David Sherwood 69ee653313 [LoopVectorize] Take vscale into account when deciding to create epilogues
In LoopVectorizationCostModel::isEpilogueVectorizationProfitable we
check to see if the chosen main vector loop VF >= 16. If so, we
decide to create a vector epilogue loop. However, this doesn't
take VScaleForTuning into account because we could be targeting a
CPU where vscale > 1, and hence the runtime VF would be a multiple
of the known minimum value.

This patch multiplies scalable VFs by VScaleForTuning and several
tests have been updated that now produce vector epilogues.

Differential Revision: https://reviews.llvm.org/D147522
2023-04-17 10:49:40 +00:00
..
2023-04-12 16:17:58 -07:00