[llvm] [LV] Tidy up early bail outs related to runtime checks (PR #228077)

[David Sherwood via llvm-commits]

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david-arm wrote:

Thanks for this! I've added the test to the PR, however it's an odd one, since all the accesses are based off the same underlying object. I guess the memory dependence analysis gets thrown by the offset `%off` and has no choice but to fall back on runtime memory checks.

https://github.com/llvm/llvm-project/pull/228077