[all-commits] [llvm/llvm-project] 0d78fb: [VPlan] Make simplifyRecipe more like InstCombine

[Luke Lau via All-commits]

  Branch: refs/heads/users/lukel97/loop-vectorize/simplify-recipe-return-value
  Home:   https://github.com/llvm/llvm-project
  Commit: 0d78fb5d33d5447fa0a7d4c69ae1ca3464322237
      https://github.com/llvm/llvm-project/commit/0d78fb5d33d5447fa0a7d4c69ae1ca3464322237
  Author: Luke Lau <luke at igalia.com>
  Date:   2026-07-30 (Thu, 30 Jul 2026)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
    M llvm/test/Transforms/LoopVectorize/VPlan/constant-fold.ll
    M llvm/test/Transforms/LoopVectorize/epilog-vectorization-reductions.ll

  Log Message:
  -----------
  [VPlan] Make simplifyRecipe more like InstCombine

Most combines in simplifyRecipe RAUW a value, but not all of them erase the old recipe.
Unify them and bring it in line with InstCombine by having it return a VPValue, which simplifyRecipes can then call RAUW with, and automatically erase the old recipe.

Similarly to InstCombine, combines that modify a recipe should return the same recipe.



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