Re: RFA: MEP: Fix use of delete_insn.

[DJ Delorie]

We have this at the top of the loop, so I don't think it matters:

          next = NEXT_INSN (insn);
          if (GET_CODE (insn) != INSN)
            continue;

However, I think an insn will be skipped if we use NEXT.  Perhaps we
want PREV?  Or the loop might need to be altered to account for this
potential skipping.