83 lines
2.6 KiB
C++
83 lines
2.6 KiB
C++
//===- 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;
|
|
|
|
bool WroteStrtab = false, WroteSymtab = false;
|
|
|
|
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();
|
|
|
|
/// Attempt to write a symbol table to the bitcode file. This must be called
|
|
/// at most once after all modules have been written.
|
|
///
|
|
/// A reader does not require a symbol table to interpret a bitcode file;
|
|
/// the symbol table is needed only to improve link-time performance. So
|
|
/// this function may decide not to write a symbol table. It may so decide
|
|
/// if, for example, the target is unregistered or the IR is malformed.
|
|
void writeSymtab();
|
|
|
|
/// Write the bitcode file's string table. This must be called exactly once
|
|
/// after all modules and the optional symbol table have been written.
|
|
void writeStrtab();
|
|
|
|
/// Copy the string table for another module into this bitcode file. This
|
|
/// should be called after copying the module itself into the bitcode file.
|
|
void copyStrtab(StringRef Strtab);
|
|
|
|
/// 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
|