[Bug tree-optimization/87645] [7/8 Regression] gcc hangs up on vr_values::vrp_visit_assignment_or_call

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87645

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Backporting that change helps.