[all-commits] [llvm/llvm-project] fd6524: [VPlan] Handle AtomicRMW/AtomicCmpXchg/Fence in ou...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: fd6524963bf1ec6b4d2c688337af8f9f41562575
      https://github.com/llvm/llvm-project/commit/fd6524963bf1ec6b4d2c688337af8f9f41562575
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2026-07-12 (Sun, 12 Jul 2026)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
    M llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
    A llvm/test/Transforms/LoopVectorize/outer-loop-atomic.ll

  Log Message:
  -----------
  [VPlan] Handle AtomicRMW/AtomicCmpXchg/Fence in outer loop creation. (#209031)

Teach VPInstruction::getNumOperandsForOpcode about AtomicRMW,
AtomicCmpXchg and Fence, so VPlan construction over an outer loop that
still contains these operations does not crash before later legality
rejects the loop.

Fixes crashes in the added tests.



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