text: //===-- 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;
  }
  