* cgraph.c (cgraph_mark_address_taken_node): No longer imply needed flag.

	* cgraph.c (cgraph_mark_address_taken_node): No longer imply needed flag.
	* cgraph.h (cgraph_only_called_directly_p,
	cgraph_can_remove_if_no_direct_calls_p): test address_taken flag.
	(cgraph_can_remove_if_no_direct_calls_and_refs_p): New function.
	* cgraphunit.c (cgraph_mark_functions_to_output): Test address_taken.
	(assemble
	* ipa.c (cgraph_remove_unreachable_nodes): Use
	cgraph_can_remove_if_no_direct_calls_and_refs_p; clear address_taken flags.
	* tree-inline.c (copy_bb): Check address_taken flag.
	* tree-profile.c (tree_gen_ic_func_profiler): Check address_taken and
	externally_visible flag.

	* tree-ssa/unreachable.c: New test.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@159354 138bc75d-0d04-0410-961f-82ee72b054a4