1245     auto RootIt = nextInstr(Iter, Uses, Visited);  in validate()  local
1248     while (BaseIt != Uses.end() && RootIt != Uses.end()) {  in validate()
1250       Instruction *RootInst = RootIt->first;  in validate()
1260         LastRootIt = RootIt;  in validate()
1262         RootIt = nextInstr(Iter, Uses, Visited);  in validate()
1278         auto TryIt = RootIt;  in validate()
1287         if (TryIt == Uses.end() || TryIt == RootIt ||  in validate()
1288             instrDependsOn(TryIt->first, RootIt, TryIt)) {  in validate()
1294         RootIt = TryIt;  in validate()
1306       for (; LastRootIt < RootIt; ++LastRootIt) {  in validate()
1325       if (RootIt->second.count() > 1) {  in validate()
1428       LastRootIt = RootIt;  in validate()
1432       RootIt = nextInstr(Iter, Uses, Visited);  in validate()
1434     assert(BaseIt == Uses.end() && RootIt == Uses.end() &&  in validate()