1 //==-- llvm/CodeGen/TargetLoweringObjectFileImpl.h - Object Info -*- C++ -*-==//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements classes used to handle lowerings specific to common
11 // object file formats.
13 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_CODEGEN_TARGETLOWERINGOBJECTFILEIMPL_H
16 #define LLVM_CODEGEN_TARGETLOWERINGOBJECTFILEIMPL_H
18 #include "llvm/ADT/StringRef.h"
19 #include "llvm/MC/SectionKind.h"
20 #include "llvm/Target/TargetLoweringObjectFile.h"
23 class MachineModuleInfo;
35 class TargetLoweringObjectFileELF : public TargetLoweringObjectFile {
39 virtual ~TargetLoweringObjectFileELF() {}
41 void emitPersonalityValue(MCStreamer &Streamer, const TargetMachine &TM,
42 const MCSymbol *Sym) const override;
44 /// Given a constant with the SectionKind, return a section that it should be
46 const MCSection *getSectionForConstant(SectionKind Kind,
47 const Constant *C) const override;
49 const MCSection *getExplicitSectionGlobal(const GlobalValue *GV,
50 SectionKind Kind, Mangler &Mang,
51 const TargetMachine &TM) const override;
53 const MCSection *SelectSectionForGlobal(const GlobalValue *GV,
54 SectionKind Kind, Mangler &Mang,
55 const TargetMachine &TM) const override;
57 /// Return an MCExpr to use for a reference to the specified type info global
58 /// variable from exception handling information.
60 getTTypeGlobalReference(const GlobalValue *GV, unsigned Encoding,
61 Mangler &Mang, const TargetMachine &TM,
62 MachineModuleInfo *MMI,
63 MCStreamer &Streamer) const override;
65 // The symbol that gets passed to .cfi_personality.
66 MCSymbol *getCFIPersonalitySymbol(const GlobalValue *GV, Mangler &Mang,
67 const TargetMachine &TM,
68 MachineModuleInfo *MMI) const override;
70 void InitializeELF(bool UseInitArray_);
71 const MCSection *getStaticCtorSection(unsigned Priority,
72 const MCSymbol *KeySym) const override;
73 const MCSection *getStaticDtorSection(unsigned Priority,
74 const MCSymbol *KeySym) const override;
79 class TargetLoweringObjectFileMachO : public TargetLoweringObjectFile {
81 virtual ~TargetLoweringObjectFileMachO() {}
83 /// Extract the dependent library name from a linker option string. Returns
84 /// StringRef() if the option does not specify a library.
85 StringRef getDepLibFromLinkerOpt(StringRef LinkerOption) const override;
87 /// Emit the module flags that specify the garbage collection information.
88 void emitModuleFlags(MCStreamer &Streamer,
89 ArrayRef<Module::ModuleFlagEntry> ModuleFlags,
90 Mangler &Mang, const TargetMachine &TM) const override;
92 bool isSectionAtomizableBySymbols(const MCSection &Section) const override;
95 SelectSectionForGlobal(const GlobalValue *GV,
96 SectionKind Kind, Mangler &Mang,
97 const TargetMachine &TM) const override;
100 getExplicitSectionGlobal(const GlobalValue *GV,
101 SectionKind Kind, Mangler &Mang,
102 const TargetMachine &TM) const override;
104 const MCSection *getSectionForConstant(SectionKind Kind,
105 const Constant *C) const override;
107 /// The mach-o version of this method defaults to returning a stub reference.
109 getTTypeGlobalReference(const GlobalValue *GV, unsigned Encoding,
110 Mangler &Mang, const TargetMachine &TM,
111 MachineModuleInfo *MMI,
112 MCStreamer &Streamer) const override;
114 // The symbol that gets passed to .cfi_personality.
115 MCSymbol *getCFIPersonalitySymbol(const GlobalValue *GV, Mangler &Mang,
116 const TargetMachine &TM,
117 MachineModuleInfo *MMI) const override;
122 class TargetLoweringObjectFileCOFF : public TargetLoweringObjectFile {
124 virtual ~TargetLoweringObjectFileCOFF() {}
127 getExplicitSectionGlobal(const GlobalValue *GV,
128 SectionKind Kind, Mangler &Mang,
129 const TargetMachine &TM) const override;
132 SelectSectionForGlobal(const GlobalValue *GV,
133 SectionKind Kind, Mangler &Mang,
134 const TargetMachine &TM) const override;
136 /// Extract the dependent library name from a linker option string. Returns
137 /// StringRef() if the option does not specify a library.
138 StringRef getDepLibFromLinkerOpt(StringRef LinkerOption) const override;
140 /// Emit Obj-C garbage collection and linker options. Only linker option
141 /// emission is implemented for COFF.
142 void emitModuleFlags(MCStreamer &Streamer,
143 ArrayRef<Module::ModuleFlagEntry> ModuleFlags,
144 Mangler &Mang, const TargetMachine &TM) const override;
146 const MCSection *getStaticCtorSection(unsigned Priority,
147 const MCSymbol *KeySym) const override;
148 const MCSection *getStaticDtorSection(unsigned Priority,
149 const MCSymbol *KeySym) const override;
152 } // end namespace llvm