PR middle-end/19857
	* fold-const.c (fold): Don't optimize (T)(x & cst) to
	(T)x & (T)cst if (T)cst overflows.
	* convert.c (convert_to_integer) <case POINTER_TYPE>: Pass
	TYPE_UNSIGNED (type) as type_for_size's UNSIGNEDP argument.

	* gcc.dg/tree-ssa/20050215-1.c: New test.
	* gcc.c-torture/execute/20050215-1.c: New test.

From-SVN: r95106