[foreign-memaccess+abi] RFR: 8275647: Enable multi-register return values for optimized upcall stubs

[Maurizio Cimadamore]

On Tue, 16 Nov 2021 20:27:05 GMT, Jorn Vernee <jvernee at openjdk.org> wrote:

>> Not really, but I thought I'd save the renaming for: https://bugs.openjdk.java.net/browse/JDK-8275648
>
> Doing it here wouldn't be such a hassle though. Though, there's also OptimizedEntryBlob which requires renaming.

That's ok - ship it as is - we can rename later.

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PR: https://git.openjdk.java.net/panama-foreign/pull/608