Index: lib/CodeGen/MachineBlockPlacement.cpp
===================================================================
--- lib/CodeGen/MachineBlockPlacement.cpp
+++ lib/CodeGen/MachineBlockPlacement.cpp
@@ -1583,11 +1583,7 @@
     assert(MBB->isEHPad() == IsEHPad &&
            "EHPad mismatch between block and work list.");
 
-    BlockChain &SuccChain = *BlockToChain[MBB];
-    if (&SuccChain == &Chain)
-      continue;
-
-    assert(SuccChain.UnscheduledPredecessors == 0 &&
+    assert(BlockToChain[MBB]->UnscheduledPredecessors == 0 &&
            "Found CFG-violating block");
 
     BlockFrequency CandidateFreq = MBFI->getBlockFreq(MBB);