[all-commits] [llvm/llvm-project] 5d13b1: [SLP]Improve isUndefVector function by adding inse...

[Andrew V. Tischenko via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 5d13b12674c620774c733205703da836cefc6782
      https://github.com/llvm/llvm-project/commit/5d13b12674c620774c733205703da836cefc6782
  Author: Alexey Bataev <a.bataev at outlook.com>
  Date:   2022-09-16 (Fri, 16 Sep 2022)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
    M llvm/test/Transforms/SLPVectorizer/X86/buildvector-same-lane-insert.ll
    M llvm/test/Transforms/SLPVectorizer/X86/cmp-as-alternate-ops.ll
    M llvm/test/Transforms/SLPVectorizer/X86/insert-element-build-vector.ll

  Log Message:
  -----------
  [SLP]Improve isUndefVector function by adding insertelement analysis.

Added the mask and the analysis of the buildvector sequence in the
isUndefVector function, improves codegen and cost estimation.

Metric: SLP.NumVectorInstructions

Program                                                                                       SLP.NumVectorInstructions
                                                                          results                   results0 diff
test-suite :: External/SPEC/CFP2017rate/526.blender_r/526.blender_r.test 27362.00                  27360.00 -0.0%

Metric: size..text

Program                                                                                                           size..text
                                                                   results     results0    diff
test-suite :: External/SPEC/CFP2017rate/508.namd_r/508.namd_r.test   805299.00   806035.00  0.1%

526.blender_r - some extra code is vectorized.
508.namd_r - some extra code is optimized out.

Differential Revision: https://reviews.llvm.org/D133891