DenseIntElementsAttr sparse_begin_attr, sparse_end_attr;
    if (!matchPattern(op.getBegin(), m_Constant(&sparse_begin_attr)) ||
        !matchPattern(op.getEnd(), m_Constant(&sparse_end_attr))) {
      return rewriteWithUnknownBegin(op, input_ty, result_ty, rewriter);
    }

    SmallVector<int64_t, 4> begin_indices, end_indices, strides;