[Bug] Value None in attribute "mode" of operator Upsample is not valid

[jikechao]

Actual behavior

tvm.error.OpAttributeInvalid: Value None in attribute "mode" of operator Upsample is not valid.

Environment

Any environment details, such as: Operating System, TVM version, etc

Steps to reproduce

def test_upsample_nearest(target='llvm', dev=tvm.cpu(0)):
    """test_upsample_nearest"""
    scale = 2
    in_shape = (1, 1, 3, 3)
    out_shape = (1, 1, 3 * scale, 3 * scale)
    #y = helper.make_node("Upsample", ["in"], ["out"], mode="nearest", scales=[1.0, 1.0, 2.0, 2.0])
    y = helper.make_node("Upsample", ["in"], ["out"], scales=[1.0, 1.0, 2.0, 2.0])

    in_array = np.random.uniform(size=in_shape).astype(np.float32)

    graph = helper.make_graph(
        [y],
        "upsample_nearest_test",
        inputs=[helper.make_tensor_value_info("in", TensorProto.FLOAT, list(in_shape))],
        outputs=[helper.make_tensor_value_info("out", TensorProto.FLOAT, list(out_shape))],
    )

    model = helper.make_model(graph, producer_name="upsample_nearest_test")
    verify_with_ort_with_inputs(model, [in_array], [out_shape], opset=7, target=target, dev=dev)

Triage

• frontend:onnx
• needs-triage

Analysis

The attribute "mode" in the operator Upsample is an optional attribute with the default value "nearest".
Thus, the value "None "should be considered as "nearest".