1 //==-- llvm/CodeGen/TargetLoweringObjectFileImpl.h - Object Info -*- C++ -*-==// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file implements classes used to handle lowerings specific to common 11 // object file formats. 12 // 13 //===----------------------------------------------------------------------===// 14 15 #ifndef LLVM_CODEGEN_TARGETLOWERINGOBJECTFILEIMPL_H 16 #define LLVM_CODEGEN_TARGETLOWERINGOBJECTFILEIMPL_H 17 18 #include "llvm/ADT/StringRef.h" 19 #include "llvm/MC/SectionKind.h" 20 #include "llvm/Target/TargetLoweringObjectFile.h" 21 22 namespace llvm { 23 class MachineModuleInfo; 24 class Mangler; 25 class MCAsmInfo; 26 class MCExpr; 27 class MCSection; 28 class MCSectionMachO; 29 class MCSymbol; 30 class MCContext; 31 class GlobalValue; 32 class TargetMachine; 33 34 35 class TargetLoweringObjectFileELF : public TargetLoweringObjectFile { 36 bool UseInitArray; 37 38 public: 39 virtual ~TargetLoweringObjectFileELF() {} 40 41 virtual void emitPersonalityValue(MCStreamer &Streamer, 42 const TargetMachine &TM, 43 const MCSymbol *Sym) const; 44 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; 48 49 50 virtual const MCSection * 51 getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind, 52 Mangler *Mang, const TargetMachine &TM) const; 53 54 virtual const MCSection * 55 SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind, 56 Mangler *Mang, const TargetMachine &TM) const; 57 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; 64 65 // getCFIPersonalitySymbol - The symbol that gets passed to .cfi_personality. 66 virtual MCSymbol * 67 getCFIPersonalitySymbol(const GlobalValue *GV, Mangler *Mang, 68 MachineModuleInfo *MMI) const; 69 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; 75 }; 76 77 78 79 class TargetLoweringObjectFileMachO : public TargetLoweringObjectFile { 80 public: 81 virtual ~TargetLoweringObjectFileMachO() {} 82 83 /// emitModuleFlags - Emit the module flags that specify the garbage 84 /// collection information. 85 virtual void emitModuleFlags(MCStreamer &Streamer, 86 ArrayRef<Module::ModuleFlagEntry> ModuleFlags, 87 Mangler *Mang, const TargetMachine &TM) const; 88 89 virtual const MCSection * 90 SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind, 91 Mangler *Mang, const TargetMachine &TM) const; 92 93 virtual const MCSection * 94 getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind, 95 Mangler *Mang, const TargetMachine &TM) const; 96 97 virtual const MCSection *getSectionForConstant(SectionKind Kind) const; 98 99 /// shouldEmitUsedDirectiveFor - This hook allows targets to selectively 100 /// decide not to emit the UsedDirective for some symbols in llvm.used. 101 /// FIXME: REMOVE this (rdar://7071300) 102 virtual bool shouldEmitUsedDirectiveFor(const GlobalValue *GV, 103 Mangler *) const; 104 105 /// getTTypeGlobalReference - The mach-o version of this method 106 /// defaults to returning a stub reference. 107 virtual const MCExpr * 108 getTTypeGlobalReference(const GlobalValue *GV, Mangler *Mang, 109 MachineModuleInfo *MMI, unsigned Encoding, 110 MCStreamer &Streamer) const; 111 112 // getCFIPersonalitySymbol - The symbol that gets passed to .cfi_personality. 113 virtual MCSymbol * 114 getCFIPersonalitySymbol(const GlobalValue *GV, Mangler *Mang, 115 MachineModuleInfo *MMI) const; 116 }; 117 118 119 120 class TargetLoweringObjectFileCOFF : public TargetLoweringObjectFile { 121 public: 122 virtual ~TargetLoweringObjectFileCOFF() {} 123 124 virtual const MCSection * 125 getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind, 126 Mangler *Mang, const TargetMachine &TM) const; 127 128 virtual const MCSection * 129 SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind, 130 Mangler *Mang, const TargetMachine &TM) const; 131 132 /// emitModuleFlags - Emit Obj-C garbage collection and linker options. Only 133 /// linker option emission is implemented for COFF. 134 virtual void emitModuleFlags(MCStreamer &Streamer, 135 ArrayRef<Module::ModuleFlagEntry> ModuleFlags, 136 Mangler *Mang, const TargetMachine &TM) const; 137 }; 138 139 } // end namespace llvm 140 141 #endif 142
