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[InferDataLayouts] Add fallback for layout propagation #145

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[InferDataLayouts] Add fallback for layout propagation #145

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20 changes: 17 additions & 3 deletions src/qonnx/transformation/infer_data_layouts.py
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Original file line number Diff line number Diff line change
Expand Up @@ -62,9 +62,23 @@ def _dims_to_layout(model, node, ndims):
else:
return DataLayout.UNKNOWN
else:
# propagate input layout to output
# TODO this won't work for concat, squeeze/unsqueeze/reshape...
return model.get_tensor_layout(node.input[0])
# Check whether there is a layout annotation for the first input
# TODO: There are multi-input operations, why should the first
# determine the output layout?
if layout := model.get_tensor_layout(node.input[0]):
# If annotation present: propagate input layout to output
# TODO: this won't work for concat, squeeze/unsqueeze/reshape...
return layout
# Fallback to the same defaults as for the FINN-Ops above
else:
if ndims == 4:
return DataLayout.NHWC
elif ndims == 3:
return DataLayout.NWC
elif ndims == 2:
return DataLayout.NC
else:
return DataLayout.UNKNOWN


def _infer_node_data_layout(model, node):
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