[Webkit-unassigned] [Bug 63972] New: DFG JIT does not support method_check

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=63972

           Summary: DFG JIT does not support method_check
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: fpizlo at apple.com


JSC bytecode contains a method_check opcode that is used to optimize method calls of the form o.foo(...).  The DFG JIT currently does not support this opcode at all, so JS functions that contain method calls cannot be compiled with DFG.  The DFG JIT should support both the method_check opcode and the optimizations associated with it.

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