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Seth Brenith abb7cdc91f [regalloc] Loop-top values can be backedges too 
When counting which backedges conflict with a loop-top phi value, we
should include values introduced at the start of the loop.

I don't expect this change to make performance differences on its own,
but it is a step toward changing the heuristic so that we're less likely
to introduce unnecessary load/store pairs across the backedge.

Bug: v8:10606
Change-Id: I299e388b0b964573119ba0b775d50f398c467c46
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2385715
Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#69752}
2020-09-08 17:18:12 +00:00
build_overrides tracing: Enable using Perfetto client library from Chromium 2020-05-11 11:17:57 +00:00
custom_deps Use relative paths to OWNERS files 2019-08-12 13:52:52 +00:00
docs Add OWNERS for docs/ 2019-05-15 12:06:15 +00:00
gni [heap] Add object start bitmap for conservative stack scanning 2020-08-31 07:10:36 +00:00
include [Jobs API]: Cleanup migration of missing Jobs pieces. 2020-09-02 20:51:29 +00:00
infra [test] Bump shards on slow builder 2020-09-01 19:36:59 +00:00
samples cppgc: Add DefaultPlatform and standalone sample 2020-07-23 09:54:32 +00:00
src [regalloc] Loop-top values can be backedges too 2020-09-08 17:18:12 +00:00
test Revert "[wasm][liftoff] Support for most externref globals" 2020-09-08 14:18:05 +00:00
testing Roll v8/third_party/googletest/src/ 10b1902d8..e3f0319d8 (43 commits) 2020-04-15 07:23:10 +00:00
third_party [csa][cleanup] Remove ParameterMode/TNodify StoreFixedDoubleArrayElement 2020-08-26 17:14:44 +00:00
tools [Torque] Port some (Shared)ArrayBuffer APIs 2020-09-08 15:06:02 +00:00
.clang-format [clang-format] Don't derive pointer alignment 2017-01-17 09:28:19 +00:00
.clang-tidy [tool] Remove unfixed clang-tidy warnings to ease use. 2018-10-26 07:40:32 +00:00
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.gitattributes .gitattributes: Mark minified emscripten js files as -diff 2018-09-19 16:27:10 +00:00
.gitignore Revert "[presubmit] Add JS formatting for tools/system-analyzer" 2020-07-17 10:33:40 +00:00
.gn [build] Dynamically decide if to use system xcode 2019-07-29 08:20:24 +00:00
.vpython [tools] Implement confidence-based number of runs 2019-05-09 09:42:28 +00:00
.ycm_extra_conf.py Fix ycm config for headers without source 2019-12-09 11:59:21 +00:00
AUTHORS Check interrupts in runtime BigInt parser 2020-09-07 15:21:33 +00:00
BUILD.gn [Torque] Port some (Shared)ArrayBuffer APIs 2020-09-08 15:06:02 +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
COMMON_OWNERS Adding vahl@ to the common owners to be able to handle 2020-08-21 09:04:56 +00:00
DEPS Update V8 DEPS. 2020-09-08 03:32:13 +00:00
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LICENSE [wasm] Draft version of C/C++ Wasm API 2019-04-17 16:00:26 +00:00
LICENSE.fdlibm Add LICENSE.fdlibm for all the fdlibm imported sources. 2016-06-09 07:17:03 +00:00
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PRESUBMIT.py [presubmit] Allow use of test functions in runtime-test.cc 2020-08-10 12:12:55 +00:00
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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://v8.dev/docs

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 at v8.dev/docs/contribute.