| //===- llvm-cat.cpp - LLVM module concatenation utility -------------------===// |
| // |
| // 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 program is for testing features that rely on multi-module bitcode files. |
| // It takes a list of input modules and uses them to create a multi-module |
| // bitcode file. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/ADT/SmallVector.h" |
| #include "llvm/Bitcode/BitcodeReader.h" |
| #include "llvm/Bitcode/BitcodeWriter.h" |
| #include "llvm/IR/LLVMContext.h" |
| #include "llvm/IR/Module.h" |
| #include "llvm/IRReader/IRReader.h" |
| #include "llvm/Support/CommandLine.h" |
| #include "llvm/Support/Error.h" |
| #include "llvm/Support/FileSystem.h" |
| #include "llvm/Support/MemoryBuffer.h" |
| #include "llvm/Support/SourceMgr.h" |
| #include "llvm/Support/raw_ostream.h" |
| #include <algorithm> |
| #include <memory> |
| #include <string> |
| #include <system_error> |
| #include <vector> |
| |
| using namespace llvm; |
| |
| cl::OptionCategory CatCategory("llvm-cat Options"); |
| |
| static cl::opt<bool> |
| BinaryCat("b", cl::desc("Whether to perform binary concatenation"), |
| cl::cat(CatCategory)); |
| |
| static cl::opt<std::string> OutputFilename("o", cl::Required, |
| cl::desc("Output filename"), |
| cl::value_desc("filename"), |
| cl::cat(CatCategory)); |
| |
| static cl::list<std::string> InputFilenames(cl::Positional, |
| cl::desc("<input files>"), |
| cl::cat(CatCategory)); |
| |
| int main(int argc, char **argv) { |
| cl::HideUnrelatedOptions(CatCategory); |
| cl::ParseCommandLineOptions(argc, argv, "Module concatenation"); |
| |
| ExitOnError ExitOnErr("llvm-cat: "); |
| LLVMContext Context; |
| |
| SmallVector<char, 0> Buffer; |
| BitcodeWriter Writer(Buffer); |
| if (BinaryCat) { |
| for (const auto &InputFilename : InputFilenames) { |
| std::unique_ptr<MemoryBuffer> MB = ExitOnErr( |
| errorOrToExpected(MemoryBuffer::getFileOrSTDIN(InputFilename))); |
| std::vector<BitcodeModule> Mods = ExitOnErr(getBitcodeModuleList(*MB)); |
| for (auto &BitcodeMod : Mods) { |
| llvm::append_range(Buffer, BitcodeMod.getBuffer()); |
| Writer.copyStrtab(BitcodeMod.getStrtab()); |
| } |
| } |
| } else { |
| // The string table does not own strings added to it, some of which are |
| // owned by the modules; keep them alive until we write the string table. |
| std::vector<std::unique_ptr<Module>> OwnedMods; |
| for (const auto &InputFilename : InputFilenames) { |
| SMDiagnostic Err; |
| std::unique_ptr<Module> M = parseIRFile(InputFilename, Err, Context); |
| if (!M) { |
| Err.print(argv[0], errs()); |
| return 1; |
| } |
| Writer.writeModule(*M); |
| OwnedMods.push_back(std::move(M)); |
| } |
| Writer.writeStrtab(); |
| } |
| |
| std::error_code EC; |
| raw_fd_ostream OS(OutputFilename, EC, sys::fs::OpenFlags::OF_None); |
| if (EC) { |
| errs() << argv[0] << ": cannot open " << OutputFilename << " for writing: " |
| << EC.message(); |
| return 1; |
| } |
| |
| OS.write(Buffer.data(), Buffer.size()); |
| return 0; |
| } |