[PATCH] D57265: [PM/CC1] Add -f[no-]split-cold-code CC1 options to toggle splitting

[Vedant Kumar via Phabricator via llvm-commits]

vsk added a comment.

Thanks Hans. I've merged the revert into the apple fork. While the commit was in-tree, we noticed that this enabled HCS during LTO. There was a surprising ~17% regression of 483.xalancbmk with LTO (+ PGO) enabled:  `2020-10-16	CINT2006/483.xalancbmk	17.87%`. We don't see the regression on the non-LTO performance bots. This is something we'll need to investigate before relanding.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D57265/new/

https://reviews.llvm.org/D57265