| commit | f148c66ce4c22130ff1ae242582e024ea18492bb | [log] [tgz] |
|---|---|---|
| author | Nadav Rotem <nrotem@apple.com> | Wed Jan 23 01:35:00 2013 +0000 |
| committer | Nadav Rotem <nrotem@apple.com> | Wed Jan 23 01:35:00 2013 +0000 |
| tree | eddde9b579b2159314db31c954a8a931ecce84e5 | |
| parent | 8246df61f6de716acf1f8c64fac3c19970a2c174 [diff] |
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);
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173219 91177308-0d34-0410-b5e6-96231b3b80d8