diff --git a/lib/CodeGen/MachineCSE.cpp b/lib/CodeGen/MachineCSE.cpp
index 60ad46a0d3b..07a7d27b019 100644
--- a/lib/CodeGen/MachineCSE.cpp
+++ b/lib/CodeGen/MachineCSE.cpp
@@ -284,14 +284,13 @@ bool MachineCSE::isProfitableToCSE(unsigned CSReg, unsigned Reg,
                                    MachineInstr *CSMI, MachineInstr *MI) {
   // FIXME: Heuristics that works around the lack the live range splitting.
 
-  // Heuristics #1: Don't cse "cheap" computating if the def is not local or in an
-  // immediate predecessor. We don't want to increase register pressure and end up
-  // causing other computation to be spilled.
+  // Heuristics #1: Don't CSE "cheap" computation if the def is not local or in
+  // an immediate predecessor. We don't want to increase register pressure and
+  // end up causing other computation to be spilled.
   if (MI->getDesc().isAsCheapAsAMove()) {
     MachineBasicBlock *CSBB = CSMI->getParent();
     MachineBasicBlock *BB = MI->getParent();
-    if (CSBB != BB && 
-        find(CSBB->succ_begin(), CSBB->succ_end(), BB) == CSBB->succ_end())
+    if (CSBB != BB && !CSBB->isSuccessor(BB))
       return false;
   }