* simplify-rtx.c (simplify_gen_binary): Use std::swap instead
	of manually swapping.
	(simplify_associative_operation): Likewise.
	(simplify_binary_operation): Likewise.
	(simplify_plus_minus): Likewise.
	(simplify_relational_operation): Likewise.
	(simplify_ternary_operation): Likewise.

From-SVN: r222465