[llvm] [SimplifyCFG] Skip phi scans when folded block shares no predecessors (PR #225647)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- llvm/lib/Transforms/Utils/Local.cpp --diff_from_common_commit
``````````

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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Transforms/Utils/Local.cpp b/llvm/lib/Transforms/Utils/Local.cpp
index 4221d591f..2b0b03f8a 100644
--- a/llvm/lib/Transforms/Utils/Local.cpp
+++ b/llvm/lib/Transforms/Utils/Local.cpp
@@ -1083,8 +1083,7 @@ static void redirectValuesFromPredecessorsToPhi(BasicBlock *BB,
                                                 PHINode *PN,
                                                 BasicBlock *CommonPred,
                                                 bool HasSharedPreds) {
-  assert((HasSharedPreds || !CommonPred) &&
-         "Unexpected CommonPred!");
+  assert((HasSharedPreds || !CommonPred) && "Unexpected CommonPred!");
   Value *OldVal = PN->removeIncomingValue(BB, false);
   assert(OldVal && "No entry in PHI for Pred BB!");
 

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https://github.com/llvm/llvm-project/pull/225647