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/Support/WithColor.h" 24 #include "llvm/Transforms/Utils/SplitModule.h" 25 26 using namespace llvm; 27 28 static cl::OptionCategory SplitCategory("Split Options"); 29 30 static cl::opt<std::string> InputFilename(cl::Positional, 31 cl::desc("<input bitcode file>"), 32 cl::init("-"), 33 cl::value_desc("filename"), 34 cl::cat(SplitCategory)); 35 36 static cl::opt<std::string> OutputFilename("o", 37 cl::desc("Override output filename"), 38 cl::value_desc("filename"), 39 cl::cat(SplitCategory)); 40 41 static cl::opt<unsigned> NumOutputs("j", cl::Prefix, cl::init(2), 42 cl::desc("Number of output files"), 43 cl::cat(SplitCategory)); 44 45 static cl::opt<bool> 46 PreserveLocals("preserve-locals", cl::Prefix, cl::init(false), 47 cl::desc("Split without externalizing locals"), 48 cl::cat(SplitCategory)); 49 50 int main(int argc, char **argv) { 51 LLVMContext Context; 52 SMDiagnostic Err; 53 cl::HideUnrelatedOptions({&SplitCategory, &getColorCategory()}); 54 cl::ParseCommandLineOptions(argc, argv, "LLVM module splitter\n"); 55 56 std::unique_ptr<Module> M = parseIRFile(InputFilename, Err, Context); 57 58 if (!M) { 59 Err.print(argv[0], errs()); 60 return 1; 61 } 62 63 unsigned I = 0; 64 SplitModule( 65 *M, NumOutputs, 66 [&](std::unique_ptr<Module> MPart) { 67 std::error_code EC; 68 std::unique_ptr<ToolOutputFile> Out(new ToolOutputFile( 69 OutputFilename + utostr(I++), EC, sys::fs::OF_None)); 70 if (EC) { 71 errs() << EC.message() << '\n'; 72 exit(1); 73 } 74 75 if (verifyModule(*MPart, &errs())) { 76 errs() << "Broken module!\n"; 77 exit(1); 78 } 79 80 WriteBitcodeToFile(*MPart, Out->os()); 81 82 // Declare success. 83 Out->keep(); 84 }, 85 PreserveLocals); 86 87 return 0; 88 } 89