[llvm] [LoadStoreVectorizer] Fill gaps in load/store chains to enable vectorization (PR #159388)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp,h -- llvm/include/llvm/Analysis/TargetTransformInfo.h llvm/include/llvm/Analysis/TargetTransformInfoImpl.h llvm/lib/Analysis/TargetTransformInfo.cpp llvm/lib/Target/NVPTX/NVPTXTargetTransformInfo.h llvm/lib/Transforms/Vectorize/LoadStoreVectorizer.cpp
``````````

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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Transforms/Vectorize/LoadStoreVectorizer.cpp b/llvm/lib/Transforms/Vectorize/LoadStoreVectorizer.cpp
index 04f4e9282..d452e1609 100644
--- a/llvm/lib/Transforms/Vectorize/LoadStoreVectorizer.cpp
+++ b/llvm/lib/Transforms/Vectorize/LoadStoreVectorizer.cpp
@@ -930,9 +930,7 @@ std::vector<Chain> Vectorizer::splitChainByAlignment(Chain &C) {
       }
 
       Chain ExtendingLoadsStores;
-      bool ExtendChain = IsLoadChain
-                             ? ExtendLoads
-                             : ExtendStores;
+      bool ExtendChain = IsLoadChain ? ExtendLoads : ExtendStores;
       if (ExtendChain && NumVecElems < TargetVF && NumVecElems % 2 != 0 &&
           VecElemBits >= 8) {
         // TargetVF may be a lot higher than NumVecElems,
@@ -1047,8 +1045,8 @@ bool Vectorizer::vectorizeChain(Chain &C) {
 
   // If we are left with a two-element chain, and one of the elements is an
   // extra element, we don't want to vectorize
-  if (C.size() == 2 && (ExtraElements.contains(C[0].Inst) ||
-                        ExtraElements.contains(C[1].Inst)))
+  if (C.size() == 2 &&
+      (ExtraElements.contains(C[0].Inst) || ExtraElements.contains(C[1].Inst)))
     return false;
 
   sortChainInOffsetOrder(C);

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https://github.com/llvm/llvm-project/pull/159388