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/Assembly/Writer.h"
17 #include "llvm/Support/CommandLine.h"
18 #include "llvm/Support/Debug.h"
19 #include "llvm/Support/Timer.h"
20 #include "llvm/Module.h"
21 #include "llvm/Support/ErrorHandling.h"
22 #include "llvm/Support/ManagedStatic.h"
23 #include "llvm/Support/raw_ostream.h"
24 #include "llvm/System/Mutex.h"
25 #include "llvm/System/Threading.h"
26 #include "llvm-c/Core.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"),
58 } // End of llvm namespace
60 /// isPassDebuggingExecutionsOrMore - Return true if -debug-pass=Executions
61 /// or higher is specified.
62 bool PMDataManager::isPassDebuggingExecutionsOrMore() const {
63 return PassDebugging >= Executions;
69 void PassManagerPrettyStackEntry::print(raw_ostream &OS) const {
71 OS << "Releasing pass '";
73 OS << "Running pass '";
75 OS << P->getPassName() << "'";
78 OS << " on module '" << M->getModuleIdentifier() << "'.\n";
89 else if (isa<BasicBlock>(V))
95 WriteAsOperand(OS, V, /*PrintTy=*/false, M);
102 //===----------------------------------------------------------------------===//
105 /// BBPassManager manages BasicBlockPass. It batches all the
106 /// pass together and sequence them to process one basic block before
107 /// processing next basic block.
108 class BBPassManager : public PMDataManager, public FunctionPass {
112 explicit BBPassManager(int Depth)
113 : PMDataManager(Depth), FunctionPass(&ID) {}
115 /// Execute all of the passes scheduled for execution. Keep track of
116 /// whether any of the passes modifies the function, and if so, return true.
117 bool runOnFunction(Function &F);
119 /// Pass Manager itself does not invalidate any analysis info.
120 void getAnalysisUsage(AnalysisUsage &Info) const {
121 Info.setPreservesAll();
124 bool doInitialization(Module &M);
125 bool doInitialization(Function &F);
126 bool doFinalization(Module &M);
127 bool doFinalization(Function &F);
129 virtual PMDataManager *getAsPMDataManager() { return this; }
130 virtual Pass *getAsPass() { return this; }
132 virtual const char *getPassName() const {
133 return "BasicBlock Pass Manager";
136 // Print passes managed by this manager
137 void dumpPassStructure(unsigned Offset) {
138 llvm::dbgs() << std::string(Offset*2, ' ') << "BasicBlockPass Manager\n";
139 for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
140 BasicBlockPass *BP = getContainedPass(Index);
141 BP->dumpPassStructure(Offset + 1);
142 dumpLastUses(BP, Offset+1);
146 BasicBlockPass *getContainedPass(unsigned N) {
147 assert(N < PassVector.size() && "Pass number out of range!");
148 BasicBlockPass *BP = static_cast<BasicBlockPass *>(PassVector[N]);
152 virtual PassManagerType getPassManagerType() const {
153 return PMT_BasicBlockPassManager;
157 char BBPassManager::ID = 0;
162 //===----------------------------------------------------------------------===//
163 // FunctionPassManagerImpl
165 /// FunctionPassManagerImpl manages FPPassManagers
166 class FunctionPassManagerImpl : public Pass,
167 public PMDataManager,
168 public PMTopLevelManager {
173 explicit FunctionPassManagerImpl(int Depth) :
174 Pass(PT_PassManager, &ID), PMDataManager(Depth),
175 PMTopLevelManager(TLM_Function), wasRun(false) { }
177 /// add - Add a pass to the queue of passes to run. This passes ownership of
178 /// the Pass to the PassManager. When the PassManager is destroyed, the pass
179 /// will be destroyed as well, so there is no need to delete the pass. This
180 /// implies that all passes MUST be allocated with 'new'.
185 // Prepare for running an on the fly pass, freeing memory if needed
186 // from a previous run.
187 void releaseMemoryOnTheFly();
189 /// run - Execute all of the passes scheduled for execution. Keep track of
190 /// whether any of the passes modifies the module, and if so, return true.
191 bool run(Function &F);
193 /// doInitialization - Run all of the initializers for the function passes.
195 bool doInitialization(Module &M);
197 /// doFinalization - Run all of the finalizers for the function passes.
199 bool doFinalization(Module &M);
202 virtual PMDataManager *getAsPMDataManager() { return this; }
203 virtual Pass *getAsPass() { return this; }
205 /// Pass Manager itself does not invalidate any analysis info.
206 void getAnalysisUsage(AnalysisUsage &Info) const {
207 Info.setPreservesAll();
210 inline void addTopLevelPass(Pass *P) {
211 if (ImmutablePass *IP = P->getAsImmutablePass()) {
212 // P is a immutable pass and it will be managed by this
213 // top level manager. Set up analysis resolver to connect them.
214 AnalysisResolver *AR = new AnalysisResolver(*this);
216 initializeAnalysisImpl(P);
217 addImmutablePass(IP);
218 recordAvailableAnalysis(IP);
220 P->assignPassManager(activeStack);
225 FPPassManager *getContainedManager(unsigned N) {
226 assert(N < PassManagers.size() && "Pass number out of range!");
227 FPPassManager *FP = static_cast<FPPassManager *>(PassManagers[N]);
232 char FunctionPassManagerImpl::ID = 0;
233 //===----------------------------------------------------------------------===//
236 /// MPPassManager manages ModulePasses and function pass managers.
237 /// It batches all Module passes and function pass managers together and
238 /// sequences them to process one module.
239 class MPPassManager : public Pass, public PMDataManager {
242 explicit MPPassManager(int Depth) :
243 Pass(PT_PassManager, &ID), PMDataManager(Depth) { }
245 // Delete on the fly managers.
246 virtual ~MPPassManager() {
247 for (std::map<Pass *, FunctionPassManagerImpl *>::iterator
248 I = OnTheFlyManagers.begin(), E = OnTheFlyManagers.end();
250 FunctionPassManagerImpl *FPP = I->second;
255 /// run - Execute all of the passes scheduled for execution. Keep track of
256 /// whether any of the passes modifies the module, and if so, return true.
257 bool runOnModule(Module &M);
259 /// Pass Manager itself does not invalidate any analysis info.
260 void getAnalysisUsage(AnalysisUsage &Info) const {
261 Info.setPreservesAll();
264 /// Add RequiredPass into list of lower level passes required by pass P.
265 /// RequiredPass is run on the fly by Pass Manager when P requests it
266 /// through getAnalysis interface.
267 virtual void addLowerLevelRequiredPass(Pass *P, Pass *RequiredPass);
269 /// Return function pass corresponding to PassInfo PI, that is
270 /// required by module pass MP. Instantiate analysis pass, by using
271 /// its runOnFunction() for function F.
272 virtual Pass* getOnTheFlyPass(Pass *MP, const PassInfo *PI, Function &F);
274 virtual const char *getPassName() const {
275 return "Module Pass Manager";
278 virtual PMDataManager *getAsPMDataManager() { return this; }
279 virtual Pass *getAsPass() { return this; }
281 // Print passes managed by this manager
282 void dumpPassStructure(unsigned Offset) {
283 llvm::dbgs() << std::string(Offset*2, ' ') << "ModulePass Manager\n";
284 for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
285 ModulePass *MP = getContainedPass(Index);
286 MP->dumpPassStructure(Offset + 1);
287 std::map<Pass *, FunctionPassManagerImpl *>::const_iterator I =
288 OnTheFlyManagers.find(MP);
289 if (I != OnTheFlyManagers.end())
290 I->second->dumpPassStructure(Offset + 2);
291 dumpLastUses(MP, Offset+1);
295 ModulePass *getContainedPass(unsigned N) {
296 assert(N < PassVector.size() && "Pass number out of range!");
297 return static_cast<ModulePass *>(PassVector[N]);
300 virtual PassManagerType getPassManagerType() const {
301 return PMT_ModulePassManager;
305 /// Collection of on the fly FPPassManagers. These managers manage
306 /// function passes that are required by module passes.
307 std::map<Pass *, FunctionPassManagerImpl *> OnTheFlyManagers;
310 char MPPassManager::ID = 0;
311 //===----------------------------------------------------------------------===//
315 /// PassManagerImpl manages MPPassManagers
316 class PassManagerImpl : public Pass,
317 public PMDataManager,
318 public PMTopLevelManager {
322 explicit PassManagerImpl(int Depth) :
323 Pass(PT_PassManager, &ID), PMDataManager(Depth),
324 PMTopLevelManager(TLM_Pass) { }
326 /// add - Add a pass to the queue of passes to run. This passes ownership of
327 /// the Pass to the PassManager. When the PassManager is destroyed, the pass
328 /// will be destroyed as well, so there is no need to delete the pass. This
329 /// implies that all passes MUST be allocated with 'new'.
334 /// run - Execute all of the passes scheduled for execution. Keep track of
335 /// whether any of the passes modifies the module, and if so, return true.
338 /// Pass Manager itself does not invalidate any analysis info.
339 void getAnalysisUsage(AnalysisUsage &Info) const {
340 Info.setPreservesAll();
343 inline void addTopLevelPass(Pass *P) {
344 if (ImmutablePass *IP = P->getAsImmutablePass()) {
345 // P is a immutable pass and it will be managed by this
346 // top level manager. Set up analysis resolver to connect them.
347 AnalysisResolver *AR = new AnalysisResolver(*this);
349 initializeAnalysisImpl(P);
350 addImmutablePass(IP);
351 recordAvailableAnalysis(IP);
353 P->assignPassManager(activeStack);
357 virtual PMDataManager *getAsPMDataManager() { return this; }
358 virtual Pass *getAsPass() { return this; }
360 MPPassManager *getContainedManager(unsigned N) {
361 assert(N < PassManagers.size() && "Pass number out of range!");
362 MPPassManager *MP = static_cast<MPPassManager *>(PassManagers[N]);
367 char PassManagerImpl::ID = 0;
368 } // End of llvm namespace
372 //===----------------------------------------------------------------------===//
373 /// TimingInfo Class - This class is used to calculate information about the
374 /// amount of time each pass takes to execute. This only happens when
375 /// -time-passes is enabled on the command line.
378 static ManagedStatic<sys::SmartMutex<true> > TimingInfoMutex;
381 std::map<Pass*, Timer> TimingData;
385 // Use 'create' member to get this.
386 TimingInfo() : TG("... Pass execution timing report ...") {}
388 // TimingDtor - Print out information about timing information
390 // Delete all of the timers...
392 // TimerGroup is deleted next, printing the report.
395 // createTheTimeInfo - This method either initializes the TheTimeInfo pointer
396 // to a non null value (if the -time-passes option is enabled) or it leaves it
397 // null. It may be called multiple times.
398 static void createTheTimeInfo();
400 /// passStarted - This method creates a timer for the given pass if it doesn't
401 /// already have one, and starts the timer.
402 Timer *passStarted(Pass *P) {
403 if (P->getAsPMDataManager())
406 sys::SmartScopedLock<true> Lock(*TimingInfoMutex);
407 std::map<Pass*, Timer>::iterator I = TimingData.find(P);
408 if (I == TimingData.end())
409 I=TimingData.insert(std::make_pair(P, Timer(P->getPassName(), TG))).first;
410 Timer *T = &I->second;
416 } // End of anon namespace
418 static TimingInfo *TheTimeInfo;
420 //===----------------------------------------------------------------------===//
421 // PMTopLevelManager implementation
423 /// Initialize top level manager. Create first pass manager.
424 PMTopLevelManager::PMTopLevelManager(enum TopLevelManagerType t) {
426 MPPassManager *MPP = new MPPassManager(1);
427 MPP->setTopLevelManager(this);
429 activeStack.push(MPP);
430 } else if (t == TLM_Function) {
431 FPPassManager *FPP = new FPPassManager(1);
432 FPP->setTopLevelManager(this);
434 activeStack.push(FPP);
438 /// Set pass P as the last user of the given analysis passes.
439 void PMTopLevelManager::setLastUser(SmallVector<Pass *, 12> &AnalysisPasses,
441 for (SmallVector<Pass *, 12>::iterator I = AnalysisPasses.begin(),
442 E = AnalysisPasses.end(); I != E; ++I) {
449 // If AP is the last user of other passes then make P last user of
451 for (DenseMap<Pass *, Pass *>::iterator LUI = LastUser.begin(),
452 LUE = LastUser.end(); LUI != LUE; ++LUI) {
453 if (LUI->second == AP)
454 // DenseMap iterator is not invalidated here because
455 // this is just updating exisitng entry.
456 LastUser[LUI->first] = P;
461 /// Collect passes whose last user is P
462 void PMTopLevelManager::collectLastUses(SmallVector<Pass *, 12> &LastUses,
464 DenseMap<Pass *, SmallPtrSet<Pass *, 8> >::iterator DMI =
465 InversedLastUser.find(P);
466 if (DMI == InversedLastUser.end())
469 SmallPtrSet<Pass *, 8> &LU = DMI->second;
470 for (SmallPtrSet<Pass *, 8>::iterator I = LU.begin(),
471 E = LU.end(); I != E; ++I) {
472 LastUses.push_back(*I);
477 AnalysisUsage *PMTopLevelManager::findAnalysisUsage(Pass *P) {
478 AnalysisUsage *AnUsage = NULL;
479 DenseMap<Pass *, AnalysisUsage *>::iterator DMI = AnUsageMap.find(P);
480 if (DMI != AnUsageMap.end())
481 AnUsage = DMI->second;
483 AnUsage = new AnalysisUsage();
484 P->getAnalysisUsage(*AnUsage);
485 AnUsageMap[P] = AnUsage;
490 /// Schedule pass P for execution. Make sure that passes required by
491 /// P are run before P is run. Update analysis info maintained by
492 /// the manager. Remove dead passes. This is a recursive function.
493 void PMTopLevelManager::schedulePass(Pass *P) {
495 // TODO : Allocate function manager for this pass, other wise required set
496 // may be inserted into previous function manager
498 // Give pass a chance to prepare the stage.
499 P->preparePassManager(activeStack);
501 // If P is an analysis pass and it is available then do not
502 // generate the analysis again. Stale analysis info should not be
503 // available at this point.
504 if (P->getPassInfo() &&
505 P->getPassInfo()->isAnalysis() && findAnalysisPass(P->getPassInfo())) {
510 AnalysisUsage *AnUsage = findAnalysisUsage(P);
512 bool checkAnalysis = true;
513 while (checkAnalysis) {
514 checkAnalysis = false;
516 const AnalysisUsage::VectorType &RequiredSet = AnUsage->getRequiredSet();
517 for (AnalysisUsage::VectorType::const_iterator I = RequiredSet.begin(),
518 E = RequiredSet.end(); I != E; ++I) {
520 Pass *AnalysisPass = findAnalysisPass(*I);
522 AnalysisPass = (*I)->createPass();
523 if (P->getPotentialPassManagerType () ==
524 AnalysisPass->getPotentialPassManagerType())
525 // Schedule analysis pass that is managed by the same pass manager.
526 schedulePass(AnalysisPass);
527 else if (P->getPotentialPassManagerType () >
528 AnalysisPass->getPotentialPassManagerType()) {
529 // Schedule analysis pass that is managed by a new manager.
530 schedulePass(AnalysisPass);
531 // Recheck analysis passes to ensure that required analysises that
532 // are already checked are still available.
533 checkAnalysis = true;
536 // Do not schedule this analysis. Lower level analsyis
537 // passes are run on the fly.
543 // Now all required passes are available.
547 /// Find the pass that implements Analysis AID. Search immutable
548 /// passes and all pass managers. If desired pass is not found
549 /// then return NULL.
550 Pass *PMTopLevelManager::findAnalysisPass(AnalysisID AID) {
553 // Check pass managers
554 for (SmallVector<PMDataManager *, 8>::iterator I = PassManagers.begin(),
555 E = PassManagers.end(); P == NULL && I != E; ++I) {
556 PMDataManager *PMD = *I;
557 P = PMD->findAnalysisPass(AID, false);
560 // Check other pass managers
561 for (SmallVector<PMDataManager *, 8>::iterator
562 I = IndirectPassManagers.begin(),
563 E = IndirectPassManagers.end(); P == NULL && I != E; ++I)
564 P = (*I)->findAnalysisPass(AID, false);
566 for (SmallVector<ImmutablePass *, 8>::iterator I = ImmutablePasses.begin(),
567 E = ImmutablePasses.end(); P == NULL && I != E; ++I) {
568 const PassInfo *PI = (*I)->getPassInfo();
572 // If Pass not found then check the interfaces implemented by Immutable Pass
574 const std::vector<const PassInfo*> &ImmPI =
575 PI->getInterfacesImplemented();
576 if (std::find(ImmPI.begin(), ImmPI.end(), AID) != ImmPI.end())
584 // Print passes managed by this top level manager.
585 void PMTopLevelManager::dumpPasses() const {
587 if (PassDebugging < Structure)
590 // Print out the immutable passes
591 for (unsigned i = 0, e = ImmutablePasses.size(); i != e; ++i) {
592 ImmutablePasses[i]->dumpPassStructure(0);
595 // Every class that derives from PMDataManager also derives from Pass
596 // (sometimes indirectly), but there's no inheritance relationship
597 // between PMDataManager and Pass, so we have to getAsPass to get
598 // from a PMDataManager* to a Pass*.
599 for (SmallVector<PMDataManager *, 8>::const_iterator I = PassManagers.begin(),
600 E = PassManagers.end(); I != E; ++I)
601 (*I)->getAsPass()->dumpPassStructure(1);
604 void PMTopLevelManager::dumpArguments() const {
606 if (PassDebugging < Arguments)
609 dbgs() << "Pass Arguments: ";
610 for (SmallVector<PMDataManager *, 8>::const_iterator I = PassManagers.begin(),
611 E = PassManagers.end(); I != E; ++I)
612 (*I)->dumpPassArguments();
616 void PMTopLevelManager::initializeAllAnalysisInfo() {
617 for (SmallVector<PMDataManager *, 8>::iterator I = PassManagers.begin(),
618 E = PassManagers.end(); I != E; ++I)
619 (*I)->initializeAnalysisInfo();
621 // Initailize other pass managers
622 for (SmallVector<PMDataManager *, 8>::iterator I = IndirectPassManagers.begin(),
623 E = IndirectPassManagers.end(); I != E; ++I)
624 (*I)->initializeAnalysisInfo();
626 for (DenseMap<Pass *, Pass *>::iterator DMI = LastUser.begin(),
627 DME = LastUser.end(); DMI != DME; ++DMI) {
628 DenseMap<Pass *, SmallPtrSet<Pass *, 8> >::iterator InvDMI =
629 InversedLastUser.find(DMI->second);
630 if (InvDMI != InversedLastUser.end()) {
631 SmallPtrSet<Pass *, 8> &L = InvDMI->second;
632 L.insert(DMI->first);
634 SmallPtrSet<Pass *, 8> L; L.insert(DMI->first);
635 InversedLastUser[DMI->second] = L;
641 PMTopLevelManager::~PMTopLevelManager() {
642 for (SmallVector<PMDataManager *, 8>::iterator I = PassManagers.begin(),
643 E = PassManagers.end(); I != E; ++I)
646 for (SmallVector<ImmutablePass *, 8>::iterator
647 I = ImmutablePasses.begin(), E = ImmutablePasses.end(); I != E; ++I)
650 for (DenseMap<Pass *, AnalysisUsage *>::iterator DMI = AnUsageMap.begin(),
651 DME = AnUsageMap.end(); DMI != DME; ++DMI)
655 //===----------------------------------------------------------------------===//
656 // PMDataManager implementation
658 /// Augement AvailableAnalysis by adding analysis made available by pass P.
659 void PMDataManager::recordAvailableAnalysis(Pass *P) {
660 const PassInfo *PI = P->getPassInfo();
663 AvailableAnalysis[PI] = P;
665 //This pass is the current implementation of all of the interfaces it
666 //implements as well.
667 const std::vector<const PassInfo*> &II = PI->getInterfacesImplemented();
668 for (unsigned i = 0, e = II.size(); i != e; ++i)
669 AvailableAnalysis[II[i]] = P;
672 // Return true if P preserves high level analysis used by other
673 // passes managed by this manager
674 bool PMDataManager::preserveHigherLevelAnalysis(Pass *P) {
675 AnalysisUsage *AnUsage = TPM->findAnalysisUsage(P);
676 if (AnUsage->getPreservesAll())
679 const AnalysisUsage::VectorType &PreservedSet = AnUsage->getPreservedSet();
680 for (SmallVector<Pass *, 8>::iterator I = HigherLevelAnalysis.begin(),
681 E = HigherLevelAnalysis.end(); I != E; ++I) {
683 if (P1->getAsImmutablePass() == 0 &&
684 std::find(PreservedSet.begin(), PreservedSet.end(),
685 P1->getPassInfo()) ==
693 /// verifyPreservedAnalysis -- Verify analysis preserved by pass P.
694 void PMDataManager::verifyPreservedAnalysis(Pass *P) {
695 // Don't do this unless assertions are enabled.
699 AnalysisUsage *AnUsage = TPM->findAnalysisUsage(P);
700 const AnalysisUsage::VectorType &PreservedSet = AnUsage->getPreservedSet();
702 // Verify preserved analysis
703 for (AnalysisUsage::VectorType::const_iterator I = PreservedSet.begin(),
704 E = PreservedSet.end(); I != E; ++I) {
706 if (Pass *AP = findAnalysisPass(AID, true)) {
709 if (TheTimeInfo) T = TheTimeInfo->passStarted(AP);
710 AP->verifyAnalysis();
711 if (T) T->stopTimer();
716 /// Remove Analysis not preserved by Pass P
717 void PMDataManager::removeNotPreservedAnalysis(Pass *P) {
718 AnalysisUsage *AnUsage = TPM->findAnalysisUsage(P);
719 if (AnUsage->getPreservesAll())
722 const AnalysisUsage::VectorType &PreservedSet = AnUsage->getPreservedSet();
723 for (std::map<AnalysisID, Pass*>::iterator I = AvailableAnalysis.begin(),
724 E = AvailableAnalysis.end(); I != E; ) {
725 std::map<AnalysisID, Pass*>::iterator Info = I++;
726 if (Info->second->getAsImmutablePass() == 0 &&
727 std::find(PreservedSet.begin(), PreservedSet.end(), Info->first) ==
728 PreservedSet.end()) {
729 // Remove this analysis
730 if (PassDebugging >= Details) {
731 Pass *S = Info->second;
732 dbgs() << " -- '" << P->getPassName() << "' is not preserving '";
733 dbgs() << S->getPassName() << "'\n";
735 AvailableAnalysis.erase(Info);
739 // Check inherited analysis also. If P is not preserving analysis
740 // provided by parent manager then remove it here.
741 for (unsigned Index = 0; Index < PMT_Last; ++Index) {
743 if (!InheritedAnalysis[Index])
746 for (std::map<AnalysisID, Pass*>::iterator
747 I = InheritedAnalysis[Index]->begin(),
748 E = InheritedAnalysis[Index]->end(); I != E; ) {
749 std::map<AnalysisID, Pass *>::iterator Info = I++;
750 if (Info->second->getAsImmutablePass() == 0 &&
751 std::find(PreservedSet.begin(), PreservedSet.end(), Info->first) ==
752 PreservedSet.end()) {
753 // Remove this analysis
754 if (PassDebugging >= Details) {
755 Pass *S = Info->second;
756 dbgs() << " -- '" << P->getPassName() << "' is not preserving '";
757 dbgs() << S->getPassName() << "'\n";
759 InheritedAnalysis[Index]->erase(Info);
765 /// Remove analysis passes that are not used any longer
766 void PMDataManager::removeDeadPasses(Pass *P, StringRef Msg,
767 enum PassDebuggingString DBG_STR) {
769 SmallVector<Pass *, 12> DeadPasses;
771 // If this is a on the fly manager then it does not have TPM.
775 TPM->collectLastUses(DeadPasses, P);
777 if (PassDebugging >= Details && !DeadPasses.empty()) {
778 dbgs() << " -*- '" << P->getPassName();
779 dbgs() << "' is the last user of following pass instances.";
780 dbgs() << " Free these instances\n";
783 for (SmallVector<Pass *, 12>::iterator I = DeadPasses.begin(),
784 E = DeadPasses.end(); I != E; ++I)
785 freePass(*I, Msg, DBG_STR);
788 void PMDataManager::freePass(Pass *P, StringRef Msg,
789 enum PassDebuggingString DBG_STR) {
790 dumpPassInfo(P, FREEING_MSG, DBG_STR, Msg);
793 // If the pass crashes releasing memory, remember this.
794 PassManagerPrettyStackEntry X(P);
796 Timer *T = StartPassTimer(P);
801 if (const PassInfo *PI = P->getPassInfo()) {
802 // Remove the pass itself (if it is not already removed).
803 AvailableAnalysis.erase(PI);
805 // Remove all interfaces this pass implements, for which it is also
806 // listed as the available implementation.
807 const std::vector<const PassInfo*> &II = PI->getInterfacesImplemented();
808 for (unsigned i = 0, e = II.size(); i != e; ++i) {
809 std::map<AnalysisID, Pass*>::iterator Pos =
810 AvailableAnalysis.find(II[i]);
811 if (Pos != AvailableAnalysis.end() && Pos->second == P)
812 AvailableAnalysis.erase(Pos);
817 /// Add pass P into the PassVector. Update
818 /// AvailableAnalysis appropriately if ProcessAnalysis is true.
819 void PMDataManager::add(Pass *P, bool ProcessAnalysis) {
820 // This manager is going to manage pass P. Set up analysis resolver
822 AnalysisResolver *AR = new AnalysisResolver(*this);
825 // If a FunctionPass F is the last user of ModulePass info M
826 // then the F's manager, not F, records itself as a last user of M.
827 SmallVector<Pass *, 12> TransferLastUses;
829 if (!ProcessAnalysis) {
831 PassVector.push_back(P);
835 // At the moment, this pass is the last user of all required passes.
836 SmallVector<Pass *, 12> LastUses;
837 SmallVector<Pass *, 8> RequiredPasses;
838 SmallVector<AnalysisID, 8> ReqAnalysisNotAvailable;
840 unsigned PDepth = this->getDepth();
842 collectRequiredAnalysis(RequiredPasses,
843 ReqAnalysisNotAvailable, P);
844 for (SmallVector<Pass *, 8>::iterator I = RequiredPasses.begin(),
845 E = RequiredPasses.end(); I != E; ++I) {
846 Pass *PRequired = *I;
849 assert(PRequired->getResolver() && "Analysis Resolver is not set");
850 PMDataManager &DM = PRequired->getResolver()->getPMDataManager();
851 RDepth = DM.getDepth();
853 if (PDepth == RDepth)
854 LastUses.push_back(PRequired);
855 else if (PDepth > RDepth) {
856 // Let the parent claim responsibility of last use
857 TransferLastUses.push_back(PRequired);
858 // Keep track of higher level analysis used by this manager.
859 HigherLevelAnalysis.push_back(PRequired);
861 llvm_unreachable("Unable to accomodate Required Pass");
864 // Set P as P's last user until someone starts using P.
865 // However, if P is a Pass Manager then it does not need
866 // to record its last user.
867 if (P->getAsPMDataManager() == 0)
868 LastUses.push_back(P);
869 TPM->setLastUser(LastUses, P);
871 if (!TransferLastUses.empty()) {
872 Pass *My_PM = getAsPass();
873 TPM->setLastUser(TransferLastUses, My_PM);
874 TransferLastUses.clear();
877 // Now, take care of required analysises that are not available.
878 for (SmallVector<AnalysisID, 8>::iterator
879 I = ReqAnalysisNotAvailable.begin(),
880 E = ReqAnalysisNotAvailable.end() ;I != E; ++I) {
881 Pass *AnalysisPass = (*I)->createPass();
882 this->addLowerLevelRequiredPass(P, AnalysisPass);
885 // Take a note of analysis required and made available by this pass.
886 // Remove the analysis not preserved by this pass
887 removeNotPreservedAnalysis(P);
888 recordAvailableAnalysis(P);
891 PassVector.push_back(P);
895 /// Populate RP with analysis pass that are required by
896 /// pass P and are available. Populate RP_NotAvail with analysis
897 /// pass that are required by pass P but are not available.
898 void PMDataManager::collectRequiredAnalysis(SmallVector<Pass *, 8>&RP,
899 SmallVector<AnalysisID, 8> &RP_NotAvail,
901 AnalysisUsage *AnUsage = TPM->findAnalysisUsage(P);
902 const AnalysisUsage::VectorType &RequiredSet = AnUsage->getRequiredSet();
903 for (AnalysisUsage::VectorType::const_iterator
904 I = RequiredSet.begin(), E = RequiredSet.end(); I != E; ++I) {
905 if (Pass *AnalysisPass = findAnalysisPass(*I, true))
906 RP.push_back(AnalysisPass);
908 RP_NotAvail.push_back(*I);
911 const AnalysisUsage::VectorType &IDs = AnUsage->getRequiredTransitiveSet();
912 for (AnalysisUsage::VectorType::const_iterator I = IDs.begin(),
913 E = IDs.end(); I != E; ++I) {
914 if (Pass *AnalysisPass = findAnalysisPass(*I, true))
915 RP.push_back(AnalysisPass);
917 RP_NotAvail.push_back(*I);
921 // All Required analyses should be available to the pass as it runs! Here
922 // we fill in the AnalysisImpls member of the pass so that it can
923 // successfully use the getAnalysis() method to retrieve the
924 // implementations it needs.
926 void PMDataManager::initializeAnalysisImpl(Pass *P) {
927 AnalysisUsage *AnUsage = TPM->findAnalysisUsage(P);
929 for (AnalysisUsage::VectorType::const_iterator
930 I = AnUsage->getRequiredSet().begin(),
931 E = AnUsage->getRequiredSet().end(); I != E; ++I) {
932 Pass *Impl = findAnalysisPass(*I, true);
934 // This may be analysis pass that is initialized on the fly.
935 // If that is not the case then it will raise an assert when it is used.
937 AnalysisResolver *AR = P->getResolver();
938 assert(AR && "Analysis Resolver is not set");
939 AR->addAnalysisImplsPair(*I, Impl);
943 /// Find the pass that implements Analysis AID. If desired pass is not found
944 /// then return NULL.
945 Pass *PMDataManager::findAnalysisPass(AnalysisID AID, bool SearchParent) {
947 // Check if AvailableAnalysis map has one entry.
948 std::map<AnalysisID, Pass*>::const_iterator I = AvailableAnalysis.find(AID);
950 if (I != AvailableAnalysis.end())
953 // Search Parents through TopLevelManager
955 return TPM->findAnalysisPass(AID);
960 // Print list of passes that are last used by P.
961 void PMDataManager::dumpLastUses(Pass *P, unsigned Offset) const{
963 SmallVector<Pass *, 12> LUses;
965 // If this is a on the fly manager then it does not have TPM.
969 TPM->collectLastUses(LUses, P);
971 for (SmallVector<Pass *, 12>::iterator I = LUses.begin(),
972 E = LUses.end(); I != E; ++I) {
973 llvm::dbgs() << "--" << std::string(Offset*2, ' ');
974 (*I)->dumpPassStructure(0);
978 void PMDataManager::dumpPassArguments() const {
979 for (SmallVector<Pass *, 8>::const_iterator I = PassVector.begin(),
980 E = PassVector.end(); I != E; ++I) {
981 if (PMDataManager *PMD = (*I)->getAsPMDataManager())
982 PMD->dumpPassArguments();
984 if (const PassInfo *PI = (*I)->getPassInfo())
985 if (!PI->isAnalysisGroup())
986 dbgs() << " -" << PI->getPassArgument();
990 void PMDataManager::dumpPassInfo(Pass *P, enum PassDebuggingString S1,
991 enum PassDebuggingString S2,
993 if (PassDebugging < Executions)
995 dbgs() << (void*)this << std::string(getDepth()*2+1, ' ');
998 dbgs() << "Executing Pass '" << P->getPassName();
1000 case MODIFICATION_MSG:
1001 dbgs() << "Made Modification '" << P->getPassName();
1004 dbgs() << " Freeing Pass '" << P->getPassName();
1010 case ON_BASICBLOCK_MSG:
1011 dbgs() << "' on BasicBlock '" << Msg << "'...\n";
1013 case ON_FUNCTION_MSG:
1014 dbgs() << "' on Function '" << Msg << "'...\n";
1017 dbgs() << "' on Module '" << Msg << "'...\n";
1020 dbgs() << "' on Loop '" << Msg << "'...\n";
1023 dbgs() << "' on Call Graph Nodes '" << Msg << "'...\n";
1030 void PMDataManager::dumpRequiredSet(const Pass *P) const {
1031 if (PassDebugging < Details)
1034 AnalysisUsage analysisUsage;
1035 P->getAnalysisUsage(analysisUsage);
1036 dumpAnalysisUsage("Required", P, analysisUsage.getRequiredSet());
1039 void PMDataManager::dumpPreservedSet(const Pass *P) const {
1040 if (PassDebugging < Details)
1043 AnalysisUsage analysisUsage;
1044 P->getAnalysisUsage(analysisUsage);
1045 dumpAnalysisUsage("Preserved", P, analysisUsage.getPreservedSet());
1048 void PMDataManager::dumpAnalysisUsage(StringRef Msg, const Pass *P,
1049 const AnalysisUsage::VectorType &Set) const {
1050 assert(PassDebugging >= Details);
1053 dbgs() << (void*)P << std::string(getDepth()*2+3, ' ') << Msg << " Analyses:";
1054 for (unsigned i = 0; i != Set.size(); ++i) {
1055 if (i) dbgs() << ',';
1056 dbgs() << ' ' << Set[i]->getPassName();
1061 /// Add RequiredPass into list of lower level passes required by pass P.
1062 /// RequiredPass is run on the fly by Pass Manager when P requests it
1063 /// through getAnalysis interface.
1064 /// This should be handled by specific pass manager.
1065 void PMDataManager::addLowerLevelRequiredPass(Pass *P, Pass *RequiredPass) {
1067 TPM->dumpArguments();
1071 // Module Level pass may required Function Level analysis info
1072 // (e.g. dominator info). Pass manager uses on the fly function pass manager
1073 // to provide this on demand. In that case, in Pass manager terminology,
1074 // module level pass is requiring lower level analysis info managed by
1075 // lower level pass manager.
1077 // When Pass manager is not able to order required analysis info, Pass manager
1078 // checks whether any lower level manager will be able to provide this
1079 // analysis info on demand or not.
1081 dbgs() << "Unable to schedule '" << RequiredPass->getPassName();
1082 dbgs() << "' required by '" << P->getPassName() << "'\n";
1084 llvm_unreachable("Unable to schedule pass");
1088 PMDataManager::~PMDataManager() {
1089 for (SmallVector<Pass *, 8>::iterator I = PassVector.begin(),
1090 E = PassVector.end(); I != E; ++I)
1094 //===----------------------------------------------------------------------===//
1095 // NOTE: Is this the right place to define this method ?
1096 // getAnalysisIfAvailable - Return analysis result or null if it doesn't exist.
1097 Pass *AnalysisResolver::getAnalysisIfAvailable(AnalysisID ID, bool dir) const {
1098 return PM.findAnalysisPass(ID, dir);
1101 Pass *AnalysisResolver::findImplPass(Pass *P, const PassInfo *AnalysisPI,
1103 return PM.getOnTheFlyPass(P, AnalysisPI, F);
1106 //===----------------------------------------------------------------------===//
1107 // BBPassManager implementation
1109 /// Execute all of the passes scheduled for execution by invoking
1110 /// runOnBasicBlock method. Keep track of whether any of the passes modifies
1111 /// the function, and if so, return true.
1112 bool BBPassManager::runOnFunction(Function &F) {
1113 if (F.isDeclaration())
1116 bool Changed = doInitialization(F);
1118 for (Function::iterator I = F.begin(), E = F.end(); I != E; ++I)
1119 for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
1120 BasicBlockPass *BP = getContainedPass(Index);
1122 dumpPassInfo(BP, EXECUTION_MSG, ON_BASICBLOCK_MSG, I->getName());
1123 dumpRequiredSet(BP);
1125 initializeAnalysisImpl(BP);
1128 // If the pass crashes, remember this.
1129 PassManagerPrettyStackEntry X(BP, *I);
1131 Timer *T = StartPassTimer(BP);
1132 Changed |= BP->runOnBasicBlock(*I);
1133 StopPassTimer(BP, T);
1137 dumpPassInfo(BP, MODIFICATION_MSG, ON_BASICBLOCK_MSG,
1139 dumpPreservedSet(BP);
1141 verifyPreservedAnalysis(BP);
1142 removeNotPreservedAnalysis(BP);
1143 recordAvailableAnalysis(BP);
1144 removeDeadPasses(BP, I->getName(), ON_BASICBLOCK_MSG);
1147 return doFinalization(F) || Changed;
1150 // Implement doInitialization and doFinalization
1151 bool BBPassManager::doInitialization(Module &M) {
1152 bool Changed = false;
1154 for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index)
1155 Changed |= getContainedPass(Index)->doInitialization(M);
1160 bool BBPassManager::doFinalization(Module &M) {
1161 bool Changed = false;
1163 for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index)
1164 Changed |= getContainedPass(Index)->doFinalization(M);
1169 bool BBPassManager::doInitialization(Function &F) {
1170 bool Changed = false;
1172 for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
1173 BasicBlockPass *BP = getContainedPass(Index);
1174 Changed |= BP->doInitialization(F);
1180 bool BBPassManager::doFinalization(Function &F) {
1181 bool Changed = false;
1183 for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
1184 BasicBlockPass *BP = getContainedPass(Index);
1185 Changed |= BP->doFinalization(F);
1192 //===----------------------------------------------------------------------===//
1193 // FunctionPassManager implementation
1195 /// Create new Function pass manager
1196 FunctionPassManager::FunctionPassManager(Module *m) : M(m) {
1197 FPM = new FunctionPassManagerImpl(0);
1198 // FPM is the top level manager.
1199 FPM->setTopLevelManager(FPM);
1201 AnalysisResolver *AR = new AnalysisResolver(*FPM);
1202 FPM->setResolver(AR);
1205 FunctionPassManager::~FunctionPassManager() {
1209 /// add - Add a pass to the queue of passes to run. This passes
1210 /// ownership of the Pass to the PassManager. When the
1211 /// PassManager_X is destroyed, the pass will be destroyed as well, so
1212 /// there is no need to delete the pass. (TODO delete passes.)
1213 /// This implies that all passes MUST be allocated with 'new'.
1214 void FunctionPassManager::add(Pass *P) {
1218 /// run - Execute all of the passes scheduled for execution. Keep
1219 /// track of whether any of the passes modifies the function, and if
1220 /// so, return true.
1222 bool FunctionPassManager::run(Function &F) {
1224 if (F.Materialize(&errstr)) {
1225 llvm_report_error("Error reading bitcode file: " + errstr);
1231 /// doInitialization - Run all of the initializers for the function passes.
1233 bool FunctionPassManager::doInitialization() {
1234 return FPM->doInitialization(*M);
1237 /// doFinalization - Run all of the finalizers for the function passes.
1239 bool FunctionPassManager::doFinalization() {
1240 return FPM->doFinalization(*M);
1243 //===----------------------------------------------------------------------===//
1244 // FunctionPassManagerImpl implementation
1246 bool FunctionPassManagerImpl::doInitialization(Module &M) {
1247 bool Changed = false;
1252 for (unsigned Index = 0; Index < getNumContainedManagers(); ++Index)
1253 Changed |= getContainedManager(Index)->doInitialization(M);
1258 bool FunctionPassManagerImpl::doFinalization(Module &M) {
1259 bool Changed = false;
1261 for (unsigned Index = 0; Index < getNumContainedManagers(); ++Index)
1262 Changed |= getContainedManager(Index)->doFinalization(M);
1267 /// cleanup - After running all passes, clean up pass manager cache.
1268 void FPPassManager::cleanup() {
1269 for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
1270 FunctionPass *FP = getContainedPass(Index);
1271 AnalysisResolver *AR = FP->getResolver();
1272 assert(AR && "Analysis Resolver is not set");
1273 AR->clearAnalysisImpls();
1277 void FunctionPassManagerImpl::releaseMemoryOnTheFly() {
1280 for (unsigned Index = 0; Index < getNumContainedManagers(); ++Index) {
1281 FPPassManager *FPPM = getContainedManager(Index);
1282 for (unsigned Index = 0; Index < FPPM->getNumContainedPasses(); ++Index) {
1283 FPPM->getContainedPass(Index)->releaseMemory();
1289 // Execute all the passes managed by this top level manager.
1290 // Return true if any function is modified by a pass.
1291 bool FunctionPassManagerImpl::run(Function &F) {
1292 bool Changed = false;
1293 TimingInfo::createTheTimeInfo();
1295 initializeAllAnalysisInfo();
1296 for (unsigned Index = 0; Index < getNumContainedManagers(); ++Index)
1297 Changed |= getContainedManager(Index)->runOnFunction(F);
1299 for (unsigned Index = 0; Index < getNumContainedManagers(); ++Index)
1300 getContainedManager(Index)->cleanup();
1306 //===----------------------------------------------------------------------===//
1307 // FPPassManager implementation
1309 char FPPassManager::ID = 0;
1310 /// Print passes managed by this manager
1311 void FPPassManager::dumpPassStructure(unsigned Offset) {
1312 llvm::dbgs() << std::string(Offset*2, ' ') << "FunctionPass Manager\n";
1313 for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
1314 FunctionPass *FP = getContainedPass(Index);
1315 FP->dumpPassStructure(Offset + 1);
1316 dumpLastUses(FP, Offset+1);
1321 /// Execute all of the passes scheduled for execution by invoking
1322 /// runOnFunction method. Keep track of whether any of the passes modifies
1323 /// the function, and if so, return true.
1324 bool FPPassManager::runOnFunction(Function &F) {
1325 if (F.isDeclaration())
1328 bool Changed = false;
1330 // Collect inherited analysis from Module level pass manager.
1331 populateInheritedAnalysis(TPM->activeStack);
1333 for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
1334 FunctionPass *FP = getContainedPass(Index);
1336 dumpPassInfo(FP, EXECUTION_MSG, ON_FUNCTION_MSG, F.getName());
1337 dumpRequiredSet(FP);
1339 initializeAnalysisImpl(FP);
1342 PassManagerPrettyStackEntry X(FP, F);
1344 Timer *T = StartPassTimer(FP);
1345 Changed |= FP->runOnFunction(F);
1346 StopPassTimer(FP, T);
1350 dumpPassInfo(FP, MODIFICATION_MSG, ON_FUNCTION_MSG, F.getName());
1351 dumpPreservedSet(FP);
1353 verifyPreservedAnalysis(FP);
1354 removeNotPreservedAnalysis(FP);
1355 recordAvailableAnalysis(FP);
1356 removeDeadPasses(FP, F.getName(), ON_FUNCTION_MSG);
1361 bool FPPassManager::runOnModule(Module &M) {
1362 bool Changed = doInitialization(M);
1364 for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
1367 return doFinalization(M) || Changed;
1370 bool FPPassManager::doInitialization(Module &M) {
1371 bool Changed = false;
1373 for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index)
1374 Changed |= getContainedPass(Index)->doInitialization(M);
1379 bool FPPassManager::doFinalization(Module &M) {
1380 bool Changed = false;
1382 for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index)
1383 Changed |= getContainedPass(Index)->doFinalization(M);
1388 //===----------------------------------------------------------------------===//
1389 // MPPassManager implementation
1391 /// Execute all of the passes scheduled for execution by invoking
1392 /// runOnModule method. Keep track of whether any of the passes modifies
1393 /// the module, and if so, return true.
1395 MPPassManager::runOnModule(Module &M) {
1396 bool Changed = false;
1398 // Initialize on-the-fly passes
1399 for (std::map<Pass *, FunctionPassManagerImpl *>::iterator
1400 I = OnTheFlyManagers.begin(), E = OnTheFlyManagers.end();
1402 FunctionPassManagerImpl *FPP = I->second;
1403 Changed |= FPP->doInitialization(M);
1406 for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
1407 ModulePass *MP = getContainedPass(Index);
1409 dumpPassInfo(MP, EXECUTION_MSG, ON_MODULE_MSG, M.getModuleIdentifier());
1410 dumpRequiredSet(MP);
1412 initializeAnalysisImpl(MP);
1415 PassManagerPrettyStackEntry X(MP, M);
1416 Timer *T = StartPassTimer(MP);
1417 Changed |= MP->runOnModule(M);
1418 StopPassTimer(MP, T);
1422 dumpPassInfo(MP, MODIFICATION_MSG, ON_MODULE_MSG,
1423 M.getModuleIdentifier());
1424 dumpPreservedSet(MP);
1426 verifyPreservedAnalysis(MP);
1427 removeNotPreservedAnalysis(MP);
1428 recordAvailableAnalysis(MP);
1429 removeDeadPasses(MP, M.getModuleIdentifier(), ON_MODULE_MSG);
1432 // Finalize on-the-fly passes
1433 for (std::map<Pass *, FunctionPassManagerImpl *>::iterator
1434 I = OnTheFlyManagers.begin(), E = OnTheFlyManagers.end();
1436 FunctionPassManagerImpl *FPP = I->second;
1437 // We don't know when is the last time an on-the-fly pass is run,
1438 // so we need to releaseMemory / finalize here
1439 FPP->releaseMemoryOnTheFly();
1440 Changed |= FPP->doFinalization(M);
1445 /// Add RequiredPass into list of lower level passes required by pass P.
1446 /// RequiredPass is run on the fly by Pass Manager when P requests it
1447 /// through getAnalysis interface.
1448 void MPPassManager::addLowerLevelRequiredPass(Pass *P, Pass *RequiredPass) {
1449 assert(P->getPotentialPassManagerType() == PMT_ModulePassManager &&
1450 "Unable to handle Pass that requires lower level Analysis pass");
1451 assert((P->getPotentialPassManagerType() <
1452 RequiredPass->getPotentialPassManagerType()) &&
1453 "Unable to handle Pass that requires lower level Analysis pass");
1455 FunctionPassManagerImpl *FPP = OnTheFlyManagers[P];
1457 FPP = new FunctionPassManagerImpl(0);
1458 // FPP is the top level manager.
1459 FPP->setTopLevelManager(FPP);
1461 OnTheFlyManagers[P] = FPP;
1463 FPP->add(RequiredPass);
1465 // Register P as the last user of RequiredPass.
1466 SmallVector<Pass *, 12> LU;
1467 LU.push_back(RequiredPass);
1468 FPP->setLastUser(LU, P);
1471 /// Return function pass corresponding to PassInfo PI, that is
1472 /// required by module pass MP. Instantiate analysis pass, by using
1473 /// its runOnFunction() for function F.
1474 Pass* MPPassManager::getOnTheFlyPass(Pass *MP, const PassInfo *PI, Function &F){
1475 FunctionPassManagerImpl *FPP = OnTheFlyManagers[MP];
1476 assert(FPP && "Unable to find on the fly pass");
1478 FPP->releaseMemoryOnTheFly();
1480 return ((PMTopLevelManager*)FPP)->findAnalysisPass(PI);
1484 //===----------------------------------------------------------------------===//
1485 // PassManagerImpl implementation
1487 /// run - Execute all of the passes scheduled for execution. Keep track of
1488 /// whether any of the passes modifies the module, and if so, return true.
1489 bool PassManagerImpl::run(Module &M) {
1490 bool Changed = false;
1491 TimingInfo::createTheTimeInfo();
1496 initializeAllAnalysisInfo();
1497 for (unsigned Index = 0; Index < getNumContainedManagers(); ++Index)
1498 Changed |= getContainedManager(Index)->runOnModule(M);
1502 //===----------------------------------------------------------------------===//
1503 // PassManager implementation
1505 /// Create new pass manager
1506 PassManager::PassManager() {
1507 PM = new PassManagerImpl(0);
1508 // PM is the top level manager
1509 PM->setTopLevelManager(PM);
1512 PassManager::~PassManager() {
1516 /// add - Add a pass to the queue of passes to run. This passes ownership of
1517 /// the Pass to the PassManager. When the PassManager is destroyed, the pass
1518 /// will be destroyed as well, so there is no need to delete the pass. This
1519 /// implies that all passes MUST be allocated with 'new'.
1520 void PassManager::add(Pass *P) {
1524 /// run - Execute all of the passes scheduled for execution. Keep track of
1525 /// whether any of the passes modifies the module, and if so, return true.
1526 bool PassManager::run(Module &M) {
1530 //===----------------------------------------------------------------------===//
1531 // TimingInfo Class - This class is used to calculate information about the
1532 // amount of time each pass takes to execute. This only happens with
1533 // -time-passes is enabled on the command line.
1535 bool llvm::TimePassesIsEnabled = false;
1536 static cl::opt<bool,true>
1537 EnableTiming("time-passes", cl::location(TimePassesIsEnabled),
1538 cl::desc("Time each pass, printing elapsed time for each on exit"));
1540 // createTheTimeInfo - This method either initializes the TheTimeInfo pointer to
1541 // a non null value (if the -time-passes option is enabled) or it leaves it
1542 // null. It may be called multiple times.
1543 void TimingInfo::createTheTimeInfo() {
1544 if (!TimePassesIsEnabled || TheTimeInfo) return;
1546 // Constructed the first time this is called, iff -time-passes is enabled.
1547 // This guarantees that the object will be constructed before static globals,
1548 // thus it will be destroyed before them.
1549 static ManagedStatic<TimingInfo> TTI;
1550 TheTimeInfo = &*TTI;
1553 /// If TimingInfo is enabled then start pass timer.
1554 Timer *llvm::StartPassTimer(Pass *P) {
1556 return TheTimeInfo->passStarted(P);
1560 /// If TimingInfo is enabled then stop pass timer.
1561 void llvm::StopPassTimer(Pass *P, Timer *T) {
1562 if (T) T->stopTimer();
1565 //===----------------------------------------------------------------------===//
1566 // PMStack implementation
1569 // Pop Pass Manager from the stack and clear its analysis info.
1570 void PMStack::pop() {
1572 PMDataManager *Top = this->top();
1573 Top->initializeAnalysisInfo();
1578 // Push PM on the stack and set its top level manager.
1579 void PMStack::push(PMDataManager *PM) {
1580 assert(PM && "Unable to push. Pass Manager expected");
1582 if (!this->empty()) {
1583 PMTopLevelManager *TPM = this->top()->getTopLevelManager();
1585 assert(TPM && "Unable to find top level manager");
1586 TPM->addIndirectPassManager(PM);
1587 PM->setTopLevelManager(TPM);
1593 // Dump content of the pass manager stack.
1594 void PMStack::dump() {
1595 for (std::deque<PMDataManager *>::iterator I = S.begin(),
1596 E = S.end(); I != E; ++I)
1597 printf("%s ", (*I)->getAsPass()->getPassName());
1603 /// Find appropriate Module Pass Manager in the PM Stack and
1604 /// add self into that manager.
1605 void ModulePass::assignPassManager(PMStack &PMS,
1606 PassManagerType PreferredType) {
1607 // Find Module Pass Manager
1608 while(!PMS.empty()) {
1609 PassManagerType TopPMType = PMS.top()->getPassManagerType();
1610 if (TopPMType == PreferredType)
1611 break; // We found desired pass manager
1612 else if (TopPMType > PMT_ModulePassManager)
1613 PMS.pop(); // Pop children pass managers
1617 assert(!PMS.empty() && "Unable to find appropriate Pass Manager");
1618 PMS.top()->add(this);
1621 /// Find appropriate Function Pass Manager or Call Graph Pass Manager
1622 /// in the PM Stack and add self into that manager.
1623 void FunctionPass::assignPassManager(PMStack &PMS,
1624 PassManagerType PreferredType) {
1626 // Find Module Pass Manager
1627 while (!PMS.empty()) {
1628 if (PMS.top()->getPassManagerType() > PMT_FunctionPassManager)
1634 // Create new Function Pass Manager if needed.
1636 if (PMS.top()->getPassManagerType() == PMT_FunctionPassManager) {
1637 FPP = (FPPassManager *)PMS.top();
1639 assert(!PMS.empty() && "Unable to create Function Pass Manager");
1640 PMDataManager *PMD = PMS.top();
1642 // [1] Create new Function Pass Manager
1643 FPP = new FPPassManager(PMD->getDepth() + 1);
1644 FPP->populateInheritedAnalysis(PMS);
1646 // [2] Set up new manager's top level manager
1647 PMTopLevelManager *TPM = PMD->getTopLevelManager();
1648 TPM->addIndirectPassManager(FPP);
1650 // [3] Assign manager to manage this new manager. This may create
1651 // and push new managers into PMS
1652 FPP->assignPassManager(PMS, PMD->getPassManagerType());
1654 // [4] Push new manager into PMS
1658 // Assign FPP as the manager of this pass.
1662 /// Find appropriate Basic Pass Manager or Call Graph Pass Manager
1663 /// in the PM Stack and add self into that manager.
1664 void BasicBlockPass::assignPassManager(PMStack &PMS,
1665 PassManagerType PreferredType) {
1668 // Basic Pass Manager is a leaf pass manager. It does not handle
1669 // any other pass manager.
1671 PMS.top()->getPassManagerType() == PMT_BasicBlockPassManager) {
1672 BBP = (BBPassManager *)PMS.top();
1674 // If leaf manager is not Basic Block Pass manager then create new
1675 // basic Block Pass manager.
1676 assert(!PMS.empty() && "Unable to create BasicBlock Pass Manager");
1677 PMDataManager *PMD = PMS.top();
1679 // [1] Create new Basic Block Manager
1680 BBP = new BBPassManager(PMD->getDepth() + 1);
1682 // [2] Set up new manager's top level manager
1683 // Basic Block Pass Manager does not live by itself
1684 PMTopLevelManager *TPM = PMD->getTopLevelManager();
1685 TPM->addIndirectPassManager(BBP);
1687 // [3] Assign manager to manage this new manager. This may create
1688 // and push new managers into PMS
1689 BBP->assignPassManager(PMS);
1691 // [4] Push new manager into PMS
1695 // Assign BBP as the manager of this pass.
1699 PassManagerBase::~PassManagerBase() {}
1701 /*===-- C Bindings --------------------------------------------------------===*/
1703 LLVMPassManagerRef LLVMCreatePassManager() {
1704 return wrap(new PassManager());
1707 LLVMPassManagerRef LLVMCreateFunctionPassManager(LLVMModuleProviderRef P) {
1708 return wrap(new FunctionPassManager(unwrap(P)));
1711 LLVMBool LLVMRunPassManager(LLVMPassManagerRef PM, LLVMModuleRef M) {
1712 return unwrap<PassManager>(PM)->run(*unwrap(M));
1715 LLVMBool LLVMInitializeFunctionPassManager(LLVMPassManagerRef FPM) {
1716 return unwrap<FunctionPassManager>(FPM)->doInitialization();
1719 LLVMBool LLVMRunFunctionPassManager(LLVMPassManagerRef FPM, LLVMValueRef F) {
1720 return unwrap<FunctionPassManager>(FPM)->run(*unwrap<Function>(F));
1723 LLVMBool LLVMFinalizeFunctionPassManager(LLVMPassManagerRef FPM) {
1724 return unwrap<FunctionPassManager>(FPM)->doFinalization();
1727 void LLVMDisposePassManager(LLVMPassManagerRef PM) {