[PATCH] D53865: [LoopVectorizer] Improve computation of scalarization overhead.

[Ayal Zaks via Phabricator via llvm-commits]

Ayal added a comment.

Making better decisions what to vectorize and what to keep scalar is clearly useful enough to include in the loop vectorizer. However, this should best be done in a target independent way; e.g., how `computePredInstDiscount()` and `sinkScalarOperands()` work to expand the scope of scalarized instructions according to the cumulative cost discount of potentially scalarized instruction chains. Unless there's a good reason for it to be target specific(?)


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  https://reviews.llvm.org/D53865/new/

https://reviews.llvm.org/D53865