op.getLoc(), output_type, init,
        GetI64ElementsAttr(output_shape, &rewriter));

    // Parameters for the generated scatter op.
    SmallVector<int64_t, 1> inserted_window_dims(1, 0);
    SmallVector<int64_t, 1> scatter_dims_to_operand_dims(1, 0);
    int64_t index_vector_dim = segment_ids_rank;

    // Put all parameters in a StructAttr.