<< ", and block_size " << block_size;

      if (!crops_values.empty()) {
        // output spatial dim = input spatial dim * block_size - crops.
        int64_t crop_a = crops_values[2 * (spatial_dim_index - 1)];
        int64_t crop_b = crops_values[2 * (spatial_dim_index - 1) + 1];
        if (output_dim != input_dim_pad - crop_a - crop_b)
          return op.emitOpError()