MIPS: Introduce LanguageMode, drop StrictMode.

Port c7851da4aefb644ab198ead1fa284932fd424797

Original commit message:
This enables adding more language modes in the future.

For maximum flexibility, LanguageMode is a bitmask, so we're not restricted to
use a sequence of language modes which are progressively stricter, but we can
express the language mode as combination of features.

For now, LanguageMode can only be "sloppy" or "strict", and there are
STATIC_ASSERTS in places which need to change when more modes are added.

LanguageMode is a bit like the old LanguageMode when "extended" mode was still
around (see https://codereview.chromium.org/8417035 and
https://codereview.chromium.org/181543002 ) except that it's transmitted through
all the layers (there's no StrictModeFlag).

BUG=

Review URL: https://codereview.chromium.org/890413003

Cr-Commit-Position: refs/heads/master@{#26431}
13 files changed
tree: 682a861ac7044d6a273337be45a9b7fd3afda202
  1. benchmarks/
  2. build/
  3. include/
  4. samples/
  5. src/
  6. test/
  7. testing/
  8. tools/
  9. .clang-format
  10. .gitignore
  11. AUTHORS
  12. BUILD.gn
  13. ChangeLog
  14. codereview.settings
  15. DEPS
  16. LICENSE
  17. LICENSE.strongtalk
  18. LICENSE.v8
  19. LICENSE.valgrind
  20. Makefile
  21. Makefile.android
  22. Makefile.nacl
  23. OWNERS
  24. PRESUBMIT.py
  25. README.md
  26. WATCHLISTS
README.md

V8 JavaScript Engine

V8 is Google's open source JavaScript engine.

V8 implements ECMAScript as specified in ECMA-262.

V8 is written in C++ and is used in Google Chrome, the open source browser from Google.

V8 can run standalone, or can be embedded into any C++ application.

V8 Project page: https://code.google.com/p/v8/

Getting the Code

Checkout depot tools, and run

fetch v8

This will checkout V8 into the directory v8 and fetch all of its dependencies. To stay up to date, run

git pull origin gclient sync

For fetching all branches, add the following into your remote configuration in .git/config:

    fetch = +refs/branch-heads/*:refs/remotes/branch-heads/*
    fetch = +refs/tags/*:refs/tags/*