https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78200
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> --- http://gcc.opensuse.org/SPEC/CINT/sb-czerny-head-64-2006/index.html confirms the regression (even bigger with -Ofast -flto -march=native which is a skylake here). Likewise http://gcc.opensuse.org/SPEC/CINT/sb-megrez-head-64-2006/index.html (though peak makes it hard to spot in the graph).
