[llvm] [NVPTX] Load/Store/Fence syncscope support (PR #106101)

[Artem Belevich via llvm-commits]

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@@ -118,6 +119,8 @@ class NVPTXSubtarget : public NVPTXGenSubtargetInfo {
 
   NVPTXSubtarget &initializeSubtargetDependencies(StringRef CPU, StringRef FS);
   void ParseSubtargetFeatures(StringRef CPU, StringRef TuneCPU, StringRef FS);
+
+  void requireClusters(std::string const &FailureMessage) const;
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Artem-B wrote:

We need to make clear that this produces a fatal error if conditions are not met.

`require` alone does not carry "I am a fatal error" vibe.  
I think we need something painfully obvious, along the lines of `failIfClustersNotAvailable()`. 

https://github.com/llvm/llvm-project/pull/106101