[all-commits] [llvm/llvm-project] 3db0f8: [SLP]Update TrackedToOrig mappings after reduction...

[Alexey Bataev via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 3db0f8c895d4e814a18b754f9afbb1e03bd839a5
      https://github.com/llvm/llvm-project/commit/3db0f8c895d4e814a18b754f9afbb1e03bd839a5
  Author: Alexey Bataev <a.bataev at outlook.com>
  Date:   2024-09-23 (Mon, 23 Sep 2024)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
    A llvm/test/Transforms/SLPVectorizer/X86/reduced-value-vectorized-later.ll

  Log Message:
  -----------
  [SLP]Update TrackedToOrig mappings after reduction vectorization

Need to update mappings in TrackedToOrig to correctly provide mapping
between updated reduced value after vectorization and its original
value, otherwise the compiler might miss this update and it may cause
compiler crash later, when it tries to find the original instruction
mapping for the updated value.

Fixes https://github.com/llvm/llvm-project/issues/109376



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