https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78436
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> --- Hmm, maybe it's DECL_SIZE (of the FIELD_DECL) vs. TYPE_PRECISION mismatch not honored by store merging (I can very well think of other places having the same confusion...).
