| //===- lib/MC/MCNullStreamer.cpp - Dummy Streamer Implementation ----------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/MC/MCStreamer.h" |
| |
| #include "llvm/MC/MCContext.h" |
| #include "llvm/MC/MCInst.h" |
| #include "llvm/MC/MCSectionMachO.h" |
| #include "llvm/MC/MCSymbol.h" |
| |
| using namespace llvm; |
| |
| namespace { |
| |
| class MCNullStreamer : public MCStreamer { |
| public: |
| MCNullStreamer(MCContext &Context) : MCStreamer(Context) {} |
| |
| /// @name MCStreamer Interface |
| /// @{ |
| |
| virtual void InitSections() { |
| } |
| |
| virtual void SwitchSection(const MCSection *Section) { |
| PrevSection = CurSection; |
| CurSection = Section; |
| } |
| |
| virtual void EmitLabel(MCSymbol *Symbol) { |
| assert(Symbol->isUndefined() && "Cannot define a symbol twice!"); |
| assert(CurSection && "Cannot emit before setting section!"); |
| Symbol->setSection(*CurSection); |
| } |
| |
| virtual void EmitAssemblerFlag(MCAssemblerFlag Flag) {} |
| virtual void EmitThumbFunc(MCSymbol *Func) {} |
| |
| virtual void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {} |
| virtual void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol){} |
| virtual void EmitDwarfAdvanceLineAddr(int64_t LineDelta, |
| const MCSymbol *LastLabel, |
| const MCSymbol *Label) {} |
| |
| virtual void EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute){} |
| |
| virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {} |
| |
| virtual void BeginCOFFSymbolDef(const MCSymbol *Symbol) {} |
| virtual void EmitCOFFSymbolStorageClass(int StorageClass) {} |
| virtual void EmitCOFFSymbolType(int Type) {} |
| virtual void EndCOFFSymbolDef() {} |
| |
| virtual void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) {} |
| virtual void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size, |
| unsigned ByteAlignment) {} |
| virtual void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size) {} |
| |
| virtual void EmitZerofill(const MCSection *Section, MCSymbol *Symbol = 0, |
| unsigned Size = 0, unsigned ByteAlignment = 0) {} |
| virtual void EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol, |
| uint64_t Size, unsigned ByteAlignment) {} |
| virtual void EmitBytes(StringRef Data, unsigned AddrSpace) {} |
| |
| virtual void EmitValueImpl(const MCExpr *Value, unsigned Size, |
| bool isPCRel, unsigned AddrSpace) {} |
| virtual void EmitULEB128Value(const MCExpr *Value, |
| unsigned AddrSpace = 0) {} |
| virtual void EmitSLEB128Value(const MCExpr *Value, |
| unsigned AddrSpace = 0) {} |
| virtual void EmitGPRel32Value(const MCExpr *Value) {} |
| virtual void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value = 0, |
| unsigned ValueSize = 1, |
| unsigned MaxBytesToEmit = 0) {} |
| |
| virtual void EmitCodeAlignment(unsigned ByteAlignment, |
| unsigned MaxBytesToEmit = 0) {} |
| |
| virtual void EmitValueToOffset(const MCExpr *Offset, |
| unsigned char Value = 0) {} |
| |
| virtual void EmitFileDirective(StringRef Filename) {} |
| virtual bool EmitDwarfFileDirective(unsigned FileNo,StringRef Filename) { |
| return false; |
| } |
| virtual void EmitDwarfLocDirective(unsigned FileNo, unsigned Line, |
| unsigned Column, unsigned Flags, |
| unsigned Isa, unsigned Discriminator) {} |
| virtual void EmitInstruction(const MCInst &Inst) {} |
| |
| virtual void Finish() {} |
| |
| /// @} |
| }; |
| |
| } |
| |
| MCStreamer *llvm::createNullStreamer(MCContext &Context) { |
| return new MCNullStreamer(Context); |
| } |