1215     auto RootIt = nextInstr(Iter, Uses, Visited);  in validate()  local
1218     while (BaseIt != Uses.end() && RootIt != Uses.end()) {  in validate()
1220       Instruction *RootInst = RootIt->first;  in validate()
1230         LastRootIt = RootIt;  in validate()
1232         RootIt = nextInstr(Iter, Uses, Visited);  in validate()
1248         auto TryIt = RootIt;  in validate()
1257         if (TryIt == Uses.end() || TryIt == RootIt ||  in validate()
1258             instrDependsOn(TryIt->first, RootIt, TryIt)) {  in validate()
1264         RootIt = TryIt;  in validate()
1276       for (; LastRootIt < RootIt; ++LastRootIt) {  in validate()
1295       if (RootIt->second.count() > 1) {  in validate()
1396       LastRootIt = RootIt;  in validate()
1400       RootIt = nextInstr(Iter, Uses, Visited);  in validate()
1402     assert (BaseIt == Uses.end() && RootIt == Uses.end() &&  in validate()