| commit | 2210c0bea83aa8a8585d793a1f63e8c01b65be38 | [log] [tgz] |
|---|---|---|
| author | Dan Gohman <gohman@apple.com> | Wed Nov 11 19:48:59 2009 +0000 |
| committer | Dan Gohman <gohman@apple.com> | Wed Nov 11 19:48:59 2009 +0000 |
| tree | b424f49eec4e671264bc206aef236dbb369e08aa | |
| parent | 3e20475feebca3bfb29375ac7f3e5acbeb2a95c8 [diff] |
Add support for tail duplication to BranchFolding, and extend tail merging support to handle more cases. - Recognize several cases where tail merging is beneficial even when the tail size is smaller than the generic threshold. - Make use of MachineInstrDesc::isBarrier to help detect non-fallthrough blocks. - Check for and avoid disrupting fall-through edges in more cases. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86871 91177308-0d34-0410-b5e6-96231b3b80d8