goto_programt::targett add_return_assignment(goto_programt &body,
goto_programt::targett pos, const irep_idt &func_id, const exprt &value)
{
const source_locationt &loc=pos->source_location;
pos=body.insert_after(pos);
pos->make_assignment();
pos->source_location=loc;
pos->code=code_assignt(get_ret_val_var(func_id, value.type()), value);
return pos;
}
void remove_return(goto_programt &body, const goto_programt::targett pos)
{
code_function_callt &call=to_code_function_call(pos->code);
const irep_idt &id=to_symbol_expr(call.function()).get_identifier();
const typet &type=call.lhs().type();
const source_locationt &loc=pos->source_location;
const irep_idt &func=pos->function;
const goto_programt::targett assign=body.insert_after(pos);
assign->make_assignment();
assign->source_location=loc;
assign->code=code_assignt(call.lhs(), get_ret_val_var(id, type));
assign->function=func;
call.lhs().make_nil();
}