re PR tree-optimization/70130 (h264ref fails with verification error starting with r231674 (r224221 is the true start of the problem))

2016-04-15  Richard Biener  <rguenther@suse.de>
	Alan Modra  <amodra@gmail.com>

	PR tree-optimization/70130
	* tree-vect-data-refs.c (vect_supportable_dr_alignment): Detect
	when alignment stays not the same and no not use the realign
	scheme then.

	* gcc.dg/vect/O3-pr70130.c: New testcase.

Co-Authored-By: Alan Modra <amodra@gmail.com>

From-SVN: r235006