LLVM IR instumentation. how to get the element value the pointer arg is pointing to?
arguments, function, instrumentation, llvm
Solution
You want to
get the element/variable that pointer is pointing to
This is also called "dereferencing a pointer". This is not something you can do at compile time, but what you can do is insert an instruction which does the dereferencing - in other words, a `load` instruction.
Problem
I am trying to instrument LLVM IR call instruction. What I want to achieve is to get the arguments of a function call. If the argument is pointer type, then I want to get the element/variable that pointer is pointing to. I know that if I have the argument, I can use ``` getPointerElementType to get the type of element the pointer is pointing to. ``` But how to access the value of element?