gcc/ChangeLog:

	* dwarf2out.c (is_nested_in_subprogram): New function.
	(should_move_die_to_comdat): Use it.
	(copy_ancestor_tree): Don't mark DIEs here.
	(copy_decls_walk): Start walk from root of newly-added tree;
	mark DIEs here instead.

gcc/testsuite/ChangeLog:

	* g++.dg/debug/dwarf2/dwarf4-typedef.C: New test.

From-SVN: r161217