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remove_const_function_pointers.h
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1/*******************************************************************\
2
3Module: Goto Programs
4
5Author: Thomas Kiley, thomas.kiley@diffblue.com
6
7\*******************************************************************/
8
11
12#ifndef CPROVER_GOTO_PROGRAMS_REMOVE_CONST_FUNCTION_POINTERS_H
13#define CPROVER_GOTO_PROGRAMS_REMOVE_CONST_FUNCTION_POINTERS_H
14
15#include <list>
16#include <unordered_set>
17
18#include <util/expr.h>
19#include <util/message.h>
20#include <util/mp_arith.h>
21
24class index_exprt; // IWYU pragma: keep
25class member_exprt; // IWYU pragma: keep
26class namespacet;
27class struct_exprt; // IWYU pragma: keep
28class symbol_exprt; // IWYU pragma: keep
30class typecast_exprt; // IWYU pragma: keep
31
33{
34public:
35 typedef std::unordered_set<symbol_exprt, irep_hash> functionst;
36 typedef std::list<exprt> expressionst;
38 message_handlert &message_handler,
39 const namespacet &ns,
41
42 bool operator()(const exprt &base_expression, functionst &out_functions);
43
44private:
45 exprt replace_const_symbols(const exprt &expression) const;
46 exprt resolve_symbol(const symbol_exprt &symbol_expr) const;
47
48 // recursive functions for dealing with the function pointer
50
53
56
59
62
65
68
69 // recursive functions for dealing with the auxiliary elements
71 const exprt &expr,
73 bool &out_is_const);
74
78 bool &out_is_const);
79
83 bool &out_is_const);
84
88 bool &out_is_const);
89
93 bool &out_is_const);
94
95 bool is_const_expression(const exprt &expression) const;
96 bool is_const_type(const typet &type) const;
97
100
103
107};
108
109#define OPT_REMOVE_CONST_FUNCTION_POINTERS \
110 "(remove-const-function-pointers)"
111
112#define HELP_REMOVE_CONST_FUNCTION_POINTERS \
113 " {y--remove-const-function-pointers} \t " \
114 "remove function pointers that are constant or constant part of an array\n"
115
116#endif // CPROVER_GOTO_PROGRAMS_REMOVE_CONST_FUNCTION_POINTERS_H
Operator to return the address of an object.
ait supplies three of the four components needed: an abstract interpreter (in this case handling func...
Definition ai.h:562
Operator to dereference a pointer.
Base class for all expressions.
Definition expr.h:56
Array index operator.
Definition std_expr.h:1470
Extract member of struct or union.
Definition std_expr.h:2971
Class that provides messages with a built-in verbosity 'level'.
Definition message.h:154
A namespacet is essentially one or two symbol tables bound together, to allow for symbol lookups in t...
Definition namespace.h:91
bool try_resolve_function_call(const exprt &expr, functionst &out_functions)
To resolve an expression to the specific function calls it can be.
bool try_resolve_function_calls(const expressionst &exprs, functionst &out_functions)
To resolve a collection of expressions to the specific function calls they can be.
bool try_resolve_expression(const exprt &expr, expressionst &out_resolved_expression, bool &out_is_const)
To squash various expr types to simplify the expression.
exprt get_component_value(const struct_exprt &struct_expr, const member_exprt &member_expr)
To extract the value of the specific component within a struct.
bool try_resolve_typecast(const typecast_exprt &typecast_expr, expressionst &out_expressions, bool &out_is_const)
To squash a typecast access.
bool try_resolve_dereference_function_call(const dereference_exprt &deref_expr, functionst &out_functions)
To resolve an expression to the specific function calls it can be.
bool try_resolve_member(const member_exprt &member_expr, expressionst &out_expressions, bool &out_is_const)
To squash an member access by first finding the struct it is accessing Then return the squashed value...
bool is_const_type(const typet &type) const
To evaluate the const-ness of the type.
bool try_resolve_index_of_function_call(const index_exprt &index_expr, functionst &out_functions)
To resolve an expression to the specific function calls it can be.
bool try_resolve_index_value(const exprt &index_value_expr, mp_integer &out_array_index)
Given an index into an array, resolve, if possible, the index that is being accessed.
bool operator()(const exprt &base_expression, functionst &out_functions)
To take a function call on a function pointer, and if possible resolve it to a small collection of po...
bool is_const_expression(const exprt &expression) const
To evaluate the const-ness of the expression type.
std::unordered_set< symbol_exprt, irep_hash > functionst
bool try_resolve_address_of_function_call(const address_of_exprt &address_expr, functionst &out_functions)
To resolve an expression to the specific function calls it can be.
bool try_resolve_member_function_call(const member_exprt &member_expr, functionst &out_functions)
To resolve an expression to the specific function calls it can be.
exprt resolve_symbol(const symbol_exprt &symbol_expr) const
Look up a symbol in the symbol table and return its value.
bool try_resolve_index_of(const index_exprt &index_expr, expressionst &out_expressions, bool &out_is_const)
To squash an index access by first finding the array it is accessing Then if the index can be resolve...
bool try_resolve_dereference(const dereference_exprt &deref_expr, expressionst &out_expressions, bool &out_is_const)
To squash a dereference access by first finding the address_of the dereference is dereferencing.
bool try_resolve_typecast_function_call(const typecast_exprt &typecast_expr, functionst &out_functions)
To resolve an expression to the specific function calls it can be.
exprt replace_const_symbols(const exprt &expression) const
To collapse the symbols down to their values where possible This takes a very general approach,...
Struct constructor from list of elements.
Definition std_expr.h:1877
Expression to hold a symbol (variable)
Definition std_expr.h:131
The symbol table base class interface.
Semantic type conversion.
Definition std_expr.h:2073
The type of an expression, extends irept.
Definition type.h:29
exprt deref_expr(const exprt &expr)
Wraps a given expression into a dereference_exprt unless it is an address_of_exprt in which case it j...
BigInt mp_integer
Definition smt_terms.h:17