[global-arc-opts] Separate the increment, decrement matching function from the function that actually removes, moves the increments, decrements.
[global-arc-opts] Separate the increment, decrement matching function from the function that actually removes, moves the increments, decrements.

Now that this is done, I will begin to extract the dataflow
analysis/pairing into an analysis.

<rdar://problem/16965332>

Swift SVN r18480

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