| commit | ff26ab227713afdd6f54f1b539df10cbe8f481e5 | [log] [tgz] |
|---|---|---|
| author | Chris Lattner <sabre@nondot.org> | Tue Dec 25 19:06:45 2007 +0000 |
| committer | Chris Lattner <sabre@nondot.org> | Tue Dec 25 19:06:45 2007 +0000 |
| tree | fc552e93b7d7b280967d345e72af17096edfbca7 | |
| parent | dc32d19c1c8f976e078784da09df1095077738d7 [diff] |
Don't break critical edges for single-bb loops, this helps with PR1877, though it is only a partial fix. This change is noise for most programs, but speeds up Shootout-C++/matrix by 20%, Ptrdist/ks by 24%, smg2000 by 8%, hexxagon by 9%, bzip2 by 9% (not sure I trust this), ackerman by 13%, etc. OTOH, it slows down Shootout/fib2 by 40% (I'll update PR1877 with this info). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45354 91177308-0d34-0410-b5e6-96231b3b80d8