1 files changed, 63 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/opt/thunk4.C b/gcc/testsuite/g++.dg/opt/thunk4.C
new file mode 100644
index 00000000000..7dd5ea4338b
--- /dev/null
+++ b/gcc/testsuite/g++.dg/opt/thunk4.C
@@ -0,0 +1,63 @@
+// { dg-do compile }
+// { dg-options "-O1" }
+namespace std __attribute__ ((__visibility__ ("default")))
+{
+  template < class _CharT > struct char_traits;
+}
+namespace std __attribute__ ((__visibility__ ("default")))
+{
+  template < typename _CharT, typename _Traits =
+    char_traits < _CharT > >class basic_iostream;
+}
+
+extern "C++"
+{
+  namespace std
+  {
+    class exception
+    {
+    public:exception () throw ()
+      {
+      }
+    };
+  }
+}
+namespace std __attribute__ ((__visibility__ ("default")))
+{
+  class ios_base
+  {
+  public:class failure:public exception
+    {
+    };
+    virtual ~ ios_base ();
+  };
+template < typename _CharT, typename _Traits > class basic_ios:public
+    ios_base
+  {
+  };
+template < typename _CharT, typename _Traits > class basic_ostream:virtual public basic_ios < _CharT,
+    _Traits
+    >
+  {
+  };
+}
+namespace std __attribute__ ((__visibility__ ("default")))
+{
+template < typename _CharT, typename _Traits > class basic_istream:virtual public basic_ios < _CharT,
+    _Traits
+    >
+  {
+  };
+template < typename _CharT, typename _Traits > class basic_iostream:public basic_istream < _CharT, _Traits >, public basic_ostream < _CharT,
+    _Traits
+    >
+  {
+  };
+  class strstream:public basic_iostream < char >
+  {
+    virtual ~ strstream ();
+  };
+  strstream::~strstream ()
+  {
+  }
+}