[llvm] [SLP][REVEC] VectorValuesAndScales should be supported by REVEC. (PR #135762)

[Alexey Bataev via llvm-commits]

================
@@ -22718,9 +22681,35 @@ class HorizontalReduction {
   Value *createSingleOp(IRBuilderBase &Builder, const TargetTransformInfo &TTI,
                         Value *Vec, unsigned Scale, bool IsSigned,
                         Type *DestTy) {
-    Value *Rdx = emitReduction(Vec, Builder, &TTI, DestTy);
-    if (Rdx->getType() != DestTy->getScalarType())
-      Rdx = Builder.CreateIntCast(Rdx, DestTy->getScalarType(), IsSigned);
+    Value *Rdx;
+    if (auto *VecTy = dyn_cast<FixedVectorType>(DestTy)) {
+      unsigned DestTyNumElements = VecTy->getNumElements();
----------------
alexey-bataev wrote:

```suggestion
      unsigned DestTyNumElements = getNumElements(VecTy);
```

https://github.com/llvm/llvm-project/pull/135762