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/BitcodeWriter.h"
16 #include "llvm/IR/LLVMContext.h"
17 #include "llvm/IR/Verifier.h"
18 #include "llvm/IRReader/IRReader.h"
19 #include "llvm/Support/CommandLine.h"
20 #include "llvm/Support/FileSystem.h"
21 #include "llvm/Support/SourceMgr.h"
22 #include "llvm/Support/ToolOutputFile.h"
23 #include "llvm/Support/raw_ostream.h"
24 #include "llvm/Transforms/Utils/SplitModule.h"
25
26 using namespace llvm;
27
28 static cl::opt<std::string>
29 InputFilename(cl::Positional, cl::desc("<input bitcode file>"),
30 cl::init("-"), cl::value_desc("filename"));
31
32 static cl::opt<std::string>
33 OutputFilename("o", cl::desc("Override output filename"),
34 cl::value_desc("filename"));
35
36 static cl::opt<unsigned> NumOutputs("j", cl::Prefix, cl::init(2),
37 cl::desc("Number of output files"));
38
39 static cl::opt<bool>
40 PreserveLocals("preserve-locals", cl::Prefix, cl::init(false),
41 cl::desc("Split without externalizing locals"));
42
main(int argc,char ** argv)43 int main(int argc, char **argv) {
44 LLVMContext Context;
45 SMDiagnostic Err;
46 cl::ParseCommandLineOptions(argc, argv, "LLVM module splitter\n");
47
48 std::unique_ptr<Module> M = parseIRFile(InputFilename, Err, Context);
49
50 if (!M) {
51 Err.print(argv[0], errs());
52 return 1;
53 }
54
55 unsigned I = 0;
56 SplitModule(std::move(M), NumOutputs, [&](std::unique_ptr<Module> MPart) {
57 std::error_code EC;
58 std::unique_ptr<ToolOutputFile> Out(
59 new ToolOutputFile(OutputFilename + utostr(I++), EC, sys::fs::F_None));
60 if (EC) {
61 errs() << EC.message() << '\n';
62 exit(1);
63 }
64
65 verifyModule(*MPart);
66 WriteBitcodeToFile(*MPart, Out->os());
67
68 // Declare success.
69 Out->keep();
70 }, PreserveLocals);
71
72 return 0;
73 }
74