2019-11-25  Richard Biener  <rguenther@suse.de>

	* cfgloop.h (get_loop_exit_edges): Add extra parameter denoting
	loop body, defaulted to NULL.
	(single_likely_exit): Add exit vector argument
	* tree-ssa-loop-niter.h (loop_only_exit_p): Add loop body argument.
	(number_of_iterations_exit): Likewise.
	(number_of_iterations_exit_assumptions): Likewise.
	* cfgloop.c (get_loop_exit_edges): Use passed in loop body
	if not NULL.
	* cfgloopanal.c (single_likely_exit): Use passed in exit vector.
	* tree-ssa-loop-ivcanon.c (canonicalize_loop_induction_variables):
	Compute exit vector around call to single_likely_exit.
	* tree-ssa-loop-ivopts.c (tree_ssa_iv_optimize_loop): Pass down
	loop body to loop_only_exit_p.
	* tree-ssa-loop-niter.c (loop_only_exit_p): Get loop body from
	caller.
	(number_of_iterations_exit_assumptions): Get loop body from caller
	if not NULL.
	(number_of_iterations_exit): Pass through new loop body arg.
	(infer_loop_bounds_from_undefined): Get loop body from caller.
	(estimate_numbers_of_iterations): Compute loop body once.

From-SVN: r278667