2007-11-12  Richard Guenther  <rguenther@suse.de>

	PR middle-end/34070
	* fold-const.c (fold_binary): If testing for non-negative
	operands with tree_expr_nonnegative_warnv_p make sure to
	use op0 which has all (sign) conversions retained.

	* gcc.c-torture/execute/pr34070-1.c: New testcase.
	* gcc.c-torture/execute/pr34070-2.c: Likewise.

From-SVN: r130098