[Review Shape] CLDepthwiseConvolutionLayer mismatches

- Fixed a bug that corrected the number of dimensions of a TensorShape for added trailing 1s
- Avoided adding offset_first_element for the Depthwise 3x3 NCHW OpenCL kernels, since it wouldn't align with the window which is based on the output
- Adjusted padding requirements along the x for Depthwise 3x3 NCHW. The kernel should always add 2 * dilation_(x/y) to the num_elems_read_x/y
- Adjusted the kernel's border_size given to the border handler at function level
- Added the dataset that previously made the tests fail

Resolves: COMPMID-4041

Change-Id: Ifab7d38b263f12173fcc96a5f0bd3375756c3c53
Signed-off-by: Giorgio Arena <giorgio.arena@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/4673
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: SiCong Li <sicong.li@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
diff --git a/tests/datasets/DilatedDepthwiseConvolutionLayerDataset.h b/tests/datasets/DilatedDepthwiseConvolutionLayerDataset.h
index 38762f3..9e2a3cf 100644
--- a/tests/datasets/DilatedDepthwiseConvolutionLayerDataset.h
+++ b/tests/datasets/DilatedDepthwiseConvolutionLayerDataset.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019 Arm Limited.
+ * Copyright (c) 2019-2020 Arm Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -68,9 +68,9 @@
 public:
     SmallDepthwiseDilatedConvolutionLayerDataset3x3()
     {
-        add_config(TensorShape(7U, 7U, 1U), Size2D(3U, 3U), PadStrideInfo(1, 1, 1, 0), Size2D(2U, 2U));
+        add_config(TensorShape(1U, 1U, 1U), Size2D(3U, 3U), PadStrideInfo(1, 1, 2, 2), Size2D(2U, 2U));
         add_config(TensorShape(7U, 7U, 1U), Size2D(3U, 3U), PadStrideInfo(1, 1, 2, 0), Size2D(2U, 2U));
-        add_config(TensorShape(7U, 7U, 1U), Size2D(3U, 3U), PadStrideInfo(1, 1, 3, 0), Size2D(2U, 2U));
+        add_config(TensorShape(16U, 7U, 1U), Size2D(3U, 3U), PadStrideInfo(1, 1, 0, 1), Size2D(2U, 2U));
 
         // Different strides and dilations
         add_config(TensorShape(7U, 7U, 1U), Size2D(3U, 3U), PadStrideInfo(1, 1, 0, 0), Size2D(2U, 2U));
@@ -119,7 +119,7 @@
 public:
     LargeDepthwiseDilatedConvolutionLayerDataset3x3()
     {
-        add_config(TensorShape(33U, 27U, 11U, 3U), Size2D(3U, 3U), PadStrideInfo(1, 1, 0, 1), Size2D(2U, 1U));
+        add_config(TensorShape(32U, 27U, 11U, 3U), Size2D(3U, 3U), PadStrideInfo(1, 1, 0, 1), Size2D(2U, 1U));
         add_config(TensorShape(33U, 27U, 11U, 3U), Size2D(3U, 3U), PadStrideInfo(1, 1, 1, 1), Size2D(2U, 2U));
         add_config(TensorShape(21U, 31U, 9U, 4U), Size2D(3U, 3U), PadStrideInfo(1, 2, 1, 0), Size2D(2U, 2U));
         add_config(TensorShape(33U, 27U, 11U, 3U), Size2D(3U, 3U), PadStrideInfo(1, 2, 0, 1), Size2D(2U, 1U));
@@ -140,4 +140,4 @@
 } // namespace datasets
 } // namespace test
 } // namespace arm_compute
-#endif /* ARM_COMPUTE_TEST_DILATED_CONVOLUTION_LAYER_DATASET */
+#endif /* ARM_COMPUTE_TEST_DILATED_CONVOLUTION_LAYER_DATASET */
\ No newline at end of file