2011-07-07  Richard Guenther  <rguenther@suse.de>

	* tree-vrp.c (simplify_conversion_using_ranges): New function.
	(simplify_stmt_using_ranges): Call it.

	* gcc.dg/tree-ssa/vrp58.c: New testcase.
	* gcc.dg/tree-ssa/scev-cast.c: Adjust.

From-SVN: r175975