always split type tuple literals in isinstance() calls to speed up each type test separately

Cython/Compiler/Optimize.py

@@ -2276,11 +2276,14 @@ class OptimizeBuiltinCalls(Visitor.NodeRefCleanupMixin,
         if len(pos_args) != 2:
             return node
         arg, types = pos_args
-        temp = None
+        temps = []
         if isinstance(types, ExprNodes.TupleNode):
             types = types.args
+            if len(types) == 1 and not types[0].type is Builtin.type_type:
+                return node  # nothing to improve here
             if arg.is_attribute or not arg.is_simple():
-                arg = temp = UtilNodes.ResultRefNode(arg)
+                arg = UtilNodes.ResultRefNode(arg)
+                temps.append(arg)
         elif types.type is Builtin.type_type:
             types = [types]
         else:
@@ -2311,12 +2314,16 @@ class OptimizeBuiltinCalls(Visitor.NodeRefCleanupMixin,
                 type_check_function = '__Pyx_TypeCheck'
                 type_check_args = [arg, test_type_node]
             else:
-                return node
+                if not test_type_node.is_literal:
+                    test_type_node = UtilNodes.ResultRefNode(test_type_node)
+                    temps.append(test_type_node)
+                type_check_function = 'PyObject_IsInstance'
+                type_check_args = [arg, test_type_node]
             test_nodes.append(
                 ExprNodes.PythonCapiCallNode(
                     test_type_node.pos, type_check_function, self.Py_type_check_func_type,
-                    args = type_check_args,
-                    is_temp = True,
+                    args=type_check_args,
+                    is_temp=True,
                 ))
 
         def join_with_or(a, b, make_binop_node=ExprNodes.binop_node):
@@ -2326,7 +2333,7 @@ class OptimizeBuiltinCalls(Visitor.NodeRefCleanupMixin,
             return or_node
 
         test_node = reduce(join_with_or, test_nodes).coerce_to(node.type, env)
-        if temp is not None:
+        for temp in temps[::-1]:
             test_node = UtilNodes.EvalWithTempExprNode(temp, test_node)
         return test_node
 

tests/run/isinstance.pyx

@@ -5,6 +5,10 @@ from cpython.bool cimport bool
 cdef class A:
     pass
 
+
+a_as_obj = A
+
+
 @cython.test_assert_path_exists('//SimpleCallNode//SimpleCallNode')
 @cython.test_fail_if_path_exists('//SimpleCallNode//PythonCapiCallNode',
                                  '//PythonCapiCallNode//SimpleCallNode')
@@ -18,6 +22,7 @@ def test_non_optimised():
     assert isinstance(A(), foo)
     return True
 
+
 @cython.test_assert_path_exists('//PythonCapiCallNode',
                                 '//PythonCapiCallNode//SimpleCallNode',
                                 '//PythonCapiFunctionNode[@cname = "PyType_Check"]',
@@ -104,6 +109,7 @@ def test_optimised():
     assert isinstance(A(), <type>untyped_type)
     return True
 
+
 @cython.test_assert_path_exists('//PythonCapiCallNode')
 @cython.test_fail_if_path_exists('//SimpleCallNode//SimpleCallNode',
                                  '//SimpleCallNode//PythonCapiCallNode',
@@ -116,10 +122,14 @@ def test_optimised_tuple():
     assert isinstance(int(),   (int, long, float, bytes, str, unicode, tuple, list, dict, set, slice, type, A))
     assert isinstance(list(),  (int, long, float, bytes, str, unicode, tuple, list, dict, set, slice, type, A))
     assert isinstance(A(),  (int, long, float, bytes, str, unicode, tuple, list, dict, set, slice, type, A))
+    assert isinstance(A(),  (int, long, float, bytes, str, unicode, tuple, list, dict, set, slice, type, A, a_as_obj))
+    assert isinstance(A(),  (int, long, float, bytes, str, unicode, tuple, list, dict, set, slice, type, a_as_obj, A))
+    assert isinstance(A(),  (int, long, float, bytes, str, unicode, a_as_obj, tuple, list, dict, set, slice, type, A))
     assert isinstance(0, (int, long))
     assert not isinstance(u"xyz", (int, long))
     return True
 
+
 def test_custom():
     """
     >>> test_custom()
@@ -134,6 +144,11 @@ cdef class B:
 cdef class C:
     pass
 
+
+@cython.test_assert_path_exists('//PythonCapiCallNode')
+@cython.test_fail_if_path_exists('//SimpleCallNode//SimpleCallNode',
+                                 '//SimpleCallNode//PythonCapiCallNode',
+                                 '//TupleNode//NameNode')
 def test_custom_tuple(obj):
     """
     >>> test_custom_tuple(A())
@@ -145,6 +160,7 @@ def test_custom_tuple(obj):
     """
     return isinstance(obj, (A,B))
 
+
 def test_nested(x):
     """
     >>> test_nested(1)