https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83141
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> --- https://gcc.gnu.org/ml/gcc-patches/2017-11/msg02199.html regresses gfortran.dg/pr45636.f90 because Jakubs pattern matching in tree-ssa-forwprop.c:simplify_builtin_call no longer applies ... (we fold more memcpy calls).
