The attached patch fixes PR fortran/81509.

In short, F2008 now allows boz-literal-constants in IAND, IOR, IEOR,
DSHIFTL, DSHIFTR, and MERGE_BITS.  gfortran currently allows BOZ
argument, but she was not enforcing restrictions in F2008.  The
attach patch causes gfortran to conform to F2008.

As aside effect, the patch removes a questionable GNU Fortran
extension that allowed arguments to IAND, IOR, and IEOR to have
different kind type parameters.  The behavior of this extension
was not documented.

2017-09-27  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/81509
	* check.c: Rename function gfc_check_iand to gfc_check_iand_ieor_ior.
	* check.c (boz_args_check): New function.  Check I and J not both BOZ.
	(gfc_check_dshift,gfc_check_iand_ieor_ior, gfc_check_ishft,
	 gfc_check_and, gfc_check_merge_bits): Use it.
	* check.c (gfc_check_iand_ieor_ior): Force conversion of BOZ to kind
	type of other agrument.  Remove silly GNU extension.
	(gfc_check_ieor, gfc_check_ior): Delete now unused functions.
	* intrinsic.c (add_functions): Use gfc_check_iand_ieor_ior. Wrap long
	line.
	* intrinsic.h: Rename gfc_check_iand to gfc_check_iand_ieor_ior.
	Delete prototype for bool gfc_check_ieor and gfc_check_ior
	* intrinsic.texi: Update documentation for boz-literal-constant.

2017-09-27  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/81509
	* gfortran.dg/graphite/id-26.f03: Fix non-conforming use of IAND.
	* gfortran.dg/pr81509_1.f90: New test.
	* gfortran.dg/pr81509_2.f90: New test.

-- 
Steve
20170425 https://www.youtube.com/watch?v=VWUpyCsUKR4
20161221 https://www.youtube.com/watch?v=IbCHE-hONow