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//===-- llvm-split: command line tool for testing module splitter ---------===//
//
// 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 can be used to test the llvm::SplitModule function.
//
//===----------------------------------------------------------------------===//
#include "llvm/ADT/StringExtras.h"
#include "llvm/Bitcode/BitcodeWriter.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Verifier.h"
#include "llvm/IRReader/IRReader.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/ToolOutputFile.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Transforms/Utils/SplitModule.h"
using namespace llvm;
static cl::opt<std::string>
InputFilename(cl::Positional, cl::desc("<input bitcode file>"),
cl::init("-"), cl::value_desc("filename"));
static cl::opt<std::string>
OutputFilename("o", cl::desc("Override output filename"),
cl::value_desc("filename"));
static cl::opt<unsigned> NumOutputs("j", cl::Prefix, cl::init(2),
cl::desc("Number of output files"));
static cl::opt<bool>
PreserveLocals("preserve-locals", cl::Prefix, cl::init(false),
cl::desc("Split without externalizing locals"));
int main(int argc, char **argv) {
LLVMContext Context;
SMDiagnostic Err;
cl::ParseCommandLineOptions(argc, argv, "LLVM module splitter\n");
std::unique_ptr<Module> M = parseIRFile(InputFilename, Err, Context);
if (!M) {
Err.print(argv[0], errs());
return 1;
}
unsigned I = 0;
SplitModule(std::move(M), NumOutputs, [&](std::unique_ptr<Module> MPart) {
std::error_code EC;
std::unique_ptr<ToolOutputFile> Out(
new ToolOutputFile(OutputFilename + utostr(I++), EC, sys::fs::OF_None));
if (EC) {
errs() << EC.message() << '\n';
exit(1);
}
if (verifyModule(*MPart, &errs())) {
errs() << "Broken module!\n";
exit(1);
}
WriteBitcodeToFile(*MPart, Out->os());
// Declare success.
Out->keep();
}, PreserveLocals);
return 0;
}
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