[llvm] [TableGen] Support for optional chain in Selection DAG nodes (PR #163079)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp,h -- llvm/include/llvm/CodeGen/SDNodeInfo.h llvm/include/llvm/CodeGen/SelectionDAGISel.h llvm/include/llvm/CodeGen/SelectionDAGNodes.h llvm/lib/CodeGen/SelectionDAG/SDNodeInfo.cpp llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp llvm/utils/TableGen/Basic/SDNodeProperties.cpp llvm/utils/TableGen/Basic/SDNodeProperties.h llvm/utils/TableGen/Common/CodeGenDAGPatterns.cpp llvm/utils/TableGen/Common/DAGISelMatcher.cpp llvm/utils/TableGen/Common/DAGISelMatcher.h llvm/utils/TableGen/DAGISelMatcherEmitter.cpp llvm/utils/TableGen/DAGISelMatcherGen.cpp llvm/utils/TableGen/DAGISelMatcherOpt.cpp llvm/utils/TableGen/SDNodeInfoEmitter.cpp --diff_from_common_commit
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``````````diff
diff --git a/llvm/utils/TableGen/Basic/SDNodeProperties.cpp b/llvm/utils/TableGen/Basic/SDNodeProperties.cpp
index ba130fc2b..b16fce74c 100644
--- a/llvm/utils/TableGen/Basic/SDNodeProperties.cpp
+++ b/llvm/utils/TableGen/Basic/SDNodeProperties.cpp
@@ -42,7 +42,8 @@ unsigned llvm::parseSDPatternOperatorProperties(const Record *R) {
   if (Properties & (1 << SDNPHasChain) && Properties & (1 << SDNPOptChain))
     PrintFatalError(R->getLoc(),
                     "Properties 'SDNPHasChain' and 'SDNPOptChain' cannot be "
-                    "both specified on node '" + R->getName() + "'!");
+                    "both specified on node '" +
+                        R->getName() + "'!");
 
   return Properties;
 }

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https://github.com/llvm/llvm-project/pull/163079