PR c++/68464
	* cp-gimplify.c (cp_fold): Don't assume X has TREE_TYPE.
	(cp_genericize): Don't do cp_fold_r here.
	(cp_fold_function): New.
	* cp-tree.h: Declare it.
	* decl.c (finish_function): Call it and the pre-genericize plugin
	before NRV processing.

From-SVN: r231381