[jdk16] RFR: 8260339: JVM crashes when executing PhaseIdealLoop::match_fill_loop

[Vladimir Kozlov]

On Wed, 27 Jan 2021 11:10:59 GMT, Nils Eliasson <neliasso at openjdk.org> wrote:

>>> @Wanghuang-Huawei Have you been able to reproduce this on any other platform that linux-aarch64? I'm having trouble reproducing this on x64.
>> 
>> I think x64 has disabled OptimizeFill by default. I can reproduce this with -XX:+OptimizeFill.
>
> Please add  -XX:+OptimizeFill to the regression test

Yes, OptimizeFill  is off after 8247307 changes in JDK 16. Add it to @run command (it is C2 flag so you need `Ignore*` flag):
* @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+OptimizeFill

-------------

PR: https://git.openjdk.java.net/jdk16/pull/132