RFR: 8327963: C2: fix construction of memory graph around Initialize node to prevent incorrect execution if allocation is removed [v17]

[Emanuel Peter]

On Tue, 4 Nov 2025 08:32:25 GMT, Roland Westrelin <roland at openjdk.org> wrote:

>> src/hotspot/share/opto/memnode.hpp line 1418:
>> 
>>> 1416:     }
>>> 1417:     return res->as_NarrowMemProj();
>>> 1418:   }
>> 
>> Nit, optional: Could we not remove some fluff here with a `isa_NarrowMemProj`? You would not have to check for `res == nullptr`.
>
> I don't think we can. Wouldn't we have to call a method on a possibly `null` res?

You are right. Ignore. My post-jogging brain saw things that were not there 😆

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PR Review Comment: https://git.openjdk.org/jdk/pull/24570#discussion_r2489261245