================
@@ -5465,15 +5465,19 @@ static void handleGlobalAttr(Sema &S, Decl *D, const 
ParsedAttr &AL) {
   if (FD->isInlineSpecified() && !S.getLangOpts().CUDAIsDevice)
     S.Diag(FD->getBeginLoc(), diag::warn_kern_is_inline) << FD;
 
-  if (AL.getKind() == ParsedAttr::AT_DeviceKernel)
-    D->addAttr(::new (S.Context) DeviceKernelAttr(S.Context, AL));
-  else
+  // ***REVIEWER***: the existing code clearly expects either DeviceKernel or
+  // Global, and no others, but this does not appear to be made explicit?
+  if (AL.getKind() == ParsedAttr::AT_DeviceKernel) {
+    if (!D->hasAttr<DeviceKernelAttr>())
+      D->addAttr(::new (S.Context) DeviceKernelAttr(S.Context, AL));
+  } else if (!D->hasAttr<CUDAGlobalAttr>())
     D->addAttr(::new (S.Context) CUDAGlobalAttr(S.Context, AL));
+
----------------
ojhunt wrote:

Fixed as part of change to a switch

https://github.com/llvm/llvm-project/pull/218582
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