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

[Shilei Tian 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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shiltian wrote:

So `target teams` is generic mode. Since we don't emit the kernel init/deinit, the kernel env will not be emitted as well. At runtime we will default to SPMD mode.
As discussed offline, we will need an extra mode, if we want, but no kernel env should work perfectly fine.

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