Revert "NewGVN: Don't propagate over phi backedges where undef causes us to have >1 value."
It's not ready yet this was an accidental commit :(

This reverts r299903

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@299904 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed