* loop.h (struct movables): Remove `num'.
	* loop.c (scan_loop): Don't set it.  Use count_insns_in_loop.
	Adjust call to strength_reduce.
	(num_unmoved_movables): New function.
	(move_movables): Don't set movables->num.
	(strength_reduce): Compute the number of instructions in the loop
	here, rather than in the caller.
	(check_dbra_loop): Always clear reversible_mem_store if there
	are any memory sets.
	(loop_regs_scan): Don't count instructions here.
	(count_insn_in_loop): New function.

From-SVN: r41966