https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127461
--- Comment #2 from Hongtao Liu <liuhongt at gcc dot gnu.org> --- (In reply to Hongtao Liu from comment #1) > 3266(define_insn "<insn>v2qi3" > 3267 [(set (match_operand:V2QI 0 "register_operand" "=?Q,x,Yw") > 3268 (plusminus:V2QI > 3269 (match_operand:V2QI 1 "register_operand" "<comm>0,0,Yw") > 3270 (match_operand:V2QI 2 "register_operand" "Q,x,Yw"))) > 3271 (clobber (reg:CC FLAGS_REG))] > 3272 "!TARGET_PARTIAL_REG_STALL || optimize_size || TARGET_SSE2" > 3273 "#" > 3274 [(set_attr "isa" "*,sse2_noavx,avx") > 3275 (set_attr "type" "multi,sseadd,sseadd") > 3276 (set_attr "mode" "QI,TI,TI") > 3277 (set (attr "enabled") > 3278 (cond [(and (eq_attr "alternative" "0") > 3279 (and (match_test "TARGET_PARTIAL_REG_STALL") > 3280 (not (match_test "optimize_function_for_size_p > (cfun)")))) > 3281 (symbol_ref "false") > 3282 ] > 3283 (const_string "*")))]) > > Looks like optmize_size is not equal to optimize_function_for_size_p (cfun) Either change the pattern condition（and the below define_split) to "!TARGET_PARTIAL_REG_STALL || optimize_function_for_size_p (cfun) || TARGET_SSE2" or change the test the (attr "enabled") to (not (match_test "optimize_size")?
