[PATCH] D124867: [SLP][NFC] Pre-commit test showing horizontal reduction preventing FMA

[Alexey Bataev via Phabricator via llvm-commits]

ABataev added a comment.

In D124867#3506211 <https://reviews.llvm.org/D124867#3506211>, @wjschmidt wrote:

> In D124867#3506146 <https://reviews.llvm.org/D124867#3506146>, @ABataev wrote:
>
>> The undefs still here.
>
> Yes, see above -- I was unable to find a sequence without the undefs that causes the horizontal reduction to kick in.

Use -slp-threshold option to avoid problems with the cost.


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