[all-commits] [llvm/llvm-project] 38f3db: use default intrinsic attrs for BPF packet loads

[Bryce Kahle via All-commits]

  Branch: refs/heads/release/19.x
  Home:   https://github.com/llvm/llvm-project
  Commit: 38f3dbefab0a4965abad99aa23eced96d5d8dc16
      https://github.com/llvm/llvm-project/commit/38f3dbefab0a4965abad99aa23eced96d5d8dc16
  Author: Bryce Kahle <bryce.kahle at datadoghq.com>
  Date:   2024-08-26 (Mon, 26 Aug 2024)

  Changed paths:
    M llvm/include/llvm/IR/IntrinsicsBPF.td
    M llvm/test/CodeGen/BPF/sockex2.ll
    A llvm/test/Transforms/DCE/intrinsics-bpf.ll

  Log Message:
  -----------
  use default intrinsic attrs for BPF packet loads

The BPF packet load intrinsics lost attribute WillReturn due to 0b20c30. The attribute loss causes excessive bitshifting, resulting in previously working programs failing the BPF verifier due to instruction/complexity limits.

cherry picked only the BPF changes from 99a10f1

Signed-off-by: Bryce Kahle <bryce.kahle at datadoghq.com>



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