Nadav Rotem 52f5279653 Add support for reverse pointer induction variables. These are loops that contain pointers that count backwards.
For example, this is the hot loop in BZIP:

  do {
    m = *--p;
    *p = ( ... );
  } while (--n);

llvm-svn: 173219
2013-01-23 01:35:00 +00:00
..
2012-11-16 20:51:32 +00:00