* tree.c (cp_expr_location): New.

	* cp-tree.h (cp_expr_loc_or_loc): New.
	* call.c, cvt.c, constexpr.c, constraint.cc, cp-gimplify.c, decl.c,
	error.c, init.c, lex.c, parser.c, pt.c, semantics.c, typeck.c,
	typeck2.c: Use it instead of EXPR_LOC_OR_LOC.

From-SVN: r261728