RFR: 8366584: Add an InstanceKlass::super() method that returns InstanceKlass* [v3]

[Ioi Lam]

On Tue, 2 Sep 2025 05:31:30 GMT, David Holmes <dholmes at openjdk.org> wrote:

>> Ioi Lam has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   @dholmes-ora and @coleep comments
>
> src/hotspot/share/oops/klassVtable.cpp line 1574:
> 
>> 1572:   Klass* super = _klass->super();
>> 1573:   if (super != nullptr) {
>> 1574:     InstanceKlass* sk = InstanceKlass::cast(super); // why are we sure this is InstanceKlass??
> 
> I don't think it is guaranteed to be an IK. But AFAICS we don't actually need an IK here anyway, we should be able to use `super` directly.

Fixed.

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PR Review Comment: https://git.openjdk.org/jdk/pull/27037#discussion_r2317170011