Add a test for PR tree-optimization/69989

	PR tree-optimization/69989
	* gcc.dg/torture/pr69989.c: New test.

From-SVN: r233792

gcc/testsuite/ChangeLog

+2016-02-28  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR tree-optimization/69989
+	* gcc.dg/torture/pr69989.c: New test.
+
 2016-02-28  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* gcc.target/i386/stack-realign-win.c: New test.

gcc/testsuite/gcc.dg/torture/pr69989.c

+/* { dg-do compile } */
+
+extern int a, b, d;
+extern char c[];
+void
+fn1 (void)
+{
+  for (;;)
+    {
+      if (b)
+	{
+LABEL_T5T5T:
+	  for (; d < a; d++)
+	    c[d] = 6;
+	}
+      break;
+    }
+  if (a > 6)
+    {
+      a = 4;
+      goto LABEL_T5T5T;
+    }
+}