[SYCL] Add a test with reduction kernel accepting sycl::item (#1403)

Complementary to intel/llvm#7478.

Author: aelovikov-intel

SYCL/Reduction/reduction_range_item.cpp

@@ -0,0 +1,52 @@
+// RUN: %clangxx -fsycl -fsycl-targets=%sycl_triple %s -o %t.out
+// RUN: %CPU_RUN_PLACEHOLDER %t.out
+// RUN: %GPU_RUN_PLACEHOLDER %t.out
+// RUN: %ACC_RUN_PLACEHOLDER %t.out
+
+#include <sycl/sycl.hpp>
+
+using namespace sycl;
+
+int main() {
+  queue q;
+  auto *RedMem = malloc_shared<int>(1, q);
+  auto *Success = malloc_shared<bool>(1, q);
+  *Success = true;
+
+  *RedMem = 0;
+  q.parallel_for(range<1>{7}, reduction(RedMem, std::plus<int>{}),
+                 [=](item<1> Item, auto &Red) {
+                   Red += 1;
+                   if (Item.get_range(0) != 7)
+                     *Success = false;
+                   if (Item.get_id(0) == 7)
+                     *Success = false;
+                 })
+      .wait();
+
+  assert(*RedMem == 7);
+  assert(*Success);
+
+  *RedMem = 0;
+  q.parallel_for(range<2>{1030, 7}, reduction(RedMem, std::plus<int>{}),
+                 [=](item<2> Item, auto &Red) {
+                   Red += 1;
+                   if (Item.get_range(0) != 1030)
+                     *Success = false;
+                   if (Item.get_range(1) != 7)
+                     *Success = false;
+
+                   if (Item.get_id(0) == 1030)
+                     *Success = false;
+                   if (Item.get_id(1) == 7)
+                     *Success = false;
+                 })
+      .wait();
+
+  assert(*RedMem == 1030 * 7);
+  assert(*Success);
+
+  free(RedMem, q);
+  free(Success, q);
+  return 0;
+}