[WIP] Add test

Author: Fznamznon

clang/test/CodeGenSYCL/free_function_default_template_arguments.cpp

@@ -0,0 +1,35 @@
+// RUN: %clang_cc1 -fsycl-is-device -internal-isystem %S/Inputs -triple spir64-unknown-unknown -sycl-std=2020 -fsycl-int-header=%t.h %s
+// RUN: FileCheck -input-file=%t.h %s
+
+// This test checks integration header contents free functions kernels in
+// presense of template arguments.
+
+#include "mock_properties.hpp"
+#include "sycl.hpp"
+
+namespace ns {
+
+struct notatuple {
+  int a;
+};
+
+template <typename T, typename = int, int a = 12, typename = notatuple, typename ...TS> struct Arg {
+  T val;
+};
+
+[[__sycl_detail__::add_ir_attributes_function("sycl-single-task-kernel",
+                                              2)]] void
+simple(Arg<char>){
+}
+
+}
+
+
+template <typename T>
+[[__sycl_detail__::add_ir_attributes_function("sycl-nd-range-kernel", 2)]] void
+templated(ns::Arg<T, float, 3>, T end) {
+}
+
+template void templated(ns::Arg<int, float, 3>, int);
+
+using namespace ns;