[llvm] [AArch64] Match BSP through trunc(and) canonicalization in OR combine (PR #198277)

[Rajveer Singh Bharadwaj via llvm-commits]

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Rajveer100 wrote:

I still think a safer approach is to use `m_c_<op>` so we always handle it explicitly.

https://github.com/llvm/llvm-project/pull/198277