[all-commits] [llvm/llvm-project] 893170: AMDGPU: Mark sendmsg intrinsics as norecurse

[Matt Arsenault via All-commits]

  Branch: refs/heads/users/arsenm/issue124802/mark-sendmsg-norecurse
  Home:   https://github.com/llvm/llvm-project
  Commit: 8931702f8e986e73835d2daf306aa05c94c128be
      https://github.com/llvm/llvm-project/commit/8931702f8e986e73835d2daf306aa05c94c128be
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2025-01-30 (Thu, 30 Jan 2025)

  Changed paths:
    M llvm/include/llvm/IR/IntrinsicsAMDGPU.td
    A llvm/test/Transforms/FunctionAttrs/sendmsg-norecurse.ll

  Log Message:
  -----------
  AMDGPU: Mark sendmsg intrinsics as norecurse

We cannot mark these as nocallback or nosync. These send a message
to a host thread which could trigger arbitrary code. However this
signaled code can't directly cause this thread to start recursing.

FunctionAttrs manages to propagate norecurse to the caller, but
attributor does not.

Fixes #124802



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