re PR tree-optimization/37005 (GNAT Bug Box for cd2a24e.adb:37 at tree-vrp.c:392)

2008-08-28  Richard Guenther  <rguenther@suse.de>

	PR middle-end/37005
	* fold-const.c (maybe_canonicalize_comparison_1): Require
	undefined overflow only for canonicalizing A +- CST cmp CST.
	Make sure to not generate new constants that are not inside
	their TYPE_MIN/MAX_VALUE range.
	(maybe_canonicalize_comparison): Remove undefined overflow
	checking from here.
	(fold_binary): Remove now duplicate folding.

From-SVN: r139702