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

[Eirik Bjørsnøs]

On Mon, 6 Oct 2025 08:12:32 GMT, Hannes Greule <hgreule at openjdk.org> wrote:

> That label was added automatically, closely after https://mail.openjdk.org/pipermail/jdk-dev/2025-September/010486.html. Not sure why, but the change is definitely hotspot specific.

Right, makes sense. I'll go ahead and remove that label.

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PR Comment: https://git.openjdk.org/jdk/pull/27075#issuecomment-3370433481