DXILBitcodeWriter.h

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//===- Bitcode/Writer/DXILBitcodeWriter.cpp - DXIL Bitcode Writer ---------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// Bitcode writer implementation.
//
//===----------------------------------------------------------------------===//
 
#include "llvm/ADT/StringRef.h"
#include "llvm/IR/ModuleSummaryIndex.h"
#include "llvm/MC/StringTableBuilder.h"
#include "llvm/Support/Allocator.h"
#include "llvm/Support/MemoryBufferRef.h"
#include <map>
#include <memory>
#include <string>
#include <vector>
 
namespace llvm {
 
class BitstreamWriter;
class Module;
class raw_ostream;
 
namespace dxil {
 
class BitcodeWriter {
  SmallVectorImpl<char> &Buffer;
  std::unique_ptr<BitstreamWriter> Stream;
 
  StringTableBuilder StrtabBuilder{StringTableBuilder::RAW};
 
  // Owns any strings created by the irsymtab writer until we create the
  // string table.
  BumpPtrAllocator Alloc;
 
  void writeBlob(unsigned Block, unsigned Record, StringRef Blob);
 
  std::vector<Module *> Mods;
 
public:
  /// Create a BitcodeWriter that writes to Buffer.
  BitcodeWriter(SmallVectorImpl<char> &Buffer, raw_fd_stream *FS = nullptr);
 
  ~BitcodeWriter();
 
  /// Write the specified module to the buffer specified at construction time.
  void writeModule(const Module &M);
};
 
/// Write the specified module to the specified raw output stream.
///
/// For streams where it matters, the given stream should be in "binary"
/// mode.
void WriteDXILToFile(const Module &M, raw_ostream &Out);
 
} // namespace dxil
 
} // namespace llvm