ah-cheng opened a new pull request, #11034:
URL: https://github.com/apache/tvm/pull/11034

   Hi, my onnx model is superpoint. it`s converted  from a pytorch model.
   When I import the model. I get the relay as follow:
   `
   ...
   %38 = transpose(%37, axes=[0, 1, 3, 2, 4]);
   %39 = reshape(%38, newshape=[1, 480, 640]);
   %40 = nn.max_pool2d(%39, pool_size=[9, 9], padding=[4, 4, 4, 4], 
layout="NCW");
   %41 = equal(%39, %40);
   cast(%41, dtype="float32")
   `
   The model layer in Netron is:
   
![image](https://user-images.githubusercontent.com/50271153/163803337-e9cb51ff-363b-4533-915e-5a6d7d39701e.png)
   Then we can see the %39 reshape is a 3 dimensions. It is legal in pytorch 
model. But in ONNX, I will get a error.
   Then I will add a `expand_dims` before pool2D and a squeeze after pool2D 
like the code I commited.
   
   But i don`t know how to add a unit test case. because there will be error in 
onnxruntime if the pool2D  shape is 3D.
   
![image](https://user-images.githubusercontent.com/50271153/163803954-d1987128-f4dd-4ce4-96ad-2a04842b5ed6.png)
   
   cc: @MatthewARM @jwfromm @AndrewZhaoLuo 
   
   
   
   


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