Implement test for CL_KERNEL_PRIVATE_MEM_SIZE (#459) (#1013)

Implement a test to ensure that the CL_KERNEL_PRIVATE_MEM_SIZE
flag for clGetKernelWorkGroupInfo passes.

Change-Id: Ibd6d64d185c00ddbd23467692717c534498bb901
Signed-off-by: Chetankumar Mistry <chetan.mistry@arm.com>

test_conformance/api/test_kernel_private_memory_size.cpp

@@ -0,0 +1,42 @@
+//
+// Copyright (c) 2020 The Khronos Group Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+#include "harness/errorHelpers.h"
+#include "harness/typeWrappers.h"
+#include <iostream>
+#include "procs.h"
+
+int test_kernel_private_memory_size(cl_device_id deviceID, cl_context context,
+                                    cl_command_queue queue, int num_elements)
+{
+    const char* TEST_KERNEL =
+        R"(__kernel void private_memory( __global ulong *buffer ){
+         volatile __private ulong x[1];
+         buffer[0] = x[0];
+         })";
+
+    clProgramWrapper program;
+    clKernelWrapper kernel;
+    cl_int err = create_single_kernel_helper(context, &program, &kernel, 1,
+                                             &kernels[i], "private_memory");
+    test_error(err, "create_single_kernel_helper");
+    cl_ulong size = CL_ULONG_MAX;
+    err = clGetKernelWorkGroupInfo(kernel, deviceID, CL_KERNEL_PRIVATE_MEM_SIZE,
+                                   sizeof(cl_ulong), &size, nullptr);
+
+    test_error(err, "clGetKernelWorkGroupInfo");
+
+    return TEST_PASS;
+}