[lworld] RFR: 8352737: [lworld] Fix TestIntrinsics after VarHandle support cleanup

[Marc Chevalier]

On Tue, 9 Sep 2025 09:14:50 GMT, Marc Chevalier <mchevalier at openjdk.org> wrote:

> This remove bailout in 8 cases in `test/hotspot/jtreg/compiler/valhalla/inlinetypes/TestIntrinsics.java`. This use a new small type that is tiny enough to be safely flattened in any case.
> 
> This change also makes sure that both branches in `test_*` are taken by asserting the value of `UseArrayFlattening`/`UseFieldFlattening`. One can check that there is at least one scenario for each case. Just add `Asserts.assertTrue(false);` if you have a doubt. Since each case run in a separate VM, I couldn't find an easy way to count that across scenarii, each branch is taken at least once.
> 
> There are still some bailout since `compareAndSetFlatValue` (and exchange one too) require array flattening. See https://github.com/openjdk/valhalla/pull/1549 & [JDK-8365978](https://bugs.openjdk.org/browse/JDK-8365978).
> 
> Thanks,
> Marc

Thanks @TobiHartmann!

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PR Comment: https://git.openjdk.org/valhalla/pull/1555#issuecomment-3270652348