S/390: Enable wraparound in s390_contiguous_bitmask_p.

S/390: Enable wraparound in s390_contiguous_bitmask_p.

gcc/ChangeLog:

2016-09-23  Dominik Vogt  <vogt@linux.vnet.ibm.com>

	* config/s390/predicates.md ("contiguous_bitmask_operand"): Adapt to new
	interface of s390_contiguous_bitmask_p.
	("contiguous_bitmask_nowrap_operand"): New predicate.
	* ("*anddi3_cc", "*anddi3_cconly", "*anddi3"): Replace NxxDq with NxxDw.
	* config/s390/constraints.md ("NxxDw", "NxxSq"): Adapt to new interface
	of s390_contiguous_bitmask_p.
	* ("NxxDw"): Rename NxxDq constraint to NxxDw.
	("NxxSw"): New constraint.
	* config/s390/s390.md ("*andsi3_zarch"): Enable bitmask wraparound.
	* config/s390/s390-protos.h (s390_contiguous_bitmask_p): Updated
	interface.
	(s390_contiguous_bitmask_nowrap_p): Export.
	* config/s390/s390.c (s390_contiguous_bitmask_nowrap_p): New name of
	former s390_contiguous_bitmask_p.
	(s390_contiguous_bitmask_p): Use s390_contiguous_bitmask_nowrap_p to
	detect contiguous bit ranges with wraparound.  Change signature to
	return START and END position instead of POS and LENGTH.
	(s390_contiguous_bitmask_vector_p): Remove extra code for continous bit
	ranges with wraparound.
	(s390_extzv_shift_ok): Use s390_contiguous_bitmask_nowrap_p.
	(s390_contiguous_bitmask_vector_p,s390_extzv_shift_ok,print_operand):
	Adapt to new signature of s390_contiguous_bitmask_p.

From-SVN: r240413