[Mangler] Accelerate the decoding of characters from APInt.
[Mangler] Accelerate the decoding of characters from APInt.

Instead of dividing the number character by character we now extract 8
characters at once into a local 64bit variable and process this variable
locally. It is much faster to process a local variable because unlike APInt
we don't need to shift lots of words around or perform long division.

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