gcc/ChangeLog:
	* config/arc/arc-protos.h (arc_attr_type): Strengthen param from
	rtx to rtx_insn *.
	(arc_sets_cc_p): Likewise.
	* config/arc/arc.c (arc_print_operand): Use methods of
	"final_sequence" for clarity, and to enable strengthening of
	locals "jump" and "delay" from rtx to rtx_insn *.
	(arc_adjust_insn_length): Strengthen local "prev" from rtx to
	rtx_insn *; use method of rtx_sequence for typesafety.
	(arc_get_insn_variants): Use insn method of rtx_sequence for
	typesafety.
	(arc_pad_return): Likewise.
	(arc_attr_type): Strengthen param from rtx to rtx_insn *.
	(arc_sets_cc_p): Likewise.  Also, convert a GET_CODE check to a
	dyn_cast to rtx_sequence *, using insn method for typesafety.
	* config/arc/arc.h (ADJUST_INSN_LENGTH): Add checked casts to
	rtx_sequence * and use insn method when invoking get_attr_length.
	* config/bfin/bfin.c (type_for_anomaly): Strengthen param from rtx
	to rtx_insn *.  Replace a GET_CODE check with a dyn_cast to
	rtx_sequence *, introducing a local "seq", using its insn method
	from typesafety and clarity.
	(add_sched_insns_for_speculation): Strengthen local "next" from
	rtx to rtx_insn *.
	* config/c6x/c6x.c (get_insn_side): Likewise for param "insn".
	(predicate_insn): Likewise.
	* config/cris/cris-protos.h (cris_notice_update_cc): Likewise for
	second param.
	* config/cris/cris.c (cris_notice_update_cc): Likewise.
	* config/epiphany/epiphany-protos.h
	(extern void epiphany_insert_mode_switch_use): Likewise for param
	"insn".
	(get_attr_sched_use_fpu): Likewise for param.
	* config/epiphany/epiphany.c (epiphany_insert_mode_switch_use):
	Likewise for param "insn".
	* config/epiphany/mode-switch-use.c (insert_uses): Likewise for
	param "insn" of "target_insert_mode_switch_use" callback.
	* config/frv/frv.c (frv_insn_unit): Likewise for param "insn".
	(frv_issues_to_branch_unit_p): Likewise.
	(frv_pack_insn_p): Likewise.
	(frv_compare_insns): Strengthen locals "insn1" and "insn2" from
	const rtx * (i.e. mutable rtx_def * const *) to
	rtx_insn * const *.
	* config/i386/i386-protos.h (standard_sse_constant_opcode):
	Strengthen first param from rtx to rtx_insn *.
	(output_fix_trunc): Likewise.
	* config/i386/i386.c (standard_sse_constant_opcode): Likewise.
	(output_fix_trunc): Likewise.
	(core2i7_first_cycle_multipass_filter_ready_try): Likewise for
	local "insn".
	(min_insn_size): Likewise for param "insn".
	(get_mem_group): Likewise.
	(is_cmp): Likewise.
	(get_insn_path): Likewise.
	(get_insn_group): Likewise.
	(count_num_restricted): Likewise.
	(fits_dispatch_window): Likewise.
	(add_insn_window): Likewise.
	(add_to_dispatch_window): Likewise.
	(debug_insn_dispatch_info_file): Likewise.
	* config/m32c/m32c-protos.h (m32c_output_compare): Likewise for
	first param.
	* config/m32c/m32c.c (m32c_compare_redundant): Likewise for param
	"cmp" and local "prev".
	(m32c_output_compare): Likewise for param "insn".
	* config/m32r/predicates.md (define_predicate "small_insn_p"): Add
	a checked cast to rtx_insn * on "op" after we know it's an INSN_P.
	(define_predicate "large_insn_p"): Likewise.
	* config/m68k/m68k-protos.h (m68k_sched_attr_size): Strengthen
	param from rtx to rtx_insn *.
	(attr_op_mem m68k_sched_attr_op_mem): Likewise.
	* config/m68k/m68k.c (sched_get_attr_size_int): Likewise.
	(m68k_sched_attr_size): Likewise.
	(sched_get_opxy_mem_type): Likewise for param "insn".
	(m68k_sched_attr_op_mem): Likewise.
	(sched_mem_operand_p): Likewise.
	* config/mep/mep-protos.h (mep_multi_slot): Likewise for param.
	* config/mep/mep.c (mep_multi_slot): Likewise.
	* config/mips/mips-protos.h (mips_output_sync_loop): Likewise for
	first param.
	(mips_sync_loop_insns): Likewise.
	* config/mips/mips.c (mips_print_operand_punctuation): Use insn
	method of "final_sequence" for typesafety.
	(mips_process_sync_loop): Strengthen param "insn" from rtx to
	rtx_insn *.
	(mips_output_sync_loop): Likewise.
	(mips_sync_loop_insns): Likewise.
	(mips_74k_agen_init): Likewise.
	(mips_sched_init): Use NULL rather than NULL_RTX when working with
	insns.
	* config/nds32/nds32-fp-as-gp.c (nds32_symbol_load_store_p):
	Strengthen param "insn" from rtx to rtx_insn *.
	* config/nds32/nds32.c (nds32_target_alignment): Likewise for
	local "insn".
	* config/pa/pa-protos.h (pa_insn_refs_are_delayed): Likewise for
	param.
	* config/pa/pa.c (pa_output_function_epilogue): Likewise for local
	"insn".  Use method of rtx_sequence for typesafety.
	(branch_to_delay_slot_p): Strengthen param "insn" from rtx to
	rtx_insn *.
	(branch_needs_nop_p): Likewise.
	(use_skip_p): Likewise.
	(pa_insn_refs_are_delayed): Likewise.
	* config/rl78/rl78.c (rl78_propogate_register_origins): Likewise
	for locals "insn", "ninsn".
	* config/rs6000/rs6000.c (is_microcoded_insn): Likewise for param
	"insn".
	(is_cracked_insn): Likewise.
	(is_branch_slot_insn): Likewise.
	(is_nonpipeline_insn): Likewise.
	(insn_terminates_group_p): Likewise.
	(insn_must_be_first_in_group): Likewise.
	(insn_must_be_last_in_group): Likewise.
	(force_new_group): Likewise for param "next_insn".
	* config/s390/s390.c (s390_get_sched_attrmask): Likewise for param
	"insn".
	(s390_sched_score): Likewise.
	* config/sh/sh-protos.h (output_branch): Likewise for param 2.
	(rtx sfunc_uses_reg): Likewise for sole param.
	* config/sh/sh.c (sh_print_operand): Use insn method of
	final_sequence for typesafety.
	(output_branch): Strengthen param "insn" from rtx to rtx_insn *.
	Use insn method of final_sequence for typesafety.
	(sfunc_uses_reg): Strengthen param "insn" from rtx to rtx_insn *.
	* config/sparc/sparc-protos.h (eligible_for_call_delay): Likewise
	for param.
	(eligible_for_return_delay): Likewise.
	(eligible_for_sibcall_delay): Likewise.
	* config/sparc/sparc.c (eligible_for_call_delay): Likewise.
	(eligible_for_return_delay): Likewise.
	(eligible_for_sibcall_delay): Likewise.
	* config/stormy16/stormy16-protos.h
	(xstormy16_output_cbranch_hi): Likewise for final param.
	(xstormy16_output_cbranch_si): Likewise.
	* config/stormy16/stormy16.c (xstormy16_output_cbranch_hi): LIkewise.
	(xstormy16_output_cbranch_si): Likewise.
	* config/v850/v850-protos.h (notice_update_cc): Likewise.
	* config/v850/v850.c (notice_update_cc): Likewise.

	* final.c (get_attr_length_1): Strengthen param "insn" and param
	of "fallback_fn" from rtx to rtx_insn *, eliminating a checked cast.
	(get_attr_length): Strengthen param "insn" from rtx to rtx_insn *.
	(get_attr_min_length): Likewise.
	(shorten_branches): Likewise for signature of locals "length_fun"
	and "inner_length_fun".  Introduce local rtx_sequence * "seqn"
	from a checked cast and use its methods for clarity and to enable
	strengthening local "inner_insn" from rtx to rtx_insn *.
	* genattr.c (gen_attr): When writing out the prototypes of the
	various generated "get_attr_" functions, strengthen the params of
	the non-const functions from rtx to rtx_insn *.
	Similarly, strengthen the params of insn_default_length,
	insn_min_length, insn_variable_length_p, insn_current_length.
	(main): Similarly, strengthen the param of num_delay_slots,
	internal_dfa_insn_code, insn_default_latency, bypass_p,
	insn_latency, min_issue_delay, print_reservation,
	insn_has_dfa_reservation_p and of the "internal_dfa_insn_code" and
	"insn_default_latency" callbacks.  Rename hook_int_rtx_unreachable
	to hook_int_rtx_insn_unreachable.
	* genattrtab.c (write_attr_get): When writing out the generated
	"get_attr_" functions, strengthen the param "insn" from rtx to
	rtx_insn *, eliminating a checked cast.
	(make_automaton_attrs): When writing out prototypes of
	"internal_dfa_insn_code_", "insn_default_latency_" functions
	and the "internal_dfa_insn_code" and "insn_default_latency"
	callbacks, strengthen their params from rtx to rtx_insn *
	* genautomata.c (output_internal_insn_code_evaluation): When
	writing out code, add a checked cast from rtx to rtx_insn * when
	invoking DFA_INSN_CODE_FUNC_NAME aka dfa_insn_code.
	(output_dfa_insn_code_func): Strengthen param of generated
	function "dfa_insn_code_enlarge" from rtx to rtx_insn *.
	(output_trans_func): Likewise for generated function
	"state_transition".
	(output_internal_insn_latency_func): When writing out generated
	function "internal_insn_latency", rename params from "insn" and
	"insn2" to "insn_or_const0" and "insn2_or_const0".  Reintroduce
	locals "insn" and "insn2" as rtx_insn * with checked casts once
	we've proven that we're not dealing with const0_rtx.
	(output_insn_latency_func):  Strengthen param of generated
	function "insn_latency" from rtx to rtx_insn *.
	(output_print_reservation_func): Likewise for generated function
	"print_reservation".
	(output_insn_has_dfa_reservation_p): Likewise for generated
	function "insn_has_dfa_reservation_p".
	* hooks.c (hook_int_rtx_unreachable): Rename to...
	(hook_int_rtx_insn_unreachable): ...this, and strengthen param
	from rtx to rtx_insn *.
	* hooks.h (hook_int_rtx_unreachable): Likewise.
	(extern int hook_int_rtx_insn_unreachable): Likewise.
	* output.h (get_attr_length): Strengthen param from rtx to rtx_insn *.
	(get_attr_min_length): Likewise.
	* recog.c (get_enabled_alternatives): Likewise.
	* recog.h (alternative_mask get_enabled_alternatives): Likewise.
	* reorg.c (find_end_label): Introduce local rtx "pat" and
	strengthen local "insn" from rtx to rtx_insn *.
	(redundant_insn): Use insn method of "seq" rather than element for
	typesafety; strengthen local "control" from rtx to rtx_insn *.
	* resource.c (mark_referenced_resources): Add checked cast to
	rtx_insn * within INSN/JUMP_INSN case.
	(mark_set_resources): Likewise.
	* sel-sched.c (estimate_insn_cost): Strengthen param "insn" from
	rtx to rtx_insn *.

From-SVN: r215271