[PATCH] [LoopVectorize] Detect correctly if vectorizer will create a tail loop

[Marianne Mailhot-Sarrasin]

Hi,

Here is a simple bug fix. With option OptForSize enabled, the Loop Vectorizer is not supposed to create tail loop. The condition checking that was invalid and was not matching to the comment above.

Could someone please review and commit if valid ?

Thanks,
Marianne
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