Bug 156611

Summary:	AbstractInterpreter should be more knowledgeable about the delete by id operation.
Product:	WebKit	Reporter:	Keith Miller <keith_miller>
Component:	JavaScriptCore	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal
Priority:	P2
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Description Keith Miller 2016-04-14 16:27:52 PDT

Currently the AbstractInterpreter assumes that delete will clobber the world. It could notice that for the set of structures that can reach the delete node the identifier to delete will be a miss.