RFR: 8310939: [c1] The visibility of write-volatile requires membar_volatile instead of membar

[Andrew Haley]

On Thu, 29 Jun 2023 20:47:19 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:

> I wonder if a performance improvement can be measured on any other platform. I guess StoreLoad is typically so slow that other orderings don't matter?

I know of no other processor on which StoreLoad is not also a full barrier.

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PR Comment: https://git.openjdk.org/jdk/pull/14677#issuecomment-1641903765