[llvm] [InstCombine] Fold vector.reduce.op(vector.reverse(X)) -> vector.reduce.op(X) (PR #91743)

[Paul Walker via llvm-commits]

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@@ -1435,6 +1435,34 @@ static Instruction *foldBitOrderCrossLogicOp(Value *V,
   return nullptr;
 }
 
+Value *InstCombinerImpl::simplifyReductionOperand(Value *Arg,
+                                                  bool CanReorderLanes) {
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paulwalker-arm wrote:

I'm happy either way but I suppose at this moment in time this could just be a static function.

https://github.com/llvm/llvm-project/pull/91743