https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93031
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> --- It's still UB. Note that GCC has for a _long_ time made this assumption - just the places we take advantage of it have grown. Note it would be _very_ difficult to provide a -fno-strict-alignment option because we can't really make all data types unaligned since that would break the ABI. So instead we'd have to sprinkle flag_strict_alignment checks all over the place so I'm very sure you won't get a "fixed" compiler and you might get one that doesn't adhere to the platform ABI any more (in case we put one flag_strict_alignment too many).
