public AssignQuad(int address, IRBasicBlock block, int lhsIndex) { this(address, block, block.getVariables()[lhsIndex]);
public AssignQuad(int address, IRBasicBlock block, Variable lhs) { super(address, block); setLHS(lhs);
	public AssignQuad(int address, IRBasicBlock block, int lhsIndex) {		this(address, block, block.getVariables()[lhsIndex]);	}