[all-commits] [llvm/llvm-project] a39d2d: [ARM] Increase the Scalarized cost of masked gathe...

[David Green via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: a39d2d50afcbe9796c5fffda86788fb51716aecb
      https://github.com/llvm/llvm-project/commit/a39d2d50afcbe9796c5fffda86788fb51716aecb
  Author: David Green <david.green at arm.com>
  Date:   2023-04-11 (Tue, 11 Apr 2023)

  Changed paths:
    M llvm/lib/Target/ARM/ARMTargetTransformInfo.cpp
    M llvm/test/Analysis/CostModel/ARM/intrinsic-cost-kinds.ll
    M llvm/test/Analysis/CostModel/ARM/mve-gather-scatter-cost.ll

  Log Message:
  -----------
  [ARM] Increase the Scalarized cost of masked gather/scatter operations

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
this patch gives a cost of 5.

Differential Revision: https://reviews.llvm.org/D147331