isl_bound: accept folds as input
isl_bound: accept folds as input

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

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