[lworld] RFR: 8378273: [lworld] Use acmp map to detect oops for VarHandle [v3]

[Chen Liang]

On Fri, 20 Feb 2026 21:42:30 GMT, Roger Riggs <rriggs at openjdk.org> wrote:

>> Chen Liang has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Refactors per comment
>
> src/java.base/share/classes/jdk/internal/value/ValueClass.java line 58:
> 
>> 56: 
>> 57:     /// {@return whether the flat layout for fields of this type contains references}
>> 58:     /// Returns true if there is no flat layout for fields of the given type.
> 
> Confirming, will return true for an identityClass with only primitive fields?
> The `hasOops` name might need to be more descriptive of the cases for an arbitrary class.

No, if there's a field of an identityClass type in another class, that field is always laid out as a reference.

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PR Review Comment: https://git.openjdk.org/valhalla/pull/2143#discussion_r2837165437