[all-commits] [llvm/llvm-project] c7053a: [SandboxVec][BottomUpVec] Disable crossing BBs (#1...

[vporpo via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c7053ac202de1723c49d2f02d1c56d7a0a4481c0
      https://github.com/llvm/llvm-project/commit/c7053ac202de1723c49d2f02d1c56d7a0a4481c0
  Author: vporpo <vporpodas at google.com>
  Date:   2025-01-23 (Thu, 23 Jan 2025)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/SandboxVectorizer/DependencyGraph.cpp
    M llvm/lib/Transforms/Vectorize/SandboxVectorizer/Passes/BottomUpVec.cpp
    M llvm/lib/Transforms/Vectorize/SandboxVectorizer/Scheduler.cpp
    A llvm/test/Transforms/SandboxVectorizer/cross_bbs.ll

  Log Message:
  -----------
  [SandboxVec][BottomUpVec] Disable crossing BBs (#124039)

Crossing BBs is not currently supported by the structures of the
vectorizer. This patch fixes instances where this was happening,
including:
- a walk of use-def operands that updates the UnscheduledSuccs counter,
- the dead instruction removal is now done per BB,
- the scheduler, which will reject bundles that cross BBs.



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