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

[Florian Hahn via llvm-commits]

================
@@ -1231,11 +1252,22 @@ class VPWidenRecipe : public VPRecipeWithIRFlags, public VPIRMetadata {
       : VPRecipeWithIRFlags(VPDefOpcode, Operands, I), VPIRMetadata(I),
         Opcode(I.getOpcode()) {}
 
+  template <typename IterT>
+  VPWidenRecipe(unsigned VPDefOpcode, unsigned Opcode,
+                iterator_range<IterT> Operands, bool NUW, bool NSW, DebugLoc DL)
+      : VPRecipeWithIRFlags(VPDefOpcode, Operands, WrapFlagsTy(NUW, NSW), DL),
+        Opcode(Opcode) {}
+
 public:
   template <typename IterT>
   VPWidenRecipe(Instruction &I, iterator_range<IterT> Operands)
       : VPWidenRecipe(VPDef::VPWidenSC, I, Operands) {}
 
+  template <typename IterT>
+  VPWidenRecipe(unsigned Opcode, iterator_range<IterT> Operands, bool NUW,
----------------
fhahn wrote:

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

on current main, using `ArrayRef<>` for operands should work.


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