_left.backPatchFalseList(ancestor.getLoopHandle()); // clears list
il.append(new GOTO(parent)); exit.setTarget(il.append(NOP)); _left.backPatchFalseList(_loop);
_left.backPatchFalseList(ancestor.getLoopHandle()); // clears list
il.append(new GOTO(parent)); exit.setTarget(il.append(NOP)); _left.backPatchFalseList(_loop);