diff --git a/llvm/lib/CodeGen/MachineBasicBlock.cpp b/llvm/lib/CodeGen/MachineBasicBlock.cpp
--- a/llvm/lib/CodeGen/MachineBasicBlock.cpp
+++ b/llvm/lib/CodeGen/MachineBasicBlock.cpp
@@ -828,7 +828,7 @@
 
 void MachineBasicBlock::copySuccessor(MachineBasicBlock *Orig,
                                       succ_iterator I) {
-  if (Orig->Probs.empty())
+  if (!Orig->Probs.empty())
     addSuccessor(*I, Orig->getSuccProbability(I));
   else
     addSuccessorWithoutProb(*I);