144       for (auto *Succ : MBB->successors()) {  in calculate()  local
145         if (Succ != Entry && inRegion(Succ)) {  in calculate()
146           Reachable[MBB].insert(Succ);  in calculate()
147           WorkList.emplace_back(MBB, Succ);  in calculate()
153       MachineBasicBlock *MBB, *Succ;  in calculate()  local
154       std::tie(MBB, Succ) = WorkList.pop_back_val();  in calculate()
155       assert(inRegion(MBB) && Succ != Entry && inRegion(Succ));  in calculate()
160           if (Reachable[Pred].insert(Succ).second) {  in calculate()
161             WorkList.emplace_back(Pred, Succ);  in calculate()
469     for (auto *Succ : Pred->successors()) {  in makeSingleEntryLoop()  local
470       if (!Entries.count(Succ))  in makeSingleEntryLoop()
472       auto *Routing = Map[{Succ, PredInLoop}];  in makeSingleEntryLoop()
473       Pred->replaceSuccessor(Succ, Routing);  in makeSingleEntryLoop()