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Maya Lekova 596e56868d [turboshaft] Implement structural optimization reducer 
This CL adds a new Turboshaft reducer that is suitable for changing the
graph in a way that doesn't reduce individual operations, rather changes
the structure of the graph. The first such reduction we support is
transforming if-else cascades that check if a given value is equal to
any constant from a given set into a switch with cases corresponding to
the constants in the set.

Bug: v8:12783
Change-Id: Iee1e5581a334c3dc255d673d2178f76706e6dae2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/4106752
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/main@{#85561}
2023-01-31 14:27:23 +00:00
.github
bazel [turbofan] Add the v8_enable_turbofan build option 2023-01-11 10:57:54 +00:00
build_overrides
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 [gn] Provide explicit name in component builds 2023-01-26 12:05:07 +00:00
include cppgc: Introduce subtle::UncompressedMember 2023-01-26 23:51:28 +00:00
infra Configure PGO builders 2023-01-27 13:54:32 +00:00
samples [sandbox] Initialize sandbox during V8::Initialize 2022-07-15 09:29:32 +00:00
src [turboshaft] Implement structural optimization reducer 2023-01-31 14:27:23 +00:00
test [NumFuzz] Skip test with contradictory flags on NumFuzz 2023-01-31 13:07:35 +00:00
testing
third_party [reland] adds the ability for v8 to use sin/cos from libm 2022-12-02 21:59:04 +00:00
tools [web snapshots] Remove web snapshots 2023-01-31 12:43:03 +00:00
.bazelrc
.clang-format
.clang-tidy [tool] Remove unfixed clang-tidy warnings to ease use. 2018-10-26 07:40:32 +00:00
.editorconfig Add .editorconfig 2017-07-28 13:39:24 +00:00
.flake8 remove swarming_client 2021-08-24 10:39:33 +00:00
.git-blame-ignore-revs [git blame] Add a few old refactors to .git-blame-ignore-revs 2023-01-04 15:43:38 +00:00
.gitattributes .gitattributes: Mark minified emscripten js files as -diff 2018-09-19 16:27:10 +00:00
.gitignore [tools] Improve run_perf.py 2023-01-31 10:24:16 +00:00
.gn [fuchsia] Add API target level default value 2022-08-29 14:46:45 +00:00
.mailmap Add .mailmap entries for jgruber 2022-08-04 08:53:02 +00:00
.style.yapf
.vpython3 Reland "[resultdb] Add ResultDB indicator" 2022-10-14 11:05:59 +00:00
.ycm_extra_conf.py [ycm] Fix YouCompleteMe config 2022-11-02 15:59:48 +00:00
AUTHORS Revert "[turbofan] Optimize access to the length property of functions" 2023-01-23 08:58:42 +00:00
BUILD.bazel [turboshaft] Implement structural optimization reducer 2023-01-31 14:27:23 +00:00
BUILD.gn [turboshaft] Implement structural optimization reducer 2023-01-31 14:27:23 +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 [owners] Add mliedtke to COMMON_OWNERS 2022-09-16 14:12:27 +00:00
DEPS Update V8 DEPS (trusted) 2023-01-31 03:56:09 +00:00
DIR_METADATA Add DIR_METADATA files to v8. 2020-10-20 22:12:28 +00:00
ENG_REVIEW_OWNERS Add mlippautz@ to ENG_REVIEW_OWNERS. 2022-10-06 18:48:33 +00:00
INFRA_OWNERS
INTL_OWNERS add ftang as owner 2020-04-24 19:19:36 +00:00
LICENSE [mips32] Delete mips32 from v8 2022-09-13 07:54:54 +00:00
LICENSE.fdlibm Add LICENSE.fdlibm for all the fdlibm imported sources. 2016-06-09 07:17:03 +00:00
LICENSE.strongtalk
LICENSE.v8
LOONG_OWNERS
MIPS_OWNERS [mips] Add LiuYu to MIPS_OWNERS 2021-09-08 01:38:52 +00:00
OWNERS Make .ycm_extra_conf owned by COMMON_OWNERS 2022-11-07 09:51:53 +00:00
PPC_OWNERS PPC/S390: cleanup owner files 2023-01-23 17:07:21 +00:00
PRESUBMIT.py [presubmit] Handle Windows path for header guard check 2022-12-13 17:30:02 +00:00
README.md [docs] Change links from old wiki to v8.dev 2019-03-07 12:13:30 +00:00
RISCV_OWNERS Add Lu Yahan to RISC-V owners list 2021-09-13 16:35:00 +00:00
S390_OWNERS PPC/S390: cleanup owner files 2023-01-23 17:07:21 +00:00
WATCHLISTS Add a WATCHLIST entry for trap-handler 2023-01-18 09:00:37 +00:00
WORKSPACE [bazel] Remove zlib dependency 2022-08-17 15:30:25 +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://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.