51 id.starts_with(
"value_set::dynamic_object") ||
52 id ==
"value_set::return_value" ||
id ==
"value_set::memory")
56 return type.
id() == ID_struct || type.
id() == ID_struct_tag;
62 return !found.has_value() ? nullptr : &(found->get());
79 if(existing_entry.has_value())
109 auto entry=dest.
read().find(n);
111 if(entry==dest.
read().end())
116 else if(!entry->second)
118 else if(offset && *entry->second == *offset)
133 auto &new_offset = dest.
write()[n];
149 display_name = id2string(e.identifier) + e.suffix;
152 else if(e.
identifier ==
"value_set::return_value")
154 display_name =
"RETURN_VALUE" + e.suffix;
160 const symbolt &symbol=ns.lookup(e.identifier);
161 display_name=id2string(symbol.display_name())+e.suffix;
162 identifier=symbol.name;
164 identifier = id2string(e.identifier);
165 display_name = id2string(identifier) + e.suffix;
169 out << indent << display_name <<
" = { ";
173 std::size_t width = 0;
175 for(object_map_dt::const_iterator o_it = object_map.begin();
176 o_it != object_map.end();
179 const exprt &o = object_numbering[o_it->first];
181 std::ostringstream stream;
183 if(o.id() == ID_invalid || o.id() == ID_unknown)
187 stream <<
"<" << format(o) <<
", ";
190 stream << *o_it->second;
194 if(o.type().is_nil())
197 stream <<
", " << format(o.type());
202 const std::string result = stream.str();
204 width += result.size();
206 object_map_dt::const_iterator next(o_it);
209 if(next != object_map.end())
213 out <<
"\n" << std::string(indent.size(),
' ') <<
" ";
228 for(
const auto &values_entry : view)
235 value_entries.expr_set();
237 for(value_sett::expr_sett::const_iterator
238 e_it=expr_set.begin();
239 e_it!=expr_set.end();
242 std::string value_str=
258 if(
object.
id()==ID_invalid ||
259 object.
id()==ID_unknown)
271 return std::move(od);
282 for(
const auto &delta_entry : delta_view)
284 if(delta_entry.is_in_both_maps())
287 delta_entry.get_other_map_value().object_map,
288 delta_entry.m.object_map))
291 make_union(existing_entry.object_map, delta_entry.m.object_map);
310 for(
const auto &number_and_offset : src.
read())
314 dest, number_and_offset.first, number_and_offset.second) !=
328 for(object_map_dt::const_iterator it=src.
read().begin();
329 it!=src.
read().end();
345 if(expr.
id()==ID_pointer_offset)
354 for(object_map_dt::const_iterator
355 it=object_map.begin();
356 it!=object_map.end();
365 if(!ptr_offset.has_value())
368 *ptr_offset += *it->second;
370 if(mod && *ptr_offset != previous_offset)
374 previous_offset = *ptr_offset;
395 .map([&](
const object_map_dt::value_type &pair) {
return to_expr(pair); });
401 bool is_simplified)
const
407 bool includes_nondet_pointer =
false;
410 if(includes_nondet_pointer && expr.
type().
id() == ID_pointer)
432 const std::string &suffix,
const std::string &field)
437 suffix.compare(1, field.length(), field) == 0 &&
438 (suffix.length() == field.length() + 1 ||
439 suffix[field.length() + 1] ==
'.' ||
440 suffix[field.length() + 1] ==
'[');
444 const std::string &suffix,
const std::string &field)
448 "suffix should start with " + field);
449 return suffix.substr(field.length() + 1);
455 const std::string &suffix,
459 type.
id() != ID_pointer && type.
id() != ID_signedbv &&
460 type.
id() != ID_unsignedbv && type.
id() != ID_array &&
461 type.
id() != ID_struct && type.
id() != ID_struct_tag &&
462 type.
id() != ID_union && type.
id() != ID_union_tag)
471 return std::move(index);
473 const typet &followed_type = type.
id() == ID_struct_tag
475 : type.
id() == ID_union_tag
480 if(followed_type.
id() == ID_struct || followed_type.
id() == ID_union)
487 const irep_idt &first_component_name =
488 struct_union_type.
components().front().get_name();
494 return std::move(index);
501 return std::move(identifier);
509 bool &includes_nondet_pointer,
510 const std::string &suffix,
511 const typet &original_type,
515 std::cout <<
"GET_VALUE_SET_REC EXPR: " <<
format(expr) <<
"\n";
516 std::cout <<
"GET_VALUE_SET_REC SUFFIX: " << suffix <<
'\n';
521 if(expr.
id()==ID_unknown || expr.
id()==ID_invalid)
525 else if(expr.
id()==ID_index)
530 type.
id() == ID_array,
"operand 0 of index expression must be an array");
535 includes_nondet_pointer,
540 else if(expr.
id()==ID_member)
545 type.
id() == ID_struct || type.
id() == ID_union,
546 "compound of member expression must be struct or union");
548 const std::string &component_name=
554 includes_nondet_pointer,
555 "." + component_name + suffix,
559 else if(expr.
id()==ID_symbol)
564 if(entry_index.has_value())
569 else if(expr.
id() == ID_nondet_symbol)
571 if(expr.
type().
id() == ID_pointer)
572 includes_nondet_pointer =
true;
576 else if(expr.
id()==ID_if)
581 includes_nondet_pointer,
588 includes_nondet_pointer,
593 else if(expr.
id()==ID_address_of)
597 else if(expr.
id()==ID_dereference)
603 if(object_map.begin()==object_map.end())
607 for(object_map_dt::const_iterator
608 it1=object_map.begin();
609 it1!=object_map.end();
616 object, dest, includes_nondet_pointer, suffix, original_type, ns);
630 else if(expr_type.
id()==ID_unsignedbv ||
631 expr_type.
id()==ID_signedbv)
639 else if(expr.
id()==ID_typecast)
644 const typet &op_type = op.type();
646 if(op_type.
id()==ID_pointer)
650 op, dest, includes_nondet_pointer, suffix, original_type, ns);
653 op_type.
id() == ID_unsignedbv || op_type.
id() == ID_signedbv ||
654 op_type.
id() == ID_bv)
668 op, tmp, includes_nondet_pointer, suffix, original_type, ns);
670 if(tmp.
read().empty())
675 else if(tmp.
read().size()==1 &&
692 expr.
id() == ID_plus || expr.
id() == ID_minus || expr.
id() == ID_bitor ||
693 expr.
id() == ID_bitand || expr.
id() == ID_bitxor ||
694 expr.
id() == ID_bitnand || expr.
id() == ID_bitnor ||
695 expr.
id() == ID_bitxnor)
698 throw expr.
id_string()+
" expected to have at least two operands";
701 std::optional<mp_integer> i;
704 std::optional<exprt> ptr_operand;
706 expr_type.
id() == ID_pointer &&
707 (expr.
id() == ID_plus || expr.
id() == ID_minus))
709 bool non_const_offset =
false;
710 for(
const auto &op : expr.
operands())
712 if(op.type().id() == ID_pointer)
714 if(ptr_operand.has_value())
722 else if(!non_const_offset)
724 auto offset = numeric_cast<mp_integer>(op);
725 if(!offset.has_value())
728 non_const_offset =
true;
739 if(ptr_operand.has_value() && i.has_value())
741 typet pointer_base_type =
743 if(pointer_base_type.
id() == ID_empty)
748 if(!size.has_value() || (*size) == 0)
756 if(expr.
id()==ID_minus)
760 "unexpected subtraction of pointer from integer");
767 if(ptr_operand.has_value())
772 includes_nondet_pointer,
780 for(
const auto &op : expr.
operands())
783 op, pointer_expr_set, includes_nondet_pointer,
"", op.type(), ns);
787 for(object_map_dt::const_iterator
788 it=pointer_expr_set.
read().begin();
789 it!=pointer_expr_set.
read().end();
795 if(offset && i.has_value())
800 insert(dest, it->first, offset);
803 else if(expr.
id()==ID_mult)
809 throw expr.
id_string()+
" expected to have at least two operands";
814 for(
const auto &op : expr.
operands())
817 op, pointer_expr_set, includes_nondet_pointer,
"", op.type(), ns);
820 for(object_map_dt::const_iterator
821 it=pointer_expr_set.
read().begin();
822 it!=pointer_expr_set.
read().end();
830 insert(dest, it->first, offset);
833 else if(expr.
id() == ID_lshr || expr.
id() == ID_ashr || expr.
id() == ID_shl)
841 includes_nondet_pointer,
846 for(
const auto &object_map_entry : pointer_expr_set.
read())
848 offsett offset = object_map_entry.second;
853 insert(dest, object_map_entry.first, offset);
856 else if(expr.
id()==ID_side_effect)
860 if(statement==ID_function_call)
863 throw "unexpected function_call sideeffect";
865 else if(statement==ID_allocate)
869 const typet &dynamic_type=
870 static_cast<const typet &
>(expr.
find(ID_C_cxx_alloc_type));
878 else if(statement==ID_cpp_new ||
879 statement==ID_cpp_new_array)
894 else if(expr.
id()==ID_struct)
898 struct_components.size() == expr.
operands().size(),
899 "struct expression should have an operand per component");
900 auto component_iter = struct_components.begin();
901 bool found_component =
false;
905 for(
const auto &op : expr.
operands())
907 const std::string &component_name =
911 std::string remaining_suffix =
916 includes_nondet_pointer,
920 found_component =
true;
930 for(
const auto &op : expr.
operands())
933 op, dest, includes_nondet_pointer, suffix, original_type, ns);
937 else if(expr.
id() == ID_union)
942 includes_nondet_pointer,
947 else if(expr.
id()==ID_with)
953 if(expr_type.
id() == ID_struct && !suffix.
empty())
959 std::string remaining_suffix =
964 includes_nondet_pointer,
975 includes_nondet_pointer,
988 includes_nondet_pointer,
995 includes_nondet_pointer,
1001 else if(expr_type.
id() == ID_array && !suffix.
empty())
1003 std::string new_value_suffix;
1005 new_value_suffix = suffix.substr(2);
1013 includes_nondet_pointer,
1020 includes_nondet_pointer,
1032 includes_nondet_pointer,
1039 includes_nondet_pointer,
1045 else if(expr.
id()==ID_array)
1048 std::string new_suffix = suffix;
1050 new_suffix = suffix.substr(2);
1054 for(
const auto &op : expr.
operands())
1057 op, dest, includes_nondet_pointer, new_suffix, original_type, ns);
1060 else if(expr.
id()==ID_array_of)
1063 std::string new_suffix = suffix;
1065 new_suffix = suffix.substr(2);
1072 includes_nondet_pointer,
1077 else if(expr.
id()==ID_dynamic_object)
1082 const std::string prefix=
1083 "value_set::dynamic_object"+
1087 const std::string full_name=prefix+suffix;
1101 else if(expr.
id()==ID_byte_extract_little_endian ||
1102 expr.
id()==ID_byte_extract_big_endian)
1108 const typet &op_type = ns.
follow(byte_extract_expr.op().type());
1109 if(op_type.
id() == ID_struct)
1111 exprt offset = byte_extract_expr.offset();
1115 const auto offset_int = numeric_cast<mp_integer>(offset);
1120 for(
const auto &c : struct_type.
components())
1122 const irep_idt &name = c.get_name();
1124 if(offset_int.has_value())
1127 if(comp_offset.has_value())
1130 type_size.has_value() && *offset_int + *type_size <= *comp_offset)
1137 member_size.has_value() &&
1138 *offset_int >= *comp_offset + *member_size)
1149 member, dest, includes_nondet_pointer, suffix, original_type, ns);
1153 if(op_type.
id() == ID_union)
1158 const irep_idt &name = c.get_name();
1159 member_exprt member(byte_extract_expr.op(), name, c.type());
1161 member, dest, includes_nondet_pointer, suffix, original_type, ns);
1168 byte_extract_expr.op(),
1170 includes_nondet_pointer,
1175 else if(expr.
id()==ID_byte_update_little_endian ||
1176 expr.
id()==ID_byte_update_big_endian)
1182 byte_update_expr.op(),
1184 includes_nondet_pointer,
1189 byte_update_expr.value(),
1191 includes_nondet_pointer,
1198 else if(expr.
id() == ID_let)
1203 value_sett value_set_with_local_definition = *
this;
1204 value_set_with_local_definition.
assign(
1205 let_expr.symbol(), let_expr.value(), ns,
false,
false);
1210 includes_nondet_pointer,
1215 else if(
auto eb = expr_try_dynamic_cast<extractbits_exprt>(expr))
1221 includes_nondet_pointer,
1226 for(
const auto &object_map_entry : pointer_expr_set.
read())
1228 offsett offset = object_map_entry.second;
1233 insert(dest, object_map_entry.first, offset);
1239 for(
const auto &op : expr.
operands())
1242 op, pointer_expr_set, includes_nondet_pointer,
"", original_type, ns);
1245 for(
const auto &object_map_entry : pointer_expr_set.
read())
1247 offsett offset = object_map_entry.second;
1252 insert(dest, object_map_entry.first, offset);
1255 if(pointer_expr_set.
read().empty())
1260 std::cout <<
"GET_VALUE_SET_REC RESULT:\n";
1261 for(
const auto &obj : dest.
read())
1264 std::cout <<
" " <<
format(e) <<
"\n";
1275 if(src.
id()==ID_typecast)
1293 for(object_map_dt::const_iterator
1294 it=object_map.
read().begin();
1295 it!=object_map.
read().end();
1306 std::cout <<
"GET_REFERENCE_SET_REC EXPR: " <<
format(expr)
1310 if(expr.
id()==ID_symbol ||
1311 expr.
id()==ID_dynamic_object ||
1312 expr.
id()==ID_string_constant ||
1313 expr.
id()==ID_array)
1316 expr.
type().
id() == ID_array &&
1324 else if(expr.
id()==ID_dereference)
1328 bool includes_nondet_pointer =
false;
1330 pointer, dest, includes_nondet_pointer,
"", pointer.type(), ns);
1333 for(
const auto &map_entry : dest.
read())
1342 else if(expr.
id()==ID_index)
1345 throw "index expected to have two operands";
1352 array.
type().
id() == ID_array,
"index takes array-typed operand");
1361 for(object_map_dt::const_iterator
1362 a_it=object_map.begin();
1363 a_it!=object_map.end();
1368 if(
object.
id()==ID_unknown)
1377 const auto i = numeric_cast<mp_integer>(offset);
1382 else if(i.has_value() && o)
1386 if(!size.has_value() || *size == 0)
1394 insert(dest, deref_index_expr, o);
1400 else if(expr.
id()==ID_member)
1402 const irep_idt &component_name=expr.
get(ID_component_name);
1411 for(object_map_dt::const_iterator
1412 it=object_map.begin();
1413 it!=object_map.end();
1418 if(
object.
id()==ID_unknown)
1421 object.type().
id() == ID_struct ||
1422 object.type().
id() == ID_struct_tag ||
object.type().
id() == ID_union ||
1423 object.type().
id() == ID_union_tag)
1432 const typet &final_object_type = ns.
follow(
object.type());
1434 if(final_object_type.
id()==ID_struct ||
1435 final_object_type.
id()==ID_union)
1438 if(ns.
follow(struct_op.
type())!=final_object_type)
1444 insert(dest, member_expr, o);
1455 else if(expr.
id()==ID_if)
1473 std::cout <<
"ASSIGN LHS: " <<
format(lhs) <<
" : "
1475 std::cout <<
"ASSIGN RHS: " <<
format(rhs) <<
" : "
1477 std::cout <<
"--------------------------------------------\n";
1483 if(type.
id() == ID_struct)
1487 const typet &subtype = c.type();
1488 const irep_idt &name = c.get_name();
1492 subtype.
id() != ID_code,
"struct member must not be of code type");
1493 if(c.get_is_padding())
1500 if(rhs.
id()==ID_unknown ||
1501 rhs.
id()==ID_invalid)
1506 rhs_member=
exprt(rhs.
id(), subtype);
1512 "value_sett::assign types should match, got: "
1518 if(followed.
id() == ID_struct || followed.
id() == ID_union)
1526 assign(lhs_member, rhs_member, ns,
true, add_to_sets);
1531 else if(type.
id()==ID_array)
1538 if(rhs.
id()==ID_unknown ||
1539 rhs.
id()==ID_invalid)
1552 "value_sett::assign types should match, got: "
1556 if(rhs.
id()==ID_array_of)
1567 for(
const auto &op : rhs.
operands())
1569 assign(lhs_index, op, ns, is_simplified, add_to_sets);
1573 else if(rhs.
id()==ID_with)
1580 assign(lhs_index, op0_index, ns, is_simplified, add_to_sets);
1582 lhs_index,
to_with_expr(rhs).new_value(), ns, is_simplified,
true);
1590 assign(lhs_index, rhs_index, ns, is_simplified,
true);
1605 assign_rec(lhs, values_rhs,
"", ns, add_to_sets);
1612 const std::string &suffix,
1617 std::cout <<
"ASSIGN_REC LHS: " <<
format(lhs) <<
'\n';
1618 std::cout <<
"ASSIGN_REC LHS ID: " << lhs.
id() <<
'\n';
1619 std::cout <<
"ASSIGN_REC SUFFIX: " << suffix <<
'\n';
1621 for(object_map_dt::const_iterator it=values_rhs.
read().begin();
1622 it!=values_rhs.
read().end();
1624 std::cout <<
"ASSIGN_REC RHS: " <<
1629 if(lhs.
id()==ID_symbol)
1634 entryt{identifier, suffix}, lhs.
type(), values_rhs, add_to_sets);
1636 else if(lhs.
id()==ID_dynamic_object)
1641 const std::string name=
1642 "value_set::dynamic_object"+
1647 else if(lhs.
id()==ID_dereference)
1650 throw lhs.
id_string()+
" expected to have one operand";
1655 if(reference_set.
read().size()!=1)
1658 for(object_map_dt::const_iterator
1659 it=reference_set.
read().begin();
1660 it!=reference_set.
read().end();
1667 if(
object.
id()!=ID_unknown)
1668 assign_rec(
object, values_rhs, suffix, ns, add_to_sets);
1671 else if(lhs.
id()==ID_index)
1675 const typet &type = array.type();
1678 type.
id() == ID_array,
"operand 0 of index expression must be an array");
1680 assign_rec(array, values_rhs,
"[]" + suffix, ns,
true);
1682 else if(lhs.
id()==ID_member)
1685 const auto &component_name = lhs_member_expr.get_component_name();
1687 const typet &type = ns.
follow(lhs_member_expr.compound().type());
1690 type.
id() == ID_struct || type.
id() == ID_union,
1691 "operand 0 of member expression must be struct or union");
1694 lhs_member_expr.compound(),
1696 "." +
id2string(component_name) + suffix,
1700 else if(lhs.
id()==
"valid_object" ||
1701 lhs.
id()==
"dynamic_type" ||
1702 lhs.
id()==
"is_zero_string" ||
1703 lhs.
id()==
"zero_string" ||
1704 lhs.
id()==
"zero_string_length")
1708 else if(lhs.
id()==ID_string_constant)
1713 else if(lhs.
id() == ID_null_object)
1717 else if(lhs.
id()==ID_typecast)
1721 assign_rec(typecast_expr.
op(), values_rhs, suffix, ns, add_to_sets);
1723 else if(lhs.
id()==ID_byte_extract_little_endian ||
1724 lhs.
id()==ID_byte_extract_big_endian)
1728 else if(lhs.
id()==ID_integer_address)
1734 throw "assign NYI: '" + lhs.
id_string() +
"'";
1752 for(std::size_t i=0; i<arguments.size(); i++)
1754 const std::string identifier=
"value_set::dummy_arg_"+
std::to_string(i);
1755 const symbol_exprt dummy_lhs(identifier, arguments[i].type());
1756 assign(dummy_lhs, arguments[i], ns,
false,
false);
1763 for(code_typet::parameterst::const_iterator
1764 it=parameter_types.begin();
1765 it!=parameter_types.end();
1768 const irep_idt &identifier=it->get_identifier();
1769 if(identifier.
empty())
1776 assign(actual_lhs, v_expr, ns,
true,
true);
1792 assign(lhs, rhs, ns,
false,
false);
1801 if(statement==ID_block)
1803 for(
const auto &op : code.
operands())
1806 else if(statement==ID_function_call)
1811 else if(statement==ID_assign)
1814 throw "assignment expected to have two operands";
1818 else if(statement==ID_decl)
1821 throw "decl expected to have one operand";
1825 if(lhs.
id()!=ID_symbol)
1826 throw "decl expected to have symbol on lhs";
1831 lhs_type.
id() == ID_pointer ||
1832 (lhs_type.
id() == ID_array &&
1839 assign(lhs, address_of_expr, ns,
false,
false);
1845 else if(statement==ID_expression)
1849 else if(statement == ID_cpp_delete || statement == ID_cpp_delete_array)
1853 else if(statement==
"lock" || statement==
"unlock")
1857 else if(statement==ID_asm)
1861 else if(statement==ID_nondet)
1865 else if(statement==ID_printf)
1869 else if(statement==ID_return)
1877 else if(statement==ID_array_set)
1880 else if(statement==ID_array_copy)
1883 else if(statement==ID_array_replace)
1886 else if(statement == ID_array_equal)
1889 else if(statement==ID_assume)
1893 else if(statement==ID_user_specified_predicate ||
1894 statement==ID_user_specified_parameter_predicates ||
1895 statement==ID_user_specified_return_predicates)
1899 else if(statement==ID_fence)
1906 else if(statement==ID_dead)
1910 else if(statement == ID_havoc_object)
1916 throw "value_sett: unexpected statement: "+
id2string(statement);
1924 if(expr.
id()==ID_and)
1926 for(
const auto &op : expr.
operands())
1929 else if(expr.
id()==ID_equal)
1932 else if(expr.
id()==ID_notequal)
1935 else if(expr.
id()==ID_not)
1938 else if(expr.
id()==ID_dynamic_object)
1954 const std::unordered_set<exprt, irep_hash> &values_to_erase)
1956 if(values_to_erase.empty())
1963 std::vector<object_map_dt::key_type> keys_to_erase;
1965 for(
auto &key_value : entry->object_map.read())
1967 const auto &rhs_object =
to_expr(key_value);
1968 if(values_to_erase.count(rhs_object))
1970 keys_to_erase.emplace_back(key_value.first);
1975 keys_to_erase.size() == values_to_erase.size(),
1976 "value_sett::erase_value_from_entry() should erase exactly one value for "
1977 "each element in the set it is given");
1979 entryt replacement = *entry;
1980 for(
const auto &key_to_erase : keys_to_erase)
1989 const std::string &erase_prefix,
1992 for(
const auto &c : struct_union_type.
components())
1994 const typet &subtype = c.type();
1995 const irep_idt &name = c.get_name();
1999 subtype.
id() != ID_code,
"struct/union member must not be of code type");
2000 if(c.get_is_padding())
2009 const std::string &erase_prefix,
2012 if(type.
id() == ID_struct_tag)
2015 else if(type.
id() == ID_union_tag)
2018 else if(type.
id() == ID_array)
2020 to_array_type(type).element_type(), erase_prefix +
"[]", ns);
std::optional< symbol_exprt > get_failed_symbol(const symbol_exprt &expr, const namespacet &ns)
Get the failed-dereference symbol for the given symbol.
API to expression classes for bitvectors.
Expression classes for byte-level operators.
const byte_update_exprt & to_byte_update_expr(const exprt &expr)
const byte_extract_exprt & to_byte_extract_expr(const exprt &expr)
unsignedbv_typet unsigned_char_type()
bitvector_typet char_type()
bitvector_typet c_index_type()
const union_tag_typet & to_union_tag_type(const typet &type)
Cast a typet to a union_tag_typet.
const union_typet & to_union_type(const typet &type)
Cast a typet to a union_typet.
Operator to return the address of an object.
const typet & element_type() const
The type of the elements of the array.
A base class for binary expressions.
goto_instruction_codet representation of a "return from a function" statement.
const exprt & return_value() const
std::vector< parametert > parameterst
const parameterst & parameters() const
Data structure for representing an arbitrary statement in a program.
const irep_idt & get_statement() const
dstringt has one field, an unsigned integer no which is an index into a static table of strings.
bool starts_with(const char *s) const
equivalent of as_string().starts_with(s)
Representation of heap-allocated objects.
unsigned int get_instance() const
void set_instance(unsigned int instance)
Base class for all expressions.
std::vector< exprt > operandst
bool is_zero() const
Return whether the expression is a constant representing 0.
typet & type()
Return the type of the expression.
bool is_constant() const
Return whether the expression is a constant.
std::string pretty(unsigned indent=0, unsigned max_indent=0) const
const irept & find(const irep_idt &name) const
const irep_idt & get(const irep_idt &name) const
const std::string & id_string() const
const irep_idt & id() const
const std::string & get_string(const irep_idt &name) const
Extract member of struct or union.
const exprt & compound() const
const typet & follow(const typet &) const
Resolve type symbol to the type it points to.
const union_typet & follow_tag(const union_tag_typet &) const
Follow type tag of union type.
A namespacet is essentially one or two symbol tables bound together, to allow for symbol lookups in t...
bool lookup(const irep_idt &name, const symbolt *&symbol) const override
See documentation for namespace_baset::lookup().
Split an expression into a base object and a (byte) offset.
const typet & base_type() const
The type of the data what we point to.
std::vector< view_itemt > viewt
View of the key-value pairs in the map.
void insert(const key_type &k, valueU &&m)
Insert element, element must not exist in map.
void iterate(std::function< void(const key_type &k, const mapped_type &m)> f) const
Call a function for every key-value pair in the map.
void erase(const key_type &k)
Erase element, element must exist in map.
bool has_key(const key_type &k) const
Check if key is in map.
void replace(const key_type &k, valueU &&m)
Replace element, element must exist in map.
std::vector< delta_view_itemt > delta_viewt
Delta view of the key-value pairs in two maps.
std::optional< std::reference_wrapper< const mapped_type > > find(const key_type &k) const
Find element.
void get_delta_view(const sharing_mapt &other, delta_viewt &delta_view, const bool only_common=true) const
Get a delta view of the elements in the map.
void get_view(V &view) const
Get a view of the elements in the map A view is a list of pairs with the components being const refer...
void update(const key_type &k, std::function< void(mapped_type &)> mutator)
Update an element in place; element must exist in map.
const irep_idt & get_statement() const
Structure type, corresponds to C style structs.
Base type for structs and unions.
const typet & component_type(const irep_idt &component_name) const
const componentst & components() const
Expression to hold a symbol (variable)
const irep_idt & get_identifier() const
typet type
Type of symbol.
The Boolean constant true.
Semantic type conversion.
static exprt conditional_cast(const exprt &expr, const typet &type)
The type of an expression, extends irept.
std::list< exprt > valuest
State type in value_set_domaint, used in value-set analysis and goto-symex.
virtual void apply_code_rec(const codet &code, const namespacet &ns)
Subclass customisation point for applying code to this domain:
bool eval_pointer_offset(exprt &expr, const namespacet &ns) const
Tries to resolve any pointer_offset_exprt expressions in expr to constant integers using this value-s...
const entryt * find_entry(const irep_idt &id) const
Finds an entry in this value-set.
std::vector< exprt > get_value_set(exprt expr, const namespacet &ns) const
Gets values pointed to by expr, including following dereference operators (i.e.
virtual void get_value_set_rec(const exprt &expr, object_mapt &dest, bool &includes_nondet_pointer, const std::string &suffix, const typet &original_type, const namespacet &ns) const
Subclass customisation point for recursion over RHS expression.
xmlt output_xml(void) const
Output the value set formatted as XML.
void output(std::ostream &out, const std::string &indent="") const
Pretty-print this value-set.
void dereference_rec(const exprt &src, exprt &dest) const
Sets dest to src with any wrapping typecasts removed.
void erase_symbol(const symbol_exprt &symbol_expr, const namespacet &ns)
valuest values
Stores the LHS ID -> RHS expression set map.
unsigned location_number
Matches the location_number field of the instruction that corresponds to this value_sett instance in ...
static object_numberingt object_numbering
Global shared object numbering, used to abbreviate expressions stored in value sets.
bool insert(object_mapt &dest, const object_map_dt::value_type &it) const
Merges an existing element into an object map.
void erase_struct_union_symbol(const struct_union_typet &struct_union_type, const std::string &erase_prefix, const namespacet &ns)
std::optional< mp_integer > offsett
Represents the offset into an object: either a unique integer offset, or an unknown value,...
void get_reference_set_rec(const exprt &expr, object_mapt &dest, const namespacet &ns) const
See get_reference_set.
exprt to_expr(const object_map_dt::value_type &it) const
Converts an object_map_dt element object_number -> offset into an object_descriptor_exprt with ....
void erase_values_from_entry(const irep_idt &index, const std::unordered_set< exprt, irep_hash > &values_to_erase)
Update the entry stored at index by erasing any values listed in values_to_erase.
void update_entry(const entryt &e, const typet &type, const object_mapt &new_values, bool add_to_sets)
Adds or replaces an entry in this value-set.
void assign(const exprt &lhs, const exprt &rhs, const namespacet &ns, bool is_simplified, bool add_to_sets)
Transforms this value-set by executing executing the assignment lhs := rhs against it.
virtual void assign_rec(const exprt &lhs, const object_mapt &values_rhs, const std::string &suffix, const namespacet &ns, bool add_to_sets)
Subclass customisation point for recursion over LHS expression:
insert_actiont get_insert_action(const object_mapt &dest, object_numberingt::number_type n, const offsett &offset) const
Determines what would happen if object number n was inserted into map dest with offset offset – the p...
bool make_union(object_mapt &dest, const object_mapt &src) const
Merges two RHS expression sets.
virtual bool field_sensitive(const irep_idt &id, const typet &type)
Determines whether an identifier of a given type should have its fields distinguished.
void guard(const exprt &expr, const namespacet &ns)
Transforms this value-set by assuming an expression holds.
bool make_union_would_change(const object_mapt &dest, const object_mapt &src) const
Determines whether merging two RHS expression sets would cause any change.
void do_end_function(const exprt &lhs, const namespacet &ns)
Transforms this value-set by assigning this function's return value to a given LHS expression.
static const object_map_dt empty_object_map
void do_function_call(const irep_idt &function, const exprt::operandst &arguments, const namespacet &ns)
Transforms this value-set by executing the actual -> formal parameter assignments for a particular ca...
void get_reference_set(const exprt &expr, value_setst::valuest &dest, const namespacet &ns) const
Gets the set of expressions that expr may refer to, according to this value set.
virtual void apply_assign_side_effects(const exprt &lhs, const exprt &rhs, const namespacet &)
Subclass customisation point to apply global side-effects to this domain, after RHS values are read b...
std::map< object_numberingt::number_type, offsett > object_map_dt
Represents a set of expressions (exprt instances) with corresponding offsets (offsett instances).
virtual void adjust_assign_rhs_values(const exprt &rhs, const namespacet &, object_mapt &rhs_values) const
Subclass customisation point to filter or otherwise alter the value-set returned from get_value_set b...
std::optional< irep_idt > get_index_of_symbol(irep_idt identifier, const typet &type, const std::string &suffix, const namespacet &ns) const
Get the index of the symbol and suffix.
void erase_symbol_rec(const typet &type, const std::string &erase_prefix, const namespacet &ns)
Operator to update elements in structs and arrays.
xmlt & new_element(const std::string &key)
static void escape(const std::string &s, std::ostream &out)
escaping for XML elements
std::unordered_set< exprt, irep_hash > expr_sett
bool has_prefix(const std::string &s, const std::string &prefix)
#define Forall_operands(it, expr)
bool is_null_pointer(const constant_exprt &expr)
Returns true if expr has a pointer type and a value NULL; it also returns true when expr has value ze...
Deprecated expression utility functions.
const code_returnt & to_code_return(const goto_instruction_codet &code)
bool can_cast_expr< code_inputt >(const exprt &base)
bool can_cast_expr< code_outputt >(const exprt &base)
const std::string & id2string(const irep_idt &d)
std::string from_expr(const namespacet &ns, const irep_idt &identifier, const exprt &expr)
API to expression classes for Pointers.
const pointer_offset_exprt & to_pointer_offset_expr(const exprt &expr)
Cast an exprt to a pointer_offset_exprt.
const dereference_exprt & to_dereference_expr(const exprt &expr)
Cast an exprt to a dereference_exprt.
const pointer_typet & to_pointer_type(const typet &type)
Cast a typet to a pointer_typet.
const dynamic_object_exprt & to_dynamic_object_expr(const exprt &expr)
Cast an exprt to a dynamic_object_exprt.
const address_of_exprt & to_address_of_expr(const exprt &expr)
Cast an exprt to an address_of_exprt.
std::optional< mp_integer > compute_pointer_offset(const exprt &expr, const namespacet &ns)
std::optional< mp_integer > member_offset(const struct_typet &type, const irep_idt &member, const namespacet &ns)
std::optional< mp_integer > pointer_offset_size(const typet &type, const namespacet &ns)
Compute the size of a type in bytes, rounding up to full bytes.
Ranges: pair of begin and end iterators, which can be initialized from containers,...
ranget< iteratort > make_range(iteratort begin, iteratort end)
bool simplify(exprt &expr, const namespacet &ns)
exprt simplify_expr(exprt src, const namespacet &ns)
#define UNREACHABLE
This should be used to mark dead code.
#define DATA_INVARIANT(CONDITION, REASON)
This condition should be used to document that assumptions that are made on goto_functions,...
#define PRECONDITION(CONDITION)
#define INVARIANT(CONDITION, REASON)
This macro uses the wrapper function 'invariant_violated_string'.
side_effect_exprt & to_side_effect_expr(exprt &expr)
const code_assumet & to_code_assume(const codet &code)
const codet & to_code(const exprt &expr)
const if_exprt & to_if_expr(const exprt &expr)
Cast an exprt to an if_exprt.
const let_exprt & to_let_expr(const exprt &expr)
Cast an exprt to a let_exprt.
const constant_exprt & to_constant_expr(const exprt &expr)
Cast an exprt to a constant_exprt.
const symbol_exprt & to_symbol_expr(const exprt &expr)
Cast an exprt to a symbol_exprt.
const typecast_exprt & to_typecast_expr(const exprt &expr)
Cast an exprt to a typecast_exprt.
const union_exprt & to_union_expr(const exprt &expr)
Cast an exprt to a union_exprt.
const minus_exprt & to_minus_expr(const exprt &expr)
Cast an exprt to a minus_exprt.
const with_exprt & to_with_expr(const exprt &expr)
Cast an exprt to a with_exprt.
const binary_exprt & to_binary_expr(const exprt &expr)
Cast an exprt to a binary_exprt.
const array_of_exprt & to_array_of_expr(const exprt &expr)
Cast an exprt to an array_of_exprt.
const member_exprt & to_member_expr(const exprt &expr)
Cast an exprt to a member_exprt.
const index_exprt & to_index_expr(const exprt &expr)
Cast an exprt to an index_exprt.
const struct_typet & to_struct_type(const typet &type)
Cast a typet to a struct_typet.
const code_typet & to_code_type(const typet &type)
Cast a typet to a code_typet.
const array_typet & to_array_type(const typet &type)
Cast a typet to an array_typet.
const struct_union_typet & to_struct_union_type(const typet &type)
Cast a typet to a struct_union_typet.
const struct_tag_typet & to_struct_tag_type(const typet &type)
Cast a typet to a struct_tag_typet.
std::string to_string(const string_not_contains_constraintt &expr)
Used for debug printing.
Represents a row of a value_sett.
static bool failed(bool error_indicator)
static std::string strip_first_field_from_suffix(const std::string &suffix, const std::string &field)
static bool suffix_starts_with_field(const std::string &suffix, const std::string &field)
Check if 'suffix' starts with 'field'.