Revert 85678/85680.  The decision is to stay with the current form of 
indirectbr, thus we don't need "blockaddr(@func, null)".  Eliminate it
for simplicity.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85699 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/IPO/GlobalOpt.cpp b/lib/Transforms/IPO/GlobalOpt.cpp
index 9495100..49e9683 100644
--- a/lib/Transforms/IPO/GlobalOpt.cpp
+++ b/lib/Transforms/IPO/GlobalOpt.cpp
@@ -2345,7 +2345,8 @@
         Value *Val = getVal(Values, IBI->getAddress())->stripPointerCasts();
         if (BlockAddress *BA = dyn_cast<BlockAddress>(Val))
           NewBB = BA->getBasicBlock();
-        if (NewBB == 0) return false;  // Cannot determine.
+        else
+          return false;  // Cannot determine.
       } else if (ReturnInst *RI = dyn_cast<ReturnInst>(CurInst)) {
         if (RI->getNumOperands())
           RetVal = getVal(Values, RI->getOperand(0));