[clang] clang/AMDGPU: Set noalias.addrspace metadata on atomicrmw (PR #102462)

[Matt Arsenault via cfe-commits]

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@@ -647,6 +647,14 @@ class LangOptions : public LangOptionsBase {
     return ConvergentFunctions;
   }
 
+  /// Return true if atomicrmw operations targeting allocations in private
+  /// memory are undefined.
+  bool threadPrivateMemoryAtomicsAreUndefined() const {
+    // Should be false for OpenMP.
+    // TODO: Should this be true for SYCL?
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arsenm wrote:

This is now derived from the builtins rather than the language mode

https://github.com/llvm/llvm-project/pull/102462