Optimize x86-64 SSE4.2 strcmp.

The file contained some code which was never used.  Don't compile it
in.

ChangeLog

@@ -1,3 +1,8 @@
+2009-07-25  Ulrich Drepper  <drepper@redhat.com>
+
+	* sysdeps/x86_64/multiarch/strcmp.S: Exclude unused code from being
+	compiled in.
+
 2009-07-24  Ulrich Drepper  <drepper@redhat.com>
 
 	* sysdeps/unix/sysv/linux/configure.in: Don't automatically include

sysdeps/x86_64/multiarch/strcmp.S

@@ -1457,6 +1457,9 @@ LABEL(use_sse4_2_ret):
 	sub	%edx, %eax
 	ret
 
+#if 0
+	/* This code was in the origial submission but isn't used.
+	   --drepper */
 	.p2align 4
 LABEL(aftertail):
 	pcmpeqb	%xmm3, %xmm1
@@ -1467,6 +1470,8 @@ LABEL(aftertail):
 	.p2align 4
 LABEL(exit):
 	lea	-16(%r9, %rcx), %rax	/* locate the exact offset for rdi */
+#endif
+
 LABEL(less32bytes):
 	lea	(%rdi, %rax), %rdi	/* locate the exact address for first operand(rdi) */
 	lea	(%rsi, %rcx), %rsi	/* locate the exact address for second operand(rsi) */