[llvm] [LoadStoreVectorizer] Support vectorization of mixed-type contiguous accesses (PR #177908)

[Drew Kersnar via llvm-commits]

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@@ -154,13 +149,58 @@ using EqClassKey =
 //  - BB order, sorted by Instr->comesBefore.
 //  - Offset order, sorted by OffsetFromLeader.
 // This pass switches back and forth between these orders.
+class Vectorizer;
+
 struct ChainElem {
   Instruction *Inst;
   APInt OffsetFromLeader;
   ChainElem(Instruction *Inst, APInt OffsetFromLeader)
       : Inst(std::move(Inst)), OffsetFromLeader(std::move(OffsetFromLeader)) {}
 };
-using Chain = SmallVector<ChainElem, 1>;
+struct Chain : SmallVector<ChainElem, 1> {
+  friend class Vectorizer;
+
+private:
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dakersnar wrote:

Note: If you're removing caching, just remove the struct and go back to the original `using Chain = SmallVector<ChainElem, 1>;` to minimize churn.

https://github.com/llvm/llvm-project/pull/177908