[llvm] 42d9901 - NFC: Add a comment indicating UpdateAnalysisInformation invalidates DFS Numbering (#91252)

[via llvm-commits]

Author: AdityaK
Date: 2024-05-08T11:03:46-07:00
New Revision: 42d99013bd6b7ed4a085e39c94ab86938d633f8a

URL: https://github.com/llvm/llvm-project/commit/42d99013bd6b7ed4a085e39c94ab86938d633f8a
DIFF: https://github.com/llvm/llvm-project/commit/42d99013bd6b7ed4a085e39c94ab86938d633f8a.diff

LOG: NFC: Add a comment indicating UpdateAnalysisInformation invalidates DFS Numbering (#91252)

Added: 
    

Modified: 
    llvm/lib/Transforms/Utils/BasicBlockUtils.cpp

Removed: 
    


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diff  --git a/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp b/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp
index b9ed077b660d..462283c0bfe0 100644
--- a/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp
+++ b/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp
@@ -1141,6 +1141,7 @@ BasicBlock *llvm::splitBlockBefore(BasicBlock *Old, BasicBlock::iterator SplitPt
 }
 
 /// Update DominatorTree, LoopInfo, and LCCSA analysis information.
+/// Invalidates DFS Numbering when DTU or DT is provided.
 static void UpdateAnalysisInformation(BasicBlock *OldBB, BasicBlock *NewBB,
                                       ArrayRef<BasicBlock *> Preds,
                                       DomTreeUpdater *DTU, DominatorTree *DT,