Do not spent a lot of time in GlobalARC opts debug printing basic block numbers in assert builds.
Do not spent a lot of time in GlobalARC opts debug printing basic block numbers
in assert builds.

We only need these strings if we compile with -debug-only. Guard their
computation by DEBUG macros.

Swift SVN r32884

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