isl_qpolynomial_div_pow: allow nested divs
isl_qpolynomial_div_pow: allow nested divs

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

jleben/isl,serge-sans-paille/isl,cfx-next/toolchain_isl-upstream,cfx-next/toolchain_isl-upstream,nicolasvasilache/isl,SaberMod/isl-current,serge-sans-paille/isl,tobig/isl,UBERTC/isl,simbuerg/isl,inducer/isl-mirror,VanirLLVM/toolchain_isl,KangDroidSMProject/ISL,epowers/isl,inducer/isl-mirror,pierrotdelalune/isl,BenzoSM/isl,UBERTC/isl,nicolasvasilache/isl,Meinersbur/isl,KangDroidSMProject/ISL,Meinersbur/isl,epowers/isl,simbuerg/isl,cfx-next/toolchain_isl-upstream,Meinersbur/isl,tobig/isl,inducer/isl-mirror,serge-sans-paille/isl,abduld/isl,simbuerg/isl,crossbuild/isl,epowers/isl,crossbuild/isl,nicolasvasilache/isl,evaautomation/isl,evaautomation/isl,tobig/isl,BobSaget-Mod/libisl,UBERTC/isl,abduld/isl,pierrotdelalune/isl,epowers/isl,simbuerg/isl,Distrotech/isl,Distrotech/isl,crossbuild/isl,PollyLabs/isl,BenzoSM/isl,tobig/isl,SaberMod/isl-current,PollyLabs/isl,inducer/isl-mirror,UBERTC/isl,abduld/isl,crossbuild/isl,evaautomation/isl,jleben/isl,Distrotech/isl,BenzoSM/isl,jleben/isl,Distrotech/isl,BobSaget-Mod/libisl,jleben/isl,BobSaget-Mod/libisl,cfx-next/toolchain_isl-upstream,pierrotdelalune/isl,VanirLLVM/toolchain_isl,simbuerg/isl,serge-sans-paille/isl,SaberMod/isl-current,BenzoSM/isl,BenzoSM/isl,Distrotech/isl,BobSaget-Mod/libisl,PollyLabs/isl,inducer/isl-mirror,Meinersbur/isl,PollyLabs/isl,pierrotdelalune/isl,KangDroidSMProject/ISL,nicolasvasilache/isl,cfx-next/toolchain_isl-upstream,KangDroidSMProject/ISL,SaberMod/isl-current,VanirLLVM/toolchain_isl,serge-sans-paille/isl,VanirLLVM/toolchain_isl,KangDroidSMProject/ISL,jleben/isl,epowers/isl,VanirLLVM/toolchain_isl,evaautomation/isl,PollyLabs/isl,nicolasvasilache/isl,pierrotdelalune/isl,abduld/isl,BobSaget-Mod/libisl