Implement Method::verified_entry and Method::verified_value_ro_entry for C1-compiled methods. This will take multiple steps.

For this step, support the passing of scalarized oop parameters. E.g.,

inline class V {
    Object x = null, y = null;
}

class Test {
    static void test(V v1, V v2) {...}
}

When C2 calls Test.test, it scalarizes the outgoing parameters to

     param0 = v1.x
     param1 = v1.y
     param2 = v2.x
     param3 = v2.y

If the method is compiled by C1, it expects the incoming parameters to be

    param0 = v1
    param1 = v2

So we need to shuffle the parameters like

     V tmp = new V();
     tmp.x = param0; // GC barrier!
     tmp.y = param1; // GC barrier!
     param0 = tmp;
     tmp = new V();
     tmp.x = param2; // GC barrier!
     tmp.y = param3; // GC barrier!
     param1 = tmp;

Note that GC barrier operations need to be applied when the oop fields of the tmp object are modified.