[PATCH] Add a test which will fail without r201824

[Dehao Chen]

This test will fail if we don't have
http://gcc.gnu.org/viewcvs/gcc?view=revision&revision=r201824

Bootstrapped and passed regression test.

OK for trunk?

gcc/testsuite/ChangeLog:
2013-10-24  Dehao Chen  <de...@google.com>

* g++.dg/opt/devirt3.C: New test.

Index: gcc/testsuite/g++.dg/opt/devirt3.C
===================================================================
--- gcc/testsuite/g++.dg/opt/devirt3.C (revision 0)
+++ gcc/testsuite/g++.dg/opt/devirt3.C (revision 0)
@@ -0,0 +1,24 @@
+// { dg-do compile }
+// { dg-options "-O2" }
+
+class ert_RefCounter {
+ protected:
+  int refCounterE;
+  virtual ~ert_RefCounter() {}
+};
+
+class ebs_Object : virtual public ert_RefCounter {
+};
+
+class dpr_App : public ebs_Object {
+ public:
+  virtual void run();
+};
+
+class dpr_Job : public ebs_Object {};
+
+void dpr_run(ebs_Object& objectA) {
+  ((dpr_App&)objectA).run();
+  dpr_Job jobL;
+  dpr_run(jobL);
+}