LLVM  10.0.0svn
MCNullStreamer.cpp
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1 //===- lib/MC/MCNullStreamer.cpp - Dummy Streamer Implementation ----------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "llvm/ADT/StringRef.h"
10 #include "llvm/MC/MCInst.h"
11 #include "llvm/MC/MCStreamer.h"
12 #include "llvm/MC/MCSymbol.h"
13 
14 using namespace llvm;
15 
16 namespace {
17 
18  class MCNullStreamer : public MCStreamer {
19  public:
20  MCNullStreamer(MCContext &Context) : MCStreamer(Context) {}
21 
22  /// @name MCStreamer Interface
23  /// @{
24 
25  bool hasRawTextSupport() const override { return true; }
26  void EmitRawTextImpl(StringRef String) override {}
27 
28  bool EmitSymbolAttribute(MCSymbol *Symbol,
29  MCSymbolAttr Attribute) override {
30  return true;
31  }
32 
33  void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
34  unsigned ByteAlignment) override {}
35  void EmitZerofill(MCSection *Section, MCSymbol *Symbol = nullptr,
36  uint64_t Size = 0, unsigned ByteAlignment = 0,
37  SMLoc Loc = SMLoc()) override {}
38  void EmitGPRel32Value(const MCExpr *Value) override {}
39  void BeginCOFFSymbolDef(const MCSymbol *Symbol) override {}
40  void EmitCOFFSymbolStorageClass(int StorageClass) override {}
41  void EmitCOFFSymbolType(int Type) override {}
42  void EndCOFFSymbolDef() override {}
43  };
44 
45 }
46 
48  return new MCNullStreamer(Context);
49 }
Instances of this class represent a uniqued identifier for a section in the current translation unit...
Definition: MCSection.h:39
LLVMContext & Context
This class represents lattice values for constants.
Definition: AllocatorList.h:23
MCSymbol - Instances of this class represent a symbol name in the MC file, and MCSymbols are created ...
Definition: MCSymbol.h:41
MCStreamer * createNullStreamer(MCContext &Ctx)
Create a dummy machine code streamer, which does nothing.
COFF::SymbolStorageClass StorageClass
Definition: COFFYAML.cpp:356
Base class for the full range of assembler expressions which are needed for parsing.
Definition: MCExpr.h:35
Context object for machine code objects.
Definition: MCContext.h:65
Streaming machine code generation interface.
Definition: MCStreamer.h:196
The instances of the Type class are immutable: once they are created, they are never changed...
Definition: Type.h:46
MCSymbolAttr
Definition: MCDirectives.h:18
uint32_t Size
Definition: Profile.cpp:46
LLVM Value Representation.
Definition: Value.h:74
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:48
Represents a location in source code.
Definition: SMLoc.h:23