http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50588
--- Comment #4 from Mikael Pettersson <mikpe at it dot uu.se> 2011-10-02 18:55:45 UTC --- The failure started with r164552: http://gcc.gnu.org/ml/gcc-cvs/2010-09/msg00849.html It's enough to pass -O2 -mtune=athlon to trigger the bug, you don't need -march. I don't see anything x86-specific in that revision so quite possibly it's just triggering a latent x86 backend error.
