re PR tree-optimization/62031 (Different results between O2 and O2 -fpredictive-commo...

re PR tree-optimization/62031 (Different results between O2 and O2 -fpredictive-commoning)

2014-08-15  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/62031
	* tree-data-ref.c (dr_analyze_indices): Do not set
	DR_UNCONSTRAINED_BASE.
	(dr_may_alias_p): All indirect accesses have to go the
	formerly DR_UNCONSTRAINED_BASE path.
	* tree-data-ref.h (struct indices): Remove
	unconstrained_base member.
	(DR_UNCONSTRAINED_BASE): Remove.

	* gcc.dg/torture/pr62031.c: New testcase.

From-SVN: r214006