private Varnode simplifyVarnode(Varnode vn, AddressFactory addrFactory)
			throws CancelledException {
		if (!(vn instanceof VarnodeOperation)) {
			return vn;
		}
		VarnodeOperation vop = (VarnodeOperation) vn;
		return ResultsState.simplify(vop.getPCodeOp(), vop.getInputValues(), addrFactory,
			TaskMonitor.DUMMY);
	}
Create locals and parameters based on references involving purely the stack pointer.
Pushes, Pops, and arithmetic manipulation of the stack pointer must be tracked.

@param func - function to analyze stack pointer references
Ghidra/Features/Base/src/main/java/ghidra/app/cmd/function/FunctionResultStateStackAnalysisCmd.java