1 //===-- llvm-split: command line tool for testing module splitter ---------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This program can be used to test the llvm::SplitModule function. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "llvm/ADT/StringExtras.h" 15 #include "llvm/Bitcode/ReaderWriter.h" 16 #include "llvm/IR/LLVMContext.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 int main(int argc, char **argv) { 39 LLVMContext &Context = getGlobalContext(); 40 SMDiagnostic Err; 41 cl::ParseCommandLineOptions(argc, argv, "LLVM module splitter\n"); 42 43 std::unique_ptr<Module> M = parseIRFile(InputFilename, Err, Context); 44 45 if (!M) { 46 Err.print(argv[0], errs()); 47 return 1; 48 } 49 50 unsigned I = 0; 51 SplitModule(std::move(M), NumOutputs, [&](std::unique_ptr<Module> MPart) { 52 std::error_code EC; 53 std::unique_ptr<tool_output_file> Out(new tool_output_file( 54 OutputFilename + utostr(I++), EC, sys::fs::F_None)); 55 if (EC) { 56 errs() << EC.message() << '\n'; 57 exit(1); 58 } 59 60 WriteBitcodeToFile(MPart.get(), Out->os()); 61 62 // Declare success. 63 Out->keep(); 64 }); 65 66 return 0; 67 } 68
