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https://github.com/c64scene-ar/llvm-6502.git
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7521964d28
This starts merging MCSection and MCSectionData. There are a few issues with the current split between MCSection and MCSectionData. * It optimizes the the not as important case. We want the production of .o files to be really fast, but the split puts the information used for .o emission in a separate data structure. * The ELF/COFF/MachO hierarchy is not represented in MCSectionData, leading to some ad-hoc ways to represent the various flags. * It makes it harder to remember where each item is. The attached patch starts merging the two by moving the alignment from MCSectionData to MCSection. Most of the patch is actually just dropping 'const', since MCSectionData is mutable, but MCSection was not. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237936 91177308-0d34-0410-b5e6-96231b3b80d8
172 lines
7.0 KiB
C++
172 lines
7.0 KiB
C++
//==-- llvm/CodeGen/TargetLoweringObjectFileImpl.h - Object Info -*- C++ -*-==//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements classes used to handle lowerings specific to common
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// object file formats.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CODEGEN_TARGETLOWERINGOBJECTFILEIMPL_H
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#define LLVM_CODEGEN_TARGETLOWERINGOBJECTFILEIMPL_H
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#include "llvm/ADT/StringRef.h"
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#include "llvm/MC/SectionKind.h"
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#include "llvm/Target/TargetLoweringObjectFile.h"
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namespace llvm {
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class MachineModuleInfo;
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class Mangler;
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class MCAsmInfo;
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class MCExpr;
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class MCSection;
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class MCSectionMachO;
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class MCSymbol;
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class MCContext;
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class GlobalValue;
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class TargetMachine;
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class TargetLoweringObjectFileELF : public TargetLoweringObjectFile {
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bool UseInitArray;
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mutable unsigned NextUniqueID = 0;
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public:
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TargetLoweringObjectFileELF() : UseInitArray(false) {}
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~TargetLoweringObjectFileELF() override {}
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void emitPersonalityValue(MCStreamer &Streamer, const TargetMachine &TM,
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const MCSymbol *Sym) const override;
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/// Given a constant with the SectionKind, return a section that it should be
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/// placed in.
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MCSection *getSectionForConstant(SectionKind Kind,
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const Constant *C) const override;
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MCSection *getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
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Mangler &Mang,
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const TargetMachine &TM) const override;
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MCSection *SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
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Mangler &Mang,
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const TargetMachine &TM) const override;
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MCSection *getSectionForJumpTable(const Function &F, Mangler &Mang,
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const TargetMachine &TM) const override;
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bool shouldPutJumpTableInFunctionSection(bool UsesLabelDifference,
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const Function &F) const override;
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/// Return an MCExpr to use for a reference to the specified type info global
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/// variable from exception handling information.
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const MCExpr *
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getTTypeGlobalReference(const GlobalValue *GV, unsigned Encoding,
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Mangler &Mang, const TargetMachine &TM,
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MachineModuleInfo *MMI,
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MCStreamer &Streamer) const override;
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// The symbol that gets passed to .cfi_personality.
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MCSymbol *getCFIPersonalitySymbol(const GlobalValue *GV, Mangler &Mang,
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const TargetMachine &TM,
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MachineModuleInfo *MMI) const override;
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void InitializeELF(bool UseInitArray_);
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MCSection *getStaticCtorSection(unsigned Priority,
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const MCSymbol *KeySym) const override;
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MCSection *getStaticDtorSection(unsigned Priority,
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const MCSymbol *KeySym) const override;
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};
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class TargetLoweringObjectFileMachO : public TargetLoweringObjectFile {
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public:
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~TargetLoweringObjectFileMachO() override {}
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TargetLoweringObjectFileMachO();
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/// Extract the dependent library name from a linker option string. Returns
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/// StringRef() if the option does not specify a library.
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StringRef getDepLibFromLinkerOpt(StringRef LinkerOption) const override;
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/// Emit the module flags that specify the garbage collection information.
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void emitModuleFlags(MCStreamer &Streamer,
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ArrayRef<Module::ModuleFlagEntry> ModuleFlags,
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Mangler &Mang, const TargetMachine &TM) const override;
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MCSection *SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
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Mangler &Mang,
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const TargetMachine &TM) const override;
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MCSection *getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
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Mangler &Mang,
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const TargetMachine &TM) const override;
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MCSection *getSectionForConstant(SectionKind Kind,
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const Constant *C) const override;
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/// The mach-o version of this method defaults to returning a stub reference.
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const MCExpr *
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getTTypeGlobalReference(const GlobalValue *GV, unsigned Encoding,
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Mangler &Mang, const TargetMachine &TM,
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MachineModuleInfo *MMI,
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MCStreamer &Streamer) const override;
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// The symbol that gets passed to .cfi_personality.
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MCSymbol *getCFIPersonalitySymbol(const GlobalValue *GV, Mangler &Mang,
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const TargetMachine &TM,
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MachineModuleInfo *MMI) const override;
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/// Get MachO PC relative GOT entry relocation
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const MCExpr *getIndirectSymViaGOTPCRel(const MCSymbol *Sym,
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const MCValue &MV, int64_t Offset,
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MachineModuleInfo *MMI,
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MCStreamer &Streamer) const override;
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};
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class TargetLoweringObjectFileCOFF : public TargetLoweringObjectFile {
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public:
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~TargetLoweringObjectFileCOFF() override {}
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MCSection *getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
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Mangler &Mang,
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const TargetMachine &TM) const override;
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MCSection *SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
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Mangler &Mang,
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const TargetMachine &TM) const override;
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void getNameWithPrefix(SmallVectorImpl<char> &OutName, const GlobalValue *GV,
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bool CannotUsePrivateLabel, Mangler &Mang,
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const TargetMachine &TM) const override;
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MCSection *getSectionForJumpTable(const Function &F, Mangler &Mang,
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const TargetMachine &TM) const override;
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/// Extract the dependent library name from a linker option string. Returns
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/// StringRef() if the option does not specify a library.
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StringRef getDepLibFromLinkerOpt(StringRef LinkerOption) const override;
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/// Emit Obj-C garbage collection and linker options. Only linker option
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/// emission is implemented for COFF.
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void emitModuleFlags(MCStreamer &Streamer,
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ArrayRef<Module::ModuleFlagEntry> ModuleFlags,
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Mangler &Mang, const TargetMachine &TM) const override;
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MCSection *getStaticCtorSection(unsigned Priority,
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const MCSymbol *KeySym) const override;
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MCSection *getStaticDtorSection(unsigned Priority,
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const MCSymbol *KeySym) const override;
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};
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} // end namespace llvm
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#endif
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