llvm/lib/MC/MCNullStreamer.cpp

   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/MCDirectives.h"
  11 #include "llvm/MC/MCStreamer.h"
  12 #include "llvm/Support/SMLoc.h"
  13 namespace llvm {
  14 class MCContext;
  15 class MCExpr;
  16 class MCSection;
  17 class MCSymbol;
  18 } // namespace llvm
  19
  20 using namespace llvm;
  21
  22 namespace {
  23
  24   class MCNullStreamer : public MCStreamer {
  25   public:
  26     MCNullStreamer(MCContext &Context) : MCStreamer(Context) {}
  27
  28     /// @name MCStreamer Interface
  29     /// @{
  30
  31     bool hasRawTextSupport() const override { return true; }
  32     void emitRawTextImpl(StringRef String) override {}
  33
  34     bool emitSymbolAttribute(MCSymbol *Symbol,
  35                              MCSymbolAttr Attribute) override {
  36       return true;
  37     }
  38
  39     void emitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
  40                           Align ByteAlignment) override {}
  41     void emitZerofill(MCSection *Section, MCSymbol *Symbol = nullptr,
  42                       uint64_t Size = 0, Align ByteAlignment = Align(1),
  43                       SMLoc Loc = SMLoc()) override {}
  44     void emitGPRel32Value(const MCExpr *Value) override {}
  45     void beginCOFFSymbolDef(const MCSymbol *Symbol) override {}
  46     void emitCOFFSymbolStorageClass(int StorageClass) override {}
  47     void emitCOFFSymbolType(int Type) override {}
  48     void endCOFFSymbolDef() override {}
  49     void
  50     emitXCOFFSymbolLinkageWithVisibility(MCSymbol *Symbol, MCSymbolAttr Linkage,
  51                                          MCSymbolAttr Visibility) override {}
  52   };
  53
  54 }
  55
  56 MCStreamer *llvm::createNullStreamer(MCContext &Context) {
  57   return new MCNullStreamer(Context);
  58 }