[Bug rtl-optimization/80474] [6 regression] ipa-cp wrongly adding LO(symbol) twice

[ebotcazou at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80474

--- Comment #10 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Created attachment 41471
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41471&action=edit
Tentative fix for 6 branch