[foreign-memaccess+abi] RFR: Generalize PointerInvoke to benchmark by-ref segment return [v2]

[Jorn Vernee]

On Fri, 10 Feb 2023 18:32:12 GMT, Maurizio Cimadamore <mcimadamore at openjdk.org> wrote:

>> I've generalized an existing benchmark to test by-reference segment return in downcalls.
>> Ideally, we should see scalarization of the returned segment, and no GC activity.
>
> Maurizio Cimadamore has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Fix benchmark not to let returned segments escape

Nice beef up!

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Marked as reviewed by jvernee (Committer).

PR: https://git.openjdk.org/panama-foreign/pull/788