* integrate.c (copy_rtx_and_substitute): Use simplify_gen_subreg.

	* integrate.c (copy_rtx_and_substitute): Use simplify_gen_subreg.
	(simplify_subreg): Handle complex types represented as CONCAT.

	* recog.c (validate_replace_rtx_1): Properly canonicalize expression
	* rtl.h (swap_commutative_operands_p): Declare.
	* rtlanal.c (swap_commutative_operands_p): New.
	(operand_preference): New static function.

	* combine.c (combine_simplify_rtx): Use swap_commutative_operands_p.
	(gen_binary): Likewise.
	* optabs.c (emit_cmp_and_jump_insns, emit_conditional_move): Likewise.
	* simplify-rtx.c (simplify_gen_binary,
	simplify_gen_relational): Likewise.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@42224 138bc75d-0d04-0410-961f-82ee72b054a4