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.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@129796 138bc75d-0d04-0410-961f-82ee72b054a4