//===- LTO.h ----------------------------------------------------*- C++ -*-===// // // 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 // //===----------------------------------------------------------------------===// // // This file provides a way to combine bitcode files into one ELF // file by compiling them using LLVM. // // If LTO is in use, your input files are not in regular ELF files // but instead LLVM bitcode files. In that case, the linker has to // convert bitcode files into the native format so that we can create // an ELF file that contains native code. This file provides that // functionality. // //===----------------------------------------------------------------------===// #ifndef LLD_ELF_LTO_H #define LLD_ELF_LTO_H #include "lld/Common/LLVM.h" #include "llvm/ADT/DenseSet.h" #include "llvm/ADT/SmallString.h" #include "llvm/Support/raw_ostream.h" #include <memory> #include <vector> namespace llvm { namespace lto { class LTO; } } // namespace llvm namespace lld { namespace elf { class BitcodeFile; class InputFile; class LazyObjFile; class BitcodeCompiler { public: BitcodeCompiler(); ~BitcodeCompiler(); void add(BitcodeFile &f); std::vector<InputFile *> compile(); private: std::unique_ptr<llvm::lto::LTO> ltoObj; std::vector<SmallString<0>> buf; std::vector<std::unique_ptr<MemoryBuffer>> files; llvm::DenseSet<StringRef> usedStartStop; std::unique_ptr<llvm::raw_fd_ostream> indexFile; llvm::DenseSet<StringRef> thinIndices; }; } // namespace elf } // namespace lld #endif |