[clang] [clang] constexpr atomic builtins (__c11_atomic_OP and __atomic_OP) (PR #98756)

[Aaron Ballman via cfe-commits]

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AaronBallman wrote:

> > Also, this should update `clang/www/cxx_status.html` to mark that we now implement P3309.
> 
> I'm not sure ... should it go there if it's only a library feature, which needs the builtins to work? `__builtin_is_within_lifetime` didn't go to the release notes too.

Good catch, my suggestion was bad. :-)

https://github.com/llvm/llvm-project/pull/98756