Google Git
Sign in
dart / sdk / 0f371f2dba0dac9179c042cc46ce7ec6b1b90ab2
commit0f371f2dba0dac9179c042cc46ce7ec6b1b90ab2[log] [tgz]
authorVyacheslav Egorov <vegorov@google.com>Tue Jan 26 11:03:29 2021 +0000
committercommit-bot@chromium.org <commit-bot@chromium.org>Tue Jan 26 11:03:29 2021 +0000
tree49e1c9e218d6e0065570e51b4954f4d88f920c69
parent67e71d02c89333be1d9daad53109da051bb84ef8 [diff]
[vm] Fix problems with TTS specialization

* Correctly handle _Smi type when producing TTS for it.
 Previously it would not correctly establish that an instance
 of _Smi is assignable to _Smi causing it to always fall through
 into runtime system;
* Correctly handle Null type as a type argument when checking C<Null>
 is C<X>, if Null is assignable to X we need to explicitly check if
 type argument is Null because cid ranges don't really handle this
 check.
* Strengthen the assert checking that TTS specialization succeeded:
 check that specialization is (bitwise) different from the previous
 version of the stub. If they are equal that means specialization
 failed.

TEST=vm/cc/TTS_SubtypeRangeCheck,vm/cc/TTS_Smi

Change-Id: I151a89b52ae07d7e5acce14f59bcb3226bfa1f36
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/180842
Commit-Queue: Vyacheslav Egorov <vegorov@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
3 files changed
tree: 49e1c9e218d6e0065570e51b4954f4d88f920c69
  1. .dart_tool/
  2. .github/
  3. benchmarks/
  4. build/
  5. client/
  6. docs/
  7. pkg/
  8. runtime/
  9. samples/
  10. samples-dev/
  11. samples_2/
  12. sdk/
  13. tests/
  14. third_party/
  15. tools/
  16. utils/
  17. .clang-format
  18. .gitattributes
  19. .gitconfig
  20. .gitignore
  21. .gn
  22. .mailmap
  23. .packages
  24. .style.yapf
  25. .vpython
  26. AUTHORS
  27. BUILD.gn
  28. CHANGELOG.md
  29. codereview.settings
  30. CONTRIBUTING.md
  31. DEPS
  32. LICENSE
  33. PATENT_GRANT
  34. PRESUBMIT.py
  35. README.dart-sdk
  36. README.md
  37. sdk_args.gni
  38. WATCHLISTS
README.md

Dart

A client-optimized language for fast apps on any platform

Dart is:

  • Optimized for UI: Develop with a programming language specialized around the needs of user interface creation.

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

  • Fast on all platforms: Compile to ARM & x64 machine code for mobile, desktop, and backend. Or compile to JavaScript for the web.

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 on our wiki.

Contributing to Dart

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

You can also contribute patches, as described in Contributing.