[all-commits] [llvm/llvm-project] 0e2138: Revert "[LoopVectorizer] Add support for chaining ...

[Vitaly Buka via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 0e213834df114484ca9525c0e60522b40ecf24e8
      https://github.com/llvm/llvm-project/commit/0e213834df114484ca9525c0e60522b40ecf24e8
  Author: Vitaly Buka <vitalybuka at google.com>
  Date:   2025-01-23 (Thu, 23 Jan 2025)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
    M llvm/lib/Transforms/Vectorize/VPRecipeBuilder.h
    M llvm/lib/Transforms/Vectorize/VPlan.h
    R llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-chained.ll

  Log Message:
  -----------
  Revert "[LoopVectorizer] Add support for chaining partial reductions (#120272)" (#124198)

Introduced stack buffer overflow, see #120272.

`getScaledReduction` can return empty vector, and there is not check for
that.

This reverts commit c9b7303b9b18129c4ee6b56aaa2a0a9f59be2d09.
This reverts commit caf0540b91b0fee31353dc7049ae836e0f814cff.



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