Transforms/Scalar/IndVarSimplify.cpp

1223 /// getLoopPhiForCounter - Return the loop header phi IFF IncV adds a loop
1225 static PHINode *getLoopPhiForCounter(Value *IncV, Loop *L, DominatorTree *DT) {
1226   Instruction *IncI = dyn_cast<Instruction>(IncV);
1310   Value *IncV = Phi->getIncomingValue(Idx);
1311   return Phi != getLoopPhiForCounter(IncV, L, DT);
1360   Value *IncV = Phi->getIncomingValue(LatchIdx);
1364     if (*UI != Cond && *UI != IncV) return false;
1367   for (Value::use_iterator UI = IncV->use_begin(), UE = IncV->use_end();
1426     Value *IncV = Phi->getIncomingValue(LatchIdx);
1427     if (getLoopPhiForCounter(IncV, L, DT) != Phi)