[llvm] [VPlan] Change parent of VPReductionRecipe to VPRecipeWithIRFlags. NFC (PR #130881)

[Luke Lau via llvm-commits]

================
@@ -2296,29 +2304,33 @@ class VPReductionRecipe : public VPSingleDefRecipe {
 protected:
   VPReductionRecipe(const unsigned char SC, const RecurrenceDescriptor &R,
                     Instruction *I, ArrayRef<VPValue *> Operands,
-                    VPValue *CondOp, bool IsOrdered, DebugLoc DL)
-      : VPSingleDefRecipe(SC, Operands, I, DL), RdxDesc(R),
+                    VPValue *CondOp, bool IsOrdered)
+      : VPRecipeWithIRFlags(SC, Operands, *I), RdxDesc(R),
         IsOrdered(IsOrdered) {
     if (CondOp) {
       IsConditional = true;
       addOperand(CondOp);
     }
+    // The inloop reduction may across multiple scalar instruction and the
+    // underlying instruction may not contains the corresponding flags. Set the
+    // flags explicit from the redurrence descriptor.
----------------
lukel97 wrote:

```suggestion
    // In-loop reductions may comprise of multiple scalar instructions, and the
    // underlying instruction may not contain the same flags as the
    // recurrence descriptor, so set the flags explicitly.
```

https://github.com/llvm/llvm-project/pull/130881