[llvm] [AArch64][NEON] Fold insert(zero, extract(X, 0), 0) -> X when X is known to zero lanes 1-N (PR #213940)

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Fri Aug 7 09:26:23 PDT 2026


https://github.com/CarolineConcatto edited https://github.com/llvm/llvm-project/pull/213940


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