[lworld] RFR: 8354529: [lworld] Add tests for flat arrays in CDS archive [v2]

[Ioi Lam]

On Wed, 11 Feb 2026 22:16:02 GMT, Matias Saavedra Silva <matsaave at openjdk.org> wrote:

>> With CDS and AOT now fully supported in lworld, we need better test coverage to ensure that flat arrays are archived correctly. This patch adds a test to check that an array of both a migrate value class and a flattenable user defined value class can be archived and restored correctly in a static CDS dump. 
>> 
>> During the process it was discovered that the object subgraph was overlooking the element class of flat arrays, so proper handling was added courtesy of @iklam.
>> 
>> Verified with tier 1-5 tests.
>
> Matias Saavedra Silva has updated the pull request incrementally with one additional commit since the last revision:
> 
>   ioi comment and additional testing

LGTM

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Marked as reviewed by iklam (Committer).

PR Review: https://git.openjdk.org/valhalla/pull/2081#pullrequestreview-3787963658