fill README file
-TBD
+LLVM's opt does not always enforce the unrolling options passed as cli arguments. Hence, we created our own exeutable with custom unrolling pass in examples/example_unrolling_service/loop_unroller that enforces the unrolling factors passed in its cli.
+
+To run the custom unroller:
+```
+bazel run //examples/example_unrolling_service/loop_unroller:loop_unroller -- <input>.ll -o <output>.ll --funroll-count=<num>
+```
