[all-commits] [llvm/llvm-project] dec47b: [CostModel][X86] Update baseline CTTZ/CTLZ costs f...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: dec47b76f406242dfb9d36da4d7adfb171c71104
      https://github.com/llvm/llvm-project/commit/dec47b76f406242dfb9d36da4d7adfb171c71104
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2025-01-26 (Sun, 26 Jan 2025)

  Changed paths:
    M llvm/lib/Target/X86/X86TargetTransformInfo.cpp
    M llvm/test/Analysis/CostModel/X86/ctlz-codesize.ll
    M llvm/test/Analysis/CostModel/X86/ctlz-sizelatency.ll
    M llvm/test/Analysis/CostModel/X86/ctlz.ll
    M llvm/test/Analysis/CostModel/X86/cttz-codesize.ll
    M llvm/test/Analysis/CostModel/X86/cttz-sizelatency.ll
    M llvm/test/Analysis/CostModel/X86/cttz.ll
    M llvm/test/Analysis/CostModel/X86/intrinsic-cost-kinds.ll
    M llvm/test/Transforms/SLPVectorizer/X86/ctlz.ll
    M llvm/test/Transforms/SLPVectorizer/X86/cttz.ll

  Log Message:
  -----------
  [CostModel][X86] Update baseline CTTZ/CTLZ costs for x86_64 (#124312)

Followup to #123623 - now that the CMOV has been removed, the throughput has improved, reducing the benefit of vectorization on pre-x86-64-v3 CPUs



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