builtins.c (get_pointer_alignment_1): Handle POINTER_PLUS_EXPR.

builtins.c (get_pointer_alignment_1): Handle POINTER_PLUS_EXPR.

2015-07-02  Richard Biener  <rguenther@suse.de>

	* builtins.c (get_pointer_alignment_1): Handle POINTER_PLUS_EXPR.
	* fold-const.c (get_pointer_modulus_and_residue): Remove.
	(fold_binary_loc): Implement (T)ptr & CST in terms of
	get_pointer_alignment_1.
	* tree-vect-loop-manip.c (vect_gen_niters_for_prolog_loop):
	Make sure to build the alignment test on a SSA name without
	final alignment info valid only after the prologue.

From-SVN: r225310