Fix warning in no-asserts build.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106405 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 6bdb22e..d99481c 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -6618,6 +6618,7 @@
             SDNode *NewBR =
               DAG.UpdateNodeOperands(User, User->getOperand(0), Dest);
             assert(NewBR == User);
+            (void)NewBR;
             Dest = FalseBB;
 
             Chain = DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),