10b57cec5SDimitry Andric //===- LTO.h ----------------------------------------------------*- C++ -*-===// 20b57cec5SDimitry Andric // 30b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 40b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 50b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 60b57cec5SDimitry Andric // 70b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 80b57cec5SDimitry Andric // 90b57cec5SDimitry Andric // This file provides a way to combine bitcode files into one ELF 100b57cec5SDimitry Andric // file by compiling them using LLVM. 110b57cec5SDimitry Andric // 120b57cec5SDimitry Andric // If LTO is in use, your input files are not in regular ELF files 130b57cec5SDimitry Andric // but instead LLVM bitcode files. In that case, the linker has to 140b57cec5SDimitry Andric // convert bitcode files into the native format so that we can create 150b57cec5SDimitry Andric // an ELF file that contains native code. This file provides that 160b57cec5SDimitry Andric // functionality. 170b57cec5SDimitry Andric // 180b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 190b57cec5SDimitry Andric 200b57cec5SDimitry Andric #ifndef LLD_ELF_LTO_H 210b57cec5SDimitry Andric #define LLD_ELF_LTO_H 220b57cec5SDimitry Andric 230b57cec5SDimitry Andric #include "lld/Common/LLVM.h" 240b57cec5SDimitry Andric #include "llvm/ADT/DenseSet.h" 250b57cec5SDimitry Andric #include "llvm/ADT/SmallString.h" 260b57cec5SDimitry Andric #include "llvm/Support/raw_ostream.h" 270b57cec5SDimitry Andric #include <memory> 280b57cec5SDimitry Andric #include <vector> 290b57cec5SDimitry Andric 30bdd1243dSDimitry Andric namespace llvm::lto { 310b57cec5SDimitry Andric class LTO; 320b57cec5SDimitry Andric } 330b57cec5SDimitry Andric 34bdd1243dSDimitry Andric namespace lld::elf { 350b57cec5SDimitry Andric 360b57cec5SDimitry Andric class BitcodeFile; 370b57cec5SDimitry Andric class InputFile; 380b57cec5SDimitry Andric 390b57cec5SDimitry Andric class BitcodeCompiler { 400b57cec5SDimitry Andric public: 410b57cec5SDimitry Andric BitcodeCompiler(); 420b57cec5SDimitry Andric ~BitcodeCompiler(); 430b57cec5SDimitry Andric 440b57cec5SDimitry Andric void add(BitcodeFile &f); 450b57cec5SDimitry Andric std::vector<InputFile *> compile(); 460b57cec5SDimitry Andric 470b57cec5SDimitry Andric private: 480b57cec5SDimitry Andric std::unique_ptr<llvm::lto::LTO> ltoObj; 49*7a6dacacSDimitry Andric // An array of (module name, native relocatable file content) pairs. 50*7a6dacacSDimitry Andric SmallVector<std::pair<std::string, SmallString<0>>, 0> buf; 510b57cec5SDimitry Andric std::vector<std::unique_ptr<MemoryBuffer>> files; 52*7a6dacacSDimitry Andric SmallVector<std::string, 0> filenames; 530b57cec5SDimitry Andric llvm::DenseSet<StringRef> usedStartStop; 540b57cec5SDimitry Andric std::unique_ptr<llvm::raw_fd_ostream> indexFile; 550b57cec5SDimitry Andric llvm::DenseSet<StringRef> thinIndices; 560b57cec5SDimitry Andric }; 57bdd1243dSDimitry Andric } // namespace lld::elf 580b57cec5SDimitry Andric 590b57cec5SDimitry Andric #endif 60