[clang] [Clang] Default OpenMP and C/C++ compilations to uniform blocks (PR #221279)

[Matt Arsenault via cfe-commits]

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@@ -334,6 +334,9 @@ class TargetCodeGenInfo {
   /// Get LLVM calling convention for device kernels.
   virtual unsigned getDeviceKernelCallingConv() const;
 
+  /// \return true if the target's launch model delivers complete work-groups.
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arsenm wrote:

It's only a target property in the sense that we would want to hack this in for non-GPU languages on the GPU targets, which is still just a language check with a triple predicate 

https://github.com/llvm/llvm-project/pull/221279