fix: create 2 kinds of constructor for instantiation and instantiation of inherited types

[HerrCai0907]

create 2 kinds constructor can help binaryen to optimize code better. since binaryen cannot optimize conditional allocation in base class. It will be obvious for ~lib/object/Object because it is the base class for all kinds of class.

[HerrCai0907]

similar but more complex constructor in C++: https://discourse.llvm.org/t/why-two-variants-of-every-constructor-are-created-by-the-compiler/73255

[CountBleck]

Uh, what's the difference between the raw constructor and the normal constructor?

[HerrCai0907]

The raw constructor will not allocate memory, it is used for inherited class's constuctor.

[CountBleck]

I don't think I can say much besides that it looks really strange...is there a way to have the normal constructor just call the "raw" constructor, instead of creating two distinct types of constructors?

[HerrCai0907]

It introduce more complexity when @inline is set. Since inlined constructor should inline to the caller site. It lets inline meaningless if we just call "raw_constructor" in normal constructor.