[lilliput-jdk21u:lilliput] RFR: 8316126: [Lilliput/JDK21] Cherry-pick: 8305895: Implementation: JEP 450: Compact Object Headers (Experimental) [v7]

[Aleksey Shipilev]

On Thu, 14 Sep 2023 11:56:13 GMT, Roman Kennke <rkennke at openjdk.org> wrote:

>> Let's cherry-pick the current state of upstream https://github.com/openjdk/jdk/pull/13961 into Lilliput/JDK21u.
>> 
>> Testing:
>>  - [ ] tier1 +UCOH
>>  - [ ] tier1 -UCOH
>
> Roman Kennke has updated the pull request incrementally with two additional commits since the last revision:
> 
>  - Fix stuff
>  - Revert "Remove bad assert"
>    
>    This reverts commit 93148bb034365bf91e3a9f7c4ffb81840e001b58.

I think this looks for integration. We would need to trawl the diff against 21u once everything is in lilliput-jdk21u.

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Marked as reviewed by shade (Reviewer).

PR Review: https://git.openjdk.org/lilliput-jdk21u/pull/5#pullrequestreview-1626840810