[PATCH] Testcase for fixed PR52589

[Richard Guenther]

Tested on x86_64-unknown-linux-gnu, applied.

Richard.

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

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

Index: testsuite/gcc.dg/tree-ssa/vrp70.c
===================================================================
--- testsuite/gcc.dg/tree-ssa/vrp70.c   (revision 0)
+++ testsuite/gcc.dg/tree-ssa/vrp70.c   (working copy)
@@ -0,0 +1,27 @@
+/* { dg-do compile } */
+/* { 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" } } */