check details of cuf.kernel op

Author: wangzpgi

flang/test/Lower/CUDA/cuda-doconc.cuf

@@ -34,6 +34,6 @@ end
 ! CHECK: func.func @_QPdoconc2() {
 ! CHECK: %[[DECLI:.*]]:2 = hlfir.declare %{{.*}}#0 {uniq_name = "_QFdoconc2Ei"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>)
 ! CHECK: %[[DECLJ:.*]]:2 = hlfir.declare %{{.*}}#0 {uniq_name = "_QFdoconc2Ej"} : (!fir.ref<i32>) -> (!fir.ref<i32>, !fir.ref<i32>)
-! CHECK: cuf.kernel<<<*, *>>>
+! CHECK: cuf.kernel<<<*, *>>> (%arg0 : i32, %arg1 : i32) = (%{{.*}}, %{{.*}} : index, index) to (%{{.*}}, %{{.*}} : index, index)  step (%{{.*}}, %{{.*}} : index, index) {
 ! CHECK: %{{.*}} = fir.load %[[DECLI]]#0 : !fir.ref<i32>
 ! CHECK: %{{.*}} = fir.load %[[DECLJ]]#0 : !fir.ref<i32>