[Bug tree-optimization/80087] missing -Wtautological-compare with non-constant operands

[egallager at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80087

--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
Although, for comparison, clang also only prints the same single
-Wtautological-compare warning that gcc does.