From d9eb27597eabe5b7c17520f4f9b3f8a282d72573 Mon Sep 17 00:00:00 2001
From: Georgios Pinitas <georgios.pinitas@arm.com>
Date: Tue, 3 Apr 2018 13:44:29 +0100
Subject: COMPMID-797: Switch to new graph.

- Cleaned up build system

Change-Id: If2faa27ee5b31fa8b972836960ab3ef671059c8d
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/126435
Tested-by: Jenkins <bsgcomp@arm.com>
Reviewed-by: Pablo Tello <pablo.tello@arm.com>
---
 src/graph/mutators/NodeFusionMutator.cpp | 96 ++++++++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 src/graph/mutators/NodeFusionMutator.cpp

(limited to 'src/graph/mutators/NodeFusionMutator.cpp')

diff --git a/src/graph/mutators/NodeFusionMutator.cpp b/src/graph/mutators/NodeFusionMutator.cpp
new file mode 100644
index 0000000000..2e893c2e07
--- /dev/null
+++ b/src/graph/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/graph/mutators/NodeFusionMutator.h"
+
+#include "arm_compute/graph/Graph.h"
+#include "arm_compute/graph/Logger.h"
+#include "arm_compute/graph/nodes/Nodes.h"
+
+#include "arm_compute/core/utils/misc/Cast.h"
+
+namespace arm_compute
+{
+namespace graph
+{
+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 graph
+} // namespace arm_compute
-- 
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