[llvm] Matched some basic ISD::AVGFLOORU patterns (PR #84903)

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``````````bash
git-clang-format --diff ba13fa2a5d57581bff1a7e9322234af30f4882f6 cd98974c7e086153fe97ad93902b6bb5cd7d3367 -- llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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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 f6132e9627..c721db178a 100644
--- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -2840,7 +2840,7 @@ static SDValue combineFixedwidthToAVG(SDNode *N, SelectionDAG &DAG) {
   SDValue And2 = And.getOperand(1);
   SDValue Xor1 = Xor.getOperand(0);
   SDValue Xor2 = Xor.getOperand(1);
-  if(Xor1 != And1 && Xor2 != And2)
+  if (Xor1 != And1 && Xor2 != And2)
     return SDValue();
   // Is the right shift using an immediate value of 1?
   ConstantSDNode *N1C = isConstOrConstSplat(Lshr.getOperand(1));

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https://github.com/llvm/llvm-project/pull/84903