[all-commits] [llvm/llvm-project] 6a9e8f: [VPlan] Introduce VPInstructionWithType, use inste...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 6a9e8fc50c87a01798b847e623139fc21249c2bb
      https://github.com/llvm/llvm-project/commit/6a9e8fc50c87a01798b847e623139fc21249c2bb
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2025-04-10 (Thu, 10 Apr 2025)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/LoopVectorizationPlanner.h
    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/VPlanRecipes.cpp
    M llvm/lib/Transforms/Vectorize/VPlanUtils.cpp
    M llvm/lib/Transforms/Vectorize/VPlanUtils.h
    M llvm/lib/Transforms/Vectorize/VPlanValue.h
    M llvm/lib/Transforms/Vectorize/VPlanVerifier.cpp
    M llvm/test/Transforms/LoopVectorize/RISCV/vplan-vp-call-intrinsics.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/vplan-vp-cast-intrinsics.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/vplan-vp-intrinsics-fixed-order-recurrence.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/vplan-vp-intrinsics-reduction.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/vplan-vp-intrinsics.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/vplan-vp-select-intrinsics.ll
    M llvm/test/Transforms/LoopVectorize/interleave-and-scalarize-only.ll

  Log Message:
  -----------
  [VPlan] Introduce VPInstructionWithType, use instead of VPScalarCast(NFC) (#129706)

There are some opcodes that currently require specialized recipes, due
to their result type not being implied by their operands, including
casts.

This leads to duplication from defining multiple full recipes.

This patch introduces a new VPInstructionWithType subclass that also
stores the result type. The general idea is to have opcodes needing to
specify a result type to use this general recipe. The current patch
replaces VPScalarCastRecipe with VInstructionWithType, a similar patch
for VPWidenCastRecipe will follow soon.

There are a few proposed opcodes that should also benefit, without the
need of workarounds:
* https://github.com/llvm/llvm-project/pull/129508
* https://github.com/llvm/llvm-project/pull/119284

PR: https://github.com/llvm/llvm-project/pull/129706



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