672   SUnit *DstBest = nullptr;  in isBestZeroLatency()  local
676     DstBest = getZeroLatency(Src, Src->Succs);  in isBestZeroLatency()
677     if (DstBest == nullptr || Dst->NodeNum <= DstBest->NodeNum)  in isBestZeroLatency()
685   if ((Src == SrcBest && Dst == DstBest ) ||  in isBestZeroLatency()
686       (SrcBest == nullptr && Dst == DstBest) ||  in isBestZeroLatency()
698   if (DstBest != nullptr) {  in isBestZeroLatency()
700       changeLatency(Src, DstBest, 1);  in isBestZeroLatency()
702       restoreLatency(Src, DstBest);  in isBestZeroLatency()
707   if (SrcBest && DstBest)  in isBestZeroLatency()
710     changeLatency(SrcBest, DstBest, 0);  in isBestZeroLatency()
711   else if (DstBest) {  in isBestZeroLatency()
715     for (auto &I : DstBest->Preds)  in isBestZeroLatency()
717           isBestZeroLatency(I.getSUnit(), DstBest, TII, ExclSrc, ExclDst))  in isBestZeroLatency()
718         changeLatency(I.getSUnit(), DstBest, 0);  in isBestZeroLatency()