[ExecuTorch][WebGPU] cat op test suite (cases.py op-test framework)#20566
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JulianCloudNTH merged 5 commits intoJun 27, 2026
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Pull Request resolved: #20399 Registers `aten.cat.default` in the `cases.py` op-test framework: a `_cat_suite` of 4 configs (3 inputs along dim 0, 2 inputs along dim 1, 3 inputs along dim 2, uneven split along dim 1) that `generate_op_tests` exports via `VulkanPartitioner` and compares to a torch golden on Dawn. Also adds `test/ops/cat/test_cat.py` (`CatModule` + `CONFIGS` + `_op_delegated` smoke test, with distinct per-input value ranges to catch cross-slab contamination) and the `aten.cat.default` partitioner-allowlist entry in `tester.py`. ghstack-source-id: 397534688 @exported-using-ghexport @diff-train-skip-merge Differential Revision: [D108793163](https://our.internmc.facebook.com/intern/diff/D108793163/)
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…>.py Pull Request resolved: #20435 Pure test-file relocation: moves the already-landed ops' tests from nested `test/ops/<op>/test_<op>.py` to flat `test/ops/test_<op>.py`, matching the ExecuTorch convention (XNNPACK uses flat `test/ops/test_<op>.py`; Vulkan uses flat `test/test_*.py`) and completing the flatten applied to the new ops in the stack below. Drops the per-op `__init__.py`; the parent `test/ops/__init__.py` is kept. Ops: `add`, `rms_norm`, `sdpa` (`test_sdpa` + `test_update_cache`), `dispatch_order`, `quantized_linear`, `embedding_q4gsw`, `rope`, `prepack`. No behavior change — the test modules and their export/golden functions are unchanged; only their path moves. Every reference to the old paths is updated: the `cases.py` op-test imports (`add`, `rms_norm`), `test/TARGETS` (`test_add` srcs), `test/ops/test_dispatch_order.py`'s internal `rms_norm` import, and the build/CI scripts that import the per-op export functions (`test/test_build_webgpu.sh`, `scripts/test_webgpu_native_ci.sh`). Nothing required the per-op subdirectory: the codegen framework imports only `cases.py`, the one buck target uses a literal path, and the native-golden scripts import the modules by path — each resolves identically at the flat path. ghstack-source-id: 397534695 @exported-using-ghexport @diff-train-skip-merge Differential Revision: [D109349894](https://our.internmc.facebook.com/intern/diff/D109349894/)
Pull Request resolved: #20463 `aten.clone.default` is a pure flat copy on the buffer-only WebGPU backend, identical to `view_copy`: `clone_impl` reuses the existing `add_flat_copy` helper (`output[i] = input[i]`) and registers a handler under `aten.clone.default`. No new shader, generated WGSL header, or CMake source — it shares the `view_copy` flat-copy compute pipeline. Required for end-to-end Llama 3.2 1B (4-bit, KV cache): the exported model serializes 2 `aten.clone.default` ops into its runtime operator chain (the RoPE-frequency clones reused across all 16 transformer layers), so without a handler the partition graph-breaks at those nodes. Mirrors the Vulkan delegate, which registers the same op and routes a buffer clone to a flat view-copy. ghstack-source-id: 397534700 @exported-using-ghexport @diff-train-skip-merge Differential Revision: [D109477717](https://our.internmc.facebook.com/intern/diff/D109477717/)
Pull Request resolved: #20464 Adds the WebGPU delegate handler for aten.index.Tensor, the 1D-self advanced-index gather out[i] = self[index[i]] (output shape == index shape). This is the form the VulkanPartitioner delegates -- it requires a 1D self and exactly one non-None index (op_registry.py); 2D mask/freqs gathers stay on CPU. It mirrors the Vulkan delegate's index_tensor op (IndexTensor.cpp + index_tensor_buffer.glsl) as a single compute dispatch over the output elements, each reading the int32 index and gathering the corresponding fp32 self element. The op is composed as: - index.wgsl: one workgroup-strided pass, out[i] = self[u32(index[i])], guarded by a numel bound; buffer-only, fp32 self/out, int32 index, 1D dispatch via the shared WebGPUUtils helpers (clamp workgroup size + 1D count). - Index.cpp: validates the args (self/out tensors; indices ValueList with exactly one index tensor; fp32 self/out; int32 index; out numel == index numel), failing loud on any violation, then records the dispatch. row_width is dropped (always 1 for 1D self). ghstack-source-id: 397756251 @exported-using-ghexport @diff-train-skip-merge Differential Revision: [D109478967](https://our.internmc.facebook.com/intern/diff/D109478967/)
…lden) Pull Request resolved: #20465 Adds the test suite for the aten.index.Tensor op (stacked on the op diff): - test/ops/index/test_index.py: exports a module computing x[idx] through VulkanPartitioner for four configs (reorder/repeat indices over distinct self values, so a wrong-gather is visible), asserts a VulkanBackend delegate with index.Tensor absorbed (not a CPU fallback), and writes per-config .pte + .self/.idx/.golden.bin. - test/native/test_index.cpp: a standalone Dawn binary that loads each .pte, feeds self (fp32) + index (int64 at the program boundary, narrowed to the int32 buffer) and compares the gather against the torch golden at 1e-3, with a single-output shape guard. - Wired into CMake (webgpu_index_test), test/TARGETS (python_unittest test_index), and the Dawn native CI script. ghstack-source-id: 397763261 @exported-using-ghexport @diff-train-skip-merge Differential Revision: [D109479000](https://our.internmc.facebook.com/intern/diff/D109479000/)
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This PR was created by the merge bot to help merge the original PR into the main branch.
ghstack PR number: #20399 by @JulianCloudNTH
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ghstack PR base: https://github.com/pytorch/executorch/tree/gh/JulianCloudNTH/48/base
ghstack PR head: https://github.com/pytorch/executorch/tree/gh/JulianCloudNTH/48/head
Merge bot PR base: https://github.com/pytorch/executorch/tree/gh/JulianCloudNTH/47/orig
Merge bot PR head: https://github.com/pytorch/executorch/tree/gh/JulianCloudNTH/48/orig
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