diff --git a/llvm/lib/CodeGen/BasicBlockSections.cpp b/llvm/lib/CodeGen/BasicBlockSections.cpp
index 9b985f9f0aff66c9980843f0ad980f5402ca0927..6e58c8fb294646e7c9ef253ee2e03ab954c41795 100644
--- a/llvm/lib/CodeGen/BasicBlockSections.cpp
+++ b/llvm/lib/CodeGen/BasicBlockSections.cpp
@@ -319,7 +319,8 @@ void computeBBHash(MachineFunction &MF) {
         }
       }
     }
-    MBB.setHash(Hash);
+    if(MBB.getBBID())
+      MBB.setHash(Hash);
   }
 }