RFR: 8346869: [AIX] Add regression test for handling 4 Byte aligned doubles in structures

[Martin Doerr]

On Sat, 28 Dec 2024 18:43:30 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:

> [JDK-8317545](https://bugs.openjdk.org/browse/JDK-8317545) introduced code for supporting 4 Byte aligned doubles: https://github.com/openjdk/jdk/blob/60e0730a3ba26180d0eb2cd278e389c3e70fec5f/src/java.base/share/classes/jdk/internal/foreign/abi/ppc64/aix/AixPPC64Linker.java#L59
> We should test this case. The new test can serve as an example implementation for handling such structures in Java code such that it works on all platforms including AIX.

Thanks for the reviews!

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PR Comment: https://git.openjdk.org/jdk/pull/22889#issuecomment-2587227005