825   MachineBasicBlock *PDom = nullptr;  in isProfitableToTailDup()  local
847     if (PDom == nullptr)  in isProfitableToTailDup()
849         PDom = SuccSucc;  in isProfitableToTailDup()
887   if (PDom == nullptr || !Succ->isSuccessor(PDom)) {  in isProfitableToTailDup()
897   BranchProbability UProb = MBPI->getEdgeProbability(Succ, PDom);  in isProfitableToTailDup()
932       !hasBetterLayoutPredecessor(Succ, PDom, *BlockToChain[PDom], UProb, UProb,  in isProfitableToTailDup()
1286     MachineBasicBlock *PDom = nullptr;  in precomputeTriangleChains()  local
1290       PDom = Succ;  in precomputeTriangleChains()
1295     if (PDom == nullptr)  in precomputeTriangleChains()
1298     if (MBPI->getEdgeProbability(&BB, PDom) < BranchProbability(50, 100))  in precomputeTriangleChains()
1302     if (!shouldTailDuplicate(PDom))  in precomputeTriangleChains()
1307     for (MachineBasicBlock* Pred : PDom->predecessors()) {  in precomputeTriangleChains()
1310       if (!TailDup.canTailDuplicate(PDom, Pred)) {  in precomputeTriangleChains()
1330       Chain.append(PDom);  in precomputeTriangleChains()
1333       auto InsertResult = TriangleChainMap.try_emplace(PDom, &BB, PDom);  in precomputeTriangleChains()