1 //===- bugpoint.cpp - The LLVM Bugpoint utility ---------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
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.
14 //===----------------------------------------------------------------------===//
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/TargetSelect.h"
30 #include "llvm/Support/Valgrind.h"
31 #include "llvm/Transforms/IPO/AlwaysInliner.h"
32 #include "llvm/Transforms/IPO/PassManagerBuilder.h"
34 // Enable this macro to debug bugpoint itself.
35 //#define DEBUG_BUGPOINT 1
40 FindBugs("find-bugs", cl::desc("Run many different optimization sequences "
41 "on program to find bugs"),
44 static cl::list<std::string>
45 InputFilenames(cl::Positional, cl::OneOrMore,
46 cl::desc("<input llvm ll/bc files>"));
48 static cl::opt<unsigned> TimeoutValue(
49 "timeout", cl::init(300), cl::value_desc("seconds"),
50 cl::desc("Number of seconds program is allowed to run before it "
51 "is killed (default is 300s), 0 disables timeout"));
53 static cl::opt<int> MemoryLimit(
54 "mlimit", cl::init(-1), cl::value_desc("MBytes"),
55 cl::desc("Maximum amount of memory to use. 0 disables check. Defaults to "
56 "400MB (800MB under valgrind, 0 with sanitizers)."));
59 UseValgrind("enable-valgrind",
60 cl::desc("Run optimizations through valgrind"));
62 // The AnalysesList is automatically populated with registered Passes by the
65 static cl::list<const PassInfo *, bool, PassNameParser>
66 PassList(cl::desc("Passes available:"), cl::ZeroOrMore);
69 StandardLinkOpts("std-link-opts",
70 cl::desc("Include the standard link time optimizations"));
73 OptLevelO1("O1", cl::desc("Optimization level 1. Identical to 'opt -O1'"));
76 OptLevelO2("O2", cl::desc("Optimization level 2. Identical to 'opt -O2'"));
78 static cl::opt<bool> OptLevelOs(
81 "Like -O2 with extra optimizations for size. Similar to clang -Os"));
84 OptLevelO3("O3", cl::desc("Optimization level 3. Identical to 'opt -O3'"));
86 static cl::opt<std::string>
87 OverrideTriple("mtriple", cl::desc("Override target triple for module"));
89 /// BugpointIsInterrupted - Set to true when the user presses ctrl-c.
90 bool llvm::BugpointIsInterrupted = false;
92 #ifndef DEBUG_BUGPOINT
93 static void BugpointInterruptFunction() { BugpointIsInterrupted = true; }
96 // Hack to capture a pass list.
98 class AddToDriver : public legacy::FunctionPassManager {
102 AddToDriver(BugDriver &_D) : FunctionPassManager(nullptr), D(_D) {}
104 void add(Pass *P) override {
105 const void *ID = P->getPassID();
106 const PassInfo *PI = PassRegistry::getPassRegistry()->getPassInfo(ID);
107 D.addPass(PI->getPassArgument());
112 #ifdef LINK_POLLY_INTO_TOOLS
114 void initializePollyPasses(llvm::PassRegistry &Registry);
118 int main(int argc, char **argv) {
119 #ifndef DEBUG_BUGPOINT
120 llvm::sys::PrintStackTraceOnErrorSignal(argv[0]);
121 llvm::PrettyStackTraceProgram X(argc, argv);
122 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
126 PassRegistry &Registry = *PassRegistry::getPassRegistry();
127 initializeCore(Registry);
128 initializeScalarOpts(Registry);
129 initializeObjCARCOpts(Registry);
130 initializeVectorization(Registry);
131 initializeIPO(Registry);
132 initializeAnalysis(Registry);
133 initializeTransformUtils(Registry);
134 initializeInstCombine(Registry);
135 initializeInstrumentation(Registry);
136 initializeTarget(Registry);
138 #ifdef LINK_POLLY_INTO_TOOLS
139 polly::initializePollyPasses(Registry);
142 if (std::getenv("bar") == (char*) -1) {
143 InitializeAllTargets();
144 InitializeAllTargetMCs();
145 InitializeAllAsmPrinters();
146 InitializeAllAsmParsers();
149 cl::ParseCommandLineOptions(argc, argv,
150 "LLVM automatic testcase reducer. See\nhttp://"
151 "llvm.org/cmds/bugpoint.html"
152 " for more information.\n");
153 #ifndef DEBUG_BUGPOINT
154 sys::SetInterruptFunction(BugpointInterruptFunction);
158 // If we have an override, set it and then track the triple we want Modules
160 if (!OverrideTriple.empty()) {
161 TargetTriple.setTriple(Triple::normalize(OverrideTriple));
162 outs() << "Override triple set to '" << TargetTriple.getTriple() << "'\n";
165 if (MemoryLimit < 0) {
166 // Set the default MemoryLimit. Be sure to update the flag's description if
168 if (sys::RunningOnValgrind() || UseValgrind)
172 #if (LLVM_ADDRESS_SANITIZER_BUILD || LLVM_MEMORY_SANITIZER_BUILD || \
173 LLVM_THREAD_SANITIZER_BUILD)
174 // Starting from kernel 4.9 memory allocated with mmap is counted against
175 // RLIMIT_DATA. Sanitizers need to allocate tens of terabytes for shadow.
180 BugDriver D(argv[0], FindBugs, TimeoutValue, MemoryLimit, UseValgrind,
182 if (D.addSources(InputFilenames))
187 if (StandardLinkOpts) {
188 PassManagerBuilder Builder;
189 Builder.Inliner = createFunctionInliningPass();
190 Builder.populateLTOPassManager(PM);
193 if (OptLevelO1 || OptLevelO2 || OptLevelO3) {
194 PassManagerBuilder Builder;
196 Builder.Inliner = createAlwaysInlinerLegacyPass();
197 else if (OptLevelOs || OptLevelO2)
198 Builder.Inliner = createFunctionInliningPass(
199 2, OptLevelOs ? 1 : 0, false);
201 Builder.Inliner = createFunctionInliningPass(275);
202 Builder.populateFunctionPassManager(PM);
203 Builder.populateModulePassManager(PM);
206 for (const PassInfo *PI : PassList)
207 D.addPass(PI->getPassArgument());
209 // Bugpoint has the ability of generating a plethora of core files, so to
210 // avoid filling up the disk, we prevent it
211 #ifndef DEBUG_BUGPOINT
212 sys::Process::PreventCoreFiles();
215 if (Error E = D.run()) {
216 errs() << toString(std::move(E));