42cf9c60d7
We used to vectorize these scalably but after #147026 they were split out from RecurKind::Add into their own RecurKinds, and we didn't mark them as supported in isLegalToVectorizeReduction. This caused the loop vectorizer to drop the scalable VPlan because it thinks the reductions will be scalarized. This fixes it by just marking them as supported. Fixes #154554
The LLVM Compiler Infrastructure
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