https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115954
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> --- (In reply to Richard Biener from comment #1) > Not sure what the x86 psABI says here (possibly nothing for aggregate > _Atomic). It doesn't consider _Atomic [influencing the ABI] at all. Note I think your test queries actual object alignment which a compiler can of course increase vs. what the ABI requires as minimum alignment, you should possibly cross-check with alignof/sizeof of the type. On x86 clang returns size 8 and align 8 for the atomic A7 type (GCC does not).
