2010-10-13  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/45982
	* tree-ssa-structalias.c (make_constraints_to): New function.
	(make_constraint_to): Implement in terms of make_constraints_to.
	(find_func_aliases): Properly make return values of pure/const
	functions escape if they assign to sth that is not a pointer.

	* gcc.dg/torture/pr45982.c: New testcase.
	* gcc.dg/tree-ssa/pr24287.c: Adjust.
	* gcc.dg/tree-ssa/pta-callused.c: Likewise.
	* gcc.dg/torture/pr39074-2.c: Likewise.

From-SVN: r165418