https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103842
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (insn 56 55 57 (set (subreg:V4SF (reg:V2SF 124 [ vect__35.17 ]) 0) (div:V4SF (nil) (reg:V4SF 126))) "t.c":18:23 -1 (nil)) Yes that nill there is wrong.