Transforms/Utils/SimplifyCFG.cpp

1525     // Skip PHIs which are trivial.
1548   // If there are no PHIs to process, bail early. This helps ensure idempotence
1581     // Skip PHIs which are trivial.
1775   // we ran out of PHIs then we simplified them all.
1779   // Don't fold i1 branches on PHIs which contain binary operators.  These can
2083     SmallVector<PHINode*, 4> PHIs;
2088          !isProfitableToFoldUnconditional(BI, PBI, Cond, PHIs)))
2240       for (unsigned i = 0, e = PHIs.size(); i != e; ++i) {
2242           PHIs[i]->getIncomingValueForBlock(PBI->getParent()));
2280         PHIs[i]->setIncomingValue(PHIs[i]->getBasicBlockIndex(PBI->getParent()),
2478   // it.  If it has PHIs though, the PHIs may have different
2647   // If the block has any PHIs in it or the icmp has multiple uses, it is too
3729   SmallVector<PHINode*, 4> PHIs;
3748         PHIs.push_back(I->first);
3789   for (size_t I = 0, E = PHIs.size(); I != E; ++I) {
3790     PHINode *PHI = PHIs[I];