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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
77 lines
2.6 KiB
C++
77 lines
2.6 KiB
C++
//===-- llvm-modextract.cpp - LLVM module extractor utility ---------------===//
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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 program is for testing features that rely on multi-module bitcode files.
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// It takes a multi-module bitcode file, extracts one of the modules and writes
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// it to the output file.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Bitcode/BitcodeReader.h"
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#include "llvm/Bitcode/BitcodeWriter.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/Error.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/ToolOutputFile.h"
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using namespace llvm;
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static cl::opt<bool>
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BinaryExtract("b", cl::desc("Whether to perform binary extraction"));
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static cl::opt<std::string> OutputFilename("o", cl::Required,
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cl::desc("Output filename"),
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cl::value_desc("filename"));
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static cl::opt<std::string>
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InputFilename(cl::Positional, cl::desc("<input bitcode>"), cl::init("-"));
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static cl::opt<unsigned> ModuleIndex("n", cl::Required,
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cl::desc("Index of module to extract"),
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cl::value_desc("index"));
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int main(int argc, char **argv) {
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cl::ParseCommandLineOptions(argc, argv, "Module extractor");
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ExitOnError ExitOnErr("llvm-modextract: error: ");
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std::unique_ptr<MemoryBuffer> MB =
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ExitOnErr(errorOrToExpected(MemoryBuffer::getFileOrSTDIN(InputFilename)));
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std::vector<BitcodeModule> Ms = ExitOnErr(getBitcodeModuleList(*MB));
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LLVMContext Context;
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if (ModuleIndex >= Ms.size()) {
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errs() << "llvm-modextract: error: module index out of range; bitcode file "
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"contains "
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<< Ms.size() << " module(s)\n";
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return 1;
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}
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std::error_code EC;
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std::unique_ptr<ToolOutputFile> Out(
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new ToolOutputFile(OutputFilename, EC, sys::fs::F_None));
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ExitOnErr(errorCodeToError(EC));
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if (BinaryExtract) {
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SmallVector<char, 0> Result;
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BitcodeWriter Writer(Result);
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Result.append(Ms[ModuleIndex].getBuffer().begin(),
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Ms[ModuleIndex].getBuffer().end());
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Writer.copyStrtab(Ms[ModuleIndex].getStrtab());
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Out->os() << Result;
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Out->keep();
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return 0;
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}
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std::unique_ptr<Module> M = ExitOnErr(Ms[ModuleIndex].parseModule(Context));
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WriteBitcodeToFile(*M, Out->os());
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Out->keep();
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return 0;
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}
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