RFR: 8370454: C2 SuperWord: unsigned comparison information is lost for VectorMaskCmp [v2]

[Emanuel Peter]

On Thu, 23 Oct 2025 10:17:32 GMT, Hamlin Li <mli at openjdk.org> wrote:

>> @Hamlin-Li That looks like a great improvement :)
>> 
>> All I am missing are some test cases. And if possible: IR rules 😉
>
>> @Hamlin-Li That looks like a great improvement :)
> 
> Thank you for having a look! :)
>  
>> All I am missing are some test cases. And if possible: IR rules 😉
> 
> Yes, I also added some tests and IR rules of course. :)

@Hamlin-Li 
I just looked at your Bug report [JDK-8370481](https://bugs.openjdk.org/browse/JDK-8370481).
Can you add a reproducer, and on what platforms you have experienced the failure?

If you are fixing a bug here, we should focus on the bug only. After all, we may want to backport the bugfix.

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PR Comment: https://git.openjdk.org/jdk/pull/27942#issuecomment-3436224804