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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
220 lines
6.9 KiB
C++
220 lines
6.9 KiB
C++
//===- bugpoint.cpp - The LLVM Bugpoint utility ---------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This program is an automated compiler debugger tool. It is used to narrow
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// down miscompilations and crash problems to a specific pass in the compiler,
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// and the specific Module or Function input that is causing the problem.
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//
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//===----------------------------------------------------------------------===//
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#include "BugDriver.h"
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#include "ToolRunner.h"
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#include "llvm/Config/llvm-config.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/LegacyPassManager.h"
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#include "llvm/IR/LegacyPassNameParser.h"
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#include "llvm/LinkAllIR.h"
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#include "llvm/LinkAllPasses.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/InitLLVM.h"
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#include "llvm/Support/ManagedStatic.h"
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#include "llvm/Support/PluginLoader.h"
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#include "llvm/Support/PrettyStackTrace.h"
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#include "llvm/Support/Process.h"
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#include "llvm/Support/TargetSelect.h"
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#include "llvm/Support/Valgrind.h"
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#include "llvm/Transforms/IPO/AlwaysInliner.h"
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#include "llvm/Transforms/IPO/PassManagerBuilder.h"
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// Enable this macro to debug bugpoint itself.
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//#define DEBUG_BUGPOINT 1
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using namespace llvm;
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static cl::opt<bool>
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FindBugs("find-bugs", cl::desc("Run many different optimization sequences "
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"on program to find bugs"),
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cl::init(false));
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static cl::list<std::string>
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InputFilenames(cl::Positional, cl::OneOrMore,
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cl::desc("<input llvm ll/bc files>"));
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static cl::opt<unsigned> TimeoutValue(
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"timeout", cl::init(300), cl::value_desc("seconds"),
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cl::desc("Number of seconds program is allowed to run before it "
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"is killed (default is 300s), 0 disables timeout"));
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static cl::opt<int> MemoryLimit(
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"mlimit", cl::init(-1), cl::value_desc("MBytes"),
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cl::desc("Maximum amount of memory to use. 0 disables check. Defaults to "
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"400MB (800MB under valgrind, 0 with sanitizers)."));
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static cl::opt<bool>
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UseValgrind("enable-valgrind",
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cl::desc("Run optimizations through valgrind"));
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// The AnalysesList is automatically populated with registered Passes by the
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// PassNameParser.
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//
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static cl::list<const PassInfo *, bool, PassNameParser>
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PassList(cl::desc("Passes available:"), cl::ZeroOrMore);
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static cl::opt<bool>
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StandardLinkOpts("std-link-opts",
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cl::desc("Include the standard link time optimizations"));
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static cl::opt<bool>
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OptLevelO1("O1", cl::desc("Optimization level 1. Identical to 'opt -O1'"));
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static cl::opt<bool>
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OptLevelO2("O2", cl::desc("Optimization level 2. Identical to 'opt -O2'"));
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static cl::opt<bool> OptLevelOs(
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"Os",
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cl::desc(
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"Like -O2 with extra optimizations for size. Similar to clang -Os"));
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static cl::opt<bool>
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OptLevelO3("O3", cl::desc("Optimization level 3. Identical to 'opt -O3'"));
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static cl::opt<std::string>
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OverrideTriple("mtriple", cl::desc("Override target triple for module"));
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/// BugpointIsInterrupted - Set to true when the user presses ctrl-c.
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bool llvm::BugpointIsInterrupted = false;
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#ifndef DEBUG_BUGPOINT
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static void BugpointInterruptFunction() { BugpointIsInterrupted = true; }
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#endif
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// Hack to capture a pass list.
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namespace {
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class AddToDriver : public legacy::FunctionPassManager {
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BugDriver &D;
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public:
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AddToDriver(BugDriver &_D) : FunctionPassManager(nullptr), D(_D) {}
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void add(Pass *P) override {
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const void *ID = P->getPassID();
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const PassInfo *PI = PassRegistry::getPassRegistry()->getPassInfo(ID);
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D.addPass(PI->getPassArgument());
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}
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};
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}
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#ifdef LINK_POLLY_INTO_TOOLS
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namespace polly {
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void initializePollyPasses(llvm::PassRegistry &Registry);
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}
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#endif
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int main(int argc, char **argv) {
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#ifndef DEBUG_BUGPOINT
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InitLLVM X(argc, argv);
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#endif
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// Initialize passes
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PassRegistry &Registry = *PassRegistry::getPassRegistry();
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initializeCore(Registry);
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initializeScalarOpts(Registry);
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initializeObjCARCOpts(Registry);
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initializeVectorization(Registry);
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initializeIPO(Registry);
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initializeAnalysis(Registry);
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initializeTransformUtils(Registry);
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initializeInstCombine(Registry);
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initializeAggressiveInstCombine(Registry);
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initializeInstrumentation(Registry);
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initializeTarget(Registry);
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#ifdef LINK_POLLY_INTO_TOOLS
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polly::initializePollyPasses(Registry);
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#endif
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if (std::getenv("bar") == (char*) -1) {
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InitializeAllTargets();
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InitializeAllTargetMCs();
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InitializeAllAsmPrinters();
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InitializeAllAsmParsers();
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}
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cl::ParseCommandLineOptions(argc, argv,
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"LLVM automatic testcase reducer. See\nhttp://"
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"llvm.org/cmds/bugpoint.html"
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" for more information.\n");
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#ifndef DEBUG_BUGPOINT
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sys::SetInterruptFunction(BugpointInterruptFunction);
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#endif
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LLVMContext Context;
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// If we have an override, set it and then track the triple we want Modules
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// to use.
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if (!OverrideTriple.empty()) {
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TargetTriple.setTriple(Triple::normalize(OverrideTriple));
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outs() << "Override triple set to '" << TargetTriple.getTriple() << "'\n";
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}
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if (MemoryLimit < 0) {
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// Set the default MemoryLimit. Be sure to update the flag's description if
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// you change this.
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if (sys::RunningOnValgrind() || UseValgrind)
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MemoryLimit = 800;
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else
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MemoryLimit = 400;
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#if (LLVM_ADDRESS_SANITIZER_BUILD || LLVM_MEMORY_SANITIZER_BUILD || \
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LLVM_THREAD_SANITIZER_BUILD)
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// Starting from kernel 4.9 memory allocated with mmap is counted against
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// RLIMIT_DATA. Sanitizers need to allocate tens of terabytes for shadow.
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MemoryLimit = 0;
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#endif
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}
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BugDriver D(argv[0], FindBugs, TimeoutValue, MemoryLimit, UseValgrind,
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Context);
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if (D.addSources(InputFilenames))
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return 1;
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AddToDriver PM(D);
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if (StandardLinkOpts) {
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PassManagerBuilder Builder;
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Builder.Inliner = createFunctionInliningPass();
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Builder.populateLTOPassManager(PM);
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}
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if (OptLevelO1 || OptLevelO2 || OptLevelO3) {
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PassManagerBuilder Builder;
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if (OptLevelO1)
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Builder.Inliner = createAlwaysInlinerLegacyPass();
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else if (OptLevelOs || OptLevelO2)
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Builder.Inliner = createFunctionInliningPass(
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2, OptLevelOs ? 1 : 0, false);
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else
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Builder.Inliner = createFunctionInliningPass(275);
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Builder.populateFunctionPassManager(PM);
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Builder.populateModulePassManager(PM);
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}
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for (const PassInfo *PI : PassList)
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D.addPass(PI->getPassArgument());
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// Bugpoint has the ability of generating a plethora of core files, so to
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// avoid filling up the disk, we prevent it
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#ifndef DEBUG_BUGPOINT
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sys::Process::PreventCoreFiles();
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#endif
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if (Error E = D.run()) {
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errs() << toString(std::move(E));
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return 1;
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}
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return 0;
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}
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