diff options
| author | Craig Topper <craig.topper@intel.com> | 2019-03-27 06:07:05 +0000 |
|---|---|---|
| committer | Craig Topper <craig.topper@intel.com> | 2019-03-27 06:07:05 +0000 |
| commit | feadc2a1de82b9c1358b6f14072bcf9a9a89a188 (patch) | |
| tree | 26003897782747867fade4fb3684f731aab3332a /lldb/source/Plugins/ScriptInterpreter/Python/PythonDataObjects.cpp | |
| parent | 7da7b97487a6be012bb367605a6ce1d554056a88 (diff) | |
[X86] Add test cases for missed opportunities in (x << C1) op C2 to (x op (C2>>C1)) << C1 transform.
We handle the case where the C2 does not fit in a signed 32-bit immediate, but
(C2>>C1) does. But there's also some 64-bit opportunities when C2 is not an unsigned
32-bit immediate, but (C2>>C1) is. For OR/XOR this allows us to load the
immediate with with MOV32ri instead of a movabsq. For AND it allows us to use a
32-bit AND and fold the immediate.
llvm-svn: 357050
Diffstat (limited to 'lldb/source/Plugins/ScriptInterpreter/Python/PythonDataObjects.cpp')
0 files changed, 0 insertions, 0 deletions