[all-commits] [llvm/llvm-project] 3fc741: [VPlan] Replace ExtractLast(Elem|LanePerPart) with...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 3fc741923643040cc17ef9562983994e73c74efb
      https://github.com/llvm/llvm-project/commit/3fc741923643040cc17ef9562983994e73c74efb
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2025-12-07 (Sun, 07 Dec 2025)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
    M llvm/lib/Transforms/Vectorize/VPlan.h
    M llvm/lib/Transforms/Vectorize/VPlanAnalysis.cpp
    M llvm/lib/Transforms/Vectorize/VPlanConstruction.cpp
    M llvm/lib/Transforms/Vectorize/VPlanPatternMatch.h
    M llvm/lib/Transforms/Vectorize/VPlanPredicator.cpp
    M llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
    M llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
    M llvm/lib/Transforms/Vectorize/VPlanUnroll.cpp
    M llvm/test/Transforms/LoopVectorize/first-order-recurrence-chains-vplan.ll
    M llvm/test/Transforms/LoopVectorize/interleave-and-scalarize-only.ll
    M llvm/test/Transforms/LoopVectorize/vplan-printing-reductions.ll
    M llvm/test/Transforms/LoopVectorize/vplan-printing.ll
    M llvm/unittests/Transforms/Vectorize/VPlanVerifierTest.cpp

  Log Message:
  -----------
  [VPlan] Replace ExtractLast(Elem|LanePerPart) with ExtractLast(Lane/Part) (#164124)

Replace ExtractLastElement and ExtractLastLanePerPart with more generic
and specific ExtractLastLane and ExtractLastPart, which model distinct
parts of extracting across parts and lanes. ExtractLastElement ==
ExtractLastLane(ExtractLastPart) and ExtractLastLanePerPart ==
ExtractLastLane, the latter clarifying the name of the opcode. A new
m_ExtractLastElement matcher is provided for convenience.

The patch should be NFC modulo printing changes.

PR: https://github.com/llvm/llvm-project/pull/164124



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