[AST] Use getExtendedProtocolDecl() to check for protocol extension and use getDeclaredInterfaceType() instead of getSelfTypeInContext() - both are cheaper
[AST] Use getExtendedProtocolDecl() to check for protocol extension and use getDeclaredInterfaceType() instead of getSelfTypeInContext() - both are cheaper

atrick/swift,hooman/swift,JGiola/swift,jmgc/swift,nathawes/swift,tkremenek/swift,jmgc/swift,stephentyrone/swift,devincoughlin/swift,aschwaighofer/swift,gregomni/swift,CodaFi/swift,apple/swift,parkera/swift,jckarter/swift,roambotics/swift,aschwaighofer/swift,parkera/swift,hooman/swift,airspeedswift/swift,gribozavr/swift,airspeedswift/swift,hooman/swift,lorentey/swift,stephentyrone/swift,CodaFi/swift,hooman/swift,ahoppen/swift,devincoughlin/swift,airspeedswift/swift,allevato/swift,aschwaighofer/swift,jckarter/swift,JGiola/swift,apple/swift,glessard/swift,nathawes/swift,jmgc/swift,stephentyrone/swift,jckarter/swift,allevato/swift,harlanhaskins/swift,apple/swift,airspeedswift/swift,gregomni/swift,gribozavr/swift,rudkx/swift,JGiola/swift,devincoughlin/swift,benlangmuir/swift,xwu/swift,gregomni/swift,xwu/swift,jmgc/swift,xwu/swift,glessard/swift,nathawes/swift,aschwaighofer/swift,CodaFi/swift,benlangmuir/swift,parkera/swift,gribozavr/swift,xwu/swift,devincoughlin/swift,CodaFi/swift,tkremenek/swift,atrick/swift,karwa/swift,apple/swift,gregomni/swift,JGiola/swift,aschwaighofer/swift,lorentey/swift,glessard/swift,benlangmuir/swift,allevato/swift,karwa/swift,benlangmuir/swift,gregomni/swift,nathawes/swift,harlanhaskins/swift,gribozavr/swift,lorentey/swift,karwa/swift,gregomni/swift,atrick/swift,jckarter/swift,tkremenek/swift,glessard/swift,jmgc/swift,harlanhaskins/swift,lorentey/swift,roambotics/swift,tkremenek/swift,parkera/swift,stephentyrone/swift,allevato/swift,atrick/swift,jckarter/swift,stephentyrone/swift,glessard/swift,rudkx/swift,aschwaighofer/swift,airspeedswift/swift,gribozavr/swift,nathawes/swift,glessard/swift,hooman/swift,lorentey/swift,allevato/swift,hooman/swift,jckarter/swift,devincoughlin/swift,rudkx/swift,ahoppen/swift,stephentyrone/swift,xwu/swift,CodaFi/swift,lorentey/swift,CodaFi/swift,rudkx/swift,jckarter/swift,harlanhaskins/swift,benlangmuir/swift,karwa/swift,rudkx/swift,hooman/swift,karwa/swift,harlanhaskins/swift,apple/swift,atrick/swift,harlanhaskins/swift,karwa/swift,tkremenek/swift,allevato/swift,tkremenek/swift,aschwaighofer/swift,xwu/swift,CodaFi/swift,atrick/swift,jmgc/swift,parkera/swift,gribozavr/swift,tkremenek/swift,apple/swift,karwa/swift,jmgc/swift,karwa/swift,roambotics/swift,ahoppen/swift,JGiola/swift,nathawes/swift,parkera/swift,benlangmuir/swift,JGiola/swift,devincoughlin/swift,gribozavr/swift,lorentey/swift,stephentyrone/swift,harlanhaskins/swift,parkera/swift,devincoughlin/swift,rudkx/swift,roambotics/swift,ahoppen/swift,nathawes/swift,devincoughlin/swift,roambotics/swift,lorentey/swift,xwu/swift,airspeedswift/swift,ahoppen/swift,airspeedswift/swift,ahoppen/swift,allevato/swift,gribozavr/swift,roambotics/swift,parkera/swift