Arm backend: Avoid shared qspec bridges for uint8 IO

[bdemirb]

When preserved uint8 model IO is used, SharedQspecQuantizer can merge image-scale tensors with wider internal activation ranges.

Avoid using cat, concatenate, stack, pixel_shuffle, and slice as fallback shared-qspec bridge ops for graphs with uint8 IO. This keeps normal int8 quantisation behaviour unchanged while preserving image input qparams for uint8 IO flows.

Add a regression test covering image-like uint8 IO joined with a high-range branch.

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

[pytorch-bot]

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❌ 46 New Failures, 1 Unclassified Failure

As of commit e52c45e with merge base cdb9413 ():

NEW FAILURES - The following jobs have failed:

• Lint / lintrunner-mypy (gh)
  >>> Lint for backends/cortex_m/quantizer/pattern_matcher.py:
• pull / android / build-android (gh)
  ImportError: /opt/hostedtoolcache/Python/3.11.15/x64/lib/python3.11/site-packages/executorch/extension/training/pybindings/_training_lib.cpython-311-x86_64-linux-gnu.so: undefined symbol: _ZN3c104impl3cow23materialize_cow_storageERNS_11StorageImplE
• pull / test-arm-backend-no-driver (test_pytest_models_tosa) / linux-job (gh)
  RuntimeError: Command docker exec -t 8b871b28bb709293fed79983cfe77c81d5a952f9177aded6201a0786d6922968 /exec failed with exit code 1
• pull / test-arm-backend-no-driver (test_pytest_ops_no_target) / linux-job (gh)
  RuntimeError: Command docker exec -t 78a3aec3d43834977bd54159a851a9791a8897c8c78a24d6747d97432ca9545b /exec failed with exit code 1
• pull / test-arm-backend-no-driver (test_pytest_ops_tosa) / linux-job (gh)
  RuntimeError: Command docker exec -t b52a3789cfe7047d211f4312e4049d9e8eacc46733dbbdd16f8ad27ac167de1e /exec failed with exit code 1
• pull / test-arm-backend-no-driver (test_run_tosa) / linux-job (gh)
  RuntimeError: Command docker exec -t 2d164de5b88feb465a9d4e555ca4711a45b84f52ab75f2b051f9be249776733b /exec failed with exit code 1
• pull / test-arm-backend-public-api-backward-compatibility / linux-job (gh)
  RuntimeError: Command docker exec -t 5348cc868a81686703b6bf817a52cca846be3264165d6c67e1e3877c97db2f27 /exec failed with exit code 1
• pull / test-arm-cortex-m-size-test (bare_metal) / linux-job (gh)
  RuntimeError: Command docker exec -t 2fca06d514e95b8c1080a6cc4984e8fd1f3aa0983110e8cf0100fce40087ec09 /exec failed with exit code 1
• pull / test-arm-cortex-m-size-test (zephyr-preset) / linux-job (gh)
  RuntimeError: Command docker exec -t 689c71372ee938b0cfb3d573e6f3f33eb54390b536bdfe4546aa393819c2d165 /exec failed with exit code 1
• pull / test-mcu-cortex-m-backend / linux-job (gh)
  RuntimeError: Command docker exec -t cdbad50d3bd7662410a7e54bf370721885f7b8f9b8997cc03e7aac0b030831d5 /exec failed with exit code 1
• pull / unittest / linux / linux-job (gh)
  RuntimeError: Command docker exec -t 93c41ab007312f3afdda9cfe59d2dd7a9631faf72b50e3fb41724843e390f74b /exec failed with exit code 1
• pull / unittest-editable / linux / linux-job (gh)
  RuntimeError: Command docker exec -t 88f98712180c268127f0fb36cb7d6393d7b11256341cc7982e81a607515d627c /exec failed with exit code 1
• Test ARM Backend / test-arm / test-backend-linux (arm_tosa_fp, models) / linux-job (gh)
  RuntimeError: Command docker exec -t e883118bbf508b502ffa5fc8ac76fda5facf797131537f442a19718bd95a4253 /exec failed with exit code 1
• Test ARM Backend / test-arm / test-backend-linux (arm_tosa_fp, operators) / linux-job (gh)
  RuntimeError: Command docker exec -t 66af74139ada15e45f3796643ef6a1c1750184eb766b9140469af85fb3423ad6 /exec failed with exit code 1
• Test ARM Backend / test-arm / test-backend-linux (arm_vgf_fp, models) / linux-job (gh)
  RuntimeError: Command docker exec -t 98b25ade6ba3e88fbc69a7872d94293b8b868ed51a121ce596473d285967ca47 /exec failed with exit code 1
• Test ARM Backend / test-arm / test-backend-linux (arm_vgf_fp, operators) / linux-job (gh)
  RuntimeError: Command docker exec -t c1e3011c9b3c844c9221510ba3af8dc9af1905e0d546b21e555ca9c2a43ad33b /exec failed with exit code 1
• trunk / test-arm-backend-ethos-u (test_deit_e2e_ethos_u) / linux-job (gh)
  RuntimeError: Command docker exec -t 82b0e3e149fa53ed351f547eb6579257def518944fb473e034a36e81a06d5166 /exec failed with exit code 1
• trunk / test-arm-backend-ethos-u (test_memory_allocation) / linux-job (gh)
  RuntimeError: Command docker exec -t 5ae9bdf3d1fdc005135e2c836a288e531f405c3aa44bf4250ba4b20472e6181c /exec failed with exit code 1
• trunk / test-arm-backend-ethos-u (test_model_smollm2_135M_ethos_u85) / linux-job (gh)
  RuntimeError: Command docker exec -t 3ef2c00b7ea5a2531dd3aa0436f86f4d67a2ba9d056a9e027dc81886c7057c34 /exec failed with exit code 1
• trunk / test-arm-backend-ethos-u (test_ootb_tests_ethos_u) / linux-job (gh)
  RuntimeError: Command docker exec -t acc05d8e66c8632a5c9d3b23294c26b9d9351be610195f86a6a057521c14f656 /exec failed with exit code 1
• trunk / test-arm-backend-ethos-u (test_ootb_tests_tosa) / linux-job (gh)
  RuntimeError: Command docker exec -t 1b497464dfb8cd74e63bb3a04b09f4b620bd8fa8c6b5486d7aa0d5724ecad15a /exec failed with exit code 1
• trunk / test-arm-backend-ethos-u (test_pytest_models_ethos_u55) / linux-job (gh)
  RuntimeError: Command docker exec -t a65175c8001fe46b0ea7cf94f13917b70bac9eae2f499f56677c289bdf123389 /exec failed with exit code 1
• trunk / test-arm-backend-ethos-u (test_pytest_models_ethos_u85) / linux-job (gh)
  RuntimeError: Command docker exec -t fd3fe28c80507dff2d948dd0e0b62273bdeaa56e7f2e1db84a795455e027aa0c /exec failed with exit code 1
• trunk / test-arm-backend-ethos-u (test_pytest_ops_ethos_u55) / linux-job (gh)
  RuntimeError: Command docker exec -t 5bc90d3d9a0fde843c36ab8406da7b801d89338e2777ef8f7dad8cd98785cc84 /exec failed with exit code 1
• trunk / test-arm-backend-ethos-u (test_pytest_ops_ethos_u85) / linux-job (gh)
  RuntimeError: Command docker exec -t b1b169bf8e729506daca9898556036e57ff0bdd92ce73e7d41d349f93801df24 /exec failed with exit code 1
• trunk / test-arm-backend-ethos-u (test_run_ethos_u55) / linux-job (gh)
  RuntimeError: Command docker exec -t e70f2265964437821cdd00ce2674a31b403b26434d084f733b0c6480392fda93 /exec failed with exit code 1
• trunk / test-arm-backend-ethos-u (test_run_ethos_u85) / linux-job (gh)
  RuntimeError: Command docker exec -t 83c2c8d429107454e88d598ff334e5b93ff32f4a9c6ca0333f5f061798f3ddca /exec failed with exit code 1
• trunk / test-arm-backend-ethos-u (test_smaller_stories_llama_tosa) / linux-job (gh)
  RuntimeError: Command docker exec -t 3bae6499c218a6e1dae7dcc1ca88221c3c7b8b91bdad1395693b6593a5e1c029 /exec failed with exit code 1
• trunk / test-arm-backend-vkml (test_ootb_tests_vgf) / linux-job (gh)
  RuntimeError: Command docker exec -t 296f3cec40b9b09c247a1047e96fc0406dcd06734c89ce09b8f2b4f427cb83e4 /exec failed with exit code 1
• trunk / test-arm-backend-vkml (test_pytest_models_vkml) / linux-job (gh)
  RuntimeError: Command docker exec -t d43c4e0883b8d83cdbd8703d5ff3181c33931585bc70c21da6de99221819414f /exec failed with exit code 1
• trunk / test-arm-backend-vkml (test_pytest_ops_vkml) / linux-job (gh)
  RuntimeError: Command docker exec -t 36d12dfd67a196a4d1b9b48ed2f4e0b02f77098f0f9a4400b751c3ef46a55542 /exec failed with exit code 1
• trunk / test-arm-backend-vkml (test_smaller_stories_llama_vkml) / linux-job (gh)
  RuntimeError: Command docker exec -t 2c99da7e56da89dd26547eab0e2ce6fd44ddd082ddc09c3547fb58d0d69517e6 /exec failed with exit code 1
• trunk / test-arm-backend-zephyr (zephyr/samples/hello-executorch/README.md, cortex-m55) / linux-job (gh)
  RuntimeError: Command docker exec -t 9410a40f7bb260fd78f3dd08a23afe94cf199a864249db8673fa28bc9bebb0fd /exec failed with exit code 1
• trunk / test-arm-backend-zephyr (zephyr/samples/hello-executorch/README.md, ethos-u55) / linux-job (gh)
  RuntimeError: Command docker exec -t 0a3dd34b91e2d826f92e05699ba149d21c98154ef1f4eb15b0c7da19edaf7a4b /exec failed with exit code 1
• trunk / test-arm-backend-zephyr (zephyr/samples/hello-executorch/README.md, ethos-u85) / linux-job (gh)
  RuntimeError: Command docker exec -t bbd4cba9a787edc09af66c33697759a7ca10a98f2cf9628e43b0d39759c981b3 /exec failed with exit code 1
• trunk / test-arm-backend-zephyr (zephyr/samples/mv2-ethosu/README.md, ethos-u55) / linux-job (gh)
  RuntimeError: Command docker exec -t 5b3adc82ed5a764264c611912c7989f0fb4b93747c69f2c22a485c334ff31816 /exec failed with exit code 1
• trunk / test-arm-backend-zephyr (zephyr/samples/mv2-ethosu/README.md, ethos-u85) / linux-job (gh)
  RuntimeError: Command docker exec -t 4466343f1fc85ec86bd3b4375d2846668f7c7ec1cbecb4e8b0ed4bd603e848ad /exec failed with exit code 1
• trunk / test-cortex-m-e2e / run (mv2, cortex-m0plus) / mv2-cortex-m0plus (gh)
  RuntimeError: Command docker exec -t 111ece2a54ba105b00eb45500600062cb49843ce1e16a9b339e14ab417d97d9c /exec failed with exit code 1
• trunk / test-cortex-m-e2e / run (mv2, cortex-m55) / mv2-cortex-m55 (gh)
  RuntimeError: Command docker exec -t e1368e3051a57dfb5e581ea1ea047161449dfddfad432068e63253bf3ccc6550 /exec failed with exit code 1
• trunk / test-cortex-m-e2e / run (mv2, cortex-m7) / mv2-cortex-m7 (gh)
  RuntimeError: Command docker exec -t 8cec4fb238516449e7567fd1975aade3135183700d6882770c053194fa744f96 /exec failed with exit code 1
• trunk / test-cortex-m-e2e / run (mv3, cortex-m0plus) / mv3-cortex-m0plus (gh)
  RuntimeError: Command docker exec -t 9fe69f7755ac28ee2111a1c818fc77a64de8052338d9269a926024c9151c9446 /exec failed with exit code 1
• trunk / test-cortex-m-e2e / run (mv3, cortex-m55) / mv3-cortex-m55 (gh)
  RuntimeError: Command docker exec -t 3bebcf7d6e2d79f52d4ee46b727adcd3435a1bd07fdb8a9b183032060c007f04 /exec failed with exit code 1
• trunk / test-cortex-m-e2e / run (mv3, cortex-m7) / mv3-cortex-m7 (gh)
  RuntimeError: Command docker exec -t 057b244cfbe0295205723b2ede08cc6b57f3531831850c2940e7d2ba01b86d5c /exec failed with exit code 1
• trunk / test-cortex-m-ops / run (cortex-m0plus) / cortex-m-ops-cortex-m0plus (gh)
  RuntimeError: Command docker exec -t ecb25c678c83f54c3727aa944b8987033e938fa8365482911c592d9185949883 /exec failed with exit code 1
• trunk / test-cortex-m-ops / run (cortex-m7) / cortex-m-ops-cortex-m7 (gh)
  RuntimeError: Command docker exec -t 311e06ff3ff7bd51eaca847245de3675ca163774f335c40043037e76c6534273 /exec failed with exit code 1
• trunk / unittest-release / linux / linux-job (gh)
  RuntimeError: Command docker exec -t 49ff29d8311f814a24841bdc5d89094111155b1f41c2f6ffbad807a2fdb417de /exec failed with exit code 1

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

• Test QNN Windows MSVC build / build-qnn-windows-msvc / windows-job (gh) (this job did not run on the merge base, so DrCI cannot tell whether the failure is pre-existing)
  Process completed with exit code 1.

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

[bdemirb]

@pytorchbot label "partner: arm"

[bdemirb]

@pytorchbot label "release notes: arm"