3 calls to menu_build_tree()

menu_tree_all_data in includes/menu.inc: Gets the data structure representing a named menu tree.
menu_tree_page_data in includes/menu.inc: Gets the data structure for a named menu tree, based on the current page.
toolbar_get_menu_tree in modules/toolbar/toolbar.module: Gets only the top level items below the 'admin' path.

Buggy or inaccurate documentation? Please file an issue. Need support? Need help programming? Connect with the Drupal community.