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"""
Copyright (c) 2018 Intel Corporation
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
"""
import logging as log
import networkx as nx
from mo.front.common.replacement import FrontReplacementSubgraph
from mo.graph.graph import erase_node
class StandaloneConstEraser(FrontReplacementSubgraph):
enabled = True
@staticmethod
def pattern():
return dict(
nodes=[('const', dict(kind='op', op='Const')),
('output', dict(kind='op', op='OpOutput'))
],
edges=[('const', 'output')],
node_attrs=['kind', 'op'],
edge_attrs=[])
@staticmethod
def replace_sub_graph(graph: nx.MultiDiGraph, match: dict):
if not len(match['const'].in_edges()) and len(match['const'].out_edges()) == 1:
erase_node(match['const'])
erase_node(match['output'])
log.info("Standalone Const node \"{}\" was removed from the graph".format(match['const'].id))
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