[ExecuTorch][WebGPU] Add shape/copy ops (dim_order, expand_copy, fill) to the WebGPU backend by JCNTH · Pull Request #20929 · pytorch/executorch

JCNTH · 2026-07-14T21:49:03Z

Stack from ghstack (oldest at bottom):

Add _clone_dim_order (DMA copy), aten.expand_copy (broadcast), and fill (aten.full/full_like/scalar_tensor) handlers for the training tail.

Key changes:

runtime/ops/{dim_order,expand_copy,fill}/ — WGSL kernels + handlers (dim_order is a native buffer DMA copy)
CMakeLists.txt WEBGPU_SRCS — wire the sources

Reuses the shared Vulkan partitioner (_clone_dim_order/expand_copy/full* already registered); WebGPU kernels only.

Co-authored-with: Claude Code.
@exported-using-ghexport

Differential Revision: D111755131

[ghstack-poisoned]

pytorch-bot · 2026-07-14T21:49:07Z

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/20929

📄 Preview Python docs built from this PR

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❌ 4 New Failures, 1 Unrelated Failure, 6 Unclassified Failures

As of commit a206e8b with merge base 21554e5 ():

NEW FAILURES - The following jobs have failed:

pull / test-qnn-python-imports-linux / linux-job (gh)
An error occurred trying to start process '/usr/bin/bash' with working directory '/home/ec2-user/actions-runner/_work/executorch/executorch/pytorch/executorch'. No such file or directory
pull / test-qnn-testsuite-linux / test-backend-linux (qnn, models) / linux-job (gh)
An error occurred trying to start process '/usr/bin/bash' with working directory '/home/ec2-user/actions-runner/_work/executorch/executorch/pytorch/executorch'. No such file or directory
pull / test-qnn-testsuite-linux / test-backend-linux (qnn, operators) / linux-job (gh)
An error occurred trying to start process '/usr/bin/bash' with working directory '/home/ec2-user/actions-runner/_work/executorch/executorch/pytorch/executorch'. No such file or directory
pull / unittest-wasm-bindings (--enable-etdump) / linux-job (gh)
An error occurred trying to start process '/usr/bin/bash' with working directory '/home/ec2-user/actions-runner/_work/executorch/executorch/pytorch/executorch'. No such file or directory

UNCLASSIFIED FAILURES - DrCI could not classify the following jobs because the workflow did not run on the merge base. The failures may be pre-existing on trunk or introduced by this PR:

periodic / test-models-linux (buck2, mv3, portable, linux.2xlarge, 90) / linux-job (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
An error occurred trying to start process '/usr/bin/bash' with working directory '/home/ec2-user/actions-runner/_work/executorch/executorch/pytorch/executorch'. No such file or directory
periodic / test-models-linux (buck2, mv3, xnnpack-quantization-delegation, linux.2xlarge, 90) / linux-job (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
An error occurred trying to start process '/usr/bin/bash' with working directory '/home/ec2-user/actions-runner/_work/executorch/executorch/pytorch/executorch'. No such file or directory
periodic / test-models-linux (cmake, mv3, portable, linux.2xlarge, 90) / linux-job (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
An error occurred trying to start process '/usr/bin/bash' with working directory '/home/ec2-user/actions-runner/_work/executorch/executorch/pytorch/executorch'. No such file or directory
periodic / test-models-linux (cmake, mv3, xnnpack-quantization-delegation, linux.2xlarge, 90) / linux-job (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
An error occurred trying to start process '/usr/bin/bash' with working directory '/home/ec2-user/actions-runner/_work/executorch/executorch/pytorch/executorch'. No such file or directory
periodic / test-models-linux (cmake, vit, portable, linux.2xlarge, 90) / linux-job (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
An error occurred trying to start process '/usr/bin/bash' with working directory '/home/ec2-user/actions-runner/_work/executorch/executorch/pytorch/executorch'. No such file or directory
periodic / test-models-linux (cmake, vit, xnnpack-quantization-delegation, linux.2xlarge, 90) / linux-job (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
An error occurred trying to start process '/usr/bin/bash' with working directory '/home/ec2-user/actions-runner/_work/executorch/executorch/pytorch/executorch'. No such file or directory

FLAKY - The following job failed but was likely due to flakiness present on trunk:

pull / test-arm-backend-no-driver (test_pytest_models_tosa) / linux-job (gh) (matched linux rule in flaky-rules.json)
The runner has received a shutdown signal. This can happen when the runner service is stopped, or a manually started runner is canceled.

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

github-actions · 2026-07-14T21:49:49Z

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[ghstack-poisoned]

…) to the WebGPU backend Pull Request resolved: #20929 Add `_clone_dim_order` (DMA copy), `aten.expand_copy` (broadcast), and `fill` (`aten.full`/`full_like`/`scalar_tensor`) handlers for the training tail. Key changes: - `runtime/ops/{dim_order,expand_copy,fill}/` — WGSL kernels + handlers (dim_order is a native buffer DMA copy) - `CMakeLists.txt` `WEBGPU_SRCS` — wire the sources Reuses the shared Vulkan partitioner (`_clone_dim_order`/`expand_copy`/`full`* already registered); WebGPU kernels only. Co-authored-with: Claude Code. ghstack-source-id: 405026073 @exported-using-ghexport Differential Revision: [D111755131](https://our.internmc.facebook.com/intern/diff/D111755131/)

Update

78490d5

[ghstack-poisoned]

JCNTH requested review from kirklandsign and larryliu0820 as code owners July 14, 2026 21:49

JCNTH temporarily deployed to cadence July 14, 2026 21:49 — with GitHub Actions Inactive

SS-JIA approved these changes Jul 16, 2026

View reviewed changes

Update

ef8ea81

[ghstack-poisoned]

JCNTH temporarily deployed to cadence July 16, 2026 23:48 — with GitHub Actions Inactive

JCNTH temporarily deployed to cadence July 17, 2026 02:59 — with GitHub Actions Inactive

Update

a359af2

[ghstack-poisoned]

JCNTH temporarily deployed to cadence July 17, 2026 04:39 — with GitHub Actions Inactive

JCNTH mentioned this pull request Jul 17, 2026

[ExecuTorch][WebGPU] Glob runtime/ops sources in CMakeLists #21005

Merged

JCNTH temporarily deployed to cadence July 17, 2026 05:09 — with GitHub Actions Inactive

Update

a206e8b

[ghstack-poisoned]

JCNTH temporarily deployed to cadence July 21, 2026 05:02 — with GitHub Actions Inactive

JCNTH temporarily deployed to cadence July 21, 2026 05:30 — with GitHub Actions Inactive

meta-codesync Bot merged commit 1175ff5 into gh/JCNTH/68/base Jul 21, 2026
172 of 185 checks passed

meta-codesync Bot deleted the gh/JCNTH/68/head branch July 21, 2026 16:22

meta-codesync Bot temporarily deployed to cherry-pick-bot July 21, 2026 16:22 Inactive

pytorchbot mentioned this pull request Jul 21, 2026

[ExecuTorch][WebGPU] Add shape/copy ops (dim_order, expand_copy, fill) to the WebGPU backend #21082

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[ExecuTorch][WebGPU] Add shape/copy ops (dim_order, expand_copy, fill) to the WebGPU backend#20929

[ExecuTorch][WebGPU] Add shape/copy ops (dim_order, expand_copy, fill) to the WebGPU backend#20929
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🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/20929

❌ 4 New Failures, 1 Unrelated Failure, 6 Unclassified Failures

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