RFR: 8370502: C2: segfault while adding node to IGVN worklist [v4]

[Emanuel Peter]

On Thu, 27 Nov 2025 19:14:05 GMT, Kerem Kat <krk at openjdk.org> wrote:

>> Do not try to replace `fallthrough_memproj` when it is null, fixes crash.
>> 
>> Test case is simplified from the ticket. Verified that the case crashes without the fix.
>
> Kerem Kat has updated the pull request incrementally with one additional commit since the last revision:
> 
>   fix rename

test/hotspot/jtreg/compiler/c2/TestUnlockNodeNullMemprof.java line 29:

> 27:  * @summary Do not segfault while adding node to IGVN worklist
> 28:  *
> 29:  * @run main/othervm -Xbatch compiler.c2.TestUnlockNodeNullMemprof

Suggestion:

 * @run main/othervm -Xbatch ${test.main.class}


Possible since a recent JTREG update. Makes wrongly copying class name go away ;)

Also: I wonder if we should also have a run without any flags?

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PR Review Comment: https://git.openjdk.org/jdk/pull/28432#discussion_r2571167814