IRGen: Make (non-functional) FixedTypeInfos for address-only unions.
IRGen: Make (non-functional) FixedTypeInfos for address-only unions.

Stub out a FixedUnionTypeInfo class and teach the UnionImplStrategy classes how to create them when needed.

Swift SVN r7667

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