gcc/ChangeLog:

2017-04-26  Robin Dapp  <rdapp@linux.vnet.ibm.com>

	* tree-vect-data-refs.c (vect_peeling_hash_get_lowest_cost):
	Change cost model.
	(vect_peeling_hash_choose_best_peeling): Return extended peel info.
	(vect_peeling_supportable): Return peeling status.