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/IR/LLVMContext.h"
16 #include "llvm/ADT/StringSet.h"
17 #include "llvm/ADT/Triple.h"
18 #include "llvm/Analysis/CallGraph.h"
19 #include "llvm/Analysis/CallGraphSCCPass.h"
20 #include "llvm/Analysis/LoopPass.h"
21 #include "llvm/Analysis/RegionPass.h"
22 #include "llvm/Analysis/Verifier.h"
23 #include "llvm/Assembly/PrintModulePass.h"
24 #include "llvm/Bitcode/ReaderWriter.h"
25 #include "llvm/CodeGen/CommandFlags.h"
26 #include "llvm/DebugInfo.h"
27 #include "llvm/IR/DataLayout.h"
28 #include "llvm/IR/Module.h"
29 #include "llvm/IRReader/IRReader.h"
30 #include "llvm/LinkAllIR.h"
31 #include "llvm/LinkAllPasses.h"
32 #include "llvm/MC/SubtargetFeature.h"
33 #include "llvm/PassManager.h"
34 #include "llvm/Support/Debug.h"
35 #include "llvm/Support/ManagedStatic.h"
36 #include "llvm/Support/PassNameParser.h"
37 #include "llvm/Support/PluginLoader.h"
38 #include "llvm/Support/PrettyStackTrace.h"
39 #include "llvm/Support/Signals.h"
40 #include "llvm/Support/SourceMgr.h"
41 #include "llvm/Support/SystemUtils.h"
42 #include "llvm/Support/TargetRegistry.h"
43 #include "llvm/Support/TargetSelect.h"
44 #include "llvm/Support/ToolOutputFile.h"
45 #include "llvm/Target/TargetLibraryInfo.h"
46 #include "llvm/Target/TargetMachine.h"
47 #include "llvm/Transforms/IPO/PassManagerBuilder.h"
52 // The OptimizationList is automatically populated with registered Passes by the
55 static cl::list<const PassInfo*, bool, PassNameParser>
56 PassList(cl::desc("Optimizations available:"));
58 // Other command line options...
60 static cl::opt<std::string>
61 InputFilename(cl::Positional, cl::desc("<input bitcode file>"),
62 cl::init("-"), cl::value_desc("filename"));
64 static cl::opt<std::string>
65 OutputFilename("o", cl::desc("Override output filename"),
66 cl::value_desc("filename"));
69 Force("f", cl::desc("Enable binary output on terminals"));
72 PrintEachXForm("p", cl::desc("Print module after each transformation"));
75 NoOutput("disable-output",
76 cl::desc("Do not write result bitcode file"), cl::Hidden);
79 OutputAssembly("S", cl::desc("Write output as LLVM assembly"));
82 NoVerify("disable-verify", cl::desc("Do not verify result module"), cl::Hidden);
85 VerifyEach("verify-each", cl::desc("Verify after each transform"));
88 StripDebug("strip-debug",
89 cl::desc("Strip debugger symbol info from translation unit"));
92 DisableInline("disable-inlining", cl::desc("Do not run the inliner pass"));
95 DisableOptimizations("disable-opt",
96 cl::desc("Do not run any optimization passes"));
99 DisableInternalize("disable-internalize",
100 cl::desc("Do not mark all symbols as internal"));
103 StandardCompileOpts("std-compile-opts",
104 cl::desc("Include the standard compile time optimizations"));
107 StandardLinkOpts("std-link-opts",
108 cl::desc("Include the standard link time optimizations"));
112 cl::desc("Optimization level 1. Similar to clang -O1"));
116 cl::desc("Optimization level 2. Similar to clang -O2"));
120 cl::desc("Like -O2 with extra optimizations for size. Similar to clang -Os"));
124 cl::desc("Like -Os but reduces code size further. Similar to clang -Oz"));
128 cl::desc("Optimization level 3. Similar to clang -O3"));
130 static cl::opt<std::string>
131 TargetTriple("mtriple", cl::desc("Override target triple for module"));
134 UnitAtATime("funit-at-a-time",
135 cl::desc("Enable IPO. This is same as llvm-gcc's -funit-at-a-time"),
139 DisableSimplifyLibCalls("disable-simplify-libcalls",
140 cl::desc("Disable simplify-libcalls"));
143 Quiet("q", cl::desc("Obsolete option"), cl::Hidden);
146 QuietA("quiet", cl::desc("Alias for -q"), cl::aliasopt(Quiet));
149 AnalyzeOnly("analyze", cl::desc("Only perform analysis, no optimization"));
152 PrintBreakpoints("print-breakpoints-for-testing",
153 cl::desc("Print select breakpoints location for testing"));
155 static cl::opt<std::string>
156 DefaultDataLayout("default-data-layout",
157 cl::desc("data layout string to use if not specified by module"),
158 cl::value_desc("layout-string"), cl::init(""));
160 // ---------- Define Printers for module and function passes ------------
163 struct CallGraphSCCPassPrinter : public CallGraphSCCPass {
165 const PassInfo *PassToPrint;
167 std::string PassName;
169 CallGraphSCCPassPrinter(const PassInfo *PI, raw_ostream &out) :
170 CallGraphSCCPass(ID), PassToPrint(PI), Out(out) {
171 std::string PassToPrintName = PassToPrint->getPassName();
172 PassName = "CallGraphSCCPass Printer: " + PassToPrintName;
175 virtual bool runOnSCC(CallGraphSCC &SCC) {
177 Out << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
179 // Get and print pass...
180 for (CallGraphSCC::iterator I = SCC.begin(), E = SCC.end(); I != E; ++I) {
181 Function *F = (*I)->getFunction();
183 getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out,
189 virtual const char *getPassName() const { return PassName.c_str(); }
191 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
192 AU.addRequiredID(PassToPrint->getTypeInfo());
193 AU.setPreservesAll();
197 char CallGraphSCCPassPrinter::ID = 0;
199 struct ModulePassPrinter : public ModulePass {
201 const PassInfo *PassToPrint;
203 std::string PassName;
205 ModulePassPrinter(const PassInfo *PI, raw_ostream &out)
206 : ModulePass(ID), PassToPrint(PI), Out(out) {
207 std::string PassToPrintName = PassToPrint->getPassName();
208 PassName = "ModulePass Printer: " + PassToPrintName;
211 virtual bool runOnModule(Module &M) {
213 Out << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
215 // Get and print pass...
216 getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out, &M);
220 virtual const char *getPassName() const { return PassName.c_str(); }
222 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
223 AU.addRequiredID(PassToPrint->getTypeInfo());
224 AU.setPreservesAll();
228 char ModulePassPrinter::ID = 0;
229 struct FunctionPassPrinter : public FunctionPass {
230 const PassInfo *PassToPrint;
233 std::string PassName;
235 FunctionPassPrinter(const PassInfo *PI, raw_ostream &out)
236 : FunctionPass(ID), PassToPrint(PI), Out(out) {
237 std::string PassToPrintName = PassToPrint->getPassName();
238 PassName = "FunctionPass Printer: " + PassToPrintName;
241 virtual bool runOnFunction(Function &F) {
243 Out << "Printing analysis '" << PassToPrint->getPassName()
244 << "' for function '" << F.getName() << "':\n";
246 // Get and print pass...
247 getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out,
252 virtual const char *getPassName() const { return PassName.c_str(); }
254 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
255 AU.addRequiredID(PassToPrint->getTypeInfo());
256 AU.setPreservesAll();
260 char FunctionPassPrinter::ID = 0;
262 struct LoopPassPrinter : public LoopPass {
264 const PassInfo *PassToPrint;
266 std::string PassName;
268 LoopPassPrinter(const PassInfo *PI, raw_ostream &out) :
269 LoopPass(ID), PassToPrint(PI), Out(out) {
270 std::string PassToPrintName = PassToPrint->getPassName();
271 PassName = "LoopPass Printer: " + PassToPrintName;
275 virtual bool runOnLoop(Loop *L, LPPassManager &LPM) {
277 Out << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
279 // Get and print pass...
280 getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out,
281 L->getHeader()->getParent()->getParent());
285 virtual const char *getPassName() const { return PassName.c_str(); }
287 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
288 AU.addRequiredID(PassToPrint->getTypeInfo());
289 AU.setPreservesAll();
293 char LoopPassPrinter::ID = 0;
295 struct RegionPassPrinter : public RegionPass {
297 const PassInfo *PassToPrint;
299 std::string PassName;
301 RegionPassPrinter(const PassInfo *PI, raw_ostream &out) : RegionPass(ID),
302 PassToPrint(PI), Out(out) {
303 std::string PassToPrintName = PassToPrint->getPassName();
304 PassName = "RegionPass Printer: " + PassToPrintName;
307 virtual bool runOnRegion(Region *R, RGPassManager &RGM) {
309 Out << "Printing analysis '" << PassToPrint->getPassName() << "' for "
310 << "region: '" << R->getNameStr() << "' in function '"
311 << R->getEntry()->getParent()->getName() << "':\n";
313 // Get and print pass...
314 getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out,
315 R->getEntry()->getParent()->getParent());
319 virtual const char *getPassName() const { return PassName.c_str(); }
321 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
322 AU.addRequiredID(PassToPrint->getTypeInfo());
323 AU.setPreservesAll();
327 char RegionPassPrinter::ID = 0;
329 struct BasicBlockPassPrinter : public BasicBlockPass {
330 const PassInfo *PassToPrint;
333 std::string PassName;
335 BasicBlockPassPrinter(const PassInfo *PI, raw_ostream &out)
336 : BasicBlockPass(ID), PassToPrint(PI), Out(out) {
337 std::string PassToPrintName = PassToPrint->getPassName();
338 PassName = "BasicBlockPass Printer: " + PassToPrintName;
341 virtual bool runOnBasicBlock(BasicBlock &BB) {
343 Out << "Printing Analysis info for BasicBlock '" << BB.getName()
344 << "': Pass " << PassToPrint->getPassName() << ":\n";
346 // Get and print pass...
347 getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out,
348 BB.getParent()->getParent());
352 virtual const char *getPassName() const { return PassName.c_str(); }
354 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
355 AU.addRequiredID(PassToPrint->getTypeInfo());
356 AU.setPreservesAll();
360 char BasicBlockPassPrinter::ID = 0;
362 struct BreakpointPrinter : public ModulePass {
366 BreakpointPrinter(raw_ostream &out)
367 : ModulePass(ID), Out(out) {
370 void getContextName(DIDescriptor Context, std::string &N) {
371 if (Context.isNameSpace()) {
372 DINameSpace NS(Context);
373 if (!NS.getName().empty()) {
374 getContextName(NS.getContext(), N);
375 N = N + NS.getName().str() + "::";
377 } else if (Context.isType()) {
379 if (!TY.getName().empty()) {
380 getContextName(TY.getContext(), N);
381 N = N + TY.getName().str() + "::";
386 virtual bool runOnModule(Module &M) {
387 StringSet<> Processed;
388 if (NamedMDNode *NMD = M.getNamedMetadata("llvm.dbg.sp"))
389 for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
391 DISubprogram SP(NMD->getOperand(i));
393 getContextName(SP.getContext(), Name);
394 Name = Name + SP.getDisplayName().str();
395 if (!Name.empty() && Processed.insert(Name)) {
402 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
403 AU.setPreservesAll();
407 } // anonymous namespace
409 char BreakpointPrinter::ID = 0;
411 static inline void addPass(PassManagerBase &PM, Pass *P) {
412 // Add the pass to the pass manager...
415 // If we are verifying all of the intermediate steps, add the verifier...
416 if (VerifyEach) PM.add(createVerifierPass());
419 /// AddOptimizationPasses - This routine adds optimization passes
420 /// based on selected optimization level, OptLevel. This routine
421 /// duplicates llvm-gcc behaviour.
423 /// OptLevel - Optimization Level
424 static void AddOptimizationPasses(PassManagerBase &MPM,FunctionPassManager &FPM,
425 unsigned OptLevel, unsigned SizeLevel) {
426 FPM.add(createVerifierPass()); // Verify that input is correct
428 PassManagerBuilder Builder;
429 Builder.OptLevel = OptLevel;
430 Builder.SizeLevel = SizeLevel;
434 } else if (OptLevel > 1) {
435 unsigned Threshold = 225;
436 if (SizeLevel == 1) // -Os
438 else if (SizeLevel == 2) // -Oz
442 Builder.Inliner = createFunctionInliningPass(Threshold);
444 Builder.Inliner = createAlwaysInlinerPass();
446 Builder.DisableUnitAtATime = !UnitAtATime;
447 Builder.DisableUnrollLoops = OptLevel == 0;
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.populateModulePassManager(PM);
470 static void AddStandardLinkPasses(PassManagerBase &PM) {
471 PM.add(createVerifierPass()); // Verify that input is correct
473 // If the -strip-debug command line option was specified, do it.
475 addPass(PM, createStripSymbolsPass(true));
477 if (DisableOptimizations) return;
479 PassManagerBuilder Builder;
480 Builder.populateLTOPassManager(PM, /*Internalize=*/ !DisableInternalize,
481 /*RunInliner=*/ !DisableInline);
484 //===----------------------------------------------------------------------===//
485 // CodeGen-related helper functions.
487 static TargetOptions GetTargetOptions() {
488 TargetOptions Options;
489 Options.LessPreciseFPMADOption = EnableFPMAD;
490 Options.NoFramePointerElim = DisableFPElim;
491 Options.NoFramePointerElimNonLeaf = DisableFPElimNonLeaf;
492 Options.AllowFPOpFusion = FuseFPOps;
493 Options.UnsafeFPMath = EnableUnsafeFPMath;
494 Options.NoInfsFPMath = EnableNoInfsFPMath;
495 Options.NoNaNsFPMath = EnableNoNaNsFPMath;
496 Options.HonorSignDependentRoundingFPMathOption =
497 EnableHonorSignDependentRoundingFPMath;
498 Options.UseSoftFloat = GenerateSoftFloatCalls;
499 if (FloatABIForCalls != FloatABI::Default)
500 Options.FloatABIType = FloatABIForCalls;
501 Options.NoZerosInBSS = DontPlaceZerosInBSS;
502 Options.GuaranteedTailCallOpt = EnableGuaranteedTailCallOpt;
503 Options.DisableTailCalls = DisableTailCalls;
504 Options.StackAlignmentOverride = OverrideStackAlignment;
505 Options.RealignStack = EnableRealignStack;
506 Options.TrapFuncName = TrapFuncName;
507 Options.PositionIndependentExecutable = EnablePIE;
508 Options.EnableSegmentedStacks = SegmentedStacks;
509 Options.UseInitArray = UseInitArray;
510 Options.SSPBufferSize = SSPBufferSize;
514 CodeGenOpt::Level GetCodeGenOptLevel() {
516 return CodeGenOpt::Less;
518 return CodeGenOpt::Default;
520 return CodeGenOpt::Aggressive;
521 return CodeGenOpt::None;
524 // Returns the TargetMachine instance or zero if no triple is provided.
525 static TargetMachine* GetTargetMachine(Triple TheTriple) {
527 const Target *TheTarget = TargetRegistry::lookupTarget(MArch, TheTriple,
529 // Some modules don't specify a triple, and this is okay.
534 // Package up features to be passed to target/subtarget
535 std::string FeaturesStr;
537 SubtargetFeatures Features;
538 for (unsigned i = 0; i != MAttrs.size(); ++i)
539 Features.AddFeature(MAttrs[i]);
540 FeaturesStr = Features.getString();
543 return TheTarget->createTargetMachine(TheTriple.getTriple(),
544 MCPU, FeaturesStr, GetTargetOptions(),
546 GetCodeGenOptLevel());
549 //===----------------------------------------------------------------------===//
552 int main(int argc, char **argv) {
553 sys::PrintStackTraceOnErrorSignal();
554 llvm::PrettyStackTraceProgram X(argc, argv);
556 // Enable debug stream buffering.
557 EnableDebugBuffering = true;
559 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
560 LLVMContext &Context = getGlobalContext();
562 InitializeAllTargets();
563 InitializeAllTargetMCs();
566 PassRegistry &Registry = *PassRegistry::getPassRegistry();
567 initializeCore(Registry);
568 initializeDebugIRPass(Registry);
569 initializeScalarOpts(Registry);
570 initializeObjCARCOpts(Registry);
571 initializeVectorization(Registry);
572 initializeIPO(Registry);
573 initializeAnalysis(Registry);
574 initializeIPA(Registry);
575 initializeTransformUtils(Registry);
576 initializeInstCombine(Registry);
577 initializeInstrumentation(Registry);
578 initializeTarget(Registry);
580 cl::ParseCommandLineOptions(argc, argv,
581 "llvm .bc -> .bc modular optimizer and analysis printer\n");
583 if (AnalyzeOnly && NoOutput) {
584 errs() << argv[0] << ": analyze mode conflicts with no-output mode.\n";
590 // Load the input module...
592 M.reset(ParseIRFile(InputFilename, Err, Context));
595 Err.print(argv[0], errs());
599 // If we are supposed to override the target triple, do so now.
600 if (!TargetTriple.empty())
601 M->setTargetTriple(Triple::normalize(TargetTriple));
603 // Figure out what stream we are supposed to write to...
604 OwningPtr<tool_output_file> Out;
606 if (!OutputFilename.empty())
607 errs() << "WARNING: The -o (output filename) option is ignored when\n"
608 "the --disable-output option is used.\n";
610 // Default to standard output.
611 if (OutputFilename.empty())
612 OutputFilename = "-";
614 std::string ErrorInfo;
615 Out.reset(new tool_output_file(OutputFilename.c_str(), ErrorInfo,
616 raw_fd_ostream::F_Binary));
617 if (!ErrorInfo.empty()) {
618 errs() << ErrorInfo << '\n';
623 // If the output is set to be emitted to standard out, and standard out is a
624 // console, print out a warning message and refuse to do it. We don't
625 // impress anyone by spewing tons of binary goo to a terminal.
626 if (!Force && !NoOutput && !AnalyzeOnly && !OutputAssembly)
627 if (CheckBitcodeOutputToConsole(Out->os(), !Quiet))
630 // Create a PassManager to hold and optimize the collection of passes we are
635 // Add an appropriate TargetLibraryInfo pass for the module's triple.
636 TargetLibraryInfo *TLI = new TargetLibraryInfo(Triple(M->getTargetTriple()));
638 // The -disable-simplify-libcalls flag actually disables all builtin optzns.
639 if (DisableSimplifyLibCalls)
640 TLI->disableAllFunctions();
643 // Add an appropriate DataLayout instance for this module.
645 const std::string &ModuleDataLayout = M.get()->getDataLayout();
646 if (!ModuleDataLayout.empty())
647 TD = new DataLayout(ModuleDataLayout);
648 else if (!DefaultDataLayout.empty())
649 TD = new DataLayout(DefaultDataLayout);
654 Triple ModuleTriple(M->getTargetTriple());
655 TargetMachine *Machine = 0;
656 if (ModuleTriple.getArch())
657 Machine = GetTargetMachine(Triple(ModuleTriple));
658 OwningPtr<TargetMachine> TM(Machine);
660 // Add internal analysis passes from the target machine.
662 TM->addAnalysisPasses(Passes);
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.run(*M.get());
826 if (!NoOutput || PrintBreakpoints)