[all-commits] [llvm/llvm-project] 490472: [RISCV][TTI] Add shuffle costing for masked slide ...

[Philip Reames via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 4904728cab8596320a77a895cb712fba07ea7bb1
      https://github.com/llvm/llvm-project/commit/4904728cab8596320a77a895cb712fba07ea7bb1
  Author: Philip Reames <preames at rivosinc.com>
  Date:   2025-02-27 (Thu, 27 Feb 2025)

  Changed paths:
    M llvm/include/llvm/Analysis/VectorUtils.h
    M llvm/lib/Analysis/VectorUtils.cpp
    M llvm/lib/Target/RISCV/RISCVISelLowering.cpp
    M llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
    M llvm/lib/Target/RISCV/RISCVTargetTransformInfo.h
    M llvm/test/Analysis/CostModel/RISCV/shuffle-exact-vlen.ll
    M llvm/test/Analysis/CostModel/RISCV/shuffle-extract_subvector.ll
    M llvm/test/Analysis/CostModel/RISCV/shuffle-transpose.ll
    M llvm/test/Transforms/SLPVectorizer/RISCV/complex-loads.ll
    M llvm/test/Transforms/SLPVectorizer/RISCV/reductions.ll

  Log Message:
  -----------
  [RISCV][TTI] Add shuffle costing for masked slide lowering (#128537)

This change adds the TTI costing corresponding to the recently added
isMaskedSlidePair lowering for vector shuffles. However, since the
existing costing code hadn't covered either slideup, slidedown, or the
(now removed) isElementRotate, the impact is larger in scope than just
that new lowering.

---------

Co-authored-by: Alexey Bataev <a.bataev at gmx.com>
Co-authored-by: Luke Lau <luke_lau at icloud.com>



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