[clang] [clang-tools-extra] [llvm] [clang] Simplify device kernel attributes (PR #137882)

[Erich Keane via cfe-commits]

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@@ -3541,7 +3541,7 @@ bool FunctionDecl::isExternC() const {
 }
 
 bool FunctionDecl::isInExternCContext() const {
-  if (hasAttr<OpenCLKernelAttr>())
+  if (hasAttr<DeviceKernelAttr>() && getASTContext().getLangOpts().OpenCL)
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erichkeane wrote:

Is this really the same thing?  Do we prevent enabling multiple kernel-defining languages at the same time?  Should this instead check spelling?

https://github.com/llvm/llvm-project/pull/137882