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1//===- LTO.h ----------------------------------------------------*- 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-exception6//7//===----------------------------------------------------------------------===//8//9// This file provides a way to combine bitcode files into one COFF10// file by compiling them using LLVM.11//12// If LTO is in use, your input files are not in regular COFF files13// but instead LLVM bitcode files. In that case, the linker has to14// convert bitcode files into the native format so that we can create15// a COFF file that contains native code. This file provides that16// functionality.17//18//===----------------------------------------------------------------------===//19 20#ifndef LLD_COFF_LTO_H21#define LLD_COFF_LTO_H22 23#include "lld/Common/LLVM.h"24#include "llvm/ADT/DenseSet.h"25#include "llvm/ADT/SmallString.h"26#include "llvm/Support/raw_ostream.h"27#include <memory>28#include <vector>29 30namespace llvm::lto {31struct Config;32class LTO;33}34 35namespace lld::coff {36 37class BitcodeFile;38class InputFile;39class COFFLinkerContext;40 41class BitcodeCompiler {42public:43 BitcodeCompiler(COFFLinkerContext &ctx);44 ~BitcodeCompiler();45 46 void add(BitcodeFile &f);47 std::vector<InputFile *> compile();48 49private:50 std::unique_ptr<llvm::lto::LTO> ltoObj;51 std::vector<std::pair<std::string, SmallString<0>>> buf;52 std::vector<std::unique_ptr<MemoryBuffer>> files;53 std::vector<std::string> file_names;54 std::unique_ptr<llvm::raw_fd_ostream> indexFile;55 llvm::DenseSet<StringRef> thinIndices;56 57 std::string getThinLTOOutputFile(StringRef path);58 llvm::lto::Config createConfig();59 60 COFFLinkerContext &ctx;61};62}63 64#endif65