https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97950
--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> --- Comment on attachment 49613 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=49613 gcc11-pr97950.patch >+(define_insn_and_split "*setcc_hi_1" >+ [(set (match_operand:HI 0 "register_operand" "=q") >+ (match_operator:HI 1 "ix86_comparison_operator" >+ [(reg FLAGS_REG) (const_int 0)]))] >+ "!TARGET_PARTIAL_REG_STALL" >+ "#" >+ "&& reload_completed" >+ [(set (match_dup 2) (match_dup 1)) >+ (set (match_dup 0) (zero_extend:DI (match_dup 2)))] zero_extend:HI Perhaps you could apply SWI24 mode iterator to existing *setcc_si_1_and and *setcc_si_1_movzbl?
