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Diffstat (limited to 'include/llvm/CodeGen/TargetLoweringObjectFileImpl.h')
| -rw-r--r-- | include/llvm/CodeGen/TargetLoweringObjectFileImpl.h | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/include/llvm/CodeGen/TargetLoweringObjectFileImpl.h b/include/llvm/CodeGen/TargetLoweringObjectFileImpl.h new file mode 100644 index 0000000..3d99fa7 --- /dev/null +++ b/include/llvm/CodeGen/TargetLoweringObjectFileImpl.h @@ -0,0 +1,207 @@ +//==-- llvm/CodeGen/TargetLoweringObjectFileImpl.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_CODEGEN_TARGETLOWERINGOBJECTFILEIMPL_H +#define LLVM_CODEGEN_TARGETLOWERINGOBJECTFILEIMPL_H + +#include "llvm/ADT/StringRef.h" +#include "llvm/MC/SectionKind.h" +#include "llvm/Target/TargetLoweringObjectFile.h" + +namespace llvm { + class MachineModuleInfo; + class Mangler; + class MCAsmInfo; + class MCExpr; + class MCSection; + class MCSectionMachO; + class MCSymbol; + class MCContext; + class GlobalValue; + class TargetMachine; + + +class TargetLoweringObjectFileELF : public TargetLoweringObjectFile { + mutable void *UniquingMap; +protected: + /// TLSDataSection - Section directive for Thread Local data. + /// + const MCSection *TLSDataSection; // Defaults to ".tdata". + + /// TLSBSSSection - Section directive for Thread Local uninitialized data. + /// Null if this target doesn't support a BSS section. + /// + const MCSection *TLSBSSSection; // Defaults to ".tbss". + + const MCSection *DataRelSection; + const MCSection *DataRelLocalSection; + const MCSection *DataRelROSection; + const MCSection *DataRelROLocalSection; + + const MCSection *MergeableConst4Section; + const MCSection *MergeableConst8Section; + const MCSection *MergeableConst16Section; + +protected: + const MCSection *getELFSection(StringRef Section, unsigned Type, + unsigned Flags, SectionKind Kind, + bool IsExplicit = false) const; +public: + TargetLoweringObjectFileELF() : UniquingMap(0) {} + ~TargetLoweringObjectFileELF(); + + virtual void Initialize(MCContext &Ctx, const TargetMachine &TM); + + const MCSection *getDataRelSection() const { return DataRelSection; } + + /// getSectionForConstant - Given a constant with the SectionKind, return a + /// section that it should be placed in. + virtual const MCSection *getSectionForConstant(SectionKind Kind) const; + + + virtual const MCSection * + getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind, + Mangler *Mang, const TargetMachine &TM) const; + + virtual const MCSection * + SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind, + Mangler *Mang, const TargetMachine &TM) const; + + /// getSymbolForDwarfGlobalReference - Return an MCExpr to use for a reference + /// to the specified global variable from exception handling information. + /// + virtual const MCExpr * + getSymbolForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang, + MachineModuleInfo *MMI, unsigned Encoding) const; +}; + + + +class TargetLoweringObjectFileMachO : public TargetLoweringObjectFile { + mutable void *UniquingMap; + + const MCSection *CStringSection; + const MCSection *UStringSection; + const MCSection *TextCoalSection; + const MCSection *ConstTextCoalSection; + const MCSection *ConstDataCoalSection; + const MCSection *ConstDataSection; + const MCSection *DataCoalSection; + const MCSection *DataCommonSection; + const MCSection *DataBSSSection; + const MCSection *FourByteConstantSection; + const MCSection *EightByteConstantSection; + const MCSection *SixteenByteConstantSection; + + const MCSection *LazySymbolPointerSection; + const MCSection *NonLazySymbolPointerSection; +public: + TargetLoweringObjectFileMachO() : UniquingMap(0) {} + ~TargetLoweringObjectFileMachO(); + + virtual void Initialize(MCContext &Ctx, const TargetMachine &TM); + + virtual const MCSection * + SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind, + Mangler *Mang, const TargetMachine &TM) const; + + virtual const MCSection * + getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind, + Mangler *Mang, const TargetMachine &TM) const; + + virtual const MCSection *getSectionForConstant(SectionKind Kind) 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; + + /// getMachOSection - Return the MCSection for the specified mach-o section. + /// This requires the operands to be valid. + const MCSectionMachO *getMachOSection(StringRef Segment, + StringRef Section, + unsigned TypeAndAttributes, + SectionKind K) const { + return getMachOSection(Segment, Section, TypeAndAttributes, 0, K); + } + const MCSectionMachO *getMachOSection(StringRef Segment, + StringRef Section, + unsigned TypeAndAttributes, + unsigned Reserved2, + SectionKind K) const; + + /// getTextCoalSection - Return the "__TEXT,__textcoal_nt" section we put weak + /// text symbols into. + const MCSection *getTextCoalSection() const { + return TextCoalSection; + } + + /// getConstTextCoalSection - Return the "__TEXT,__const_coal" section + /// we put weak read-only symbols into. + const MCSection *getConstTextCoalSection() const { + return ConstTextCoalSection; + } + + /// getLazySymbolPointerSection - Return the section corresponding to + /// the .lazy_symbol_pointer directive. + const MCSection *getLazySymbolPointerSection() const { + return LazySymbolPointerSection; + } + + /// getNonLazySymbolPointerSection - Return the section corresponding to + /// the .non_lazy_symbol_pointer directive. + const MCSection *getNonLazySymbolPointerSection() const { + return NonLazySymbolPointerSection; + } + + /// getSymbolForDwarfGlobalReference - The mach-o version of this method + /// defaults to returning a stub reference. + virtual const MCExpr * + getSymbolForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang, + MachineModuleInfo *MMI, unsigned Encoding) const; + + virtual unsigned getPersonalityEncoding() const; + virtual unsigned getLSDAEncoding() const; + virtual unsigned getFDEEncoding() const; + virtual unsigned getTTypeEncoding() const; +}; + + + +class TargetLoweringObjectFileCOFF : public TargetLoweringObjectFile { + mutable void *UniquingMap; +public: + TargetLoweringObjectFileCOFF() : UniquingMap(0) {} + ~TargetLoweringObjectFileCOFF(); + + virtual void Initialize(MCContext &Ctx, const TargetMachine &TM); + + virtual const MCSection * + getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind, + Mangler *Mang, const TargetMachine &TM) const; + + virtual const MCSection * + SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind, + Mangler *Mang, const TargetMachine &TM) const; + + /// getCOFFSection - Return the MCSection for the specified COFF section. + /// FIXME: Switch this to a semantic view eventually. + const MCSection *getCOFFSection(StringRef Name, bool isDirective, + SectionKind K) const; +}; + +} // end namespace llvm + +#endif |