value_set_pointer_abstract_object.h

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/*******************************************************************\
 
 Module: analyses variable-sensitivity
 
 Author: Diffblue Ltd.
 
\*******************************************************************/
 
 
#ifndef CPROVER_ANALYSES_VARIABLE_SENSITIVITY_VALUE_SET_POINTER_ABSTRACT_OBJECT_H
#define CPROVER_ANALYSES_VARIABLE_SENSITIVITY_VALUE_SET_POINTER_ABSTRACT_OBJECT_H
 
#include <analyses/variable-sensitivity/abstract_object_set.h>
#include <analyses/variable-sensitivity/abstract_pointer_object.h>
 
class value_set_pointer_abstract_objectt : public abstract_pointer_objectt,
                                           public value_set_tag
{
public:
  value_set_pointer_abstract_objectt(
    const typet &new_type,
    bool top,
    bool bottom,
    const abstract_object_sett &new_values);
 
  value_set_pointer_abstract_objectt(const typet &type, bool top, bool bottom);
 
  value_set_pointer_abstract_objectt(
    const exprt &expr,
    const abstract_environmentt &environment,
    const namespacet &ns);
 
  exprt to_constant() const override
  {
    verify();
    return values.size() == 1 ? (*values.begin())->to_constant()
                              : abstract_objectt::to_constant();
  }
 
  const abstract_object_sett &get_values() const override
  {
    return values;
  }
 
  void set_values(const abstract_object_sett &other_values);
 
  static const size_t max_value_set_size = 10;
 
  abstract_object_pointert read_dereference(
    const abstract_environmentt &env,
    const namespacet &ns) const override;
 
  abstract_object_pointert write_dereference(
    abstract_environmentt &environment,
    const namespacet &ns,
    const std::stack<exprt> &stack,
    const abstract_object_pointert &new_value,
    bool merging_write) const override;
 
  abstract_object_pointert typecast(
    const typet &new_type,
    const abstract_environmentt &environment,
    const namespacet &ns) const override;
 
  abstract_object_pointert ptr_diff(
    const exprt &expr,
    const std::vector<abstract_object_pointert> &operands,
    const abstract_environmentt &environment,
    const namespacet &ns) const override;
 
  exprt ptr_comparison_expr(
    const exprt &expr,
    const std::vector<abstract_object_pointert> &operands,
    const abstract_environmentt &environment,
    const namespacet &ns) const override;
 
  void output(std::ostream &out, const ai_baset &ai, const namespacet &ns)
    const override;
 
protected:
  CLONE
 
  abstract_object_pointert merge(
    const abstract_object_pointert &other,
    const widen_modet &widen_mode) const override;
 
  exprt to_predicate_internal(const exprt &name) const override;
 
private:
  abstract_object_pointert
  resolve_values(const abstract_object_sett &new_values) const;
 
  // data
  abstract_object_sett values;
};
 
#endif // CPROVER_ANALYSES_VARIABLE_SENSITIVITY_VALUE_SET_POINTER_ABSTRACT_OBJECT_H