re PR tree-optimization/91178 (Infinite recursion in split_constant_offset in slp...

re PR tree-optimization/91178 (Infinite recursion in split_constant_offset in slp after r260289)

2019-07-17  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/91178
	* tree-vect-stmts.c (get_group_load_store_type): For SLP
	loads with a gap larger than the vector size always use
	VMAT_STRIDED_SLP.
	(vectorizable_load): For VMAT_STRIDED_SLP with a permutation
	avoid loading vectors that are only contained in the gap
	and thus are not needed.

	* gcc.dg/torture/pr91178.c: New testcase.

From-SVN: r273549