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7a61dad0db
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Tobias Tebbi 7a61dad0db [turboshaft] some IR refactorings 
- Remove TruncateInt64ToInt32 instead of translating to Turboshaft, since it has no effect. Removing it simplifies pattern-matching in optimizations.
- Change how exception handling is done in Turboshaft: The exception value is obtained as the result of `CatchExceptionOp` instead of a special projection. This simplifies projections.
- Add `TupleOp` as the counterpart to `ProjectionOp`, which is useful
  for lowerings of operations that have multiple outputs.

- Split BinopOp into WordBinopOp and FloatBinopOp because they have quite different semantics and many kinds only exist for one of them.
- rename IntegerUnary to WordUnary and other occurences of
  Integer/Integral
- rename ChangeOp::Kind::kUnsignedFloatTruncate` to `kJSFloatTruncate`
  because it actually has JS wrap-around semantics.
- move/add representation DCHECKs to operation constructors.
- add some convinience helpers to `AssemblerInterface`.

- Add a mechanism to check which operations are supported by the machine.

Drive-by fix: Abort current block in OptimizationPhase::VisitBlock if
  we lower to a block-terminator.

Bug: v8:12783
Change-Id: Ib738accccd22fb1606d9dab86f57ac1e739fcec2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3857449
Auto-Submit: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Darius Mercadier <dmercadier@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82857}
2022-08-31 10:13:47 +00:00
.github [github] Close PRs created on the V8 GitHub mirror automatically 2021-01-12 08:39:59 +00:00
bazel [bazel] Remove zlib dependency 2022-08-17 15:30:25 +00:00
build_overrides [build] Remove obsolete gn flag 2021-01-11 15:50:59 +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 cppgc: Return 4GB cage back 2022-08-30 17:07:16 +00:00
include [cppgc, cppgc-js] Implement GC on allocation failure 2022-08-30 19:36:18 +00:00
infra [test] Add no-sse3 testing to CQ builders 2022-08-30 15:07:17 +00:00
samples [sandbox] Initialize sandbox during V8::Initialize 2022-07-15 09:29:32 +00:00
src [turboshaft] some IR refactorings 2022-08-31 10:13:47 +00:00
test Revert "[debug] Immediately step-in for 'stack check triggered' debug breaks" 2022-08-31 09:37:34 +00:00
testing [test] Migrate cctest/test-api-accessors.cc to unittests/ 2022-05-17 08:27:55 +00:00
third_party [change-array-by-copy] Implement Array.prototype.toSorted 2022-08-16 14:11:53 +00:00
tools [cleanup] Fix frame mismatch for WasmToJs functions 2022-08-31 09:58:58 +00:00
.bazelrc [bazel] Use v8_enable_handle_zapping only in debug builds. 2022-01-11 11:32:39 +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
.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 [infra] Update .git-blame-ignore-revs 2020-03-03 12:59:13 +00:00
.gitattributes .gitattributes: Mark minified emscripten js files as -diff 2018-09-19 16:27:10 +00:00
.gitignore [cleanup] Add .idea to .gitignore 2022-08-22 19:54:38 +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 [tools] Add basic pointer compression to grokdump 2022-02-04 14:35:26 +00:00
.vpython Verify mac-arm64 wheels for v8/.vpython spec. 2021-09-15 21:11:50 +00:00
.vpython3 [python3] Add missing python3 dependency 2022-06-07 14:55:36 +00:00
.ycm_extra_conf.py [ycm] Fix python script 2021-07-29 09:48:32 +00:00
AUTHORS [buildins] Use ACCESSOR_GETTER_LIST to expose accessor getters 2022-08-29 08:58:37 +00:00
BUILD.bazel [turboshaft] some IR refactorings 2022-08-31 10:13:47 +00:00
BUILD.gn [turboshaft] some IR refactorings 2022-08-31 10:13:47 +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 add tebbi@chromium.org to COMMON_OWNERS 2022-03-08 14:08:25 +00:00
DEPS Update V8 DEPS (trusted) 2022-08-31 03:59:03 +00:00
DIR_METADATA Add DIR_METADATA files to v8. 2020-10-20 22:12:28 +00:00
ENG_REVIEW_OWNERS Adding vahl@ as owner to speed up merge handling 2022-07-01 08:06:14 +00:00
INFRA_OWNERS [infra] Add alexschulze@ as infra owner 2022-07-18 09:08:54 +00:00
INTL_OWNERS add ftang as owner 2020-04-24 19:19:36 +00:00
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
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
LOONG_OWNERS [LOONG64] Add LoongArch64 backend 2021-08-16 13:05:19 +00:00
MIPS_OWNERS [mips] Add LiuYu to MIPS_OWNERS 2021-09-08 01:38:52 +00:00
OWNERS Reland "[riscv32] Add RISCV32 backend" 2022-08-04 12:47:44 +00:00
PPC_OWNERS Adding myself to relevant OWNERS files. 2020-11-02 16:37:28 +00:00
PRESUBMIT.py [wasm] Limit module size in streaming decoder 2022-07-08 09:43:41 +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 Adding myself to relevant OWNERS files. 2020-11-02 16:37:28 +00:00
WATCHLISTS Reland "[WATCHLISTS] Add riscv watch" 2022-08-19 07:33:57 +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.