Bug 150687 - cdjs-tests.yaml/main.js.ftl fails due to FTL ArithSub code for supporting UntypedUse operands
Summary: cdjs-tests.yaml/main.js.ftl fails due to FTL ArithSub code for supporting Unt...
Alias: None
Product: WebKit
Classification: Unclassified
Component: JavaScriptCore (show other bugs)
Version: WebKit Local Build
Hardware: Unspecified Unspecified
: P2 Normal
Assignee: Mark Lam
Depends on:
Blocks: 150562
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Reported: 2015-10-29 12:59 PDT by Mark Lam
Modified: 2015-10-29 16:41 PDT (History)
7 users (show)

See Also:

patch to disable the feature. (1.55 KB, patch)
2015-10-29 13:05 PDT, Mark Lam
commit-queue: commit-queue-
Details | Formatted Diff | Diff
Fixed ChangeLog comment. (1.55 KB, patch)
2015-10-29 13:12 PDT, Mark Lam
no flags Details | Formatted Diff | Diff

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Description Mark Lam 2015-10-29 12:59:16 PDT
For example, see https://build.webkit.org/builders/Apple%20El%20Capitan%20Debug%20JSC%20%28Tests%29/builds/422.

This issue does not always reproduces.  But on the machines where they do reproduce, it reproduces consistently.

Will disable the feature temporarily until I figure out what the issue is.
Comment 1 Mark Lam 2015-10-29 13:02:11 PDT
This issue is strictly in the FTL and 64-bit only.  There were some 32-bit JSC bots that appeared to be failing due to this.  That was due to a configuration bug on those bots where they were accidentally building 64-bit instead of 32-bit.  That issue has been fixed in http://trac.webkit.org/changeset/191747.
Comment 2 Mark Lam 2015-10-29 13:05:39 PDT
Created attachment 264336 [details]
patch to disable the feature.
Comment 3 WebKit Commit Bot 2015-10-29 13:10:51 PDT
Comment on attachment 264336 [details]
patch to disable the feature.

Rejecting attachment 264336 [details] from commit-queue.

Failed to run "['/Volumes/Data/EWS/WebKit/Tools/Scripts/webkit-patch', '--status-host=webkit-queues.webkit.org', '--bot-id=webkit-cq-02', 'validate-changelog', '--check-oops', '--non-interactive', 264336, '--port=mac']" exit_code: 1 cwd: /Volumes/Data/EWS/WebKit

/Volumes/Data/EWS/WebKit/Source/JavaScriptCore/ChangeLog neither lists a valid reviewer nor contains the string "Unreviewed" or "Rubber stamp" (case insensitive).

Full output: http://webkit-queues.webkit.org/results/354537
Comment 4 Mark Lam 2015-10-29 13:12:44 PDT
Created attachment 264338 [details]
Fixed ChangeLog comment.
Comment 5 WebKit Commit Bot 2015-10-29 14:08:54 PDT
Comment on attachment 264338 [details]
Fixed ChangeLog comment.

Clearing flags on attachment: 264338

Committed r191753: <http://trac.webkit.org/changeset/191753>
Comment 6 WebKit Commit Bot 2015-10-29 14:09:00 PDT
All reviewed patches have been landed.  Closing bug.
Comment 7 Filip Pizlo 2015-10-29 16:41:50 PDT
Disabling this optimization by checking the result type is super unusual and likely very fragile.  Can you please use the use kinds instead?