[Bug c/76774] atomics on PPC: inconsistent widths for an _Atomic(_Bool) and for atomic_compare_exchange_strong on it

[Peter.Sewell at cl dot cam.ac.uk]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=76774

--- Comment #1 from Peter Sewell <Peter.Sewell at cl dot cam.ac.uk> ---
Created attachment 39439
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=39439&action=edit
example code