RFR: 8362979: C2 fails with unexpected node in SuperWord truncation: CmpLTMask, RoundF

[Christian Hagedorn]

On Mon, 28 Jul 2025 02:34:25 GMT, Jasmine Karthikeyan <jkarthikeyan at openjdk.org> wrote:

> Hi all,
> This is a fix for a debug assert failure in SuperWord truncation for `CmpLTMask` and `RoundF` nodes, as discovered by CTW in the linked JBS report. I've added the nodes to the switch, and added reduced test cases. I've made a similar fix for `RoundD` nodes as well. Thanks!

Looks good!

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Marked as reviewed by chagedorn (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/26494#pullrequestreview-3060502412