347   MoveMap move_map(local_zone());  in OptimizeMerge()  local
362       auto res = move_map.insert(std::make_pair(key, 1));  in OptimizeMerge()
371   if (move_map.empty() || correct_counts == 0) return;  in OptimizeMerge()
376   if (correct_counts != move_map.size()) {  in OptimizeMerge()
380     for (auto iter = move_map.begin(), end = move_map.end(); iter != end;) {  in OptimizeMerge()
390         move_map.erase(current);  in OptimizeMerge()
399       for (auto iter = move_map.begin(), end = move_map.end(); iter != end;) {  in OptimizeMerge()
406           move_map.erase(current);  in OptimizeMerge()
413   if (move_map.empty()) return;  in OptimizeMerge()
432       auto it = move_map.find(key);  in OptimizeMerge()
433       if (it != move_map.end()) {  in OptimizeMerge()