codeql/docs/language/ql-training/query-examples/cpp/bad-overflow-guard-1.ql

import cpp

from AddExpr a, Variable v, RelationalOperation cmp
where
  a.getAnOperand() = v.getAnAccess() and
  cmp.getAnOperand() = a and
  cmp.getAnOperand() = v.getAnAccess()
select cmp, "Overflow check."