[PATCH] D81416: [LV][SLP] Interleave to expose ILP for small loops with scalar reductions.

[Aaron H Liu via Phabricator via llvm-commits]

AaronLiu added a comment.

In the application we try, LV refuse to vectorize due to not profitable, but if we force LV to vectorize and it will crash. Apparently there are some obstacles. There are cases that even if LV fails, SLP could succeed.
Yes, the term small loop is a little bit of confusing. For example a loop which has a small number of instructions but has a huge loop trip count, is the loop small or big? In our example, the loop trip count is small, and also the instruction number is small.


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  https://reviews.llvm.org/D81416/new/

https://reviews.llvm.org/D81416