gcc/
	fold-const.c (fold_binary): Fold BIT_AND_EXPR's with a pointer operand.
	(get_pointer_modulus_and_residue): New function.

	gcc/testsuite/
	gcc.dg/fold-bitand-1.c: New test.
	gcc.dg/fold-bitand-2.c: New test.
	gcc.dg/fold-bitand-3.c: New test.
	gcc.dg/fold-bitand-4.c: New test.

From-SVN: r128701