https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97170
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Resolution|--- |INVALID Status|UNCONFIRMED |RESOLVED --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- target_fcvt is wrong. try: (define_insn "target_fcvt" [(set (match_operand:SI 0 "register_operand" "=r") (unspec:SI [(match_operand:SF 1 "register_operand" "f") (reg:SI FCVTMODE_REGNUM)] UNSPEC_FCVT))] "" "fcvt\t%0,%1" ) instead. Basically the set is not dependent on the reg (FCVTMODE_REGNUM) only the instruction itself which is what ever.