2007-10-12  Richard Guenther  <rguenther@suse.de>

	PR middle-end/26198
	* tree-ssa-forwprop.c (can_propagate_from): Do not propagate from
	a rhs with side-effects or which is a load.
	(forward_propagate_into_cond): Also try combining both operands.

	* gcc.dg/tree-ssa/forwprop-3.c: New testcase.
	* gcc.c-torture/execute/20071011-1.c: Likewise.
	* gcc.dg/tree-ssa/ssa-pre-9.c: Adjust.

From-SVN: r129256