Examples of serp.bytecode.Code.xload()

serp.bytecode.Code.xload()
Load a local variable onto the stack. This instruction will result in a nop until its type and local index are set.


        // ##### test case: B extends A. Methods defined in A. What
        // ##### happens?
        // super.setXXX(...)
        code.aload().setThis();
        code.xload().setParam(0).setType(propType);
        code.invokespecial().setMethod(_managedType.getType(),
            setterName, void.class, new Class[] { propType });


        code.vreturn();
        code.calculateMaxLocals();

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        // if (inst.pcStateManager == null) inst.<field> = value;
        loadManagedInstance(code, true);
        code.getfield().setField(SM, SMTYPE);
        JumpInstruction ifins = code.ifnonnull();
        loadManagedInstance(code, true);
        code.xload().setParam(firstParamOffset);
        addSetManagedValueCode(code, fmd);
        code.vreturn();


        // inst.pcStateManager.setting<fieldType>Field (inst,
        //     pcInheritedFieldCount + <index>, inst.<field>, value, 0);

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        code.getstatic().setField(INHERIT, int.class);
        code.constant().setValue(index);
        code.iadd();
        loadManagedInstance(code, true);
        addGetManagedValueCode(code, fmd);
        code.xload().setParam(firstParamOffset);
        code.constant().setValue(0);
        code.invokeinterface().setMethod(getStateManagerMethod
            (fmd.getDeclaredType(), "setting", false, true));
        code.vreturn();

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        m.makePublic();
        Code code = m.getCode(true);


        code.aload().setThis();
        for (int i = 1; i < params.length; i++)
            code.xload().setParam(i - 1).setType(params[i]);
        code.invokestatic().setMethod(helper);
        code.xreturn().setType(meth.getReturnType());


        code.calculateMaxStack();
        code.calculateMaxLocals();

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        // invoke before
        int beforeRet = -1;
        if (before != null) {
            code.aload().setThis();
            for (int i = 1; i < params.length; i++)
                code.xload().setParam(i - 1).setType(params[i]);
            code.invokestatic().setMethod(before);
            if (after != null && before.getReturnType() != void.class) {
                beforeRet = code.getNextLocalsIndex();
                code.xstore().setLocal(beforeRet).
                    setType(before.getReturnType());

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        }


        // invoke super
        code.aload().setThis();
        for (int i = 1; i < params.length; i++)
            code.xload().setParam(i - 1).setType(params[i]);
        code.invokespecial().setMethod(type, meth.getName(), 
            meth.getReturnType(), meth.getParameterTypes());


        // invoke after 
        if (after != null) {

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                ret = code.getNextLocalsIndex();
                code.xstore().setLocal(ret).setType(meth.getReturnType());
            }
            code.aload().setThis();
            for (int i = 1; i < params.length; i++)
                code.xload().setParam(i - 1).setType(params[i]);
            if (ret != -1)
                code.xload().setLocal(ret).setType(meth.getReturnType());
            if (beforeRet != -1)
                code.xload().setLocal(beforeRet).
                    setType(before.getReturnType());

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            }
            code.aload().setThis();
            for (int i = 1; i < params.length; i++)
                code.xload().setParam(i - 1).setType(params[i]);
            if (ret != -1)
                code.xload().setLocal(ret).setType(meth.getReturnType());
            if (beforeRet != -1)
                code.xload().setLocal(beforeRet).
                    setType(before.getReturnType());
            code.invokestatic().setMethod(after);
        }

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            for (int i = 1; i < params.length; i++)
                code.xload().setParam(i - 1).setType(params[i]);
            if (ret != -1)
                code.xload().setLocal(ret).setType(meth.getReturnType());
            if (beforeRet != -1)
                code.xload().setLocal(beforeRet).
                    setType(before.getReturnType());
            code.invokestatic().setMethod(after);
        }
        code.xreturn().setType(meth.getReturnType());

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        code.constant().setValue(true);
        code.invokestatic().setMethod(Proxies.class, "dirty", void.class,
            new Class[] { Proxy.class, boolean.class });
        code.aload().setThis();
        for (int i = 0; i < params.length; i++)
            code.xload().setParam(i).setType(params[i]);
        code.invokespecial().setMethod(type, meth.getName(), ret, params);
        code.xreturn().setType(ret);
        code.calculateMaxStack();
        code.calculateMaxLocals();
    }

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