[all-commits] [llvm/llvm-project] 07d284: [SLP]Add cost estimation for gather node reshuffling

[Alexey Bataev via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 07d284d4ebffd58d4b2934769b4e11fedd0b106e
      https://github.com/llvm/llvm-project/commit/07d284d4ebffd58d4b2934769b4e11fedd0b106e
  Author: Alexey Bataev <a.bataev at outlook.com>
  Date:   2024-12-24 (Tue, 24 Dec 2024)

  Changed paths:
    M llvm/include/llvm/CodeGen/BasicTTIImpl.h
    M llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
    M llvm/test/Analysis/CostModel/AMDGPU/shufflevector.ll
    M llvm/test/Analysis/CostModel/RISCV/shuffle-exact-vlen.ll
    M llvm/test/Analysis/CostModel/X86/shuffle-single-src-latency.ll
    M llvm/test/Analysis/CostModel/X86/shuffle-splat-codesize.ll
    M llvm/test/Analysis/CostModel/X86/shuffle-splat-latency.ll
    M llvm/test/Analysis/CostModel/X86/shuffle-splat-sizelatency.ll
    M llvm/test/Analysis/CostModel/X86/shuffle-splat.ll
    M llvm/test/Transforms/SLPVectorizer/AArch64/reused-scalar-repeated-in-node.ll
    M llvm/test/Transforms/SLPVectorizer/AArch64/scalarization-overhead.ll
    M llvm/test/Transforms/SLPVectorizer/RISCV/complex-loads.ll
    M llvm/test/Transforms/SLPVectorizer/X86/scatter-vectorize-reorder.ll
    M llvm/test/Transforms/SLPVectorizer/alternate-cmp-swapped-pred-parent.ll
    M llvm/test/Transforms/SLPVectorizer/extract-many-users-buildvector.ll
    M llvm/test/Transforms/SLPVectorizer/full-overlap-non-schedulable.ll
    M llvm/test/Transforms/SLPVectorizer/gathered-consecutive-loads-different-types.ll
    M llvm/test/Transforms/SLPVectorizer/reorder-clustered-node.ll
    M llvm/test/Transforms/SLPVectorizer/resized-alt-shuffle-after-minbw.ll

  Log Message:
  -----------
  [SLP]Add cost estimation for gather node reshuffling

Adds cost estimation for the variants of the permutations of the scalar
values, used in gather nodes. Currently, SLP just unconditionally emits
shuffles for the reused buildvectors, but in some cases better to leave
them as buildvectors rather than shuffles, if the cost of such
buildvectors is better.

X86, AVX512, -O3+LTO
Metric: size..text

Program                                                                        size..text
                                                                               results     results0    diff
                 test-suite :: External/SPEC/CINT2006/445.gobmk/445.gobmk.test   912998.00   913238.00  0.0%
 test-suite :: MultiSource/Benchmarks/MiBench/consumer-lame/consumer-lame.test   203070.00   203102.00  0.0%
     test-suite :: External/SPEC/CFP2017speed/638.imagick_s/638.imagick_s.test  1396320.00  1396448.00  0.0%
      test-suite :: External/SPEC/CFP2017rate/538.imagick_r/538.imagick_r.test  1396320.00  1396448.00  0.0%
                       test-suite :: MultiSource/Benchmarks/Bullet/bullet.test   309790.00   309678.00 -0.0%
      test-suite :: External/SPEC/CFP2017rate/526.blender_r/526.blender_r.test 12477607.00 12470807.00 -0.1%

CINT2006/445.gobmk - extra code vectorized
MiBench/consumer-lame - small variations
CFP2017speed/638.imagick_s
CFP2017rate/538.imagick_r - extra vectorized code
Benchmarks/Bullet - extra code vectorized
CFP2017rate/526.blender_r - extra vector code

RISC-V, sifive-p670, -O3+LTO
CFP2006/433.milc - regressions, should be fixed by https://github.com/llvm/llvm-project/pull/115173
CFP2006/453.povray - extra vectorized code
CFP2017rate/508.namd_r - better vector code
CFP2017rate/510.parest_r - extra vectorized code
SPEC/CFP2017rate - extra/better vector code
CFP2017rate/526.blender_r - extra vectorized code
CFP2017rate/538.imagick_r - extra vectorized code
CINT2006/403.gcc - extra vectorized code
CINT2006/445.gobmk - extra vectorized code
CINT2006/464.h264ref - extra vectorized code
CINT2006/483.xalancbmk - small variations
CINT2017rate/525.x264_r - better vectorization

Reviewers: RKSimon

Reviewed By: RKSimon

Pull Request: https://github.com/llvm/llvm-project/pull/115201



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