Revert "Dead Virtual Function Elimination"

This reverts commit 9f6a873268e1ad9855873d9d8007086c0d01cf4f.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@374844 91177308-0d34-0410-b5e6-96231b3b80d8
11 files changed