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 TargetLoweringObjectFileELF() : UseInitArray(false) {}
41 virtual ~TargetLoweringObjectFileELF() {}
43 void emitPersonalityValue(MCStreamer &Streamer, const TargetMachine &TM,
44 const MCSymbol *Sym) const override;
46 /// Given a constant with the SectionKind, return a section that it should be
48 const MCSection *getSectionForConstant(SectionKind Kind,
49 const Constant *C) const override;
51 const MCSection *getExplicitSectionGlobal(const GlobalValue *GV,
52 SectionKind Kind, Mangler &Mang,
53 const TargetMachine &TM) const override;
55 const MCSection *SelectSectionForGlobal(const GlobalValue *GV,
56 SectionKind Kind, Mangler &Mang,
57 const TargetMachine &TM) const override;
60 getSectionForJumpTable(const Function &F, Mangler &Mang,
61 const TargetMachine &TM) const override;
63 bool shouldPutJumpTableInFunctionSection(bool UsesLabelDifference,
64 const Function &F) const override;
66 /// Return an MCExpr to use for a reference to the specified type info global
67 /// variable from exception handling information.
69 getTTypeGlobalReference(const GlobalValue *GV, unsigned Encoding,
70 Mangler &Mang, const TargetMachine &TM,
71 MachineModuleInfo *MMI,
72 MCStreamer &Streamer) const override;
74 // The symbol that gets passed to .cfi_personality.
75 MCSymbol *getCFIPersonalitySymbol(const GlobalValue *GV, Mangler &Mang,
76 const TargetMachine &TM,
77 MachineModuleInfo *MMI) const override;
79 void InitializeELF(bool UseInitArray_);
80 const MCSection *getStaticCtorSection(unsigned Priority,
81 const MCSymbol *KeySym) const override;
82 const MCSection *getStaticDtorSection(unsigned Priority,
83 const MCSymbol *KeySym) const override;
88 class TargetLoweringObjectFileMachO : public TargetLoweringObjectFile {
90 virtual ~TargetLoweringObjectFileMachO() {}
92 /// Extract the dependent library name from a linker option string. Returns
93 /// StringRef() if the option does not specify a library.
94 StringRef getDepLibFromLinkerOpt(StringRef LinkerOption) const override;
96 /// Emit the module flags that specify the garbage collection information.
97 void emitModuleFlags(MCStreamer &Streamer,
98 ArrayRef<Module::ModuleFlagEntry> ModuleFlags,
99 Mangler &Mang, const TargetMachine &TM) const override;
102 SelectSectionForGlobal(const GlobalValue *GV,
103 SectionKind Kind, Mangler &Mang,
104 const TargetMachine &TM) const override;
107 getExplicitSectionGlobal(const GlobalValue *GV,
108 SectionKind Kind, Mangler &Mang,
109 const TargetMachine &TM) const override;
111 const MCSection *getSectionForConstant(SectionKind Kind,
112 const Constant *C) const override;
114 /// The mach-o version of this method defaults to returning a stub reference.
116 getTTypeGlobalReference(const GlobalValue *GV, unsigned Encoding,
117 Mangler &Mang, const TargetMachine &TM,
118 MachineModuleInfo *MMI,
119 MCStreamer &Streamer) const override;
121 // The symbol that gets passed to .cfi_personality.
122 MCSymbol *getCFIPersonalitySymbol(const GlobalValue *GV, Mangler &Mang,
123 const TargetMachine &TM,
124 MachineModuleInfo *MMI) const override;
129 class TargetLoweringObjectFileCOFF : public TargetLoweringObjectFile {
131 virtual ~TargetLoweringObjectFileCOFF() {}
134 getExplicitSectionGlobal(const GlobalValue *GV,
135 SectionKind Kind, Mangler &Mang,
136 const TargetMachine &TM) const override;
139 SelectSectionForGlobal(const GlobalValue *GV,
140 SectionKind Kind, Mangler &Mang,
141 const TargetMachine &TM) const override;
143 /// Extract the dependent library name from a linker option string. Returns
144 /// StringRef() if the option does not specify a library.
145 StringRef getDepLibFromLinkerOpt(StringRef LinkerOption) const override;
147 /// Emit Obj-C garbage collection and linker options. Only linker option
148 /// emission is implemented for COFF.
149 void emitModuleFlags(MCStreamer &Streamer,
150 ArrayRef<Module::ModuleFlagEntry> ModuleFlags,
151 Mangler &Mang, const TargetMachine &TM) const override;
153 const MCSection *getStaticCtorSection(unsigned Priority,
154 const MCSymbol *KeySym) const override;
155 const MCSection *getStaticDtorSection(unsigned Priority,
156 const MCSymbol *KeySym) const override;
159 } // end namespace llvm