AbstractInterpreter should be more knowledgeable about the delete by id operation. 
https://bugs.webkit.org/show_bug.cgi?id=156611
Summary AbstractInterpreter should be more knowledgeable about the delete by id opera...
Keith Miller
Reported 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.
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