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//==-- llvm/CodeGen/TargetLoweringObjectFileImpl.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_CODEGEN_TARGETLOWERINGOBJECTFILEIMPL_H
#define LLVM_CODEGEN_TARGETLOWERINGOBJECTFILEIMPL_H
#include "llvm/ADT/StringRef.h"
#include "llvm/MC/SectionKind.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
namespace llvm {
class MachineModuleInfo;
class Mangler;
class MCAsmInfo;
class MCExpr;
class MCSection;
class MCSectionMachO;
class MCSymbol;
class MCContext;
class GlobalValue;
class TargetMachine;
class TargetLoweringObjectFileELF : public TargetLoweringObjectFile {
bool UseInitArray;
public:
virtual ~TargetLoweringObjectFileELF() {}
virtual void emitPersonalityValue(MCStreamer &Streamer,
const TargetMachine &TM,
const MCSymbol *Sym) const;
/// 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;
/// Return an MCExpr to use for a reference to the specified type info global
/// variable from exception handling information.
virtual const MCExpr *
getTTypeGlobalReference(const GlobalValue *GV, Mangler *Mang,
MachineModuleInfo *MMI, unsigned Encoding,
MCStreamer &Streamer) const;
// The symbol that gets passed to .cfi_personality.
virtual MCSymbol *
getCFIPersonalitySymbol(const GlobalValue *GV, Mangler *Mang,
MachineModuleInfo *MMI) const;
void InitializeELF(bool UseInitArray_);
virtual const MCSection *
getStaticCtorSection(unsigned Priority = 65535) const;
virtual const MCSection *
getStaticDtorSection(unsigned Priority = 65535) const;
};
class TargetLoweringObjectFileMachO : public TargetLoweringObjectFile {
public:
virtual ~TargetLoweringObjectFileMachO() {}
/// 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;
/// Emit the module flags that specify the garbage collection information.
virtual void emitModuleFlags(MCStreamer &Streamer,
ArrayRef<Module::ModuleFlagEntry> ModuleFlags,
Mangler *Mang, const TargetMachine &TM) const;
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;
/// 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;
/// The mach-o version of this method defaults to returning a stub reference.
virtual const MCExpr *
getTTypeGlobalReference(const GlobalValue *GV, Mangler *Mang,
MachineModuleInfo *MMI, unsigned Encoding,
MCStreamer &Streamer) const;
// The symbol that gets passed to .cfi_personality.
virtual MCSymbol *
getCFIPersonalitySymbol(const GlobalValue *GV, Mangler *Mang,
MachineModuleInfo *MMI) const;
};
class TargetLoweringObjectFileCOFF : public TargetLoweringObjectFile {
public:
virtual ~TargetLoweringObjectFileCOFF() {}
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;
/// 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;
/// Emit Obj-C garbage collection and linker options. Only linker option
/// emission is implemented for COFF.
virtual void emitModuleFlags(MCStreamer &Streamer,
ArrayRef<Module::ModuleFlagEntry> ModuleFlags,
Mangler *Mang, const TargetMachine &TM) const;
};
} // end namespace llvm
#endif
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