[ExecuTorch][WebGPU] Add select_copy op (aten.select_copy.int) by JulianCloudNTH · Pull Request #20362 · pytorch/executorch

JulianCloudNTH · 2026-06-17T23:59:47Z

Stack from ghstack (oldest at bottom):

Adds aten.select_copy.int to the WebGPU delegate as a gather: picks a fixed index along one dim, producing an output of rank (input rank - 1).

Composition (single dispatch):

select/Select.cpp — reads [self, dim, index, out] (static Int via read_scalar; throws on dynamic SymInt), normalizes + bounds-checks dim/index, builds 2 TensorMeta UBOs + a SelectParams{dim,index}, fp32 guard, 1D-dispatch over numel, releases uniforms after the bind group.
select/select.wgsl — seeds the input offset with index * in.strides[dim], delinearizes the output index, maps each out dim to its in dim (shifted past the selected dim), relinearizes on input strides.
@exported-using-ghexport

Differential Revision: D108793166

[ghstack-poisoned]

pytorch-bot · 2026-06-17T23:59:50Z

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/20362

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❌ 1 New Failure, 1 Pending, 2 Unrelated Failures

As of commit 94dd90d with merge base e03f777 ():

NEW FAILURE - The following job has failed:

pull / unittest-buck / linux / linux-job (gh)
RuntimeError: Command docker exec -t 57b0a5bb156d5dd21931c56b6b85ba6bc104016f02e0afe8dbf35c7bc585108c /exec failed with exit code 3

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

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

pull / test-llama-runner-qnn-linux (fp32, qnn_16a16w, qnn) / linux-job (gh) (trunk failure)
pull / unittest-buck / macos / macos-job (gh) (trunk failure)
RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 3

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github-actions · 2026-06-18T00:00:28Z

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[ghstack-poisoned]

…ework) (#20363) Stack from [ghstack](https://github.com/ezyang/ghstack/tree/0.15.0) (oldest at bottom): * #20465 * #20464 * #20463 * #20435 * #20399 * #20398 * #20397 * #20396 * #20395 * #20394 * #20393 * #20392 * #20391 * #20390 * __->__ #20363 * #20362 * #20361 * #20360 * #20359 Registers `aten.select_copy.int` in the `cases.py` op-test framework: a `_select_suite` of 4 configs (leading/middle/last dim + negative index) that `generate_op_tests` exports and compares to a torch golden on Dawn. Also adds `test/ops/select/test_select.py` (`SelectModule` + `CONFIGS` + an export-delegation/eager smoke test) and the `aten.select_copy.int` partitioner-allowlist entry in `tester.py`. @exported-using-ghexport Differential Revision: [D108793161](https://our.internmc.facebook.com/intern/diff/D108793161/) Differential Revision: [D108793161](https://our.internmc.facebook.com/intern/diff/D108793161)

Stack from [ghstack](https://github.com/ezyang/ghstack/tree/0.15.0) (oldest at bottom): * #20465 * #20464 * #20463 * #20435 * #20399 * #20398 * #20397 * #20396 * #20395 * #20394 * #20393 * #20392 * #20391 * __->__ #20390 * #20363 * #20362 * #20361 * #20360 * #20359 Adds `aten.sigmoid.default` to the WebGPU delegate: element-wise `1/(1+exp(-x))` over a flat fp32 buffer. On the Llama critical path (`F.silu` -> `sigmoid` + `mul`). Composition (single dispatch): - `sigmoid/UnaryOp.cpp` — binds input (storage, read-only) + output (storage) + a `Params{num_elements}` uniform, 1D-dispatches over `num_elements` with `override wg_size` (clamped to the device limit); mirrors the `add` op (uniform mapped-at-creation, released after the bind group). - `sigmoid/sigmoid.wgsl` — guards `idx >= num_elements` and writes the logistic of each element. @exported-using-ghexport Differential Revision: [D108793157](https://our.internmc.facebook.com/intern/diff/D108793157/) Differential Revision: [D108793157](https://our.internmc.facebook.com/intern/diff/D108793157)

…k) (#20391) Stack from [ghstack](https://github.com/ezyang/ghstack/tree/0.15.0) (oldest at bottom): * #20465 * #20464 * #20463 * #20435 * #20399 * #20398 * #20397 * #20396 * #20395 * #20394 * #20393 * #20392 * __->__ #20391 * #20390 * #20363 * #20362 * #20361 * #20360 * #20359 Registers `aten.sigmoid.default` in the `cases.py` op-test framework: a `_sigmoid_suite` (hard-coded shapes + a saturation case over a `linspace(-12, 12)` input) that `generate_op_tests` exports and compares to an fp64 torch golden on Dawn. Also adds `test/ops/sigmoid/test_sigmoid.py` (`SigmoidModule` + `N` + `_det_input` + an export-delegation/eager smoke test) and the `aten.sigmoid.default` partitioner-allowlist entry in `tester.py`. @exported-using-ghexport Differential Revision: [D108793159](https://our.internmc.facebook.com/intern/diff/D108793159/) Differential Revision: [D108793159](https://our.internmc.facebook.com/intern/diff/D108793159)

…20392) Stack from [ghstack](https://github.com/ezyang/ghstack/tree/0.15.0) (oldest at bottom): * #20465 * #20464 * #20463 * #20435 * #20399 * #20398 * #20397 * #20396 * #20395 * #20394 * #20393 * __->__ #20392 * #20391 * #20390 * #20363 * #20362 * #20361 * #20360 * #20359 Adds `aten.squeeze_copy.dims` and `aten.unsqueeze_copy.default` to the WebGPU delegate. Both are numel-preserving shape ops; on a dense row-major buffer backend they are the same flat copy as `view_copy` — only the shape metadata differs (mirrors the Vulkan delegate, which routes both through `add_view_copy_node`). Composition (no new kernel): - `squeeze/Squeeze.cpp` — reads `args = [self, dims, out]`, ignores the AOT-fixed `dims`, calls `add_flat_copy(graph, in, out)` from `runtime/ops/view_copy/view_copy.h`. - `unsqueeze/Unsqueeze.cpp` — reads `args = [self, dim, out]`, ignores the AOT-fixed `dim`, calls `add_flat_copy(graph, in, out)`. @exported-using-ghexport Differential Revision: [D108793153](https://our.internmc.facebook.com/intern/diff/D108793153/) Differential Revision: [D108793153](https://our.internmc.facebook.com/intern/diff/D108793153)

….py op-test framework) (#20393) Stack from [ghstack](https://github.com/ezyang/ghstack/tree/0.15.0) (oldest at bottom): * #20465 * #20464 * #20463 * #20435 * #20399 * #20398 * #20397 * #20396 * #20395 * #20394 * __->__ #20393 * #20392 * #20391 * #20390 * #20363 * #20362 * #20361 * #20360 * #20359 Registers `aten.squeeze_copy.dims` and `aten.unsqueeze_copy.default` in the `cases.py` op-test framework: a `_squeeze_suite` of 3 configs (squeeze leading/middle/multiple size-1 dims) and a `_unsqueeze_suite` of 3 configs (insert dim at front/middle/last) that `generate_op_tests` exports via `VulkanPartitioner` and compares to a torch golden on Dawn. Also adds `test/ops/squeeze/test_squeeze.py` (`SqueezeModule` + `CONFIGS` + `_op_delegated` smoke test), `test/ops/unsqueeze/test_unsqueeze.py` (`UnsqueezeModule` + `CONFIGS` + `_op_delegated` smoke test), and the two partitioner-allowlist entries in `tester.py`. @exported-using-ghexport Differential Revision: [D108793152](https://our.internmc.facebook.com/intern/diff/D108793152/) Differential Revision: [D108793152](https://our.internmc.facebook.com/intern/diff/D108793152)

Pull Request resolved: #20362 Adds `aten.select_copy.int` to the WebGPU delegate as a gather: picks a fixed index along one dim, producing an output of rank (input rank - 1). Composition (single dispatch): - `select/Select.cpp` — reads `[self, dim, index, out]` (static `Int` via `read_scalar`; throws on dynamic `SymInt`), normalizes + bounds-checks dim/index, builds 2 `TensorMeta` UBOs + a `SelectParams{dim,index}`, fp32 guard, 1D-dispatch over `numel`, releases uniforms after the bind group. - `select/select.wgsl` — seeds the input offset with `index * in.strides[dim]`, delinearizes the output index, maps each out dim to its in dim (shifted past the selected dim), relinearizes on input strides. ghstack-source-id: 397026510 @exported-using-ghexport Differential Revision: [D108793166](https://our.internmc.facebook.com/intern/diff/D108793166/)

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[ExecuTorch][WebGPU] Flatten landed-op test dirs to test/ops/test_<op>.py #20435

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[ExecuTorch][WebGPU] Add clone op (aten.clone.default) #20463

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[ExecuTorch][WebGPU] Add aten.index.Tensor (1D-self gather) #20464

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[ExecuTorch][WebGPU] aten.index.Tensor test suite (export + native golden) #20465

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JulianCloudNTH merged commit 01ffde5 into gh/JulianCloudNTH/37/base Jun 26, 2026
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[ExecuTorch][WebGPU] Add select_copy op (aten.select_copy.int) #20538

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[ExecuTorch][WebGPU] Add select_copy op (aten.select_copy.int)#20362

[ExecuTorch][WebGPU] Add select_copy op (aten.select_copy.int)#20362
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❌ 1 New Failure, 1 Pending, 2 Unrelated Failures

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