http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49128
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-05-23 16:53:00 UTC --- you haven't provided the necessary information requested at http://gcc.gnu.org/bugs/ Specifically you need to say how your gcc was configured (because -mtune should not affect the instructions gcc thinks are supported, that's set by -march) and provide your full compilation command and example code which reproduces the problem
