2009-04-29  Richard Guenther  <rguenther@suse.de>

	PR middle-end/39937
	* tree-ssa-forwprop.c (forward_propagate_addr_expr_1): Do not
	loose type conversions.
	(forward_propagate_addr_expr): Fix tuplification bug.  Remove
	stmts only if there are no uses of its definition.

	* gcc.c-torture/compile/pr39937.c: New testcase.

From-SVN: r146973