[SYCL][Test] Add test case for using sycl namespace

Signed-off-by: Alexey Bader <[email protected]>
Co-authored-by: Vlad Romoanov <[email protected]>

Author: bader

sycl/test/basic_tests/sycl-namespace.cpp

@@ -0,0 +1,20 @@
+// RUN: %clangxx -fsycl %s -o %t.out
+// RUN: env SYCL_DEVICE_TYPE=HOST %t.out
+// RUN: %CPU_RUN_PLACEHOLDER %t.out
+// RUN: %GPU_RUN_PLACEHOLDER %t.out
+// RUN: %ACC_RUN_PLACEHOLDER %t.out
+
+#include <CL/sycl.hpp>
+
+int main() {
+  ::sycl::queue q;
+  int r = 0;
+  {
+    sycl::buffer<int, 1> b(&r, 1);
+    q.submit([&](sycl::handler &h) {
+      auto a = b.get_access<sycl::access::mode::write>(h);
+      h.single_task<class T>([=]() { a[0] = 42; });
+    });
+  }
+  return r - 42;
+}