[PATCH] D147331: [ARM] Increase the Scalarized cost of masked gather/scatter operations

Fri Mar 31 07:51:40 PDT 2023

dmgreen created this revision.
dmgreen added reviewers: samtebbs, NickGuy.
Herald added subscribers: hiraditya, kristof.beyls.
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If a gather/scatter is masked and will need to be scalarized then the cost should be higher than we currently produce. An additional cost for scalarizing the mask, extracting i1s and branching on the result needs to be added, which I gave a cost of 5 in this patch.

https://reviews.llvm.org/D147331

Files:
  llvm/lib/Target/ARM/ARMTargetTransformInfo.cpp
  llvm/test/Analysis/CostModel/ARM/mve-gather-scatter-cost.ll

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