[clang] [Clang] Introduce scoped variants of GNU atomic functions (PR #72280)

[Eli Friedman via cfe-commits]

efriedma-quic wrote:

I'm a little wary of adding these without actually going through any sort of standardization process; if other vendors don't support the same interface, we just have more variations.  (See also https://clang.llvm.org/get_involved.html#criteria )

How consistent are the various scopes across targets?  How likely is it that some target will need additional scopes that you haven't specified?

https://github.com/llvm/llvm-project/pull/72280