1063     auto RootIt = nextInstr(Iter, Uses, Visited);  in validate()  local
1066     while (BaseIt != Uses.end() && RootIt != Uses.end()) {  in validate()
1068       Instruction *RootInst = RootIt->first;  in validate()
1078         LastRootIt = RootIt;  in validate()
1080         RootIt = nextInstr(Iter, Uses, Visited);  in validate()
1096         auto TryIt = RootIt;  in validate()
1105         if (TryIt == Uses.end() || TryIt == RootIt ||  in validate()
1106             instrDependsOn(TryIt->first, RootIt, TryIt)) {  in validate()
1112         RootIt = TryIt;  in validate()
1124       for (; LastRootIt < RootIt; ++LastRootIt) {  in validate()
1143       if (RootIt->second.count() > 1) {  in validate()
1244       LastRootIt = RootIt;  in validate()
1248       RootIt = nextInstr(Iter, Uses, Visited);  in validate()
1250     assert (BaseIt == Uses.end() && RootIt == Uses.end() &&  in validate()