i386.c (ix86_expand_movmem): Fix epilogue generation.

gcc:
* config/i386/i386.c (ix86_expand_movmem): Fix epilogue generation.

gcc/testsuite:
* gcc.dg/torture/memcpy-1.c: New test.

From-SVN: r202423

gcc/ChangeLog

+2013-09-10  Michael Zolotukhin  <michael.v.zolotukhin@gmail.com>
+
+	* config/i386/i386.c (ix86_expand_movmem): Fix epilogue generation.
+
 2013-09-10  Alan Modra  <amodra@gmail.com>
 
 	PR target/58330

gcc/config/i386/i386.c

@@ -23329,7 +23329,7 @@ ix86_expand_movmem (rtx dst, rtx src, rtx count_exp, rtx align_exp,
 
   if (count_exp != const0_rtx && epilogue_size_needed > 1)
     expand_movmem_epilogue (dst, src, destreg, srcreg, count_exp,
-			    size_needed);
+			    epilogue_size_needed);
   if (jump_around_label)
     emit_label (jump_around_label);
   return true;

gcc/testsuite/ChangeLog

+2013-09-10  Michael Zolotukhin  <michael.v.zolotukhin@gmail.com>
+
+	* gcc.dg/torture/memcpy-1.c: New test.
+
 2013-09-10  Alan Modra  <amodra@gmail.com>
 
 	* gcc.target/powerpc/pr58330.c: New.

gcc/testsuite/gcc.dg/torture/memcpy-1.c

+/* { dg-do run } */
+/* { dg-additional-options "-mtune=pentiumpro" { target ia32 } } */
+/* { dg-additional-options "-minline-all-stringops" { target { i?86-*-* x86_64-*-* } } } */
+
+static void __attribute__((noinline, noclone))
+my_memcpy (char *dest, const char *src, int n)
+{
+  __builtin_memcpy (dest, src, n);
+}
+
+int
+main (void)
+{
+  char a1[4], a2[4];
+  __builtin_memset (a1, 'a', 4);
+  __builtin_memset (a2, 'b', 4);
+  my_memcpy (a2, a1, 4);
+  if (a2[0] != 'a')
+    __builtin_abort ();
+  return 0;
+}
+