2011-01-14  Richard Guenther  <rguenther@suse.de>

	PR middle-end/47281
	Revert
	2011-01-11  Richard Guenther  <rguenther@suse.de>

        PR tree-optimization/46076
        * tree-ssa.c (useless_type_conversion_p): Conversions from
        unprototyped to empty argument list function types are useless.

	* gcc.dg/torture/pr47281.c: New testcase.
	* gcc.dg/tree-ssa/pr46076.c: XFAIL.

From-SVN: r168781