PR c++/11094, DR 408

	PR c++/11094, DR 408
	* cp-tree.h (VAR_HAD_UNKNOWN_BOUND, SET_VAR_HAD_UNKNOWN_BOUND): New.
	* decl2.c (finish_static_data_member_decl): Set it.
	* decl.c (duplicate_decls): Propagate it.
	* pt.c (tsubst_decl): Don't substitute the domain of an array
	VAR_DECL if it's set.
	(regenerate_decl_from_template): Substitute it here.
	(type_dependent_expression_p): Return true if it's set.
	* semantics.c (finish_decltype_type): Instantiate such a variable.
	* typeck.c (cxx_sizeof_expr): Likewise.
	(strip_array_domain): New.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@158075 138bc75d-0d04-0410-961f-82ee72b054a4