re PR tree-optimization/52589 (VRP missed optimization)

2012-06-29  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/52589
	* gcc.dg/tree-ssa/vrp70.c: New testcase.

From-SVN: r189073

gcc/testsuite/ChangeLog

+2012-06-29  Richard Guenther  <rguenther@suse.de>
+
+	PR tree-optimization/52589
+	* gcc.dg/tree-ssa/vrp70.c: New testcase.
+
 2012-06-28  Janis Johnson  <janisjo@codesourcery.com>
 
 	* g++.dg/cpp0x/nullptr19.c: Remove exta directives on same line.

gcc/testsuite/gcc.dg/tree-ssa/vrp70.c

+/* { dg-do compile } */
+/* { dg-require-effective-target int32plus } */
+/* { dg-options "-O2 -fdump-tree-vrp1" } */
+
+extern void link_error (void);
+
+void
+foo (unsigned int s)
+{
+  if (s + 0x70000000 < 0xf0000000U)
+    {
+      if (s >= 0x80000000U && s < 0x90000000U)
+	link_error ();
+    }
+}
+
+void
+bar (unsigned int s)
+{
+  if (s + 0x70000000 >= 0xf0000000U)
+    {
+      if (s < 0x80000000U || s >= 0x90000000U)
+	link_error ();
+    }
+}
+
+/* { dg-final { scan-tree-dump-not "link_error" "vrp1" } } */
+/* { dg-final { cleanup-tree-dump "vrp1" } } */