10bbbf13a2
The mid-tier register allocator could not handle the case that the same virtual register was used for - the input corresponding to the 'same-as-input' output, and - another 'unique register' input. In this case, it cannot choose the already assigned register for the 'unique' register. Instead, it needs to allocate a new register and introduce a gap move to duplicate the input value in two different registers. FYI, the instruction where the current logic failed was: (v5(0), v6(R)) = IA32AddPair v7(R) v7(*) v8(R) v7(R) (where the last input was marked 'unique'). R=leszeks@chromium.org CC=thibaudm@chromium.org Bug: v8:12330, chromium:1272204 Change-Id: Ie4843aa9f5e027afe503e0481a4acdfa325dfe0e Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3347821 Reviewed-by: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Maya Lekova <mslekova@chromium.org> Commit-Queue: Clemens Backes <clemensb@chromium.org> Cr-Commit-Position: refs/heads/main@{#78411} |
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| infra | ||
| samples | ||
| src | ||
| test | ||
| testing | ||
| third_party | ||
| tools | ||
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| .mailmap | ||
| .vpython | ||
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| .ycm_extra_conf.py | ||
| AUTHORS | ||
| BUILD.bazel | ||
| BUILD.gn | ||
| CODE_OF_CONDUCT.md | ||
| codereview.settings | ||
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| DEPS | ||
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| LICENSE | ||
| LICENSE.fdlibm | ||
| LICENSE.strongtalk | ||
| LICENSE.v8 | ||
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| PPC_OWNERS | ||
| PRESUBMIT.py | ||
| README.md | ||
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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.