2019-04-24  Richard Biener  <rguenther@suse.de>

	cp/
	* call.c (null_ptr_cst_p): Order checks according to expensiveness.
	(conversion_null_warnings): Likewise.
	* typeck.c (same_type_ignoring_top_level_qualifiers_p): Return
	early if type1 == type2.

From-SVN: r270539