[Webkit-unassigned] [Bug 142153] New: BytecodeGenerator shouldn't emit op_resolve_scope as a roundabout way of returning the scopeRegister

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=142153

            Bug ID: 142153
           Summary: BytecodeGenerator shouldn't emit op_resolve_scope as a
                    roundabout way of returning the scopeRegister
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: fpizlo at apple.com

Currently sometimes BytecodeGenerator will emit an op_resolve_scope with the LocalClosureVar mode and 0 as the scope depth, which ultimately gets turned into an operation that just moves the scopeRegister() to the result.  In cases like that, BytecodeGenerator should just use the scopeRegister() directly and not emit anything for scope resolution.

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