2006-02-02  Zdenek Dvorak <dvorakz@suse.cz>
	    Daniel Berlin  <dberlin@dberlin.org>

	* tree-tailcall.c (arg_needs_copy_p): New function.
	(eliminate_tail_call): Use arg_needs_copy_p.
	(tree_optimize_tail_calls_1): Ditto. Also call add_virtual_phis.
	(add_virtual_phis): New function.


Co-Authored-By: Daniel Berlin <dberlin@dberlin.org>

From-SVN: r110530