* cp-tree.def (EMPTY_CLASS_EXPR): New tree node.

	* call.c (build_call): Use EMPTY_CLASS_EXPR instead of RTL_EXPR.
	* expr.c (cplus_expand_expr): Expand it.
	* ir.texi: Document EMPTY_CLASS_EXPR.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@30116 138bc75d-0d04-0410-961f-82ee72b054a4