[SYCL] Add test to check correct diagnostics for invalid wgsize (#1611)

Add tests for new improved diagnostics introduced in intel/llvm#8378.

Author: maarquitos14

SYCL/Basic/gpu_max_wgs_error.cpp

@@ -0,0 +1,39 @@
+// RUN: %clangxx -fsycl -fsycl-targets=%sycl_triple %s -o %t.out -fno-sycl-id-queries-fit-in-int
+// RUN: %GPU_RUN_PLACEHOLDER %t.out
+
+#include <numeric>
+#include <sycl/sycl.hpp>
+
+using namespace sycl;
+
+const std::string expected_msg =
+    "Total number of work-items in a work-group cannot exceed";
+
+template <int N>
+void check(range<N> global, range<N> local, bool expect_fail = false) {
+  queue q;
+  try {
+    q.submit([&](handler &cgh) {
+      cgh.parallel_for(nd_range<N>(global, local), [=](nd_item<N> item) {});
+    });
+    assert(!expect_fail && "Exception expected");
+  } catch (nd_range_error e) {
+    if (expect_fail) {
+      std::string msg = e.what();
+      assert(msg.rfind(expected_msg, 0) == 0 && "Unexpected error message");
+    } else {
+      throw e;
+    }
+  }
+}
+
+int main() {
+  queue q;
+  device d = q.get_device();
+  id<2> max_2 = d.get_info<sycl::info::device::max_work_item_sizes<2>>();
+  check(range<2>(max_2[0], max_2[1]), range<2>(max_2[0], max_2[1]), true);
+
+  id<3> max_3 = d.get_info<sycl::info::device::max_work_item_sizes<3>>();
+  check(range<3>(max_3[0], max_3[1], max_3[2]),
+        range<3>(max_3[0], max_3[1], max_3[2]), true);
+}