[jdk21u-dev] RFR: 8300148: Consider using a StoreStore barrier instead of Release barrier on ctor exit

[Paul Hohensee]

On Wed, 24 Apr 2024 19:02:10 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> The backport is not clean because the hunk in `macro.cpp` does not apply to JDK 21, because it was added later with [JDK-8287061](https://bugs.openjdk.org/browse/JDK-8287061).
> 
> We have been carrying this patch in our internal releases for 4 months, with some services using it successfully. It is time to bring it to JDK 21u.
> 
> Additional testing:
>  - [x] New benchmark improves
>  - [x] New IR test passes
>  - [x] Linux AArch64 server fastdebug, `all`
>  - [x] Linux x86_64 server fastdebug, `all`

Marked as reviewed by phh (Reviewer).

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PR Review: https://git.openjdk.org/jdk21u-dev/pull/530#pullrequestreview-2326440418