Questions about some logic in the source code

[pjqwudi]

https://github.com/umnsec/mlta/blob/acb8f4ca60cbae108f077202985c059f40391bc4/src/lib/MLTA.cc#L490C1-L496C7
First of all, I would like to express my respect for your work. In the process of reading the source code of mlta, I have some questions here.
The logic of this part seems to be to process the callback function type. Should the first parameter of confineTargetFunction here be the storage address of StoreInst, rather than the entire instruction?