45 lines
1.5 KiB
Python
45 lines
1.5 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.middle.ConstSwitchResolver import ConstSwitchEraser
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from mo.graph.graph import Graph
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from mo.middle.passes.eliminate import remove_op_node_with_data_node
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from mo.middle.replacement import MiddleReplacementPattern
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class UselessMergeEraser(MiddleReplacementPattern):
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enabled = True
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def run_after(self):
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return [ConstSwitchEraser]
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def run_before(self):
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from extensions.middle.pass_separator import MiddleFinish
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return [MiddleFinish]
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def pattern(self):
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return dict(
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nodes=[('merge', dict(kind='op', op='Merge'))],
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edges=[]
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)
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def replace_pattern(self, graph: Graph, match: dict):
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if len(graph.in_edges(match['merge'].id)) <= 1:
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remove_op_node_with_data_node(graph, match['merge'], list(match['merge'].in_nodes().values())[0])
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log.info("Useles Merge op and data nodes was deleted op='{}'".format(match['merge'].id))
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