lib/MC/MCNullStreamer.cpp

   1 //===- lib/MC/MCNullStreamer.cpp - Dummy Streamer Implementation ----------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include "llvm/MC/MCStreamer.h"
  11
  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"
  17
  18 using namespace llvm;
  19
  20 namespace {
  21
  22   class MCNullStreamer : public MCStreamer {
  23   public:
  24     MCNullStreamer(MCContext &Context) : MCStreamer(Context) {}
  25
  26     /// @name MCStreamer Interface
  27     /// @{
  28
  29     virtual void SwitchSection(MCSection *Section) {}
  30
  31     virtual void EmitLabel(MCSymbol *Symbol) {}
  32
  33     virtual void EmitAssemblerFlag(AssemblerFlag Flag) {}
  34
  35     virtual void EmitAssignment(MCSymbol *Symbol, const MCValue &Value,
  36                                 bool MakeAbsolute = false) {}
  37
  38     virtual void EmitSymbolAttribute(MCSymbol *Symbol, SymbolAttr Attribute) {}
  39
  40     virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {}
  41
  42     virtual void EmitLocalSymbol(MCSymbol *Symbol, const MCValue &Value) {}
  43
  44     virtual void EmitCommonSymbol(MCSymbol *Symbol, unsigned Size,
  45                                   unsigned Pow2Alignment, bool IsLocal) {}
  46
  47     virtual void EmitZerofill(MCSection *Section, MCSymbol *Symbol = NULL,
  48                               unsigned Size = 0, unsigned Pow2Alignment = 0) {}
  49
  50     virtual void EmitBytes(const StringRef &Data) {}
  51
  52     virtual void EmitValue(const MCValue &Value, unsigned Size) {}
  53
  54     virtual void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value = 0,
  55                                       unsigned ValueSize = 1,
  56                                       unsigned MaxBytesToEmit = 0) {}
  57
  58     virtual void EmitValueToOffset(const MCValue &Offset,
  59                                    unsigned char Value = 0) {}
  60
  61     virtual void EmitInstruction(const MCInst &Inst) {}
  62
  63     virtual void Finish() {}
  64
  65     /// @}
  66   };
  67
  68 }
  69
  70 MCStreamer *llvm::createNullStreamer(MCContext &Context) {
  71   return new MCNullStreamer(Context);
  72 }