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 virtual void emitPersonalityValue(MCStreamer &Streamer,
42 const TargetMachine &TM,
43 const MCSymbol *Sym) const;
45 /// getSectionForConstant - Given a constant with the SectionKind, return a
46 /// section that it should be placed in.
47 virtual const MCSection *getSectionForConstant(SectionKind Kind) const;
50 virtual const MCSection *
51 getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
52 Mangler *Mang, const TargetMachine &TM) const;
54 virtual const MCSection *
55 SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
56 Mangler *Mang, const TargetMachine &TM) const;
58 /// getTTypeGlobalReference - Return an MCExpr to use for a reference to the
59 /// specified type info global variable from exception handling information.
60 virtual const MCExpr *
61 getTTypeGlobalReference(const GlobalValue *GV, Mangler *Mang,
62 MachineModuleInfo *MMI, unsigned Encoding,
63 MCStreamer &Streamer) const;
65 // getCFIPersonalitySymbol - The symbol that gets passed to .cfi_personality.
67 getCFIPersonalitySymbol(const GlobalValue *GV, Mangler *Mang,
68 MachineModuleInfo *MMI) const;
70 void InitializeELF(bool UseInitArray_);
71 virtual const MCSection *
72 getStaticCtorSection(unsigned Priority = 65535) const;
73 virtual const MCSection *
74 getStaticDtorSection(unsigned Priority = 65535) const;
76 /// \brief Describe a TLS variable address within debug info.
77 virtual const MCSymbolRefExpr *getDebugThreadLocalSymbol(const MCSymbol *Sym) const;
82 class TargetLoweringObjectFileMachO : public TargetLoweringObjectFile {
84 virtual ~TargetLoweringObjectFileMachO() {}
86 /// emitModuleFlags - Emit the module flags that specify the garbage
87 /// collection information.
88 virtual void emitModuleFlags(MCStreamer &Streamer,
89 ArrayRef<Module::ModuleFlagEntry> ModuleFlags,
90 Mangler *Mang, const TargetMachine &TM) const;
92 virtual const MCSection *
93 SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
94 Mangler *Mang, const TargetMachine &TM) const;
96 virtual const MCSection *
97 getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
98 Mangler *Mang, const TargetMachine &TM) const;
100 virtual const MCSection *getSectionForConstant(SectionKind Kind) const;
102 /// shouldEmitUsedDirectiveFor - This hook allows targets to selectively
103 /// decide not to emit the UsedDirective for some symbols in llvm.used.
104 /// FIXME: REMOVE this (rdar://7071300)
105 virtual bool shouldEmitUsedDirectiveFor(const GlobalValue *GV,
108 /// getTTypeGlobalReference - The mach-o version of this method
109 /// defaults to returning a stub reference.
110 virtual const MCExpr *
111 getTTypeGlobalReference(const GlobalValue *GV, Mangler *Mang,
112 MachineModuleInfo *MMI, unsigned Encoding,
113 MCStreamer &Streamer) const;
115 // getCFIPersonalitySymbol - The symbol that gets passed to .cfi_personality.
117 getCFIPersonalitySymbol(const GlobalValue *GV, Mangler *Mang,
118 MachineModuleInfo *MMI) const;
123 class TargetLoweringObjectFileCOFF : public TargetLoweringObjectFile {
125 virtual ~TargetLoweringObjectFileCOFF() {}
127 virtual const MCSection *
128 getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
129 Mangler *Mang, const TargetMachine &TM) const;
131 virtual const MCSection *
132 SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
133 Mangler *Mang, const TargetMachine &TM) const;
135 /// emitModuleFlags - Emit Obj-C garbage collection and linker options. Only
136 /// linker option emission is implemented for COFF.
137 virtual void emitModuleFlags(MCStreamer &Streamer,
138 ArrayRef<Module::ModuleFlagEntry> ModuleFlags,
139 Mangler *Mang, const TargetMachine &TM) const;
142 } // end namespace llvm