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Diffstat (limited to 'src/armnn/optimizations/OptimizeInversePermutes.hpp')
-rw-r--r-- | src/armnn/optimizations/OptimizeInversePermutes.hpp | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/src/armnn/optimizations/OptimizeInversePermutes.hpp b/src/armnn/optimizations/OptimizeInversePermutes.hpp new file mode 100644 index 0000000000..63820cb7d3 --- /dev/null +++ b/src/armnn/optimizations/OptimizeInversePermutes.hpp @@ -0,0 +1,40 @@ +// +// Copyright © 2017 Arm Ltd. All rights reserved. +// See LICENSE file in the project root for full license information. +// +#pragma once + +#include "Optimization.hpp" + +namespace armnn +{ +namespace optimizations +{ + +class OptimizeInversePermutesImpl +{ +public: + /// Run for every connection between a base PermuteLayer and a child PermuteLayer. + /// Bypasses both layers for that connection if one is the inverse of the other. + void Run(Graph& graph, InputSlot& connection) const + { + Layer& base = connection.GetConnectedOutputSlot()->GetOwningLayer(); + auto child = boost::polymorphic_downcast<PermuteLayer*>(&connection.GetOwningLayer()); + + if (child->IsInverse(*boost::polymorphic_downcast<PermuteLayer*>(&base))) + { + // Bypass both layers. Child will be removed as it's left unconnected. + // Base layer will be removed if left unconnected. + child->GetOutputSlot().MoveAllConnections(*base.GetInputSlot(0).GetConnectedOutputSlot()); + } + } + +protected: + OptimizeInversePermutesImpl() = default; + ~OptimizeInversePermutesImpl() = default; +}; + +using OptimizeInversePermutes = OptimizeForConnection<PermuteLayer, PermuteLayer, OptimizeInversePermutesImpl>; + +} // namespace optimizations +} // namespace armnn |