Lines Matching defs:PrevBB

935   MachineBasicBlock *PrevBB = ForcedLayoutPred;
936   if (!PrevBB)
937     PrevBB = &*std::prev(TailBB->getIterator());
940   // This has to check PrevBB->succ_size() because EH edges are ignored by
942   if (PrevBB->succ_size() == 1 &&
944       *PrevBB->succ_begin() == TailBB &&
945       !TII->analyzeBranch(*PrevBB, PriorTBB, PriorFBB, PriorCond) &&
950     LLVM_DEBUG(dbgs() << "\nMerging into block: " << *PrevBB
955     bool RemovedBranches = TII->removeBranch(*PrevBB) != 0;
958     if (PrevBB->getFirstTerminator() == PrevBB->end()) {
968           processPHI(MI, TailBB, PrevBB, LocalVRMap, CopyInfos, UsedByPhi,
978           duplicateInstruction(MI, TailBB, PrevBB, LocalVRMap, UsedByPhi);
981         appendCopies(PrevBB, CopyInfos, Copies);
983         TII->removeBranch(*PrevBB);
985         PrevBB->splice(PrevBB->end(), TailBB, TailBB->begin(), TailBB->end());
987       PrevBB->removeSuccessor(PrevBB->succ_begin());
988       assert(PrevBB->succ_empty());
989       PrevBB->transferSuccessors(TailBB);
991       // Update branches in PrevBB based on Tail's layout successor.
993         PrevBB->updateTerminator(TailBB->getNextNode());
995       TDBBs.push_back(PrevBB);