tree-vect-stmts.c (vectorizable_load): Compute the pointer adjustment for gaps at the end of a SLP load group properly.

2015-06-08  Richard Biener  <rguenther@suse.de>

	* tree-vect-stmts.c (vectorizable_load): Compute the pointer
	adjustment for gaps at the end of a SLP load group properly.
	* tree-vect-slp.c (vect_supported_load_permutation_p): Allow
	all permutations we can generate.
	(vect_transform_slp_perm_load): Use the correct group-size.

	* gcc.dg/vect/slp-perm-10.c: New testcase.
	* gcc.dg/vect/slp-23.c: Adjust.
	* gcc.dg/torture/pr53366-2.c: Also verify cross-iteration
	vector pointer update.

From-SVN: r224221