OpenVINO Model Pass

.. meta:: :description: Learn how to use Model Pass transformation class to take entire ov::Model as input and process it.

ov::pass::ModelPass is used for transformations that take entire ov::Model as an input and process it.

Template for ModelPass transformation class

.. doxygensnippet:: docs/articles_en/assets/snippets/template_model_transformation.hpp :language: cpp :fragment: [model_pass:template_transformation_hpp]

.. tab-set::

.. tab-item:: C++ :sync: cpp

  .. doxygensnippet:: docs/articles_en/assets/snippets/template_model_transformation.cpp
     :language: cpp
     :fragment: [model_pass:template_transformation_cpp]

.. tab-item:: Python :sync: py

  .. doxygensnippet:: docs/articles_en/assets/snippets/ov_model_pass.py
     :language: py
     :fragment: [model_pass:ov_model_pass_py]

Using ov::pass::ModelPass, you need to override the run_on_model method where you will write the transformation code. Return value is true if the original model has changed during transformation (new operation was added, or operations replacement was made, or node attributes were changed); otherwise, it is false. Also ov::pass::ModelPass based transformations can be executed via ov::pass::Manager.