* hooks.c (hook_bool_rtx_int_false): New function.
	* hooks.h (hook_bool_rtx_int_false): Declare.
	* target-def.h (TARGET_COMMUTATIVE_P): Define.
	(TARGET_INITIALIZER): Add TARGET_COMMUTATIVE_P.
	* target.h (struct gcc_target): Add commutative_p member.
	* targhooks.c (hook_bool_rtx_commutative_p): New function.
	* targhooks.h (hook_bool_rtx_commutative_p): Declare.
	* pa.c (TARGET_COMMUTATIVE_P): Redefine.
	(pa_commutative_p): New function.
	* jump.c (target.h): Include.
	(rtx_renumbered_equal_p): Use targetm.commutative_p.
	* doc/tm.texi: Document TARGET_COMMUTATIVE_P.

From-SVN: r101706