do not emit type_test_utility_code when type-testing builtin types

diff --git a/Cython/Compiler/ExprNodes.py b/Cython/Compiler/ExprNodes.py
index ba049fff4f7b7754cbe421eaffbdc9719928c911..d9faada43d17432e87f49e3efb66f006fa6f98bc 100644 (file)
--- a/Cython/Compiler/ExprNodes.py
+++ b/Cython/Compiler/ExprNodes.py
@@ -4367,7 +4367,8 @@ class PyTypeTestNode(CoercionNode):
         self.type = dst_type
         self.gil_check(env)
         self.result_ctype = arg.ctype()
-        env.use_utility_code(type_test_utility_code)
+        if not dst_type.is_builtin_type:
+            env.use_utility_code(type_test_utility_code)
 
     gil_message = "Python type test"