The case when the length of PCS is 0 means that we reached an area for
which line info is not available. In such case, we return LOOP_START,
which was the lowest instruction address that had line info. */
The case when the length of PCS is 0 means that we reached an area for
which line info is not available. In such case, we return LOOP_START,
which was the lowest instruction address that had line info. */