/usr/include/llvm-3.4/llvm/Target/TargetLoweringObjectFile.h is in llvm-3.4-dev 1:3.4-1ubuntu3~precise2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 | //===-- llvm/Target/TargetLoweringObjectFile.h - Object Info ----*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements classes used to handle lowerings specific to common
// object file formats.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_TARGET_TARGETLOWERINGOBJECTFILE_H
#define LLVM_TARGET_TARGETLOWERINGOBJECTFILE_H
#include "llvm/ADT/ArrayRef.h"
#include "llvm/IR/Module.h"
#include "llvm/MC/MCObjectFileInfo.h"
#include "llvm/MC/SectionKind.h"
namespace llvm {
class MachineModuleInfo;
class Mangler;
class MCContext;
class MCExpr;
class MCSection;
class MCSymbol;
class MCSymbolRefExpr;
class MCStreamer;
class GlobalValue;
class TargetMachine;
class TargetLoweringObjectFile : public MCObjectFileInfo {
MCContext *Ctx;
TargetLoweringObjectFile(
const TargetLoweringObjectFile&) LLVM_DELETED_FUNCTION;
void operator=(const TargetLoweringObjectFile&) LLVM_DELETED_FUNCTION;
public:
MCContext &getContext() const { return *Ctx; }
TargetLoweringObjectFile() : MCObjectFileInfo(), Ctx(0) {}
virtual ~TargetLoweringObjectFile();
/// Initialize - this method must be called before any actual lowering is
/// done. This specifies the current context for codegen, and gives the
/// lowering implementations a chance to set up their default sections.
virtual void Initialize(MCContext &ctx, const TargetMachine &TM);
virtual void emitPersonalityValue(MCStreamer &Streamer,
const TargetMachine &TM,
const MCSymbol *Sym) const;
/// emitModuleFlags - Emit the module flags that the platform cares about.
virtual void emitModuleFlags(MCStreamer &,
ArrayRef<Module::ModuleFlagEntry>,
Mangler *, const TargetMachine &) const {
}
/// shouldEmitUsedDirectiveFor - This hook allows targets to selectively
/// decide not to emit the UsedDirective for some symbols in llvm.used.
/// FIXME: REMOVE this (rdar://7071300)
virtual bool shouldEmitUsedDirectiveFor(const GlobalValue *GV,
Mangler *) const {
return GV != 0;
}
/// getSectionForConstant - Given a constant with the SectionKind, return a
/// section that it should be placed in.
virtual const MCSection *getSectionForConstant(SectionKind Kind) const;
/// getKindForGlobal - Classify the specified global variable into a set of
/// target independent categories embodied in SectionKind.
static SectionKind getKindForGlobal(const GlobalValue *GV,
const TargetMachine &TM);
/// SectionForGlobal - This method computes the appropriate section to emit
/// the specified global variable or function definition. This should not
/// be passed external (or available externally) globals.
const MCSection *SectionForGlobal(const GlobalValue *GV,
SectionKind Kind, Mangler *Mang,
const TargetMachine &TM) const;
/// SectionForGlobal - This method computes the appropriate section to emit
/// the specified global variable or function definition. This should not
/// be passed external (or available externally) globals.
const MCSection *SectionForGlobal(const GlobalValue *GV,
Mangler *Mang,
const TargetMachine &TM) const {
return SectionForGlobal(GV, getKindForGlobal(GV, TM), Mang, TM);
}
/// getExplicitSectionGlobal - Targets should implement this method to assign
/// a section to globals with an explicit section specfied. The
/// implementation of this method can assume that GV->hasSection() is true.
virtual const MCSection *
getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
Mangler *Mang, const TargetMachine &TM) const = 0;
/// getSpecialCasedSectionGlobals - Allow the target to completely override
/// section assignment of a global.
virtual const MCSection *
getSpecialCasedSectionGlobals(const GlobalValue *GV, Mangler *Mang,
SectionKind Kind) const {
return 0;
}
/// getTTypeGlobalReference - Return an MCExpr to use for a reference
/// to the specified global variable from exception handling information.
///
virtual const MCExpr *
getTTypeGlobalReference(const GlobalValue *GV, Mangler *Mang,
MachineModuleInfo *MMI, unsigned Encoding,
MCStreamer &Streamer) const;
/// Return the MCSymbol for the specified global value. This symbol is the
/// main label that is the address of the global
MCSymbol *getSymbol(Mangler &M, const GlobalValue *GV) const;
// getCFIPersonalitySymbol - The symbol that gets passed to .cfi_personality.
virtual MCSymbol *
getCFIPersonalitySymbol(const GlobalValue *GV, Mangler *Mang,
MachineModuleInfo *MMI) const;
///
const MCExpr *
getTTypeReference(const MCSymbolRefExpr *Sym, unsigned Encoding,
MCStreamer &Streamer) const;
virtual const MCSection *
getStaticCtorSection(unsigned Priority = 65535) const {
(void)Priority;
return StaticCtorSection;
}
virtual const MCSection *
getStaticDtorSection(unsigned Priority = 65535) const {
(void)Priority;
return StaticDtorSection;
}
/// \brief Create a symbol reference to describe the given TLS variable when
/// emitting the address in debug info.
virtual const MCExpr *getDebugThreadLocalSymbol(const MCSymbol *Sym) const;
protected:
virtual const MCSection *
SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
Mangler *Mang, const TargetMachine &TM) const;
};
} // end namespace llvm
#endif
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