Transforms/Utils/LCSSA.cpp

189     if (PHINode *PN = dyn_cast<PHINode>(U))
190       UserBB = PN->getIncomingBlock(UI);
226     PHINode *PN = PHINode::Create(Inst->getType(),
233       PN->addIncoming(Inst, *PI);
240           &PN->getOperandUse(
241             PN->getOperandNumForIncomingValue(PN->getNumIncomingValues()-1)));
244     AddedPHIs.push_back(PN);
247     SSAUpdate.AddAvailableValue(ExitBB, PN);
259     if (PHINode *PN = dyn_cast<PHINode>(User))
260       UserBB = PN->getIncomingBlock(*UsesToRewrite[i]);