http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50325
--- Comment #13 from David Edelsohn <dje at gcc dot gnu.org> 2011-11-17 14:02:47 UTC --- The comment for the new code show the error in logic: /* If the remaining chunk doesn't have full wordsize we have to make sure that for big endian machines the higher order bits are used. */ The statement in the comment is not true. This depends on the target ABI's aggregate padding rules.