PR c++/37971

	PR c++/37971
	* class.c (resolve_address_of_overloaded_function): Check
	accessibility of member functions unless FLAGS indicates
	otherwise.
	* call.c (standard_conversion): Adjust flags passed to
	instantiate_type.
	(convert_default_arg): Do not perform access checks.
	* cp-tree.h (tsubst_flags_t): Add tf_no_access_control.

	PR c++/37971
	* g++.dg/overload/defarg2.C: New test.
	* g++.dg/overload/defarg3.C: Likewise.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@142628 138bc75d-0d04-0410-961f-82ee72b054a4