https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105854
Hongtao.liu <crazylht at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |crazylht at gmail dot com --- Comment #1 from Hongtao.liu <crazylht at gmail dot com> --- 21114(define_insn_and_split "ssse3_palignrdi" 21115 [(set (match_operand:DI 0 "register_operand" "=y,x,Yv") 21116 (unspec:DI [(match_operand:DI 1 "register_operand" "0,0,Yv") 21117 (match_operand:DI 2 "register_mmxmem_operand" "ym,x,Yv") 21118 (match_operand:SI 3 "const_0_to_255_mul_8_operand")] 21119 UNSPEC_PALIGNR))] 21120 "(TARGET_MMX || TARGET_MMX_WITH_SSE) && TARGET_SSSE3" Alternative 2 requires Yw instead of Yv since it's splitted to vpsrldq which requires AVX512VL & AVX512BW for evex version.