[PATCH] D54892: [LAA] Avoid generating RT checks for known deps preventing vectorization.

[Florian Hahn via Phabricator via llvm-commits]

fhahn added a comment.

In D54892#1308227 <https://reviews.llvm.org/D54892#1308227>, @anemet wrote:

> Hi Florian, are you saying that in this case (known unsafe dep) we would still vectorize the loop (and always fail at run-time)?


Without this patch, yes if the loop has at least one unknown dependence and a non-vectorizable dependence, as in the test case: %l2 - store %ad is unknown, as the they have non constant offsets, %lc - store %vc is known non vectorizable.


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  https://reviews.llvm.org/D54892/new/

https://reviews.llvm.org/D54892