKind::getDataRel()); } -void MCAsmStreamer::EmitWin64EHHandlerData() { - MCStreamer::EmitWin64EHHandlerData(); +void MCAsmStreamer::EmitWinEHHandlerData() { + MCStreamer::EmitWinEHHandlerData(); // Switch sections. Don't call SwitchSection directly, because that will // cause the section switch to be visible in the emitted assembly. // We only do this so the section switch that terminates the handler // data block is visible. - MCWin64EHUnwindInfo *CurFrame = getCurrentW64UnwindInfo(); + MCWinFrameInfo *CurFrame = getCurrentWinFrameInfo(); StringRef suffix=MCWin64EHUnwindEmitter::GetSectionSuffix(CurFrame->Function); const MCSection *xdataSect = getWin64EHTableSection(suffix, getContext()); if (xdataSect) @@ -1169,43 +1119,43 @@ void MCAsmStreamer::EmitWin64EHHandlerData() { EmitEOL(); } -void MCAsmStreamer::EmitWin64EHPushReg(unsigned Register) { - MCStreamer::EmitWin64EHPushReg(Register); +void MCAsmStreamer::EmitWinCFIPushReg(unsigned Register) { + MCStreamer::EmitWinCFIPushReg(Register); OS << "\t.seh_pushreg " << Register; EmitEOL(); } -void MCAsmStreamer::EmitWin64EHSetFrame(unsigned Register, unsigned Offset) { - MCStreamer::EmitWin64EHSetFrame(Register, Offset); +void MCAsmStreamer::EmitWinCFISetFrame(unsigned Register, unsigned Offset) { + MCStreamer::EmitWinCFISetFrame(Register, Offset); OS << "\t.seh_setframe " << Register << ", " << Offset; EmitEOL(); } -void MCAsmStreamer::EmitWin64EHAllocStack(unsigned Size) { - MCStreamer::EmitWin64EHAllocStack(Size); +void MCAsmStreamer::EmitWinCFIAllocStack(unsigned Size) { + MCStreamer::EmitWinCFIAllocStack(Size); OS << "\t.seh_stackalloc " << Size; EmitEOL(); } -void MCAsmStreamer::EmitWin64EHSaveReg(unsigned Register, unsigned Offset) { - MCStreamer::EmitWin64EHSaveReg(Register, Offset); +void MCAsmStreamer::EmitWinCFISaveReg(unsigned Register, unsigned Offset) { + MCStreamer::EmitWinCFISaveReg(Register, Offset); OS << "\t.seh_savereg " << Register << ", " << Offset; EmitEOL(); } -void MCAsmStreamer::EmitWin64EHSaveXMM(unsigned Register, unsigned Offset) { - MCStreamer::EmitWin64EHSaveXMM(Register, Offset); +void MCAsmStreamer::EmitWinCFISaveXMM(unsigned Register, unsigned Offset) { + MCStreamer::EmitWinCFISaveXMM(Register, Offset); OS << "\t.seh_savexmm " << Register << ", " << Offset; EmitEOL(); } -void MCAsmStreamer::EmitWin64EHPushFrame(bool Code) { - MCStreamer::EmitWin64EHPushFrame(Code); +void MCAsmStreamer::EmitWinCFIPushFrame(bool Code) { + MCStreamer::EmitWinCFIPushFrame(Code); OS << "\t.seh_pushframe"; if (Code) @@ -1213,19 +1163,20 @@ void MCAsmStreamer::EmitWin64EHPushFrame(bool Code) { EmitEOL(); } -void MCAsmStreamer::EmitWin64EHEndProlog(void) { - MCStreamer::EmitWin64EHEndProlog(); +void MCAsmStreamer::EmitWinCFIEndProlog(void) { + MCStreamer::EmitWinCFIEndProlog(); OS << "\t.seh_endprologue"; EmitEOL(); } -void MCAsmStreamer::AddEncodingComment(const MCInst &Inst) { +void MCAsmStreamer::AddEncodingComment(const MCInst &Inst, + const MCSubtargetInfo &STI) { raw_ostream &OS = GetCommentOS(); SmallString<256> Code; SmallVector<MCFixup, 4> Fixups; raw_svector_ostream VecOS(Code); - Emitter->EncodeInstruction(Inst, VecOS, Fixups); + Emitter->EncodeInstruction(Inst, VecOS, Fixups, STI); VecOS.flush(); // If we are showing fixups, create symbolic markers in the encoded @@ -1304,13 +1255,13 @@ void MCAsmStreamer::AddEncodingComment(const MCInst &Inst) { } } -void MCAsmStreamer::EmitInstruction(const MCInst &Inst) { +void MCAsmStreamer::EmitInstruction(const MCInst &Inst, const MCSubtargetInfo &STI) { assert(getCurrentSection().first && "Cannot emit contents before setting section!"); // Show the encoding in a comment if we have a code emitter. if (Emitter) - AddEncodingComment(Inst); + AddEncodingComment(Inst, STI); // Show the MCInst if enabled. if (ShowInst) { @@ -1354,27 +1305,28 @@ void MCAsmStreamer::EmitRawTextImpl(StringRef String) { } void MCAsmStreamer::FinishImpl() { - // FIXME: This header is duplicated with MCObjectStreamer - // Dump out the dwarf file & directory tables and line tables. - const MCSymbol *LineSectionSymbol = NULL; - if (getContext().hasDwarfFiles() && !UseLoc) - LineSectionSymbol = MCDwarfFileTable::Emit(this); - // If we are generating dwarf for assembly source files dump out the sections. if (getContext().getGenDwarfForAssembly()) - MCGenDwarfInfo::Emit(this, LineSectionSymbol); - - if (!UseCFI) - EmitFrames(AsmBackend.get(), false); + MCGenDwarfInfo::Emit(this); + + // Emit the label for the line table, if requested - since the rest of the + // line table will be defined by .loc/.file directives, and not emitted + // directly, the label is the only work required here. + auto &Tables = getContext().getMCDwarfLineTables(); + if (!Tables.empty()) { + assert(Tables.size() == 1 && "asm output only supports one line table"); + if (auto *Label = Tables.begin()->second.getLabel()) { + SwitchSection(getContext().getObjectFileInfo()->getDwarfLineSection()); + EmitLabel(Label); + } + } } MCStreamer *llvm::createAsmStreamer(MCContext &Context, - MCTargetStreamer *TargetStreamer, formatted_raw_ostream &OS, - bool isVerboseAsm, bool useLoc, bool useCFI, - bool useDwarfDirectory, MCInstPrinter *IP, - MCCodeEmitter *CE, MCAsmBackend *MAB, - bool ShowInst) { - return new MCAsmStreamer(Context, TargetStreamer, OS, isVerboseAsm, useLoc, - useCFI, useDwarfDirectory, IP, CE, MAB, ShowInst); + bool isVerboseAsm, bool useDwarfDirectory, + MCInstPrinter *IP, MCCodeEmitter *CE, + MCAsmBackend *MAB, bool ShowInst) { + return new MCAsmStreamer(Context, OS, isVerboseAsm, useDwarfDirectory, IP, CE, + MAB, ShowInst); } |