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Sathya Gunasekaran ca1c77ab18 Revert "[TurboProp] Add MidTierMachineLoweringPhase to avoid Late/MemoryOptimizationPhases" 
This reverts commit c70de45c6a.

Reason for revert: speculative revert

Original change's description:
> [TurboProp] Add MidTierMachineLoweringPhase to avoid Late/MemoryOptimizationPhases
> 
> Adds a MidTierMachineLoweringPhase which does select and memory lowering to machine
> nodes. This allows TurboProp to avoid the LateOptimizationPhase and
> MemoryOptimizationPhase phases while still lowering all simplified nodes to
> machine nodes before instruction selection.
> 
> BUG=v8:9684
> 
> Change-Id: I60533db93152ff044a2fa8c1c31adedeb3747856
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1815130
> Reviewed-by: Georg Neis <neis@chromium.org>
> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#63981}

TBR=rmcilroy@chromium.org,neis@chromium.org

Change-Id: I99cddb2c435ad6347bdc9b61b95d48dca94294c7
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:9684
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1826720
Reviewed-by: Sathya Gunasekaran  <gsathya@chromium.org>
Commit-Queue: Sathya Gunasekaran  <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63984}
2019-09-26 11:32:58 +00:00
benchmarks Use relative paths to OWNERS files 2019-08-12 13:52:52 +00:00
build_overrides Use relative paths to OWNERS files 2019-08-12 13:52:52 +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 [tools] Use instance types of known Maps in v8_debug_helper 2019-09-20 16:00:59 +00:00
include Add support for reporting raw Wasm scripts 2019-09-25 14:05:26 +00:00
infra [test] Bump shards on slow bot 2019-09-26 10:15:57 +00:00
samples [cleanup] Drop some occurrences of Isolate::Current 2019-06-26 19:39:21 +00:00
src Revert "[TurboProp] Add MidTierMachineLoweringPhase to avoid Late/MemoryOptimizationPhases" 2019-09-26 11:32:58 +00:00
test Revert "[TurboProp] Add MidTierMachineLoweringPhase to avoid Late/MemoryOptimizationPhases" 2019-09-26 11:32:58 +00:00
testing Use relative paths to OWNERS files 2019-08-12 13:52:52 +00:00
third_party Remove unnecessary HasOwnProperty check from Array#sort 2019-09-18 12:39:43 +00:00
tools Change all TODOs from clemensh to clemensb 2019-09-26 10:25:27 +00:00
.clang-format
.clang-tidy
.editorconfig
.flake8 Add .flake8 to allow for python style checking. 2019-07-19 21:44:03 +00:00
.git-blame-ignore-revs Add recent code rewrite to .git-blame-ignore-revs 2019-05-23 10:38:45 +00:00
.gitattributes
.gitignore Remove MIPS(64) builders from V8 infra 2019-09-16 11:20:11 +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
AUTHORS [log] report code relocation through CodeEventHandler 2019-09-24 10:50:05 +00:00
BUILD.gn [builtins] Port RegExp MatchAll to Torque 2019-09-25 20:41:28 +00:00
ChangeLog
CODE_OF_CONDUCT.md
codereview.settings
COMMON_OWNERS Rename clemensh to clemensb in OWNERS 2019-09-26 08:44:44 +00:00
DEPS Revert "Update V8 DEPS." 2019-09-26 07:29:37 +00:00
ENG_REVIEW_OWNERS Add eng review owners as escalation path 2019-05-15 19:12:10 +00:00
INFRA_OWNERS Clean up infra owners 2019-05-15 11:18:43 +00:00
INTL_OWNERS Add missing owners files 2019-05-31 07:21:01 +00:00
LICENSE [wasm] Draft version of C/C++ Wasm API 2019-04-17 16:00:26 +00:00
LICENSE.fdlibm
LICENSE.strongtalk
LICENSE.v8
LICENSE.valgrind
MIPS_OWNERS Move architecture dependent files 2019-05-28 14:02:15 +00:00
OWNERS Add syg@chromium.org as DEPS owner for test262 rolls 2019-09-17 19:29:11 +00:00
PPC_OWNERS Move architecture dependent files 2019-05-28 14:02:15 +00:00
PRESUBMIT.py Change all TODOs from clemensh to clemensb 2019-09-26 10:25:27 +00:00
README.md
S390_OWNERS Move architecture dependent files 2019-05-28 14:02:15 +00:00
WATCHLISTS Move remaining files in src/ 2019-05-24 18:24:36 +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.