[llvm] Make RAUW skip instances where operand is the replacement node (PR #212724)

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git-clang-format --diff origin/main HEAD --extensions cpp -- llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp --diff_from_common_commit
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``````````diff
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index b771117f9..3db136ff2 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -13307,10 +13307,11 @@ void SelectionDAG::ReplaceAllUsesOfValueWith(SDValue From, SDValue To){
   RAUWUpdateListener Listener(*this, UI, UE);
   while (UI != UE) {
     SDNode *User = UI->getUser();
-    
+
     // Don't replace uses of the To node if is is self-referential.
     // If CSE tries to merge the Use with another node post-replacement
-    // it'll try to remove the same node from the CSE map twice, causing a crash.
+    // it'll try to remove the same node from the CSE map twice, causing a
+    // crash.
     if (User == To.getNode()) {
       do {
         ++UI;
@@ -13318,7 +13319,6 @@ void SelectionDAG::ReplaceAllUsesOfValueWith(SDValue From, SDValue To){
       continue;
     }
 
-
     bool UserRemovedFromCSEMaps = false;
 
     // A user can appear in a use list multiple times, and when this

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https://github.com/llvm/llvm-project/pull/212724