155   MachineBasicBlock *PredMBB = *MBB->pred_begin();  in knownRegValInBlock()  local
156   assert(PredMBB == CondBr.getParent() &&  in knownRegValInBlock()
158   if (CondBr == PredMBB->begin())  in knownRegValInBlock()
168   for (MachineInstr &PredI : make_range(std::next(RIt), PredMBB->rend())) {  in knownRegValInBlock()
286   MachineBasicBlock *PredMBB = *MBB->pred_begin();  in optimizeBlock()  local
287   if (PredMBB->succ_size() != 2)  in optimizeBlock()
290   MachineBasicBlock::iterator CondBr = PredMBB->getLastNonDebugInstr();  in optimizeBlock()
291   if (CondBr == PredMBB->end())  in optimizeBlock()
351       if (PredI == PredMBB->begin())  in optimizeBlock()
364   } while (Itr != PredMBB->begin() && Itr->isTerminator());  in optimizeBlock()
467   for (MachineInstr &MMI : make_range(FirstUse, PredMBB->end()))  in optimizeBlock()