google/souper — pull request #49 by rsas (2014-09-09 21:34:50+00:00)
Title: Don't create SExt insts of equal width

Currently, souper still generates ```sext``` instructions as follows:

```%7:i64 = sext 0:i64```

Consequently, souper parser doesn't pass the sanity checks when parsing such instructions. The proposed patch eliminates the creation of such instructions. Is a test case necessary in this case?