[clang] [clang] add unnamed_addr function attribute (PR #92499)

[Erich Keane via cfe-commits]

https://github.com/erichkeane commented:

Hmm... I'm not sure this meets our requirements for inclusion as an attribute.  The semantics of this are pretty opaque, no obvious significant motivation/applicability in the base languages, etc.  There doesn't seem to be any reasonable use case that I can see.

The attribute itself in LLVM isn't sufficient motivation for inclusion of this attribute.

https://github.com/llvm/llvm-project/pull/92499