Add an IRBuilder::CreateBitCast variant which maps addresses.
Add an IRBuilder::CreateBitCast variant which maps addresses.

Swift SVN r1898

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