[llvm] [VectorCombine] foldShuffleOfShuffles - fold "shuffle (shuffle x, undef), (shuffle y, undef)" -> "shuffle x, y" (PR #88743)

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git-clang-format --diff 105dcc882cf0152baeaa02ac0e50e2527b6940db aed7024246cbe7ff031a763d9d3d6aa34f4b3472 -- llvm/lib/Transforms/Vectorize/VectorCombine.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Transforms/Vectorize/VectorCombine.cpp b/llvm/lib/Transforms/Vectorize/VectorCombine.cpp
index bfc23f0b1f..5c76fd58c8 100644
--- a/llvm/lib/Transforms/Vectorize/VectorCombine.cpp
+++ b/llvm/lib/Transforms/Vectorize/VectorCombine.cpp
@@ -1615,7 +1615,7 @@ bool VectorCombine::foldShuffleOfShuffles(Instruction &I) {
   return true;
 }
 
-  /// Given a commutative reduction, the order of the input lanes does not alter
+/// Given a commutative reduction, the order of the input lanes does not alter
 /// the results. We can use this to remove certain shuffles feeding the
 /// reduction, removing the need to shuffle at all.
 bool VectorCombine::foldShuffleFromReductions(Instruction &I) {

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https://github.com/llvm/llvm-project/pull/88743