[PATCH] D58875: [X86] Merge negated ISD::SUB nodes into X86ISD::SUB equivalent (PR40483) (WIP)

[Sanjay Patel via Phabricator via llvm-commits]

spatel added a comment.

If we rebase the tests after rL365711 <https://reviews.llvm.org/rL365711>, I don't see any regressions. Not sure if we're getting all of the optimizations that were intended, but this patch seems safe to commit now.


Repository:
  rL LLVM

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D58875/new/

https://reviews.llvm.org/D58875