[PATCH] D90445: [SLP] Make SLPVectorizer to use `llvm.masked.gather` intrinsic

[Anton Afanasyev via Phabricator via llvm-commits]

anton-afanasyev added a comment.

In D90445#2416578 <https://reviews.llvm.org/D90445#2416578>, @vdmitrie wrote:

> It sounds like throttling patch should resolve this issue as cutting out ScatterVectorize entry with high cost will effectively return to previous behavior.

Yes, exactly. The only difference with previous behavior could arise in case of the new tree accumulating other instructions starting from ScatterVectorize and NeedToGather GEPs entries, preventing them from being contained in other parts of tree. But these entries are terminal, with so rare speculative exceptions that I believe it's good euristics for this case as well as for the general SLP drawback you mentioned: build the maximum tree and choose the cheapest subtree.


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