[llvm] [VPlan] Add VPBundleRecipe, replacing extended reduction recipes. (PR #144281)

[Florian Hahn via llvm-commits]

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@@ -2506,30 +2500,193 @@ InstructionCost VPReductionRecipe::computeCost(ElementCount VF,
                                             Ctx.CostKind);
 }
 
-InstructionCost
-VPExtendedReductionRecipe::computeCost(ElementCount VF,
-                                       VPCostContext &Ctx) const {
-  unsigned Opcode = RecurrenceDescriptor::getOpcode(getRecurrenceKind());
-  Type *RedTy = Ctx.Types.inferScalarType(this);
-  auto *SrcVecTy =
-      cast<VectorType>(toVectorTy(Ctx.Types.inferScalarType(getVecOp()), VF));
-  assert(RedTy->isIntegerTy() &&
-         "ExtendedReduction only support integer type currently.");
-  return Ctx.TTI.getExtendedReductionCost(Opcode, isZExt(), RedTy, SrcVecTy,
-                                          std::nullopt, Ctx.CostKind);
+void VPBundleRecipe::bundle(ArrayRef<VPValue *> Operands) {
+  assert(!BundledRecipes.empty() && "Nothing to bundle?");
+
+  // Bundle up the operand recipes.
+  SmallPtrSet<VPUser *, 4> BundledUsers;
+  for (auto *R : BundledRecipes)
+    BundledUsers.insert(R);
+
+  // Recipes in the bundle, except the last one, must only be used inside the
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fhahn wrote:

Done thanks

https://github.com/llvm/llvm-project/pull/144281