2006-06-16  Michael Matz  <matz@suse.de>
	Richard Guenther  <rguenther@suse.de>

	* fold-const.c (fold_truthop): Only return new tree node if
	we canonicalized something.

Co-Authored-By: Richard Guenther <rguenther@suse.de>

From-SVN: r114713