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/* $Id$
*
* Call: Call a subroutine (intermediate opcode).
*
* Copyright (C) 2008-2009 FAUmachine Team <info@faumachine.org>.
* This program is free software. You can redistribute it and/or modify it
* under the terms of the GNU General Public License, either version 2 of
* the License, or (at your option) any later version. See COPYING.
*/
#ifndef __CALL_HPP_INCLUDED
#define __CALL_HPP_INCLUDED
#include "intermediate/opcodes/OpCode.hpp"
#include "intermediate/operands/Reference.hpp"
namespace intermediate {
//! call given subprogram
/** This class will call a given subprogram.
* The destination of a call must be the name of a code container. This code
* container must be in the same nesting level as the current code container,
* or above the current code container.
*
* Read operands: target (pointer referencing the target code container)
* Write operands: implicit stack pointer, stack,
* implicit instruction pointer
*
* Operation:
* push instruction pointer
* push target stack segment to stack
* instruction pointer = target
*/
class Call : public OpCode {
public:
//! c'tor
/** @param target called subprogram
*/
Call(Reference *destination) : dst(destination) {}
//! Accept a Visitor.
/** All intermediate code nodes need to implement this method.
*
* @param v the Visitor that can visit this node.
*/
virtual void accept(Visitor& v) {
v.visit(*this);
}
//! target (name) of the subprogram.
Reference *dst;
protected:
virtual ~Call() {
util::MiscUtil::terminate(this->dst);
}
};
}; /* namespace intermediate */
#endif /* __CALL_HPP_INCLUDED */
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