http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57074
--- Comment #4 from Alan Modra <amodra at gmail dot com> 2013-05-02 11:35:20 UTC --- I believe this is triggered by powerpc turning on -fsection-anchors by default, and a section anchor bug loses the alignment. The classes are all nicely aligned if I compile with -fno-section-anchors
