Revise cleanup IR generation to fix a major bug with cleanups (PR7686)
as well as some significant asymptotic inefficiencies with threading
multiple jumps through deep cleanups.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@109274 91177308-0d34-0410-b5e6-96231b3b80d8
11 files changed