RFR: 8365205: C2: Optimize popcount value computation using knownbits [v12]

[Jatin Bhateja]

On Mon, 6 Oct 2025 07:50:41 GMT, Tobias Hartmann <thartmann at openjdk.org> wrote:

>> Jatin Bhateja has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Review comments resolution
>
> Testing all passed. I'll pass the review to someone else.

Hi @TobiHartmann, we have @merykitty and @SirYwell  clearance, need your approval to land this.

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PR Comment: https://git.openjdk.org/jdk/pull/27075#issuecomment-3384292699