[loop-arc] Refactor computation of ARCMatchingSet into the MatchingSetComputationContexts.
[loop-arc] Refactor computation of ARCMatchingSet into the MatchingSetComputationContexts.

rdar://22238658

Swift SVN r32859

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