[Mlir-commits] [mlir] [mlir][mesh] Add endomorphism simplification for all-reduce (PR #73150)

[Chengji Yao]

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+// RUN: mlir-opt -test-mesh-simplifications %s | FileCheck %s
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yaochengji wrote:

Yes, it's a complex problem. A common approach is to leave it unsimplified. XLA has [a pass](https://github.com/openxla/xla/blob/main/xla/service/all_reduce_reassociate.h) with similar logic, maybe we can check its logic there 

https://github.com/llvm/llvm-project/pull/73150