[NewGVN] Replace predicate info leftovers.

This time with an additional fix, i.e. we remove the dead
@llvm.ssa.copy instruction.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@303385 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed