mbrookhart commented on a change in pull request #9126:
URL: https://github.com/apache/tvm/pull/9126#discussion_r716888182



##########
File path: python/tvm/relay/frontend/paddlepaddle.py
##########
@@ -138,12 +273,22 @@ def convert_conv2d(g, op, block):
     kernel = g.get_node(op.input("Filter")[0])
     input_x = g.get_node(op.input("Input")[0])
     out_channels, _, k_h, k_w = infer_shape(kernel)
-    in_h, in_w = infer_shape(input_x)[2:]
     if padding_algorithm == "VALID":
         paddings = [0, 0]
     elif padding_algorithm == "SAME":
-        pad_h = _get_pad_size(in_h, (k_h - 1) * dilations[0] + 1, strides[0])
-        pad_w = _get_pad_size(in_w, (k_w - 1) * dilations[1] + 1, strides[1])
+        if strides[0] == 1 and strides[1] == 1:
+            pad_h = _get_pad_size(0, (k_h - 1) * dilations[0] + 1, strides[0])
+            pad_w = _get_pad_size(0, (k_w - 1) * dilations[1] + 1, strides[1])
+        else:
+            input_shape = shape_of(input_x)
+            h_w = _op.strided_slice(input_shape, [2], [4])
+            try:
+                in_h, in_w = infer_value(h_w, g.get_params()).numpy().tolist()
+            except Exception as e:
+                msg = "Dynamic shape is not supported in SAME padding 
algorithm while stride!=1"
+                raise tvm.error.OpAttributeInvalid(msg) from e

Review comment:
       Just as a heads up, I supported `SAME` padding in the ONNX frontend with 
dynamic shapes here: 
https://github.com/apache/tvm/blob/d0c6ca5cacae8dcae26e26287d6d2a270ab6127c/python/tvm/relay/frontend/onnx.py#L412-L472
   
   It's fairly complicate, I'm totally cool if you want to punt on that until 
you need it.

##########
File path: python/tvm/relay/frontend/paddlepaddle.py
##########
@@ -138,12 +273,22 @@ def convert_conv2d(g, op, block):
     kernel = g.get_node(op.input("Filter")[0])
     input_x = g.get_node(op.input("Input")[0])
     out_channels, _, k_h, k_w = infer_shape(kernel)
-    in_h, in_w = infer_shape(input_x)[2:]
     if padding_algorithm == "VALID":
         paddings = [0, 0]
     elif padding_algorithm == "SAME":
-        pad_h = _get_pad_size(in_h, (k_h - 1) * dilations[0] + 1, strides[0])
-        pad_w = _get_pad_size(in_w, (k_w - 1) * dilations[1] + 1, strides[1])
+        if strides[0] == 1 and strides[1] == 1:
+            pad_h = _get_pad_size(0, (k_h - 1) * dilations[0] + 1, strides[0])
+            pad_w = _get_pad_size(0, (k_w - 1) * dilations[1] + 1, strides[1])
+        else:
+            input_shape = shape_of(input_x)
+            h_w = _op.strided_slice(input_shape, [2], [4])
+            try:
+                in_h, in_w = infer_value(h_w, g.get_params()).numpy().tolist()
+            except Exception as e:
+                msg = "Dynamic shape is not supported in SAME padding 
algorithm while stride!=1"
+                raise tvm.error.OpAttributeInvalid(msg) from e

Review comment:
       Just as a heads up, I supported `SAME` padding in the ONNX frontend with 
dynamic shapes here: 
https://github.com/apache/tvm/blob/d0c6ca5cacae8dcae26e26287d6d2a270ab6127c/python/tvm/relay/frontend/onnx.py#L412-L472
   
   It's fairly complicated, I'm totally cool if you want to punt on that until 
you need it.




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