llvm/tools/bugpoint/bugpoint.cpp
Justin Bogner d8090aef78 bugpoint: Return Errors instead of passing around strings
This replaces the threading of `std::string &Error` through all of
these APIs with checked Error returns instead. There are very few
places here that actually emit any errors right now, but threading the
APIs through will allow us to replace a bunch of exit(1)'s that are
scattered through this code with proper error handling.

This is more or less NFC, but does move around where a couple of error
messages are printed out.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@280720 91177308-0d34-0410-b5e6-96231b3b80d8
2016-09-06 17:18:22 +00:00

206 lines
6.4 KiB
C++

//===- 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/LegacyPassManager.h"
#include "llvm/IR/LegacyPassNameParser.h"
#include "llvm/LinkAllIR.h"
#include "llvm/LinkAllPasses.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/AlwaysInliner.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 400MB (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>
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> OptLevelOs(
"Os",
cl::desc(
"Like -O2 with extra optimizations for size. Similar to clang -Os"));
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 legacy::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(argv[0]);
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);
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;
// 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 = 400;
}
BugDriver D(argv[0], FindBugs, TimeoutValue, MemoryLimit, UseValgrind,
Context);
if (D.addSources(InputFilenames))
return 1;
AddToDriver PM(D);
if (StandardLinkOpts) {
PassManagerBuilder Builder;
Builder.Inliner = createFunctionInliningPass();
Builder.populateLTOPassManager(PM);
}
if (OptLevelO1 || OptLevelO2 || OptLevelO3) {
PassManagerBuilder Builder;
if (OptLevelO1)
Builder.Inliner = createAlwaysInlinerLegacyPass();
else if (OptLevelOs || OptLevelO2)
Builder.Inliner = createFunctionInliningPass(2, OptLevelOs ? 1 : 0);
else
Builder.Inliner = createFunctionInliningPass(275);
Builder.populateFunctionPassManager(PM);
Builder.populateModulePassManager(PM);
}
for (const PassInfo *PI : PassList)
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
if (Error E = D.run()) {
errs() << toString(std::move(E));
return 1;
}
return 0;
}