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-exception 6// 7//===----------------------------------------------------------------------===// 8// 9// This file provides a way to combine bitcode files into one wasm 10// file by compiling them using LLVM. 11// 12// If LTO is in use, your input files are not in regular wasm files 13// but instead LLVM bitcode files. In that case, the linker has to 14// convert bitcode files into the native format so that we can create 15// a wasm file that contains native code. This file provides that 16// functionality. 17// 18//===----------------------------------------------------------------------===// 19 20#ifndef LLD_WASM_LTO_H 21#define LLD_WASM_LTO_H 22 23#include "lld/Common/LLVM.h" 24#include "llvm/ADT/SmallString.h" 25#include "Writer.h" 26#include <memory> 27#include <vector> 28 29namespace llvm { 30namespace lto { 31class LTO; 32} 33} // namespace llvm 34 35namespace lld { 36namespace wasm { 37 38class BitcodeFile; 39class InputFile; 40 41class BitcodeCompiler { 42public: 43 BitcodeCompiler(); 44 ~BitcodeCompiler(); 45 46 void add(BitcodeFile &f); 47 std::vector<StringRef> compile(); 48 49private: 50 std::unique_ptr<llvm::lto::LTO> ltoObj; 51 std::vector<SmallString<0>> buf; 52 std::vector<std::unique_ptr<MemoryBuffer>> files; 53}; 54} // namespace wasm 55} // namespace lld 56 57#endif 58