* arm-protos.h (tune_params): New structure.

	* arm-protos.h (tune_params): New structure.
	* arm.c (current_tune): New variable.
	(arm_constant_limit): Delete.
	(struct processors): Add pointer to the tune parameters.
	(arm_slowmul_tune): New tuning option.
	(arm_fastmul_tune, arm_xscale_tune, arm_9e_tune): Likewise.
	(all_cores): Adjust to pick up the tuning model.
	(arm_constant_limit): New function.
	(arm_override_options): Select the appropriate tuning model.  Delete
	initialization of arm_const_limit.
	(arm_split_constant): Use the new constant-limit model.
	(arm_rtx_costs): Pick up the current tuning model.
	* arm.md (is_strongarm, is_xscale): Delete.
	* arm-generic.md (load_ldsched_x, load_ldsched): Test explicitly
	for Xscale variant architectures.
	(mult_ldsched_strongarm, mult_ldsched): Similarly for StrongARM.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@158463 138bc75d-0d04-0410-961f-82ee72b054a4