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 LLVM_OVERRIDE;
44 /// Given a constant with the SectionKind, return a section that it should be
46 const MCSection *getSectionForConstant(SectionKind Kind) const LLVM_OVERRIDE;
48 const MCSection *getExplicitSectionGlobal(const GlobalValue *GV,
49 SectionKind Kind, Mangler &Mang,
50 const TargetMachine &TM) const
53 const MCSection *SelectSectionForGlobal(const GlobalValue *GV,
54 SectionKind Kind, Mangler &Mang,
55 const TargetMachine &TM) const
58 /// Return an MCExpr to use for a reference to the specified type info global
59 /// variable from exception handling information.
60 const MCExpr *getTTypeGlobalReference(const GlobalValue *GV, Mangler &Mang,
61 MachineModuleInfo *MMI,
63 MCStreamer &Streamer) const
66 // The symbol that gets passed to .cfi_personality.
67 MCSymbol *getCFIPersonalitySymbol(const GlobalValue *GV, Mangler &Mang,
68 MachineModuleInfo *MMI) const LLVM_OVERRIDE;
70 void InitializeELF(bool UseInitArray_);
71 const MCSection *getStaticCtorSection(unsigned Priority = 65535) const
73 const MCSection *getStaticDtorSection(unsigned Priority = 65535) const
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 LLVM_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
93 const MCSection *SelectSectionForGlobal(const GlobalValue *GV,
94 SectionKind Kind, Mangler &Mang,
95 const TargetMachine &TM) const
98 const MCSection *getExplicitSectionGlobal(const GlobalValue *GV,
99 SectionKind Kind, Mangler &Mang,
100 const TargetMachine &TM) const
103 const MCSection *getSectionForConstant(SectionKind Kind) const LLVM_OVERRIDE;
105 /// This hook allows targets to selectively decide not to emit the
106 /// UsedDirective for some symbols in llvm.used.
107 /// FIXME: REMOVE this (rdar://7071300)
108 bool shouldEmitUsedDirectiveFor(const GlobalValue *GV, Mangler &Mang) const
111 /// The mach-o version of this method defaults to returning a stub reference.
112 const MCExpr *getTTypeGlobalReference(const GlobalValue *GV, Mangler &Mang,
113 MachineModuleInfo *MMI,
115 MCStreamer &Streamer) const
118 // The symbol that gets passed to .cfi_personality.
119 MCSymbol *getCFIPersonalitySymbol(const GlobalValue *GV, Mangler &Mang,
120 MachineModuleInfo *MMI) const LLVM_OVERRIDE;
125 class TargetLoweringObjectFileCOFF : public TargetLoweringObjectFile {
127 virtual ~TargetLoweringObjectFileCOFF() {}
129 const MCSection *getExplicitSectionGlobal(const GlobalValue *GV,
130 SectionKind Kind, Mangler &Mang,
131 const TargetMachine &TM) const
134 const MCSection *SelectSectionForGlobal(const GlobalValue *GV,
135 SectionKind Kind, Mangler &Mang,
136 const TargetMachine &TM) const
139 /// Extract the dependent library name from a linker option string. Returns
140 /// StringRef() if the option does not specify a library.
141 StringRef getDepLibFromLinkerOpt(StringRef LinkerOption) const LLVM_OVERRIDE;
143 /// Emit Obj-C garbage collection and linker options. Only linker option
144 /// emission is implemented for COFF.
145 void emitModuleFlags(MCStreamer &Streamer,
146 ArrayRef<Module::ModuleFlagEntry> ModuleFlags,
147 Mangler &Mang, const TargetMachine &TM) const
151 } // end namespace llvm