913 void ScheduleDAGRRList::BacktrackBottomUp(SUnit *SU, SUnit *BtSU) {  in BacktrackBottomUp()  argument
921     if (OldSU == BtSU)  in BacktrackBottomUp()
1409     SUnit *BtSU = nullptr;  in PickNodeToScheduleBottomUp()  local
1414         BtSU = LiveRegGens[Reg];  in PickNodeToScheduleBottomUp()
1415         LiveCycle = BtSU->getHeight();  in PickNodeToScheduleBottomUp()
1418     if (!WillCreateCycle(TrySU, BtSU))  {  in PickNodeToScheduleBottomUp()
1420       BacktrackBottomUp(TrySU, BtSU);  in PickNodeToScheduleBottomUp()
1424       if (BtSU->isAvailable) {  in PickNodeToScheduleBottomUp()
1425         BtSU->isAvailable = false;  in PickNodeToScheduleBottomUp()
1426         if (!BtSU->isPending)  in PickNodeToScheduleBottomUp()
1427           AvailableQueue->remove(BtSU);  in PickNodeToScheduleBottomUp()
1429       DEBUG(dbgs() << "ARTIFICIAL edge from SU(" << BtSU->NodeNum << ") to SU("  in PickNodeToScheduleBottomUp()
1431       AddPred(TrySU, SDep(BtSU, SDep::Artificial));  in PickNodeToScheduleBottomUp()