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Arm backend: Delegate constant tensor index - #22674

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Arm backend: Delegate constant tensor index#22674
perheld wants to merge 1 commit into
pytorch:mainfrom
perheld:change-1321554

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@perheld

@perheld perheld commented Sep 10, 2026

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Lower U55 index.Tensor operations with one constant rank-1 integer index to slices and optional concatenation, including indices on non-leading dimensions.

Keep runtime, empty, mask, rank>1, multiple-index, and symbolic-shape cases on the CPU. Reject out-of-range constants during preprocessing.

Authored with Codex.

Change-Id: Ib16e1c800b3517d054c77cfde39639de6f8b9369

cc @digantdesai @freddan80 @per @zingo @oscarandersson8218 @mansnils @Sebastian-Larsson @robell @rascani

Lower U55 index.Tensor operations with one constant rank-1 integer index
to slices and optional concatenation, including indices on non-leading
dimensions.

Keep runtime, empty, mask, rank>1, multiple-index, and symbolic-shape
cases on the CPU. Reject out-of-range constants during preprocessing.

Authored with Codex.

Signed-off-by: Per Held <per.held@arm.com>
Change-Id: Ib16e1c800b3517d054c77cfde39639de6f8b9369
@perheld
perheld requested a review from zingo September 10, 2026 07:27
@perheld perheld added partner: arm For backend delegation, kernels, demo, etc. from the 3rd-party partner, Arm ciflow/trunk release notes: arm Changes to the ARM backend delegate labels Sep 10, 2026
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pytorch-bot Bot commented Sep 10, 2026

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🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/22674

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

❌ 2 New Failures

As of commit fb8cd16 with merge base d0da5f8 (image):

NEW FAILURES - The following jobs have failed:

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@github-actions github-actions Bot added the module: arm Issues related to arm backend label Sep 10, 2026
@meta-cla meta-cla Bot added the CLA Signed This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed. label Sep 10, 2026
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ciflow/trunk CLA Signed This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed. module: arm Issues related to arm backend partner: arm For backend delegation, kernels, demo, etc. from the 3rd-party partner, Arm release notes: arm Changes to the ARM backend delegate

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