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/ADT/StringRef.h"
11 #include "llvm/MC/MCInst.h"
12 #include "llvm/MC/MCStreamer.h"
13 #include "llvm/MC/MCSymbol.h"
14 
15 using namespace llvm;
16 
17 namespace {
18 
19   class MCNullStreamer : public MCStreamer {
20   public:
21     MCNullStreamer(MCContext &Context) : MCStreamer(Context) {}
22 
23     /// @name MCStreamer Interface
24     /// @{
25 
26     bool hasRawTextSupport() const override { return true; }
27     void EmitRawTextImpl(StringRef String) override {}
28 
29     bool EmitSymbolAttribute(MCSymbol *Symbol,
30                              MCSymbolAttr Attribute) override {
31       return true;
32     }
33 
34     void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
35                           unsigned ByteAlignment) override {}
36     void EmitZerofill(MCSection *Section, MCSymbol *Symbol = nullptr,
37                       uint64_t Size = 0, unsigned ByteAlignment = 0,
38                       SMLoc Loc = SMLoc()) override {}
39     void EmitGPRel32Value(const MCExpr *Value) override {}
40     void BeginCOFFSymbolDef(const MCSymbol *Symbol) override {}
41     void EmitCOFFSymbolStorageClass(int StorageClass) override {}
42     void EmitCOFFSymbolType(int Type) override {}
43     void EndCOFFSymbolDef() override {}
44   };
45 
46 }
47 
48 MCStreamer *llvm::createNullStreamer(MCContext &Context) {
49   return new MCNullStreamer(Context);
50 }
51