* tree-ssa-dom.c (cprop_into_stmt): Do not call
	recompute_tree_invariant_for_addr_expr here.
	(optimize_stmt): Call it here instead and do so if anything
	at all has changed in the statement and the RHS is an ADDR_EXPR.
	* tree-ssa-forwprop.c (tidy_after_forward_propagate_addr): If
	needed, call recompute_tree_invariant_for_addr_expr.
	* tree-ssa-propagate.c (substitute_and_fold): Call
	recompute_tree_invariant_for_addr_expr as needed.


	* gcc.c-torture/compile/pr21638.c: New test.
	* gcc.c-torture/compile/20050520-1.c: New test.

From-SVN: r100092