[llvm] [DAGCombiner] Reconstruct borrow chain from icmp pattern for USUBO_CARRY (PR #193707)

[Simon Pilgrim via llvm-commits]

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In-Reply-To: <llvm.org/llvm/llvm-project/pull/193707 at github.com>


https://github.com/RKSimon approved this pull request.

LGTM with one minor

https://github.com/llvm/llvm-project/pull/193707