RFR: 8290700: Optimize AArch64 nmethod entry barriers [v3]

[Erik Österlund]

On Fri, 22 Jul 2022 19:09:34 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

>> Erik Österlund has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains six commits:
>> 
>>  - Merge branch 'master' into 8290700_faster_aarch64_entry_barriers
>>  - 8290700: Optimize AArch64 nmethod entry barriers
>>  - fixing 32 bit build again
>>  - fix 32 bit build again
>>  - 32 bit build fix
>>  - Optimize x86 nmethod entry barriers
>
> Looks reasonable to me.
> Someone familiar with aarch64 code have to review it.

Thanks for the review, @vnkozlov!

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PR: https://git.openjdk.org/jdk/pull/9574