http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54188
--- Comment #6 from joseph at codesourcery dot com <joseph at codesourcery dot com> 2012-08-08 21:43:18 UTC --- On Wed, 8 Aug 2012, rth at gcc dot gnu.org wrote: > > N1370 (C11 draft) 6.5.3.4 paragraph 3 says: > > > > The _Alignof operator yields the alignment requirement of its > > operand type. > > Does that imply that an i386 host should return 1 for most types, > simply because it *can* allow unaligned accesses? Alignment requirements are defined in terms of "addresses at which objects of that type may be allocated", not in terms of what might happen with a pointer dereference.