void DismantleStructuredReturns::do_file_set_block( FileSetBlock* file_set_block ) {
suif_map<CProcedureType *,QualifiedType *> type_map;
list<ArrayReferenceExpression*> ref_exprs;
SuifEnv *env = 0;
TypeBuilder *tb = 0;
VoidType *vt = 0;
for (Iter<ProcedureSymbol> iter =
object_iterator<ProcedureSymbol>(file_set_block);
iter.is_valid();
iter.next()) {
ProcedureSymbol *sym = &iter.current();
Type *type = sym->get_type();
if (!is_kind_of<CProcedureType>(type))
continue;
CProcedureType *cp_type = to<CProcedureType>(type);
type = cp_type->get_result_type();
if (!env) {
env = type->get_suif_env();
tb = (TypeBuilder*)
env->get_object_factory(TypeBuilder::get_class_name());
vt = tb->get_void_type();
}
suif_map<CProcedureType *,QualifiedType *>::iterator t_iter = type_map.find(cp_type);
QualifiedType *qtype;
if (t_iter == type_map.end()) {
if (!is_kind_of<GroupType>(type) && !is_kind_of<ArrayType>(type))
continue;
qtype = tb->get_qualified_type(
tb->get_pointer_type(to<DataType>(type)));
cp_type->set_result_type(vt);
cp_type->insert_argument(0,qtype);
type_map.enter_value(cp_type,qtype);
}
else {
qtype = (*t_iter).second;
}
ProcedureDefinition *def = sym->get_definition();
if (!def)
continue;
ParameterSymbol *par = create_parameter_symbol(env,qtype);
def->get_symbol_table()->append_symbol_table_object(par);
def->insert_formal_parameter(0,par);
// Convert all returns into assigned and returns
for (Iter<ReturnStatement> ret_iter = object_iterator<ReturnStatement>(def->get_body());
ret_iter.is_valid();
ret_iter.next()) {
ReturnStatement *ret = &ret_iter.current();
Expression *retval = ret->get_return_value();
ret->set_return_value(0);
retval->set_parent(0);
insert_statement_before(ret,
create_store_statement(env,retval,create_var_use(par)));
}
}
// Change all calls to the new form
for (Iter<CallStatement> cs_iter =
object_iterator<CallStatement>(file_set_block);
cs_iter.is_valid();
cs_iter.next()) {
CallStatement *call = &cs_iter.current();
Type *type = call->get_callee_address()->get_result_type();
Type *p_type = tb->unqualify_type(to<PointerType>(type)->get_reference_type());
if (!is_kind_of<PointerType>(p_type))
continue;
p_type = tb->unqualify_type(to<PointerType>(p_type)->get_reference_type());
if (!is_kind_of<CProcedureType>(p_type))
continue;
CProcedureType *cp_type = to<CProcedureType>(p_type);
suif_map<CProcedureType *,QualifiedType *>::iterator t_iter = type_map.find(cp_type);
if (t_iter == type_map.end())
continue;
QualifiedType *qtype = (*t_iter).second;
DataType *var_type = to<DataType>(tb->unqualify_type(to<PointerType>(qtype->get_base_type())
->get_reference_type()));
VariableSymbol *var =
new_anonymous_variable(env,call,tb->get_qualified_type(var_type));
Expression *exp = create_symbol_address_expression(
env,
tb->get_pointer_type(var_type),
var);
call->insert_argument(0,exp);
call->set_destination(0);
}
for (Iter<CallExpression> ce_iter =
object_iterator<CallExpression>(file_set_block);
ce_iter.is_valid();
ce_iter.next()) {
CallExpression *call = &ce_iter.current();
Type *type = call->get_callee_address()->get_result_type();
Type *p_type = tb->unqualify_type(to<PointerType>(type)->get_reference_type());
if (!is_kind_of<PointerType>(p_type))
continue;
p_type = tb->unqualify_type(to<PointerType>(p_type)->get_reference_type());
if (!is_kind_of<CProcedureType>(p_type))
continue;
CProcedureType *cp_type = to<CProcedureType>(p_type);
;
suif_map<CProcedureType *,QualifiedType *>::iterator t_iter = type_map.find(cp_type);
if (t_iter == type_map.end())
continue;
QualifiedType *qtype = (*t_iter).second;
DataType *var_type = to<DataType>(tb->unqualify_type(to<PointerType>(qtype->get_base_type())
->get_reference_type()));
VariableSymbol *var =
new_anonymous_variable(env,call,tb->get_qualified_type(var_type));
Expression *exp = create_symbol_address_expression(
env,
tb->get_pointer_type(var_type),
var);
call->insert_argument(0,exp);
Statement *loc = get_expression_owner(call);
call->get_parent()->replace(call,create_var_use(var));
call->set_parent(0);
suif_assert(vt != 0);
call->set_result_type(vt);
EvalStatement *es = create_eval_statement(env);
insert_statement_before(loc,es);
// Would be better to turn this into a call statement
es->append_expression(call);
}
}
