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/IR/LLVMContext.h" 19 #include "llvm/IR/LegacyPassManager.h" 20 #include "llvm/IR/LegacyPassNameParser.h" 21 #include "llvm/LinkAllIR.h" 22 #include "llvm/LinkAllPasses.h" 23 #include "llvm/Support/CommandLine.h" 24 #include "llvm/Support/ManagedStatic.h" 25 #include "llvm/Support/PluginLoader.h" 26 #include "llvm/Support/PrettyStackTrace.h" 27 #include "llvm/Support/Process.h" 28 #include "llvm/Support/Signals.h" 29 #include "llvm/Support/Valgrind.h" 30 #include "llvm/Transforms/IPO/PassManagerBuilder.h" 31 32 //Enable this macro to debug bugpoint itself. 33 //#define DEBUG_BUGPOINT 1 34 35 using namespace llvm; 36 37 static cl::opt<bool> 38 FindBugs("find-bugs", cl::desc("Run many different optimization sequences " 39 "on program to find bugs"), cl::init(false)); 40 41 static cl::list<std::string> 42 InputFilenames(cl::Positional, cl::OneOrMore, 43 cl::desc("<input llvm ll/bc files>")); 44 45 static cl::opt<unsigned> 46 TimeoutValue("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 50 static cl::opt<int> 51 MemoryLimit("mlimit", cl::init(-1), cl::value_desc("MBytes"), 52 cl::desc("Maximum amount of memory to use. 0 disables check." 53 " Defaults to 400MB (800MB under valgrind).")); 54 55 static cl::opt<bool> 56 UseValgrind("enable-valgrind", 57 cl::desc("Run optimizations through valgrind")); 58 59 // The AnalysesList is automatically populated with registered Passes by the 60 // PassNameParser. 61 // 62 static cl::list<const PassInfo*, bool, PassNameParser> 63 PassList(cl::desc("Passes available:"), cl::ZeroOrMore); 64 65 static cl::opt<bool> 66 StandardLinkOpts("std-link-opts", 67 cl::desc("Include the standard link time optimizations")); 68 69 static cl::opt<bool> 70 OptLevelO1("O1", 71 cl::desc("Optimization level 1. Identical to 'opt -O1'")); 72 73 static cl::opt<bool> 74 OptLevelO2("O2", 75 cl::desc("Optimization level 2. Identical to 'opt -O2'")); 76 77 static cl::opt<bool> 78 OptLevelO3("O3", 79 cl::desc("Optimization level 3. Identical to 'opt -O3'")); 80 81 static cl::opt<std::string> 82 OverrideTriple("mtriple", cl::desc("Override target triple for module")); 83 84 /// BugpointIsInterrupted - Set to true when the user presses ctrl-c. 85 bool llvm::BugpointIsInterrupted = false; 86 87 #ifndef DEBUG_BUGPOINT 88 static void BugpointInterruptFunction() { 89 BugpointIsInterrupted = true; 90 } 91 #endif 92 93 // Hack to capture a pass list. 94 namespace { 95 class AddToDriver : public legacy::FunctionPassManager { 96 BugDriver &D; 97 public: 98 AddToDriver(BugDriver &_D) : FunctionPassManager(nullptr), D(_D) {} 99 100 void add(Pass *P) override { 101 const void *ID = P->getPassID(); 102 const PassInfo *PI = PassRegistry::getPassRegistry()->getPassInfo(ID); 103 D.addPass(PI->getPassArgument()); 104 } 105 }; 106 } 107 108 #ifdef LINK_POLLY_INTO_TOOLS 109 namespace polly { 110 void initializePollyPasses(llvm::PassRegistry &Registry); 111 } 112 #endif 113 114 int main(int argc, char **argv) { 115 #ifndef DEBUG_BUGPOINT 116 llvm::sys::PrintStackTraceOnErrorSignal(argv[0]); 117 llvm::PrettyStackTraceProgram X(argc, argv); 118 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit. 119 #endif 120 121 // Initialize passes 122 PassRegistry &Registry = *PassRegistry::getPassRegistry(); 123 initializeCore(Registry); 124 initializeScalarOpts(Registry); 125 initializeObjCARCOpts(Registry); 126 initializeVectorization(Registry); 127 initializeIPO(Registry); 128 initializeAnalysis(Registry); 129 initializeTransformUtils(Registry); 130 initializeInstCombine(Registry); 131 initializeInstrumentation(Registry); 132 initializeTarget(Registry); 133 134 #ifdef LINK_POLLY_INTO_TOOLS 135 polly::initializePollyPasses(Registry); 136 #endif 137 138 cl::ParseCommandLineOptions(argc, argv, 139 "LLVM automatic testcase reducer. See\nhttp://" 140 "llvm.org/cmds/bugpoint.html" 141 " for more information.\n"); 142 #ifndef DEBUG_BUGPOINT 143 sys::SetInterruptFunction(BugpointInterruptFunction); 144 #endif 145 146 LLVMContext Context; 147 // If we have an override, set it and then track the triple we want Modules 148 // to use. 149 if (!OverrideTriple.empty()) { 150 TargetTriple.setTriple(Triple::normalize(OverrideTriple)); 151 outs() << "Override triple set to '" << TargetTriple.getTriple() << "'\n"; 152 } 153 154 if (MemoryLimit < 0) { 155 // Set the default MemoryLimit. Be sure to update the flag's description if 156 // you change this. 157 if (sys::RunningOnValgrind() || UseValgrind) 158 MemoryLimit = 800; 159 else 160 MemoryLimit = 400; 161 } 162 163 BugDriver D(argv[0], FindBugs, TimeoutValue, MemoryLimit, 164 UseValgrind, Context); 165 if (D.addSources(InputFilenames)) return 1; 166 167 AddToDriver PM(D); 168 169 if (StandardLinkOpts) { 170 PassManagerBuilder Builder; 171 Builder.Inliner = createFunctionInliningPass(); 172 Builder.populateLTOPassManager(PM); 173 } 174 175 if (OptLevelO1 || OptLevelO2 || OptLevelO3) { 176 PassManagerBuilder Builder; 177 if (OptLevelO1) 178 Builder.Inliner = createAlwaysInlinerPass(); 179 else if (OptLevelO2) 180 Builder.Inliner = createFunctionInliningPass(225); 181 else 182 Builder.Inliner = createFunctionInliningPass(275); 183 Builder.populateFunctionPassManager(PM); 184 Builder.populateModulePassManager(PM); 185 } 186 187 for (const PassInfo *PI : PassList) 188 D.addPass(PI->getPassArgument()); 189 190 // Bugpoint has the ability of generating a plethora of core files, so to 191 // avoid filling up the disk, we prevent it 192 #ifndef DEBUG_BUGPOINT 193 sys::Process::PreventCoreFiles(); 194 #endif 195 196 std::string Error; 197 bool Failure = D.run(Error); 198 if (!Error.empty()) { 199 errs() << Error; 200 return 1; 201 } 202 return Failure; 203 } 204
