[PATCH] D147714: [Attr] Introduce [[clang::nonportable_musttail]] as less strict version of [[clang::musttail]]

[Eli Friedman via Phabricator via cfe-commits]

efriedma added a comment.

An error message pointing at the call in the source code would be good enough, I think.  Adding a "reason" might be nice, but not strictly necessary.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D147714/new/

https://reviews.llvm.org/D147714