[IRGenSIL] Break up and simplify liverange extension logic, NFC
[IRGenSIL] Break up and simplify liverange extension logic, NFC

Split out the logic to emit lifetime-extending inline assembly gadgets
into emitLifetimeExtendingUse().

amraboelela/swift,shahmishal/swift,lorentey/swift,xedin/swift,danielmartin/swift,jopamer/swift,aschwaighofer/swift,shajrawi/swift,parkera/swift,hooman/swift,tkremenek/swift,austinzheng/swift,tjw/swift,apple/swift,alblue/swift,atrick/swift,xedin/swift,natecook1000/swift,austinzheng/swift,tkremenek/swift,allevato/swift,amraboelela/swift,xedin/swift,lorentey/swift,austinzheng/swift,shajrawi/swift,jckarter/swift,jopamer/swift,harlanhaskins/swift,rudkx/swift,benlangmuir/swift,xwu/swift,devincoughlin/swift,gribozavr/swift,nathawes/swift,amraboelela/swift,lorentey/swift,huonw/swift,shajrawi/swift,danielmartin/swift,xwu/swift,devincoughlin/swift,glessard/swift,parkera/swift,hooman/swift,danielmartin/swift,sschiau/swift,glessard/swift,hooman/swift,shajrawi/swift,natecook1000/swift,gregomni/swift,nathawes/swift,amraboelela/swift,practicalswift/swift,nathawes/swift,ahoppen/swift,tjw/swift,danielmartin/swift,shajrawi/swift,harlanhaskins/swift,stephentyrone/swift,gribozavr/swift,jckarter/swift,glessard/swift,ahoppen/swift,xwu/swift,practicalswift/swift,shahmishal/swift,airspeedswift/swift,parkera/swift,huonw/swift,gribozavr/swift,lorentey/swift,danielmartin/swift,apple/swift,stephentyrone/swift,JGiola/swift,airspeedswift/swift,brentdax/swift,glessard/swift,stephentyrone/swift,sschiau/swift,karwa/swift,alblue/swift,nathawes/swift,devincoughlin/swift,austinzheng/swift,tjw/swift,harlanhaskins/swift,glessard/swift,roambotics/swift,parkera/swift,tkremenek/swift,natecook1000/swift,alblue/swift,apple/swift,allevato/swift,roambotics/swift,aschwaighofer/swift,jckarter/swift,parkera/swift,gribozavr/swift,tjw/swift,natecook1000/swift,ahoppen/swift,xedin/swift,jopamer/swift,gregomni/swift,tkremenek/swift,sschiau/swift,gribozavr/swift,aschwaighofer/swift,xwu/swift,lorentey/swift,sschiau/swift,CodaFi/swift,jopamer/swift,atrick/swift,jckarter/swift,aschwaighofer/swift,jmgc/swift,huonw/swift,natecook1000/swift,tjw/swift,brentdax/swift,karwa/swift,JGiola/swift,rudkx/swift,austinzheng/swift,tkremenek/swift,devincoughlin/swift,harlanhaskins/swift,sschiau/swift,xwu/swift,jmgc/swift,tkremenek/swift,airspeedswift/swift,airspeedswift/swift,harlanhaskins/swift,benlangmuir/swift,devincoughlin/swift,nathawes/swift,CodaFi/swift,austinzheng/swift,roambotics/swift,xwu/swift,apple/swift,jckarter/swift,allevato/swift,ahoppen/swift,hooman/swift,brentdax/swift,benlangmuir/swift,brentdax/swift,CodaFi/swift,gribozavr/swift,parkera/swift,jopamer/swift,benlangmuir/swift,parkera/swift,atrick/swift,rudkx/swift,shahmishal/swift,gregomni/swift,gregomni/swift,sschiau/swift,xedin/swift,tkremenek/swift,huonw/swift,practicalswift/swift,brentdax/swift,jmgc/swift,JGiola/swift,xedin/swift,lorentey/swift,parkera/swift,shahmishal/swift,rudkx/swift,jmgc/swift,benlangmuir/swift,xedin/swift,gregomni/swift,practicalswift/swift,natecook1000/swift,atrick/swift,jmgc/swift,amraboelela/swift,airspeedswift/swift,shajrawi/swift,karwa/swift,lorentey/swift,ahoppen/swift,stephentyrone/swift,huonw/swift,JGiola/swift,karwa/swift,jmgc/swift,gribozavr/swift,allevato/swift,allevato/swift,alblue/swift,shajrawi/swift,aschwaighofer/swift,practicalswift/swift,nathawes/swift,gribozavr/swift,CodaFi/swift,allevato/swift,atrick/swift,devincoughlin/swift,practicalswift/swift,shahmishal/swift,xedin/swift,xwu/swift,tjw/swift,practicalswift/swift,apple/swift,gregomni/swift,aschwaighofer/swift,stephentyrone/swift,roambotics/swift,karwa/swift,apple/swift,rudkx/swift,jopamer/swift,atrick/swift,benlangmuir/swift,alblue/swift,alblue/swift,austinzheng/swift,harlanhaskins/swift,alblue/swift,roambotics/swift,brentdax/swift,airspeedswift/swift,airspeedswift/swift,hooman/swift,karwa/swift,stephentyrone/swift,glessard/swift,CodaFi/swift,danielmartin/swift,tjw/swift,nathawes/swift,CodaFi/swift,stephentyrone/swift,JGiola/swift,amraboelela/swift,jopamer/swift,JGiola/swift,harlanhaskins/swift,shajrawi/swift,shahmishal/swift,huonw/swift,natecook1000/swift,huonw/swift,ahoppen/swift,hooman/swift,jckarter/swift,sschiau/swift,CodaFi/swift,devincoughlin/swift,karwa/swift,lorentey/swift,sschiau/swift,jckarter/swift,shahmishal/swift,allevato/swift,karwa/swift,shahmishal/swift,jmgc/swift,brentdax/swift,rudkx/swift,devincoughlin/swift,danielmartin/swift,amraboelela/swift,roambotics/swift,aschwaighofer/swift,hooman/swift,practicalswift/swift