Fix

Author: co63oc

python/paddle/nn/functional/common.py

@@ -1959,11 +1959,8 @@ def pad(
     ], f"mode should be one of constant, reflect, replicate, circular, but got {mode}."
 
     x_dim = len(x.shape)
-    if in_dynamic_or_pir_mode():
-        if (
-            isinstance(pad, (Variable, pir.Value, paddle.Tensor))
-            and pad.size == 0
-        ):
+    if in_dynamic_mode():
+        if isinstance(pad, (Variable, paddle.Tensor)) and pad.size == 0:
             return x.clone()
     if (
         mode == "constant"