[PATCH] D151527: [X86][NFC] Fix a bug after D150436 and update some comments

[Kan Shengchen via Phabricator via llvm-commits]

skan accepted this revision.
skan added a comment.
This revision is now accepted and ready to land.

LGTM


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D151527/new/

https://reviews.llvm.org/D151527