98 lines
3.4 KiB
C++
98 lines
3.4 KiB
C++
//===- 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::ZeroOrMore,
|
|
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) {
|
|
Buffer.insert(Buffer.end(), BitcodeMod.getBuffer().begin(),
|
|
BitcodeMod.getBuffer().end());
|
|
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::F_None);
|
|
if (EC) {
|
|
errs() << argv[0] << ": cannot open " << OutputFilename << " for writing: "
|
|
<< EC.message();
|
|
return 1;
|
|
}
|
|
|
|
OS.write(Buffer.data(), Buffer.size());
|
|
return 0;
|
|
}
|