IVGCVSW-6298 'IMemoryOptimizerStrategy Add declarations and constant layer strategy'

* Added IMemoryOptimizerStrategy interface
* Added ConstLayerMemoryOptimizer strategy

Signed-off-by: Sadik Armagan <sadik.armagan@arm.com>
Change-Id: I6a92e659379e5cc39c375b669678eee8a8c08c20

1 files changed, 43 insertions, 0 deletions

diff --git a/src/backends/backendsCommon/memoryOptimizationStrategies/ConstLayerMemoryOptimizerStrategy.cpp b/src/backends/backendsCommon/memoryOptimizationStrategies/ConstLayerMemoryOptimizerStrategy.cpp
new file mode 100644
index 0000000000..8abf32c096
--- /dev/null
+++ b/src/backends/backendsCommon/memoryOptimizationStrategies/ConstLayerMemoryOptimizerStrategy.cpp
@@ -0,0 +1,43 @@
+//
+// Copyright © 2021 Arm Ltd and Contributors. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#include "ConstLayerMemoryOptimizerStrategy.hpp"
+
+namespace armnn
+{
+
+std::string ConstLayerMemoryOptimizerStrategy::GetName() const
+{
+    return m_Name;
+}
+
+MemBlockStrategyType ConstLayerMemoryOptimizerStrategy::GetMemBlockStrategyType() const
+{
+    return m_MemBlockStrategyType;
+}
+
+// A IMemoryOptimizerStrategy must ensure that
+// 1: All MemBlocks have been assigned to a MemBin
+// 2: No MemBlock is assigned to multiple MemBins
+// 3: No two MemBlocks in a MemBin overlap in the X dimension
+std::vector<MemBin> ConstLayerMemoryOptimizerStrategy::Optimize(std::vector<MemBlock>& memBlocks)
+{
+    std::vector<MemBin> memBins;
+    memBins.reserve(memBlocks.size());
+
+    for (auto& memBlock : memBlocks)
+    {
+        MemBin memBin;
+        memBin.m_MemSize = memBlock.m_MemSize;
+        memBin.m_MemBlocks.reserve(1);
+        memBlock.m_Offset = 0;
+        memBin.m_MemBlocks.push_back(memBlock);
+        memBins.push_back(memBin);
+    }
+
+    return memBins;
+}
+
+} // namespace armnn
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