| //===- 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 |
| /// @{ |
| |
| void ChangeSection(const MCSection *Section, |
| const MCExpr *Subsection) override { |
| } |
| |
| void EmitLabel(MCSymbol *Symbol) override { |
| assert(Symbol->isUndefined() && "Cannot define a symbol twice!"); |
| assert(getCurrentSection().first &&"Cannot emit before setting section!"); |
| AssignSection(Symbol, getCurrentSection().first); |
| } |
| void EmitDebugLabel(MCSymbol *Symbol) override { |
| EmitLabel(Symbol); |
| } |
| void EmitAssemblerFlag(MCAssemblerFlag Flag) override {} |
| void EmitThumbFunc(MCSymbol *Func) override {} |
| |
| void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) override {} |
| void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) override {} |
| void EmitDwarfAdvanceLineAddr(int64_t LineDelta, |
| const MCSymbol *LastLabel, |
| const MCSymbol *Label, |
| unsigned PointerSize) override {} |
| |
| bool EmitSymbolAttribute(MCSymbol *Symbol, |
| MCSymbolAttr Attribute) override { |
| return true; |
| } |
| |
| void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) override {} |
| |
| void BeginCOFFSymbolDef(const MCSymbol *Symbol) override {} |
| void EmitCOFFSymbolStorageClass(int StorageClass) override {} |
| void EmitCOFFSymbolType(int Type) override {} |
| void EndCOFFSymbolDef() override {} |
| void EmitCOFFSecRel32(MCSymbol const *Symbol) override {} |
| |
| void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) override {} |
| void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size, |
| unsigned ByteAlignment) override {} |
| void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size, |
| unsigned ByteAlignment) override {} |
| void EmitZerofill(const MCSection *Section, MCSymbol *Symbol = nullptr, |
| uint64_t Size = 0, unsigned ByteAlignment = 0) override {} |
| void EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol, |
| uint64_t Size, unsigned ByteAlignment) override {} |
| void EmitBytes(StringRef Data) override {} |
| |
| void EmitValueImpl(const MCExpr *Value, unsigned Size, |
| const SMLoc &Loc = SMLoc()) override {} |
| void EmitULEB128Value(const MCExpr *Value) override {} |
| void EmitSLEB128Value(const MCExpr *Value) override {} |
| void EmitGPRel32Value(const MCExpr *Value) override {} |
| void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value = 0, |
| unsigned ValueSize = 1, |
| unsigned MaxBytesToEmit = 0) override {} |
| |
| void EmitCodeAlignment(unsigned ByteAlignment, |
| unsigned MaxBytesToEmit = 0) override {} |
| |
| bool EmitValueToOffset(const MCExpr *Offset, |
| unsigned char Value = 0) override { return false; } |
| |
| void EmitFileDirective(StringRef Filename) override {} |
| unsigned EmitDwarfFileDirective(unsigned FileNo, StringRef Directory, |
| StringRef Filename, |
| unsigned CUID = 0) override { |
| return 0; |
| } |
| void EmitDwarfLocDirective(unsigned FileNo, unsigned Line, |
| unsigned Column, unsigned Flags, |
| unsigned Isa, unsigned Discriminator, |
| StringRef FileName) override {} |
| void EmitInstruction(const MCInst &Inst, const MCSubtargetInfo&) override {} |
| |
| void EmitBundleAlignMode(unsigned AlignPow2) override {} |
| void EmitBundleLock(bool AlignToEnd) override {} |
| void EmitBundleUnlock() override {} |
| |
| void FinishImpl() override {} |
| |
| void EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) override { |
| RecordProcEnd(Frame); |
| } |
| }; |
| |
| } |
| |
| MCStreamer *llvm::createNullStreamer(MCContext &Context) { |
| return new MCNullStreamer(Context); |
| } |