Remove some of the passes in the optimization pipeline.
Remove some of the passes in the optimization pipeline.

I measured zero performance regressions on the test suite. I added an early
CSE pass because of a specific example in one of the tests where the inliner
brought in an integer literal that needed to be CSE-ed before inst-combine
could fold a comparison into a constant, and simplify-cfg get rid of that
constant.

Representing our literal values as instructions (e.g. integer_literal) forces
us to run CSE constantly. We also need to re-run InstCombine very frequently
because InstSimplifier is not allowed to create new instructions!

Swift SVN r26736

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