http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55734
--- Comment #19 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-12-19 16:57:31 UTC --- Of course v >> HOST_BITS_PER_WIDE_INT can't be assigned to r, it needs some new temporary, with unsigned HOST_WIDE_INT or gcov_type_unsigned type (and use that temporary instead in if (r) and floor_log2 (r).