[llvm] [LoadStoreVectorizer] Postprocess and merge equivalence classes (PR #114501)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,63 @@
+; RUN: opt %s -mtriple=x86_64-unknown-linux-gnu -passes=load-store-vectorizer -mcpu=skx -S -o %t.out.ll
+; RUN: FileCheck -input-file=%t.out.ll %s
+
+; This test verifies that the vectorizer can handle an extended sequence of
+; getelementptr instructions and generate longer vectors. With special handling,
+; some elements can still be vectorized even if they require looking up the
+; common underlying object deeper than 6 levels from the original pointer.
+
+; The test below is the simplified version of actual performance oriented
+; workload; the offsets in getelementptr instructins are similar or same for
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arsenm wrote:

```suggestion
; workload; the offsets in getelementptr instructions are similar or same for
```

https://github.com/llvm/llvm-project/pull/114501