[PATCH] D113291: [AggressiveInstCombine] Lower Table Based CTTZ and enable it for AARCH64 in -O3

[Dave Green via Phabricator via llvm-commits]

dmgreen added a comment.

> We've had several other requests for a cost-aware version of instcombine over the years, so maybe we should just use this an opportunity to reframe/rename AggressiveInstCombine.

It could help with doing thing like https://reviews.llvm.org/D114964 earlier too, where the transfroms are not always profitable and not reversible back to the original code, but would be beneficial to do earlier to get better cost modelling and vectorization.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D113291/new/

https://reviews.llvm.org/D113291