https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64731
--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
On the trunk we get at -O2:
.L2:
leaq (%rdi,%rax), %rcx
leaq (%rsi,%rax), %rdx
movapd (%rdx), %xmm0
addpd (%rcx), %xmm0
movaps %xmm0, -64(%rsp)
movapd 16(%rcx), %xmm0
addpd 16(%rdx), %xmm0
movaps %xmm0, -48(%rsp)
movdqa -64(%rsp), %xmm0
movaps %xmm0, (%rdi,%rax)
movdqa -48(%rsp), %xmm0
movaps %xmm0, 16(%rdi,%rax)
addq $32, %rax
cmpq $8192, %rax
jne .L2
Which is definitely better than before.
