* cfganal.c (single_pred_edge_ignoring_loop_edges): New function
	extracted from tree-ssa-dom.c.
	* cfganal.h (single_pred_edge_ignoring_loop_edges): Prototype.
	* tree-ssa-dom.c (single_incoming_edge_ignoring_loop_edges): Remove.
	(record_equivalences_from_incoming_edge): Add additional argument
	to single_pred_edge_ignoring_loop_edges call.
	* tree-ssa-uncprop.c (single_incoming_edge_ignoring_loop_edges): Remove.
	(uncprop_dom_walker::before_dom_children): Add additional argument
	to single_pred_edge_ignoring_loop_edges call.
	* tree-ssa-sccvn.c (sccvn_dom_walker::before_dom_children): Use
	single_pred_edge_ignoring_loop_edges rather than open coding.
	* tree-vrp.c (evrp_dom_walker::before_dom_children): Similarly.

From-SVN: r254383