search for: __c11_atomic

I have started working on an implementation of atomic_ref. Implementing this requires performing atomic operations on arbitrary references. The behavior is undefined if a reference is provided that is not aligned per the public export required_alignment. What assumptions do the __c11_atomic builtins make about destination argument alignment, format, size etc.? Is it required that the destination argument be annotated as _Atomic like the corresponding standard c11 functions require? The following code in libcxx/include/config implies that the c11 atomic builtins should be substituted...