2007-10-31  Richard Guenther  <rguenther@suse.de>

	PR middle-end/33779
	* fold-const.c (extract_muldiv_1): Make sure to not introduce
	new undefined integer overflow.
	(fold_binary): Avoid useless conversion.

	* gcc.c-torture/execute/pr33779-1.c: New testcase.
	* gcc.c-torture/execute/pr33779-2.c: Likewise.

From-SVN: r129796