re PR tree-optimization/66036 (strided group loads are not vectorized)

re PR tree-optimization/66036 (strided group loads are not vectorized)

2015-05-08  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/66036
	* tree-vect-data-refs.c (vect_compute_data_ref_alignment):
	Handle strided group loads.
	(vect_verify_datarefs_alignment): Likewise.
	(vect_enhance_data_refs_alignment): Likewise.
	(vect_analyze_group_access): Likewise.
	(vect_analyze_data_ref_access): Likewise.
	(vect_analyze_data_ref_accesses): Likewise.
	* tree-vect-stmts.c (vect_model_load_cost): Likewise.
	(vectorizable_load): Likewise.

	* gcc.dg/vect/slp-41.c: New testcase.

From-SVN: r222914