[PATCH] D67645: [aarch64] add def-pats for dot product

[Abderrazek Zaafrani via Phabricator via llvm-commits]

az added a comment.

What if the code is written with intrinsic but using mul, reduce (say similar to last test in this patch), then this patch will optimize that into dot product instruction. So, for legacy code that was written with old intrinsic, then this patch will remain useful even after dot product is implemented in the vectorizer.

Note that if somebody will be writing new code with intrinsic using mul, reduce instead of dot product, he is probably doing that for a reason and will want it to stay that way (he can then use the right flags to disable dot product).


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  https://reviews.llvm.org/D67645/new/

https://reviews.llvm.org/D67645