[flow analysis] Remove skipDuplicateCheck hack.

In https://dart-review.googlesource.com/c/sdk/+/278649, I added
assertions to flow analysis to make sure that `FlowAnalysis.declare`
wasn't called more times than necessary. To work around a few instance
in which it _was_ being called more than necessary, I added a
parameter `skipDuplicateCheck` that caused the assertion to be
skipped.

This change fixes the one remaining case in which skipping the check
was necessary, by moving the CFE logic that calls
`FlowAnalysis.declare` for formal parameters. Previously, this logic
was in both `BodyBuilder.finishFunction` and
`BodyBuilder.finishConstructor`, resulting in some duplication because
`BodyBuilder.finishFunction` sometimes calls
`BodyBuilder.finishConstructor`. I've moved the logic into a new
method, `BodyBuilder._declareFormals`, which is called from
`BodyBuilder.finishFunction` and `BodyBuilder.parseInitializers`,
ensuring that the calls to `FlowAnalysis.declare` only occur once.

Fixing this case allows the `skipDuplicateCheck` hack to be removed
entirely.

Note that there was also one place where the analyzer was also using
`skipDuplicateCheck`, but it was doing so unnecessarily.

Change-Id: Ic34d1b7120f05d94c53774d52eb90e4ada67415f
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/434261
Commit-Queue: Paul Berry <paulberry@google.com>
Reviewed-by: Chloe Stefantsova <cstefantsova@google.com>
Reviewed-by: Johnni Winther <johnniwinther@google.com>
2 files changed
tree: 139e6fda3f83cd3f1d4e457aa57595fcef84b43b
  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

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See LICENSE and PATENT_GRANT.

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

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