Fix "loop not vectorized" warning when running with newer icpx compil…

…er (#2818)

Co-authored-by: Anatoly Volkov <117643568+avolkov-intel@users.noreply.github.com>

cpp/oneapi/dal/table/backend/csr_kernels.cpp

@@ -14,6 +14,7 @@
 * limitations under the License.
 *******************************************************************************/
 
+#include "oneapi/dal/backend/common.hpp"
 #include "oneapi/dal/table/backend/csr_kernels.hpp"
 #include "oneapi/dal/table/backend/convert.hpp"
 
@@ -411,6 +412,12 @@ bool is_sorted(sycl::queue& queue,
 
     sycl::buffer<std::int64_t, 1> count_buf(&count_descending_pairs, sycl::range<1>(1));
 
+    const auto count_m1 = count - 1LL;
+    const auto wg_size = dal::backend::device_max_wg_size(queue);
+    const size_t count_m1_unsigned = static_cast<size_t>(count_m1);
+
+    const size_t wg_count = (count_m1 + wg_size - 1) / wg_size;
+
     // count the number of pairs of the subsequent elements in the data array that are sorted
     // in desccending order using sycl::reduction
     queue
@@ -419,10 +426,11 @@ bool is_sorted(sycl::queue& queue,
             auto count_descending_reduction =
                 sycl::reduction(count_buf, cgh, sycl::ext::oneapi::plus<std::int64_t>());
 
-            cgh.parallel_for(sycl::range<1>{ dal::detail::integral_cast<std::size_t>(count - 1) },
+            cgh.parallel_for(sycl::nd_range<1>{ wg_count * wg_size, wg_size },
                              count_descending_reduction,
-                             [=](sycl::id<1> i, auto& count_descending) {
-                                 if (data[i] > data[i + 1])
+                             [=](sycl::nd_item<1> idx, auto& count_descending) {
+                                 const auto i = idx.get_global_id(0);
+                                 if (i < count_m1_unsigned && data[i + 1] < data[i])
                                      count_descending.combine(1);
                              });
         })