Sema: simplifyType() can return early if the type has no variables
Sema: simplifyType() can return early if the type has no variables

This allows calling simplifyType() unconditionally even if we
know we don't have any type variables in the type.

tjw/swift,huonw/swift,gregomni/swift,huonw/swift,calebd/swift,gregomni/swift,karwa/swift,uasys/swift,lorentey/swift,xedin/swift,practicalswift/swift,amraboelela/swift,atrick/swift,tjw/swift,frootloops/swift,karwa/swift,allevato/swift,benlangmuir/swift,lorentey/swift,gribozavr/swift,shahmishal/swift,CodaFi/swift,glessard/swift,milseman/swift,Jnosh/swift,OscarSwanros/swift,uasys/swift,danielmartin/swift,shajrawi/swift,sschiau/swift,devincoughlin/swift,austinzheng/swift,xedin/swift,parkera/swift,devincoughlin/swift,practicalswift/swift,CodaFi/swift,CodaFi/swift,stephentyrone/swift,hooman/swift,arvedviehweger/swift,jopamer/swift,jtbandes/swift,tkremenek/swift,hooman/swift,JGiola/swift,brentdax/swift,deyton/swift,hooman/swift,xedin/swift,swiftix/swift,huonw/swift,jckarter/swift,swiftix/swift,alblue/swift,harlanhaskins/swift,apple/swift,milseman/swift,djwbrown/swift,harlanhaskins/swift,stephentyrone/swift,jopamer/swift,nathawes/swift,sschiau/swift,hughbe/swift,hughbe/swift,austinzheng/swift,atrick/swift,shahmishal/swift,practicalswift/swift,airspeedswift/swift,shahmishal/swift,CodaFi/swift,airspeedswift/swift,xwu/swift,parkera/swift,felix91gr/swift,devincoughlin/swift,jtbandes/swift,hughbe/swift,jmgc/swift,jopamer/swift,lorentey/swift,glessard/swift,xwu/swift,tjw/swift,milseman/swift,sschiau/swift,zisko/swift,arvedviehweger/swift,jckarter/swift,aschwaighofer/swift,felix91gr/swift,zisko/swift,xwu/swift,aschwaighofer/swift,shajrawi/swift,huonw/swift,gribozavr/swift,return/swift,calebd/swift,djwbrown/swift,xedin/swift,xwu/swift,hooman/swift,gregomni/swift,uasys/swift,rudkx/swift,xedin/swift,practicalswift/swift,shahmishal/swift,gribozavr/swift,sschiau/swift,tkremenek/swift,airspeedswift/swift,ahoppen/swift,alblue/swift,devincoughlin/swift,allevato/swift,djwbrown/swift,danielmartin/swift,hooman/swift,brentdax/swift,shahmishal/swift,lorentey/swift,alblue/swift,tjw/swift,amraboelela/swift,shajrawi/swift,OscarSwanros/swift,roambotics/swift,brentdax/swift,jtbandes/swift,atrick/swift,hughbe/swift,benlangmuir/swift,harlanhaskins/swift,CodaFi/swift,benlangmuir/swift,stephentyrone/swift,nathawes/swift,roambotics/swift,sschiau/swift,zisko/swift,djwbrown/swift,uasys/swift,practicalswift/swift,danielmartin/swift,deyton/swift,Jnosh/swift,tjw/swift,danielmartin/swift,djwbrown/swift,roambotics/swift,jtbandes/swift,shahmishal/swift,apple/swift,natecook1000/swift,allevato/swift,airspeedswift/swift,jmgc/swift,roambotics/swift,airspeedswift/swift,nathawes/swift,parkera/swift,calebd/swift,xwu/swift,rudkx/swift,frootloops/swift,benlangmuir/swift,uasys/swift,alblue/swift,stephentyrone/swift,hughbe/swift,harlanhaskins/swift,lorentey/swift,xedin/swift,hooman/swift,uasys/swift,huonw/swift,glessard/swift,felix91gr/swift,swiftix/swift,JGiola/swift,practicalswift/swift,karwa/swift,milseman/swift,rudkx/swift,karwa/swift,frootloops/swift,aschwaighofer/swift,danielmartin/swift,allevato/swift,hughbe/swift,return/swift,natecook1000/swift,airspeedswift/swift,gribozavr/swift,tkremenek/swift,milseman/swift,tjw/swift,rudkx/swift,rudkx/swift,parkera/swift,jtbandes/swift,ahoppen/swift,jckarter/swift,xwu/swift,nathawes/swift,huonw/swift,ahoppen/swift,gregomni/swift,gregomni/swift,jmgc/swift,airspeedswift/swift,djwbrown/swift,swiftix/swift,brentdax/swift,uasys/swift,JGiola/swift,OscarSwanros/swift,devincoughlin/swift,milseman/swift,jopamer/swift,milseman/swift,lorentey/swift,OscarSwanros/swift,austinzheng/swift,xedin/swift,jmgc/swift,aschwaighofer/swift,lorentey/swift,danielmartin/swift,amraboelela/swift,shahmishal/swift,jckarter/swift,JGiola/swift,alblue/swift,natecook1000/swift,swiftix/swift,parkera/swift,devincoughlin/swift,sschiau/swift,karwa/swift,ahoppen/swift,jtbandes/swift,CodaFi/swift,allevato/swift,devincoughlin/swift,calebd/swift,gribozavr/swift,amraboelela/swift,apple/swift,Jnosh/swift,brentdax/swift,arvedviehweger/swift,natecook1000/swift,austinzheng/swift,xwu/swift,austinzheng/swift,frootloops/swift,jopamer/swift,allevato/swift,atrick/swift,deyton/swift,deyton/swift,benlangmuir/swift,jmgc/swift,frootloops/swift,parkera/swift,brentdax/swift,shahmishal/swift,OscarSwanros/swift,karwa/swift,glessard/swift,swiftix/swift,rudkx/swift,return/swift,gregomni/swift,nathawes/swift,zisko/swift,Jnosh/swift,felix91gr/swift,OscarSwanros/swift,deyton/swift,arvedviehweger/swift,amraboelela/swift,gribozavr/swift,karwa/swift,Jnosh/swift,practicalswift/swift,JGiola/swift,tkremenek/swift,lorentey/swift,frootloops/swift,JGiola/swift,calebd/swift,harlanhaskins/swift,jckarter/swift,danielmartin/swift,hughbe/swift,swiftix/swift,tkremenek/swift,Jnosh/swift,austinzheng/swift,natecook1000/swift,aschwaighofer/swift,practicalswift/swift,djwbrown/swift,karwa/swift,nathawes/swift,apple/swift,alblue/swift,aschwaighofer/swift,amraboelela/swift,gribozavr/swift,jmgc/swift,calebd/swift,xedin/swift,zisko/swift,frootloops/swift,jckarter/swift,felix91gr/swift,sschiau/swift,return/swift,jopamer/swift,stephentyrone/swift,return/swift,atrick/swift,roambotics/swift,stephentyrone/swift,glessard/swift,Jnosh/swift,nathawes/swift,arvedviehweger/swift,parkera/swift,arvedviehweger/swift,alblue/swift,deyton/swift,parkera/swift,calebd/swift,hooman/swift,harlanhaskins/swift,natecook1000/swift,roambotics/swift,apple/swift,jtbandes/swift,amraboelela/swift,felix91gr/swift,natecook1000/swift,tkremenek/swift,shajrawi/swift,deyton/swift,CodaFi/swift,jmgc/swift,allevato/swift,zisko/swift,tkremenek/swift,apple/swift,shajrawi/swift,austinzheng/swift,shajrawi/swift,shajrawi/swift,gribozavr/swift,zisko/swift,felix91gr/swift,atrick/swift,return/swift,stephentyrone/swift,glessard/swift,OscarSwanros/swift,return/swift,arvedviehweger/swift,aschwaighofer/swift,jopamer/swift,ahoppen/swift,jckarter/swift,sschiau/swift,huonw/swift,benlangmuir/swift,brentdax/swift,harlanhaskins/swift,tjw/swift,devincoughlin/swift,ahoppen/swift,shajrawi/swift