Move shared data members from ConstraintSystem into a separate pointer.
Move shared data members from ConstraintSystem into a separate pointer.

This both makes ConstraintSystems smaller and eliminates
pointer-hopping to get up to the top constraint system in common
cases, for a 3% speedup.


Swift SVN r3156

LeoShimonaka/swift,sschiau/swift,kentya6/swift,KrishMunot/swift,SwiftAndroid/swift,tardieu/swift,roambotics/swift,manavgabhawala/swift,harlanhaskins/swift,khizkhiz/swift,austinzheng/swift,KrishMunot/swift,mightydeveloper/swift,practicalswift/swift,Jnosh/swift,swiftix/swift.old,ben-ng/swift,nathawes/swift,karwa/swift,calebd/swift,SwiftAndroid/swift,CodaFi/swift,emilstahl/swift,lorentey/swift,manavgabhawala/swift,jckarter/swift,practicalswift/swift,return/swift,khizkhiz/swift,huonw/swift,codestergit/swift,parkera/swift,kentya6/swift,brentdax/swift,cbrentharris/swift,sdulal/swift,atrick/swift,MukeshKumarS/Swift,apple/swift,natecook1000/swift,slavapestov/swift,kusl/swift,johnno1962d/swift,russbishop/swift,austinzheng/swift,swiftix/swift,tardieu/swift,adrfer/swift,tkremenek/swift,CodaFi/swift,uasys/swift,JGiola/swift,swiftix/swift,allevato/swift,xwu/swift,kperryua/swift,xedin/swift,tjw/swift,swiftix/swift,emilstahl/swift,emilstahl/swift,jopamer/swift,adrfer/swift,cbrentharris/swift,lorentey/swift,atrick/swift,felix91gr/swift,Ivacker/swift,felix91gr/swift,MukeshKumarS/Swift,tinysun212/swift-windows,tkremenek/swift,gregomni/swift,cbrentharris/swift,deyton/swift,allevato/swift,jopamer/swift,jmgc/swift,kperryua/swift,johnno1962d/swift,practicalswift/swift,harlanhaskins/swift,felix91gr/swift,MukeshKumarS/Swift,aschwaighofer/swift,IngmarStein/swift,jopamer/swift,therealbnut/swift,stephentyrone/swift,karwa/swift,allevato/swift,xwu/swift,russbishop/swift,djwbrown/swift,JGiola/swift,alblue/swift,devincoughlin/swift,alblue/swift,harlanhaskins/swift,huonw/swift,arvedviehweger/swift,kentya6/swift,hughbe/swift,natecook1000/swift,allevato/swift,zisko/swift,return/swift,danielmartin/swift,modocache/swift,hooman/swift,KrishMunot/swift,gribozavr/swift,shajrawi/swift,slavapestov/swift,zisko/swift,ken0nek/swift,kusl/swift,jopamer/swift,djwbrown/swift,JaSpa/swift,aschwaighofer/swift,danielmartin/swift,emilstahl/swift,codestergit/swift,sdulal/swift,huonw/swift,danielmartin/swift,nathawes/swift,modocache/swift,arvedviehweger/swift,gregomni/swift,jckarter/swift,mightydeveloper/swift,austinzheng/swift,gottesmm/swift,jmgc/swift,airspeedswift/swift,OscarSwanros/swift,jmgc/swift,MukeshKumarS/Swift,parkera/swift,swiftix/swift.old,sschiau/swift,modocache/swift,glessard/swift,shahmishal/swift,sdulal/swift,swiftix/swift.old,lorentey/swift,hughbe/swift,modocache/swift,slavapestov/swift,IngmarStein/swift,bitjammer/swift,jtbandes/swift,jckarter/swift,hughbe/swift,shahmishal/swift,dduan/swift,johnno1962d/swift,glessard/swift,KrishMunot/swift,swiftix/swift.old,parkera/swift,SwiftAndroid/swift,gottesmm/swift,natecook1000/swift,mightydeveloper/swift,KrishMunot/swift,uasys/swift,jckarter/swift,ken0nek/swift,Ivacker/swift,benlangmuir/swift,brentdax/swift,karwa/swift,sdulal/swift,gregomni/swift,kstaring/swift,apple/swift,russbishop/swift,milseman/swift,gribozavr/swift,manavgabhawala/swift,ben-ng/swift,practicalswift/swift,adrfer/swift,gottesmm/swift,ahoppen/swift,tinysun212/swift-windows,OscarSwanros/swift,russbishop/swift,allevato/swift,karwa/swift,codestergit/swift,sdulal/swift,natecook1000/swift,deyton/swift,dduan/swift,bitjammer/swift,JGiola/swift,adrfer/swift,shahmishal/swift,LeoShimonaka/swift,sdulal/swift,harlanhaskins/swift,lorentey/swift,frootloops/swift,hooman/swift,cbrentharris/swift,shajrawi/swift,milseman/swift,aschwaighofer/swift,JaSpa/swift,ben-ng/swift,jtbandes/swift,zisko/swift,apple/swift,slavapestov/swift,danielmartin/swift,airspeedswift/swift,gottesmm/swift,parkera/swift,djwbrown/swift,ben-ng/swift,gregomni/swift,tjw/swift,tjw/swift,jopamer/swift,alblue/swift,allevato/swift,JaSpa/swift,stephentyrone/swift,dduan/swift,ken0nek/swift,gribozavr/swift,aschwaighofer/swift,mightydeveloper/swift,roambotics/swift,kstaring/swift,amraboelela/swift,Jnosh/swift,CodaFi/swift,rudkx/swift,practicalswift/swift,ken0nek/swift,karwa/swift,KrishMunot/swift,emilstahl/swift,Jnosh/swift,therealbnut/swift,calebd/swift,CodaFi/swift,alblue/swift,jmgc/swift,bitjammer/swift,xwu/swift,sdulal/swift,milseman/swift,KrishMunot/swift,JaSpa/swift,russbishop/swift,gmilos/swift,hughbe/swift,SwiftAndroid/swift,cbrentharris/swift,adrfer/swift,xwu/swift,jtbandes/swift,gmilos/swift,zisko/swift,devincoughlin/swift,JGiola/swift,emilstahl/swift,amraboelela/swift,sschiau/swift,apple/swift,austinzheng/swift,apple/swift,zisko/swift,Jnosh/swift,codestergit/swift,manavgabhawala/swift,kusl/swift,arvedviehweger/swift,atrick/swift,Ivacker/swift,harlanhaskins/swift,parkera/swift,IngmarStein/swift,Ivacker/swift,shajrawi/swift,arvedviehweger/swift,mightydeveloper/swift,tkremenek/swift,slavapestov/swift,shajrawi/swift,adrfer/swift,austinzheng/swift,natecook1000/swift,ahoppen/swift,shahmishal/swift,lorentey/swift,SwiftAndroid/swift,djwbrown/swift,huonw/swift,swiftix/swift,roambotics/swift,therealbnut/swift,IngmarStein/swift,xwu/swift,shahmishal/swift,aschwaighofer/swift,nathawes/swift,JaSpa/swift,zisko/swift,jckarter/swift,tinysun212/swift-windows,deyton/swift,stephentyrone/swift,OscarSwanros/swift,parkera/swift,uasys/swift,mightydeveloper/swift,practicalswift/swift,glessard/swift,emilstahl/swift,rudkx/swift,danielmartin/swift,jmgc/swift,lorentey/swift,roambotics/swift,rudkx/swift,airspeedswift/swift,gregomni/swift,brentdax/swift,shajrawi/swift,dreamsxin/swift,jckarter/swift,hooman/swift,djwbrown/swift,parkera/swift,milseman/swift,IngmarStein/swift,xedin/swift,gribozavr/swift,parkera/swift,modocache/swift,CodaFi/swift,kentya6/swift,arvedviehweger/swift,gribozavr/swift,return/swift,harlanhaskins/swift,calebd/swift,swiftix/swift,arvedviehweger/swift,shajrawi/swift,gmilos/swift,tardieu/swift,gottesmm/swift,shahmishal/swift,djwbrown/swift,jtbandes/swift,airspeedswift/swift,gregomni/swift,dduan/swift,IngmarStein/swift,huonw/swift,Ivacker/swift,xwu/swift,hughbe/swift,kusl/swift,manavgabhawala/swift,JaSpa/swift,manavgabhawala/swift,devincoughlin/swift,kusl/swift,khizkhiz/swift,swiftix/swift.old,cbrentharris/swift,devincoughlin/swift,xwu/swift,nathawes/swift,danielmartin/swift,OscarSwanros/swift,kperryua/swift,kusl/swift,tinysun212/swift-windows,codestergit/swift,slavapestov/swift,tjw/swift,airspeedswift/swift,amraboelela/swift,lorentey/swift,xedin/swift,frootloops/swift,tjw/swift,rudkx/swift,tkremenek/swift,tardieu/swift,roambotics/swift,kstaring/swift,xedin/swift,stephentyrone/swift,khizkhiz/swift,johnno1962d/swift,LeoShimonaka/swift,kentya6/swift,amraboelela/swift,LeoShimonaka/swift,kentya6/swift,rudkx/swift,MukeshKumarS/Swift,arvedviehweger/swift,benlangmuir/swift,sschiau/swift,benlangmuir/swift,natecook1000/swift,frootloops/swift,kperryua/swift,calebd/swift,manavgabhawala/swift,jmgc/swift,nathawes/swift,therealbnut/swift,practicalswift/swift,hooman/swift,mightydeveloper/swift,felix91gr/swift,milseman/swift,calebd/swift,sschiau/swift,dreamsxin/swift,cbrentharris/swift,gmilos/swift,frootloops/swift,therealbnut/swift,cbrentharris/swift,ahoppen/swift,tjw/swift,bitjammer/swift,milseman/swift,therealbnut/swift,kperryua/swift,aschwaighofer/swift,gribozavr/swift,modocache/swift,shahmishal/swift,ben-ng/swift,brentdax/swift,ahoppen/swift,alblue/swift,uasys/swift,glessard/swift,frootloops/swift,LeoShimonaka/swift,hughbe/swift,tkremenek/swift,gmilos/swift,benlangmuir/swift,xedin/swift,allevato/swift,ben-ng/swift,kperryua/swift,amraboelela/swift,kentya6/swift,OscarSwanros/swift,kusl/swift,OscarSwanros/swift,kstaring/swift,JaSpa/swift,modocache/swift,Ivacker/swift,kstaring/swift,CodaFi/swift,sschiau/swift,aschwaighofer/swift,shajrawi/swift,JGiola/swift,stephentyrone/swift,johnno1962d/swift,bitjammer/swift,karwa/swift,devincoughlin/swift,amraboelela/swift,sschiau/swift,harlanhaskins/swift,Ivacker/swift,johnno1962d/swift,jopamer/swift,kperryua/swift,tardieu/swift,return/swift,brentdax/swift,karwa/swift,MukeshKumarS/Swift,sschiau/swift,russbishop/swift,return/swift,felix91gr/swift,kusl/swift,tkremenek/swift,swiftix/swift,LeoShimonaka/swift,codestergit/swift,sdulal/swift,tardieu/swift,adrfer/swift,devincoughlin/swift,milseman/swift,khizkhiz/swift,kentya6/swift,shajrawi/swift,atrick/swift,atrick/swift,roambotics/swift,felix91gr/swift,tjw/swift,return/swift,stephentyrone/swift,benlangmuir/swift,zisko/swift,tinysun212/swift-windows,lorentey/swift,rudkx/swift,MukeshKumarS/Swift,airspeedswift/swift,xedin/swift,mightydeveloper/swift,uasys/swift,tinysun212/swift-windows,hooman/swift,uasys/swift,gottesmm/swift,felix91gr/swift,hughbe/swift,ken0nek/swift,frootloops/swift,hooman/swift,tardieu/swift,devincoughlin/swift,gmilos/swift,djwbrown/swift,tkremenek/swift,kstaring/swift,deyton/swift,kstaring/swift,xedin/swift,huonw/swift,jmgc/swift,gribozavr/swift,shahmishal/swift,dduan/swift,calebd/swift,stephentyrone/swift,jtbandes/swift,glessard/swift,gottesmm/swift,amraboelela/swift,hooman/swift,LeoShimonaka/swift,khizkhiz/swift,dduan/swift,SwiftAndroid/swift,ben-ng/swift,glessard/swift,IngmarStein/swift,bitjammer/swift,Jnosh/swift,emilstahl/swift,brentdax/swift,gribozavr/swift,alblue/swift,swiftix/swift.old,nathawes/swift,uasys/swift,karwa/swift,slavapestov/swift,devincoughlin/swift,dduan/swift,natecook1000/swift,jopamer/swift,austinzheng/swift,jtbandes/swift,jtbandes/swift,ahoppen/swift,deyton/swift,xedin/swift,therealbnut/swift,codestergit/swift,calebd/swift,airspeedswift/swift,practicalswift/swift,ken0nek/swift,JGiola/swift,Jnosh/swift,atrick/swift,swiftix/swift,russbishop/swift,swiftix/swift.old,CodaFi/swift,OscarSwanros/swift,apple/swift,khizkhiz/swift,jckarter/swift,Jnosh/swift,return/swift,frootloops/swift,alblue/swift,SwiftAndroid/swift,danielmartin/swift,LeoShimonaka/swift,bitjammer/swift,brentdax/swift,deyton/swift,Ivacker/swift,johnno1962d/swift,tinysun212/swift-windows,swiftix/swift.old,deyton/swift,ken0nek/swift,gmilos/swift,huonw/swift,benlangmuir/swift,nathawes/swift,austinzheng/swift,ahoppen/swift