[PATCH] D146128: [SVE][LoopVectorize] Add option to disable tail-folding for reverse loops

[Dave Green via Phabricator via llvm-commits]

dmgreen added a comment.

LoopVectorizationLegality::containsDecreasingPointers seems to loop over all the instructions and call isConsecutivePtr, which just calls getPtrStride. Could that logic just be placed in AArch64TTIImpl::preferPredicateOverEpilogue? That is how it has worked in ARMTTIImpl::preferPredicateOverEpilogue via canTailPredicateLoop. Otherwise the code in containsDecreasingPointers is ran for any architecture, but only used by AArch64.


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  https://reviews.llvm.org/D146128/new/

https://reviews.llvm.org/D146128