tree-vrp.c (extract_range_from_unary_expr): Derive ranges for type conversions of a VR_VARYING source to a wider type.


	* tree-vrp.c (extract_range_from_unary_expr): Derive ranges for
	type conversions of a VR_VARYING source to a wider type.

	* gcc.dg/tree-ssa/vrp28.c: New test.

From-SVN: r112256