recog.h (alternative_class): New function.

recog.h (alternative_class): New function.

gcc/
	* recog.h (alternative_class): New function.
	(which_op_alt): Return a const recog_op_alt.
	* reg-stack.c (check_asm_stack_operands): Update type accordingly.
	(subst_asm_stack_regs): Likewise.
	* config/arm/arm.c (note_invalid_constants): Likewise.
	* regcprop.c (copyprop_hardreg_forward_1): Likewise.  Don't modify
	the operand_alternative; use alternative class instead.
	* sel-sched.c (get_reg_class): Likewise.
	* regrename.c (build_def_use): Likewise.
	(hide_operands, restore_operands, record_out_operands): Update type
	accordingly.

From-SVN: r211238