1 //===- PassManager.cpp - LLVM Pass Infrastructure Implementation ----------===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by Devang Patel and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the LLVM Pass Manager infrastructure.
12 //===----------------------------------------------------------------------===//
15 #include "llvm/PassManager.h"
16 #include "llvm/Module.h"
17 #include "llvm/ModuleProvider.h"
18 #include "llvm/Support/Streams.h"
23 //===----------------------------------------------------------------------===//
25 // The Pass Manager Infrastructure manages passes. It's responsibilities are:
27 // o Manage optimization pass execution order
28 // o Make required Analysis information available before pass P is run
29 // o Release memory occupied by dead passes
30 // o If Analysis information is dirtied by a pass then regenerate Analysis
31 // information before it is consumed by another pass.
33 // Pass Manager Infrastructure uses multipe pass managers. They are PassManager,
34 // FunctionPassManager, ModulePassManager, BasicBlockPassManager. This class
35 // hierarcy uses multiple inheritance but pass managers do not derive from
36 // another pass manager.
38 // PassManager and FunctionPassManager are two top level pass manager that
39 // represents the external interface of this entire pass manager infrastucture.
41 // Important classes :
43 // [o] class PMTopLevelManager;
45 // Two top level managers, PassManager and FunctionPassManager, derive from
46 // PMTopLevelManager. PMTopLevelManager manages information used by top level
47 // managers such as last user info.
49 // [o] class PMDataManager;
51 // PMDataManager manages information, e.g. list of available analysis info,
52 // used by a pass manager to manage execution order of passes. It also provides
53 // a place to implement common pass manager APIs. All pass managers derive from
56 // [o] class BasicBlockPassManager : public FunctionPass, public PMDataManager;
58 // BasicBlockPassManager manages BasicBlockPasses.
60 // [o] class FunctionPassManager;
62 // This is a external interface used by JIT to manage FunctionPasses. This
63 // interface relies on FunctionPassManagerImpl to do all the tasks.
65 // [o] class FunctionPassManagerImpl : public ModulePass, PMDataManager,
66 // public PMTopLevelManager;
68 // FunctionPassManagerImpl is a top level manager. It manages FunctionPasses
69 // and BasicBlockPassManagers.
71 // [o] class ModulePassManager : public Pass, public PMDataManager;
73 // ModulePassManager manages ModulePasses and FunctionPassManagerImpls.
75 // [o] class PassManager;
77 // This is a external interface used by various tools to manages passes. It
78 // relies on PassManagerImpl to do all the tasks.
80 // [o] class PassManagerImpl : public Pass, public PMDataManager,
81 // public PMDTopLevelManager
83 // PassManagerImpl is a top level pass manager responsible for managing
84 // ModulePassManagers.
85 //===----------------------------------------------------------------------===//
89 //===----------------------------------------------------------------------===//
92 /// PMTopLevelManager manages LastUser info and collects common APIs used by
93 /// top level pass managers.
94 class PMTopLevelManager {
98 inline std::vector<Pass *>::iterator passManagersBegin() {
99 return PassManagers.begin();
102 inline std::vector<Pass *>::iterator passManagersEnd() {
103 return PassManagers.end();
106 /// Schedule pass P for execution. Make sure that passes required by
107 /// P are run before P is run. Update analysis info maintained by
108 /// the manager. Remove dead passes. This is a recursive function.
109 void schedulePass(Pass *P, Pass *PM);
111 /// This is implemented by top level pass manager and used by
112 /// schedulePass() to add analysis info passes that are not available.
113 virtual void addTopLevelPass(Pass *P) = 0;
115 /// Set pass P as the last user of the given analysis passes.
116 void setLastUser(std::vector<Pass *> &AnalysisPasses, Pass *P);
118 /// Collect passes whose last user is P
119 void collectLastUses(std::vector<Pass *> &LastUses, Pass *P);
121 virtual ~PMTopLevelManager() {
122 PassManagers.clear();
125 /// Add immutable pass and initialize it.
126 inline void addImmutablePass(ImmutablePass *P) {
128 ImmutablePasses.push_back(P);
131 inline std::vector<ImmutablePass *>& getImmutablePasses() {
132 return ImmutablePasses;
137 /// Collection of pass managers
138 std::vector<Pass *> PassManagers;
140 // Map to keep track of last user of the analysis pass.
141 // LastUser->second is the last user of Lastuser->first.
142 std::map<Pass *, Pass *> LastUser;
144 /// Immutable passes are managed by top level manager.
145 std::vector<ImmutablePass *> ImmutablePasses;
148 /// Set pass P as the last user of the given analysis passes.
149 void PMTopLevelManager::setLastUser(std::vector<Pass *> &AnalysisPasses,
152 for (std::vector<Pass *>::iterator I = AnalysisPasses.begin(),
153 E = AnalysisPasses.end(); I != E; ++I) {
156 // If AP is the last user of other passes then make P last user of
158 for (std::map<Pass *, Pass *>::iterator LUI = LastUser.begin(),
159 LUE = LastUser.end(); LUI != LUE; ++LUI) {
160 if (LUI->second == AP)
161 LastUser[LUI->first] = P;
167 /// Collect passes whose last user is P
168 void PMTopLevelManager::collectLastUses(std::vector<Pass *> &LastUses,
170 for (std::map<Pass *, Pass *>::iterator LUI = LastUser.begin(),
171 LUE = LastUser.end(); LUI != LUE; ++LUI)
172 if (LUI->second == P)
173 LastUses.push_back(LUI->first);
176 /// Schedule pass P for execution. Make sure that passes required by
177 /// P are run before P is run. Update analysis info maintained by
178 /// the manager. Remove dead passes. This is a recursive function.
179 void PMTopLevelManager::schedulePass(Pass *P, Pass *PM) {
181 // TODO : Allocate function manager for this pass, other wise required set
182 // may be inserted into previous function manager
184 AnalysisUsage AnUsage;
185 P->getAnalysisUsage(AnUsage);
186 const std::vector<AnalysisID> &RequiredSet = AnUsage.getRequiredSet();
187 for (std::vector<AnalysisID>::const_iterator I = RequiredSet.begin(),
188 E = RequiredSet.end(); I != E; ++I) {
190 Pass *AnalysisPass = NULL; // FIXME PM->getAnalysisPass(*I, true);
192 // Schedule this analysis run first.
193 AnalysisPass = (*I)->createPass();
194 schedulePass(AnalysisPass, PM);
198 // Now all required passes are available.
203 //===----------------------------------------------------------------------===//
206 /// PMDataManager provides the common place to manage the analysis data
207 /// used by pass managers.
208 class PMDataManager {
212 PMDataManager() : TPM(NULL) {
213 initializeAnalysisInfo();
216 /// Return true IFF pass P's required analysis set does not required new
218 bool manageablePass(Pass *P);
220 Pass *getAnalysisPass(AnalysisID AID) const {
222 std::map<AnalysisID, Pass*>::const_iterator I =
223 AvailableAnalysis.find(AID);
225 if (I != AvailableAnalysis.end())
231 /// Augment AvailableAnalysis by adding analysis made available by pass P.
232 void recordAvailableAnalysis(Pass *P);
234 /// Remove Analysis that is not preserved by the pass
235 void removeNotPreservedAnalysis(Pass *P);
237 /// Remove dead passes
238 void removeDeadPasses(Pass *P);
240 /// Add pass P into the PassVector. Update
241 /// AvailableAnalysis appropriately if ProcessAnalysis is true.
242 void addPassToManager (Pass *P, bool ProcessAnalysis = true);
244 // Initialize available analysis information.
245 void initializeAnalysisInfo() {
246 AvailableAnalysis.clear();
249 // Include immutable passes into AvailableAnalysis vector.
250 std::vector<ImmutablePass *> &ImmutablePasses = TPM->getImmutablePasses();
251 for (std::vector<ImmutablePass *>::iterator I = ImmutablePasses.begin(),
252 E = ImmutablePasses.end(); I != E; ++I)
253 recordAvailableAnalysis(*I);
256 // All Required analyses should be available to the pass as it runs! Here
257 // we fill in the AnalysisImpls member of the pass so that it can
258 // successfully use the getAnalysis() method to retrieve the
259 // implementations it needs.
261 void initializeAnalysisImpl(Pass *P);
263 inline std::vector<Pass *>::iterator passVectorBegin() {
264 return PassVector.begin();
267 inline std::vector<Pass *>::iterator passVectorEnd() {
268 return PassVector.end();
271 inline void setLastUser(Pass *P, Pass *LU) {
273 // TODO : Check if pass P is available.
276 // Access toplevel manager
277 PMTopLevelManager *getTopLevelManager() { return TPM; }
278 void setTopLevelManager(PMTopLevelManager *T) { TPM = T; }
281 // Set of available Analysis. This information is used while scheduling
282 // pass. If a pass requires an analysis which is not not available then
283 // equired analysis pass is scheduled to run before the pass itself is
285 std::map<AnalysisID, Pass*> AvailableAnalysis;
287 // Map to keep track of last user of the analysis pass.
288 // LastUser->second is the last user of Lastuser->first.
289 std::map<Pass *, Pass *> LastUser;
291 // Collection of pass that are managed by this manager
292 std::vector<Pass *> PassVector;
294 // Top level manager.
295 // TODO : Make it a reference.
296 PMTopLevelManager *TPM;
299 /// BasicBlockPassManager_New manages BasicBlockPass. It batches all the
300 /// pass together and sequence them to process one basic block before
301 /// processing next basic block.
302 class BasicBlockPassManager_New : public PMDataManager,
303 public FunctionPass {
306 BasicBlockPassManager_New() { }
308 /// Add a pass into a passmanager queue.
309 bool addPass(Pass *p);
311 /// Execute all of the passes scheduled for execution. Keep track of
312 /// whether any of the passes modifies the function, and if so, return true.
313 bool runOnFunction(Function &F);
315 /// Return true IFF AnalysisID AID is currently available.
316 Pass *getAnalysisPassFromManager(AnalysisID AID);
318 /// Pass Manager itself does not invalidate any analysis info.
319 void getAnalysisUsage(AnalysisUsage &Info) const {
320 Info.setPreservesAll();
326 /// FunctionPassManagerImpl_New manages FunctionPasses and BasicBlockPassManagers.
327 /// It batches all function passes and basic block pass managers together and
328 /// sequence them to process one function at a time before processing next
330 class FunctionPassManagerImpl_New : public ModulePass,
331 public PMDataManager,
332 public PMTopLevelManager {
334 FunctionPassManagerImpl_New(ModuleProvider *P) { /* TODO */ }
335 FunctionPassManagerImpl_New() {
336 activeBBPassManager = NULL;
338 ~FunctionPassManagerImpl_New() { /* TODO */ };
340 inline void addTopLevelPass(Pass *P) {
344 /// add - Add a pass to the queue of passes to run. This passes
345 /// ownership of the Pass to the PassManager. When the
346 /// PassManager_X is destroyed, the pass will be destroyed as well, so
347 /// there is no need to delete the pass. (TODO delete passes.)
348 /// This implies that all passes MUST be allocated with 'new'.
349 void add(Pass *P) { /* TODO*/ }
351 /// Add pass into the pass manager queue.
352 bool addPass(Pass *P);
354 /// Execute all of the passes scheduled for execution. Keep
355 /// track of whether any of the passes modifies the function, and if
357 bool runOnModule(Module &M);
358 bool runOnFunction(Function &F);
360 /// Return true IFF AnalysisID AID is currently available.
361 Pass *getAnalysisPassFromManager(AnalysisID AID);
363 /// doInitialization - Run all of the initializers for the function passes.
365 bool doInitialization(Module &M);
367 /// doFinalization - Run all of the initializers for the function passes.
369 bool doFinalization(Module &M);
371 /// Pass Manager itself does not invalidate any analysis info.
372 void getAnalysisUsage(AnalysisUsage &Info) const {
373 Info.setPreservesAll();
377 // Active Pass Managers
378 BasicBlockPassManager_New *activeBBPassManager;
381 /// ModulePassManager_New manages ModulePasses and function pass managers.
382 /// It batches all Module passes passes and function pass managers together and
383 /// sequence them to process one module.
384 class ModulePassManager_New : public PMDataManager {
387 ModulePassManager_New() { activeFunctionPassManager = NULL; }
389 /// Add a pass into a passmanager queue.
390 bool addPass(Pass *p);
392 /// run - Execute all of the passes scheduled for execution. Keep track of
393 /// whether any of the passes modifies the module, and if so, return true.
394 bool runOnModule(Module &M);
396 /// Return true IFF AnalysisID AID is currently available.
397 Pass *getAnalysisPassFromManager(AnalysisID AID);
399 /// Pass Manager itself does not invalidate any analysis info.
400 void getAnalysisUsage(AnalysisUsage &Info) const {
401 Info.setPreservesAll();
405 // Active Pass Manager
406 FunctionPassManagerImpl_New *activeFunctionPassManager;
409 /// PassManager_New manages ModulePassManagers
410 class PassManagerImpl_New : public PMDataManager,
411 public PMTopLevelManager {
415 /// add - Add a pass to the queue of passes to run. This passes ownership of
416 /// the Pass to the PassManager. When the PassManager is destroyed, the pass
417 /// will be destroyed as well, so there is no need to delete the pass. This
418 /// implies that all passes MUST be allocated with 'new'.
421 /// run - Execute all of the passes scheduled for execution. Keep track of
422 /// whether any of the passes modifies the module, and if so, return true.
425 /// Return true IFF AnalysisID AID is currently available.
426 Pass *getAnalysisPassFromManager(AnalysisID AID);
428 /// Pass Manager itself does not invalidate any analysis info.
429 void getAnalysisUsage(AnalysisUsage &Info) const {
430 Info.setPreservesAll();
433 inline void addTopLevelPass(Pass *P) {
439 /// Add a pass into a passmanager queue.
440 bool addPass(Pass *p);
442 // Collection of pass managers
443 std::vector<ModulePassManager_New *> PassManagers;
445 // Active Pass Manager
446 ModulePassManager_New *activeManager;
449 } // End of llvm namespace
451 //===----------------------------------------------------------------------===//
452 // PMDataManager implementation
454 /// Return true IFF pass P's required analysis set does not required new
456 bool PMDataManager::manageablePass(Pass *P) {
459 // If this pass is not preserving information that is required by a
460 // pass maintained by higher level pass manager then do not insert
461 // this pass into current manager. Use new manager. For example,
462 // For example, If FunctionPass F is not preserving ModulePass Info M1
463 // that is used by another ModulePass M2 then do not insert F in
464 // current function pass manager.
468 /// Augement AvailableAnalysis by adding analysis made available by pass P.
469 void PMDataManager::recordAvailableAnalysis(Pass *P) {
471 if (const PassInfo *PI = P->getPassInfo()) {
472 AvailableAnalysis[PI] = P;
474 //This pass is the current implementation of all of the interfaces it
475 //implements as well.
476 const std::vector<const PassInfo*> &II = PI->getInterfacesImplemented();
477 for (unsigned i = 0, e = II.size(); i != e; ++i)
478 AvailableAnalysis[II[i]] = P;
482 /// Remove Analyss not preserved by Pass P
483 void PMDataManager::removeNotPreservedAnalysis(Pass *P) {
484 AnalysisUsage AnUsage;
485 P->getAnalysisUsage(AnUsage);
487 if (AnUsage.getPreservesAll())
490 const std::vector<AnalysisID> &PreservedSet = AnUsage.getPreservedSet();
491 for (std::map<AnalysisID, Pass*>::iterator I = AvailableAnalysis.begin(),
492 E = AvailableAnalysis.end(); I != E; ++I ) {
493 if (std::find(PreservedSet.begin(), PreservedSet.end(), I->first) ==
494 PreservedSet.end()) {
495 // Remove this analysis
496 std::map<AnalysisID, Pass*>::iterator J = I++;
497 AvailableAnalysis.erase(J);
502 /// Remove analysis passes that are not used any longer
503 void PMDataManager::removeDeadPasses(Pass *P) {
505 for (std::map<Pass *, Pass *>::iterator I = LastUser.begin(),
506 E = LastUser.end(); I !=E; ++I) {
507 if (I->second == P) {
508 Pass *deadPass = I->first;
509 deadPass->releaseMemory();
511 std::map<AnalysisID, Pass*>::iterator Pos =
512 AvailableAnalysis.find(deadPass->getPassInfo());
514 assert (Pos != AvailableAnalysis.end() &&
515 "Pass is not available");
516 AvailableAnalysis.erase(Pos);
521 /// Add pass P into the PassVector. Update
522 /// AvailableAnalysis appropriately if ProcessAnalysis is true.
523 void PMDataManager::addPassToManager(Pass *P,
524 bool ProcessAnalysis) {
526 if (ProcessAnalysis) {
527 // Take a note of analysis required and made available by this pass
528 initializeAnalysisImpl(P);
529 recordAvailableAnalysis(P);
531 // Remove the analysis not preserved by this pass
532 removeNotPreservedAnalysis(P);
536 PassVector.push_back(P);
539 // All Required analyses should be available to the pass as it runs! Here
540 // we fill in the AnalysisImpls member of the pass so that it can
541 // successfully use the getAnalysis() method to retrieve the
542 // implementations it needs.
544 void PMDataManager::initializeAnalysisImpl(Pass *P) {
545 AnalysisUsage AnUsage;
546 P->getAnalysisUsage(AnUsage);
548 for (std::vector<const PassInfo *>::const_iterator
549 I = AnUsage.getRequiredSet().begin(),
550 E = AnUsage.getRequiredSet().end(); I != E; ++I) {
551 Pass *Impl = getAnalysisPass(*I);
553 assert(0 && "Analysis used but not available!");
554 // TODO: P->AnalysisImpls.push_back(std::make_pair(*I, Impl));
558 //===----------------------------------------------------------------------===//
559 // BasicBlockPassManager_New implementation
561 /// Add pass P into PassVector and return true. If this pass is not
562 /// manageable by this manager then return false.
564 BasicBlockPassManager_New::addPass(Pass *P) {
566 BasicBlockPass *BP = dynamic_cast<BasicBlockPass*>(P);
570 // If this pass does not preserve anlysis that is used by other passes
571 // managed by this manager than it is not a suiable pass for this manager.
572 if (!manageablePass(P))
575 addPassToManager (BP);
580 /// Execute all of the passes scheduled for execution by invoking
581 /// runOnBasicBlock method. Keep track of whether any of the passes modifies
582 /// the function, and if so, return true.
584 BasicBlockPassManager_New::runOnFunction(Function &F) {
586 bool Changed = false;
587 initializeAnalysisInfo();
589 for (Function::iterator I = F.begin(), E = F.end(); I != E; ++I)
590 for (std::vector<Pass *>::iterator itr = passVectorBegin(),
591 e = passVectorEnd(); itr != e; ++itr) {
594 recordAvailableAnalysis(P);
595 BasicBlockPass *BP = dynamic_cast<BasicBlockPass*>(P);
596 Changed |= BP->runOnBasicBlock(*I);
597 removeNotPreservedAnalysis(P);
603 /// Return true IFF AnalysisID AID is currently available.
604 Pass * BasicBlockPassManager_New::getAnalysisPassFromManager(AnalysisID AID) {
605 return getAnalysisPass(AID);
608 //===----------------------------------------------------------------------===//
609 // FunctionPassManager_New implementation
611 /// Create new Function pass manager
612 FunctionPassManager_New::FunctionPassManager_New() {
613 FPM = new FunctionPassManagerImpl_New();
616 /// add - Add a pass to the queue of passes to run. This passes
617 /// ownership of the Pass to the PassManager. When the
618 /// PassManager_X is destroyed, the pass will be destroyed as well, so
619 /// there is no need to delete the pass. (TODO delete passes.)
620 /// This implies that all passes MUST be allocated with 'new'.
621 void FunctionPassManager_New::add(Pass *P) {
625 /// Execute all of the passes scheduled for execution. Keep
626 /// track of whether any of the passes modifies the function, and if
628 bool FunctionPassManager_New::runOnModule(Module &M) {
629 return FPM->runOnModule(M);
632 /// run - Execute all of the passes scheduled for execution. Keep
633 /// track of whether any of the passes modifies the function, and if
636 bool FunctionPassManager_New::run(Function &F) {
638 if (MP->materializeFunction(&F, &errstr)) {
639 cerr << "Error reading bytecode file: " << errstr << "\n";
642 return FPM->runOnFunction(F);
646 /// doInitialization - Run all of the initializers for the function passes.
648 bool FunctionPassManager_New::doInitialization() {
649 return FPM->doInitialization(*MP->getModule());
652 /// doFinalization - Run all of the initializers for the function passes.
654 bool FunctionPassManager_New::doFinalization() {
655 return FPM->doFinalization(*MP->getModule());
658 //===----------------------------------------------------------------------===//
659 // FunctionPassManagerImpl_New implementation
661 /// Add pass P into the pass manager queue. If P is a BasicBlockPass then
662 /// either use it into active basic block pass manager or create new basic
663 /// block pass manager to handle pass P.
665 FunctionPassManagerImpl_New::addPass(Pass *P) {
667 // If P is a BasicBlockPass then use BasicBlockPassManager_New.
668 if (BasicBlockPass *BP = dynamic_cast<BasicBlockPass*>(P)) {
670 if (!activeBBPassManager
671 || !activeBBPassManager->addPass(BP)) {
673 activeBBPassManager = new BasicBlockPassManager_New();
674 addPassToManager(activeBBPassManager, false);
675 if (!activeBBPassManager->addPass(BP))
676 assert(0 && "Unable to add Pass");
681 FunctionPass *FP = dynamic_cast<FunctionPass *>(P);
685 // If this pass does not preserve anlysis that is used by other passes
686 // managed by this manager than it is not a suiable pass for this manager.
687 if (!manageablePass(P))
690 addPassToManager (FP);
691 activeBBPassManager = NULL;
695 /// Execute all of the passes scheduled for execution by invoking
696 /// runOnFunction method. Keep track of whether any of the passes modifies
697 /// the function, and if so, return true.
698 bool FunctionPassManagerImpl_New::runOnModule(Module &M) {
700 bool Changed = false;
701 initializeAnalysisInfo();
703 for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
704 for (std::vector<Pass *>::iterator itr = passVectorBegin(),
705 e = passVectorEnd(); itr != e; ++itr) {
708 recordAvailableAnalysis(P);
709 FunctionPass *FP = dynamic_cast<FunctionPass*>(P);
710 Changed |= FP->runOnFunction(*I);
711 removeNotPreservedAnalysis(P);
717 /// Execute all of the passes scheduled for execution by invoking
718 /// runOnFunction method. Keep track of whether any of the passes modifies
719 /// the function, and if so, return true.
720 bool FunctionPassManagerImpl_New::runOnFunction(Function &F) {
722 bool Changed = false;
723 initializeAnalysisInfo();
725 for (std::vector<Pass *>::iterator itr = passVectorBegin(),
726 e = passVectorEnd(); itr != e; ++itr) {
729 recordAvailableAnalysis(P);
730 FunctionPass *FP = dynamic_cast<FunctionPass*>(P);
731 Changed |= FP->runOnFunction(F);
732 removeNotPreservedAnalysis(P);
739 /// Return true IFF AnalysisID AID is currently available.
740 Pass *FunctionPassManagerImpl_New::getAnalysisPassFromManager(AnalysisID AID) {
742 Pass *P = getAnalysisPass(AID);
746 if (activeBBPassManager &&
747 activeBBPassManager->getAnalysisPass(AID) != 0)
748 return activeBBPassManager->getAnalysisPass(AID);
750 // TODO : Check inactive managers
754 inline bool FunctionPassManagerImpl_New::doInitialization(Module &M) {
755 bool Changed = false;
757 for (std::vector<Pass *>::iterator itr = passVectorBegin(),
758 e = passVectorEnd(); itr != e; ++itr) {
761 FunctionPass *FP = dynamic_cast<FunctionPass*>(P);
762 Changed |= FP->doInitialization(M);
768 inline bool FunctionPassManagerImpl_New::doFinalization(Module &M) {
769 bool Changed = false;
771 for (std::vector<Pass *>::iterator itr = passVectorBegin(),
772 e = passVectorEnd(); itr != e; ++itr) {
775 FunctionPass *FP = dynamic_cast<FunctionPass*>(P);
776 Changed |= FP->doFinalization(M);
783 //===----------------------------------------------------------------------===//
784 // ModulePassManager implementation
786 /// Add P into pass vector if it is manageble. If P is a FunctionPass
787 /// then use FunctionPassManagerImpl_New to manage it. Return false if P
788 /// is not manageable by this manager.
790 ModulePassManager_New::addPass(Pass *P) {
792 // If P is FunctionPass then use function pass maanager.
793 if (FunctionPass *FP = dynamic_cast<FunctionPass*>(P)) {
795 activeFunctionPassManager = NULL;
797 if (!activeFunctionPassManager
798 || !activeFunctionPassManager->addPass(P)) {
800 activeFunctionPassManager = new FunctionPassManagerImpl_New();
801 addPassToManager(activeFunctionPassManager, false);
802 if (!activeFunctionPassManager->addPass(FP))
803 assert(0 && "Unable to add pass");
808 ModulePass *MP = dynamic_cast<ModulePass *>(P);
812 // If this pass does not preserve anlysis that is used by other passes
813 // managed by this manager than it is not a suiable pass for this manager.
814 if (!manageablePass(P))
817 addPassToManager(MP);
818 activeFunctionPassManager = NULL;
823 /// Execute all of the passes scheduled for execution by invoking
824 /// runOnModule method. Keep track of whether any of the passes modifies
825 /// the module, and if so, return true.
827 ModulePassManager_New::runOnModule(Module &M) {
828 bool Changed = false;
829 initializeAnalysisInfo();
831 for (std::vector<Pass *>::iterator itr = passVectorBegin(),
832 e = passVectorEnd(); itr != e; ++itr) {
835 recordAvailableAnalysis(P);
836 ModulePass *MP = dynamic_cast<ModulePass*>(P);
837 Changed |= MP->runOnModule(M);
838 removeNotPreservedAnalysis(P);
844 /// Return true IFF AnalysisID AID is currently available.
845 Pass *ModulePassManager_New::getAnalysisPassFromManager(AnalysisID AID) {
848 Pass *P = getAnalysisPass(AID);
852 if (activeFunctionPassManager &&
853 activeFunctionPassManager->getAnalysisPass(AID) != 0)
854 return activeFunctionPassManager->getAnalysisPass(AID);
856 // TODO : Check inactive managers
860 //===----------------------------------------------------------------------===//
861 // PassManagerImpl implementation
863 /// Return true IFF AnalysisID AID is currently available.
864 Pass *PassManagerImpl_New::getAnalysisPassFromManager(AnalysisID AID) {
867 for (std::vector<ModulePassManager_New *>::iterator itr = PassManagers.begin(),
868 e = PassManagers.end(); !P && itr != e; ++itr)
869 P = (*itr)->getAnalysisPassFromManager(AID);
873 /// Add pass P to the queue of passes to run.
874 void PassManagerImpl_New::add(Pass *P) {
875 // Do not process Analysis now. Analysis is process while scheduling
877 addPassToManager(P, false);
880 // PassManager_New implementation
881 /// Add P into active pass manager or use new module pass manager to
883 bool PassManagerImpl_New::addPass(Pass *P) {
885 if (!activeManager || !activeManager->addPass(P)) {
886 activeManager = new ModulePassManager_New();
887 PassManagers.push_back(activeManager);
890 return activeManager->addPass(P);
893 /// run - Execute all of the passes scheduled for execution. Keep track of
894 /// whether any of the passes modifies the module, and if so, return true.
895 bool PassManagerImpl_New::run(Module &M) {
897 bool Changed = false;
898 for (std::vector<ModulePassManager_New *>::iterator itr = PassManagers.begin(),
899 e = PassManagers.end(); itr != e; ++itr) {
900 ModulePassManager_New *pm = *itr;
901 Changed |= pm->runOnModule(M);
906 //===----------------------------------------------------------------------===//
907 // PassManager implementation
909 /// Create new pass manager
910 PassManager_New::PassManager_New() {
911 PM = new PassManagerImpl_New();
914 /// add - Add a pass to the queue of passes to run. This passes ownership of
915 /// the Pass to the PassManager. When the PassManager is destroyed, the pass
916 /// will be destroyed as well, so there is no need to delete the pass. This
917 /// implies that all passes MUST be allocated with 'new'.
919 PassManager_New::add(Pass *P) {
923 /// run - Execute all of the passes scheduled for execution. Keep track of
924 /// whether any of the passes modifies the module, and if so, return true.
926 PassManager_New::run(Module &M) {