[llvm] [VPlan] Impl VPlan-based pattern match for ExtendedRed and MulAccRed (PR #113903)

[Florian Hahn via llvm-commits]

================
@@ -2445,6 +2476,60 @@ void VPReductionEVLRecipe::print(raw_ostream &O, const Twine &Indent,
     O << " (with final reduction value stored in invariant address sank "
          "outside of loop)";
 }
+
+void VPExtendedReductionRecipe::print(raw_ostream &O, const Twine &Indent,
+                                      VPSlotTracker &SlotTracker) const {
+  const RecurrenceDescriptor &RdxDesc = getRecurrenceDescriptor();
+  O << Indent << "EXTENDED-REDUCE ";
+  printAsOperand(O, SlotTracker);
+  O << " = ";
+  getChainOp()->printAsOperand(O, SlotTracker);
+  O << " +";
+  O << " reduce." << Instruction::getOpcodeName(RdxDesc.getOpcode()) << " (";
+  getVecOp()->printAsOperand(O, SlotTracker);
+  O << " extended to " << *getResultType();
+  if (isConditional()) {
+    O << ", ";
+    getCondOp()->printAsOperand(O, SlotTracker);
+  }
+  O << ")";
+  if (RdxDesc.IntermediateStore)
+    O << " (with final reduction value stored in invariant address sank "
+         "outside of loop)";
----------------
fhahn wrote:

This can be removed I think, as the store is explicit in the VPlan anyways nw

https://github.com/llvm/llvm-project/pull/113903