[paul1106]

Context

This PR supersedes #21630.

The original PR was closed due to CLA issues.
This new PR is created from a new branch to track CLA status and continue the review process.

Please refer to #21630 for previous review comments and discussion.

Summary:

• The pop of QCOM_AXIS_ORDER was previously done in
  QnnBackend._build_op_wrappers before calling
  transform_for_preprocess_pipeline. Moving it into
  LayoutTransform.call() when insert_permute=True keeps the cleanup
  logic co-located with the code that depends on it.

• The pop is necessary because the delegated subgraph is created via
  deepcopy, which carries over the QCOM_AXIS_ORDER tags written by the
  to-edge LayoutTransform run. Without clearing them, is_transformed_node()
  returns True for every sensitive node in the
  main for-loop, causing all traversals to be skipped and no permute
  nodes to be inserted.

Test plan

python -m backends.qualcomm.tests.test_qnn_delegate TestQNNQuantizedOperator  --device ${SERIAL_NUM}   --soc_model ${SOC_MODEL}   --build_folder build-android   --executorch_root .

cc @cccclai @winskuo-quic @shewu-quic @haowhsu-quic @DannyYuyang-quic @cbilgin @abhinaykukkadapu @psiddh

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/21932

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❌ 1 New Failure, 1 Unrelated Failure

As of commit e209ca4 with merge base 273cb33 ():

NEW FAILURE - The following job has failed:

• Cadence Build & Test / Resolve CI docker image / resolve (gh)
  ##[error]Refusing to check out fork pull request code from a 'pull_request_target' workflow. This workflow runs with the base repository's GITHUB_TOKEN, secrets, default-branch cache scope, and runner access. Fetching and executing a fork's code in that trusted context commonly leads to "pwn request" vulnerabilities. To opt in, review the risks at https://gh.io/securely-using-pull_request_target and set 'allow-unsafe-pr-checkout: true' on the actions/checkout step.

BROKEN TRUNK - The following job failed but were present on the merge base:

👉 Rebase onto the `viable/strict` branch to avoid these failures

• pull / test-arm-backend-no-driver (test_pytest_models_tosa) / linux-job (gh) (trunk failure)
  RuntimeError: Command bash /__w/_temp/exec_script failed with exit code 1

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[meta-cla]

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[github-actions]

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[Copilot]

Pull request overview

This PR relocates cleanup of the QCOM_AXIS_ORDER node metadata from QnnBackend._build_op_wrappers into the LayoutTransform pass itself (specifically when insert_permute=True), so the metadata invalidation happens next to the logic that depends on it. This prevents inherited QCOM_AXIS_ORDER tags (carried via deepcopy) from making LayoutTransform.is_transformed_node() incorrectly treat all sensitive nodes as already-processed, which would otherwise suppress permute insertion during preprocessing.

Changes:

• Remove the QCOM_AXIS_ORDER metadata pop from backends/qualcomm/qnn_preprocess.py preprocessing entrypoint.
• Add a targeted QCOM_AXIS_ORDER metadata pop inside LayoutTransform.call() when running the permute-inserting mode (insert_permute=True).

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
backends/qualcomm/qnn_preprocess.py	Removes early QCOM_AXIS_ORDER meta cleanup from _build_op_wrappers, delegating it to the pass that relies on it.
backends/qualcomm/_passes/layout_transform.py	Clears inherited QCOM_AXIS_ORDER tags before the main sensitive-node traversal when insert_permute=True, ensuring permute insertion logic executes.

---

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[paul1106]

This PR supersedes #21630.

The original PR was closed due to CLA issues.
This new PR is created from a new branch to track CLA status and continue the review process.

Please refer to #21630 for previous review comments and discussion.

[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated no new comments.

[Copilot]

Copilot review overview

🟢 Approval recommended

No unresolved review issues were identified.

Review effort: Lite
Findings: None

[shewu-quic]

Hi @psiddh,
@paul1106 is our intern and will be assisting us with related tasks.
He has rebased PR and signed EasyCLA.
Could you please check whether he has any CLA issues?

[psiddh]

MetaCLA Is no longer needed, merginf