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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/MC/MCExpr.h"
#include "llvm/MC/SectionKind.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
namespace llvm {
class MachineModuleInfo;
class Mangler;
class MCAsmInfo;
class MCSection;
class MCSectionMachO;
class MCSymbol;
class MCContext;
class GlobalValue;
class TargetMachine;
class TargetLoweringObjectFileELF : public TargetLoweringObjectFile {
bool UseInitArray;
mutable unsigned NextUniqueID = 0;
protected:
MCSymbolRefExpr::VariantKind PLTRelativeVariantKind =
MCSymbolRefExpr::VK_None;
public:
TargetLoweringObjectFileELF() : UseInitArray(false) {}
~TargetLoweringObjectFileELF() override {}
void emitPersonalityValue(MCStreamer &Streamer, const DataLayout &TM,
const MCSymbol *Sym) const override;
/// Given a constant with the SectionKind, return a section that it should be
/// placed in.
MCSection *getSectionForConstant(const DataLayout &DL, SectionKind Kind,
const Constant *C,
unsigned &Align) const override;
MCSection *getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
Mangler &Mang,
const TargetMachine &TM) const override;
MCSection *SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
Mangler &Mang,
const TargetMachine &TM) const override;
MCSection *getSectionForJumpTable(const Function &F, Mangler &Mang,
const TargetMachine &TM) const override;
bool shouldPutJumpTableInFunctionSection(bool UsesLabelDifference,
const Function &F) const override;
/// Return an MCExpr to use for a reference to the specified type info global
/// variable from exception handling information.
const MCExpr *
getTTypeGlobalReference(const GlobalValue *GV, unsigned Encoding,
Mangler &Mang, const TargetMachine &TM,
MachineModuleInfo *MMI,
MCStreamer &Streamer) const override;
// The symbol that gets passed to .cfi_personality.
MCSymbol *getCFIPersonalitySymbol(const GlobalValue *GV, Mangler &Mang,
const TargetMachine &TM,
MachineModuleInfo *MMI) const override;
void InitializeELF(bool UseInitArray_);
MCSection *getStaticCtorSection(unsigned Priority,
const MCSymbol *KeySym) const override;
MCSection *getStaticDtorSection(unsigned Priority,
const MCSymbol *KeySym) const override;
const MCExpr *lowerRelativeReference(const GlobalValue *LHS,
const GlobalValue *RHS, Mangler &Mang,
const TargetMachine &TM) const override;
};
class TargetLoweringObjectFileMachO : public TargetLoweringObjectFile {
public:
~TargetLoweringObjectFileMachO() override {}
TargetLoweringObjectFileMachO();
/// Emit the module flags that specify the garbage collection information.
void emitModuleFlags(MCStreamer &Streamer,
ArrayRef<Module::ModuleFlagEntry> ModuleFlags,
Mangler &Mang, const TargetMachine &TM) const override;
MCSection *SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
Mangler &Mang,
const TargetMachine &TM) const override;
MCSection *getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
Mangler &Mang,
const TargetMachine &TM) const override;
MCSection *getSectionForConstant(const DataLayout &DL, SectionKind Kind,
const Constant *C,
unsigned &Align) const override;
/// The mach-o version of this method defaults to returning a stub reference.
const MCExpr *
getTTypeGlobalReference(const GlobalValue *GV, unsigned Encoding,
Mangler &Mang, const TargetMachine &TM,
MachineModuleInfo *MMI,
MCStreamer &Streamer) const override;
// The symbol that gets passed to .cfi_personality.
MCSymbol *getCFIPersonalitySymbol(const GlobalValue *GV, Mangler &Mang,
const TargetMachine &TM,
MachineModuleInfo *MMI) const override;
/// Get MachO PC relative GOT entry relocation
const MCExpr *getIndirectSymViaGOTPCRel(const MCSymbol *Sym,
const MCValue &MV, int64_t Offset,
MachineModuleInfo *MMI,
MCStreamer &Streamer) const override;
void getNameWithPrefix(SmallVectorImpl<char> &OutName, const GlobalValue *GV,
Mangler &Mang, const TargetMachine &TM) const override;
};
class TargetLoweringObjectFileCOFF : public TargetLoweringObjectFile {
mutable unsigned NextUniqueID = 0;
public:
~TargetLoweringObjectFileCOFF() override {}
MCSection *getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
Mangler &Mang,
const TargetMachine &TM) const override;
MCSection *SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
Mangler &Mang,
const TargetMachine &TM) const override;
void getNameWithPrefix(SmallVectorImpl<char> &OutName, const GlobalValue *GV,
Mangler &Mang, const TargetMachine &TM) const override;
MCSection *getSectionForJumpTable(const Function &F, Mangler &Mang,
const TargetMachine &TM) const override;
/// Emit Obj-C garbage collection and linker options. Only linker option
/// emission is implemented for COFF.
void emitModuleFlags(MCStreamer &Streamer,
ArrayRef<Module::ModuleFlagEntry> ModuleFlags,
Mangler &Mang, const TargetMachine &TM) const override;
MCSection *getStaticCtorSection(unsigned Priority,
const MCSymbol *KeySym) const override;
MCSection *getStaticDtorSection(unsigned Priority,
const MCSymbol *KeySym) const override;
void emitLinkerFlagsForGlobal(raw_ostream &OS, const GlobalValue *GV,
const Mangler &Mang) const override;
};
} // end namespace llvm
#endif
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