SIL.rst: Briefly discuss the cdecl and objc conventions.
SIL.rst: Briefly discuss the cdecl and objc conventions.

C types are always trivial and C function signatures don't get mangled by the platform ABI at the SIL level. ObjC methods uncurry left-to-right, "_cmd" is magicked away, and they follow ARC's ownership rules for reference counting.

Swift SVN r6619

tkremenek/swift,MukeshKumarS/Swift,sschiau/swift,felix91gr/swift,therealbnut/swift,shahmishal/swift,brentdax/swift,khizkhiz/swift,shahmishal/swift,zisko/swift,lorentey/swift,parkera/swift,xedin/swift,hooman/swift,huonw/swift,airspeedswift/swift,jmgc/swift,amraboelela/swift,kentya6/swift,gmilos/swift,JaSpa/swift,kperryua/swift,IngmarStein/swift,LeoShimonaka/swift,kusl/swift,lorentey/swift,rudkx/swift,apple/swift,kstaring/swift,KrishMunot/swift,tinysun212/swift-windows,manavgabhawala/swift,shahmishal/swift,xwu/swift,ahoppen/swift,shajrawi/swift,brentdax/swift,JGiola/swift,dreamsxin/swift,adrfer/swift,swiftix/swift.old,tinysun212/swift-windows,danielmartin/swift,Ivacker/swift,KrishMunot/swift,SwiftAndroid/swift,ahoppen/swift,hooman/swift,nathawes/swift,airspeedswift/swift,tardieu/swift,hughbe/swift,gribozavr/swift,atrick/swift,karwa/swift,uasys/swift,felix91gr/swift,frootloops/swift,roambotics/swift,practicalswift/swift,return/swift,jckarter/swift,dreamsxin/swift,CodaFi/swift,roambotics/swift,MukeshKumarS/Swift,austinzheng/swift,airspeedswift/swift,milseman/swift,glessard/swift,JaSpa/swift,hooman/swift,kentya6/swift,hooman/swift,cbrentharris/swift,ken0nek/swift,JGiola/swift,atrick/swift,JGiola/swift,johnno1962d/swift,milseman/swift,shahmishal/swift,OscarSwanros/swift,IngmarStein/swift,bitjammer/swift,swiftix/swift.old,allevato/swift,danielmartin/swift,MukeshKumarS/Swift,rudkx/swift,gregomni/swift,amraboelela/swift,johnno1962d/swift,huonw/swift,return/swift,bitjammer/swift,calebd/swift,ben-ng/swift,nathawes/swift,ben-ng/swift,harlanhaskins/swift,hooman/swift,alblue/swift,Jnosh/swift,dduan/swift,CodaFi/swift,dduan/swift,kstaring/swift,karwa/swift,deyton/swift,deyton/swift,ahoppen/swift,adrfer/swift,modocache/swift,emilstahl/swift,gregomni/swift,russbishop/swift,arvedviehweger/swift,apple/swift,xedin/swift,cbrentharris/swift,russbishop/swift,IngmarStein/swift,glessard/swift,tinysun212/swift-windows,brentdax/swift,roambotics/swift,roambotics/swift,tinysun212/swift-windows,kusl/swift,CodaFi/swift,lorentey/swift,mightydeveloper/swift,alblue/swift,tkremenek/swift,tkremenek/swift,SwiftAndroid/swift,airspeedswift/swift,allevato/swift,emilstahl/swift,kperryua/swift,shahmishal/swift,nathawes/swift,tkremenek/swift,parkera/swift,apple/swift,cbrentharris/swift,amraboelela/swift,codestergit/swift,harlanhaskins/swift,kusl/swift,jtbandes/swift,benlangmuir/swift,danielmartin/swift,karwa/swift,parkera/swift,kperryua/swift,hughbe/swift,jmgc/swift,frootloops/swift,tinysun212/swift-windows,amraboelela/swift,huonw/swift,uasys/swift,danielmartin/swift,xwu/swift,austinzheng/swift,harlanhaskins/swift,glessard/swift,mightydeveloper/swift,SwiftAndroid/swift,russbishop/swift,CodaFi/swift,gottesmm/swift,zisko/swift,uasys/swift,ahoppen/swift,Ivacker/swift,brentdax/swift,sschiau/swift,return/swift,emilstahl/swift,CodaFi/swift,sdulal/swift,modocache/swift,tardieu/swift,natecook1000/swift,ben-ng/swift,modocache/swift,sdulal/swift,djwbrown/swift,alblue/swift,devincoughlin/swift,austinzheng/swift,arvedviehweger/swift,jckarter/swift,djwbrown/swift,sschiau/swift,hughbe/swift,JGiola/swift,sschiau/swift,apple/swift,huonw/swift,slavapestov/swift,mightydeveloper/swift,manavgabhawala/swift,therealbnut/swift,devincoughlin/swift,russbishop/swift,tjw/swift,xedin/swift,cbrentharris/swift,zisko/swift,khizkhiz/swift,xedin/swift,sdulal/swift,stephentyrone/swift,felix91gr/swift,swiftix/swift,aschwaighofer/swift,uasys/swift,IngmarStein/swift,atrick/swift,sschiau/swift,Jnosh/swift,arvedviehweger/swift,LeoShimonaka/swift,manavgabhawala/swift,apple/swift,jtbandes/swift,johnno1962d/swift,shajrawi/swift,dduan/swift,hooman/swift,arvedviehweger/swift,airspeedswift/swift,jckarter/swift,rudkx/swift,emilstahl/swift,ben-ng/swift,brentdax/swift,jtbandes/swift,parkera/swift,lorentey/swift,tardieu/swift,gottesmm/swift,ken0nek/swift,benlangmuir/swift,kperryua/swift,KrishMunot/swift,shajrawi/swift,shajrawi/swift,felix91gr/swift,stephentyrone/swift,swiftix/swift.old,jmgc/swift,devincoughlin/swift,xedin/swift,Ivacker/swift,LeoShimonaka/swift,OscarSwanros/swift,practicalswift/swift,slavapestov/swift,karwa/swift,ken0nek/swift,JGiola/swift,hooman/swift,roambotics/swift,deyton/swift,airspeedswift/swift,khizkhiz/swift,xwu/swift,ken0nek/swift,austinzheng/swift,huonw/swift,benlangmuir/swift,gmilos/swift,tardieu/swift,uasys/swift,stephentyrone/swift,gregomni/swift,practicalswift/swift,therealbnut/swift,calebd/swift,zisko/swift,therealbnut/swift,roambotics/swift,cbrentharris/swift,sdulal/swift,deyton/swift,nathawes/swift,KrishMunot/swift,jopamer/swift,tjw/swift,shajrawi/swift,brentdax/swift,atrick/swift,Jnosh/swift,jtbandes/swift,felix91gr/swift,gottesmm/swift,swiftix/swift,IngmarStein/swift,practicalswift/swift,MukeshKumarS/Swift,shajrawi/swift,huonw/swift,atrick/swift,xedin/swift,mightydeveloper/swift,JaSpa/swift,practicalswift/swift,emilstahl/swift,swiftix/swift,mightydeveloper/swift,frootloops/swift,alblue/swift,felix91gr/swift,jmgc/swift,manavgabhawala/swift,frootloops/swift,shahmishal/swift,aschwaighofer/swift,LeoShimonaka/swift,codestergit/swift,therealbnut/swift,Jnosh/swift,gmilos/swift,kstaring/swift,stephentyrone/swift,harlanhaskins/swift,slavapestov/swift,milseman/swift,tardieu/swift,jopamer/swift,xwu/swift,nathawes/swift,kentya6/swift,gmilos/swift,return/swift,KrishMunot/swift,xwu/swift,jtbandes/swift,natecook1000/swift,SwiftAndroid/swift,gregomni/swift,JaSpa/swift,rudkx/swift,swiftix/swift,mightydeveloper/swift,practicalswift/swift,nathawes/swift,natecook1000/swift,gmilos/swift,cbrentharris/swift,austinzheng/swift,shahmishal/swift,jmgc/swift,hughbe/swift,gribozavr/swift,practicalswift/swift,jckarter/swift,tinysun212/swift-windows,zisko/swift,shajrawi/swift,return/swift,codestergit/swift,swiftix/swift.old,MukeshKumarS/Swift,gribozavr/swift,zisko/swift,manavgabhawala/swift,tjw/swift,jopamer/swift,harlanhaskins/swift,slavapestov/swift,ken0nek/swift,natecook1000/swift,Ivacker/swift,shahmishal/swift,Ivacker/swift,Jnosh/swift,CodaFi/swift,stephentyrone/swift,swiftix/swift.old,therealbnut/swift,stephentyrone/swift,johnno1962d/swift,khizkhiz/swift,apple/swift,swiftix/swift.old,allevato/swift,amraboelela/swift,cbrentharris/swift,allevato/swift,aschwaighofer/swift,milseman/swift,hughbe/swift,SwiftAndroid/swift,djwbrown/swift,amraboelela/swift,devincoughlin/swift,jopamer/swift,natecook1000/swift,jckarter/swift,swiftix/swift.old,IngmarStein/swift,aschwaighofer/swift,LeoShimonaka/swift,jopamer/swift,tardieu/swift,adrfer/swift,jckarter/swift,SwiftAndroid/swift,karwa/swift,khizkhiz/swift,sschiau/swift,tjw/swift,Jnosh/swift,tjw/swift,parkera/swift,slavapestov/swift,sdulal/swift,LeoShimonaka/swift,tardieu/swift,parkera/swift,IngmarStein/swift,benlangmuir/swift,gottesmm/swift,gottesmm/swift,deyton/swift,tkremenek/swift,gmilos/swift,swiftix/swift,gottesmm/swift,jtbandes/swift,kperryua/swift,nathawes/swift,kusl/swift,return/swift,jopamer/swift,amraboelela/swift,russbishop/swift,kentya6/swift,kstaring/swift,kentya6/swift,xwu/swift,kstaring/swift,austinzheng/swift,danielmartin/swift,glessard/swift,mightydeveloper/swift,JGiola/swift,lorentey/swift,gmilos/swift,bitjammer/swift,lorentey/swift,khizkhiz/swift,bitjammer/swift,frootloops/swift,johnno1962d/swift,adrfer/swift,benlangmuir/swift,felix91gr/swift,bitjammer/swift,kentya6/swift,djwbrown/swift,calebd/swift,russbishop/swift,shajrawi/swift,slavapestov/swift,KrishMunot/swift,karwa/swift,devincoughlin/swift,sdulal/swift,benlangmuir/swift,arvedviehweger/swift,CodaFi/swift,OscarSwanros/swift,gribozavr/swift,JaSpa/swift,gribozavr/swift,glessard/swift,aschwaighofer/swift,emilstahl/swift,swiftix/swift.old,adrfer/swift,OscarSwanros/swift,uasys/swift,gribozavr/swift,alblue/swift,allevato/swift,parkera/swift,kusl/swift,austinzheng/swift,danielmartin/swift,kperryua/swift,calebd/swift,dduan/swift,bitjammer/swift,lorentey/swift,glessard/swift,karwa/swift,dduan/swift,ahoppen/swift,codestergit/swift,ahoppen/swift,kentya6/swift,adrfer/swift,deyton/swift,hughbe/swift,djwbrown/swift,atrick/swift,kusl/swift,danielmartin/swift,aschwaighofer/swift,OscarSwanros/swift,stephentyrone/swift,gribozavr/swift,kusl/swift,swiftix/swift,modocache/swift,aschwaighofer/swift,frootloops/swift,xedin/swift,sdulal/swift,johnno1962d/swift,sschiau/swift,modocache/swift,adrfer/swift,return/swift,lorentey/swift,xedin/swift,alblue/swift,tkremenek/swift,arvedviehweger/swift,natecook1000/swift,ken0nek/swift,calebd/swift,ben-ng/swift,devincoughlin/swift,modocache/swift,khizkhiz/swift,arvedviehweger/swift,alblue/swift,MukeshKumarS/Swift,KrishMunot/swift,ken0nek/swift,LeoShimonaka/swift,devincoughlin/swift,deyton/swift,parkera/swift,rudkx/swift,gregomni/swift,OscarSwanros/swift,calebd/swift,mightydeveloper/swift,milseman/swift,milseman/swift,tinysun212/swift-windows,tjw/swift,codestergit/swift,devincoughlin/swift,kperryua/swift,dduan/swift,slavapestov/swift,kstaring/swift,djwbrown/swift,kstaring/swift,calebd/swift,emilstahl/swift,gregomni/swift,manavgabhawala/swift,russbishop/swift,ben-ng/swift,cbrentharris/swift,Ivacker/swift,JaSpa/swift,codestergit/swift,kentya6/swift,therealbnut/swift,Ivacker/swift,allevato/swift,modocache/swift,bitjammer/swift,tjw/swift,uasys/swift,johnno1962d/swift,manavgabhawala/swift,jtbandes/swift,airspeedswift/swift,harlanhaskins/swift,Jnosh/swift,allevato/swift,jmgc/swift,frootloops/swift,kusl/swift,milseman/swift,djwbrown/swift,brentdax/swift,codestergit/swift,jckarter/swift,jmgc/swift,JaSpa/swift,tkremenek/swift,xwu/swift,zisko/swift,hughbe/swift,Ivacker/swift,emilstahl/swift,MukeshKumarS/Swift,dduan/swift,harlanhaskins/swift,natecook1000/swift,SwiftAndroid/swift,huonw/swift,rudkx/swift,practicalswift/swift,ben-ng/swift,sschiau/swift,swiftix/swift,jopamer/swift,gottesmm/swift,OscarSwanros/swift,LeoShimonaka/swift,sdulal/swift,gribozavr/swift,karwa/swift