1/*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19
20/*!
21 * \file src/relay/collage/dataflow_graph.cc
22 * \brief A representation of the dataflow for an overall Relay expression.
23 */
24
25#include "./dataflow_graph.h"
26
27namespace tvm {
28namespace relay {
29namespace collage {
30
31DataflowGraph::DataflowGraph(Expr expr) : expr_(std::move(expr)) {
32 indexed_graph_ = CreateIndexedGraph(expr_);
33 downstream_map_.reserve(indexed_graph_->size());
34 for (PostDfsIndex index = 0; index < indexed_graph_->size(); ++index) {
35 const Node* node = indexed_graph_->index_to_node(index);
36 std::unordered_set<const Node*> downstream_nodes;
37 node->AccumulateDownstreamNodes(&downstream_nodes);
38 IndexSet index_set(indexed_graph_->size());
39 for (const Node* downstream_node : downstream_nodes) {
40 index_set.Add(downstream_node->index_);
41 }
42 downstream_map_.emplace_back(std::move(index_set));
43 }
44}
45
46} // namespace collage
47} // namespace relay
48} // namespace tvm
49