[PATCH] D120544: [AMDGPU] Omit unnecessary waitcnt before barriers

[Nicolai Hähnle via Phabricator via llvm-commits]

nhaehnle added a comment.

In D120544#3466638 <https://reviews.llvm.org/D120544#3466638>, @kerbowa wrote:

> I believe HIP adds a release fence before the barrier and an acquire directly after. Would something like that make sense?

Yes, generally I expect that is what's required.


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