[lworld] RFR: 8370880: [lworld] Split ciObjArrayKlass into ciRefArrayKlass and ciFlatArrayKlass [v4]

[Quan Anh Mai]

On Tue, 6 Jan 2026 12:05:16 GMT, Quan Anh Mai <qamai at openjdk.org> wrote:

>> Hi,
>> 
>> This PR splits `ciObjArrayKlass` into `ciRefArrayKlass` and `ciFlatArrayKlass`, aligns the hierarchy with the corresponding types of the VM.
>> 
>> Please kindly review, thanks a lot.
>
> Quan Anh Mai has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains eight commits:
> 
>  - Remove unnecessary UseCompressedOops checks
>  - Merge branch 'lworld' into ciRefArray
>  - wrong value is passed as flat
>  - remove redundant changes
>  - Merge branch 'lworld' into ciRefArray
>  - Revert "can only infer klass if exact"
>    
>    This reverts commit be6143624d30c9ebfa560dd8161aa70270c68d24.
>  - can only infer klass if exact
>  - Refactor ciObjArrayKlass to align with the VM type

Thanks a lot for your reviews!

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PR Comment: https://git.openjdk.org/valhalla/pull/1739#issuecomment-3714840726