[Bug tree-optimization/83141] SRA and memcpy folding interact badly generating wrong-code

[rguenth at gcc dot gnu.org]

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).