[llvm] [Offload] Don't create events for empty queues (PR #152304)

[Joseph Huber via llvm-commits]

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@@ -590,7 +597,16 @@ Error olGetEventInfoSize_impl(ol_event_handle_t Event, ol_event_info_t PropName,
 }
 
 Error olCreateEvent_impl(ol_queue_handle_t Queue, ol_event_handle_t *EventOut) {
+  auto Pending = Queue->Device->Device->hasPendingWork(Queue->AsyncInfo);
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jhuber6 wrote:

Unrelated, would be nice to have something nicer than `Device->Device->`.

https://github.com/llvm/llvm-project/pull/152304