1 //===- PassManager.cpp - LLVM Pass Infrastructure Implementation ----------===//
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 file implements the LLVM Pass Manager infrastructure.
12 //===----------------------------------------------------------------------===//
15 #include "llvm/PassManagers.h"
16 #include "llvm/PassManager.h"
17 #include "llvm/Assembly/PrintModulePass.h"
18 #include "llvm/Assembly/Writer.h"
19 #include "llvm/Support/CommandLine.h"
20 #include "llvm/Support/Debug.h"
21 #include "llvm/Support/Timer.h"
22 #include "llvm/Module.h"
23 #include "llvm/Support/ErrorHandling.h"
24 #include "llvm/Support/ManagedStatic.h"
25 #include "llvm/Support/PassNameParser.h"
26 #include "llvm/Support/raw_ostream.h"
27 #include "llvm/Support/Mutex.h"
32 // See PassManagers.h for Pass Manager infrastructure overview.
36 //===----------------------------------------------------------------------===//
37 // Pass debugging information. Often it is useful to find out what pass is
38 // running when a crash occurs in a utility. When this library is compiled with
39 // debugging on, a command line option (--debug-pass) is enabled that causes the
40 // pass name to be printed before it executes.
43 // Different debug levels that can be enabled...
45 None, Arguments, Structure, Executions, Details
48 static cl::opt<enum PassDebugLevel>
49 PassDebugging("debug-pass", cl::Hidden,
50 cl::desc("Print PassManager debugging information"),
52 clEnumVal(None , "disable debug output"),
53 clEnumVal(Arguments , "print pass arguments to pass to 'opt'"),
54 clEnumVal(Structure , "print pass structure before run()"),
55 clEnumVal(Executions, "print pass name before it is executed"),
56 clEnumVal(Details , "print pass details when it is executed"),
59 typedef llvm::cl::list<const llvm::PassInfo *, bool, PassNameParser>
62 // Print IR out before/after specified passes.
64 PrintBefore("print-before",
65 llvm::cl::desc("Print IR before specified passes"),
69 PrintAfter("print-after",
70 llvm::cl::desc("Print IR after specified passes"),
74 PrintBeforeAll("print-before-all",
75 llvm::cl::desc("Print IR before each pass"),
78 PrintAfterAll("print-after-all",
79 llvm::cl::desc("Print IR after each pass"),
82 /// This is a helper to determine whether to print IR before or
85 static bool ShouldPrintBeforeOrAfterPass(const PassInfo *PI,
86 PassOptionList &PassesToPrint) {
87 for (unsigned i = 0, ie = PassesToPrint.size(); i < ie; ++i) {
88 const llvm::PassInfo *PassInf = PassesToPrint[i];
90 if (PassInf->getPassArgument() == PI->getPassArgument()) {
97 /// This is a utility to check whether a pass should have IR dumped
99 static bool ShouldPrintBeforePass(const PassInfo *PI) {
100 return PrintBeforeAll || ShouldPrintBeforeOrAfterPass(PI, PrintBefore);
103 /// This is a utility to check whether a pass should have IR dumped
105 static bool ShouldPrintAfterPass(const PassInfo *PI) {
106 return PrintAfterAll || ShouldPrintBeforeOrAfterPass(PI, PrintAfter);
109 } // End of llvm namespace
111 /// isPassDebuggingExecutionsOrMore - Return true if -debug-pass=Executions
112 /// or higher is specified.
113 bool PMDataManager::isPassDebuggingExecutionsOrMore() const {
114 return PassDebugging >= Executions;
120 void PassManagerPrettyStackEntry::print(raw_ostream &OS) const {
121 if (V == 0 && M == 0)
122 OS << "Releasing pass '";
124 OS << "Running pass '";
126 OS << P->getPassName() << "'";
129 OS << " on module '" << M->getModuleIdentifier() << "'.\n";
138 if (isa<Function>(V))
140 else if (isa<BasicBlock>(V))
146 WriteAsOperand(OS, V, /*PrintTy=*/false, M);
153 //===----------------------------------------------------------------------===//
156 /// BBPassManager manages BasicBlockPass. It batches all the
157 /// pass together and sequence them to process one basic block before
158 /// processing next basic block.
159 class BBPassManager : public PMDataManager, public FunctionPass {
163 explicit BBPassManager()
164 : PMDataManager(), FunctionPass(ID) {}
166 /// Execute all of the passes scheduled for execution. Keep track of
167 /// whether any of the passes modifies the function, and if so, return true.
168 bool runOnFunction(Function &F);
170 /// Pass Manager itself does not invalidate any analysis info.
171 void getAnalysisUsage(AnalysisUsage &Info) const {
172 Info.setPreservesAll();
175 bool doInitialization(Module &M);
176 bool doInitialization(Function &F);
177 bool doFinalization(Module &M);
178 bool doFinalization(Function &F);
180 virtual PMDataManager *getAsPMDataManager() { return this; }
181 virtual Pass *getAsPass() { return this; }
183 virtual const char *getPassName() const {
184 return "BasicBlock Pass Manager";
187 // Print passes managed by this manager
188 void dumpPassStructure(unsigned Offset) {
189 llvm::dbgs().indent(Offset*2) << "BasicBlockPass Manager\n";
190 for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
191 BasicBlockPass *BP = getContainedPass(Index);
192 BP->dumpPassStructure(Offset + 1);
193 dumpLastUses(BP, Offset+1);
197 BasicBlockPass *getContainedPass(unsigned N) {
198 assert(N < PassVector.size() && "Pass number out of range!");
199 BasicBlockPass *BP = static_cast<BasicBlockPass *>(PassVector[N]);
203 virtual PassManagerType getPassManagerType() const {
204 return PMT_BasicBlockPassManager;
208 char BBPassManager::ID = 0;
213 //===----------------------------------------------------------------------===//
214 // FunctionPassManagerImpl
216 /// FunctionPassManagerImpl manages FPPassManagers
217 class FunctionPassManagerImpl : public Pass,
218 public PMDataManager,
219 public PMTopLevelManager {
220 virtual void anchor();
225 explicit FunctionPassManagerImpl() :
226 Pass(PT_PassManager, ID), PMDataManager(),
227 PMTopLevelManager(new FPPassManager()), wasRun(false) {}
229 /// add - Add a pass to the queue of passes to run. This passes ownership of
230 /// the Pass to the PassManager. When the PassManager is destroyed, the pass
231 /// will be destroyed as well, so there is no need to delete the pass. This
232 /// implies that all passes MUST be allocated with 'new'.
237 /// createPrinterPass - Get a function printer pass.
238 Pass *createPrinterPass(raw_ostream &O, const std::string &Banner) const {
239 return createPrintFunctionPass(Banner, &O);
242 // Prepare for running an on the fly pass, freeing memory if needed
243 // from a previous run.
244 void releaseMemoryOnTheFly();
246 /// run - Execute all of the passes scheduled for execution. Keep track of
247 /// whether any of the passes modifies the module, and if so, return true.
248 bool run(Function &F);
250 /// doInitialization - Run all of the initializers for the function passes.
252 bool doInitialization(Module &M);
254 /// doFinalization - Run all of the finalizers for the function passes.
256 bool doFinalization(Module &M);
259 virtual PMDataManager *getAsPMDataManager() { return this; }
260 virtual Pass *getAsPass() { return this; }
261 virtual PassManagerType getTopLevelPassManagerType() {
262 return PMT_FunctionPassManager;
265 /// Pass Manager itself does not invalidate any analysis info.
266 void getAnalysisUsage(AnalysisUsage &Info) const {
267 Info.setPreservesAll();
270 FPPassManager *getContainedManager(unsigned N) {
271 assert(N < PassManagers.size() && "Pass number out of range!");
272 FPPassManager *FP = static_cast<FPPassManager *>(PassManagers[N]);
277 void FunctionPassManagerImpl::anchor() {}
279 char FunctionPassManagerImpl::ID = 0;
281 //===----------------------------------------------------------------------===//
284 /// MPPassManager manages ModulePasses and function pass managers.
285 /// It batches all Module passes and function pass managers together and
286 /// sequences them to process one module.
287 class MPPassManager : public Pass, public PMDataManager {
290 explicit MPPassManager() :
291 Pass(PT_PassManager, ID), PMDataManager() { }
293 // Delete on the fly managers.
294 virtual ~MPPassManager() {
295 for (std::map<Pass *, FunctionPassManagerImpl *>::iterator
296 I = OnTheFlyManagers.begin(), E = OnTheFlyManagers.end();
298 FunctionPassManagerImpl *FPP = I->second;
303 /// createPrinterPass - Get a module printer pass.
304 Pass *createPrinterPass(raw_ostream &O, const std::string &Banner) const {
305 return createPrintModulePass(&O, false, Banner);
308 /// run - Execute all of the passes scheduled for execution. Keep track of
309 /// whether any of the passes modifies the module, and if so, return true.
310 bool runOnModule(Module &M);
312 /// doInitialization - Run all of the initializers for the module passes.
314 bool doInitialization(void);
316 /// doFinalization - Run all of the finalizers for the module passes.
318 bool doFinalization(void);
320 /// Pass Manager itself does not invalidate any analysis info.
321 void getAnalysisUsage(AnalysisUsage &Info) const {
322 Info.setPreservesAll();
325 /// Add RequiredPass into list of lower level passes required by pass P.
326 /// RequiredPass is run on the fly by Pass Manager when P requests it
327 /// through getAnalysis interface.
328 virtual void addLowerLevelRequiredPass(Pass *P, Pass *RequiredPass);
330 /// Return function pass corresponding to PassInfo PI, that is
331 /// required by module pass MP. Instantiate analysis pass, by using
332 /// its runOnFunction() for function F.
333 virtual Pass* getOnTheFlyPass(Pass *MP, AnalysisID PI, Function &F);
335 virtual const char *getPassName() const {
336 return "Module Pass Manager";
339 virtual PMDataManager *getAsPMDataManager() { return this; }
340 virtual Pass *getAsPass() { return this; }
342 // Print passes managed by this manager
343 void dumpPassStructure(unsigned Offset) {
344 llvm::dbgs().indent(Offset*2) << "ModulePass Manager\n";
345 for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
346 ModulePass *MP = getContainedPass(Index);
347 MP->dumpPassStructure(Offset + 1);
348 std::map<Pass *, FunctionPassManagerImpl *>::const_iterator I =
349 OnTheFlyManagers.find(MP);
350 if (I != OnTheFlyManagers.end())
351 I->second->dumpPassStructure(Offset + 2);
352 dumpLastUses(MP, Offset+1);
356 ModulePass *getContainedPass(unsigned N) {
357 assert(N < PassVector.size() && "Pass number out of range!");
358 return static_cast<ModulePass *>(PassVector[N]);
361 virtual PassManagerType getPassManagerType() const {
362 return PMT_ModulePassManager;
366 /// Collection of on the fly FPPassManagers. These managers manage
367 /// function passes that are required by module passes.
368 std::map<Pass *, FunctionPassManagerImpl *> OnTheFlyManagers;
371 char MPPassManager::ID = 0;
372 //===----------------------------------------------------------------------===//
376 /// PassManagerImpl manages MPPassManagers
377 class PassManagerImpl : public Pass,
378 public PMDataManager,
379 public PMTopLevelManager {
380 virtual void anchor();
384 explicit PassManagerImpl() :
385 Pass(PT_PassManager, ID), PMDataManager(),
386 PMTopLevelManager(new MPPassManager()) {}
388 /// add - Add a pass to the queue of passes to run. This passes ownership of
389 /// the Pass to the PassManager. When the PassManager is destroyed, the pass
390 /// will be destroyed as well, so there is no need to delete the pass. This
391 /// implies that all passes MUST be allocated with 'new'.
396 /// createPrinterPass - Get a module printer pass.
397 Pass *createPrinterPass(raw_ostream &O, const std::string &Banner) const {
398 return createPrintModulePass(&O, false, Banner);
401 /// run - Execute all of the passes scheduled for execution. Keep track of
402 /// whether any of the passes modifies the module, and if so, return true.
405 /// doInitialization - Run all of the initializers for the module passes.
407 bool doInitialization(void);
409 /// doFinalization - Run all of the finalizers for the module passes.
411 bool doFinalization(void);
413 /// Pass Manager itself does not invalidate any analysis info.
414 void getAnalysisUsage(AnalysisUsage &Info) const {
415 Info.setPreservesAll();
418 virtual PMDataManager *getAsPMDataManager() { return this; }
419 virtual Pass *getAsPass() { return this; }
420 virtual PassManagerType getTopLevelPassManagerType() {
421 return PMT_ModulePassManager;
424 MPPassManager *getContainedManager(unsigned N) {
425 assert(N < PassManagers.size() && "Pass number out of range!");
426 MPPassManager *MP = static_cast<MPPassManager *>(PassManagers[N]);
431 void PassManagerImpl::anchor() {}
433 char PassManagerImpl::ID = 0;
434 } // End of llvm namespace
438 //===----------------------------------------------------------------------===//
439 /// TimingInfo Class - This class is used to calculate information about the
440 /// amount of time each pass takes to execute. This only happens when
441 /// -time-passes is enabled on the command line.
444 static ManagedStatic<sys::SmartMutex<true> > TimingInfoMutex;
447 DenseMap<Pass*, Timer*> TimingData;
450 // Use 'create' member to get this.
451 TimingInfo() : TG("... Pass execution timing report ...") {}
453 // TimingDtor - Print out information about timing information
455 // Delete all of the timers, which accumulate their info into the
457 for (DenseMap<Pass*, Timer*>::iterator I = TimingData.begin(),
458 E = TimingData.end(); I != E; ++I)
460 // TimerGroup is deleted next, printing the report.
463 // createTheTimeInfo - This method either initializes the TheTimeInfo pointer
464 // to a non null value (if the -time-passes option is enabled) or it leaves it
465 // null. It may be called multiple times.
466 static void createTheTimeInfo();
468 /// getPassTimer - Return the timer for the specified pass if it exists.
469 Timer *getPassTimer(Pass *P) {
470 if (P->getAsPMDataManager())
473 sys::SmartScopedLock<true> Lock(*TimingInfoMutex);
474 Timer *&T = TimingData[P];
476 T = new Timer(P->getPassName(), TG);
481 } // End of anon namespace
483 static TimingInfo *TheTimeInfo;
485 //===----------------------------------------------------------------------===//
486 // PMTopLevelManager implementation
488 /// Initialize top level manager. Create first pass manager.
489 PMTopLevelManager::PMTopLevelManager(PMDataManager *PMDM) {
490 PMDM->setTopLevelManager(this);
491 addPassManager(PMDM);
492 activeStack.push(PMDM);
495 /// Set pass P as the last user of the given analysis passes.
497 PMTopLevelManager::setLastUser(ArrayRef<Pass*> AnalysisPasses, Pass *P) {
499 if (P->getResolver())
500 PDepth = P->getResolver()->getPMDataManager().getDepth();
502 for (SmallVectorImpl<Pass *>::const_iterator I = AnalysisPasses.begin(),
503 E = AnalysisPasses.end(); I != E; ++I) {
510 // Update the last users of passes that are required transitive by AP.
511 AnalysisUsage *AnUsage = findAnalysisUsage(AP);
512 const AnalysisUsage::VectorType &IDs = AnUsage->getRequiredTransitiveSet();
513 SmallVector<Pass *, 12> LastUses;
514 SmallVector<Pass *, 12> LastPMUses;
515 for (AnalysisUsage::VectorType::const_iterator I = IDs.begin(),
516 E = IDs.end(); I != E; ++I) {
517 Pass *AnalysisPass = findAnalysisPass(*I);
518 assert(AnalysisPass && "Expected analysis pass to exist.");
519 AnalysisResolver *AR = AnalysisPass->getResolver();
520 assert(AR && "Expected analysis resolver to exist.");
521 unsigned APDepth = AR->getPMDataManager().getDepth();
523 if (PDepth == APDepth)
524 LastUses.push_back(AnalysisPass);
525 else if (PDepth > APDepth)
526 LastPMUses.push_back(AnalysisPass);
529 setLastUser(LastUses, P);
531 // If this pass has a corresponding pass manager, push higher level
532 // analysis to this pass manager.
533 if (P->getResolver())
534 setLastUser(LastPMUses, P->getResolver()->getPMDataManager().getAsPass());
537 // If AP is the last user of other passes then make P last user of
539 for (DenseMap<Pass *, Pass *>::iterator LUI = LastUser.begin(),
540 LUE = LastUser.end(); LUI != LUE; ++LUI) {
541 if (LUI->second == AP)
542 // DenseMap iterator is not invalidated here because
543 // this is just updating existing entries.
544 LastUser[LUI->first] = P;
549 /// Collect passes whose last user is P
550 void PMTopLevelManager::collectLastUses(SmallVectorImpl<Pass *> &LastUses,
552 DenseMap<Pass *, SmallPtrSet<Pass *, 8> >::iterator DMI =
553 InversedLastUser.find(P);
554 if (DMI == InversedLastUser.end())
557 SmallPtrSet<Pass *, 8> &LU = DMI->second;
558 for (SmallPtrSet<Pass *, 8>::iterator I = LU.begin(),
559 E = LU.end(); I != E; ++I) {
560 LastUses.push_back(*I);
565 AnalysisUsage *PMTopLevelManager::findAnalysisUsage(Pass *P) {
566 AnalysisUsage *AnUsage = NULL;
567 DenseMap<Pass *, AnalysisUsage *>::iterator DMI = AnUsageMap.find(P);
568 if (DMI != AnUsageMap.end())
569 AnUsage = DMI->second;
571 AnUsage = new AnalysisUsage();
572 P->getAnalysisUsage(*AnUsage);
573 AnUsageMap[P] = AnUsage;
578 /// Schedule pass P for execution. Make sure that passes required by
579 /// P are run before P is run. Update analysis info maintained by
580 /// the manager. Remove dead passes. This is a recursive function.
581 void PMTopLevelManager::schedulePass(Pass *P) {
583 // TODO : Allocate function manager for this pass, other wise required set
584 // may be inserted into previous function manager
586 // Give pass a chance to prepare the stage.
587 P->preparePassManager(activeStack);
589 // If P is an analysis pass and it is available then do not
590 // generate the analysis again. Stale analysis info should not be
591 // available at this point.
593 PassRegistry::getPassRegistry()->getPassInfo(P->getPassID());
594 if (PI && PI->isAnalysis() && findAnalysisPass(P->getPassID())) {
599 AnalysisUsage *AnUsage = findAnalysisUsage(P);
601 bool checkAnalysis = true;
602 while (checkAnalysis) {
603 checkAnalysis = false;
605 const AnalysisUsage::VectorType &RequiredSet = AnUsage->getRequiredSet();
606 for (AnalysisUsage::VectorType::const_iterator I = RequiredSet.begin(),
607 E = RequiredSet.end(); I != E; ++I) {
609 Pass *AnalysisPass = findAnalysisPass(*I);
611 const PassInfo *PI = PassRegistry::getPassRegistry()->getPassInfo(*I);
614 // Pass P is not in the global PassRegistry
615 dbgs() << "Pass '" << P->getPassName() << "' is not initialized." << "\n";
616 dbgs() << "Verify if there is a pass dependency cycle." << "\n";
617 dbgs() << "Required Passes:" << "\n";
618 for (AnalysisUsage::VectorType::const_iterator I2 = RequiredSet.begin(),
619 E = RequiredSet.end(); I2 != E && I2 != I; ++I2) {
620 Pass *AnalysisPass2 = findAnalysisPass(*I2);
622 dbgs() << "\t" << AnalysisPass2->getPassName() << "\n";
625 dbgs() << "\t" << "Error: Required pass not found! Possible causes:" << "\n";
626 dbgs() << "\t\t" << "- Pass misconfiguration (e.g.: missing macros)" << "\n";
627 dbgs() << "\t\t" << "- Corruption of the global PassRegistry" << "\n";
632 assert(PI && "Expected required passes to be initialized");
633 AnalysisPass = PI->createPass();
634 if (P->getPotentialPassManagerType () ==
635 AnalysisPass->getPotentialPassManagerType())
636 // Schedule analysis pass that is managed by the same pass manager.
637 schedulePass(AnalysisPass);
638 else if (P->getPotentialPassManagerType () >
639 AnalysisPass->getPotentialPassManagerType()) {
640 // Schedule analysis pass that is managed by a new manager.
641 schedulePass(AnalysisPass);
642 // Recheck analysis passes to ensure that required analyses that
643 // are already checked are still available.
644 checkAnalysis = true;
647 // Do not schedule this analysis. Lower level analsyis
648 // passes are run on the fly.
654 // Now all required passes are available.
655 if (ImmutablePass *IP = P->getAsImmutablePass()) {
656 // P is a immutable pass and it will be managed by this
657 // top level manager. Set up analysis resolver to connect them.
658 PMDataManager *DM = getAsPMDataManager();
659 AnalysisResolver *AR = new AnalysisResolver(*DM);
661 DM->initializeAnalysisImpl(P);
662 addImmutablePass(IP);
663 DM->recordAvailableAnalysis(IP);
667 if (PI && !PI->isAnalysis() && ShouldPrintBeforePass(PI)) {
668 Pass *PP = P->createPrinterPass(
669 dbgs(), std::string("*** IR Dump Before ") + P->getPassName() + " ***");
670 PP->assignPassManager(activeStack, getTopLevelPassManagerType());
673 // Add the requested pass to the best available pass manager.
674 P->assignPassManager(activeStack, getTopLevelPassManagerType());
676 if (PI && !PI->isAnalysis() && ShouldPrintAfterPass(PI)) {
677 Pass *PP = P->createPrinterPass(
678 dbgs(), std::string("*** IR Dump After ") + P->getPassName() + " ***");
679 PP->assignPassManager(activeStack, getTopLevelPassManagerType());
683 /// Find the pass that implements Analysis AID. Search immutable
684 /// passes and all pass managers. If desired pass is not found
685 /// then return NULL.
686 Pass *PMTopLevelManager::findAnalysisPass(AnalysisID AID) {
688 // Check pass managers
689 for (SmallVectorImpl<PMDataManager *>::iterator I = PassManagers.begin(),
690 E = PassManagers.end(); I != E; ++I)
691 if (Pass *P = (*I)->findAnalysisPass(AID, false))
694 // Check other pass managers
695 for (SmallVectorImpl<PMDataManager *>::iterator
696 I = IndirectPassManagers.begin(),
697 E = IndirectPassManagers.end(); I != E; ++I)
698 if (Pass *P = (*I)->findAnalysisPass(AID, false))
701 // Check the immutable passes. Iterate in reverse order so that we find
702 // the most recently registered passes first.
703 for (SmallVector<ImmutablePass *, 8>::reverse_iterator I =
704 ImmutablePasses.rbegin(), E = ImmutablePasses.rend(); I != E; ++I) {
705 AnalysisID PI = (*I)->getPassID();
709 // If Pass not found then check the interfaces implemented by Immutable Pass
710 const PassInfo *PassInf =
711 PassRegistry::getPassRegistry()->getPassInfo(PI);
712 assert(PassInf && "Expected all immutable passes to be initialized");
713 const std::vector<const PassInfo*> &ImmPI =
714 PassInf->getInterfacesImplemented();
715 for (std::vector<const PassInfo*>::const_iterator II = ImmPI.begin(),
716 EE = ImmPI.end(); II != EE; ++II) {
717 if ((*II)->getTypeInfo() == AID)
725 // Print passes managed by this top level manager.
726 void PMTopLevelManager::dumpPasses() const {
728 if (PassDebugging < Structure)
731 // Print out the immutable passes
732 for (unsigned i = 0, e = ImmutablePasses.size(); i != e; ++i) {
733 ImmutablePasses[i]->dumpPassStructure(0);
736 // Every class that derives from PMDataManager also derives from Pass
737 // (sometimes indirectly), but there's no inheritance relationship
738 // between PMDataManager and Pass, so we have to getAsPass to get
739 // from a PMDataManager* to a Pass*.
740 for (SmallVector<PMDataManager *, 8>::const_iterator I = PassManagers.begin(),
741 E = PassManagers.end(); I != E; ++I)
742 (*I)->getAsPass()->dumpPassStructure(1);
745 void PMTopLevelManager::dumpArguments() const {
747 if (PassDebugging < Arguments)
750 dbgs() << "Pass Arguments: ";
751 for (SmallVector<ImmutablePass *, 8>::const_iterator I =
752 ImmutablePasses.begin(), E = ImmutablePasses.end(); I != E; ++I)
753 if (const PassInfo *PI =
754 PassRegistry::getPassRegistry()->getPassInfo((*I)->getPassID())) {
755 assert(PI && "Expected all immutable passes to be initialized");
756 if (!PI->isAnalysisGroup())
757 dbgs() << " -" << PI->getPassArgument();
759 for (SmallVector<PMDataManager *, 8>::const_iterator I = PassManagers.begin(),
760 E = PassManagers.end(); I != E; ++I)
761 (*I)->dumpPassArguments();
765 void PMTopLevelManager::initializeAllAnalysisInfo() {
766 for (SmallVectorImpl<PMDataManager *>::iterator I = PassManagers.begin(),
767 E = PassManagers.end(); I != E; ++I)
768 (*I)->initializeAnalysisInfo();
770 // Initailize other pass managers
771 for (SmallVectorImpl<PMDataManager *>::iterator
772 I = IndirectPassManagers.begin(), E = IndirectPassManagers.end();
774 (*I)->initializeAnalysisInfo();
776 for (DenseMap<Pass *, Pass *>::iterator DMI = LastUser.begin(),
777 DME = LastUser.end(); DMI != DME; ++DMI) {
778 DenseMap<Pass *, SmallPtrSet<Pass *, 8> >::iterator InvDMI =
779 InversedLastUser.find(DMI->second);
780 if (InvDMI != InversedLastUser.end()) {
781 SmallPtrSet<Pass *, 8> &L = InvDMI->second;
782 L.insert(DMI->first);
784 SmallPtrSet<Pass *, 8> L; L.insert(DMI->first);
785 InversedLastUser[DMI->second] = L;
791 PMTopLevelManager::~PMTopLevelManager() {
792 for (SmallVectorImpl<PMDataManager *>::iterator I = PassManagers.begin(),
793 E = PassManagers.end(); I != E; ++I)
796 for (SmallVectorImpl<ImmutablePass *>::iterator
797 I = ImmutablePasses.begin(), E = ImmutablePasses.end(); I != E; ++I)
800 for (DenseMap<Pass *, AnalysisUsage *>::iterator DMI = AnUsageMap.begin(),
801 DME = AnUsageMap.end(); DMI != DME; ++DMI)
805 //===----------------------------------------------------------------------===//
806 // PMDataManager implementation
808 /// Augement AvailableAnalysis by adding analysis made available by pass P.
809 void PMDataManager::recordAvailableAnalysis(Pass *P) {
810 AnalysisID PI = P->getPassID();
812 AvailableAnalysis[PI] = P;
814 assert(!AvailableAnalysis.empty());
816 // This pass is the current implementation of all of the interfaces it
817 // implements as well.
818 const PassInfo *PInf = PassRegistry::getPassRegistry()->getPassInfo(PI);
819 if (PInf == 0) return;
820 const std::vector<const PassInfo*> &II = PInf->getInterfacesImplemented();
821 for (unsigned i = 0, e = II.size(); i != e; ++i)
822 AvailableAnalysis[II[i]->getTypeInfo()] = P;
825 // Return true if P preserves high level analysis used by other
826 // passes managed by this manager
827 bool PMDataManager::preserveHigherLevelAnalysis(Pass *P) {
828 AnalysisUsage *AnUsage = TPM->findAnalysisUsage(P);
829 if (AnUsage->getPreservesAll())
832 const AnalysisUsage::VectorType &PreservedSet = AnUsage->getPreservedSet();
833 for (SmallVectorImpl<Pass *>::iterator I = HigherLevelAnalysis.begin(),
834 E = HigherLevelAnalysis.end(); I != E; ++I) {
836 if (P1->getAsImmutablePass() == 0 &&
837 std::find(PreservedSet.begin(), PreservedSet.end(),
846 /// verifyPreservedAnalysis -- Verify analysis preserved by pass P.
847 void PMDataManager::verifyPreservedAnalysis(Pass *P) {
848 // Don't do this unless assertions are enabled.
852 AnalysisUsage *AnUsage = TPM->findAnalysisUsage(P);
853 const AnalysisUsage::VectorType &PreservedSet = AnUsage->getPreservedSet();
855 // Verify preserved analysis
856 for (AnalysisUsage::VectorType::const_iterator I = PreservedSet.begin(),
857 E = PreservedSet.end(); I != E; ++I) {
859 if (Pass *AP = findAnalysisPass(AID, true)) {
860 TimeRegion PassTimer(getPassTimer(AP));
861 AP->verifyAnalysis();
866 /// Remove Analysis not preserved by Pass P
867 void PMDataManager::removeNotPreservedAnalysis(Pass *P) {
868 AnalysisUsage *AnUsage = TPM->findAnalysisUsage(P);
869 if (AnUsage->getPreservesAll())
872 const AnalysisUsage::VectorType &PreservedSet = AnUsage->getPreservedSet();
873 for (std::map<AnalysisID, Pass*>::iterator I = AvailableAnalysis.begin(),
874 E = AvailableAnalysis.end(); I != E; ) {
875 std::map<AnalysisID, Pass*>::iterator Info = I++;
876 if (Info->second->getAsImmutablePass() == 0 &&
877 std::find(PreservedSet.begin(), PreservedSet.end(), Info->first) ==
878 PreservedSet.end()) {
879 // Remove this analysis
880 if (PassDebugging >= Details) {
881 Pass *S = Info->second;
882 dbgs() << " -- '" << P->getPassName() << "' is not preserving '";
883 dbgs() << S->getPassName() << "'\n";
885 AvailableAnalysis.erase(Info);
889 // Check inherited analysis also. If P is not preserving analysis
890 // provided by parent manager then remove it here.
891 for (unsigned Index = 0; Index < PMT_Last; ++Index) {
893 if (!InheritedAnalysis[Index])
896 for (std::map<AnalysisID, Pass*>::iterator
897 I = InheritedAnalysis[Index]->begin(),
898 E = InheritedAnalysis[Index]->end(); I != E; ) {
899 std::map<AnalysisID, Pass *>::iterator Info = I++;
900 if (Info->second->getAsImmutablePass() == 0 &&
901 std::find(PreservedSet.begin(), PreservedSet.end(), Info->first) ==
902 PreservedSet.end()) {
903 // Remove this analysis
904 if (PassDebugging >= Details) {
905 Pass *S = Info->second;
906 dbgs() << " -- '" << P->getPassName() << "' is not preserving '";
907 dbgs() << S->getPassName() << "'\n";
909 InheritedAnalysis[Index]->erase(Info);
915 /// Remove analysis passes that are not used any longer
916 void PMDataManager::removeDeadPasses(Pass *P, StringRef Msg,
917 enum PassDebuggingString DBG_STR) {
919 SmallVector<Pass *, 12> DeadPasses;
921 // If this is a on the fly manager then it does not have TPM.
925 TPM->collectLastUses(DeadPasses, P);
927 if (PassDebugging >= Details && !DeadPasses.empty()) {
928 dbgs() << " -*- '" << P->getPassName();
929 dbgs() << "' is the last user of following pass instances.";
930 dbgs() << " Free these instances\n";
933 for (SmallVectorImpl<Pass *>::iterator I = DeadPasses.begin(),
934 E = DeadPasses.end(); I != E; ++I)
935 freePass(*I, Msg, DBG_STR);
938 void PMDataManager::freePass(Pass *P, StringRef Msg,
939 enum PassDebuggingString DBG_STR) {
940 dumpPassInfo(P, FREEING_MSG, DBG_STR, Msg);
943 // If the pass crashes releasing memory, remember this.
944 PassManagerPrettyStackEntry X(P);
945 TimeRegion PassTimer(getPassTimer(P));
950 AnalysisID PI = P->getPassID();
951 if (const PassInfo *PInf = PassRegistry::getPassRegistry()->getPassInfo(PI)) {
952 // Remove the pass itself (if it is not already removed).
953 AvailableAnalysis.erase(PI);
955 // Remove all interfaces this pass implements, for which it is also
956 // listed as the available implementation.
957 const std::vector<const PassInfo*> &II = PInf->getInterfacesImplemented();
958 for (unsigned i = 0, e = II.size(); i != e; ++i) {
959 std::map<AnalysisID, Pass*>::iterator Pos =
960 AvailableAnalysis.find(II[i]->getTypeInfo());
961 if (Pos != AvailableAnalysis.end() && Pos->second == P)
962 AvailableAnalysis.erase(Pos);
967 /// Add pass P into the PassVector. Update
968 /// AvailableAnalysis appropriately if ProcessAnalysis is true.
969 void PMDataManager::add(Pass *P, bool ProcessAnalysis) {
970 // This manager is going to manage pass P. Set up analysis resolver
972 AnalysisResolver *AR = new AnalysisResolver(*this);
975 // If a FunctionPass F is the last user of ModulePass info M
976 // then the F's manager, not F, records itself as a last user of M.
977 SmallVector<Pass *, 12> TransferLastUses;
979 if (!ProcessAnalysis) {
981 PassVector.push_back(P);
985 // At the moment, this pass is the last user of all required passes.
986 SmallVector<Pass *, 12> LastUses;
987 SmallVector<Pass *, 8> RequiredPasses;
988 SmallVector<AnalysisID, 8> ReqAnalysisNotAvailable;
990 unsigned PDepth = this->getDepth();
992 collectRequiredAnalysis(RequiredPasses,
993 ReqAnalysisNotAvailable, P);
994 for (SmallVectorImpl<Pass *>::iterator I = RequiredPasses.begin(),
995 E = RequiredPasses.end(); I != E; ++I) {
996 Pass *PRequired = *I;
999 assert(PRequired->getResolver() && "Analysis Resolver is not set");
1000 PMDataManager &DM = PRequired->getResolver()->getPMDataManager();
1001 RDepth = DM.getDepth();
1003 if (PDepth == RDepth)
1004 LastUses.push_back(PRequired);
1005 else if (PDepth > RDepth) {
1006 // Let the parent claim responsibility of last use
1007 TransferLastUses.push_back(PRequired);
1008 // Keep track of higher level analysis used by this manager.
1009 HigherLevelAnalysis.push_back(PRequired);
1011 llvm_unreachable("Unable to accommodate Required Pass");
1014 // Set P as P's last user until someone starts using P.
1015 // However, if P is a Pass Manager then it does not need
1016 // to record its last user.
1017 if (P->getAsPMDataManager() == 0)
1018 LastUses.push_back(P);
1019 TPM->setLastUser(LastUses, P);
1021 if (!TransferLastUses.empty()) {
1022 Pass *My_PM = getAsPass();
1023 TPM->setLastUser(TransferLastUses, My_PM);
1024 TransferLastUses.clear();
1027 // Now, take care of required analyses that are not available.
1028 for (SmallVectorImpl<AnalysisID>::iterator
1029 I = ReqAnalysisNotAvailable.begin(),
1030 E = ReqAnalysisNotAvailable.end() ;I != E; ++I) {
1031 const PassInfo *PI = PassRegistry::getPassRegistry()->getPassInfo(*I);
1032 Pass *AnalysisPass = PI->createPass();
1033 this->addLowerLevelRequiredPass(P, AnalysisPass);
1036 // Take a note of analysis required and made available by this pass.
1037 // Remove the analysis not preserved by this pass
1038 removeNotPreservedAnalysis(P);
1039 recordAvailableAnalysis(P);
1042 PassVector.push_back(P);
1046 /// Populate RP with analysis pass that are required by
1047 /// pass P and are available. Populate RP_NotAvail with analysis
1048 /// pass that are required by pass P but are not available.
1049 void PMDataManager::collectRequiredAnalysis(SmallVectorImpl<Pass *> &RP,
1050 SmallVectorImpl<AnalysisID> &RP_NotAvail,
1052 AnalysisUsage *AnUsage = TPM->findAnalysisUsage(P);
1053 const AnalysisUsage::VectorType &RequiredSet = AnUsage->getRequiredSet();
1054 for (AnalysisUsage::VectorType::const_iterator
1055 I = RequiredSet.begin(), E = RequiredSet.end(); I != E; ++I) {
1056 if (Pass *AnalysisPass = findAnalysisPass(*I, true))
1057 RP.push_back(AnalysisPass);
1059 RP_NotAvail.push_back(*I);
1062 const AnalysisUsage::VectorType &IDs = AnUsage->getRequiredTransitiveSet();
1063 for (AnalysisUsage::VectorType::const_iterator I = IDs.begin(),
1064 E = IDs.end(); I != E; ++I) {
1065 if (Pass *AnalysisPass = findAnalysisPass(*I, true))
1066 RP.push_back(AnalysisPass);
1068 RP_NotAvail.push_back(*I);
1072 // All Required analyses should be available to the pass as it runs! Here
1073 // we fill in the AnalysisImpls member of the pass so that it can
1074 // successfully use the getAnalysis() method to retrieve the
1075 // implementations it needs.
1077 void PMDataManager::initializeAnalysisImpl(Pass *P) {
1078 AnalysisUsage *AnUsage = TPM->findAnalysisUsage(P);
1080 for (AnalysisUsage::VectorType::const_iterator
1081 I = AnUsage->getRequiredSet().begin(),
1082 E = AnUsage->getRequiredSet().end(); I != E; ++I) {
1083 Pass *Impl = findAnalysisPass(*I, true);
1085 // This may be analysis pass that is initialized on the fly.
1086 // If that is not the case then it will raise an assert when it is used.
1088 AnalysisResolver *AR = P->getResolver();
1089 assert(AR && "Analysis Resolver is not set");
1090 AR->addAnalysisImplsPair(*I, Impl);
1094 /// Find the pass that implements Analysis AID. If desired pass is not found
1095 /// then return NULL.
1096 Pass *PMDataManager::findAnalysisPass(AnalysisID AID, bool SearchParent) {
1098 // Check if AvailableAnalysis map has one entry.
1099 std::map<AnalysisID, Pass*>::const_iterator I = AvailableAnalysis.find(AID);
1101 if (I != AvailableAnalysis.end())
1104 // Search Parents through TopLevelManager
1106 return TPM->findAnalysisPass(AID);
1111 // Print list of passes that are last used by P.
1112 void PMDataManager::dumpLastUses(Pass *P, unsigned Offset) const{
1114 SmallVector<Pass *, 12> LUses;
1116 // If this is a on the fly manager then it does not have TPM.
1120 TPM->collectLastUses(LUses, P);
1122 for (SmallVectorImpl<Pass *>::iterator I = LUses.begin(),
1123 E = LUses.end(); I != E; ++I) {
1124 llvm::dbgs() << "--" << std::string(Offset*2, ' ');
1125 (*I)->dumpPassStructure(0);
1129 void PMDataManager::dumpPassArguments() const {
1130 for (SmallVectorImpl<Pass *>::const_iterator I = PassVector.begin(),
1131 E = PassVector.end(); I != E; ++I) {
1132 if (PMDataManager *PMD = (*I)->getAsPMDataManager())
1133 PMD->dumpPassArguments();
1135 if (const PassInfo *PI =
1136 PassRegistry::getPassRegistry()->getPassInfo((*I)->getPassID()))
1137 if (!PI->isAnalysisGroup())
1138 dbgs() << " -" << PI->getPassArgument();
1142 void PMDataManager::dumpPassInfo(Pass *P, enum PassDebuggingString S1,
1143 enum PassDebuggingString S2,
1145 if (PassDebugging < Executions)
1147 dbgs() << (void*)this << std::string(getDepth()*2+1, ' ');
1150 dbgs() << "Executing Pass '" << P->getPassName();
1152 case MODIFICATION_MSG:
1153 dbgs() << "Made Modification '" << P->getPassName();
1156 dbgs() << " Freeing Pass '" << P->getPassName();
1162 case ON_BASICBLOCK_MSG:
1163 dbgs() << "' on BasicBlock '" << Msg << "'...\n";
1165 case ON_FUNCTION_MSG:
1166 dbgs() << "' on Function '" << Msg << "'...\n";
1169 dbgs() << "' on Module '" << Msg << "'...\n";
1172 dbgs() << "' on Region '" << Msg << "'...\n";
1175 dbgs() << "' on Loop '" << Msg << "'...\n";
1178 dbgs() << "' on Call Graph Nodes '" << Msg << "'...\n";
1185 void PMDataManager::dumpRequiredSet(const Pass *P) const {
1186 if (PassDebugging < Details)
1189 AnalysisUsage analysisUsage;
1190 P->getAnalysisUsage(analysisUsage);
1191 dumpAnalysisUsage("Required", P, analysisUsage.getRequiredSet());
1194 void PMDataManager::dumpPreservedSet(const Pass *P) const {
1195 if (PassDebugging < Details)
1198 AnalysisUsage analysisUsage;
1199 P->getAnalysisUsage(analysisUsage);
1200 dumpAnalysisUsage("Preserved", P, analysisUsage.getPreservedSet());
1203 void PMDataManager::dumpAnalysisUsage(StringRef Msg, const Pass *P,
1204 const AnalysisUsage::VectorType &Set) const {
1205 assert(PassDebugging >= Details);
1208 dbgs() << (const void*)P << std::string(getDepth()*2+3, ' ') << Msg << " Analyses:";
1209 for (unsigned i = 0; i != Set.size(); ++i) {
1210 if (i) dbgs() << ',';
1211 const PassInfo *PInf = PassRegistry::getPassRegistry()->getPassInfo(Set[i]);
1213 // Some preserved passes, such as AliasAnalysis, may not be initialized by
1215 dbgs() << " Uninitialized Pass";
1218 dbgs() << ' ' << PInf->getPassName();
1223 /// Add RequiredPass into list of lower level passes required by pass P.
1224 /// RequiredPass is run on the fly by Pass Manager when P requests it
1225 /// through getAnalysis interface.
1226 /// This should be handled by specific pass manager.
1227 void PMDataManager::addLowerLevelRequiredPass(Pass *P, Pass *RequiredPass) {
1229 TPM->dumpArguments();
1233 // Module Level pass may required Function Level analysis info
1234 // (e.g. dominator info). Pass manager uses on the fly function pass manager
1235 // to provide this on demand. In that case, in Pass manager terminology,
1236 // module level pass is requiring lower level analysis info managed by
1237 // lower level pass manager.
1239 // When Pass manager is not able to order required analysis info, Pass manager
1240 // checks whether any lower level manager will be able to provide this
1241 // analysis info on demand or not.
1243 dbgs() << "Unable to schedule '" << RequiredPass->getPassName();
1244 dbgs() << "' required by '" << P->getPassName() << "'\n";
1246 llvm_unreachable("Unable to schedule pass");
1249 Pass *PMDataManager::getOnTheFlyPass(Pass *P, AnalysisID PI, Function &F) {
1250 llvm_unreachable("Unable to find on the fly pass");
1254 PMDataManager::~PMDataManager() {
1255 for (SmallVectorImpl<Pass *>::iterator I = PassVector.begin(),
1256 E = PassVector.end(); I != E; ++I)
1260 //===----------------------------------------------------------------------===//
1261 // NOTE: Is this the right place to define this method ?
1262 // getAnalysisIfAvailable - Return analysis result or null if it doesn't exist.
1263 Pass *AnalysisResolver::getAnalysisIfAvailable(AnalysisID ID, bool dir) const {
1264 return PM.findAnalysisPass(ID, dir);
1267 Pass *AnalysisResolver::findImplPass(Pass *P, AnalysisID AnalysisPI,
1269 return PM.getOnTheFlyPass(P, AnalysisPI, F);
1272 //===----------------------------------------------------------------------===//
1273 // BBPassManager implementation
1275 /// Execute all of the passes scheduled for execution by invoking
1276 /// runOnBasicBlock method. Keep track of whether any of the passes modifies
1277 /// the function, and if so, return true.
1278 bool BBPassManager::runOnFunction(Function &F) {
1279 if (F.isDeclaration())
1282 bool Changed = doInitialization(F);
1284 for (Function::iterator I = F.begin(), E = F.end(); I != E; ++I)
1285 for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
1286 BasicBlockPass *BP = getContainedPass(Index);
1287 bool LocalChanged = false;
1289 dumpPassInfo(BP, EXECUTION_MSG, ON_BASICBLOCK_MSG, I->getName());
1290 dumpRequiredSet(BP);
1292 initializeAnalysisImpl(BP);
1295 // If the pass crashes, remember this.
1296 PassManagerPrettyStackEntry X(BP, *I);
1297 TimeRegion PassTimer(getPassTimer(BP));
1299 LocalChanged |= BP->runOnBasicBlock(*I);
1302 Changed |= LocalChanged;
1304 dumpPassInfo(BP, MODIFICATION_MSG, ON_BASICBLOCK_MSG,
1306 dumpPreservedSet(BP);
1308 verifyPreservedAnalysis(BP);
1309 removeNotPreservedAnalysis(BP);
1310 recordAvailableAnalysis(BP);
1311 removeDeadPasses(BP, I->getName(), ON_BASICBLOCK_MSG);
1314 return doFinalization(F) || Changed;
1317 // Implement doInitialization and doFinalization
1318 bool BBPassManager::doInitialization(Module &M) {
1319 bool Changed = false;
1321 for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index)
1322 Changed |= getContainedPass(Index)->doInitialization(M);
1327 bool BBPassManager::doFinalization(Module &M) {
1328 bool Changed = false;
1330 for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index)
1331 Changed |= getContainedPass(Index)->doFinalization(M);
1336 bool BBPassManager::doInitialization(Function &F) {
1337 bool Changed = false;
1339 for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
1340 BasicBlockPass *BP = getContainedPass(Index);
1341 Changed |= BP->doInitialization(F);
1347 bool BBPassManager::doFinalization(Function &F) {
1348 bool Changed = false;
1350 for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
1351 BasicBlockPass *BP = getContainedPass(Index);
1352 Changed |= BP->doFinalization(F);
1359 //===----------------------------------------------------------------------===//
1360 // FunctionPassManager implementation
1362 /// Create new Function pass manager
1363 FunctionPassManager::FunctionPassManager(Module *m) : M(m) {
1364 FPM = new FunctionPassManagerImpl();
1365 // FPM is the top level manager.
1366 FPM->setTopLevelManager(FPM);
1368 AnalysisResolver *AR = new AnalysisResolver(*FPM);
1369 FPM->setResolver(AR);
1372 FunctionPassManager::~FunctionPassManager() {
1376 /// add - Add a pass to the queue of passes to run. This passes
1377 /// ownership of the Pass to the PassManager. When the
1378 /// PassManager_X is destroyed, the pass will be destroyed as well, so
1379 /// there is no need to delete the pass. (TODO delete passes.)
1380 /// This implies that all passes MUST be allocated with 'new'.
1381 void FunctionPassManager::add(Pass *P) {
1385 /// run - Execute all of the passes scheduled for execution. Keep
1386 /// track of whether any of the passes modifies the function, and if
1387 /// so, return true.
1389 bool FunctionPassManager::run(Function &F) {
1390 if (F.isMaterializable()) {
1392 if (F.Materialize(&errstr))
1393 report_fatal_error("Error reading bitcode file: " + Twine(errstr));
1399 /// doInitialization - Run all of the initializers for the function passes.
1401 bool FunctionPassManager::doInitialization() {
1402 return FPM->doInitialization(*M);
1405 /// doFinalization - Run all of the finalizers for the function passes.
1407 bool FunctionPassManager::doFinalization() {
1408 return FPM->doFinalization(*M);
1411 //===----------------------------------------------------------------------===//
1412 // FunctionPassManagerImpl implementation
1414 bool FunctionPassManagerImpl::doInitialization(Module &M) {
1415 bool Changed = false;
1420 for (unsigned Index = 0; Index < getNumContainedManagers(); ++Index)
1421 Changed |= getContainedManager(Index)->doInitialization(M);
1426 bool FunctionPassManagerImpl::doFinalization(Module &M) {
1427 bool Changed = false;
1429 for (unsigned Index = 0; Index < getNumContainedManagers(); ++Index)
1430 Changed |= getContainedManager(Index)->doFinalization(M);
1435 /// cleanup - After running all passes, clean up pass manager cache.
1436 void FPPassManager::cleanup() {
1437 for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
1438 FunctionPass *FP = getContainedPass(Index);
1439 AnalysisResolver *AR = FP->getResolver();
1440 assert(AR && "Analysis Resolver is not set");
1441 AR->clearAnalysisImpls();
1445 void FunctionPassManagerImpl::releaseMemoryOnTheFly() {
1448 for (unsigned Index = 0; Index < getNumContainedManagers(); ++Index) {
1449 FPPassManager *FPPM = getContainedManager(Index);
1450 for (unsigned Index = 0; Index < FPPM->getNumContainedPasses(); ++Index) {
1451 FPPM->getContainedPass(Index)->releaseMemory();
1457 // Execute all the passes managed by this top level manager.
1458 // Return true if any function is modified by a pass.
1459 bool FunctionPassManagerImpl::run(Function &F) {
1460 bool Changed = false;
1461 TimingInfo::createTheTimeInfo();
1463 initializeAllAnalysisInfo();
1464 for (unsigned Index = 0; Index < getNumContainedManagers(); ++Index)
1465 Changed |= getContainedManager(Index)->runOnFunction(F);
1467 for (unsigned Index = 0; Index < getNumContainedManagers(); ++Index)
1468 getContainedManager(Index)->cleanup();
1474 //===----------------------------------------------------------------------===//
1475 // FPPassManager implementation
1477 char FPPassManager::ID = 0;
1478 /// Print passes managed by this manager
1479 void FPPassManager::dumpPassStructure(unsigned Offset) {
1480 dbgs().indent(Offset*2) << "FunctionPass Manager\n";
1481 for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
1482 FunctionPass *FP = getContainedPass(Index);
1483 FP->dumpPassStructure(Offset + 1);
1484 dumpLastUses(FP, Offset+1);
1489 /// Execute all of the passes scheduled for execution by invoking
1490 /// runOnFunction method. Keep track of whether any of the passes modifies
1491 /// the function, and if so, return true.
1492 bool FPPassManager::runOnFunction(Function &F) {
1493 if (F.isDeclaration())
1496 bool Changed = false;
1498 // Collect inherited analysis from Module level pass manager.
1499 populateInheritedAnalysis(TPM->activeStack);
1501 for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
1502 FunctionPass *FP = getContainedPass(Index);
1503 bool LocalChanged = false;
1505 dumpPassInfo(FP, EXECUTION_MSG, ON_FUNCTION_MSG, F.getName());
1506 dumpRequiredSet(FP);
1508 initializeAnalysisImpl(FP);
1511 PassManagerPrettyStackEntry X(FP, F);
1512 TimeRegion PassTimer(getPassTimer(FP));
1514 LocalChanged |= FP->runOnFunction(F);
1517 Changed |= LocalChanged;
1519 dumpPassInfo(FP, MODIFICATION_MSG, ON_FUNCTION_MSG, F.getName());
1520 dumpPreservedSet(FP);
1522 verifyPreservedAnalysis(FP);
1523 removeNotPreservedAnalysis(FP);
1524 recordAvailableAnalysis(FP);
1525 removeDeadPasses(FP, F.getName(), ON_FUNCTION_MSG);
1530 bool FPPassManager::runOnModule(Module &M) {
1531 bool Changed = doInitialization(M);
1533 for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
1534 Changed |= runOnFunction(*I);
1536 return doFinalization(M) || Changed;
1539 bool FPPassManager::doInitialization(Module &M) {
1540 bool Changed = false;
1542 for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index)
1543 Changed |= getContainedPass(Index)->doInitialization(M);
1548 bool FPPassManager::doFinalization(Module &M) {
1549 bool Changed = false;
1551 for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index)
1552 Changed |= getContainedPass(Index)->doFinalization(M);
1557 //===----------------------------------------------------------------------===//
1558 // MPPassManager implementation
1560 /// Execute all of the passes scheduled for execution by invoking
1561 /// runOnModule method. Keep track of whether any of the passes modifies
1562 /// the module, and if so, return true.
1564 MPPassManager::runOnModule(Module &M) {
1565 bool Changed = false;
1567 // Initialize on-the-fly passes
1568 for (std::map<Pass *, FunctionPassManagerImpl *>::iterator
1569 I = OnTheFlyManagers.begin(), E = OnTheFlyManagers.end();
1571 FunctionPassManagerImpl *FPP = I->second;
1572 Changed |= FPP->doInitialization(M);
1575 for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
1576 ModulePass *MP = getContainedPass(Index);
1577 bool LocalChanged = false;
1579 dumpPassInfo(MP, EXECUTION_MSG, ON_MODULE_MSG, M.getModuleIdentifier());
1580 dumpRequiredSet(MP);
1582 initializeAnalysisImpl(MP);
1585 PassManagerPrettyStackEntry X(MP, M);
1586 TimeRegion PassTimer(getPassTimer(MP));
1588 LocalChanged |= MP->runOnModule(M);
1591 Changed |= LocalChanged;
1593 dumpPassInfo(MP, MODIFICATION_MSG, ON_MODULE_MSG,
1594 M.getModuleIdentifier());
1595 dumpPreservedSet(MP);
1597 verifyPreservedAnalysis(MP);
1598 removeNotPreservedAnalysis(MP);
1599 recordAvailableAnalysis(MP);
1600 removeDeadPasses(MP, M.getModuleIdentifier(), ON_MODULE_MSG);
1603 // Finalize on-the-fly passes
1604 for (std::map<Pass *, FunctionPassManagerImpl *>::iterator
1605 I = OnTheFlyManagers.begin(), E = OnTheFlyManagers.end();
1607 FunctionPassManagerImpl *FPP = I->second;
1608 // We don't know when is the last time an on-the-fly pass is run,
1609 // so we need to releaseMemory / finalize here
1610 FPP->releaseMemoryOnTheFly();
1611 Changed |= FPP->doFinalization(M);
1617 /// Run all of the initializers for the module passes.
1619 bool MPPassManager::doInitialization(void) {
1620 bool Changed = false;
1622 for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index)
1623 Changed |= getContainedPass(Index)->doInitialization();
1628 /// Run all of the finalizers for the module passes.
1630 bool MPPassManager::doFinalization(void) {
1631 bool Changed = false;
1633 for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index)
1634 Changed |= getContainedPass(Index)->doFinalization();
1639 /// Add RequiredPass into list of lower level passes required by pass P.
1640 /// RequiredPass is run on the fly by Pass Manager when P requests it
1641 /// through getAnalysis interface.
1642 void MPPassManager::addLowerLevelRequiredPass(Pass *P, Pass *RequiredPass) {
1643 assert(P->getPotentialPassManagerType() == PMT_ModulePassManager &&
1644 "Unable to handle Pass that requires lower level Analysis pass");
1645 assert((P->getPotentialPassManagerType() <
1646 RequiredPass->getPotentialPassManagerType()) &&
1647 "Unable to handle Pass that requires lower level Analysis pass");
1649 FunctionPassManagerImpl *FPP = OnTheFlyManagers[P];
1651 FPP = new FunctionPassManagerImpl();
1652 // FPP is the top level manager.
1653 FPP->setTopLevelManager(FPP);
1655 OnTheFlyManagers[P] = FPP;
1657 FPP->add(RequiredPass);
1659 // Register P as the last user of RequiredPass.
1661 SmallVector<Pass *, 1> LU;
1662 LU.push_back(RequiredPass);
1663 FPP->setLastUser(LU, P);
1667 /// Return function pass corresponding to PassInfo PI, that is
1668 /// required by module pass MP. Instantiate analysis pass, by using
1669 /// its runOnFunction() for function F.
1670 Pass* MPPassManager::getOnTheFlyPass(Pass *MP, AnalysisID PI, Function &F){
1671 FunctionPassManagerImpl *FPP = OnTheFlyManagers[MP];
1672 assert(FPP && "Unable to find on the fly pass");
1674 FPP->releaseMemoryOnTheFly();
1676 return ((PMTopLevelManager*)FPP)->findAnalysisPass(PI);
1680 //===----------------------------------------------------------------------===//
1681 // PassManagerImpl implementation
1683 bool PassManagerImpl::doInitialization(void) {
1684 bool Changed = false;
1686 for (unsigned Index = 0; Index < getNumContainedManagers(); ++Index)
1687 Changed |= getContainedManager(Index)->doInitialization();
1692 bool PassManagerImpl::doFinalization(void) {
1693 bool Changed = false;
1695 for (unsigned Index = 0; Index < getNumContainedManagers(); ++Index)
1696 Changed |= getContainedManager(Index)->doFinalization();
1702 /// run - Execute all of the passes scheduled for execution. Keep track of
1703 /// whether any of the passes modifies the module, and if so, return true.
1704 bool PassManagerImpl::run(Module &M) {
1705 bool Changed = false;
1706 TimingInfo::createTheTimeInfo();
1711 initializeAllAnalysisInfo();
1712 for (unsigned Index = 0; Index < getNumContainedManagers(); ++Index)
1713 Changed |= getContainedManager(Index)->runOnModule(M);
1717 //===----------------------------------------------------------------------===//
1718 // PassManager implementation
1720 /// Create new pass manager
1721 PassManager::PassManager() {
1722 PM = new PassManagerImpl();
1723 // PM is the top level manager
1724 PM->setTopLevelManager(PM);
1727 PassManager::~PassManager() {
1731 /// add - Add a pass to the queue of passes to run. This passes ownership of
1732 /// the Pass to the PassManager. When the PassManager is destroyed, the pass
1733 /// will be destroyed as well, so there is no need to delete the pass. This
1734 /// implies that all passes MUST be allocated with 'new'.
1735 void PassManager::add(Pass *P) {
1739 /// run - Execute all of the passes scheduled for execution. Keep track of
1740 /// whether any of the passes modifies the module, and if so, return true.
1741 bool PassManager::run(Module &M) {
1745 /// doInitialization - Run all of the initializers for the module passes.
1747 bool PassManager::doInitialization() {
1748 return PM->doInitialization();
1751 /// doFinalization - Run all of the finalizers for the module passes.
1753 bool PassManager::doFinalization() {
1754 return PM->doFinalization();
1757 //===----------------------------------------------------------------------===//
1758 // TimingInfo Class - This class is used to calculate information about the
1759 // amount of time each pass takes to execute. This only happens with
1760 // -time-passes is enabled on the command line.
1762 bool llvm::TimePassesIsEnabled = false;
1763 static cl::opt<bool,true>
1764 EnableTiming("time-passes", cl::location(TimePassesIsEnabled),
1765 cl::desc("Time each pass, printing elapsed time for each on exit"));
1767 // createTheTimeInfo - This method either initializes the TheTimeInfo pointer to
1768 // a non null value (if the -time-passes option is enabled) or it leaves it
1769 // null. It may be called multiple times.
1770 void TimingInfo::createTheTimeInfo() {
1771 if (!TimePassesIsEnabled || TheTimeInfo) return;
1773 // Constructed the first time this is called, iff -time-passes is enabled.
1774 // This guarantees that the object will be constructed before static globals,
1775 // thus it will be destroyed before them.
1776 static ManagedStatic<TimingInfo> TTI;
1777 TheTimeInfo = &*TTI;
1780 /// If TimingInfo is enabled then start pass timer.
1781 Timer *llvm::getPassTimer(Pass *P) {
1783 return TheTimeInfo->getPassTimer(P);
1787 //===----------------------------------------------------------------------===//
1788 // PMStack implementation
1791 // Pop Pass Manager from the stack and clear its analysis info.
1792 void PMStack::pop() {
1794 PMDataManager *Top = this->top();
1795 Top->initializeAnalysisInfo();
1800 // Push PM on the stack and set its top level manager.
1801 void PMStack::push(PMDataManager *PM) {
1802 assert(PM && "Unable to push. Pass Manager expected");
1803 assert(PM->getDepth()==0 && "Pass Manager depth set too early");
1805 if (!this->empty()) {
1806 assert(PM->getPassManagerType() > this->top()->getPassManagerType()
1807 && "pushing bad pass manager to PMStack");
1808 PMTopLevelManager *TPM = this->top()->getTopLevelManager();
1810 assert(TPM && "Unable to find top level manager");
1811 TPM->addIndirectPassManager(PM);
1812 PM->setTopLevelManager(TPM);
1813 PM->setDepth(this->top()->getDepth()+1);
1816 assert((PM->getPassManagerType() == PMT_ModulePassManager
1817 || PM->getPassManagerType() == PMT_FunctionPassManager)
1818 && "pushing bad pass manager to PMStack");
1825 // Dump content of the pass manager stack.
1826 void PMStack::dump() const {
1827 for (std::vector<PMDataManager *>::const_iterator I = S.begin(),
1828 E = S.end(); I != E; ++I)
1829 dbgs() << (*I)->getAsPass()->getPassName() << ' ';
1835 /// Find appropriate Module Pass Manager in the PM Stack and
1836 /// add self into that manager.
1837 void ModulePass::assignPassManager(PMStack &PMS,
1838 PassManagerType PreferredType) {
1839 // Find Module Pass Manager
1840 while (!PMS.empty()) {
1841 PassManagerType TopPMType = PMS.top()->getPassManagerType();
1842 if (TopPMType == PreferredType)
1843 break; // We found desired pass manager
1844 else if (TopPMType > PMT_ModulePassManager)
1845 PMS.pop(); // Pop children pass managers
1849 assert(!PMS.empty() && "Unable to find appropriate Pass Manager");
1850 PMS.top()->add(this);
1853 /// Find appropriate Function Pass Manager or Call Graph Pass Manager
1854 /// in the PM Stack and add self into that manager.
1855 void FunctionPass::assignPassManager(PMStack &PMS,
1856 PassManagerType PreferredType) {
1858 // Find Function Pass Manager
1859 while (!PMS.empty()) {
1860 if (PMS.top()->getPassManagerType() > PMT_FunctionPassManager)
1866 // Create new Function Pass Manager if needed.
1868 if (PMS.top()->getPassManagerType() == PMT_FunctionPassManager) {
1869 FPP = (FPPassManager *)PMS.top();
1871 assert(!PMS.empty() && "Unable to create Function Pass Manager");
1872 PMDataManager *PMD = PMS.top();
1874 // [1] Create new Function Pass Manager
1875 FPP = new FPPassManager();
1876 FPP->populateInheritedAnalysis(PMS);
1878 // [2] Set up new manager's top level manager
1879 PMTopLevelManager *TPM = PMD->getTopLevelManager();
1880 TPM->addIndirectPassManager(FPP);
1882 // [3] Assign manager to manage this new manager. This may create
1883 // and push new managers into PMS
1884 FPP->assignPassManager(PMS, PMD->getPassManagerType());
1886 // [4] Push new manager into PMS
1890 // Assign FPP as the manager of this pass.
1894 /// Find appropriate Basic Pass Manager or Call Graph Pass Manager
1895 /// in the PM Stack and add self into that manager.
1896 void BasicBlockPass::assignPassManager(PMStack &PMS,
1897 PassManagerType PreferredType) {
1900 // Basic Pass Manager is a leaf pass manager. It does not handle
1901 // any other pass manager.
1903 PMS.top()->getPassManagerType() == PMT_BasicBlockPassManager) {
1904 BBP = (BBPassManager *)PMS.top();
1906 // If leaf manager is not Basic Block Pass manager then create new
1907 // basic Block Pass manager.
1908 assert(!PMS.empty() && "Unable to create BasicBlock Pass Manager");
1909 PMDataManager *PMD = PMS.top();
1911 // [1] Create new Basic Block Manager
1912 BBP = new BBPassManager();
1914 // [2] Set up new manager's top level manager
1915 // Basic Block Pass Manager does not live by itself
1916 PMTopLevelManager *TPM = PMD->getTopLevelManager();
1917 TPM->addIndirectPassManager(BBP);
1919 // [3] Assign manager to manage this new manager. This may create
1920 // and push new managers into PMS
1921 BBP->assignPassManager(PMS, PreferredType);
1923 // [4] Push new manager into PMS
1927 // Assign BBP as the manager of this pass.
1931 PassManagerBase::~PassManagerBase() {}