gcc/
	* tree-vectorizer.h (vect_strided_store_supported): Add a
	HOST_WIDE_INT argument.
	(vect_strided_load_supported): Likewise.
	(vect_permute_store_chain): Return void.
	(vect_transform_strided_load): Likewise.
	(vect_permute_load_chain): Delete.
	* tree-vect-data-refs.c (vect_strided_store_supported): Take a
	count argument.  Check that the count is a power of two.
	(vect_strided_load_supported): Likewise.
	(vect_permute_store_chain): Return void.  Update after above changes.
	Assert that the access is supported.
	(vect_permute_load_chain): Likewise.
	(vect_transform_strided_load): Return void.
	* tree-vect-stmts.c (vectorizable_store): Update calls after
	above interface changes.
	(vectorizable_load): Likewise.
	(vect_analyze_stmt): Don't check for strided powers of two here.

From-SVN: r172428