isl_local_space_divs_known: reuse isl_local_space_div_is_known
isl_local_space_divs_known: reuse isl_local_space_div_is_known

Signed-off-by: Sven Verdoolaege <e5350bbed4977f5eb8ae1dc6abd9ae59d21ace75@kotnet.org>

inducer/isl-mirror,UBERTC/isl,Meinersbur/isl,inducer/isl-mirror,UBERTC/isl,PollyLabs/isl,tobig/isl,nicolasvasilache/isl,Meinersbur/isl,UBERTC/isl,tobig/isl,BenzoSM/isl,BenzoSM/isl,PollyLabs/isl,inducer/isl-mirror,nicolasvasilache/isl,nicolasvasilache/isl,nicolasvasilache/isl,PollyLabs/isl,BenzoSM/isl,inducer/isl-mirror,inducer/isl-mirror,BenzoSM/isl,BenzoSM/isl,PollyLabs/isl,PollyLabs/isl,Meinersbur/isl,tobig/isl,nicolasvasilache/isl,Meinersbur/isl,tobig/isl,UBERTC/isl