* gimple-ssa-evrp.c (evrp_dom_walker::cleanup): Call
	vr_values::cleanup_edges_and_switches.
	* tree-vrp.c (to_remove_edges, to_update_switch_stmts): Moved into
	vr_values class.
	(identify_jump_threads): Remove EDGE_IGNORE handling.
	(execute_vrp): Move handling of to_remove_edges and
	to_update_switch_stmts into vr_values class member functions.
	* tree-vrp.h (switch_update, to_remove_edges): Remove declarations.
	(to_update_switch_stmts): Likewise.
	* vr-values.c: Include cfghooks.h.
	(vr_values::vr_values): Initialize to_remove_edges and
	to_update_switch_stmts.
	(vr_values::~vr_values): Verify to_remove_edges and
	to_update_switch_stmts are empty.
	(vr_values::simplify_switch_using_ranges): Set EDGE_IGNORE as needed.
	(vr_values::cleanup_edges_and_switches): New member function.
	* vr-values.h (vr_values): Add cleanup_edges_and_switches member
	function.  Add new data members.

	* gcc.dg/tree-ssa/vrp113.c: Disable EVRP.
	* gcc.dg/tree-ssa/vrp120.c: New test.

From-SVN: r264491