1*0b57cec5SDimitry Andric //===- LTO.h ----------------------------------------------------*- C++ -*-===// 2*0b57cec5SDimitry Andric // 3*0b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*0b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5*0b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*0b57cec5SDimitry Andric // 7*0b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 8*0b57cec5SDimitry Andric // 9*0b57cec5SDimitry Andric // This file provides a way to combine bitcode files into one ELF 10*0b57cec5SDimitry Andric // file by compiling them using LLVM. 11*0b57cec5SDimitry Andric // 12*0b57cec5SDimitry Andric // If LTO is in use, your input files are not in regular ELF files 13*0b57cec5SDimitry Andric // but instead LLVM bitcode files. In that case, the linker has to 14*0b57cec5SDimitry Andric // convert bitcode files into the native format so that we can create 15*0b57cec5SDimitry Andric // an ELF file that contains native code. This file provides that 16*0b57cec5SDimitry Andric // functionality. 17*0b57cec5SDimitry Andric // 18*0b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 19*0b57cec5SDimitry Andric 20*0b57cec5SDimitry Andric #ifndef LLD_ELF_LTO_H 21*0b57cec5SDimitry Andric #define LLD_ELF_LTO_H 22*0b57cec5SDimitry Andric 23*0b57cec5SDimitry Andric #include "lld/Common/LLVM.h" 24*0b57cec5SDimitry Andric #include "llvm/ADT/DenseSet.h" 25*0b57cec5SDimitry Andric #include "llvm/ADT/SmallString.h" 26*0b57cec5SDimitry Andric #include "llvm/Support/raw_ostream.h" 27*0b57cec5SDimitry Andric #include <memory> 28*0b57cec5SDimitry Andric #include <vector> 29*0b57cec5SDimitry Andric 30*0b57cec5SDimitry Andric namespace llvm { 31*0b57cec5SDimitry Andric namespace lto { 32*0b57cec5SDimitry Andric class LTO; 33*0b57cec5SDimitry Andric } 34*0b57cec5SDimitry Andric } // namespace llvm 35*0b57cec5SDimitry Andric 36*0b57cec5SDimitry Andric namespace lld { 37*0b57cec5SDimitry Andric namespace elf { 38*0b57cec5SDimitry Andric 39*0b57cec5SDimitry Andric class BitcodeFile; 40*0b57cec5SDimitry Andric class InputFile; 41*0b57cec5SDimitry Andric class LazyObjFile; 42*0b57cec5SDimitry Andric 43*0b57cec5SDimitry Andric class BitcodeCompiler { 44*0b57cec5SDimitry Andric public: 45*0b57cec5SDimitry Andric BitcodeCompiler(); 46*0b57cec5SDimitry Andric ~BitcodeCompiler(); 47*0b57cec5SDimitry Andric 48*0b57cec5SDimitry Andric void add(BitcodeFile &f); 49*0b57cec5SDimitry Andric std::vector<InputFile *> compile(); 50*0b57cec5SDimitry Andric 51*0b57cec5SDimitry Andric private: 52*0b57cec5SDimitry Andric std::unique_ptr<llvm::lto::LTO> ltoObj; 53*0b57cec5SDimitry Andric std::vector<SmallString<0>> buf; 54*0b57cec5SDimitry Andric std::vector<std::unique_ptr<MemoryBuffer>> files; 55*0b57cec5SDimitry Andric llvm::DenseSet<StringRef> usedStartStop; 56*0b57cec5SDimitry Andric std::unique_ptr<llvm::raw_fd_ostream> indexFile; 57*0b57cec5SDimitry Andric llvm::DenseSet<StringRef> thinIndices; 58*0b57cec5SDimitry Andric }; 59*0b57cec5SDimitry Andric } // namespace elf 60*0b57cec5SDimitry Andric } // namespace lld 61*0b57cec5SDimitry Andric 62*0b57cec5SDimitry Andric #endif 63