[lworld] RFR: 8378000: [lworld] Move ArrayProperties to its own class [v3]

[Joel Sikström]

On Wed, 18 Feb 2026 18:45:22 GMT, Frederic Parain <fparain at openjdk.org> wrote:

>> Joel Sikström has updated the pull request incrementally with two additional commits since the last revision:
>> 
>>  - Add assert to check for invalid flags/bits
>>  - Change type to be consistent with compiler type
>
> This is a very nice encapsulation of ArrayProperties. However, I'm wondering if the transformation could go one step further and make ArrayProperties instances immutable, because after their creation, there's no reason to change the set of properties of the array. This would prevent accidental modifications of the property set. It would also allow the creation of a static instance for the "default" set of properties independent from the constructors.

Thank you for the reviews @fparain @Arraying! I reran tier1-4 which is green. The GHA failure is unrelated.

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PR Comment: https://git.openjdk.org/valhalla/pull/2114#issuecomment-3973517532