[clang] Basic, Sema: introduce `__attribute__((__personality__(...)))` (PR #185225)

[Erich Keane via cfe-commits]

https://github.com/erichkeane commented:

2 concerns in the code.

However, creating an arbitrary runtime function without ensuring that we don't have an existing "user defined" function here is concerning.  What happens if you assign a 'personality' to the name of a different function?  Is that not problematic?  Particularly if the type doesn't match? 



https://github.com/llvm/llvm-project/pull/185225