https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90497
--- Comment #9 from H.J. Lu <hjl.tools at gmail dot com> ---
Why do we have
define_expand "sse2_umulv1siv1di3"
[(set (match_operand:V1DI 0 "register_operand")
(mult:V1DI
(zero_extend:V1DI
(vec_select:V1SI
(match_operand:V2SI 1 "nonimmediate_operand")
(parallel [(const_int 0)])))
(zero_extend:V1DI
(vec_select:V1SI
(match_operand:V2SI 2 "nonimmediate_operand")
(parallel [(const_int 0)])))))]
"TARGET_SSE2"
"ix86_fixup_binary_operands_no_copy (MULT, V2SImode, operands);")
i386-builtin.def:BDESC (OPTION_MASK_ISA_SSE2 | OPTION_MASK_ISA_MMX, 0,
CODE_FOR_sse2_umulv1siv1di3, "__builtin_ia32_pmuludq", IX86_BUILTIN_PMULUDQ,
UNKNOWN, (int) V1DI_FTYPE_V2SI_V2SI)
sse2_umulv1siv1di3 isn't available with MMX.
