cone_of_influence.h

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/*******************************************************************\
 
Module: Loop Acceleration
 
Author: Matt Lewis
 
\*******************************************************************/

 
#ifndef CPROVER_GOTO_INSTRUMENT_ACCELERATE_CONE_OF_INFLUENCE_H
#define CPROVER_GOTO_INSTRUMENT_ACCELERATE_CONE_OF_INFLUENCE_H
 
#include <util/namespace.h>
 
#include <goto-programs/goto_program.h>
 
#include <unordered_set>
 
typedef std::unordered_set<exprt, irep_hash> expr_sett;
 
void cone_of_influence(goto_programt &program,
    expr_sett &targets,
    expr_sett &cone);
 
class cone_of_influencet
{
public:
  cone_of_influencet(
    const goto_programt &_program,
    const symbol_table_baset &symbol_table)
    : program(_program), ns(symbol_table)
  {
  }
 
  void cone_of_influence(const expr_sett &targets, expr_sett &cone);
  void cone_of_influence(const exprt &target, expr_sett &cone);
 
protected:
  void cone_of_influence(
    const goto_programt::instructiont &i,
    const expr_sett &curr,
    expr_sett &next);
  void get_succs(
    goto_programt::instructionst::const_reverse_iterator rit,
    expr_sett &targets);
  void gather_rvalues(const exprt &expr, expr_sett &rvals);
 
  typedef std::unordered_map<unsigned int, expr_sett> cone_mapt;
  cone_mapt cone_map;
 
  const goto_programt &program;
  const namespacet ns;
};
 
#endif // CPROVER_GOTO_INSTRUMENT_ACCELERATE_CONE_OF_INFLUENCE_H