Add gdb.Type.optimized_out method.

gdb/ChangeLog:

	* NEWS: Mention gdb.Type.optimized_out method.
	* python/py-type.c (typy_optimized_out):  New function.

gdb/doc/ChangeLog:

	* python.texi: New method documented.

gdb/testsuite/ChangeLog:

	* gdb.python/py-type.exp: New test.

gdb/python/py-type.c

@@ -1181,6 +1181,16 @@ typy_nonzero (PyObject *self)
   return 1;
 }
 
+/* Return optimized out value of this type.  */
+
+static PyObject *
+typy_optimized_out (PyObject *self, PyObject *args)
+{
+  struct type *type = ((type_object *) self)->type;
+
+  return value_to_value_object (allocate_optimized_out_value (type));
+}
+
 /* Return a gdb.Field object for the field named by the argument.  */
 
 static PyObject *
@@ -1493,6 +1503,9 @@ They are first class values." },
   { "const", typy_const, METH_NOARGS,
     "const () -> Type\n\
 Return a const variant of this type." },
+  { "optimized_out", typy_optimized_out, METH_NOARGS,
+    "optimized_out() -> Value\n\
+Return optimized out value of this type." },
   { "fields", typy_fields, METH_NOARGS,
     "fields () -> list\n\
 Return a list holding all the fields of this type.\n\