http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49859
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> 2011-07-27 01:22:05 UTC --- -Wunreachable-code support was removed because it dependent on optimization and caused some "false positives" (well they are not false positives in the sense they were unreachable code but rather the code compiled with some optimization was a truly unreachable but only with inlining and such). Also does clang warn about Duff's loops?
