http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49194 --- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-05-27 16:24:45 UTC --- Oops, s/65536/128/, I've changed the testcase too late without retesting. Anyway, the point is that the limits should be adjusted somewhat if the call is PROB_VERY_UNLIKELY.