47 lines
1.6 KiB
Python
47 lines
1.6 KiB
Python
"""
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Copyright (C) 2018-2020 Intel Corporation
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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"""
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import logging as log
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from extensions.back.ResultNormalizer import ResultNormalizer
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from mo.back.replacement import BackReplacementPattern
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from mo.graph.graph import Graph
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class UselessConcatRemoval(BackReplacementPattern):
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"""
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Transformation looks for the Concat nodes with just one input and remove them from the graph.
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"""
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enabled = True
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run_not_recursively = True
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def run_before(self):
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return [ResultNormalizer]
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@staticmethod
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def pattern():
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return dict(
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nodes=[('concat', {'kind': 'op', 'type': 'Concat'})],
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edges=[],
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)
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@staticmethod
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def replace_pattern(graph: Graph, match: dict):
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concat_node = match['concat']
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connected_ports = [port for port in concat_node.in_ports().values() if not port.disconnected()]
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if len(connected_ports) == 1:
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log.debug('Concat node {} has just one input. Removing it.'.format(concat_node.name))
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concat_node.out_port(0).get_connection().set_source(connected_ports[0].get_connection().get_source())
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