* cgraph.c (cgraph_release_function_body): New function.
	(cgraph_remove_node): Use it.
	* cgraph.h (cgraph_release_function_body): Declare.
	* cgraphunit.c (cgraph_expand_function): Use it.
	* ipa.c (cgraph_remove_unreahchable_nodes): Use it.
	* tree-ssa.c (delete_tree_ssa): Allow to be called before aliasing
	is initialized and while compilation of other function is running.
	* tree-optimize.c (execute_free_cfg_annotations): Move code to clear
	statement CFG annotations from here to ...
	* tree-cfg.c (delete_tree_cfg_annotations): ... here.

From-SVN: r120437