[ic] In KeyedStoreIC use the new receiver map instead of computing transitions

KeyedStoreIC computes the expected transition to the map based on the
incoming receiver map, the index and the value that is being stored.
Since we already store the element into the object, the runtime would
have already computed these transitions and it is possible to use the
new map of the object instead of recomputing the map. Though we would
need additional checks to see the newly transitioned map is indeed
a more generic elements transition and not an unexpected transition.

Bug: v8:8394
Change-Id: If6819895e5d20dd76bb062c6064593bf3a920778
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1621937
Commit-Queue: Mythri Alle <mythria@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61743}
2 files changed
tree: bcd7170a3c09ee8df5ca083ac2ba487a8c881dcd
  1. .clang-format
  2. .clang-tidy
  3. .editorconfig
  4. .git-blame-ignore-revs
  5. .gitattributes
  6. .gitignore
  7. .gn
  8. .vpython
  9. .ycm_extra_conf.py
  10. AUTHORS
  11. BUILD.gn
  12. CODE_OF_CONDUCT.md
  13. COMMON_OWNERS
  14. ChangeLog
  15. DEPS
  16. ENG_REVIEW_OWNERS
  17. INFRA_OWNERS
  18. LICENSE
  19. LICENSE.fdlibm
  20. LICENSE.strongtalk
  21. LICENSE.v8
  22. LICENSE.valgrind
  23. OWNERS
  24. PRESUBMIT.py
  25. README.md
  26. WATCHLISTS
  27. benchmarks/
  28. build_overrides/
  29. codereview.settings
  30. custom_deps/
  31. docs/
  32. gni/
  33. include/
  34. infra/
  35. samples/
  36. src/
  37. test/
  38. testing/
  39. third_party/
  40. tools/
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.