[all-commits] [llvm/llvm-project] c482b8: [VPlan] Only execute VPExpandSCEVRecipes once and ...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c482b8faeace855332a8c070cffaf3d0732cc79e
      https://github.com/llvm/llvm-project/commit/c482b8faeace855332a8c070cffaf3d0732cc79e
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2025-03-23 (Sun, 23 Mar 2025)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
    M llvm/lib/Transforms/Vectorize/VPlanHelpers.h
    M llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
    M llvm/test/Transforms/LoopVectorize/RISCV/riscv-vector-reverse.ll
    M llvm/test/Transforms/LoopVectorize/pr45259.ll
    M llvm/test/Transforms/LoopVectorize/vplan-predicate-switch.ll
    M llvm/test/Transforms/LoopVectorize/vplan-printing-before-execute.ll

  Log Message:
  -----------
  [VPlan] Only execute VPExpandSCEVRecipes once and remove them (NFC).

Instead of executing the whole entry VPIRBB twice, first only execute
the VPExpandSCEVRecipes and replace their uses with the expanded
VPValue, which will be a live-in. This allows removing special logic in
VPExpandSCEVRecipe to support executing twice and allows moving the
ExpandedSCEVs map out of VPTransformState.

It will also allow adding other recipes to the entry VPBB in the future.



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