[llvm] [SLP]Improve costs in computeExtractCost() to avoid crash after D158449. (PR #67142)

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git-clang-format --diff a9ea11b694c17a5f94077036f8bb5d21ea922863 90ad249849cc0e527cfcbfb56310b5b7288f17dd -- llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
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View the diff from clang-format here.
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diff --git a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
index 847796512579..1e0818a4279e 100644
--- a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
+++ b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
@@ -7138,7 +7138,7 @@ class BoUpSLP::ShuffleCostEstimator : public BaseShuffleAnalysis {
             CurrentIdx % EltsPerVector + EltsPerVector;
       } else {
         IsIdentity &= PrevIdx == CurrentIdx &&
-                          CurrentIdx % EltsPerVector == Idx % EltsPerVector;
+                      CurrentIdx % EltsPerVector == Idx % EltsPerVector;
         RegMask[Idx % EltsPerVector] = CurrentIdx % EltsPerVector;
       }
 

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https://github.com/llvm/llvm-project/pull/67142