Add test source kernel

Author: sommerlukas

dpctl/tests/test_work_group_memory.py

@@ -30,6 +30,27 @@ def get_spirv_abspath(fn):
     return spirv_file
 
 
+# The kernel in the SPIR-V file used in this test was generated from the
+# following SYCL source code:
+# #include <sycl/sycl.hpp>
+# using namespace sycl;
+# namespace syclexp = sycl::ext::oneapi::experimental;
+# namespace syclext = sycl::ext::oneapi;
+# using data_t = int32_t;
+#
+# extern "C" SYCL_EXTERNAL
+# SYCL_EXT_ONEAPI_FUNCTION_PROPERTY((syclexp::nd_range_kernel<1>))
+# void local_mem_kernel(data_t* in, data_t* out,
+#                           syclexp::work_group_memory<data_t> mem){
+#   auto* local_mem = &mem;
+#   auto item = syclext::this_work_item::get_nd_item<1>();
+#   size_t global_id = item.get_global_linear_id();
+#   size_t local_id = item.get_local_linear_id();
+#   local_mem[local_id] = in[global_id];
+#   out[global_id] = local_mem[local_id];
+# }
+
+
 def test_submit_work_group_memory():
     if not dpctl.experimental.WorkGroupMemory.is_available():
         pytest.skip("Work group memory extension not supported")