rearrange code to put simple case + early exit first, NFC.
rearrange code to put simple case + early exit first, NFC.


Swift SVN r24231

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