* loop.c (check_dbra_loop): New locals jump, first_compare, and
	compare_and_branch.  Call get_condition to set first_compare.
	Set compare_and_branch to number of compare/branch instructions.
	Replace PREV_INSN (PREV_INSN (loop_end)) with first_compare.
	Replace '2' with compare_and_branch.

From-SVN: r19435