[llvm] [DAG] Add SDPatternMatch::m_SetCC and update some combines to use it (PR #98646)

[via llvm-commits]

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``````````bash
git-clang-format --diff 05f987743170cbd9fc97699c7a9b352055de7300 8e863f7fd7ecef6d7b8f25525cb7f085e2d46d9d --extensions h,cpp -- llvm/include/llvm/CodeGen/SDPatternMatch.h 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 9185c0176d..5b696476ae 100644
--- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -2301,8 +2301,8 @@ static bool isTruncateOf(SelectionDAG &DAG, SDValue N, SDValue &Op,
   }
 
   if (N.getValueType().getScalarType() != MVT::i1 ||
-      !sd_match(N,
-                m_c_SetCC(m_Value(Op), m_Zero(), m_SpecificCondCode(ISD::SETNE))))
+      !sd_match(
+          N, m_c_SetCC(m_Value(Op), m_Zero(), m_SpecificCondCode(ISD::SETNE))))
     return false;
 
   Known = DAG.computeKnownBits(Op);

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https://github.com/llvm/llvm-project/pull/98646