COMPMID-1603: Add PadLayer to graph API

Change-Id: Ic985ac8b0b09c3a6b3f2d43274af8ce89f8c90dd
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/150313
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
Tested-by: bsgcomp <bsgcomp@arm.com>
diff --git a/arm_compute/graph/GraphBuilder.h b/arm_compute/graph/GraphBuilder.h
index 1302d2a..2170cd1 100644
--- a/arm_compute/graph/GraphBuilder.h
+++ b/arm_compute/graph/GraphBuilder.h
@@ -251,6 +251,17 @@
      */
     static NodeID add_normalize_planar_yuv_node(Graph &g, NodeParams params, NodeIdxPair input,
                                                 ITensorAccessorUPtr mean_accessor = nullptr, ITensorAccessorUPtr std_accessor = nullptr);
+    /** Adds a pad layer node to the graph
+     *
+     * @param[in] g       Graph to add the node to
+     * @param[in] params  Common node parameters
+     * @param[in] input   Input to the reshape layer node as a NodeID-Index pair
+     * @param[in] padding The padding for each spatial dimension of the input tensor. The pair padding[i]
+     *                    specifies the front and the end padding in the i-th dimension.
+     *
+     * @return Node ID of the created node, EmptyNodeID in case of error
+     */
+    static NodeID add_pad_node(Graph &g, NodeParams params, NodeIdxPair input, PaddingList padding);
     /** Adds a permute layer node to the graph
      *
      * @param[in] g      Graph to add the node to