c++: template-id dependence wrt local static arg [PR117792]

c++: template-id dependence wrt local static arg [PR117792]

Here we end up ICEing at instantiation time for the call to
f<local_static> ultimately because we wrongly consider the call to be
non-dependent, and so we specialize f ahead of time and then get
confused when fully substituting this specialization.

The call is dependent due to [temp.dep.temp]/3 and we miss that because
function template-id arguments aren't coerced until overload resolution,
and so the local static template argument lacks an implicit cast to
reference type that value_dependent_expression_p looks for before
considering dependence of the address.  Other kinds of template-ids aren't
affected since they're coerced ahead of time.

So when considering dependence of a function template-id, we need to
conservatively consider dependence of the address of each argument (if
applicable).

	PR c++/117792

gcc/cp/ChangeLog:

	* pt.cc (type_dependent_expression_p): Consider the dependence
	of the address of each template argument of a function
	template-id.

gcc/testsuite/ChangeLog:

	* g++.dg/cpp1z/nontype7.C: New test.

Reviewed-by: Jason Merrill <jason@redhat.com>