Sema: Simplify simplifyTypeImpl() a bit
Sema: Simplify simplifyTypeImpl() a bit

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