[PATCH] D61858: Make `__is_base_of` more friendly with unions

[Marshall Clow via Phabricator via cfe-commits]

mclow.lists added a comment.

Note: There are tabs in `clang/test/SemaCXX/type-traits.cpp` that I didn't remove because it would have cluttered up the diff.
I can de-tabify the file when it is committed if people want.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D61858/new/

https://reviews.llvm.org/D61858