dart-sdk/pkg/kernel
Clement Skau ffde1585da [VM] Removes types from reused temps in async.
When we detect that a temporary variable is being reused
with a different type, we change the type of the temp
to dynamic.
This allows us to retain types for any non-reused temps.

For any dynamic temps we still have type information available
for use sites, which we can pass on via unsafeCast.

One drawback of this approach is that we don't know ahead
of time which temps are reused, and get turned into dynamic,
so we have to unsafeCast all uses.


This change is similar to what was done in:
https://dart-review.googlesource.com/c/sdk/+/138500

TEST=Adds tests/language/vm/regress_flutter_85311_test.dart,
updates relevant expect files.

Bug: https://github.com/flutter/flutter/issues/85311
Change-Id: I821c5266327892d5c3fd5bae1bebba7f3fe3931b
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/205647
Commit-Queue: Clement Skau <cskau@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
2021-07-12 08:55:53 +00:00
..
bin [kernel] Reland: Migrate remaining bin/lib libraries in package:kernel 2021-04-28 14:36:53 +00:00
doc [cfe] Implement lowering for constructor initialization of late fields 2019-11-21 09:36:35 +00:00
lib [VM] Removes types from reused temps in async. 2021-07-12 08:55:53 +00:00
test [cfe] Implement TypedefTearOffConstant.== using assumptions 2021-06-30 15:57:00 +00:00
tool [kernel,front_end] Migrate first wave of pkg/kernel and pkg/front_end 2021-01-18 15:40:21 +00:00
.gitignore
analysis_options.yaml [kernel] Enforce lints in pkg/kernel 2020-11-11 12:51:28 +00:00
AUTHORS
binary.md [cfe] Add more Kernel nodes to support constructor tear-off feature 2021-06-30 11:27:42 +00:00
codereview.settings
LICENSE Update LICENSE 2021-04-07 10:28:38 +00:00
PRESUBMIT.py [CFE] Spell check on kernel src; presubmit on kernel & _fe_analyzer_shared 2019-12-02 13:00:47 +00:00
problems.md [CFE] Special case StrongModeNNBDPackageOptOut message in IncrementalCompiler 2020-11-05 09:43:23 +00:00
pubspec.yaml [kernel] Migrate more libraries in package:kernel 2021-03-18 11:06:18 +00:00
README.md

Dart Kernel

Dart Kernel is a small high-level language derived from Dart. It is designed for use as an intermediate format for whole-program analysis and transformations, and to be consumed by codegen and execution backends.

The kernel language has an in-memory representation in Dart and can be serialized as binary or text.

Both the kernel language and its implementations are unstable and are under development.

This package contains the Dart part of the implementation and contains:

  • A transformable IR for the kernel language
  • Serialization of kernel code

Note: The APIs in this package are in an early state; developers should be careful about depending on this package. In particular, there is no semver contract for release versions of this package. Please depend directly on individual versions.

See ast.dart for the in-memory IR, or binary.md for a description of the binary format. For now, the textual format is very ad-hoc and cannot be parsed back in.