Revert "[turbofan] Make sure TruncatingUseInfoFromRepresentation respects Smi representation."

This reverts commit cc07ac73a460de3d933ebe7aebf0f55b741eb5cf.

Reason for revert: Breaks benchmarks:
http://shortn/_POjH6zA7tp

Original change's description:
> [turbofan] Make sure TruncatingUseInfoFromRepresentation respects Smi representation.
> 
> Eventually, we want to fix this also for tagged pointers (tracking bug: https://crbug.com/v8/7162).
> 
> Bug: chromium:791245
> Change-Id: I93d6deff36cedcc9a4665fab0abe6fffdae9b61b
> Reviewed-on: https://chromium-review.googlesource.com/806457
> Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
> Commit-Queue: Jaroslav Sevcik <jarin@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#49850}

TBR=jarin@chromium.org,bmeurer@chromium.org

Change-Id: I0ff571b161ec40ba1f32ee048f8255c42414d8d2
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:791245
Reviewed-on: https://chromium-review.googlesource.com/807985
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49853}
4 files changed
tree: 5ec89cc4a14bacb791620bcce701d7c8327fd31d
  1. benchmarks/
  2. build_overrides/
  3. docs/
  4. gni/
  5. gypfiles/
  6. include/
  7. infra/
  8. samples/
  9. src/
  10. test/
  11. testing/
  12. third_party/
  13. tools/
  14. .clang-format
  15. .editorconfig
  16. .git-blame-ignore-revs
  17. .gitignore
  18. .gn
  19. .vpython
  20. .ycm_extra_conf.py
  21. AUTHORS
  22. BUILD.gn
  23. ChangeLog
  24. CODE_OF_CONDUCT.md
  25. codereview.settings
  26. DEPS
  27. LICENSE
  28. LICENSE.fdlibm
  29. LICENSE.strongtalk
  30. LICENSE.v8
  31. LICENSE.valgrind
  32. Makefile
  33. Makefile.android
  34. OWNERS
  35. PRESUBMIT.py
  36. README.md
  37. snapshot_toolchain.gni
  38. WATCHLISTS
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://github.com/v8/v8/wiki

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 on the V8 wiki.