[Clang] Fix gpuintrin_lang test for OpenCL

Author: jhuber6

clang/lib/Headers/amdgpuintrin.h

@@ -160,14 +160,14 @@ __gpu_shuffle_idx_u64(uint64_t __lane_mask, uint32_t __idx, uint64_t __x) {
 
 // Returns true if the flat pointer points to CUDA 'shared' memory.
 _DEFAULT_FN_ATTRS static __inline__ bool __gpu_is_ptr_local(void *ptr) {
-  return __builtin_amdgcn_is_shared(
-      (void __attribute__((address_space(0))) *)((void __gpu_generic *)ptr));
+  return __builtin_amdgcn_is_shared((void __attribute__((address_space(0))) *)((
+      void [[clang::opencl_generic]] *)ptr));
 }
 
 // Returns true if the flat pointer points to CUDA 'local' memory.
 _DEFAULT_FN_ATTRS static __inline__ bool __gpu_is_ptr_private(void *ptr) {
-  return __builtin_amdgcn_is_private(
-      (void __attribute__((address_space(0))) *)((void __gpu_generic *)ptr));
+  return __builtin_amdgcn_is_private((void __attribute__((
+      address_space(0))) *)((void [[clang::opencl_generic]] *)ptr));
 }
 
 // Terminates execution of the associated wavefront.