https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65456
--- Comment #7 from Anton Blanchard <anton at samba dot org> ---
Thanks Martin.
Bill: the swaps pass isn't catching our vectorised copy, I guess because of the
adds in the loop:
lxvd2x 0,9,4
addi 28,1,-48
add 6,9,10
xxpermdi 12,0,0,2
xxpermdi 12,12,12,2
stxvd2x 12,0,28
