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

[Luke Lau via llvm-commits]

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@@ -2296,29 +2304,34 @@ 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) {
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lukel97 wrote:

> The RecurrenceDescriptor default contains fast flags. If we always set the FMF directly from recurrenceDescriptor without check if the underlyingInstruction is FPMathOperator or not, we will see fast on the integer reduction.

Yes but this is the current behaviour today, the flags were just hidden from the print output because of the `if (isa<FPMathOperator>(getUnderlyingInstr()))`. I think that's why we're seeing the test changes

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