[llvm] [VectorCombine] Add a cost model for shuffleToIdentity. (PR #93937)

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git-clang-format --diff 6e975ecf5c93c40d2f088425548eb6476332629c 8dfc683267858f6f2ff3f384245be2b7e9ff576f -- 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 8b94e6653f..0d0337bfd4 100644
--- a/llvm/lib/Transforms/Vectorize/VectorCombine.cpp
+++ b/llvm/lib/Transforms/Vectorize/VectorCombine.cpp
@@ -1739,9 +1739,9 @@ static Value *generateNewInstTree(ArrayRef<InstLane> Item, FixedVectorType *Ty,
       Ops[Idx] = II->getOperand(Idx);
       continue;
     }
-    Ops[Idx] =
-        generateNewInstTree(generateInstLaneVectorFromOperand(Item, Idx, nullptr),
-                            Ty, IdentityLeafs, SplatLeafs, Builder);
+    Ops[Idx] = generateNewInstTree(
+        generateInstLaneVectorFromOperand(Item, Idx, nullptr), Ty,
+        IdentityLeafs, SplatLeafs, Builder);
   }
   Builder.SetInsertPoint(I);
   Type *DstTy =

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https://github.com/llvm/llvm-project/pull/93937