https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64843
--- Comment #4 from joseph at codesourcery dot com <joseph at codesourcery dot com> --- (And this shows an admission from the <stdatomic.h> tests - a new gcc.dg/atomic/stdatomic-op-*.c test should be added that tests _add and _sub for pointer types.)
