Asger Feldthaus
8bfc4b47c0
This adds a class CanonicalName that can represent a library, class, or member. All references now go through a Reference object, which is linked to both the AST node and its CanonicalName, so either can be created first. dartk now accepts multiple input files: - If multiple dart files are given, they are all compiled. - If multiple binaries are given, they are linked together. Mixed dart and binary input is not supported by dartk. dartk now has a flag --include-sdk which includes the entire SDK in the output. This is so the SDK can be compiled alone and then linked. Example of compiling separately and then linking: dartk foo.dart -o foo.dill dartk main.dart -o main.dill dartk --include-sdk -o sdk.dill dartk main.dill foo.dill sdk.dill --target=vm --link -o program.dill dartk still has incredibly slow cold start due to the analyzer loading the dart sdk, so this does not actually speed things up at the moment. BUG= R=ahe@google.com, kmillikin@google.com, kustermann@google.com, sigmund@google.com Review-Url: https://codereview.chromium.org/2665723002 .
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 as a frontend for codegen and execution backends.
The kernel language has in-memory representations in Dart and C++, 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
- A frontend based on the analyzer
- Serialization of kernel code
Getting Kernel
Checkout the repository and run pub get:
git clone https://github.com/dart-lang/kernel
cd kernel
pub get
Command-Line Tool
Run bin/dartk.dart from the command-line to convert between .dart files
and the serialized binary and textual formats.
dartk expects the .dill extension for files in the binary format.
The textual format has no preferred extension right now.
Example commands:
dartk foo.dart # print text IR for foo.dart
dartk foo.dart -ofoo.dill # write binary IR for foo.dart to foo.dill
dartk foo.dill # print text IR for binary file foo.dill
Pass the --link or -l flag to link all transitive dependencies into one file:
dartk myapp.dart -ppackages -l -omyapp.dill # Bundle everything.
dartk myapp.dill # Print it back out in a (very, very long) textual format.
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.
Testing
If you plan to make changes to kernel, get a checkout of the Dartk SDK and run:
tool/regenerate_dill_files.dart --sdk <path to SDK checkout>
pub run test
Linking
Linking from binary files is not yet implemented. In order to compile a whole program, currently everything must be compiled from source at once.