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

[Hana Dusíková via cfe-commits]

hanickadot wrote:

> Unfortunately we currently have two constant expression evaluators, can you take a look at implementing this in the bytecode interpreter as well? Since this PR is already pretty big I think it would be OK to do it in a follow-up PR.

I will try, I'm not familiar with that code at all. If there is someone I can ask question, it would be greatly appreciated.

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