[all-commits] [llvm/llvm-project] 78c59e: [SBVec] Implement topDown/botUp vectorizers in unison

[Anshil Gandhi via All-commits]

  Branch: refs/heads/users/gandhi56/sandbox-vectorizer/topdown-vec
  Home:   https://github.com/llvm/llvm-project
  Commit: 78c59edd28584427e8407cfb30ca56c28c194f4c
      https://github.com/llvm/llvm-project/commit/78c59edd28584427e8407cfb30ca56c28c194f4c
  Author: Anshil Gandhi <gandhi21299 at gmail.com>
  Date:   2026-07-08 (Wed, 08 Jul 2026)

  Changed paths:
    M llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/Passes/BottomUpVec.h
    M llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/Scheduler.h
    M llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/VecUtils.h
    M llvm/lib/Transforms/Vectorize/SandboxVectorizer/Passes/BottomUpVec.cpp
    M llvm/lib/Transforms/Vectorize/SandboxVectorizer/VecUtils.cpp
    M llvm/test/Transforms/SandboxVectorizer/external_uses.ll
    M llvm/test/Transforms/SandboxVectorizer/pack.ll
    A llvm/test/Transforms/SandboxVectorizer/topdown_vec.ll
    M llvm/unittests/Transforms/Vectorize/SandboxVectorizer/VecUtilsTest.cpp

  Log Message:
  -----------
  [SBVec] Implement topDown/botUp vectorizers in unison

This patch introduces the `top-down-vec` pass to the Sandbox Vectorizer,
adding the ability to traverse use-def chains top-down to discover and
collect vectorization opportunities. Furthermore, this patch unifies
the two vectorizers into a single implementation to minimize code
duplication.
* vectorize in the same direction as the scheduler direction
* use AuxArg to determine vectorizer direction
* move user collection to VecUtils and add unit tests
* handle legality results
* introduce getNextBundles to loop ovop over getNextBundle calls for each user
* introduce BundleTy and GetOpIdxVec



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