Missed parens.

llvm-svn: 157527
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index 6837d82..90fec6a 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -1991,7 +1991,7 @@
     // The last case block won't fall through into 'NextBlock' if we emit the
     // branches in this order.  See if rearranging a case value would help.
     // We start at the bottom as it's the case with the least weight.
-    for (Case *I = &*CR.Range.second-2, *E = &*CR.Range.first-1; I != E; --I){
+    for (Case *I = &*(CR.Range.second-2), *E = &*CR.Range.first-1; I != E; --I){
       if (I->BB == NextBlock) {
         std::swap(*I, BackCase);
         break;