[OpenCL][NFC] Unify ZeroToOCL* cast types

Reviewers: Anastasia, yaxunl

Reviewed By: Anastasia

Subscribers: asavonic, cfe-commits

Differential Revision: https://reviews.llvm.org/D52654

llvm-svn: 345038
diff --git a/clang/lib/CodeGen/CGExprConstant.cpp b/clang/lib/CodeGen/CGExprConstant.cpp
index 3dbb20d..e1ad656 100644
--- a/clang/lib/CodeGen/CGExprConstant.cpp
+++ b/clang/lib/CodeGen/CGExprConstant.cpp
@@ -869,9 +869,8 @@
     case CK_FloatingToIntegral:
     case CK_FloatingToBoolean:
     case CK_FloatingCast:
-    case CK_ZeroToOCLEvent:
-    case CK_ZeroToOCLQueue:
     case CK_FixedPointCast:
+    case CK_ZeroToOCLOpaqueType:
       return nullptr;
     }
     llvm_unreachable("Invalid CastKind");