| commit | 120347e8d115cf40aed10e63d406713b46f327df | [log] [tgz] |
|---|---|---|
| author | Chris Lattner <sabre@nondot.org> | Sun May 08 17:34:56 2005 +0000 |
| committer | Chris Lattner <sabre@nondot.org> | Sun May 08 17:34:56 2005 +0000 |
| tree | ecc3069a9f0eb1fa6d2b4cd8f64779994478c2f2 | |
| parent | a9c83c73daa8eb5410ff17be9b19218245b52de2 [diff] |
Strength reduce SAR into SHR if there is no way sign bits could be shifted in. This tends to get cases like this: X = cast ubyte to int Y = shr int X, ... Tested by: shift.ll:test24 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21775 91177308-0d34-0410-b5e6-96231b3b80d8