34   Reduction reduction = Reduce(node);  in Reduce()  local
35   if (V8_UNLIKELY(observe_node_manager && reduction.Changed())) {  in Reduce()
37                                         reduction.replacement());  in Reduce()
39   return reduction;  in Reduce()
105       Reduction reduction = (*i)->Reduce(node, observe_node_manager_);  in Reduce()  local
106       if (!reduction.Changed()) {  in Reduce()
108       } else if (reduction.replacement() == node) {  in Reduce()
131                          << *(reduction.replacement()) << " by reducer "  in Reduce()
134         return reduction;  in Reduce()
178   Reduction reduction = Reduce(node);  in ReduceTop()  local
181   if (!reduction.Changed()) return Pop();  in ReduceTop()
184   Node* const replacement = reduction.replacement();  in ReduceTop()