gcc/
	* recog.h (operand_alternative): Convert reg_class, reject,
	matched and matches into bitfields.
	(preprocess_constraints): New overload.
	(preprocess_insn_constraints): New function.
	(preprocess_constraints): Take the insn as parameter.
	(recog_op_alt): Change into a pointer.
	(target_recog): Add x_op_alt.
	* recog.c (asm_op_alt): New variable.
	(recog_op_alt): Change into a pointer.
	(preprocess_constraints): New overload, replacing the old function
	definition with one that doesn't use global state.
	(preprocess_insn_constraints): New function.
	(preprocess_constraints): Use them.  Take the insn as parameter.
	Use asm_op_alt for asms.
	(recog_init): Free existing x_op_alt entries.
	* ira-lives.c (check_and_make_def_conflict): Make operand_alternative
	pointer const.
	(make_early_clobber_and_input_conflicts): Likewise.
	(process_bb_node_lives): Pass the insn to process_constraints.
	* reg-stack.c (check_asm_stack_operands): Likewise.
	(subst_asm_stack_regs): Likewise.
	* regcprop.c (copyprop_hardreg_forward_1): Likewise.
	* regrename.c (build_def_use): Likewise.
	* sched-deps.c (sched_analyze_insn): Likewise.
	* sel-sched.c (get_reg_class, implicit_clobber_conflict_p): Likewise.
	* config/arm/arm.c (xscale_sched_adjust_cost): Likewise.
	(note_invalid_constants): Likewise.
	* config/i386/i386.c (ix86_legitimate_combined_insn): Likewise.
	(ix86_legitimate_combined_insn): Make operand_alternative pointer
	const.

From-SVN: r211240