re PR c++/25855 (template specialisation not always found (partial ordering))

re PR c++/25855 (template specialisation not always found (partial ordering))

	PR c++/25855
	* class.c (resolve_address_of_overloaded_function): Adjust use of
	return value from most_specialized_instantiation.
	* pt.c (determine_specialization): Avoid multiple calls to
	get_bindings.
	(most_specialized_instantiation): When a tie occurs, set the
	current presumed champion to the next template.  Return the
	TREE_LIST node containing the template, rather than the template
	itself.
	(most_specialized): Remove.
	* name-lookup.c (push_overloaded_decl): When duplicate_decls
	indicates a failed redeclaration, report that to callers.
	PR c++/25855
	* g++.dg/template/spec29.C: New test.

From-SVN: r110332