2008-10-06  Eric Botcazou  <ebotcazou@adacore.com>

	* gcc-interface/utils.c (can_fold_for_view_convert_p): New predicate.
	(unchecked_convert): Use it to disable problematic folding with
	VIEW_CONVERT_EXPR in the general case.  Always disable it for the
	special VIEW_CONVERT_EXPR built for integral types and cope with
	its addressability issues by preserving the first conversion.

From-SVN: r140902