https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103278
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |missed-optimization Target Milestone|--- |12.0 Status|UNCONFIRMED |NEW Ever confirmed|0 |1 Last reconfirmed| |2021-11-16 --- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Confirmed. >;; Canonical GIMPLE case clusters: 9-10 12-13 32 48 I suspect there is some cost issue going on here. DCE is now able to combine empty bb's into one which causes iftoswitch to have a cost fit.