1 files changed, 63 insertions, 0 deletions
diff --git a/src/graph2/mutators/InPlaceOperationMutator.cpp b/src/graph2/mutators/InPlaceOperationMutator.cpp
new file mode 100644
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+++ b/src/graph2/mutators/InPlaceOperationMutator.cpp
@@ -0,0 +1,63 @@
+/*
+ * 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/InPlaceOperationMutator.h"
+
+#include "arm_compute/graph2/Graph.h"
+#include "arm_compute/graph2/Logger.h"
+
+namespace arm_compute
+{
+namespace graph2
+{
+const char *InPlaceOperationMutator::name()
+{
+    return "InPlaceOperationMutator";
+}
+
+void InPlaceOperationMutator::mutate(Graph &g)
+{
+    std::set<NodeType> in_place_nodes = { NodeType::BatchNormalizationLayer, NodeType::ActivationLayer };
+
+    // Not interested in the order of nodes
+    for(auto &node : g.nodes())
+    {
+        if(node && in_place_nodes.find(node->type()) != std::end(in_place_nodes))
+        {
+            // Get input edge
+            Edge *input_edge = node->input_edge(0);
+
+            // Check if parent has a single output if yes then force in place calculation else not
+            if((input_edge != nullptr) && (input_edge->producer() != nullptr) && (input_edge->producer()->output_edges().size() == 1))
+            {
+                ARM_COMPUTE_LOG_GRAPH_VERBOSE("Switching to in-place computation for the node with ID : "
+                                              << node->id() << " and name : " << node->name() << std::endl);
+                // Update output
+                auto tensor = input_edge->tensor();
+                node->set_output_tensor(tensor->id(), 0);
+            }
+        }
+    }
+}
+} // namespace graph2
+} // namespace arm_compute