Bug 106727 - DFG should not forget that it had proved something to be a constant during a merge just because it's merging against the empty value
Summary: DFG should not forget that it had proved something to be a constant during a ...
Status: RESOLVED FIXED
Alias: None
Product: WebKit
Classification: Unclassified
Component: JavaScriptCore (show other bugs)
Version: 528+ (Nightly build)
Hardware: All All
: P2 Normal
Assignee: Filip Pizlo
URL:
Keywords:
Depends on:
Blocks: 106690
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Reported: 2013-01-11 22:14 PST by Filip Pizlo
Modified: 2013-01-14 16:58 PST (History)
7 users (show)

See Also:

Attachments
the patch (2.11 KB, patch)
2013-01-11 22:18 PST, Filip Pizlo 		oliver: review+
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Description Filip Pizlo 2013-01-11 22:14:52 PST 
Patch forthcoming.
Comment 1 Filip Pizlo 2013-01-11 22:18:41 PST 
Created attachment 182458 [details]
the patch
Comment 2 Filip Pizlo 2013-01-11 22:21:55 PST 
This blocks https://bugs.webkit.org/show_bug.cgi?id=106690 because it slightly masks that bug.  When trying to come up with a reduced case of that other bug, I couldn't, because the CFA was artificially dumbing itself down so that it became too dumb to make the mistake that that bug fixes. :-/
Comment 3 Filip Pizlo 2013-01-14 16:58:14 PST 
Landed in http://trac.webkit.org/changeset/139688