* cfgloop.h (struct loop_desc): Removed.
	(struct loop): Fields simple, desc and has_desc removed.
	(simple_loop_p, count_loop_iterations): Declaration removed.
	* cfgloopanal.c (struct unmark_altered_insn_data): Removed.
	(unmark_altered, blocks_invariant_registers, unmark_altered_insn
	blocks_single_set_registers, invariant_rtx_wrto_regs_p_helper,
	invariant_rtx_wrto_regs_p, test_for_iteration, constant_iterations,
	simple_loop_exit_p, variable_initial_value, variable_initial_values,
	simple_condition_p, simple_increment, count_strange_loop_iterations,
	inverse, fits_in_mode_p, simple_loop_p, count_loop_iterations):
	Removed.
	* loop-iv.c (check_simple_exit, find_simple_exit): Update comments.

From-SVN: r78777