2015-10-26  Richard Biener  <rguenther@suse.de>
	Dominik Vogt  <vogt@linux.vnet.ibm.com>

	PR middle-end/67443
	* alias.c (ao_ref_from_mem): Remove promoted subreg handling.
	Properly prune ref->ref for accesses outside of ref.

	* gcc.target/s390/pr67443.c: New testcase.

Co-Authored-By: Dominik Vogt <vogt@linux.vnet.ibm.com>

From-SVN: r229372