[flang-commits] [flang] [flang][acc] Disallow duplicate variables in use_device clause (PR #176217)

[Peter Klausler via flang-commits]

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@@ -379,6 +401,15 @@ class AccAttributeVisitor : DirectiveAttributeVisitor<llvm::acc::Directive> {
       const llvm::acc::Clause clause, const parser::AccObjectList &objectList);
   void AddRoutineInfoToSymbol(
       Symbol &, const parser::OpenACCRoutineConstruct &);
+
+  // Track use_device variables
+  void AddUseDeviceObject(SymbolRef object) { useDeviceObjects_.insert(object); }
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klausler wrote:

I'd put the presence check and error generation into this function instead, using the result from `insert`.

https://github.com/llvm/llvm-project/pull/176217