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9a450a0096
The changes in this PR (both in the code and the tests) are largely copied directly from the ELF linker. Partial fix for #79604.
61 lines
1.7 KiB
C++
61 lines
1.7 KiB
C++
//===- LTO.h ----------------------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file provides a way to combine bitcode files into one wasm
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// file by compiling them using LLVM.
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//
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// If LTO is in use, your input files are not in regular wasm files
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// but instead LLVM bitcode files. In that case, the linker has to
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// convert bitcode files into the native format so that we can create
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// a wasm file that contains native code. This file provides that
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// functionality.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLD_WASM_LTO_H
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#define LLD_WASM_LTO_H
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#include "Writer.h"
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#include "lld/Common/LLVM.h"
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#include "llvm/ADT/DenseSet.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/Support/raw_ostream.h"
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#include <memory>
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#include <vector>
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namespace llvm {
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namespace lto {
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class LTO;
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}
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} // namespace llvm
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namespace lld::wasm {
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class BitcodeFile;
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class InputFile;
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class BitcodeCompiler {
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public:
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BitcodeCompiler();
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~BitcodeCompiler();
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void add(BitcodeFile &f);
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std::vector<StringRef> compile();
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private:
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std::unique_ptr<llvm::lto::LTO> ltoObj;
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// An array of (module name, native relocatable file content) pairs.
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SmallVector<std::pair<std::string, SmallString<0>>, 0> buf;
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std::vector<std::unique_ptr<MemoryBuffer>> files;
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std::unique_ptr<llvm::raw_fd_ostream> indexFile;
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llvm::DenseSet<StringRef> thinIndices;
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};
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} // namespace lld::wasm
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#endif
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