RFR: 8328878: Rework [AArch64] Use "dmb.ishst + dmb.ishld" for release barrier

[kuaiwei]

On Mon, 25 Mar 2024 08:57:46 GMT, Andrew Haley <aph at openjdk.org> wrote:

> Are there any possible sequences of `dmb ld; dmb st` that will not be minimized?

The worst case is "dmb ld; dmb st; dmb ish", that will be merged as "dmb ld; dmb ish".

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PR Comment: https://git.openjdk.org/jdk/pull/18467#issuecomment-2017508670