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

[Craig Topper via Phabricator via llvm-commits]

craig.topper added a comment.

Instead of doing this combine by starting on the flag node. Could from the flag user and simultaneously rewrite the flag user and commute the flag node in the same combine?


Repository:
  rL LLVM

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

https://reviews.llvm.org/D58875