750   MachineBasicBlock *PDom = nullptr;  in isProfitableToTailDup()  local
772     if (PDom == nullptr)  in isProfitableToTailDup()
774         PDom = SuccSucc;  in isProfitableToTailDup()
812   if (PDom == nullptr || !Succ->isSuccessor(PDom)) {  in isProfitableToTailDup()
822   BranchProbability UProb = MBPI->getEdgeProbability(Succ, PDom);  in isProfitableToTailDup()
857       !hasBetterLayoutPredecessor(Succ, PDom, *BlockToChain[PDom], UProb, UProb,  in isProfitableToTailDup()
1163     MachineBasicBlock *PDom = nullptr;  in precomputeTriangleChains()  local
1167       PDom = Succ;  in precomputeTriangleChains()
1172     if (PDom == nullptr)  in precomputeTriangleChains()
1175     if (MBPI->getEdgeProbability(&BB, PDom) < BranchProbability(50, 100))  in precomputeTriangleChains()
1179     if (!shouldTailDuplicate(PDom))  in precomputeTriangleChains()
1184     for (MachineBasicBlock* Pred : PDom->predecessors()) {  in precomputeTriangleChains()
1187       if (!TailDup.canTailDuplicate(PDom, Pred)) {  in precomputeTriangleChains()
1207       Chain.append(PDom);  in precomputeTriangleChains()
1210       auto InsertResult = TriangleChainMap.try_emplace(PDom, &BB, PDom);  in precomputeTriangleChains()