[all-commits] [llvm/llvm-project] 676c64: [VectorCombine] Use getInstructionCost to cost Shu...

[David Green via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 676c641718d0417a000b69917721bcc003d71d93
      https://github.com/llvm/llvm-project/commit/676c641718d0417a000b69917721bcc003d71d93
  Author: David Green <david.green at arm.com>
  Date:   2025-01-08 (Wed, 08 Jan 2025)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/VectorCombine.cpp
    M llvm/test/Transforms/PhaseOrdering/AArch64/block_scaling_decompr_8bit.ll

  Log Message:
  -----------
  [VectorCombine] Use getInstructionCost to cost Shuffle. (#122068)

This allows it to produce a more accurate cost for the shuffle, using
the more accurate calls to getShuffleCost in getInstructionCost. It
helps fix some of the regressions from vector combine a little while
ago, now that we have better subvector extract costs.



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