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

[Andrew Haley]

On Mon, 10 Feb 2025 13:33:20 GMT, Amit Kumar <amitkumar at openjdk.org> wrote:

> command: `make test TEST="micro:vm.lang.SecondarySupersLookup" MICRO=" JAVA_OPTIONS=-XX:+UnlockDiagnosticVMOptions -XX:-UseSecondarySupersCache"`

This first set of numbers is dominated by C2-compiled code, not C1. This patch is for C1 only, so please delete these results.

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PR Comment: https://git.openjdk.org/jdk/pull/23535#issuecomment-2649116429