md.texi (automata_option): Document collapse-ndfa.

	* doc/md.texi (automata_option): Document collapse-ndfa.
	* genautomata.c (COLLAPSE_OPTION): New macro.
	(collapse_flag): New static variable.
	(struct description): New member normal_decls_num.
	(struct automaton): New members advance_ainsn and collapse_ainsn.
	(gen_automata_option): Check for COLLAPSE_OPTION.
	(collapse_ndfa_insn_decl): New static variable.
	(add_collapse_ndfa_insn_decl, special_decl_p): New functions.
	(find_arc): If insn is the collapse-ndfa insn, accept any arc we
	find.
	(transform_insn_regexps): Call add_collapse_ndfa_insn_decl if
	necessary.  Use normal_decls_num rather than decls_num, remove
	test for special decls.
	(create_alt_states, form_ainsn_with_same_reservs): Use
	special_decl_p.
	(make_automaton); Likewise.  Use the new advance_cycle_insn member
	of struct automaton.
	(create_composed_state): Disallow advance-cycle arcs if collapse_flag
	is set.
	(NDFA_to_DFA): Don't create composed states for the collapse-ndfa
	transition.  Create the necessary transitions for it.
	(create_ainsns): Return void.  Take an automaton_t argument, and
	update its ainsn_list, advance_ainsn and collapse_ainsn members.  All
	callers changed.
	(COLLAPSE_NDFA_VALUE_NAME): New macro.
	(output_tables): Output code to define it.
	(output_internal_insn_code_evaluation): Output code to accept
	const0_rtx as collapse-ndfa transition.
	(output_default_latencies, output_print_reservation_func,
	output_print_description): Reorganize loops to use normal_decls_num
	as loop bound; remove special case for advance_cycle_insn_decl.
	(initiate_automaton_gen): Handle COLLAPSE_OPTION.
	(check_automata_insn_issues): Check for collapse_ainsn.
	(expand_automate): Allocate sufficient space.  Initialize
	normal_decls_num.

From-SVN: r178059