diff options
| author | Craig Topper <craig.topper@sifive.com> | 2024-06-25 15:55:09 -0700 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2024-06-25 15:55:09 -0700 |
| commit | 847235bbef153c6d805d415cea8494297eaf2bdb (patch) | |
| tree | d445fa6e315c9d505feea6184cceb2006133ba6e /lldb/source/Plugins/ScriptInterpreter/Python/ScriptInterpreterPython.cpp | |
| parent | e214ed9d7060f6caa0c1bb756edb62643f23aa5b (diff) | |
[RISCV] Add DAG combine to turn (sub (shl X, 8), X) into orc.b (#96680)
If only bits 8, 16, 24, 32, etc. can be non-zero.
This is what (mul X, 255) is decomposed to. This decomposition happens
early before RISC-V DAG combine runs.
This patch does not support types larger than XLen so i64 on rv32 fails
to generate 2 orc.b instructions. It might have worked if the mul hadn't
been decomposed before it was expanded.
Partial fix for #96595.
Diffstat (limited to 'lldb/source/Plugins/ScriptInterpreter/Python/ScriptInterpreterPython.cpp')
0 files changed, 0 insertions, 0 deletions