[SSADestroyHoisting] Modifying ignores deinit barriers.
[SSADestroyHoisting] Modifying ignores deinit barriers.

Restructured its DeinitBarrier's type a bit to avoid having to pass
KnownStorageUses and ignoreDeinitBarriers around too much.

roambotics/swift,apple/swift,glessard/swift,apple/swift,roambotics/swift,roambotics/swift,glessard/swift,rudkx/swift,benlangmuir/swift,ahoppen/swift,atrick/swift,benlangmuir/swift,JGiola/swift,gregomni/swift,apple/swift,rudkx/swift,atrick/swift,rudkx/swift,rudkx/swift,gregomni/swift,benlangmuir/swift,atrick/swift,roambotics/swift,gregomni/swift,atrick/swift,benlangmuir/swift,glessard/swift,atrick/swift,ahoppen/swift,JGiola/swift,glessard/swift,rudkx/swift,apple/swift,roambotics/swift,roambotics/swift,benlangmuir/swift,gregomni/swift,JGiola/swift,atrick/swift,JGiola/swift,ahoppen/swift,apple/swift,gregomni/swift,glessard/swift,apple/swift,ahoppen/swift,glessard/swift,JGiola/swift,JGiola/swift,ahoppen/swift,benlangmuir/swift,rudkx/swift,gregomni/swift,ahoppen/swift