isl_schedule.c: simplify computation of number of constraints
isl_schedule.c: simplify computation of number of constraints

Instead of telling count_constraints how many times it should
count any given constraint, we now tell it whether we want to
compute the number of constraints for the main LP or for the
carrying LP.

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

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