IVGCVSW-5272 'Update ConvertLstm function to use ShapeInferenceMethod'

* Enabled Dynamic Tensors on LSTM operator

Signed-off-by: Sadik Armagan <sadik.armagan@arm.com>
Change-Id: I9cae539559570a44088a986870d3d3e41aee9468

1 files changed, 19 insertions, 21 deletions

diff --git a/ConversionUtils.hpp b/ConversionUtils.hpp
index cdb57d1f..fe8e026e 100644
--- a/ConversionUtils.hpp
+++ b/ConversionUtils.hpp
@@ -1399,7 +1399,8 @@ bool SetupAndTrackLayerOutputSlot(const HalOperation& operation,
                                   const HalModel& model,
                                   ConversionData& data,
                                   const armnn::TensorInfo* overrideOutputInfo = nullptr,
-                                  const std::function <void (const armnn::TensorInfo&, bool&)>& validateFunc = nullptr)
+                                  const std::function <void (const armnn::TensorInfo&, bool&)>& validateFunc = nullptr,
+                                  bool inferOutputShapes = false)
 {
     using HalOperand = typename HalPolicy::Operand;
 
@@ -1410,7 +1411,6 @@ bool SetupAndTrackLayerOutputSlot(const HalOperation& operation,
     }
 
     armnn::IOutputSlot& outputSlot = layer.GetOutputSlot(layerOutputIndex);
-
     if (overrideOutputInfo == nullptr)
     {
         outputSlot.SetTensorInfo(GetTensorInfoForOperand(*outputOperand));
@@ -1420,32 +1420,30 @@ bool SetupAndTrackLayerOutputSlot(const HalOperation& operation,
         outputSlot.SetTensorInfo(*overrideOutputInfo);
     }
 
-    // Type one dynamic tensors require the previous layer's output shape for inference
-    if (!layer.GetInputSlot(0).GetConnection() &&
-        IsDynamicTensor(outputSlot.GetTensorInfo()))
-    {
-        return false;
-    }
-
     bool isSupported = false;
-    if (validateFunc &&
-        layer.GetInputSlot(0).GetConnection() &&
-        IsDynamicTensor(outputSlot.GetTensorInfo()))
+    if (validateFunc && (IsDynamicTensor(outputSlot.GetTensorInfo()) || inferOutputShapes))
     {
+        // Type one dynamic tensors require the previous layer's output shape for inference
+        for (unsigned int inputSlotIndex = 0; inputSlotIndex < layer.GetNumInputSlots(); ++inputSlotIndex)
+        {
+            if(!layer.GetInputSlot(inputSlotIndex).GetConnection())
+            {
+                return false;
+            }
+        }
         // IsTensorInfoSet will infer the dynamic output shape
         outputSlot.IsTensorInfoSet();
         // Once the shape is inferred we can validate it
         validateFunc(outputSlot.GetTensorInfo(), isSupported);
 
-       if(!isSupported)
-       {
-           for (unsigned int inputSlotIndex = 0; inputSlotIndex < layer.GetNumInputSlots(); ++inputSlotIndex)
-           {
-               layer.GetInputSlot(inputSlotIndex).GetConnection()->Disconnect(layer.GetInputSlot(inputSlotIndex));
-           }
-
-           return false;
-       }
+        if(!isSupported)
+        {
+            for (unsigned int inputSlotIndex = 0; inputSlotIndex < layer.GetNumInputSlots(); ++inputSlotIndex)
+            {
+                layer.GetInputSlot(inputSlotIndex).GetConnection()->Disconnect(layer.GetInputSlot(inputSlotIndex));
+            }
+            return false;
+        }
     }
 
     const uint32_t operandIndex = operation.outputs[operationOutputIndex];