vrp76.c: New test.

2012-08-01  Tom de Vries  <tom@codesourcery.com>

	* gcc.dg/tree-ssa/vrp76.c: New test.

From-SVN: r190044

gcc/testsuite/ChangeLog

+2012-08-01  Tom de Vries  <tom@codesourcery.com>
+
+	* gcc.dg/tree-ssa/vrp76.c: New test.
+
 2012-08-01  Bill Schmidt  <wschmidt@linux.ibm.com>
 
 	PR tree-optimization/46556

gcc/testsuite/gcc.dg/tree-ssa/vrp76.c

+/* { dg-do link } */
+/* { dg-options "-O2 -fno-tree-switch-conversion" } */
+
+/* Based on f3 from vrp63.c, but with switch instead of if-chain.  This test
+   tests the propagation of an anti-range in a switch statement.  */
+
+extern void link_error (void);
+
+void
+f3 (int s)
+{
+  if (s >> 3 == -2)
+    /* s in range [ -16, -9].  */
+    ;
+  else
+    {
+      /* s in range ~[-16, -9], so none of the case labels can be taken.  */
+      switch (s)
+	{
+	case -16:
+	case -12:
+	case -9:
+	  link_error ();
+	  break;
+	default:
+	  break;
+	}
+    }
+}
+
+int
+main ()
+{
+  return 0;
+}