message: [MLIR][NFC] Adopt SymbolTable::UseRange::empty()
diff: @@ -113,7 +113,7 @@ bool HasSingleUse(FuncOp func) {
  // If no uses in this scope, continue looking in parent module
  SymbolTable::UseRange func_uses = func_uses_optional.getValue();
  - if (llvm::empty(func_uses)) continue;
  + if (func_uses.empty()) continue;
  // Check if multiple uses at this scope or another use already seen.
  if (!llvm::hasSingleElement(func_uses) || use_seen) return false;
  