[llvm] [SPIR-V] Dereference non-null OpGroupAsyncCopy event operands typed as pointer-to-Event (PR #214222)

[Juan Manuel Martinez Caamaño via llvm-commits]

https://github.com/jmmartinez commented:

This looks good to me but please assign a second reviewer to ensure I didn't miss anything.

Just in case, the opaque ocl event is put in the stack; what happens if we try to reverse translate this kind of thing? (I suppose the opaque will end up in an opaque ptr or something like that)

https://github.com/llvm/llvm-project/pull/214222