PR tree-optimization/33434
	* tree-inline.c (setup_one_parameter): If the value passed to
	a parameter is never used, don't set it up.

	* gcc.dg/pr33434-1.c: New test.
	* gcc.dg/pr33434-2.c: New test.
	* gcc.dg/pr33434-3.c: New test.
	* gcc.dg/pr33434-4.c: New test.

From-SVN: r130521