bugpoint.cpp revision c4bb052ecccfafa0ffa928d0b061db35734ee2ee 
1//===- bugpoint.cpp - The LLVM Bugpoint utility ---------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file was developed by the LLVM research group and is distributed under
6// the University of Illinois Open Source License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This program is an automated compiler debugger tool.  It is used to narrow
11// down miscompilations and crash problems to a specific pass in the compiler,
12// and the specific Module or Function input that is causing the problem.
13//
14//===----------------------------------------------------------------------===//
15
16#include "BugDriver.h"
17#include "llvm/Analysis/LinkAllAnalyses.h"
18#include "llvm/Transforms/LinkAllPasses.h"
19#include "llvm/Support/PassNameParser.h"
20#include "llvm/Support/ToolRunner.h"
21#include "llvm/Support/CommandLine.h"
22#include "llvm/Support/PluginLoader.h"
23#include "llvm/System/Process.h"
24#include "llvm/System/Signals.h"
25using namespace llvm;
26
27// AsChild - Specifies that this invocation of bugpoint is being generated
28// from a parent process. It is not intended to be used by users so the
29// option is hidden.
30static cl::opt<bool>
31  AsChild("as-child", cl::desc("Run bugpoint as child process"),
32          cl::ReallyHidden);
33
34static cl::list<std::string>
35InputFilenames(cl::Positional, cl::OneOrMore,
36               cl::desc("<input llvm ll/bc files>"));
37
38// The AnalysesList is automatically populated with registered Passes by the
39// PassNameParser.
40//
41static cl::list<const PassInfo*, bool, PassNameParser>
42PassList(cl::desc("Passes available:"), cl::ZeroOrMore);
43
44/// BugpointIsInterrupted - Set to true when the user presses ctrl-c.
45bool llvm::BugpointIsInterrupted = false;
46
47static void BugpointInterruptFunction() {
48  BugpointIsInterrupted = true;
49}
50
51int main(int argc, char **argv) {
52  cl::ParseCommandLineOptions(argc, argv,
53                              " LLVM automatic testcase reducer. See\nhttp://"
54                              "llvm.cs.uiuc.edu/docs/CommandGuide/bugpoint.html"
55                              " for more information.\n");
56  sys::PrintStackTraceOnErrorSignal();
57  sys::SetInterruptFunction(BugpointInterruptFunction);
58
59  BugDriver D(argv[0],AsChild);
60  if (D.addSources(InputFilenames)) return 1;
61  D.addPasses(PassList.begin(), PassList.end());
62
63  // Bugpoint has the ability of generating a plethora of core files, so to
64  // avoid filling up the disk, we prevent it
65  sys::Process::PreventCoreFiles();
66
67  try {
68    return D.run();
69  } catch (ToolExecutionError &TEE) {
70    std::cerr << "Tool execution error: " << TEE.what() << '\n';
71  } catch (const std::string& msg) {
72    std::cerr << argv[0] << ": " << msg << "\n";
73  } catch (...) {
74    std::cerr << "Whoops, an exception leaked out of bugpoint.  "
75              << "This is a bug in bugpoint!\n";
76  }
77  return 1;
78}
79