isl_map_is_subset: exploit another easy special case
isl_map_is_subset: exploit another easy special case

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