How to check if a variable is updated inside a loop?

[karan_raj_singh_rana]

If there is a variable outside a loop, and if it is used inside a loop. How can I check in the LLVM analysis if the variable is getting modified inside a loop iteration.
Ex: int i = 0;
for(;;i++){}When there is i++, the load instruction updates existing i. How can I identify if the load instruction is part of a loop.