https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68991
--- Comment #12 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to H.J. Lu from comment #9)
> With Bm constraint on SSE *mov<mode>_internal, curr_insn_transform in
> lra-constraints.c generates an extra
>
> (insn 354 353 323 8 (set (reg:V4SF 192)
> (reg:V4SF 202 [192])) 1226 {*movv4sf_internal}
> (nil))
>
> for input:
>
> (insn 353 322 354 8 (set (reg:V4SF 202 [192])
> (reg:V4SF 201 [192])) 1226 {*movv4sf_internal}
> (nil))
LRA is OK when Bm is properly defined as
(define_memory_constraint "Bm"
"@internal Vector memory operand."
(match_operand 0 "vector_memory_operand"))
