Fix a serious bug that caused any x86 vector stuff to infinite loop

llvm-svn: 31254
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index 6b1a1e1..e2f8e99 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -331,7 +331,7 @@
                           SDOperand Op1, SDOperand Op2, SDOperand Op3) {
   AddNodeIDOpcode(ID, OpC);
   AddNodeIDValueTypes(ID, VTList);
-  AddNodeIDOperands(ID, Op1, Op2);
+  AddNodeIDOperands(ID, Op1, Op2, Op3);
 }
 static void AddNodeIDNode(FoldingSetNodeID &ID,
                           unsigned short OpC, SDVTList VTList,