[Bug tree-optimization/91191] vrp and boolean arguments

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91191

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 46610
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46610&action=edit
untested patch