SIL: Verify against upcasts and super_methods to same type.
SIL: Verify against upcasts and super_methods to same type.

These verifier rules will help catch bugs in a similar vein to <rdar://problem/14581294> in the future.

Swift SVN r6721

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