| commit | f12a12cd25602e8447aeb3d49313bed3f29a2c68 | [log] [tgz] |
|---|---|---|
| author | Matt Arsenault <Matthew.Arsenault@amd.com> | Mon Jan 11 17:02:00 2016 +0000 |
| committer | Matt Arsenault <Matthew.Arsenault@amd.com> | Mon Jan 11 17:02:00 2016 +0000 |
| tree | bf0dc08903860e70ad7c04d52fcd3da70e617520 | |
| parent | d9ff2aaafdd3572f02848cd21d08c5d1c279ca33 [diff] |
AMDGPU: Pattern match ffbh pattern to instruction. The hardware instruction's output on 0 is -1 rather than 32. Eliminate a test and select to -1. This removes an extra instruction from the compatability function with HSAIL's firstbit instruction. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@257352 91177308-0d34-0410-b5e6-96231b3b80d8