further improve classification: coming out of silgen, we don't know if anything is a proper reassignment: we only know that it could be either InitOrAssign or Init.  Classify stores as such, and then have DI classify things into Assign when it is clearly an overwrite.  This allows later iterations to avoid reanalyzing generated instructions and allows more precise reasoning about ambiguous initializations.
further improve classification: coming out of silgen, we don't know if
anything is a proper reassignment: we only know that it could be either
InitOrAssign or Init.  Classify stores as such, and then have DI classify
things into Assign when it is clearly an overwrite.  This allows later
iterations to avoid reanalyzing generated instructions and allows more
precise reasoning about ambiguous initializations.



Swift SVN r10683

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