RFR: 8351889: C2 crash: assertion failed: Base pointers must match (addp 344)

[Emanuel Peter]

On Tue, 3 Jun 2025 14:59:23 GMT, Roland Westrelin <roland at openjdk.org> wrote:

> In the example above, the CastPPs are the bases.

Aaaah, ok now it makes a little more sense to me :)

> > Maybe some more full IR snippets could be helpful, maybe even IGV drawings. But that may be more work for you.
> 
> I rarely use the IGV so, yeah, that would be more work.

Then what about just the dump of the relevant IR nodes in text form? That is what I meant by `full IR snippets` ;)

Is there any (reasonable) way to push the `CastPP` through the `AddP` here? I guess that may mean duplicating some `AddP` in some cases... But it could also give an opportunity for the `CastPP` to common further up that way. What do you think? It is hard for me to see through it without looking at some examples of the IR.

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PR Comment: https://git.openjdk.org/jdk/pull/25386#issuecomment-2938917626