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

[Erich Keane via cfe-commits]

erichkeane wrote:

> > 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.
> 
> do you mean my use case is not reasonable? or it isn't well explained? or something else?

This could be either.  At the moment, I don't see the use of this to be compelling enough to be in the compiler.  That said, the description of the use case is ~3 short sentences.  In general, implementing LLVM attributes in Clang directly is typically not sufficient.

Also, I agree with Eli, IF we do decide to do something like this, it needs to be holistically integrated/designed with the source language.

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