[llvm-branch-commits] [clang] Ofast deprecation clarifications (PR #101005)

[Sjoerd Meijer via llvm-branch-commits]

sjoerdmeijer wrote:

> I think we need these changes to be against main and not 19.x, aside from the release notes (otherwise we're losing the documentation in 20.x). 

Oh right, yes, missed that, makes sense. Will split this up, let's do the documentation update here first as suggested. 

https://github.com/llvm/llvm-project/pull/101005