Bug 107479 - DFG InstanceOf has a code path for the case where child1 is not proven to be a cell, but CheckHasInstance always speculates cell
Summary: DFG InstanceOf has a code path for the case where child1 is not proven to be ...
Status: RESOLVED INVALID
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:
 
Reported: 2013-01-21 15:01 PST by Filip Pizlo
Modified: 2014-03-14 21:26 PDT (History)
7 users (show)

See Also:

Attachments
Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.
Description Filip Pizlo 2013-01-21 15:01:23 PST 
This looks like some kind of dead code.
Comment 1 Filip Pizlo 2014-03-14 21:26:15 PDT 
No, CheckHasInstance checks something other than the base of the InstanceOf.