[llvm] [InstCombine] Canonicalize zext+overflow check to overflow check if zext's only purpose is to check overflow (PR #140178)

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Tue Feb 3 08:59:50 PST 2026

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SiliconA-Z wrote:

Rebased. @dtcxzyw It has been a while but can you check this?

https://github.com/llvm/llvm-project/pull/140178

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