[foreign-memaccess+abi] RFR: Fix bug in hashCode after JDK-8291473 [v2]

[Jorn Vernee]

On Tue, 9 Aug 2022 21:28:04 GMT, Maurizio Cimadamore <mcimadamore at openjdk.org> wrote:

>> There is an asymmetry between MemorySegment::equals and MemorySegment::hashCode after the unification of memory segment and memory address.
>> 
>> Both methods should only take into account unsafe offset and base (e.g. two segments are equals if they point to same memory location).
>
> Maurizio Cimadamore has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Add hashcode test

👍

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Marked as reviewed by jvernee (Committer).

PR: https://git.openjdk.org/panama-foreign/pull/701