Which function checks if the slug has been changed before saving?

Question

WordPress

It is necessary to check if the post slug has been changed before saving it, which function in WordPress is responsible for this? I know there is one, but I can't find it.
Actually why is this:

function delete_old_slugs() {
   срабатывает действие из плагина, удаляющего wp_old_slug из BD
}

if ( требуемая_функция == тру ) { 
add_action ( 'save_post', 'delete_old_slugs');
add_action ( 'publish_post', 'delete_old_slugs');
}

If the post slug has been changed, then when saving or publishing the post, delete the old slugs from the database that Voprdpress saves.