Implement OpenCL event_t as Clang builtin type, including event_t related OpenCL restrictions (OpenCL 1.2 spec 6.9)

llvm-svn: 172973

1 files changed, 5 insertions, 0 deletions

diff --git a/clang/lib/CodeGen/CGExprScalar.cpp b/clang/lib/CodeGen/CGExprScalar.cpp
index 5715913b6a9..ed927e2fb4a 100644
--- a/clang/lib/CodeGen/CGExprScalar.cpp
+++ b/clang/lib/CodeGen/CGExprScalar.cpp
@@ -1383,6 +1383,11 @@ Value *ScalarExprEmitter::VisitCastExpr(CastExpr *CE) {
     return EmitComplexToScalarConversion(V, E->getType(), DestTy);
   }
 
+  case CK_ZeroToOCLEvent: {
+    assert(DestTy->isEventT() && "CK_ZeroToOCLEvent cast on non event type");
+    return llvm::Constant::getNullValue(ConvertType(DestTy));
+  }
+
   }
 
   llvm_unreachable("unknown scalar cast");