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| author | Chris Lattner <sabre@nondot.org> | 2005-05-08 17:34:56 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2005-05-08 17:34:56 +0000 |
| commit | 120347e8d115cf40aed10e63d406713b46f327df (patch) | |
| tree | ecc3069a9f0eb1fa6d2b4cd8f64779994478c2f2 /lib/Transforms/Scalar/DCE.cpp | |
| parent | a9c83c73daa8eb5410ff17be9b19218245b52de2 (diff) | |
| download | llvm-120347e8d115cf40aed10e63d406713b46f327df.tar.gz llvm-120347e8d115cf40aed10e63d406713b46f327df.tar.bz2 llvm-120347e8d115cf40aed10e63d406713b46f327df.tar.xz | |
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
Diffstat (limited to 'lib/Transforms/Scalar/DCE.cpp')
0 files changed, 0 insertions, 0 deletions