38 lines
1.3 KiB
Python
38 lines
1.3 KiB
Python
"""
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Copyright (c) 2018 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 networkx as nx
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from mo.graph.graph import erase_node, Node
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from mo.middle.passes.eliminate import remove_op_node
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from mo.middle.replacement import MiddleReplacementPattern
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class ConstSwitchEraser(MiddleReplacementPattern):
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"""
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Erases switch operation and its constant input after data and control flow infer
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"""
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enabled = True
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def find_and_replace_pattern(self, graph: nx.MultiDiGraph):
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for n in nx.topological_sort(graph):
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if graph.node[n]['kind'] == 'data' or graph.node[n]['op'] != 'Switch':
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continue
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switch_op_node = Node(graph, n)
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pred_id_data_node = switch_op_node.in_node(1)
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erase_node(pred_id_data_node)
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remove_op_node(graph, switch_op_node)
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