[llvm] [VectorCombine] Fold binary op of reductions. (PR #121567)

[Mikhail Gudim via llvm-commits]

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@@ -1182,6 +1183,135 @@ bool VectorCombine::foldExtractedCmps(Instruction &I) {
   return true;
 }
 
+static void analyzeCostOfVecReduction(const IntrinsicInst &II,
+                                      TTI::TargetCostKind CostKind,
+                                      const TargetTransformInfo &TTI,
+                                      InstructionCost &CostBeforeReduction,
+                                      InstructionCost &CostAfterReduction) {
+  using namespace llvm::PatternMatch;
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mgudim wrote:

done

https://github.com/llvm/llvm-project/pull/121567