1 //===- opt.cpp - The LLVM Modular Optimizer -------------------------------===//
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 // Optimizations may be specified an arbitrary number of times on the command
11 // line, They are run in the order specified.
13 //===----------------------------------------------------------------------===//
15 #include "llvm/LLVMContext.h"
16 #include "llvm/DataLayout.h"
17 #include "llvm/DebugInfo.h"
18 #include "llvm/Module.h"
19 #include "llvm/PassManager.h"
20 #include "llvm/CallGraphSCCPass.h"
21 #include "llvm/CodeGen/CommandFlags.h"
22 #include "llvm/Bitcode/ReaderWriter.h"
23 #include "llvm/Assembly/PrintModulePass.h"
24 #include "llvm/Analysis/Verifier.h"
25 #include "llvm/Analysis/LoopPass.h"
26 #include "llvm/Analysis/RegionPass.h"
27 #include "llvm/Analysis/CallGraph.h"
28 #include "llvm/Target/TargetLibraryInfo.h"
29 #include "llvm/Target/TargetMachine.h"
30 #include "llvm/ADT/StringSet.h"
31 #include "llvm/ADT/Triple.h"
32 #include "llvm/Support/PassNameParser.h"
33 #include "llvm/Support/Signals.h"
34 #include "llvm/Support/Debug.h"
35 #include "llvm/Support/IRReader.h"
36 #include "llvm/Support/ManagedStatic.h"
37 #include "llvm/Support/PluginLoader.h"
38 #include "llvm/Support/PrettyStackTrace.h"
39 #include "llvm/Support/SystemUtils.h"
40 #include "llvm/Support/TargetRegistry.h"
41 #include "llvm/Support/ToolOutputFile.h"
42 #include "llvm/Support/TargetSelect.h"
43 #include "llvm/MC/SubtargetFeature.h"
44 #include "llvm/LinkAllPasses.h"
45 #include "llvm/LinkAllVMCore.h"
46 #include "llvm/Transforms/IPO/PassManagerBuilder.h"
51 // The OptimizationList is automatically populated with registered Passes by the
54 static cl::list<const PassInfo*, bool, PassNameParser>
55 PassList(cl::desc("Optimizations available:"));
57 // Other command line options...
59 static cl::opt<std::string>
60 InputFilename(cl::Positional, cl::desc("<input bitcode file>"),
61 cl::init("-"), cl::value_desc("filename"));
63 static cl::opt<std::string>
64 OutputFilename("o", cl::desc("Override output filename"),
65 cl::value_desc("filename"));
68 Force("f", cl::desc("Enable binary output on terminals"));
71 PrintEachXForm("p", cl::desc("Print module after each transformation"));
74 NoOutput("disable-output",
75 cl::desc("Do not write result bitcode file"), cl::Hidden);
78 OutputAssembly("S", cl::desc("Write output as LLVM assembly"));
81 NoVerify("disable-verify", cl::desc("Do not verify result module"), cl::Hidden);
84 VerifyEach("verify-each", cl::desc("Verify after each transform"));
87 StripDebug("strip-debug",
88 cl::desc("Strip debugger symbol info from translation unit"));
91 DisableInline("disable-inlining", cl::desc("Do not run the inliner pass"));
94 DisableOptimizations("disable-opt",
95 cl::desc("Do not run any optimization passes"));
98 DisableInternalize("disable-internalize",
99 cl::desc("Do not mark all symbols as internal"));
102 StandardCompileOpts("std-compile-opts",
103 cl::desc("Include the standard compile time optimizations"));
106 StandardLinkOpts("std-link-opts",
107 cl::desc("Include the standard link time optimizations"));
111 cl::desc("Optimization level 1. Similar to clang -O1"));
115 cl::desc("Optimization level 2. Similar to clang -O2"));
119 cl::desc("Like -O2 with extra optimizations for size. Similar to clang -Os"));
123 cl::desc("Like -Os but reduces code size further. Similar to clang -Oz"));
127 cl::desc("Optimization level 3. Similar to clang -O3"));
129 static cl::opt<std::string>
130 TargetTriple("mtriple", cl::desc("Override target triple for module"));
133 UnitAtATime("funit-at-a-time",
134 cl::desc("Enable IPO. This is same as llvm-gcc's -funit-at-a-time"),
138 DisableSimplifyLibCalls("disable-simplify-libcalls",
139 cl::desc("Disable simplify-libcalls"));
142 Quiet("q", cl::desc("Obsolete option"), cl::Hidden);
145 QuietA("quiet", cl::desc("Alias for -q"), cl::aliasopt(Quiet));
148 AnalyzeOnly("analyze", cl::desc("Only perform analysis, no optimization"));
151 PrintBreakpoints("print-breakpoints-for-testing",
152 cl::desc("Print select breakpoints location for testing"));
154 static cl::opt<std::string>
155 DefaultDataLayout("default-data-layout",
156 cl::desc("data layout string to use if not specified by module"),
157 cl::value_desc("layout-string"), cl::init(""));
159 // ---------- Define Printers for module and function passes ------------
162 struct CallGraphSCCPassPrinter : public CallGraphSCCPass {
164 const PassInfo *PassToPrint;
166 std::string PassName;
168 CallGraphSCCPassPrinter(const PassInfo *PI, raw_ostream &out) :
169 CallGraphSCCPass(ID), PassToPrint(PI), Out(out) {
170 std::string PassToPrintName = PassToPrint->getPassName();
171 PassName = "CallGraphSCCPass Printer: " + PassToPrintName;
174 virtual bool runOnSCC(CallGraphSCC &SCC) {
176 Out << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
178 // Get and print pass...
179 for (CallGraphSCC::iterator I = SCC.begin(), E = SCC.end(); I != E; ++I) {
180 Function *F = (*I)->getFunction();
182 getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out,
188 virtual const char *getPassName() const { return PassName.c_str(); }
190 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
191 AU.addRequiredID(PassToPrint->getTypeInfo());
192 AU.setPreservesAll();
196 char CallGraphSCCPassPrinter::ID = 0;
198 struct ModulePassPrinter : public ModulePass {
200 const PassInfo *PassToPrint;
202 std::string PassName;
204 ModulePassPrinter(const PassInfo *PI, raw_ostream &out)
205 : ModulePass(ID), PassToPrint(PI), Out(out) {
206 std::string PassToPrintName = PassToPrint->getPassName();
207 PassName = "ModulePass Printer: " + PassToPrintName;
210 virtual bool runOnModule(Module &M) {
212 Out << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
214 // Get and print pass...
215 getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out, &M);
219 virtual const char *getPassName() const { return PassName.c_str(); }
221 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
222 AU.addRequiredID(PassToPrint->getTypeInfo());
223 AU.setPreservesAll();
227 char ModulePassPrinter::ID = 0;
228 struct FunctionPassPrinter : public FunctionPass {
229 const PassInfo *PassToPrint;
232 std::string PassName;
234 FunctionPassPrinter(const PassInfo *PI, raw_ostream &out)
235 : FunctionPass(ID), PassToPrint(PI), Out(out) {
236 std::string PassToPrintName = PassToPrint->getPassName();
237 PassName = "FunctionPass Printer: " + PassToPrintName;
240 virtual bool runOnFunction(Function &F) {
242 Out << "Printing analysis '" << PassToPrint->getPassName()
243 << "' for function '" << F.getName() << "':\n";
245 // Get and print pass...
246 getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out,
251 virtual const char *getPassName() const { return PassName.c_str(); }
253 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
254 AU.addRequiredID(PassToPrint->getTypeInfo());
255 AU.setPreservesAll();
259 char FunctionPassPrinter::ID = 0;
261 struct LoopPassPrinter : public LoopPass {
263 const PassInfo *PassToPrint;
265 std::string PassName;
267 LoopPassPrinter(const PassInfo *PI, raw_ostream &out) :
268 LoopPass(ID), PassToPrint(PI), Out(out) {
269 std::string PassToPrintName = PassToPrint->getPassName();
270 PassName = "LoopPass Printer: " + PassToPrintName;
274 virtual bool runOnLoop(Loop *L, LPPassManager &LPM) {
276 Out << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
278 // Get and print pass...
279 getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out,
280 L->getHeader()->getParent()->getParent());
284 virtual const char *getPassName() const { return PassName.c_str(); }
286 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
287 AU.addRequiredID(PassToPrint->getTypeInfo());
288 AU.setPreservesAll();
292 char LoopPassPrinter::ID = 0;
294 struct RegionPassPrinter : public RegionPass {
296 const PassInfo *PassToPrint;
298 std::string PassName;
300 RegionPassPrinter(const PassInfo *PI, raw_ostream &out) : RegionPass(ID),
301 PassToPrint(PI), Out(out) {
302 std::string PassToPrintName = PassToPrint->getPassName();
303 PassName = "RegionPass Printer: " + PassToPrintName;
306 virtual bool runOnRegion(Region *R, RGPassManager &RGM) {
308 Out << "Printing analysis '" << PassToPrint->getPassName() << "' for "
309 << "region: '" << R->getNameStr() << "' in function '"
310 << R->getEntry()->getParent()->getName() << "':\n";
312 // Get and print pass...
313 getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out,
314 R->getEntry()->getParent()->getParent());
318 virtual const char *getPassName() const { return PassName.c_str(); }
320 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
321 AU.addRequiredID(PassToPrint->getTypeInfo());
322 AU.setPreservesAll();
326 char RegionPassPrinter::ID = 0;
328 struct BasicBlockPassPrinter : public BasicBlockPass {
329 const PassInfo *PassToPrint;
332 std::string PassName;
334 BasicBlockPassPrinter(const PassInfo *PI, raw_ostream &out)
335 : BasicBlockPass(ID), PassToPrint(PI), Out(out) {
336 std::string PassToPrintName = PassToPrint->getPassName();
337 PassName = "BasicBlockPass Printer: " + PassToPrintName;
340 virtual bool runOnBasicBlock(BasicBlock &BB) {
342 Out << "Printing Analysis info for BasicBlock '" << BB.getName()
343 << "': Pass " << PassToPrint->getPassName() << ":\n";
345 // Get and print pass...
346 getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out,
347 BB.getParent()->getParent());
351 virtual const char *getPassName() const { return PassName.c_str(); }
353 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
354 AU.addRequiredID(PassToPrint->getTypeInfo());
355 AU.setPreservesAll();
359 char BasicBlockPassPrinter::ID = 0;
361 struct BreakpointPrinter : public ModulePass {
365 BreakpointPrinter(raw_ostream &out)
366 : ModulePass(ID), Out(out) {
369 void getContextName(DIDescriptor Context, std::string &N) {
370 if (Context.isNameSpace()) {
371 DINameSpace NS(Context);
372 if (!NS.getName().empty()) {
373 getContextName(NS.getContext(), N);
374 N = N + NS.getName().str() + "::";
376 } else if (Context.isType()) {
378 if (!TY.getName().empty()) {
379 getContextName(TY.getContext(), N);
380 N = N + TY.getName().str() + "::";
385 virtual bool runOnModule(Module &M) {
386 StringSet<> Processed;
387 if (NamedMDNode *NMD = M.getNamedMetadata("llvm.dbg.sp"))
388 for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
390 DISubprogram SP(NMD->getOperand(i));
392 getContextName(SP.getContext(), Name);
393 Name = Name + SP.getDisplayName().str();
394 if (!Name.empty() && Processed.insert(Name)) {
401 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
402 AU.setPreservesAll();
406 } // anonymous namespace
408 char BreakpointPrinter::ID = 0;
410 static inline void addPass(PassManagerBase &PM, Pass *P) {
411 // Add the pass to the pass manager...
414 // If we are verifying all of the intermediate steps, add the verifier...
415 if (VerifyEach) PM.add(createVerifierPass());
418 /// AddOptimizationPasses - This routine adds optimization passes
419 /// based on selected optimization level, OptLevel. This routine
420 /// duplicates llvm-gcc behaviour.
422 /// OptLevel - Optimization Level
423 static void AddOptimizationPasses(PassManagerBase &MPM,FunctionPassManager &FPM,
424 unsigned OptLevel, unsigned SizeLevel) {
425 FPM.add(createVerifierPass()); // Verify that input is correct
427 PassManagerBuilder Builder;
428 Builder.OptLevel = OptLevel;
429 Builder.SizeLevel = SizeLevel;
433 } else if (OptLevel > 1) {
434 unsigned Threshold = 225;
435 if (SizeLevel == 1) // -Os
437 else if (SizeLevel == 2) // -Oz
441 Builder.Inliner = createFunctionInliningPass(Threshold);
443 Builder.Inliner = createAlwaysInlinerPass();
445 Builder.DisableUnitAtATime = !UnitAtATime;
446 Builder.DisableUnrollLoops = OptLevel == 0;
447 Builder.DisableSimplifyLibCalls = DisableSimplifyLibCalls;
449 Builder.populateFunctionPassManager(FPM);
450 Builder.populateModulePassManager(MPM);
453 static void AddStandardCompilePasses(PassManagerBase &PM) {
454 PM.add(createVerifierPass()); // Verify that input is correct
456 // If the -strip-debug command line option was specified, do it.
458 addPass(PM, createStripSymbolsPass(true));
460 if (DisableOptimizations) return;
462 // -std-compile-opts adds the same module passes as -O3.
463 PassManagerBuilder Builder;
465 Builder.Inliner = createFunctionInliningPass();
466 Builder.OptLevel = 3;
467 Builder.DisableSimplifyLibCalls = DisableSimplifyLibCalls;
468 Builder.populateModulePassManager(PM);
471 static void AddStandardLinkPasses(PassManagerBase &PM) {
472 PM.add(createVerifierPass()); // Verify that input is correct
474 // If the -strip-debug command line option was specified, do it.
476 addPass(PM, createStripSymbolsPass(true));
478 if (DisableOptimizations) return;
480 PassManagerBuilder Builder;
481 Builder.populateLTOPassManager(PM, /*Internalize=*/ !DisableInternalize,
482 /*RunInliner=*/ !DisableInline);
485 //===----------------------------------------------------------------------===//
486 // CodeGen-related helper functions.
488 static TargetOptions GetTargetOptions() {
489 TargetOptions Options;
490 Options.LessPreciseFPMADOption = EnableFPMAD;
491 Options.NoFramePointerElim = DisableFPElim;
492 Options.NoFramePointerElimNonLeaf = DisableFPElimNonLeaf;
493 Options.AllowFPOpFusion = FuseFPOps;
494 Options.UnsafeFPMath = EnableUnsafeFPMath;
495 Options.NoInfsFPMath = EnableNoInfsFPMath;
496 Options.NoNaNsFPMath = EnableNoNaNsFPMath;
497 Options.HonorSignDependentRoundingFPMathOption =
498 EnableHonorSignDependentRoundingFPMath;
499 Options.UseSoftFloat = GenerateSoftFloatCalls;
500 if (FloatABIForCalls != FloatABI::Default)
501 Options.FloatABIType = FloatABIForCalls;
502 Options.NoZerosInBSS = DontPlaceZerosInBSS;
503 Options.GuaranteedTailCallOpt = EnableGuaranteedTailCallOpt;
504 Options.DisableTailCalls = DisableTailCalls;
505 Options.StackAlignmentOverride = OverrideStackAlignment;
506 Options.RealignStack = EnableRealignStack;
507 Options.TrapFuncName = TrapFuncName;
508 Options.PositionIndependentExecutable = EnablePIE;
509 Options.EnableSegmentedStacks = SegmentedStacks;
510 Options.UseInitArray = UseInitArray;
511 Options.SSPBufferSize = SSPBufferSize;
515 CodeGenOpt::Level GetCodeGenOptLevel() {
517 return CodeGenOpt::Less;
519 return CodeGenOpt::Default;
521 return CodeGenOpt::Aggressive;
522 return CodeGenOpt::None;
525 // Returns the TargetMachine instance or zero if no triple is provided.
526 static TargetMachine* GetTargetMachine(std::string TripleStr) {
527 if (TripleStr.empty())
530 // Get the target specific parser.
532 Triple TheTriple(Triple::normalize(TargetTriple));
534 const Target *TheTarget = TargetRegistry::lookupTarget(MArch, TheTriple,
540 // Package up features to be passed to target/subtarget
541 std::string FeaturesStr;
543 SubtargetFeatures Features;
544 for (unsigned i = 0; i != MAttrs.size(); ++i)
545 Features.AddFeature(MAttrs[i]);
546 FeaturesStr = Features.getString();
549 return TheTarget->createTargetMachine(TheTriple.getTriple(),
550 MCPU, FeaturesStr, GetTargetOptions(),
552 GetCodeGenOptLevel());
555 //===----------------------------------------------------------------------===//
558 int main(int argc, char **argv) {
559 sys::PrintStackTraceOnErrorSignal();
560 llvm::PrettyStackTraceProgram X(argc, argv);
562 // Enable debug stream buffering.
563 EnableDebugBuffering = true;
565 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
566 LLVMContext &Context = getGlobalContext();
568 InitializeAllTargets();
569 InitializeAllTargetMCs();
572 PassRegistry &Registry = *PassRegistry::getPassRegistry();
573 initializeCore(Registry);
574 initializeScalarOpts(Registry);
575 initializeVectorization(Registry);
576 initializeIPO(Registry);
577 initializeAnalysis(Registry);
578 initializeIPA(Registry);
579 initializeTransformUtils(Registry);
580 initializeInstCombine(Registry);
581 initializeInstrumentation(Registry);
582 initializeTarget(Registry);
584 cl::ParseCommandLineOptions(argc, argv,
585 "llvm .bc -> .bc modular optimizer and analysis printer\n");
587 if (AnalyzeOnly && NoOutput) {
588 errs() << argv[0] << ": analyze mode conflicts with no-output mode.\n";
594 // Load the input module...
595 std::auto_ptr<Module> M;
596 M.reset(ParseIRFile(InputFilename, Err, Context));
599 Err.print(argv[0], errs());
603 // If we are supposed to override the target triple, do so now.
604 if (!TargetTriple.empty())
605 M->setTargetTriple(Triple::normalize(TargetTriple));
607 // Figure out what stream we are supposed to write to...
608 OwningPtr<tool_output_file> Out;
610 if (!OutputFilename.empty())
611 errs() << "WARNING: The -o (output filename) option is ignored when\n"
612 "the --disable-output option is used.\n";
614 // Default to standard output.
615 if (OutputFilename.empty())
616 OutputFilename = "-";
618 std::string ErrorInfo;
619 Out.reset(new tool_output_file(OutputFilename.c_str(), ErrorInfo,
620 raw_fd_ostream::F_Binary));
621 if (!ErrorInfo.empty()) {
622 errs() << ErrorInfo << '\n';
627 // If the output is set to be emitted to standard out, and standard out is a
628 // console, print out a warning message and refuse to do it. We don't
629 // impress anyone by spewing tons of binary goo to a terminal.
630 if (!Force && !NoOutput && !AnalyzeOnly && !OutputAssembly)
631 if (CheckBitcodeOutputToConsole(Out->os(), !Quiet))
634 // Create a PassManager to hold and optimize the collection of passes we are
639 // Add an appropriate TargetLibraryInfo pass for the module's triple.
640 TargetLibraryInfo *TLI = new TargetLibraryInfo(Triple(M->getTargetTriple()));
642 // The -disable-simplify-libcalls flag actually disables all builtin optzns.
643 if (DisableSimplifyLibCalls)
644 TLI->disableAllFunctions();
647 // Add an appropriate DataLayout instance for this module.
649 const std::string &ModuleDataLayout = M.get()->getDataLayout();
650 if (!ModuleDataLayout.empty())
651 TD = new DataLayout(ModuleDataLayout);
652 else if (!DefaultDataLayout.empty())
653 TD = new DataLayout(DefaultDataLayout);
658 std::auto_ptr<TargetMachine> TM(GetTargetMachine(TargetTriple));
660 Passes.add(new TargetTransformInfo(TM->getScalarTargetTransformInfo(),
661 TM->getVectorTargetTransformInfo()));
664 OwningPtr<FunctionPassManager> FPasses;
665 if (OptLevelO1 || OptLevelO2 || OptLevelOs || OptLevelOz || OptLevelO3) {
666 FPasses.reset(new FunctionPassManager(M.get()));
668 FPasses->add(new DataLayout(*TD));
671 if (PrintBreakpoints) {
672 // Default to standard output.
674 if (OutputFilename.empty())
675 OutputFilename = "-";
677 std::string ErrorInfo;
678 Out.reset(new tool_output_file(OutputFilename.c_str(), ErrorInfo,
679 raw_fd_ostream::F_Binary));
680 if (!ErrorInfo.empty()) {
681 errs() << ErrorInfo << '\n';
685 Passes.add(new BreakpointPrinter(Out->os()));
689 // If the -strip-debug command line option was specified, add it. If
690 // -std-compile-opts was also specified, it will handle StripDebug.
691 if (StripDebug && !StandardCompileOpts)
692 addPass(Passes, createStripSymbolsPass(true));
694 // Create a new optimization pass for each one specified on the command line
695 for (unsigned i = 0; i < PassList.size(); ++i) {
696 // Check to see if -std-compile-opts was specified before this option. If
698 if (StandardCompileOpts &&
699 StandardCompileOpts.getPosition() < PassList.getPosition(i)) {
700 AddStandardCompilePasses(Passes);
701 StandardCompileOpts = false;
704 if (StandardLinkOpts &&
705 StandardLinkOpts.getPosition() < PassList.getPosition(i)) {
706 AddStandardLinkPasses(Passes);
707 StandardLinkOpts = false;
710 if (OptLevelO1 && OptLevelO1.getPosition() < PassList.getPosition(i)) {
711 AddOptimizationPasses(Passes, *FPasses, 1, 0);
715 if (OptLevelO2 && OptLevelO2.getPosition() < PassList.getPosition(i)) {
716 AddOptimizationPasses(Passes, *FPasses, 2, 0);
720 if (OptLevelOs && OptLevelOs.getPosition() < PassList.getPosition(i)) {
721 AddOptimizationPasses(Passes, *FPasses, 2, 1);
725 if (OptLevelOz && OptLevelOz.getPosition() < PassList.getPosition(i)) {
726 AddOptimizationPasses(Passes, *FPasses, 2, 2);
730 if (OptLevelO3 && OptLevelO3.getPosition() < PassList.getPosition(i)) {
731 AddOptimizationPasses(Passes, *FPasses, 3, 0);
735 const PassInfo *PassInf = PassList[i];
737 if (PassInf->getNormalCtor())
738 P = PassInf->getNormalCtor()();
740 errs() << argv[0] << ": cannot create pass: "
741 << PassInf->getPassName() << "\n";
743 PassKind Kind = P->getPassKind();
749 Passes.add(new BasicBlockPassPrinter(PassInf, Out->os()));
752 Passes.add(new RegionPassPrinter(PassInf, Out->os()));
755 Passes.add(new LoopPassPrinter(PassInf, Out->os()));
758 Passes.add(new FunctionPassPrinter(PassInf, Out->os()));
760 case PT_CallGraphSCC:
761 Passes.add(new CallGraphSCCPassPrinter(PassInf, Out->os()));
764 Passes.add(new ModulePassPrinter(PassInf, Out->os()));
771 Passes.add(createPrintModulePass(&errs()));
774 // If -std-compile-opts was specified at the end of the pass list, add them.
775 if (StandardCompileOpts) {
776 AddStandardCompilePasses(Passes);
777 StandardCompileOpts = false;
780 if (StandardLinkOpts) {
781 AddStandardLinkPasses(Passes);
782 StandardLinkOpts = false;
786 AddOptimizationPasses(Passes, *FPasses, 1, 0);
789 AddOptimizationPasses(Passes, *FPasses, 2, 0);
792 AddOptimizationPasses(Passes, *FPasses, 2, 1);
795 AddOptimizationPasses(Passes, *FPasses, 2, 2);
798 AddOptimizationPasses(Passes, *FPasses, 3, 0);
800 if (OptLevelO1 || OptLevelO2 || OptLevelOs || OptLevelOz || OptLevelO3) {
801 FPasses->doInitialization();
802 for (Module::iterator F = M->begin(), E = M->end(); F != E; ++F)
804 FPasses->doFinalization();
807 // Check that the module is well formed on completion of optimization
808 if (!NoVerify && !VerifyEach)
809 Passes.add(createVerifierPass());
811 // Write bitcode or assembly to the output as the last step...
812 if (!NoOutput && !AnalyzeOnly) {
814 Passes.add(createPrintModulePass(&Out->os()));
816 Passes.add(createBitcodeWriterPass(Out->os()));
819 // Before executing passes, print the final values of the LLVM options.
820 cl::PrintOptionValues();
822 // Now that we have all of the passes ready, run them.
823 Passes.doInitialization();
824 Passes.run(*M.get());
825 Passes.doFinalization();
828 if (!NoOutput || PrintBreakpoints)