Commits on Feb 21, 2024

1. Fix race condition in OpenCL kernel …

   Without the barrier at the end of barrierOR, it is possible for
   work-item 0 to start the next loop iteration and update predicates[0]
   while other work-items are still inside barrierOR reading `predicates`,
   meaning they read the next loop iteration's exit condition. This results
   in a divergent loop, where not all work-items reach the same barriers.
   
   A previous fix identified this as a problem only on NVIDIA platforms,
   but strictly speaking a barrier is required in all cases to avoid a spec
   violation and undefined behaviour.

   

   frasercrmck committed Feb 21, 2024
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