return MOVE_FOLDED;
return DefUseEffect.MOVE_FOLDED;
  private static byte booleanCmpAddr(OPT_Instruction s) {   if (CF_ADDR) {      OPT_Operand op1 = BooleanCmp.getVal1(s);      OPT_Operand op2 = BooleanCmp.getVal2(s);      if (op1.isConstant()) {        if (op2.isConstant()) {          // BOTH CONSTANTS: FOLD          int cond = BooleanCmp.getCond(s).evaluate(op1, op2);          if (cond != OPT_ConditionOperand.UNKNOWN) {            Move.mutate(s, REF_MOVE, BooleanCmp.getResult(s),                         (cond == OPT_ConditionOperand.TRUE) ? IC(1):IC(0));            return MOVE_FOLDED;          }        } else {          // Canonicalize by switching operands and fliping code.          OPT_Operand tmp = BooleanCmp.getClearVal1(s);          BooleanCmp.setVal1(s, BooleanCmp.getClearVal2(s));          BooleanCmp.setVal2(s, tmp);          BooleanCmp.getCond(s).flipOperands();        }      }    }    return UNCHANGED;  }