re PR c++/39106 (aliased to undefined symbol error with thunks)

	PR c++/39106
	* cgraphunit.c (cgraph_function_versioning): Clear also DECL_VIRTUAL_P
	on the copied decl.

	* g++.dg/opt/thunk3.C: New test.

From-SVN: r143973

gcc/ChangeLog

+2009-02-05  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/39106
+	* cgraphunit.c (cgraph_function_versioning): Clear also DECL_VIRTUAL_P
+	on the copied decl.
+
 2009-02-05  Paolo Bonzini  <bonzini@gnu.org>
 
 	PR rtl-optimization/39110

gcc/cgraphunit.c

@@ -1551,10 +1551,11 @@ cgraph_function_versioning (struct cgraph_node *old_version_node,
   TREE_PUBLIC (new_version_node->decl) = 0;
   DECL_COMDAT (new_version_node->decl) = 0;
   DECL_WEAK (new_version_node->decl) = 0;
+  DECL_VIRTUAL_P (new_version_node->decl) = 0;
   new_version_node->local.externally_visible = 0;
   new_version_node->local.local = 1;
   new_version_node->lowered = true;
-  
+
   /* Update the call_expr on the edges to call the new version node. */
   update_call_expr (new_version_node);
   

gcc/testsuite/ChangeLog

+2009-02-05  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/39106
+	* g++.dg/opt/thunk3.C: New test.
+
 2009-02-05  Nick Clifton  <nickc@redhat.com>
 
 	* gcc.c-torture/compile/20080625-1.c: Skip for M32C.

gcc/testsuite/g++.dg/opt/thunk3.C

+// PR c++/39106
+// { dg-do compile }
+// { dg-options "-O2" }
+
+extern "C" void abort ();
+
+struct A
+{
+  A (bool x = true);
+};
+class B
+{
+  virtual bool bar (A &, int) const =0;
+};
+class C : virtual public B
+{
+};
+struct D : virtual public B
+{
+  bool bar (A &, int) const;
+};
+template <int N>
+struct E : public D
+{
+  bool bar (A &x, int y) const
+  {
+    return baz().bar (x, y);
+  }
+  const D & baz () const;
+};
+extern template class E<0>;
+
+void
+foo ()
+{
+  try
+  {
+    A a;
+    abort ();
+  } catch (...)
+  {
+  }
+  A b;
+  E<0> c;
+  c.bar (b, 3);
+  E<0> d;
+  d.bar (b, 3);
+}