| commit | 15a16def6e70c8f7df1023da80ceb89887203b40 | [log] [tgz] |
|---|---|---|
| author | Evan Cheng <evan.cheng@apple.com> | Thu May 20 06:13:19 2010 +0000 |
| committer | Evan Cheng <evan.cheng@apple.com> | Thu May 20 06:13:19 2010 +0000 |
| tree | 8c2637a4d2816e5442916d246406ee41dfb3ced0 | |
| parent | 761fd4c1d97977c16de9f0cf921056a37b906304 [diff] |
Add a hybrid bottom up scheduler that reduce register usage while avoiding pipeline stall. It's useful for targets like ARM cortex-a8. NEON has a lot of long latency instructions so a strict register pressure reduction scheduler does not work well. Early experiments show this speeds up some NEON loops by over 30%. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104216 91177308-0d34-0410-b5e6-96231b3b80d8