IVGCVSW-4483 Remove boost::polymorphic_downcast

 * exchange boost::polymorphic_downcast with armnn::PolymorphicDowncast
 * remove unnecessary includes of boost::polymorphic_downcast

Signed-off-by: Jan Eilers <jan.eilers@arm.com>
Change-Id: Ie603fb82860fe05fee547dc78073230cc62b2e1f

1 files changed, 3 insertions, 2 deletions

diff --git a/src/armnn/optimizations/OptimizeInversePermutes.hpp b/src/armnn/optimizations/OptimizeInversePermutes.hpp
index 98e87c36c6..fe0b312ce0 100644
--- a/src/armnn/optimizations/OptimizeInversePermutes.hpp
+++ b/src/armnn/optimizations/OptimizeInversePermutes.hpp
@@ -7,6 +7,7 @@
 #include "Optimization.hpp"
 
 #include <armnn/utility/IgnoreUnused.hpp>
+#include <armnn/utility/PolymorphicDowncast.hpp>
 
 namespace armnn
 {
@@ -23,9 +24,9 @@ public:
     {
         IgnoreUnused(graph);
         Layer& base = connection.GetConnectedOutputSlot()->GetOwningLayer();
-        auto child = boost::polymorphic_downcast<PermuteType*>(&connection.GetOwningLayer());
+        auto child = PolymorphicDowncast<PermuteType*>(&connection.GetOwningLayer());
 
-        if (child->IsInverse(*boost::polymorphic_downcast<PermuteType*>(&base)))
+        if (child->IsInverse(*PolymorphicDowncast<PermuteType*>(&base)))
         {
             // Bypass both layers. Child will be removed as it's left unconnected.
             // Base layer will be removed if left unconnected.