Fix problems in "[OpenCL] Enabling the usage of CLK_NULL_QUEUE as compare operand."

Summary: Fixed warnings in commit: https://reviews.llvm.org/rL290171

Reviewers: djasper, Anastasia

Subscribers: yaxunl, cfe-commits, bader

Differential Revision: https://reviews.llvm.org/D27981

llvm-svn: 290431
diff --git a/clang/lib/CodeGen/CGExpr.cpp b/clang/lib/CodeGen/CGExpr.cpp
index 88a5374..183201c 100644
--- a/clang/lib/CodeGen/CGExpr.cpp
+++ b/clang/lib/CodeGen/CGExpr.cpp
@@ -3781,6 +3781,8 @@
                                              ConvertType(E->getType()));
     return MakeAddrLValue(V, E->getType(), LV.getAlignmentSource());
   }
+  case CK_ZeroToOCLQueue:
+    llvm_unreachable("NULL to OpenCL queue lvalue cast is not valid");
   case CK_ZeroToOCLEvent:
     llvm_unreachable("NULL to OpenCL event lvalue cast is not valid");
   }