[Bug rtl-optimization/68991] -O3 generates misaligned xorv4si3

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68991

--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
But why should the *mov<mode>_internal use Bm or vector_operand?  It can/should
handle both aligned and unaligned memory operands.