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[LoopVectorize][AArch64] - Missed Loop Vectorization for Neon target due to high cost of scalarization of sdiv, for mcpu=oryon-1.

For the following IR test case, Loop vectorizer blocks vectorization of this loop due to high cost of scalar sdiv operation.
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LoopVectorizationLegality.cpp --------------------------------------===//

// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license ...