1212     auto RootIt = nextInstr(Iter, Uses, Visited);  in validate()  local
1215     while (BaseIt != Uses.end() && RootIt != Uses.end()) {  in validate()
1217       Instruction *RootInst = RootIt->first;  in validate()
1227         LastRootIt = RootIt;  in validate()
1229         RootIt = nextInstr(Iter, Uses, Visited);  in validate()
1245         auto TryIt = RootIt;  in validate()
1254         if (TryIt == Uses.end() || TryIt == RootIt ||  in validate()
1255             instrDependsOn(TryIt->first, RootIt, TryIt)) {  in validate()
1261         RootIt = TryIt;  in validate()
1273       for (; LastRootIt < RootIt; ++LastRootIt) {  in validate()
1292       if (RootIt->second.count() > 1) {  in validate()
1395       LastRootIt = RootIt;  in validate()
1399       RootIt = nextInstr(Iter, Uses, Visited);  in validate()
1401     assert(BaseIt == Uses.end() && RootIt == Uses.end() &&  in validate()