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| author | Noah Goldstein <goldstein.w.n@gmail.com> | 2023-02-06 12:04:34 -0600 |
|---|---|---|
| committer | Noah Goldstein <goldstein.w.n@gmail.com> | 2023-02-06 14:09:17 -0600 |
| commit | 3857d9decc4db2a0f14fd7cb7cd69be55f12cc4a (patch) | |
| tree | f0e2984e845a1373ec7bbaae28c930c33ae6f26e /lldb/source/Plugins/ScriptInterpreter/Python/lldb-python.h | |
| parent | cf8fadcf9b9362bff30e31cce06b516aa1156ce1 (diff) | |
| download | llvm-3857d9decc4db2a0f14fd7cb7cd69be55f12cc4a.zip llvm-3857d9decc4db2a0f14fd7cb7cd69be55f12cc4a.tar.gz llvm-3857d9decc4db2a0f14fd7cb7cd69be55f12cc4a.tar.bz2 | |
Search through associative operators for BMI patterns (BLSI, BLSR, BLSMSK)
(a & (-b)) & b is often lowered as:
%sub = sub i32 0, %b
%and0 = and i32 %sub, %a
%and1 = and i32 %and0, %b
Which won't get detected by the BLSI pattern as b & -b are never in
the same SDNode.
This patch will do a small search through associative operators and try
and place BMI patterns in the same node so they will hit the pattern.
Reviewed By: pengfei
Differential Revision: https://reviews.llvm.org/D141179
Diffstat (limited to 'lldb/source/Plugins/ScriptInterpreter/Python/lldb-python.h')
0 files changed, 0 insertions, 0 deletions