[all-commits] [llvm/llvm-project] 99741a: [VPlan] Introduce explicit ExtractFromEnd recipes ...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 99741ac28522f519713907d7bea4438ea5412e21
      https://github.com/llvm/llvm-project/commit/99741ac28522f519713907d7bea4438ea5412e21
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2024-08-21 (Wed, 21 Aug 2024)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
    M llvm/lib/Transforms/Vectorize/VPlanPatternMatch.h
    M llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
    M llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
    M llvm/test/Transforms/LoopVectorize/RISCV/vplan-vp-intrinsics-reduction.ll
    M llvm/test/Transforms/LoopVectorize/first-order-recurrence-chains.ll
    M llvm/test/Transforms/LoopVectorize/first-order-recurrence-complex.ll
    M llvm/test/Transforms/LoopVectorize/first-order-recurrence-sink-replicate-region.ll
    M llvm/test/Transforms/LoopVectorize/instruction-only-used-outside-of-loop.ll
    M llvm/test/Transforms/LoopVectorize/pr36983.ll
    M llvm/test/Transforms/LoopVectorize/pr55167-fold-tail-live-out.ll
    M llvm/test/Transforms/LoopVectorize/select-cmp-multiuse.ll
    M llvm/test/Transforms/LoopVectorize/vplan-printing.ll

  Log Message:
  -----------
  [VPlan] Introduce explicit ExtractFromEnd recipes for live-outs. (#100658)

Introduce explicit ExtractFromEnd recipes to extract the final values
for live-outs instead of implicitly extracting in VPLiveOut::fixPhi.

This is a follow-up to the recent changes of modeling extracts for
recurrences and consolidates live-out extract creation for fixed-order
recurrences at a single place: addLiveOutsForFirstOrderRecurrences.

It is also in preparation of replacing VPLiveOut with VPIRInstructions
wrapping the original scalar phis.

PR: https://github.com/llvm/llvm-project/pull/100658



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