re PR tree-optimization/64909 (Missed vectorization with bdver1)

re PR tree-optimization/64909 (Missed vectorization with bdver1)

2015-04-04  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/64909
	PR tree-optimization/65660
	* tree-vectorizer.h (vect_get_known_peeling_cost): Adjust
	to take a cost vector for scalar iteration cost.
	(vect_get_single_scalar_iteration_cost): Likewise.
	* tree-vect-loop.c (vect_get_single_scalar_iteration_cost):
	Compute the scalar iteration cost into a cost vector.
	(vect_get_known_peeling_cost): Use the scalar cost vector to
	account for the cost of the peeled iterations.
	(vect_estimate_min_profitable_iters): Likewise.
	* tree-vect-data-refs.c (vect_peeling_hash_get_lowest_cost):
	Likewise.

From-SVN: r221866