[dart2wasm] Make IR test framework more flexible, add deferred loading baseline test

Changes to IR printing implementation:

* Emit omitted `<...>` marker to make difference between function
  without body and function with omitted body clear.
* Extend omtting capability to globals, types and tables
* Extend filtering capability to globals, types, tables
* Better table names: Try to use import or export names if available.
* Option to print globals & types always multiline
* Option to scrub absolute file uris (which aren't stable across machines)

Changes to IR binary / text:

* Extend binary parsing of element section to support imported tables
* Add printing of those (which shows how imported tables are patched)

(The patching of importing tables is used in deferred modules)

Changes to IR test framework:

* Allow more filters (see above) in the test files.
* Allow tests to use helper libraries (containing `.h.` in their name)
  without them being considered tests themselves.
* Allow using deferred loading in tests and write expectation files for
  main & deferred modules as wat files.

Other things:

* Share more code between `pkg/dart2wasm/bin/wasm2dart.dart` and
  `pkg/dart2wasm/test/ir_test.dart`
* Add baseline test for deferred loading using tear off constants

Change-Id: Ica6666f23f5aa6fb2174f414c9082039940f8dc5
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/456460
Commit-Queue: Martin Kustermann <kustermann@google.com>
Reviewed-by: Nate Biggs <natebiggs@google.com>
23 files changed
tree: 4ad4a56302b47770b98eed30fede68ffe9e900b3
  1. .dart_tool/
  2. .github/
  3. benchmarks/
  4. build/
  5. docs/
  6. pkg/
  7. runtime/
  8. samples/
  9. sdk/
  10. tests/
  11. third_party/
  12. tools/
  13. utils/
  14. .clang-format
  15. .gitattributes
  16. .gitconfig
  17. .gitignore
  18. .gn
  19. .mailmap
  20. .style.yapf
  21. AUTHORS
  22. BUILD.gn
  23. CHANGELOG.md
  24. codereview.settings
  25. CONTRIBUTING.md
  26. DEPS
  27. LICENSE
  28. OWNERS
  29. PATENT_GRANT
  30. PRESUBMIT.py
  31. pubspec.yaml
  32. README.dart-sdk
  33. README.md
  34. sdk.code-workspace
  35. sdk_args.gni
  36. sdk_packages.yaml
  37. SECURITY.md
  38. WATCHLISTS
README.md

Dart

An approachable, portable, and productive language for high-quality apps on any platform

Dart is:

  • Approachable: Develop with a strongly typed programming language that is consistent, concise, and offers modern language features like null safety and patterns.

  • Portable: Compile to ARM, x64, or RISC-V machine code for mobile, desktop, and backend. Compile to JavaScript or WebAssembly for the web.

  • Productive: Make changes iteratively: use hot reload to see the result instantly in your running app. Diagnose app issues using DevTools.

Dart's flexible compiler technology lets you run Dart code in different ways, depending on your target platform and goals:

  • Dart Native: For programs targeting devices (mobile, desktop, server, and more), Dart Native includes both a Dart VM with JIT (just-in-time) compilation and an AOT (ahead-of-time) compiler for producing machine code.

  • Dart Web: For programs targeting the web, Dart Web includes both a development time compiler (dartdevc) and a production time compiler (dart2js).

Dart platforms illustration

License & patents

Dart is free and open source.

See LICENSE and PATENT_GRANT.

Using Dart

Visit dart.dev to learn more about the language, tools, and to find codelabs.

Browse pub.dev for more packages and libraries contributed by the community and the Dart team.

Our API reference documentation is published at api.dart.dev, based on the stable release. (We also publish docs from our beta and dev channels, as well as from the primary development branch).

Building Dart

If you want to build Dart yourself, here is a guide to getting the source, preparing your machine to build the SDK, and building.

There are more documents in our repo at docs.

Contributing to Dart

The easiest way to contribute to Dart is to file issues.

You can also contribute patches, as described in Contributing.

Roadmap

Future plans for Dart are included in the combined Dart and Flutter roadmap on the Flutter wiki.