Port CLGEMM to memory injecting interface

Moves the following kernels:
 - CLGEMMMatrixMultiplyKernel
 - CLGEMMMatrixMultiplyNativeKernel
 - CLGEMMMatrixMultipluReshapedKernel
 - CLGEMMMatrixMultiplyReshapedOnlyRHSKernel

 Moves the following functions
 - CLGEMM

Introduces facilities to easy handling of auxiliary temporary buffers
under then new run interface. Such are:
 - CLAuxTensorHandler: That allows wrapping of workspace buffers memory
 to CLBuffer objects
 - Ability to inject TensorInfo to allocator without transferring
 ownership. This reduce the copy overhead if needed.

Resolves: COMPMID-4188

Signed-off-by: Georgios Pinitas <georgios.pinitas@arm.com>
Change-Id: I7055435d831b05b749b26302082e4ac45f26dfb0
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/5498
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michalis Spyrou <michalis.spyrou@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>

1 files changed, 10 insertions, 8 deletions

diff --git a/src/runtime/ITensorAllocator.cpp b/src/runtime/ITensorAllocator.cpp
index ae648d4dd2..fe3d2804cb 100644
--- a/src/runtime/ITensorAllocator.cpp
+++ b/src/runtime/ITensorAllocator.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2018 Arm Limited.
+ * Copyright (c) 2016-2021 Arm Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -30,25 +30,27 @@
 
 using namespace arm_compute;
 
-ITensorAllocator::ITensorAllocator()
-    : _info(), _alignment(0)
+void ITensorAllocator::init(const TensorInfo &input, size_t alignment)
 {
+    _info_owned    = input;
+    _info_external = nullptr;
+    _alignment     = alignment;
 }
 
-void ITensorAllocator::init(const TensorInfo &input, size_t alignment)
+void ITensorAllocator::soft_init(TensorInfo &input, size_t alignment)
 {
-    _info      = input;
-    _alignment = alignment;
+    _info_external = &input;
+    _alignment     = alignment;
 }
 
 TensorInfo &ITensorAllocator::info()
 {
-    return _info;
+    return (_info_external != nullptr) ? *_info_external : _info_owned;
 }
 
 const TensorInfo &ITensorAllocator::info() const
 {
-    return _info;
+    return (_info_external != nullptr) ? *_info_external : _info_owned;
 }
 
 size_t ITensorAllocator::alignment() const