RFR: 8323012: C2 fails with fatal error: no reachable node should have no use

[Vladimir Kozlov]

On Fri, 5 Jan 2024 09:29:15 GMT, Tobias Hartmann <thartmann at openjdk.org> wrote:

> Incorrect refactoring from [JDK-8322490](https://bugs.openjdk.org/browse/JDK-8322490), probably a copy-paste error, leads to a dead `CastPP` and might have other not yet observed effects. See JBS for details.
> 
> I wasn't able to extract a regression test for this but it reliably reproduced with replay compilation.
> 
> Thanks,
> Tobias

Good.

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PR Review: https://git.openjdk.org/jdk/pull/17276#pullrequestreview-1806644365