PyNative peformance optimize. Avoid calls constexpr InferShape

mindspore/ops/primitive.py

@@ -537,6 +537,9 @@ def constexpr(fn=None, get_instance=True, name=None):
 
     def deco(fn):
         class CompileOp(PrimitiveWithInfer):
+            """
+            CompileOp is a temporary operator used to execute the constexpr function.
+            """
             def __init__(self):
                 op_name = name if name else fn.__name__
                 PrimitiveWithInfer.__init__(self, op_name)
@@ -545,6 +548,9 @@ def constexpr(fn=None, get_instance=True, name=None):
             def infer_value(self, *args):
                 return fn(*args)
 
+            def __call__(self, *args, **kwargs):
+                return fn(*args)
+
         if get_instance:
             return CompileOp()
         return CompileOp