if (g.getTarget().equals(next4) && (c1 == 1 && c2 == 0 || c1 == 0 && c2 == 1)) {
boolean nullIsTrue = i instanceof IFNULL && c2 == 1 || i instanceof IFNONNULL && c2 == 0;
if (nullIsTrue) {
// System.out.println("Found NULL2Z instruction");
head.swapInstruction(new NULL2Z());
} else {
// System.out.println("Found NONNULL2Z instruction");
head.swapInstruction(new NONNULL2Z());
}