================
@@ -2361,6 +2361,99 @@ static bool DiagnoseHLSLRegisterAttribute(Sema &S, 
SourceLocation &ArgLoc,
   return ValidateMultipleRegisterAnnotations(S, D, RegType);
 }
 
+bool ExceedsUInt32Max(llvm::StringRef S) {
+  constexpr size_t MaxDigits = 10; // UINT32_MAX = 4294967295
+  if (S.size() > MaxDigits)
+    return true;
+
+  if (S.size() < MaxDigits)
+    return false;
----------------
bob80905 wrote:

See the response to your comment: I'm wondering why we need to do the tests 
against the string version rather than just against the APInt one?

https://github.com/llvm/llvm-project/pull/174028
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