1 //===- opt.cpp - The LLVM Modular Optimizer -------------------------------===// 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 // Optimizations may be specified an arbitrary number of times on the command 11 // line, They are run in the order specified. 12 // 13 //===----------------------------------------------------------------------===// 14 15 #include "llvm/LLVMContext.h" 16 #include "llvm/Module.h" 17 #include "llvm/PassManager.h" 18 #include "llvm/CallGraphSCCPass.h" 19 #include "llvm/Bitcode/ReaderWriter.h" 20 #include "llvm/Assembly/PrintModulePass.h" 21 #include "llvm/Analysis/DebugInfo.h" 22 #include "llvm/Analysis/Verifier.h" 23 #include "llvm/Analysis/LoopPass.h" 24 #include "llvm/Analysis/RegionPass.h" 25 #include "llvm/Analysis/CallGraph.h" 26 #include "llvm/Target/TargetData.h" 27 #include "llvm/Target/TargetLibraryInfo.h" 28 #include "llvm/Target/TargetMachine.h" 29 #include "llvm/ADT/StringSet.h" 30 #include "llvm/ADT/Triple.h" 31 #include "llvm/Support/PassNameParser.h" 32 #include "llvm/Support/Signals.h" 33 #include "llvm/Support/Debug.h" 34 #include "llvm/Support/IRReader.h" 35 #include "llvm/Support/ManagedStatic.h" 36 #include "llvm/Support/PluginLoader.h" 37 #include "llvm/Support/PrettyStackTrace.h" 38 #include "llvm/Support/SystemUtils.h" 39 #include "llvm/Support/ToolOutputFile.h" 40 #include "llvm/LinkAllPasses.h" 41 #include "llvm/LinkAllVMCore.h" 42 #include "llvm/Transforms/IPO/PassManagerBuilder.h" 43 #include <memory> 44 #include <algorithm> 45 using namespace llvm; 46 47 // The OptimizationList is automatically populated with registered Passes by the 48 // PassNameParser. 49 // 50 static cl::list<const PassInfo*, bool, PassNameParser> 51 PassList(cl::desc("Optimizations available:")); 52 53 // Other command line options... 54 // 55 static cl::opt<std::string> 56 InputFilename(cl::Positional, cl::desc("<input bitcode file>"), 57 cl::init("-"), cl::value_desc("filename")); 58 59 static cl::opt<std::string> 60 OutputFilename("o", cl::desc("Override output filename"), 61 cl::value_desc("filename")); 62 63 static cl::opt<bool> 64 Force("f", cl::desc("Enable binary output on terminals")); 65 66 static cl::opt<bool> 67 PrintEachXForm("p", cl::desc("Print module after each transformation")); 68 69 static cl::opt<bool> 70 NoOutput("disable-output", 71 cl::desc("Do not write result bitcode file"), cl::Hidden); 72 73 static cl::opt<bool> 74 OutputAssembly("S", cl::desc("Write output as LLVM assembly")); 75 76 static cl::opt<bool> 77 NoVerify("disable-verify", cl::desc("Do not verify result module"), cl::Hidden); 78 79 static cl::opt<bool> 80 VerifyEach("verify-each", cl::desc("Verify after each transform")); 81 82 static cl::opt<bool> 83 StripDebug("strip-debug", 84 cl::desc("Strip debugger symbol info from translation unit")); 85 86 static cl::opt<bool> 87 DisableInline("disable-inlining", cl::desc("Do not run the inliner pass")); 88 89 static cl::opt<bool> 90 DisableOptimizations("disable-opt", 91 cl::desc("Do not run any optimization passes")); 92 93 static cl::opt<bool> 94 DisableInternalize("disable-internalize", 95 cl::desc("Do not mark all symbols as internal")); 96 97 static cl::opt<bool> 98 StandardCompileOpts("std-compile-opts", 99 cl::desc("Include the standard compile time optimizations")); 100 101 static cl::opt<bool> 102 StandardLinkOpts("std-link-opts", 103 cl::desc("Include the standard link time optimizations")); 104 105 static cl::opt<bool> 106 OptLevelO1("O1", 107 cl::desc("Optimization level 1. Similar to llvm-gcc -O1")); 108 109 static cl::opt<bool> 110 OptLevelO2("O2", 111 cl::desc("Optimization level 2. Similar to llvm-gcc -O2")); 112 113 static cl::opt<bool> 114 OptLevelO3("O3", 115 cl::desc("Optimization level 3. Similar to llvm-gcc -O3")); 116 117 static cl::opt<bool> 118 UnitAtATime("funit-at-a-time", 119 cl::desc("Enable IPO. This is same as llvm-gcc's -funit-at-a-time"), 120 cl::init(true)); 121 122 static cl::opt<bool> 123 DisableSimplifyLibCalls("disable-simplify-libcalls", 124 cl::desc("Disable simplify-libcalls")); 125 126 static cl::opt<bool> 127 Quiet("q", cl::desc("Obsolete option"), cl::Hidden); 128 129 static cl::alias 130 QuietA("quiet", cl::desc("Alias for -q"), cl::aliasopt(Quiet)); 131 132 static cl::opt<bool> 133 AnalyzeOnly("analyze", cl::desc("Only perform analysis, no optimization")); 134 135 static cl::opt<bool> 136 PrintBreakpoints("print-breakpoints-for-testing", 137 cl::desc("Print select breakpoints location for testing")); 138 139 static cl::opt<std::string> 140 DefaultDataLayout("default-data-layout", 141 cl::desc("data layout string to use if not specified by module"), 142 cl::value_desc("layout-string"), cl::init("")); 143 144 // ---------- Define Printers for module and function passes ------------ 145 namespace { 146 147 struct CallGraphSCCPassPrinter : public CallGraphSCCPass { 148 static char ID; 149 const PassInfo *PassToPrint; 150 raw_ostream &Out; 151 std::string PassName; 152 153 CallGraphSCCPassPrinter(const PassInfo *PI, raw_ostream &out) : 154 CallGraphSCCPass(ID), PassToPrint(PI), Out(out) { 155 std::string PassToPrintName = PassToPrint->getPassName(); 156 PassName = "CallGraphSCCPass Printer: " + PassToPrintName; 157 } 158 159 virtual bool runOnSCC(CallGraphSCC &SCC) { 160 if (!Quiet) 161 Out << "Printing analysis '" << PassToPrint->getPassName() << "':\n"; 162 163 // Get and print pass... 164 for (CallGraphSCC::iterator I = SCC.begin(), E = SCC.end(); I != E; ++I) { 165 Function *F = (*I)->getFunction(); 166 if (F) 167 getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out, 168 F->getParent()); 169 } 170 return false; 171 } 172 173 virtual const char *getPassName() const { return PassName.c_str(); } 174 175 virtual void getAnalysisUsage(AnalysisUsage &AU) const { 176 AU.addRequiredID(PassToPrint->getTypeInfo()); 177 AU.setPreservesAll(); 178 } 179 }; 180 181 char CallGraphSCCPassPrinter::ID = 0; 182 183 struct ModulePassPrinter : public ModulePass { 184 static char ID; 185 const PassInfo *PassToPrint; 186 raw_ostream &Out; 187 std::string PassName; 188 189 ModulePassPrinter(const PassInfo *PI, raw_ostream &out) 190 : ModulePass(ID), PassToPrint(PI), Out(out) { 191 std::string PassToPrintName = PassToPrint->getPassName(); 192 PassName = "ModulePass Printer: " + PassToPrintName; 193 } 194 195 virtual bool runOnModule(Module &M) { 196 if (!Quiet) 197 Out << "Printing analysis '" << PassToPrint->getPassName() << "':\n"; 198 199 // Get and print pass... 200 getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out, &M); 201 return false; 202 } 203 204 virtual const char *getPassName() const { return PassName.c_str(); } 205 206 virtual void getAnalysisUsage(AnalysisUsage &AU) const { 207 AU.addRequiredID(PassToPrint->getTypeInfo()); 208 AU.setPreservesAll(); 209 } 210 }; 211 212 char ModulePassPrinter::ID = 0; 213 struct FunctionPassPrinter : public FunctionPass { 214 const PassInfo *PassToPrint; 215 raw_ostream &Out; 216 static char ID; 217 std::string PassName; 218 219 FunctionPassPrinter(const PassInfo *PI, raw_ostream &out) 220 : FunctionPass(ID), PassToPrint(PI), Out(out) { 221 std::string PassToPrintName = PassToPrint->getPassName(); 222 PassName = "FunctionPass Printer: " + PassToPrintName; 223 } 224 225 virtual bool runOnFunction(Function &F) { 226 if (!Quiet) 227 Out << "Printing analysis '" << PassToPrint->getPassName() 228 << "' for function '" << F.getName() << "':\n"; 229 230 // Get and print pass... 231 getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out, 232 F.getParent()); 233 return false; 234 } 235 236 virtual const char *getPassName() const { return PassName.c_str(); } 237 238 virtual void getAnalysisUsage(AnalysisUsage &AU) const { 239 AU.addRequiredID(PassToPrint->getTypeInfo()); 240 AU.setPreservesAll(); 241 } 242 }; 243 244 char FunctionPassPrinter::ID = 0; 245 246 struct LoopPassPrinter : public LoopPass { 247 static char ID; 248 const PassInfo *PassToPrint; 249 raw_ostream &Out; 250 std::string PassName; 251 252 LoopPassPrinter(const PassInfo *PI, raw_ostream &out) : 253 LoopPass(ID), PassToPrint(PI), Out(out) { 254 std::string PassToPrintName = PassToPrint->getPassName(); 255 PassName = "LoopPass Printer: " + PassToPrintName; 256 } 257 258 259 virtual bool runOnLoop(Loop *L, LPPassManager &LPM) { 260 if (!Quiet) 261 Out << "Printing analysis '" << PassToPrint->getPassName() << "':\n"; 262 263 // Get and print pass... 264 getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out, 265 L->getHeader()->getParent()->getParent()); 266 return false; 267 } 268 269 virtual const char *getPassName() const { return PassName.c_str(); } 270 271 virtual void getAnalysisUsage(AnalysisUsage &AU) const { 272 AU.addRequiredID(PassToPrint->getTypeInfo()); 273 AU.setPreservesAll(); 274 } 275 }; 276 277 char LoopPassPrinter::ID = 0; 278 279 struct RegionPassPrinter : public RegionPass { 280 static char ID; 281 const PassInfo *PassToPrint; 282 raw_ostream &Out; 283 std::string PassName; 284 285 RegionPassPrinter(const PassInfo *PI, raw_ostream &out) : RegionPass(ID), 286 PassToPrint(PI), Out(out) { 287 std::string PassToPrintName = PassToPrint->getPassName(); 288 PassName = "RegionPass Printer: " + PassToPrintName; 289 } 290 291 virtual bool runOnRegion(Region *R, RGPassManager &RGM) { 292 if (!Quiet) { 293 Out << "Printing analysis '" << PassToPrint->getPassName() << "' for " 294 << "region: '" << R->getNameStr() << "' in function '" 295 << R->getEntry()->getParent()->getNameStr() << "':\n"; 296 } 297 // Get and print pass... 298 getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out, 299 R->getEntry()->getParent()->getParent()); 300 return false; 301 } 302 303 virtual const char *getPassName() const { return PassName.c_str(); } 304 305 virtual void getAnalysisUsage(AnalysisUsage &AU) const { 306 AU.addRequiredID(PassToPrint->getTypeInfo()); 307 AU.setPreservesAll(); 308 } 309 }; 310 311 char RegionPassPrinter::ID = 0; 312 313 struct BasicBlockPassPrinter : public BasicBlockPass { 314 const PassInfo *PassToPrint; 315 raw_ostream &Out; 316 static char ID; 317 std::string PassName; 318 319 BasicBlockPassPrinter(const PassInfo *PI, raw_ostream &out) 320 : BasicBlockPass(ID), PassToPrint(PI), Out(out) { 321 std::string PassToPrintName = PassToPrint->getPassName(); 322 PassName = "BasicBlockPass Printer: " + PassToPrintName; 323 } 324 325 virtual bool runOnBasicBlock(BasicBlock &BB) { 326 if (!Quiet) 327 Out << "Printing Analysis info for BasicBlock '" << BB.getName() 328 << "': Pass " << PassToPrint->getPassName() << ":\n"; 329 330 // Get and print pass... 331 getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out, 332 BB.getParent()->getParent()); 333 return false; 334 } 335 336 virtual const char *getPassName() const { return PassName.c_str(); } 337 338 virtual void getAnalysisUsage(AnalysisUsage &AU) const { 339 AU.addRequiredID(PassToPrint->getTypeInfo()); 340 AU.setPreservesAll(); 341 } 342 }; 343 344 char BasicBlockPassPrinter::ID = 0; 345 346 struct BreakpointPrinter : public ModulePass { 347 raw_ostream &Out; 348 static char ID; 349 350 BreakpointPrinter(raw_ostream &out) 351 : ModulePass(ID), Out(out) { 352 } 353 354 void getContextName(DIDescriptor Context, std::string &N) { 355 if (Context.isNameSpace()) { 356 DINameSpace NS(Context); 357 if (!NS.getName().empty()) { 358 getContextName(NS.getContext(), N); 359 N = N + NS.getName().str() + "::"; 360 } 361 } else if (Context.isType()) { 362 DIType TY(Context); 363 if (!TY.getName().empty()) { 364 getContextName(TY.getContext(), N); 365 N = N + TY.getName().str() + "::"; 366 } 367 } 368 } 369 370 virtual bool runOnModule(Module &M) { 371 StringSet<> Processed; 372 if (NamedMDNode *NMD = M.getNamedMetadata("llvm.dbg.sp")) 373 for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) { 374 std::string Name; 375 DISubprogram SP(NMD->getOperand(i)); 376 if (SP.Verify()) 377 getContextName(SP.getContext(), Name); 378 Name = Name + SP.getDisplayName().str(); 379 if (!Name.empty() && Processed.insert(Name)) { 380 Out << Name << "\n"; 381 } 382 } 383 return false; 384 } 385 386 virtual void getAnalysisUsage(AnalysisUsage &AU) const { 387 AU.setPreservesAll(); 388 } 389 }; 390 391 } // anonymous namespace 392 393 char BreakpointPrinter::ID = 0; 394 395 static inline void addPass(PassManagerBase &PM, Pass *P) { 396 // Add the pass to the pass manager... 397 PM.add(P); 398 399 // If we are verifying all of the intermediate steps, add the verifier... 400 if (VerifyEach) PM.add(createVerifierPass()); 401 } 402 403 /// AddOptimizationPasses - This routine adds optimization passes 404 /// based on selected optimization level, OptLevel. This routine 405 /// duplicates llvm-gcc behaviour. 406 /// 407 /// OptLevel - Optimization Level 408 static void AddOptimizationPasses(PassManagerBase &MPM,FunctionPassManager &FPM, 409 unsigned OptLevel) { 410 PassManagerBuilder Builder; 411 Builder.OptLevel = OptLevel; 412 413 if (DisableInline) { 414 // No inlining pass 415 } else if (OptLevel > 1) { 416 unsigned Threshold = 225; 417 if (OptLevel > 2) 418 Threshold = 275; 419 Builder.Inliner = createFunctionInliningPass(Threshold); 420 } else { 421 Builder.Inliner = createAlwaysInlinerPass(); 422 } 423 Builder.DisableUnitAtATime = !UnitAtATime; 424 Builder.DisableUnrollLoops = OptLevel == 0; 425 Builder.DisableSimplifyLibCalls = DisableSimplifyLibCalls; 426 427 Builder.populateFunctionPassManager(FPM); 428 Builder.populateModulePassManager(MPM); 429 } 430 431 static void AddStandardCompilePasses(PassManagerBase &PM) { 432 PM.add(createVerifierPass()); // Verify that input is correct 433 434 // If the -strip-debug command line option was specified, do it. 435 if (StripDebug) 436 addPass(PM, createStripSymbolsPass(true)); 437 438 if (DisableOptimizations) return; 439 440 // -std-compile-opts adds the same module passes as -O3. 441 PassManagerBuilder Builder; 442 if (!DisableInline) 443 Builder.Inliner = createFunctionInliningPass(); 444 Builder.OptLevel = 3; 445 Builder.DisableSimplifyLibCalls = DisableSimplifyLibCalls; 446 Builder.populateModulePassManager(PM); 447 } 448 449 static void AddStandardLinkPasses(PassManagerBase &PM) { 450 PM.add(createVerifierPass()); // Verify that input is correct 451 452 // If the -strip-debug command line option was specified, do it. 453 if (StripDebug) 454 addPass(PM, createStripSymbolsPass(true)); 455 456 if (DisableOptimizations) return; 457 458 PassManagerBuilder Builder; 459 Builder.populateLTOPassManager(PM, /*Internalize=*/ !DisableInternalize, 460 /*RunInliner=*/ !DisableInline); 461 } 462 463 464 //===----------------------------------------------------------------------===// 465 // main for opt 466 // 467 int main(int argc, char **argv) { 468 sys::PrintStackTraceOnErrorSignal(); 469 llvm::PrettyStackTraceProgram X(argc, argv); 470 471 // Enable debug stream buffering. 472 EnableDebugBuffering = true; 473 474 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit. 475 LLVMContext &Context = getGlobalContext(); 476 477 // Initialize passes 478 PassRegistry &Registry = *PassRegistry::getPassRegistry(); 479 initializeCore(Registry); 480 initializeScalarOpts(Registry); 481 initializeIPO(Registry); 482 initializeAnalysis(Registry); 483 initializeIPA(Registry); 484 initializeTransformUtils(Registry); 485 initializeInstCombine(Registry); 486 initializeInstrumentation(Registry); 487 initializeTarget(Registry); 488 489 cl::ParseCommandLineOptions(argc, argv, 490 "llvm .bc -> .bc modular optimizer and analysis printer\n"); 491 492 if (AnalyzeOnly && NoOutput) { 493 errs() << argv[0] << ": analyze mode conflicts with no-output mode.\n"; 494 return 1; 495 } 496 497 // Allocate a full target machine description only if necessary. 498 // FIXME: The choice of target should be controllable on the command line. 499 std::auto_ptr<TargetMachine> target; 500 501 SMDiagnostic Err; 502 503 // Load the input module... 504 std::auto_ptr<Module> M; 505 M.reset(ParseIRFile(InputFilename, Err, Context)); 506 507 if (M.get() == 0) { 508 Err.Print(argv[0], errs()); 509 return 1; 510 } 511 512 // Figure out what stream we are supposed to write to... 513 OwningPtr<tool_output_file> Out; 514 if (NoOutput) { 515 if (!OutputFilename.empty()) 516 errs() << "WARNING: The -o (output filename) option is ignored when\n" 517 "the --disable-output option is used.\n"; 518 } else { 519 // Default to standard output. 520 if (OutputFilename.empty()) 521 OutputFilename = "-"; 522 523 std::string ErrorInfo; 524 Out.reset(new tool_output_file(OutputFilename.c_str(), ErrorInfo, 525 raw_fd_ostream::F_Binary)); 526 if (!ErrorInfo.empty()) { 527 errs() << ErrorInfo << '\n'; 528 return 1; 529 } 530 } 531 532 // If the output is set to be emitted to standard out, and standard out is a 533 // console, print out a warning message and refuse to do it. We don't 534 // impress anyone by spewing tons of binary goo to a terminal. 535 if (!Force && !NoOutput && !AnalyzeOnly && !OutputAssembly) 536 if (CheckBitcodeOutputToConsole(Out->os(), !Quiet)) 537 NoOutput = true; 538 539 // Create a PassManager to hold and optimize the collection of passes we are 540 // about to build. 541 // 542 PassManager Passes; 543 544 // Add an appropriate TargetLibraryInfo pass for the module's triple. 545 TargetLibraryInfo *TLI = new TargetLibraryInfo(Triple(M->getTargetTriple())); 546 547 // The -disable-simplify-libcalls flag actually disables all builtin optzns. 548 if (DisableSimplifyLibCalls) 549 TLI->disableAllFunctions(); 550 Passes.add(TLI); 551 552 // Add an appropriate TargetData instance for this module. 553 TargetData *TD = 0; 554 const std::string &ModuleDataLayout = M.get()->getDataLayout(); 555 if (!ModuleDataLayout.empty()) 556 TD = new TargetData(ModuleDataLayout); 557 else if (!DefaultDataLayout.empty()) 558 TD = new TargetData(DefaultDataLayout); 559 560 if (TD) 561 Passes.add(TD); 562 563 OwningPtr<FunctionPassManager> FPasses; 564 if (OptLevelO1 || OptLevelO2 || OptLevelO3) { 565 FPasses.reset(new FunctionPassManager(M.get())); 566 if (TD) 567 FPasses->add(new TargetData(*TD)); 568 } 569 570 if (PrintBreakpoints) { 571 // Default to standard output. 572 if (!Out) { 573 if (OutputFilename.empty()) 574 OutputFilename = "-"; 575 576 std::string ErrorInfo; 577 Out.reset(new tool_output_file(OutputFilename.c_str(), ErrorInfo, 578 raw_fd_ostream::F_Binary)); 579 if (!ErrorInfo.empty()) { 580 errs() << ErrorInfo << '\n'; 581 return 1; 582 } 583 } 584 Passes.add(new BreakpointPrinter(Out->os())); 585 NoOutput = true; 586 } 587 588 // If the -strip-debug command line option was specified, add it. If 589 // -std-compile-opts was also specified, it will handle StripDebug. 590 if (StripDebug && !StandardCompileOpts) 591 addPass(Passes, createStripSymbolsPass(true)); 592 593 // Create a new optimization pass for each one specified on the command line 594 for (unsigned i = 0; i < PassList.size(); ++i) { 595 // Check to see if -std-compile-opts was specified before this option. If 596 // so, handle it. 597 if (StandardCompileOpts && 598 StandardCompileOpts.getPosition() < PassList.getPosition(i)) { 599 AddStandardCompilePasses(Passes); 600 StandardCompileOpts = false; 601 } 602 603 if (StandardLinkOpts && 604 StandardLinkOpts.getPosition() < PassList.getPosition(i)) { 605 AddStandardLinkPasses(Passes); 606 StandardLinkOpts = false; 607 } 608 609 if (OptLevelO1 && OptLevelO1.getPosition() < PassList.getPosition(i)) { 610 AddOptimizationPasses(Passes, *FPasses, 1); 611 OptLevelO1 = false; 612 } 613 614 if (OptLevelO2 && OptLevelO2.getPosition() < PassList.getPosition(i)) { 615 AddOptimizationPasses(Passes, *FPasses, 2); 616 OptLevelO2 = false; 617 } 618 619 if (OptLevelO3 && OptLevelO3.getPosition() < PassList.getPosition(i)) { 620 AddOptimizationPasses(Passes, *FPasses, 3); 621 OptLevelO3 = false; 622 } 623 624 const PassInfo *PassInf = PassList[i]; 625 Pass *P = 0; 626 if (PassInf->getNormalCtor()) 627 P = PassInf->getNormalCtor()(); 628 else 629 errs() << argv[0] << ": cannot create pass: " 630 << PassInf->getPassName() << "\n"; 631 if (P) { 632 PassKind Kind = P->getPassKind(); 633 addPass(Passes, P); 634 635 if (AnalyzeOnly) { 636 switch (Kind) { 637 case PT_BasicBlock: 638 Passes.add(new BasicBlockPassPrinter(PassInf, Out->os())); 639 break; 640 case PT_Region: 641 Passes.add(new RegionPassPrinter(PassInf, Out->os())); 642 break; 643 case PT_Loop: 644 Passes.add(new LoopPassPrinter(PassInf, Out->os())); 645 break; 646 case PT_Function: 647 Passes.add(new FunctionPassPrinter(PassInf, Out->os())); 648 break; 649 case PT_CallGraphSCC: 650 Passes.add(new CallGraphSCCPassPrinter(PassInf, Out->os())); 651 break; 652 default: 653 Passes.add(new ModulePassPrinter(PassInf, Out->os())); 654 break; 655 } 656 } 657 } 658 659 if (PrintEachXForm) 660 Passes.add(createPrintModulePass(&errs())); 661 } 662 663 // If -std-compile-opts was specified at the end of the pass list, add them. 664 if (StandardCompileOpts) { 665 AddStandardCompilePasses(Passes); 666 StandardCompileOpts = false; 667 } 668 669 if (StandardLinkOpts) { 670 AddStandardLinkPasses(Passes); 671 StandardLinkOpts = false; 672 } 673 674 if (OptLevelO1) 675 AddOptimizationPasses(Passes, *FPasses, 1); 676 677 if (OptLevelO2) 678 AddOptimizationPasses(Passes, *FPasses, 2); 679 680 if (OptLevelO3) 681 AddOptimizationPasses(Passes, *FPasses, 3); 682 683 if (OptLevelO1 || OptLevelO2 || OptLevelO3) { 684 FPasses->doInitialization(); 685 for (Module::iterator F = M->begin(), E = M->end(); F != E; ++F) 686 FPasses->run(*F); 687 FPasses->doFinalization(); 688 } 689 690 // Check that the module is well formed on completion of optimization 691 if (!NoVerify && !VerifyEach) 692 Passes.add(createVerifierPass()); 693 694 // Write bitcode or assembly to the output as the last step... 695 if (!NoOutput && !AnalyzeOnly) { 696 if (OutputAssembly) 697 Passes.add(createPrintModulePass(&Out->os())); 698 else 699 Passes.add(createBitcodeWriterPass(Out->os())); 700 } 701 702 // Before executing passes, print the final values of the LLVM options. 703 cl::PrintOptionValues(); 704 705 // Now that we have all of the passes ready, run them. 706 Passes.run(*M.get()); 707 708 // Declare success. 709 if (!NoOutput || PrintBreakpoints) 710 Out->keep(); 711 712 return 0; 713 } 714