// Check if this pass is suitable for the current LPPassManager, if // available. This pass P is not suitable for a LPPassManager if P // is not preserving higher level analysis info used by other // LPPassManager passes. In such case, pop LPPassManager from the // stack. This will force assignPassManager() to create new // LPPassManger as expected. void LoopPass::preparePassManager(PMStack &PMS) { // Find LPPassManager while (!PMS.empty() && PMS.top()->getPassManagerType() > PMT_LoopPassManager) PMS.pop(); // If this pass is destroying high level information that is used // by other passes that are managed by LPM then do not insert // this pass in current LPM. Use new LPPassManager. if (PMS.top()->getPassManagerType() == PMT_LoopPassManager && !PMS.top()->preserveHigherLevelAnalysis(this)) PMS.pop(); }
/// Assign pass manager to manage this pass. void LoopPass::assignPassManager(PMStack &PMS, PassManagerType PreferredType) { // Find LPPassManager while (!PMS.empty() && PMS.top()->getPassManagerType() > PMT_LoopPassManager) PMS.pop(); LPPassManager *LPPM; if (PMS.top()->getPassManagerType() == PMT_LoopPassManager) LPPM = (LPPassManager*)PMS.top(); else { // Create new Loop Pass Manager if it does not exist. assert (!PMS.empty() && "Unable to create Loop Pass Manager"); PMDataManager *PMD = PMS.top(); // [1] Create new Loop Pass Manager LPPM = new LPPassManager(); LPPM->populateInheritedAnalysis(PMS); // [2] Set up new manager's top level manager PMTopLevelManager *TPM = PMD->getTopLevelManager(); TPM->addIndirectPassManager(LPPM); // [3] Assign manager to manage this new manager. This may create // and push new managers into PMS Pass *P = LPPM->getAsPass(); TPM->schedulePass(P); // [4] Push new manager into PMS PMS.push(LPPM); } LPPM->add(this); }
/// Assign pass manager to manage this pass. void CallGraphSCCPass::assignPassManager(PMStack &PMS, PassManagerType PreferredType) { // Find CGPassManager while (!PMS.empty() && PMS.top()->getPassManagerType() > PMT_CallGraphPassManager) PMS.pop(); assert (!PMS.empty() && "Unable to handle Call Graph Pass"); CGPassManager *CGP = dynamic_cast<CGPassManager *>(PMS.top()); // Create new Call Graph SCC Pass Manager if it does not exist. if (!CGP) { assert (!PMS.empty() && "Unable to create Call Graph Pass Manager"); PMDataManager *PMD = PMS.top(); // [1] Create new Call Graph Pass Manager CGP = new CGPassManager(PMD->getDepth() + 1); // [2] Set up new manager's top level manager PMTopLevelManager *TPM = PMD->getTopLevelManager(); TPM->addIndirectPassManager(CGP); // [3] Assign manager to manage this new manager. This may create // and push new managers into PMS Pass *P = dynamic_cast<Pass *>(CGP); TPM->schedulePass(P); // [4] Push new manager into PMS PMS.push(CGP); } CGP->add(this); }