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Erik Corry cf78da8a48 [VM] Reduce Smi size to 32 bit on 64 bit platforms 
This reduces small tagged integers on 64 bit platforms from 63 bits to
31 bits plus one tag bit.
This is a step on the way to compile-time-optional compressed pointers
on 64 bit platforms.  See more about this at go/dartvmlearnings
This causes a slowdown for some uses of integers that don't fit in 31
signed bits, but because both x64 and ARM64 have unboxed 64 bit
integers now the performance hit should not be too bad.

This is a reapplication of
https://dart-review.googlesource.com/c/sdk/+/46244
It was reverted due to a compilation error on 32 bit
ARM with DBC.

R=vegorov@google.com

Change-Id: I943de1768519457f0e5a61ef0b4ef204b6a53281
Reviewed-on: https://dart-review.googlesource.com/51321
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
2018-04-25 12:31:33 +00:00
.github Add an issue template to the SDK 2018-04-05 13:05:09 +00:00
build [infra] Use a relative path for the Linux sysroot 2018-04-18 21:14:23 +00:00
client Remove old annotated_steps buildbot scripts and dispatcher 2017-05-23 16:17:02 +02:00
docs Fixed a couple of typos in subtyping.md 2018-04-13 05:59:02 +00:00
pkg Add missing annotations in Library.visitChildren/transformChildren 2018-04-25 10:20:18 +00:00
runtime [VM] Reduce Smi size to 32 bit on 64 bit platforms 2018-04-25 12:31:33 +00:00
samples [infra] Keep comments intact when updating status files. 2018-04-10 19:03:21 +00:00
samples-dev Remove uses of upper-case constants in remaining SDK code. 2018-04-16 16:11:57 +00:00
sdk Revert "Create _nullFuture and _falseFuture in the root zone." 2018-04-24 20:45:38 +00:00
tests [VM] Reduce Smi size to 32 bit on 64 bit platforms 2018-04-25 12:31:33 +00:00
third_party [infra] Keep comments intact when updating status files. 2018-04-10 19:03:21 +00:00
tools Build Observatory directly with dart2js 2018-04-24 21:56:09 +00:00
utils [build] Remove unnecessary inputs from uses of application_snapshot. 2018-04-16 21:13:09 +00:00
.clang-format VM: Re-format to use at most one newline between functions 2017-07-13 08:08:37 -07:00
.gitattributes Avoid crash on EOF error in file with Windows line encoding 2018-04-09 12:16:20 +00:00
.gitignore Git ignore vscode project files. 2017-03-23 15:26:06 -07:00
.gn Starting work on full GN build 2016-09-23 07:47:36 -07:00
.mailmap Add .mailmap file. 2015-05-18 19:33:16 +02:00
.packages Readd web-components: it is used for unit tests of dart:html 2018-04-03 20:13:19 +00:00
AUTHORS Add Cristian Almstrand to AUTHORS 2015-07-16 09:51:56 -07:00
BUILD.gn [gn] Propagate outputs up to //create_sdk. 2018-04-24 16:03:45 +00:00
CHANGELOG.md [release] Merge changelog from dev branch into master 2018-04-18 18:50:35 +00:00
codereview.settings Update codereview.settings to Gerrit (dart-review.googlesource.com) 2017-09-04 12:52:09 +00:00
dartdoc_options.yaml Update dartdoc to v0.18.0 and tag library categories. 2018-03-27 16:19:34 +00:00
DEPS Bump Linter to 0.1.49 2018-04-20 20:23:47 +00:00
LICENSE Remove the Dromaeo and TodoMVC samples. 2016-01-11 13:09:26 -08:00
PATENTS
PRESUBMIT.py Move new tests from tests/isolate to tests/lib_2/isolate. 2018-02-22 10:03:23 +00:00
README.dart-sdk remove docgen from the sdk 2015-09-18 13:18:10 -07:00
README.md [gardening] Whitespace change to trigger bots. 2017-04-28 10:08:58 -07:00
WATCHLISTS Creates a watchlist for sdk/lib/_http and adds me to it 2018-01-02 18:39:53 +00:00

README.md

Dart

Dart is an open-source, scalable programming language, with robust libraries and runtimes, for building web, server, and mobile apps.

Using Dart

Visit the dartlang.org to learn more about the language, tools, getting started, and more.

Browse pub.dartlang.org for more packages and libraries contributed by the community and the Dart team.

Building Dart

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.

Contributing to Dart

The easiest way to contribute to Dart is to file issues.

You can also contribute patches, as described in Contributing.

License & patents

See LICENSE and PATENTS.