RFR: 8365570: C2 fails assert(false) failed: Unexpected node in SuperWord truncation: CastII [v6]

Thu Jan 8 11:28:16 UTC 2026

On Thu, 8 Jan 2026 04:03:48 GMT, Jasmine Karthikeyan <jkarthikeyan at openjdk.org> wrote:

>> Hi all,
>> This is a quick patch for the assert failure in superword truncation with CastII. I've added a check for all constraint cast nodes, and attached a reduced version of the fuzzer test. Thanks!
>
> Jasmine Karthikeyan has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Revert "Use Xcomp test run instead of Warmup(0)"
>   
>   This reverts commit 50bc132676e5a1276bdf2c236ae57873375a773d.

Marked as reviewed by thartmann (Reviewer).

All tests passed.

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PR Review: https://git.openjdk.org/jdk/pull/26827#pullrequestreview-3638976060
PR Comment: https://git.openjdk.org/jdk/pull/26827#issuecomment-3723435745