bugpoint.cpp revision e3f056154537194afd06c1940de72d4b6f2f4147 
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 "ToolRunner.h"
18#include "llvm/Analysis/LinkAllAnalyses.h"
19#include "llvm/Transforms/LinkAllPasses.h"
20#include "llvm/Support/PassNameParser.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"
25#include "llvm/LinkAllVMCore.h"
26using namespace llvm;
27
28// AsChild - Specifies that this invocation of bugpoint is being generated
29// from a parent process. It is not intended to be used by users so the
30// option is hidden.
31static cl::opt<bool>
32  AsChild("as-child", cl::desc("Run bugpoint as child process"),
33          cl::ReallyHidden);
34
35static cl::list<std::string>
36InputFilenames(cl::Positional, cl::OneOrMore,
37               cl::desc("<input llvm ll/bc files>"));
38
39// The AnalysesList is automatically populated with registered Passes by the
40// PassNameParser.
41//
42static cl::list<const PassInfo*, bool, PassNameParser>
43PassList(cl::desc("Passes available:"), cl::ZeroOrMore);
44
45/// BugpointIsInterrupted - Set to true when the user presses ctrl-c.
46bool llvm::BugpointIsInterrupted = false;
47
48static void BugpointInterruptFunction() {
49  BugpointIsInterrupted = true;
50}
51
52int main(int argc, char **argv) {
53  cl::ParseCommandLineOptions(argc, argv,
54                              " LLVM automatic testcase reducer. See\nhttp://"
55                              "llvm.org/docs/CommandGuide/bugpoint.html"
56                              " for more information.\n");
57  sys::PrintStackTraceOnErrorSignal();
58  sys::SetInterruptFunction(BugpointInterruptFunction);
59
60  BugDriver D(argv[0],AsChild);
61  if (D.addSources(InputFilenames)) return 1;
62  D.addPasses(PassList.begin(), PassList.end());
63
64  // Bugpoint has the ability of generating a plethora of core files, so to
65  // avoid filling up the disk, we prevent it
66  sys::Process::PreventCoreFiles();
67
68  try {
69    return D.run();
70  } catch (ToolExecutionError &TEE) {
71    std::cerr << "Tool execution error: " << TEE.what() << '\n';
72  } catch (const std::string& msg) {
73    std::cerr << argv[0] << ": " << msg << "\n";
74  } catch (...) {
75    std::cerr << "Whoops, an exception leaked out of bugpoint.  "
76              << "This is a bug in bugpoint!\n";
77  }
78  return 1;
79}
80