APPBROWSER-391: Fix GLES COMPUTE alignment issues

APPBROWSER-402: Performance optimization for squeezenet/xray model

Change-Id: If31b186b99a6d6087164019fe94d3ac9279e3204
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/119526
Tested-by: Jenkins <bsgcomp@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
diff --git a/arm_compute/core/GLES_COMPUTE/IGCTensor.h b/arm_compute/core/GLES_COMPUTE/IGCTensor.h
index ab4e57e..7329864 100644
--- a/arm_compute/core/GLES_COMPUTE/IGCTensor.h
+++ b/arm_compute/core/GLES_COMPUTE/IGCTensor.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017 ARM Limited.
+ * Copyright (c) 2017-2018 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -75,6 +75,18 @@
      */
     virtual GLuint gc_buffer() const = 0;
 
+    /** Flag indicating whether the tensor has been left aligned by a kernel and therefore needs shifting.
+     *
+     * @return True if the tensor is left aligned.
+     */
+    bool needs_shifting() const;
+    /** Set the flag indicating whether or not a tensor needs shifting.
+     *
+     * @param[in] needs_shifting Indicates if the tensor is left aligned or not.
+     *
+     */
+    void set_needs_shifting(bool needs_shifting);
+
 protected:
     /** Method to be implemented by the child class to map the SSBO.
      *
@@ -92,6 +104,7 @@
 
 private:
     uint8_t *_mapping;
+    bool     _needs_shifting;
 };
 
 using IGCImage = IGCTensor;