Bug 106727

Summary: 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
Product: WebKit Reporter: Filip Pizlo <fpizlo>
Component: JavaScriptCoreAssignee: Filip Pizlo <fpizlo>
Status: RESOLVED FIXED    
Severity: Normal CC: barraclough, ggaren, mark.lam, mhahnenberg, msaboff, oliver, sam
Priority: P2    
Version: 528+ (Nightly build)   
Hardware: All   
OS: All   
Bug Depends on:    
Bug Blocks: 106690    
Attachments:
Description Flags
the patch oliver: review+

Filip Pizlo
Reported 2013-01-11 22:14:52 PST
Patch forthcoming.
Attachments
the patch (2.11 KB, patch)
2013-01-11 22:18 PST, Filip Pizlo 		oliver: review+
DetailsFormatted DiffDiff
View All Add attachment proposed patch, testcase, etc.
Filip Pizlo
Comment 1 2013-01-11 22:18:41 PST
Created attachment 182458 [details] the patch
Filip Pizlo
Comment 2 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. :-/
Filip Pizlo
Comment 3 2013-01-14 16:58:14 PST
Landed in http://trac.webkit.org/changeset/139688
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