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Add opt-in Espressif operator-library export pipeline - #24309
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Introduce EspPassManager and a frontend EspTester using EspNNQuantizer. The new keyword-only export option preserves portable compute and executable Q/DQ with Edge IR checks enabled, reports remaining compute, and enforces strict fallback handling. Existing callers continue to use the delegate path. Validated with the complete 67-test Espressif host suite, including 11 new frontend tests covering both export routes, shared float consumers, strict fallback, multiple methods, constants, and serialization. Scoped lintrunner and whitespace checks passed. Authored with AI assistance using Codex.
🔗 Helpful Links🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/24309
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Summary
The Espressif exporter currently lowers supported regions through the ESP-NN delegate. Add an opt-in
use_operator_library=Trueroute toto_espnn_edge()that usesEspPassManagerand the existingEspNNQuantizer. This first step retains executable portable operators and Q/DQ, with normal Edge validation, direct-operator reporting, and strict fallback handling. The delegate remains the default for existing callers.Add the frontend
EspTesterand tests for both export entry points, multiple methods, constants, shared float consumers, fallback, and serialization. Multiply lowering (#24310) and runtime execution (#24311) follow in this stack.Authored with AI assistance using Codex.
Test plan
The isolated frontend change passed all 67 Espressif tests, including 11 new frontend tests. After rebasing the complete stack onto main, all 146 Python tests and all 11 optimized ESP32-S3 implementation cases passed. Scoped lint and whitespace checks also passed.