X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FTarget%2FTargetLoweringObjectFile.h;h=7cf23b5a38811a0b670f7476e5ca83bca59978e7;hb=00552e3875ee5f382db6c98286a241a7d0efe1b8;hp=4aedd3aa31de22f9b2b817d1a3075b86920c5aae;hpb=f62176f04759d1841e97064297337645cf536423;p=oota-llvm.git diff --git a/include/llvm/Target/TargetLoweringObjectFile.h b/include/llvm/Target/TargetLoweringObjectFile.h index 4aedd3aa31d..7cf23b5a388 100644 --- a/include/llvm/Target/TargetLoweringObjectFile.h +++ b/include/llvm/Target/TargetLoweringObjectFile.h @@ -29,123 +29,124 @@ namespace llvm { class MCSymbol; class MCSymbolRefExpr; class MCStreamer; + class MCValue; class ConstantExpr; class GlobalValue; class TargetMachine; - + class TargetLoweringObjectFile : public MCObjectFileInfo { MCContext *Ctx; - const DataLayout *DL; TargetLoweringObjectFile( - const TargetLoweringObjectFile&) LLVM_DELETED_FUNCTION; - void operator=(const TargetLoweringObjectFile&) LLVM_DELETED_FUNCTION; + const TargetLoweringObjectFile&) = delete; + void operator=(const TargetLoweringObjectFile&) = delete; + +protected: + bool SupportIndirectSymViaGOTPCRel; + bool SupportGOTPCRelWithOffset; public: MCContext &getContext() const { return *Ctx; } - TargetLoweringObjectFile() : MCObjectFileInfo(), Ctx(0), DL(0) {} - + TargetLoweringObjectFile() + : MCObjectFileInfo(), Ctx(nullptr), SupportIndirectSymViaGOTPCRel(false), + SupportGOTPCRelWithOffset(true) {} + virtual ~TargetLoweringObjectFile(); - - /// Initialize - this method must be called before any actual lowering is - /// done. This specifies the current context for codegen, and gives the - /// lowering implementations a chance to set up their default sections. + + /// This method must be called before any actual lowering is done. This + /// specifies the current context for codegen, and gives the lowering + /// implementations a chance to set up their default sections. virtual void Initialize(MCContext &ctx, const TargetMachine &TM); - - virtual void emitPersonalityValue(MCStreamer &Streamer, - const TargetMachine &TM, + + virtual void emitPersonalityValue(MCStreamer &Streamer, const DataLayout &TM, const MCSymbol *Sym) const; - /// emitModuleFlags - Emit the module flags that the platform cares about. - virtual void emitModuleFlags(MCStreamer &, - ArrayRef, - Mangler *, const TargetMachine &) const { - } + /// Emit the module flags that the platform cares about. + virtual void emitModuleFlags(MCStreamer &Streamer, + ArrayRef Flags, + Mangler &Mang, const TargetMachine &TM) 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 { - return GV != 0; - } - - /// getSectionForConstant - Given a constant with the SectionKind, return a - /// section that it should be placed in. - virtual const MCSection *getSectionForConstant(SectionKind Kind) const; - - /// getKindForGlobal - Classify the specified global variable into a set of - /// target independent categories embodied in SectionKind. + /// Given a constant with the SectionKind, return a section that it should be + /// placed in. + virtual MCSection *getSectionForConstant(const DataLayout &DL, + SectionKind Kind, + const Constant *C) const; + + /// Classify the specified global variable into a set of target independent + /// categories embodied in SectionKind. static SectionKind getKindForGlobal(const GlobalValue *GV, const TargetMachine &TM); - - /// SectionForGlobal - This method computes the appropriate section to emit - /// the specified global variable or function definition. This should not - /// be passed external (or available externally) globals. - const MCSection *SectionForGlobal(const GlobalValue *GV, - SectionKind Kind, Mangler *Mang, - const TargetMachine &TM) const; - - /// SectionForGlobal - This method computes the appropriate section to emit - /// the specified global variable or function definition. This should not - /// be passed external (or available externally) globals. - const MCSection *SectionForGlobal(const GlobalValue *GV, - Mangler *Mang, - const TargetMachine &TM) const { + + /// This method computes the appropriate section to emit the specified global + /// variable or function definition. This should not be passed external (or + /// available externally) globals. + MCSection *SectionForGlobal(const GlobalValue *GV, SectionKind Kind, + Mangler &Mang, const TargetMachine &TM) const; + + /// This method computes the appropriate section to emit the specified global + /// variable or function definition. This should not be passed external (or + /// available externally) globals. + MCSection *SectionForGlobal(const GlobalValue *GV, Mangler &Mang, + const TargetMachine &TM) const { return SectionForGlobal(GV, getKindForGlobal(GV, TM), Mang, TM); } - /// getExplicitSectionGlobal - Targets should implement this method to assign - /// a section to globals with an explicit section specfied. The - /// implementation of this method can assume that GV->hasSection() is true. - virtual const MCSection * - getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind, - Mangler *Mang, const TargetMachine &TM) const = 0; - - /// getSpecialCasedSectionGlobals - Allow the target to completely override - /// section assignment of a global. - virtual const MCSection * - getSpecialCasedSectionGlobals(const GlobalValue *GV, Mangler *Mang, - SectionKind Kind) const { - return 0; + virtual void getNameWithPrefix(SmallVectorImpl &OutName, + const GlobalValue *GV, + bool CannotUsePrivateLabel, Mangler &Mang, + const TargetMachine &TM) const; + + virtual MCSection *getSectionForJumpTable(const Function &F, Mangler &Mang, + const TargetMachine &TM) const; + + virtual bool shouldPutJumpTableInFunctionSection(bool UsesLabelDifference, + const Function &F) const; + + /// Targets should implement this method to assign a section to globals with + /// an explicit section specfied. The implementation of this method can + /// assume that GV->hasSection() is true. + virtual MCSection * + getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind, + Mangler &Mang, const TargetMachine &TM) const = 0; + + /// Allow the target to completely override section assignment of a global. + virtual const MCSection *getSpecialCasedSectionGlobals(const GlobalValue *GV, + SectionKind Kind, + Mangler &Mang) const { + return nullptr; } - - /// getTTypeGlobalReference - Return an MCExpr to use for a reference - /// to the specified global variable from exception handling information. - /// - virtual const MCExpr * - getTTypeGlobalReference(const GlobalValue *GV, Mangler *Mang, - MachineModuleInfo *MMI, unsigned Encoding, - MCStreamer &Streamer) const; - /// Return the MCSymbol for the specified global value. This symbol is the - /// main label that is the address of the global - MCSymbol *getSymbol(Mangler &M, const GlobalValue *GV) const; + /// Return an MCExpr to use for a reference to the specified global variable + /// from exception handling information. + virtual const MCExpr * + getTTypeGlobalReference(const GlobalValue *GV, unsigned Encoding, + Mangler &Mang, const TargetMachine &TM, + MachineModuleInfo *MMI, MCStreamer &Streamer) const; /// Return the MCSymbol for a private symbol with global value name as its /// base, with the specified suffix. - MCSymbol *getSymbolWithGlobalValueBase(Mangler &M, const GlobalValue *GV, - StringRef Suffix) const; + MCSymbol *getSymbolWithGlobalValueBase(const GlobalValue *GV, + StringRef Suffix, Mangler &Mang, + const TargetMachine &TM) const; - // getCFIPersonalitySymbol - The symbol that gets passed to .cfi_personality. - virtual MCSymbol * - getCFIPersonalitySymbol(const GlobalValue *GV, Mangler *Mang, - MachineModuleInfo *MMI) const; + // The symbol that gets passed to .cfi_personality. + virtual MCSymbol *getCFIPersonalitySymbol(const GlobalValue *GV, + Mangler &Mang, + const TargetMachine &TM, + MachineModuleInfo *MMI) const; - /// const MCExpr * getTTypeReference(const MCSymbolRefExpr *Sym, unsigned Encoding, MCStreamer &Streamer) const; - virtual const MCSection * - getStaticCtorSection(unsigned Priority = 65535) const { - (void)Priority; + virtual MCSection *getStaticCtorSection(unsigned Priority, + const MCSymbol *KeySym) const { return StaticCtorSection; } - virtual const MCSection * - getStaticDtorSection(unsigned Priority = 65535) const { - (void)Priority; + + virtual MCSection *getStaticDtorSection(unsigned Priority, + const MCSymbol *KeySym) const { return StaticDtorSection; } @@ -154,14 +155,39 @@ public: virtual const MCExpr *getDebugThreadLocalSymbol(const MCSymbol *Sym) const; virtual const MCExpr * - getExecutableRelativeSymbol(const ConstantExpr *CE, Mangler *Mang) const { - return 0; + getExecutableRelativeSymbol(const ConstantExpr *CE, Mangler &Mang, + const TargetMachine &TM) const { + return nullptr; + } + + /// \brief Target supports replacing a data "PC"-relative access to a symbol + /// through another symbol, by accessing the later via a GOT entry instead? + bool supportIndirectSymViaGOTPCRel() const { + return SupportIndirectSymViaGOTPCRel; } + /// \brief Target GOT "PC"-relative relocation supports encoding an additional + /// binary expression with an offset? + bool supportGOTPCRelWithOffset() const { + return SupportGOTPCRelWithOffset; + } + + /// \brief Get the target specific PC relative GOT entry relocation + virtual const MCExpr *getIndirectSymViaGOTPCRel(const MCSymbol *Sym, + const MCValue &MV, + int64_t Offset, + MachineModuleInfo *MMI, + MCStreamer &Streamer) const { + return nullptr; + } + + virtual void emitLinkerFlagsForGlobal(raw_ostream &OS, const GlobalValue *GV, + const Mangler &Mang) const {} + protected: - virtual const MCSection * - SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind, - Mangler *Mang, const TargetMachine &TM) const; + virtual MCSection *SelectSectionForGlobal(const GlobalValue *GV, + SectionKind Kind, Mangler &Mang, + const TargetMachine &TM) const = 0; }; } // end namespace llvm