COMPMID-2779: Add support for generating synthetic int8 graphs.

Adds SyntheticDataTypeMutator, which is responsible for mutating graphs
to int8 and thus enable performance analysis on a wider range of models.

Change-Id: I9a00f0ae59421ab11952660f5115b5dcd9314aaf
Signed-off-by: Georgios Pinitas <georgios.pinitas@arm.com>
Reviewed-on: https://review.mlplatform.org/c/2418
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>

34 files changed, 448 insertions, 79 deletions

diff --git a/arm_compute/graph/IGraphMutator.h b/arm_compute/graph/IGraphMutator.h
index b80d37d274..94a28f63b1 100644
--- a/arm_compute/graph/IGraphMutator.h
+++ b/arm_compute/graph/IGraphMutator.h
@@ -35,6 +35,14 @@ class Graph;
 class IGraphMutator
 {
 public:
+    /** Mutation type */
+    enum class MutationType
+    {
+        IR,     /** IR specific mutation */
+        Backend /** Backend specific mutation */
+    };
+
+public:
     /** Virtual Destructor */
     virtual ~IGraphMutator() = default;
     /** Walk the graph and perform a specific mutation
@@ -42,6 +50,11 @@ public:
      * @param[in, out] g Graph to walk and mutate
      */
     virtual void mutate(Graph &g) = 0;
+    /** Returns mutation type
+     *
+     * @return Mutation type enumeration
+     */
+    virtual MutationType type() const = 0;
     /** Returns mutator name
      *
      * @return Mutator name
diff --git a/arm_compute/graph/PassManager.h b/arm_compute/graph/PassManager.h
index c2b2319bcb..c8920ba296 100644
--- a/arm_compute/graph/PassManager.h
+++ b/arm_compute/graph/PassManager.h
@@ -78,12 +78,18 @@ public:
      * @param[in, out] g Graph to run the mutations on
      */
     void run_all(Graph &g);
+    /** Runs a mutation passes of a specific type on a given graph
+     *
+     * @param[in, out] g    Graph to run the mutation on
+     * @param[in]      type Type of the mutations to execute
+     */
+    void run_type(Graph &g, IGraphMutator::MutationType type);
     /** Runs a specific mutation pass on a given graph
      *
      * @param[in, out] g     Graph to run the mutation on
      * @param[in]      index Index of the mutation to execute
      */
-    void run(Graph &g, size_t index);
+    void run_index(Graph &g, size_t index);
 
 private:
     std::vector<std::unique_ptr<IGraphMutator>> _passes; /**< Vector of graph passes */
diff --git a/arm_compute/graph/Types.h b/arm_compute/graph/Types.h
index c337126c8d..cd4da694d2 100644
--- a/arm_compute/graph/Types.h
+++ b/arm_compute/graph/Types.h
@@ -81,6 +81,7 @@ struct GraphConfig
     bool        use_function_weights_manager{ true };  /**< Use a weights manager to manage transformed weights */
     bool        use_transition_memory_manager{ true }; /**< Use a memory manager to manager transition buffer memory */
     bool        use_tuner{ false };                    /**< Use a tuner in tunable backends */
+    bool        convert_to_uint8{ false };             /**< Convert graph to a synthetic uint8 graph */
     CLTunerMode tuner_mode{ CLTunerMode::EXHAUSTIVE }; /**< Tuner mode to be used by the CL tuner */
     int         num_threads{ -1 };                     /**< Number of threads to use (thread capable backends), if 0 the backend will auto-initialize, if -1 the backend will stay as it is. */
     std::string tuner_file{ "acl_tuner.csv" };         /**< File to load/store tuning values from */
diff --git a/arm_compute/graph/Utils.h b/arm_compute/graph/Utils.h
index 1760bc6dee..57a6f14bae 100644
--- a/arm_compute/graph/Utils.h
+++ b/arm_compute/graph/Utils.h
@@ -85,10 +85,11 @@ void force_target_to_graph(Graph &g, Target target);
 /** Creates a default @ref PassManager
  *
  * @param[in] target Target to create the pass manager for
+ * @param[in] cfg    Graph configuration meta-data
  *
  * @return A PassManager with default mutating passes
  */
-PassManager create_default_pass_manager(Target target);
+PassManager create_default_pass_manager(Target target, const GraphConfig &cfg);
 /** Setups requested backend context if it exists, is supported and hasn't been initialized already.
  *
  * @param[in,out] ctx    Graph Context.
diff --git a/arm_compute/graph/mutators/DepthConcatSubTensorMutator.h b/arm_compute/graph/mutators/DepthConcatSubTensorMutator.h
index 11fc82ffa1..14a427ba7c 100644
--- a/arm_compute/graph/mutators/DepthConcatSubTensorMutator.h
+++ b/arm_compute/graph/mutators/DepthConcatSubTensorMutator.h
@@ -39,6 +39,7 @@ class DepthConcatSubTensorMutator final : public IGraphMutator
 public:
     // Inherited methods overridden
     virtual void mutate(Graph &g) override;
+    MutationType type() const override;
     const char *name() override;
 };
 } // namespace graph
diff --git a/arm_compute/graph/mutators/GraphMutators.h b/arm_compute/graph/mutators/GraphMutators.h
index f6e390eaff..6ae06990a4 100644
--- a/arm_compute/graph/mutators/GraphMutators.h
+++ b/arm_compute/graph/mutators/GraphMutators.h
@@ -30,5 +30,6 @@
 #include "arm_compute/graph/mutators/NodeExecutionMethodMutator.h"
 #include "arm_compute/graph/mutators/NodeFusionMutator.h"
 #include "arm_compute/graph/mutators/SplitLayerSubTensorMutator.h"
+#include "arm_compute/graph/mutators/SyntheticDataTypeMutator.h"
 
 #endif /* ARM_COMPUTE_GRAPH_GRAPH_MUTATORS_H */
diff --git a/arm_compute/graph/mutators/GroupedConvolutionMutator.h b/arm_compute/graph/mutators/GroupedConvolutionMutator.h
index b6dac71182..01c9d0ee2c 100644
--- a/arm_compute/graph/mutators/GroupedConvolutionMutator.h
+++ b/arm_compute/graph/mutators/GroupedConvolutionMutator.h
@@ -39,6 +39,7 @@ class GroupedConvolutionMutator final : public IGraphMutator
 public:
     // Inherited methods overridden
     virtual void mutate(Graph &g) override;
+    MutationType type() const override;
     const char *name() override;
 };
 } // namespace graph
diff --git a/arm_compute/graph/mutators/InPlaceOperationMutator.h b/arm_compute/graph/mutators/InPlaceOperationMutator.h
index 43e88383b9..7932b6245c 100644
--- a/arm_compute/graph/mutators/InPlaceOperationMutator.h
+++ b/arm_compute/graph/mutators/InPlaceOperationMutator.h
@@ -36,6 +36,7 @@ class InPlaceOperationMutator final : public IGraphMutator
 public:
     // Inherited methods overridden
     virtual void mutate(Graph &g) override;
+    MutationType type() const override;
     const char *name() override;
 };
 } // namespace graph
diff --git a/arm_compute/graph/mutators/NodeExecutionMethodMutator.h b/arm_compute/graph/mutators/NodeExecutionMethodMutator.h
index 59df8181c5..3de940654b 100644
--- a/arm_compute/graph/mutators/NodeExecutionMethodMutator.h
+++ b/arm_compute/graph/mutators/NodeExecutionMethodMutator.h
@@ -41,6 +41,7 @@ class NodeExecutionMethodMutator final : public IGraphMutator
 public:
     // Inherited methods overridden
     virtual void mutate(Graph &g) override;
+    MutationType type() const override;
     const char *name() override;
 };
 } // namespace graph
diff --git a/arm_compute/graph/mutators/NodeFusionMutator.h b/arm_compute/graph/mutators/NodeFusionMutator.h
index a4dd5c925d..b99ee79f94 100644
--- a/arm_compute/graph/mutators/NodeFusionMutator.h
+++ b/arm_compute/graph/mutators/NodeFusionMutator.h
@@ -37,6 +37,7 @@ class NodeFusionMutator final : public IGraphMutator
 public:
     // Inherited methods overridden
     virtual void mutate(Graph &g) override;
+    MutationType type() const override;
     const char *name() override;
 };
 } // namespace graph
diff --git a/arm_compute/graph/mutators/SplitLayerSubTensorMutator.h b/arm_compute/graph/mutators/SplitLayerSubTensorMutator.h
index 29d061febb..c9747fd889 100644
--- a/arm_compute/graph/mutators/SplitLayerSubTensorMutator.h
+++ b/arm_compute/graph/mutators/SplitLayerSubTensorMutator.h
@@ -39,6 +39,7 @@ class SplitLayerSubTensorMutator final : public IGraphMutator
 public:
     // Inherited methods overridden
     virtual void mutate(Graph &g) override;
+    MutationType type() const override;
     const char *name() override;
 };
 } // namespace graph
diff --git a/arm_compute/graph/mutators/SyntheticDataTypeMutator.h b/arm_compute/graph/mutators/SyntheticDataTypeMutator.h
new file mode 100644
index 0000000000..74f4b56acd
--- /dev/null
+++ b/arm_compute/graph/mutators/SyntheticDataTypeMutator.h
@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2019 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef ARM_COMPUTE_GRAPH_SYNTHETIC_DATA_TYPE_MUTATOR_H
+#define ARM_COMPUTE_GRAPH_SYNTHETIC_DATA_TYPE_MUTATOR_H
+
+#include "arm_compute/graph/Graph.h"
+#include "arm_compute/graph/IGraphMutator.h"
+
+namespace arm_compute
+{
+namespace graph
+{
+/** Mutation pass to create synthetic graphs of a given data type */
+class SyntheticDataTypeMutator final : public IGraphMutator
+{
+public:
+    // Inherited methods overridden
+    virtual void mutate(Graph &g) override;
+    MutationType type() const override;
+    const char *name() override;
+};
+} // namespace graph
+} // namespace arm_compute
+#endif /* ARM_COMPUTE_GRAPH_SYNTHETIC_DATA_TYPE_MUTATOR_H */
diff --git a/arm_compute/graph/nodes/SoftmaxLayerNode.h b/arm_compute/graph/nodes/SoftmaxLayerNode.h
index c6990b161d..cbcd06a477 100644
--- a/arm_compute/graph/nodes/SoftmaxLayerNode.h
+++ b/arm_compute/graph/nodes/SoftmaxLayerNode.h
@@ -51,6 +51,9 @@ public:
     TensorDescriptor configure_output(size_t idx) const override;
     void accept(INodeVisitor &v) override;
 
+public:
+    static constexpr NodeType node_type = NodeType::SoftmaxLayer;
+
 private:
     float _beta;
 };
diff --git a/examples/graph_inception_v3.cpp b/examples/graph_inception_v3.cpp
index 1de6a5fad7..d49561ae38 100644
--- a/examples/graph_inception_v3.cpp
+++ b/examples/graph_inception_v3.cpp
@@ -55,9 +55,6 @@ public:
             return false;
         }
 
-        // Checks
-        ARM_COMPUTE_EXIT_ON_MSG(arm_compute::is_data_type_quantized_asymmetric(common_params.data_type), "QASYMM8 not supported for this graph");
-
         // Print parameter values
         std::cout << common_params << std::endl;
 
@@ -199,10 +196,11 @@ public:
 
         // Finalize graph
         GraphConfig config;
-        config.num_threads = common_params.threads;
-        config.use_tuner   = common_params.enable_tuner;
-        config.tuner_mode  = common_params.tuner_mode;
-        config.tuner_file  = common_params.tuner_file;
+        config.num_threads      = common_params.threads;
+        config.use_tuner        = common_params.enable_tuner;
+        config.tuner_mode       = common_params.tuner_mode;
+        config.tuner_file       = common_params.tuner_file;
+        config.convert_to_uint8 = (common_params.data_type == DataType::QASYMM8);
 
         graph.finalize(common_params.target, config);
 
diff --git a/examples/graph_inception_v4.cpp b/examples/graph_inception_v4.cpp
index bac85eef15..a322b2268d 100644
--- a/examples/graph_inception_v4.cpp
+++ b/examples/graph_inception_v4.cpp
@@ -55,9 +55,6 @@ public:
             return false;
         }
 
-        // Checks
-        ARM_COMPUTE_EXIT_ON_MSG(arm_compute::is_data_type_quantized_asymmetric(common_params.data_type), "QASYMM8 not supported for this graph");
-
         // Print parameter values
         std::cout << common_params << std::endl;
 
@@ -150,10 +147,11 @@ public:
 
         // Finalize graph
         GraphConfig config;
-        config.num_threads = common_params.threads;
-        config.use_tuner   = common_params.enable_tuner;
-        config.tuner_mode  = common_params.tuner_mode;
-        config.tuner_file  = common_params.tuner_file;
+        config.num_threads      = common_params.threads;
+        config.use_tuner        = common_params.enable_tuner;
+        config.tuner_mode       = common_params.tuner_mode;
+        config.tuner_file       = common_params.tuner_file;
+        config.convert_to_uint8 = (common_params.data_type == DataType::QASYMM8);
 
         // Load the precompiled kernels from a file into the kernel library, in this way the next time they are needed
         // compilation won't be required.
diff --git a/examples/graph_resnet50.cpp b/examples/graph_resnet50.cpp
index 17506dcf71..84355131d0 100644
--- a/examples/graph_resnet50.cpp
+++ b/examples/graph_resnet50.cpp
@@ -55,9 +55,6 @@ public:
             return false;
         }
 
-        // Checks
-        ARM_COMPUTE_EXIT_ON_MSG(arm_compute::is_data_type_quantized_asymmetric(common_params.data_type), "QASYMM8 not supported for this graph");
-
         // Print parameter values
         std::cout << common_params << std::endl;
 
@@ -113,10 +110,11 @@ public:
 
         // Finalize graph
         GraphConfig config;
-        config.num_threads = common_params.threads;
-        config.use_tuner   = common_params.enable_tuner;
-        config.tuner_mode  = common_params.tuner_mode;
-        config.tuner_file  = common_params.tuner_file;
+        config.num_threads      = common_params.threads;
+        config.use_tuner        = common_params.enable_tuner;
+        config.tuner_mode       = common_params.tuner_mode;
+        config.tuner_file       = common_params.tuner_file;
+        config.convert_to_uint8 = (common_params.data_type == DataType::QASYMM8);
 
         graph.finalize(common_params.target, config);
 
diff --git a/examples/graph_resnet_v2_50.cpp b/examples/graph_resnet_v2_50.cpp
index 785ae9c27a..e2325151bc 100644
--- a/examples/graph_resnet_v2_50.cpp
+++ b/examples/graph_resnet_v2_50.cpp
@@ -55,9 +55,6 @@ public:
             return false;
         }
 
-        // Checks
-        ARM_COMPUTE_EXIT_ON_MSG(arm_compute::is_data_type_quantized_asymmetric(common_params.data_type), "QASYMM8 not supported for this graph");
-
         // Print parameter values
         std::cout << common_params << std::endl;
 
@@ -116,10 +113,11 @@ public:
 
         // Finalize graph
         GraphConfig config;
-        config.num_threads = common_params.threads;
-        config.use_tuner   = common_params.enable_tuner;
-        config.tuner_mode  = common_params.tuner_mode;
-        config.tuner_file  = common_params.tuner_file;
+        config.num_threads      = common_params.threads;
+        config.use_tuner        = common_params.enable_tuner;
+        config.tuner_mode       = common_params.tuner_mode;
+        config.tuner_file       = common_params.tuner_file;
+        config.convert_to_uint8 = (common_params.data_type == DataType::QASYMM8);
 
         graph.finalize(common_params.target, config);
 
diff --git a/examples/graph_squeezenet.cpp b/examples/graph_squeezenet.cpp
index 9721775495..234def150d 100644
--- a/examples/graph_squeezenet.cpp
+++ b/examples/graph_squeezenet.cpp
@@ -55,9 +55,6 @@ public:
             return false;
         }
 
-        // Checks
-        ARM_COMPUTE_EXIT_ON_MSG(arm_compute::is_data_type_quantized_asymmetric(common_params.data_type), "QASYMM8 not supported for this graph");
-
         // Print parameter values
         std::cout << common_params << std::endl;
 
@@ -166,10 +163,11 @@ public:
 
         // Finalize graph
         GraphConfig config;
-        config.num_threads = common_params.threads;
-        config.use_tuner   = common_params.enable_tuner;
-        config.tuner_mode  = common_params.tuner_mode;
-        config.tuner_file  = common_params.tuner_file;
+        config.num_threads      = common_params.threads;
+        config.use_tuner        = common_params.enable_tuner;
+        config.tuner_mode       = common_params.tuner_mode;
+        config.tuner_file       = common_params.tuner_file;
+        config.convert_to_uint8 = (common_params.data_type == DataType::QASYMM8);
 
         graph.finalize(common_params.target, config);
 
diff --git a/examples/graph_squeezenet_v1_1.cpp b/examples/graph_squeezenet_v1_1.cpp
index 0fd52b9e19..b43c8ffdad 100644
--- a/examples/graph_squeezenet_v1_1.cpp
+++ b/examples/graph_squeezenet_v1_1.cpp
@@ -55,9 +55,6 @@ public:
             return false;
         }
 
-        // Checks
-        ARM_COMPUTE_EXIT_ON_MSG(arm_compute::is_data_type_quantized_asymmetric(common_params.data_type), "QASYMM8 not supported for this graph");
-
         // Print parameter values
         std::cout << common_params << std::endl;
 
@@ -166,10 +163,11 @@ public:
 
         // Finalize graph
         GraphConfig config;
-        config.num_threads = common_params.threads;
-        config.use_tuner   = common_params.enable_tuner;
-        config.tuner_mode  = common_params.tuner_mode;
-        config.tuner_file  = common_params.tuner_file;
+        config.num_threads      = common_params.threads;
+        config.use_tuner        = common_params.enable_tuner;
+        config.tuner_mode       = common_params.tuner_mode;
+        config.tuner_file       = common_params.tuner_file;
+        config.convert_to_uint8 = (common_params.data_type == DataType::QASYMM8);
 
         graph.finalize(common_params.target, config);
 
diff --git a/examples/graph_srcnn955.cpp b/examples/graph_srcnn955.cpp
index b69305889b..29faf72ac2 100644
--- a/examples/graph_srcnn955.cpp
+++ b/examples/graph_srcnn955.cpp
@@ -75,9 +75,6 @@ public:
         std::cout << "Image width: " << image_width << std::endl;
         std::cout << "Image height: " << image_height << std::endl;
 
-        // Checks
-        ARM_COMPUTE_EXIT_ON_MSG(arm_compute::is_data_type_quantized_asymmetric(common_params.data_type), "QASYMM8 not supported for this graph");
-
         // Get trainable parameters data path
         const std::string data_path  = common_params.data_path;
         const std::string model_path = "/cnn_data/srcnn955_model/";
@@ -120,10 +117,11 @@ public:
 
         // Finalize graph
         GraphConfig config;
-        config.num_threads = common_params.threads;
-        config.use_tuner   = common_params.enable_tuner;
-        config.tuner_mode  = common_params.tuner_mode;
-        config.tuner_file  = common_params.tuner_file;
+        config.num_threads      = common_params.threads;
+        config.use_tuner        = common_params.enable_tuner;
+        config.tuner_mode       = common_params.tuner_mode;
+        config.tuner_file       = common_params.tuner_file;
+        config.convert_to_uint8 = (common_params.data_type == DataType::QASYMM8);
 
         graph.finalize(common_params.target, config);
 
diff --git a/examples/graph_vgg16.cpp b/examples/graph_vgg16.cpp
index d58bf6cbf5..2c7f614f64 100644
--- a/examples/graph_vgg16.cpp
+++ b/examples/graph_vgg16.cpp
@@ -65,9 +65,6 @@ public:
             return false;
         }
 
-        // Checks
-        ARM_COMPUTE_EXIT_ON_MSG(arm_compute::is_data_type_quantized_asymmetric(common_params.data_type), "QASYMM8 not supported for this graph");
-
         // Print parameter values
         std::cout << common_params << std::endl;
 
@@ -224,10 +221,11 @@ public:
 
         // Finalize graph
         GraphConfig config;
-        config.num_threads = common_params.threads;
-        config.use_tuner   = common_params.enable_tuner;
-        config.tuner_mode  = common_params.tuner_mode;
-        config.tuner_file  = common_params.tuner_file;
+        config.num_threads      = common_params.threads;
+        config.use_tuner        = common_params.enable_tuner;
+        config.tuner_mode       = common_params.tuner_mode;
+        config.tuner_file       = common_params.tuner_file;
+        config.convert_to_uint8 = (common_params.data_type == DataType::QASYMM8);
 
         graph.finalize(common_params.target, config);
 
diff --git a/examples/graph_vgg19.cpp b/examples/graph_vgg19.cpp
index 82895bb516..e3733d859c 100644
--- a/examples/graph_vgg19.cpp
+++ b/examples/graph_vgg19.cpp
@@ -64,9 +64,6 @@ public:
             return false;
         }
 
-        // Checks
-        ARM_COMPUTE_EXIT_ON_MSG(arm_compute::is_data_type_quantized_asymmetric(common_params.data_type), "QASYMM8 not supported for this graph");
-
         // Print parameter values
         std::cout << common_params << std::endl;
 
@@ -235,10 +232,11 @@ public:
 
         // Finalize graph
         GraphConfig config;
-        config.num_threads = common_params.threads;
-        config.use_tuner   = common_params.enable_tuner;
-        config.tuner_mode  = common_params.tuner_mode;
-        config.tuner_file  = common_params.tuner_file;
+        config.num_threads      = common_params.threads;
+        config.use_tuner        = common_params.enable_tuner;
+        config.tuner_mode       = common_params.tuner_mode;
+        config.tuner_file       = common_params.tuner_file;
+        config.convert_to_uint8 = (common_params.data_type == DataType::QASYMM8);
 
         graph.finalize(common_params.target, config);
 
diff --git a/examples/graph_vgg_vdsr.cpp b/examples/graph_vgg_vdsr.cpp
index f82ae4c20e..870d3cb391 100644
--- a/examples/graph_vgg_vdsr.cpp
+++ b/examples/graph_vgg_vdsr.cpp
@@ -138,10 +138,11 @@ public:
 
         // Finalize graph
         GraphConfig config;
-        config.num_threads = common_params.threads;
-        config.use_tuner   = common_params.enable_tuner;
-        config.tuner_mode  = common_params.tuner_mode;
-        config.tuner_file  = common_params.tuner_file;
+        config.num_threads      = common_params.threads;
+        config.use_tuner        = common_params.enable_tuner;
+        config.tuner_mode       = common_params.tuner_mode;
+        config.tuner_file       = common_params.tuner_file;
+        config.convert_to_uint8 = (common_params.data_type == DataType::QASYMM8);
 
         graph.finalize(common_params.target, config);
 
diff --git a/src/graph/GraphManager.cpp b/src/graph/GraphManager.cpp
index 4f942b99e4..996e50bbbc 100644
--- a/src/graph/GraphManager.cpp
+++ b/src/graph/GraphManager.cpp
@@ -51,6 +51,9 @@ void GraphManager::finalize_graph(Graph &graph, GraphContext &ctx, PassManager &
         ARM_COMPUTE_ERROR("Graph is already registered!");
     }
 
+    // Apply IR mutating passes
+    pm.run_type(graph, IGraphMutator::MutationType::IR);
+
     // Force target to all graph construct
     // TODO (COMPMID-2014) : Support heterogeneous execution
     Target forced_target = target;
@@ -68,8 +71,8 @@ void GraphManager::finalize_graph(Graph &graph, GraphContext &ctx, PassManager &
     // Configure all tensors
     detail::configure_all_tensors(graph);
 
-    // Apply all mutating passes
-    pm.run_all(graph);
+    // Apply backend mutating passes
+    pm.run_type(graph, IGraphMutator::MutationType::Backend);
 
     // Perform topological sort
     std::vector<NodeID> topological_sorted_nodes = dfs(graph);
diff --git a/src/graph/PassManager.cpp b/src/graph/PassManager.cpp
index 92860e2987..99d979842a 100644
--- a/src/graph/PassManager.cpp
+++ b/src/graph/PassManager.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018 ARM Limited.
+ * Copyright (c) 2018-2019 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -70,7 +70,19 @@ void PassManager::run_all(Graph &g)
     }
 }
 
-void PassManager::run(Graph &g, size_t index)
+void PassManager::run_type(Graph &g, IGraphMutator::MutationType type)
+{
+    for(auto &pass : _passes)
+    {
+        if(pass && (pass->type() == type))
+        {
+            ARM_COMPUTE_LOG_GRAPH_INFO("Running mutating pass : " << pass->name() << std::endl);
+            pass->mutate(g);
+        }
+    }
+}
+
+void PassManager::run_index(Graph &g, size_t index)
 {
     if(index >= _passes.size())
     {
@@ -78,9 +90,9 @@ void PassManager::run(Graph &g, size_t index)
     }
 
     auto &pass = _passes.at(index);
-
     if(pass != nullptr)
     {
+        ARM_COMPUTE_LOG_GRAPH_INFO("Running mutating pass : " << pass->name() << std::endl);
         pass->mutate(g);
     }
 }
diff --git a/src/graph/Utils.cpp b/src/graph/Utils.cpp
index 4c34dd85a5..3bf0caca7e 100644
--- a/src/graph/Utils.cpp
+++ b/src/graph/Utils.cpp
@@ -74,13 +74,17 @@ void force_target_to_graph(Graph &g, Target target)
     }
 }
 
-PassManager create_default_pass_manager(Target target)
+PassManager create_default_pass_manager(Target target, const GraphConfig &cfg)
 {
     PassManager pm;
 
     const bool is_target_gc = target == Target::GC;
 
     // Passes that mutate graph IR
+    if(cfg.convert_to_uint8)
+    {
+        pm.append(support::cpp14::make_unique<SyntheticDataTypeMutator>(), !is_target_gc);
+    }
     pm.append(support::cpp14::make_unique<NodeFusionMutator>(), !is_target_gc);
     pm.append(support::cpp14::make_unique<GroupedConvolutionMutator>());
     pm.append(support::cpp14::make_unique<InPlaceOperationMutator>(), !is_target_gc);
diff --git a/src/graph/frontend/Stream.cpp b/src/graph/frontend/Stream.cpp
index 878d688995..c04a426eef 100644
--- a/src/graph/frontend/Stream.cpp
+++ b/src/graph/frontend/Stream.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018 ARM Limited.
+ * Copyright (c) 2018-2019 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -39,7 +39,7 @@ Stream::Stream(size_t id, std::string name)
 
 void Stream::finalize(Target target, const GraphConfig &config)
 {
-    PassManager pm = create_default_pass_manager(target);
+    PassManager pm = create_default_pass_manager(target, config);
     _ctx.set_config(config);
     _manager.finalize_graph(_g, _ctx, pm, target);
 }
diff --git a/src/graph/mutators/DepthConcatSubTensorMutator.cpp b/src/graph/mutators/DepthConcatSubTensorMutator.cpp
index 7994541b78..30d6700446 100644
--- a/src/graph/mutators/DepthConcatSubTensorMutator.cpp
+++ b/src/graph/mutators/DepthConcatSubTensorMutator.cpp
@@ -42,6 +42,11 @@ const char *DepthConcatSubTensorMutator::name()
     return "DepthConcatSubTensorMutator";
 }
 
+IGraphMutator::MutationType DepthConcatSubTensorMutator::type() const
+{
+    return IGraphMutator::MutationType::Backend;
+}
+
 void DepthConcatSubTensorMutator::mutate(Graph &g)
 {
     // Early exit if no Concatenation layers exist in graph
diff --git a/src/graph/mutators/GroupedConvolutionMutator.cpp b/src/graph/mutators/GroupedConvolutionMutator.cpp
index 3d53f49218..bb452f9b94 100644
--- a/src/graph/mutators/GroupedConvolutionMutator.cpp
+++ b/src/graph/mutators/GroupedConvolutionMutator.cpp
@@ -103,6 +103,11 @@ const char *GroupedConvolutionMutator::name()
     return "GroupedConvolutionMutator";
 }
 
+IGraphMutator::MutationType GroupedConvolutionMutator::type() const
+{
+    return IGraphMutator::MutationType::Backend;
+}
+
 void GroupedConvolutionMutator::mutate(Graph &g)
 {
     // Early exit if no Convolution layers exist in graph
diff --git a/src/graph/mutators/InPlaceOperationMutator.cpp b/src/graph/mutators/InPlaceOperationMutator.cpp
index 07e3ecf2c7..ef4ca47e48 100644
--- a/src/graph/mutators/InPlaceOperationMutator.cpp
+++ b/src/graph/mutators/InPlaceOperationMutator.cpp
@@ -35,6 +35,11 @@ const char *InPlaceOperationMutator::name()
     return "InPlaceOperationMutator";
 }
 
+IGraphMutator::MutationType InPlaceOperationMutator::type() const
+{
+    return IGraphMutator::MutationType::Backend;
+}
+
 void InPlaceOperationMutator::mutate(Graph &g)
 {
     std::set<NodeType> in_place_nodes = { NodeType::BatchNormalizationLayer, NodeType::ActivationLayer };
diff --git a/src/graph/mutators/NodeExecutionMethodMutator.cpp b/src/graph/mutators/NodeExecutionMethodMutator.cpp
index b420121c42..72e2645dd2 100644
--- a/src/graph/mutators/NodeExecutionMethodMutator.cpp
+++ b/src/graph/mutators/NodeExecutionMethodMutator.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018 ARM Limited.
+ * Copyright (c) 2018-2019 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -73,6 +73,11 @@ const char *NodeExecutionMethodMutator::name()
     return "NodeExecutionMethodMutator";
 }
 
+IGraphMutator::MutationType NodeExecutionMethodMutator::type() const
+{
+    return IGraphMutator::MutationType::Backend;
+}
+
 void NodeExecutionMethodMutator::mutate(Graph &g)
 {
     // Convolution Layer
diff --git a/src/graph/mutators/NodeFusionMutator.cpp b/src/graph/mutators/NodeFusionMutator.cpp
index abd6436d74..b7f081dc42 100644
--- a/src/graph/mutators/NodeFusionMutator.cpp
+++ b/src/graph/mutators/NodeFusionMutator.cpp
@@ -286,6 +286,11 @@ const char *NodeFusionMutator::name()
     return "NodeFusionMutator";
 }
 
+IGraphMutator::MutationType NodeFusionMutator::type() const
+{
+    return IGraphMutator::MutationType::Backend;
+}
+
 void NodeFusionMutator::mutate(Graph &g)
 {
     // Supported activations when fusing
diff --git a/src/graph/mutators/SplitLayerSubTensorMutator.cpp b/src/graph/mutators/SplitLayerSubTensorMutator.cpp
index e21252a9ed..3ba73071ed 100644
--- a/src/graph/mutators/SplitLayerSubTensorMutator.cpp
+++ b/src/graph/mutators/SplitLayerSubTensorMutator.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018 ARM Limited.
+ * Copyright (c) 2018-2019 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -42,6 +42,11 @@ const char *SplitLayerSubTensorMutator::name()
     return "SplitLayerSubTensorMutator";
 }
 
+IGraphMutator::MutationType SplitLayerSubTensorMutator::type() const
+{
+    return IGraphMutator::MutationType::Backend;
+}
+
 void SplitLayerSubTensorMutator::mutate(Graph &g)
 {
     // Early exit if no Split layers exist in graph
diff --git a/src/graph/mutators/SyntheticDataTypeMutator.cpp b/src/graph/mutators/SyntheticDataTypeMutator.cpp
new file mode 100644
index 0000000000..b318df956e
--- /dev/null
+++ b/src/graph/mutators/SyntheticDataTypeMutator.cpp
@@ -0,0 +1,261 @@
+/*
+ * Copyright (c) 2019 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include "arm_compute/graph/mutators/SyntheticDataTypeMutator.h"
+
+#include "arm_compute/graph/GraphBuilder.h"
+#include "arm_compute/graph/ITensorAccessor.h"
+#include "arm_compute/graph/Logger.h"
+#include "arm_compute/graph/Utils.h"
+#include "arm_compute/graph/nodes/Nodes.h"
+
+#include "arm_compute/core/utils/misc/Cast.h"
+
+#include <set>
+
+namespace arm_compute
+{
+namespace graph
+{
+namespace
+{
+/** Empty accessor class */
+class EmptyAccessor final : public graph::ITensorAccessor
+{
+public:
+    /** Default Constructor */
+    EmptyAccessor() = default;
+
+    // Inherited methods overriden:
+    bool access_tensor(ITensor &tensor) override
+    {
+        ARM_COMPUTE_UNUSED(tensor);
+        return true;
+    }
+};
+
+/** Check if the mutation pass can be applied
+ *
+ * @param[in] g Graph the mutation pass need to be applied on
+ *
+ * @return True if the pass can be applied else false
+ */
+bool is_mutation_supported(Graph &g)
+{
+    const std::set<NodeType> unsupported_node_types = { NodeType::DetectionOutputLayer,
+                                                        NodeType::NormalizationLayer,
+                                                        NodeType::PriorBoxLayer
+                                                      };
+
+    for(const auto &utype : unsupported_node_types)
+    {
+        if(!g.nodes(utype).empty())
+        {
+            return false;
+        }
+    }
+    return true;
+}
+
+/** Remove nodes that get optimized out during conversion
+ *
+ * @param[in, out] g Graph to remove the nodes from.
+ */
+void remove_optimized_nodes(Graph &g)
+{
+    const std::set<NodeType> optimized_node_types = { NodeType::BatchNormalizationLayer };
+
+    for(const auto &opt_type : optimized_node_types)
+    {
+        const std::vector<NodeID> opt_nodes_ids = g.nodes(opt_type);
+        for(const auto &node_id : opt_nodes_ids)
+        {
+            INode *node = g.node(node_id);
+
+            // Get input edge
+            Edge *input_edge = node->input_edge(0);
+            ARM_COMPUTE_ERROR_ON(input_edge == nullptr);
+
+            // Get producer node
+            INode       *producer         = input_edge->producer();
+            const EdgeID producer_edge_id = input_edge->producer_idx();
+            ARM_COMPUTE_ERROR_ON(producer == nullptr);
+
+            // Get driving nodes
+            std::vector<NodeIdxPair> driving_nodes = get_driving_nodes(*node);
+
+            // Remove node
+            g.remove_node(node->id());
+
+            // Update connections
+            for(auto &driving_node : driving_nodes)
+            {
+                g.add_connection(producer->id(), producer_edge_id, driving_node.node_id, driving_node.index);
+            }
+        }
+    }
+}
+
+/** Convert tensor meta-data
+ *
+ * @param[in,out] g Graph to convert tensors of.
+ */
+void convert_tensors(Graph &g)
+{
+    auto &tensors = g.tensors();
+    for(auto &tensor : tensors)
+    {
+        if(tensor != nullptr)
+        {
+            tensor->desc().data_type  = DataType::QASYMM8;
+            tensor->desc().quant_info = QuantizationInfo(0.125f, -10);
+        }
+    }
+}
+
+/** Convert special node
+ *
+ * @param[in,out] g                  Graph to convert tensors of.
+ * @param[in]     fnc                Conversion function.
+ * @param[in]     optional_arguments Conversion function arguments.
+ */
+template <typename NT>
+void convert_special_node(Graph &g, std::function<bool(INode *, Tensor *)> const &f)
+{
+    const std::vector<NodeID> nodes_ids = g.nodes(NT::node_type);
+    for(const auto &nodes_id : nodes_ids)
+    {
+        INode *node = arm_compute::utils::cast::polymorphic_downcast<NT *>(g.node(nodes_id));
+        ARM_COMPUTE_ERROR_ON(node == nullptr);
+
+        Tensor *output_tensor = node->output(0);
+        ARM_COMPUTE_ERROR_ON(output_tensor == nullptr);
+
+        f(node, output_tensor);
+    }
+}
+
+/** Converts special tensors
+ *
+ * @param[in,out] g Graph to convert tensors of.
+ */
+void convert_special_tensors(Graph &g)
+{
+    auto softmax_func = [](INode * node, Tensor * tensor)
+    {
+        ARM_COMPUTE_UNUSED(node);
+        tensor->desc().quant_info = QuantizationInfo(1.f / 256.f, 0);
+        return true;
+    };
+
+    auto act_func = [](INode * node, Tensor * tensor)
+    {
+        auto *act_node = arm_compute::utils::cast::polymorphic_downcast<ActivationLayerNode *>(node);
+        if(act_node->activation_info().activation() == ActivationLayerInfo::ActivationFunction::TANH)
+        {
+            tensor->desc().quant_info = QuantizationInfo(1.f / 128.f, 128);
+        }
+        return true;
+    };
+
+    convert_special_node<ActivationLayerNode>(g, act_func);
+    convert_special_node<SoftmaxLayerNode>(g, softmax_func);
+}
+
+/** Handle nodes with bias
+ *
+ * @note Special tensors are for now biases that the data type differ
+ *
+ * @param[in,out] g Graph to convert tensors of.
+ */
+void handle_nodes_with_bias(Graph &g)
+{
+    const std::set<NodeType> special_node_types = { NodeType::ConvolutionLayer,
+                                                    NodeType::DeconvolutionLayer,
+                                                    NodeType::DepthwiseConvolutionLayer,
+                                                    NodeType::FullyConnectedLayer
+                                                  };
+
+    for(const auto &spc_type : special_node_types)
+    {
+        const std::vector<NodeID> scp_nodes_ids = g.nodes(spc_type);
+        for(const auto &node_id : scp_nodes_ids)
+        {
+            INode *node = g.node(node_id);
+            if(node != nullptr)
+            {
+                Tensor *tensor = node->input(2);
+                if(tensor != nullptr)
+                {
+                    tensor->desc().data_type = DataType::S32;
+                }
+                else
+                {
+                    auto params = node->common_node_params();
+                    params.name = params.name.empty() ? "" : params.name + "Bias";
+
+                    TensorDescriptor b_desc = node->input(1)->desc();
+                    auto             depth  = b_desc.shape[get_dimension_idx(b_desc.layout, DataLayoutDimension::BATCHES)];
+                    b_desc.shape            = TensorShape(depth);
+
+                    auto accessor = support::cpp14::make_unique<EmptyAccessor>();
+                    auto b_nid    = GraphBuilder::add_const_node(g, params, b_desc, std::move(accessor));
+                    g.add_connection(b_nid, 0, node_id, 2);
+                }
+            }
+        }
+    }
+}
+} // namespace
+
+const char *SyntheticDataTypeMutator::name()
+{
+    return "SyntheticDataTypeMutator";
+}
+
+IGraphMutator::MutationType SyntheticDataTypeMutator::type() const
+{
+    return IGraphMutator::MutationType::IR;
+}
+
+void SyntheticDataTypeMutator::mutate(Graph &g)
+{
+    if(is_mutation_supported(g))
+    {
+        // Remove nodes that get optimized out (e.g. BatchNorm)
+        remove_optimized_nodes(g);
+
+        // Convert tensor
+        convert_tensors(g);
+        convert_special_tensors(g);
+
+        // Handle special nodes
+        handle_nodes_with_bias(g);
+    }
+    else
+    {
+        ARM_COMPUTE_LOG_GRAPH_VERBOSE("Synthetic data type mutator couldn't be applied" << std::endl);
+    }
+}
+} // namespace graph
+} // namespace arm_compute