[all-commits] [llvm/llvm-project] 1a60c7: [CostModel][X86] SK_InsertSubvector inserted into ...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1a60c74c131ab1cde2206b3aa13b6aba9174776d
      https://github.com/llvm/llvm-project/commit/1a60c74c131ab1cde2206b3aa13b6aba9174776d
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2025-06-26 (Thu, 26 Jun 2025)

  Changed paths:
    M llvm/lib/Target/X86/X86TargetTransformInfo.cpp
    M llvm/test/Transforms/PhaseOrdering/X86/hadd.ll
    M llvm/test/Transforms/PhaseOrdering/X86/hsub.ll
    M llvm/test/Transforms/SLPVectorizer/X86/extracts-non-extendable.ll

  Log Message:
  -----------
  [CostModel][X86] SK_InsertSubvector inserted into the lowest subvector should be treated as SK_Select blend (#145892)

X86 uses implicit widening and BLEND/MOV shuffles in these cases - otherwise we still treat it as a SK_PermuteTwoSrc



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