http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47947
--- Comment #5 from David Edelsohn <dje at gcc dot gnu.org> 2011-03-02 22:48:10 UTC --- The bug does not occur with -O1. It does occur with -O2 and above, both 32 bit and 64 bit AIX.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47947
--- Comment #5 from David Edelsohn <dje at gcc dot gnu.org> 2011-03-02 22:48:10 UTC --- The bug does not occur with -O1. It does occur with -O2 and above, both 32 bit and 64 bit AIX.