[Bug tree-optimization/81489] invalid phi argument used in find_implicit_erroneous_behavior

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81489

--- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 41796
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41796&action=edit
Patch, bootstrapped and reg-tested