X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FTarget%2FTargetLoweringObjectFile.h;h=3991035ce064823412f078ec14030b570c177664;hb=471e4224809f51652c71f319532697a879a75a0d;hp=7cb7b9891953d4cf1cfac76fe572d89d8e0a88ae;hpb=af76e592c7f9deff0e55c13dbb4a34f07f1c7f64;p=oota-llvm.git diff --git a/include/llvm/Target/TargetLoweringObjectFile.h b/include/llvm/Target/TargetLoweringObjectFile.h index 7cb7b989195..3991035ce06 100644 --- a/include/llvm/Target/TargetLoweringObjectFile.h +++ b/include/llvm/Target/TargetLoweringObjectFile.h @@ -15,17 +15,21 @@ #ifndef LLVM_TARGET_TARGETLOWERINGOBJECTFILE_H #define LLVM_TARGET_TARGETLOWERINGOBJECTFILE_H +#include "llvm/ADT/StringRef.h" #include "llvm/MC/SectionKind.h" namespace llvm { + class MachineModuleInfo; class Mangler; + class MCAsmInfo; + class MCContext; + class MCExpr; class MCSection; class MCSectionMachO; - class MCContext; + class MCSymbol; + class MCStreamer; class GlobalValue; - class StringRef; class TargetMachine; - class MCAsmInfo; class TargetLoweringObjectFile { MCContext *Ctx; @@ -65,10 +69,6 @@ protected: /// the section the Language Specific Data Area information is emitted to. const MCSection *LSDASection; - /// EHFrameSection - If exception handling is supported by the target, this is - /// the section the EH Frame is emitted to. - const MCSection *EHFrameSection; - // Dwarf sections for debug info. If a target supports debug info, these must // be set. const MCSection *DwarfAbbrevSection; @@ -84,11 +84,28 @@ protected: const MCSection *DwarfRangesSection; const MCSection *DwarfMacroInfoSection; + // Extra TLS Variable Data section. If the target needs to put additional + // information for a TLS variable, it'll go here. + const MCSection *TLSExtraDataSection; + + /// CommDirectiveSupportsAlignment - True if .comm supports alignment. This + /// is a hack for as long as we support 10.4 Tiger, whose assembler doesn't + /// support alignment on comm. + bool CommDirectiveSupportsAlignment; + + /// SupportsWeakEmptyEHFrame - True if target object file supports a + /// weak_definition of constant 0 for an omitted EH frame. + bool SupportsWeakOmittedEHFrame; + + /// IsFunctionEHFrameSymbolPrivate - This flag is set to true if the + /// "EH_frame" symbol for EH information should be an assembler temporary (aka + /// private linkage, aka an L or .L label) or false if it should be a normal + /// non-.globl label. This defaults to true. + bool IsFunctionEHFrameSymbolPrivate; public: MCContext &getContext() const { return *Ctx; } - virtual ~TargetLoweringObjectFile(); /// Initialize - this method must be called before any actual lowering is @@ -98,14 +115,27 @@ public: Ctx = &ctx; } + bool isFunctionEHFrameSymbolPrivate() const { + return IsFunctionEHFrameSymbolPrivate; + } + bool getSupportsWeakOmittedEHFrame() const { + return SupportsWeakOmittedEHFrame; + } + bool getCommDirectiveSupportsAlignment() const { + return CommDirectiveSupportsAlignment; + } + const MCSection *getTextSection() const { return TextSection; } const MCSection *getDataSection() const { return DataSection; } const MCSection *getBSSSection() const { return BSSSection; } const MCSection *getStaticCtorSection() const { return StaticCtorSection; } const MCSection *getStaticDtorSection() const { return StaticDtorSection; } const MCSection *getLSDASection() const { return LSDASection; } - const MCSection *getEHFrameSection() const { return EHFrameSection; } + virtual const MCSection *getEHFrameSection() const = 0; + virtual void emitPersonalityValue(MCStreamer &Streamer, + const TargetMachine &TM, + const MCSymbol *Sym) const; const MCSection *getDwarfAbbrevSection() const { return DwarfAbbrevSection; } const MCSection *getDwarfInfoSection() const { return DwarfInfoSection; } const MCSection *getDwarfLineSection() const { return DwarfLineSection; } @@ -122,6 +152,11 @@ public: const MCSection *getDwarfMacroInfoSection() const { return DwarfMacroInfoSection; } + const MCSection *getTLSExtraDataSection() const { + return TLSExtraDataSection; + } + virtual const MCSection *getWin64EHFuncTableSection(StringRef suffix)const=0; + virtual const MCSection *getWin64EHTableSection(StringRef suffix) const = 0; /// shouldEmitUsedDirectiveFor - This hook allows targets to selectively /// decide not to emit the UsedDirective for some symbols in llvm.used. @@ -173,155 +208,33 @@ public: return 0; } -protected: - virtual const MCSection * - SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind, - Mangler *Mang, const TargetMachine &TM) const; -}; - - - - -class TargetLoweringObjectFileELF : public TargetLoweringObjectFile { - mutable void *UniquingMap; -protected: - /// TLSDataSection - Section directive for Thread Local data. - /// - const MCSection *TLSDataSection; // Defaults to ".tdata". - - /// TLSBSSSection - Section directive for Thread Local uninitialized data. - /// Null if this target doesn't support a BSS section. + /// getExprForDwarfGlobalReference - Return an MCExpr to use for a reference + /// to the specified global variable from exception handling information. /// - const MCSection *TLSBSSSection; // Defaults to ".tbss". - - const MCSection *DataRelSection; - const MCSection *DataRelLocalSection; - const MCSection *DataRelROSection; - const MCSection *DataRelROLocalSection; - - const MCSection *MergeableConst4Section; - const MCSection *MergeableConst8Section; - const MCSection *MergeableConst16Section; - -protected: - const MCSection *getELFSection(StringRef Section, unsigned Type, - unsigned Flags, SectionKind Kind, - bool IsExplicit = false) const; -public: - TargetLoweringObjectFileELF() : UniquingMap(0) {} - ~TargetLoweringObjectFileELF(); - - virtual void Initialize(MCContext &Ctx, const TargetMachine &TM); - - /// getSectionForConstant - Given a constant with the SectionKind, return a - /// section that it should be placed in. - virtual const MCSection *getSectionForConstant(SectionKind Kind) const; - - - virtual const MCSection * - getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind, - Mangler *Mang, const TargetMachine &TM) const; - - virtual const MCSection * - SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind, - Mangler *Mang, const TargetMachine &TM) const; -}; - - - -class TargetLoweringObjectFileMachO : public TargetLoweringObjectFile { - mutable void *UniquingMap; - - const MCSection *CStringSection; - const MCSection *UStringSection; - const MCSection *TextCoalSection; - const MCSection *ConstTextCoalSection; - const MCSection *ConstDataCoalSection; - const MCSection *ConstDataSection; - const MCSection *DataCoalSection; - const MCSection *FourByteConstantSection; - const MCSection *EightByteConstantSection; - const MCSection *SixteenByteConstantSection; - - const MCSection *LazySymbolPointerSection; - const MCSection *NonLazySymbolPointerSection; -public: - TargetLoweringObjectFileMachO() : UniquingMap(0) {} - ~TargetLoweringObjectFileMachO(); - - virtual void Initialize(MCContext &Ctx, const TargetMachine &TM); - - virtual const MCSection * - SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind, - Mangler *Mang, const TargetMachine &TM) const; - - virtual const MCSection * - getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind, - Mangler *Mang, const TargetMachine &TM) const; - - virtual const MCSection *getSectionForConstant(SectionKind Kind) const; - - /// shouldEmitUsedDirectiveFor - This hook allows targets to selectively - /// decide not to emit the UsedDirective for some symbols in llvm.used. - /// FIXME: REMOVE this (rdar://7071300) - virtual bool shouldEmitUsedDirectiveFor(const GlobalValue *GV, - Mangler *) const; - - /// getMachOSection - Return the MCSection for the specified mach-o section. - /// This requires the operands to be valid. - const MCSectionMachO *getMachOSection(const StringRef &Segment, - const StringRef &Section, - unsigned TypeAndAttributes, - SectionKind K) const { - return getMachOSection(Segment, Section, TypeAndAttributes, 0, K); - } - const MCSectionMachO *getMachOSection(const StringRef &Segment, - const StringRef &Section, - unsigned TypeAndAttributes, - unsigned Reserved2, - SectionKind K) const; - - /// getTextCoalSection - Return the "__TEXT,__textcoal_nt" section we put weak - /// symbols into. - const MCSection *getTextCoalSection() const { - return TextCoalSection; - } - - /// getLazySymbolPointerSection - Return the section corresponding to - /// the .lazy_symbol_pointer directive. - const MCSection *getLazySymbolPointerSection() const { - return LazySymbolPointerSection; - } - - /// getNonLazySymbolPointerSection - Return the section corresponding to - /// the .non_lazy_symbol_pointer directive. - const MCSection *getNonLazySymbolPointerSection() const { - return NonLazySymbolPointerSection; - } -}; + virtual const MCExpr * + getExprForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang, + MachineModuleInfo *MMI, unsigned Encoding, + MCStreamer &Streamer) const; + + // getCFIPersonalitySymbol - The symbol that gets passed to .cfi_personality. + virtual MCSymbol * + getCFIPersonalitySymbol(const GlobalValue *GV, Mangler *Mang, + MachineModuleInfo *MMI) const; + + /// + const MCExpr * + getExprForDwarfReference(const MCSymbol *Sym, unsigned Encoding, + MCStreamer &Streamer) const; + + virtual unsigned getPersonalityEncoding() const; + virtual unsigned getLSDAEncoding() const; + virtual unsigned getFDEEncoding(bool CFI) const; + virtual unsigned getTTypeEncoding() const; - - -class TargetLoweringObjectFileCOFF : public TargetLoweringObjectFile { - mutable void *UniquingMap; -public: - TargetLoweringObjectFileCOFF() : UniquingMap(0) {} - ~TargetLoweringObjectFileCOFF(); - - virtual void Initialize(MCContext &Ctx, const TargetMachine &TM); - - virtual const MCSection * - getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind, - Mangler *Mang, const TargetMachine &TM) const; - +protected: virtual const MCSection * SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind, Mangler *Mang, const TargetMachine &TM) const; - - /// getCOFFSection - Return the MCSection for the specified COFF section. - /// FIXME: Switch this to a semantic view eventually. - const MCSection *getCOFFSection(const char *Name, bool isDirective, - SectionKind K) const; }; } // end namespace llvm