skip tied constant folding

onnxslim/onnx_graphsurgeon/ir/graph.py

@@ -957,7 +957,7 @@ def all_tensors_const(tensors):
                     graph_constants.update({out.name: out for out in node.outputs})
             return graph_constants
 
-        graph_constants = {name: tensor for name, tensor in clone_tensors.items() if isinstance(tensor, Constant)}
+        graph_constants = {name: tensor for name, tensor in clone_tensors.items() if (isinstance(tensor, Constant) and len(tensor.outputs) == 1)}
         graph_constants = update_foldable_outputs(graph_constants)
 
         # Pass 4: Shape Folding