@Override
    public void visitMethodInsn(final int opcode, final String owner,
            final String name, final String desc, final boolean itf) {
        lastCodeOffset = code.length;
        Item i = cw.newMethodItem(owner, name, desc, itf);
        int argSize = i.intVal;
        // Label currentBlock = this.currentBlock;
        if (currentBlock != null) {
            if (compute == FRAMES) {
                currentBlock.frame.execute(opcode, 0, cw, i);
            } else {
                /*
                 * computes the stack size variation. In order not to recompute
                 * several times this variation for the same Item, we use the
                 * intVal field of this item to store this variation, once it
                 * has been computed. More precisely this intVal field stores
                 * the sizes of the arguments and of the return value
                 * corresponding to desc.
                 */
                if (argSize == 0) {
                    // the above sizes have not been computed yet,
                    // so we compute them...
                    argSize = Type.getArgumentsAndReturnSizes(desc);
                    // ... and we save them in order
                    // not to recompute them in the future
                    i.intVal = argSize;
                }
                int size;
                if (opcode == Opcodes.INVOKESTATIC) {
                    size = stackSize - (argSize >> 2) + (argSize & 0x03) + 1;
                } else {
                    size = stackSize - (argSize >> 2) + (argSize & 0x03);
                }
                // updates current and max stack sizes
                if (size > maxStackSize) {
                    maxStackSize = size;
                }
                stackSize = size;
            }
        }
        // adds the instruction to the bytecode of the method
        if (opcode == Opcodes.INVOKEINTERFACE) {
            if (argSize == 0) {
                argSize = Type.getArgumentsAndReturnSizes(desc);
                i.intVal = argSize;
            }
            code.put12(Opcodes.INVOKEINTERFACE, i.index).put11(argSize >> 2, 0);
        } else {
            code.put12(opcode, i.index);
        }
    }