2016-04-25  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/70780
	* tree-ssa-pre.c (compute_antic_aux): Also return true if the block
	wasn't visited yet.
	(compute_antic): Mark blocks with abnormal preds as visited as
	they have a final empty antic-in solution already.

	* gcc.dg/torture/pr70780.c: New testcase.

From-SVN: r235407