hw-doloop.c: New file.

hw-doloop.c: New file.

	* hw-doloop.c: New file.
	* hw-doloop.h: New file.
	* Makefile.in (OBJS): Add hw-doloop.o.
	(hw-doloop.o): New rule.
	($(obj_out_file)): Add hw-doloop.h dependency.
	* config/bfin/bfin.c: Include "hw-doloop.h".
	(loop_info, DEF_VEC_P for loop_info, loop_info_d): Remove.
	(bfin_dump_loops, bfin_bb_in_loop, bfin_scan_loop): Remove.
	(hwloop_optimize): Renamed from bfin_optimize_loop.  Argument
	type changed to hwloop_info.  Return bool, true if the loop was
	successfully optimized.  Remove code that was moved to
	hw-doloop.c, and adjust other parts.
	(hwloop_fail): New static function, containing parts that used
	to be in bfin_optimize_loop.
	(bfin_discover_loop, bfin_discover_loops, free_loops,
	bfin_reorder_loops): Remove.
	(hwloop_pattern_reg): New static function.
	(bfin_doloop_hooks): New variable.
	(bfin_reorg_loops): Remove most code, call reorg_loops.
	* config/bfin/bfin.md (doloop_end splitter): Also enable if
	loop counter is a memory_operand.

From-SVN: r175985