Stephen Adams
8c13fa841e
Simple calls to `List.generate` are expanded into a list allocation and a loop. This generates better code for several reasons: - There is no overhead for the function argument (closure allocation, closure type, closure class) - Global type inference is more precise since each List.generate list is tracked separately, and the assignments in the loop give better inference to the collection's element type. To get precise element type inference, there are two new JSArray constructors. Global type inference starts with the element type being bottom for these elements, avoiding spurious nulls in the inferred type. Change-Id: I5efb90651ae3f9eb2e81af556704960cdf0b75c5 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/168770 Commit-Queue: Stephen Adams <sra@google.com> Reviewed-by: Johnni Winther <johnniwinther@google.com>
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.