[all-commits] [llvm/llvm-project] 1e06cd: [SLP][NFC] Fix uninitialized ReductionRoot in getT...

[Alexey Bataev via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1e06cd634e849054d1fe11c1493870b2a7ddf1c9
      https://github.com/llvm/llvm-project/commit/1e06cd634e849054d1fe11c1493870b2a7ddf1c9
  Author: Alexey Bataev <a.bataev at outlook.com>
  Date:   2026-04-01 (Wed, 01 Apr 2026)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp

  Log Message:
  -----------
  [SLP][NFC] Fix uninitialized ReductionRoot in getTreeCost

ReductionRoot was initialized to nullptr instead of the RdxRoot
parameter. This caused two ScaleCost calls (for MinBWs cast cost and
ReductionBitWidth resize cost) to pass nullptr as the user instruction,
and suppressed the "Reduction Cost" line in debug output. In practice
the scale factor is the same because the tree root's main op and the
reduction root share the same basic block, so this is NFC.

Reviewers: 

Pull Request: https://github.com/llvm/llvm-project/pull/189994



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