Remove BB_HEAD, BB_END, BB_HEADER scaffolding

Remove BB_HEAD, BB_END, BB_HEADER scaffolding

gcc/
	* basic-block.h (struct rtl_bb_info): Strengthen fields "end_"
	and "header_" from rtx to rtx_insn *.
	(struct basic_block_d): Likewise for field "head_" within "x"
	field of union basic_block_il_dependent.
	(BB_HEAD): Drop function...
	(SET_BB_HEAD): ...and this function in favor of...
	(BB_HEAD): ...reinstate macro.
	(BB_END): Drop function...
	(SET_BB_END): ...and this function in favor of...
	(BB_END): ...reinstate macro.
	(BB_HEADER): Drop function...
	(SET_BB_HEADER): ...and this function in favor of...
	(BB_HEADER): ...reinstate macro.

	* bb-reorder.c (add_labels_and_missing_jumps): Drop use of BB_END.
	(fix_crossing_unconditional_branches): Likewise.
	* caller-save.c (save_call_clobbered_regs): Likewise.
	(insert_one_insn): Drop use of SET_BB_HEAD and SET_BB_END.
	* cfgbuild.c (find_bb_boundaries): Drop use of SET_BB_END.
	* cfgcleanup.c (merge_blocks_move_successor_nojumps): Likewise.
	(merge_blocks_move_successor_nojumps): Likewise.
	(outgoing_edges_match): Update use of for_each_rtx to
	for_each_rtx_in_insn.
	* cfgexpand.c (expand_gimple_cond): Drop use of SET_BB_END.
	(expand_gimple_cond): Likewise.
	(expand_gimple_tailcall): Likewise.
	(expand_gimple_basic_block): Drop use of SET_BB_HEAD and
	SET_BB_END.
	(construct_exit_block): Drop use of SET_BB_END.
	* cfgrtl.c (cfg_layout_function_footer): Strengthen from rtx to
	rtx_insn *.
	(delete_insn): Rename param "insn" to "uncast_insn", introducing
	a new local "insn" with a checked cast to rtx_insn *.  Drop use of
	SET_BB_HEAD and SET_BB_END.
	(create_basic_block_structure): Drop use of SET_BB_HEAD and
	SET_BB_END.
	(rtl_delete_block): Drop use of SET_BB_HEAD.
	(rtl_split_block): Drop use of SET_BB_END.
	(emit_nop_for_unique_locus_between): Likewise.
	(rtl_merge_blocks): Drop use of SET_BB_END and SET_BB_HEAD.
	(block_label): Drop use of SET_BB_HEAD.
	(fixup_abnormal_edges): Drop use of SET_BB_END.
	(record_effective_endpoints): Drop use of SET_BB_HEADER.
	(relink_block_chain): Likewise.
	(fixup_reorder_chain): Drop use of SET_BB_END.
	(cfg_layout_duplicate_bb): Drop use of SET_BB_HEADER.
	(cfg_layout_delete_block): Strengthen local "to" from rtx * to
	rtx_insn **.  Drop use of SET_BB_HEADER.
	(cfg_layout_merge_blocks): Drop use of SET_BB_HEADER, SET_BB_END,
	SET_BB_HEAD.
	(BB_HEAD): Delete this function.
	(SET_BB_HEAD): Likewise.
	(BB_END): Likewise.
	(SET_BB_END): Likewise.
	(BB_HEADER): Likewise.
	(SET_BB_HEADER): Likewise.
	* emit-rtl.c (add_insn_after):  Rename param "insn" to
	"uncast_insn", adding a new local "insn" and a checked cast to
	rtx_insn *.  Drop use of SET_BB_END.
	(remove_insn): Strengthen locals "next" and "prev" from rtx to
	rtx_insn *.  Drop use of SET_BB_HEAD and SET_BB_END.
	(reorder_insns): Drop use of SET_BB_END.
	(emit_insn_after_1): Strengthen param "first" and locals "last",
	"after_after" from rtx to rtx_insn *.  Drop use of SET_BB_END.
	(emit_pattern_after_noloc): Add checked cast.
	* haifa-sched.c (get_ebb_head_tail): Drop use of SET_BB_END.
	(restore_other_notes): Likewise.
	(move_insn): Likewise.
	(sched_extend_bb): Likewise.
	(fix_jump_move): Likewise.
	* ifcvt.c (noce_process_if_block): Likewise.
	(dead_or_predicable): Likewise.
	* ira.c (update_equiv_regs): Drop use of SET_BB_HEAD.
	* reg-stack.c (change_stack): Drop use of SET_BB_END.
	* sel-sched-ir.c (sel_move_insn): Likewise.
	* sel-sched.c (move_nop_to_previous_block): Likewise.

	* config/c6x/c6x.c (hwloop_optimize): Drop use of SET_BB_HEAD and
	SET_BB_END.
	* config/ia64/ia64.c (emit_predicate_relation_info): Likewise.

/
	* rtx-classes-status.txt (TODO): SET_BB_HEAD, SET_BB_END,
	SET_BB_HEADER are done.

From-SVN: r214534