[all-commits] [llvm/llvm-project] 7b75db: [VPlan] Add new VPIRPhi overlay for VPIRInsts wrap...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 7b75db5755e63ddefa35101cf6a1179de560d312
      https://github.com/llvm/llvm-project/commit/7b75db5755e63ddefa35101cf6a1179de560d312
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2025-03-28 (Fri, 28 Mar 2025)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
    M llvm/lib/Transforms/Vectorize/VPlan.cpp
    M llvm/lib/Transforms/Vectorize/VPlan.h
    M llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
    M llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
    M llvm/lib/Transforms/Vectorize/VPlanVerifier.cpp

  Log Message:
  -----------
  [VPlan] Add new VPIRPhi overlay for VPIRInsts wrapping phi nodes (NFC). (#129387)

Add a new VPIRPhi subclass of VPIRInstruction, that purely serves as an
overlay, to provide more convenient checking (via directly doing
isa/dyn_cast/cast) and specialied execute/print implementations.

Both VPIRInstruction and VPIRPhi share the same VPDefID, and are
differentiated by the backing IR instruction.

This pattern could alos be used to provide more specialized interfaces
for some VPInstructions ocpodes, without introducing new, completely
spearate recipes. An example would be modeling VPWidenPHIRecipe &
VPScalarPHIRecip using VPInstructions opcodes and providing an interface
to retrieve incoming blocks and values through a VPInstruction subclass
similar to VPIRPhi.

PR: https://github.com/llvm/llvm-project/pull/129387



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