[Bug tree-optimization/86231] [8/9 Regression] vrp_meet causes wrong-code

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86231

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 44299
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44299&action=edit
gcc9-pr86231.patch

Full untested patch.