[RLE-DSE] Use SmallDenseMap instead of DenseMap in DSE to save memory allocations. Many, if not most functions, do not have more than 64 BasicBlocks (BBState)
[RLE-DSE] Use SmallDenseMap instead of DenseMap in DSE to save memory allocations.
Many, if not most functions, do not have more than 64 BasicBlocks (BBState)

Existing tests ensure correctness.

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