isl_basic_map_foreach_constraint: make sure input has been finalized
isl_basic_map_foreach_constraint: make sure input has been finalized

Each constraint gets a copy of the input and a line from the constraint
matrix of the input.  If the input wouldn't be finalized, then the copy
would create a duplicate and then the line wouldn't match the basic map.
This is problematic for especially isl_constraint_is_equality.

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