Aske Simon Christensen
7799f424f4
This refactoring achieves the following: - Collect the integer operation semantics into one place instead of having it sprinkled all over the constant evaluator with many "if (targetingJavaScript)" tests. - Avoid emitting the internal JavaScriptIntConstant node, which is serialized as normal DoubleConstant nodes, thus achieving parity between direct consumers and consumers seeing output that has been serialized. - Implement the JavaScript semantics for unsigned right shift. - Fix truncating divide with a result outside int64 range incorrectly clamping the result for JS targets. - Fix positive hex constants >= 2^63 through int.fromEnvironment producing negative values in dart2js. - Clarify in Kernel documentation how numeric constants are represented on VM vs JS targets. Change-Id: If30bb2c2c77c54eff120b611b059c2ec726c99a0 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/116525 Reviewed-by: Mayank Patke <fishythefish@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.