The test `unroll-and-jam.ll` has the following issues:
- Some functions use `%i` and `%I` as variable names, which UTC fails to
distinguish, causing it to update the assertions incorrectly.
- Some tests use parameters for loop bounds, which means they will start
failing in the near future due to the ongoing changes in DA.
To address these issues, this patch updates the test as follows:
- Renames certain variables to avoid the naming conflict.
- For the tests that will be affected by the DA changes, adds variants
with constant loop bounds.
46b6c9744f