fix a build issue with non-apple-gcc-4.0 compilers.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@44844 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/CodeGen/CGBuiltin.cpp b/CodeGen/CGBuiltin.cpp
index 8f07910..1bf5410 100644
--- a/CodeGen/CGBuiltin.cpp
+++ b/CodeGen/CGBuiltin.cpp
@@ -216,9 +216,10 @@
     return Builder.CreateAnd(EmitScalarExpr(E->getArg(0)),
                              EmitScalarExpr(E->getArg(1)),
                              "pxor");
-  case X86::BI__builtin_ia32_pandn:
+  case X86::BI__builtin_ia32_pandn: {
     llvm::Value *V1 = Builder.CreateNot(EmitScalarExpr(E->getArg(0)), "tmp");
     return Builder.CreateAnd(V1, EmitScalarExpr(E->getArg(1)), "pandn");
+  }
   case X86::BI__builtin_ia32_paddb:
   case X86::BI__builtin_ia32_paddd:
   case X86::BI__builtin_ia32_paddq: