From 3570a3896d629a41c4e032880fca193c333dd3cf Mon Sep 17 00:00:00 2001
From: Francis Murtagh <francis.murtagh@arm.com>
Date: Wed, 18 May 2022 11:46:10 +0100
Subject: BugFix: Overload Deprecated IsUnidirectionalSequenceLstmSupported

 * Signature change is ABI/API break, overloaded and forwarded to new function.

Signed-off-by: Francis Murtagh <francis.murtagh@arm.com>
Change-Id: I8590a6fd65986b5aeff905c1e761cb5c51042e99
---
 include/armnn/BackendHelper.hpp | 13 +++++++++++++
 src/armnn/BackendHelper.cpp     | 26 ++++++++++++++++++++++++++
 2 files changed, 39 insertions(+)

diff --git a/include/armnn/BackendHelper.hpp b/include/armnn/BackendHelper.hpp
index 8bcdbc4d3c..87b99f03f0 100644
--- a/include/armnn/BackendHelper.hpp
+++ b/include/armnn/BackendHelper.hpp
@@ -411,6 +411,19 @@ public:
                               const TransposeDescriptor& descriptor,
                               Optional<std::string&> reasonIfUnsupported = EmptyOptional());
 
+    ARMNN_DEPRECATED_MSG_REMOVAL_DATE("This function has been deprecated, please use function without "
+                                      "Optional TensorInfos", "23.02")
+    bool IsUnidirectionalSequenceLstmSupported(
+            const TensorInfo& input,
+            const TensorInfo& outputStateIn,
+            const TensorInfo& cellStateIn,
+            const TensorInfo& output,
+            const Optional<TensorInfo>& hiddenStateOutput,
+            const Optional<TensorInfo>& cellStateOutput,
+            const LstmDescriptor& descriptor,
+            const LstmInputParamsInfo& paramsInfo,
+            Optional<std::string&> reasonIfUnsupported = EmptyOptional());
+
     bool IsUnidirectionalSequenceLstmSupported(
         const TensorInfo& input,
         const TensorInfo& outputStateIn,
diff --git a/src/armnn/BackendHelper.cpp b/src/armnn/BackendHelper.cpp
index 03f32ac191..fde979ba41 100644
--- a/src/armnn/BackendHelper.cpp
+++ b/src/armnn/BackendHelper.cpp
@@ -1381,6 +1381,32 @@ bool LayerSupportHandle::IsTransposeSupported(const TensorInfo& input,
                                             reasonIfUnsupported);
 }
 
+// Forwarding function to maintain ABI stability
+bool LayerSupportHandle::IsUnidirectionalSequenceLstmSupported(const TensorInfo& input,
+                                                               const TensorInfo& outputStateIn,
+                                                               const TensorInfo& cellStateIn,
+                                                               const TensorInfo& output,
+                                                               const Optional<TensorInfo>& hiddenStateOutput,
+                                                               const Optional<TensorInfo>& cellStateOutput,
+                                                               const LstmDescriptor& descriptor,
+                                                               const LstmInputParamsInfo& paramsInfo,
+                                                               Optional<std::string&> reasonIfUnsupported)
+{
+    TensorInfo hiddenStateOutputVal =  hiddenStateOutput.has_value() ? hiddenStateOutput.value() : TensorInfo();
+    TensorInfo cellStateOutputVal   =  cellStateOutput.has_value() ? cellStateOutput.value() : TensorInfo();
+    TensorInfos infos{input, outputStateIn, cellStateIn, hiddenStateOutputVal, cellStateOutputVal, output};
+
+    return IsUnidirectionalSequenceLstmSupported(input,
+                                                 outputStateIn,
+                                                 cellStateIn,
+                                                 hiddenStateOutputVal,
+                                                 cellStateOutputVal,
+                                                 output,
+                                                 descriptor,
+                                                 paramsInfo,
+                                                 reasonIfUnsupported);
+}
+
 bool LayerSupportHandle::IsUnidirectionalSequenceLstmSupported(const TensorInfo& input,
                                                                const TensorInfo& outputStateIn,
                                                                const TensorInfo& cellStateIn,
-- 
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