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  1. //===- MCDXContainerStreamer.h - MCDXContainerStreamer Interface ---*- C++ ===//
  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. // Overrides MCObjectStreamer to disable all unnecessary features with stubs.
  10. // The DXContainer format isn't a fully featured object format. It doesn't
  11. // support symbols, and initially it will not support instruction data since it
  12. // is used as a bitcode container for DXIL.
  13. //
  14. //===----------------------------------------------------------------------===//
  15.  
  16. #ifndef LLVM_MC_MCDXCONTAINERSTREAMER_H
  17. #define LLVM_MC_MCDXCONTAINERSTREAMER_H
  18.  
  19. #include "llvm/MC/MCAsmBackend.h"
  20. #include "llvm/MC/MCCodeEmitter.h"
  21. #include "llvm/MC/MCObjectStreamer.h"
  22. #include "llvm/MC/MCObjectWriter.h"
  23.  
  24. namespace llvm {
  25. class MCInst;
  26. class raw_ostream;
  27.  
  28. class MCDXContainerStreamer : public MCObjectStreamer {
  29. public:
  30.   MCDXContainerStreamer(MCContext &Context, std::unique_ptr<MCAsmBackend> TAB,
  31.                         std::unique_ptr<MCObjectWriter> OW,
  32.                         std::unique_ptr<MCCodeEmitter> Emitter)
  33.       : MCObjectStreamer(Context, std::move(TAB), std::move(OW),
  34.                          std::move(Emitter)) {}
  35.  
  36.   bool emitSymbolAttribute(MCSymbol *, MCSymbolAttr) override { return false; }
  37.   void emitCommonSymbol(MCSymbol *, uint64_t, Align) override {}
  38.   void emitZerofill(MCSection *, MCSymbol *Symbol = nullptr, uint64_t Size = 0,
  39.                     Align ByteAlignment = Align(1),
  40.                     SMLoc Loc = SMLoc()) override {}
  41.  
  42. private:
  43.   void emitInstToData(const MCInst &, const MCSubtargetInfo &) override;
  44. };
  45.  
  46. } // end namespace llvm
  47.  
  48. #endif // LLVM_MC_MCDXCONTAINERSTREAMER_H
  49.