RFR: 8295407: C2 crash: Error: ShouldNotReachHere() in multiple vector tests with -XX:-MonomorphicArrayCheck -XX:-UncommonNullCast [v2]

[Fei Gao]

On Mon, 14 Nov 2022 06:03:42 GMT, Tobias Hartmann <thartmann at openjdk.org> wrote:

>> @TobiHartmann, thanks for your review! The options added here is commented as part of summary title, not as JVM options. I suppose it should be fine for a release build, right? :-)
>
> Right, I missed that. Does the test reproduce the issue without these flags? In any case, I think a more descriptive summary would be good.

Yes, the added testcase here can reproduce the issue even without these flags and I suppose those flags help C2 vectorize more hot loops in the reported testcases. I updated the summary part in the new commit. Thanks for your suggestion @TobiHartmann!

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PR: https://git.openjdk.org/jdk/pull/11034