commit 4cc341cf8b5a6e6bb0543504cbbfde6fa11a2cdb
author Mike Kelly <mike.kelly@arm.com> Fri Jul 07 15:43:06 2023 +0100
committer Mike Kelly <mike.kelly@arm.com> Fri Jul 14 00:00:53 2023 +0100
tree 7cac128e9ec6f2fd27f1afdb55f44b870f39e0b3
parent 6963b33221c23af4a8eff19ff4a5773230b0befd

IVGCVSW-7830 Add backend optimizations to remove Reshapes where possible

 * Added optimization to remove reshapes for Neon and Ref Backends
   by using overridden TensorInfos
 * Added ability to delete Subgraphs during Optimization
 * Fixed naming error in NeonEndToEndTests and CLEndToEndTests
 * Added LayerNameAndTypeCheck for testing.
 * Fixed error where layers were not marked as altered when removed in
   CLBackend

Signed-off-by: Mike Kelly <mike.kelly@arm.com>
Change-Id: I1ac25cd4ec9821470d961831ae2c8d24882276cc

src/backends/reference/RefBackend.cpp

diff --git a/src/backends/reference/RefBackend.cpp b/src/backends/reference/RefBackend.cpp
index 8c8879c..02749af 100644
--- a/src/backends/reference/RefBackend.cpp
+++ b/src/backends/reference/RefBackend.cpp
@@ -1,5 +1,5 @@
 //
-// Copyright © 2022 Arm Ltd and Contributors. All rights reserved.
+// Copyright © 2022-2023 Arm Ltd and Contributors. All rights reserved.
 // SPDX-License-Identifier: MIT
 //
 
@@ -16,8 +16,6 @@
 #include <backendsCommon/DefaultAllocator.hpp>
 #include <backendsCommon/SubgraphUtils.hpp>
 
-#include <Optimizer.hpp>
-
 namespace armnn
 {
 
@@ -116,9 +114,16 @@
                 }
             }
         }
+
+        // Remove Reshape where possible
+        if (base.GetType() == LayerType::Reshape)
+        {
+            ReshapeLayer* baseLayer = PolymorphicDowncast<ReshapeLayer*>(&base);
+            RemoveReshapeLayer(baseLayer, untouched, optimizationViews);
+        }
     }
 
-    if (optimizationViews.GetSubstitutions().empty())
+    if (optimizationViews.GetSubstitutions().empty() && optimizationViews.GetDeletedSubgraphs().empty())
     {
         optimizationViews.AddUntouchedSubgraph(SubgraphView(subgraph));
     }