1207     auto RootIt = nextInstr(Iter, Uses, Visited);  in validate()  local
1210     while (BaseIt != Uses.end() && RootIt != Uses.end()) {  in validate()
1212       Instruction *RootInst = RootIt->first;  in validate()
1222         LastRootIt = RootIt;  in validate()
1224         RootIt = nextInstr(Iter, Uses, Visited);  in validate()
1240         auto TryIt = RootIt;  in validate()
1249         if (TryIt == Uses.end() || TryIt == RootIt ||  in validate()
1250             instrDependsOn(TryIt->first, RootIt, TryIt)) {  in validate()
1256         RootIt = TryIt;  in validate()
1268       for (; LastRootIt < RootIt; ++LastRootIt) {  in validate()
1287       if (RootIt->second.count() > 1) {  in validate()
1391       LastRootIt = RootIt;  in validate()
1395       RootIt = nextInstr(Iter, Uses, Visited);  in validate()
1397     assert(BaseIt == Uses.end() && RootIt == Uses.end() &&  in validate()