Make helper static.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128338 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index fdf8b9a..7d301e5 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -3891,8 +3891,8 @@
 
 /// getShuffleScalarElt - Returns the scalar element that will make up the ith
 /// element of the result of the vector shuffle.
-SDValue getShuffleScalarElt(SDNode *N, int Index, SelectionDAG &DAG,
-                            unsigned Depth) {
+static SDValue getShuffleScalarElt(SDNode *N, int Index, SelectionDAG &DAG,
+                                   unsigned Depth) {
   if (Depth == 6)
     return SDValue();  // Limit search depth.