SDISel's constant branch folding can fold away self-loops, which doesn't result in any dead blocks, but
rather an incorrect phi input.  Add code to UnreachableMachineBlockElim to get rid of these entries.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54432 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed