Eliminate one indirection for 'PyType_IsSubtype'.

Author: fangerer

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/modules/TruffleCextBuiltins.java

@@ -126,6 +126,7 @@
 import com.oracle.graal.python.nodes.attributes.ReadAttributeFromObjectNode;
 import com.oracle.graal.python.nodes.attributes.WriteAttributeToObjectNode;
 import com.oracle.graal.python.nodes.call.PythonCallNode;
+import com.oracle.graal.python.nodes.classes.IsSubtypeNode;
 import com.oracle.graal.python.nodes.expression.BinaryComparisonNode;
 import com.oracle.graal.python.nodes.function.BuiltinFunctionRootNode;
 import com.oracle.graal.python.nodes.function.PythonBuiltinBaseNode;
@@ -2043,4 +2044,19 @@ long doGeneric(Object n) {
             return asPrimitiveNode.executeLong(n, 0, Long.BYTES);
         }
     }
+
+    @Builtin(name = "PyType_IsSubtype", fixedNumOfPositionalArgs = 2)
+    @GenerateNodeFactory
+    abstract static class PyType_IsSubtype extends PythonBinaryBuiltinNode {
+        @Child private IsSubtypeNode isSubtypeNode = IsSubtypeNode.create();
+
+        @Specialization
+        int doI(PythonClass a, PythonClass b) {
+            if (isSubtypeNode.execute(a, b)) {
+                return 1;
+            }
+            return 0;
+        }
+    }
+
 }

graalpython/lib-graalpython/python_cext.py

@@ -808,11 +808,6 @@ def PyObject_Repr(o):
     return repr(o)
 
 
-@may_raise(-1)
-def PyType_IsSubtype(a, b):
-    return 1 if issubclass(a, b) else 0
-
-
 def PyTuple_New(size):
     return (None,) * size