RFR: 8331575: C2: crash when ConvL2I is split thru phi at LongCountedLoop [v2]

Mon May 13 13:27:09 UTC 2024

On Tue, 7 May 2024 17:25:49 GMT, Christian Hagedorn <chagedorn at openjdk.org> wrote:

> It also seems that it's only a problem with loop iv phis because we improve the iv type in such a way that some of the possible values of the backedge are excluded. So, maybe a first step could be to allow splitting the `Conv*` nodes through non-loop-iv phi nodes. However, there might also be other non-loop-iv phi problems I'm currently not aware of. Nevertheless, it might be worth to investigate further in a separate RFE.

I agree that it would be worth investigating further.

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PR Review Comment: https://git.openjdk.org/jdk/pull/19086#discussion_r1598474092