[Transform] preserve scalar odt in MoveScalarLinearPastInvariants

src/finn/transformation/streamline/reorder.py

@@ -545,6 +545,7 @@ class MoveScalarLinearPastInvariants(Transformation):
                     # move prod0 from input to output,
                     old_prod0_in = prod0.input[0]
                     old_prod0_out = prod0.output[0]
+                    scalar_op_odt = model.get_tensor_datatype(old_prod0_out)
                     old_n_out = n.output[0]
                     in_shape = model.get_tensor_shape(n.input[0])
                     out_shape = model.get_tensor_shape(n.output[0])
@@ -555,6 +556,8 @@ class MoveScalarLinearPastInvariants(Transformation):
                     model.set_tensor_shape(n.input[0], in_shape)
                     model.set_tensor_shape(n.output[0], out_shape)
                     model.set_tensor_shape(prod0.output[0], out_shape)
+                    model.set_tensor_datatype(prod0.output[0], scalar_op_odt)
+                    model.set_tensor_datatype(n.output[0], DataType.FLOAT32)
                     graph.node.remove(prod0)
                     graph.node.insert(node_ind - 1, prod0)
                     graph_modified = True