1 //===- lib/MC/MCNullStreamer.cpp - Dummy Streamer Implementation ----------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "llvm/MC/MCStreamer.h"
12 #include "llvm/MC/MCContext.h"
13 #include "llvm/MC/MCInst.h"
14 #include "llvm/MC/MCSectionMachO.h"
15 #include "llvm/MC/MCSymbol.h"
16 #include "llvm/MC/MCValue.h"
22 class MCNullStreamer : public MCStreamer {
24 MCNullStreamer(MCContext &Context) : MCStreamer(Context) {}
26 /// @name MCStreamer Interface
29 virtual void SwitchSection(const MCSection *Section) {
33 virtual void EmitLabel(MCSymbol *Symbol) {}
35 virtual void EmitAssemblerFlag(AssemblerFlag Flag) {}
37 virtual void EmitAssignment(MCSymbol *Symbol, const MCValue &Value,
38 bool MakeAbsolute = false) {}
40 virtual void EmitSymbolAttribute(MCSymbol *Symbol, SymbolAttr Attribute) {}
42 virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {}
44 virtual void EmitLocalSymbol(MCSymbol *Symbol, const MCValue &Value) {}
46 virtual void EmitCommonSymbol(MCSymbol *Symbol, unsigned Size,
47 unsigned Pow2Alignment, bool IsLocal) {}
49 virtual void EmitZerofill(const MCSection *Section, MCSymbol *Symbol = 0,
50 unsigned Size = 0, unsigned Pow2Alignment = 0) {}
52 virtual void EmitBytes(const StringRef &Data) {}
54 virtual void EmitValue(const MCValue &Value, unsigned Size) {}
56 virtual void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value = 0,
57 unsigned ValueSize = 1,
58 unsigned MaxBytesToEmit = 0) {}
60 virtual void EmitValueToOffset(const MCValue &Offset,
61 unsigned char Value = 0) {}
63 virtual void EmitInstruction(const MCInst &Inst) {}
65 virtual void Finish() {}
72 MCStreamer *llvm::createNullStreamer(MCContext &Context) {
73 return new MCNullStreamer(Context);