Bug 186473

Summary:	[DFG] ArraySlice should support arguments types
Product:	WebKit	Reporter:	Yusuke Suzuki <ysuzuki>
Component:	JavaScriptCore	Assignee:	Yusuke Suzuki <ysuzuki>
Status:	NEW ---
Severity:	Normal	CC:	fpizlo, keith_miller, saam
Priority:	P2
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Description Yusuke Suzuki 2018-06-10 06:47:31 PDT

So frequent use of Array#slice is converting arguments to arrays by

var slice = Array.prototype.slice;

slice.call(arguments);

Our DFG pipeline only supports ArraySlice with JS Array types. JSC DFG should support ArraySlice with arguments.