if (auto dim = get_const_int(operand, /*expected_rank=*/0)) {
      packed_dims.push_back(*dim);
    } else {
      return {};
    }
  }

  // Slice exactly the first shape dimension:
  //   begin = [0] end = [1], strides = [1]
  auto begin = get_const_int(slice_op.getBegin(), /*expected_rank=*/1);
  auto end = get_const_int(slice_op.getEnd(), /*expected_rank=*/1);