PR target/59605

	* config/i386/i386.c (ix86_expand_set_or_movmem): Create
	jump_around_label only if it doesn't exist.

	* gcc.dg/pr59605.c: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@206242 138bc75d-0d04-0410-961f-82ee72b054a4

4 files changed, 68 insertions, 1 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 5834df2d7c3..290a978f8bd 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2013-12-30   H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR target/59605
+	* config/i386/i386.c (ix86_expand_set_or_movmem): Create
+	jump_around_label only if it doesn't exist.
+
 2013-12-28  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* doc/invoke.texi (output file options): Document -fada-spec-parent.
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 2fc9b802993..6e6b2617f92 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -24047,7 +24047,8 @@ ix86_expand_set_or_movmem (rtx dst, rtx src, rtx count_exp, rtx val_exp,
       else
 	{
 	  rtx hot_label = gen_label_rtx ();
-	  jump_around_label = gen_label_rtx ();
+	  if (jump_around_label == NULL_RTX)
+	    jump_around_label = gen_label_rtx ();
 	  emit_cmp_and_jump_insns (count_exp, GEN_INT (dynamic_check - 1),
 				   LEU, 0, GET_MODE (count_exp), 1, hot_label);
 	  predict_jump (REG_BR_PROB_BASE * 90 / 100);
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index bd46fa64ab2..b7f12f5b9b5 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2013-12-30   H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR target/59605
+	* gcc.dg/pr59605.c: New test.
+
 2013-12-27  Yury Gribov  <y.gribov@samsung.com>
 
 	PR target/59585
diff --git a/gcc/testsuite/gcc.dg/pr59605.c b/gcc/testsuite/gcc.dg/pr59605.c
new file mode 100644
index 00000000000..45568438277
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr59605.c
@@ -0,0 +1,55 @@
+/* { dg-do run } */
+/* { dg-options "-O2" } */
+/* { dg-additional-options "-minline-stringops-dynamically" { target { i?86-*-* x86_64-*-* } } } */
+
+extern void abort (void);
+
+#define MAX_OFFSET (sizeof (long long))
+#define MAX_COPY (1024 + 8192)
+#define MAX_EXTRA (sizeof (long long))
+
+#define MAX_LENGTH (MAX_OFFSET + MAX_COPY + MAX_EXTRA)
+
+static union {
+  char buf[MAX_LENGTH];
+  long long align_int;
+  long double align_fp;
+} u;
+
+char A[MAX_LENGTH];
+
+int
+main ()
+{
+  int off, len, i;
+  char *p, *q;
+
+  for (i = 0; i < MAX_LENGTH; i++)
+    A[i] = 'A';
+
+  for (off = 0; off < MAX_OFFSET; off++)
+    for (len = 1; len < MAX_COPY; len++)
+      {
+	for (i = 0; i < MAX_LENGTH; i++)
+	  u.buf[i] = 'a';
+
+	p = __builtin_memcpy (u.buf + off, A, len);
+	if (p != u.buf + off)
+	  abort ();
+
+	q = u.buf;
+	for (i = 0; i < off; i++, q++)
+	  if (*q != 'a')
+	    abort ();
+
+	for (i = 0; i < len; i++, q++)
+	  if (*q != 'A')
+	    abort ();
+
+	for (i = 0; i < MAX_EXTRA; i++, q++)
+	  if (*q != 'a')
+	    abort ();
+      }
+
+  return 0;
+}