Expand test case and add comments

Author: schittir

clang/test/CodeGenSYCL/accessor_no_alias_property.cpp

@@ -1,6 +1,10 @@
 // RUN: %clang_cc1 -fsycl-is-device -triple spir64-unknown-unknown-sycldevice -emit-llvm %s -o - | FileCheck %s
+// check that noalias parameter attribute is emitted when no_alias accessor property is used
+// CHECK: define {{.*}}spir_kernel void @_ZTSZ4mainE16kernel_function1({{.*}} noalias {{.*}} %_arg_, {{.*}})
 
-// CHECK: define {{.*}}spir_kernel void @_ZTSZ4mainE15kernel_function({{.*}} noalias {{.*}} %_arg_, {{.*}})
+// check that noalias parameter attribute is NOT emitted when it is not used
+// CHECK: define {{.*}}spir_kernel void @_ZTSZ4mainE16kernel_function2{{.*}} !kernel_arg_buffer_location
+// CHECK-NOT: define {{.*}}spir_kernel void @_ZTSZ4mainE16kernel_function2({{.*}} noalias {{.*}}
 
 #include "Inputs/sycl.hpp"
 
@@ -11,9 +15,22 @@ int main() {
                      cl::sycl::ONEAPI::accessor_property_list<
                          cl::sycl::ONEAPI::property::no_alias::instance<true>>>
       accessorA;
-  cl::sycl::kernel_single_task<class kernel_function>(
+
+  cl::sycl::accessor<int, 1, cl::sycl::access::mode::read_write,
+                     cl::sycl::access::target::global_buffer,
+                     cl::sycl::access::placeholder::false_t,
+                     cl::sycl::ONEAPI::accessor_property_list<
+                         cl::sycl::INTEL::property::buffer_location::instance<1>>>
+      accessorB;
+
+  cl::sycl::kernel_single_task<class kernel_function1>(
       [=]() {
         accessorA.use();
       });
+
+  cl::sycl::kernel_single_task<class kernel_function2>(
+      [=]() {
+        accessorB.use();
+      });
   return 0;
 }