999     for (MachineBasicBlock *PBB : I->predecessors()) {  in TailMergeBlocks()
1003       if (TriedMerging.count(PBB))  in TailMergeBlocks()
1007       if (PBB == IBB)  in TailMergeBlocks()
1011       if (!UniquePreds.insert(PBB).second)  in TailMergeBlocks()
1015       if (PBB->hasEHPadSuccessor())  in TailMergeBlocks()
1026           if (IBB == ML->getHeader() && ML == MLI->getLoopFor(PBB))  in TailMergeBlocks()
1031       if (!TII->analyzeBranch(*PBB, TBB, FBB, Cond, true)) {  in TailMergeBlocks()
1040             auto Next = ++PBB->getIterator();  in TailMergeBlocks()
1050           MachineFunction::iterator IP = ++PBB->getIterator();  in TailMergeBlocks()
1072           TII->RemoveBranch(*PBB);  in TailMergeBlocks()
1075             TII->InsertBranch(*PBB, (TBB == IBB) ? FBB : TBB, nullptr,  in TailMergeBlocks()
1079         MergePotentials.push_back(MergePotentialsElt(HashEndOfMBB(*PBB), PBB));  in TailMergeBlocks()