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revert clGetEventInfo returning CL_COMPLETE is a sync point#1558

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bashbaug:revert-event-complete
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revert clGetEventInfo returning CL_COMPLETE is a sync point#1558
bashbaug wants to merge 1 commit into
KhronosGroup:mainfrom
bashbaug:revert-event-complete

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This PR changes the behavior of clGetEventInfo(CL_EVENT_COMMAND_EXECUTION_STATUS) returning CL_COMPLETE back to the behavior in OpenCL 3.0. This avoids a potential performance regression when the stronger host synchronization point is not needed, for example to determine if the event is CL_COMPLETE to query event profiling data.

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