* loop.c (this_loop_info): Delete.

	(uid_loop): Add in place of uid_loop_num.  All uses updated.
 	(loop_number_exit_count): Delete and replace with entry in loop
	structure.  All uses updated.
	(loop_number_loop_starts, loop_number_loop_ends): Likewise.
	(loop_number_loop_cont, loop_number_cont_dominator): Likewise.
	(loop_outer_loop): Likewise.
	(loop_invalid, loop_number_exit_labels): Likewise.
	(loop_used_count_register): Delete and replace with entry in
	loop_info structure.
	(find_and_verify_loops): Add loops argument.
	(verify_dominator, mark_loop_jump, prescan_loop): Replace loop_start,
	loop_end, etc. arguments with loop structure pointer.  All callers
	changed.
	(loop_reg_used_before_p, scan_loop, strength_reduce): Likewise.
	(check_dbra_loop, next_insn_in_loop, try_copy_prop): Likewise.
	(load_mems_and_recount_loop_regs_set, load_mems): Likewise.
	(insert_bct): Likewise.
	(basic_induction_var): New argument level.
	* loop.h (struct loop_info): Delete fields num, loops_enclosed,
	vtop, and cont.  Add used_count_register.
	(uid_loop): Delete declaration.
 	(loop_number_exit_count): Likewise.
	(loop_number_loop_starts, loop_number_loop_ends): Likewise.
	(loop_number_loop_cont, loop_number_cont_dominator): Likewise.
	(loop_outer_loop, loop_used_count_register): Likewise.
	(loop_invalid, loop_number_exit_labels): Likewise.
	(unroll_loop): Replace loop_start and loop_end arguments
 	with loop structure pointer.
	(loop_precondition_p, loop_iterations): Likewise.
	Include basic-block.h.
	* unroll.c: (unroll_loop): Replace loop_start and loop_end arguments
 	with loop structure pointer.
	(loop_precondition_p, loop_iterations): Likewise.
	* basic-block.h (struct loop): New entries vtop, cont,
 	cont_dominator, start, end, top, scan_start, exit_labels,
	exit_count.
	* Makefile.in (LOOP_H): Add basic-block.h to dependencies.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@31434 138bc75d-0d04-0410-961f-82ee72b054a4

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