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
main(int argc,char ** argv)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