class MCSymbol;
class MCSymbolRefExpr;
class MCStreamer;
+ class MCValue;
+ class ConstantExpr;
class GlobalValue;
class TargetMachine;
-
+
class TargetLoweringObjectFile : public MCObjectFileInfo {
MCContext *Ctx;
TargetLoweringObjectFile(
- const TargetLoweringObjectFile&) LLVM_DELETED_FUNCTION;
- void operator=(const TargetLoweringObjectFile&) LLVM_DELETED_FUNCTION;
+ const TargetLoweringObjectFile&) = delete;
+ void operator=(const TargetLoweringObjectFile&) = delete;
+
+protected:
+ const DataLayout *DL;
+ bool SupportIndirectSymViaGOTPCRel;
+ bool SupportGOTPCRelWithOffset;
public:
MCContext &getContext() const { return *Ctx; }
- TargetLoweringObjectFile() : MCObjectFileInfo(), Ctx(0) {}
-
+ TargetLoweringObjectFile() : MCObjectFileInfo(), Ctx(nullptr), DL(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,
const MCSymbol *Sym) const;
- /// emitModuleFlags - Emit the module flags that the platform cares about.
- virtual void emitModuleFlags(MCStreamer &,
- ArrayRef<Module::ModuleFlagEntry>,
- Mangler *, const TargetMachine &) const {
+ /// Extract the dependent library name from a linker option string. Returns
+ /// StringRef() if the option does not specify a library.
+ virtual StringRef getDepLibFromLinkerOpt(StringRef LinkerOption) const {
+ return StringRef();
}
- /// 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.
+ /// Emit the module flags that the platform cares about.
+ virtual void emitModuleFlags(MCStreamer &Streamer,
+ ArrayRef<Module::ModuleFlagEntry> Flags,
+ Mangler &Mang, const TargetMachine &TM) const {}
+
+ /// Given a constant with the SectionKind, return a section that it should be
+ /// placed in.
+ virtual MCSection *getSectionForConstant(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<char> &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;
- // getCFIPersonalitySymbol - The symbol that gets passed to .cfi_personality.
- virtual MCSymbol *
- getCFIPersonalitySymbol(const GlobalValue *GV, Mangler *Mang,
- MachineModuleInfo *MMI) 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(const GlobalValue *GV,
+ StringRef Suffix, Mangler &Mang,
+ const TargetMachine &TM) 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;
}
/// emitting the address in debug info.
virtual const MCExpr *getDebugThreadLocalSymbol(const MCSymbol *Sym) const;
+ virtual const MCExpr *
+ 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;
+ }
+
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
projects / oota-llvm.git / blobdiff