[llvm] [CodeGen] Remove `shouldExpandPartialReductionIntrinsic()` hook (NFC) (PR #161498)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-llvm-selectiondag

Author: Benjamin Maxwell (MacDue)

<details>
<summary>Changes</summary>

This is unused. Targets can lower/expand the `PARTIAL_REDUCE_*` ISD nodes.

---
Full diff: https://github.com/llvm/llvm-project/pull/161498.diff


2 Files Affected:

- (modified) llvm/include/llvm/CodeGen/TargetLowering.h (-7) 
- (modified) llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp (-4) 


``````````diff
diff --git a/llvm/include/llvm/CodeGen/TargetLowering.h b/llvm/include/llvm/CodeGen/TargetLowering.h
index c45e03a7bdad8..7bbad172b2d42 100644
--- a/llvm/include/llvm/CodeGen/TargetLowering.h
+++ b/llvm/include/llvm/CodeGen/TargetLowering.h
@@ -480,13 +480,6 @@ class LLVM_ABI TargetLoweringBase {
     return true;
   }
 
-  /// Return true if the @llvm.vector.partial.reduce.* intrinsic
-  /// should be expanded using generic code in SelectionDAGBuilder.
-  virtual bool
-  shouldExpandPartialReductionIntrinsic(const IntrinsicInst *I) const {
-    return true;
-  }
-
   /// Return true if the @llvm.get.active.lane.mask intrinsic should be expanded
   /// using generic code in SelectionDAGBuilder.
   virtual bool shouldExpandGetActiveLaneMask(EVT VT, EVT OpVT) const {
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index b5201a311c591..c21890a0d856f 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -8103,10 +8103,6 @@ void SelectionDAGBuilder::visitIntrinsicCall(const CallInst &I,
     return;
   }
   case Intrinsic::vector_partial_reduce_add: {
-    if (!TLI.shouldExpandPartialReductionIntrinsic(cast<IntrinsicInst>(&I))) {
-      visitTargetIntrinsic(I, Intrinsic);
-      return;
-    }
     SDValue Acc = getValue(I.getOperand(0));
     SDValue Input = getValue(I.getOperand(1));
     setValue(&I,

``````````

</details>


https://github.com/llvm/llvm-project/pull/161498