[sil-aa] Add test to show that two different alloc_stack and anything for which they are the "underlying object" can not alias.
[sil-aa] Add test to show that two different alloc_stack and anything for which they are the "underlying object" can not alias.

Swift SVN r13614

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