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Leszek Swirski b4deef6168 [turbofan] Add deopt reason to CheckIf 
CheckIf is lowered to DeoptimizeIfNot, but there is no deoptimization
reason given in the deopt if that check fails (the reason is hardcoded
to "no reason"). These deopts are annoying to track down.

This patch makes CheckIf an operator with a DeoptimizeReason parameter,
which is passed through to the DeoptimizeIfNot when lowered.
A couple of checks are converted to give good deoptimize reasons (some
new reasons are introduced), and the others are defaulted to kNoReason
until someone else finds a use for them.

Change-Id: I7e910cc9579ccf978dfe9d270ba7b98c8f6c2492
Reviewed-on: https://chromium-review.googlesource.com/716479
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48506}
2017-10-12 16:07:11 +00:00
benchmarks Fix common misspellings 2017-08-02 09:35:28 +00:00
build_overrides Remove build_override for macOS min SDK and deployment target. 2017-07-14 18:24:44 +00:00
docs [Docs] Removed unused docs because they are moved to GitHub 2015-11-19 10:23:30 +00:00
gni Reland "[build] Switch windows default compilation to MSVS 2017" 2017-09-29 09:36:49 +00:00
gypfiles [test] Remove valgrind support 2017-10-11 07:41:33 +00:00
include Bump version to 6.4 2017-10-12 13:00:37 +00:00
infra [test] Remove valgrind support 2017-10-11 07:41:33 +00:00
samples [presubmit] Enable and fix "build/namespaces" linter check. 2017-09-04 11:24:26 +00:00
src [turbofan] Add deopt reason to CheckIf 2017-10-12 16:07:11 +00:00
test [ic] Introduce proper slow stub for StoreGlobalIC. 2017-10-12 14:07:41 +00:00
testing Use GTEST_LANG_CXX11 in V8 2016-07-25 13:06:42 +00:00
third_party Roll third_party/inspector_protocol to 8cb7a4f50ff7d5b1b7f2e5df0542dc577c88bdc3 2017-10-11 22:52:17 +00:00
tools [heap] Add TSAN suppression for lock-order inversion in Scavenger 2017-10-12 14:31:41 +00:00
.clang-format [clang-format] Don't derive pointer alignment 2017-01-17 09:28:19 +00:00
.editorconfig Add .editorconfig 2017-07-28 13:39:24 +00:00
.git-blame-ignore-revs [build] Add DEPS formatting to hyper-blame 2017-10-09 14:08:45 +00:00
.gitignore [wasm] Add uma stat for wasm lazy throughput 2017-10-11 21:00:22 +00:00
.gn For building v8 using gn on aix_ppc64, linux_s390x and linux_ppc64(both LE and BE). 2017-05-12 01:35:09 +00:00
.ycm_extra_conf.py Use C++11 / gnu++11, not 0x 2016-03-22 15:24:43 +00:00
AUTHORS [asm.js] Fix infinite loop in parser on parse error. 2017-10-04 16:13:39 +00:00
BUILD.gn [turbofan] Use AllocationBuilder helper class everywhere. 2017-10-12 13:54:12 +00:00
ChangeLog [Release] Update ChangeLog file 2016-02-17 21:29:09 +00:00
CODE_OF_CONDUCT.md Explicitly state that the Chromium Code of Conduct also applies to V8 2016-03-02 09:51:24 +00:00
codereview.settings Make Gerrit the default code review for V8 2017-06-30 17:37:37 +00:00
DEPS Update V8 DEPS. 2017-10-12 03:49:04 +00:00
LICENSE Updates to the license information of third party components. 2015-06-16 12:37:50 +00:00
LICENSE.fdlibm Add LICENSE.fdlibm for all the fdlibm imported sources. 2016-06-09 07:17:03 +00:00
LICENSE.strongtalk Add LICENSE.v8, LICENSE.strongtalk and LICENSE.valgrind to the v8 2011-02-03 07:10:06 +00:00
LICENSE.v8 Add LICENSE.v8, LICENSE.strongtalk and LICENSE.valgrind to the v8 2011-02-03 07:10:06 +00:00
LICENSE.valgrind Add LICENSE.v8, LICENSE.strongtalk and LICENSE.valgrind to the v8 2011-02-03 07:10:06 +00:00
Makefile [heap] Port concurrent marking flag to GYP. 2017-08-23 15:26:43 +00:00
Makefile.android [build] Fix d8-for-Android builds 2016-05-20 12:10:45 +00:00
OWNERS Add eholk and gdeepti to toplevel owners 2017-08-12 07:07:29 +00:00
PRESUBMIT.py [iwyu] Turn inclusion presubmit warning into and error. 2017-09-14 10:17:58 +00:00
README.md [Docs] Removed unused docs because they are moved to GitHub 2015-11-19 10:23:30 +00:00
snapshot_toolchain.gni MIPS[64]: Add support for big endian build using GN 2017-06-02 15:02:18 +00:00
WATCHLISTS [V8Tracing] Add lpy@ and fmeawad@ into watchlist for tracing/. 2017-05-22 19:40:17 +00:00

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://github.com/v8/v8/wiki

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/*

Contributing

Please follow the instructions mentioned on the V8 wiki.