dse.c: remove some typedefs that hide pointerness

dse.c: remove some typedefs that hide pointerness

gcc/ChangeLog:

2015-09-13  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>

	* dse.c (store_info_t): Remove typedef.
	(group_info_t): Likewise.
	(const_group_info_t): Likewise.
	(deferred_change_t): Likewise.
	(get_group_info): Adjust.
	(free_store_info): Likewise.
	(canon_address): Likewise.
	(clear_rhs_from_active_local_stores): Likewise.
	(record_store): Likewise.
	(replace_read): Likewise.
	(check_mem_read_rtx): Likewise.
	(scan_insn): Likewise.
	(remove_useless_values): Likewise.
	(dse_step1): Likewise.
	(dse_step2_init): Likewise.
	(dse_step2_nospill): Likewise.
	(scan_stores_nospill): Likewise.
	(scan_reads_nospill): Likewise.
	(dse_step3_exit_block_scan): Likewise.
	(dse_step3): Likewise.
	(dse_step5_nospill): Likewise.
	(dse_step6): Likewise.

From-SVN: r227719