reorg.c: use vec<rtx_insn *> instead of rtx_insn_list for the delay insn list

reorg.c: use vec<rtx_insn *> instead of rtx_insn_list for the delay insn list

gcc/ChangeLog:

2015-10-06  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>

	* reorg.c (emit_delay_sequence): Store list of delay slot insns
	in a vector instead of rtx_insn_list.
	(add_to_delay_list): Likewise.
	(delete_from_delay_slot): Likewise.
	(optimize_skip): Likewise.
	(redirect_with_delay_list_safe_p): Likewise.
	(check_annul_list_true_false): Likewise.
	(steal_delay_list_from_target): Likewise.
	(steal_delay_list_from_fallthrough): Likewise.
	(redundant_insn): Likewise.
	(fill_simple_delay_slots): Likewise.
	(fill_slots_from_thread): Likewise.
	(fill_eager_delay_slots): Likewise.
	(relax_delay_slots): Likewise.

From-SVN: r228558