[SYCL] Add one more optional kernel features test (#1582)

Author: AlexeySachkov

SYCL/OptionalKernelFeatures/no-speculative-compilation.cpp

@@ -0,0 +1,56 @@
+// 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
+//
+// This test intends to check that no speculative compilation is happening,
+// i.e. there are no exceptions thrown about aspects fp16 or fp64 being
+// unsuppored on device.
+
+#include <sycl/sycl.hpp>
+
+void foo(sycl::half &value) { value += sycl::half(1.0f); }
+
+void foo(double &value) { value += 2.0; }
+
+void foo(float &value) { value += 3.0f; }
+
+int main() {
+  sycl::queue q;
+
+  sycl::half h = 0.0f;
+  double d = 0.0;
+  float f = 0.0f;
+
+  sycl::buffer<sycl::half> buf_half(&h, sycl::range{1});
+  sycl::buffer<double> buf_double(&d, sycl::range{1});
+  sycl::buffer<float> buf_float(&f, sycl::range{1});
+
+  if (q.get_device().has(sycl::aspect::fp16)) {
+    q.submit([&](sycl::handler &cgh) {
+       auto acc = buf_half.get_access(cgh);
+       cgh.single_task([=] { foo(acc[0]); });
+     }).wait();
+
+    auto host_acc = buf_half.get_host_access();
+    assert(host_acc[0] == 1.0f);
+  } else if (q.get_device().has(sycl::aspect::fp64)) {
+    q.submit([&](sycl::handler &cgh) {
+       auto acc = buf_double.get_access(cgh);
+       cgh.single_task([=] { foo(acc[0]); });
+     }).wait();
+
+    auto host_acc = buf_double.get_host_access();
+    assert(host_acc[0] == 2.0f);
+  } else {
+    q.submit([&](sycl::handler &cgh) {
+       auto acc = buf_float.get_access(cgh);
+       cgh.single_task([=] { foo(acc[0]); });
+     }).wait();
+
+    auto host_acc = buf_float.get_host_access();
+    assert(host_acc[0] == 3.0f);
+  }
+
+  return 0;
+}