RFR: 8349686: [s390x] C1: Improve Class.isInstance intrinsic [v11]

[Andrew Haley]

On Wed, 19 Mar 2025 10:17:56 GMT, Amit Kumar <amitkumar at openjdk.org> wrote:

>> s390x implementation for Class.isInstance intrinsic. 
>> 
>> Tier1 test on release & fastdebug vm are clean with flag: `-XX:-UseSecondarySupersCache -XX:+UseSecondarySupersTable -XX:+VerifySecondarySupers -XX:+StressSecondarySupers`. 
>> 
>> Benchmark results will be updated soon.
>
> Amit Kumar has updated the pull request incrementally with one additional commit since the last revision:
> 
>   suggestion from Lutz

OK!

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Marked as reviewed by aph (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/23535#pullrequestreview-2739577689