deps: V8: cherry-pick 56f6a76 #25269
Closed
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original commit message:
[turbofan] Fix -0 check for subnormals.
Previously we'd check `x` for -0 by testing `(1.0 / x) == -Infinity`,
but this will yield the wrong results when `x` is a subnormal, i.e.
really close to 0.
In CSA we already perform bit checks to test for -0, so teach TurboFan
to do the same for comparisons to -0 (via `Object.is`). We introduce a
new NumberIsMinusZero simplified operator to handle the case where
SimplifiedLowering already knows that the input is a number.
Bug: chromium:903043, v8:6882
Change-Id: I0cb7c568029b461a92fc183104d5f359b4bfe7f4
Reviewed-on: https://chromium-review.googlesource.com/c/1328802
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{nodejs#57382}
Refs: v8/v8@56f6a76
nodejs-github-bot
added
build
fhinkel
approved these changes
Dec 29, 2018
ryzokuken
approved these changes
Dec 29, 2018
devsnek
approved these changes
Dec 29, 2018
|
just as a funny sidenote, we made the same mistake in node core :p #17507 |
jasnell
approved these changes
Jan 8, 2019
BridgeAR
added
the
author ready
|
Resumed yellow CI https://ci.nodejs.org/job/node-test-pull-request/20008/ |
danbev
pushed a commit
that referenced
this pull request
Jan 9, 2019
Original commit message:
[turbofan] Fix -0 check for subnormals.
Previously we'd check `x` for -0 by testing `(1.0 / x) == -Infinity`,
but this will yield the wrong results when `x` is a subnormal, i.e.
really close to 0.
In CSA we already perform bit checks to test for -0, so teach TurboFan
to do the same for comparisons to -0 (via `Object.is`). We introduce a
new NumberIsMinusZero simplified operator to handle the case where
SimplifiedLowering already knows that the input is a number.
Bug: chromium:903043, v8:6882
Change-Id: I0cb7c568029b461a92fc183104d5f359b4bfe7f4
Reviewed-on: https://chromium-review.googlesource.com/c/1328802
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57382}
PR-URL: #25269
Refs: v8/v8@56f6a76
Fixes: #25268
Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>
Reviewed-By: Franziska Hinkelmann <franziska.hinkelmann@gmail.com>
Reviewed-By: Ujjwal Sharma <usharma1998@gmail.com>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
|
@BridgeAR This would need a manual backport to v11.x-staging (it applies cleanly but does not compile) |
|
@addaleax I would like to backport this and it lands cleanly on v11.x but it relies on some other code and I do not know the code base well enough to backport this on my own (see also #25270 (comment)). It would be great if the @nodejs/v8-update could have a look at backporting this. |
|
Attempts to backport to v11 and v10: |
This was referenced Apr 23, 2019
# for free
to join this conversation on GitHub.
Already have an account?
# to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Original commit message:
Refs: v8/v8@56f6a76
Fixes: #25268
Checklist
make -j4 test(UNIX), orvcbuild test(Windows) passes