[PATCH] D98210: [ARM] Add VREV MVE shuffle costs

[Dave Green via Phabricator via llvm-commits]

dmgreen created this revision.
dmgreen added reviewers: SjoerdMeijer, NickGuy, samtebbs, spatel, RKSimon, fhahn, sdesmalen.
Herald added subscribers: danielkiss, hiraditya, kristof.beyls.
dmgreen requested review of this revision.
Herald added a project: LLVM.

This uses the shuffle mask cost from D98206 <https://reviews.llvm.org/D98206> to give a better cost of MVE VREV instructions. This helps especially in VectorCombine where the cost of shuffles is used to reorder bitcasts, which this helps improve/refix the phase ordering test for fp16 reductions from intrinsics. The isVREVMask has been moved to a header file to allow it to be used across target transform and isel lowering.


https://reviews.llvm.org/D98210

Files:
  llvm/lib/Target/ARM/ARMISelLowering.cpp
  llvm/lib/Target/ARM/ARMTargetTransformInfo.cpp
  llvm/lib/Target/ARM/ARMTargetTransformInfo.h
  llvm/test/Analysis/CostModel/ARM/shuffle.ll
  llvm/test/Transforms/PhaseOrdering/ARM/mve-floatreduce.ll

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