Apply suggestions from code review

Co-authored-by: Steffen Larsen <[email protected]>

Author: reble

sycl/include/sycl/queue.hpp

@@ -1079,14 +1079,12 @@ class __SYCL_EXPORT queue {
   event ext_oneapi_graph(ext::oneapi::experimental::command_graph<
                              ext::oneapi::experimental::graph_state::executable>
                              Graph,
-                         event DepEvent) {
-    const detail::code_location CodeLoc = {};
+                         event DepEvent _CODELOCPARAM(&CodeLoc)) {
     return submit(
         [&](handler &CGH) {
           CGH.depends_on(DepEvent);
           CGH.ext_oneapi_graph(Graph);
-        },
-        CodeLoc);
+        } _CODELOCFW(CodeLoc));
   }
 
   /// Shortcut for executing a graph of commands.

sycl/source/detail/graph_impl.cpp

@@ -22,7 +22,7 @@ namespace oneapi {
 namespace experimental {
 namespace detail {
 
-void graph_impl::exec(sycl::detail::queue_ptr q) {
+void graph_impl::exec(const sycl::detail::queue_ptr &q) {
   if (MSchedule.empty()) {
     for (auto n : MRoots) {
       n->topology_sort(MSchedule);
@@ -32,7 +32,7 @@ void graph_impl::exec(sycl::detail::queue_ptr q) {
     n->exec(q);
 }
 
-void graph_impl::exec_and_wait(sycl::detail::queue_ptr q) {
+void graph_impl::exec_and_wait(const sycl::detail::queue_ptr &q) {
   bool isSubGraph = q->getIsGraphSubmitting();
   if (!isSubGraph) {
     q->setIsGraphSubmitting(true);

sycl/source/detail/graph_impl.hpp

@@ -86,8 +86,8 @@ struct graph_impl {
 
   graph_ptr MParent;
 
-  void exec(sycl::detail::queue_ptr q);
-  void exec_and_wait(sycl::detail::queue_ptr q);
+  void exec(const sycl::detail::queue_ptr &q);
+  void exec_and_wait(const sycl::detail::queue_ptr &q);
 
   void add_root(node_ptr n);
   void remove_root(node_ptr n);