Revert "[Dominators] Teach IDF to use level information"

This reverts commit r306894.

Revert "[Dominators] Add NearestCommonDominator verification"

This reverts commit r306893.

Revert "[Dominators] Keep tree level in DomTreeNode and use it to find NCD and answer dominance queries"

This reverts commit r306892.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@306907 91177308-0d34-0410-b5e6-96231b3b80d8
5 files changed