[LV]Initial support for safe distance in predicated DataWithEVL vectorization mode. Enabled initial support for max safe distance in DataWithEVL mode. If max safe distance is required, need to emit special code: CMP = icmp ult AVL, MAX_SAFE_DISTANCE SAFE_AVL = select CMP, AVL, MAX_SAFE_DISTANCE EVL = call i32 @llvm.experimental.get.vector.length(i64 SAFE_AVL) while vectorize the loop in DataWithEVL tail folding mode. Reviewers: fhahn Reviewed By: fhahn Pull Request: https://github.com/llvm/llvm-project/pull/102897
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