[SYCL][CUDA] cl_khr_fp16 extension connected to cuda PI. (intel#4029)

This change ensures that the fp16 Reduction test case runs for the cuda backend.
The test fp16-with-unnamed-lambda.cpp has been deleted because it has a duplicate in the test suite (in the dir SYCL/Regression).
In both cases the triple is missing on the first line which needs to be added to the llvm-test-suite copy to avoid a test failure now that the test is not skipped for the cuda backend.

Signed-off-by: JackAKirk <[email protected]>

Author: JackAKirk

sycl/plugins/cuda/pi_cuda.cpp

@@ -1378,6 +1378,22 @@ pi_result cuda_piDeviceGetInfo(pi_device device, pi_device_info param_name,
 
     std::string SupportedExtensions = "cl_khr_fp64 ";
 
+    int major = 0;
+    int minor = 0;
+
+    cl::sycl::detail::pi::assertion(
+        cuDeviceGetAttribute(&major,
+                             CU_DEVICE_ATTRIBUTE_COMPUTE_CAPABILITY_MAJOR,
+                             device->get()) == CUDA_SUCCESS);
+    cl::sycl::detail::pi::assertion(
+        cuDeviceGetAttribute(&minor,
+                             CU_DEVICE_ATTRIBUTE_COMPUTE_CAPABILITY_MINOR,
+                             device->get()) == CUDA_SUCCESS);
+
+    if ((major >= 6) || ((major == 5) && (minor >= 3))) {
+      SupportedExtensions += "cl_khr_fp16 ";
+    }
+
     return getInfo(param_value_size, param_value, param_value_size_ret,
                    SupportedExtensions.c_str());
   }