[all-commits] [llvm/llvm-project] b41987: [SandboxVec][DAG] Fix MemDGNode chain maintenance ...

[vporpo via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: b41987beaedaa6ea78fd8dd11ba8c3b21eb8fa88
      https://github.com/llvm/llvm-project/commit/b41987beaedaa6ea78fd8dd11ba8c3b21eb8fa88
  Author: vporpo <vporpodas at google.com>
  Date:   2025-01-24 (Fri, 24 Jan 2025)

  Changed paths:
    M llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/DependencyGraph.h
    M llvm/lib/Transforms/Vectorize/SandboxVectorizer/DependencyGraph.cpp
    M llvm/unittests/Transforms/Vectorize/SandboxVectorizer/DependencyGraphTest.cpp

  Log Message:
  -----------
  [SandboxVec][DAG] Fix MemDGNode chain maintenance when move destination is non-mem (#124227)

This patch fixes a bug in the maintenance of the MemDGNode chain of the
DAG. Whenever we move a memory instruction, the DAG gets notified about
the move and maintains the chain of memory nodes. The bug was that if
the destination of the move was not a memory instruction, then the
memory node's next node would end up pointing to itself.



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