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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/IR/LLVMContext.h"
#include "llvm/IR/LegacyPassNameParser.h"
#include "llvm/LinkAllIR.h"
#include "llvm/LinkAllPasses.h"
#include "llvm/PassManager.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/PluginLoader.h"
#include "llvm/Support/PrettyStackTrace.h"
#include "llvm/Support/Process.h"
#include "llvm/Support/Signals.h"
#include "llvm/Support/Valgrind.h"
#include "llvm/Transforms/IPO/PassManagerBuilder.h"
//Enable this macro to debug bugpoint itself.
//#define DEBUG_BUGPOINT 1
using namespace llvm;
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<int>
MemoryLimit("mlimit", cl::init(-1), cl::value_desc("MBytes"),
cl::desc("Maximum amount of memory to use. 0 disables check."
" Defaults to 300MB (800MB under valgrind)."));
static cl::opt<bool>
UseValgrind("enable-valgrind",
cl::desc("Run optimizations through valgrind"));
// 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<bool>
OptLevelO1("O1",
cl::desc("Optimization level 1. Identical to 'opt -O1'"));
static cl::opt<bool>
OptLevelO2("O2",
cl::desc("Optimization level 2. Identical to 'opt -O2'"));
static cl::opt<bool>
OptLevelO3("O3",
cl::desc("Optimization level 3. Identical to 'opt -O3'"));
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;
#ifndef DEBUG_BUGPOINT
static void BugpointInterruptFunction() {
BugpointIsInterrupted = true;
}
#endif
// Hack to capture a pass list.
namespace {
class AddToDriver : public FunctionPassManager {
BugDriver &D;
public:
AddToDriver(BugDriver &_D) : FunctionPassManager(nullptr), D(_D) {}
void add(Pass *P) override {
const void *ID = P->getPassID();
const PassInfo *PI = PassRegistry::getPassRegistry()->getPassInfo(ID);
D.addPass(PI->getPassArgument());
}
};
}
#ifdef LINK_POLLY_INTO_TOOLS
namespace polly {
void initializePollyPasses(llvm::PassRegistry &Registry);
}
#endif
int main(int argc, char **argv) {
#ifndef DEBUG_BUGPOINT
llvm::sys::PrintStackTraceOnErrorSignal();
llvm::PrettyStackTraceProgram X(argc, argv);
llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
#endif
// Initialize passes
PassRegistry &Registry = *PassRegistry::getPassRegistry();
initializeCore(Registry);
initializeScalarOpts(Registry);
initializeObjCARCOpts(Registry);
initializeVectorization(Registry);
initializeIPO(Registry);
initializeAnalysis(Registry);
initializeIPA(Registry);
initializeTransformUtils(Registry);
initializeInstCombine(Registry);
initializeInstrumentation(Registry);
initializeTarget(Registry);
#ifdef LINK_POLLY_INTO_TOOLS
polly::initializePollyPasses(Registry);
#endif
cl::ParseCommandLineOptions(argc, argv,
"LLVM automatic testcase reducer. See\nhttp://"
"llvm.org/cmds/bugpoint.html"
" for more information.\n");
#ifndef DEBUG_BUGPOINT
sys::SetInterruptFunction(BugpointInterruptFunction);
#endif
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(Triple::normalize(OverrideTriple));
outs() << "Override triple set to '" << TargetTriple.getTriple() << "'\n";
}
if (MemoryLimit < 0) {
// Set the default MemoryLimit. Be sure to update the flag's description if
// you change this.
if (sys::RunningOnValgrind() || UseValgrind)
MemoryLimit = 800;
else
MemoryLimit = 300;
}
BugDriver D(argv[0], FindBugs, TimeoutValue, MemoryLimit,
UseValgrind, Context);
if (D.addSources(InputFilenames)) return 1;
AddToDriver PM(D);
if (StandardCompileOpts) {
PassManagerBuilder Builder;
Builder.OptLevel = 3;
Builder.Inliner = createFunctionInliningPass();
Builder.populateModulePassManager(PM);
}
if (StandardLinkOpts) {
PassManagerBuilder Builder;
Builder.populateLTOPassManager(PM, /*Internalize=*/true,
/*RunInliner=*/true);
}
if (OptLevelO1 || OptLevelO2 || OptLevelO3) {
PassManagerBuilder Builder;
if (OptLevelO1)
Builder.Inliner = createAlwaysInlinerPass();
else if (OptLevelO2)
Builder.Inliner = createFunctionInliningPass(225);
else
Builder.Inliner = createFunctionInliningPass(275);
// Note that although clang/llvm-gcc use two separate passmanagers
// here, it shouldn't normally make a difference.
Builder.populateFunctionPassManager(PM);
Builder.populateModulePassManager(PM);
}
for (std::vector<const PassInfo*>::iterator I = PassList.begin(),
E = PassList.end();
I != E; ++I) {
const PassInfo* PI = *I;
D.addPass(PI->getPassArgument());
}
// Bugpoint has the ability of generating a plethora of core files, so to
// avoid filling up the disk, we prevent it
#ifndef DEBUG_BUGPOINT
sys::Process::PreventCoreFiles();
#endif
std::string Error;
bool Failure = D.run(Error);
if (!Error.empty()) {
errs() << Error;
return 1;
}
return Failure;
}
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