[llvm] TableGen: Replace assertion with error for unexpected pattern inputs (PR #159687)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- llvm/utils/TableGen/Common/CodeGenDAGPatterns.cpp
``````````

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``````````diff
diff --git a/llvm/utils/TableGen/Common/CodeGenDAGPatterns.cpp b/llvm/utils/TableGen/Common/CodeGenDAGPatterns.cpp
index 22bcf7335..08cf6ca1b 100644
--- a/llvm/utils/TableGen/Common/CodeGenDAGPatterns.cpp
+++ b/llvm/utils/TableGen/Common/CodeGenDAGPatterns.cpp
@@ -2796,7 +2796,8 @@ bool TreePatternNode::ApplyTypeConstraints(TreePattern &TP, bool NotRegisters) {
   }
 
   if (!getOperator()->isSubClassOf("SDNodeXForm")) {
-    TP.error("unknown node type '" + getOperator()->getName() + " in input pattern");
+    TP.error("unknown node type '" + getOperator()->getName() +
+             " in input pattern");
     return false;
   }
 

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https://github.com/llvm/llvm-project/pull/159687