Add another missing cast for Neon vcombine results.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120639 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/NeonEmitter.cpp b/utils/TableGen/NeonEmitter.cpp
index 651802a..56e7e18 100644
--- a/utils/TableGen/NeonEmitter.cpp
+++ b/utils/TableGen/NeonEmitter.cpp
@@ -597,7 +597,7 @@
     s += "(" + ts + ")a";
     break;
   case OpConcat:
-    s += "__builtin_shufflevector((int64x1_t)a";
+    s += "(" + ts + ")__builtin_shufflevector((int64x1_t)a";
     s += ", (int64x1_t)b, 0, 1)";
     break;
   case OpHi: