MLX delegate: add integer support for aten.bitwise_not

[AlessandroVacca]

Summary

Fixes#18924
Extends aten.bitwise_not support in the MLX delegate to handle integer tensors, not just boolean tensors.
Previously the handler only dispatched to LogicalNotNode for bool and raised NotImplementedError for all other dtypes. This adds a dedicated BitwiseInvertNode backed by mlx::core::bitwise_invert, and updates the handler to dispatch based on dtype:

• bool → LogicalNotNode (unchanged)
• int32, int64 → BitwiseInvertNode

Changes:

• serialization/schema.fbs: add BitwiseInvertNode table and append to OpNode union
• runtime/MLXInterpreter.h: add exec_bitwise_invert() and dispatch case
• ops.py: update _bitwise_not_handler to dispatch to BitwiseInvertNode for integers
• test/test_ops.py: add bitwise_not_int test for int32 and int64

Test plan

All tests were ran on a machine with an Apple M1 Pro CPU, macOS 26.4.1.

• python3 -m py_compile backends/mlx/ops.py backends/mlx/test/test_ops.py
• python3 backends/mlx/serialization/generate.py
• python3 -m executorch.backends.mlx.test.run_all_tests bitwise_not_int

Test output

============================================================
TEST SUMMARY
============================================================
Passed: 6
Failed: 0
============================================================

cc @metascroy

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/19053

• 📄 Preview Python docs built from this PR

Note: Links to docs will display an error until the docs builds have been completed.

❗ 1 Active SEVs

There are 1 currently active SEVs. If your PR is affected, please view them below:

• Rolling out OSDC (ARC) runners on pull & trunk workflows in PyTorch main

❌ 14 New Failures, 15 Pending, 5 Unrelated Failures

As of commit bbe7c56 with merge base 56da964 ():

NEW FAILURES - The following jobs have failed:

• Cadence Build & Test / cpu-test / test-aot / test-aot (gh)
  backends/cadence/aot/tests/test_replace_ops_passes.py::TestReplaceOpsPasses::test_replace_transposed_conv_with_linear_4
• MLX / test-mlx-llm (unsloth/gemma-3-1b-it, gemma3-1b, false, 4w) / test-mlx-llm-gemma3-1b-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/gemma-3-1b-it, gemma3-1b, false, nvfp4) / test-mlx-llm-gemma3-1b-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/gemma-3-1b-it, gemma3-1b, true, 4w) / test-mlx-llm-gemma3-1b-custom-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/gemma-3-1b-it, gemma3-1b, true, nvfp4) / test-mlx-llm-gemma3-1b-custom-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Llama-3.2-1B-Instruct, llama-1b, false, 4w) / test-mlx-llm-llama-1b-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Llama-3.2-1B-Instruct, llama-1b, false, nvfp4) / test-mlx-llm-llama-1b-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Llama-3.2-1B-Instruct, llama-1b, true, 4w) / test-mlx-llm-llama-1b-custom-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Llama-3.2-1B-Instruct, llama-1b, true, nvfp4) / test-mlx-llm-llama-1b-custom-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Qwen3-0.6B, qwen3-0.6b, false, 4w) / test-mlx-llm-qwen3-0.6b-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Qwen3-0.6B, qwen3-0.6b, false, nvfp4) / test-mlx-llm-qwen3-0.6b-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Qwen3-0.6B, qwen3-0.6b, true, 4w) / test-mlx-llm-qwen3-0.6b-custom-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Qwen3-0.6B, qwen3-0.6b, true, nvfp4) / test-mlx-llm-qwen3-0.6b-custom-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-whisper / test-mlx-whisper (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2

FLAKY - The following jobs failed but were likely due to flakiness present on trunk:

• MLX / test-mlx-stories110m / test-mlx-stories110m (gh) (detected as infra flaky with no log or failing log classifier)
• pull / test-llama-runner-qnn-linux (fp32, qnn_8a8w, qnn) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
• pull / test-qnn-passes-linux / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
• pull / unittest-editable / windows / windows-job (gh) (detected as infra flaky with no log or failing log classifier)
• pull / unittest-wasm-bindings (--enable-etdump) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)

This comment was automatically generated by Dr. CI and updates every 15 minutes.

[AlessandroVacca]

@pytorchbot label "release notes: apple"

[Copilot]

Pull request overview

Extends the MLX delegate’s lowering for aten.bitwise_not to support integer tensors by introducing a new BitwiseInvertNode backed by MLX bitwise_invert, while keeping the existing boolean lowering via LogicalNotNode.

Changes:

• Add BitwiseInvertNode to the FlatBuffers schema and OpNode union.
• Add MLX runtime execution support (exec_bitwise_invert) and interpreter dispatch for the new opcode.
• Update the Python op handler to emit BitwiseInvertNode for non-bool inputs and add a basic integer test case.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
backends/mlx/serialization/schema.fbs	Adds BitwiseInvertNode table and appends it to the OpNode union for serialization.
backends/mlx/runtime/MLXInterpreter.h	Implements exec_bitwise_invert() and adds interpreter dispatch for OpCode::BITWISE_INVERT.
backends/mlx/ops.py	Updates aten.bitwise_not handler to emit BitwiseInvertNode for non-bool inputs.
backends/mlx/test/test_ops.py	Adds a unary op test for integer torch.bitwise_not.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[AlessandroVacca]

I consciously decided to test only what was asked to be added, lmk if you need also the bool test case

[metascroy]

Test whatever dtypes you assert as supported in the handler.

Also, can you paste the outcome of successful test in the PR description?

[AlessandroVacca]

is the test summary in the description of the PR any good?

[nil-is-all]

@claude review this PR

[claude]

Claude encountered an error —— View job

Command failed: git fetch origin --depth=20 pull/19053/head:mlx-bitwise-not-int-c777d55e

---

I'll analyze this and get back to you.

[metascroy]

Overall looks great @AlessandroVacca! Just a few feedbacks, and then we can merge :)

[AlessandroVacca]

Should be good now! @metascroy

[Copilot]

Pull request overview

Extends the MLX delegate’s lowering for aten.bitwise_not beyond bool tensors by introducing a dedicated BitwiseInvertNode (backed by MLX bitwise_invert) and dispatching to it for supported integer dtypes.

Changes:

• Added BitwiseInvertNode to the MLX FlatBuffers schema and appended it to the OpNode union.
• Added MLX runtime execution support (exec_bitwise_invert) and interpreter dispatch for the new opcode.
• Updated the Python lowering handler to dispatch: bool -> LogicalNotNode, supported integers -> BitwiseInvertNode, otherwise fallback.
• Added a unary op test entry for integer torch.bitwise_not (currently int32/int64).

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
backends/mlx/serialization/schema.fbs	Defines BitwiseInvertNode and appends it to the OpNode union for serialization/runtime compatibility.
backends/mlx/runtime/MLXInterpreter.h	Implements and dispatches execution for the new bitwise invert op in the MLX interpreter.
backends/mlx/ops.py	Updates aten.bitwise_not lowering to route bool to logical-not and integers to bitwise-invert.
backends/mlx/test/test_ops.py	Adds a new unary op test case for integer bitwise_not.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[AlessandroVacca]

Not advertised anymore whatsoever

[Copilot]

Copilot was unable to review this pull request because the user who requested the review is ineligible. To be eligible to request a review, you need a paid Copilot license, or your organization must enable Copilot code review.

[AlessandroVacca]

Summary

Fixes#18924
Extends aten.bitwise_not support in the MLX delegate to handle integer tensors, not just boolean tensors.
Previously the handler only dispatched to LogicalNotNode for bool and raised NotImplementedError for all other dtypes. This adds a dedicated BitwiseInvertNode backed by mlx::core::bitwise_invert, and updates the handler to dispatch based on dtype:

• bool → LogicalNotNode (unchanged)
• int32, int64 → BitwiseInvertNode

Changes:

• serialization/schema.fbs: add BitwiseInvertNode table and append to OpNode union
• runtime/MLXInterpreter.h: add exec_bitwise_invert() and dispatch case
• ops.py: update _bitwise_not_handler to dispatch to BitwiseInvertNode for integers
• test/test_ops.py: add bitwise_not_int test for int32 and int64

Test plan

All tests were ran on a machine with an Apple M1 Pro CPU, macOS 26.4.1.

• python3 -m py_compile backends/mlx/ops.py backends/mlx/test/test_ops.py
• python3 backends/mlx/serialization/generate.py
• python3 -m executorch.backends.mlx.test.run_all_tests bitwise_not_int

Test output

============================================================
TEST SUMMARY
============================================================
Passed: 6
Failed: 0
============================================================

cc @metascroy

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/19053

• 📄 Preview Python docs built from this PR

Note: Links to docs will display an error until the docs builds have been completed.

❗ 1 Active SEVs

There are 1 currently active SEVs. If your PR is affected, please view them below:

• Rolling out OSDC (ARC) runners on pull & trunk workflows in PyTorch main

❌ 14 New Failures, 15 Pending, 5 Unrelated Failures

As of commit bbe7c56 with merge base 56da964 ():

NEW FAILURES - The following jobs have failed:

• Cadence Build & Test / cpu-test / test-aot / test-aot (gh)
  backends/cadence/aot/tests/test_replace_ops_passes.py::TestReplaceOpsPasses::test_replace_transposed_conv_with_linear_4
• MLX / test-mlx-llm (unsloth/gemma-3-1b-it, gemma3-1b, false, 4w) / test-mlx-llm-gemma3-1b-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/gemma-3-1b-it, gemma3-1b, false, nvfp4) / test-mlx-llm-gemma3-1b-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/gemma-3-1b-it, gemma3-1b, true, 4w) / test-mlx-llm-gemma3-1b-custom-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/gemma-3-1b-it, gemma3-1b, true, nvfp4) / test-mlx-llm-gemma3-1b-custom-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Llama-3.2-1B-Instruct, llama-1b, false, 4w) / test-mlx-llm-llama-1b-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Llama-3.2-1B-Instruct, llama-1b, false, nvfp4) / test-mlx-llm-llama-1b-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Llama-3.2-1B-Instruct, llama-1b, true, 4w) / test-mlx-llm-llama-1b-custom-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Llama-3.2-1B-Instruct, llama-1b, true, nvfp4) / test-mlx-llm-llama-1b-custom-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Qwen3-0.6B, qwen3-0.6b, false, 4w) / test-mlx-llm-qwen3-0.6b-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Qwen3-0.6B, qwen3-0.6b, false, nvfp4) / test-mlx-llm-qwen3-0.6b-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Qwen3-0.6B, qwen3-0.6b, true, 4w) / test-mlx-llm-qwen3-0.6b-custom-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Qwen3-0.6B, qwen3-0.6b, true, nvfp4) / test-mlx-llm-qwen3-0.6b-custom-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-whisper / test-mlx-whisper (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2

FLAKY - The following jobs failed but were likely due to flakiness present on trunk:

• MLX / test-mlx-stories110m / test-mlx-stories110m (gh) (detected as infra flaky with no log or failing log classifier)
• pull / test-llama-runner-qnn-linux (fp32, qnn_8a8w, qnn) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
• pull / test-qnn-passes-linux / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
• pull / unittest-editable / windows / windows-job (gh) (detected as infra flaky with no log or failing log classifier)
• pull / unittest-wasm-bindings (--enable-etdump) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)

This comment was automatically generated by Dr. CI and updates every 15 minutes.

[AlessandroVacca]

@pytorchbot label "release notes: apple"

[Copilot]

Pull request overview

Extends the MLX delegate’s lowering for aten.bitwise_not to support integer tensors by introducing a new BitwiseInvertNode backed by MLX bitwise_invert, while keeping the existing boolean lowering via LogicalNotNode.

Changes:

• Add BitwiseInvertNode to the FlatBuffers schema and OpNode union.
• Add MLX runtime execution support (exec_bitwise_invert) and interpreter dispatch for the new opcode.
• Update the Python op handler to emit BitwiseInvertNode for non-bool inputs and add a basic integer test case.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
backends/mlx/serialization/schema.fbs	Adds BitwiseInvertNode table and appends it to the OpNode union for serialization.
backends/mlx/runtime/MLXInterpreter.h	Implements exec_bitwise_invert() and adds interpreter dispatch for OpCode::BITWISE_INVERT.
backends/mlx/ops.py	Updates aten.bitwise_not handler to emit BitwiseInvertNode for non-bool inputs.
backends/mlx/test/test_ops.py	Adds a unary op test for integer torch.bitwise_not.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[AlessandroVacca]

I consciously decided to test only what was asked to be added, lmk if you need also the bool test case

[metascroy]

Test whatever dtypes you assert as supported in the handler.

Also, can you paste the outcome of successful test in the PR description?

[AlessandroVacca]

is the test summary in the description of the PR any good?

[nil-is-all]

@claude review this PR

[claude]

Claude encountered an error —— View job

Command failed: git fetch origin --depth=20 pull/19053/head:mlx-bitwise-not-int-c777d55e

---

I'll analyze this and get back to you.

[metascroy]

Overall looks great @AlessandroVacca! Just a few feedbacks, and then we can merge :)

[AlessandroVacca]

Should be good now! @metascroy

[Copilot]

Pull request overview

Extends the MLX delegate’s lowering for aten.bitwise_not beyond bool tensors by introducing a dedicated BitwiseInvertNode (backed by MLX bitwise_invert) and dispatching to it for supported integer dtypes.

Changes:

• Added BitwiseInvertNode to the MLX FlatBuffers schema and appended it to the OpNode union.
• Added MLX runtime execution support (exec_bitwise_invert) and interpreter dispatch for the new opcode.
• Updated the Python lowering handler to dispatch: bool -> LogicalNotNode, supported integers -> BitwiseInvertNode, otherwise fallback.
• Added a unary op test entry for integer torch.bitwise_not (currently int32/int64).

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
backends/mlx/serialization/schema.fbs	Defines BitwiseInvertNode and appends it to the OpNode union for serialization/runtime compatibility.
backends/mlx/runtime/MLXInterpreter.h	Implements and dispatches execution for the new bitwise invert op in the MLX interpreter.
backends/mlx/ops.py	Updates aten.bitwise_not lowering to route bool to logical-not and integers to bitwise-invert.
backends/mlx/test/test_ops.py	Adds a new unary op test case for integer bitwise_not.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[AlessandroVacca]

Not advertised anymore whatsoever

[Copilot]

Copilot was unable to review this pull request because the user who requested the review is ineligible. To be eligible to request a review, you need a paid Copilot license, or your organization must enable Copilot code review.

[AlessandroVacca]

Summary

Fixes#18924
Extends aten.bitwise_not support in the MLX delegate to handle integer tensors, not just boolean tensors.
Previously the handler only dispatched to LogicalNotNode for bool and raised NotImplementedError for all other dtypes. This adds a dedicated BitwiseInvertNode backed by mlx::core::bitwise_invert, and updates the handler to dispatch based on dtype:

• bool → LogicalNotNode (unchanged)
• int32, int64 → BitwiseInvertNode

Changes:

• serialization/schema.fbs: add BitwiseInvertNode table and append to OpNode union
• runtime/MLXInterpreter.h: add exec_bitwise_invert() and dispatch case
• ops.py: update _bitwise_not_handler to dispatch to BitwiseInvertNode for integers
• test/test_ops.py: add bitwise_not_int test for int32 and int64

Test plan

All tests were ran on a machine with an Apple M1 Pro CPU, macOS 26.4.1.

• python3 -m py_compile backends/mlx/ops.py backends/mlx/test/test_ops.py
• python3 backends/mlx/serialization/generate.py
• python3 -m executorch.backends.mlx.test.run_all_tests bitwise_not_int

Test output

============================================================
TEST SUMMARY
============================================================
Passed: 6
Failed: 0
============================================================

cc @metascroy

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/19053

• 📄 Preview Python docs built from this PR

Note: Links to docs will display an error until the docs builds have been completed.

❗ 1 Active SEVs

There are 1 currently active SEVs. If your PR is affected, please view them below:

• Rolling out OSDC (ARC) runners on pull & trunk workflows in PyTorch main

❌ 14 New Failures, 15 Pending, 5 Unrelated Failures

As of commit bbe7c56 with merge base 56da964 ():

NEW FAILURES - The following jobs have failed:

• Cadence Build & Test / cpu-test / test-aot / test-aot (gh)
  backends/cadence/aot/tests/test_replace_ops_passes.py::TestReplaceOpsPasses::test_replace_transposed_conv_with_linear_4
• MLX / test-mlx-llm (unsloth/gemma-3-1b-it, gemma3-1b, false, 4w) / test-mlx-llm-gemma3-1b-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/gemma-3-1b-it, gemma3-1b, false, nvfp4) / test-mlx-llm-gemma3-1b-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/gemma-3-1b-it, gemma3-1b, true, 4w) / test-mlx-llm-gemma3-1b-custom-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/gemma-3-1b-it, gemma3-1b, true, nvfp4) / test-mlx-llm-gemma3-1b-custom-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Llama-3.2-1B-Instruct, llama-1b, false, 4w) / test-mlx-llm-llama-1b-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Llama-3.2-1B-Instruct, llama-1b, false, nvfp4) / test-mlx-llm-llama-1b-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Llama-3.2-1B-Instruct, llama-1b, true, 4w) / test-mlx-llm-llama-1b-custom-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Llama-3.2-1B-Instruct, llama-1b, true, nvfp4) / test-mlx-llm-llama-1b-custom-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Qwen3-0.6B, qwen3-0.6b, false, 4w) / test-mlx-llm-qwen3-0.6b-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Qwen3-0.6B, qwen3-0.6b, false, nvfp4) / test-mlx-llm-qwen3-0.6b-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Qwen3-0.6B, qwen3-0.6b, true, 4w) / test-mlx-llm-qwen3-0.6b-custom-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Qwen3-0.6B, qwen3-0.6b, true, nvfp4) / test-mlx-llm-qwen3-0.6b-custom-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-whisper / test-mlx-whisper (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2

FLAKY - The following jobs failed but were likely due to flakiness present on trunk:

• MLX / test-mlx-stories110m / test-mlx-stories110m (gh) (detected as infra flaky with no log or failing log classifier)
• pull / test-llama-runner-qnn-linux (fp32, qnn_8a8w, qnn) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
• pull / test-qnn-passes-linux / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
• pull / unittest-editable / windows / windows-job (gh) (detected as infra flaky with no log or failing log classifier)
• pull / unittest-wasm-bindings (--enable-etdump) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)

This comment was automatically generated by Dr. CI and updates every 15 minutes.

[AlessandroVacca]

@pytorchbot label "release notes: apple"

[Copilot]

Pull request overview

Extends the MLX delegate’s lowering for aten.bitwise_not to support integer tensors by introducing a new BitwiseInvertNode backed by MLX bitwise_invert, while keeping the existing boolean lowering via LogicalNotNode.

Changes:

• Add BitwiseInvertNode to the FlatBuffers schema and OpNode union.
• Add MLX runtime execution support (exec_bitwise_invert) and interpreter dispatch for the new opcode.
• Update the Python op handler to emit BitwiseInvertNode for non-bool inputs and add a basic integer test case.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
backends/mlx/serialization/schema.fbs	Adds BitwiseInvertNode table and appends it to the OpNode union for serialization.
backends/mlx/runtime/MLXInterpreter.h	Implements exec_bitwise_invert() and adds interpreter dispatch for OpCode::BITWISE_INVERT.
backends/mlx/ops.py	Updates aten.bitwise_not handler to emit BitwiseInvertNode for non-bool inputs.
backends/mlx/test/test_ops.py	Adds a unary op test for integer torch.bitwise_not.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[AlessandroVacca]

I consciously decided to test only what was asked to be added, lmk if you need also the bool test case

[metascroy]

Test whatever dtypes you assert as supported in the handler.

Also, can you paste the outcome of successful test in the PR description?

[AlessandroVacca]

is the test summary in the description of the PR any good?

[nil-is-all]

@claude review this PR

[claude]

Claude encountered an error —— View job

Command failed: git fetch origin --depth=20 pull/19053/head:mlx-bitwise-not-int-c777d55e

---

I'll analyze this and get back to you.

[metascroy]

Overall looks great @AlessandroVacca! Just a few feedbacks, and then we can merge :)

[AlessandroVacca]

Should be good now! @metascroy

[Copilot]

Pull request overview

Extends the MLX delegate’s lowering for aten.bitwise_not beyond bool tensors by introducing a dedicated BitwiseInvertNode (backed by MLX bitwise_invert) and dispatching to it for supported integer dtypes.

Changes:

• Added BitwiseInvertNode to the MLX FlatBuffers schema and appended it to the OpNode union.
• Added MLX runtime execution support (exec_bitwise_invert) and interpreter dispatch for the new opcode.
• Updated the Python lowering handler to dispatch: bool -> LogicalNotNode, supported integers -> BitwiseInvertNode, otherwise fallback.
• Added a unary op test entry for integer torch.bitwise_not (currently int32/int64).

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
backends/mlx/serialization/schema.fbs	Defines BitwiseInvertNode and appends it to the OpNode union for serialization/runtime compatibility.
backends/mlx/runtime/MLXInterpreter.h	Implements and dispatches execution for the new bitwise invert op in the MLX interpreter.
backends/mlx/ops.py	Updates aten.bitwise_not lowering to route bool to logical-not and integers to bitwise-invert.
backends/mlx/test/test_ops.py	Adds a new unary op test case for integer bitwise_not.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[AlessandroVacca]

Not advertised anymore whatsoever

[Copilot]

Copilot was unable to review this pull request because the user who requested the review is ineligible. To be eligible to request a review, you need a paid Copilot license, or your organization must enable Copilot code review.

[AlessandroVacca]

Summary

Fixes#18924
Extends aten.bitwise_not support in the MLX delegate to handle integer tensors, not just boolean tensors.
Previously the handler only dispatched to LogicalNotNode for bool and raised NotImplementedError for all other dtypes. This adds a dedicated BitwiseInvertNode backed by mlx::core::bitwise_invert, and updates the handler to dispatch based on dtype:

• bool → LogicalNotNode (unchanged)
• int32, int64 → BitwiseInvertNode

Changes:

• serialization/schema.fbs: add BitwiseInvertNode table and append to OpNode union
• runtime/MLXInterpreter.h: add exec_bitwise_invert() and dispatch case
• ops.py: update _bitwise_not_handler to dispatch to BitwiseInvertNode for integers
• test/test_ops.py: add bitwise_not_int test for int32 and int64

Test plan

All tests were ran on a machine with an Apple M1 Pro CPU, macOS 26.4.1.

• python3 -m py_compile backends/mlx/ops.py backends/mlx/test/test_ops.py
• python3 backends/mlx/serialization/generate.py
• python3 -m executorch.backends.mlx.test.run_all_tests bitwise_not_int

Test output

============================================================
TEST SUMMARY
============================================================
Passed: 6
Failed: 0
============================================================

cc @metascroy

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/19053

• 📄 Preview Python docs built from this PR

Note: Links to docs will display an error until the docs builds have been completed.

❗ 1 Active SEVs

There are 1 currently active SEVs. If your PR is affected, please view them below:

• Rolling out OSDC (ARC) runners on pull & trunk workflows in PyTorch main

❌ 14 New Failures, 15 Pending, 5 Unrelated Failures

As of commit bbe7c56 with merge base 56da964 ():

NEW FAILURES - The following jobs have failed:

• Cadence Build & Test / cpu-test / test-aot / test-aot (gh)
  backends/cadence/aot/tests/test_replace_ops_passes.py::TestReplaceOpsPasses::test_replace_transposed_conv_with_linear_4
• MLX / test-mlx-llm (unsloth/gemma-3-1b-it, gemma3-1b, false, 4w) / test-mlx-llm-gemma3-1b-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/gemma-3-1b-it, gemma3-1b, false, nvfp4) / test-mlx-llm-gemma3-1b-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/gemma-3-1b-it, gemma3-1b, true, 4w) / test-mlx-llm-gemma3-1b-custom-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/gemma-3-1b-it, gemma3-1b, true, nvfp4) / test-mlx-llm-gemma3-1b-custom-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Llama-3.2-1B-Instruct, llama-1b, false, 4w) / test-mlx-llm-llama-1b-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Llama-3.2-1B-Instruct, llama-1b, false, nvfp4) / test-mlx-llm-llama-1b-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Llama-3.2-1B-Instruct, llama-1b, true, 4w) / test-mlx-llm-llama-1b-custom-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Llama-3.2-1B-Instruct, llama-1b, true, nvfp4) / test-mlx-llm-llama-1b-custom-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Qwen3-0.6B, qwen3-0.6b, false, 4w) / test-mlx-llm-qwen3-0.6b-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Qwen3-0.6B, qwen3-0.6b, false, nvfp4) / test-mlx-llm-qwen3-0.6b-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Qwen3-0.6B, qwen3-0.6b, true, 4w) / test-mlx-llm-qwen3-0.6b-custom-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Qwen3-0.6B, qwen3-0.6b, true, nvfp4) / test-mlx-llm-qwen3-0.6b-custom-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-whisper / test-mlx-whisper (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2

FLAKY - The following jobs failed but were likely due to flakiness present on trunk:

• MLX / test-mlx-stories110m / test-mlx-stories110m (gh) (detected as infra flaky with no log or failing log classifier)
• pull / test-llama-runner-qnn-linux (fp32, qnn_8a8w, qnn) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
• pull / test-qnn-passes-linux / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
• pull / unittest-editable / windows / windows-job (gh) (detected as infra flaky with no log or failing log classifier)
• pull / unittest-wasm-bindings (--enable-etdump) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)

This comment was automatically generated by Dr. CI and updates every 15 minutes.

[AlessandroVacca]

@pytorchbot label "release notes: apple"

[Copilot]

Pull request overview

Extends the MLX delegate’s lowering for aten.bitwise_not to support integer tensors by introducing a new BitwiseInvertNode backed by MLX bitwise_invert, while keeping the existing boolean lowering via LogicalNotNode.

Changes:

• Add BitwiseInvertNode to the FlatBuffers schema and OpNode union.
• Add MLX runtime execution support (exec_bitwise_invert) and interpreter dispatch for the new opcode.
• Update the Python op handler to emit BitwiseInvertNode for non-bool inputs and add a basic integer test case.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
backends/mlx/serialization/schema.fbs	Adds BitwiseInvertNode table and appends it to the OpNode union for serialization.
backends/mlx/runtime/MLXInterpreter.h	Implements exec_bitwise_invert() and adds interpreter dispatch for OpCode::BITWISE_INVERT.
backends/mlx/ops.py	Updates aten.bitwise_not handler to emit BitwiseInvertNode for non-bool inputs.
backends/mlx/test/test_ops.py	Adds a unary op test for integer torch.bitwise_not.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[AlessandroVacca]

I consciously decided to test only what was asked to be added, lmk if you need also the bool test case

[metascroy]

Test whatever dtypes you assert as supported in the handler.

Also, can you paste the outcome of successful test in the PR description?

[AlessandroVacca]

is the test summary in the description of the PR any good?

[nil-is-all]

@claude review this PR

[claude]

Claude encountered an error —— View job

Command failed: git fetch origin --depth=20 pull/19053/head:mlx-bitwise-not-int-c777d55e

---

I'll analyze this and get back to you.

[metascroy]

Overall looks great @AlessandroVacca! Just a few feedbacks, and then we can merge :)

[AlessandroVacca]

Should be good now! @metascroy

[Copilot]

Pull request overview

Extends the MLX delegate’s lowering for aten.bitwise_not beyond bool tensors by introducing a dedicated BitwiseInvertNode (backed by MLX bitwise_invert) and dispatching to it for supported integer dtypes.

Changes:

• Added BitwiseInvertNode to the MLX FlatBuffers schema and appended it to the OpNode union.
• Added MLX runtime execution support (exec_bitwise_invert) and interpreter dispatch for the new opcode.
• Updated the Python lowering handler to dispatch: bool -> LogicalNotNode, supported integers -> BitwiseInvertNode, otherwise fallback.
• Added a unary op test entry for integer torch.bitwise_not (currently int32/int64).

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
backends/mlx/serialization/schema.fbs	Defines BitwiseInvertNode and appends it to the OpNode union for serialization/runtime compatibility.
backends/mlx/runtime/MLXInterpreter.h	Implements and dispatches execution for the new bitwise invert op in the MLX interpreter.
backends/mlx/ops.py	Updates aten.bitwise_not lowering to route bool to logical-not and integers to bitwise-invert.
backends/mlx/test/test_ops.py	Adds a new unary op test case for integer bitwise_not.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[AlessandroVacca]

Not advertised anymore whatsoever

[Copilot]

Copilot was unable to review this pull request because the user who requested the review is ineligible. To be eligible to request a review, you need a paid Copilot license, or your organization must enable Copilot code review.

[AlessandroVacca]

Summary

Fixes#18924
Extends aten.bitwise_not support in the MLX delegate to handle integer tensors, not just boolean tensors.
Previously the handler only dispatched to LogicalNotNode for bool and raised NotImplementedError for all other dtypes. This adds a dedicated BitwiseInvertNode backed by mlx::core::bitwise_invert, and updates the handler to dispatch based on dtype:

• bool → LogicalNotNode (unchanged)
• int32, int64 → BitwiseInvertNode

Changes:

• serialization/schema.fbs: add BitwiseInvertNode table and append to OpNode union
• runtime/MLXInterpreter.h: add exec_bitwise_invert() and dispatch case
• ops.py: update _bitwise_not_handler to dispatch to BitwiseInvertNode for integers
• test/test_ops.py: add bitwise_not_int test for int32 and int64

Test plan

All tests were ran on a machine with an Apple M1 Pro CPU, macOS 26.4.1.

• python3 -m py_compile backends/mlx/ops.py backends/mlx/test/test_ops.py
• python3 backends/mlx/serialization/generate.py
• python3 -m executorch.backends.mlx.test.run_all_tests bitwise_not_int

Test output

============================================================
TEST SUMMARY
============================================================
Passed: 6
Failed: 0
============================================================

cc @metascroy

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/19053

• 📄 Preview Python docs built from this PR

Note: Links to docs will display an error until the docs builds have been completed.

❗ 1 Active SEVs

There are 1 currently active SEVs. If your PR is affected, please view them below:

• Rolling out OSDC (ARC) runners on pull & trunk workflows in PyTorch main

❌ 14 New Failures, 15 Pending, 5 Unrelated Failures

As of commit bbe7c56 with merge base 56da964 ():

NEW FAILURES - The following jobs have failed:

• Cadence Build & Test / cpu-test / test-aot / test-aot (gh)
  backends/cadence/aot/tests/test_replace_ops_passes.py::TestReplaceOpsPasses::test_replace_transposed_conv_with_linear_4
• MLX / test-mlx-llm (unsloth/gemma-3-1b-it, gemma3-1b, false, 4w) / test-mlx-llm-gemma3-1b-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/gemma-3-1b-it, gemma3-1b, false, nvfp4) / test-mlx-llm-gemma3-1b-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/gemma-3-1b-it, gemma3-1b, true, 4w) / test-mlx-llm-gemma3-1b-custom-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/gemma-3-1b-it, gemma3-1b, true, nvfp4) / test-mlx-llm-gemma3-1b-custom-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Llama-3.2-1B-Instruct, llama-1b, false, 4w) / test-mlx-llm-llama-1b-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Llama-3.2-1B-Instruct, llama-1b, false, nvfp4) / test-mlx-llm-llama-1b-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Llama-3.2-1B-Instruct, llama-1b, true, 4w) / test-mlx-llm-llama-1b-custom-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Llama-3.2-1B-Instruct, llama-1b, true, nvfp4) / test-mlx-llm-llama-1b-custom-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Qwen3-0.6B, qwen3-0.6b, false, 4w) / test-mlx-llm-qwen3-0.6b-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Qwen3-0.6B, qwen3-0.6b, false, nvfp4) / test-mlx-llm-qwen3-0.6b-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Qwen3-0.6B, qwen3-0.6b, true, 4w) / test-mlx-llm-qwen3-0.6b-custom-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Qwen3-0.6B, qwen3-0.6b, true, nvfp4) / test-mlx-llm-qwen3-0.6b-custom-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-whisper / test-mlx-whisper (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2

FLAKY - The following jobs failed but were likely due to flakiness present on trunk:

• MLX / test-mlx-stories110m / test-mlx-stories110m (gh) (detected as infra flaky with no log or failing log classifier)
• pull / test-llama-runner-qnn-linux (fp32, qnn_8a8w, qnn) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
• pull / test-qnn-passes-linux / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
• pull / unittest-editable / windows / windows-job (gh) (detected as infra flaky with no log or failing log classifier)
• pull / unittest-wasm-bindings (--enable-etdump) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)

This comment was automatically generated by Dr. CI and updates every 15 minutes.

[AlessandroVacca]

@pytorchbot label "release notes: apple"

[Copilot]

Pull request overview

Extends the MLX delegate’s lowering for aten.bitwise_not to support integer tensors by introducing a new BitwiseInvertNode backed by MLX bitwise_invert, while keeping the existing boolean lowering via LogicalNotNode.

Changes:

• Add BitwiseInvertNode to the FlatBuffers schema and OpNode union.
• Add MLX runtime execution support (exec_bitwise_invert) and interpreter dispatch for the new opcode.
• Update the Python op handler to emit BitwiseInvertNode for non-bool inputs and add a basic integer test case.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
backends/mlx/serialization/schema.fbs	Adds BitwiseInvertNode table and appends it to the OpNode union for serialization.
backends/mlx/runtime/MLXInterpreter.h	Implements exec_bitwise_invert() and adds interpreter dispatch for OpCode::BITWISE_INVERT.
backends/mlx/ops.py	Updates aten.bitwise_not handler to emit BitwiseInvertNode for non-bool inputs.
backends/mlx/test/test_ops.py	Adds a unary op test for integer torch.bitwise_not.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[AlessandroVacca]

I consciously decided to test only what was asked to be added, lmk if you need also the bool test case

[metascroy]

Test whatever dtypes you assert as supported in the handler.

Also, can you paste the outcome of successful test in the PR description?

[AlessandroVacca]

is the test summary in the description of the PR any good?

[nil-is-all]

@claude review this PR

[claude]

Claude encountered an error —— View job

Command failed: git fetch origin --depth=20 pull/19053/head:mlx-bitwise-not-int-c777d55e

---

I'll analyze this and get back to you.

[metascroy]

Overall looks great @AlessandroVacca! Just a few feedbacks, and then we can merge :)

[AlessandroVacca]

Should be good now! @metascroy

[Copilot]

Pull request overview

Extends the MLX delegate’s lowering for aten.bitwise_not beyond bool tensors by introducing a dedicated BitwiseInvertNode (backed by MLX bitwise_invert) and dispatching to it for supported integer dtypes.

Changes:

• Added BitwiseInvertNode to the MLX FlatBuffers schema and appended it to the OpNode union.
• Added MLX runtime execution support (exec_bitwise_invert) and interpreter dispatch for the new opcode.
• Updated the Python lowering handler to dispatch: bool -> LogicalNotNode, supported integers -> BitwiseInvertNode, otherwise fallback.
• Added a unary op test entry for integer torch.bitwise_not (currently int32/int64).

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
backends/mlx/serialization/schema.fbs	Defines BitwiseInvertNode and appends it to the OpNode union for serialization/runtime compatibility.
backends/mlx/runtime/MLXInterpreter.h	Implements and dispatches execution for the new bitwise invert op in the MLX interpreter.
backends/mlx/ops.py	Updates aten.bitwise_not lowering to route bool to logical-not and integers to bitwise-invert.
backends/mlx/test/test_ops.py	Adds a new unary op test case for integer bitwise_not.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[AlessandroVacca]

Not advertised anymore whatsoever

[Copilot]

Copilot was unable to review this pull request because the user who requested the review is ineligible. To be eligible to request a review, you need a paid Copilot license, or your organization must enable Copilot code review.

[AlessandroVacca]

Summary

Fixes#18924
Extends aten.bitwise_not support in the MLX delegate to handle integer tensors, not just boolean tensors.
Previously the handler only dispatched to LogicalNotNode for bool and raised NotImplementedError for all other dtypes. This adds a dedicated BitwiseInvertNode backed by mlx::core::bitwise_invert, and updates the handler to dispatch based on dtype:

• bool → LogicalNotNode (unchanged)
• int32, int64 → BitwiseInvertNode

Changes:

• serialization/schema.fbs: add BitwiseInvertNode table and append to OpNode union
• runtime/MLXInterpreter.h: add exec_bitwise_invert() and dispatch case
• ops.py: update _bitwise_not_handler to dispatch to BitwiseInvertNode for integers
• test/test_ops.py: add bitwise_not_int test for int32 and int64

Test plan

All tests were ran on a machine with an Apple M1 Pro CPU, macOS 26.4.1.

• python3 -m py_compile backends/mlx/ops.py backends/mlx/test/test_ops.py
• python3 backends/mlx/serialization/generate.py
• python3 -m executorch.backends.mlx.test.run_all_tests bitwise_not_int

Test output

============================================================
TEST SUMMARY
============================================================
Passed: 6
Failed: 0
============================================================

cc @metascroy

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/19053

• 📄 Preview Python docs built from this PR

Note: Links to docs will display an error until the docs builds have been completed.

❗ 1 Active SEVs

There are 1 currently active SEVs. If your PR is affected, please view them below:

• Rolling out OSDC (ARC) runners on pull & trunk workflows in PyTorch main

❌ 14 New Failures, 15 Pending, 5 Unrelated Failures

As of commit bbe7c56 with merge base 56da964 ():

NEW FAILURES - The following jobs have failed:

• Cadence Build & Test / cpu-test / test-aot / test-aot (gh)
  backends/cadence/aot/tests/test_replace_ops_passes.py::TestReplaceOpsPasses::test_replace_transposed_conv_with_linear_4
• MLX / test-mlx-llm (unsloth/gemma-3-1b-it, gemma3-1b, false, 4w) / test-mlx-llm-gemma3-1b-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/gemma-3-1b-it, gemma3-1b, false, nvfp4) / test-mlx-llm-gemma3-1b-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/gemma-3-1b-it, gemma3-1b, true, 4w) / test-mlx-llm-gemma3-1b-custom-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/gemma-3-1b-it, gemma3-1b, true, nvfp4) / test-mlx-llm-gemma3-1b-custom-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Llama-3.2-1B-Instruct, llama-1b, false, 4w) / test-mlx-llm-llama-1b-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Llama-3.2-1B-Instruct, llama-1b, false, nvfp4) / test-mlx-llm-llama-1b-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Llama-3.2-1B-Instruct, llama-1b, true, 4w) / test-mlx-llm-llama-1b-custom-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Llama-3.2-1B-Instruct, llama-1b, true, nvfp4) / test-mlx-llm-llama-1b-custom-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Qwen3-0.6B, qwen3-0.6b, false, 4w) / test-mlx-llm-qwen3-0.6b-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Qwen3-0.6B, qwen3-0.6b, false, nvfp4) / test-mlx-llm-qwen3-0.6b-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Qwen3-0.6B, qwen3-0.6b, true, 4w) / test-mlx-llm-qwen3-0.6b-custom-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Qwen3-0.6B, qwen3-0.6b, true, nvfp4) / test-mlx-llm-qwen3-0.6b-custom-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-whisper / test-mlx-whisper (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2

FLAKY - The following jobs failed but were likely due to flakiness present on trunk:

• MLX / test-mlx-stories110m / test-mlx-stories110m (gh) (detected as infra flaky with no log or failing log classifier)
• pull / test-llama-runner-qnn-linux (fp32, qnn_8a8w, qnn) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
• pull / test-qnn-passes-linux / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
• pull / unittest-editable / windows / windows-job (gh) (detected as infra flaky with no log or failing log classifier)
• pull / unittest-wasm-bindings (--enable-etdump) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)

This comment was automatically generated by Dr. CI and updates every 15 minutes.

[AlessandroVacca]

@pytorchbot label "release notes: apple"

[Copilot]

Pull request overview

Extends the MLX delegate’s lowering for aten.bitwise_not to support integer tensors by introducing a new BitwiseInvertNode backed by MLX bitwise_invert, while keeping the existing boolean lowering via LogicalNotNode.

Changes:

• Add BitwiseInvertNode to the FlatBuffers schema and OpNode union.
• Add MLX runtime execution support (exec_bitwise_invert) and interpreter dispatch for the new opcode.
• Update the Python op handler to emit BitwiseInvertNode for non-bool inputs and add a basic integer test case.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
backends/mlx/serialization/schema.fbs	Adds BitwiseInvertNode table and appends it to the OpNode union for serialization.
backends/mlx/runtime/MLXInterpreter.h	Implements exec_bitwise_invert() and adds interpreter dispatch for OpCode::BITWISE_INVERT.
backends/mlx/ops.py	Updates aten.bitwise_not handler to emit BitwiseInvertNode for non-bool inputs.
backends/mlx/test/test_ops.py	Adds a unary op test for integer torch.bitwise_not.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[AlessandroVacca]

I consciously decided to test only what was asked to be added, lmk if you need also the bool test case

[metascroy]

Test whatever dtypes you assert as supported in the handler.

Also, can you paste the outcome of successful test in the PR description?

[AlessandroVacca]

is the test summary in the description of the PR any good?

[nil-is-all]

@claude review this PR

[claude]

Claude encountered an error —— View job

Command failed: git fetch origin --depth=20 pull/19053/head:mlx-bitwise-not-int-c777d55e

---

I'll analyze this and get back to you.

[metascroy]

Overall looks great @AlessandroVacca! Just a few feedbacks, and then we can merge :)

[AlessandroVacca]

Should be good now! @metascroy

[Copilot]

Pull request overview

Extends the MLX delegate’s lowering for aten.bitwise_not beyond bool tensors by introducing a dedicated BitwiseInvertNode (backed by MLX bitwise_invert) and dispatching to it for supported integer dtypes.

Changes:

• Added BitwiseInvertNode to the MLX FlatBuffers schema and appended it to the OpNode union.
• Added MLX runtime execution support (exec_bitwise_invert) and interpreter dispatch for the new opcode.
• Updated the Python lowering handler to dispatch: bool -> LogicalNotNode, supported integers -> BitwiseInvertNode, otherwise fallback.
• Added a unary op test entry for integer torch.bitwise_not (currently int32/int64).

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
backends/mlx/serialization/schema.fbs	Defines BitwiseInvertNode and appends it to the OpNode union for serialization/runtime compatibility.
backends/mlx/runtime/MLXInterpreter.h	Implements and dispatches execution for the new bitwise invert op in the MLX interpreter.
backends/mlx/ops.py	Updates aten.bitwise_not lowering to route bool to logical-not and integers to bitwise-invert.
backends/mlx/test/test_ops.py	Adds a new unary op test case for integer bitwise_not.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[AlessandroVacca]

Not advertised anymore whatsoever

[Copilot]

Copilot was unable to review this pull request because the user who requested the review is ineligible. To be eligible to request a review, you need a paid Copilot license, or your organization must enable Copilot code review.

[AlessandroVacca]

Summary

Fixes#18924
Extends aten.bitwise_not support in the MLX delegate to handle integer tensors, not just boolean tensors.
Previously the handler only dispatched to LogicalNotNode for bool and raised NotImplementedError for all other dtypes. This adds a dedicated BitwiseInvertNode backed by mlx::core::bitwise_invert, and updates the handler to dispatch based on dtype:

• bool → LogicalNotNode (unchanged)
• int32, int64 → BitwiseInvertNode

Changes:

• serialization/schema.fbs: add BitwiseInvertNode table and append to OpNode union
• runtime/MLXInterpreter.h: add exec_bitwise_invert() and dispatch case
• ops.py: update _bitwise_not_handler to dispatch to BitwiseInvertNode for integers
• test/test_ops.py: add bitwise_not_int test for int32 and int64

Test plan

All tests were ran on a machine with an Apple M1 Pro CPU, macOS 26.4.1.

• python3 -m py_compile backends/mlx/ops.py backends/mlx/test/test_ops.py
• python3 backends/mlx/serialization/generate.py
• python3 -m executorch.backends.mlx.test.run_all_tests bitwise_not_int

Test output

============================================================
TEST SUMMARY
============================================================
Passed: 6
Failed: 0
============================================================

cc @metascroy

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/19053

• 📄 Preview Python docs built from this PR

Note: Links to docs will display an error until the docs builds have been completed.

❗ 1 Active SEVs

There are 1 currently active SEVs. If your PR is affected, please view them below:

• Rolling out OSDC (ARC) runners on pull & trunk workflows in PyTorch main

❌ 14 New Failures, 15 Pending, 5 Unrelated Failures

As of commit bbe7c56 with merge base 56da964 ():

NEW FAILURES - The following jobs have failed:

• Cadence Build & Test / cpu-test / test-aot / test-aot (gh)
  backends/cadence/aot/tests/test_replace_ops_passes.py::TestReplaceOpsPasses::test_replace_transposed_conv_with_linear_4
• MLX / test-mlx-llm (unsloth/gemma-3-1b-it, gemma3-1b, false, 4w) / test-mlx-llm-gemma3-1b-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/gemma-3-1b-it, gemma3-1b, false, nvfp4) / test-mlx-llm-gemma3-1b-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/gemma-3-1b-it, gemma3-1b, true, 4w) / test-mlx-llm-gemma3-1b-custom-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/gemma-3-1b-it, gemma3-1b, true, nvfp4) / test-mlx-llm-gemma3-1b-custom-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Llama-3.2-1B-Instruct, llama-1b, false, 4w) / test-mlx-llm-llama-1b-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Llama-3.2-1B-Instruct, llama-1b, false, nvfp4) / test-mlx-llm-llama-1b-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Llama-3.2-1B-Instruct, llama-1b, true, 4w) / test-mlx-llm-llama-1b-custom-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Llama-3.2-1B-Instruct, llama-1b, true, nvfp4) / test-mlx-llm-llama-1b-custom-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Qwen3-0.6B, qwen3-0.6b, false, 4w) / test-mlx-llm-qwen3-0.6b-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Qwen3-0.6B, qwen3-0.6b, false, nvfp4) / test-mlx-llm-qwen3-0.6b-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Qwen3-0.6B, qwen3-0.6b, true, 4w) / test-mlx-llm-qwen3-0.6b-custom-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Qwen3-0.6B, qwen3-0.6b, true, nvfp4) / test-mlx-llm-qwen3-0.6b-custom-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-whisper / test-mlx-whisper (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2

FLAKY - The following jobs failed but were likely due to flakiness present on trunk:

• MLX / test-mlx-stories110m / test-mlx-stories110m (gh) (detected as infra flaky with no log or failing log classifier)
• pull / test-llama-runner-qnn-linux (fp32, qnn_8a8w, qnn) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
• pull / test-qnn-passes-linux / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
• pull / unittest-editable / windows / windows-job (gh) (detected as infra flaky with no log or failing log classifier)
• pull / unittest-wasm-bindings (--enable-etdump) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)

This comment was automatically generated by Dr. CI and updates every 15 minutes.

[AlessandroVacca]

@pytorchbot label "release notes: apple"

[Copilot]

Pull request overview

Extends the MLX delegate’s lowering for aten.bitwise_not to support integer tensors by introducing a new BitwiseInvertNode backed by MLX bitwise_invert, while keeping the existing boolean lowering via LogicalNotNode.

Changes:

• Add BitwiseInvertNode to the FlatBuffers schema and OpNode union.
• Add MLX runtime execution support (exec_bitwise_invert) and interpreter dispatch for the new opcode.
• Update the Python op handler to emit BitwiseInvertNode for non-bool inputs and add a basic integer test case.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
backends/mlx/serialization/schema.fbs	Adds BitwiseInvertNode table and appends it to the OpNode union for serialization.
backends/mlx/runtime/MLXInterpreter.h	Implements exec_bitwise_invert() and adds interpreter dispatch for OpCode::BITWISE_INVERT.
backends/mlx/ops.py	Updates aten.bitwise_not handler to emit BitwiseInvertNode for non-bool inputs.
backends/mlx/test/test_ops.py	Adds a unary op test for integer torch.bitwise_not.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[AlessandroVacca]

I consciously decided to test only what was asked to be added, lmk if you need also the bool test case

[metascroy]

Test whatever dtypes you assert as supported in the handler.

Also, can you paste the outcome of successful test in the PR description?

[AlessandroVacca]

is the test summary in the description of the PR any good?

[nil-is-all]

@claude review this PR

[claude]

Claude encountered an error —— View job

Command failed: git fetch origin --depth=20 pull/19053/head:mlx-bitwise-not-int-c777d55e

---

I'll analyze this and get back to you.

[metascroy]

Overall looks great @AlessandroVacca! Just a few feedbacks, and then we can merge :)

[AlessandroVacca]

Should be good now! @metascroy

[Copilot]

Pull request overview

Extends the MLX delegate’s lowering for aten.bitwise_not beyond bool tensors by introducing a dedicated BitwiseInvertNode (backed by MLX bitwise_invert) and dispatching to it for supported integer dtypes.

Changes:

• Added BitwiseInvertNode to the MLX FlatBuffers schema and appended it to the OpNode union.
• Added MLX runtime execution support (exec_bitwise_invert) and interpreter dispatch for the new opcode.
• Updated the Python lowering handler to dispatch: bool -> LogicalNotNode, supported integers -> BitwiseInvertNode, otherwise fallback.
• Added a unary op test entry for integer torch.bitwise_not (currently int32/int64).

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
backends/mlx/serialization/schema.fbs	Defines BitwiseInvertNode and appends it to the OpNode union for serialization/runtime compatibility.
backends/mlx/runtime/MLXInterpreter.h	Implements and dispatches execution for the new bitwise invert op in the MLX interpreter.
backends/mlx/ops.py	Updates aten.bitwise_not lowering to route bool to logical-not and integers to bitwise-invert.
backends/mlx/test/test_ops.py	Adds a new unary op test case for integer bitwise_not.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[AlessandroVacca]

Not advertised anymore whatsoever

[Copilot]

Copilot was unable to review this pull request because the user who requested the review is ineligible. To be eligible to request a review, you need a paid Copilot license, or your organization must enable Copilot code review.

[AlessandroVacca]

Summary

Fixes#18924
Extends aten.bitwise_not support in the MLX delegate to handle integer tensors, not just boolean tensors.
Previously the handler only dispatched to LogicalNotNode for bool and raised NotImplementedError for all other dtypes. This adds a dedicated BitwiseInvertNode backed by mlx::core::bitwise_invert, and updates the handler to dispatch based on dtype:

• bool → LogicalNotNode (unchanged)
• int32, int64 → BitwiseInvertNode

Changes:

• serialization/schema.fbs: add BitwiseInvertNode table and append to OpNode union
• runtime/MLXInterpreter.h: add exec_bitwise_invert() and dispatch case
• ops.py: update _bitwise_not_handler to dispatch to BitwiseInvertNode for integers
• test/test_ops.py: add bitwise_not_int test for int32 and int64

Test plan

All tests were ran on a machine with an Apple M1 Pro CPU, macOS 26.4.1.

• python3 -m py_compile backends/mlx/ops.py backends/mlx/test/test_ops.py
• python3 backends/mlx/serialization/generate.py
• python3 -m executorch.backends.mlx.test.run_all_tests bitwise_not_int

Test output

============================================================
TEST SUMMARY
============================================================
Passed: 6
Failed: 0
============================================================

cc @metascroy

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/19053

• 📄 Preview Python docs built from this PR

Note: Links to docs will display an error until the docs builds have been completed.

❗ 1 Active SEVs

There are 1 currently active SEVs. If your PR is affected, please view them below:

• Rolling out OSDC (ARC) runners on pull & trunk workflows in PyTorch main

❌ 14 New Failures, 15 Pending, 5 Unrelated Failures

As of commit bbe7c56 with merge base 56da964 ():

NEW FAILURES - The following jobs have failed:

• Cadence Build & Test / cpu-test / test-aot / test-aot (gh)
  backends/cadence/aot/tests/test_replace_ops_passes.py::TestReplaceOpsPasses::test_replace_transposed_conv_with_linear_4
• MLX / test-mlx-llm (unsloth/gemma-3-1b-it, gemma3-1b, false, 4w) / test-mlx-llm-gemma3-1b-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/gemma-3-1b-it, gemma3-1b, false, nvfp4) / test-mlx-llm-gemma3-1b-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/gemma-3-1b-it, gemma3-1b, true, 4w) / test-mlx-llm-gemma3-1b-custom-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/gemma-3-1b-it, gemma3-1b, true, nvfp4) / test-mlx-llm-gemma3-1b-custom-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Llama-3.2-1B-Instruct, llama-1b, false, 4w) / test-mlx-llm-llama-1b-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Llama-3.2-1B-Instruct, llama-1b, false, nvfp4) / test-mlx-llm-llama-1b-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Llama-3.2-1B-Instruct, llama-1b, true, 4w) / test-mlx-llm-llama-1b-custom-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Llama-3.2-1B-Instruct, llama-1b, true, nvfp4) / test-mlx-llm-llama-1b-custom-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Qwen3-0.6B, qwen3-0.6b, false, 4w) / test-mlx-llm-qwen3-0.6b-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Qwen3-0.6B, qwen3-0.6b, false, nvfp4) / test-mlx-llm-qwen3-0.6b-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Qwen3-0.6B, qwen3-0.6b, true, 4w) / test-mlx-llm-qwen3-0.6b-custom-4w (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-llm (unsloth/Qwen3-0.6B, qwen3-0.6b, true, nvfp4) / test-mlx-llm-qwen3-0.6b-custom-nvfp4 (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2
• MLX / test-mlx-whisper / test-mlx-whisper (gh)
  RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 2

FLAKY - The following jobs failed but were likely due to flakiness present on trunk:

• MLX / test-mlx-stories110m / test-mlx-stories110m (gh) (detected as infra flaky with no log or failing log classifier)
• pull / test-llama-runner-qnn-linux (fp32, qnn_8a8w, qnn) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
• pull / test-qnn-passes-linux / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
• pull / unittest-editable / windows / windows-job (gh) (detected as infra flaky with no log or failing log classifier)
• pull / unittest-wasm-bindings (--enable-etdump) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)

This comment was automatically generated by Dr. CI and updates every 15 minutes.

[AlessandroVacca]

@pytorchbot label "release notes: apple"

[Copilot]

Pull request overview

Extends the MLX delegate’s lowering for aten.bitwise_not to support integer tensors by introducing a new BitwiseInvertNode backed by MLX bitwise_invert, while keeping the existing boolean lowering via LogicalNotNode.

Changes:

• Add BitwiseInvertNode to the FlatBuffers schema and OpNode union.
• Add MLX runtime execution support (exec_bitwise_invert) and interpreter dispatch for the new opcode.
• Update the Python op handler to emit BitwiseInvertNode for non-bool inputs and add a basic integer test case.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
backends/mlx/serialization/schema.fbs	Adds BitwiseInvertNode table and appends it to the OpNode union for serialization.
backends/mlx/runtime/MLXInterpreter.h	Implements exec_bitwise_invert() and adds interpreter dispatch for OpCode::BITWISE_INVERT.
backends/mlx/ops.py	Updates aten.bitwise_not handler to emit BitwiseInvertNode for non-bool inputs.
backends/mlx/test/test_ops.py	Adds a unary op test for integer torch.bitwise_not.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[AlessandroVacca]

I consciously decided to test only what was asked to be added, lmk if you need also the bool test case

[metascroy]

Test whatever dtypes you assert as supported in the handler.

Also, can you paste the outcome of successful test in the PR description?

[AlessandroVacca]

is the test summary in the description of the PR any good?

[nil-is-all]

@claude review this PR

[claude]

Claude encountered an error —— View job

Command failed: git fetch origin --depth=20 pull/19053/head:mlx-bitwise-not-int-c777d55e

---

I'll analyze this and get back to you.

[metascroy]

Overall looks great @AlessandroVacca! Just a few feedbacks, and then we can merge :)

[AlessandroVacca]

Should be good now! @metascroy

[Copilot]

Pull request overview

Extends the MLX delegate’s lowering for aten.bitwise_not beyond bool tensors by introducing a dedicated BitwiseInvertNode (backed by MLX bitwise_invert) and dispatching to it for supported integer dtypes.

Changes:

• Added BitwiseInvertNode to the MLX FlatBuffers schema and appended it to the OpNode union.
• Added MLX runtime execution support (exec_bitwise_invert) and interpreter dispatch for the new opcode.
• Updated the Python lowering handler to dispatch: bool -> LogicalNotNode, supported integers -> BitwiseInvertNode, otherwise fallback.
• Added a unary op test entry for integer torch.bitwise_not (currently int32/int64).

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
backends/mlx/serialization/schema.fbs	Defines BitwiseInvertNode and appends it to the OpNode union for serialization/runtime compatibility.
backends/mlx/runtime/MLXInterpreter.h	Implements and dispatches execution for the new bitwise invert op in the MLX interpreter.
backends/mlx/ops.py	Updates aten.bitwise_not lowering to route bool to logical-not and integers to bitwise-invert.
backends/mlx/test/test_ops.py	Adds a new unary op test case for integer bitwise_not.

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[AlessandroVacca]

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