This example says me that it doesn't.

$ cat t2.c

int a[2];
int b[2];

int main ()
{
  b[0] = a[0];
  b[1] = a[1];
  return 0;
}

$ gcc t2.c -O3 -S

$ cat t2.s

...

main:
.LFB0:
	.cfi_startproc
	movl	a(%rip), %eax
	movl	%eax, b(%rip)
	movl	a+4(%rip), %eax
	movl	%eax, b+4(%rip)
	xorl	%eax, %eax
	ret
	.cfi_endproc

gcc version is:

commit 71464ecd3a554b889c3bbc53d8874fc532bdf953
Author: trippels <trippels@138bc75d-0d04-0410-961f-82ee72b054a4>
Date:   Mon Jan 12 07:53:10 2015 +0000