[cfe-dev] How to check if a variable is updated inside a loop?

[Min-Yih Hsu via cfe-dev]

If you only want to see if a specific instruction is part of a loop, `llvm::Loop` can give you a list of enclosing basic blocks.
Also, I believe this question is more suitable in the llvm-dev mailing list (Cc-ed)

-Min

> On Dec 23, 2021, at 4:35 AM, karan raj singh ranawat via cfe-dev <cfe-dev at lists.llvm.org> wrote:
> 
> 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.
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