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Diffstat (limited to 'contrib/llvm/include/llvm/Target/TargetLoweringObjectFile.h')
-rw-r--r-- | contrib/llvm/include/llvm/Target/TargetLoweringObjectFile.h | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/contrib/llvm/include/llvm/Target/TargetLoweringObjectFile.h b/contrib/llvm/include/llvm/Target/TargetLoweringObjectFile.h new file mode 100644 index 0000000..9958755 --- /dev/null +++ b/contrib/llvm/include/llvm/Target/TargetLoweringObjectFile.h @@ -0,0 +1,149 @@ +//===-- llvm/Target/TargetLoweringObjectFile.h - Object Info ----*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file implements classes used to handle lowerings specific to common +// object file formats. +// +//===----------------------------------------------------------------------===// + +#ifndef LLVM_TARGET_TARGETLOWERINGOBJECTFILE_H +#define LLVM_TARGET_TARGETLOWERINGOBJECTFILE_H + +#include "llvm/ADT/ArrayRef.h" +#include "llvm/IR/Module.h" +#include "llvm/MC/MCObjectFileInfo.h" +#include "llvm/MC/SectionKind.h" + +namespace llvm { + class MachineModuleInfo; + class Mangler; + class MCContext; + class MCExpr; + class MCSection; + class MCSymbol; + class MCSymbolRefExpr; + class MCStreamer; + class GlobalValue; + class TargetMachine; + +class TargetLoweringObjectFile : public MCObjectFileInfo { + MCContext *Ctx; + + TargetLoweringObjectFile( + const TargetLoweringObjectFile&) LLVM_DELETED_FUNCTION; + void operator=(const TargetLoweringObjectFile&) LLVM_DELETED_FUNCTION; + +public: + MCContext &getContext() const { return *Ctx; } + + TargetLoweringObjectFile() : MCObjectFileInfo(), Ctx(0) {} + + 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. + 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 { + } + + /// 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. + 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 { + 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; + } + + /// 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; + + // getCFIPersonalitySymbol - The symbol that gets passed to .cfi_personality. + virtual MCSymbol * + getCFIPersonalitySymbol(const GlobalValue *GV, Mangler *Mang, + MachineModuleInfo *MMI) const; + + /// + const MCExpr * + getTTypeReference(const MCSymbolRefExpr *Sym, unsigned Encoding, + MCStreamer &Streamer) const; + + virtual const MCSection * + getStaticCtorSection(unsigned Priority = 65535) const { + (void)Priority; + return StaticCtorSection; + } + virtual const MCSection * + getStaticDtorSection(unsigned Priority = 65535) const { + (void)Priority; + return StaticDtorSection; + } + +protected: + virtual const MCSection * + SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind, + Mangler *Mang, const TargetMachine &TM) const; +}; + +} // end namespace llvm + +#endif |