Variable[] vars = startBlock.getVariables(); int nvars = vars.length; renumberArray = new SSAStack[nvars];  for (int i=0; i<nvars; i+=1) { Variable vi = vars[i]; SSAStack st = getStack(vi); if (vi instanceof MethodArgument) { st.getNewVariable(); } }
	public void constructSSA() {		placePhiFunctions();		renameVariables(startBlock);	}