| commit | 80b09fe8bc1d2755ef9a6b03b8862a657db42f06 | [log] [tgz] |
|---|---|---|
| author | Evan Cheng <evan.cheng@apple.com> | Thu Apr 10 02:32:10 2008 +0000 |
| committer | Evan Cheng <evan.cheng@apple.com> | Thu Apr 10 02:32:10 2008 +0000 |
| tree | cf8afab9e8ba4762f875e03061b01171fb14d749 | |
| parent | 0c1963099f350415a2d091ace8ff5f61b8592910 [diff] |
Teach branch folding pass about implicit_def instructions. Unfortunately we can't just eliminate them since register scavenger expects every register use to be defined. However, we can delete them when there are no intra-block uses. Carefully removing some implicit def's which enable more blocks to be optimized away. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49461 91177308-0d34-0410-b5e6-96231b3b80d8