* tree.c (operand_equal_for_phi_arg_p): New.
	* tree.h: Add a prototype for operand_equal_for_phi_arg_p.
	* tree-cfg.c, tree-ssa-dom.c, tree-ssa-phiopt.c, tree-ssa.c:
	Replace operand_equal_p with operand_for_phi_arg_p
	appropriately.

From-SVN: r91385