KONNO Kazuhiro

I haven't been able to reproduce the failure locally, running the test more than 60 times. I used the binary from https://openj9-jenkins.osuosl.org/job/Build_JDK11_aarch64_linux_Nightly/489/

I ran a [30x Grinder job](https://openj9-jenkins.osuosl.org/job/Grinder/2789/) with the latest nightly build from https://openj9-jenkins.osuosl.org/job/Build_JDK11_aarch64_linux_Nightly/498/, and got no failures.

Another 30x Grinder job was also successful. https://openj9-jenkins.osuosl.org/job/Grinder/2808/

I ran a 20x jdk_util_0 Grinder job, and got no failures. https://openj9-jenkins.osuosl.org/job/Grinder/2875/

Another 20x Grinder job did not fail, either. https://openj9-jenkins.osuosl.org/job/Grinder/2876/

@hzongaro Please take a look at @Akira1Saitoh's comment above. It looks like an issue in optimization.

Jenkins compile alinux64 jdk8,jdk11,jdk17,jdk21

Jenkins compile alinux64 jdk8,jdk11,jdk17,jdk21

Test_JITHelpers.java also needs to be changed. https://github.com/eclipse-openj9/openj9/blob/69cba86c0f11ba3d7e67cfbfdb863368bc17e8bf/test/functional/Java8andUp/src/org/openj9/test/com/ibm/jit/Test_JITHelpers.java#L439

I opened PR #19790 for `canEncodeAsLatin1()`, which does not require changes in the test code.