[llvm] [InstCombine] simplify average of lsb (PR #95684)

[Yingwei Zheng via llvm-commits]

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@@ -1284,6 +1284,14 @@ Instruction *InstCombinerImpl::visitLShr(BinaryOperator &I) {
     return NewSub;
   }
 
+  // Fold (X + Y) / 2 --> (X & Y & 1) iff (X u<= 1) && (Y u<= 1)
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dtcxzyw wrote:

It looks unrelated. Don't worry :)

https://github.com/llvm/llvm-project/pull/95684