[llvm] [SLP] Update analyzeRtStrideCandidate() to correctly handle revectorization (PR #191878)

[Mikhail Gudim via llvm-commits]

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@@ -7453,14 +7453,17 @@ bool BoUpSLP::analyzeRtStrideCandidate(ArrayRef<Value *> PointerOps,
     if (Sz % NumOffsets != 0)
       return false;
     VecSz = Sz / NumOffsets;
+  }
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mgudim wrote:

there is no test for `isVectorTy() = true` , `NumOffsets == 1`

https://github.com/llvm/llvm-project/pull/191878