e68a51f7b6
ChangeTaggedSignedToInt32(ChangeCompressedSignedToTaggedSigned((x)) ->
ChangeCompressedSignedToInt32(x)
This pattern shows up in the Octane Richards benchmark (on arm64):
sxtw x11, w10
asr w11, w11, #1
This patch will remove the sxtw.
ChangeCompressedSignedToInt32(CheckedInt32ToCompressedSigned(x)) -> x
This pattern shows up in the Octane Richards benchmark (on arm64):
adds w10, w10, w10
b.vs #+0x1118
asr w11, w10, #1
stur w10, [x6, #19]
cmp w11, #0x1a
This patch will remove the asr, and produce:
adds w11, w10, w10
b.vs #+0x1108
stur w11, [x6, #19]
cmp w10, #0x1a
Bug: v8:7703
Change-Id: I5843e0a4f723b202857ee86130f835cd048d7e31
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1763529
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Santiago Aboy Solanes <solanes@chromium.org>
Commit-Queue: Rodolph Perfetta <rodolph.perfetta@arm.com>
Cr-Commit-Position: refs/heads/master@{#63389}
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|---|---|---|
| benchmarks | ||
| build_overrides | ||
| custom_deps | ||
| docs | ||
| gni | ||
| include | ||
| infra | ||
| samples | ||
| src | ||
| test | ||
| testing | ||
| third_party | ||
| tools | ||
| .clang-format | ||
| .clang-tidy | ||
| .editorconfig | ||
| .flake8 | ||
| .git-blame-ignore-revs | ||
| .gitattributes | ||
| .gitignore | ||
| .gn | ||
| .vpython | ||
| .ycm_extra_conf.py | ||
| AUTHORS | ||
| BUILD.gn | ||
| ChangeLog | ||
| CODE_OF_CONDUCT.md | ||
| codereview.settings | ||
| COMMON_OWNERS | ||
| DEPS | ||
| ENG_REVIEW_OWNERS | ||
| INFRA_OWNERS | ||
| INTL_OWNERS | ||
| LICENSE | ||
| LICENSE.fdlibm | ||
| LICENSE.strongtalk | ||
| LICENSE.v8 | ||
| LICENSE.valgrind | ||
| MIPS_OWNERS | ||
| OWNERS | ||
| PPC_OWNERS | ||
| PRESUBMIT.py | ||
| README.md | ||
| S390_OWNERS | ||
| WATCHLISTS | ||
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.