[all-commits] [llvm/llvm-project] 9a5a87: [VPlan] Introduce ResumePhi VPInstruction, use to ...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 9a5a8731e77bb61c64d400a828dc215dc80fb839
      https://github.com/llvm/llvm-project/commit/9a5a8731e77bb61c64d400a828dc215dc80fb839
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2024-07-11 (Thu, 11 Jul 2024)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
    M llvm/lib/Transforms/Vectorize/VPlan.h
    M llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
    M llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
    M llvm/test/Transforms/LoopVectorize/AArch64/first-order-recurrence-fold-tail.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/fixed-order-recurrence.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/induction-costs.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/loop-vectorization-factors.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/reduction-recurrence-costs-sve.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/sve-interleaved-accesses.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/first-order-recurrence-scalable-vf1.ll
    M llvm/test/Transforms/LoopVectorize/SystemZ/predicated-first-order-recurrence.ll
    M llvm/test/Transforms/LoopVectorize/X86/fixed-order-recurrence.ll
    M llvm/test/Transforms/LoopVectorize/X86/induction-costs.ll
    M llvm/test/Transforms/LoopVectorize/X86/pr72969.ll
    M llvm/test/Transforms/LoopVectorize/first-order-recurrence-chains-vplan.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-multiply-recurrences.ll
    M llvm/test/Transforms/LoopVectorize/first-order-recurrence-sink-replicate-region.ll
    M llvm/test/Transforms/LoopVectorize/first-order-recurrence.ll
    M llvm/test/Transforms/LoopVectorize/induction.ll
    M llvm/test/Transforms/LoopVectorize/interleave-and-scalarize-only.ll
    M llvm/test/Transforms/LoopVectorize/interleaved-accesses.ll
    M llvm/test/Transforms/LoopVectorize/scalable-first-order-recurrence.ll
    M llvm/test/Transforms/LoopVectorize/vplan-printing.ll

  Log Message:
  -----------
  [VPlan] Introduce ResumePhi VPInstruction, use to create phi for FOR. (#94760)

This patch introduces a new ResumePhi VPInstruction which creates a phi
in a leaf block of a VPlan. The first use is to create the phi node for
fixed-order recurrence resume values in the scalar preheader.

The VPInstruction takes 2 operands: 1) the incoming value from the
middle-block and a default value to be used for all other incoming
blocks.

In follow-up changes, it will also be used to create phis for reduction
and induction resume values.

Depends on https://github.com/llvm/llvm-project/pull/92651

PR: https://github.com/llvm/llvm-project/pull/94760



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