1240     auto RootIt = nextInstr(Iter, Uses, Visited);  in validate()  local
1243     while (BaseIt != Uses.end() && RootIt != Uses.end()) {  in validate()
1245       Instruction *RootInst = RootIt->first;  in validate()
1255         LastRootIt = RootIt;  in validate()
1257         RootIt = nextInstr(Iter, Uses, Visited);  in validate()
1273         auto TryIt = RootIt;  in validate()
1282         if (TryIt == Uses.end() || TryIt == RootIt ||  in validate()
1283             instrDependsOn(TryIt->first, RootIt, TryIt)) {  in validate()
1289         RootIt = TryIt;  in validate()
1301       for (; LastRootIt < RootIt; ++LastRootIt) {  in validate()
1320       if (RootIt->second.count() > 1) {  in validate()
1423       LastRootIt = RootIt;  in validate()
1427       RootIt = nextInstr(Iter, Uses, Visited);  in validate()
1429     assert(BaseIt == Uses.end() && RootIt == Uses.end() &&  in validate()