1 //===-- llvm-split: command line tool for testing module splitter ---------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This program can be used to test the llvm::SplitModule function. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "llvm/ADT/StringExtras.h" 14 #include "llvm/Bitcode/BitcodeWriter.h" 15 #include "llvm/IR/LLVMContext.h" 16 #include "llvm/IR/Verifier.h" 17 #include "llvm/IRReader/IRReader.h" 18 #include "llvm/Support/CommandLine.h" 19 #include "llvm/Support/FileSystem.h" 20 #include "llvm/Support/SourceMgr.h" 21 #include "llvm/Support/ToolOutputFile.h" 22 #include "llvm/Support/raw_ostream.h" 23 #include "llvm/Transforms/Utils/SplitModule.h" 24 25 using namespace llvm; 26 27 static cl::opt<std::string> 28 InputFilename(cl::Positional, cl::desc("<input bitcode file>"), 29 cl::init("-"), cl::value_desc("filename")); 30 31 static cl::opt<std::string> 32 OutputFilename("o", cl::desc("Override output filename"), 33 cl::value_desc("filename")); 34 35 static cl::opt<unsigned> NumOutputs("j", cl::Prefix, cl::init(2), 36 cl::desc("Number of output files")); 37 38 static cl::opt<bool> 39 PreserveLocals("preserve-locals", cl::Prefix, cl::init(false), 40 cl::desc("Split without externalizing locals")); 41 42 int main(int argc, char **argv) { 43 LLVMContext Context; 44 SMDiagnostic Err; 45 cl::ParseCommandLineOptions(argc, argv, "LLVM module splitter\n"); 46 47 std::unique_ptr<Module> M = parseIRFile(InputFilename, Err, Context); 48 49 if (!M) { 50 Err.print(argv[0], errs()); 51 return 1; 52 } 53 54 unsigned I = 0; 55 SplitModule( 56 *M, NumOutputs, 57 [&](std::unique_ptr<Module> MPart) { 58 std::error_code EC; 59 std::unique_ptr<ToolOutputFile> Out(new ToolOutputFile( 60 OutputFilename + utostr(I++), EC, sys::fs::OF_None)); 61 if (EC) { 62 errs() << EC.message() << '\n'; 63 exit(1); 64 } 65 66 if (verifyModule(*MPart, &errs())) { 67 errs() << "Broken module!\n"; 68 exit(1); 69 } 70 71 WriteBitcodeToFile(*MPart, Out->os()); 72 73 // Declare success. 74 Out->keep(); 75 }, 76 PreserveLocals); 77 78 return 0; 79 } 80