decomposed_partitioned_call_callees) {
  OpBuilder builder(while_op);
  auto modify_region_arguments = [&](Region& region) {
    int64_t original_arg_count = region.getNumArguments();
    for (int64_t i = 0; i < original_arg_count; ++i) {
      auto operand = while_op.getOperand(i);
      auto it = buffer_to_size->find(operand);
      if (it == buffer_to_size->end()) continue;