bugpoint.cpp revision cc14d25dd99e891c586bd56aa41796abbe4ac3d8 
1//===- bugpoint.cpp - The LLVM Bugpoint utility ---------------------------===//
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 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/LinkAllPasses.h"
19#include "llvm/Support/PassNameParser.h"
20#include "llvm/Support/CommandLine.h"
21#include "llvm/Support/ManagedStatic.h"
22#include "llvm/Support/PluginLoader.h"
23#include "llvm/Support/PrettyStackTrace.h"
24#include "llvm/System/Process.h"
25#include "llvm/System/Signals.h"
26#include "llvm/LinkAllVMCore.h"
27#include <iostream>
28using namespace llvm;
29
30// AsChild - Specifies that this invocation of bugpoint is being generated
31// from a parent process. It is not intended to be used by users so the
32// option is hidden.
33static cl::opt<bool>
34AsChild("as-child", cl::desc("Run bugpoint as child process"),
35        cl::ReallyHidden);
36
37static cl::opt<bool>
38FindBugs("find-bugs", cl::desc("Run many different optimization sequences "
39                               "on program to find bugs"), cl::init(false));
40
41static cl::list<std::string>
42InputFilenames(cl::Positional, cl::OneOrMore,
43               cl::desc("<input llvm ll/bc files>"));
44
45static cl::opt<unsigned>
46TimeoutValue("timeout", cl::init(300), cl::value_desc("seconds"),
47             cl::desc("Number of seconds program is allowed to run before it "
48                      "is killed (default is 300s), 0 disables timeout"));
49
50static cl::opt<unsigned>
51MemoryLimit("mlimit", cl::init(100), cl::value_desc("MBytes"),
52             cl::desc("Maximum amount of memory to use. 0 disables check."));
53
54// The AnalysesList is automatically populated with registered Passes by the
55// PassNameParser.
56//
57static cl::list<const PassInfo*, bool, PassNameParser>
58PassList(cl::desc("Passes available:"), cl::ZeroOrMore);
59
60/// BugpointIsInterrupted - Set to true when the user presses ctrl-c.
61bool llvm::BugpointIsInterrupted = false;
62
63static void BugpointInterruptFunction() {
64  BugpointIsInterrupted = true;
65}
66
67int main(int argc, char **argv) {
68  llvm::sys::PrintStackTraceOnErrorSignal();
69  llvm::PrettyStackTraceProgram X(argc, argv);
70  llvm_shutdown_obj Y;  // Call llvm_shutdown() on exit.
71  cl::ParseCommandLineOptions(argc, argv,
72                              "LLVM automatic testcase reducer. See\nhttp://"
73                              "llvm.org/cmds/bugpoint.html"
74                              " for more information.\n");
75  sys::SetInterruptFunction(BugpointInterruptFunction);
76
77  BugDriver D(argv[0], AsChild, FindBugs, TimeoutValue, MemoryLimit);
78  if (D.addSources(InputFilenames)) return 1;
79  D.addPasses(PassList.begin(), PassList.end());
80
81  // Bugpoint has the ability of generating a plethora of core files, so to
82  // avoid filling up the disk, we prevent it
83  sys::Process::PreventCoreFiles();
84
85  try {
86    return D.run();
87  } catch (ToolExecutionError &TEE) {
88    std::cerr << "Tool execution error: " << TEE.what() << '\n';
89  } catch (const std::string& msg) {
90    std::cerr << argv[0] << ": " << msg << "\n";
91  } catch (...) {
92    std::cerr << "Whoops, an exception leaked out of bugpoint.  "
93              << "This is a bug in bugpoint!\n";
94  }
95  return 1;
96}
97