[Webkit-unassigned] [Bug 171198] New: op_spread should have an ArrayProfile

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=171198

            Bug ID: 171198
           Summary: op_spread should have an ArrayProfile
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: sbarati at apple.com
                CC: benjamin at webkit.org, fpizlo at apple.com,
                    ggaren at apple.com, gskachkov at gmail.com,
                    jfbastien at apple.com, keith_miller at apple.com,
                    mark.lam at apple.com, msaboff at apple.com,
                    ticaiolima at gmail.com, utatane.tea at gmail.com

If we had a good idea of what type of array was being spread, we could emit a CheckStructure in such a way that we could emit more efficient machine code for the spread. We'd also be able to prove it could be spread fast (e.g, not observable iterator protocol).

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