Stack: ..., word2, word1 -> ..., word2, word1, word2, word1
super(com.sun.org.apache.bcel.internal.Constants.DUP2);
Call corresponding visitor method(s). The order is: Call visitor methods of implemented interfaces first, then call methods according to the class hierarchy in descending order, i.e., the most specific visitXXX() call comes last.paramv Visitor object v.visitStackProducer(this); v.visitPushInstruction(this); v.visitStackInstruction(this); v.visitDUP2(this);
v.visitStackProducer(this); v.visitPushInstruction(this); v.visitStackInstruction(this); v.visitDUP2(this);