2015-03-20  Richard Biener  <rguenther@suse.de>

	PR middle-end/64715
	* tree-chrec.c (chrec_fold_poly_cst): Use useless_type_conversion_p
	for type comparison and gcc_checking_assert.
	(chrec_fold_plus_poly_poly): Likewise.
	(chrec_fold_multiply_poly_poly): Likewise.
	(chrec_convert_1): Likewise.
	* gimplify.c (gimplify_expr): Remove premature folding of
	&X + CST to &MEM[&X, CST].

	* gcc.dg/pr15347.c: Use -O.
	* c-c++-common/pr19807-1.c: Likewise.

From-SVN: r221532