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//===- bugpoint.cpp - The LLVM Bugpoint utility ---------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This program is an automated compiler debugger tool. It is used to narrow
// down miscompilations and crash problems to a specific pass in the compiler,
// and the specific Module or Function input that is causing the problem.
//
//===----------------------------------------------------------------------===//
#include "BugDriver.h"
#include "ToolRunner.h"
#include "llvm/LinkAllPasses.h"
#include "llvm/LLVMContext.h"
#include "llvm/Support/PassNameParser.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/PluginLoader.h"
#include "llvm/Support/PrettyStackTrace.h"
#include "llvm/Support/StandardPasses.h"
#include "llvm/System/Process.h"
#include "llvm/System/Signals.h"
#include "llvm/LinkAllVMCore.h"
using namespace llvm;
// AsChild - Specifies that this invocation of bugpoint is being generated
// from a parent process. It is not intended to be used by users so the
// option is hidden.
static cl::opt<bool>
AsChild("as-child", cl::desc("Run bugpoint as child process"),
cl::ReallyHidden);
static cl::opt<bool>
FindBugs("find-bugs", cl::desc("Run many different optimization sequences "
"on program to find bugs"), cl::init(false));
static cl::list<std::string>
InputFilenames(cl::Positional, cl::OneOrMore,
cl::desc("<input llvm ll/bc files>"));
static cl::opt<unsigned>
TimeoutValue("timeout", cl::init(300), cl::value_desc("seconds"),
cl::desc("Number of seconds program is allowed to run before it "
"is killed (default is 300s), 0 disables timeout"));
static cl::opt<unsigned>
MemoryLimit("mlimit", cl::init(100), cl::value_desc("MBytes"),
cl::desc("Maximum amount of memory to use. 0 disables check."));
// The AnalysesList is automatically populated with registered Passes by the
// PassNameParser.
//
static cl::list<const PassInfo*, bool, PassNameParser>
PassList(cl::desc("Passes available:"), cl::ZeroOrMore);
static cl::opt<bool>
StandardCompileOpts("std-compile-opts",
cl::desc("Include the standard compile time optimizations"));
static cl::opt<bool>
StandardLinkOpts("std-link-opts",
cl::desc("Include the standard link time optimizations"));
static cl::opt<std::string>
OverrideTriple("mtriple", cl::desc("Override target triple for module"));
/// BugpointIsInterrupted - Set to true when the user presses ctrl-c.
bool llvm::BugpointIsInterrupted = false;
static void BugpointInterruptFunction() {
BugpointIsInterrupted = true;
}
// Hack to capture a pass list.
namespace {
class AddToDriver : public PassManager {
BugDriver &D;
public:
AddToDriver(BugDriver &_D) : D(_D) {}
virtual void add(Pass *P) {
const PassInfo *PI = P->getPassInfo();
D.addPasses(&PI, &PI + 1);
}
};
}
int main(int argc, char **argv) {
llvm::sys::PrintStackTraceOnErrorSignal();
llvm::PrettyStackTraceProgram X(argc, argv);
llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
cl::ParseCommandLineOptions(argc, argv,
"LLVM automatic testcase reducer. See\nhttp://"
"llvm.org/cmds/bugpoint.html"
" for more information.\n");
sys::SetInterruptFunction(BugpointInterruptFunction);
LLVMContext& Context = getGlobalContext();
// If we have an override, set it and then track the triple we want Modules
// to use.
if (!OverrideTriple.empty())
TargetTriple.setTriple(OverrideTriple);
outs() << "override triple is " << OverrideTriple << '\n';
BugDriver D(argv[0], AsChild, FindBugs, TimeoutValue, MemoryLimit, Context);
if (D.addSources(InputFilenames)) return 1;
AddToDriver PM(D);
if (StandardCompileOpts) {
createStandardModulePasses(&PM, 3,
/*OptimizeSize=*/ false,
/*UnitAtATime=*/ true,
/*UnrollLoops=*/ true,
/*SimplifyLibCalls=*/ true,
/*HaveExceptions=*/ true,
createFunctionInliningPass());
}
if (StandardLinkOpts)
createStandardLTOPasses(&PM, /*Internalize=*/true,
/*RunInliner=*/true,
/*VerifyEach=*/false);
D.addPasses(PassList.begin(), PassList.end());
// Bugpoint has the ability of generating a plethora of core files, so to
// avoid filling up the disk, we prevent it
sys::Process::PreventCoreFiles();
try {
return D.run();
} catch (ToolExecutionError &TEE) {
errs() << "Tool execution error: " << TEE.what() << '\n';
} catch (const std::string& msg) {
errs() << argv[0] << ": " << msg << "\n";
} catch (const std::bad_alloc&) {
errs() << "Oh no, a bugpoint process ran out of memory!\n"
"To increase the allocation limits for bugpoint child\n"
"processes, use the -mlimit option.\n";
} catch (const std::exception &e) {
errs() << "Whoops, a std::exception leaked out of bugpoint: "
<< e.what() << "\n"
<< "This is a bug in bugpoint!\n";
} catch (...) {
errs() << "Whoops, an exception leaked out of bugpoint. "
<< "This is a bug in bugpoint!\n";
}
return 1;
}
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