tree-ssa-structalias.c (rewrite_constraints): Don't test for directness anymore.

2007-10-17  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-structalias.c (rewrite_constraints): Don't test for
	directness anymore.
	(perform_var_substitution): Only DFS from real nodes. Don't test
	for directness.
	(unite_pointer_equivalences): Fix broken test.

From-SVN: r129401