2011-03-03  Richard Guenther  <rguenther@suse.de>

	PR middle-end/47283
	* tree-ssa-alias.c (ptr_deref_may_alias_decl_p): Make code
	match comment.
	(refs_may_alias_p_1): For release branches return true if
	we are confused by our input.

From-SVN: r170650