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Diffstat (limited to 'lld/ELF/LTO.h')
-rw-r--r-- | lld/ELF/LTO.h | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/lld/ELF/LTO.h b/lld/ELF/LTO.h new file mode 100644 index 000000000000..4cb42d84d919 --- /dev/null +++ b/lld/ELF/LTO.h @@ -0,0 +1,62 @@ +//===- 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 |