http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48156
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-03-18 10:50:29 UTC --- The problem is not in %rdx, but %rsi. It was originally initialized from %rbx right before the call, but now is the %rsi assignment moved before the testing of the j && equals (i, j) condition, which is wrong, because %rsi is call clobbered and thus potentionally clobbered by the call, and more importantly even set right before the call to equals function.
