[llvm] [VPlan] Implement VPExtendedReduction, VPMulAccumulateReductionRecipe and corresponding vplan transformations. (PR #137746)

[Florian Hahn via llvm-commits]

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@@ -1243,10 +1264,21 @@ class VPWidenRecipe : public VPRecipeWithIRFlags, public VPIRMetadata {
       : VPRecipeWithIRFlags(VPDefOpcode, Operands, I), VPIRMetadata(I),
         Opcode(I.getOpcode()) {}
 
+  template <typename IterT>
+  VPWidenRecipe(unsigned VPDefOpcode, unsigned Opcode, ArrayRef<IterT> Operands,
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fhahn wrote:

```suggestion
  VPWidenRecipe(unsigned VPDefOpcode, unsigned Opcode, ArrayRef<VPValue *> Operands,
```

should work

https://github.com/llvm/llvm-project/pull/137746