962     MachineBasicBlock *IBB = I;  in TailMergeBlocks()  local
973       if (PBB == IBB)  in TailMergeBlocks()
990         if (!Cond.empty() && TBB == IBB) {  in TailMergeBlocks()
1001         if (IBB->isLandingPad()) {  in TailMergeBlocks()
1007             if (IBB != PredNextBB)      // fallthrough  in TailMergeBlocks()
1010             if (TBB != IBB && FBB != IBB)   // cbr then ubr  in TailMergeBlocks()
1013             if (TBB != IBB)               // ubr  in TailMergeBlocks()
1016             if (TBB != IBB && IBB != PredNextBB)  // cbr  in TailMergeBlocks()
1027             TII->InsertBranch(*PBB, (TBB == IBB) ? FBB : TBB, nullptr,  in TailMergeBlocks()
1042       MadeChange |= TryTailMergeBlocks(IBB, PredBB);  in TailMergeBlocks()
1049       FixTail(MergePotentials.begin()->getBlock(), IBB, TII);  in TailMergeBlocks()