RFR: 8365205: C2: Optimize popcount value computation using knownbits [v3]

[Emanuel Peter]

On Tue, 9 Sep 2025 02:09:53 GMT, Jatin Bhateja <jbhateja at openjdk.org> wrote:

>> Jatin Bhateja has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Update countbitsnode.cpp
>
> Hi @TobiHartmann , @SirYwell , @eme64 , can you kindly verify the changes in the latest patch?

@jatin-bhateja I'm going to be out of the office for about 3 weeks, so feel free to ask others for reviews!

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PR Comment: https://git.openjdk.org/jdk/pull/27075#issuecomment-3307301622