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//===-- llvm-cat.cpp - LLVM module concatenation utility ------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// 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/Bitcode/BitcodeReader.h"
#include "llvm/Bitcode/BitcodeWriter.h"
#include "llvm/IRReader/IRReader.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/FileSystem.h"
using namespace llvm;
static cl::opt<bool>
BinaryCat("b", cl::desc("Whether to perform binary concatenation"));
static cl::opt<std::string> OutputFilename("o", cl::Required,
cl::desc("Output filename"),
cl::value_desc("filename"));
static cl::list<std::string> InputFilenames(cl::Positional, cl::ZeroOrMore,
cl::desc("<input files>"));
int main(int argc, char **argv) {
cl::ParseCommandLineOptions(argc, argv, "Module concatenation");
ExitOnError ExitOnErr("llvm-cat: ");
LLVMContext Context;
SmallVector<char, 0> Buffer;
BitcodeWriter Writer(Buffer);
if (BinaryCat) {
for (std::string InputFilename : InputFilenames) {
std::unique_ptr<MemoryBuffer> MB = ExitOnErr(
errorOrToExpected(MemoryBuffer::getFileOrSTDIN(InputFilename)));
std::vector<BitcodeModule> Mods = ExitOnErr(getBitcodeModuleList(*MB));
for (auto &BitcodeMod : Mods)
Buffer.insert(Buffer.end(), BitcodeMod.getBuffer().begin(),
BitcodeMod.getBuffer().end());
}
} else {
for (std::string 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.get());
}
}
std::error_code EC;
raw_fd_ostream OS(OutputFilename, EC, sys::fs::OpenFlags::F_None);
if (EC) {
llvm::errs() << argv[0] << ": cannot open " << OutputFilename
<< " for writing: " << EC.message();
return 1;
}
OS.write(Buffer.data(), Buffer.size());
return 0;
}
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