[llvm] [DAGCombiner] Fold pattern for srl-shl-zext (PR #138290)
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Tue May 6 11:52:59 PDT 2025
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<!--LLVM CODE FORMAT COMMENT: {clang-format}-->
:warning: C/C++ code formatter, clang-format found issues in your code. :warning:
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You can test this locally with the following command:
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``````````bash
git-clang-format --diff HEAD~1 HEAD --extensions cpp -- llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
``````````
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<details>
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index b1b5c5335..8469b2952 100644
--- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -10994,10 +10994,9 @@ SDValue DAGCombiner::visitSRL(SDNode *N) {
ZExt.getValueType().getScalarSizeInBits() -
ZExt.getOperand(0).getValueType().getScalarSizeInBits();
if (N1C->getZExtValue() <= NumLeadingZeros) {
- return DAG.getNode(
- N0.getOpcode(), SDLoc(N0), VT,
- DAG.getNode(ISD::SRL, SDLoc(N0), VT, Other, N1),
- ZExt);
+ return DAG.getNode(N0.getOpcode(), SDLoc(N0), VT,
+ DAG.getNode(ISD::SRL, SDLoc(N0), VT, Other, N1),
+ ZExt);
}
}
}
``````````
</details>
https://github.com/llvm/llvm-project/pull/138290
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