RFR: 8290082: [PPC64] ZGC C2 load barrier stub needs to preserve vector registers [v2]

[Dean Long]

On Mon, 11 Jul 2022 15:36:35 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:

>> Preserve volatile vector registers in ZGC C2 load barrier stub.
>
> Martin Doerr has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Avoid using more than the volatile program storage (288 Bytes) on stack below the SP.

Does this need to be fixed in jdk19?

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PR: https://git.openjdk.org/jdk/pull/9453