[vm] Only check for Smi once when reloading cid for TTS cid checks. When generating a type testing stub (TTS) for implemented classes, multiple cid range check blocks may be generated, each of which requires reloading the cid. This CL makes it so that only a single Smi check will be generated the first time the cid is loaded, so later checks can just load the cid directly without the Smi case. TEST=vm/cc/TTS Change-Id: I4d76ee34a03cf4a0def268e9f74a096e3c0deb58 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/238702 Reviewed-by: Slava Egorov <vegorov@google.com> Commit-Queue: Tess Strickland <sstrickl@google.com>
Dart is:
Optimized for UI: Develop with a programming language specialized around the needs of user interface creation.
Productive: Make changes iteratively: use hot reload to see the result instantly in your running app.
Fast on all platforms: Compile to ARM & x64 machine code for mobile, desktop, and backend. Or compile to JavaScript for the web.
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 is free and open source.
See LICENSE and PATENT_GRANT.
Visit dart.dev to learn more about the language, tools, and to find codelabs.
Browse pub.dev for more packages and libraries contributed by the community and the Dart team.
Our API reference documentation is published at api.dart.dev, based on the stable release. (We also publish docs from our beta and dev channels, as well as from the primary development branch).
If you want to build Dart yourself, here is a guide to getting the source, preparing your machine to build the SDK, and building.
There are more documents on our wiki.
The easiest way to contribute to Dart is to file issues.
You can also contribute patches, as described in Contributing.