[PATCH] D108789: [clang][NewPM] Mention that legacy PM flags are deprecated

[Fangrui Song via Phabricator via cfe-commits]

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

Looks great!


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D108789/new/

https://reviews.llvm.org/D108789