[clang] [OpenMP] Introduce the initial support for OpenMP kernel language (PR #66844)

[Johannes Doerfert via cfe-commits]

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@@ -752,27 +751,41 @@ void CGOpenMPRuntimeGPU::emitNonSPMDKernel(const OMPExecutableDirective &D,
   EntryFunctionState EST;
   WrapperFunctionsMap.clear();
 
+  bool IsBareKernel = D.getSingleClause<OMPXBareClause>();
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jdoerfert wrote:

How can a non-spmd kernel be bare? We should force bare kernels to be SPMD, make this an assertion.

https://github.com/llvm/llvm-project/pull/66844