IRGen: Fragile layout of resiliently-typed class fields
IRGen: Fragile layout of resiliently-typed class fields

Fixes <rdar://problem/38506059>.

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