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 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 = getGlobalContext(); 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(std::move(M), NumOutputs, [&](std::unique_ptr<Module> MPart) { 56 std::error_code EC; 57 std::unique_ptr<tool_output_file> Out(new tool_output_file( 58 OutputFilename + utostr(I++), EC, sys::fs::F_None)); 59 if (EC) { 60 errs() << EC.message() << '\n'; 61 exit(1); 62 } 63 64 WriteBitcodeToFile(MPart.get(), Out->os()); 65 66 // Declare success. 67 Out->keep(); 68 }, PreserveLocals); 69 70 return 0; 71 } 72