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Diffstat (limited to 'src/graph2/mutators/NodeFusionMutator.cpp')
| -rw-r--r-- | src/graph2/mutators/NodeFusionMutator.cpp | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/src/graph2/mutators/NodeFusionMutator.cpp b/src/graph2/mutators/NodeFusionMutator.cpp new file mode 100644 index 0000000000..d0ab3e7e6b --- /dev/null +++ b/src/graph2/mutators/NodeFusionMutator.cpp @@ -0,0 +1,96 @@ +/* + * Copyright (c) 2018 ARM Limited. + * + * SPDX-License-Identifier: MIT + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ +#include "arm_compute/graph2/mutators/NodeFusionMutator.h" + +#include "arm_compute/graph2/Graph.h" +#include "arm_compute/graph2/Logger.h" +#include "arm_compute/graph2/nodes/Nodes.h" + +#include "arm_compute/core/utils/misc/Cast.h" + +namespace arm_compute +{ +namespace graph2 +{ +namespace detail +{ +void fuse_batch_norm_with_activation(Graph &g) +{ + // Not interested in the order of nodes + for(auto &node : g.nodes()) + { + // Check if the node is batch norm and not a branching node + if(node && node->type() == NodeType::BatchNormalizationLayer && node->output_edges().size() == 1) + { + auto output_edge_id = *node->output_edges().begin(); + auto output_edge = g.edge(output_edge_id); + // Check if following node is an activation layer node + if((output_edge != nullptr) && (output_edge->consumer() != nullptr) && (output_edge->consumer()->type() == NodeType::ActivationLayer)) + { + ARM_COMPUTE_LOG_GRAPH_VERBOSE("Fusing Batch Normalization node with ID : " << output_edge->producer_id() + << " with Activation Layer node with ID : " << output_edge->consumer_id() << std::endl); + + auto *bn_node = arm_compute::utils::cast::polymorphic_downcast<BatchNormalizationLayerNode *>(output_edge->producer()); + auto *act_node = arm_compute::utils::cast::polymorphic_downcast<ActivationLayerNode *>(output_edge->consumer()); + + // Get driving nodes of activation node + std::vector<NodeIdxPair> act_driving_nodes; + for(auto &act_output_edge_id : act_node->output_edges()) + { + auto act_output_edge = g.edge(act_output_edge_id); + if(act_output_edge != nullptr) + { + ARM_COMPUTE_ERROR_ON(act_output_edge->consumer() == nullptr); + act_driving_nodes.push_back({ act_output_edge->consumer_id(), act_output_edge->consumer_idx() }); + } + } + + // Set activation info to batch normalization + bn_node->set_fused_activation(act_node->activation_info()); + + // Remove activation node + g.remove_node(act_node->id()); + + // Update batch normalization node outputs + for(auto &driving_node : act_driving_nodes) + { + g.add_connection(bn_node->id(), 0, driving_node.node_id, driving_node.index); + } + } + } + } +} +} // namespace detail + +const char *NodeFusionMutator::name() +{ + return "NodeFusionMutator"; +} + +void NodeFusionMutator::mutate(Graph &g) +{ + detail::fuse_batch_norm_with_activation(g); +} +} // namespace graph2 +} // namespace arm_compute |