RFR: 8287432: C2: assert(tn->in(0) != __null) failed: must have live top node [v2]

[Christian Hagedorn]

On Tue, 7 Jun 2022 20:58:18 GMT, Devin Smith <duke at openjdk.java.net> wrote:

>> Christian Hagedorn has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Update test/hotspot/jtreg/compiler/c2/TestRemoveMemBarPrecEdge.java
>>   
>>   Co-authored-by: Tobias Hartmann <tobias.hartmann at oracle.com>
>
> I'm not qualified to review this, but I can confirm the test is triggering the `PhaseAggressiveCoalesce::coalesce` SIGSEGV against the 11/17 LTS versions I'm running. Thanks for your investigation and fix!

Thanks @devinrsmith for confirming this!

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PR: https://git.openjdk.java.net/jdk/pull/9060