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...> is a reasonable start). As you said, how could construct a new ConstantArray? Is it like Constant *pC = new Constant(SBtype); // Constant(const Type *Ty) for ConstantArray, replaceUsesOfWithOnConstant(Value *From, Value *To, bool DisableChecking = false); this API replaceUsesOfWithOnConstant seems to be able to do what I want, but how could create/construct a new Value with my owner value? for 3,4,5, those should work well. I would really appreciated if you can give me a very simple example to show me how to do it. > 3. Chan...